CN212127639U - Electrodialysis experimental facilities with regulation and control function - Google Patents
Electrodialysis experimental facilities with regulation and control function Download PDFInfo
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- CN212127639U CN212127639U CN201922483655.XU CN201922483655U CN212127639U CN 212127639 U CN212127639 U CN 212127639U CN 201922483655 U CN201922483655 U CN 201922483655U CN 212127639 U CN212127639 U CN 212127639U
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- water
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- electrodialysis
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- 238000000909 electrodialysis Methods 0.000 title claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 262
- 239000012528 membrane Substances 0.000 claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 239000013505 freshwater Substances 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003014 ion exchange membrane Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model discloses an electrodialysis experimental facilities with regulation and control function. The equipment comprises a traditional electrodialysis device, a temperature control device, an electrode water pH control device and a material control device. The utility model discloses an electrodialysis equipment can make dense water and utmost point water carry out controllable heat exchange with the cooling water through dense water heat exchanger and utmost point water heat exchanger, and then realizes the regulation of electrodialysis membrane heap inflow temperature. In addition, the device can utilize an extreme water dosing tank and an extreme water dosing pump to control the pH of the extreme water. The utility model discloses an electrodialysis equipment can be according to the detected data of various sensors at the in-process of operation, comes the corresponding control parameter of real-time adjustment electrodialysis experimental facilities, and then realizes accurate control, has not only made things convenient for experimenter's operation, has prolonged life, assurance system's steady operation when protecting experimental facilities.
Description
Technical Field
The utility model belongs to the technical field of membrane technology water treatment facilities and specifically relates to an electrodialysis experimental facilities with regulation and control function.
Background
The electrodialysis technology utilizes the selective permeability of an ion exchange membrane to anions and cations, and the anions and cations are directionally migrated under the action of a direct current electric field, so that the purpose of separating, purifying and concentrating the electrolyte solution is achieved.
With the continuous innovation of ion exchange technology, electrodialysis equipment is also advancing, and generally comprises a water tank, a water pump, a membrane stack, a direct current power supply and corresponding pipelines, wherein the water pump is used for conveying feed liquid in the water tank into the membrane stack in a pressurization mode, the membrane stack is attached with a positive electrode and a negative electrode, and direct current is added through the power supply, so that positive ions and negative ions in the feed liquid are separated through an anion exchange membrane and a cation exchange membrane respectively.
With respect to the conventional electrodialysis apparatus, for example, chinese patent application CN201620605507.4 provides an integrated homogeneous membrane electrodialysis apparatus, which is characterized in that the integrated homogeneous membrane electrodialysis apparatus includes an electric control cabinet, a homogeneous membrane stack, a fresh water tank, a concentrate chamber water tank, an electrode chamber water tank, a fresh water pump, a concentrate chamber water pump, and an electrode chamber water pump. The electrodialysis device has the advantages that the electrodialysis device occupies small space and is more compact to install, but the traditional electrodialysis experimental device has lower automation degree, and the service life of the electrode is influenced by the change of the pH value of the polar water in the running process; the electrodialysis experiment temperature is optimally controlled to be between 25 ℃ and 35 ℃, and the service life and the experiment effect of the membrane are influenced by overhigh or overlow temperature; most of experimental equipment can only carry out batch experiments, and continuous discharge cannot achieve the effect of continuous experiments.
SUMMERY OF THE UTILITY MODEL
The utility model aims to improve traditional electrodialysis experimental facilities, provide a modified electrodialysis experimental facilities, this equipment possesses the automatic adjustment utmost point water pH, and multiple automation program such as automatic material temperature, automatic row material, greatly increased the practicality of equipment and the convenience of operation.
