CN111825172A

CN111825172A - Sealed effectual desulfurization waste water electrodialysis device

Info

Publication number: CN111825172A
Application number: CN202010971247.3A
Authority: CN
Inventors: 代春龙; 魏丽萍
Original assignee: Shandong Longantai Environmental Protection Sci Tech Co ltd
Current assignee: Shandong Longantai Environmental Protection Sci Tech Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-10-27
Anticipated expiration: 2040-09-16
Also published as: CN111825172B

Abstract

The utility model provides a sealed effectual desulfurization waste water electrodialysis device, includes the casing, the casing fit in be equipped with two polar plates, several baffle, several ion exchange membrane, per two ion exchange membranes separate into an independent space with casing inside respectively, the polar plate is located the inside front and back both sides of casing respectively, the baffle is placed respectively between two adjacent ion exchange membranes, the left side fixed mounting of casing has the inlet tube with the inside intercommunication of casing, the left and right sides of casing is equipped with the first piston cylinder of symmetric distribution respectively, the first piston cylinder on left side and right side communicates with the inside of the independent space that corresponds respectively. The invention can realize the timing replacement of the electrode through a mechanical structure, can replace the water outlet after the electrode is replaced, and can avoid the pollution of fresh water after the electrodialysis is finished because of the mixing of certain concentrated water in the fresh water.

Description

Sealed effectual desulfurization waste water electrodialysis device

Technical Field

The invention belongs to the field of electrodialysis devices, and particularly relates to a desulfurization wastewater electrodialysis device with a good sealing effect.

Background

After the wastewater is desulfurized, the electrodialysis device is often needed to be used for treating the water, in the existing electrodialysis device, the electrodialysis device is often controlled through a complex program to carry out frequent electrode reversal, contact ends of electrodes are required to be continuously replaced in the process, and water valves are required to be replaced at the same time, however, in the process, complex circuit elements are often required through program control, once faults occur, the maintenance and replacement are very laborious, the price of the circuit elements is high, the cost of the electrodialysis device is increased, the service life of the valves is shortened due to frequent valve replacement, the valves are not beneficial to use, and due to the fact that water inlet and outlet valves are required to be replaced after the electrodes are replaced, the problems that residual concentrated water mixed in fresh water easily causes pollution to the treated fresh water and the treated fresh water is not beneficial to good treatment of sewage exist, therefore, the electrodialysis device for the desulfurization wastewater with good sealing effect is designed.

Disclosure of Invention

The invention provides an electrodialysis device for desulfurization wastewater with good sealing effect, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme:

