A flue gas purification device and method for thermal power plants

Abstract

The application discloses a flue gas purification device and method for thermal power plants, which comprises a combined installation cylinder, one end of the combined installation cylinder is provided with a positioning installation sleeve, and the other end of the combined installation cylinder is provided with a positioning installation cylinder, further comprising: a threshold capture leading-out mechanism and a sequential processing mechanism matched with the threshold capture leading-out mechanism, which can be quickly combined and installed according to different purification requirements, realize multi-level purification operation, and have transportation convenience and maintainability; can synchronously realize liquefaction promotion of fine particulate matter capture effect, and automatically periodically clean and process captured substances through a threshold mechanism, while cooperating with passive centrifugal oscillation demolding, so that the substance capture capacity of the device is stably maintained for a long time, so as to improve the efficiency and service life of the device; can improve the particle adsorption effect through the heat absorbed by condensation, and optimize the acid-base washing structure, further improve the purification level of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flue gas purification, in particular to a flue gas purification device and method for thermal power plants. BACKGROUND

[0002] With the increasing attention of the public to environmental quality, the demand for blue sky and fresh air is becoming stronger and stronger. 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 and the quality of life of residents in the surrounding area. Therefore, it is of great social significance to develop new and more efficient flue gas purification devices and methods for thermal power plants.

[0003] Current flue gas purification devices for thermal power plants can perform flue gas purification operations, but have many defects. They often use an integrated structure, which is difficult to transport and maintain. The current equipment uses a fixed filtration structure. Although some equipment can be self-cleaning, it often relies on electronic control. The stability of electronic components is poor at high temperatures, and the sustainability of self-cleaning is significantly insufficient, making it difficult to effectively capture fine particulate matter. Most existing equipment cannot use the energy of thermal power flue gas for further flue gas treatment.

[0004] The present application aims to solve the technical problems existing in the prior art. To this end, a flue gas purification device and method for thermal power plants are provided. SUMMARY

[0005] To solve the above technical problems, the present application provides a flue gas purification device and method for thermal power plants.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A flue gas purification device for thermal power plants, comprising a combined installation cylinder, one end of the combined installation cylinder is provided with a positioning installation sleeve, the other end of the combined installation cylinder is provided with a positioning installation cylinder, the positioning installation cylinder is nested with the positioning installation sleeve, a sealing ring is arranged at the bottom of the positioning installation sleeve matched with the positioning installation cylinder, a plurality of positioning installation holes are arranged at equal angles on the positioning installation sleeve and the positioning installation cylinder, and the device further comprises a threshold capture and guide-out mechanism, which comprises a threshold capture module and a passive flow guide module.

[0008] The threshold capture module comprises a fixed installation cylinder connected with the inner wall of the combined installation cylinder, one end of the fixed installation cylinder is provided with a conical flow guide cylinder, a plurality of flow guide installation holes are arranged at equal angles on the cylinder wall of the conical flow guide cylinder, a swing installation frame is arranged inside each flow guide installation hole, a filter screen plate is arranged on the inner side of each swing installation frame, one end of each swing installation frame is rotatably installed at one end of the flow guide installation hole through a rotation limiting shaft, and the other end of each swing installation frame is provided with a vibration fork. The rotation limiting shaft limits rotation when the swing installation frame and the flow guide installation hole coincide.

[0009] The passive flow guide module comprises a flow guide mounting cylinder, one end of the flow guide mounting cylinder is connected with the end of the conical flow guide cylinder, and the other end of the flow guide mounting cylinder is provided with a variable-direction bent cylinder in communication, the variable-direction bent cylinder extends out of the combined mounting cylinder, and the outer end of the variable-direction bent cylinder is provided with a slow-flow cylinder, and the slow-flow cylinder extends out of an output guide pipe;

[0010] The flow guide mounting cylinder is internally provided with a limiting rotating shaft, and a limiting bearing sleeve is arranged in cooperation with the limiting rotating shaft;

[0011] A plurality of passive flow guide vanes are arranged at equal angles on the limiting rotating shaft on one side of the limiting bearing sleeve, a strip-shaped elastic member is arranged on the limiting rotating shaft on the other side of the limiting bearing sleeve, the outer end of the strip-shaped elastic member is provided with a counterweight impact bead, and the strip-shaped elastic member in the rotating state can collide and vibrate the fork together with the counterweight impact bead;

[0012] A sequence processing mechanism is arranged in cooperation with the threshold value capturing and exporting mechanism, the sequence processing mechanism comprises a particle sedimentation mounting cylinder arranged on the outer wall of the combined mounting cylinder, and a combined acid-alkali treatment cylinder is arranged on the outer wall of the combined mounting cylinder on one side of the particle sedimentation mounting cylinder;

