Electrodialysis device with automatic hydraulic station

Abstract

The utility model discloses an electrodialysis device with an automatic hydraulic station, and belongs to the field of electrodialysis devices. The hydraulic cylinder is connected with the electrodialysis assembly; an oil tank; one end of the pump body is communicated with the oil tank; the inlet end of the one-way valve is communicated with the other end of the pump body, and the outlet end of the one-way valve is communicated with the hydraulic cylinder; one end of the pressure sensor is communicated with the oil tank, and the other end of the pressure sensor is communicated between the outlet end of the one-way valve and the hydraulic cylinder; one end of the electromagnetic valve is communicated with the oil tank, and the other end of the electromagnetic valve is communicated between the outlet end of the one-way valve and the hydraulic cylinder; and the controller is electrically connected with the pressure sensor and the electromagnetic valve. The utility model has the technical effects that the pressure can be automatically controlled conveniently, and the pressure can be prevented from being too large or too small.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electrodialysis device, especially an electrodialysis device with an automatic hydraulic station. BACKGROUND

[0002] The electrodialysis device is a device for separating charged substances from a solution under the action of a direct current field based on electrochemical principles.

[0003] In order to ensure the sealing property, the related electrodialysis device generally adopts a hydraulic assembly to compress the membrane stack, but in the long-term operation process, the pressure of the hydraulic assembly will gradually decrease, leading to the gradual failure of the sealing between the inside and outside of the membrane stack, and the membrane stack needs to be re-pressurized, or when the room temperature and the operation temperature are quite different in winter, or when the membrane stack swells due to material changes, the locking pressure of the membrane stack is easily increased and even the deformation of the membrane stack is caused. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an electrodialysis device with an automatic hydraulic station, which is convenient for realizing the automatic control of the pressure and preventing the pressure from being too large or too small.

[0005] TECHNICAL SCHEME

[0006] An electrodialysis device with an automatic hydraulic station comprises:

[0007] An electrodialysis assembly;

[0008] A hydraulic cylinder connected with the electrodialysis assembly;

[0009] An oil tank;

[0010] A pump body, one end of the pump body being communicated with the oil tank;

[0011] A one-way valve, an inlet end of the one-way valve being communicated with the other end of the pump body, and an outlet end of the one-way valve being communicated with the hydraulic cylinder;

[0012] A pressure sensor, one end of the pressure sensor being communicated with the oil tank, and the other end of the pressure sensor being communicated between the outlet end of the one-way valve and the hydraulic cylinder;

[0013] A solenoid valve, one end of the solenoid valve being communicated with the oil tank, and the other end of the solenoid valve being communicated between the outlet end of the one-way valve and the hydraulic cylinder;

[0014] A controller electrically connected with the pressure sensor and the solenoid valve.

[0015] Optionally, the device further comprises:

[0016] An adjusting valve communicated between one end of the solenoid valve and the oil tank;

[0017] a safety valve, one end of which is connected between the inlet end of the one-way valve and the other end of the pump body, and the other end of which is connected between the regulating valve and the oil tank;

[0018] Wherein, the regulating valve and the controller are electrically connected.

[0019] Optionally, also include:

[0020] a manual pressure relief valve connected between one end of the pressure sensor and the oil tank;

[0021] an accumulator and an electric contact pressure gauge, both of which are connected to the other end of the pressure sensor and the connection point between the outlet end of the one-way valve and the hydraulic cylinder;

[0022] Wherein, the electric contact pressure gauge is electrically connected to the controller.

[0023] Optionally, the electrodialysis assembly includes:

[0024] frame;

[0025] a fixed pressure plate fixedly connected to the frame;

[0026] a movable pressure plate movably connected to the frame;

[0027] A plurality of membrane stacks are movably connected to the frame, and the plurality of membrane stacks are located between the fixed pressure plate and the movable pressure plate;

[0028] Wherein, the cylinder body of the hydraulic cylinder is connected to the frame body, and the piston rod of the hydraulic cylinder is connected to the movable pressure plate.

[0029] Optionally, the membrane stack includes:

[0030] Positive water distribution board;

[0031] a plurality of ion exchange membranes and a plurality of separators arranged at intervals;

[0032] Negative water distribution board;

[0033] Wherein, the multiple ion exchange membranes and the multiple separators arranged at intervals are all located between the positive electrode water distribution plate and the negative electrode water distribution plate.

[0034] Optionally, it further includes a DC voltage collector electrically connected to the controller, and the DC voltage collector is electrically connected to the positive electrode water distribution plate and the negative electrode water distribution plate.

