84 results about "Electrodeionization" patented technology

The utility model discloses an anion and cation double-membrane type electrodeionization device. The device internally comprises a cathode chamber, a resin chamber and an anode chamber; the cathode chamber and the resin chamber are isolated by a cation exchange membrane, the anode chamber and the resin chamber are isolated by an anion exchange membrane, and the distance between the two membranes is 10-100cm. According to the utility model, the electric regeneration efficiency of the invalid resin and the quality of subsequent produced water can be obviously improved, electrolyte solution is not consumed, the environmental protection problem is avoided, an electrode water circulating pump can be omitted, and the system and operation management are simplified.

The invention relates to a portable hydrogen conductivity measuring device based on electrodeionization. The portable hydrogen conductivity measuring device comprises a sampling detection subsystem, an electrodeionization subsystem, a measuring subsystem and a processor, the sampling detection subsystem is communicated with the electrodeionization subsystem and the measurement subsystem and is used for controlling the temperature, the pressure and the flow of sample water flowing into the electrodeionization system; the electrodeionization subsystem is communicated with the measurement subsystem and is used for removing cations in the sample water; the measurement subsystem is communicated with the electrodeionization system and is used for accurately measuring the conductivity, namely the hydrogen conductivity, of the sample water subjected to EDI treatment in real time; and the processor is used for providing a stable excitation signal for the conductivity electrode, acquiring an original resistance or conductivity signal and a temperature signal of the electrode, executing a temperature compensation algorithm to obtain a hydrogen conductivity value at 25 DEG C, outputting a final result to the display screen, and transmitting the final result to an external system. The invention also discloses a corresponding measurement method, electronic equipment and a computer readable storage medium.

The invention discloses an electrodeionization device for preparing ultrapure water, and relates to the technical field of water treatment.The electrodeionization device comprises a shell, an electrodeionization cavity, a cathode chamber, an anode chamber and a cation replacement module, a deionization module is arranged between the cation replacement module and the cathode chamber, and a concentrated water chamber is arranged between the deionization module and the cation replacement module; the deionization module comprises a first cation exchange membrane, a decation fresh water chamber, a first bipolar membrane, a deanion fresh water chamber and a first anion exchange membrane which are arranged in sequence, and the cation replacement module comprises a second cation exchange membrane, a cation replacement chamber, a third cation exchange membrane, an ion supply chamber and a second anion exchange membrane which are arranged in sequence; to-be-treated water sequentially flows through the cation replacement chamber, the deanion fresh water chamber and the decation fresh water chamber, and a strong acid and strong alkali salt solution is contained in the ion supply chamber. The device has the advantages of efficiently removing soluble acid gas, reducing the scaling risk of the concentrated water chamber and improving the resistivity of produced water.

A method for the purification of a reaction crude can include employing one or more electrodeionization modules each including a cathode, an anode, and at least one ion-depletion compartment interposed between pairs of ion-concentration compartments. Each ion-concentration compartment can contain an ion-exchange medium. The method can include passing a reaction crude through each ion depletion compartment. The reaction crude can be produced from a process including at least one ionic species. The method can include supplying current between the anode and the cathode. The method can include recovering an ion-depleted stream from each ion-depletion compartment. The method can include recovering the ionic or ionizable species from each ion-concentration compartment.

This pure water production apparatus comprises a reverse osmosis membrane and an electrodeionization device 2. In the electrodeionization device 2, anion exchange membranes 11 and cation exchange membranes 12 are alternately arranged between an anode plate 15 and a cathode plate 16, and by constituting compartments with the anion exchange membranes 11 and the cation exchange membranes 12, a desalting chamber 13 and a concentration chamber 14 are formed, and an anode chamber and a cathode chamber are formed at respective ends. As feed water to the desalting chamber 13, permeated water W1 from a reverse osmosis membrane device 1 is supplied to the desalting chamber 13 to obtain treated water W2. Further, as feed water W3 to the concentration chamber 14, permeate from the reverse osmosis membrane device 1 is supplied, and concentrated water W4 is discharged. In the electrodeionization device 2, the desalting chamber 13 is filled with substantially 100% by weight of an anion exchange resin. According to this pure water production apparatus, the removal efficiency of weak acid ions such as boron and silica can be improved without using chemicals.

