607results about How to "Make full use of" patented technology

The invention discloses a car sharing method and system. The system comprises a reserving terminal (1), a network server (2), a vehicle-mounted device (3), a radio frequency identification card (4) and a database server (5). The reserving terminal (1) is connected with the network server (2) by means of network communication. The radio frequency identification card (4) is connected with the vehicle-mounted device (3) through radio frequency. The vehicle-mounted device (3) is connected with the network server (2) through a network. The network server (2) is connected with the database server (5) through a network. A user reserves a car needed for use and a time period through the reserving terminal (1) and sends an order to the network server (2), the network server (2) sends the order to the vehicle-mounted device (3) of the corresponding car, the user takes the car by himself / herself after arriving at a specified parking site within the reserved time period and checking the identity with the vehicle-mounted device (3) through the radio frequency identification card (4) and returns the car by himself / herself to the specified parking site within the reserved time period, and the network server (2) conducts expense settlement according to the order time of the user and the traveling distance of the car after the car is returned.

The invention provides a method for extracting heavy liquefaction oil and an intermediate-phase bitumen matter from coal liquefaction residuals and application thereof. The method comprises the following steps of: adding coal liquefaction residual powder and an extraction solvent to a stirring kettle together for extraction to obtain extraction liquid and extraction residues; carrying out solid-liquid separation on the obtained extraction liquid and extraction residues; carrying out steam stripping on the obtained extraction residues, and recovering an organic phase after oil-water separation; mixing the extraction liquid with the organic phase, and then delivering into a solvent recovery unit; recovering the extraction solvent for recycling use or being returned to a liquefaction productprocessing unit by using a distillation method and / or an evaporation method, wherein residuals obtained after the extraction solvent is recovered are liquefaction residual extractives; delivering theobtained liquefaction residual extractives into a heat treatment unit, and separating the heavy liquefaction oil from the intermediate-phase bitumen matter by using a heating dry distillation method;and adding the obtained heavy liquefaction oil and other recycling solvents in a direct liquefaction process to a coal liquefaction solvent hydrogenation unit together.

The invention relates to an extraction method of direct coal liquefaction residues and application of extracts. The extraction method comprises the following steps: a) adding coal liquefaction residue powder and a first extraction solvent to a stirred tank to undergo primary extraction; b) carrying out solid-liquid separation on the extracted mixture obtained in the step a) and recovering the first extraction solvent from the obtained liquid in a solvent recovery unit and recycling the first extraction solvent; c) obtaining extracts after recovering the first solvent and mixing the extracts with a second extraction solvent to undergo secondary extraction; d) carrying out solid-liquid separation on the extracted mixture obtained in the step c), obtaining heavy liquefied oil after recovering the second extraction solvent from the obtained liquid in the solvent recovery unit and then carrying out moderate hydrogenation on the heavy liquefied oil and other recycled solvents in a coal liquefaction solvent hydrogenation unit and using the product as the recycled solvent in the coal liquefaction process; and e) carrying out heat treatment on the asphaltic substances obtained in the step d) by heating and carbonizing to obtain mesophase asphalt and oils.

The embodiment of the invention discloses a meter reading method, a meter reading device and a meter reading system. The meter reading method comprises the following steps: continuously sending first meter reading commands and second meter reading commands to central coordination device CCO by a concentrator during first meter reading period, wherein the first meter reading commands are used for indicating the CCO to acquire first measurement data of a measuring meter, and the second meter reading commands are used for indicating the CCO to acquire second measurement data of a second measuring meter; and receiving first reporting messages and second reporting messages sent by the CCO, wherein the first reporting messages comprise first metering data and markers of the first measuring meter, and the second reporting messages comprise second metering data and markers of the second metering meter, so that the meter reading efficiency is improved.

The invention relates to an automatic resource distribution method in a cloud calculation environment. The method comprises the following steps: A. a "resource pool" in the cloud calculation environment is defined and managed; B. a virtual machine is pre-established; C. when a resource application is put forward by a user, resources in the resource pool is automatically matched by a management system, and the resources are listed to an optional queue if types and configuration are both matched; if the number of the optional queue surpasses a requirement of the user, the resources are selected from the optional queue to be distributed to the user according to a presorting dynamic resource distribution algorithm; D. when the pre-established virtual machine cannot meet the requirement of the user, insufficient number of the virtual machines are established after the resource application of the user is submitted. E. the resources are automatically applied and returned, and user data are confidentially stored or selectively deleted according to the requirement; and F. statics and analysis are performed on the requirement of the user, and a resource distribution report form is automatically generated. The process of the method is rapid and safe and automation is realized so that complexity and management cost of resource distribution in the cloud calculation environment are reduced, working efficiency is enhanced and resource utilization rate is also scientifically enhanced.

