23 results about "Membrane stack" patented technology

The utility model discloses a membrane stack with a self-cleaning device and electrodialysis equipment, and belongs to the field of electrodialysis equipment, and the membrane stack with the self-cleaning device comprises a membrane stack body, the positive water distribution plate and the negative water distribution plate are respectively propped against two sides of the membrane stack body; the spraying assembly comprises a grating plate, a water supply unit and a plurality of nozzles, the nozzles are connected to the periphery of the grating plate and all communicated with the water supply unit, the grating plate is located in the membrane stack body, and the water supply unit and the nozzles are all located outside the membrane stack body. The utility model has the technical effects that not only is the cleaning comprehensiveness good, but also the occupied space of the nozzle supporting part is small.

The invention relates to a device for deeply purifying waste amine liquid, a membrane stack of the device sequentially comprises a plurality of repeated membrane pool units and first cation exchange membranes from an anode plate to a cathode plate, and each membrane pool unit in the repeated membrane pool units comprises a second cation exchange membrane, a first anion exchange membrane and a second anion exchange membrane which are sequentially arranged, and ion exchange resin is filled between the first anion exchange membrane and the second anion exchange membrane. According to the device, the ion exchange resin is filled between the first anion exchange membrane and the second anion exchange membrane, and the first cation exchange membrane is arranged between the membrane pool unit and the cathode plate, so that electrodialysis and the ion exchange resin are organically coupled together, the respective advantages are fully exerted, and the defects in the electrodialysis and the ion exchange resin are complemented; and the effect of one plus one greater than two is achieved. The invention also relates to a method for deeply purifying the waste amine liquid.

The electrodialysis device comprises a membrane stack, electrode plates, fixing plates, a sealing assembly, a transparent baffle and a collecting assembly, the electrode plates are arranged on the two sides of the membrane stack, the fixing plates are arranged on the outer sides of the electrode plates, supports are arranged on the outer sides of the fixing plates, and the sealing assembly is arranged on the outer sides of the fixing plates. The sealing assembly comprises a fixing pipe arranged on the outer side of the fixing plate and an iron cover hinged to the fixing pipe, the transparent baffle is inserted into the fixing plate in a penetrating mode, and the collecting assembly comprises a collecting box arranged at the bottom of the transparent baffle, a discharging pipe arranged at the front end of the collecting box, a valve arranged on the discharging pipe and a liquid level sensor arranged on the inner side of the collecting box. By arranging the transparent baffle and the collecting assembly, under the condition that use of the electrodialysis device is not affected, the effect of conveniently collecting leaked liquid is achieved, whether leakage occurs or not can be monitored, meanwhile, the clamping assembly can be sealed through the sealing assembly, and the situation that the corrosion speed is increased due to the fact that dust and liquid make contact with the clamping assembly is avoided.

The application discloses a kind of high-efficiency energy storage system and method based on bipolar membrane electrodialysis, including multiple series setting bipolar membrane stack combination unit, electrode system, electrolyte circulation system, control system and auxiliary equipment.The application utilizes the water dissociation characteristics of bipolar membrane and the ion migration mechanism of electrodialysis, realizes the efficient storage and release of electric energy, is suitable for renewable energy storage, power grid peak shaving and distributed energy system and other fields, and significantly improves energy conversion efficiency, prolongs system life and reduces operating cost by optimizing membrane structure, improving system design and control strategy.

The invention belongs to the technical field of traditional Chinese medicine separation and purification, and discloses a method for separating caulis sinomenii alkaloid by a microfiltration-ultrafiltration-nanofiltration-electrodialysis integrated membrane technology. An ultrafiltration membrane electrodialysis device is adopted, the ultrafiltration membrane electrodialysis device comprises an anode plate, a cathode plate and a membrane stack arranged between the anode plate and the cathode plate, and the membrane stack is formed by connecting n groups of electrodialysis units in series, the device sequentially comprises an anode, an anode chamber, [a cation exchange membrane, an acid chamber, an anion exchange membrane, a feeding chamber, an ultrafiltration membrane and a product chamber] n, a cation exchange membrane, a cathode chamber and a cathode from the anode to the cathode. According to the method, the maximum recovery rate of sinomenine hydrochloride can reach 84.1%, the recovery rate of magnoflorine can reach 68.2%, the method is a simple and efficient multi-membrane integrated separation method with low energy consumption and small pollution, and a new thought is provided for separation and purification in the field of traditional Chinese medicine alkaloids.

