Boiler tail gas purification equipment and method

Abstract

The present invention relates to the technical field of boiler exhaust gas purification, and discloses a boiler exhaust gas purification device and method, including a filter tank, wherein the middle portion of the inner cavity of the filter tank has an ash guide cone groove, the bottom of the ash guide cone groove is provided with an ash valve plate, the top of the filter tank is expanded and the edge has a smoke collecting chamber, the lower wall of the smoke collecting chamber is installed with a filter ring, the bottom and right wall of the filter tank are respectively fixedly connected with a smoke inlet pipe and a smoke guide tube, and the top of the smoke inlet pipe is rotatably sleeved with a square sleeve that abuts against the inner wall of the filter ring. When the filter ring is blocked, the regulating component automatically controls the sealing of the bottom of the ash guide cone groove and the opening of the ash guide groove according to the feedback information of the pressure sensor, and controls the deflection of the square sleeve to switch the new filtering part of the filter ring to use, and cooperates to drive the cleaning component to automatically clean the filter ring, thereby ensuring that the exhaust gas purification is continuous and uninterrupted, and cooperates with the smoke mixing component and the C-type nozzle to increase the cracking degree of the smoke bubbles in the reaction liquid, ensuring that the reaction liquid fully absorbs the exhaust gas.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler tail gas purification, and in particular to boiler tail gas purification equipment and method. Background Art

[0002] Boilers are commonly used equipment in industry. By burning fuels such as wood and coal, a large amount of smoke and pollutant gases will be generated during the combustion process. These exhaust gases carry a lot of heat, and the smoke contains toxic gases such as sulfur dioxide and carbon monoxide. Direct emission will cause serious harm to the environment. Therefore, if production conditions permit, it is necessary to use corresponding exhaust gas purification equipment in conjunction with the boiler exhaust.

[0003] The utility model with publication number CN214345134U discloses a small exhaust gas purifier for a gas boiler that is easy to disassemble and install, including a boiler smoke pipe, a motor, a water pump and a water pipe. A delivery pipe is welded to the right side of the boiler smoke pipe, and an outer shell is provided on the right side of the boiler smoke pipe. The left side of the outer shell is fixedly connected to the motor, and the output end of the motor is connected to a rotating rod, the right end of the rotating rod is connected to a cleaning plate, and a transition plate is provided on the right side of the baffle plate. A purification plate is installed at the right end of the inner part of the outer shell, and the right side of the purification plate is fixedly connected to a shell cover by screws. A water pump is provided below the outer shell, and the input end of the water pump is connected to a water pipe; the utility model with publication number CN218485491U discloses a high-efficiency dust removal tower for boiler exhaust gas purification, including a dust removal tower body, a dust removal assembly and a stabilizing assembly. The dust removal assembly includes a rotating shaft movably installed at the top of the inner top of the dust removal tower body, and a rotating frame fixedly installed at the bottom of the rotating shaft.

