Flue gas purification device and method for thermal power plant

Abstract

The invention discloses a thermal power plant flue gas purification device and method.The thermal power plant flue gas purification device comprises a combined installation cylinder, a threshold value capturing and guiding-out mechanism and a sequence processing mechanism matched with the threshold value capturing and guiding-out mechanism, a positioning installation sleeve is arranged at one end of the combined installation cylinder, and a positioning installation cylinder is arranged at the other end of the combined installation cylinder; rapid combination and installation can be achieved according to different purification requirements, multi-level purification operation is achieved, and transportation convenience and maintainability are better achieved; the device can synchronously achieve liquefaction and improve the fine particulate matter capturing effect, automatically and periodically clean and treat captured matter through a threshold mechanism, and meanwhile, through cooperation with passive centrifugal oscillation stripping, the matter capturing capacity of the device is stably kept for a long time, so that the efficiency of the device is improved, and the service life of the device is prolonged. The particle adsorption effect can be improved through heat absorbed through condensation, meanwhile, the acid-alkali washing structure is optimized, and the purification level of the device is further improved.

Description

Technical Field

[0001] The invention relates to the field of flue gas purification, and in particular to a flue gas purification device and method for a thermal power plant. Background Art

[0002] View Technology

[0003] As the public's attention to environmental quality continues to increase, the demand for blue skies, white clouds and fresh air is becoming increasingly strong. As one of the main sources of atmospheric pollutants, the flue gas purification effect of thermal power plants is directly related to the environmental quality of the surrounding areas and the quality of life of residents. Therefore, the research and development of new and more efficient flue gas purification devices and methods for thermal power plants has important social significance.

[0004] Although the current flue gas purification devices in thermal power plants are capable of purifying flue gas, they have many defects. They often adopt an integrated structure that is difficult to transport and maintain. In addition, the current equipment adopts a fixed filtering structure. Although some equipment can self-clean, it often relies on electronic control. The stability of electronic components is poor at high temperatures, and the sustainability of self-cleaning is obviously insufficient, making it difficult to effectively capture fine particles. The vast majority of existing equipment cannot utilize the energy of thermal power flue gas for further flue gas treatment.

[0005] The present invention aims to solve the technical problems existing in the prior art, and for this purpose, proposes a flue gas purification device and method for a thermal power plant. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a flue gas purification device and method for a thermal power plant.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A flue gas purification device for a thermal power plant comprises a combined installation tube, one end of the combined installation tube is provided with a positioning installation sleeve, the other end of the combined installation tube is provided with a positioning installation tube, the positioning installation tube is nested with the positioning installation sleeve, the bottom of the positioning installation sleeve is provided with a sealing ring in cooperation with the positioning installation tube, a plurality of positioning installation holes are provided at equal angles on the positioning installation sleeve and the positioning installation tube, and further comprises: a threshold capture and derivation mechanism, including a threshold capture module and a passive flow guide module;

[0009] The threshold capture module includes a fixed installation cylinder, which is connected to the inner wall of the combined installation cylinder, a conical guide cylinder is arranged at one end of the fixed installation cylinder, a plurality of guide installation holes are arranged at equal angles on the cylinder wall of the conical guide cylinder, a swing installation frame is arranged inside the guide installation hole, a filter plate is arranged on the inner side of the swing installation frame, one end of the swing installation frame is rotatably installed at one end of the guide installation hole through a rotation limit shaft, a vibration fork is arranged at the other end of the swing installation frame, and the rotation limit shaft limits the rotation when the swing installation frame and the guide installation hole coincide with each other;

[0010] The passive flow guide module comprises a flow guide installation cylinder, one end of which is connected to the end of the conical flow guide cylinder, the other end of which is connected to a direction-changing bend cylinder, which extends out of the combined installation cylinder, and a slow-flow cylinder is provided at the outer end of the direction-changing bend cylinder, which extends out to form an output conduit;

[0011] A limited position rotating shaft is arranged inside the guide installation cylinder, and a limited position bearing sleeve is arranged to cooperate with the limited position rotating shaft;

[0012] A plurality of passive guide vanes are arranged at equal angles on the limiting rotating shaft on one side of the limiting bearing sleeve, a strip elastic member is arranged on the limiting rotating shaft on the other side of the limiting bearing sleeve, a counterweight collision bead is arranged on the outer end of the strip elastic member, and the strip elastic member in a rotating state together with the counterweight collision bead can collide with the vibration fork;

[0013] A sequence processing mechanism is provided in a matching threshold capture and export mechanism, the sequence processing mechanism comprising a particle settling installation cylinder provided on the outer wall of the combined installation cylinder, and a combined acid-base treatment cylinder is provided on the outer wall of the combined installation cylinder on one side of the particle settling installation cylinder;

[0014] The output conduit extends from the top of the particle settling installation cylinder, a settling aeration cylinder is arranged near the bottom of the particle settling installation cylinder, the output conduit extending into the particle settling installation cylinder is connected to the settling aeration cylinder, and a plurality of settling aeration holes are evenly arranged on the settling aeration cylinder;

