31results about How to "Relieve water stress" patented technology

The invention relates to a low temperature dyeing technology for pure cotton fabrics. The technology which adopts low temperature preprocessing, polishing and low temperature dyeing one-bath process comprises the following steps: 1, carrying out low temperature preprocessing: adding a dyeing one-bath assistant to a dye solution, adjusting the temperature to 40-60DEG C, and continuously reacting for 15-30min; 2, polishing: adjusting the temperature to 35-60DEG C and the pH value to 5.5-6, adding a neutral polishing enzyme having a weight accounting for 0.2-0.5% of the weight of the fabrics, and continuously reacting for 15-20min; and 3, carrying out low temperature dyeing: adjusting the temperature to 35-45DEG C, sequentially adding a low temperature active dye, anhydrous sodium sulfate, soda ash and a caustic soda solution at a certain time interval, and reacting. The low temperature dyeing technology has the advantages of simple operation, small pollution, low energy consumption and the like.

The invention discloses a zero-energy-consumption rainwater irrigation system. The zero-energy-consumption rainwater irrigation system comprises a water storage tank, an air force water lifting device, a water tank and an irrigation subsystem which are sequentially connected through a pipeline. An overflow pipe connected with the water storage tank is arranged on the water tank, and a valve is arranged on the pipeline connecting the water tank with the irrigation subsystem. Rainwater is lifted to a certain height by air energy, so that a certain potential energy is generated, and much energy source consumption is reduced by rainwater which can automatically flow. Efficient utilization of the rainwater can be realized, and municipal water pressure can be alleviated. Automatic or remote control of rainwater irrigation can be realized, labor investment of municipal personnel is reduced, and external energy source for the integral system is not required.

The invention relates to a rainwater quality control regulation and storage system, and belongs to the field of water treatment technologies. The rainwater quality control regulation and storage system comprises a rainwater pipeline, a gate valve, an initial rainwater regulation and storage tank and a rainwater utilization regulation and storage tank. The gate valve is arranged on the rainwater pipeline, the initial rainwater regulation and storage tank is connected with the rainwater pipeline by a first branch rainwater pipeline, and a first stop valve is arranged on the first branch rainwater pipeline; the rainwater utilization regulation and storage tank is connected with the rainwater pipeline by a second branch rainwater pipeline, a second stop valve is arranged on the second branch rainwater pipeline, and a first quality sensor and a second quality sensor are arranged on the rainwater pipeline and are positioned on upstream sides of the initial rainwater regulation and storage tank and the rainwater utilization regulation and storage tank. The invention further discloses a control method implemented by the rainwater quality control regulation and storage system. The rainwater quality control regulation and storage system and the control method have the advantages that rainwater can be treated by the initial rainwater regulation and storage tank, so that pollution of the initial rainwater on water can be reduced to a great extent; later clean rainwater can be collected and utilized by the rainwater utilization regulation and storage tank.

The invention discloses a method for recovering waste heat of melting slag. The method comprises the following steps of injecting high-temperature melting slag into a heat recovery pool, mixing the melting slag with molten metal with low melting point in the heat recovery pool while quickly cooling the melting slag into solid furnace slag, wherein the melting slag and the molten metal with the low melting point are subject to quick heat transfer, besides, the solid furnace slag floats to form a scum layer, and scums are discontinuously or continuously discharged; absorbing the heat of the molten metal with the low melting point by a vaporization cooling device arranged in the heat recovery pool to vaporize liquid in a sealing pipeline of the vaporization cooling device; preserving the formed steam for recycling. According to the method for recovering the waste heat of the melting slag, provided by the invention, the problems of high power consumption, high heat recovery difficulty, low heat recovery efficiency, difficult utilization of the melting slag after heat recovery and the like existing in an air quenching method and a revolving cup method are solved.