[0004] When the boiler exhaust purifier in the above patent is in use, once the baffle plate is saturated with filtration, the equipment needs to be shut down and the dust on the baffle plate needs to be cleaned using the built-in cleaning plate. The shutdown cleaning often affects the use of the boiler. At the same time, the dust cleaned falls on the bottom of the corresponding filter chamber and needs to be taken out with tools or manually, which makes dust handling inconvenient. The cleaning plate is always on the surface of the baffle plate, which not only hinders the flow of exhaust gas, but is also easily damaged by high-temperature flue gas and adheres to dust, resulting in a shortened subsequent service life and poor cleaning effect. When the boiler exhaust purification tower is in use, multiple air holes are opened on the vortex tube, and the exhaust gas is discharged into the treatment liquid or water through these air holes, and the bubbles are punctured by a stirring mechanism driven by rotation, thereby enhancing the reaction absorption of the exhaust gas. However, in fact, the stirring mechanism needs to run at high speed, and the tail bubbles will also reduce the puncture and decomposition effect as the water flows. This treatment method has limited absorption effect on exhaust gas and insufficient exhaust gas treatment. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems of general boiler exhaust gas purification equipment in use, such as easy interruption of purification after filtration saturation, inability to clean online, and insufficient exhaust gas purification absorption. The present invention provides a boiler exhaust gas purification equipment and method.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A boiler exhaust gas purification device comprises a filter tank, wherein the middle part of the inner cavity of the filter tank is provided with an ash guide cone groove, the bottom of the ash guide cone groove is provided with an ash passing valve plate, the top of the filter tank is expanded and the edge is provided with a smoke collecting chamber, the lower wall of the smoke collecting chamber is installed with a filter ring, the bottom and right wall of the filter tank are respectively fixedly plugged with a smoke inlet pipe and a smoke guide tube, the top of the smoke inlet pipe is rotatably sleeved with a square sleeve that abuts against the inner wall of the filter ring, the left end of the square sleeve is fixedly connected with a sealing ring sleeved on the outer periphery of the filter ring, the left end of the front wall of the square sleeve is provided with an ash passing groove and the front wall is slidably connected to a sealing plate, the square sleeve is provided with an adjustment component for controlling self-rotation and sealing of the sealing plate and the ash passing valve plate, a pressure sensor is provided at the top of the inner cavity of the square sleeve and a cleaning component is provided on the front side;

[0008] It also includes an absorption tank, the top of which is fixedly connected to a smoke exhaust filter tube, the bottom of the inner cavity of the absorption tank is fixedly connected to a C-shaped nozzle, and the outer end of the C-shaped nozzle is provided with a smoke mixing component for mixing smoke and liquid.

[0009] Furthermore, an ash receiving box is slidably plugged into the left wall of the bottom of the filter tank, the ash guide cone groove is inclined, and the bottom port is retracted and located above the ash receiving box.

[0010] Furthermore, the ash passing valve plate is located between the ash guide cone groove and the ash receiving box, the ash passing valve plate is rotatably sleeved on the smoke inlet pipe, and the left side of the ash passing valve plate has a valve port corresponding to the bottom port of the ash guide cone groove.

[0011] Furthermore, the adjusting assembly includes a guide groove 1 provided on the front wall of the sealing plate, the guide groove 1 being composed of a vertical groove 1 at the bottom and an oblique groove 1 at the top in communication with each other, a jacket being slidably engaged with the periphery of the square sleeve, a pin protrusion 1 being movably engaged with the guide groove 1 being provided on the inner wall of the jacket, a cone head insert disk being slidably engaged with the outer wall of the square sleeve being fixedly connected to the top of the jacket, a telescopic cylinder being fixedly connected between the top of the square sleeve and the cone head insert disk, a clamping tube being slidably engaged with the cone head insert disk being fixedly connected to the top of the square sleeve, an insulating piston being slidably engaged with the top of the inner cavity of the square sleeve, a pressure sensor 1 being fixedly connected between the insulating piston and the upper wall of the inner cavity of the square sleeve, and the pressure sensor 1 being electrically connected to the telescopic cylinder;

[0012] A mounting bracket is provided on the top of the filter tank, and a friction worm gear coaxial with the cone head insert disk is rotatably connected to the middle of the mounting bracket. A driving worm engaged with the friction worm gear is rotatably connected to the rear side of the top of the mounting bracket. The driving worm is driven by a motor installed on the left wall of the mounting bracket, and a friction cone groove adapted to the top of the cone head insert disk is provided at the bottom of the friction worm gear.

[0013] Furthermore, the upper and lower walls of the sealing ring are respectively in movable sealing contact with the upper and lower walls of the smoke collecting chamber.