[0015] An upper drainage partition plate is arranged inside the combined acid-base treatment cylinder, one end of the upper drainage partition plate is connected to the bottom of the combined acid-base treatment cylinder, a pickling zone is formed in the combined acid-base treatment cylinder on one side of the upper drainage partition plate, and an alkali washing zone is formed in the combined acid-base treatment cylinder on the other side of the upper drainage partition plate. The top of the particle settling installation cylinder is connected to the combined acid-base treatment cylinder through a connecting conduit, the pickling zone is matched with the connecting conduit and a drainage conduit is arranged, and a pickling aeration pipe is arranged in the bottom area of ​​the pickling zone and connected to the drainage conduit, and a plurality of pickling aeration holes are arranged on the pickling aeration pipe;

[0016] The alkali washing zone is provided with a lower drainage partition plate in conjunction with the upper drainage partition plate, one end of the lower drainage partition plate is connected to the top of the combined acid-base treatment cylinder, the other end of the lower drainage partition plate is provided with an inclined guide plate, and a plurality of alkali washing aeration holes are provided on the inclined guide plate. The alkali washing zone is provided with a connecting exhaust pipe, which extends from the top of the combined acid-base treatment cylinder.

[0017] As a further solution of the present invention: an annular water inlet pipe and an annular water outlet pipe are arranged on the cylinder wall of the fixed installation cylinder, and a guide cavity is symmetrically arranged inside the swinging installation frame in cooperation with the filter plate. The two groups of guide cavities of the swinging installation frame are connected with the annular water inlet pipe and the annular water outlet pipe respectively through the water inlet hose and the water outlet hose, and a plurality of condensation auxiliary capture tubes are evenly spaced on the side of the swinging installation frame facing the inner wall of the conical guide cylinder, and the two ends of the condensation auxiliary capture tubes are respectively connected to the two groups of guide cavities on the swinging installation frame.

[0018] As a further solution of the present invention: a water supply pipe and a water guide pipe are respectively provided on the annular water inlet pipe and the annular water outlet pipe, and both the water supply pipe and the water guide pipe extend out of the combined installation tube.

[0019] As a further solution of the present invention: a plurality of flow guide installation rods are arranged outside the limit bearing sleeve, and the outer ends of the flow guide installation rods are fixed on the inner wall of the flow guide installation cylinder.

[0020] As a further solution of the present invention: the outer end of the water guide pipe is connected to the bottom of the particle sedimentation installation cylinder, and a sewage pipe is extended from the wall of the particle sedimentation installation cylinder, and a valve body is integrated in the sewage pipe.

[0021] As a further solution of the present invention: the top of the combined acid-base treatment cylinder is respectively provided with a feeding pipe in coordination with the acid washing area and the alkali washing area, and a screw cap is provided on the feeding pipe; the bottom of the combined acid-base treatment cylinder is respectively provided with a discharge pipe in coordination with the acid washing area and the alkali washing area, and a valve body is integrated in the discharge pipe.

[0022] A method for purifying flue gas in a thermal power plant comprises the following steps:

[0023] S1, according to the demand for flue gas purification volume and degree of the thermal power plant, a certain number of the devices are selected for combined installation, specifically, the positioning installation tubes and positioning installation sleeves of adjacent combined installation tubes are inserted into the combined installation, and the positioning installation holes are used for bolt fixation. At this time, the sealing ring is squeezed to achieve sealing, and the flue gas of the thermal power plant is guided in the combined installation tube;

[0024] S2, when the flue gas from the thermal power plant passes through the combined installation cylinder, a small part flows through the gap between the swing installation frame and the guide installation hole, and most of it directly hits the filter plate. As more and more particulate matter is captured on the filter plate, the swing installation frame is lifted by the thrust of the airflow, causing the swing installation frame to rotate closer and closer to the guide installation hole, showing a linear change, until the swing installation frame coincides with the guide installation hole and is restricted from rotating under the action of the rotation limit shaft, reaching a threshold. At this time, the airflow originally passing through the combined installation cylinder rushes to the passive guide module, and under its action, most of the captured substances are introduced into the passive guide module. After a period of time, the captured substances gradually fall off, and under the action of the rotation limit shaft, the swing installation frame slowly resets, and the above steps are repeated;

[0025] S3, the airflow flowing into the guide installation cylinder causes the passive guide blade and the limit shaft to rotate in height, causing the strip elastic member on the limit shaft and the counterweight collision bead to rotate, and the centrifugal force generated causes the strip elastic member to straighten and stretch, so that the counterweight collision bead can collide with the vibration fork. After the collision, the vibration fork generates high-frequency vibration, which resonates with the swing installation frame and the filter plate and condensation auxiliary capture tube thereon, so that the captured substances fall off quickly and enter the guide installation cylinder with the airflow, and then enter the slow flow cylinder through the change-direction bending cylinder, and are exported from the output conduit to the sequential processing mechanism;