The utility model discloses the concrete technical scheme who adopts as follows:
an electrodialysis experimental facility with regulation and control functions comprises a fresh water tank, a concentrated water tank, an electrode water dosing tank, a fresh water pump, a concentrated water pump, an electrode water dosing pump, a concentrated water heat exchanger, an electrode water heat exchanger, a fresh water filter, a concentrated water filter and an electrodialysis membrane stack;
the water inlet of the extreme water tank is sequentially connected with an extreme water dosing pump and an extreme water dosing tank through pipelines;
the water outlet of the fresh water tank is connected with the fresh water tank and the fresh water filter in sequence through a fresh water chamber water inlet pipe and then is connected to a fresh water chamber water inlet of the electrodialysis membrane stack, the fresh water chamber water outlet of the electrodialysis membrane stack flows back into the fresh water tank through a fresh water chamber water outlet pipe, and a bypass is arranged on the fresh water chamber water outlet pipe;
the water outlet of the concentrated water tank is connected with a concentrated water pump, a concentrated water heat exchanger and a concentrated water filter in sequence through a concentrated chamber water inlet pipe and then is connected with the concentrated chamber water inlet of the electrodialysis membrane stack, the concentrated chamber water outlet of the electrodialysis membrane stack flows back into the concentrated water tank through a concentrated chamber water outlet pipe, and a bypass is arranged on the concentrated chamber water outlet pipe;
the water outlet of the polar water tank is connected with a polar water pump and a polar water heat exchanger in sequence through a polar chamber water inlet pipe and then is connected to a polar chamber water inlet of the electrodialysis membrane stack, and the polar chamber water outlet of the electrodialysis membrane stack flows back to the polar water tank through a polar chamber water outlet pipe;
cooling water pipelines are arranged on the concentrated water heat exchanger and the polar water heat exchanger, and a concentrated chamber water inlet pipe and a polar chamber water inlet pipe exchange heat with the cooling water pipelines;
the concentrated chamber water inlet pipe and the polar chamber water inlet pipe are respectively provided with a temperature sensor, the polar chamber water inlet pipe is also provided with a pH sensor, and the dilute chamber water outlet pipe and the concentrated chamber water outlet pipe are respectively provided with a conductivity sensor.
Preferably, the polar water dosing tank is stored with acid liquor and/or alkali liquor.
Preferably, pressure gauges are arranged at the inlet and outlet ends of the fresh water filter and the concentrated water filter.
Preferably, the water inlet pipelines and the water outlet pipelines of the fresh water tank, the concentrated water tank and the polar water tank are all provided with electromagnetic valves for controlling the pipelines to be opened and closed.
Preferably, liquid level sensors are arranged in the fresh water tank, the concentrated water tank and the extreme water tank.
Preferably, the electrodialysis membrane stack is connected with an electric control cabinet.
Preferably, the dilute chamber water inlet pipe and the concentrated chamber water inlet pipe are respectively provided with a sampling valve.
Preferably, the fresh chamber water inlet pipe, the concentrated chamber water inlet pipe and the polar chamber water inlet pipe are respectively provided with a diaphragm valve, a flowmeter and a pressure gauge.
Preferably, the concentration chamber water inlet pipe and the pole chamber water inlet pipe are in direct or indirect heat exchange contact with the cooling water pipeline.
Preferably, the electrodialysis experiment equipment is integrally installed on a frame.
The utility model discloses an electrodialysis equipment can make dense water and utmost point water carry out controllable heat exchange with the cooling water through dense water heat exchanger and utmost point water heat exchanger, and then realizes the regulation of electrodialysis membrane heap inflow temperature. In addition, the device can utilize an extreme water dosing tank and an extreme water dosing pump to control the pH of the extreme water. The utility model discloses an electrodialysis equipment can be according to the detected data of various sensors at the in-process of operation, comes the corresponding control parameter of real-time adjustment electrodialysis experimental facilities, and then realizes accurate control, has not only made things convenient for experimenter's operation, has prolonged life, assurance system's steady operation when protecting experimental facilities.
Drawings
Fig. 1 is a block diagram of an electrodialysis experimental apparatus with a regulation control function.
In the figure: the device comprises a fresh water tank 11, a concentrated water tank 12, an extreme water tank 13, an extreme water dosing tank 14, a fresh water pump 21, a concentrated water pump 22, an extreme water pump 23, an extreme water dosing pump 24, a concentrated water heat exchanger 31, an extreme water heat exchanger 32, a fresh water filter 41, a concentrated water filter 42, an electrodialysis membrane stack 5 and an electric control cabinet 6.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and embodiments.
As shown in fig. 1, the electrodialysis experimental apparatus with regulation and control functions provided in a preferred embodiment of the present invention includes a fresh water tank 11, a concentrated water tank 12, an extreme water tank 13, an extreme water dosing tank 14, a fresh water pump 21, a concentrated water pump 22, an extreme water pump 23, an extreme water dosing pump 24, a concentrated water heat exchanger 31, an extreme water heat exchanger 32, a fresh water filter 41, a concentrated water filter 42, an electrodialysis membrane stack 5, and an electric control cabinet 6.
