Ionic membrane caustic soda light salt brine recovery device

Abstract

The invention relates to an ionic membrane caustic soda light salt brine recovery device which comprises a brush type impurity filtering module, a bag type impurity filtering module, a reverse osmosis membrane filter and a filling module which are connected in series front and back to form the recovery device. Impurity ions in the light salt brine are removed through the brush type impurity filtering module and the bag type impurity filtering module, and the light salt brine subjected to impurity removal is concentrated and recycled through the reverse osmosis membrane filter and the filling module. According to the technical scheme, the structure is reasonable, light salt brine with impurities can be effectively treated, impurities are removed as much as possible, the purity is improved, the light salt brine is closer to the quality standard of primary salt water, and recycling is facilitated.

Description

Technical Field

[0001] The invention relates to the chlor-alkali industry, and in particular to the field of ion membrane caustic soda brine recovery. Background Art

[0002] In the production process of ion membrane caustic soda, electrolysis of salt water will produce caustic soda (sodium hydroxide), chlorine and hydrogen. In the salt water coming out of the electrolyzer, part of the sodium chloride has been converted into caustic soda, and the remaining salt water is desalinated brine, which mainly contains sodium chloride, a small amount of unreacted sodium hydroxide, sodium sulfate and other impurities. If these impurities are not effectively treated, they will affect the recycling of brine and the performance of ion membrane electrolyzers; how to treat desalinated brine with impurities to remove impurities as much as possible and improve purity, so as to be closer to the quality standard of primary brine and facilitate recycling is a problem that industry insiders need to solve. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide an ion membrane caustic soda salt water recovery device, comprising a brush-type impurity filter module, a bag-type impurity filter module, a reverse osmosis membrane filter and a filling module, wherein the brush-type impurity filter module, the bag-type impurity filter module, the reverse osmosis membrane filter and the filling module are connected in series to form a recovery device, wherein the impurity ions in the salt water are removed by the brush-type impurity filter module and the bag-type impurity filter module, and the salt water after impurity removal is concentrated and recovered by the reverse osmosis membrane filter and the filling module; The brush impurity filtering module comprises a brush impurity filtering collection kettle and an impurity filtering brush component, the impurity filtering brush component is rotatably arranged in the inner cavity of the brush impurity filtering collection kettle, the brush impurity filtering collection kettle has a brush impurity filtering collection kettle inlet and a brush impurity filtering collection kettle outlet, and the brush impurity filtering module is connected with the bag impurity filtering module through the brush impurity filtering collection kettle outlet; The bag impurity filter module comprises a bag impurity filter collection kettle, in which a bag filter component is fixedly installed in the inner cavity of the bag impurity filter collection kettle, and the bag impurity filter collection kettle also has a bag impurity filter collection kettle inlet and a bag impurity filter collection kettle outlet, the bag impurity filter collection kettle inlet is connected with the brush impurity filter collection kettle outlet, and the bag impurity filter module is connected with the reverse osmosis membrane filter through the bag impurity filter collection kettle outlet; The filling module comprises a filling component, and both ends of the filling component are provided with tank inlet and outlet components. Preferably, the inlet and outlet of the brush-type impurity filtering and collecting kettle are respectively arranged at the upper and lower ends of the brush-type impurity filtering and collecting kettle, and the impurity filtering brush component includes a sleeve fixedly arranged in the inner cavity of the brush-type impurity filtering and collecting kettle, and the upper and lower ends of the sleeve are respectively connected with the inlet and outlet of the brush-type impurity filtering and collecting kettle, and the inner cavity of the sleeve has a roller body, and the lower end of the sleeve body has a sleeve outlet frame, and the lower end of the roller body is rotatably arranged on the sleeve outlet frame through a bearing, and the upper end of the brush-type impurity filtering and collecting kettle is fixedly installed with a driving motor through a sealing cover, and the driving motor is drivingly connected to the upper end of the roller body, and at least one brush strip mounting block is evenly arranged on the roller body along the circumferential direction, one end of the brush strip is fixedly arranged on the brush strip mounting block, and the other end extends to the sleeve wall.