the electrodialysis device for desulfurization waste water with good sealing effect comprises a shell, wherein two polar plates, a plurality of partition plates and a plurality of ion exchange membranes are arranged in the shell in a matched mode, each two ion exchange membranes divide the interior of the shell into an independent space, the polar plates are respectively positioned on the front side and the rear side of the interior of the shell, the partition plates are respectively placed between every two adjacent ion exchange membranes, a water inlet pipe communicated with the interior of the shell is fixedly installed on the left side of the shell, a plurality of first piston cylinders which are symmetrically distributed are respectively arranged on the left side and the right side of the shell, the first piston cylinders on the left side and the right side are respectively communicated with the interiors of the corresponding independent spaces, first pistons are respectively and movably installed in the first piston cylinders, opposite sides of the first pistons are respectively and fixedly connected with the inner walls of the first piston cylinders through telescopic rods, a lead screw is respectively arranged between, the periphery of the screw rod is sleeved with an annular gear column, the upper side and the lower side of the inner wall of the annular gear column are respectively provided with a plurality of mounting grooves, balls are respectively and movably mounted in the mounting grooves, the inner sides of the inner walls of the mounting grooves are respectively and fixedly connected with one end of a first spring, the other end of the first spring is respectively and fixedly mounted with an arc plate, the inner arc surfaces of the arc plates are respectively in sliding contact fit with the peripheries of the corresponding balls, the balls can respectively roll on a thread rolling way on the corresponding screw rod, each independent space is respectively and fixedly provided with a waterproof motor at the lower side of the right side of the inner wall of the shell, each independent space is respectively and fixedly provided with two supports, the corresponding supports are respectively and fixedly mounted at the left side and the right side of the inner wall of the shell, the periphery of an output shaft of the waterproof motor is respectively and, the second gears are respectively engaged with the corresponding left first gears, two vertically arranged and mutually engaged third gears are respectively arranged below the right first gears, the third gears on the upper sides are respectively engaged with the corresponding right first gears, the third gears are respectively bearing-mounted on the corresponding supports, the diameters of the first gears are the same as the radiuses of the second gears, fourth gears are respectively arranged below the first gears, the fourth gears are respectively bearing-mounted on the corresponding supports, the left fourth gears are respectively engaged with the corresponding second gears, the right fourth gears are respectively engaged with the corresponding lower third gears, the fourth gears can be respectively engaged with the corresponding annular gear columns, stop blocks are respectively arranged on the opposite sides of the fourth gears, the stop blocks are respectively fixedly mounted on the corresponding supports, and the stop blocks can be respectively in sliding contact fit with the left sides and the right sides of the corresponding annular gear columns, the opposite sides of the first piston are respectively provided with a reversing device, the outer sides of the inner walls of two first piston cylinders corresponding to one independent space are respectively fixedly provided with a second piston cylinder, the second piston cylinders are respectively internally provided with a second piston, a first spring rod is respectively arranged between the second piston and the corresponding first piston, the two ends of the first spring rod are respectively fixedly connected with the corresponding first piston and the corresponding second piston, the opposite sides of the second piston are respectively provided with a support plate positioned in the second piston cylinder, the opposite surfaces between the second piston and the corresponding support plate are respectively fixedly provided with a current-conducting plate, the second piston on the left side is respectively fixedly arranged in the second piston cylinder on the left side, the right side of the second piston on the right side is respectively fixedly connected with one end of a second spring, one end of the second spring is respectively fixedly connected with the inner wall of the corresponding second piston cylinder, the lower side of the periphery of the first piston cylinders, two liquid discharge ports are formed in the bottom surface of the shell and are respectively communicated with the space between the corresponding polar plate and the ion exchange membrane.

The desulfurization wastewater electrodialysis device with good sealing effect comprises a second spring rod fixedly mounted on the opposite side of the corresponding first piston, and baffles are respectively hinged to the outer sides of the bottom surfaces of the stop blocks through torsion springs.

According to the desulfurization wastewater electrodialysis device with the good sealing effect, the plurality of stirring blades are fixedly installed in the middle of the periphery of the annular gear column.

According to the desulfurization wastewater electrodialysis device with the good sealing effect, the inner walls of the second piston cylinders are respectively provided with the vent holes which penetrate through the first piston cylinders and are communicated with the outside.

According to the electrodialysis device for the desulfurization wastewater with good sealing effect, the support plate is provided with the through hole.

According to the desulfurization wastewater electrodialysis device with good sealing effect, the lower sides of the inner sides of the stop blocks are respectively provided with the spherical grooves, and the spherical grooves are respectively and movably provided with the spheres.

