A device for treating sulfate radical in the brine system of the chlor-alkali industry

Abstract

The present invention belongs to the technical field of water treatment, and mainly mentions a device for treating sulfate radicals in the brine system of the chlor-alkali industry. It includes: a base; a reaction tank fixedly connected to the base; a water inlet device fixedly connected inside the reaction tank, the water inlet device is fixedly connected and communicated with a liquid inlet pipe, and the reaction tank is fixedly connected to the liquid inlet pipe; a water outlet tray hermetically and rotatably connected inside the reaction tank, a number of drain holes are provided on the water outlet tray, an ion exchange resin layer is arranged inside the reaction tank, and the bottom of the reaction tank is fixedly connected and communicated with a liquid outlet pipe. By rotating the water outlet tray, the position of the drain holes on the water outlet tray is continuously changed, the flow area of the brine in the ion exchange resin layer is changed, so that the brine evenly flows through the ion exchange resin layer, reducing the probability of the brine having a flow dead angle, improving the uniformity of the reaction between the ion exchange resin layer and the brine, and further increasing the probability of removing sulfate ions in the brine.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and particularly relates to a device for treating sulfate radicals in a brine system of the chlor-alkali industry. Background Art

[0002] In the chlor-alkali industry, the treatment of sulfate radicals in the brine system is an important technological process. The presence of sulfate radicals will have an adverse impact on the subsequent processes, such as causing scaling, corrosion, or reducing the equipment efficiency, etc. An ion exchanger is a device used for separating, purifying, or softening water. Its core principle is to utilize the characteristics of ion exchange resins to remove impurity ions in water through ion exchange reactions, which can effectively improve water quality and meet the requirements of different scenarios. Therefore, ion exchangers are often used to remove harmful ions in brine. Among them, ion exchangers are mainly divided into cation exchangers (removing cations in water), anion exchangers (removing anions in water), and mixed ion exchangers (removing both cations and anions in water), and are selected according to the characteristics of the ions mainly removed in water. When the existing ion exchangers remove ions in water, since the positions of the drainage holes at the bottom of the ion exchanger are mostly fixed, when water flows through the ion exchange resin, the flow area of the water in the ion exchange resin mainly concentrates above the drainage holes, and dead flow areas are extremely likely to appear at positions far from the drainage holes, resulting in incomplete or overly complete reactions in some local ion exchange resins, so that the ion exchange resin cannot react evenly with water, and finally it is difficult to completely remove the ions that need to be removed from the water. Summary of the Invention

[0003] In order to overcome the disadvantages mentioned in the above background art, the present invention provides a device for treating sulfate radicals in a brine system of the chlor-alkali industry.

[0004] Technical Solution: A device for treating sulfate radicals in a brine system of the chlor-alkali industry, comprising: a base; a reaction tank fixedly connected to the base; a water inlet device fixedly connected inside the reaction tank, the water inlet device being fixedly connected and communicating with a liquid inlet pipe, and the reaction tank being fixedly connected to the liquid inlet pipe; a water outlet tray sealingly and rotatably connected inside the reaction tank, the water outlet tray being provided with a plurality of drainage holes, an ion exchange resin layer being arranged inside the reaction tank between the water inlet device and the water outlet tray, and the bottom of the reaction tank being fixedly connected and communicating with a liquid outlet pipe; a rotating assembly arranged inside the reaction tank for driving the water outlet tray to rotate and changing the positions of the drainage holes on the water outlet tray.

[0005] In addition, it is particularly preferred that the rotating assembly includes: a servo motor, a connecting frame is fixedly connected to the reaction tank, the servo motor is fixedly connected to the connecting frame of the reaction tank, and an output shaft of the servo motor is fixedly connected to a rotating table; a rotating shaft, fixedly connected to the water outlet tray, the rotating shaft is spline-connected to a transmission disc located outside the reaction tank, and the rotating table is in contact with the transmission disc; an adjusting assembly, arranged on the reaction tank for changing the position of the transmission disc.

[0006] In addition, it is particularly preferred that the adjusting assembly includes: a first gear, rotatably connected to the reaction tank, the first gear is fixedly connected to a centrifugal disc, and a plurality of push blocks are slidably connected to the centrifugal disc; a sliding block, slidably and rotatably connected to the centrifugal disc, all the push blocks are used to jointly push the sliding block to move, the sliding block is in limiting sliding connection with the transmission disc, and a first elastic member is arranged between the sliding block and the centrifugal disc; a driving assembly, arranged in the water inlet device for driving the first gear to rotate.

