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44 results about "Water age" patented technology
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Antiaging glass fiber-reinforced polycarbonate composition and preparation method thereof
The invention provides an antiaging glass fiber-reinforced polycarbonate composition, which comprises the following components in part by weight: 20 to 70 percent of polycarbonate resin, 10 to 35 percent of acrylonitrile-butadiene-phenylethylene polymer, 5 to 40 percent of polyethylene graft, 10 to 30 percent of glass fiber reinforce, 0.3 to 0.5 percent of coupling agent, 0.5 to 3 percent of lubricating agent and 0.1 to 1.0 percent of antioxygen. The polycarbonate composition of the invention is free from surface floating fibers has good glossiness, high mechanical performance, high size stability and high thermal resistance. The anti-boiling water aging performance of the polycarbonate composition is improved greatly. The polycarbonate composition can be widely used in electronic and electrical elements such as electrical tool shells, machine bodies, brackets, external gears, three-way valves, mechanical pump parts and the like and is particularly suitable to be used as engineering plastics for use in wet or hot water environments.
Owner:CHINA NAT BLUESTAR GRP CO LTD
City water supply pipe network-based artificial water quality monitoring point addressing method
ActiveCN108320060AImplement grid partitioningEasy to operate and manageGeneral water supply conservationForecastingRoad networksRanking
The invention discloses a city water supply pipe network-based artificial water quality monitoring point addressing method comprising the following steps: simulating pipe network waterpower operation,and combining the road network so as to realize meshing partition of the water supply pipe network whole area; calculating the resident water consumption condition in each mesh; determining the pipenetwork artificial water quality monitoring point number in each mesh; determining distribution state of network users in each corresponding block; calculating the water age of different locations inthe city water supply area and the water age of network users in each mesh; determining special pipe network water quality monitoring points; making big data statistics, analysis, conclusion, ranking,and integrating for the user water consumption on the basis of water meter information, and primarily spotting drafted pipe network artificial water quality monitoring points complying with basic conditions; analyzing one by one via the pipe network waterpower simulation, and determining the final pipe network artificial water quality monitoring points. The method can scientifically and reasonably determine city pipe network water quality monitoring point layout, thus ensuring the representativeness of the water quality monitoring, effectively handling the water quality changes in the water supply pipe network, and providing guiding meanings for optimizing operation and management of the pipe network.
Owner:CHENGDU MUNICIPAL WATERWORKS
Water supply pipe network DMA automatic partitioning method based on graph partitioning
ActiveCN111080483AGuaranteed hydraulic conditionsSmall amount of calculationGeometric CADData processing applicationsGenetic algorithmControl theory
The invention relates to a water supply pipe network DMA automatic partitioning method based on graph partitioning. The method comprises the following steps of obtaining a water supply pipe network hydraulic model and the total daily water supply amount; setting partition parameters; partitioning the water supply pipe network hydraulic model by using a multistage recursive dichotomy algorithm according to the set partitioning parameters to obtain a partitioning result and a partitioning boundary pipe section; and taking the engineering cost of zoning transformation as a target function, takingthe fluctuation range of the pipe network pressure and the node water age as constraint adjustment, and utilizing a genetic algorithm to carry out valve opening and closing selection of the zoning boundary pipe section and installation and arrangement of the flow meter, so as to obtain a valve opening and closing selection of the zoning boundary pipe section and installation and arrangement scheme of the flow meter. According to the method, the pipe network is partitioned through the graph partitioning algorithm, due to the characteristics of the graph partitioning algorithm, the calculated amount can be greatly reduced, the calculation efficiency is high, and the partitioning result can be obtained in a short time. The engineering cost is used as a target function, and popularization inactual engineering application is facilitated.
