Resin leakage prevention system for mixed bed exhaust pipe and mixed bed full-water starting method

Abstract

The invention discloses a mixed bed exhaust pipe resin leakage prevention system and a mixed bed full water starting method.The mixed bed exhaust pipe resin leakage prevention system comprises a mixed bed, a mixed bed water inlet pipeline and a flushing water pipeline are arranged on the mixed bed, and the end, close to the mixed bed, of the mixed bed water inlet pipeline is connected to an exhaust mother pipe through a branch pipe; a liquid level sensor is arranged at one end of the exhaust mother pipe, a flange end is arranged at the other end of the exhaust mother pipe, and a partition plate buffer tank is arranged on the exhaust mother pipe and connected to a trench through a drainage pipe; the system further comprises a controller, the controller is electrically connected with the liquid level sensor, and a flushing valve on the flushing water pipeline, a main water inlet valve of the mixed bed water inlet pipeline and an exhaust valve on the branch pipe are electrically connected with the controller. According to the system, the resin can be effectively prevented from being flushed out in the exhaust and drainage process, the waste of the resin is avoided, the cleaning work of the hazardous waste resin in the trench is relieved, and the exhaust mother pipe cannot be blocked.

Description

Technical Field

[0001] The invention relates to the technical field of condensate polishing of generator sets, and in particular to a mixed bed exhaust pipe resin leakage prevention system and a mixed bed full water starting method. Background Art

[0002] Subcritical and above high-parameter generators often need to further desalinate the condensate to ensure better steam and water quality. Medium-pressure high-speed mixed bed has become a commonly used solution for condensate polishing. The mixed bed is a desalination device that mixes anion and cation exchange resins in a tank in a certain proportion. Anion and cation exchange resins are spherical gel particles with a density of 1.0-1.3g / ml and a particle size of 0.4-0.9mm. After contacting water, they can replace impurity ions in the water to achieve deep desalination. The resin becomes invalid after reaching the exchange cycle, and the resin needs to be removed from the mixed bed. The bed output is regenerated in vitro with a regeneration agent. After the regeneration is completed and the flushing is qualified, the resin is input into the mixed bed through air flow and water flow for standby. The regeneration and commissioning of the mixed bed are realized by distributed automatic sequential control programs. In order to prevent air from entering the condensate system, the mixed bed must be filled with water before starting. The mixed bed full water program mostly adopts a fixed time (about 120s) control method. During this process, a large amount of resin will flow out of the exhaust pipe. If a filter is added to the exhaust pipe, the resin will cause the exhaust pipe to be blocked. If the mesh size of the water distributor of the mixed bed inlet pipe is changed, the operating pressure difference of the mixed bed will increase, which is not worth the loss. Summary of the invention

[0003] The purpose of the present invention is to provide a mixed bed exhaust pipe anti-resin leakage system and a mixed bed full water starting method to address the problems existing in the prior art, so as to ensure that the mixed bed exhaust pipe can be smoothly vented without blockage during the tank full water control operation under the conditions of flushing water pressure fluctuations and high height of the resin layer in the mixed bed, and no resin is flushed out.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A mixed bed exhaust pipe resin leakage prevention system, comprising a mixed bed, wherein a mixed bed water inlet pipe and a flushing water pipe are arranged on the mixed bed, wherein one end of the mixed bed water inlet pipe close to the mixed bed is connected to an exhaust main pipe through a branch pipe, one end of the exhaust main pipe is provided with a liquid level sensor, and the other end is provided with a flange end, a baffle buffer tank is arranged on the exhaust main pipe, and the baffle buffer tank is connected to a ditch through a drainage pipe; It also includes a controller, which is electrically connected to the liquid level sensor. The flushing valve on the flushing water pipeline, the main water inlet valve on the mixed bed water inlet pipeline and the exhaust valve on the branch pipe are also electrically connected to the controller respectively.

[0005] This mixed bed exhaust pipe resin leakage prevention system can effectively discharge the gas in the mixed bed during the restart process after the mixed bed resin is replaced, preventing the gas from entering the condensate water system, and can effectively prevent the resin from being flushed out during the exhaust and drainage process, so as to avoid resin waste and reduce the cleaning work of hazardous waste resin in the ditch; compared with the filter-type resin blocking system, this system will not cause blockage of the exhaust main pipe while preventing resin leakage.