The invention discloses a rainwater recycling system for sponge city overpass and a construction method of the rainwater recycling system. The rainwater recycling system comprises a rainwater collection device, rainwater pretreatment equipment and a water storage well, the rainwater collection device comprises a rainwater pipe and a collector, a water collection pump is mounted on the collector, and the rear end of the rainwater pipe is connected onto the water collection pump while the front end of the same is connected onto a deck of the overpass; the lower end of the collector is connected with a first guide pipe, the other end of the first guide pipe is connected with the rainwater pretreatment equipment, a diverter is mounted at the lower end of the rainwater pretreatment equipment, a second guide pipe is connected on the diverter and connected to the water storage well, a submerged pump is mounted in the water storage well, and a recycling pipe is connected on the submerged pump. An existing overpass draining pipeline is introduced into the collector, and rainwater is purified with the help of the rainwater pretreatment equipment, guided into the water storage well and then recycled through the recycling pipe, so that reasonable utilization of rainwater resources is realized, city water consumption pressure is relieved, the draining problem of the overpass is solved effectively, and city traffic is guaranteed.

The invention provides an ecological parking lot and a construction method thereof, which can be used in karst regions so as to reduce ecological damage and prevent stony desertification. The parkinglot comprises space linking taxiways, and a plurality of grass planting brick parking spaces positioned on the two sides of the space linking taxiways, wherein an ecological gully with top grids is arranged at the center of the space linking taxiways, the bottom of the ecological gully is communicated with a impounding reservoir arranged on one ends of the space linking taxiways, a green isolationzone is surrounded on the outer side of the plurality of grass planting brick parking spaces, and water in the reservoir is used for irrigating the green isolation zone. On the basis of not destructing the original ecological environment, the goals of absorbing automobile tail gas, protecting vehicles, recycling water resources, preventing stony desertification, and the like can be realized through the parking lot.

The invention discloses a water-saving irrigation method capable of reducing greenhouse gas emission of a rice field in a cold area and relates to the field of agricultural technologies and environment protection. According to the method, in all growth periods of rice, the root layer is irrigated with field water until the upper control limit of moisture is achieved, and after the rice field moisture reaches the lower control limit of moisture, irrigation is conducted to the upper limit of moisture again. It is proved through an experiment that compared with common basin irrigation on the ricefield, the water consumption of the method is reduced by about 290 millimeters, and the water-saving amplitude is increased by 35%. According to the method, the emission amount of N2O of the rice field is increased, but the emission amount of CH4 is greatly reduced, and compared with common basin irrigation, the GWP generated by the N2O and the CH4 is reduced by 34.25-46.12%.

The invention discloses a sponge type campus rain swage recycling method based on low impact development. By adopting effective entrapment way and late treatment facility, the campus space is reasonably utilized to improve the rainfall runoff volume control ability and provide a water gathering surface and a storage space; meanwhile, a sewage regeneration system is established by use of the underground space. The problem in draining rainwater in a campus can be solved, and a water source can be provided for the campus. The regeneration and reusing of rain sewage are realized while the drainage safety of the campus is ensured, thus the problems of water shortage and waterlogging in the campus are remarkably relieved, and overall ecological system of the campus can be recovered; through the self-cleaning ability of the natural ecological system, the ecological environment of the campus is improved, and a beautiful ecological campus is constructed. 80% or more of the annual rainfall and 85% or more of the annual sewage in the campus are recycled.

The invention discloses an ecological cycle treatment and utilization process of residual vegetables, wherein the comprises the following steps: collecting a large amount of residual vegetables generated in agriculture, and removing foreign matters such as plastic, ironware, sawdust, soil blocks, stones, paper scraps, mud roots and the like mixed in the residual vegetables and rotten and deteriorated parts; putting a part of the selected clean residual vegetables into a net chain bubble cleaning machine to wash away soil in the residual vegetables; crushing the cleaned residual vegetables intoa powdery or pasty material with the particle size of 3 cm or less by using a large hammer mill so as to enhance the flowability of the residual vegetables. A large amount of residual vegetables canbe quickly treated; the pollution to the environment is reduced; the treated residual vegetables do not generate secondary pollution; part of the residual vegetables are used for feed processing, squeezed residual vegetable residues are used for producing solid organic fertilizers and applied to farmlands, biogas slurry generated after residual vegetable juice fermentation serves as organic liquidfertilizers to be used for farmland irrigation, the requirements of the planting industry are met, meanwhile, the use amount of chemical fertilizers is reduced, the crop yield is increased, the cropquality is improved, and meanwhile biogas energy is generated by the process system.