Owner:SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD +2
Environment-friendly NOx selective catalytic reduction catalyst and preparation method thereof
InactiveCN102658118AEfficient catalytic removalSatisfy and attain purifyingInternal combustion piston enginesDispersed particle separationSulfurCerium
The present invention relates to an environment-friendly NOx selective catalytic reduction catalyst and a preparation method thereof, wherein the catalyst comprises, by mass : 5 wt % to 30 wt % of CeO2, 45 wt % to 20 wt % of ZrO2, 35 wt % to 20 wt % of TiO2, 5 wt % to 10 wt % of SiO2, and 10 wt % to 20 wt % of WO3. A soluble cerium salt, a zirconium salt, a titanium salt, a silicon salt and a tungsten salt which are used as raw materials, an alkali which is used as a coprecipitator, and polyethylene glycol which is used as a thickening agent, are dried and roasted to obtain the catalyst. When the catalyst is at the temperature from 220 DEG C to 560 DEG C, the conversion rate of NOx can reach above 80%, especially at 250 DEG C to 500 DEG C, the conversion rate of NOx can reach above 95%. Further, the catalyst is provided with strong capability of resisting to hot water aging and SO2 poisoning, the activity of SCR still maintaining above 80% after the hot water aging treatment and the sulfur ageing treatment. The catalyst is advantaged in simple preparation process, convenient operation and low cost, and can meet and achieve the standards of existing vehicle exhaust purification and the needs of actual production.
Owner:CHINA AUTOMOTIVE TECH & RES CENT
Bench-scale device of water supply pipe network microbiological test
ActiveCN103937660ASmall footprintContinuous non-cyclic operationBioreactor/fermenter combinationsBiological substance pretreatmentsDisinfectantEngineering
The invention relates to a bench-scale device of a water supply pipe network microbiological test. The device mainly comprises a water tank (28), a water inlet main pipe (30), a water outlet main pipe (29), a branch pipe a (25), a branch pipe b (26) and a branch pipe c (27), wherein the water tank (28) is connected with the water inlet main pipe (30) in series; two ends of each of the branch pipe a (25), the branch pipe b (26) and the branch pipe c (27) are connected with the water inlet main pipe (30) and the water outlet main pipe (29) in parallel. Compared with the prior art, the device disclosed by the invention can be used for realizing comprehensive study on micro-organisms in pipe wall and pipe network water under the conditions of different raw water, different pipe materials, different hydraulic conditions, different water ages, different disinfectants and the like.
Owner:TONGJI UNIV
Two-dimensional mesoscopic numerical value simulation method of water age of surface water
InactiveCN105808812ASimulate water quality accurately and efficientlySmall amount of calculationGeneral water supply conservationSpecial data processing applicationsEutrophicationEulerian method
The invention relates to the field of water environment simulation, and discloses a two-dimensional mesoscopic numerical value simulation method of the water age of surface water. A lattice Boltzmann method is combined with a concept of the water age, the water age can be calculated from the essence of particle movement, and therefore, a model can more accurately and efficiently simulate water quality. A hydrodynamic force-water age model is applied to the Danjiangkou reservoir, so that the water quality variation trend of the Danjiangkou reservoir can be predicted, a relocation diffusion rule of pollutant in a water body can be obtained, an area where eutrophication may happen can be predicted, and a scientific basis is provided for reservoir management; through the cross fusion of the lattice Boltzmann method and water age calculation, two water age simulation methods, i.e., an Eulerian method and a Lagrange method, on the basis of the lattice Boltzmann method are developed; a calculated amount generated when the Lagrange method is used for calculating the water age is lowered, the feasibility of the method is increased, and meanwhile, the development of the lattice Boltzmann method in the field of water quality models can be accelerated; and the lattice Boltzmann method is applied to the calculation of the water age of the Danjiangkou reservoir and is further tightly combined with practical research.