[0007] In addition, it is particularly preferred that the driving assembly includes: a sleeve, hermetically rotatably connected to the reaction tank, both the water inlet device and the rotating shaft are hermetically rotatably connected to the sleeve, and the sleeve is fixedly connected to a vortex fan located in the water inlet device; a second gear, fixedly connected to the sleeve, and the second gear meshes with the first gear.

[0008] In addition, it is particularly preferred that the pitch circle radius of the second gear is greater than the pitch circle radius of the first gear.

[0009] In addition, it is particularly preferred that there is also: an anti-blocking assembly, arranged in the reaction tank for periodically backwashing the drain holes on the water outlet tray, the anti-blocking assembly includes: a plurality of backwashing shells, all fixedly connected to the water outlet tray, and the drain holes on the water outlet tray are communicated with the adjacent backwashing shells, the backwashing shells are fixedly connected and communicated with drain pipes, and a backwashing piston is hermetically slidably connected to the backwashing shell; a sliding assembly, arranged in the reaction tank for driving all the backwashing pistons to slide along the adjacent backwashing shells.

[0010] In addition, it is particularly preferred that the backwashing piston is slidably connected to a push rod, and a second elastic member is arranged between the backwashing piston and the push rod.

[0011] In addition, it is particularly preferred that the sliding assembly includes: a sliding ring, a fixing frame is fixedly connected in the reaction tank, the sliding ring is spline-connected to the fixing frame, the sliding ring is fixedly connected with circumferentially distributed extrusion blocks, and the extrusion blocks are used to push all the push rods to move; a pushing assembly, arranged on the sliding ring for periodically driving the sliding ring to slide along the fixing frame in the reaction tank.

[0012] In addition, it is particularly preferred that the pushing component includes: a rotating member rotatably connected to the water outlet tray; a clamping block fixedly connected to the rotating member, a sliding groove is provided on the inner wall of the sliding ring, and the clamping block is slidably located in the sliding groove; a transmission component is provided on the rotating shaft for driving the rotating member to rotate.

[0013] In addition, it is particularly preferred that the transmission component includes: a third gear fixedly connected to the water outlet tray; a fourth gear rotatably connected inside the reaction tank, the third gear meshes with the fourth gear; a toothed ring fixedly connected to the rotating member, and the toothed ring meshes with the fourth gear.

[0014] Advantages of the present invention: 1. By rotating the water outlet tray, the position of the drain holes on the water outlet tray is continuously changed, the flow area of the brine in the ion exchange resin layer is changed, the brine evenly flows through the ion exchange resin layer, the probability of the brine having a flow dead angle is reduced, the uniformity of the reaction between the ion exchange resin layer and the brine is improved, and further the probability of removing sulfate ions in the brine is increased.

[0015] 2. By automatically detecting the conveying speed of the brine, when the conveying speed of the brine changes, the rotation speed of the water outlet tray is automatically adjusted, so that the flow speed of the brine synchronously changes with the speed of the water outlet tray, ensuring uniform reaction between the ion exchange resin layer and the brine and stably removing the content of sulfate ions in the brine.

[0016] 3. By regularly and automatically performing backwashing operations on the drain holes on the water outlet tray, the resin is separated from the drain holes on the water outlet tray, ensuring uniform reaction between the ion exchange resin layer and the brine. At the same time, for the completely blocked drain holes, by sliding the push rod along the backwashing piston, the backwashing force of the backwashing piston on the drain holes on the water outlet tray is automatically offset, reducing the operating load of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is a three-dimensional structural sectional schematic diagram of the reaction tank of the present invention;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the first gear and the centrifugal disk of the present invention;

[0020] Figure 4 is a three-dimensional structural sectional schematic diagram of the sliding block of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the backwashing shell and the sliding ring of the present invention;

[0022] Figure 6Schematic cross-sectional view of the three-dimensional structure of the recoil housing of the present invention;

[0023] Figure 7 Schematic cross-sectional view of the three-dimensional structure of the rotating member of the present invention;

[0024] Figure 8 Schematic three-dimensional structure view of the sliding groove of the present invention.