The invention discloses a full-separating method of high-purity rare earth oxide from rare earth rare earth ore reinforced and sintered by sulfuric acid, which is characterized by the following: producing La2O3, Ce2O3, Pr5O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3 and Y2O3 through ultrasonic extracting-electrochemical quantivalence-changing synthetic separating technique; oxidizing Ce3+ into Ce4+; reducing Eu3+ into Eu2+ t oseparate from other tervalent rare earths.

The invention discloses a routing and spectrum resource allocation method and a system for resource awareness in an elastic optical path network. The method comprises the following steps that when a request for communication service between an originating node and a destination node arrives, firstly whether the established idle optical paths in the current network can carry the communication service or not is judged, if so, the idle optical paths are directly used for communication, and if not, a PCE (Path Computation Element) generates an auxiliary list of candidate optical paths, wherein the auxiliary list contains link hops of each candidate optical path; a modulation method is determined according to the link hops and frequency slots required by the corresponding candidate optical path for carrying the communication service are computed; the PCE selects a working path according to the required frequency slots and the available frequency slots for the optical path; frequency slot distribution is conducted in the working path to establish a new optical path; and communication is conducted between the originating node and the destination node. After the communication is completed, the new optical path is temporarily not removed, a timer is started up and the steps are repeated within fixed time to realize the resource awareness in the optical path network and solve the problem of high network service blocking rate caused by blockage of the shortest path.

The invention discloses a parking guidance system based on LBS (location based service). The parking guidance system consists of a parking lot server side, a server and a client side, wherein, the parking lot server side comprises an exit sensor and an entrance sensor which are respectively arranged on lifting levers at an exit and an entrance of a parking lot, and the sensors collect parking space information of the parking lot in real time and send the information to the server; the client side acquires car position information through a positioning module and then sends the information to the server; and according to the received parking space information of the parking lot, the server selects three parking lots based on a near-to-far distance and low-to-high charges principle, and sends the position information of the parking lots to the client side. The parking guidance system based on the LBS has the characteristics of realizing convenient and fast parking, fully and reasonably utilizing resources and facilitating energy conservation and emission reduction.

The embodiment of the invention provides a load regulation method and a load regulation device in a cloud computing environment. The cloud computing environment comprises one or more storage physical machines, and computing examples operate on the storage physical machines. The method comprises the steps of computing the load state of the currently processed storage physical machine; when the condition that the storage physical machine is in a low-load state is judged, increasing the resource limit of the corresponding computing example; when the condition that the storage physical machine is in a high-load state is judged, decreasing the resource limit of the corresponding computing example; when the condition that the storage physical machine is in an overload state is judged, transferring the corresponding computing example to other storage physical machines, or, stopping operation of the corresponding computing example. The spare computing resources of the physical machines can be fully and reasonably utilized, the service quality is improved, isolation among tasks operating on the physical machines is improved, and excessive utilization of the resources of the physical machines by tasks beyond the storage service is limited, so that the influence of the tasks beyond the storage service on the storage service is reduced.

The invention discloses an overlaying welding agent core welding wire with abrasive wear resistance. A steel strip is wrapped with alloy powder and is subjected to drawing path by path and diameter reduction through a wire-drawing die to form the overlaying welding agent core welding wire, wherein the diameter of the overlaying welding agent core welding wire is between 2.4 and 3.2 mm; the length of the overlaying welding agent core welding wire is freely set; the steel strip is one of an SPCC steel strip, a 08A steel strip and a 08Al steel strip with width of between 18 and 22 mm and thickness of 0.45 and 0.6 mm; and the aluminum alloy powder is manufactured from waste steel and an alloying agent. The overlaying welding agent core welding wire is designed according to the composition requirement of overlaying welding metal; and compositions are fully homogenized in the smelting process of pulverization, thereby overcoming the disadvantages that the prior medicine powder for producing the overlaying welding agent core welding wire adopts a mechanical mixing process to easily cause unevenness of the compositions. The overlaying welding agent core welding wire uses the waste steel as one of raw materials of the overlaying welding agent core welding wire with abrasive wear resistance, fully utilizes contained alloy elements, improves the utilization rate of the alloy elements, reduces the cost for the overlaying welding agent core welding wire and achieves the aims of energy conversation and emission reduction.