[0035] Optionally, a rangefinder electrically connected to the controller is also included.

[0036] Optionally, the pump body includes:

[0037] Motor;

[0038] Plunger pump connected with a drive shaft of the motor;

[0039] One end of the plunger pump is communicated with the oil tank, and the other end of the plunger pump is communicated with the inlet end of the one-way valve.

[0040] Optionally, the hydraulic valve block, the one-way valve, the electromagnetic valve and the pressure sensor are connected with the hydraulic valve block.

[0041] Optionally, the controller is a PLC controller or a DCS controller.

[0042] Beneficial effects: the electro-dialysis device with an automatic hydraulic station of the application can realize automatic control of the pressure of the automatic hydraulic station through the one-way valve, the pressure sensor, the electromagnetic valve and the controller, prevent the pressure of the automatic hydraulic station from being too large or too small, and avoid deformation or sealing failure of the membrane stack of the electro-dialysis assembly. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a structure schematic view of an electro-dialysis device with an automatic hydraulic station of embodiment 1 of the application;

[0044] Figure 2 It is a structure schematic view of an automatic hydraulic station of embodiment 1 of the application;

[0045] Figure 3 It is a hydraulic connection view of an automatic hydraulic station of embodiment 1 of the application;

[0046] Figure 4 It is a collection principle view of a direct-current voltage collector of embodiment 1 of the application;

[0047] In the figure: 1, electro-dialysis assembly; 11, frame body; 12, fixed pressure disc; 13, movable pressure disc; 14, membrane stack; 141, positive water distribution plate; 142, negative water distribution plate; 143, ion exchange membrane; 144, partition plate; 2, automatic hydraulic station; 200, oil tank; 201, pump body; 2011, motor; 2012, plunger pump; 202, one-way valve; 203, pressure sensor; 204, electromagnetic valve; 205, controller; 206, regulating valve; 207, safety valve; 208, manual pressure relief valve; 209, energy accumulator; 210, electric contact pressure gauge; 211, hydraulic oil pipe; 212, direct-current voltage collector; 213, range finder; 214, hydraulic valve block; 215, hydraulic cylinder; 2151, cylinder body; 2152, piston rod; 41, communication cable; 42, upper computer. DETAILED DESCRIPTION

[0048] In order to make the technical scheme of the utility model more clear, the utility model will be explained in further detail in combination with the drawings and specific embodiments.

[0049] Embodiment 1

[0050] As Figure 1 - Figure 3 The embodiment provides an electrodialysis device with an automatic hydraulic station, which comprises an electrodialysis assembly 1, a hydraulic cylinder 215 connected with the electrodialysis assembly 1, an oil tank 200, a pump body 201, one end of the pump body 201 being communicated with the oil tank 200, a one-way valve 202, an inlet end of the one-way valve 202 being communicated with the other end of the pump body 201, an outlet end of the one-way valve 202 being communicated with the hydraulic cylinder 215, a pressure sensor 203, one end of the pressure sensor 203 being communicated with the oil tank 200, the other end of the pressure sensor 203 being communicated between the outlet end of the one-way valve 202 and the hydraulic cylinder 215, an electromagnetic valve 204, one end of the electromagnetic valve 204 being communicated with the oil tank 200, the other end of the electromagnetic valve 204 being communicated between the outlet end of the one-way valve 202 and the hydraulic cylinder 215, and a controller 205 electrically connected with the pressure sensor 203 and the electromagnetic valve 204.

[0051] Specifically, in working, when the pressure sensor 203 detects that the pressure of the automatic hydraulic station 2 is lower than a low point, the pressure sensor 203 transmits a low point pressure signal to the controller 205, the controller 205 starts the pump body 201 so that the hydraulic oil in the oil tank 200 flows into the hydraulic cylinder 215 through the one-way valve 202, until the pressure sensor 203 detects that the pressure of the automatic hydraulic station 2 rises to a high point, the pressure sensor 203 transmits a high point pressure signal to the controller 205, and the controller 205 stops the pump body 201; when the pressure sensor 203 detects that the pressure of the automatic hydraulic station 2 is higher than a high high point, the pressure sensor 203 transmits a high high point pressure signal to the controller 205, the controller 205 starts the electromagnetic valve 204, so that part of the hydraulic oil in the hydraulic cylinder 215 flows into the oil tank 200 through the electromagnetic valve 204, until the pressure sensor 203 detects that the pressure of the automatic hydraulic station 2 drops to the high point, and the controller 205 stops the electromagnetic valve 204; in summary, the electrodialysis device with the automatic hydraulic station 2 of the embodiment can realize the automatic control of the pressure of the automatic hydraulic station 2 through the one-way valve 202, the pressure sensor 203, the electromagnetic valve 204 and the controller 205, so that the pressure of the automatic hydraulic station 2 is prevented from being too large or too small, thereby avoiding the deformation or sealing failure of the membrane stack 14 of the electrodialysis assembly 1;