[0025] In the figure: 1, base; 2, reaction tank; 3, water inlet; 4, water outlet tray; 5, ion exchange resin layer; 201, servo motor; 202, rotating table; 203, rotating shaft; 204, transmission disc; 301, first gear; 302, centrifugal disc; 303, push block; 304, sliding block; 305, first elastic member; 306, sleeve; 307, vortex fan; 308, second gear; 401, recoil housing; 402, drain tube; 403, recoil piston; 404, push rod; 405, second elastic member; 406, sliding ring; 407, extrusion block; 501, rotating member; 502, clamping block; 503, sliding groove; 504, third gear; 505, fourth gear; 506, toothed ring. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0027] When the existing ion exchanger removes ions in water, since the drain holes at the bottom of the ion exchanger are in a fixed state, the water flow tends to concentrate and flow above the drain holes. Therefore, flow dead zones are likely to occur in places far from the drain holes, resulting in incomplete or overly complete reactions of the local ion exchange resin. This uneven water flow distribution makes it difficult for the ion exchange resin to react evenly with water, and as a result, the target ions in the water are difficult to be completely removed.

[0028] A sulfate treatment device in a chlor-alkali industrial brine system, as Figures 1-3 shown, includes: a base 1; a reaction tank 2 fixedly connected to the base 1; a water inlet 3 fixedly connected inside the reaction tank 2, the water inlet 3 being fixedly connected and communicating with a liquid inlet pipe, and the reaction tank 2 being fixedly connected to the liquid inlet pipe; a water outlet tray 4 sealingly rotatably connected inside the reaction tank 2, the water outlet tray 4 being provided with a plurality of drain holes, an ion exchange resin layer 5 being provided inside the reaction tank 2 between the water inlet 3 and the water outlet tray 4, and the bottom of the reaction tank 2 being fixedly connected and communicating with a liquid outlet pipe; a rotating assembly provided inside the reaction tank 2 for driving the water outlet tray 4 to rotate and changing the positions of the drain holes on the water outlet tray 4.

[0029] In the above solution, the reaction tank 2 is made of fiberglass. The reaction tank 2 needs to come into contact with brine and sulfate medium, and requires a material with strong corrosion resistance. The water inlet 3 is composed of a main cylinder and several auxiliary cylinders evenly distributed circumferentially, so that the brine flows downward evenly and reacts with the ion exchange resin layer 5. The drainage holes on the water outlet tray 4 are evenly distributed circumferentially. The ion exchange resin layer 5 is an anion (such as D301 and D201). The water outlet tray 4 is in a fitting state with the ion exchange resin layer 5. In the present invention, by rotating the water outlet tray 4, the positions of the drainage holes on the water outlet tray 4 are continuously changed, so that the flow area of the brine in the ion exchange resin layer 5 is changed, ensuring that the brine flows evenly through the ion exchange resin layer 5, reducing the probability of flow dead zones in the brine in the ion exchange resin layer 5, improving the uniformity of the reaction between the ion exchange resin layer 5 and the brine, and increasing the probability of removing sulfate ions in the brine.

[0030] Specifically, as Figures 1-3 shown, the rotation assembly includes: a servo motor 201. A connecting frame is fixedly connected to the reaction tank 2, the servo motor 201 is fixedly connected to the connecting frame of the reaction tank 2, and the output shaft of the servo motor 201 is fixedly connected to a rotating table 202; a rotating shaft 203, fixedly connected to the water outlet tray 4. The rotating shaft 203 is splined with a transmission disk 204 located outside the reaction tank 2, and the rotating table 202 is in contact with the transmission disk 204; an adjusting assembly, arranged on the reaction tank 2, for changing the position of the transmission disk 204.

[0031] In the above solution, the rotating table 202 has a frustum structure, and the side of the rotating table 202 with a larger diameter is located above, and the side with a smaller diameter is located below. Rough surfaces are provided on the exteriors of both the rotating table 202 and the transmission disk 204 to provide sufficient friction force, and the rotation of the water outlet tray 4 is realized through the rotating table 202, the transmission disk 204, and the rotating shaft 203.

[0032] Specifically, as Figures 2-4 shown, the adjusting assembly includes: a first gear 301, rotatably connected to the reaction tank 2. The first gear 301 is fixedly connected to a centrifugal disk 302, and several push blocks 303 are slidably connected to the centrifugal disk 302; a sliding block 304, slidably and rotatably connected to the centrifugal disk 302. All the push blocks 303 are used to jointly push the sliding block 304 to move. The sliding block 304 is in a limiting sliding connection with the transmission disk 204, and a first elastic member 305 is arranged between the sliding block 304 and the centrifugal disk 302; a driving assembly, arranged in the water inlet 3, for driving the first gear 301 to rotate.