[0026] S4, the rising airflow of the flue gas in the thermal power plant is very strong in the pipeline, and the airflow guide radius after reaching the threshold is significantly reduced. Therefore, the airflow and air pressure in the guide installation cylinder gradually decrease with the reset of the swing installation frame after reaching a peak value. The captured substances in this process enter the output duct with the high-speed and high-pressure airflow, and are discharged from the sedimentation aeration holes on the sedimentation aeration cylinder, and some of the substances in them are fully mixed with the liquid in them, and then the gas is introduced into the combined acid-base treatment cylinder;

[0027] S5, injecting a certain amount of pickling consumable liquid and alkali washing consumable liquid into the pickling area and alkali washing area respectively through the feeding pipe, and the gas passing through the particle settling installation cylinder enters the pickling aeration pipe through the connecting pipe and the drainage pipe, and is discharged from the pickling aeration hole through the pickling aeration pipe to complete the pickling treatment;

[0028] S6, the gas that has completed the pickling treatment flows to the other side through the upper drainage partition plate, and then gathers on the lower side of the inclined guide plate through the lower drainage partition plate, and is simultaneously discharged from the alkali washing aeration hole to complete the alkali washing operation. The upper drainage partition plate and the lower drainage partition plate expand the airway of the acid washing outlet gas to prevent the gas after pickling from carrying the pickling consumable liquid into the alkali washing area and causing the loss of the acid and alkali consumable liquid, thereby ensuring the quality of the acid and alkali washing and continuous operation. Finally, the gas from the combined acid and alkali treatment cylinder is discharged from the connected exhaust pipe.

[0029] As a further scheme of the present invention: while step S2 is being carried out, the water supply pipe introduces room temperature liquid, which enters into each water inlet hose along the annular water inlet pipe, and enters into a group of diversion cavities in the swing installation frame through the water inlet hose, and then is guided into another group of diversion cavities in the swing installation frame through each condensation auxiliary capture tube, and then enters into the annular water outlet pipe through the water outlet hose, and finally is guided out from the water guide pipe. During this process, the temperature of the condensation auxiliary capture tube is always maintained at a low level, and the liquefiable substances in the flue gas of the thermal power plant are liquefied on the surface of the condensation auxiliary capture tube, and the liquefied substances can assist in the adsorption of particulate matter.

[0030] As a further solution of the present invention: during step S4, the water pipe conducts the heat absorbed by the condensation auxiliary capture tube along with the liquid into the particle sedimentation installation cylinder, so that the particle sedimentation installation cylinder can be maintained at a certain temperature, thereby improving the adsorption efficiency of the captured substance. The drain pipe is connected to the external pipeline, and the valve body is opened regularly to discharge sewage, which is convenient for recovery and further processing.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] It can be quickly assembled and installed according to different purification requirements to achieve multi-level purification operations, and is more convenient to transport and maintain;

[0033] It can simultaneously realize liquefaction to enhance the capture effect of fine particles, and automatically clean and process the captured materials through the threshold mechanism. At the same time, it cooperates with passive centrifugal oscillation to remove materials, so that the material capture ability of the device can be maintained stably for a long time, thereby improving the efficiency and service life of the device.

[0034] The heat absorbed by condensation can improve the particle adsorption effect, while optimizing the acid and alkali washing structure, further improving the purification level of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional schematic diagram of a flue gas purification device for a thermal power plant.

[0036] Figure 2 It is a partial cross-sectional schematic diagram of a flue gas purification device for a thermal power plant.

[0037] Figure 3 for Figure 2 A further cross-sectional schematic diagram of .

[0038] Figure 4 It is a front view stereoscopic schematic diagram of a threshold value capture and export mechanism in a flue gas purification device of a thermal power plant.

[0039] Figure 5 It is a schematic upward stereoscopic diagram of a threshold value capture and export mechanism in a flue gas purification device of a thermal power plant.

[0040] Figure 6 The present invention is a partial cross-sectional schematic diagram of a threshold value capture and export mechanism in a flue gas purification device of a thermal power plant.

[0041] Figure 7 for Figure 6 Enlarged schematic diagram of point a in the middle.

[0042] Figure 8 The present invention is a partial cross-sectional schematic diagram of a swing mounting frame in a flue gas purification device of a thermal power plant.