The fresh water tank 11, the concentrated water tank 12 and the polar water tank 13 are respectively used for storing fresh water, concentrated water and polar water required in the electrodialysis membrane stack, and the specific categories of the fresh water, the concentrated water and the polar water can be determined according to the specific functions of electrodialysis. The fresh water tank 11, the concentrated water tank 12 and the pole water tank 13 are respectively provided with a water inlet and a water outlet, but the connection modes of the fresh water tank, the concentrated water tank and the pole water tank are different.
The water inlets of the fresh water tank 11 and the concentrated water tank 12 are respectively connected with an external water inlet pipeline, and the water inlet of the extreme water tank 13 is sequentially connected with an extreme water dosing pump 24 and an extreme water dosing tank 14 through pipelines. Acid liquor or alkali liquor can be stored in the extreme water dosing tank 14, or both the acid liquor and the alkali liquor can be stored in the extreme water dosing tank 14, and when the pH value of the extreme water needs to be adjusted, the acid liquor or the alkali liquor in the extreme water dosing tank 14 can be pumped into the extreme water tank 13 by starting the extreme water dosing pump 24.
The water outlet of the fresh water tank 11 is connected with a fresh water chamber inlet pipe, the fresh water tank 11 and the fresh water filter 41 are sequentially connected through the fresh water chamber inlet pipe and then connected to the fresh water chamber inlet of the electrodialysis membrane stack 5, and the fresh water chamber outlet of the electrodialysis membrane stack 5 flows back into the fresh water tank 11 through the fresh water chamber outlet pipe. And in order to discharge the fresh water out of the circulating pipeline when needed, a bypass can be arranged on the water outlet pipe of the fresh water chamber, and a bypass control valve is arranged on the bypass and used for controlling the on-off of the bypass. When the bypass control valve is opened, the fresh water in the outlet pipe of the fresh water chamber can be discharged through the bypass instead of entering the fresh water tank 11.
The water outlet of the concentrated water tank 12 is connected with a concentrated water inlet pipe, the concentrated water pump 22, the concentrated water heat exchanger 31 and the concentrated water filter 42 are sequentially connected through the concentrated water inlet pipe and then are connected with the concentrated water inlet of the electrodialysis membrane stack 5, and the concentrated water outlet of the electrodialysis membrane stack 5 flows back to the concentrated water tank 12 through the concentrated water outlet pipe. And in order to discharge the concentrated water out of the circulating pipeline when needed, a bypass can be arranged on the water outlet pipe of the concentrated chamber, and a bypass control valve is arranged on the bypass and used for controlling the on-off of the bypass. When the bypass control valve is opened, the concentrated water in the outlet pipe of the concentrated chamber can be discharged through a bypass instead of entering the concentrated water tank 12.
The water outlet of the polar water tank 13 is connected with a polar chamber water inlet pipe, the polar water pump 23 and the polar water heat exchanger 32 are sequentially connected through the polar chamber water inlet pipe and then connected to the polar chamber water inlet of the electrodialysis membrane stack 5, and the polar chamber water outlet of the electrodialysis membrane stack 5 flows back into the polar water tank 13 through the polar chamber water outlet pipe.
The two heat exchangers of the concentrated water heat exchanger 31 and the polar water heat exchanger 32 are used for adjusting the temperature of inlet water of the concentrated chamber and the temperature of inlet water of the polar chamber so as to ensure that the inside of the electrodialysis membrane stack 5 is at the optimal temperature. The concentrated water heat exchanger 31 and the polar water heat exchanger 32 are both provided with cooling water pipelines, and the concentrated chamber water inlet pipe and the polar chamber water inlet pipe respectively form heat exchange with the cooling water pipelines in the respective heat exchangers. The water inlet pipe of the dense chamber and the water inlet pipe of the polar chamber are in direct heat exchange contact with the cooling water pipeline, and the water inlet pipe of the dense chamber and the water inlet pipe of the polar chamber can also be in indirect heat exchange contact with the cooling water pipeline. And the cooling water pipelines of the two heat exchangers are respectively provided with a water pump and a valve so as to control the input of cooling water to the inside of the heat exchangers. The fresh water filter 41 and the concentrated water filter 42 function to remove impurities and precipitates in water.
In addition, in the invention, the automatic control of the water inlet and outlet parameters in the electrodialysis membrane stack 5 needs to be realized by arranging sensors, so that the temperature sensors are respectively arranged on the water inlet pipe of the concentration chamber and the water inlet pipe of the polar chamber, the pH sensor is also arranged on the water inlet pipe of the polar chamber, and the conductivity sensors are respectively arranged on the water outlet pipe of the dilute chamber and the water outlet pipe of the concentration chamber.