[0014] Furthermore, the adjustment assembly also includes a rotating tube rotatably sleeved on the smoke inlet pipe, the ash valve plate is fixedly connected to the bottom of the rotating tube, the rotating tube is movably sealed and inserted in the middle of the filter tank, and a guide groove 2 is provided on the front wall of the rotating tube, and the guide groove 2 is composed of an arc groove inclined upward at the bottom and a vertical groove 2 at the top. The vertical distance between the two ends of the arc groove is equal to the length of the two ends of the vertical groove 1, and an adjustment ring sleeved on the rotating tube is slidably engaged on the outer periphery of the top of the smoke inlet pipe, and a pin protrusion 2 movably engaged with the guide groove 2 is provided on the front wall of the inner cavity of the adjustment ring, and the adjustment ring is rotatably connected to the inner wall of the jacket.

[0015] Furthermore, the adjustment assembly also includes a wedge plate fixedly connected to the right wall of the square sleeve, and four pressure sensors 2 arranged in a circumferential manner are fixedly connected to the inner wall of the top of the filter tank. The wedge plate is movably abutted against the pressure sensor 2 on the right side, and the pressure sensor 2 can feedback control the contraction of the telescopic cylinder.

[0016] Furthermore, the cleaning assembly includes an adjusting disk rotatably connected to the top of the inner cavity of the filter tank, the bottom of the adjusting disk is rotatably connected to a toothed brush roller near the front side of the square sleeve, the inner wall of the top of the filter tank is provided with a tooth groove corresponding to the toothed brush roller, a traction spring is fixedly connected between the adjusting disk and the wedge plate, a wedge groove is provided on the front side of the adjusting disk, and four elastic wedge blocks in a circumferential array are slidably engaged with the inner wall of the top of the filter tank, the elastic wedge block on the front side is engaged with the wedge groove, the wedge plate can squeeze the elastic wedge block, and the elastic wedge block is adjacent to the second pressure sensor.

[0017] Furthermore, the smoke mixing assembly includes a U-shaped circulation pipe fixedly inserted on the left wall of the absorption tank, the right end of the driving worm extends into the U-shaped circulation pipe and is fixedly sleeved with an impeller, the bottom of the U-shaped circulation pipe is fixedly connected to the C-shaped nozzle, the smoke guide tube is fixedly sleeved on the U-shaped circulation pipe, and a contraction section is provided on the U-shaped circulation pipe. The bottom of the smoke guide tube is fixedly connected to a plurality of one-way valve tubes obliquely inserted in a circular array on the contraction section, the extension line of the bottom end of the one-way valve tube does not intersect with the axis of the contraction section, the left wall of the contraction section is fixedly connected to an L-shaped one-way suction pipe extending into the ash guide cone groove, a spiral leaf is fixedly connected in the absorption tank, and an activated carbon column is installed in the smoke exhaust filter tube.

[0018] A method for purifying boiler tail gas comprises the following steps:

[0019] S1. Boiler exhaust gas is introduced into the smoke inlet pipe and discharged through the square sleeve, where dust is filtered out by the filter ring. When dust blocks the corresponding portion of the filter ring, the exhaust gas pressure inside the square sleeve increases. The regulating component controls the ash-passing valve plate to first seal the bottom of the ash-guiding cone groove and then controls the sealing plate to open the ash-passing groove based on feedback from the first pressure sensor.

[0020] S2. The adjustment component controls the square sleeve to deflect 90 degrees clockwise, switching the filter ring to a new filter portion for use. Subsequently, the cleaning component automatically cleans the clogged inner wall of the filter ring, and the cleaned dust falls into the ash guide cone groove;

[0021] S3. The exhaust gas filtered by the filter ring is discharged into the smoke collecting chamber and discharged into the smoke mixing component by the smoke guide pipe. The exhaust gas and the treatment liquid are fully mixed and reacted to be absorbed. The solution after the mixed reaction is output by the C-type nozzle and sprayed into the absorption tank, thereby increasing the cracking of bubbles and further enhancing the absorption of the treatment liquid to the smoke. The subsequently purified smoke is filtered and absorbed again by the smoke exhaust filter tube and then released.

