Electrodialysis testing device

Abstract

The utility model relates to an electrodialysis testing device which comprises a support and an electric control cabinet fixedly connected to the top of the support, a controller is arranged in the electric control cabinet, five centrifugal pumps are fixedly connected to the top of the support, the input ends of the centrifugal pumps are communicated with inlet pipelines, and stock solution is pumped into the corresponding centrifugal pumps through the corresponding inlet pipelines. The top of the support is fixedly connected with five core filters, the output ends of the centrifugal pumps are communicated with the corresponding core filters, the top of the support is fixedly connected with five electrodialysis units, and the output ends of the core filters are communicated with the corresponding electrodialysis units through a control part. The utility model relates to the technical field of electrodialysis tests. According to the utility model, the stock solution can be pumped into the corresponding dialysis tanks by using different centrifugal pumps according to different salt contents of the stock solution, and the output liquid after dialysis is pumped into another dialysis tank through another centrifugal pump until qualified filtrate is finally produced, so that the stock solution is filtered in a grading manner, and the salt removal rate of the stock solution is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrodialysis testing, in particular to an electrodialysis testing device. Background Art

[0002] The electrodialysis process is a combination of the electrochemical process and the dialysis diffusion process. Under the drive of an external DC electric field, the anions and cations move to the anode and cathode respectively by utilizing the selective permeability of the ion exchange membrane. During the ion migration process, if the fixed charge of the membrane is opposite to the charge of the ions, the ions can pass through; if their charges are the same, the ions are repelled, thereby achieving the purpose of desalination, concentration, refinement or purification of the solution.

[0003] Electrodialysis technology has been widely used in the field of water treatment. At present, electrodialysis equipment generally divides water into multiple branches through the main water inlet pipeline to enter the internal chamber of the electrodialysis equipment, and then flows out in different branches after filtration. However, this method does not grade and filter the raw liquid, resulting in a low desalination rate of the raw liquid and serious concentration polarization, which reduces the dialysis efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an electrodialysis testing device so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] The electrodialysis testing device comprises a bracket and an electric control cabinet fixedly connected to the top of the bracket, the electric control cabinet having a built-in controller, five centrifugal pumps fixedly connected to the top of the bracket, the input end of the centrifugal pump is connected to an inlet pipeline, and the raw liquid is pumped into the corresponding centrifugal pump through the corresponding inlet pipeline, five core filters fixedly connected to the top of the bracket, the output end of the centrifugal pump is connected to the corresponding core filter, and five electrodialysis units are fixedly connected to the top of the bracket, and the output end of the core filter is connected to the input end of the corresponding electrodialysis unit through a control unit.

[0007] Furthermore, the electrodialysis unit includes a dialysis cell and an electric field generator and an ion exchange membrane arranged in the dialysis cell, the output end of the core filter is connected to the dialysis cell, the electric field generator applies an electric field to the dialysis cell, the ion exchange membrane divides the interior of the dialysis cell into two areas, and the outer wall of the dialysis cell is located on opposite sides of the ion exchange membrane and is fixedly provided with an output liquid drainage pipe and a concentrate drainage pipe.

[0008] Furthermore, the control unit includes a pump outlet pressure gauge, a diaphragm valve and an electrodialysis inlet pressure gauge which are sequentially arranged on the pipeline between the core filter and the electrodialysis unit, the pump outlet pressure gauge and the electrodialysis inlet pressure gauge display the raw liquid pressure, and the diaphragm valve adjusts the pressure and flow of the raw liquid.

[0009] Furthermore, a check valve is fixedly connected to the outer peripheral side of the pipeline between the output end of the centrifugal pump and the input end of the core filter.

[0010] Furthermore, a flow sensor is fixedly connected to the outer peripheral side of the pipeline between the diaphragm valve and the electrodialysis inlet pressure gauge, and the flow sensor and the centrifugal pump are both electrically connected to the controller.

[0011] In summary, the present invention includes at least one of the following beneficial technical effects:

[0012] 1. The electrodialysis test device can use different centrifugal pumps to pump the stock solution into the corresponding dialysis tank according to the different salt content of the stock solution. The output liquid after the dialysis is completed is pumped into another dialysis tank through other centrifugal pumps until the qualified filtrate is finally produced, thereby realizing graded filtration of the stock solution and improving the desalination rate of the stock solution. In addition, the stock solution can be pumped into a suitable dialysis tank to match a suitable ion exchange membrane according to the different water quality of the stock solution, thereby reducing the concentration polarization phenomenon;

[0013] 2. In this electrodialysis test device, each electrodialysis flow channel can independently control the pressure and flow rate through the corresponding diaphragm valve to adapt to the processing requirements of different stages, thereby optimizing the entire electrodialysis process;

[0014] 3. The electrodialysis test device monitors the flow state through a flow sensor. When the flow is lower or higher than the specified value, the centrifugal pump stops working to avoid equipment damage caused by the flow not meeting the requirements;

[0015] 4. In the electrodialysis test device, the stock solution is sequentially passed through various dialysis cells for multi-stage separation, thereby improving the separation efficiency of specific ions; different ion exchange membranes can also be used in each dialysis cell, so as to selectively separate different ions and improve the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a front view of the electrodialysis testing device of this embodiment;

[0018] Figure 2 is a top view of the electrodialysis testing device of this embodiment;

[0019] Figure 3 is a left side view of the electrodialysis testing device of this embodiment;

[0020] Figure 4 It is a top view of the electrodialysis unit in the electrodialysis testing device of this embodiment.