[0033] In the above solution, the first gear 301 is located at the top of the reaction tank 2. The number of the push blocks 303 can be freely set. The push blocks 303 are circumferentially equidistantly distributed on the centrifugal disk 302. The central axis of the first gear 301 coincides with the central axis of the centrifugal disk 302. An inclined surface is provided on the upper side of the push block 303, and a frustum-shaped groove is provided on the lower side of the sliding block 304. The inclined surface of the push block 303 is attached to the side surface of the frustum-shaped groove on the sliding block 304, which is used to make the push block 303 push the sliding block 304 to slide upward along the centrifugal disk 302. The first elastic member 305 is a spring, which is used to drive the sliding block 304 to slide downward along the centrifugal disk 302. By automatically detecting the conveying speed of the brine, when the conveying speed of the brine changes, the rotation speed of the water outlet disk 4 is automatically adjusted to make the flow speed of the brine synchronously change with the rotation speed of the water outlet disk 4, ensuring that the reaction between the ion exchange resin layer 5 and the brine is uniform and stably removing the sulfate content in the brine.

[0034] Specifically, as Figures 2-4 shown, the driving assembly includes: a sleeve 306, which is hermetically and rotatably connected to the reaction tank 2. The water inlet 3 and the rotating shaft 203 are both hermetically and rotatably connected to the sleeve 306. The sleeve 306 is fixedly connected with a vortex fan 307 located inside the water inlet 3; a second gear 308, which is fixedly connected to the sleeve 306. The second gear 308 meshes with the first gear 301. The pitch circle radius of the second gear 308 is greater than the pitch circle radius of the first gear 301.

[0035] In the above solution, the vortex fan 307 is used to detect the actual conveying speed of the brine, and drives the sleeve 306 to rotate by means of the thrust of the water flow, so that the sleeve 306 drives the second gear 308 to rotate. The pitch circle radius of the second gear 308 is greater than the pitch circle radius of the first gear 301, so that when the second gear 308 rotates one circle, the first gear 301 rotates five to six circles, forming an acceleration system to prevent the flow speed of the brine from being too slow to supply enough rotation speed to the centrifugal disk 302.

[0036] Working principle: When it is necessary to remove the sulfate in the brine, the brine to be treated enters the water inlet 3 through the liquid inlet pipe. The brine evenly enters the reaction tank 2 from the water inlet 3, gradually filling the reaction tank 2. Then, the liquid outlet pipe at the bottom of the reaction tank 2 is opened. At this time, the brine flows downward in the reaction tank 2. The brine passes through the ion exchange resin layer 5. The ion exchange resin layer 5 eliminates the sulfate ions in the brine through an exchange reaction. The purified water after the reaction flows downward along the drain holes on the water outlet disk 4 and finally is discharged along the liquid outlet pipe at the bottom of the reaction tank 2.

[0037] When opening the liquid outlet pipe, the servo motor 201 is turned on. The output shaft of the servo motor 201 drives the turntable 202 to rotate, causing the turntable 202 to drive the rotating shaft 203 to rotate through the transmission disc 204. The rotating shaft 203 drives the water outlet disc 4 to rotate, continuously changing the positions of the drainage holes on the water outlet disc 4, changing the flow area of the brine in the ion exchange resin layer 5, making the brine flow evenly through the ion exchange resin layer 5, and avoiding the situation where the positions of the drainage holes on the water outlet disc 4 remain fixed, resulting in the flow area of the brine in the reaction tank 2 tending to be stable, and then there being flow dead zones, leading to uneven reaction between the ion exchange resin layer 5 and the brine, and further reducing the removal probability of sulfate ions in the brine.