The utility model discloses a quick connector, a membrane stack and an electrodialysis device, and belongs to the field of electrodialysis devices.The quick connector comprises a socket male head, a first matching groove is formed in one end of the socket male head, and a second matching groove is formed in the other end of the socket male head; one end of the socket female head is provided with a second matching groove and a third matching groove, and one end of the socket female head is sleeved outside one end of the socket male head, so that the first matching groove is communicated with the second matching groove and the third matching groove; the bolt comprises a main body part, and a first insertion rod and a second insertion rod which are connected with the main body part, a groove is formed in the first insertion rod, the first insertion rod is matched with the first matching groove and the second matching groove, and the second insertion rod is matched with the first matching groove and the third matching groove. The connecting structure has the technical effects that the connecting speed is high, and the connecting structure is not easy to loosen.

The present invention provides a high-efficiency multi-channel electrodialysis device for extracting lithium from salt lakes, which relates to the field of electrodialysis technology and includes a bottom plate, a support plate, and a base, wherein the upper side of the bottom plate is fixedly connected to the lower side of the support plate and the lower side of the base. The present invention stores a cation-rich solution inside four cylindrical shells, at which time the anode plate and the cathode ring are energized, and the folding membrane stack plays a role. The cations in the cation-rich solution pass through the folding membrane stack and enter the inner cavity of the folding membrane stack, and the anions are blocked in the gap between the folding membrane stack and the cylindrical shell. Since the folding membrane stack is in a folded and curved shape, the efficiency of selective permeability is improved when separating anions and cations. At the same time, the curved exchange membrane stack increases the area during the exchange of anions and cations, increases the exchange rate, and thus increases the production capacity of electrodialysis.

This invention relates to a method for temperature-differential enhanced bipolar membrane electrodialysis. A three-compartment bipolar membrane electrodialysis device is employed, wherein the membrane stack of the device is arranged sequentially in the order of cation exchange membrane – bipolar membrane – anion exchange membrane. Adjacent membranes are separated by partitions to form acid, salt, and alkali compartments. The electrode plates and the bipolar membranes on both sides of the membrane stack form two polar liquid compartments. Each compartment is connected to a corresponding container via a pump. Heating the alkali or acid solution establishes a temperature difference across the bipolar membrane, accelerating ion migration, increasing the water dissociation rate within the bipolar membrane, increasing the concentration of acid and alkali produced, improving current efficiency, and reducing energy consumption.

The application is an electrodialysis membrane stack with magnetic stirring partition, which can be applied to common electrodialysis, can realize separation of easy-settling colloidal solution, and mainly comprises the following: polar plate, polar chamber partition, common partition, magnetic stirring partition, diaphragm, magnetic stirring device, end plate and flow channel joint. The magnetic stirring partition of the electrodialysis device is attached with smooth magnetic needle, and can realize uniform rotation in limited space. The application can realize effective enrichment of existing low solubility materials in the electrodialysis device (because the materials will block the flow channel and chamber after crystallization), can solve the problem that the existing common electrodialysis is difficult to process the material liquid containing solid particles, can prevent the precipitation, can configure magnetic stirring to realize uniform and stable outflow of the materials, and can improve the material collection effect of the system.

The application provides an electrodialysis system, a control method and an electronic device. The control method comprises the following steps: detecting the running state of an electrodialysis membrane stack in real time, wherein the running state comprises a normal state and a blockage state; and switching the working mode of the electrodialysis membrane stack according to the running state, wherein the working mode comprises a first working mode and a second working mode, the first working mode is that the concentrated water chamber of the electrodialysis membrane stack is communicated with a concentrated water tank, and the fresh water chamber of the electrodialysis membrane stack is communicated with a fresh water tank, and the second working mode is that the fresh water tank is communicated with the fresh water chamber and the concentrated water chamber respectively. The application realizes online automatic cleaning during the running process of the electrodialysis membrane stack, effectively reduces the blockage phenomenon of the electrodialysis system, maintains the solute concentration of the circulating feed liquid of the concentrated water, and avoids the problem of reduced concentration effect of the concentrated water caused by the return of the cleaning feed liquid to the concentrated water.