The invention provides a treatment system for nuclear power plant radioactive waste liquid reuse. The treatment system comprises a technological drainage treatment sub-system, a chemical and ground drainage treatment sub-system and a service drainage treatment sub-system. The technological drainage treatment sub-system comprises a technological drainage collection unit, a technological drainage evaporation unit, a technological drainage ion exchange unit and a monitoring tank which are connected in series successively. The chemical and ground drainage treatment sub-system comprises a chemical drainage collection unit and a ground drainage collection unit and further comprises a chemical and ground drainage evaporation unit, a chemical and ground drainage ion exchange unit and a chemical and ground drainage reuse tank which are connected with the downstream sides of the chemical drainage collection unit and the ground drainage connection unit in series successively. The service drainage treatment sub-system comprises an ozone and ultraviolet light treatment unit, a precision treatment unit and a service drainage reuse tank, which are connected in series successively. The treatment system can realize drainage of treated waste liquid with higher tritium concentration of nuclear power plants and reuse of treated liquid waste having a lower tritium concentration or basically containing no tritium.

The invention relates to a purification system for sewage treatment. The purification system comprises a first sewage treatment reaction tank, a second sewage treatment reaction tank, a quick filtering tank, a carbon filtering tank and a nano-sewage clarifying tank, wherein a clean water accommodation tank of the first sewage treatment reaction tank is communicated with a tank body of the second sewage treatment reaction tank through a pipeline with a water pump, a clean water accommodation tank of the second sewage treatment reaction tank is communicated with a liquid inlet of the quick filtering tank, and a filter liquid outlet of the filtering tank is communicated with a liquid inlet of the carbon filtering tank; a lower sludge outlet of the tank body of the first sewage treatment reaction tank and a lower sludge outlet of the tank body of the second sewage treatment reaction tank are respectively communicated with the nano-sewage clarifying tank. The purification system has the advantages that the sewage and wastewater can be separately treated, the limitation by the address selection of a sewage treatment factory is avoided, the cost is low, the separation effect is good, andthe good treatment effect is guaranteed; the treatment and purification functions are integrated, the pollution-free treatment is not simply performed on the sewage and wastewater, and the treated sewage and wastewater can be recycled as mixed water, so as to conserve the high-quality running water.

The invention relates to a low temperature dyeing technology for pure cotton fabrics. The technology which adopts low temperature preprocessing, polishing and low temperature dyeing one-bath process comprises the following steps: 1, carrying out low temperature preprocessing: adding a dyeing one-bath assistant to a dye solution, adjusting the temperature to 40-60DEG C, and continuously reacting for 15-30min; 2, polishing: adjusting the temperature to 35-60DEG C and the pH value to 5.5-6, adding a neutral polishing enzyme having a weight accounting for 0.2-0.5% of the weight of the fabrics, and continuously reacting for 15-20min; and 3, carrying out low temperature dyeing: adjusting the temperature to 35-45DEG C, sequentially adding a low temperature active dye, anhydrous sodium sulfate, soda ash and a caustic soda solution at a certain time interval, and reacting. The low temperature dyeing technology has the advantages of simple operation, small pollution, low energy consumption and the like.

The invention designs a forward osmosis water and fertilizer integrated irrigation system for a fertilizer draw solution based on RO concentrated water treatment. The forward osmosis water and fertilizer integrated irrigation system comprises an RO concentrated water circulation system, a fertilizer draw solution dilution system, a forward osmosis membrane assembly and an irrigation system, upper and lower threshold values of fertilizer and moisture required by crops in soil are set on the electric cabinet, when the fertilizer and moisture required by the crops are lower than the lower threshold value, the first electromagnetic valve and the second electromagnetic valve are opened at the same time, and the fertilizer and the moisture are automatically mixed in proportion according to the requirements of the crops and then irrigated to the roots of the crops; in the process, the RO concentrated water passes through a forward osmosis membrane assembly, pure water permeates into the fertilizer absorbing solution, and along with continuous circulation of the RO concentrated water and the fertilizer absorbing solution, the RO concentrated water is gradually concentrated, and the fertilizer absorbing solution is gradually diluted. The manufacturing process is simple, manpower and material resources are saved, RO concentrated water is recycled through a permeation method, on one hand, water pressure is relieved, and on the other hand, water and fertilizer are irrigated integrally to achieve the effect of saving water and fertilizer.