[0038] During the process of removing sulfate ions from the brine, since the brine is transported by pumping, after long-term use, due to the wear and aging of the internal parts of the pump, it is extremely easy for the pumping speed of the brine to deviate, resulting in a mismatch between the flow rate of the brine and the rotation speed of the water outlet disc 4. Due to the change in the brine flow rate, the rotation speed of the drainage holes is insufficient or accelerated relative to the brine speed, causing the amount of brine flowing through some areas to change, resulting in incomplete removal of sulfate ions in the brine, and further leading to uneven reaction between the ion exchange resin layer 5 and the brine. When the brine enters the reaction tank 2 from the water inlet 3, the brine drives the sleeve 306 to rotate through the vortex fan 307. The sleeve 306 drives the second gear 308 to rotate. The second gear 308 drives the centrifugal disc 302 to rotate through the first gear 301, causing the circumferentially distributed push blocks 303 to slide outward under the centrifugal force and push the sliding block 304 upward. The sliding block 304 drives the transmission disc 204 upward. At the same time, the first elastic member 305 is compressed. In this way, until the centrifugal force on the push block 303 is balanced with the sum of the elastic force of the first elastic member 305 and the gravity of the sliding block 304, the transmission disc 204 stops moving. At this time, the rotation speed of the water outlet disc 4 is in a matching state with the flow rate of the brine.

[0039] When the pumping speed changes, here it is described with the increase in the brine speed. The brine at the water inlet 3 drives the vortex fan 307 to rotate faster, that is, the rotation speed of the centrifugal disc 302 increases. At this time, the centrifugal force on the circumferentially distributed push blocks 303 increases, and they further slide outward along the centrifugal disc 302 and push the sliding block 304 upward. At the same time, the first elastic member 305 is further compressed, causing the sliding block 304 to drive the transmission disc 204 upward, increasing the transmission ratio of the turntable 202 to the transmission disc 204, accelerating the rotation speed of the transmission disc 204, and causing the transmission disc 204 to drive the rotation speed of the water outlet disc 4 to increase synchronously through the rotating shaft 203, ensuring uniform reaction between the ion exchange resin layer 5 and the brine and stably removing the content of sulfate ions in the brine. When the centrifugal force on the push block 303 is balanced with the sum of the elastic force of the first elastic member 305 and the gravity of the sliding block 304 again, the transmission disc 204 stops moving.

[0040] After the exchange capacity of the ion exchange resin layer 5 decreases, the injection of brine into the inlet pipe is stopped at this time, and a regeneration solution is injected into the inlet pipe to make the regeneration solution react with the ion exchange resin layer 5 to restore the exchange capacity of the ion exchange resin layer 5. In this way, until the exchange capacity of the ion exchange resin layer 5 is fully restored, the regeneration solution is switched back to brine again to continue removing sulfate radicals in the brine. This cycle repeats until the brine treatment work is completed. Then, the injection of brine into the reaction tank 2 is stopped, and the brine in the reaction tank 2 is drained. Then, the servo motor 201 and the lower outlet pipe are closed. At this time, there is no flowing brine in the water inlet device 3, so the turbine fan 307 cannot be driven to rotate, the centrifugal disk 302 stops rotating, the first elastic member 305 resets and drives all the push blocks 303 to reset. At the same time, the transmission disk 204 resets to the initial state. When it is necessary to remove sulfate radicals in the brine again, the above steps are repeated.

[0041] In a further embodiment, specifically, as Figure 5 and Figure 6 shown, it further includes: an anti-blocking component, which is arranged in the reaction tank 2 and is used for periodically backwashing the drainage holes on the water outlet disk 4. The anti-blocking component includes: a backwashing shell 401, which has several and is fixedly connected to the water outlet disk 4, and the drainage holes on the water outlet disk 4 are communicated with the adjacent backwashing shells 401. The backwashing shell 401 is fixedly connected and communicated with a drainage cylinder 402. The backwashing shell 401 is hermetically slidably connected with a backwashing piston 403; a sliding component, which is arranged in the reaction tank 2 and is used for driving all the backwashing pistons 403 to slide along the adjacent backwashing shells 401; the backwashing piston 403 is slidably connected with a push rod 404, and a second elastic member 405 is arranged between the backwashing piston 403 and the push rod 404.

[0042] In the above solution, the number of the backwashing shells 401 can be freely set and is circumferentially and equally spaced on the water outlet disk 4, so that all the drainage holes on the water outlet disk 4 are connected and communicated with the backwashing shells 401. The drainage cylinder 402 is connected to the middle of the backwashing shell 401, leaving a sliding distance for the backwashing piston 403 during backwashing. Initially, as Figure 6 shown, the backwashing piston 403 is located below the connection of the drainage cylinder 402 and the backwashing shell 401. The second elastic member 405 is a spring, which is used to compress and offset the backwashing force of the backwashing piston 403 on the drainage hole when the drainage holes on the water outlet disk 4 corresponding to the adjacent backwashing shells 401 are completely blocked. By performing a backwashing operation on the drainage holes on the water outlet disk 4, the resin is separated from the drainage holes on the water outlet disk 4, and the blocked state of the drainage holes on the water outlet disk 4 is released, ensuring uniform reaction between the ion exchange resin layer 5 and the brine.