The invention discloses a recognition-based access network selecting method, mainly used for solving the problems that the switching between networks is frequent and the utilization of network resources is unreasonable because the mobility of a user in a wireless local area network and a present load condition of a network are not comprehensively considered in a conventional method. The method comprises the following steps: utilizing a honeycomb network to periodically forecast the number of users requesting access in a honeycomb cell and a WLAN (Wireless Local Area Network) cell and an overall distribution status of mobility of the users in the WLAN cell; with an optimal network property as a target, calculating an optimal access decision threshold; and when a new service request is in the WLAN cell, comparing a shift-out probability of the users with a selecting decision threshold of an access network by the honeycomb network and informing the users of selecting a corresponding network for access according to a comparing result. The method is adapted to the change of a network environment, the switching frequency between the honeycomb network and the WLAN network is reduced and a network throughput is increased.

The invention provides a cloud computing energy management system and method based on green energy resources. The system comprises an energy acquisition module, a node priority level setting module, a node energy supply condition setting module, a node electricity consumption predicating module, an electricity distribution processing module, a node energy supply control module and an energy storage module. The energy acquisition module, the node priority level setting module, the node energy supply condition setting module and the node energy consumption predicating module are connected with the electricity distribution processing module. The electricity distribution processing module is connected with the node power supply control module and the energy storage module. By means of the cloud computing energy management system and method, the green energy resources can be managed dynamically in real time for the instability of the green resources, the energy resources can be fully utilized reasonably, and the energy resource utilization rate is increased; meanwhile, energy consumption caused by a last-dispersion first-concentration electricity distribution mode required by a traditional power grid is lowered, and electricity waste is reduced.

The invention discloses an original ecology organic cultivation integrated technology under dendrobium officinale. The technology full simulates the wild environment of natural growth under the dendrobium officinale mountainous area, no greenhouse facility is needed, vegetation which is manually rimmed is used for overshadowing, dendrobium officinale tissue culture seedling are directly transplanted to culture medium which is provided with excellent breathability and is manually prepared under wood after being disinfected, or is directly transplanted to a loose ground which is in a natural state and is rich of organic humus under wood for open type, wild-mimic healthy and ecological planting, biogas slurry, silkworm feces and spring water which are dedicated for the dendrobium officinale are applied, the water and fertilizer supply of the dendrobium officinale is ensured, American taxus chinensis is moderately interplanted in a base for driving pests, the survival rate of transplanting of the dendrobium officinale tissue culture seedling can reach over 95 %, the effective elements are high in content, the quality is excellent, no chemical drug residue is produced, the management is convenient and the investment is smaller. The specific steps comprises base selection, base cleaning, biogas slurry preparation, mist spray irrigation system installation, woodiness medium manufacturing, culture medium pavement, tissue culture seedling disinfection, transplantation, base sterilization, water and fertilizer management, pest control and harvesting.

The invention belongs to the field of the distribution-type renewable power supply utilization in an intelligent power grid and relates to an electric energy router which comprises a control unit, a wireless module, a signal detection and electric energy metering module, a switch array and a router port, wherein the router port comprises a power supply port and a load port; the power supply port comprises a power supply port dedicated for the mains supply and a plurality of common power supply ports; the control unit carries out the optimal matching on the power supply and the load according to the electric energy quality information of a power supply connected with a common power supply port and the electricity utilization characteristics of the load connected with the load port, wherein the electric energy quality information is collected by a signal detection and electric energy metering port of the power supply or is obtained by a wireless module, and the electricity utilization characteristics are collected by a load signal detection and electric energy metering port or is obtained by the wireless module; and matched power supplies and loads can be connected or switched through the switch array. According to the electric energy router, the on-grid management of various distribution-type power supplies and the optimal load matching can be realized.