[0043] 1-combined installation cylinder, 2-positioning installation sleeve, 3-positioning installation cylinder, 4-direction bending cylinder, 5-sealing ring, 6-positioning installation hole, 7-particle sedimentation installation cylinder, 8-combined acid-base treatment cylinder, 9-slow flow cylinder, 10-output conduit, 11-connecting conduit, 12-water supply pipe, 13-water guide pipe, 14-feeding pipe, 15-discharge pipe, 16-flow diversion installation cylinder, 17-drainage pipe, 18-sedimentation aeration cylinder, 19-sedimentation aeration hole, 20-drainage conduit, 21-pickling area, 22-upper drainage partition plate, 23-pickling aeration pipe, 24-pickling aeration hole, 25- Lower drainage partition plate, 26- inclined guide plate, 27- alkali washing area, 28- alkali washing aeration hole, 29- fixed installation cylinder, 30- annular water inlet pipe, 31- annular water outlet pipe, 32- rotation limit shaft, 33- water inlet hose, 34- water outlet hose, 35- filter plate, 36- cone guide cylinder, 37- guide installation hole, 38- swing installation frame, 39- limit bearing sleeve, 40- vibration fork, 41- strip elastic part, 42- counterweight collision bead, 43- condensation auxiliary capture tube, 44- limit rotating shaft, 45- passive guide blade, 46- guide installation rod, 47- guide cavity. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0045] For example, see Figure 1 to Figure 3In an embodiment of the present invention, a flue gas purification device for a thermal power plant includes a combined installation tube 1, one end of the combined installation tube 1 is provided with a positioning installation sleeve 2, the other end of the combined installation tube 1 is provided with a positioning installation tube 3, the positioning installation tube 3 is nested with the positioning installation sleeve 2, the bottom of the positioning installation sleeve 2 is provided with a sealing ring 5 in cooperation with the positioning installation tube 3, a plurality of positioning installation holes 6 are provided at equal angles on the positioning installation sleeve 2 and the positioning installation tube 3, and also includes: a threshold capture export mechanism and a sequence processing mechanism provided with the matching threshold capture export mechanism.

[0046] According to the demand for the amount and degree of flue gas purification in a thermal power plant, a certain number of the devices are selected for combined installation. Specifically, the positioning installation tubes 3 and the positioning installation sleeves 2 of adjacent combined installation tubes 1 are inserted into the combined installation and fixed with bolts through the positioning installation holes 6. At this time, the sealing ring 5 is squeezed to achieve sealing. The flue gas of the thermal power plant is diverted in the combined installation tube 1. During the diversion process, the threshold capture and export mechanism captures particulate matter and some condensable substances. When the capture reaches the threshold, some of the captured substances are exported and introduced into the sequential processing mechanism for aeration and acid-base washing. Multiple groups of the devices simultaneously perform flue gas purification treatment in thermal power plants, and the flue gas purification operation of thermal power plants has been realized.

[0047] Example 2, based on Example 1, please refer to Figures 4 to 8 ,In the embodiment of the present invention, the threshold capture and export mechanism includes a threshold capture module and a passive diversion module;

[0048] The threshold capture module includes a fixed installation cylinder 29, which is connected to the inner wall of the combined installation cylinder 1. A conical guide cylinder 36 is provided at one end of the fixed installation cylinder 29. A plurality of guide installation holes 37 are provided at equal angles on the cylinder wall of the conical guide cylinder 36. A swing installation frame 38 is provided inside the guide installation holes 37. A filter plate 35 is provided inside the swing installation frame 38. One end of the swing installation frame 38 is rotatably installed on one end of the guide installation hole 37 through a rotation limit shaft 32. A vibration fork 40 is provided at the other end of the swing installation frame 38. The rotation limit shaft 32 limits the rotation when the swing installation frame 38 and the guide installation hole 37 coincide.

[0049] An annular water inlet pipe 30 and an annular water outlet pipe 31 are arranged on the wall of the fixed installation cylinder 29, and a guide cavity 47 is symmetrically arranged inside the swing installation frame 38 in cooperation with the filter plate 35. The two groups of guide cavities 47 of the swing installation frame 38 are respectively connected with the annular water inlet pipe 30 and the annular water outlet pipe 31 through the water inlet hose 33 and the water outlet hose 34. A plurality of condensation auxiliary capture pipes 43 are evenly spaced on one side of the swing installation frame 38 facing the inner wall of the conical guide cylinder 36, and the two ends of the condensation auxiliary capture pipes 43 are respectively connected with the two groups of guide cavities 47 on the swing installation frame 38. The annular water inlet pipe 30 and the annular water outlet pipe 31 are respectively provided with a water supply pipe 12 and a water guide pipe 13, and both the water supply pipe 12 and the water guide pipe 13 extend out of the combined installation cylinder 1.

[0050] When the flue gas from the thermal power plant passes through the combined installation cylinder 1, a small part flows through the gap between the swing installation frame 38 and the guide installation hole 37, and most of it directly hits the filter plate 35. As more and more particulate matter is captured on the filter plate 35, the swing installation frame 38 is lifted by the thrust of the airflow, so that the swing installation frame 38 rotates closer and closer to the guide installation hole 37, showing a linear change, until the swing installation frame 38 coincides with the guide installation hole 37 and is restricted from rotating under the action of the rotation limit shaft 32, reaching a threshold. At this time, the airflow originally passing through the combined installation cylinder 1 rushes to the passive guide module, and under its action, most of the captured substances are introduced into the passive guide module. After a period of time, the captured substances gradually fall off, and under the action of the rotation limit shaft 32, the swing installation frame 38 slowly resets, and the above steps are repeated;

