144results about How to "Reduce secondary pollution" patented technology

The invention relates to an efficient catalytic composite nano-capture deep deodorization method for waste gas with complex components, which is applied to the field of purification of waste gas with complex components, and comprises the steps of pretreatment of gas inlet, catalytic enrichment, nano-liquid capture and the like, and through the synergistic effect of a catalytic enrichment coupling reactor, an atomizing nozzle, nano-liquid and an intelligent deodorization control system, the deodorization effect of the waste gas with complex components is improved. VOCs and odor molecules in the malodorous gas can be efficiently and rapidly removed, the human body is free of feeling, the whole deodorization process is carried out under the normal temperature condition, the investment and operation cost for malodorous gas treatment is remarkably reduced, and the deodorization method has the advantages of being high in safety, low in operation cost, small in occupied space, low in secondary pollution and the like and is suitable for popularization and application. According to the method, the practical application effect of malodorous gas treatment is effectively improved, the safety of discharged gas is ensured by evaluating the treated gas, and the application effect and quality of the catalytic enrichment coupling reactor and the nano liquid can be monitored and adjusted in real time, so that the intelligent level of the malodorous gas treatment process is enhanced.

The invention relates to a process for gradient extraction of seaweed protein, algin and fucoidin in brown algae. The invention relates to a process for extracting seaweed protein, algin and fucoidin in brown algae, which comprises the following steps: carrying out superfine grinding on seaweed, adding water for extraction, filtering and separating to obtain water extraction filtrate, repeatedly dissolving the water extraction filtrate in the next batch of superfine ground seaweed, and circulating for 7 times to obtain saturated or supersaturated water extraction filtrate; adjusting the pH value of the water extraction filtrate to be acidic, and filtering and separating through a micro-filtration membrane to obtain seaweed protein and first filtrate; adding calcium chloride into the first filtrate, and settling to obtain algin and supernate; filtering the supernate through a polyethersulfone composite membrane to obtain a fucoidin concentrated solution; and carrying out spray drying on the concentrated solution to obtain fucoidin powder. The method solves the problem that other functional components are wasted due to the fact that only a single component can be extracted in an existing brown algae functional component extraction method, and also solves the problems of secondary pollution, poor product quality and high cost in an existing extraction method.

The invention discloses a process for treating rural domestic sewage by using an improved A2 / O + MBBR (Moving Bed Biofilm Reactor), and relates to the technical field of sewage treatment. The method comprises the steps of S1, initial-stage treatment, S2, reflux treatment and S3, tail-stage treatment. The rural domestic sewage is treated by an improved A2 / O + MBBR nitrogen and phosphorus removal process, and the rural domestic sewage is distributed into each tank by adopting a sectional water inlet technology, so that an alternate multi-stage facultative / aerobic environment is formed, and the biological nitrogen and phosphorus removal effect is enhanced; the improved A2 / O + MBBR process has the advantages of high nitrogen and phosphorus removal effect, low investment and operation cost, convenience in operation and management and the like; all returned sludge enters the pre-denitration tank and enters the front-section anaerobic tank and the front-section anoxic tank, a sludge concentration gradient from high to low is formed in each tank, and the average sludge concentration in each tank is increased and the hydraulic load of the sedimentation tank is not changed under the condition that the effluent sludge concentration is not increased, so that the proliferation speed of phosphorus-accumulating bacteria and nitrifying bacteria is accelerated; the proportion in the total amount of the activated sludge is increased, so that the nitrogen and phosphorus removal effect is improved.