The invention discloses a coupling utilization system and method of anaerobic fermentation of fruit and vegetable wastes and afterheat of a bio-gas generator. The system comprises a pretreatment device, a tempering preheating tank, a first extrusion solid-liquid separator, a hydrothermal reactor, a high-temperature dry fermentation bin, a second extrusion solid-liquid separator and a drying machine which are sequentially communicated, and also comprises a medium-temperature high-efficiency anaerobic digestion tank, a bio-gas purifier, a bio-gas generator unit and a first heat exchange device, wherein liquid outlets of the first extrusion solid-liquid separator and the second extrusion solid-liquid separator are communicated with an inlet of the medium-temperature high-efficiency anaerobic digestion tank. According to the coupling utilization system of the anaerobic fermentation of fruit and vegetable wastes and the afterheat of a bio-gas generator, the bio-gas generation afterheat is combined with temperature-rising and heat preservation of anaerobic fermentation, intensified hydrolysis of solid residues, high-temperature dry fermentation of solid residues and drying of fermentation residues like solid organic fertilizers, so that the comprehensive energy sources and resource utilization efficiency of fruit and vegetable wastes are improved.

A vehicle type recognition method based on CNN multiple-features combining and multi-core sparse representation includes the steps of using a smart traffic camera to take a vehicle image under complex scene, conducting pretreatment for the vehicle image, designing five convolutional layers and three full connection layers and automatically extracting global and local characteristics of the vehicle based on AlexNet network in CNN, taking the feature maps of the first, second and fifth pooling layers and sixth and seventh full connection layers subjected to column stretching as vehicle feature components and inputting to five different single-core functions, forming a combined feature matrix through weighted fusion, solving the weight of each function and the projection matrix of the combined feature matrix, and realizing vehicle type recognition according to core sparse minimal reconstruction error. Real-time vehicle type identification can be realized, traffic flow information needed can be extracted, traffic jam problem can be solved, and general planning and road construction of a road network are facilitated.

The invention discloses a flue-cured tobacco cultivation method fitting in with the light environment of the Yunnan tobacco-growing area and belongs to the technical field of tobacco plant cultivation. The flue-cured tobacco cultivation method comprises the following steps of float breeding, soil preparation and ridging, transplanting under film, management in film covering period and field management. The seeding time is from mid December to mid February, the float disc floating seedling method is adopted, and seeding hardening lasts for 8-14 days before transplanting; ridging is conducted after the soil is pulverized and moisture is stored, and inorganic fertilizer and cake fertilizer which is thoroughly decomposed are mixed to be applied to the field; the transplanting period is from mid March to mid April, the density of tobacco plants is 1000-12000 plant / mu, each tobacco plant is irrigated with 1.5-2.5kg root water after transplanting, and colored mulching film is covered; top dressing is conducted twice after transplanting, and seeding leading is conducted 15-25 days after the top of each tobacco seeding ejects the film; the mulching film is removed when the tobacco plants enter the mid of the vigorous growth period, earthing up, weeding and watering are conducted in time, and topping, leaf reserving and bifurcation removing are conducted. The flue-cured tobacco cultivation method can fitting in with the light environment of the Yunnan tobacco-growing area, the local light source can be utilized fully and reasonably, the quality of tobacco leaves can be improved, and the aroma style of the fen-flavor tobacco leaves is enhanced.

The invention relates to a Microorganisms or / and biological enzyme extracting method for plant anthocyanin, belonging to the technical field of biological engineering. The method comprises the following steps of: classifying plants containing anthocyanin for smashing, adsorbing water, freezing the plants, heating the plants for thawing, pressing the plants, filtering for making juice, cracking and degrading the anthocyanin by the microorganisms or / and the biological enzyme cracking anthocyanin glycosidic bond, utilizing an anion active agent for precipitation reaction, degrading the precipitate by the microorganisms, and carrying out precipitation separation and evaporation concentration. Cation anthocyanin with the real content of more than 95%, namely color primitive but not the anthocyanin can be obtained by the technology of the invention. The cation anthocyanin made by the invention does not need human intestinal microorganisms for degrading, and is directly adsorbed and utilizedby a human body or directly goes into human blood. The medical care value of the plant anthocyanin is much higher than that of the anthocyanin.

The invention discloses a joint path selection and power distribution method for energy collection nodes in a wireless sensor network, and belongs to the field of cooperative communication technologies. The method comprises the steps of analyzing a system scene, describing problems; establishing a system mathematic model; and then finding the optimal solution by using an optimization method. The method aims at the special application scene and is derived from the actual application, and being different from the traditional independent sensor node or gateway resource distribution, the method comprehensively considers the joint power distribution and path selection of sensor nodes and gateways, and maximizes the handling capacity performance of the communication nodes by using the gateways as relay stations. According to the method of the invention, the solution of an optimization problem is processed by using convex optimization to convert a target function of the optimization problem without approximate calculation, so that computation complexity is greatly reduced while accuracy of the problem is not influenced, and delay generated by system overheads is reduced; a Lagrangian multiplier method is used in an optimizing process, and thus an optimizing speed is rapid; a subgradient method and an incremental step length are used in an iterative process, so that optimizing is more accurate.

