CN216584327U

CN216584327U - Electric desalting membrane stack with aviation connector

Info

Publication number: CN216584327U
Application number: CN202220039158.XU
Authority: CN
Inventors: 袁丽
Original assignee: Fuyuan Tianjin Environmental Technology Co ltd
Current assignee: Fuyuan Tianjin Environmental Technology Co ltd
Priority date: 2021-08-27
Filing date: 2022-01-06
Publication date: 2022-05-24
Anticipated expiration: 2032-01-06

Abstract

The application relates to an electric desalting membrane stack with an aviation connector, which belongs to an electric desalting membrane stack and comprises a salt membrane stack body, wherein a concentrated water inlet and a concentrated water outlet are formed in the same side of the salt membrane stack body; the edge of one side of the water distributor, which is far away from the water guide block, is fixedly provided with a water baffle, the position of the water baffle, which corresponds to the concentrated water inlet, is provided with a water flowing gap communicated with the concentrated water inlet, the water distributor is positioned between the water baffle and the water guide block, a plurality of water distribution blocks are fixedly arranged between two adjacent water distribution blocks, a second overflowing gap for water to pass through is formed between the two adjacent water distribution blocks, and the number of the second overflowing gaps on the water distributor is gradually increased from one end close to the water flowing gap to one end far away from the water flowing gap. The ion exchange membrane has the effects of preventing the ion exchange membrane from locally collapsing and preventing the resin in the cavity from being in an uneven state.

Description

Electric desalting membrane stack with aviation connector

Technical Field

The application relates to the field of electric desalting membrane stacks, in particular to an electric desalting membrane stack with an aviation connector.

Background

The electric desalting membrane stack is a device capable of continuously producing ultrapure water, and acid-base regeneration is carried out without stopping the machine. In general, an electrodeionization membrane stack mainly comprises the following structures: anion/cation exchange membranes, ion exchange resins and an electrode device, wherein the ion exchange resins are filled in the concentrated water chamber and the fresh water chamber, the anion/cation exchange membranes are arranged at intervals between the anion/cation exchange membranes, and under the ionization action of the electrode device, the migration of ions is formed, and the ultrapure water is continuously produced.

In the electric desalting membrane stack, a cation-anion exchange membrane is a core component of the electric desalting membrane stack, and a concentrated water chamber is formed between the cation-anion exchange membrane and the anion-cation exchange membrane.

The related art can refer to chinese utility model patent with an authorization publication number CN203971770U, which discloses a concentrated water separator assembly for electrodialysis, wherein: the concentrated water partition plate assembly comprises a flat plate body with an inner frame, wherein a plurality of bolt holes and positioning holes are formed in the flat plate body, a raw water inlet circulation hole and a concentrated water inlet circulation hole are formed in one end of the flat plate body, and a concentrated water outlet circulation hole and a pure water outlet circulation hole are formed in the other end of the flat plate body; the two ends of the flat plate body, which are close to the edge of the inner frame, are respectively provided with a water guide block cavity communicated with the inner frame, the upper surfaces of the water guide block cavities are respectively provided with corresponding water guide blocks, and at least one plug-in column is arranged in each water guide block cavity and correspondingly buckled with a plug-in hole arranged on each water guide block; the inner surface of the water guide block is provided with a plurality of protruding parts which are arranged at intervals along the length direction, a water guide groove is formed between every two protruding parts, and the inner side edge of the water guide block is provided with a reinforcing flange along the thickness direction.

In two rows of lugs of water guide block among the correlation technique, the guiding gutter between the lug that is close to the die cavity is main water distribution district, that is to say, the effect of preliminary drainage is only played to the one row of arrangement scarp lug that is close to the running water breach on the flat body, that is to say, the edge of guiding gutter evenly distributed in the die cavity that really plays the water distribution effect, the cocurrent cross sectional area of raw water on the guiding block equals, the guiding gutter department water pressure that is close to the running water breach can be greater than the water pressure of keeping away from running water breach department, therefore, the guiding gutter velocity of water of this position can be higher than other positions far away from, such velocity of flow leads to ion exchange membrane local collapse to appear very easily, the resin of filling in the die cavity more can be by the rivers impact of different velocity of flow and be inhomogeneous state.

Disclosure of Invention

In order to prevent that ion exchange membrane from appearing the local state of collapsing, preventing that the inhomogeneous state from appearing in the resin in the die cavity, this application provides an electric desalting membrane stack with aviation joint.