Owner:BEIJING NORMAL UNIVERSITY
Method for researching spawning ground positions of river drifting egg spawning fish
ActiveCN109883405AScientific derivationClimate change adaptationPisciculture and aquariaRiver routingStatistical analysis
The invention provides a method for researching spawning ground positions of river drifting egg spawning fish. The method comprises the following steps of framing spawning riverway ranges; establishing one-dimensional water age simulation models, wherein an unsteady flow process simulation module carries out verification through utilization of actually measured data; laying out fish egg monitoringsections; recording fish egg sampling points, and carrying out gene sequencing to obtain development time when fish eggs are sampled; replaying unsteady flow processes in spawning periods through utilization of the one-dimensional water age simulation models; substituting the sampling points of the fish and the development time when the fish eggs are sampled into the model, obtaining the development time when the fish eggs are sampled through water age space distribution and the gene sequencing, and reversely researching a spawning position of each fish egg; and carrying out statistic analysis on spawning position data of a great number of fish eggs, thereby obtaining main egg spawning grounds of the fish. According to the method provided by the invention, through utilization of the one-dimensional water age simulation models and a gene detection technology, the spawning ground positions of the river drifting egg spawning fish can be researched relatively precisely, so basis for fishhabitat research and protection can be provided.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Method for predicting drinking water disinfection by-products based on multiple linear regression method
PendingCN112149849AReduce testing costsReservationsMaterial analysisDisinfection by-productPotable water
The invention discloses a method for predicting drinking water disinfection by-products based on a multiple linear regression method. The method comprises the following steps: acquiring water age prediction data of drinking water to be predicted and water quality data of the drinking water to be predicted; and inputting the water age prediction data and the water quality data into a linear regression equation for predicting the drinking water disinfection by-product to obtain a drinking water disinfection by-product prediction value. By adopting the method disclosed by the invention, the disinfection by-products in the water supply network can be efficiently and economically predicted.
Owner:JILIN JIANZHU UNIVERSITY
Indoor aging method of rubber powder modified asphalt under joint effect of heat, oxygen and water
ActiveCN102680383AImprove the quality of useExtended service lifeWeather/light/corrosion resistancePreparing sample for investigationPolymer scienceAge method
The invention discloses an indoor aging method of rubber powder modified asphalt under joint effect of heat, oxygen and water. The method comprises the following steps of: (1) determining the pH value and the chloride concentration of the water; (2) sample preparation: pouring the molten rubber powder modified asphalt into a stainless steel flat-bottom disc; (3) short-term heat aging: aging in the asphalt test by use of a film oven; and (4) heat oxygen water aging: dividing the aging process into two stages: heat-oxygen-water aging and heat-oxygen aging. The method disclosed by the invention accurately reflects the change rules of the aging indexes of the rubber powder modified asphalt under the joint effect of multiple factors including heat, oxygen and water to obtain the heat-oxygen-water aging characteristics of the rubber powder modified asphalt, thus providing reference for the laboratory simulation of the rubber powder asphalt under the joint effect of heat, oxygen and water, providing theoretical basis and technical support for improving the road surface using quality of the rubber powder modified asphalt material and prolonging the service life, and also establishing a firm foundation for the development and application of the new material of rubber powder modified asphalt.
Owner:YANGZHOU UNIV
Method for implementing DMA (direct memory access) partitioning of water supply pipe network in extremely small depressurization space
PendingCN114239282AQuality improvementReduce the effects of water pressureData processing applicationsGeneral water supply conservationDirect memory accessTap water
The invention discloses a method for implementing DMA (direct memory access) partitioning of a water supply network in a minimum pressure reduction space, which comprises the following steps of: firstly, defining a similarity calculation formula between nodes, and then optimizing a coefficient in the similarity formula through a function gametiobj in MATLAB (matrix laboratory) so as to determine a partition boundary pipe section. Then, different minimum service water pressures are set and serve as constraint conditions respectively, the average water age of nodes after partitioning and the partitioning cost serve as targets, a function gametiobj is applied to obtain equipment arrangement schemes on multiple boundary pipe sections, and the optimal arrangement scheme is screened out from the equipment arrangement schemes through three principles. And finally, finding out an optimal pipe section replacement scheme by using a simulated annealing algorithm, so that the water pressure of the partitioned pipe network can meet the requirement of specified minimum service water pressure. According to the DMA partitioning method provided by the invention, the overall water quality of the partitioned pipe network cannot be greatly influenced on the basis of successfully completing partitioning, and a certain theoretical basis can be provided for quickening implementation of DMA partitioning, reducing the leakage rate of the pipe network and building an intelligent water supply system for water supply companies in various regions.