[0022] The beneficial effects of the present invention are as follows:

[0023] When the filter ring of the present invention reaches the blockage standard, the regulating component automatically controls the bottom seal of the ash guide cone groove and opens the ash trough according to the feedback information of the pressure sensor 1, and controls the deflection of the square sleeve to switch the new filtering part of the filter ring for use, and cooperates to drive the cleaning component to automatically clean the blocked part of the filter ring, thereby ensuring continuous and uninterrupted exhaust gas purification.

[0024] The present invention seals the ash trough by the sealing plate during normal exhaust gas filtering, thereby preventing smoke leakage. During online cleaning, although the ash trough is open, the bottom of the ash guide cone groove is sealed, and the smoke mixing component sucks the smoke in the ash guide cone groove, thereby also preventing smoke leakage. The dust discharged from the ash guide cone groove can be cleaned at any time, which is safe and convenient. In addition, since the cleaning component is outside the square sleeve, the continuous high-temperature damage of the smoke to the cleaning component and the adhesion of dust are avoided, thereby extending its service life and ensuring the subsequent cleaning effect.

[0025] After the dust in the tail gas is filtered by the filter ring, the tail gas is passed into the smoke mixing component and the absorption tank. The smoke mixing component and the C-type nozzle output are used to increase the cracking degree of the smoke bubbles in the reaction liquid, ensuring that the reaction liquid fully absorbs the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional structural diagram of the purification equipment of the present invention;

[0027] Figure 2 This is an exploded view of the filter tank and square sleeve portion of the purification equipment of the present invention;

[0028] Figure 3 It is an exploded view of the jacketed square casing portion of the purification equipment of the present invention;

[0029] Figure 4 This is a partial three-dimensional cutaway view of the filter tank and filter ring of the purification equipment of the present invention;

[0030] Figure 5 It is a partial three-dimensional cutaway view of the filter tank and the sealing ring of the purification equipment of the present invention;

[0031] Figure 6 This is a partial three-dimensional cutaway view of the filter tank and square sleeve of the purification equipment of the present invention;

[0032] Figure 7 This is a partial three-dimensional cutaway view of the square sleeve and sealing ring of the purification equipment of the present invention;

[0033] Figure 8 It is a partial three-dimensional cutaway view of the absorption tank and U-shaped circulation pipe of the purification equipment of the present invention.

[0034] Reference numerals: 1, filter tank; 11, filter ring; 12, ash box; 13, smoke inlet pipe; 14, smoke guide tube; 15, friction worm gear; 16, driving worm; 17, impeller; 2, rotating tube; 21, ash valve plate; 22, guide groove 2; 23, adjusting ring; 24, pin convex 2; 3, square sleeve; 31, sealing ring; 32, sealing plate; 33, guide groove 1; 34, jacket; 35, pin convex 1; 36, cone Head plug disk; 37, telescopic cylinder; 38, wedge plate; 39, pressure sensor 2; 4, adiabatic piston; 41, pressure sensor 1; 5, adjusting disk; 51, tooth head brush roller; 52, traction spring; 53, elastic wedge; 6, absorption tank; 61, smoke exhaust filter tube; 62, activated carbon column; 63, spiral leaf; 64, U-shaped circulation tube; 65, C-shaped nozzle; 66, one-way valve tube; 67, L-shaped one-way suction tube. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Example 1, as Figures 1-8 As shown, a boiler exhaust gas purification device includes a filter tank 1, an ash guide cone groove is provided in the middle of the inner cavity of the filter tank 1, an ash passing valve plate 21 is provided at the bottom of the ash guide cone groove, the top of the filter tank 1 is expanded and the edge has a smoke collecting chamber, and a filter ring 11 is installed on the lower wall of the smoke collecting chamber, and a smoke inlet pipe 13 and a smoke guide tube 14 are fixedly inserted at the bottom and right wall of the filter tank 1 respectively. A square sleeve 3 that abuts the inner wall of the filter ring 11 is rotatably sleeved on the top of the smoke inlet pipe 13, and a sealing ring 31 that is sleeved on the outer periphery of the filter ring 11 is fixedly connected to the left end of the square sleeve 3. The upper and lower walls of the sealing ring 31 are respectively movably sealed against the upper and lower walls of the smoke collecting chamber, an ash passing groove is provided at the left end of the front wall of the square sleeve 3, and a sealing plate 32 is slidably connected to the front wall. An adjustment component for controlling rotation and sealing the sealing plate 32 and the ash passing valve plate 21 is provided on the square sleeve 3. A pressure sensor 41 is provided on the top of the inner cavity of the square sleeve 3 and a cleaning component is provided on the front side;