The application provides an electric desalting membrane stack with aviation connector adopts following technical scheme:

an electric desalting membrane stack with an aviation connector comprises a salt membrane stack body, wherein a concentrated water inlet is formed in the top of the same side of the salt membrane stack body, a concentrated water outlet is formed in the bottom of the same side of the salt membrane stack body, a concentrated water chamber mechanism is arranged in the salt membrane stack body and comprises a positioning plate, a through groove is formed in the middle of the positioning plate, two step grooves are formed in the positioning plate and located outside the through groove, the step grooves are symmetrically arranged on two sides of the positioning plate, an anion exchange membrane is detachably connected in the step groove on one side of the positioning plate, a cation exchange membrane is clamped in the step groove on the other side of the positioning plate, a cavity is formed between the anion exchange membrane and the cation exchange membrane, and resin is filled in the cavity; water deflectors are arranged at the positions, close to the concentrated water inlet and the concentrated water outlet, of the through grooves of the positioning plate; the edge of the water distributor facing the through groove is fixedly provided with water guide blocks, a first overflowing gap for water flow to pass through is formed between every two adjacent water guide blocks, the edge of one side of the water distributor far away from the water guide blocks is fixedly provided with a water baffle, a flowing water gap communicated with a concentrated water inlet is formed in the position, corresponding to the concentrated water inlet, of the water baffle, the water distributor is positioned between the water baffle and the water guide blocks, a plurality of water distribution blocks are fixedly arranged between every two adjacent water distribution blocks, a second overflowing gap for water flow to pass through is formed between every two adjacent water distribution blocks, a water distribution cavity is formed between every two water distribution blocks, a water guide cavity is formed between every two water distribution blocks, and the number of the second overflowing gaps on the water distributor is gradually increased from one end close to the flowing water gap to one end far away from the flowing water gap.

By adopting the technical scheme, water in the concentrated water inlet flows into the water distributor through the flowing water gap and enters the water distribution cavity, then flows into the water guide cavity through the second overflowing gap, and finally flows into the cavity through the first overflowing gap, the number of the second overflowing gaps on the water distributor is gradually increased from one end close to the flowing water gap to one end far away from the flowing water gap, so that the water yield of the water distribution cavity at a position far away from the concentrated water inlet is increased, the water uniformly enters the cavity to perform ion exchange with the filled resin, the uniformity of the flowing speed of the water entering the cavity is controlled, the filling stability of the resin is improved, the resin in the cavity is prevented from generating an uneven state, the stability of an anion exchange membrane and a cation exchange membrane can be improved, and the anion exchange membrane and the cation exchange membrane are prevented from collapsing.

Optionally, the number of the first overflow gaps on the water deflector gradually increases from one end close to the water flowing notch to one end far away from the water flowing notch.

Through adopting above-mentioned technical scheme, the figure of the first clearance that overflows on the water deflector is increased to the one end figure of keeping away from the flowing water breach by the one end that is close to the flowing water breach gradually, makes the even inflow of water in the die cavity in the dense water export, makes the water pressure that water got into dense water exit even, prevents that the water in dense water exit from evenly flowing out.

Optionally, the positioning plate is provided with a slot in the through slot, and the water deflector screw is fixedly arranged in the slot of the positioning plate.

Through adopting above-mentioned technical scheme, the water deflector fix with screw is convenient for the dismantlement and the installation of water deflector.

Optionally, the middle part of the positioning plate located in the through groove is fixedly provided with a separation stop block, the separation stop block divides the cavity into an upper cavity and a lower cavity, and the middle part of the separation stop block is provided with a water outlet hole.

By adopting the technical scheme, the blocking piece is convenient for water entering the cavity to directly flow into the bottom of the cavity under the action of gravity, the water firstly flows into the upper cavity and then flows into the lower cavity through the lower water hole, the retention time of the water in the upper cavity is prolonged, the water and the resin in the upper cavity are subjected to ion exchange, and the ion exchange between the water and the resin in the cavity is more thorough.

Optionally, the locating plate is located and has seted up the step groove to lead to groove both sides, anion exchange membrane joint in the step inslot of locating plate one side, cation exchange membrane joint in the step inslot of locating plate opposite side, the step inslot joint that the locating plate was provided with anion exchange membrane has anion baffle, bolt fastening between anion baffle and the locating plate, the step inslot joint that the locating plate was provided with cation baffle has cation baffle, bolt fastening between cation baffle and the locating plate, be fixed in the locating plate through cation baffle promptly with cation exchange membrane on the locating plate.