[0006] The baffle buffer tank is arranged above the exhaust main pipe, so as to prevent the resin flushed out of the mixed bed from being blocked in the exhaust main pipe after being blocked, and no resin will be blocked in the branch pipe or the mixed bed water inlet pipe; the resin buffered in the baffle buffer tank can be returned to the mixed bed again in the subsequent pressure relief operation, which greatly reduces the waste of resin and the difficulty of cleaning the resin.

[0007] Furthermore, the exhaust main pipe is arranged horizontally, and the vertical height of the exhaust main pipe is higher than the mixed bed and the mixed bed water inlet pipe, so as to effectively ensure that the mixed bed is full of water.

[0008] Furthermore, the exhaust main pipe is also connected to a plurality of spare mixed beds through branch pipes, and the spare mixed beds are arranged in parallel with the mixed bed and one of them is used selectively.

[0009] Furthermore, the partition buffer tank is arranged vertically, with the inlet located at the bottom, and the drain pipe is connected to the top of the partition buffer tank; a first partition assembly and a second partition assembly located above the first partition assembly are provided in the partition buffer tank, and the first partition assembly and the second partition assembly are used to block the resin and drain and exhaust water.

[0010] Furthermore, the first baffle assembly includes a plurality of layers of conical baffles or inclined baffles arranged in the baffle buffer tank, a first accommodating cavity is provided between the plurality of layers of the conical baffles, and a first overflow hole is provided at the lowest point in the middle of the plurality of layers of the conical baffles, and the aperture of the first overflow hole is many times the particle size of the resin.

[0011] The setting of the first overflow hole can allow the water to overflow upward. During this process, due to the presence of the conical partition or the inclined partition, a part of the resin will be blocked, that is, the resin will be retained in the first accommodating cavity below the conical partition or the inclined partition; the multi-layer arrangement has a progressive effect, which can gradually reduce the content of resin in the water flow and gradually retain the resin.

[0012] Furthermore, the plurality of first overflow holes are arranged with equal diameters, or are arranged to be gradually smaller from the lower layer to the upper layer; the conical partition is also provided with a plurality of water-permeable and air-permeable holes, and the aperture of the water-permeable and air-permeable holes does not exceed 0.2 mm to ensure that the resin does not pass through.

[0013] Furthermore, a plurality of metal wires are arranged in the conical partition along the busbar direction, and the metal wires are connected to an external electromagnetic device or an electrostatic device.

[0014] Furthermore, the second partition assembly includes a plurality of layers of curved partitions arranged in the partition buffer tank, the curved partitions are all bent downward, second accommodating cavities are provided between the plurality of layers of the curved partitions, second overflow holes are respectively provided at the lowest points of the curved partitions, and the second overflow holes of the upper and lower layers are staggered in space.

[0015] The arrangement of the curved partition is similar to that of the conical partition, but the multi-layer curved partition has its lowest point arranged at an eccentric position. Such an arrangement can form a maze-like structure, making it easier for the resin to remain in the telescopic second accommodating cavity formed by the curved partition.

[0016] Furthermore, a vertical guide rod is provided inside the partition buffer tank, and the vertical guide rod is arranged on the central axis of the partition buffer tank. A plurality of interference wires are arranged at intervals on the outer periphery of the vertical guide rod. A motor connected to and driving the vertical guide rod is also provided outside the partition buffer tank.