[0037] It also includes an absorption tank 6, a smoke exhaust filter tube 61 is fixedly inserted on the top of the absorption tank 6, a C-shaped nozzle 65 is fixedly connected to the bottom of the inner cavity of the absorption tank 6, and a smoke mixing component for mixing smoke and liquid is provided at the outer end of the C-shaped nozzle 65.

[0038] An ash receiving box 12 is slidably inserted into the left wall of the bottom of the filter tank 1. The ash guide cone groove is inclined and the bottom port is retracted above the ash receiving box 12. The ash valve plate 21 is between the ash guide cone groove and the ash receiving box 12. The ash valve plate 21 is rotatably sleeved on the smoke inlet pipe 13. The left side of the ash valve plate 21 has a valve port corresponding to the bottom port of the ash guide cone groove.

[0039] When purifying boiler tail gas, the boiler tail gas is introduced into the square sleeve 3 through the smoke inlet pipe 13, and the square sleeve 3 outputs the tail gas to the smoke collecting chamber. During this period, the dust is filtered out when the tail gas passes through the filter ring 11. The filtered tail gas is discharged from the smoke collecting chamber through the smoke guide tube 14 into the smoke mixing component. The smoke mixing component controls the tail gas and the treatment liquid to be fully mixed so that the tail gas is absorbed. The solution after the mixed reaction is output by the C-type nozzle 65 and sprayed into the absorption tank 6, thereby increasing the decomposition of the tail bubbles, making the contact between the tail gas and the treatment liquid more complete, and further strengthening the absorption of the tail gas by the treatment liquid. The subsequently purified tail gas is filtered and absorbed again by the smoke exhaust filter pipe 61 and then released without pollution.

[0040] When the filter ring 11 is saturated and blocked to the corresponding standard, the exhaust pressure inside the square sleeve 3 increases, and the pressure sensor 41 feedback controls the regulating component to drive the ash valve plate 21 to deflect and seal the bottom of the ash guide cone groove to prevent exhaust leakage during subsequent cleaning. The regulating component then controls the sealing plate 32 to move right to open the ash groove, making it easier for the dust to be exposed when the square sleeve 3 deflects. Then the regulating component controls the square sleeve 3 to deflect 90 degrees clockwise ( Figure 2 The exhaust gas discharged from the square sleeve 3 is continuously output to the smoke collecting chamber through the new filtering part of the filter ring 11, which does not affect the normal purification of the exhaust gas. The sealing ring 31 continuously adjusts the sealing area of the filter ring 11 as the square sleeve 3 rotates to ensure that the square sleeve 3 exhausts smoke stably and the exhaust gas in the smoke collecting chamber will not be backflowed into the ash guide cone groove through the part other than the square sleeve 3 outlet, causing greater disturbance to the dust cleaned in the ash guide cone groove. When the square sleeve 3 rotates 90 degrees and stops, the cleaning component is driven to clean the inner wall of the blocked part of the filter ring 11 corresponding to the deflection path of the outlet of the opposite sleeve 3, and the cleaned dust falls into the sealed ash guide cone groove at the bottom. During this period, a small amount of exhaust gas passes through the front of the square sleeve 3 The ash trough on the wall enters the ash guide cone groove, but the smoke mixing component automatically extracts this part of the exhaust gas for purification, which means that when the subsequent sealing plate 32 is reset to seal the ash trough and the ash valve plate 21 is reset to open the bottom of the ash guide cone groove, there will be no exhaust gas leakage, and when the dust in the ash guide cone groove is released into the ash receiving box 12, the relevant personnel will not absorb the exhaust gas, ensuring physical and mental health. The dust discharged from the ash guide cone groove can be cleaned at any time, which is safe and convenient. When the filter ring 11 is blocked, the adjustment component can cooperate with the cleaning component to automatically realize online cleaning of the filter ring 11, thereby ensuring continuous and uninterrupted exhaust gas purification. In addition, since the cleaning component is outside the square sleeve 3, it avoids continuous high-temperature damage to the cleaning component by flue gas and dust adhesion, extends its service life, and ensures subsequent cleaning effects.