[0051] At the same time, the water supply pipe 12 introduces room temperature liquid, which enters each water inlet hose 33 along the annular water inlet pipe 30, and enters a group of diversion chambers 47 in the swing mounting frame 38 through the water inlet hose 33, and then is guided into another group of diversion chambers 47 in the swing mounting frame 38 through each condensation auxiliary capture tube 43, and then enters the annular water outlet pipe 31 through the water outlet hose 34, and finally is discharged from the water guide pipe 13. During this process, the temperature of the condensation auxiliary capture tube 43 is always maintained at a low level, and the liquefiable substances in the flue gas of the thermal power plant are liquefied on the surface of the condensation auxiliary capture tube 43. The liquefied substances can assist in the adsorption of fine particles, and simultaneously improve the types and efficiency of captured substances.

[0052] Example 3, based on Example 1, please refer to Figures 4 to 8 In the embodiment of the present invention, the passive flow guide module includes a flow guide installation tube 16, one end of the flow guide installation tube 16 is connected to the end of the conical flow guide tube 36, and the other end of the flow guide installation tube 16 is connected to a direction-changing curved tube 4, the direction-changing curved tube 4 extends out of the combined installation tube 1, and the outer end of the direction-changing curved tube 4 is provided with a slow flow tube 9, and the slow flow tube 9 extends out to provide an output conduit 10;

[0053] A limited rotation shaft 44 is arranged inside the guide mounting cylinder 16, and a limited bearing sleeve 39 is arranged in conjunction with the limited rotation shaft 44. A plurality of guide mounting rods 46 are arranged outside the limited bearing sleeve 39, and the outer ends of the guide mounting rods 46 are fixed on the inner wall of the guide mounting cylinder 16. A plurality of passive guide blades 45 are arranged at equal angles on the limited rotation shaft 44 on one side of the limited bearing sleeve 39, and a strip elastic member 41 is arranged on the limited rotation shaft 44 on the other side of the limited bearing sleeve 39. A counterweight bead 42 is arranged at the outer end of the strip elastic member 41. The strip elastic member 41 in a rotating state together with the counterweight bead 42 can collide with the vibration fork 40.

[0054] The airflow flowing into the guide installation cylinder 16 causes the passive guide blade 45 and the limiting shaft 44 to rotate in height, causing the strip elastic member 41 on the limiting shaft 44 and the counterweight bead 42 to rotate. The centrifugal force generated causes the strip elastic member 41 to straighten and stretch, thereby allowing the counterweight bead 42 to collide with the vibration fork 40. After the collision, the vibration fork 40 generates high-frequency vibration, which resonates with the swing installation frame 38 and the filter plate 35 and the condensation auxiliary capture tube 43 thereon, causing the captured substances to fall off quickly and enter the guide installation cylinder 16 with the airflow, and then enter the slow flow cylinder 9 through the change-of-direction bend cylinder 4, and is exported from the output duct 10 to the sequential processing mechanism.

[0055] Example 4, based on Example 1, please refer to Figure 1-2 In the embodiment of the present invention, a sequential processing mechanism is provided with a matching threshold capture and export mechanism, and the sequential processing mechanism includes a particle settling installation cylinder 7 provided on the outer wall of the combined installation cylinder 1, and a combined acid-base treatment cylinder 8 is provided on the outer wall of the combined installation cylinder 1 on one side of the particle settling installation cylinder 7;

[0056] The output conduit 10 extends from the top of the particle sedimentation installation cylinder 7, and a sedimentation aeration cylinder 18 is arranged near the bottom of the particle sedimentation installation cylinder 7. The output conduit 10 extending deep into the particle sedimentation installation cylinder 7 is connected with the sedimentation aeration cylinder 18, and a plurality of sedimentation aeration holes 19 are evenly arranged on the sedimentation aeration cylinder 18. The outer end of the water guide pipe 13 is connected with the bottom of the particle sedimentation installation cylinder 7, and a sewage pipe 17 is extended from the wall of the particle sedimentation installation cylinder 7, and a valve body is integrated in the sewage pipe 17.

[0057] The rising airflow of the flue gas in the thermal power plant is very strong in the pipeline, and the airflow guide radius after reaching the threshold value is significantly reduced. Therefore, the airflow and air pressure in the guide installation cylinder 16 gradually decrease as the swing installation frame 38 is reset after reaching a peak value. The captured substances in this process enter the output duct 10 with the high-speed and high-pressure airflow, and are discharged from the sedimentation aeration holes 19 on the sedimentation aeration cylinder 18, and part of the substances therein are fully mixed with the liquid therein, and then the gas is introduced into the combined acid-base treatment cylinder 8;

[0058] The water pipe 13 conducts the heat absorbed by the condensation auxiliary capture tube 43 along with the liquid into the particle sedimentation installation cylinder 7, so that the particle sedimentation installation cylinder 7 can be maintained at a certain temperature, thereby improving the adsorption efficiency of the captured substances. The sewage pipe 17 is connected to the external pipeline, and the valve body is opened regularly to discharge sewage, which is convenient for recovery and further processing.