[0043] Specifically, as Figure 2 、 Figure 5 and Figure 7As shown in the figure, the sliding assembly includes: a sliding ring 406. There is a fixed frame fixedly connected inside the reaction tank 2. The sliding ring 406 is splined to the fixed frame. The sliding ring 406 is fixedly connected with circumferentially distributed extrusion blocks 407, and the extrusion blocks 407 are used to push all the push rods 404 to move; a pushing assembly is arranged on the sliding ring 406 and is used to periodically drive the sliding ring 406 to slide along the fixed frame inside the reaction tank 2.

[0044] In the above solution, both the sliding ring 406 and the extrusion blocks 407 are provided with corrosion-resistant layers to resist the erosion of brine and extend the service life. The sliding ring 406 is located below the water outlet tray 4. The extrusion blocks 407 have symmetrically distributed inclined surfaces for pushing the push rods 404 upward, so that the push rods 404 drive the adjacent backflush pistons 403 to perform backflush operations. The number of the extrusion blocks 407 is at most half of the number of the backflush shells 401, ensuring that the brine in half of the backflush shells 401 is in a normal flowing state and maintaining the normal operation of the device.

[0045] Specifically, as Figure 5 、 Figure 7 and Figure 8 shown, the pushing assembly includes: a rotating member 501 rotatably connected to the water outlet tray 4; a clamping block 502 fixedly connected to the rotating member 501. A sliding groove 503 is provided on the inner wall of the sliding ring 406, and the clamping block 502 slides in the sliding groove 503; a transmission assembly is arranged on the rotating shaft 203 and is used to drive the rotating member 501 to rotate.

[0046] In the above solution, both the rotating member 501 and the clamping block 502 are provided with corrosion-resistant layers. The sliding groove 503 is composed of a short annular groove, a long annular groove and two spiral grooves connected end to end. The length of the long annular groove is five to six times the length of the short annular groove. The clamping block 502 slides along the sliding groove 503, causing the sliding ring 406 to slide up and down reciprocally along the fixed frame inside the reaction tank 2, and further causing the backflush piston 403 to perform backflush on the drain holes on the water outlet tray 4.

[0047] Specifically, as Figure 2 、 Figure 7 and Figure 8 shown, the transmission assembly includes: a third gear 504 fixedly connected to the water outlet tray 4; a fourth gear 505 rotatably connected inside the reaction tank 2. The third gear 504 meshes with the fourth gear 505; a toothed ring 506 is fixedly connected to the rotating member 501, and the toothed ring 506 meshes with the fourth gear 505.

[0048] In the above scheme, the third gear 504, the fourth gear 505 and the gear ring 506 are all provided with a corrosion-resistant layer, the pitch circle radius of the third gear 504 is smaller than the pitch circle radius of the fourth gear 505, and the pitch circle radius of the fourth gear 505 is smaller than the pitch circle radius of the gear ring 506, so that the water outlet plate 4 drives the third gear 504 to rotate five to six circles, and the gear ring 506 can rotate one circle, forming a deceleration system, thereby realizing that the sliding ring 406 slides upward along the fixed frame in the reaction tank 2 regularly, avoiding continuous recoil of the water outlet plate 4, affecting the flow of water in the reaction tank 2, and reducing the degree of removal of sulfate ions in the brine by the ion exchange resin layer 5.

[0049] Working principle: When the ion exchange resin layer 5 in the reaction tank 2 processes the brine, the resin will age after long-term use, causing the particles to break or become smaller. These fine particles may enter the drainage hole and block the channel, and finally block the drainage hole on the water outlet tray 4, thereby causing the water flow to be unable to flow downward evenly, reducing the uniform reaction between the ion exchange resin layer 5 and the brine. During the rotation of the water outlet tray 4, the brine entering the drainage hole of the water outlet tray 4 will enter the corresponding recoil shell 401, and then enter the adjacent drainage tube 402 from the recoil shell 401. The water continues to flow downward from the drainage tube 402 and is finally discharged along the liquid outlet pipe at the bottom of the reaction tank 2.