[0041] Embodiment 2, on the basis of the above embodiment, the adjustment component includes a guide groove 1 33 provided on the front wall of the sealing plate 32, the guide groove 1 33 is composed of a vertical groove 1 at the bottom and an oblique groove at the top, a jacket 34 is slidably engaged with the outer periphery of the square sleeve 3, the inner wall of the jacket 34 is provided with a pin protrusion 1 35 movably engaged with the guide groove 1 33, the top of the jacket 34 is fixedly connected to a cone head insert disk 36 slidably engaged with the outer wall of the square sleeve 3, a telescopic cylinder 37 is fixedly connected between the top of the square sleeve 3 and the cone head insert disk 36, a clamping tube is fixedly connected to the top of the square sleeve 3 to slide with the cone head insert disk 36, an insulating piston 4 is slidably engaged with the top of the inner cavity of the square sleeve 3, a pressure sensor 1 41 is fixedly connected between the insulating piston 4 and the upper wall of the inner cavity of the square sleeve 3, and the pressure sensor 1 41 is electrically connected to the telescopic cylinder 37.

[0042] When the filter ring 11 is saturated and blocked to the corresponding standard, the exhaust pressure inside the square sleeve 3 increases. The adiabatic piston 4 protects the pressure sensor 41 from high temperature damage, while squeezing the pressure sensor 41 and causing the pressure sensor 41 to feedback and control the telescopic cylinder 37 to extend, driving the cone head insert 36 to move upward, and the cone head insert 36 thereby drives the jacket 34 to move upward. When the pin protrusion 35 on the inner wall of the jacket 34 moves upward along the guide groove 33 and squeezes the inclined groove therein upward, the sealing plate 32 is driven to move right to open the ash trough, so as to expose the dust blocked on the inner wall of the filter ring 11 after the subsequent deflection of the square sleeve 3.

[0043] A mounting bracket is provided on the top of the filter tank 1, and a friction worm gear 15 coaxial with the cone head insert disk 36 is rotatably connected to the middle of the mounting bracket. A driving worm 16 meshing with the friction worm gear 15 is rotatably connected to the rear side of the top of the mounting bracket. The driving worm 16 is driven by a motor installed on the left wall of the mounting bracket, and a friction cone groove adapted to the top of the cone head insert disk 36 is provided at the bottom of the friction worm gear 15.

[0044] When the equipment is in use, the motor drives the driving worm 16 to make the friction worm gear 15 continue to operate. When the telescopic cylinder 37 extends and drives the cone head insert disc 36 to move up to the maximum distance, the cone head insert disc 36 just abuts against the friction cone groove at the bottom of the friction worm gear 15. The cone head insert disc 36 is thereby driven to deflect, and cooperates with the clamping tube to limit the deflection of the cone head insert disc 36 relative to the square sleeve 3. The cone head insert disc 36 thereby stably drives the square sleeve 3 to deflect, so as to switch different filtering parts of the filter ring 11 for use.