The invention has the advantages that: the invention can realize the timing replacement of the electrode through a mechanical structure, can replace the water outlet after the electrode is replaced, and can avoid the pollution of fresh water after the electrodialysis is finished because of the mixing of certain concentrated water in the fresh water. When the invention is used, the two current-conducting plates at the left side and the two pole plates are connected through a circuit and then connected into a direct current power supply, the two current-conducting plates at the right side are also connected with the two pole plates through a circuit and then connected into another direct current power supply, each pole plate is respectively connected with different electrodes of the two direct current power supplies, the circuit connection mode is the conventional prior art, the description is omitted, the water outlet at the left side is respectively communicated with a fresh water drain pipe, the water outlet at the right side and two liquid discharge ports are respectively communicated with a concentrated water drain pipe, a motor is started, concentrated water areas and fresh water areas in two adjacent independent spaces are arranged in a staggered mode, the motion directions of screw rods in the two adjacent independent spaces are opposite, taking the state shown in the figure as an example, at the moment, the concentrated water is in the independent space, the motor rotates to drive the first gear to rotate, the screw rod is driven to transversely move rightwards to enable the two current conducting plates on the right side to be in contact fit, the two current conducting plates on the left side are separated, then the positive pole and the negative pole on the pole plates are reversed, pure water is generated in the independent space, the first piston on the left side is still in sliding contact fit with the inner wall of the first piston cylinder on the left side, the first piston on the right side is not in contact fit with the first piston on the right side, fresh water mixed with thick water is discharged through the first piston cylinder on the right side and the water outlet on the right side at the moment, the first piston on the right side is in contact fit with the first piston on the right side and the first piston on the left side is separated from the inner wall of the first piston cylinder on the left side after 1-2 min, the qualified fresh water is discharged through the first piston cylinder on the left side, the second spring is compressed to the shortest, then the first spring rod on the right side contracts until the reversing device gives a force which is right to the annular gear column, the ball contracts towards the mounting groove under the action of a thrust force, the annular gear column moves rightwards and is meshed with the fourth gear on the right side, the fourth gears on the left side and the right side rotate in opposite directions, the annular gear column is driven to rotate in opposite directions, the screw rod is driven to move leftwards, the first piston on the right side moves leftwards, the first spring rod on the right side gradually extends to the longest, then the second piston on the right side moves leftwards, the supporting plate is driven to move leftwards under the elastic force of the second spring, the two current-conducting plates on the right side are still in contact fit to enable a circuit to be communicated until the first piston on the left side is in contact fit with the first piston cylinder on, the two current-conducting plates on the right side are separated after the second spring on the right side extends to the longest, the positive pole and the negative pole on the pole plates are reversed again, the concentrated water generated in the independent space is discharged through the water outlet on the right side again until the reversing device on the left side pushes the annular gear column to move leftwards to be meshed with the fourth gear on the left side, the circulation process is repeated, the motion states of the first pistons in the other concentrated water areas and the fresh water areas are the same as the motion states and the processes of the first pistons when the concentrated water and the fresh water are generated respectively, so that repeated description is omitted, the time interval of reversing the positive pole and the negative pole on each pole plate is 15-20 min, the electrodes on the pole plates can be replaced by rotating the motor, the water outlet can be replaced after the electrodes are replaced, the fresh water outlet can be opened in a delayed mode and closed in advance, and the phenomenon that the quality of the fresh water is influenced by, the production quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is a view in the direction A of FIG. 1; FIG. 3 is an enlarged view of section I of FIG. 1; FIG. 4 is an enlarged view of a portion II of FIG. 1; FIG. 5 is an enlarged view of a portion III of FIG. 1; fig. 6 is a circuit connection diagram of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An electrodialysis device for desulfurization waste water with good sealing effect comprises a shell 1, wherein two polar plates, a plurality of partition plates 2 and a plurality of ion exchange membranes are arranged in the shell 1 in a matched mode, the ion exchange membranes are divided into cation exchange membranes and anion exchange membranes which are arranged in a staggered mode, every two ion exchange membranes divide the interior of the shell 1 into independent spaces, the polar plates