Anti-blocking self-cleaning type high-speed ion exchange device

Abstract

The invention discloses an anti-blocking self-cleaning type high-speed ion exchange device which is characterized in that a water distribution plate of a water distribution cap is arranged at the upper end in a high-speed mixed ion exchanger, a filter screen of the water cap faces the upper part of the water distribution plate, a hollow screw rod faces the lower part of the water distribution plate, the hollow screw rod is fixedly connected to the water distribution plate, and the filter screen is rotationally connected with the hollow screw rod; flushing water outlets are evenly formed in the side wall above a water distribution plate of the high-speed mixed ion exchanger, the flushing water outlets are opened in the operation process to enable water to achieve cross flow, and a water cap is flushed and made to rotate. A novel water cap structure is designed, meanwhile, a multi-angle flushing water outlet is additionally arranged, multi-angle lateral flushing of the water cap of the water distribution plate can be achieved, the inverted water cap is driven to rotate through the action of water flow, and resin particles entering the position above the water distribution plate are not prone to blocking the water cap; water and resin particles in the high-speed mixed ion exchanger can be discharged by opening the multi-angle flushing water outlet, and the problem that the resin particles remain above a water distribution plate in the high-speed mixed ion exchanger is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an anti-clogging self-cleaning high-speed ion exchange device. Background Art

[0002] Condensate polishing refers to the process of using cooling water or air to condense the steam in the turbine into water during thermal power generation, and then purify the condensed water for reuse. Maintaining the efficient and stable operation of the condensate polishing system is an important guarantee for thermal power generation. The condensate polishing process mainly uses the resin ion exchange in the high-speed mixed ion exchanger to remove impurities in the condensate. In the actual operation process, the resin will inevitably break or be damaged, which will affect the overall operation effect of the polishing.

[0003] After the ion exchange resin has been used for a period of time, the impurities adsorbed are close to the saturation state, and it is necessary to regenerate the resin. Chemical agents are used to remove the ions and other impurities adsorbed by the resin to restore its original composition and performance. Ion exchange resins may also cause resin particles to break during the regeneration process. The main reasons are as follows: 1. Volume changes caused by chemical transformation, such as expansion and contraction: During the regeneration process, the resin undergoes repeated chemical transformations (such as the conversion of failure state and regeneration state) due to the alternating action of acid and alkali solutions, resulting in periodic expansion and contraction of particles. Long-term accumulated mechanical stress will cause the resin skeleton to age and crack, similar to the phenomenon of metal fatigue. Functional group fracture: Repeated volume changes may break the functional groups or mesh structures inside the resin, and eventually cause the particles to break into powder. 2. Improper regeneration operating conditions, such as excessive concentration of regenerant, drastic temperature fluctuations, poor pressure or flow rate control, etc., may aggravate the friction and collision between resin particles and equipment walls and particles, causing breakage. When the damaged resin particles are transporting the regenerated resin in the high-speed mixed ion exchanger, they often enter the upper space of the water distribution plate through the gaps on the water distribution plate, the water cap, etc. In addition, the water distribution plate and the water cap filter will deform after long-term use, causing the gaps to become larger, and will also cause some resin and incompletely broken resin to enter the top of the water distribution plate. When the resin particles that enter the upper part of the water distribution plate are normally treated with condensate water, due to the high water inlet pressure, they will be compacted by high pressure after entering the water cap, resulting in the water cap water flow rate being affected, resulting in the high-speed mixed ion exchanger The processing capacity cannot meet the requirements, thereby affecting the overall operation effect of the fine treatment. Summary of the invention

[0004] In view of the problem in the prior art that resin particles in the resin regeneration process enter the upper space of the water distribution plate through gaps and water caps on the water distribution plate when the regenerated resin is transported, and cause clogging of the water cap during normal treatment of condensed water, the present invention provides an anti-clogging self-cleaning high-speed ion exchange device.

[0005] The object of the present invention is achieved in the following way: a blockage-proof self-cleaning high-speed ion exchange device, comprising a high-speed mixed ion exchanger, a water inlet and a resin inlet are arranged on the top of the high-speed mixed ion exchanger, a water outlet and a resin outlet are arranged on the bottom, a water distribution plate is arranged at the upper end of the high-speed mixed ion exchanger, a water cap is arranged on the water distribution plate, the water cap comprises a filter screen and a hollow screw, the filter screen faces the top of the water distribution plate, the hollow screw faces the bottom of the water distribution plate, the hollow screw is fixedly connected to the water distribution plate, the filter screen is rotatably connected to the hollow screw, flushing outlets are evenly arranged on the side wall above the water distribution plate of the high-speed mixed ion exchanger, and the flushing outlets are opened during operation to achieve cross-flow of water in the high-speed mixed ion exchanger, flush the water cap and rotate the water cap.