The ozone membrane and ozone ultraviolet combined catalytic oxidation device comprises a base, the two sides of the upper portion of the base are connected with the two sides of the lower portion of a lower shell in a fastened mode through matching of fastening bolts and nuts, and the upper portion of the lower shell is integrally connected with an upper shell. The two sides of the upper portion of the upper shell are in fastened connection with the two sides of the end cover through cooperation of fastening bolts and nuts, a center pipe is longitudinally arranged in the center of the interior of the lower shell and the upper shell after the lower shell and the upper shell are integrally connected, a PTFE hollow fiber membrane is arranged on the outer portion of the center pipe in the circumferential direction, and casting areas are arranged at the upper end and the lower end of the PTFE hollow fiber membrane correspondingly. An ozone channel is arranged between every two adjacent PTFE hollow fiber membranes, a membrane oxidation gas-water mixing outlet is formed in the corresponding position of the central pipe below the PTFE hollow fiber membranes, an ultraviolet generator is arranged above the central position in the central pipe, and the top end of the ultraviolet generator penetrates through an end cover and is fixed on the end cover through a fastening bolt; and the top of the ultraviolet generator is connected with an ultraviolet generator power supply.

A sundry blocking and collecting device comprises a sundry collecting assembly installed on a dust removal pipeline, the sundry collecting assembly comprises a sundry collector, and a first pneumatic valve connected with the dust removal pipeline is installed on a dusty air inlet of the sundry collector; a second pneumatic valve connected with the dust removal pipeline is mounted on the dusty air outlet; an impurity outlet is formed in the end close to the dust-containing air inlet; the impurity outlet is connected with a filter material barrel, and an impurity inlet of the filter material barrel is provided with a third pneumatic valve; a fourth pneumatic valve is mounted at an impurity outlet of the filter drum; an air cannon blowback inlet is formed in the end close to the dusty air outlet, an air cannon blowback valve is installed on the air cannon blowback inlet, and the air cannon blowback valve is connected with an air cannon; and a sundry blocking component is arranged below the air cannon reverse blowing inlet in the sundry collector. According to the utility model, the impurities in the raw material ore in the mine production process are effectively intercepted and collected, the performance of the dust remover is improved, the service life of the dust remover is prolonged, the maintenance cost is reduced, the environmental pollution is reduced, and the dust remover has obvious environmental protection benefits.

The invention discloses a method for degrading bisphenol organic pollutants. The method comprises a preparation method of ferromanganese spinel with a rare earth doped particle structure and an application of the ferromanganese spinel and peroxymonosulfate in degrading the bisphenol organic pollutants by cooperating with a hydrodynamic cavitation technology. Mainly relates to combination of a Fenton-like oxidation technology and a hydrodynamic cavitation technology for activating peroxymonosulfate by using ferromanganese spinel with a rare earth doped particle structure. Comprising the following steps: activating persulfate through transfer electrons between surface defects and rare earth elements of prepared ferromanganese spinel with a rare earth doped particle structure under a hydrodynamic cavitation condition, so as to generate a large number of superoxide free radicals to degrade bisphenol organic pollutants. A rich gas-liquid interface provided by nano bubbles generated by hydrodynamic cavitation is combined, and the contact opportunity of active oxygen species and pollutant molecules is increased, so that the reaction rate and the degradation efficiency are improved. According to the method, efficient degradation of bisphenol organic pollutants is realized, and a green and efficient solution is provided for water treatment.

The invention discloses a method for determining control parameters of an ammonia-coal mixed combustion system and a related device and system, and relates to the field of ammonia-coal mixed combustion systems.The method comprises the steps that the actual value of the ammonia input flow, the actual value of the air input flow, the actual value of the nitrogen oxide content and the actual value of the ammonia remaining amount are collected; utilizing the mechanism model to obtain a predicted value of the nitrogen oxide content and a predicted value of the residual ammonia gas; determining the range of the nitrogen oxide content and the range of the residual amount of ammonia gas; training the neural network model by using the range of the nitrogen oxide content and the range of the residual ammonia gas to obtain an optimal excess air coefficient determined by the neural network model; obtaining a target ammonia gas input flow and a target air input flow corresponding to the optimal excess air coefficient; and determining the target ammonia gas input flow and the target air input flow as control parameters of the ammonia-coal mixed combustion system. The control parameters of the ammonia-coal mixed combustion system can be quickly and accurately determined, and emission of nitric oxide and ammonia gas is reduced.