[0004] Preferably, a hollow mounting rod is detachably fixedly installed between the brush strip mounting block and the roller body, the rear end of the brush strip mounting block has a mounting end block inserted into the hollow mounting rod, the rod body of the hollow mounting rod has a retaining ring, and a compression spring is fixedly arranged between the mounting end block and the retaining ring.

[0005] Preferably, the inlet of the bag impurity filtering and collecting kettle and the outlet of the bag impurity filtering and collecting kettle are respectively arranged at the upper and lower ends of the bag impurity filtering and collecting kettle, and the upper end of the bag impurity filtering and collecting kettle also has a detachable sealing cover, the bag filter component is located in the inner cavity of the bag impurity filtering and collecting kettle and is located at the inlet of the bag impurity filtering and collecting kettle, the bag filter component has a lower liquid plate, the edge of the plate body of the lower liquid plate is sealed with the bag impurity filtering and collecting kettle, the plate body of the lower liquid plate is evenly provided with a plurality of lower liquid ports, and a filter bag component is detachably fixedly installed at each lower liquid port, the filter bag component passes through the lower liquid plate into the inner cavity of the bag impurity filtering and collecting kettle, the lower liquid plate is also provided with a liquid inlet channel connected to the inlet of the bag impurity filtering and collecting kettle, the bag impurity filtering and collecting kettle is connected with the filter liquid inlet end of the reverse osmosis membrane filter through the bag impurity filtering and collecting kettle outlet, and the filter liquid outlet end of the reverse osmosis membrane filter is connected with the filling module through the liquid storage tank and the booster pump.

[0006] Preferably, the filter bag component includes a filter bag component mounting ring and a filter bag, the filter bag is fixedly arranged at the lower end of the filter bag component mounting ring, the outer periphery of the filter bag component mounting ring is provided with a rotating locking block, the lower liquid plate is located at each lower liquid port and has a locking opening that matches the lower liquid plate, and the upper end of the filter bag component mounting ring is provided with a handle.

[0007] Preferably, the filling component and the inlet and outlet tank components at both ends are arranged in a straight line, the filling component includes a filling component base, a storage tank feeding platform is fixedly arranged on the filling component base, a feeding belt assembly driven by a driving motor is movably arranged at the upper and lower ends of the storage tank feeding platform, storage tank limiting rods are provided on both sides of the storage tank feeding platform, the inlet and outlet tank components are respectively arranged at the two ends of the storage tank feeding platform, the inlet and outlet tank components have inlet and outlet tank bases, the inlet and outlet tank components are located at the upper ends of the inlet and outlet tank bases and a storage tank transfer tray and a receiving tray driven by a motor are fixedly installed, the storage tank transfer tray is located at the end of the storage tank feeding platform corresponding thereto, and the filling component is located at the upper end of the storage tank feeding platform and a liquid injection component is fixedly installed.

[0008] Preferably, adjustment block seats are evenly arranged on both sides of the storage tank feeding platform from front to back, the limit rod adjustment block is movably arranged on the adjustment block seat by bolts, and the storage tank limit rod is embedded in the front end surface of the limit rod adjustment block.

[0009] Preferably, a plurality of storage tank body limit openings are evenly opened along the circumferential direction at the outer edge of the storage tank transfer plate, the front end of the receiving plate has a tank passing opening, and the rear end of the receiving plate has a tank inlet and outlet openings, the tank passing opening is located on the side of the storage tank transfer plate, and the tank passing opening matches the storage tank body limit opening in size.

[0010] By means of the above scheme, the present invention has at least the following advantages: The technical solution of the present application adopts a reverse osmosis membrane filter to treat the desalted salt water. In the treatment of desalted salt water, it can effectively remove impurities such as multivalent anions (such as sulfate ions) and some small molecular organic matter, and for desalted salt water containing a high concentration of sodium sulfate, reverse osmosis can also selectively block the passage of sulfate ions, thereby reducing the content of sulfate in the desalted salt water and reducing its accumulation in the salt water circulation system; it can also remove impurities such as heavy metal ions in the desalted salt water to prevent these impurities from damaging the ion membrane. The trace iron ions, lead ions and other heavy metals that may be contained in the desalted salt water can be significantly reduced after reverse osmosis treatment; reverse osmosis can improve the purity of the salt water, so that the treated desalted salt water is closer to the quality standard of the primary salt water, which is conducive to recycling. After reverse osmosis treatment, the sodium chloride concentration of the desalted salt water can be adjusted so that it can better re-enter the ion membrane electrolyzer for electrolysis, improve the utilization rate of sodium chloride, and reduce production costs.