[0006] The first rotating surface is fixedly connected to the bottom of the filter, and the second rotating surface is fixedly connected to the top of the hollow screw. The first rotating surface and the second rotating surface are connected to each other through a connecting piece at the periphery, and a water hole connected to the hollow screw is arranged in the center. The first rotating surface and the filter can rotate under the action of water flow.

[0007] The flushing outlet is connected to a resin recovery device, which includes a multi-stage filter. The multi-stage filter includes a primary filter and a secondary filter. A one-way valve is arranged between the primary filter and the secondary filter. The first outlet of the primary filter is connected to a resin recovery tank. The outlet of the secondary filter is connected to a water storage tank. The outlet pipe of the water storage tank is connected to a water inlet of a high-speed mixed ion exchanger.

[0008] A differential pressure transmitter is provided between the water inlet and outlet of the multi-stage filter.

[0009] The resin recovery tank is connected to the high-speed mixed ion exchanger through a jet conveyor pipeline.

[0010] A liquid level meter is arranged on the water storage tank, and a third valve, a fourth valve, a water pump and a one-way valve are arranged on the pipeline between the water outlet of the water storage tank and the water inlet of the high-speed mixed ion exchanger. The liquid level meter and the third valve, the fourth valve, the water pump and the one-way valve are all connected to the controller.

[0011] The water storage tank is connected to the multi-stage filter through a pipeline, a water pump, a one-way valve, a fifth valve and a sixth valve are arranged on the pipeline, and the multi-stage filter is connected to the sewage pipeline and the sewage valve.

[0012] Compared with the prior art, the present invention designs a new water cap structure and adds multi-angle flushing outlets, which can realize multi-angle lateral flushing of the water cap of the water distribution plate. The inverted water cap is driven to rotate by the action of water flow, so that the resin particles entering the top of the water distribution plate are not easy to clog the water cap; opening the multi-angle flushing outlet can discharge the water and resin particles in the high-speed mixed ion exchanger, effectively solving the problem of resin particles remaining above the water distribution plate in the high-speed mixed ion exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an existing high-speed mixed ion exchanger.

[0014] Figure 2 It is a structural schematic diagram of the high-speed mixed ion exchanger of the present invention.

[0015] Figure 3 It is a top view of the high-speed hybrid ion exchanger of the present invention.

[0016] Figure 4 It is a structural schematic diagram of a water cap in an existing high-speed mixed ion exchanger.

[0017] Figure 5 It is a schematic structural diagram of a water cap in the high-speed mixed ion exchanger of the present invention.

[0018] In the figure, 1-high-speed mixed ion exchanger, 11-water cap, 111-filter screen, 112-hollow screw, 113-first rotating surface, 114-second rotating surface, 115-connecting piece, 12-flushing outlet, 13-water distribution plate, 2-valve, 21-water inlet valve, 22-resin inlet valve, 23-resin outlet valve, 24-water outlet valve, 25-first valve, 26-second valve, 27-third valve, 28-fourth valve, 29-fifth valve, 210-sixth valve, 211-seventh valve, 212-eighth valve, 213-ninth valve, 214-drain valve, 215-tenth valve, 3-multi-stage filter, 31-primary filter, 32-secondary filter, 4-differential pressure transmitter, 5-resin recovery tank, 6-liquid level gauge, 7-water storage tank, 8-water pump, 9-flushing valve, 10-check valve, 14-injection conveyor. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0020] like Figure 2 As shown, an anti-clogging self-cleaning high-speed ion exchange device includes a high-speed mixed ion exchanger 1, a water inlet and a resin inlet are arranged at the top of the high-speed mixed ion exchanger 1, a water outlet and a resin outlet are arranged at the bottom, a water distribution plate is arranged at the upper end of the high-speed mixed ion exchanger 1, a water cap 11 is arranged on the water distribution plate, and the water cap includes a filter screen 111 and a hollow screw 112, as shown in FIG. Figure 5As shown, the filter screen 111 faces the top of the water distribution plate, the hollow screw 112 faces the bottom of the water distribution plate, the hollow screw 112 is fixedly connected to the water distribution plate, the filter screen is rotatably connected to the hollow screw, and flushing outlets 12 are evenly arranged on the side wall above the water distribution plate of the high-speed mixed ion exchanger 1. The flushing outlets 12 are intermittently opened during operation to allow the condensed water in the high-speed mixed ion exchanger to achieve cross-flow, flush the water cap and rotate the water cap.