The present invention discloses a bipolar membrane, an electrodialysis device, a preparation method, and applications. The bipolar membrane comprises a cation exchange membrane, an intermediate layer, and an anion exchange membrane stacked in sequence, wherein the intermediate layer comprises nitrogen-doped graphene oxide. The bipolar membrane exhibits high water dissociation efficiency, a high acid and base production rate, a low voltage required for the water dissociation process, and low energy consumption.

The utility model discloses an electrodialysis device which comprises a membrane stack assembly and a polar water tank, an anode chamber and a cathode chamber are respectively communicated with the polar water tank through a first liquid outlet pipe and a second liquid outlet pipe, the first liquid outlet pipe is provided with a first outlet for discharging liquid to the polar water tank, and the second liquid outlet pipe is provided with a second outlet for discharging liquid to the polar water tank. A liquid flow blocking device higher than the liquid level of the electrode liquid is arranged at the first outlet or the second outlet, the first outlet or the second outlet provided with the liquid flow blocking device is higher than the liquid level of the electrode liquid, and the liquid flow blocking device enables liquid flow between the first outlet and the second outlet to be discontinuous; when one of the first liquid outlet pipe and the second liquid outlet pipe flows back, the electrode liquid can be sprayed to the liquid flow blocking device, then the liquid flow blocking device can disperse the electrode liquid flowing back from the anode chamber or the cathode chamber, and an open circuit is formed between the dispersed liquid, so that the current of an electrodialysis membrane stack can be prevented from forming a loop through the electrode liquid, electric leakage is avoided, and the service life of the electrodialysis membrane stack is prolonged. And the current efficiency is improved.

The invention discloses an electrodialysis treatment process for coal chemical industry high-concentration brine, and relates to the technical field of water treatment.The electrodialysis treatment process comprises the steps that the coal chemical industry high-concentration brine to be treated is input into a pretreatment module to be treated; conveying the high-concentration brine treated by the pretreatment module to an electrodialysis membrane stack module for treatment through a pressure pump; in the operation process of the electrodialysis membrane stack module, the dynamic flow field management system monitors and regulates fluid dynamic conditions in real time; the enhanced membrane cleaning and regenerating system is used for cleaning and regenerating the electrodialysis membrane stack module; dilute chamber effluent and concentrated chamber effluent treated by the electrodialysis membrane stack module respectively enter a post-treatment and recycling module for deep purification and resource recovery; the whole process flow is subjected to comprehensive real-time monitoring, data analysis, fault diagnosis and optimization control by the central intelligent control system. The invention can realize efficient, stable and economic treatment of high-concentration brine, prolong the service life of the membrane, improve the desalination rate and flux, and ensure reliable operation.

The application discloses a device for treating high-salt organic wastewater by using a bipolar membrane electrodialysis, which comprises a membrane stack, a direct-current power supply and a circulating pipeline system. The membrane stack is provided with one anode plate and one cathode plate on two sides respectively, and is assembled by a bipolar membrane, a cation exchange membrane and an anion exchange membrane. The inside of the membrane stack is composed of an anode reaction compartment, an acid liquid compartment, a feed liquid desalination compartment, an alkali liquid compartment and a cathode reaction compartment. The bipolar membrane, the acid liquid compartment, the anion exchange membrane, the feed liquid desalination compartment, the cation exchange membrane and the alkali liquid compartment can form one or more repeating units in sequence. The feed liquid circulating pipeline is communicated with the anode reaction compartment, the feed liquid desalination compartment and the cathode reaction compartment respectively, the acid liquid circulating pipeline is communicated with the acid liquid compartment, and the alkali liquid circulating pipeline is communicated with the alkali liquid compartment. The device has a simplified structure and a low operation cost, can realize desalination, organic pollutant degradation and acid-alkali recovery simultaneously, and is especially suitable for treating medium and low COD high-salt organic wastewater.