[0021] In the figure, 1. centrifugal pump; 2. inlet pipeline; 3. electric control cabinet; 4. bracket; 5. electrodialysis unit; 51. dialysis tank; 52. electric field generator; 53. ion exchange membrane; 54. output liquid drain pipe; 55. concentrated water drain pipe; 6. check valve; 7. core filter; 8. pump outlet pressure gauge; 9. electrodialysis inlet pressure gauge; 10. diaphragm valve; 11. control unit; 12. flow sensor. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings. Example

[0023] Reference Figures 1 to 4 The electrodialysis test device disclosed in the utility model comprises a bracket 4 and an electric control cabinet 3 fixedly connected to the top of the bracket 4, wherein the electric control cabinet 3 has a built-in controller. Five centrifugal pumps 1 are fixedly connected to the top of the bracket 4, and the input end of the centrifugal pump 1 is connected to an inlet pipeline 2, and the raw liquid is pumped into the corresponding centrifugal pump 1 through the corresponding inlet pipeline 2. Five core filters 7 are fixedly connected to the top of the bracket 4, and the output end of the centrifugal pump 1 is connected to the corresponding core filter 7. Five electrodialysis units 5 are fixedly connected to the top of the bracket 4, and the output end of the core filter 7 is connected to the input end of the corresponding electrodialysis unit 5 through the control unit 11.

[0024] In this embodiment, the core filter 7 is used to filter the raw liquid to remove impurities. When the centrifugal pump 1 is working, the salt-containing raw liquid is pumped into the centrifugal pump 1 through the inlet pipe 2, and the raw liquid passes through the core filter 7 and the control unit 11 and enters the electrodialysis unit 5. The electrodialysis unit 5 filters the raw liquid and discharges the required output liquid and the filtered concentrated water.

[0025] The output liquid can enter another electrodialysis unit 5 through another inlet pipeline 2, and then be electrodialyzed and filtered again to produce the required output liquid, and then the next cycle is carried out until the qualified filtrate is finally produced. In this way, the graded filtration of the raw liquid is realized, and the desalination rate of the raw liquid is improved.

[0026] In a further preferred embodiment of the present invention, Figure 4As shown, the electrodialysis unit 5 includes a dialysis cell 51 and an electric field generator 52 and an ion exchange membrane 53 arranged in the dialysis cell 51. The output end of the core filter 7 is connected to the dialysis cell 51. The electric field generator 52 applies an electric field to the dialysis cell 51. The ion exchange membrane 53 divides the interior of the dialysis cell 51 into two areas, and the outer wall of the dialysis cell 51 is located on opposite sides of the ion exchange membrane 53 and is fixedly provided with a produced liquid drainage pipe 54 and a concentrated water drainage pipe 55.

[0027] In this embodiment, the raw liquid enters the dialysis cell 51 and is affected by the electric field. Specific ions pass through the ion exchange membrane 53 and are discharged from the dialysis cell 51 through the concentrated water drain pipe 55. The remaining output liquid is discharged through the output liquid drain pipe 54 and the next electrodialysis operation is carried out until the output liquid meets the requirements.

[0028] During multiple electrodialysis processes, different ion exchange membranes 53 can be used in each dialysis cell 51, so as to selectively separate different ions and improve the separation effect. At the same time, since the stock solution passes through each dialysis cell 51 in turn for multi-stage separation, the use of the same ion exchange membrane 53 can improve the separation efficiency of specific ions.

[0029] Furthermore, the raw liquid can be pumped into a suitable dialysis cell 51 and matched with a suitable ion exchange membrane 53 according to the different water qualities of the raw liquid, thereby reducing the concentration polarization phenomenon.

[0030] In a further preferred embodiment of the present invention, Figure 1 As shown, the control unit 11 includes a pump outlet pressure gauge 8, a diaphragm valve 10 and an electrodialysis inlet pressure gauge 9 which are sequentially arranged on the pipeline between the core filter 7 and the electrodialysis unit 5. The pump outlet pressure gauge 8 and the electrodialysis inlet pressure gauge 9 display the raw liquid pressure, and the diaphragm valve 10 adjusts the pressure and flow of the raw liquid.

[0031] In this embodiment, the pressure and flow rate of each electrodialysis flow channel can be independently controlled through the corresponding diaphragm valve 10 to adapt to the processing requirements of different stages, thereby optimizing the entire electrodialysis process.

[0032] In a further preferred embodiment of the present invention, Figure 1 As shown, a check valve 6 is fixedly connected to the outer peripheral side of the pipeline between the output end of the centrifugal pump 1 and the input end of the core filter 7.