[0052] Among them, the electrodialysis component 1 is used to separate the charged substances from the solution, and specifically may include a membrane stack 14, etc.; the pump body 201 is used to realize the transmission of hydraulic oil; the oil tank 200 is used to store the hydraulic oil, and the capacity of the oil tank 200 is preferably 15L; the one-way valve 202 is used to realize the one-way conduction between the other end of the pump body 201 and the hydraulic cylinder 215, and the one-way valve 202 may be a spring-type one-way valve, a swing-type one-way valve, etc.; the pressure sensor 203 is used to detect the pressure of the automatic hydraulic station 2 and transmit the pressure signal to the controller 205. The pressure sensor 20 3 can be a piezoresistive pressure sensor, a capacitive pressure sensor, etc.; the solenoid valve 204 is used to control the opening and closing through the controller 205 to facilitate pressure relief; the controller 205 is used to control the pressure sensor 203 and the solenoid valve 204, and set the low point, high point and high-high point of the pressure, wherein the low point is smaller than the high point and smaller than the high-high point. The controller 205 is preferably a PLC controller or a DCS controller; the oil tank 200, the pump body 201, the pressure sensor 203 and the solenoid valve 204 constitute the automatic hydraulic station 2, and the hydraulic oil is specifically transmitted through the hydraulic oil pipe 211.

[0053] Further, such as Figure 2 - Figure 3 , also includes: a regulating valve 206 connected between one end of the solenoid valve 204 and the oil tank 200; a safety valve 207, one end of the safety valve 207 is connected between the inlet end of the one-way valve 202 and the other end of the pump body 201, and the other end of the safety valve 207 is connected between the regulating valve 206 and the oil tank 200; wherein the regulating valve 206 and the controller 205 are electrically connected.

[0054] Specifically, the regulating valve 206 is controlled by the controller 205 to ensure that the pressure value will not drop too quickly and cause system instability during the process of the solenoid valve 204 opening to reduce the pressure; the safety valve 207 is used to increase safety. When the pressure of the automatic hydraulic station 2 exceeds the safety pressure, the safety valve 207 automatically opens. The safety valve 207 can be a spring-type safety valve, a lever-type safety valve, etc.

[0055] Further, such as Figure 2 - Figure 3 , also includes: a manual pressure relief valve 208 connected between one end of the pressure sensor 203 and the oil tank 200; an accumulator 209 and an electric contact pressure gauge 210, both of which are connected between the other end of the pressure sensor 203 and the connection point between the outlet end of the one-way valve 202 and the hydraulic cylinder 215; wherein the electric contact pressure gauge 210 and the controller 205 are electrically connected.

[0056] Specifically, the manual pressure relief valve 208 is used for manual pressure relief, further ensuring safety, and the manual pressure relief valve 208 can be a butterfly valve, a ball valve or the like; the accumulator 209 is used as a buffer device, can reduce the high peak and valley value of the pressure of the automatic hydraulic station 2, and improve the stability of the automatic hydraulic station 2, and the capacity of the accumulator 209 is preferably 1.25L; the electric contact pressure gauge 210 can specifically set two protection points, and display the current pressure of the automatic hydraulic station 2, and when the pressure of the automatic hydraulic station 2 is not within the range of the two points, an alarm signal can be transmitted to the controller 205.

[0057] Further, as Figure 1 , the electrodialysis assembly 1 comprises a frame body 11, a fixed pressure plate 12 fixedly connected with the frame body 11, a movable pressure plate 13 movably connected with the frame body 11, and a plurality of membrane stacks 14 movably connected with the frame body 11, wherein the plurality of membrane stacks 14 are located between the fixed pressure plate 12 and the movable pressure plate 13; wherein the cylinder body 2151 of the hydraulic cylinder 215 is connected with the frame body 11, and the piston rod 2152 of the hydraulic cylinder 215 is connected with the movable pressure plate 13.

[0058] Specifically, in operation, the piston rod 2152 of the hydraulic cylinder 215 drives the movable pressure plate 13 to move along the frame body 11, so that the plurality of membrane stacks 14 are pressed between the movable pressure plate 13 and the fixed pressure plate 12, thereby ensuring the sealing property of the membrane stacks 14.