[0017] A mixed bed full water starting method for a mixed bed exhaust pipe resin leakage prevention system, wherein after replacing the failed resin in the mixed bed with effective resin, the mixed bed is filled with water and then started, and specifically comprises the following steps: Close the main water inlet valve of the mixed bed water inlet pipeline, and open the flushing valve on the flushing water pipeline and the exhaust valve on the branch pipe; The flushing water pipeline injects water into the mixed bed, and the water pressure is controlled at 0.2-0.5MPa; When the liquid level sensor detects a water flow signal and sends the water flow signal to the controller, the controller determines that the mixed bed is full of water and issues an instruction to close the flush valve, and the flush valve is closed; The excess water carries the resin and flows into the baffle buffer tank, where the resin is blocked in the baffle buffer tank, and the excess water is discharged to the ditch through the drainage pipe; When the mixed bed is depressurized, the resin in the baffle buffer tank flows back to the mixed bed along with the water flow, the liquid level sensor is reset, and the exhaust valve is closed.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. During the restarting process after the mixed bed resin is replaced, the resin leakage prevention system of the mixed bed exhaust pipe can effectively discharge the gas in the mixed bed to prevent the gas from entering the condensate water system, and can effectively prevent the resin from being flushed out during the exhaust and drainage process to avoid the waste of resin and reduce the cleaning work of hazardous waste resin in the ditch; compared with the filter-type resin blocking system, the present system can prevent resin leakage without causing blockage of the exhaust main pipe; 2. By arranging the baffle buffer tank and the liquid level sensor on the exhaust main pipe, it can sense the water flow. When it senses the water flow, it can judge and give a signal that the mixed bed is full of water, and can buffer and store the resin flushed out of the mixed bed after the liquid level sensor senses the action and before the flushing water pipeline stops acting, and prevent the resin from being flushed out of the drain pipe or entering the ditch; 3. The baffle buffer tank is set The position is above the exhaust main pipe, so that the resin flushed out of the mixed bed can be prevented from being blocked in the exhaust main pipe after being blocked, and there will be no resin blocking in the branch pipe or the mixed bed water inlet pipe; the resin buffered in the baffle buffer tank can be returned to the mixed bed again in the subsequent pressure relief operation, which greatly reduces the waste of resin and the difficulty of cleaning the resin; 4. The setting of the overflow hole can allow the water flow to overflow upward. In this process, part of the resin will be blocked due to the presence of the baffle, that is, the resin will be retained in the first accommodating chamber under the conical baffle or the inclined baffle; the multi-layer arrangement has a progressive effect, which can gradually reduce the content of resin in the water flow and gradually retain the resin; 5. The multi-layer curved baffle sets its lowest point at an eccentric position. Such a setting can form a maze-like structure, making it easier for the resin to remain in the telescopic second accommodating chamber formed by the curved baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of a mixed bed exhaust pipe resin leakage prevention system of the present invention; Figure 2 A schematic diagram of the internal structure of a partition buffer tank of the present invention; Figure 3 It is a schematic structural diagram of the conical partition of the present invention; Figure 4 It is a structural schematic diagram of another conical partition of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of another conical partition of the present invention; Figure 6 It is a schematic structural diagram of another conical partition of the present invention; Figure 7 It is a schematic diagram of the structure of the curved baffle of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the curved partition of the present invention; Fig. 9It is a structural schematic diagram of another partition buffer tank of the present invention; In the figure: 1. mixed bed; 2. spare mixed bed; 3. mixed bed water inlet pipe; 4. flushing water pipe; 5. flushing valve; 6. branch pipe; 7. exhaust valve; 8. exhaust main pipe; 9. liquid level sensor; 10. flange end; 11. partition buffer tank; 12. drain pipe; 13. ditch; 14. first partition assembly; 1401. conical partition; 1402. first overflow hole; 1403. first water-permeable and air-permeable hole; 15. second partition assembly; 1501. curved partition; 1502. second overflow hole; 1503. second water-permeable and air-permeable hole; 16. metal wire; 17. vertical guide rod; 18. interference wire; 19. motor. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] like Figure 1 As shown, a mixed bed exhaust pipe resin leakage prevention system comprises a mixed bed 1, on which a mixed bed water inlet pipe 3 and a flushing water pipe 4 are provided, one end of the mixed bed water inlet pipe 3 close to the mixed bed 1 is connected to an exhaust main pipe 8 through a branch pipe 6, one end of the exhaust main pipe 8 is provided with a liquid level sensor 9, and the other end is provided with a flange end 10, and a partition buffer tank 11 is provided on the exhaust main pipe 8, and the partition buffer tank 11 is connected to a ditch 13 through a drain pipe 12; It also includes a controller, which is electrically connected to the liquid level sensor 9. The flushing valve 5 on the flushing water pipeline 4, the main water inlet valve of the mixed bed water inlet pipeline 3 and the exhaust valve 7 on the branch pipe 6 are also electrically connected to the controller respectively.