[0033] In this embodiment, the check valve 6 refers to a valve whose opening and closing member is a circular valve disc and which relies on its own weight and medium pressure to produce a movement to block the backflow of the medium, thereby preventing the original liquid from flowing back.

[0034] In a further preferred embodiment of the present invention, Figure 1As shown, a flow sensor 12 is fixedly connected to the outer peripheral side of the pipeline between the diaphragm valve 10 and the electrodialysis inlet pressure gauge 9, and the flow sensor 12 and the centrifugal pump 1 are both electrically connected to the controller.

[0035] In this embodiment, the flow state is monitored by the flow sensor 12. When the flow is lower than or higher than the specified value, the controller controls the centrifugal pump 1 to stop working, thereby avoiding equipment damage caused by the flow not meeting the requirements.

[0036] The implementation principle of the above embodiment is:

[0037] The raw liquid enters the corresponding centrifugal pump 1 through the corresponding inlet pipeline 2. The centrifugal pump 1 pumps the raw liquid through the check valve 6, the core filter 7, the centrifugal pump 1 outlet pressure gauge, the diaphragm valve 10 and the electrodialysis inlet pressure gauge 9 into the dialysis cell 51. The diaphragm valve 10 controls the pressure and flow rate to meet the treatment requirements at different stages. The flow sensor 12 monitors the flow state. When the flow is lower than or higher than the specified value, the centrifugal pump 1 is controlled by the controller to stop working.

[0038] The raw liquid enters the dialysis cell 51 and is affected by the electric field. Specific ions pass through the ion exchange membrane 53 and are discharged from the dialysis cell 51 through the concentrated water drain pipe 55. The remaining output liquid is discharged through the output liquid drain pipe 54 for the next electrodialysis operation until a qualified filtrate is finally produced.

[0039] In this example, different centrifugal pumps 1 are used to pump the stock solution into the corresponding dialysis tank 51 according to the different salt content of the stock solution. The output liquid after the dialysis is completed is then pumped into another dialysis tank 51 through other centrifugal pumps 1 until the qualified filtrate is finally produced, thereby achieving graded filtration of the stock solution and improving the desalination rate of the stock solution. The stock solution can be pumped into a suitable dialysis tank 51 according to the different water quality of the stock solution to match the appropriate ion exchange membrane 53, thereby reducing the concentration polarization phenomenon. Since the stock solution is sequentially separated in multiple stages through each dialysis tank 51, the separation efficiency of specific ions is improved; different ion exchange membranes 53 can also be used in each dialysis tank 51, so as to selectively separate different ions and improve the separation effect.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An electrodialysis test device, comprising a bracket (4) and an electric control cabinet (3) fixedly connected to the top of the bracket (4), wherein the electric control cabinet (3) has a built-in controller, characterized in that: Five centrifugal pumps (1) are fixedly connected to the top of the bracket (4); the input end of the centrifugal pump (1) is connected to an inlet pipeline (2); the raw liquid is pumped into the corresponding centrifugal pump (1) through the corresponding inlet pipeline (2); five core filters (7) are fixedly connected to the top of the bracket (4); the output end of the centrifugal pump (1) is connected to the corresponding core filter (7); five electrodialysis units (5) are fixedly connected to the top of the bracket (4); the output end of the core filter (7) is connected to the input end of the corresponding electrodialysis unit (5) through the control unit (11).

2. The electrodialysis testing device according to claim 1, characterized in that: The electrodialysis unit (5) comprises a dialysis cell (51) and an electric field generator (52) and an ion exchange membrane (53) arranged in the dialysis cell (51); the output end of the core filter (7) is connected to the dialysis cell (51); the electric field generator (52) applies an electric field to the dialysis cell (51); the ion exchange membrane (53) divides the interior of the dialysis cell (51) into two areas; and an output liquid drainage pipe (54) and a concentrated water drainage pipe (55) are fixedly penetrated on the outer wall of the dialysis cell (51) at opposite sides of the ion exchange membrane (53).

3. The electrodialysis testing device according to claim 2, characterized in that: The control unit (11) includes a pump outlet pressure gauge (8), a diaphragm valve (10) and an electrodialysis inlet pressure gauge (9) which are sequentially arranged on the pipeline between the core filter (7) and the electrodialysis unit (5); the pump outlet pressure gauge (8) and the electrodialysis inlet pressure gauge (9) display the raw liquid pressure, and the diaphragm valve (10) adjusts the pressure and flow of the raw liquid.

4. The electrodialysis testing device according to claim 3, characterized in that: A check valve (6) is fixedly connected to the outer peripheral side of the pipeline between the output end of the centrifugal pump (1) and the input end of the core filter (7).

5. The electrodialysis testing device according to claim 4, characterized in that: A flow sensor (12) is fixedly connected to the outer peripheral side of the pipeline between the diaphragm valve (10) and the electrodialysis inlet pressure gauge (9), and the flow sensor (12) and the centrifugal pump (1) are both electrically connected to a controller.

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