In an electrodeionization device, a concentration compartment and a desalting compartment are defined by ion exchange membranes between a positive electrode and a negative electrode; concentrated water is caused to flow into the concentration compartment; water to be treated is caused to flow into the desalting compartment and is extracted as deionized water; and part of the deionized water is caused to flow as concentrated water into the concentration compartment in a direction opposite the flow direction of the desalting compartment. Water supplied to the electrodeionization device is treated using a water softener, an RO device, and a membrane degassing device, and the total concentration of Ca ions and Mg ions is 50 μg / L or lower.

The electro-deionized water production system (EDI system) can be assembled quickly without requiring skilled labor. [Solution] The assembly equipment for assembling an EDI device in which both the desalination chamber and the concentration chamber are composed of a frame having openings and ion exchange resin is filled in the openings includes a membrane extraction robot 60 that has the function of extracting the ion exchange membrane 30 stored in water, a handling robot 50 that has the function of transporting the frame 40 and placing it on the work area, receiving the ion exchange membrane 30 extracted by the membrane extraction robot 60 and transporting it to the work area, and a resin supply robot 70 that has the function of filling the openings of the frame 40 placed on the work area with ion exchange resin. After the handling robot 50 has finished filling the openings of the frame 40 with ion exchange resin, it positions the ion exchange membrane 30 so as to cover the filled ion exchange resin.

A water preparation apparatus for determining an amount of total chlorine in purified water is disclosed. The water preparation apparatus includes a chlorine sensing system, a water pretreatment filter, a reverse osmosis filter, and an electrodeionization (“EDI”) module. The chlorine sensing system is configured to determine an amount of total chlorine in the purified water by applying, at a first time, a source voltage to the purified water and removing, at a second time, the source voltage. The chlorine sensing system then measures, after the second time, an electrical parameter of the purified water. The chlorine sensing system determines the amount of total chlorine in the purified water based on the measured electrical parameter.

This electric deionization apparatus 1 is formed by arranging sub-blocks 3A-3F side by side. Water supply ports 4A, 4B for arranging a water supply line 4 are formed at both upper ends of the cells of the sub-blocks 3A-3F. Concentrated water supply ports 6A, 6B for arranging a concentrated water supply line 6 are formed at both lower ends of the cells. Constant flow valves 11A, 11B are respectively provided on right and left sides of the concentrated water supply line 6, and manual valves 12A, 12B are respectively provided on right and left sides of a concentrated waste water outflow line 7. This electric deionization apparatus can efficiently produce high quality treated water.

This water treatment system provided with an EDI device comprises: a circulation pipe 36 that circulates treated water (deionized water) from an EDI device 10 to a preceding stage of the EDI device 10; a water supply pipe 35 that supplies the treated water toward a use point; a flow rate adjustment unit 34 that distributes the treated water to the circulation pipe 36 and the water supply pipe 35; a circulation pipe 44 that circulates concentrated water from the EDI device 10 to the preceding stage of the EDI device 10; a discharge pipe 43 that discharges the concentrated water to the outside of the system; a flow rate adjustment unit 42 that distributes the concentrated water to the circulation pipe 44 and the discharge pipe 43; and water quality monitoring devices 51 to 54 that monitor the water quality within the water treatment system from the EDI device 10. At least one of the flow rate adjustment units 34, 42 is controlled on the basis of a monitoring result from at least one of the water quality monitoring devices 51 to 54.

This method for controlling an electrodeionization device is for an operation for changing the amount of water supplied to an electrodeionization device 1. The passing water flow rate is changed such that a flow rate of water supply W0 to a desalting chamber 36 of the electrodeionization device 1 is 50％ or less per minute with respect to a maximum water supply flow rate in the desalting chamber 36 of the electrodeionization device 1 while a flow rate of concentrated water W5 discharged from the electrodeionization device 1 is kept constant. According to such an electrodeionization device operation method, it is possible to prevent a reduction in quality of treated water when an operation in which the passing water flow rate is changed is performed.