[0023] This mixed bed exhaust pipe resin leakage prevention system can effectively discharge the gas in the mixed bed during the restart process after the mixed bed resin is replaced, preventing the gas from entering the condensate water system, and can effectively prevent the resin from being flushed out during the exhaust and drainage process, so as to avoid resin waste and reduce the cleaning work of hazardous waste resin in the ditch; compared with the filter-type resin blocking system, this system will not cause blockage of the exhaust main pipe while preventing resin leakage.

[0024] By arranging the partition buffer tank 11 on the exhaust main pipe 8, the resin flushed out of the mixed bed after the liquid level sensor is sensed and before the flushing water pipeline (connected with a flushing water pump) stops working can be buffered and stored, and the resin can be prevented from being flushed out of the drain pipe or into the ditch.

[0025] The baffle buffer tank 11 is arranged above the exhaust main pipe 8, so as to prevent the resin flushed out of the mixed bed from being blocked in the exhaust main pipe after being blocked, and no resin will be blocked in the branch pipe or the mixed bed water inlet pipe; the resin buffered in the baffle buffer tank can be returned to the mixed bed again in the subsequent pressure relief operation, which greatly reduces the waste of resin and the difficulty of cleaning the resin.

[0026] The liquid level sensor 9 is provided at one end of the exhaust main pipe 8, which can sense water flow. When it senses water flow, it can judge and give a signal that the mixed bed is full of water, and can feed back these signals to the controller. The controller can then give an instruction to stop the injection of water into the flushing water pipeline. Such operation is to avoid excessive flushing of resin on the one hand, and to save desalted water and reduce waste on the other hand.

[0027] The other end of the exhaust main pipe 8 is provided with a flange end 10, which can be further connected to pipelines according to actual needs, so that multiple mixed beds can be connected in parallel on the same exhaust main pipe to facilitate exhaust and water filling control.

[0028] Furthermore, the exhaust main pipe 8 is arranged horizontally, and the vertical height of the exhaust main pipe 8 is higher than the height of the mixed bed 1 and the mixed bed water inlet pipe 3 .

[0029] Such a setting can make the elevation of the exhaust main pipe 8 higher than that of the mixed bed. If the liquid level sensor 9 in the exhaust main pipe 8 detects water flow, it can be 100% confirmed that the mixed bed 1 is full of water, and the water discharges the residual air in the mixed bed 1 and the pipeline to the exhaust main pipe 8, and then can enter the partition buffer tank 11. The horizontal setting can ensure that multiple mixed beds arranged in parallel can share a set of the exhaust main pipe and liquid level sensor.

[0030] Furthermore, the exhaust main pipe 8 is also connected to a plurality of spare mixed beds 2 through branch pipes. The spare mixed beds 2 are arranged in parallel with the mixed bed 1 and one of them is used selectively.

[0031] The spare mixed bed is basically the same as the mixed bed. Its existence has many functions. First, when the generator set produces a lot of condensate, the spare mixed bed can also participate in the desalination treatment of the condensate; second, under normal circumstances, when a mixed bed replaces the failed resin, the spare mixed bed can be used as a substitute; third, the spare mixed bed can take over the resin refluxed in the partition buffer tank when the water pressure is released.

[0032] Furthermore, the partition buffer tank 11 is arranged vertically, with the inlet located at the bottom, and the drain pipe 12 is connected to the top of the partition buffer tank 11; such an arrangement can ensure that the water flow entrains the resin and gas to escape upward, and the gas and water can be discharged from the drain pipe 12 above while the resin remains in the partition buffer tank 11.

[0033] like Figure 2 As shown, the baffle buffer tank 11 is provided with a first baffle assembly 14 and a second baffle assembly 15 located above the first baffle assembly 14 . The first baffle assembly 14 and the second baffle assembly 15 are used to block the resin and drain and exhaust gas.

[0034] The first baffle assembly 14 and the second baffle assembly 15 can be used independently or simultaneously. The best effect is achieved when both are used simultaneously, and the resin in the water flow can be basically retained in the tank while gas and excess water are smoothly discharged.