The invention discloses a method for recovering waste heat of melting slag. The method comprises the following steps of injecting high-temperature melting slag into a heat recovery pool, mixing the melting slag with molten metal with low melting point in the heat recovery pool while quickly cooling the melting slag into solid furnace slag, wherein the melting slag and the molten metal with the low melting point are subject to quick heat transfer, besides, the solid furnace slag floats to form a scum layer, and scums are discontinuously or continuously discharged; absorbing the heat of the molten metal with the low melting point by a vaporization cooling device arranged in the heat recovery pool to vaporize liquid in a sealing pipeline of the vaporization cooling device; preserving the formed steam for recycling. According to the method for recovering the waste heat of the melting slag, provided by the invention, the problems of high power consumption, high heat recovery difficulty, low heat recovery efficiency, difficult utilization of the melting slag after heat recovery and the like existing in an air quenching method and a revolving cup method are solved.

The invention relates to a treatment method of phenol-containing wastewater in the field of coal chemical industry. The method comprises the following steps: performing pretreatment, namely sequentially performing initiation reaction, polycondensation reaction, enhanced reaction and precipitation separation on the wastewater. Specifically, initiation reaction comprises adding an initiator into the high-concentration phenol-containing wastewater to enable the pH value to be 2-5, and maintaining the operation temperature to be 25-50 DEG C and the retention time to be 0.6-0.9 h; polycondensation reaction comprises adding a formaldehyde solution and an acid catalyst, adjusting the pH value of the wastewater, and carrying out substitution and phenolic aldehyde condensation polymerization; and enhanced reaction comprises adding an auxiliary agent into the wastewater subjected to the condensation polymerization reaction to perform the enhancing reaction. Oil removal, biochemical treatment, concentration treatment and the like are then carried out sequentially. According to the method, the wastewater containing phenol and chlorophenol can be effectively treated, the wastewater reaches the standard and is discharged, the recycling rate of the coal chemical industry wastewater can be increased, the water pressure of the coal chemical industry is relieved, the process is simple, the cost is low, and operation is stable, reliable and safe.

The invention discloses a water catching device and a water catching method for flue gas produced in a coal-fired power plant. The water catching device comprises a cyclone, wherein the side wall of the cyclone is provided with an air inlet tube; an exhaust pipe is arranged at the upper end of the cyclone; a multi-layer cooling pipe network is arranged inside the cyclone; the cooling pipe network is a pipeline formed by arranging a plurality of layers in a cross way; the inlet of the cooling pipe network is connected with a conveying device. The water catching device is a bypass system, has no influence on normal running of the power plant, is easy to manufacture, is convenient to arrange, and has low manufacturing and running costs; catching and recycling of moisture in the flue gas produced in the coal-fired power plant can be realized effectively, the aim of saving water is fulfilled, and the water consumption pressure in coal-fired power plants in areas lack of water such as western areas are relieved; meanwhile, air flowing into a boiler or a bypass for supplementing water is taken as a cooling medium, so that a part of heat can be recycled while water is caught, and energy is saved.

The invention discloses a flood water regulation and storage-rainwater reuse system in a sponge city. The flood water regulation and storage-rainwater reuse system in the sponge city comprises a rainwater reuse system and a flood water regulation and storage system. Aiming at the insufficiency of the prior art, a set of comprehensive rainwater processing system which is capable of regulating and storing flood water and reusing the rainwater at the same time is designed. The flood water storage system can be started in a proper time according to the amount of rainfall, the flood relief effect is obvious, and the problems that the city is bound to suffer waterlogging when it rains and the interval between drought and flood is very short are solved. The rainwater reuse system is combined with buildings of the sponge city, devices for collecting the rainwater are built on the buildings, after a simple purification process, the rainwater can have various functions, such as toilet flushing, floor moping, afforestation, artificial fountains, industrial water and the like, thus the reasonable utilization of rainwater resources is achieved, and the municipal water using stress is relieved.

The invention provides a rainwater recycling device for a building body, relates to a rainwater recycling device, and particularly relates to a rainwater recycling device for a building body. The invention aims to solve the problem that rainwater needs to be recycled due to high urban water pressure. The rainwater recycling device comprises a rainwater collecting tank, a main pipeline, an anti-overflow pipeline, an overflow valve, a rain shielding mechanism and a plurality of indoor water storage mechanisms, wherein the rainwater collecting tank is fixedly arranged at the top of the building body; an inlet of the main pipeline is connected with a water outlet of the rainwater collecting tank; one indoor water storage mechanism is arranged in each resident room in the building body; an inlet of each indoor water storage mechanism is connected with an outlet of the main pipeline through a pipeline; an inlet of the anti-overflow pipeline is connected with an overflow port of the rainwatercollecting tank; the overflow valve is arranged on the anti-overflow pipeline; and the rain shielding mechanism is arranged on a notch of the rainwater collecting tank. The invention belongs to the field of urban buildings.