[0013] The output guide pipe extends into the particle sedimentation mounting cylinder from the top of the particle sedimentation mounting cylinder, a sedimentation aeration cylinder is arranged in the particle sedimentation mounting cylinder close to the bottom, the output guide pipe deeply extending into the particle sedimentation mounting cylinder is in communication with the sedimentation aeration cylinder, and a plurality of sedimentation aeration holes are uniformly arranged on the sedimentation aeration cylinder;

[0014] The combined acid-alkali treatment cylinder is internally provided with an upper drainage partition plate, one end of the upper drainage partition plate is connected with the bottom of the combined acid-alkali treatment cylinder, an acid pickling area is formed in the combined acid-alkali treatment cylinder on one side of the upper drainage partition plate, an alkali washing area is formed in the combined acid-alkali treatment cylinder on the other side of the upper drainage partition plate, the top of the particle sedimentation mounting cylinder is connected with the combined acid-alkali treatment cylinder through a communication guide pipe, the acid pickling area is provided with a drainage guide pipe in cooperation with the communication guide pipe, an acid pickling aeration pipe is arranged in the bottom area of the acid pickling area in communication with the drainage guide pipe, and a plurality of acid pickling aeration holes are arranged on the acid pickling aeration pipe;

[0015] The alkali washing area is provided with a lower drainage partition plate in cooperation with the upper drainage partition plate, one end of the lower drainage partition plate is connected with the top of the combined acid-alkali treatment cylinder, the other end of the lower drainage partition plate is provided with an inclined flow guide plate, a plurality of alkali washing aeration holes are arranged on the inclined flow guide plate, and the alkali washing area is provided with a communication exhaust pipe, which extends out of the top of the combined acid-alkali treatment cylinder.

[0016] As a further scheme of the present application: the cylinder wall of the fixed mounting cylinder is provided with annular water inlet pipe and annular water outlet pipe, the swing mounting frame is symmetrically provided with flow guide cavities in cooperation with the filter screen plate, the two groups of flow guide cavities of the swing mounting frame are communicated with the annular water inlet pipe and the annular water outlet pipe through the water inlet hose and the water outlet hose respectively, and the swing mounting frame is provided with a plurality of condensation auxiliary capture pipes at equal intervals on the side facing the inner wall of the conical flow guide cylinder.

[0017] As a further scheme of the present application: the annular water inlet pipe and the annular water outlet pipe are respectively provided with water feeding pipe and water guide pipe, and the water feeding pipe and the water guide pipe both extend out of the combined mounting cylinder.

[0018] As a further scheme of the present application: the outer part of the limiting bearing sleeve is provided with a plurality of flow guide mounting rods, and the outer ends of the flow guide mounting rods are all fixed on the inner wall of the flow guide mounting cylinder.

[0019] As a further scheme of the present application: the outer end of the water guide pipe is communicated with the bottom of the particle sedimentation mounting cylinder, and the particle sedimentation mounting cylinder is provided with a blowdown pipe extending out of the cylinder wall, and the blowdown pipe is integrated with a valve body.

[0020] As a further scheme of the present application: the combined acid-base treatment cylinder is provided with a feeding pipe on the top of the acid washing area and the alkali washing area respectively, the feeding pipe is provided with a screw cap, and the combined acid-base treatment cylinder is provided with a discharge pipe on the bottom of the acid washing area and the alkali washing area respectively, and the discharge pipe is integrated with a valve body.

[0021] A flue gas purification method for a thermal power plant, comprising the following steps:

[0022] S1, according to the demand of flue gas purification amount and degree of the thermal power plant, a certain number of the present device are selected for combined installation, specifically, the positioning mounting cylinder and the positioning mounting sleeve of the adjacent combined mounting cylinder are inserted into the combined installation, and are fixed by bolts through the positioning installation hole, at this time, the sealing ring is extruded to realize sealing, and the flue gas of the thermal power plant is guided in the combined mounting cylinder;

[0023] S2, when the flue gas of the thermal power plant passes through the combined mounting cylinder, a small part of the flue gas flows through the gap between the swing mounting frame and the flow guide mounting hole, and most of the flue gas directly hits the filter screen plate, as the captured particles on the filter screen plate become more and more, the swing mounting frame is pushed by the air flow and is lifted, so that the swing mounting frame rotates and moves closer to the flow guide mounting hole, showing linear change, until the swing mounting frame coincides with the flow guide mounting hole under the action of the rotation limiting shaft, the rotation is limited, and a threshold value is reached, at this time, the original gas flow in the combined mounting cylinder flows to the passive flow guide module, and under the action of the passive flow guide module, most of the captured substances are introduced into the passive flow guide module, after a period of time, due to the gradual falling of the captured substances, the swing mounting frame is slowly reset under the action of the rotation limiting shaft, and the above steps are repeated.