The electrodialysis membrane stack 5 is connected with an electric control cabinet 6, and the operation of the electrodialysis membrane stack can be controlled by the electric control cabinet 6. The electric control cabinet 6 is internally provided with a direct current power supply which can provide direct current for the electrodialysis membrane stack, and the automatic control of the equipment can be realized by the built-in PLC module.
In the running process of the electrodialysis equipment, the corresponding control parameters of the electrodialysis experimental equipment can be adjusted in real time according to the detection data of various sensors, so that accurate control is realized. In a preferred embodiment, the specific control process is as follows: when the temperature transmitter detects that the temperature of the material is increased to 35 ℃, a 4-20 mA current signal sent by a probe controls a cooling water bypass valve to be opened, so that the material is cooled through a heat exchanger, and the temperature is controlled to be between 25 ℃ and 35 ℃; when a pH sensor on the water inlet pipe of the polar chamber detects that the pH of the polar water is out of a reasonable range, the start and stop of a polar water dosing pump 24 are controlled by a 4-20 mA current signal sent by a PLC (programmable logic controller) to correct the pH of the polar water; when conductivity sensors on the water inlet pipe of the dense chamber and the water inlet pipe of the dilute chamber detect that the dense fresh water reaches the set target conductivity, a 4-20 mA current signal is sent to the PLC module to control the membrane stack to be powered off, and a discharge electromagnetic valve is controlled to be opened to discharge the materials; or the balance of the materials in and out can be controlled by the solenoid valve to meet the requirement of 24-hour continuous experiments.
Certainly, still further, corresponding devices such as sensors and valves can be added to the experimental device to realize other functions. In a preferred embodiment, pressure gauges are provided at the inlet and outlet ends of the fresh water filter 41 and the concentrated water filter 42; electromagnetic valves for controlling the opening and closing of the pipelines are arranged on the water inlet pipelines and the water outlet pipelines of the fresh water tank 11, the concentrated water tank 12 and the pole water tank 13; liquid level sensors are arranged in the fresh water tank 11, the concentrated water tank 12 and the polar water tank 13; the fresh chamber water inlet pipe and the concentrated chamber water inlet pipe are respectively provided with a sampling valve; diaphragm valves, flow meters and pressure gauges are arranged on the fresh water inlet pipe, the concentrated water inlet pipe and the polar chamber water inlet pipe. In addition, in order to meet the signal detection requirements of the PLC, a transmitter capable of automatically transmitting data may be used for each sensor.
In this experimental facilities, fresh water tank, dense water tank, utmost point water tank have all set up liquid level switch, when any one of them water tank reached low liquid level, can in time stop the pump power protection equipment. The polar water dosing pump can complete the automatic control of the pH value of the polar water through control, so that the pH value of the polar water is kept in a reasonable range, and the service life of the electrode is prolonged. Moreover, the temperature control device is formed by the temperature sensor and the two heat exchangers under the control of the PLC, the temperature of the material can be kept within a reasonable range through the switching of the control valve, the membrane is protected, the experimental efficiency is improved, the automatic material discharging and changing functions of the equipment can be realized, and the requirements of continuous experiments are met. The electrodialysis experimental equipment is integrally installed on the frame so as to be convenient for integral movement.
In one embodiment, the above-described electrodialysis apparatus was used to perform the test, and the electrodialysis apparatus was selected from a stack of ion exchange membranes from Hangzhou blue and Natural environmental technologies, Inc. At room temperature, 3.5% sodium chloride solution is added into a fresh water tank, pure water is added into a concentrated water tank, 2% sodium chloride solution is added into an extreme water tank, and the treatment is carried out for 30min under the condition that the voltage of an external direct-current power supply is constant at 120V, wherein the conductance of the concentrated water can reach more than 100mS/cm, and the conductance of the fresh water can reach less than 5 mS/cm.
The above-mentioned embodiments are only used for explaining the present invention, and are not intended to limit the present invention in any form, and any modifications, equivalent replacements, improvements, etc. made by the present invention are within the protection scope of the present invention without exceeding the technical solutions recorded in the claims.