This application relates to an air handling device and an air purification device. The air handling device includes a first rotating assembly for connecting to a pre-filter assembly, thereby driving the pre-filter assembly to rotate. A cleaning mechanism is located around the pre-filter assembly. When the pre-filter assembly rotates, the cleaning mechanism acts on the surface of the pre-filter assembly to remove contaminants from its surface. The cleaning mechanism includes a scraper and a roller brush assembly, which are arranged adjacent to each other. Contaminants on the surface of the pre-filter assembly are scraped off by the scraper and carried away by the roller brush assembly. This air handling device not only removes contaminants from the surface of the pre-filter assembly but also carries them away, greatly reducing the possibility of secondary pollution caused by contaminants scraped from the surface of the pre-filter assembly and further improving the purification effect.

The application relates to the field of chemical material preparation, and particularly discloses a high-purity silicon nitride powder and a preparation method thereof. The preparation method of the high-purity silicon nitride powder is as follows: 30-40 parts of silicon dioxide nano particles are mixed with 12-40 parts of carbon black to obtain a blend by adding deionized water, the blend is stirred, and the blend is dried at 60-65 DEG C to obtain a silicon-carbon precursor; nitrogen is introduced into the carbon-silicon precursor, the temperature is increased to 1350-1500 DEG C, and the temperature is kept constant to obtain a crude product; ammonia is continuously introduced into the crude product, the temperature is kept constant at 1300-1400 DEG C to obtain a first purification product; the first purification product is cooled to 600-650 DEG C, oxygen is introduced, and the temperature is kept constant to obtain a second purification product; and the second purification product is cooled to obtain the product. The preparation method of the high-purity silicon nitride powder can prepare high-purity silicon nitride powder with a purity of 99.65% or above.

The utility model relates to the technical field of municipal engineering and robot technology intersection, especially a kind of self-propelled dredging robot of municipal sewer pipeline inner wall.The utility model provides a kind of self-propelled dredging robot of municipal sewer pipeline inner wall, including frame, track module and electric telescopic rod etc., two track modules are slidably installed in the left and right sides of frame, track module is all arranged obliquely, two electric telescopic rods are installed in the left and right sides of frame, and the telescopic end of electric telescopic rod is connected with the track module that is close to each other.The utility model provides walking power source by track module, significantly enhances the passing capacity of equipment whole, so that it can adapt to a variety of complex terrain environment in pipeline, simultaneously, under the assistance of supporting wheel and electric push rod, ensure that track is always close to inner wall, improve grip, and then effectively improve the operating stability and operation reliability of equipment.

The present application relates to the technical field of coke oven gas purification, and discloses a microcrystalline material adsorption equipment for coke oven gas purification, which comprises a feeder, a first rectifying tower, a second rectifying tower and a third rectifying tower connected in sequence; a pressurizing machine is used for pressurizing or cooling the coke oven gas during the adsorption process, which is beneficial to the adsorption of adsorbate on the adsorbent; a heater is used for heating the coke oven gas during the adsorption process, which is beneficial to the regeneration of the adsorbent and the process of adsorption separation cycle; the first rectifying tower is used for primary adsorption and fine removal, and active carbon spherical adsorbents are arranged in the first rectifying tower; the second rectifying tower is used for secondary adsorption and fine removal, and iron oxide adsorbents are arranged in the first rectifying tower; the third rectifying tower is used for tertiary adsorption and fine removal, and hydrophobic microcrystalline material adsorbents are arranged in the third rectifying tower. The present application has the advantages of adopting multiple adsorption components to cooperate with graded adsorption, and adopting heating adsorption and pressure swing adsorption to improve the adsorption and regeneration effect on coke oven gas.