[0024] S3, the gas flow into the flow guide installation cylinder makes the passive flow guide vane rotate with the limiting rotating shaft, the strip-shaped elastic member on the limiting rotating shaft and the counterweight ball rotate, the centrifugal force generated makes the strip-shaped elastic member straighten and elongate, so that the counterweight ball can collide with the vibrating fork, the vibrating fork after the impact generates high-frequency vibration, and the resonance is to the swing installation frame, the filter screen plate and the condensation auxiliary capture tube on the swing installation frame, so that the captured substances are quickly dropped, and with the gas flow into the flow guide installation cylinder, the gas flow enters the slow flow cylinder through the change direction bending cylinder, and is guided out of the output conduit to the sequential processing mechanism;

[0025] S4, the flue gas of the thermal power plant has strong upward flow in the pipeline, and the flow guide radius of the gas flow after reaching the threshold value is significantly reduced, so that the gas flow and the air pressure in the flow guide installation cylinder gradually decrease after reaching a peak value, and the captured substances enter the output conduit with the high-speed and high-pressure gas flow, and are guided out of the settlement aeration hole on the settlement aeration cylinder, and part of the substances in the settlement aeration cylinder are mixed with the liquid in the settlement aeration cylinder, and then the gas is guided into the combined acid-base treatment cylinder;

[0026] S5, a certain amount of pickling consumption liquid and alkali washing consumption liquid are respectively injected into the pickling area and the alkali washing area through the feeding pipe, the gas passing through the particle settlement installation cylinder enters the pickling aeration pipe through the communication conduit and the drainage conduit, and is guided out of the pickling aeration hole through the pickling aeration pipe, and the acid washing treatment is completed;

[0027] S6, the gas after completing the acid washing treatment flows to the other side of the upper drainage partition plate through the upper drainage partition plate, and then gathers on the lower side of the inclined flow guide plate through the lower drainage partition plate, and is guided out of the alkali washing aeration hole, and the alkali washing operation is completed, the upper drainage partition plate and the lower drainage partition plate enlarge the airway of the acid washing guided gas, avoid the acid washing gas carrying the pickling consumption liquid into the alkali washing area to cause the loss of the acid-base consumption liquid, ensure the quality and continuous operation of the acid-base washing, and finally the gas in the combined acid-base treatment cylinder is guided out of the communication exhaust pipe.

[0028] As a further scheme of the present application: step S2 is performed at the same time, the water feeding pipe guides the normal temperature liquid, the normal temperature liquid enters each water inlet hose along the annular water inlet pipe, and enters a group of flow guide cavities in the swing installation frame through the water inlet hose, then enters another group of flow guide cavities in the swing installation frame through the condensation auxiliary capture tube, and finally enters the annular water outlet pipe through the water outlet hose, and is guided out of the water feeding pipe, in this process, the temperature of the condensation auxiliary capture tube is always kept at a low level, and the substances that can be liquefied 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 adsorbing particulate matter.

[0029] As a further scheme of the present application: in the step S4, the water guide pipe guides the heat absorbed by the condensing auxiliary capture pipe into the particle settling installation cylinder along with the liquid, so that the particle settling installation cylinder can be kept at a certain temperature, improving the adsorption efficiency of the captured substances, the exhaust pipe is communicated with the pipeline arranged outside, and the valve body is opened regularly to discharge sewage, facilitating recycling and further processing.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] It can be quickly combined and installed according to different purification needs, realize multi-level purification operation, and has transportation convenience and maintainability;

[0032] It can simultaneously realize liquefaction to improve the capture effect of fine particulate matter, and automatically clean and process the captured substances periodically through a threshold mechanism, while cooperating with passive centrifugal vibration stripping, so that the substance capture capacity of the device is stably maintained for a long time, thereby improving the efficiency and service life of the device;

[0033] It can improve the particle adsorption effect by condensing heat absorption, and optimize the acid-base washing structure, further improving the purification level of the device. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a three-dimensional schematic view of a flue gas purification device for a thermal power plant.

[0035] Figure 2 It is a partial sectional view of a flue gas purification device for a thermal power plant.

[0036] Figure 3 It is a further sectional view of Figure 2 .

[0037] Figure 4 It is a front view of a threshold capture guide mechanism in a flue gas purification device for a thermal power plant.

[0038] Figure 5 It is a bottom view of a threshold capture guide mechanism in a flue gas purification device for a thermal power plant.

[0039] Figure 6 It is a partial sectional view of a threshold capture guide mechanism in a flue gas purification device for a thermal power plant.

[0040] Figure 7 It is an enlarged view of a at Figure 6 .

[0041] Figure 8 It is a partial sectional view of a swing installation frame in a flue gas purification device for a thermal power plant.