Owner:TAIYUAN UNIV OF TECH
Multi-target partitioning method for water supply pipe networks
ActiveCN108717584AComprehensive considerationReasonable partitionGeometric CADGeneral water supply conservationGenetic algorithmEngineering
The invention relates to a multi-target partitioning method for water supply pipe networks. The method comprises the following steps of: (1) inputting data of a water supply pipe network, comprising an adjacency matrix of the water supply pipe network, a permitted scale range of partitions and node service pressure; (2) selecting main pipes and determining candidate partition entrances; and (3) setting a plurality of objective functions and solving a partitioning scheme set of the water supply pipe network by adopting a non-dominated sorting genetic algorithm, wherein the objective functions comprise: minimization of the average pressure of the pipe network, minimization of the average water age of the pipe network and minimization of the reconstruction cost of the partitioning. Compared with the prior art, the method disclosed by the invention has the advantages that the considered factors are more comprehensive and the partitioning is more reasonable.
Owner:TONGJI UNIV
Water age control system for secondary water supply equipment
ActiveCN110939178AThe average water age of the water is shortenedImprove water qualityService pipe systemsWater mainsWater useMechanical engineering
The invention relates to a water age control system for secondary water supply equipment. The water age control system comprises a flowmeter, a liquidometer, an adjusting valve, a pressure meter, a water tank and a controller, wherein the controller is separately connected to the flowmeter, the liquidometer, the adjusting valve and the pressure meter; an intelligent analyzing engine is arranged inthe controller, collects water consumption data of a plurality of months and predicts a water consumption mode curve based on the water consumption data of the plurality of months; and the controllerjudges and classifies the water consumption nature by the water consumption mode curve, calculates a water storage curve of the water tank according to the water consumption mode curve, then acquiresa water inflow curve of the water tank according to the water storage curve and the water consumption mode curve, and controls the adjusting valve in real time according to a target water inflow. Itis ensured that tap water in the water tank is adjusted dynamically.
Owner:熊猫智慧水务有限公司
Water age measurement method for semi-closed water area
ActiveCN108197422AAccurate calculationIn line with the real law of motionGeneral water supply conservationInformaticsMathematical modelNon conservative
The invention discloses a water age measurement method for a semi-closed water area. The method comprises the following steps that: firstly, establishing the hydrodynamic force mathematical model of awater area to be measured; through the hydrodynamic force mathematical model, calculating the water depth and flow velocity information of each water quality point of the water area to be measured; constructing a convective diffusion mathematical model, and setting the boundary condition of the convective diffusion mathematical model; according to the hydrodynamic force mathematical model, calculating to obtain the water level and flow velocity information of each position of the area to be measured and the boundary condition of the convective diffusion mathematical model; calculating the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured through the convective diffusion mathematical model; according to the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured, calculating the instantaneous water age of each corresponding moment of each water quality point of the area to be measured; and finally, according to the instantaneous water age of each corresponding moment of each water quality point of the area to be measured, calculating a time average water age in each time period of each water quality point of the water area to be measured. By use of the method, the water age of the semi-closed water area can be efficiently, conveniently and accurately calculated.
Owner:PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
Secondary chlorination method based on node water age
ActiveCN108975467AGeneral water supply conservationSpecific water treatment objectivesWater volumeComputer science
The invention provides a secondary chlorination method based on node water age. The method comprises the following steps: optimizing the water-weighted residual chlorine age of a whole pipeline network as a minimum target function under a given number of chlorination points to obtain an optimal secondary chlorination location; then optimizing the minimum chlorination amount by taking the percentage of qualified water and the economic type as objective functions to obtain a Pareto curve of the relationship between chlorination amount and qualified water; finally, realizing specific reliabilityof the water quality of the pipeline network and the minimum chlorination amount at least when the qualified water amount is specified under uncertain conditions.