The invention discloses an initial rainwater collecting pool with a later rainwater automatic discarding function, and belongs to the field of rainwater treatment. The initial rainwater collecting pool comprises an initial rainwater collecting pool body, wherein the initial rainwater collecting pool body comprises a collecting pool main body, and a drainage assembly is connected to one side of thecollecting pool main body and comprises a drainage base element connected with the collecting pool main body; the top surface of the drainage base element is flush with the top surface of the collecting pool main body, the drainage base element is provided with a drainage channel which is horizontally arranged and communicates with the collecting pool main body, and a gap is formed between the bottom surface of the drainage channel and the top surface of the collecting pool main body; and a trash rack is arranged at the communication position of the collecting pool main body and the drainagechannel, and a drainage through groove communicating with the drainage channel is formed in the side surface of the drainage base element. According to the invention, the dilution effect of the laterrainwater on initial rainwater is reduced, the sedimentation rate of pollutants in the rainwater is improved, the initial rainwater and the later rainwater are efficiently collected and purified, theproblem of runoff pollution of the rainwater to cities is solved, and the initial rainwater collecting pool can be applied to the construction of sponge cities on a large scale and has the characteristic of good compatibility.

The invention provides a rainwater recycling device for a building body, relates to a rainwater recycling device, and particularly relates to a rainwater recycling device for a building body. The invention aims to solve the problem that rainwater needs to be recycled due to high urban water pressure. The rainwater recycling device comprises a rainwater collecting tank, a main pipeline, an anti-overflow pipeline, an overflow valve, a rain shielding mechanism and a plurality of indoor water storage mechanisms, wherein the rainwater collecting tank is fixedly arranged at the top of the building body; an inlet of the main pipeline is connected with a water outlet of the rainwater collecting tank; one indoor water storage mechanism is arranged in each resident room in the building body; an inlet of each indoor water storage mechanism is connected with an outlet of the main pipeline through a pipeline; an inlet of the anti-overflow pipeline is connected with an overflow port of the rainwatercollecting tank; the overflow valve is arranged on the anti-overflow pipeline; and the rain shielding mechanism is arranged on a notch of the rainwater collecting tank. The invention belongs to the field of urban buildings.

The invention provides a high-altitude water taking device which comprises an unmanned aerial vehicle, a storage bin, an air inducing unit, a water absorption unit, a heating unit, a refrigerating unit and a condensation bin, the unmanned aerial vehicle is provided with a containing cavity, and the containing cavity is provided with a ventilation opening and a water passing opening; the storage bin is arranged in the containing cavity, an air inlet, an air outlet and a water vapor outlet are formed in the storage bin, and the air inlet and the air outlet communicate with the ventilation opening; the air inducing unit is communicated with the air inlet and / or the air outlet; the water absorption unit is arranged in the storage bin; the heating unit is used for heating the water absorption unit; the condensation bin is arranged in the containing cavity and provided with a water vapor inlet communicated with the water vapor outlet and a water outlet, the water outlet is communicated with the water passing opening, and the condensation bin is used for receiving liquid water formed through condensation of the refrigeration unit. According to the high-altitude water taking device, high-altitude water vapor in a desert area is converted into liquid water, the liquid water is conveyed to the ground, and the problem that water resources in the desert area are deficient is solved.

The invention discloses a rainwater recycling system for sponge city overpass and a construction method of the rainwater recycling system. The rainwater recycling system comprises a rainwater collection device, rainwater pretreatment equipment and a water storage well, the rainwater collection device comprises a rainwater pipe and a collector, a water collection pump is mounted on the collector, and the rear end of the rainwater pipe is connected onto the water collection pump while the front end of the same is connected onto a deck of the overpass; the lower end of the collector is connected with a first guide pipe, the other end of the first guide pipe is connected with the rainwater pretreatment equipment, a diverter is mounted at the lower end of the rainwater pretreatment equipment, a second guide pipe is connected on the diverter and connected to the water storage well, a submerged pump is mounted in the water storage well, and a recycling pipe is connected on the submerged pump. An existing overpass draining pipeline is introduced into the collector, and rainwater is purified with the help of the rainwater pretreatment equipment, guided into the water storage well and then recycled through the recycling pipe, so that reasonable utilization of rainwater resources is realized, city water consumption pressure is relieved, the draining problem of the overpass is solved effectively, and city traffic is guaranteed.