The utility model discloses a kind of hydraulic cavitation reinforced cement sand cyclone separation devices, including hydraulic cavitation pipe, feed assembly and cyclone separation component;One end of the hydraulic cavitation pipe is connected with the feed assembly, and the other end is connected with the cyclone separation component. The feed assembly includes silt mixed liquid inlet pipe, the silt mixed liquid inlet pipe is connected with the hydraulic cavitation pipe, and inlet valve is connected on the silt mixed liquid inlet pipe. The feed assembly further includes air compressor, and the air compressor output end is connected with the hydraulic cavitation pipe by first pipeline. The cyclone separation component includes cyclone separator, the inlet of the cyclone separator is connected with the hydraulic cavitation pipe by second pipeline, and the lower end of the cyclone separator is connected with sludge discharge valve, and the utility model aims at overcoming the defects of the prior art to provide a kind of hydraulic cavitation reinforced cement sand cyclone separation device, improve the recycling rate of sand particle.

The invention relates to the technical field of appearance detection, in particular to multi-channel appearance detection equipment and a detection process, a feeding mechanism is used for receiving products and conveying the products to an integration runner, the products are conveyed from the feeding mechanism to a positioning mechanism through an integration module, the products are neatened through a first neatening assembly, and the products are neatened through a second neatening assembly; products are overturned through the first overturning mechanism, the products are conveyed to the first detection mechanism through the first robot for primary detection, the products are conveyed to the second overturning mechanism after detection, the products are conveyed to the second detection mechanism through the second robot, and secondary detection is conducted after the products are arranged in order. Through the arrangement of the feeding mechanism and the integration module, products of a working procedure which is not matched with the position of a flow channel of the first detection mechanism can be conveyed to the first detection mechanism, positioning and detection of the multiple products can be achieved, then the products are overturned through cooperation of the first overturning mechanism and the first robot, and the product quality is improved. Products with different bending degrees and sizes can be conveniently detected.

The utility model relates to chemical engineering technical field, concretely is a kind of separation device of liquid phase ammonia-containing mixed product, including separation tank, filter box, filter screen, mobile device and filter screen cleaning device, the top of separation tank is installed with connecting pipe, the outer wall of connecting pipe is installed with pump body, the top of connecting pipe is installed with the filter box, the top of filter box is installed with liquid inlet pipe, the inside of filter box is installed with the filter screen, the lateral wall of filter box is installed with collection cover by the mobile device, pass through mobile device and drive collection cover synchronous movement, realize the cleaning of each orientation of filter screen, adopt "filter screen+nanofiltration membrane" two-stage separation mechanism, first rough then fine, improve overall separation efficiency, filter screen cleaning device and mobile collection cover work cooperatively, realize on-line automatic cleaning, the design of filter screen cleaning device makes filter screen can keep clean state, improve the reliability of overall equipment.

The utility model provides a combustion nozzle for mixing various waste gases, and belongs to the field of industrial waste gas emission. And the problem of insufficient combustion caused by non-uniform mixing of various waste gases is solved. The multi-hole nozzle comprises a nozzle shell, a multi-hole outer pipe, a multi-hole inner pipe, a fan blade pipe, a vacuum generator and a combustion air gun. An air inlet is formed in the side wall of the nozzle shell; a porous outer pipe and a porous inner pipe are arranged in the nozzle shell, the porous outer pipe is arranged on the outer side of the porous inner pipe, and the top of the porous outer pipe and the top of the porous inner pipe are both connected with the shell cover plate; a spraying opening is formed in the bottom of the nozzle shell; the nozzle shell is connected with a furnace end through a spraying opening, and a negative pressure chamber and a waste gas mixing chamber are sequentially arranged in the furnace end in the gas circulation direction. An air gun connector is arranged outside the furnace end; a fan blade pipe is arranged on the outer side of the porous inner pipe, and a plurality of inclined partition plates are arranged in the fan blade pipe in the circumferential direction at equal intervals. The waste gas mixing device is mainly used for fully mixing various waste gases.