[0042] 1-combination installation cylinder, 2-positioning installation sleeve, 3-positioning installation cylinder, 4-direction changing elbow cylinder, 5-sealing ring, 6-positioning installation hole, 7-particle sedimentation installation cylinder, 8-combination acid and alkali treatment cylinder, 9-low flow cylinder, 10-output conduit, 11-communication conduit, 12-water feeding pipe, 13-water guide pipe, 14-feeding pipe, 15-discharge pipe, 16-flow guide installation cylinder, 17-drainage pipe, 18-sedimentation and aeration cylinder, 19-sedimentation and aeration hole, 20-drainage guide conduit, 21-acid washing area, 22-upper drainage partition plate, 23-acid washing aeration pipe, 24-acid washing aeration hole, 25-lower drainage partition plate, 26-inclined drainage 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 limiting shaft, 33-water inlet hose, 34-water outlet hose, 35-filter screen plate, 36-conical surface flow guide cylinder, 37-flow guide installation hole, 38-oscillating installation frame, 39-limiting bearing sleeve, 40-vibrating fork, 41-strip-shaped elastic member, 42-counterweight impact bead, 43-condensation auxiliary capture pipe, 44-limiting rotation shaft, 45-passive flow guide vane, 46-flow guide installation rod, 47-flow guide cavity. DETAILED DESCRIPTION

[0043] The application will be described in further detail below with reference to the drawings and specific embodiments. The embodiments of the application are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

[0044] Embodiment one, please refer to Figures 1-3 In the embodiment of the application, a flue gas purification device for a thermal power plant comprises a combination installation cylinder 1, one end of the combination installation cylinder 1 is provided with a positioning installation sleeve 2, the other end of the combination installation cylinder 1 is provided with a positioning installation cylinder 3, the positioning installation cylinder 3 is nested with the positioning installation sleeve 2, the bottom of the positioning installation sleeve 2 is provided with a sealing ring 5 matched with the positioning installation cylinder 3, a plurality of positioning installation holes 6 are arranged on the positioning installation sleeve 2 and the positioning installation cylinder 3 at equal angles, and the device further comprises a threshold capture guide-out mechanism and a sequential processing mechanism matched with the threshold capture guide-out mechanism.

[0045] According to the demand of the flue gas purification amount and degree of the thermal power plant, a certain number of the device are selected to be combined and installed, specifically, the positioning installation cylinder 3 and the positioning installation sleeve 2 are inserted into the combined installation, and are fixed by bolts through the positioning installation hole 6, at this time, the sealing ring 5 is extruded to realize sealing, the flue gas of the thermal power plant is guided in the combined installation cylinder 1, and the threshold value capturing guiding-out mechanism captures the particulate matters and part of the condensable substances in the guiding process, when the capture reaches the threshold value, part of the captured substances are guided out to be introduced into the sequential treatment mechanism to be subjected to aeration and acid-base washing treatment, a plurality of the devices are used to synchronously perform the flue gas purification treatment of the thermal power plant, and the flue gas purification operation of the thermal power plant is realized.

[0046] In the embodiment two, on the basis of the embodiment one, referring to Figures 4-8 In the embodiment, the threshold value capturing guiding-out mechanism comprises a threshold value capturing module and a passive guiding module.

[0047] The threshold value capturing module comprises a fixed installation cylinder 29, the fixed installation cylinder 29 is connected with the inner wall of the combined installation cylinder 1, one end of the fixed installation cylinder 29 is provided with a conical flow guiding cylinder 36, a plurality of flow guiding installation holes 37 are arranged at equal angles on the cylinder wall of the conical flow guiding cylinder 36, a swing installation frame 38 is arranged in the flow guiding installation hole 37, a filter screen plate 35 is arranged on the inner side of the swing installation frame 38, one end of the swing installation frame 38 is rotatably installed in one end of the flow guiding installation hole 37 through a rotation limiting shaft 32, the other end of the swing installation frame 38 is provided with a vibration fork 40, and the rotation limiting shaft 32 limits the rotation when the swing installation frame 38 coincides with the flow guiding installation hole 37.

[0048] The cylinder wall of the fixed installation cylinder 29 is provided with a ring-shaped water inlet pipe 30 and a ring-shaped water outlet pipe 31, the swing installation frame 38 is symmetrically provided with a flow guiding cavity 47 in cooperation with the filter screen plate 35, the two groups of flow guiding cavities 47 of the swing installation frame 38 are respectively communicated with the ring-shaped water inlet pipe 30 and the ring-shaped water outlet pipe 31 through a water inlet hose 33 and a water outlet hose 34, a plurality of condensation auxiliary capturing pipes 43 are arranged at equal intervals on the side of the swing installation frame 38 facing the inner wall of the conical flow guiding cylinder 36, and the two ends of the condensation auxiliary capturing pipe 43 are respectively communicated with the two groups of flow guiding cavities 47 on the swing installation frame 38. The ring-shaped water inlet pipe 30 and the ring-shaped water outlet pipe 31 are respectively provided with a water feeding pipe 12 and a water guiding pipe 13, and the water feeding pipe 12 and the water guiding pipe 13 are arranged outside the combined installation cylinder 1.