The invention discloses a mobile dental integrated therapy apparatus, comprising a tank body; a bottom plate is mounted at the bottom of the tank body; a roll shaft is mounted on the left of a dustproof cover; the upper portion of the dustproof cover is provided with a handle; a hook is mounted on one side of the tank body; a battery is mounted at the inner bottom of the tank body; a water tank is fixed in the center of the tank body through a support plate; the inner part of the tank body close to the wat4er tank is fixedly provided with a sterilizing liquid storage tank through a support plate, and a drawer is arranged in a tool channel. As the mobile tank body is used herein, the defect that the mobile dental therapy apparatus is fixed and immovable during use is overcome, and the applicable range of the apparatus is widened; as an activated carbon filter is used to recycle leaking water, water resources are saved, and water consumption burden is relieved.

The invention discloses a solar cell panel cleaning and dust removing device. The device comprises an induction type air water taking module, a water tank, a water pump and a cleaning module. The induction type air water taking module communicates with a water inlet of the water tank through a pipeline, and a water outlet of the water tank communicates with the cleaning module through the water pump. Water in air is collected into the water tank through the induction type air water taking module to be stored, the water pump works to pump water in the water tank to the cleaning module, and the cleaning module sprays water to a solar cell panel to complete dust removing and cleaning work. The device further comprises a PLC, and the water pump and a drive and induction component in the induction type air water taking module are electrically connected with the PLC. The device is ingenious in conception, simple in structure, easy to install and low in production cost; and self-water production and self-cleaning are achieved, and therefore manpower, material resources and cleaning cost are greatly saved, the water pressure in arid areas is effectively relieved, and the working efficiency of the solar cell panel is effectively improved through regular cleaning.

A high-strength modular combined regulating and storing tank comprises multiple modular unit regulating and storing tanks assembled into a whole. Each unit regulating and storing tank is prefabricatedby reinforced concrete, and appearance of a tank body of each unit regulating and storing tank is right-prism-shaped. The high-strength modular combined regulating and storing tank has compressive strength exceeding more than 15tons; regulating and storing module units are convenient to assemble, and modules can be designed in different sizes according to actual conditions; space capacity is high, rainwater enters the regulating and storing tank after flow discarding and filtering, sufficient aerobic activity space can be provided, and breeding of anaerobic bacteria having an impact on waterquality caused by stagnation of the rainwater is avoided; precious ground space is not occupied, and the modules are assembled underground, so that ground landscape effect is unaffected; the regulating and storing tank can constantly collect the rainwater, provide a lot of water for landscaping irrigation, relieve water consumption pressure and rainwater flood disaster of city areas, can be put under buildings, plazas and greenbelts, and can be designed in different sizes according to needs, thereby being capable of effectively saving land space.

The invention discloses a domestic device for using secondary water to flush a closestool. The domestic device comprises a shower room base water tank, a wall-hanging water tank and a water pump, a fallen water opening which is used for collecting shower water is formed in the upper portion of the shower room base water tank, a floating ball A and a floating-ball-type magnetic switch A which is connected with the floating ball A are arranged on the shower room base water tank, a water outlet pipe is arranged at the lower portion of the shower room base water tank and is connected with an inletof the water pump, an outlet of the water pump is communicated with the upper portion of the wall-hanging water tank through a water inlet pipe, a floating ball B and a floating-ball-type magnetic switch B which is connected with the floating ball B are arranged on the wall-hanging water tank, a closestool water inlet pipe which is communicated with a closestool water tank is arranged at the lower portion of the wall-hanging water tank, the shower room base water tank is further connected with a washing machine drainage pipe, and high-water-level limiting normally-closed contacts of the floating-ball-type magnetic switch A are in series connection with high-water-level limiting normally-opened contacts of the floating-ball-type magnetic switch B. By means of the domestic device, domesticwastewater can be effectively utilized, and the water can be greatly saved.