[0059] Example 5, based on Example 1, please refer to Figure 3 In the embodiment of the present invention, an upper drainage partition plate 22 is provided inside the combined acid-base treatment cylinder 8, one end of the upper drainage partition plate 22 is connected to the bottom of the combined acid-base treatment cylinder 8, a pickling area 21 is formed in the combined acid-base treatment cylinder 8 on one side of the upper drainage partition plate 22, and an alkali washing area 27 is formed in the combined acid-base treatment cylinder 8 on the other side of the upper drainage partition plate 22. The top of the particle settling installation cylinder 7 is connected to the combined acid-base treatment cylinder 8 through a connecting conduit 11, and the pickling area 21 is provided with a drainage conduit 20 in conjunction with the connecting conduit 11. The bottom area of ​​the pickling area 21 is connected to the drainage conduit 20 and provided with a pickling aeration pipe 23, and the pickling aeration pipe 23 is provided with a plurality of pickling aeration holes 24;

[0060] The alkali washing area 27 is provided with a lower drainage partition plate 25 in cooperation with the upper drainage partition plate 22. One end of the lower drainage partition plate 25 is connected to the top of the combined acid-base treatment cylinder 8. The other end of the lower drainage partition plate 25 is provided with an inclined guide plate 26. The inclined guide plate 26 is provided with a plurality of alkali washing aeration holes 28. The alkali washing area 27 is provided with a connecting exhaust pipe, which extends from the top of the combined acid-base treatment cylinder 8.

[0061] The top of the combined acid-base treatment cylinder 8 is respectively provided with a feeding pipe 14 in cooperation with the acid washing zone 21 and the alkaline washing zone 27, and a screw cap is provided on the feeding pipe 14. The bottom of the combined acid-base treatment cylinder 8 is respectively provided with a discharge pipe 15 in cooperation with the acid washing zone 21 and the alkaline washing zone 27, and a valve body is integrated in the discharge pipe 15.

[0062] A certain amount of pickling consumable liquid and alkali washing consumable liquid are respectively injected into the pickling zone 21 and the alkali washing zone 27 through the feeding pipe 14, and the gas passing through the particle settling installation cylinder 7 enters the pickling aeration pipe 23 through the connecting pipe 11 and the drainage pipe 20, and is discharged from the pickling aeration hole 24 through the pickling aeration pipe 23 to complete the pickling treatment;

[0063] The gas that has completed the pickling treatment flows to the other side through the upper drainage partition plate 22, and then gathers on the lower side of the inclined guide plate 26 through the lower drainage partition plate 25, and is discharged from the alkali washing aeration hole 28 to complete the alkali washing operation. The upper drainage partition plate 22 and the lower drainage partition plate 25 expand the airway of the acid washing gas output, so as to prevent the gas after the pickling from carrying the acid washing consumable liquid into the alkali washing area 27 and causing the loss of the acid and alkali consumable liquid, thereby ensuring the quality and continuous operation of the acid and alkali washing;

[0064] Finally, the gas passing through the combined acid-base treatment cylinder 8 is discharged from the connecting exhaust pipe. Since the connecting exhaust pipe is pre-connected with the external pipeline, it is convenient for gas collection and further treatment;

[0065] The discharge pipe 15 cooperates with the valve body to realize the replacement of the acid and alkali cleaning consumable liquid.