[0049] When the flue gas of the thermal power plant passes through the combined installation cylinder 1, a small part of the flue gas flows through the gap between the swing installation frame 38 and the flow guide installation hole 37, and most of the flue gas directly hits the filter screen plate 35. As the amount of particulate matter captured on the filter screen plate 35 increases, the swing installation frame 38 is pushed by the air flow and is lifted, causing the swing installation frame 38 to rotate and move closer to the flow guide installation hole 37. The change is linear until the swing installation frame 38 coincides with the flow guide installation hole 37, at which point the rotation is limited by the rotation limiting shaft 32. When the threshold is reached, the air flow that originally passed through the combined installation cylinder 1 flows towards the passive flow guide module, and most of the captured substances are guided into the passive flow guide module. After a period of time, the captured substances gradually fall off, and the swing installation frame 38 slowly resets under the action of the rotation limiting shaft 32, repeating the above steps.

[0050] At the same time, the water supply pipe 12 introduces normal temperature liquid, which enters each water inlet hose 33 along the annular water inlet pipe 30, and then enters a group of flow guide cavities 47 in the swing installation frame 38 through the water inlet hose 33. Subsequently, the liquid is guided into another group of flow guide cavities 47 in the swing installation frame 38 through each condensation auxiliary capture pipe 43, and then enters the annular water outlet pipe 31 through the water outlet hose 34. Finally, the liquid is discharged from the water outlet pipe 13. During this process, the temperature of the condensation auxiliary capture pipe 43 remains low, and the substances that can be liquefied in the flue gas of the thermal power plant are liquefied on the surface of the condensation auxiliary capture pipe 43. The liquefied substances can assist in adsorbing fine particulate matter, thereby simultaneously improving the type and efficiency of the captured substances.

[0051] In Example Three, based on Example One, please refer to Figures 4-8 In the embodiment of the present application, the passive flow guide module includes 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, and the other end of the flow guide installation cylinder 16 is provided with a variable direction elbow cylinder 4. The variable direction elbow cylinder 4 extends out of the combined installation cylinder 1, and the outer end of the variable direction elbow cylinder 4 is provided with a buffer cylinder 9, which extends out of the output pipe 10.

[0052] The flow guide installation cylinder 16 is internally provided with a limiting rotation shaft 44, and a limiting bearing sleeve 39 is arranged in cooperation with the limiting rotation shaft 44. The outer part of the limiting bearing sleeve 39 is provided with a plurality of flow guide installation rods 46, the outer ends of the flow guide installation rods 46 are fixed on the inner wall of the flow guide installation cylinder 16, a plurality of passive flow guide vanes 45 are arranged at equal angles on the limiting rotation shaft 44 on one side of the limiting bearing sleeve 39, and a strip-shaped elastic member 41 is arranged on the limiting rotation shaft 44 on the other side of the limiting bearing sleeve 39. The outer end of the strip-shaped elastic member 41 is provided with a counterweight impact bead 42, and the strip-shaped elastic member 41 in the rotating state can collide and vibrate the fork 40 together with the counterweight impact bead 42.

[0053] The gas flow into the flow guide installation cylinder 16 makes the passive flow guide vane 45 rotate with the limiting rotating shaft 44, and the strip-shaped elastic member 41 on the limiting rotating shaft 44 rotates with the counterweight impact bead 42, the centrifugal force generated by the rotation makes the strip-shaped elastic member 41 straighten and elongate, so that the counterweight impact bead 42 can collide with the vibrating fork 40, the vibrating fork 40 after the impact generates high-frequency vibration, and resonates to the swing installation frame 38, the filter screen plate 35 and the condensation auxiliary capture tube 43 thereon, so that the captured substances are quickly detached, and then enter the slow flow cylinder 9 through the change direction bending cylinder 4, and are guided out of the output conduit 10 to the sequential processing mechanism.

[0054] In the embodiment, the sequential processing mechanism is arranged in the threshold value capture and guide-out mechanism. Figures 1-2 The sequential processing mechanism includes a particle sedimentation installation cylinder 7 arranged on the outer wall of the combined installation cylinder 1, and a combined acid-base treatment cylinder 8 arranged on the outer wall of the combined installation cylinder 1 on one side of the particle sedimentation installation cylinder 7.

[0055] The output conduit 10 extends into the top of the particle sedimentation installation cylinder 7, the particle sedimentation installation cylinder 7 is provided with a sedimentation aeration cylinder 18 close to the bottom, the output conduit 10 extending into the particle sedimentation installation cylinder 7 is in communication with the sedimentation aeration cylinder 18, the sedimentation aeration cylinder 18 is uniformly provided with a plurality of sedimentation aeration holes 19, the outer end of the water guide pipe 13 is in communication with the bottom of the particle sedimentation installation cylinder 7, the particle sedimentation installation cylinder 7 is provided with a blowdown pipe 17 extending out of the cylinder wall, and the blowdown pipe 17 is integrated with a valve body.