[0035] In some embodiments, the first baffle assembly 14 includes a plurality of conical baffles 1401 or inclined baffles arranged in the baffle buffer tank 11, a first accommodating cavity is provided between the plurality of conical baffles 1401, and a first overflow hole 1402 is provided at the lowest point in the middle of the plurality of conical baffles, and the aperture of the first overflow hole 1402 is many times the particle size of the resin.

[0036] The small end of the conical partition 1401 faces downward, and the inclined partition is inclined downward; the setting of the first overflow hole 1402 can allow the water to overflow upward. In this process, due to the existence of the conical partition or the inclined partition, a part of the resin will be blocked, that is, the resin will be retained in the first accommodating cavity below the conical partition or the inclined partition; the multi-layer arrangement has a progressive effect, which can gradually reduce the content of resin in the water flow and gradually retain the resin.

[0037] Since the resin in the mixed bed is an anion and cation exchange resin, and its density is equivalent to that of water, or slightly heavier than water, it can float in the water or be under the water surface under the action of the water flow. This provides the conditions for the conical baffles or inclined baffles to block the resin, that is, when the water overflows, the resin floating in it will hit the baffle and be blocked.

[0038] The diameter of the first overflow hole 1402 is much larger than the diameter of the resin, so that water can overflow smoothly without the resin blocking the first overflow hole.

[0039] Furthermore, the plurality of first overflow holes 1402 are arranged with equal diameters, or are arranged to be gradually smaller from the lower layer to the upper layer, and such an arrangement has a more gradient.

[0040] In some embodiments, in combination Figure 3 As shown, the conical partition 1401 is also provided with a plurality of first water-permeable and air-permeable holes 1403, and the aperture of the first water-permeable and air-permeable holes 1403 does not exceed 0.2 mm. Generally, the particle size of the resin in the mixed bed is 0.4 mm-0.9 mm, and the arrangement of these water-permeable and air-permeable holes allows water and air to escape upward without allowing the resin to pass through, and the resin will gradually be cached in the first accommodating cavity.

[0041] In some embodiments, Figure 4 and 5 As shown, a plurality of metal wires 16 are provided in the conical partition 1401 along the busbar direction, and the metal wires 16 are connected to an external electromagnetic device or an electrostatic device.

[0042] The metal wire 16 can generate a local magnetic field or electrostatic field by connecting to an external electromagnetic device or electrostatic device. The appearance of such a magnetic field or electrostatic field has a certain adsorption effect, which can guide the resin to approach the conical partition or adsorb the resin, which is conducive to the conical partition blocking the trapped resin and allowing the resin to gather under the first partition. The metal wire can be selected from a corresponding material or model as needed, and the metal wires will be connected together and led out from the partition buffer tank.

[0043] In actual use, the first water-permeable and air-permeable holes 1403 and the metal wire 16 can be arranged independently or used in combination. When used in combination, the positions of the two arrangements need to be staggered appropriately, such as Figure 6 shown.

[0044] In some embodiments, in combination Figure 7 and 8 As shown, the second baffle assembly 15 includes a plurality of layers of curved baffles 1501 arranged in the baffle buffer tank 11, and the curved baffles 1501 are all bent downward, and a second accommodating cavity is provided between the plurality of layers of the curved baffles 1501, and a second overflow hole 1502 is respectively provided at the lowest point of the curved baffle 1501, and the second overflow holes 1502 of the upper and lower layers are staggered in space.

[0045] The arrangement of the curved baffle 1501 is similar to that of the conical baffle, but the lowest points of the multiple curved baffles 1501 are arranged at different positions, that is, eccentrically arranged, so that a maze-like structure can be formed, making it easier for the resin to stay in the second accommodation cavity formed by the curved baffle. When the water flows over, each time it passes through a layer of the curved baffle, the second overflow holes are arranged eccentrically and not overlapped, making it easier for the resin to collide with the bottom of the curved baffle and be blocked.

[0046] The curved partition 1501 may be a smooth curved surface, and may also be provided with some second water-permeable and air-permeable holes 1503. The aperture of the second overflow hole on the curved partition 1501 may be smaller than the aperture of the first overflow hole, but still larger than the diameter of the resin particles. Some chamfers and guide structures may also be provided at the upper and lower ports of the second overflow hole and the first overflow hole.