[0066] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A flue gas purification device for a thermal power plant, comprising a combined installation tube (1), one end of the combined installation tube (1) is provided with a positioning installation sleeve (2), and the other end of the combined installation tube is provided with a positioning installation tube (3), characterized in that: Also includes: A threshold capture export mechanism, including a threshold capture module and a passive diversion module; The threshold capture module comprises a fixed installation cylinder (29), the fixed installation cylinder (29) is connected to the inner wall of the combined installation cylinder (1), a conical guide cylinder (36) is arranged at one end of the fixed installation cylinder (29), a plurality of guide installation holes (37) are arranged at equal angles on the cylinder wall of the conical guide cylinder (36), a swing installation frame (38) is arranged inside the guide installation hole (37), a filter plate (35) is arranged on the inner side of the swing installation frame (38), one end of the swing installation frame (38) is rotatably mounted on one end of the guide installation hole (37) through a rotation limit shaft (32), a vibration fork (40) is arranged at the other end of the swing installation frame (38), and the rotation limit shaft (32) limits the rotation when the swing installation frame (38) and the guide installation hole (37) overlap; The passive flow guide module comprises a flow guide installation cylinder (16), one end of the flow guide installation cylinder (16) is connected to the end of the conical flow guide cylinder (36), the other end of the flow guide installation cylinder (16) is connected to a direction-changing curved cylinder (4), the direction-changing curved cylinder (4) extends out of the combined installation cylinder (1), and a slow-flow cylinder (9) is provided at the outer end of the direction-changing curved cylinder (4), and an output conduit (10) is provided extending out of the slow-flow cylinder (9); A limited position rotating shaft (44) is arranged inside the flow guide installation cylinder (16), and a limited position bearing sleeve (39) is arranged in coordination with the limited position rotating shaft (44); A plurality of passive guide vanes (45) are arranged at equal angles on the limiting rotating shaft (44) on one side of the limiting bearing sleeve (39); a strip elastic member (41) is arranged on the limiting rotating shaft (44) on the other side of the limiting bearing sleeve (39); a counterweight collision bead (42) is arranged at the outer end of the strip elastic member (41); the strip elastic member (41) in a rotating state collides with the vibration fork (40) together with the counterweight collision bead (42); A sequential processing mechanism provided in conjunction with the threshold capture and export mechanism, the sequential processing mechanism comprising a particle settling installation cylinder (7) provided on the outer wall of the combined installation cylinder (1), and a combined acid-base treatment cylinder (8) provided on the outer wall of the combined installation cylinder (1) on one side of the particle settling installation cylinder (7); The output conduit (10) extends from the top of the particle settling installation cylinder (7), a settling aeration cylinder (18) is arranged near the bottom of the particle settling installation cylinder (7), the output conduit (10) extending deep into the particle settling installation cylinder (7) is connected to the settling aeration cylinder (18), and a plurality of settling aeration holes (19) are evenly arranged on the settling aeration cylinder (18); The combined acid-base treatment cylinder (8) is provided with an upper drainage partition plate (22) inside, one end of the upper drainage partition plate (22) is connected to the bottom of the combined acid-base treatment cylinder (8), an acid washing area is formed in the combined acid-base treatment cylinder (8) on one side of the upper drainage partition plate (22), and an alkali washing area (27) is formed in the combined acid-base treatment cylinder (8) on the other side of the upper drainage partition plate (22), the top of the particle settling installation cylinder (7) is connected to the combined acid-base treatment cylinder (8) through a connecting conduit (11), the acid washing area (21) is provided with a drainage conduit (20) in coordination with the connecting conduit (11), and the bottom area of ​​the acid washing area (21) is connected to the drainage conduit (20) and provided with an acid washing aeration pipe (23), and the acid washing aeration pipe (23) is provided with a plurality of acid washing aeration holes (24); The alkali washing zone (27) is provided with a lower drainage partition plate (25) in cooperation with the upper drainage partition plate (22); one end of the lower drainage partition plate (25) is connected to the top of the combined acid-base treatment cylinder (8); the other end of the lower drainage partition plate (25) is provided with an inclined guide plate (26); a plurality of alkali washing aeration holes (28) are provided on the inclined guide plate (26); the alkali washing zone (27) is provided with a connecting exhaust pipe, which extends from the top of the combined acid-base treatment cylinder (8).

2. A flue gas purification device for a thermal power plant according to claim 1, characterized in that: The positioning installation tube (3) is nested with the positioning installation sleeve (2), the bottom of the positioning installation sleeve (2) is provided with a sealing ring (5) to cooperate with the positioning installation tube (3), and a plurality of positioning installation holes (6) are provided at equal angles on the positioning installation sleeve (2) and the positioning installation tube (3).

3. A flue gas purification device for a thermal power plant according to claim 1, characterized in that: An annular water inlet pipe (30) and an annular water outlet pipe (31) are arranged on the wall of the fixed installation cylinder (29); a guide cavity (47) is symmetrically arranged inside the swing installation frame (38) in cooperation with the filter plate (35); the two groups of guide cavities (47) of the swing installation frame (38) are respectively connected to the annular water inlet pipe (30) and the annular water outlet pipe (31) through a water inlet hose (33) and a water outlet hose (34); a plurality of condensation auxiliary capture tubes (43) are evenly spaced on one side of the swing installation frame (38) facing the inner wall of the conical guide cylinder (36); and the two ends of the condensation auxiliary capture tubes (43) are respectively connected to the two groups of guide cavities (47) on the swing installation frame (38).

4. A flue gas purification device for a thermal power plant according to claim 3, characterized in that: The annular water inlet pipe (30) and the annular water outlet pipe (31) are respectively provided with a water delivery pipe (12) and a water guide pipe (13), and both the water delivery pipe (12) and the water guide pipe (13) extend out of the combined installation tube (1).

5. A flue gas purification device for a thermal power plant according to claim 1, characterized in that: A plurality of flow guide mounting rods (46) are arranged outside the limiting bearing sleeve (39), and the outer ends of the flow guide mounting rods (46) are fixed on the inner wall of the flow guide mounting cylinder (16).

6. A flue gas purification device for a thermal power plant according to claim 4, characterized in that: The outer end of the water guide pipe (13) is in communication with the bottom of the particle settling installation cylinder (7), a sewage pipe (17) is provided on the wall of the particle settling installation cylinder (7), and a valve body is integrated in the sewage pipe (17).