[0011] However, the investment cost of reverse osmosis membrane filters is relatively high, and the costs of equipment procurement, installation and commissioning, as well as subsequent maintenance are relatively high. Therefore, the technical solution of this application adopts a brush-type impurity filtration module and a bag-type impurity filtration module as the pre-filter, firstly coarsely filtering the desalinated water to remove as many large particles of impurities as possible generated during the processing, to protect the reverse osmosis membrane filter and extend its service life.

[0012] The liquid outlet of the reverse osmosis membrane filter is connected to the filling module through a liquid storage tank and a booster pump. The purified brine can first be stored in the liquid storage tank. When the brine needs to be transported, it can be packaged through the filling module for easy transportation.

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show a certain embodiment of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the brush-type impurity filtering module of the present application; Figure 2 It is a three-dimensional structural schematic diagram of the impurity filtering brush component of the present application; Figure 3 It is a schematic diagram of the structural relationship between the brush strip mounting block, the brush strip, the hollow mounting rod, the end mounting block, the retaining ring and the compression spring of the present application; Figure 4 It is a three-dimensional structural schematic diagram of the bag-type impurity filtration module of the present application; Figure 5 It is a schematic diagram of the structural relationship between the bag-type impurity filtration collection kettle and the bag-type filtration component of the present application; Figure 6 It is a three-dimensional structural schematic diagram of the filter bag component of the present application; Figure 7 It is a schematic diagram of the three-dimensional structure of the reverse osmosis membrane filter of the present application; Figure 8 It is a three-dimensional structural schematic diagram of the filling module of the present application; Fig. 9 It is a partial enlarged structural schematic diagram of the filling module of the present application; Fig.10 This is another partial enlarged structural schematic diagram of the filling module of the present application.