Through adopting above-mentioned technical scheme, the bolt fastening between anion baffle and the locating plate, be fixed in the locating plate with the anion membrane through the anion baffle promptly on, the bolt fastening between cation baffle and the locating plate is fixed in the locating plate with cation exchange membrane through the cation baffle promptly on, is convenient for dismantle and install anion exchange membrane and cation exchange membrane.

Optionally, the positioning plate is located in the step groove and is fixedly provided with a first sealing ring.

Through adopting above-mentioned technical scheme, first sealing washer is used for sealing between anion exchange membrane and the locating plate, and the first sealing washer of opposite side is sealed between cation exchange membrane and the locating plate to resin in the die cavity is sealed, prevents that resin from flowing out between anion exchange membrane and the locating plate, or flows out between cation exchange membrane and the locating plate.

Optionally, the two sides of the positioning plate are located outside the step groove and are fixedly provided with second sealing rings, and the second sealing rings completely enclose the concentrated water inlet and the concentrated water outlet on the positioning plate.

Through adopting above-mentioned technical scheme, the second sealing washer is lived with the whole encircles of dense water import and dense water export on the locating plate, carries out the body seal with all positions that have probably water to pass through on the second sealing washer with the locating plate promptly, prevents that water from leaking to the salt membrane heap originally internally.

Optionally, an electrified connector is fixedly arranged on the housing of the junction box, and a cover is connected to the electrified connector in a threaded manner.

Through adopting above-mentioned technical scheme, the lid can prevent when not working a telephone switchboard, and water and dust etc. enter into the power connector in, ensure aviation connector's cleanliness, can also prevent to soak.

Optionally, the power connector is an air connector.

By adopting the technical scheme, the aviation connector is sent to a customer use site along with equipment, and secondary wiring is not needed when the aviation connector is directly plugged, so that errors and losses are absolutely avoided.

In summary, the present application includes at least one of the following beneficial technical effects:

the number of the second overflowing gaps on the water guider is gradually increased from one end close to the flowing water gap to one end far away from the flowing water gap, the number of the first overflowing gaps on the water guider is gradually increased from one end close to the flowing water gap to one end far away from the flowing water gap, so that the water in the cavity uniformly flows into the concentrated water outlet, the water pressure of the water entering the concentrated water outlet is uniform, and the water at the concentrated water outlet uniformly flows out, the water distribution cavity is communicated with the water inlet, the water inlet is communicated with the water distribution cavity, the water distribution cavity is communicated with the water distribution cavity, and the water distribution cavity is communicated with the water distribution cavity.

Drawings

Fig. 1 is a schematic structural diagram of the embodiment.

Fig. 2 is an exploded view of the embodiment.

Fig. 3 is a sectional view of the embodiment.

Fig. 4 is a schematic structural view of the concentrate chamber mechanism.

Fig. 5 is an exploded view of the concentrate chamber mechanism.

Fig. 6 is a sectional view of the concentrate chamber mechanism.

Fig. 7 is a structural schematic view of the water deflector.

Description of reference numerals: 1. a salt film stack body; 11. a pure water inlet; 12. a concentrated water inlet; 13. a pure water outlet; 14. a concentrated water outlet; 2. a junction box; 21. an electrical connection; 211. a cover; 3. a concentrated water chamber mechanism; 31. positioning a plate; 311. a through groove; 312. a step groove; 313. a first seal ring; 314. a second seal ring; 315. a card slot; 32. an anion exchange membrane; 321. an anion separator; 33. a cation exchange membrane; 331. a cationic separator; 34. a cavity; 341. a separating block; 342. an upper chamber; 343. a lower chamber; 344. a drain hole; 35. a water deflector; 351. a water guide block; 352. a first over-current gap; 353. a water guide cavity; 354. a water distribution block; 355. a second over-current gap; 356. a water distribution cavity; 357. a water baffle; 358. a water gap.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses an electric desalting membrane stack with an aviation connector. Referring to fig. 1 and 2, an electricity removes salt membrane stack with aviation connector includes salt membrane stack body 1, one side of salt membrane stack body 1 is provided with terminal box 2, pure water inlet 11, dense water import 12, pure water outlet 13 and dense water outlet 14 have been seted up to the opposite side, pure water inlet 11 and dense water inlet 12 are located salt membrane stack body 1 and are close to the position at top, pure water outlet 13 and dense water outlet 14 are located salt membrane stack body 1 and are close to the position of bottom, pure water inlet 11 and pure water outlet 13 set up relatively, dense water inlet 12 and dense water outlet 14 set up relatively.