are respectively arranged on the front side and the rear side of the interior of the shell 1, the partition plates 2 are respectively arranged between every two adjacent ion exchange membranes, water distribution holes are formed in the partition plates 2, a water inlet pipe 3 communicated with the interior of the shell 1 is fixedly arranged on the left side of the shell 1, the water inlet pipe 3 is respectively communicated with each independent space, the specific connection relation and the placement are well known technologies, detailed description is omitted, and a plurality of first piston cylinders 4 are symmetrically distributed on the left side and the right, the number of the first piston cylinders 4 on each side is the same as that of the independent spaces, the first piston cylinders 4 on the left side and the right side are respectively communicated with the interiors of the corresponding independent spaces, first pistons 5 are respectively and movably installed in the first piston cylinders 4, the first pistons 5 can only move left and right in the corresponding first piston cylinders 4, the opposite sides of the first pistons 5 are respectively and fixedly connected with the inner walls of the first piston cylinders 4 through telescopic rods 32, a screw rod 6 is respectively arranged between every two opposite first pistons 5, the left end and the right end of the screw rod 6 are respectively and fixedly connected with the corresponding first pistons 5, an annular gear column 7 is sleeved on the periphery of the screw rod 6, a plurality of installation grooves 8 are respectively formed in the upper side and the lower side of the inner wall of the annular gear column 7, balls 9 are respectively and movably installed in the installation grooves 8, the balls 9 can only rotate and move up and down in the corresponding installation grooves 8, and the inner sides, the other end of the first spring 10 is respectively fixedly provided with an arc plate 11, the inner arc surface of the arc plate 11 is respectively matched with the periphery of the corresponding ball 9 in a sliding contact manner, the ball 9 can respectively roll on the thread roller path on the corresponding screw 6, each independent space is respectively provided with a waterproof motor 12 fixedly arranged on the right side of the inner wall of the shell 1, each independent space is respectively provided with two brackets 13, the corresponding brackets 13 are respectively fixedly arranged on the left side and the right side of the inner wall of the shell 1, the periphery of the output shaft of the waterproof motor 12 is respectively fixedly provided with two coaxial first gears 14, the lower part of the first gear 14 on the left side is respectively provided with a second gear 15, the second gears 15 are respectively arranged on the corresponding brackets 13 in a bearing manner, the second gears 15 are respectively meshed with the corresponding first gear 14 on the left side, the lower part of the first gear 14 on the right side is respectively provided with two vertically arranged, the third gears 16 on the upper side are respectively meshed with the corresponding first gears 14 on the right side, the third gears 16 are respectively bearing-mounted on the corresponding supports 13, the diameter of the first gears 16 is the same as the radius of the second gears 15, the fourth gears 17 are respectively arranged below the first gears 14, the fourth gears 17 are respectively bearing-mounted on the corresponding supports 13, the fourth gears 17 on the left side are respectively meshed with the corresponding second gears 15, the fourth gears 17 on the right side are respectively meshed with the corresponding third gears 16 on the lower side, the fourth gears 17 can be respectively meshed with the corresponding annular gear columns 7, at the same time point, only one fourth gear 17 is meshed with the corresponding annular gear column 7, the opposite sides of the fourth gears 17 are respectively provided with stop blocks 18, the stop blocks 18 are respectively fixedly mounted on the corresponding supports 13, the stop blocks 18 can be respectively in sliding contact fit with the left side and the right side of the corresponding annular gear column 7, the opposite sides of the first piston 5 are respectively provided with a reversing device 19, the reversing devices 19 can be in contact fit with the left side and the right side of the corresponding ring gear column 7, the outer sides of the inner walls of two first piston cylinders 4 corresponding to one independent space are respectively fixedly provided with a second piston cylinder 20, the second piston cylinders 20 are respectively provided with a second piston 21, a first spring rod 22 is respectively arranged between the second piston 21 and the corresponding first piston 5, the two ends of the first spring rod 22 are respectively fixedly connected with the corresponding first piston 5 and the corresponding second piston 21, the opposite sides of the second piston 21 are respectively provided with a support plate 23 positioned in the second piston cylinder 20, the opposite surfaces between the second piston 21 and the corresponding support plate 23 are respectively fixedly provided with a conductive plate 24, the second piston 21 on the left side is respectively fixedly arranged in the second piston cylinder 20 on the left side, the right side of the second piston 21 on the right side is respectively fixedly connected with one end of a second spring 25, one end of each second spring 25 is fixedly connected with the inner wall of the corresponding second piston