Owner:苏州市自来水有限公司
Water age control system for direct drinking water purification equipment
PendingCN113812851AGuaranteed dynamic adjustmentMaintain dynamic balanceBeverage vesselsNeural architecturesWater useControl system
The invention relates to a water age control system for direct drinking water purification equipment. The system comprises a flow meter, a liquid level meter, a regulating valve, a pressure meter, a water tank, a water age controller and a controller, and the flow meter is used for monitoring real-time water inlet flow; the liquid level meter is used for monitoring the real-time liquid level value of the water tank; the pressure meter is used for monitoring real-time pressure; the regulating valve is used for controlling the water inlet flow of the water tank; the water tank is used for storing direct drinking water; the controller is internally provided with an intelligent analysis engine, and the intelligent analysis engine collects water consumption data in a preset time period and trains a water consumption rule algorithm model based on the water consumption data in the preset time period. The controller obtains a future water consumption curve of a user according to the water consumption rule model, calculates a target liquid level in a future set time period according to the future water consumption curve of the user, and controls the regulating valve in real time through the water age controller according to the target liquid level. The problem of water age of direct drinking water equipment can be solved.
Owner:熊猫智慧水务有限公司
Road asphalt anti-aging agent and preparation method thereof
ActiveCN108250525AGood compatibilityReduce manufacturing costBuilding insulationsAntioxidantUltraviolet lights
The invention relates to a road asphalt anti-aging agent and a preparation method thereof. The road asphalt anti-aging agent comprises the following raw materials by weight percentage: 5-20wt% of waste rubber powder, 5-20wt% of deoiled asphalt, 1-20wt% of catalytic oil slurry, 30-60wt% of aromatic hydrocarbon oil, and 5-40wt% of a stabilizer. Specifically, the stabilizer contains 5-30wt% of nano calcium carbonate, 15-55wt% of carbamide, 20-60wt% of an aromatic amine antioxidant and 5-40wt% of zinc oxide. The preparation method of the road asphalt anti-aging agent provided by the invention hasthe characteristics of low production cost and simple process. The road asphalt anti-aging agent prepared by the method has good intermiscibility with the matrix road asphalt, can effectively improvethe matrix asphalt's all-weather aging resistance, including ultraviolet light irradiation aging, temperature aging and water aging conditions.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method and system for identifying water quality hidden danger points of multi-water-source water supply pipe network
PendingCN112100781ARecognition is intuitiveRaise the level of monitoringGeometric CADData processing applicationsWater sourcePotable water
The invention provides a method for identifying water quality hidden danger points of a multi-water-source water supply pipe network, which comprises the following steps of: S1, performing traceability analysis on water source nodes to obtain a traceability percentage matrix of water consumption of each node from each water source; S2, determining a water supply range of each water source according to the traceability percentage matrix to obtain water supply range partitions; S3, executing water age simulation analysis to obtain a water age representative value of each node in each partition;and S4, identifying a water quality hidden danger point according to the water age representative value of each node of each subarea, and drawing a water quality hidden danger point chart. According to the method, traceability analysis is carried out on the water supply pipe network, water supply ranges of all water sources are partitioned by analyzing a traceability percentage matrix, then waterquality hidden danger points in all partitions are recognized, and finally the water quality hidden danger points are presented in a chart mode, so that water affair workers can be helped to recognizethe specific positions of the water quality hidden danger points of the pipe network more visually; and drinking water safety of the multi-water-source water supply pipe network is guaranteed by improving the monitoring level of water quality hidden danger points.