Claims (10)
1. An electrodialysis experimental facility with a regulation and control function is characterized by comprising a fresh water tank (11), a concentrated water tank (12), an extreme water tank (13), an extreme water dosing tank (14), a fresh water pump (21), a concentrated water pump (22), an extreme water pump (23), an extreme water dosing pump (24), a concentrated water heat exchanger (31), an extreme water heat exchanger (32), a fresh water filter (41), a concentrated water filter (42) and an electrodialysis membrane stack (5);
wherein the water inlets of the fresh water tank (11) and the concentrated water tank (12) are respectively connected with a water inlet pipeline, and the water inlet of the extreme water tank (13) is sequentially connected with an extreme water dosing pump (24) and an extreme water dosing tank (14) through pipelines;
a water outlet of the fresh water tank (11) is connected with the fresh water tank (11) and the fresh water filter (41) in sequence through a fresh water chamber water inlet pipe and then is connected with a fresh water chamber water inlet of the electrodialysis membrane stack (5), a fresh water chamber water outlet of the electrodialysis membrane stack (5) flows back into the fresh water tank (11) through a fresh water chamber water outlet pipe, and a bypass is arranged on the fresh water chamber water outlet pipe;
a water outlet of the concentrated water tank (12) is connected with a concentrated water pump (22), a concentrated water heat exchanger (31) and a concentrated water filter (42) in sequence through a concentrated chamber water inlet pipe and then is connected with a concentrated chamber water inlet of the electrodialysis membrane stack (5), a concentrated chamber water outlet of the electrodialysis membrane stack (5) flows back into the concentrated water tank (12) through a concentrated chamber water outlet pipe, and a bypass is arranged on the concentrated chamber water outlet pipe;
a water outlet of the polar water tank (13) is sequentially connected with a polar water pump (23) and a polar water heat exchanger (32) through a polar chamber water inlet pipe and then is connected with a polar chamber water inlet of the electrodialysis membrane stack (5), and a polar chamber water outlet of the electrodialysis membrane stack (5) flows back into the polar water tank (13) through a polar chamber water outlet pipe;
cooling water pipelines are arranged on the concentrated water heat exchanger (31) and the polar water heat exchanger (32), and a concentrated chamber water inlet pipe and a polar chamber water inlet pipe exchange heat with the cooling water pipelines;
the concentrated chamber water inlet pipe and the polar chamber water inlet pipe are respectively provided with a temperature sensor, the polar chamber water inlet pipe is also provided with a pH sensor, and the dilute chamber water outlet pipe and the concentrated chamber water outlet pipe are respectively provided with a conductivity sensor.
2. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein said polar water dosing tank (14) stores acid solution and/or alkali solution.
3. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the inlet and outlet ends of said fresh water filter (41) and said concentrated water filter (42) are provided with pressure gauges.
4. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the inlet and outlet pipes of the fresh water tank (11), the concentrated water tank (12) and the polar water tank (13) are provided with electromagnetic valves for controlling the pipes to open and close.
5. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein liquid level sensors are disposed in the fresh water tank (11), the concentrated water tank (12) and the polar water tank (13).
6. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the electrodialysis membrane stack (5) is connected with an electric control cabinet (6).
7. An electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the dilute chamber inlet pipe and the concentrated chamber inlet pipe are respectively provided with a sampling valve.
8. An electrodialysis experimental facility with regulation and control functions as claimed in claim 1, wherein the inlet pipe of the dilute chamber, the inlet pipe of the concentrated chamber and the inlet pipe of the polar chamber are respectively provided with a diaphragm valve, a flowmeter and a pressure gauge.
9. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the inlet pipe of the concentration chamber and the inlet pipe of the polar chamber are in direct or indirect heat exchange contact with the cooling water pipeline.
10. Electrodialysis experimental facility with regulation and control function as claimed in claim 1, wherein the electrodialysis experimental facility is integrally mounted on a frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922483655.XU CN212127639U (en) | 2019-12-30 | 2019-12-30 | Electrodialysis experimental facilities with regulation and control function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922483655.XU CN212127639U (en) | 2019-12-30 | 2019-12-30 | Electrodialysis experimental facilities with regulation and control function |
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| CN212127639U true CN212127639U (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504551A (en) * | 2022-01-27 | 2022-12-23 | 江苏日泰环保工程有限公司 | Electrodialysis system that material is stable |
-
2019
- 2019-12-30 CN CN201922483655.XU patent/CN212127639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504551A (en) * | 2022-01-27 | 2022-12-23 | 江苏日泰环保工程有限公司 | Electrodialysis system that material is stable |
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Address after: 310012 Building 5, Hang Seng Science Park, 1218 Wenyi West Road, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou lanran Technology Co.,Ltd. Address before: 310012 Building 5, Hang Seng Science Park, 1218 Wenyi West Road, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU LANRAN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
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