[0047] The arrangement of the first baffle assembly 14 and the second baffle assembly 15 can effectively block the resin when the water overflows and prevent the resin from being washed out. In the subsequent process, the resin in the baffle buffer tank 11 can also flow back normally. The baffle assembly will not hinder the flow back, and the resin will move along the baffle toward the overflow hole and gradually flow back into the mixed bed. If the metal wire is provided, the metal wire can be closed at this time.

[0048] In other embodiments, Fig. 9 As shown, a vertical guide rod 17 is further provided inside the partition buffer tank 11, and the vertical guide rod 17 is arranged on the central axis of the partition buffer tank 11. A plurality of interference wires 18 are arranged at intervals on the periphery of the vertical guide rod 17, and a motor 19 connected to and driving the vertical guide rod is further provided outside the partition buffer tank 11. The interference wires 18 of each layer are respectively located below the first overflow hole 1402 of each layer, and the radius of the interference wire 18 is not less than the radius of the first overflow hole 1402.

[0049] The vertical guide rod 17 can pass through the first overflow hole 1402 upward from the middle. The interference wire 18 can interfere with the resin and make the resin flow to both sides when the water overflows through the first overflow hole 1402, thereby reducing the chance of the resin moving upward from the first overflow hole. The motor 19 can drive the vertical guide rod to rotate, thereby driving the interference wire 18 to swing and play an interference role. It does not necessarily rotate continuously, but swings back and forth. The motor 19 can be installed below the exhaust main pipe 8, and the vertical guide rod 17 extends downward to connect with the output end of the motor 19. Sealed bearings and seals can be set at the place where the pipe is passed to prevent water and air leakage. During the resin reflux process, the motor will stop working to avoid affecting the resin reflux.

[0050] A mixed bed full water starting method for a mixed bed exhaust pipe resin leakage prevention system, wherein after replacing the failed resin in the mixed bed with effective resin, the mixed bed is filled with water and then started, and specifically comprises the following steps: Close the main water inlet valve of the mixed bed water inlet pipeline, and open the flushing valve on the flushing water pipeline and the exhaust valve on the branch pipe; The flushing water pipeline injects water into the mixed bed, the water pressure is controlled at 0.2-0.5Mpa, the diameter of the flushing water pipeline is about 65mm, and the flow rate is 12-20t / h; When the liquid level sensor detects a water flow signal and sends the water flow signal to the controller, the controller determines that the mixed bed is full of water and issues an instruction to close the flush valve, and the flush valve is closed; During this process, part of the water has entered the branch pipe and exhaust main pipe. In addition, the flushing water pump is interlocked and stopped, and the exhaust valve and flushing valve are interlocked and closed. The action time is about 1 second, and about 3 to 5 liters of water and resin mixture will continue to enter the partition buffer tank with the inertia of the water flow. The excess water carries the resin and enters the baffle buffer tank along with the water flow, where the resin is blocked in the baffle buffer tank, and a small amount of water is discharged to the ditch through the drain pipe. During the process of injecting water into the mixed bed, the residual air in the mixed bed, i.e., the pipeline, will be squeezed and discharged upward to the baffle buffer tank and the drain pipe, and finally discharged.

[0051] In some embodiments, when the standby mixed bed is depressurized, the top exhaust valve and the recirculation valve on the outlet side are opened, the recirculation drain valve is opened, and the resin in the baffle buffer tank flows back to the mixed bed with the water flow, the liquid level sensor is reset, and the exhaust valve is closed. For example, after the water pressure is released for 60 to 120 seconds, the water pressure in the standby mixed bed gradually drops from 2MPa (about 20 kg) to below 0.1MPa. As the water pressure drops, the resin in the baffle buffer tank can flow back to the tank, which avoids the waste of effective resin and does not require manual cleaning of the baffle buffer tank.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed bed exhaust pipe resin leakage prevention system, characterized in that: It comprises a mixed bed, on which a mixed bed water inlet pipe and a flushing water pipe are arranged, one end of the mixed bed water inlet pipe close to the mixed bed is connected to an exhaust main pipe through a branch pipe, one end of the exhaust main pipe is provided with a liquid level sensor, and the other end is provided with a flange end, a baffle buffer tank is arranged on the exhaust main pipe, and the baffle buffer tank is connected to a ditch through a drainage pipe; It also includes a controller, which is electrically connected to the liquid level sensor. The flushing valve on the flushing water pipeline, the main water inlet valve on the mixed bed water inlet pipeline and the exhaust valve on the branch pipe are also electrically connected to the controller respectively.