[0021] The flushing outlets 12 are evenly arranged along the circumference of the high-speed mixed ion exchanger 1, and the number can be adjusted appropriately according to the system operation conditions. The more flushing outlets 12 there are, the greater the lateral impact on the water cap 11, the faster the water cap rotates, the less likely the resin particles are to clog the water cap, and the more condensed water is released from the flushing outlets 12, and the more resin particles are released. However, the condensed water released through the flushing outlets 12 needs to be returned to the high-speed mixed ion exchanger 1 for reprocessing, which may increase the overall time of fine processing, so the number of flushing outlets 12 should not be too many. Figure 3 As shown, except for the manhole, seven flushing outlets 12 are arranged along the circumferential direction, and the interval between two adjacent flushing outlets 12 is 45 degrees. Each flushing outlet 12 is provided with a corresponding valve 2, and the valve 2 is preferably a solenoid valve, which can be connected to a controller to realize automatic control of opening and closing.

[0022] The present invention designs a new rotatable water cap structure and adds multi-angle flushing water outlets, which can realize multi-angle lateral flushing of the water cap of the water distribution plate. The inverted water cap is driven to rotate by the action of water flow, so that resin particles entering above the water distribution plate are not easy to clog the water cap; opening the multi-angle flushing water outlet can discharge water and resin particles in the high-speed mixed ion exchanger, effectively solving the problem of resin particles remaining above the water distribution plate in the high-speed mixed ion exchanger.

[0023] The first rotating surface 113 is fixedly connected to the bottom of the filter 111, and the second rotating surface 114 is fixedly connected to the top of the hollow screw 112. The first rotating surface 113 and the second rotating surface 114 are connected at their peripheries by a connecting piece 115, and water holes connected to the hollow screw 112 are provided at the center. The first rotating surface 113 and the filter 111 can rotate under the action of water flow.

[0024] The flushing outlet is connected to a resin recovery device, which includes a multi-stage filter 3, which includes a primary filter 31 and a secondary filter 32. A one-way valve 10 is arranged between the primary filter 31 and the secondary filter 32. The first outlet of the primary filter 31 is connected to a resin recovery tank 5, and the outlet of the secondary filter 32 is connected to a water storage tank 7. The outlet of the water storage tank 7 is connected to a water inlet of a high-speed mixed ion exchanger 1.

[0025] Furthermore, a differential pressure transmitter 4 is provided between the water inlet and outlet of the multistage filter 3. The operator can monitor the differential pressure change between the water inlet and outlet of the multistage filter 3 to determine whether the filter screen of the multistage filter 3 is clogged with resin particles and whether the filter screen of the multistage filter 3 needs to be cleaned.

[0026] Furthermore, the resin recovery box 5 is connected to the high-speed mixed ion exchanger 1 through the jet conveyor 14 pipeline. The larger resin particles collected in the resin recovery box 5 can also be reused. When the resin regeneration of the mixed ion exchanger 1 is completed and re-transported back to the mixed ion exchanger 1, the larger resin particles collected in the resin recovery box 5 are re-entered into the mixed ion exchanger 1 through the resin inlet of the mixed ion exchanger 1 by using the regenerated water through the jet conveyor 14. This ensures the stability of the resin quantity in the high-speed mixed ion exchanger 1 and reduces the loss.

[0027] A liquid level gauge 6 is provided on the water storage tank 7, and a third valve 27, a fourth valve 28, a water pump 8 and a one-way valve 10 are provided on the pipeline between the water outlet of the water storage tank 7 and the water inlet of the high-speed mixed ion exchanger 1. The liquid level gauge 6 and the third valve 27, the fourth valve 28, the water pump 8 and the one-way valve 10 are all connected to the controller. The condensate water entering the water storage tank 7 through the flushing water outlet 12 and the multi-stage filter 3 gradually increases. When the liquid level value measured by the liquid level gauge 6 in the water storage tank 7 exceeds the set liquid level, the third valve 27, the fourth valve 28, the water pump 8 and the one-way valve 10 are opened to transport the condensate water to the water inlet of the high-speed mixed ion exchanger 1 and re-enter the condensate water treatment system, thereby ensuring the stability of the water volume of the condensate water system.