The utility model discloses an intelligent self-adaptive electrodeionization system for a hydrogen conductivity meter. The intelligent self-adaptive electrodeionization system comprises an electrodeionization system main body and a structure sensor group, a quantification unit and a real-time regulation and control unit; the structural sensor group is arranged on the electrodeionization system main body and is used for acquiring structural dynamic response; the quantifying unit comprises a volume measuring element, a sectional area measuring element and a height measuring element; the volume measuring element is used for determining resin capacities of the concentrated water chamber and the fresh water chamber; the sectional area measuring element is used for determining sectional areas of the concentrated water chamber and the fresh water chamber; the height measuring element is used for determining the height ratio of the concentrated water chamber to the fresh water chamber; the real-time regulation and control unit comprises a constant-voltage unit, a variable-voltage unit, a constant-current unit, a variable-current unit, a constant-flow unit and a variable-flow unit which are respectively used for stabilizing and / or changing the membrane stack voltage, the membrane stack current and the water inlet flow of a module inlet. The utility model further discloses a hydrogen conductivity meter which comprises the intelligent self-adaptive electrodeionization system and a conductivity complete machine, and the conductivity complete machine comprises a conductivity electrode and a transmitter.

This invention discloses an electro-deionization water treatment device and a treatment method for chemical water purification, relating to the field of water treatment equipment. A constant flow inlet assembly is installed at the inlet ends of both the concentrate chamber and the pure water chamber. When water enters the concentrate and pure water chambers, the hydraulic balancing unit within the constant flow inlet assembly moves upward and contracts under the pressure of the incoming water. During this contraction, the internal pressure gradually increases until the pressure within the hydraulic balancing unit balances the incoming water pressure. Simultaneously, the hydraulic balancing unit adjusts the valve opening size of the constant flow valve assembly during the pressure balancing process. This ensures that the valve opening is smaller when the water pressure is higher and larger when the water pressure is lower. By automatically adjusting the valve opening size according to the water pressure, the inlet flow rate is not affected by the water pressure, thus maintaining a suitable flow ratio between the concentrate and pure water chambers to improve the water treatment effect of the equipment.

The invention relates to the technical field of electrodeionization reactors, in particular to a spiral runner type anti-silicon scale membrane-free electrodeionization reactor. Comprising a shell, an anode assembly and a cathode assembly which are coaxially arranged, and a resin cavity filled with an ion exchange resin layer is formed between the anode assembly and the cathode assembly; a spiral flow guide piece is arranged in the resin cavity to form a spiral flow channel, the flow guide piece is formed by axially arranging a plurality of spiral flow guide plates at intervals, the flow guide plates are provided with through grooves, the included angle between every two adjacent through grooves is equal to 1, and spiral grooves can be formed in the plate faces at gradually-changing intervals. The structure forces water flow to rotate and propel, enhances radial mixing, quickly disperses OH <-> local enrichment near the cathode, inhibits silicic acid polymerization and composite silicate deposition, reduces pressure drop increase, stabilizes effluent quality, and improves long-term operation reliability of membrane-free EDI under high-silicon water quality.

An electrodeionization device includes a spacer comprising a first inlet port, a first outlet port, a first plurality of first flow channels configured to direct fluid in a first direction from the first inlet port to the first outlet port, and a second flow channel in series fluid communication with the first plurality of first flow channels between the first inlet port and first outlet port and configured to direct fluid in a second direction different from the first direction from the first inlet port to the first outlet port.

The application relates to the technical field of water treatment, and discloses a system for deep treatment and reuse of iron ore sand industrial water in an island, which comprises, in sequence, a water inlet pretreatment unit, a biochemical denitrification and phosphorus removal unit, a sedimentation and separation unit, a membrane physical interception unit and an electrodeionization unit. The biochemical denitrification and phosphorus removal unit is an AAO-AO reaction tank, which is internally divided into five biochemical reaction zones in sequence and is provided with a nitrification liquid internal reflux pipeline; the membrane physical interception unit comprises a rotary drum filter tank, an ultrafiltration unit and a nanofiltration unit; the main body of the electrodeionization unit is internally configured with a reticular platinum-plated titanium electrode and a stainless steel compression spring for providing downward mechanical pressure, and is internally filled with a resin layer formed by uniformly and integrally filling and mixing strong acid cation resin, weak acid cation resin, strong base anion resin and weak base anion resin. The system is processed by biochemical reaction, membrane and electrodeionization in cooperation, high salt hardness of raw water is removed, produced water reaches the standard of iron ore sand water, no chemical agent is needed for regeneration, and the water recovery rate is improved.