[0016] In the figure: 1 brush impurity filter module, 2 bag impurity filter module, 3 reverse osmosis membrane filter, 4 filling module, 5 brush impurity filter collection kettle, 6 impurity filter brush component, 7 brush impurity filter collection kettle inlet, 8 brush impurity filter collection kettle outlet, 9 bag impurity filter collection kettle, 10 bag filter component, 11 bag impurity filter collection kettle inlet, 12 bag impurity filter collection kettle outlet, 13 filling component, 14 tank inlet and outlet components, 15 sleeve, 16 roller body, 17 sleeve outlet frame, 18 brush strip mounting block, 19 brush strip, 20 hollow mounting rod, 21 mounting end block, 22 retaining ring , 23 compression spring, 24 sealing cover, 25 lower liquid plate, 26 lower liquid port, 27 filter bag component, 28 liquid inlet channel, 29 filter bag component mounting ring, 30 filter bag, 31 rotary locking block, 32 handle, 33 filter liquid inlet end, 34 filter liquid outlet end, 35 filling component base, 36 storage tank feeding platform, 37 feeding belt assembly, 38 storage tank limiting rod, 39 tank inlet and outlet base, 40 storage tank transfer tray, 41 receiving tray, 42 adjusting block seat, 43 limiting rod adjusting block, 44 storage tank limiting port, 45 tank port, 46 tank inlet and outlet, liquid injection component, 47 liquid injection component. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] See also Figures 1 to 10 An ion membrane caustic soda salt water recovery device according to a preferred embodiment of the present invention comprises a brush-type impurity filter module 1, a bag-type impurity filter module 2, a reverse osmosis membrane filter 3 and a filling module 4. The brush-type impurity filter module 1, the bag-type impurity filter module 2, the reverse osmosis membrane filter 3 and the filling module 4 are connected in series to form a recovery device. The impurity ions in the salt water are removed by the brush-type impurity filter module 1 and the bag-type impurity filter module 2, and the salt water after impurity removal is concentrated and recovered by the reverse osmosis membrane filter 3 and the filling module 4. The brush-type impurity filtering module 1 comprises a brush-type impurity filtering and collecting kettle 5 and an impurity filtering brush component 6. The impurity filtering brush component 6 is rotatably arranged in the inner cavity of the brush-type impurity filtering and collecting kettle 5. The brush-type impurity filtering and collecting kettle 5 has a brush-type impurity filtering and collecting kettle inlet 7 and a brush-type impurity filtering and collecting kettle outlet 8. The brush-type impurity filtering module 1 is connected with the bag-type impurity filtering module 2 through the brush-type impurity filtering and collecting kettle outlet 8. The bag impurity filtering module 2 includes a bag impurity filtering and collecting kettle 9, in which a bag filtering component 10 is fixedly installed in the inner cavity of the bag impurity filtering and collecting kettle 9, and the bag impurity filtering and collecting kettle 9 also has a bag impurity filtering and collecting kettle inlet 11 and a bag impurity filtering and collecting kettle outlet 12, the bag impurity filtering and collecting kettle inlet 11 is connected with the brush impurity filtering and collecting kettle outlet 8, and the bag impurity filtering module 2 is connected with the reverse osmosis membrane filter 3 through the bag impurity filtering and collecting kettle outlet 12; The filling module 4 comprises a filling component 13 , and both ends of the filling component 13 are provided with an inlet and outlet tank component 14 . Preferably, the inlet 7 of the brush-type impurity filtering and collecting kettle and the outlet 8 of the brush-type impurity filtering and collecting kettle are respectively arranged at the upper and lower ends of the brush-type impurity filtering and collecting kettle 5, and the impurity filtering brush component 6 includes a sleeve 15 fixedly arranged in the inner cavity of the brush-type impurity filtering and collecting kettle 5, and the upper and lower ends of the sleeve 15 are respectively connected with the inlet 7 of the brush-type impurity filtering and collecting kettle and the outlet 8 of the brush-type impurity filtering and collecting kettle, and a roller body 16 is provided in the inner cavity of the sleeve 15, and a sleeve outlet frame 17 is provided at the lower end of the cylinder body of the sleeve 15, and the lower end of the roller body 16 is rotatably arranged on the sleeve outlet frame 17 through a bearing, and a driving motor is fixedly installed on the upper end of the brush-type impurity filtering and collecting kettle 5 through a cover, and the driving motor is drivingly connected to the upper end of the roller body 16, and at least one brush strip mounting block 18 is evenly arranged on the roller body 16 along the circumferential direction, and one end of the brush strip 19 is fixedly arranged on the brush strip mounting block 18, and the other end extends to the cylinder wall of the sleeve 15.

[0019] Preferably, a hollow mounting rod 20 is detachably fixedly installed between the brush strip mounting block 18 and the roller body 16, and the rear end of the brush strip mounting block 18 has a mounting end block 21 inserted into the hollow mounting rod 20, and the rod body of the hollow mounting rod 20 has a retaining ring 22, and a compression spring 23 is fixedly arranged between the mounting end block 21 and the retaining ring 22.

[0020] When the light salt water enters the inner cavity of the brush-type impurity filtering and collecting kettle 5, the motor can drive the roller 16 to rotate, and the brush bar 19 can rotate accordingly. The brush bar 19 can continuously rotate to sweep the light salt water in the inner cavity of the sleeve 15 and attach large particles of impurities. After the filtering is completed, the outlet 8 of the brush-type impurity filtering and collecting kettle can be opened to allow the light salt water to flow into the inlet 11 of the bag-type impurity filtering and collecting kettle.