Owner:GUANGDONG UNIV OF TECH
Residence secondary water supply water age optimization system and method
InactiveCN112031079AGuarantee stabilityEnsure safetyService pipe systemsWater mainsAutomatic controlOutfall
The invention discloses a residence secondary water supply water age optimization system and method. The system comprises a water pool / tank (1), the water pool / tank (1) is provided with a water inlet,a water outlet and a water drainage port, a water inlet electromagnetic valve (2) and a water drainage electromagnetic valve (3) are arranged at the water inlet and the water drainage port of the water pool / tank (1) respectively, a liquid level sensor (4) is arranged inside the water pool / tank (1), an on-line residual chlorine instrument (5) is arranged at the water outlet, the water inlet electromagnetic valve (2), the water drainage electromagnetic valve (3), the liquid level sensor (4) and the on-line residual chlorine instrument (5) are connected to a control cabinet (6), the water inletelectromagnetic valve (2) is controlled by the control cabinet (6) according to signals collected by the liquid level sensor (4), and the water drainage electromagnetic valve (3) is controlled by thecontrol cabinet (6) according to signals collected by the on-line residual chlorine instrument (5) so as to realize automatic circulation control over the water body of the water pool / tank (1).
Owner:SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
Building expansion joint waterproof structure
ActiveCN104863274BGuaranteed stabilityGuaranteed waterproof performanceBuilding constructionsArchitectural engineeringExpansion joint
The invention discloses a waterproof structure for building expansion joints, which comprises: an elastic pad fixedly mounted on the expansion joint; a first waterproof component having a first drainage groove and a U-shaped first connecting portion; a second waterproof component, It has a second drainage groove and a U-shaped second connecting part. The structure of the second waterproof member is symmetrical to that of the first waterproof member. The first waterproof member and the second waterproof member pass through the first connecting part and the second waterproof member. The connecting parts are buckled together and fixedly installed on the elastic pad; after the first connecting part and the second connecting part are buckled together, there is a reserved gap between them. The invention can effectively solve the leakage problem caused by factors such as waterproof aging, shrinkage, cracking, and inconsistent foundation settlement coefficients, and solve the technical problem of anti-leakage of expansion joints in building spaces such as toilets, thereby effectively avoiding water leakage and damage in the later stage. A series of problems such as inconvenient maintenance can effectively reduce the cost of maintenance and repair in the later period and ensure the waterproof quality of construction.
Owner:GOLD MANTIS CONSTR DECORATION
Water age monitoring system and method for water supply network
PendingCN111143992AImprove accuracyPremium Water ServicesVolume/mass flow measurementFluid pressure measurementData acquisitionMonitoring system
The invention discloses a water age monitoring system and method for a water supply pipe network. The system comprises a basic data import module, a hydraulic model module, a water age calculation module, a pipe network monitoring data acquisition module, a data preprocessing module, a data feedback module and a data storage module. The water age monitoring system for the water supply pipe networkprovides services for a water supply enterprise, guides the water supply enterprise to take corresponding measures for areas with higher or lower node water ages, and provides the high-quality watersupply services for users.
Owner:SHENZHEN DONGSHEN ELECTRONICS
Polyvinyl chloride material for high-speed data cable
ActiveCN104031334AImprove hydrophobicityLong-term usePlastic/resin/waxes insulatorsSesquioxideAntimony trioxide
The invention discloses a polyvinyl chloride (PVC) material for a high-speed data cable. The polyvinyl chloride material is characterized by comprising the following components in parts by weight: 100 parts of PVC resin, 32 parts of trioctyl trimellitate, 5 parts of a calcium zinc stabilizer, 8 parts of antimony sesquioxide, 0.4 part of a lubricant, 0.2 part of an antioxidant and 10 parts of a water-resistant modifier, wherein the water-resistant modifier is formed by coating 2 parts of nano barium sulfate, 5.7 parts of calcined kaolin and 2 parts of nano silicon dioxide with 0.3 part of a silane coupling agent; and the lubricant is selected from one or more of stearic acid, barium stearate, calcium stearate, paraffin and polyethylene wax. According to the PVC material, the data cable can be used in a water-soaked environment for a long term; the mechanical stability is good, the electrical performance is stable, and the water ageing resistance performance and the water tree forming resistance performance are achieved in a wet environment, so that the stability of the data cable is further improved and the service cycle of the data cable is further prolonged.