cylinder 20, the elastic force of each first spring rod 22 is larger than the sum of the friction force between the corresponding second piston cylinder 20 and the corresponding second piston 21 and the elastic force of the corresponding second spring 25, the lower side of the periphery of the first piston cylinder 4 is provided with a water outlet 26, the bottom surface of the shell 1 is provided with two liquid outlets 33, and the liquid outlets 33 are respectively communicated with the spaces between the corresponding polar plates and the corresponding ion exchange membranes. The invention can realize the timing replacement of the electrode through a mechanical structure, can replace the water outlet after the electrode is replaced, and can avoid the pollution of fresh water after the electrodialysis is finished because of the mixing of certain concentrated water in the fresh water. When the invention is used, the two conducting plates 24 on the left side and the two pole plates are connected through the circuit and then connected into a direct current power supply, the two conducting plates 24 on the right side and the two pole plates are connected through the circuit and then connected into another direct current power supply, each pole plate is respectively connected with different electrodes of the two direct current power supplies, the circuit connection mode is the conventional prior art, and therefore the description is not repeated, the water outlet 26 on the left side is respectively communicated with a fresh water drain pipe, the water outlet 26 on the right side and two liquid outlets 33 are respectively communicated with a concentrated water drain pipe, the motor 12 is started, concentrated water areas and fresh water areas in two adjacent independent spaces are arranged in a staggered mode, the motion directions of the screw rods 6 in the two adjacent independent spaces are opposite, taking the state shown in figure 1 as an example, at the moment, the concentrated water is in the independent space, the motor 12 rotates to drive the first gear 14 to rotate, and the annular gear column, the screw rod 6 is driven to transversely move rightwards, so that the two right conductive plates 24 are in contact fit, the two left conductive plates 24 are separated, the positive pole and the negative pole on the pole plates are reversed, pure water is generated in the independent space, the first piston 5 on the left side is still in sliding contact fit with the inner wall of the first piston cylinder 4 on the left side, the first piston 5 on the right side is not in contact fit with the first piston 4 on the right side, the fresh water mixed with the concentrated water is discharged through the first piston cylinder 4 on the right side and the water outlet 26 on the right side at the moment, the first piston 5 on the right side is in contact fit with the first piston 4 on the right side and the first piston 5 on the left side is separated from the inner wall of the first piston cylinder 4 on the left side after 1-2 min, the concentrated water is not mixed in the fresh water at the moment, qualified, the right second piston 21 pushes the right support plate 23 to move rightwards, the second spring 25 is compressed to the shortest, then the right first spring rod 22 contracts until the reversing device 19 gives a force to the right of the ring gear column 7, the ball 9 contracts towards the inside of the mounting groove 8 under the action of the thrust, the ring gear column 7 moves rightwards and is meshed with the right fourth gear 17, the ring gear column 7 is driven to rotate in the opposite direction due to the opposite rotation direction of the left and right fourth gears 17, the screw rod 6 is driven to move leftwards, the right first piston 5 moves leftwards, the right first spring rod 22 gradually extends to the longest, then the right second piston 21 moves leftwards, the support plate 23 is pushed to move leftwards under the elastic force of the second spring 25, the two right conductive plates 24 are still in contact fit to enable the circuit to be communicated, and the left first piston 5 is in contact fit with the left first piston cylinder 4, the first piston 5 on the left side is separated from the first piston cylinder 4, then the two conducting plates 24 on the left side are in contact fit, the second spring 25 on the right side extends to the longest and then the two conducting plates 24 on the right side are separated, the positive and negative poles on the pole plates are reversed again, the concentrated water generated in the independent space is discharged through the water outlet on the right side again until the reversing device 19 on the left side pushes the ring gear column 7 to move leftwards to be meshed with the fourth gear 17 on the left side, the circulation process is repeated, the motion states of the first piston 5 in the rest concentrated water area and the fresh water area are the same as the process and the motion state of the first piston 5 in the process of respectively generating concentrated water and fresh water, so that repeated description is omitted, the time interval of reversing the positive and negative poles on each pole plate is 15-20 min, through the device, the replacement of the electrodes on the pole plates can be realized through the rotation of, and the fresh water outlet can be opened in a delayed manner and closed in advance, so that the influence on the quality of the fresh water caused by doping the concentrated water into the fresh water after the electrode is replaced is avoided, and the production quality is improved.