[0050] When the water outlet tray 4 drives all the recoil shells 401 at the bottom to rotate, the recoil shell 401 drives the push rod 404 inside to rotate synchronously. The push rod 404 rotates and contacts the adjacent extrusion block 407. The extrusion block 407 squeezes the adjacent push rod 404, so that the push rod 404 is forced to drive the recoil piston 403 to slide along the recoil shell 401, pushing the water in the recoil shell 401 upward and draining it along the drainage hole on the water outlet tray 4, thereby forming a recoil, impacting the resin blocked in the drainage hole of the water outlet tray 4, and releasing the blockage of the drainage hole on the water outlet tray 4. When the drainage hole corresponding to the recoil shell 401 is completely blocked, At this time, the recoil piston 403 is difficult to push, so that the recoil piston 403 and the push rod 404 slide relative to each other, and the second elastic member 405 is compressed to offset the thrust of the push rod 404, thereby preventing the servo motor 201 from increasing load and being damaged. When the push rod 404 is separated from the extrusion block 407, the recoil piston 403 is reset downward by the water flow, and the recoil piston 403 drives the push rod 404 to reset downward synchronously through the second elastic member 405, so that the salt water in the reaction tank 2 continues to flow along the drainage hole on the water outlet tray 4, the recoil shell 401 and the drainage cylinder 402, and is discharged along the liquid outlet pipe.

[0051] During the rotation of the water outlet tray 4, the water outlet tray 4 drives the third gear 504 at the bottom to rotate synchronously. The third gear 504 drives the toothed ring 506 to rotate through the fourth gear 505. The toothed ring 506 drives the rotating member 501 to rotate. The rotating member 501 drives the clamping block 502 thereon to rotate. The clamping block 502 slides along the sliding groove 503 of the sliding ring 406. When the clamping block 502 is located in the long annular groove of the sliding groove 503, the upper side surface of the sliding ring 406 is separated from a number of push rods 404 and there is a certain distance (this distance is greater than the height of the extrusion block 407). The push rod 404 cannot contact the extrusion block 407, and the backflush shell 401 cannot backflush the drain holes of the corresponding water outlet tray 4. When the clamping block 502 is located in the short annular groove of the sliding groove 503, the sliding ring 406 is located above the fixed frame of the reaction tank 2. At this time, the upper side surface of the sliding ring 406 is in contact with the push rod 404. The backflush shell 401 drives the internal push rod 404 to contact the extrusion block 407, and then backflushes the drain holes of the water outlet tray 4. Since the radius of the toothed ring 506 is greater than the radius of the third gear 504, when the third gear 504 rotates five or six circles, the toothed ring 506 rotates one circle, that is, the sliding ring 406 moves upward regularly to backflush the water outlet tray 4, avoiding continuous backflushing of the water outlet tray 4, affecting the flow of water in the reaction tank 2, and reducing the removal degree of sulfate ions in the brine by the ion exchange resin layer 5.

[0052] So until the brine treatment is stopped, at this time, the servo motor 201 is turned off, the rotation of the water outlet tray 4 is stopped, and the corresponding backflush shell 401 and the third gear 504 both stop rotating. When the brine needs to remove sulfate ions again, repeat the above steps.

[0053] The above are only examples of the present invention and are not used to limit the present invention. All equivalent substitutions made within the principle of the present invention shall be included within the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the well-known prior art of those skilled in the art.