Owner:JIANGSU HENGTONG WIRE & CABLE TECH
Underground water age determination method
The invention provides an underground water age determination method. The method comprises the following steps of: S1, introducing carrier gas into a Freon detector through a first six-way valve arranged on a first carrier gas branch, S2, replacing the gas in the underground water in the sample bottle through a switch valve on a second carrier gas branch, and S3, introducing the gas into an aeration pipe for treatment, collecting Freon through a cryogenic collection pipe, and introducing the Freon into the Freon detector through the first six-way valve. The underground water age determinationmethod is simple in structure, the content of Freon in the underground water can be obtained and detected, and then the accurate age of the underground water is obtained.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Pipe network water age control system
PendingCN113251318AGuaranteed water quality indicatorsAchieve water age controlPipeline systemsControl systemPotable water
The invention relates to a pipe network water age control system. The pipe network water age control system comprises a water inlet pipe, wherein a water pump and an inlet electric valve are sequentially arranged on the water inlet pipe, the outlet end of the water inlet pipe is connected with the bottom end of a vertical pipe, and the top end of the vertical pipe is connected with a flow compensation tank; a tail end electric valve is further arranged at the position, close to the top end, of the vertical pipe; a plurality of branch pipes are arranged on the vertical pipe, and an intelligent water meter is arranged on each branch pipe; the water pump, the inlet electric valve, the tail end electric valve and the intelligent water meters are all connected with a controller; the controller controls the flow compensation tank to supplement water to the vertical pipe by controlling the water pump, the inlet electric valve and the tail end electric valve. The high-quality index of drinking water of the vertical pipe and a user pipe network can be ensured.
Owner:SHANGHAI PANDA MACHINEGRP CO LTD
Water age detection method based on parallel primary model
PendingCN113571135ARealize intelligenceAccurate detectionChemical processes analysis/designTesting waterUrban water supplyPotable water
The invention relates to a water age detection method based on a parallel primary model. The method comprises the steps of acquiring the water temperature and residual chlorine of outlet water of water supply and outlet equipment, and recording the acquisition time; carrying out a three-factor orthogonal experiment according to the collected water temperature, time and residual chlorine and the initial chlorine concentration, determining the attenuation rate of residual chlorine in the water outlet equipment, and the attenuation rate of residual chlorine comprising the rapid consumption rate of residual chlorine and the slow consumption rate of residual chlorine; establishing an Arrhenius relation model of the residual chlorine attenuation rate and the water temperature; establishing the parallel primary model according to the Arrhenius relation model to simulate the change conditions of residual chlorine and water age in the water body; and processing the parallel primary model by utilizing linear regression estimation, and approximately estimating the water age of the water outlet equipment under the condition that the current residual chlorine, the initial residual chlorine and the water temperature are known. According to the invention, intelligent and precise detection of the water age of drinking water in an urban water supply system can be realized.
Owner:上海陌果科技有限公司
A site selection method for artificial water quality monitoring points based on urban water supply network
ActiveCN108320060BEasy to operate and manageGuaranteed representationGeneral water supply conservationForecastingWater useUrban region
Owner:CHENGDU MUNICIPAL WATERWORKS
A water age control system for secondary water supply equipment
ActiveCN110939178BThe average water age of the water is shortenedImprove water qualityService pipe systemsWater mainsWater useMechanical engineering
Owner:熊猫智慧水务有限公司
A kind of water age determination method of semi-enclosed water area
ActiveCN108197422BAccurate calculationIn line with the real law of motionGeneral water supply conservationInformaticsMathematical modelNon conservative
The invention discloses a water age measurement method for a semi-closed water area. The method comprises the following steps that: firstly, establishing the hydrodynamic force mathematical model of awater area to be measured; through the hydrodynamic force mathematical model, calculating the water depth and flow velocity information of each water quality point of the water area to be measured; constructing a convective diffusion mathematical model, and setting the boundary condition of the convective diffusion mathematical model; according to the hydrodynamic force mathematical model, calculating to obtain the water level and flow velocity information of each position of the area to be measured and the boundary condition of the convective diffusion mathematical model; calculating the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured through the convective diffusion mathematical model; according to the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured, calculating the instantaneous water age of each corresponding moment of each water quality point of the area to be measured; and finally, according to the instantaneous water age of each corresponding moment of each water quality point of the area to be measured, calculating a time average water age in each time period of each water quality point of the water area to be measured. By use of the method, the water age of the semi-closed water area can be efficiently, conveniently and accurately calculated.