Specifically, as shown in the drawings, the reversing device 19 of the present embodiment includes a second spring rod 191 fixedly installed at the opposite side of the corresponding first piston 5, and the stoppers 192 are respectively hinge-installed at the outer sides of the bottom surfaces of the stoppers 18 by torsion springs. When the screw rod 6 moves rightwards, the inner end of the second spring rod 191 on the left side is driven by the first piston 5 to contact with the baffle 192, the torsion force of the torsion spring is larger than the elastic force of the second spring rod 191 at the moment, until the second spring rod 191 is gradually compressed, the elastic force is gradually increased, until the elastic force of the second spring rod 191 at the moment is larger than the torsion force of the torsion spring, the baffle 192 cannot block the second spring rod 191, the second spring rod 191 extends to contact with the left side of the annular gear column 7 and exert thrust, the ball 9 contracts towards the inside of the mounting groove 8, the annular gear column 7 moves rightwards along the screw rod 6, the annular gear column 7 is not meshed with the fourth gear 17 on the left side and is meshed with the fourth gear 17 on the right side, the fourth gear 17 on the right side drives the annular gear column 7 to rotate reversely, the screw rod 6 moves leftwards in a reversing manner, and, therefore, the detailed description is omitted.

Specifically, as shown in the figure, a plurality of stirring blades 27 are fixedly installed in the middle of the periphery of the ring gear column 7 according to the embodiment. Through stirring paddle 27, can make ring gear 7 can stir water when the pivoted, can stir water, avoid the dirt deposit in casing 1 bottom discharge that can not normally when falling extremely.