The invention discloses a group customer system calling queuing device. The invention comprises a calling waiting queue unit used to distribute the callings in different priority levels so that the callings can be dealt in a sequence according to the preset priority levels, and generate the calling waiting distribution news; an idle seating queue unit used to distribute the telephonist seating in the calling waiting queue unit so that the telephonist can be in the queue when registration but out of the queue when write-off. The idle attendance queue also helps the seating to be in the queue when the situation turns into idle from busy and out of the queue when the situation turns into busy from idle, and generate the idle seating registration and write-off distribution news; an information processing module used to response the calling waiting distribution news and the idle seating registration and write-off news and deal with them. Therefore, the invention can not only guarantees the high priority call to be dealt by the telephonists firstly, but also makes full use of the telephonist seating resource.

A method for the joint production of monopotassium phosphate, calcium hydrophosphate and compound fertilizers through by subjecting phosphorite to mixed acid resolution is characterized in that the method comprises the steps of taking sulphuric acid and potassium chloride to prepare chlorine hydride and acid potassium sulfate; conducting acidolysis reaction after phosphorite slurry absorbs chlorine hydride; preparing monopotassium phosphate through the reaction between an acidolysis filtrate and calcium oxide and lemery; agitating a mixture of the acidolysis fitrate with monopotassium phosphate crystallization mother liquor to neutralize and prepare calcium hydrophosphate; preparing recycle acid through the reaction between the acidolysis filtrate with sulphuric acid; preparing full water-solubility compound fertilizers through the reaction between recycle acid and an acid potassium sulfate solution and ammonium hydrogen carbonate or ammonia, etc. The method can successfully solve the impurity interference problem in the production of phosphate by using phosphorite of middle-low grade, and increase the reclaim rate of phosphorus pentoxide to approximate 100%. The method has the advantages of fully utilizing resources, simplifying process and devices, reducing corrosion, saving energy, reducing acid consumption and cost, eliminating pollution, and achieving good technical and economic effects.

The present invention relates to a solar composite energy system based on solid adsorption refrigerating machine in the energy-saving field. Said system includes solar collection system, solar hot water supply system, solar floor heating system, solar air-conditioning system, solar natural ventilation system and control system.

The invention discloses a combined resource distribution method based on an energy acquisition cooperation communication system and belongs to the cooperation communication technology field. The method comprises steps of system scene analysis and problem resolution; system mathematics model establishment and optimal solution calculation on the basis of an optimization method. According to the method, for the special application scene from a practical application, compared with a relay selection method in the prior art, problems of high complexity and high network cost existing in relays in the prior art are solved, a single relay node selection algorithm and a corresponding resource distribution algorithm are searched from an easy-practical-application angle, single relay cooperation communication on the basis of energy acquisition is considered, a throughout expression under the scene is derived, optimal relay selection and power distribution are considered in a combined mode, and the method has great guiding meaning.

The invention discloses a method for refined purifying diatomite from diatomaceous clay in Miyi County of Sichuan Province. According to the present invention, diatomaceous clay in Miyi County of Sichuan Province is adopted as a raw material. The method comprises: adding a dispersant; carrying out hydraulic classification and ultrasonic cleaning to prepare a diatomite concentrate containing more than 80% by mass of SiO2; further carrying out low temperature calcination at a temperature of 650-700 DEG C; carrying out a acidification to prepare a refined diatomite concentrate containing more than 90% by mass of the SiO2. Because diatom of the diatomaceous clay in Miyi County of Sichuan Province is small, and adhering clay particles are weeny (average particle diameter is about 2 [mu]m), the diatom and the adhering clay thereof can be effectively separated through crushing, activating dispersant processing, ultrasonic water processing, calcining and acidifying. With the present invention, the mass percentage of the SiO2 of the diatomite is improved; impurity content is reduced; pollution-free technology requirement is reached; and resources rational utilization is guaranteed.