Set up terminal box 2 and pure water inlet 11 and dense water inlet 12 respectively in the both sides of salt membrane heap body 1 symmetry, can prevent that the water droplet that pure water inlet 11 and dense water inlet 12 department left over from dropping on terminal box 2, prevent the electric leakage action, do not have the potential safety hazard.

An electrified connector 21 is fixedly arranged on the shell of the junction box 2, a cover 211 is in threaded connection with the electrified connector 21, and the cover 211 can prevent water, dust and the like from entering the electrified connector 21 when the wiring is not performed; the power connector 21 is an aviation connector, the aviation connector is sent to a customer use site along with equipment, secondary wiring is not needed when the aviation connector is directly plugged, and errors and losses are absolutely avoided.

Referring to fig. 3 and 4, a plurality of concentrated water chamber mechanisms 3 are arranged in the salt film stack body 1, and only one concentrated water chamber mechanism 3 is shown in the figure. The concentrated water chamber mechanism 3 comprises a positioning plate 31, a through groove 311 is formed in the middle of the positioning plate 31, two step grooves 312 are formed outside the through groove 311 in the positioning plate 31, the step grooves 312 are symmetrically arranged on two sides of the positioning plate 31, an anion exchange membrane 32 is clamped in the step groove 312 on one side of the positioning plate 31, an anion partition plate 321 is clamped in the step groove 312 of the positioning plate 31, and the anion partition plate 321 and the positioning plate 31 are fixed through bolts, namely, an anion membrane is fixed on the positioning plate 31 through the anion partition plate 321; a cation exchange membrane 33 is clamped in the stepped groove 312 on the other side of the positioning plate 31, a cation partition plate 331 is clamped in the stepped groove 312 of the positioning plate 31, the cation partition plate 331 and the positioning plate 31 are fixed by bolts, namely, the cation exchange membrane 33 is fixed on the positioning plate 31 through the cation partition plate 331, a cavity 34 is formed between the anion exchange membrane 32 and the cation exchange membrane 33, and the cavity 34 is filled with resin. The first sealing rings 313 are fixedly arranged in the step grooves 312 of the positioning plates 31, the first sealing rings 313 are used for sealing between the anion exchange membrane 32 and the positioning plates 31, and the first sealing rings 313 on the other side are used for sealing between the cation exchange membrane 33 and the positioning plates 31, so that the resin in the cavity 34 is sealed, and the resin is prevented from flowing out from between the anion exchange membrane 32 and the positioning plates 31 or from flowing out from between the cation exchange membrane 33 and the positioning plates 31.

Referring to fig. 5, the two sides of the positioning plate 31 are located outside the stepped groove 312, and the second sealing rings 314 are fixedly arranged on the two sides of the positioning plate 31, and enclose all the pure water inlet 11, the concentrated water inlet 12, the pure water outlet 13 and the concentrated water outlet 14 on the positioning plate 31, that is, the second sealing rings 314 are used to integrally seal all the positions on the positioning plate 31 where water may pass, so as to prevent the water from leaking into the salt film stack body 1.

Referring to fig. 6 and 7, a clamping groove 315 is formed in the through groove 311 of the positioning plate 31, the clamping groove 315 is located at two ends of the through groove 311 close to the concentrated water inlet 12 and the concentrated water outlet 14, a water deflector 35 is fixed in the clamping groove 315 by screws, the water deflector 35 is arranged in an arc shape, a water deflector 351 is fixedly arranged on the edge of the water deflector 35 facing the through groove 311, and a first overflowing gap 352 through which water flows is formed between adjacent water deflector 351; a water baffle 356 is fixedly arranged on the edge of one side of the water guider 35 away from the water guide block 351, two water flowing notches 358 are formed in the positions, corresponding to the concentrated water inlet 12, of the water baffle 356, and the water flowing notches 358 guide the water in the concentrated water inlet 12 into the water guider 35; the water distributor 35 is fixedly provided with a plurality of water distribution blocks 354 between the water baffle 356 and the water guide block 351, a second overflow gap 355 for water to pass through is formed between two adjacent water distribution blocks 354, a water distribution cavity 356 is formed between the water distribution blocks 354 and the water baffle 356, a water guide cavity 353 is formed between the water distribution blocks 354 and the water guide block 351, and water in the concentrated water inlet 12 flows into the water distributor cavity 356 through the water flow gap 358, then flows into the water guide cavity 353 through the second overflow gap 355, and finally flows into the cavity 34 through the first overflow gap 352.