[0056] The rising gas flow in the pipeline of the thermal power plant is very strong, and the flow guide radius of the gas flow after reaching the threshold value is significantly reduced, so that the gas flow and the gas pressure in the flow guide installation cylinder 16 gradually decrease after reaching a peak value due to the reset of the swing installation frame 38, in this process, the captured substances enter the output conduit 10 with the high-speed and high-pressure gas flow, and are guided out of the sedimentation aeration holes 19 of the sedimentation aeration cylinder 18, and part of the substances are mixed with the liquid in the sedimentation aeration cylinder 18, and then the gas is guided into the combined acid-base treatment cylinder 8.

[0057] The water guide pipe 13 guides the heat absorbed by the condensation auxiliary capture tube 43 into the particle sedimentation installation cylinder 7, so that the particle sedimentation installation cylinder 7 can be kept at a certain temperature, and the adsorption efficiency of the captured substances is improved, the blowdown pipe 17 is in communication with the pipeline arranged outside, the valve body is opened regularly to blow down, and the recovery and further processing are facilitated.

[0058] In the embodiment, the sequential processing mechanism is arranged in the threshold value capture and guide-out mechanism. Figure 3In the embodiment of the present application, the combined acid and alkali treatment cylinder 8 is internally provided with an upper drainage partition plate 22, one end of the upper drainage partition plate 22 is connected with the bottom of the combined acid and alkali treatment cylinder 8, the combined acid and alkali treatment cylinder 8 on one side of the upper drainage partition plate 22 forms an acid pickling area 21, the combined acid and alkali treatment cylinder 8 on the other side of the upper drainage partition plate 22 forms an alkali washing area 27, the top of the particle sedimentation installation cylinder 7 is connected with the combined acid and alkali treatment cylinder 8 through a communication conduit 11, the acid pickling area 21 is provided with a drainage conduit 20 in cooperation with the communication conduit 11, the bottom area of the acid pickling area 21 is provided with an acid pickling aeration pipe 23 in communication with the drainage conduit 20, and a plurality of acid pickling aeration holes 24 are arranged on the acid pickling aeration pipe 23.

[0059] 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 with the top of the combined acid and alkali treatment cylinder 8, the other end of the lower drainage partition plate 25 is provided with an inclined flow guide plate 26, a plurality of alkali washing aeration holes 28 are arranged on the inclined flow guide plate 26, and the alkali washing area 27 is provided with a communication exhaust pipe which extends from the top of the combined acid and alkali treatment cylinder 8.

[0060] The top of the combined acid and alkali treatment cylinder 8 is provided with a feeding pipe 14 in cooperation with the acid pickling area 21 and the alkali washing area 27, respectively, a screw cap is arranged on the feeding pipe 14, and the bottom of the combined acid and alkali treatment cylinder 8 is provided with a discharge pipe 15 in cooperation with the acid pickling area 21 and the alkali washing area 27, respectively, and a valve body is integrated in the discharge pipe 15.

[0061] A certain amount of acid pickling consumables and alkali washing consumables are respectively injected into the acid pickling area 21 and the alkali washing area 27 through the feeding pipe 14, the gas passing through the particle sedimentation installation cylinder 7 enters the acid pickling aeration pipe 23 through the communication conduit 11 and the drainage conduit 20, and is guided out of the acid pickling aeration holes 24 through the acid pickling aeration pipe 23, thereby completing the acid pickling treatment;

[0062] The gas after completing the acid pickling treatment flows to the other side of the upper drainage partition plate 22, and then is gathered under the lower side of the inclined flow guide plate 26 through the lower drainage partition plate 25, and is guided out of the alkali washing aeration holes 28, thereby completing the alkali washing operation, the upper drainage partition plate 22 and the lower drainage partition plate 25 expand the airway of the acid pickling guided gas, thereby avoiding that the acid pickling consumables are carried into the alkali washing area 27 by the gas after acid pickling, causing the loss of acid and alkali consumables, and ensuring the quality and continuous operation of acid and alkali washing;

[0063] Finally, the gas of the combined acid and alkali treatment cylinder 8 is guided out of the communication exhaust pipe, since the communication exhaust pipe is in advance in communication with the externally arranged pipeline, the collection and further treatment of the gas are facilitated;

[0064] The discharge pipe 15 in cooperation with the valve body can realize the replacement of acid and alkali washing consumables.

[0065] Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, if not specifically described and limited.