The utility model discloses a positive and negative double-membrane electrodeionization device with an integrated frame body structure, which comprises a reaction chamber enclosed by a frame body, an anode chamber cover plate and a cathode chamber cover plate, and the reaction chamber internally comprises an anode chamber, a resin chamber and a cathode chamber which are formed by an anion exchange membrane and a cation exchange membrane at intervals and are arranged in sequence, the resin chamber is respectively communicated with a water inlet / regeneration water outlet connector and a water production / regeneration water inlet connector; the device further comprises a plurality of rigid supporting pieces, each rigid supporting piece is provided with a binding face capable of being tightly attached to the outer wall face of the frame body, the frame body is clamped between the anode chamber cover plate and the cathode chamber cover plate and connected in a sealed mode, and the rigid supporting pieces are distributed at intervals in the mode that the binding faces of the rigid supporting pieces are tightly attached to the outer wall face of the frame body. And the two ends of each rigid supporting piece are fixedly connected with the anode chamber cover plate and the cathode chamber cover plate respectively. The tight hooping effect of the rigid supporting piece can greatly improve the bearing strength of the whole device, so that the device is not prone to deformation and fracture when bearing large internal pressure, and the service life of the device is greatly prolonged.

The utility model discloses an EDI (Electrodeionization) device, which belongs to the field of EDI and comprises an anode plate, a first partition plate, an anode film, a second partition plate, at least one group of treatment units, a first cation film, a third partition plate, a cathode film, a fourth partition plate and a cathode plate which are sequentially arranged from left to right, the treatment unit comprises a second cation membrane, a fifth partition plate, a first anion membrane, a sixth partition plate, a bipolar membrane, a seventh partition plate, a third cation membrane, an eighth partition plate, a second anion membrane and a ninth partition plate which are sequentially arranged from left to right, anion exchange resin is arranged in the sixth partition plate, cation exchange resin is arranged in the seventh partition plate, and the cation exchange resin is arranged in the ninth partition plate. The water outlet of the sixth partition plate is communicated with the water inlet of the seventh partition plate. According to the utility model, continuous online cleaning can be realized, and high-concentration saline water can be treated.

A system and method for increasing total dissolved solids (TDS) concentration and pH of water is provided herein. The water is processed using a variety of filtration and purification methods, including carbon filtration, water softening, reverse osmosis, and electrodeionization. After filtration and purification, the water is pumped into a mineral infusion chamber, including a plurality of bioceramic components. At least one TDS sensor monitors the TDS concentration of the water stream, and a flow rate out of the mineral infusion chamber is controlled by a flow control valve based on sensor data produced by the at least one TDS sensor.

The invention discloses a high-utilization-rate water treatment device and method, and relates to the technical field of water treatment, and the high-utilization-rate water treatment device comprises a raw water pretreatment unit, a first-stage filtering unit, a second-stage filtering unit and a continuous electrodeionization unit which are connected in sequence; the primary filtering unit is connected with a pure water outlet module, the secondary filtering unit is connected with a pure water outlet module, the continuous electrodeionization unit is connected with an ultrapure water outlet module, wastewater outlets of the primary filtering unit and the secondary filtering unit are connected with a recycled wastewater pretreatment unit in parallel, and a pure water outlet of the recycled wastewater pretreatment unit is connected with an inlet of the primary filtering unit. The problems that a water treatment system in the traditional technology cannot meet the core requirements of low ions, low TOC and low particulate matter in the electroplating industry, the produced water quality fluctuation is large, a plating solution fails easily, and the defect rate of a plating layer is increased are solved; water resources are wasted, and the environmental protection pressure of high-salinity wastewater treatment is increased; and the problems that the dispersion capacity of a plating solution is reduced and a plating layer is not uniform due to impurity accumulation are solved.