[0028] The water storage tank 7 is connected to the primary filter 31 and the secondary filter 32 of the multi-stage filter 3 through pipelines, and a water pump 8, a one-way valve 10, a fifth valve 29 and a sixth valve 210 are arranged on the pipeline. The seventh valve 211 and the seventh valve 212 are arranged near the water inlet ends of the primary filter 31 and the secondary filter 32, respectively. The secondary filter 32 is connected to the sewage pipe and the sewage valve 214. After the high-speed mixed ion exchanger 1 completes multiple automatic flushing, more broken resin particles will be intercepted by the two-stage filter screens of the primary filter 31 and the secondary filter 32, respectively, causing the inlet and outlet pressure difference of the filter 3 to increase. At this time, the water pump 8 is started to pass flushing water to the primary filter 31 and the secondary filter 32 from above the filter screen to flush the filter screen.

[0029] Working process: Operation: Before the condensate polishing system is started, the ion exchange resin has been loaded in the high-speed mixed ion exchanger 1. When the operation is started, the water inlet valve 21 and the water outlet valve 24 are opened, and the condensate enters the high-speed mixed ion exchanger 1 from the water inlet of the high-speed mixed ion exchanger 1, passes through the water cap on the upper layer of the water distribution plate, and the ions in the water exchange with the resin in the high-speed mixed ion exchanger, and then passes through the water cap on the lower layer of the water distribution plate and is discharged from the water outlet.

[0030] Resin failure: After the high-speed hybrid ion exchanger 1 processes a certain amount of condensate, the impurities adsorbed by the ion exchange resin are close to saturation, and regeneration is required to restore the original composition and performance. At this time, close the water outlet valve 24, open the resin outlet valve 23 at the bottom of the high-speed hybrid ion exchanger 1, use water to transport the resin to the regeneration system for resin regeneration, and after the resin transportation is completed, close the water inlet valve 21 and the resin outlet valve 23.

[0031] Regenerated resin filling: After the resin regeneration is completed, the resin inlet valve 22 is opened, and the regenerated resin enters from the resin inlet at the top of the high-speed mixed ion exchanger 1. When refilling the mixed ion exchanger 1, pressurized hydraulic transportation is adopted. At this time, the broken resin particles caused by the resin regeneration process will pass through the gaps on the water distribution plate, the water cap, etc. and enter the upper space of the water distribution plate. In this process, the water distribution plate and the water cap filter are deformed due to long-term use, resulting in larger gaps, so that part of the resin and the incompletely broken resin will also enter the upper part of the water distribution plate. When the regenerated resin is transported, the resin inlet valve 22 is closed. The water inlet valve 21 and the water outlet valve 24 are opened, and the high-speed mixed ion exchanger 1 is put into operation again.

[0032] Self-cleaning: The high-speed hybrid ion exchanger 1 that is put back into operation needs to be self-cleaned due to the resin particles in the upper space of the water distribution plate. On the one hand, the resin particles are prevented from adhering to the surface of the filter screen 111 of the water cap or clogging the filter screen 111 of the water cap. On the other hand, the resin particles in the upper space of the water distribution plate are discharged from the high-speed hybrid ion exchanger 1. At this time, the first valve 25 and the second valve 26 are opened, and one or more flushing valves 9 are intermittently opened to allow the condensed water to flow along the water distribution plate and laterally impact the resin particles in the upper space of the water distribution plate. Strong lateral flushing is adopted. At the same time, the water cap performs high-speed rotation under the impact of water. Under the impact of water flow and the centrifugal force of the high-speed rotation of the water cap, the resin particles above the water distribution plate and adhering to the filter screen of the water cap can be effectively separated and enter the multi-stage filter 3 together with the water. Under the interception of the two-stage filter screens in the multi-stage filter 3, the resin particles are respectively blocked in front of the two-stage filter screens in the filter, and the condensed water enters the water storage tank 7 through the flushing outlet 12.

[0033] When the liquid level gauge 6 in the water storage tank 7 reaches the set liquid level value, the third valve 27 and the fourth valve 28 are opened, and the water pump 8 is started to transport the condensate to the water inlet of the high-speed mixed ion exchanger 1 and re-enter the condensate treatment system to ensure the stability of the water volume in the condensate system.