Claims

1. A flue gas purification device for a thermal power plant, comprising a combined mounting cylinder (1), a positioning mounting sleeve (2) provided at one end of the combined mounting cylinder (1), and a positioning mounting cylinder (3) provided at the other end of the combined mounting cylinder, characterized in that, Also includes: Threshold capture and export mechanism, including threshold capture module and passive flow diversion module; The threshold capture module includes a fixed mounting cylinder (29), which is connected to the inner wall of the combined mounting cylinder (1). One end of the fixed mounting cylinder (29) is provided with a conical guide cylinder (36). Several guide mounting holes (37) are provided at equal angles on the cylinder wall of the conical guide cylinder (36). A swing mounting frame (38) is provided inside each of the guide mounting holes (37). A filter screen plate (35) is provided on the inner side of each swing mounting frame (38). One end of the swing mounting frame (38) is rotatably mounted on one end of the guide mounting hole (37) through a rotation limit shaft (32). A vibration fork (40) is provided at the other end of the swing mounting frame (38). The rotation limit shaft (32) restricts the rotation when the swing mounting frame (38) coincides with the guide mounting hole (37). The passive flow guiding module includes a flow guiding installation cylinder (16), one end of which is connected to the end of the conical flow guiding cylinder (36), and the other end of the flow guiding installation cylinder (16) is connected to a deflection bend cylinder (4). The deflection bend cylinder (4) extends out of the combined installation cylinder (1), and a flow slowing cylinder (9) is provided at the outer end of the deflection bend cylinder (4). An output conduit (10) extends out of the flow slowing cylinder (9). The flow guide installation cylinder (16) is provided with a limiting pivot (44) inside, and a limiting bearing sleeve (39) is provided in conjunction with the limiting pivot (44); A number of passive guide vanes (45) are provided at equal angles on the limiting shaft (44) on one side of the limiting bearing sleeve (39), and a strip-shaped elastic element (41) is provided on the limiting shaft (44) on the other side of the limiting bearing sleeve (39). A counterweight ball (42) is provided at the outer end of the strip-shaped elastic element (41). The strip-shaped elastic element (41) in the rotating state, together with the counterweight ball (42), collides with the vibration fork (40). The sequential processing mechanism is set with a threshold capture and export mechanism. The sequential processing mechanism includes a particle settling installation cylinder (7) set on the outer wall of the combined installation cylinder (1), and a combined acid and alkali treatment cylinder (8) set 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 provided near the bottom inside the particle settling installation cylinder (7). The output conduit (10) extending into the particle settling installation cylinder (7) is connected to the settling aeration cylinder (18). Several settling aeration holes (19) are evenly provided on the settling aeration cylinder (18). The combined acid-base treatment cylinder (8) is provided with an upper drainage partition plate (22). 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 zone is formed in the combined acid-base treatment cylinder (8) on one side of the upper drainage partition plate (22), and an alkali washing zone (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). A drainage conduit (20) is provided in the acid washing zone (21) in conjunction with the connecting conduit (11). An acid washing aeration pipe (23) is provided in the bottom area of ​​the acid washing zone (21) through the connecting conduit (20). Several acid washing aeration holes (24) are provided on the acid washing aeration pipe (23). The alkaline washing zone (27) is equipped with a lower flow-diverting partition plate (25) in conjunction with the upper flow-diverting partition plate (22). One end of the lower flow-diverting partition plate (25) is connected to the top of the combined acid-base treatment cylinder (8), and the other end of the lower flow-diverting partition plate (25) is equipped with an inclined guide plate (26). The inclined guide plate (26) is equipped with several alkaline washing aeration holes (28). The alkaline washing zone (27) is equipped with a connecting exhaust pipe, which extends from the top of the combined acid-base treatment cylinder (8).

2. The flue gas purification device for thermal power plants according to claim 1, characterized in that, The positioning mounting cylinder (3) is nested with the positioning mounting sleeve (2). The bottom of the positioning mounting sleeve (2) is fitted with a sealing ring (5) to match the positioning mounting cylinder (3). The positioning mounting sleeve (2) and the positioning mounting cylinder (3) are provided with a number of positioning mounting holes (6) at equal angles.

3. The flue gas purification device for thermal power plants according to claim 1, characterized in that, The fixed mounting cylinder (29) is provided with an annular inlet pipe (30) and an annular outlet pipe (31) on its cylinder wall. The swing mounting frame (38) is symmetrically provided with a guide cavity (47) in conjunction with the filter screen plate (35). The two sets of guide cavities (47) of the swing mounting frame (38) are connected to the annular inlet pipe (30) and the annular outlet pipe (31) through the inlet hose (33) and the outlet hose (34) respectively. A number of condensation auxiliary capture tubes (43) are provided at equal intervals on one side of the swing mounting frame (38) facing the inner wall of the conical guide cylinder (36). The two ends of the condensation auxiliary capture tubes (43) are connected to the two sets of guide cavities (47) on the swing mounting frame (38) respectively.