To provide a method for operating a two-stage electrodeionization system that reduces power consumption and stabilizes a quality of treated water.SOLUTION: After raw water W is treated in a reverse osmosis membrane device 3, permeate water W1 from the reverse osmosis membrane device 3 is treated in a first electrodeionization device 4 and a second electrodeionization device 5 in this order to obtain second deionized water W3. Conductivity of the water to be treated W1 is measured by a conductivity meter 6, and when the conductivity of the water to be treated W1 increases above a predetermined value, an operating current of the first electrodeionization device 4 is increased. On the other hand, when the conductivity of the water to be treated W1 falls below the predetermined value, the operating current (current density) of the first electrodeionization device 4 is reduced. This allows the amount of power consumption to be reduced while keeping a water quality (e.g., conductivity) of first deionized water W2 within a target range.SELECTED DRAWING: Figure 1

In a primary pure water device, an electric deionization device communicated with a water supply pump is provided with a DC power supply, and desalted water from the electric deionization device can be supplied to a sub-tank. The sub-tank is provided with a level switch. In addition, while a control valve and a flow meter are provided in a flow path for the desalted water from the electric deionization device, a control valve and a flow meter are also provided in a flow path for concentrated water from the electric deionization device. The measurement data of the level switch and the flow meters can be transmitted to a control device, which can control the water supply pump and the control valves.

This water treatment apparatus comprises: a first electrodeionization device which removes a first ionic material from raw water; a second electrodeionization device which removes a second ionic material having a different charge amount from the first ionic material from the raw water; a first storage chamber; a second storage chamber; a purified water flow path along which flows purified water obtained by removing at least one of the first ionic material or the second ionic material; a first ion flow path which guides first stored water stored in the first storage chamber to the purified water flow path; a second ion flow path which guides second stored water stored in the second storage chamber to the purified water flow path; at least one ion valve which opens and closes the first ion flow path and the second ion flow path; and a controller which controls the first electrodeionization device, the second electrodeionization device, and the at least one ion valve.

This utility model relates to the field of electro-deionization water purification technology and discloses an electro-deionization water purification device, including a shell assembly. A rubber diaphragm is fixedly installed on the upper inner wall of the shell assembly, an electrode assembly is installed on the outer wall of the shell assembly, a ring-shaped sterilization assembly is installed on the lower inner wall of the shell assembly, and an auxiliary assembly is installed at the bottom of the shell assembly. The electrode assembly facilitates the directional migration of ions in the water under the action of an electric field, with cations moving towards the cathode and anions moving towards the anode. This ion migration allows for the effective removal of ions from the water, thereby achieving deep water purification. Furthermore, the rubber diaphragm allows it to regain its adsorption capacity, ensuring stable operation of the device over a long period and reducing the frequency and cost of chemical regeneration.

The utility model belongs to the technical field of water treatment, and particularly relates to an ultrapure water production system which comprises a raw water tank, an ultrafiltration device, a primary reverse osmosis device, a secondary reverse osmosis device, an electric deionized water device and an ultrapure water tank which are connected in sequence, ultrapure water production system further comprising an ultrafiltration water tank located on a pipeline between an ultrafiltration device and a primary reverse osmosis device and / or a primary reverse osmosis water tank located on a pipeline between a primary reverse osmosis device and a secondary reverse osmosis device and / or a secondary reverse osmosis water tank located on a pipeline between a secondary reverse osmosis device and an electric deionized water device and a box. By additionally arranging the ultrafiltration water tank and / or the first-stage reverse osmosis water tank and / or the second-stage reverse osmosis water tank, water can be stored, adjusted and distributed through the ultrafiltration water tank and / or the first-stage reverse osmosis water tank and / or the second-stage reverse osmosis water tank, so that buffering is provided when the water consumption fluctuates, and the technical problems of large water quality fluctuation, unstable water quality and the like are solved.