The invention provides a process method for separating quartz sand, arkosic sand and iron powder from river yellow sand. The method mainly comprises the following process steps of (1), performing desliming, grading and sheet mica removing; (2), removing iron through magnetic separation and gravity separation; (3), removing an oxidized skin through alkaline wash; (4) performing acid neutralization and removing the iron; (5) separating the quartz sand from the arkosic sand through flotation separation; (6) removing the iron through water wash, the magnetic separation and the gravity separation; (7) removing variegated pellets through photoelectric separation; (8) recycling fine iron powder made of iron. The quartz sand produced by the process method is high in purity, wherein the content of SiO2 is 98.0-99.0%, and the content of Fe2O3 is 0.009-0.015%. The produced arkosic sand can serve as materials of ordinary glass and ordinary ceramics. Metallics obtained through the magnetic separation and the gravity separation can produce the fine iron powder with the grade larger than or equal to 66%. By means of the process method, yellow sand resources are fully utilized without any waste, and the whole production process does not discharge waste alkali and waste acid. Therefore, the process method is friendly to the environment.

The invention discloses a heat recovery type oil gas recovery device adopting condensation and temperature swing adsorption and pressure swing adsorption combined technology. The device comprises a first refrigerating system, a second refrigerating system, a third refrigerating system, an oil gas condensation and oil product collecting system and a heat recovery type adsorption system, wherein thethird refrigerating system is an overlapped type refrigerating system and is used for supplying a lower-temperature cold source to condense light hydrocarbon components in oil gas. Three-stage condensation is adopted for condensing oil gas and recovering oil products; an activated carbon pressure swing adsorption mode is adopted for deeply purifying oil gas to meet discharge requirements; heat sources of the refrigerating systems are utilized for completing desorption through a vacuum mode; and free cold sources of the refrigerating systems are utilized for enhancing the adsorption effect. The device disclosed by the invention has the advantages that the energy utilization rate is improved, the cold capacity and the heat capacity of the oil gas are fully utilized for performing exchange,the cold sources and the heat sources generated by the refrigerating systems are utilized for supplying cold capacity and heat capacity for adsorption and desorption to form optimal operation states of low-temperature adsorption and high-temperature desorption, the efficiency is high, the energy is saved, and the advantages of pressure swing adsorption and temperature swing adsorption are combined.

The invention relates to large-scale methanol multi-effect energy-saving rectifying device and process. Main equipment used in the process sequentially comprises a pre-rectifying tower, a second rectifying tower, a pressurizing tower, an atmospheric tower and a recovering tower, wherein the tops of the second rectifying tower, the pressurizing tower and the atmospheric tower are respectively usedfor discharging refined methanol, the top of the recovering tower is used for discharging fusel oil, and the bottom is used for discharging purified wastewater. Because one rectifying tower is additionally arranged, and the process parameter of each tower is adjusted, two methanol multi-effect energy-saving rectifying processes by five towers are obtained, the effective energy loss is reduced, thereby energy consumption is reduced. In addition, the diameter of each tower is reduced, the amplification effect of relevant equipment, caused by the oversize diameter of each tower, is greatly reduced. The process has the advantages of reasonable design, the energy is fully and reasonably utilized in the process, the energy consumption of the whole device used in the process is reduced by 20%-30% higher than that of the device used in the traditional double-effect process, and the purity of a product reaches the American AA-level standard.

The invention discloses a sludge dewatering method and a special oven thereof, and the sludge dewatering method comprises the following process steps: 1) pressure filtration: carrying out the pressure filtration on sludge which is not carried out dewatering treatment and has the water content of above 98% by using a plate-frame machine till the water content is below 70%; 2) crushing: shattering the sludge by using a wet soil crushing machine; and 3) drying by a heat pump: leading the sludge to pass through the heat pump drying device to reduce the water content of the sludge to below 30%. The special oven for the sludge dewatering method comprises a box body, a hot air circulation pipeline, a heat pump heating device and a heat insulation device, the oven is provided with a plurality of layers of conveyor belts from top to bottom, the driving directions of the adjacent layer of the conveyor belts are reverse, and a vertical projection point of a terminal point of each layer of the conveyor belt falls on the lower layer of the conveyor belt. The special oven has the advantages of low energy consumption cost, no environmental pollution and good drying quality.

The invention discloses a stuff metal particle used in stack welding, wherein the particles are 0.1-5.0mm, comprising S less than 0.05%, P less than 0.05%, oxygen less than 60ppm, and nitrogen less than 60ppm, while other chemical components are set by object metal. The metal particles are directly granulated from waste steel and iron alloy, with high alloy utilization and low cost. The invention can prepare stuff metal particles with corrosion resistance, abrasion resistance and thermal resistance, with high alloy content.