[0045] Embodiment three, on the basis of the above embodiment, the adjustment component also includes a rotating tube 2 rotatably sleeved on the smoke inlet pipe 13, the ash valve plate 21 is fixedly connected to the bottom of the rotating tube 2, the rotating tube 2 is movably sealed and inserted in the middle of the filter tank 1, and a guide groove 22 is provided on the front wall of the rotating tube 2. The guide groove 22 is composed of an arc groove inclined upward at the bottom and a vertical groove 2 at the top. The vertical distance between the two ends of the arc groove is equal to the length of the two ends of the vertical groove 1. The outer periphery of the top of the smoke inlet pipe 13 is slidably clamped with an adjustment ring 23 sleeved on the rotating tube 2. The front wall of the inner cavity of the adjustment ring 23 is provided with a pin protrusion 24 movably clamped with the guide groove 22. The adjustment ring 23 is rotatably connected to the inner wall of the jacket 34.

[0046] Initially, the second pin protrusion 24 is movably engaged with the bottom of the second guide groove 22, and the first pin protrusion 35 is movably engaged with the bottom of the first guide groove 33. When the sleeve 34 is driven to move upward, the sleeve 34 drives the adjusting ring 23 to move upward synchronously, and the adjusting ring 23 drives the second pin protrusion 24 to squeeze the arc groove in the second guide groove 22 upward, and the sleeve 34 drives the first pin protrusion 35 to move upward along the vertical groove 1 in the guide groove 1 33. Since the vertical distance between the two ends of the arc groove is equal to the length of the two ends of the vertical groove 1, the rotating pipe 2 is driven to make the ash valve plate 21 deflect first to seal the bottom of the ash guide cone groove. Subsequently, when the pin protrusion 1 35 squeezes the inclined groove and the pin protrusion 24 moves upward along the vertical groove 2, the sealing plate 32 is driven to open the ash guide groove, thereby ensuring that the bottom of the ash guide cone groove is sealed first during the use of the filtering part of the switching filter ring 11 and the cleaning of the dust on the inner wall of the filter ring 11 to prevent smoke from leaking out.

[0047] Embodiment 4, based on the above embodiment, the adjustment component also includes a wedge plate 38 fixedly connected to the right wall of the square sleeve 3, and four pressure sensors 2 39 arranged in a circumferential manner are fixedly connected to the inner wall of the top of the filter tank 1. The wedge plate 38 is movably abutted against the right pressure sensor 2 39, and the pressure sensor 2 39 can feedback control the contraction of the telescopic cylinder 37.

[0048] When the square sleeve 3 deflects ninety degrees, the wedge plate 38 synchronously abuts against the next pressure sensor 2 39, and the pressure sensor 2 39 thereby feedback controls the telescopic cylinder 37 to contract, thereby driving the sealing plate 32 to first move left and reset to seal the ash trough, preventing the exhaust gas from continuing to leak into the ash guide cone groove, and then driving the ash valve plate 21 to reset and open the bottom outlet of the ash guide cone groove, thereby facilitating the subsequent automatic and stable release of the cleaned dust into the ash receiving box 12.

[0049] Example five, based on the above example, the cleaning component includes an adjusting disk 5 rotatably connected to the top of the inner cavity of the filter tank 1, and the bottom of the adjusting disk 5 is rotatably connected to the front side of the square sleeve 3. A tooth groove corresponding to the tooth brush roller 51 is provided on the inner wall of the top of the filter tank 1, and a traction spring 52 is fixedly connected between the adjusting disk 5 and the wedge plate 38. A wedge groove is provided on the front side of the adjusting disk 5. Four elastic wedge blocks 53 in a circumferential array are slidably engaged with the inner wall of the top of the filter tank 1, and the front elastic wedge block 53 is engaged with the wedge groove. The wedge plate 38 can squeeze the elastic wedge block 53, and the elastic wedge block 53 is adjacent to the pressure sensor 2 39.