In order to make the water at the concentrated water inlet 12 enter the cavity 34 uniformly, the number of the second overflow gaps 355 on the water deflector 35 is gradually increased from one end close to the flowing water gap 358 to one end far away from the flowing water gap 358, and the number of the first overflow gaps 352 on the water deflector 35 is gradually increased from one end close to the flowing water gap 358 to one end far away from the flowing water gap 358, so as to increase the water outlet amount of the water distribution cavity 356 far away from the concentrated water inlet 12, so that the water enters the cavity 34 uniformly to perform ion exchange with the filled resin, control the uniformity of the flow rate of the water flowing into the cavity 34, improve the filling stability of the resin, improve the stability of the anion exchange membrane 32 and the cation exchange membrane 33, and prevent the anion exchange membrane 32 and the cation exchange membrane 33 from collapsing.

Similarly, the structure of the water deflector 35 located at the bottom of the cavity 34 and close to the concentrated water outlet 14 is the same, the number of the second overflow gaps 355 on the water deflector 35 gradually increases from one end close to the water flowing gap 358 to one end far away from the water flowing gap 358, and the number of the first overflow gaps 352 on the water deflector 35 gradually increases from one end close to the water flowing gap 358 to one end far away from the water flowing gap 358, so that the water in the cavity 34 uniformly flows into the concentrated water outlet 14, the water pressure of the water entering the concentrated water outlet 14 is uniform, and the water pressure at the concentrated water outlet 14 is prevented from flowing more uniformly.

The middle of the through groove 311 of the positioning plate 31 is fixedly provided with a separation block 341, the separation block 341 divides the cavity 34 into an upper cavity 342 and a lower cavity 343, the middle of the separation block 341 is provided with a lower water hole 344, the separation block 341 facilitates water entering the cavity 34 to directly flow into the bottom of the cavity 34 under the action of gravity, the water firstly flows into the upper cavity 342 and then flows into the lower cavity 343 through the lower water hole 344, the retention time of the water in the upper cavity 342 is increased, so that the water in the upper cavity 342 and resin are subjected to ion exchange, and the ion exchange between the water and the resin in the cavity 34 is more thorough.

The implementation principle of the electric desalting membrane stack with the aviation connector is as follows: the crystal concentrated water inlet 12 enters the water deflector 35, the number of the second overflowing gaps 355 of the crystal water deflector 35 enters the water guide chamber 353, the number of the second overflowing gaps 355 on the water deflector 35 is gradually increased from one end close to the flowing water notch 358 to one end far away from the flowing water notch 358, so that the water yield of the water distribution chamber 356 far away from the concentrated water inlet 12 is increased, water uniformly enters the cavity 34 to perform ion exchange with filled resin, the uniformity of the flow rate of water entering the cavity 34 is controlled, the filling stability of the resin is improved, finally the first overflowing gaps 352 uniformly enter the upper chamber 342 and then flow into the lower chamber 343 through the lower water holes 344, the water in the lower chamber 343 finally flows into the concentrated water outlet 14 through the water deflector 35, the number of the first overflowing gaps 352 on the water deflector 35 is gradually increased from one end close to the flowing water notch 358 to one end far away from the flowing water notch 358, the water in the lower chamber 343 can uniformly flow into the water deflector 35, so that the water pressure at the concentrated water outlet 14 is uniform, and the water pressure at the concentrated water outlet 14 is prevented from flowing out more uniformly.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an electric desalination membrane piles with aviation connector, includes that the salt membrane piles body (1), the top of salt membrane pile body (1) homonymy is provided with dense water import (12), and the bottom is provided with dense water export (14), is provided with dense water room mechanism (3), its characterized in that in the salt membrane pile body (1):