[0021] Preferably, the bag impurity filtering and collecting kettle inlet 11 and the bag impurity filtering and collecting kettle outlet 12 are respectively arranged at the upper and lower ends of the bag impurity filtering and collecting kettle 9, and the upper end of the bag impurity filtering and collecting kettle 9 also has a detachable sealing cover 24, the bag filter component 10 is located in the inner cavity of the bag impurity filtering and collecting kettle 9 and is located at the bag impurity filtering and collecting kettle inlet 11, the bag filter component 10 has a lower liquid plate 25, the edge of the plate body of the lower liquid plate 25 is sealed and connected to the bag impurity filtering and collecting kettle 9, and the plate body of the lower liquid plate 25 is evenly provided with There are a plurality of lower liquid ports 26, each of which is detachably and fixedly provided with a filter bag component 27, the filter bag component 27 passes through the lower liquid plate 25 and enters the inner cavity of the bag-type impurity filtering and collecting kettle 9, the lower liquid plate 25 is also provided with a liquid inlet channel 28 communicating with the inlet 11 of the bag-type impurity filtering and collecting kettle, the bag-type impurity filtering and collecting kettle 9 is connected with the filter liquid inlet end 33 of the reverse osmosis membrane filter 3 through the bag-type impurity filtering and collecting kettle outlet 12, and the filter liquid outlet end 34 of the reverse osmosis membrane filter 3 is connected with the filling module 4 through the liquid storage tank and the booster pump.

[0022] Preferably, the filter bag assembly 27 includes a filter bag assembly mounting ring 29 and a filter bag 30, the filter bag 30 is fixedly arranged at the lower end of the filter bag assembly mounting ring 29, the outer periphery of the ring body of the filter bag assembly mounting ring 29 is provided with a rotating locking block 31, the lower liquid plate 25 is located at each lower liquid port 26 and has a locking opening that matches the lower liquid plate 25, and the upper end of the filter bag assembly mounting ring 29 is provided with a handle 32.

[0023] After the desalinated water enters the bag-type impurity filtering and collecting kettle inlet 11, it can enter between the lower liquid plate 25 and the sealing cover 24 through the liquid inlet channel 28. At this time, the desalinated water can only flow from top to bottom through the lower liquid port 26 and the filter bag component 27 to the bottom of the inner cavity of the bag-type impurity filtering and collecting kettle 9. At this time, various impurities in the desalinated water can be further filtered out by the filter bag component 27 to ensure that there are no large particles of impurities. This can further reduce the burden on the reverse osmosis membrane filter 3 and extend its service life.

[0024] Furthermore, the impurity filtering brush component 6 and the filter bag component 27 are both components that can be quickly disassembled, cleaned and replaced. Such a structure can not only achieve front-end filtering, but also reduce the use cost of the entire recovery device.

[0025] Preferably, the filling component 13 and the inlet and outlet tank components 14 at both ends thereof are arranged in a straight line, the filling component 13 includes a filling component base 35, a storage tank feeding platform 36 is fixedly provided on the filling component base 35, a feeding belt assembly 37 driven by a driving motor is movably provided at the upper and lower ends of the storage tank feeding platform 36, storage tank limiting rods 38 are provided on both sides of the storage tank feeding platform 36, the inlet and outlet tank components 14 are respectively provided at the two ends of the storage tank feeding platform 36, the inlet and outlet tank components 14 have inlet and outlet tank bases 39, the inlet and outlet tank components 14 are located at the upper end of the inlet and outlet tank bases 39, and a motor-driven storage tank transfer tray 40 and a receiving tray 41 are fixedly installed, the storage tank transfer tray 40 is located at the corresponding end of the storage tank feeding platform 36, and the filling component 13 is located at the upper end of the storage tank feeding platform 36 and a liquid injection component 47 is fixedly installed.

[0026] Preferably, adjustment block seats 42 are evenly arranged on both sides of the storage tank feeding platform 36 from front to back, the limit rod adjustment block 43 is movably arranged on the adjustment block seat 42 by bolts, and the storage tank limit rod 38 is embedded in the front end surface of the limit rod adjustment block 43.