The invention provides an electric membrane stack denitrification system, which relates to the field of wastewater treatment and comprises an electrolytic cell (100) consisting of an anode chamber (10), a to-be-purified chamber (20) and a cathode chamber (30), a selective permeable membrane (40) is arranged between the anode chamber (10) and the to-be-purified chamber (20), a preferential permeable membrane (50) is arranged between the to-be-purified chamber (20) and the cathode chamber (30), and the anode chamber (10) is communicated with the cathode chamber (30) through an external conduit (80); a composite modified titanium-based anode electrode (60) is arranged in the anode chamber (10), a modified stainless steel mesh cathode electrode (70) is arranged in the cathode chamber (30), and the anode electrode (60) and the cathode electrode (70) are electrically connected and located on the upper side of the electrolytic bath (100). According to the system, a three-chamber diaphragm structure is adopted, the characteristics of low conductivity, ammonia nitrogen enrichment and the like of the freshwater aquaculture wastewater are accurately matched, and rapid and efficient removal of ammonia nitrogen in the aquaculture wastewater is achieved.

This utility model discloses a highly integrated multifunctional electrodialysis device, including a frame body. The frame body houses an integrated water tank, membrane stack, power supply cabinet, intelligent control cabinet, pump, and heat exchanger. Each water tank is connected to a water circulation loop, and each water circulation loop includes an inlet pipe, a water tank, an outlet pipe, a pump, a heat exchanger, sensor components, and a membrane stack. The membrane stack is connected to the return port of the water tank to form a single-pipe circulation. The integrated water tank includes separate material tanks, alkali tanks, acid / concentrate tanks, and electrode liquid tanks. This utility model integrates an advanced control system and multiple sensors, achieving fully automated operation and greatly improving experimental efficiency and data accuracy. Remote monitoring further enhances the convenience and safety of operation.

The utility model relates to a diaphragm stacking type continuous cooling crystallizer which is provided with a crystallization kettle, the crystallization kettle comprises an upper kettle body, a lower kettle body and a middle kettle body, the middle kettle body comprises at least one connecting kettle, a feeding pipe is arranged on the upper kettle body, a discharging pipe is arranged on the lower kettle body, a driving motor is arranged on the upper kettle body, and a driving shaft is arranged in the crystallization kettle. Membrane frames are arranged in the upper kettle body, the connecting kettles and the lower kettle body, the membrane frames are installed on a driving shaft, jackets are arranged on the outer walls of the upper kettle body, the connecting kettles and the lower kettle body, first liquid inlet pipes and first liquid outlet pipes are arranged on the jackets, butt joint heat exchange flanges are arranged between the middle kettle body and the upper kettle body and between the connecting kettles, and the butt joint heat exchange flanges are connected with the connecting kettles. A heat exchange cavity is formed in the butt joint heat exchange flange, a second liquid inlet pipe and a second liquid outlet pipe are arranged on the butt joint heat exchange flange, the upper end of the middle kettle body is in sealed connection with the upper kettle body, the connecting kettles are in sealed connection, and the middle kettle body is in sealed connection with the lower kettle body. The utility model has the advantages of ingenious structure, better universality, convenience and practicability.

The utility model discloses an electrodialysis membrane stack cleaning device in the technical field of cleaning devices, which comprises a base, a water tank and a water pump, a plurality of supporting legs are fixedly connected to the lower end of the base, a water inlet pipe is arranged at the upper end of the water tank, the water tank and the water pump are both fixedly connected to the upper end of the base, and the water pump is connected to the water tank to reversely convey water to an electrodialysis membrane stack. And the water tank is connected with a filtering mechanism and a cleaning mechanism. The utility model has the advantages that water in the water tank is reversely guided into the electrodialysis membrane stack by utilizing the water pump to carry out back-flushing cleaning, and meanwhile, the circulating pipe is connected with the electrodialysis membrane stack, so that back-flushing water flows back to the box body, and the water is recycled. After solid impurities in water are filtered out and cleaned through the filtering mechanism, the water pump can continuously use water in the water tank to carry out backflushing cleaning and impurity cleaning on the electrodialysis membrane stack, water resources are saved, impurities accumulated on one side of the filtering piece can be lifted through the cleaning mechanism and then cleaned through the cleaning opening, and practicability is high.