[0034] Drainage: After the high-speed mixed ion exchanger 1 completes multiple self-cleanings, more resin particles will be intercepted by the two-stage filter screens of the multi-stage filter 3, causing the inlet and outlet pressure difference of the multi-stage filter 3 to increase. When the measured value of the pressure transmitter 4 is higher than the set pressure difference (such as 0.1MPA), the flushing valve 9, the first valve 25, and the second valve 26 are closed, and the fifth valve 29, the sixth valve 210, the seventh valve 211, the eighth valve 212, the ninth valve 213, and the drainage valve 214 are opened, and the water pump 8 is started to pass the flushing water from the filter screen of the multi-stage filter 3 to flush the filter screen. After the flushing water enters the primary filter 31 from the seventh valve 211, the resin intercepted by the first-stage filter screen is flushed into the resin recovery box 5; after the flushing water enters the secondary filter 32 from the eighth valve 212, due to the existence of the one-way valve 10, the flushing water flushes the resin particles intercepted on the second-stage filter screen and can be discharged to the wastewater system through the drainage valve 214. After the resin recovery and flushing is completed, the water pump 8, the fifth valve 29, the sixth valve 210, the seventh valve 211, the eighth valve 212, the ninth valve 213, and the sewage valve 214 are closed.

[0035] Resin recovery: The larger resin fragments collected in the resin recovery box 5 can also be reused. When the resin regeneration of the mixed ion exchanger 1 is completed and transported back to the mixed ion exchanger 1, the resin particles collected in the resin recovery box 5 are re-entered into the mixed ion exchanger 1 through the resin inlet of the mixed ion exchanger 1 by using the regenerated water through the jet conveyor 14. This ensures the stability of the resin quantity in the high-speed mixed ion exchanger 1 and reduces the loss.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-clogging self-cleaning high-speed ion exchange device, comprising a high-speed mixed ion exchanger (1), wherein the high-speed mixed ion exchanger (1) is provided with a water inlet and a resin inlet at the top, a water outlet and a resin outlet at the bottom, and a water distribution plate is provided at the upper end of the high-speed mixed ion exchanger (1), characterized in that: A water cap (11) is arranged on the water distribution plate, and the water cap comprises a filter screen (111) and a hollow screw (112). The filter screen (111) faces the top of the water distribution plate, and the hollow screw (112) faces the bottom of the water distribution plate. The hollow screw (112) is fixedly connected to the water distribution plate, and the filter screen is rotatably connected to the hollow screw. Flushing outlets (12) are evenly arranged on the side wall above the water distribution plate of the high-speed mixed ion exchanger (1). During operation, the flushing outlets (12) are opened to allow water in the high-speed mixed ion exchanger to flow in a cross direction, flush the water cap, and rotate the water cap.

2. The anti-clogging self-cleaning high-speed ion exchange device according to claim 1, characterized in that: The filter screen (111) is fixedly connected to a first rotating surface (113) at the bottom, and the hollow screw (112) is fixedly connected to a second rotating surface (114) at the top. The first rotating surface (113) and the second rotating surface (114) are connected at their peripheries via a connecting piece (115), and a water hole communicating with the hollow screw (112) is disposed at the center. The first rotating surface (113) and the filter screen (111) are rotatable under the action of water flow.

3. The anti-clogging self-cleaning high-speed ion exchange device according to claim 1 is characterized in that: The flushing water outlet is connected to a resin recovery device, wherein the resin recovery device comprises a multi-stage filter (3), the multi-stage filter (3) comprises a primary filter (31) and a secondary filter (32), a one-way valve (10) is arranged between the primary filter (31) and the secondary filter (32), a first outlet of the primary filter (31) is connected to a resin recovery tank (5), a water outlet of the secondary filter (32) is connected to a water storage tank (7), and a water outlet pipe of the water storage tank (7) is connected to a water inlet of a high-speed mixed ion exchanger (1).

4. The anti-clogging self-cleaning high-speed ion exchange device according to claim 3 is characterized in that: A differential pressure transmitter (4) is provided between the water inlet and outlet of the multi-stage filter (3).

5. The anti-clogging self-cleaning high-speed ion exchange device according to claim 3 is characterized in that: The resin recovery tank (5) is connected to the high-speed mixed ion exchanger (1) through a jet conveyor (14) pipeline.

6. The anti-clogging self-cleaning high-speed ion exchange device according to claim 3, characterized in that: A liquid level meter (6) is provided on the water storage tank (7); a third valve (27), a fourth valve (28), a water pump (8) and a one-way valve (10) are provided on a pipeline between a water outlet of the water storage tank (7) and a water inlet of the high-speed mixed ion exchanger (1); and the liquid level meter (6) and the third valve (27), the fourth valve (28), the water pump (8) and the one-way valve (10) are all connected to a controller.

7. The anti-clogging self-cleaning high-speed ion exchange device according to claim 3 is characterized in that: The water storage tank (7) is connected to the multi-stage filter (3) via a pipeline, a water pump (8), a one-way valve (10), a fifth valve (29) and a sixth valve (210) are arranged on the pipeline, and the multi-stage filter (3) is connected to a sewage pipeline and a sewage valve (214).

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