The application relates to a high-nitrogen garbage leachate degradation device, which comprises two connected sequencing batch anaerobic reactors, and reactor water inlet pipes and reactor sludge inlet pipes are respectively connected to the lower parts of the anaerobic reactors, and belongs to the technical field of water treatment equipment. The device is characterized in that the upper end of the anaerobic sequencing batch reactor is provided with an electrodeionization device which is composed of five compartments, i.e. an anode chamber, a first concentrated water chamber, a fresh water chamber, a second concentrated water chamber and a cathode chamber. The fresh water chamber is communicated with the reactor and is filled with mixed cation and anion exchange resins in a ratio of 1:1. The garbage leachate enters the fresh water chamber from the lower end of the reactor. The device fully utilizes the anaerobic biological treatment method and the electrodeionization technology, is energy-saving and environment-friendly, can effectively remove ammonia nitrogen and COD in the high-nitrogen garbage leachate, does not need frequent shutdown and cleaning, can be operated for a long time, and meets the environmental protection requirements.

A water-softening system includes a filter device including filter units that are provided in at least some of a plurality of supply channels arranged in parallel to supply raw water to a consumption site and that remove at least part of ionic matter contained in supplied raw water by electro-deionization and discharge soft water containing less ionic matter than the raw water, a plurality of supply valves provided in the plurality of supply channels to open or close the supply channels, and a processor connected to the filter device and the plurality of supply valves. The processor determines whether water is supplied to the consumption site and controls at least one of the plurality of supply valves to remain open to maintain a state in which water is allowed to be supplied to the consumption site, when it is determined that no water is supplied to the consumption site.

The invention discloses a purification method in dual water preparation, which comprises the following steps: S1, sequentially carrying out sand filtration, activated carbon adsorption, security filtration and reverse osmosis treatment on raw water to obtain primary pure water; s2, injecting a sodium sulfite solution into the primary pure water, and carrying out turbulent flow reaction to obtain reduced pure water; s3, the reduced pure water is subjected to mixed bed treatment, and mixed bed pure water is obtained; s4, introducing the mixed bed pure water into an EDI module, and carrying out continuous electrodeionization treatment to obtain desalted pure water; s5, the desalted pure water is sequentially subjected to ultraviolet sterilization, ultrafiltration sterilization and membrane degassing, and dual water is obtained. A sodium sulfite reduction step is introduced in a reverse osmosis water production stage, so that high-valence metal ions are subjected to directional valence conversion, the pollution hidden danger of the high-valence metal ions is eliminated, the adsorption path of the metal ions to the surface of a silicon wafer is blocked, the gate oxide yield of chip manufacturing is further improved, and meanwhile, the risk of electrical property degradation such as electric leakage of a device is reduced.

A method for purifying hydrogen peroxide capable of producing highly pure hydrogen peroxide is provided. The method for purifying hydrogen peroxide of the present invention includes the steps of regenerating an adsorption resin in a primary purification system using an acidic solution, a basic solution, or a combination thereof, purifying a crude hydrogen peroxide product using the adsorption resin in the primary purification system, and purifying the primary purified hydrogen peroxide solution using a secondary purification system, which includes an electrodeionization system, and the adsorption resin removes organic carbon and cations from the crude hydrogen peroxide product.

The invention discloses a circulating cleaning device for a pipeline of a liquid cooling unit of an air conditioner. The circulating cleaning device comprises a deionization part, a deionized water storage tank, a reclaimed water storage tank and a controller, the deionization part is provided with a filtering tank, a softening tank, a primary reverse osmosis device, a secondary reverse osmosis device and an electric deionization device; the filtering tank is provided with a water receiving pipe with a make-up pump; the deionized water storage tank is communicated with the electric deionization device and the reclaimed water storage tank and is provided with a first electric valve; the deionized water storage tank is provided with a first liquid level switch; the reclaimed water storage tank is provided with a water outlet pipe and a water return pipe; the water outlet pipe is provided with a target flow switch, a pump set and a water outlet side detector; the water return pipe is provided with a Y-shaped filter and a water return side detector; valves are arranged on the water outlet pipe and the water return pipe; the reclaimed water storage tank is provided with a second electric valve and a second liquid level switch; the controller is connected with the make-up pump, the first liquid level switch, the first electric valve, the second liquid level switch, the second electric valve, the target flow switch, the pump set, the water outlet side detector and the water return side detector. The water quality requirement of the liquid cooling air conditioning unit can be met.