Owner:PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
PVC material for high-speed data cables
ActiveCN104031334BImprove hydrophobicityLong-term usePlastic/resin/waxes insulatorsSesquioxideAntimony trioxide
The invention discloses a polyvinyl chloride (PVC) material for a high-speed data cable. The polyvinyl chloride material is characterized by comprising the following components in parts by weight: 100 parts of PVC resin, 32 parts of trioctyl trimellitate, 5 parts of a calcium zinc stabilizer, 8 parts of antimony sesquioxide, 0.4 part of a lubricant, 0.2 part of an antioxidant and 10 parts of a water-resistant modifier, wherein the water-resistant modifier is formed by coating 2 parts of nano barium sulfate, 5.7 parts of calcined kaolin and 2 parts of nano silicon dioxide with 0.3 part of a silane coupling agent; and the lubricant is selected from one or more of stearic acid, barium stearate, calcium stearate, paraffin and polyethylene wax. According to the PVC material, the data cable can be used in a water-soaked environment for a long term; the mechanical stability is good, the electrical performance is stable, and the water ageing resistance performance and the water tree forming resistance performance are achieved in a wet environment, so that the stability of the data cable is further improved and the service cycle of the data cable is further prolonged.
Owner:JIANGSU HENGTONG WIRE & CABLE TECH
Water supply pipe network biofilm growth simulation device with multi-working-condition conversion
PendingCN112920942AControl hydraulic retention timeIncrease flow rateBioreactor/fermenter combinationsBiological substance pretreatmentsPeristaltic pumpBiofilm growth
The invention discloses a water supply pipe network biofilm growth simulation device with multi-working-condition conversion, and relates to the technical field of environment technology and water treatment, the device comprises a water tank, the top of the water tank is fixedly connected with a water inlet, a stirrer is arranged in the water tank, one side of the water tank is fixedly connected with a water outlet pipe, the water outlet pipe is connected with a peristaltic pump, the peristaltic pump is connected with an outer barrel inner wall hanging piece type pipeline biofilm reactor through a water inlet pipe, the outer barrel inner wall hanging piece type pipeline biofilm reactor is driven by a programmable brushless frequency conversion direct current motor, and a water outlet is formed in the lower portion of the outer barrel inner wall hanging piece type pipeline biofilm reactor and connected with a water drainage pipe. The device is simple in structure, can simulate the growth environment of a pipe network biofilm by setting the combination of various shear forces and variable flow modes, can jointly perform multi-working-condition conversion research on water quality, water age, hydraulic conditions and the like, has good stability and more hanging piece positions, can perform multi-working-condition conversion research at the same time, can simulate a more real pipe network flow state, and can be widely popularized in the research field.
Owner:EAST CHINA JIAOTONG UNIVERSITY
Drinking water disinfection byproduct prediction method and system
PendingCN112149822AReduce testing costsFast convergenceForecastingTesting waterDisinfection by-productPotable water
The invention discloses a drinking water disinfection byproduct prediction method and system. The method comprises the following steps: acquiring water age prediction data of drinking water to be predicted and water quality data of the drinking water to be predicted; and inputting the water age prediction data and the water quality data into an adaptive genetic BP neural network model for predicting the drinking water disinfection by-product to obtain a drinking water disinfection by-product prediction value. By adopting the drinking water disinfection byproduct prediction method and system, the disinfection byproducts in the water supply pipe network can be efficiently and economically predicted.
Owner:JILIN JIANZHU UNIVERSITY
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