The invention relates to a cleaning agent used after SiC substrate grinding and a preparation method thereof, and relates to the field of semiconductor cleaning agents, and the cleaning agent is prepared from the following raw materials by mass: 4-8% of an anionic surfactant, 2-6% of a nonionic surfactant, 2-6% of a cleaning auxiliary agent, 8-12% of sodium hydroxide, 2-4% of a bio-based modified antistatic agent, and the balance of water. The preparation method comprises the following steps: heating water, adding sodium hydroxide, stirring, adding the cleaning aid, stirring, adding the premixed anionic surfactant and nonionic surfactant, stirring, adding the bio-based modified antistatic agent, stirring, cooling, and filtering to obtain the cleaning agent for grinding the SiC substrate. The cleaning agent has a good cleaning effect, can effectively remove impurities after grinding, and meets the requirement of the semiconductor industry for high-quality cleaning of SiC wafers.

This invention discloses a high-efficiency separation device and method for oily sludge. The device includes a shell, within which, from top to bottom, are sequentially arranged interconnected strong mixing and dispersion unit, thermal vibration polymerization unit, and three-phase separation unit, respectively used for primary demulsification of strong mixing and dispersion, secondary demulsification of thermal vibration polymerization, and three-phase separation of oily sludge. By integrating the strong mixing and dispersion unit, thermal vibration polymerization unit, and three-phase separation unit into a single device, this invention efficiently solves the technical problem of difficult efficient separation of oily sludge in the prior art. It features small footprint, compact design, low maintenance cost, stable and reliable operation, strong adaptability, low secondary pollution, and high separation efficiency.

The invention relates to the technical field of ceramic part cleaning, in particular to a cleaning device and method for high-cleanliness ceramic parts, the cleaning device comprises a cleaning box and a sealing cover hinged to the cleaning box, and a semi-enclosed electric heating wire is arranged on the side, away from a control panel, in the cleaning box; the cleaning assembly is arranged on the rotating frame, and the cleaning assembly comprises a first cleaning cavity and a second cleaning cavity which are located on the rotating frame; and the switching assembly is arranged below the rotating frame, and the switching assembly comprises a driving module and a placing module. Compared with the prior art, the placement module is forced to form a stable inclination angle when moving to the warping plate, and in cooperation with inclined jet flow of the second water outlet nozzle, cleaning liquid sweeps the arc-shaped outer surface and the side wall / transition fillet area at a more appropriate incidence angle; meanwhile, the inclined posture is beneficial to rapid discharge of a liquid film, and the common accumulated liquid, water pocket and water mark residual risks caused by horizontal placement are reduced.

The embodiment of the present application provides a COD prediction method, device and terminal, wherein the COD prediction method includes: obtaining the current environment vector of the water to be tested and the historical environment vector of the prediction model pool; calculating multiple cosine similarities based on the current environment vector and the historical environment vector; determining the maximum similarity based on the multiple cosine similarities; determining the COD prediction model based on the maximum similarity; the COD prediction model is the first prediction model corresponding to the first historical environment vector with the maximum similarity calculated in the prediction model pool, or the second prediction model obtained by updating the first prediction model based on the current environment vector; outputting COD data based on the COD prediction model. The COD prediction method provided by the embodiment of the present application can improve the accuracy of predicting COD.

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

The invention belongs to the technical field of gas treatment, and particularly discloses an advanced treatment process of low-concentration gas in an integrated circuit production process, which comprises the following steps: efficiently and deeply purifying ppm-level propylene glycol methyl ether acetate, isopropanol, methylbenzene, butanone and other organic gases to ppb level through a catalytic oxidation treatment system; the technical problems of high cost, low mineralization rate, long time consumption, low purification degree and easy generation of secondary pollution when the traditional treatment process is used for treating low-concentration gas are effectively solved. The process aims at treatment of low-concentration industrial gas in the integrated circuit production process, high-energy-consumption processes such as concentration are not needed, the degradation rate of direct gas treatment is increased to 99% or above, and the mineralization rate is increased to 95% or above.