[0059] Further, as Figure 1 , the membrane stack 14 comprises a positive water distribution plate 141, a plurality of ion exchange membranes 143 and a plurality of separators 144 arranged at intervals, and a negative water distribution plate 142, wherein the plurality of ion exchange membranes 143 and the plurality of separators 144 arranged at intervals are located between the positive water distribution plate 141 and the negative water distribution plate 142.

[0060] Specifically, the ion exchange membrane 143 is used for separating charged substances from a solution under the action of a direct current electric field, and specifically includes a cation membrane and an anion membrane; the separator 144 is used for separating the cation membrane and the anion membrane, facilitating the formation of a water flow channel, and playing a role of water distribution and water collection; the positive water distribution plate 141 and the negative water distribution plate 142 are used for supplying direct current, and simultaneously introducing and discharging raw water, fresh water and concentrated water.

[0061] Further, as Figure 2 and Figure 4 , it further comprises a direct current voltage collector 212 electrically connected with the controller 205, and the direct current voltage collector 212 is electrically connected with the positive water distribution plate 141 and the negative water distribution plate 142.

[0062] Specifically, the direct current voltage collector 212 is used to detect the direct current voltage of the plurality of membrane stacks 14, and transmit the direct current voltage values of the plurality of membrane stacks 14 to the controller 205 in the Mobbus RTU communication protocol, the controller 205 further analyzes and processes the direct current voltage values of the plurality of membrane stacks 14, the controller 205 can also be electrically connected with the related host computer 42, so as to understand the direct current voltage values of the plurality of membrane stacks 14 on the host computer 42, and also to understand the trend chart and data report of the direct current voltage values of the plurality of membrane stacks 14 on the host computer 42, which is convenient for problem tracing and fault troubleshooting, and also convenient for generating water inlet abnormality early warning by the rising speed of the direct current voltage values of the plurality of membrane stacks 14 per unit time through the algorithm in the controller 205 to determine whether it is caused by water inlet abnormality, reduce the loss caused by abnormality, and also convenient for generating direct current voltage value difference overrun early warning by comparing the direct current voltage values of the plurality of membrane stacks 14 with each other through the algorithm in the controller 205 to determine which membrane stack 14 has a problem.

[0063] When the controller 205 is a PLC controller, the direct current voltage collector 212 is arranged in the cabinet of the PLC controller, the output end of the direct current voltage collector 212 is connected with the Modbus RTU PLC communication module in the cabinet of the PLC controller through the communication cable 41, the input end of the direct current voltage collector 212 is connected with the voltage detection points on both sides of the plurality of membrane stacks 14 through the multi-core shielding line, the PLC controller is programmed according to the communication protocol of the direct current voltage collector 212, reads the voltage data of the direct current voltage collector 212, and sets the early warning algorithm in the program of the PLC controller and sets the corresponding configuration in the host computer 42 picture, finally completes the direct current voltage value display and early warning of the plurality of membrane stacks 14.

[0064] Further, as shown in Figure 2 , the embodiment further comprises a distance meter 213 electrically connected with the controller 205. Specifically, the distance meter 213 is used to detect the distance between the movable pressure disc 13 and the fixed pressure disc 12 and transmit to the controller 205, and when the distance value abnormally changes, an alarm is sent to remind the technician to check the running condition of the electrodialysis device with the automatic hydraulic station 2 of the embodiment, wherein the distance meter 213 is preferably a laser distance meter with an accuracy of 1mm.

[0065] Further, as shown in Figure 2 - Figure 3 , the pump body 201 comprises: a motor 2011; a plunger pump 2012 connected with the driving shaft of the motor 2011; wherein one end of the plunger pump 2012 is communicated with the oil tank 200, and the other end of the plunger pump 2012 is communicated with the inlet end of the one-way valve 202. Specifically, the driving shaft of the motor 2011 is used to drive the plunger pump 2012; the plunger pump 2012 is used to transmit hydraulic oil.

[0066] Further, as shown inFigure 2 The hydraulic valve block 214 is connected with the one-way valve 202, the electromagnetic valve 204 and the pressure sensor 203.

[0067] Specifically, in the working process, a BL3T-50-320 type electrodialysis device is applied in a plateau area, and the winter room temperature is low, i.e. 3-10 DEG C. The incoming material is processed at 27 DEG C. With the running of the electrodialysis device, the temperature of the material gradually rises from the room temperature to the material temperature, the membrane stack 14 expands, and the hydraulic pressure rises. After the device is stopped, the membrane stack 14 gradually cools and shrinks, and the hydraulic pressure gradually decreases. After a long period of operation, the membrane stack 14 deforms and then leaks after repeated expansion and contraction. After the original electrodialysis device is modified into the electrodialysis device with the automatic hydraulic station 2, the hydraulic pressure is stabilized within the set value ± 1%, and the safe and stable operation of the device is ensured.