4. The flue gas purification device for thermal power plants according to claim 3, characterized in that, The annular inlet pipe (30) and the annular 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 mounting cylinder (1).

5. The flue gas purification device for thermal power plants according to claim 1, characterized in that, The limiting bearing sleeve (39) is provided with several flow guide mounting rods (46) on its outside, and the outer ends of the flow guide mounting rods (46) are all fixed on the inner wall of the flow guide mounting cylinder (16).

6. The flue gas purification device for thermal power plants according to claim 4, characterized in that, The outer end of the water guide pipe (13) is connected to the bottom of the particle settling installation cylinder (7). A drain pipe (17) extends out from the cylinder wall of the particle settling installation cylinder (7), and a valve body is integrated inside the drain pipe (17).

7. The flue gas purification device for thermal power plants according to claim 1, characterized in that, The top of the combined acid-base treatment cylinder (8) is equipped with a feeding pipe (14) for the acid washing zone (21) and the alkali 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 equipped with a discharge pipe (15) for the acid washing zone (21) and the alkali washing zone (27), and a valve body is integrated inside the discharge pipe (15).

8. The purification method of the flue gas purification device for thermal power plants as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. According to the requirements of flue gas purification quantity and degree of thermal power plant, a certain number of flue gas purification devices are selected for combined installation. Specifically, the positioning installation cylinder (3) and positioning installation sleeve (2) of the adjacent combined installation cylinder (1) are inserted into the combined installation and bolted through the positioning installation hole (6). At this time, the sealing ring (5) is squeezed to achieve sealing, and the flue gas of 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), while most of it directly hits the filter plate (35). As more and more particles are captured on the filter plate (35), the swing installation frame (38) is pushed up by the airflow, causing the swing installation frame (38) to rotate closer and closer to the guide installation hole (37), showing a linear change. When the swing installation frame (38) and the guide installation hole (37) coincide, the rotation is restricted under the action of the rotation limit shaft (32), reaching the threshold. At this time, the airflow that originally passed 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, the swing installation frame (38) slowly resets under the action of the rotation limit shaft (32), and the above steps are repeated. S3, the airflow rushing into the guide installation cylinder (16) causes the passive guide vane (45) and the limiting shaft (44) to rotate at a high height, causing the strip elastic element (41) on the limiting shaft (44) and the counterweight impact ball (42) to rotate. The centrifugal force generated causes the strip elastic element (41) to straighten and elongate, so that the counterweight impact ball (42) can collide with the vibrating fork (40). The vibrating fork (40) after the collision generates high-frequency vibration, which resonates with the swing installation frame (38) and its filter screen plate (35) and condensation auxiliary capture tube (43), causing the captured material to fall off quickly and enter the guide installation cylinder (16) with the airflow. Then, it enters the slow flow cylinder (9) through the deflection bend (4) and is discharged from the output conduit (10) to the sequential processing mechanism. S4, the flue gas of the thermal power plant rises strongly in the pipeline. After reaching the threshold, the airflow guide radius is significantly reduced. Therefore, the airflow and pressure in the guide installation cylinder (16) gradually decrease after reaching a peak value as the swing installation frame (38) resets. During this process, the captured material enters the output duct (10) with the high-speed and high-pressure airflow and is discharged from the settling aeration hole (19) on the settling aeration cylinder (18). Some of the material is fully mixed with the liquid in it. Then the gas is introduced into the combined acid and alkali treatment cylinder (8). S5, a certain amount of pickling consumable liquid and alkaline washing consumable liquid are injected into the pickling zone (21) and alkaline washing zone (27) respectively through the feeding pipe (14). 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; S6, the gas that has completed the pickling treatment flows through the upper flow-guiding partition plate (22) to the other side, and then gathers under the inclined guide plate (26) through the lower flow-guiding partition plate (25), and is discharged from the alkaline washing aeration hole (28) to complete the alkaline washing operation. The upper flow-guiding partition plate (22) and the lower flow-guiding partition plate (25) expand the gas passage of the pickling gas. Finally, the gas through the combined acid and alkali treatment cylinder (8) is discharged from the connecting exhaust pipe.

9. A method for purifying flue gas in a thermal power plant according to claim 8, characterized in that, While step S2 is being performed, room temperature liquid is introduced into the water supply pipe (12), enters each water inlet hose (33) through the annular water inlet pipe (30), and enters a set of guide chambers (47) in the swing mounting frame (38) through the water inlet hose (33). Then, it is guided into another set of guide chambers in the swing mounting frame (38) through each condensation auxiliary capture pipe, and then enters the annular water outlet pipe (31) through the water outlet hose (34). Finally, it 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) guides the heat absorbed by the condensation auxiliary capture pipe (43) along with the liquid into the particle settling installation cylinder (7), and the drain pipe (17) is connected to the external pipeline. The valve body is opened periodically to drain the sewage.

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