[0027] Preferably, a plurality of storage tank body limit openings 44 are evenly opened along the circumferential direction at the outer edge of the storage tank transfer plate 40, the front end of the receiving plate 41 has a tank opening 45, and the rear end of the receiving plate 41 has a tank inlet and outlet openings 46. The tank opening 45 is located on the side of the storage tank transfer plate 40, and the tank opening 45 matches the size of the storage tank body limit opening 44.

[0028] The inlet and outlet tank components 14 at both ends respectively serve to feed in and out of the storage tank. The storage tank can be moved laterally at a uniform speed on the storage tank feeding platform 36 through the feeding belt assembly 37, and the storage tank can be injected with purified light salt water in conjunction with the liquid injection component 47.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An ion membrane caustic soda brine recovery device, characterized in that: The invention comprises a brush-type impurity filtration module (1), a bag-type impurity filtration module (2), a reverse osmosis membrane filter (3) and a filling module (4); the brush-type impurity filtration module (1), the bag-type impurity filtration module (2), the reverse osmosis membrane filter (3) and the filling module (4) are connected in series to form a recovery device; the impurity ions in the salt water are removed by the brush-type impurity filtration module (1) and the bag-type impurity filtration module (2); and the salt water after impurity removal is concentrated and recovered by the reverse osmosis membrane filter (3) and the filling module (4); The brush-type impurity filtering module (1) comprises a brush-type impurity filtering collection kettle (5) and an impurity filtering brush component (6); the impurity filtering brush component (6) is rotatably arranged in the inner cavity of the brush-type impurity filtering collection kettle (5); the brush-type impurity filtering collection kettle (5) has a brush-type impurity filtering collection kettle inlet (7) and a brush-type impurity filtering collection kettle outlet (8); the brush-type impurity filtering module (1) is connected to the bag-type impurity filtering module (2) via the brush-type impurity filtering collection kettle outlet (8); The bag impurity filter module (2) comprises a bag impurity filter collection kettle (9), a bag filter component (10) is fixedly installed in the inner cavity of the bag impurity filter collection kettle (9), the bag impurity filter collection kettle (9) also has a bag impurity filter collection kettle inlet (11) and a bag impurity filter collection kettle outlet (12), the bag impurity filter collection kettle inlet (11) is connected to the brush impurity filter collection kettle outlet (8), and the bag impurity filter module (2) is connected to the reverse osmosis membrane filter (3) through the bag impurity filter collection kettle outlet (12); The filling module (4) comprises a filling component (13), and both ends of the filling component (13) are provided with tank inlet and outlet components (14).

2. The ion membrane caustic soda brine recovery device according to claim 1 is characterized in that: The inlet (7) of the brush-type impurity filtering and collecting kettle and the outlet (8) of the brush-type impurity filtering and collecting kettle are respectively arranged at the upper and lower ends of the brush-type impurity filtering and collecting kettle (5); the impurity filtering brush component (6) comprises a sleeve (15) fixedly arranged in the inner cavity of the brush-type impurity filtering and collecting kettle (5); the upper and lower ends of the sleeve (15) are respectively connected to the inlet (7) of the brush-type impurity filtering and collecting kettle and the outlet (8) of the brush-type impurity filtering and collecting kettle; the inner cavity of the sleeve (15) comprises a roller body (16); the sleeve (15) ) has a sleeve outlet frame (17) at the lower end of the cylinder, the lower end of the roller body (16) is rotatably mounted on the sleeve outlet frame (17) via a bearing, the upper end of the brush-type impurity filtering and collecting kettle (5) is fixedly mounted with a drive motor via a cover, the drive motor is drivingly connected to the upper end of the roller body (16), at least one brush strip mounting block (18) is evenly arranged on the roller body (16) along the circumferential direction, one end of the brush strip (19) is fixedly mounted on the brush strip mounting block (18), and the other end extends to the wall of the sleeve (15).

3. The ion membrane caustic soda brine recovery device according to claim 2 is characterized in that: A hollow mounting rod (20) is detachably fixedly mounted between the brush strip mounting block (18) and the roller body (16); the rear end of the brush strip mounting block (18) comprises a mounting end block (21) inserted into the hollow mounting rod (20); the rod body of the hollow mounting rod (20) comprises a retaining ring (22); and a compression spring (23) is fixedly mounted between the mounting end block (21) and the retaining ring (22).