The invention discloses a chlorate-salt water separation device and a separation method, which relate to the technical field of chlorate-salt water separation. The device comprises a pretreatment unit, an electrodialysis unit, and an evaporation separation unit; the evaporation separation unit is provided with a circulation pump; the electrodialysis unit is provided with a plurality of electrodialysis membrane stacks and a plurality of cleaning mechanisms; a first drive structure, a bidirectional screw device, and a cleaning box cooperate to control a cleaning seat to move back and forth; a conveyor belt structure, a cleaning belt, a first auxiliary roller, and a second auxiliary roller cooperate to enable a cleaning bar to clean the electrodialysis membrane stack; a gravity bar, a return spring, and a rotating member cooperate to adjust the direction of the cleaning bar, thereby improving the cleaning effect of the cleaning mechanism, eliminating the need to stop the electrodialysis unit to disassemble and clean the electrodialysis membrane stack, thereby improving the separation efficiency of the chlorate-salt water and reducing the labor intensity of workers.

The invention relates to an electrodialysis device and method for selectively synthesizing cobalt ferricyanate and efficiently extracting potassium and application. A membrane stack structure of the electrodialysis device sequentially comprises a first anion exchange membrane, a cation exchange membrane, a monovalent and divalent cation selective separation membrane and a second anion exchange membrane to form an anode chamber, a first raw material chamber, a product chamber, a second raw material chamber and a cathode chamber. Under the driving of a direct-current electric field, Co < 2 + > and [Fe (CN) 6] < 4-> are directionally migrated to a product chamber for reaction, and a CoHCF material with smooth surface, uniform size and high crystallinity is generated. The method effectively inhibits side reactions, and improves the purity and structural controllability of the material. The separation coefficient of the prepared CoHCF on K < + > in a high-sodium solution with the ratio of K < + > to Na < + > being 1: 30 reaches up to 13.05, and the CoHCF is suitable for efficient selective extraction of potassium resources in seawater and brine.

The application belongs to the technical field of electrodialysis, and particularly relates to a tank-free continuous multistage countercurrent electrodialysis system and an electrodialysis method. The tank-free continuous multistage countercurrent electrodialysis system comprises two or more membrane stacks, each compartment of each membrane stack is not provided with a tank, and each compartment of each membrane stack is directly connected through a pipeline. The feed liquid in each compartment of each membrane stack in the electrodialysis system is organized in a countercurrent manner, and the feed liquid in each compartment realizes self-circulation in the stack through a circulating pump. The system is simple, convenient to connect, fast to start, and fast to respond. The inter-stage flow is stable, and the whole system is convenient to control.

The utility model discloses a membrane integration system for purifying glufosinate-ammonium, and belongs to the technical field of glufosinate-ammonium purification. Comprising an electrodialysis membrane stack, long screws are inserted in the periphery of the electrodialysis membrane stack, the long screws are sleeved with mounting screw sleeves through threaded structures, mounting rods are inserted in the periphery of the mounting screw sleeves, supporting plates are arranged at the ends of the mounting rods, and the long screws are sleeved with the supporting plates. According to the electrodialysis membrane stack fixing device, when the electrodialysis membrane stack is fixed by rotating the mounting screw sleeve, the mounting screw sleeve can extrude the supporting plate and the connecting plate through the supporting spring, so that the connecting plate is attached to the side wall of the electrodialysis membrane stack, the mounting screw sleeve drives the supporting plate to rotate and extrudes the supporting spring at the same time, and the electrodialysis membrane stack is fixed. Furthermore, the supporting springs can be used for buffering, so that the condition that the electrodialysis membrane stack is damaged due to too large extrusion force or is loosened due to too small extrusion force is avoided, and the electrodialysis membrane stack is relatively convenient to mount.

The utility model relates to the technical field of electrodialysis, and discloses a flow collection control system and an electrodialysis membrane separation device, the flow collection control system is applied to a membrane separation device comprising a plurality of flow channels, the flow collection control system comprises a plurality of flow regulation modules and a controller, the flow sensor is used for acquiring flow data entering the flow channel and adjusting the flow of the corresponding flow channel; the controller is connected with the flow adjusting module and used for obtaining the flow data of the multiple flow channels and controlling the flow of the flow channels according to the flow data of the flow channels so that the flow difference value of the flow channels can be within the preset difference value range. According to the utility model, the flow regulating modules are arranged on the flow channels, and the controller is used for acquiring and controlling the flow data of the flow channels, so that the flow of the flow channels is balanced, the problems of congestion or bias current, incapability of reaching the optimal value of the electric power of the membrane stack for a long time, large resistance and the like are solved, and the conductive effect and the mass transfer effect of liquid ions are improved; and the requirement of industrial automatic control is met.