This invention discloses a method for the biological drying of sludge, comprising the following steps: baking biomass materials, mixing the resulting baked product with sludge, biochar materials, and a conditioner for biological drying, thereby completing the sludge drying process. In this invention, by biologically drying the mixture of baked product, sludge, biochar materials, and conditioner, not only can the self-generated heat within the system be used to effectively dewater the sludge in a very short time, but the bioavailability of the microbial carbon source can also be improved, effectively reducing the generation of polluting gases. This method can effectively reduce the emission of polluting gases while achieving rapid dewatering. It has advantages such as simple process, low treatment cost, low energy consumption, high drying efficiency, good dewatering effect, low polluting gas production, and low content of toxic and harmful components in the dried product. It can solve the problems of biomass resource waste and pollution, achieve sludge reduction and resource utilization, and has high returns and good application prospects.

The application provides a raw material water tank pressure balance and foul gas treatment coupling system and method, and relates to the technical field of petroleum chemical industry.The system comprises a raw material water tank, a pressure detection and control system, a steam jet unit, and a foul gas treatment unit.The pressure detection and control system comprises a pressure transmitter arranged on the top of the raw material water tank.The steam jet unit comprises a steam jet and a steam pipeline.The suction inlet of the steam jet is connected with the gas phase space of the raw material water tank through the pipeline, and the power inlet of the steam jet is connected with the steam pipeline.The gas inlet of the foul gas treatment unit is connected with the outlet of the steam jet.The pressure transmitter is connected with the steam jet unit, and is used for starting the steam jet when detecting that the tank top pressure of the raw material water tank is higher than the set upper limit value, so as to suck, pressurize and seal the gas in the raw material water tank and transport the gas to the foul gas treatment unit.The method comprises pressure intelligent balance, gas directional transfer and foul gas cooperative purification, and is used for realizing clean and standard emission of tail gas.

The application discloses a kit based on gravity-driven liquid flow, comprising a box body, a liquid storage area and a reaction area arranged from top to bottom in the box body, the liquid storage area comprising a liquid flow channel and a plurality of liquid storage rods arranged on the liquid flow channel, the liquid storage rods storing liquid, the liquid storage rods being provided with liquid flow holes, the liquid storage rods being capable of sliding on the liquid storage area so that the liquid flow holes are communicated with the liquid flow channel, the reaction area comprising a reaction chamber, the reaction chamber being communicated with the liquid flow channel, when the liquid flow holes are communicated with the liquid flow channel, the liquid can flow into the reaction chamber under the action of gravity, the lower end of the reaction area being provided with a waste liquid area and an amplification area, the reaction area being provided with an isolation column at a connecting end of the waste liquid area and the amplification area, the isolation column being provided with a communication hole, the isolation column being capable of sliding on the reaction area so that the communication hole communicates the reaction area with the waste liquid area or the amplification area, so that the liquid in the reaction area flows to the waste liquid area or the amplification area under the action of gravity.

The application discloses a side brush mechanism and a cleaning device. The side brush mechanism comprises a gear box assembly and a cleaning assembly. The gear box assembly comprises a gear box shell and a rotating driving part connected with the gear box shell. An end of the gear box shell away from the rotating driving part is provided with an abutting part. The cleaning assembly comprises a cleaning shell, a floating part, an elastic part and a bristle part. The rotating driving part drives the cleaning shell to ascend or descend. The abutting part is abuttable against the floating part in a releasable mode. The elastic part is arranged on the cleaning shell. One end of the bristle part is abuttable against the floating part and the elastic part. The other end of the bristle part penetrates through the cleaning shell and extends out of the cleaning shell. In the side brush mechanism, the floating part acts on one end of the bristle part and makes the bristle part rotate during the ascending process of the cleaning assembly. The other end of the bristle part can be completely separated from the surface to be cleaned. Thus, the secondary pollution of the cleaning assembly to the surface to be cleaned is reduced, and the cleaning efficiency is improved.