[0068] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An electrodialysis unit with an automatic hydraulic station, characterized in that, The application relates to an electro-dialysis assembly (1), a hydraulic cylinder (215) connected with the electro-dialysis assembly (1), an oil tank (200), a pump body (201) with one end communicated with the oil tank (200), a one-way valve (202) with an inlet end communicated with the other end of the pump body (201) and an outlet end communicated with the hydraulic cylinder (215), a pressure sensor (203) with one end communicated with the oil tank (200) and the other end communicated between the outlet end of the one-way valve (202) and the hydraulic cylinder (215), an electromagnetic valve (204) with one end communicated with the oil tank (200) and the other end communicated between the outlet end of the one-way valve (202) and the hydraulic cylinder (215), and a controller (205) electrically connected with the pressure sensor (203) and the electromagnetic valve (204). The application further comprises an adjusting valve (206) communicated between one end of the electromagnetic valve (204) and the oil tank (200), a safety valve (207) with one end communicated between the inlet end of the one-way valve (202) and the other end of the pump body (201) and the other end communicated between the adjusting valve (206) and the oil tank (200), wherein the adjusting valve (206) is electrically connected with the controller (205). The application further comprises a manual pressure relief valve (208) communicated between one end of the pressure sensor (203) and the oil tank (200), an energy accumulator (209) and an electric contact pressure gauge (210) both communicated between the other end of the pressure sensor (203) and the communication position of the outlet end of the one-way valve (202) and the hydraulic cylinder (215), wherein the electric contact pressure gauge (210) is electrically connected with the controller (205). The electro-dialysis assembly (1) comprises a frame body (11), a fixed pressure plate (12) fixedly connected with the frame body (11), a movable pressure plate (13) movably connected with the frame body (11), and a plurality of membrane stacks (14) all movably connected with the frame body (11) and located between the fixed pressure plate (12) and the movable pressure plate (13), wherein a cylinder body (2151) of the hydraulic cylinder (215) is connected with the frame body (11), and a piston rod (2152) of the hydraulic cylinder (215) is connected with the movable pressure plate (13). The membrane stack (14) comprises a positive water distribution plate (141), a plurality of ion exchange membranes (143) and a plurality of separators (144) arranged at intervals, and a negative water distribution plate (142), wherein the plurality of ion exchange membranes (143) and the plurality of separators (144) arranged at intervals are located between the positive water distribution plate (141) and the negative water distribution plate (142). ​ ​ ​ ​ 2. An apparatus for electrodialysis with an automatic hydraulic station according to claim 1, characterized in that ​ ​ ​ ​ 3. An apparatus for electrodialysis with an automatic hydraulic station according to claim 1, characterized in that ​ ​ ​ ​ 4. An apparatus according to any one of claims 1 to 3, wherein the apparatus comprises a hydraulic station. ​ ​ ​ ​ ​ ​ 5. The electrodialysis device with an automatic hydraulic station according to claim 4, characterized in that: ​ ​ ​ ​ ​ 6. An apparatus for electrodialysis with an automatic hydraulic station according to claim 5, characterized in that A direct-current voltage collector (212) is also electrically connected to the controller (205), and the direct-current voltage collector (212) is electrically connected to the positive water distribution plate (141) and the negative water distribution plate (142).

7. The electrodialysis device with an automatic hydraulic station according to claim 4, characterized in that: A range finder (213) is also electrically connected to the controller (205).

8. An apparatus for electrodialysis with an automatic hydraulic station according to any one of claims 1-3, characterized in that, The pump body (201) comprises: A motor (2011); A plunger pump (2012) connected to the drive shaft of the motor (2011); One end of the plunger pump (2012) is in communication with the oil tank (200), and the other end of the plunger pump (2012) is in communication with the inlet end of the one-way valve (202).

9. An apparatus for electrodialysis with an automatic hydraulic station according to any one of claims 1-3, characterized in that, A hydraulic valve block (214) is also connected to the one-way valve (202), the electromagnetic valve (204), and the pressure sensor (203).

10. An apparatus for electrodialysis with an automatic hydraulic station according to any one of claims 1-3, characterized in that, The controller (205) is a PLC controller or a DCS controller.

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