Claims

1. A sulfate treatment device in a chlor-alkali industrial brine system, characterized in that: Included are: Base (1); A reaction tank (2) fixedly connected to the base (1); A water inlet (3) is fixedly connected to the reaction tank (2); the water inlet (3) is fixedly connected to and communicates with a liquid inlet pipe; the reaction tank (2) is fixedly connected to the liquid inlet pipe; A water outlet plate (4) is sealed and rotatably connected to the reaction tank (2); a plurality of drainage holes are provided on the water outlet plate (4); an ion exchange resin layer (5) is provided in the reaction tank (2) and is located between the water inlet (3) and the water outlet plate (4); and a bottom of the reaction tank (2) is fixedly connected and communicated with a liquid outlet pipe; A rotating assembly, disposed in the reaction tank (2), and used to drive the water outlet tray (4) to rotate, thereby changing the position of the drainage hole on the water outlet tray (4); Also included are: An anti-blocking component is arranged in the reaction tank (2) and is used for periodically backflushing the drainage holes on the water outlet tray (4). The anti-blocking component comprises: The recoil shells (401) have a plurality of them, all of which are fixedly connected to the water outlet tray (4), and the drainage holes on the water outlet tray (4) are connected to the adjacent recoil shells (401), the recoil shells (401) are fixedly connected and connected to the drainage cylinder (402), and the recoil shells (401) are sealingly and slidably connected to the recoil piston (403); A sliding assembly, disposed in the reaction tank (2), and used to drive all the recoil pistons (403) to slide along adjacent recoil shells (401); The recoil piston (403) is slidably connected to a push rod (404), and a second elastic member (405) is provided between the recoil piston (403) and the push rod (404); The sliding assembly comprises: A sliding ring (406), the reaction tank (2) is fixedly connected to a fixing frame, the sliding ring (406) is spline-connected to the fixing frame, the sliding ring (406) is fixedly connected to circumferentially distributed extrusion blocks (407), and the extrusion blocks (407) are used to push all the push rods (404) to move; A pushing component is arranged on the sliding ring (406) and is used to periodically drive the sliding ring (406) to slide along the fixed frame inside the reaction tank (2).

2. The sulfate treatment device in a chlor-alkali industrial brine system according to claim 1, characterized in that: The rotating assembly comprises: A servo motor (201), the reaction tank (2) being fixedly connected to a connecting frame, the servo motor (201) being fixedly connected to the connecting frame of the reaction tank (2), and an output shaft of the servo motor (201) being fixedly connected to a rotating platform (202); A rotating shaft (203) is fixedly connected to the water outlet plate (4); the rotating shaft (203) is spline-connected to a transmission plate (204) located outside the reaction tank (2); and the rotating platform (202) is in close contact with the transmission plate (204); An adjustment component is arranged on the reaction tank (2) and is used to change the position of the transmission disc (204).

3. The sulfate treatment device in a chlor-alkali industrial brine system according to claim 2, characterized in that: The adjustment component includes: A first gear (301) is rotatably connected to the reaction tank (2); the first gear (301) is fixedly connected to a centrifugal disk (302); and the centrifugal disk (302) is slidably connected to a plurality of push blocks (303); A sliding block (304) is slidably and rotatably connected to the centrifugal disk (302); all the push blocks (303) are used to jointly push the sliding block (304) to move; the sliding block (304) is slidably connected to the transmission disk (204); and a first elastic member (305) is provided between the sliding block (304) and the centrifugal disk (302); A driving assembly is arranged in the water inlet (3) and is used to drive the first gear (301) to rotate.

4. The sulfate treatment device in a chlor-alkali industrial brine system according to claim 3, characterized in that: The drive assembly comprises: A sleeve (306) is sealingly and rotatably connected to the reaction tank (2); the water inlet (3) and the rotating shaft (203) are both sealingly and rotatably connected to the sleeve (306); and the sleeve (306) is fixedly connected to a turbofan (307) located in the water inlet (3); The second gear (308) is fixedly connected to the sleeve (306), and the second gear (308) is meshed with the first gear (301).

5. The sulfate treatment device in the chlor-alkali industrial brine system according to claim 4 is characterized in that: The pitch circle radius of the second gear (308) is greater than the pitch circle radius of the first gear (301).

6. The sulfate treatment device in a chlor-alkali industrial brine system according to claim 2, characterized in that: The pushing component comprises: A rotating member (501) rotatably connected to the water outlet tray (4); A clamping block (502) is fixedly connected to the rotating member (501); the inner wall of the sliding ring (406) is provided with a sliding groove (503); the clamping block (502) is located in the sliding groove (503) and slides; A transmission assembly is arranged on the rotating shaft (203) and is used to drive the rotating member (501) to rotate.

7. The sulfate treatment device in the chlor-alkali industrial brine system according to claim 6 is characterized in that: The transmission assembly comprises: A third gear (504) fixedly connected to the water outlet tray (4); A fourth gear (505) is rotatably connected to the interior of the reaction tank (2), and the third gear (504) is meshed with the fourth gear (505); A gear ring (506) is fixedly connected to the rotating member (501), and the gear ring (506) is meshed with the fourth gear (505).

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