This utility model discloses a wear-resistant slider processing device, specifically relating to the field of slider processing technology. It includes an operating table, a back plate fixedly connected to the upper rear side of the operating table, a top plate fixedly connected to the upper end of the back plate, a motor fixedly connected to the middle of the upper end of the operating table, and a turntable fixedly connected to the output end of the motor. The motor drives the turntable to rotate. A processing table is fixedly connected to the outer side of the turntable. Fixing mechanisms are symmetrically arranged on both sides of the upper end of the processing table, used to fix the slider during processing. This utility model achieves slider positioning by setting up a processing table in conjunction with fixing mechanisms. After drilling, the processing table switches positions, using magnetic suction columns to clean debris from the holes. A drive mechanism drives a scraper to rotate and clean debris, while a second scraper manually cleans debris from the bottom of the magnetic suction columns. This solves the problem that traditional negative pressure dust collection cannot remove debris from holes, reduces splashing and secondary pollution during processing, and not only improves production efficiency but also efficiently recovers debris.

The invention discloses a method for recovering lithium in a waste lithium iron phosphate positive electrode material leachate through homogeneous membrane electrodialysis, which belongs to the technical field of lithium resource recovery, and comprises the following steps: feeding the waste lithium iron phosphate positive electrode material leachate containing lithium ions and iron ions into a light chamber of a homogeneous membrane electrodialysis device to circularly flow, the method comprises the following steps: placing water in a concentrated chamber of a homogeneous membrane electrodialysis device to circularly flow, applying a potential difference to a homogeneous membrane under the action of a direct-current electric field, only allowing lithium ions to penetrate through the homogeneous membrane so as to realize selective separation of the lithium ions and iron ions, and obtaining a separated high-purity lithium-containing solution in the concentrated chamber of the homogeneous membrane electrodialysis device, the method provided by the invention can realize selective separation of lithium ions and iron ions in the leaching solution of the lithium iron phosphate positive electrode material, directly obtains the high-purity lithium-containing solution, is simple and convenient to operate, and is green and environment-friendly.

The utility model is suitable for silicon carbide membrane filtration technical field provides a kind of agentless self-flocculation silicon carbide membrane filtration device, it include: fixed seat, the fixed seat is equipped with reaction mechanism and water production tank;The reaction mechanism includes the reaction pool of being fixed on the fixed seat, the one side of the reaction pool is equipped with ladder, one end of the reaction pool is equipped with power supply, the power supply is connected and is equipped with electrode, the one side of the reaction pool is equipped with control electric box, the inside of the reaction pool is equipped with membrane box group, the outside of the reaction pool adjacent the membrane box group is equipped with driving assembly, the top of the reaction pool is equipped with mud scraping assembly, the bottom of the reaction pool is equipped with a plurality of groups of first discharge pipeline, by this, the utility model has the advantages that reagent dosage is less, sludge production is low;High degree of automation, convenient operation;Equipment integration degree is high, and floor area is small;Processing effect is more optimal, and special water quality is suitable;Environment-friendly strong advantage.

The utility model relates to the technical field of waste water crystallization treatment, and discloses a waste water heating, crystallizing and separating treatment device which comprises a crystallizing tank, a scraper blade is connected in the crystallizing tank through a rotating assembly, an electric heating tube is fixedly connected to the inner wall of the crystallizing tank, and an electromagnetic valve is fixedly connected to the lower side of the right end of the crystallizing tank. A first support is fixedly connected to the outer surface of the lower end of the crystallizing tank, a connecting pipe is fixedly connected to the outer surface of the top end of the crystallizing tank, a filter box is fixedly connected to the upper end of the connecting pipe, a box door is slidably connected to the right end of the filter box, and a filter plate is connected to the inner wall of the filter box through a linkage assembly. The top end of the filter box is fixedly connected with a water inlet pipe. According to the device, floating objects are intercepted through the filter plate, the hydraulic rod pushes the extrusion plate to clean and extrude the floating objects, blockage is prevented, and secondary pollution is reduced; the spiral scraper scrapes crystals on the inner wall of the crystallizing tank and conveys and collects the crystals, so that the process is simplified and the cleaning trouble is avoided.