Further, as shown in the figure, the inner walls of the second piston cylinders 20 according to the embodiment are respectively provided with vent holes 28 which penetrate through the first piston cylinders 4 and then communicate with the outside. The air vent 28 can keep the air pressure in the right second piston cylinder 20 balanced, and the phenomenon that the device cannot be normally used due to negative pressure is avoided.

Furthermore, as shown in the drawings, the supporting plate 23 of the present embodiment is provided with a through hole 29. Through the through hole 29, the negative pressure formed between the second piston 21 and the support plate 23 can be avoided, which affects the normal use of the device.

Furthermore, as shown in the drawings, the inner lower sides of the stoppers 18 of the present embodiment are respectively provided with spherical grooves 30, and spherical balls 31 are movably mounted in the spherical grooves 30. The spherical groove 30 and the spherical ball 31 change the contact manner between the stopper 18 and the ring gear post 7 into rolling contact, thereby reducing the friction force.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a sealed effectual desulfurization waste water electrodialysis device, includes casing (1), its characterized in that: the ion exchange membrane ion exchanger is characterized in that two polar plates, a plurality of partition plates (2) and a plurality of ion exchange membranes are arranged in the shell (1) in a matched mode, each two ion exchange membranes divide the interior of the shell (1) into an independent space, the polar plates are respectively positioned on the front side and the rear side of the interior of the shell (1), the partition plates (2) are respectively placed between every two adjacent ion exchange membranes, a water inlet pipe (3) communicated with the interior of the shell (1) is fixedly installed on the left side of the shell (1), a plurality of first piston cylinders (4) are symmetrically distributed on the left side and the right side of the shell (1), the first piston cylinders (4) on the left side and the right side are respectively communicated with the interiors of the corresponding independent spaces, first pistons (5) are respectively and movably installed in the first piston cylinders (4), the opposite sides of the first pistons (5) are respectively fixedly connected with the inner walls of the first piston cylinders (4) through telescopic rods, the left end and the right end of a screw rod (6) are respectively fixedly connected with a corresponding first piston (5), an annular gear column (7) is sleeved on the periphery of the screw rod (6), a plurality of mounting grooves (8) are respectively formed in the upper side and the lower side of the inner wall of the annular gear column (7), balls (9) are respectively movably mounted in the mounting grooves (8), the inner sides of the inner walls of the mounting grooves (8) are respectively and fixedly connected with one end of a first spring (10), the other end of the first spring (10) is respectively and fixedly mounted with an arc plate (11), the inner arc surfaces of the arc plates (11) are respectively in sliding contact fit with the peripheries of the corresponding balls (9), the balls (9) can respectively roll on a threaded roller path on the corresponding screw rod (6), a waterproof motor (12) fixedly mounted on the lower side of the inner wall right side of a shell (1) is respectively arranged in each independent, the corresponding supports (13) are respectively and fixedly arranged at the left side and the right side of the inner wall of the shell (1), the periphery of an output shaft of the waterproof motor (12) is respectively and fixedly provided with two coaxial first gears (14), the lower part of the left first gear (14) is respectively provided with a second gear (15), the second gears (15) are respectively and bearing-mounted on the corresponding supports (13), the second gears (15) are respectively meshed with the corresponding left first gear (14), the lower part of the right first gear (14) is respectively provided with two vertically-arranged and mutually-meshed third gears (16), the upper third gear (16) is respectively meshed with the corresponding right first gear (14), the third gears (16) are respectively bearing-mounted on the corresponding supports (13), the diameter of the first gear (16) is the same as the radius of the second gear (15), the lower part of the first gear (14) is respectively provided with a fourth gear (17), the fourth gears (17) are respectively arranged on the corresponding supports (13) in a bearing mode, the fourth gear (17) on the left side is respectively meshed with the corresponding second gear (15), the fourth gear (17) on the right side is respectively meshed with the third gear (16) on the corresponding lower side, the fourth gears (17) can be respectively meshed with the corresponding annular gear columns (7), the opposite sides of the fourth gears (17) are respectively provided with a stop block (18), the stop blocks (18) are respectively and fixedly arranged on the corresponding supports (13), the stop blocks (18) can be respectively in sliding contact fit with the left side and the right side of the corresponding annular gear columns (7), the opposite sides of the first piston (5) are respectively provided with a reversing device (19), the outer sides of the inner walls of two first piston cylinders (4) corresponding to one independent space are respectively and fixedly provided with a second piston cylinder (20), and second pistons (21) are respectively arranged in the second piston cylinders (20), first spring rods (22) are respectively arranged between the second pistons (21) and the corresponding first pistons (5), two ends of each first spring rod (22) are respectively and fixedly connected with the corresponding first piston (5) and the corresponding second piston (21), the opposite sides of the second pistons (21) are respectively provided with a support plate (23) positioned in the second piston cylinder (20), the opposite surfaces between the second pistons (21) and the corresponding support plates (23) are respectively and fixedly provided with a conductive plate (24), the second pistons (21) on the left side are respectively and fixedly arranged in the second piston cylinders (20) on the left side, the right sides of the second pistons (21) on the right side are respectively and fixedly connected with one end of a second spring (25), one end of the second spring (25) is respectively and fixedly connected with the inner walls of the corresponding second piston cylinders (20), the lower sides of the peripheries of the first piston cylinders (4) are respectively provided with water outlets (26), and two liquid outlet (33) are formed in the bottom surface of the shell (1), the liquid discharge ports (33) are respectively communicated with the spaces between the corresponding electrode plates and the ion exchange membranes.

2. The electrodialysis device for desulfurization waste water with good sealing effect as claimed in claim 1, wherein: the reversing device (19) comprises a second spring rod (191) fixedly mounted on the opposite side of the corresponding first piston (5), and the outer sides of the bottom surfaces of the stoppers (18) are respectively hinged with a baffle (192) through torsion springs.

3. The electrodialysis device for desulfurization waste water with good sealing effect as claimed in claim 1, wherein: and a plurality of stirring blades (27) are fixedly arranged in the middle of the periphery of the annular gear column (7).

4. The electrodialysis device for desulfurization waste water with good sealing effect as claimed in claim 1, wherein: and the inner wall of the second piston cylinder (20) is respectively provided with a vent hole (28) which penetrates through the first piston cylinder (4) and is communicated with the outside.

5. The electrodialysis device for desulfurization waste water with good sealing effect as claimed in claim 1, wherein: the supporting plate (23) is provided with a through hole (29).

6. The electrodialysis device for desulfurization waste water with good sealing effect as claimed in claim 1, wherein: spherical grooves (30) are respectively formed in the lower sides of the inner sides of the stop blocks (18), and round balls (31) are movably mounted in the spherical grooves (30) respectively.