7. A flue gas purification device for a thermal power plant according to claim 1, characterized in that: The top of the combined acid-base treatment cylinder (8) is provided with a feeding pipe (14) in cooperation with the acid washing area (21) and the alkali washing area (27), and a screw cap is provided on the feeding pipe (14). The bottom of the combined acid-base treatment cylinder (8) is provided with a discharge pipe (15) in cooperation with the acid washing area (21) and the alkali washing area (27), and a valve body is integrated in the discharge pipe (15).

8. The purification method of the flue gas purification device of a thermal power plant according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, according to the requirements of the amount and degree of smoke purification of the thermal power plant, a certain number of smoke purification devices are selected for combined installation, specifically, the positioning installation cylinders (3) and positioning installation sleeves (2) of adjacent combined installation cylinders (1) are inserted into the combined installation, and are fixed by bolts through the positioning installation holes (6), at which time the sealing ring (5) is squeezed to achieve sealing, and the smoke of the thermal power plant is guided in the combined installation cylinder (1); S2, when the flue gas from the thermal power plant passes through the combined installation cylinder (1), a small portion flows through the gap between the swing installation frame (38) and the guide installation hole (37), and most of it directly hits the filter plate (35). As more and more particulate matter is captured on the filter plate (35), the swing installation frame (38) is lifted by the thrust of the airflow, so that the swing installation frame (38) rotates closer and closer to the guide installation hole (37), showing a linear change, until the swing installation frame (38) coincides with the guide installation hole (37) and is restricted from rotating under the action of the rotation limit shaft (32) until a threshold value is reached. At this time, the airflow originally passing through the combined installation cylinder (1) rushes to the passive guide module, and under its action, most of the captured substances are introduced into the passive guide module. After a period of time, as the captured substances gradually fall off, under the action of the rotation limit shaft (32), the swing installation frame (38) slowly resets, and the above steps are repeated; S3, the airflow flowing into the guide installation cylinder (16) causes the passive guide blade (45) and the limit rotating shaft (44) to rotate in a high degree, causing the strip elastic member (41) on the limit rotating shaft (44) and the counterweight collision bead (42) to rotate, and the centrifugal force generated causes the strip elastic member (41) to straighten and stretch, so that the counterweight collision bead (42) can collide with the vibration fork (40), and the vibration fork (40) after the collision generates high-frequency vibration, which resonates with the swing installation frame (38) and the filter plate (35) and the condensation auxiliary capture tube (43) thereon, so that the captured substances fall off quickly, enter the guide installation cylinder (16) along with the airflow, and then enter the slow flow cylinder (9) through the change-direction bending cylinder (4), and are output from the output conduit (10) to the sequential processing mechanism; S4, the rising airflow of the flue gas in the thermal power plant in the pipeline is very strong, and the airflow guide radius after reaching the threshold value is significantly reduced. Therefore, the airflow and air pressure in the guide installation cylinder (16) gradually decrease after reaching a peak value as the swing installation frame (38) is reset. In this process, the captured substances enter the output conduit (10) along with the high-speed and high-pressure airflow, and are discharged from the sedimentation aeration holes (19) on the sedimentation aeration cylinder (18), and part of the substances therein are fully mixed with the liquid therein, and then the gas is introduced into the combined acid-base treatment cylinder (8); S5, injecting a certain amount of pickling consumable liquid and alkali washing consumable liquid into the pickling zone (21) and the alkali washing zone (27) respectively through the feeding pipe (14), and the gas passing through the particle settling installation cylinder (7) enters the pickling aeration pipe (23) through the connecting pipe (11) and the drainage pipe (20), and is discharged from the pickling aeration hole (24) through the pickling aeration pipe (23), thereby completing the pickling treatment; S6, the gas that has completed the pickling treatment flows to the other side through the upper drainage partition plate (22), and then gathers on the lower side of the inclined guide plate (26) through the lower drainage partition plate (25), and is simultaneously discharged from the alkali washing aeration hole (28), completing the alkali washing operation. The upper drainage partition plate (22) and the lower drainage partition plate (25) expand the airway of the acid washing outlet gas, and finally the gas is discharged from the connected exhaust pipe through the combined acid and alkali treatment cylinder (8).

9. A method for purifying flue gas from a thermal power plant according to claim 8, characterized in that: While step S2 is being performed, the water supply pipe (12) introduces room temperature liquid, which enters each water inlet hose (33) along the annular water inlet pipe (30), and enters a group of guide cavities (47) in the swing mounting frame (38) through the water inlet hose (33), and then is guided into another group of guide cavities in the swing mounting frame (38) through each condensation auxiliary capture tube, and then enters the annular water outlet pipe (31) through the water outlet hose (34), and finally is discharged from the water guide pipe (13).

10. A method for purifying flue gas in a thermal power plant according to claim 8, characterized in that: During step S4, the water pipe (13) conducts the heat absorbed by the condensation auxiliary capture tube (43) along with the liquid into the particle settling installation cylinder (7), and the sewage pipe (17) is connected to the external pipeline, and the valve body is opened regularly to discharge sewage.

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