the concentrated water chamber mechanism (3) comprises a positioning plate (31), a through groove (311) is formed in the middle of the positioning plate (31), two step grooves (312) are formed outside the through groove (311) of the positioning plate (31), the step grooves (312) are symmetrically arranged on two sides of the positioning plate (31), an anion exchange membrane (32) is detachably connected in the step groove (312) on one side of the positioning plate (31), a cation exchange membrane (33) is clamped in the step groove (312) on the other side of the positioning plate (31), a cavity (34) is formed between the anion exchange membrane (32) and the cation exchange membrane (33), and resin is filled in the cavity (34);

water deflectors (35) are arranged at positions, close to the concentrated water inlet (12) and the concentrated water outlet (14), of the through groove (311) of the positioning plate (31);

the edge of the water deflector (35) facing the through groove (311) is fixedly provided with water guide blocks (351), a first overflowing gap (352) for water flow to pass through is formed between adjacent water guide blocks (351), one side edge of the water deflector (35) far away from the water guide blocks (351) is fixedly provided with a water baffle (357), the position of the water baffle (357) corresponding to the concentrated water inlet (12) is provided with a flowing water gap (358) communicated with the concentrated water inlet (12), the water deflector (35) is positioned between the water baffle (357) and the water guide blocks (351), a plurality of water distribution blocks (354) are fixedly arranged between two adjacent water distribution blocks (354), a second overflowing gap (355) for water flow to pass through is formed between the two adjacent water distribution blocks (354), a water distribution cavity (356) is formed between the water distribution block (354) and the water baffle (357), a water guide cavity (353) is formed between the water distribution blocks (351), the number of the second overflowing gaps (355) on the water deflector (35) is increased from one end close to one end of the flowing water gap (358) far away from one end of the flowing water gap (358) And is gradually increased.

2. The electrodeionization membrane stack with the aerospace joint of claim 1, wherein: the number of the first overflowing gaps (352) on the water deflector (35) is gradually increased from one end close to the water flowing notch (358) to one end far away from the water flowing notch (358).

3. The electrodeionization membrane stack with the aerospace joint of claim 1, wherein: the positioning plate (31) is positioned in the through groove (311) and provided with a clamping groove (315), and the water deflector (35) is fixedly arranged in the clamping groove (315) of the positioning plate (31) through a screw.

4. The electric desalination membrane stack with aviation connector of claim 1, wherein: the middle part of the positioning plate (31) in the through groove (311) is fixedly provided with a separation block (341), the separation block (341) divides the cavity (34) into an upper cavity (342) and a lower cavity (343), and the middle part of the separation block (341) is provided with a lower water hole (344).

5. The electrodeionization membrane stack with the aerospace joint of claim 1, wherein: the positioning plate (31) is positioned on two sides of the through groove (311) and is provided with step grooves (312), the anion exchange membrane (32) is clamped in the step groove (312) on one side of the positioning plate (31), the cation exchange membrane (33) is clamped in the step groove (312) on the other side of the positioning plate (31), the positioning plate (31) is provided with the anion exchange membrane (32), an anion partition plate (321) is clamped in the step groove (312), the anion partition plate (321) and the positioning plate (31) are fixed through bolts, the positioning plate (31) is provided with the cation partition plate (331), the cation partition plate (331) is clamped in the step groove (312) of the cation partition plate (331), the cation partition plate (331) and the positioning plate (31) are fixed through the cation partition plate (331), and the cation exchange membrane (33) is fixed on the positioning plate (31).

6. The electrodeionization membrane stack with the aerospace joint of claim 5, wherein: the positioning plate (31) is positioned in the step groove (312) and is fixedly provided with a first sealing ring (313).

7. The electric desalination membrane stack with aviation connector of claim 5, wherein: and the two sides of the positioning plate (31) are positioned outside the stepped groove (312) and are fixedly provided with second sealing rings (314), and the second sealing rings (314) completely enclose the concentrated water inlet (12) and the concentrated water outlet (14) on the positioning plate (31).

8. The electrodeionization membrane stack with the aerospace joint of claim 1, wherein: one side of the salt film stack body (1) is provided with a junction box (2), an electrified joint (21) is fixedly arranged on a shell of the junction box (2), and a cover (211) is connected to the electrified joint (21) in a threaded mode.

9. The electric desalination membrane stack with aviation connector of claim 8, wherein: the power-on connector (21) is an aviation connector.