2. The mixed bed exhaust pipe resin leakage prevention system according to claim 1, characterized in that: The exhaust main pipe is arranged horizontally, and the vertical height of the exhaust main pipe is higher than the mixed bed and the mixed bed water inlet pipe.

3. The mixed bed exhaust pipe resin leakage prevention system according to claim 1, characterized in that: The exhaust main pipe is also connected to a plurality of spare mixed beds through branch pipes. The spare mixed beds are arranged in parallel with the mixed beds and one of them is used selectively.

4. The mixed bed exhaust pipe resin leakage prevention system according to claim 1, characterized in that: The partition buffer tank is arranged vertically, with the inlet located at the bottom, and the drain pipe is connected to the top of the partition buffer tank; a first partition assembly and a second partition assembly located above the first partition assembly are provided in the partition buffer tank, and the first partition assembly and the second partition assembly are used to block the resin and drain and exhaust gas.

5. The mixed bed exhaust pipe resin leakage prevention system according to claim 4, characterized in that: The first baffle assembly includes a plurality of conical baffles or inclined baffles arranged in the baffle buffer tank, a first accommodating cavity is provided between the plurality of conical baffles, and a first overflow hole is provided at the lowest point in the middle of the plurality of conical baffles, wherein the aperture of the first overflow hole is several times the particle size of the resin.

6. The mixed bed exhaust pipe resin leakage prevention system according to claim 5, characterized in that: The plurality of first overflow holes are arranged with equal diameters, or are arranged with gradually smaller diameters from the lower layer to the upper layer; the conical partition is also provided with a plurality of water-permeable and air-permeable holes, and the apertures of the water-permeable and air-permeable holes do not exceed 0.2 mm.

7. The mixed bed exhaust pipe resin leakage prevention system according to claim 5, characterized in that: A plurality of metal wires are arranged in the conical partition along the busbar direction, and the metal wires are connected to an external electromagnetic device or an electrostatic device.

8. The mixed bed exhaust pipe resin leakage prevention system according to claim 4, characterized in that: The second partition assembly includes a plurality of layers of curved partitions arranged in the partition buffer tank, the curved partitions are all bent downward, a second accommodating cavity is provided between the plurality of layers of the curved partitions, a second overflow hole is provided at the lowest point of the curved partition, and the second overflow holes of the upper and lower layers are staggered in space.

9. The mixed bed exhaust pipe resin leakage prevention system according to claim 1, characterized in that: A vertical guide rod is also provided inside the partition buffer tank, and the vertical guide rod is arranged on the central axis of the partition buffer tank. A plurality of interference wires are arranged at intervals on the outer periphery of the vertical guide rod. A motor connected to and driving the vertical guide rod is also provided outside the partition buffer tank.

10. A mixed bed full water starting method having the mixed bed exhaust pipe resin leakage prevention system according to any one of claims 1 to 9, characterized in that: After replacing the failed resin in the mixed bed with effective resin, the mixed bed is filled with water and then started up, including the following steps: Close the main water inlet valve of the mixed bed water inlet pipeline, and open the flushing valve on the flushing water pipeline and the exhaust valve on the branch pipe; The flushing water pipeline injects water into the mixed bed, and the water pressure is controlled at 0.2-0.5 MPa; When the liquid level sensor detects a water flow signal and sends the water flow signal to the controller, the controller determines that the mixed bed is full of water and issues an instruction to close the flush valve, and the flush valve is closed; The excess water carries the resin and flows into the baffle buffer tank, where the resin is blocked in the baffle buffer tank, and the excess water is discharged to the ditch through the drainage pipe; When the mixed bed is depressurized, the resin in the baffle buffer tank flows back to the mixed bed along with the water flow, the liquid level sensor is reset, and the exhaust valve is closed.

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