4. The ion membrane caustic soda brine recovery device according to claim 1, characterized in that: The bag impurity filter collection kettle inlet (11) and the bag impurity filter collection kettle outlet (12) are respectively arranged at the upper and lower ends of the bag impurity filter collection kettle (9); the upper end of the bag impurity filter collection kettle (9) also has a detachable sealing cover (24); the bag filter component (10) is located in the inner cavity of the bag impurity filter collection kettle (9) and at the bag impurity filter collection kettle inlet (11); the bag filter component (10) has a lower liquid plate (25); the edge of the plate body of the lower liquid plate (25) is sealed and connected to the bag impurity filter collection kettle (9); and the plate body of the lower liquid plate (25) is evenly provided with a plurality of lower liquid ports. (26), each lower liquid port (26) is detachably fixedly provided with a filter bag component (27), the filter bag component (27) passes through the lower liquid plate (25) and enters the inner cavity of the bag-type impurity filtering and collecting kettle (9), the lower liquid plate (25) is also provided with a liquid inlet channel (28) communicating with the bag-type impurity filtering and collecting kettle inlet (11), the bag-type impurity filtering and collecting kettle (9) is communicated with the filter liquid inlet end (33) of the reverse osmosis membrane filter (3) through the bag-type impurity filtering and collecting kettle outlet (12), and the filter liquid outlet end (34) of the reverse osmosis membrane filter (3) is communicated with the filling module (4) through the liquid storage tank and the booster pump.

5. The ion membrane caustic soda brine recovery device according to claim 4 is characterized in that: The filter bag component (27) comprises a filter bag component mounting ring (29) and a filter bag (30). The filter bag (30) is fixedly arranged at the lower end of the filter bag component mounting ring (29). The outer periphery of the ring body of the filter bag component mounting ring (29) is provided with a rotation locking block (31). The lower liquid plate (25) is provided with a locking opening matched with the lower liquid plate (25) at each lower liquid port (26). The upper end of the filter bag component mounting ring (29) is provided with a handle (32).

6. The ion membrane caustic soda brine recovery device according to claim 1 is characterized in that: The filling component (13) and the tank inlet and outlet components (14) at both ends thereof are arranged in a straight line. The filling component (13) comprises a filling component base (35). A storage tank feeding platform (36) is fixedly arranged on the filling component base (35). A feeding belt assembly (37) driven by a driving motor is movably arranged at the upper and lower ends of the storage tank feeding platform (36). Storage tank limit rods (38) are provided on both sides of the storage tank feeding platform (36). The tank inlet and outlet components (14) are respectively arranged at the storage tanks. At both ends of the tank feeding platform (36), the tank inlet and outlet components (14) have tank inlet and outlet bases (39), the tank inlet and outlet components (14) are located at the upper ends of the tank inlet and outlet bases (39) and are fixedly provided with a motor-driven storage tank transfer tray (40) and a receiving tray (41), the storage tank transfer tray (40) is located at the corresponding end of the storage tank feeding platform (36), and the filling component (13) is located at the upper end of the storage tank feeding platform (36) and is fixedly provided with a liquid injection component (47).

7. The ion membrane caustic soda brine recovery device according to claim 6 is characterized in that: Adjustment block seats (42) are evenly arranged on both sides of the storage tank feeding platform (36) from front to back, the limit rod adjustment block (43) is movably arranged on the adjustment block seat (42) by means of bolts, and the storage tank limit rod (38) is embedded in the front end surface of the limit rod adjustment block (43).

8. The ion membrane caustic soda brine recovery device according to claim 6 is characterized in that: A plurality of storage tank body limiting openings (44) are uniformly formed along the circumferential direction at the outer edge of the storage tank transfer plate (40); a front end of the material receiving plate (41) has a tank passing opening (45); a rear end of the material receiving plate (41) has tank inlet and outlet openings (46); the tank passing opening (45) is located on the side of the storage tank transfer plate (40); and the tank passing opening (45) matches the storage tank body limiting opening (44) in size.

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