[0050] When the square sleeve 3 drives the wedge plate 38 to deflect, the adjusting disk 5 is limited by the engagement of the elastic wedge block 53 and does not deflect, but the traction spring 52 is stretched. When the square sleeve 3 drives the wedge plate 38 to rotate ninety degrees and stop, the wedge plate 38 just squeezes through and drives the elastic wedge block 53 engaged with the wedge groove to contract. The adjusting disk 5 loses its limit and deflects rapidly under the pull of the traction spring 52 until the wedge groove is engaged with the next elastic wedge block 53. The corresponding tooth head brush roller 51 is driven to engage with the tooth groove and rotate rapidly, cleaning the dust on the inner wall of the filter ring 11, thereby improving the cleaning effect.

[0051] Example 6. On the basis of the above examples, the smoke mixing component includes a U-shaped circulation pipe 64 fixedly inserted on the left wall of the absorption tank 6, the right end of the driving worm 16 extends into the U-shaped circulation pipe 64 and is fixedly sleeved with an impeller 17, the bottom of the U-shaped circulation pipe 64 is fixedly connected to the C-shaped nozzle 65, the smoke guide tube 14 is fixedly sleeved on the U-shaped circulation pipe 64, and the U-shaped circulation pipe 64 is provided with a contraction section. The bottom of the smoke guide tube 14 is fixedly connected to a plurality of one-way valve tubes 66 obliquely inserted in a circular array on the contraction section, the extension line of the bottom end of the one-way valve tube 66 does not intersect with the axis of the contraction section, the left wall of the contraction section is fixedly connected to an L-shaped one-way suction pipe 67 extending into the ash guide cone groove, a spiral leaf 63 is fixedly connected in the absorption tank 6, and an activated carbon column 62 is installed in the smoke exhaust filter tube 61.

[0052] When the worm 16 is driven to rotate, the impeller 17 is driven to rotate continuously. The impeller 17 extracts the reaction liquid in the absorption tank 6 from the top and transports it to the bottom of the absorption tank 6 through the U-shaped circulation pipe 64 and the C-shaped nozzle 65 for circulation. When the reaction liquid passes through the contraction section of the U-shaped circulation pipe 64, the flow rate becomes faster due to the negative pressure. Accordingly, the exhaust gas discharged from the smoke guide pipe 14 is quickly sucked in through the one-way valve pipe 66, thereby enhancing the exhaust gas circulation effect and reducing the escape of the exhaust gas through the ash trough and the ash cone trough.

[0053] The tail gas sucked through the one-way valve tube 66 enters the contraction section and mixes with the reaction liquid. At the same time, due to the oblique connection of the one-way valve tube 66 and the fact that the extension line of the bottom end does not intersect with the axis of the contraction section, the gas-liquid mixture automatically generates a high-speed swirl, and forms a shear force to shear and crush the tail bubbles, thereby increasing the contact area between the tail gas and the reaction liquid and strengthening the reaction. The solution after the mixed reaction is output through the C-type nozzle 65 for counter-spraying, thereby increasing the collision and cracking of the tail bubbles, and making the contact between the tail gas and the treatment liquid more complete. The purified tail gas subsequently discharged into the absorption tank 6 increases its movement distance of the escaping reaction liquid after being guided by the spiral blades 63, further strengthening the absorption of the tail gas by the treatment liquid. The purified tail gas is finally filtered and absorbed by the activated carbon column 62 in the smoke filter tube 61 and released without pollution.

[0054] During this period, due to the negative pressure at the contraction section, the L-shaped one-way suction pipe 67 can continuously assist in absorbing the tail gas entering the ash guide cone groove and passing it into the treatment liquid for purification, and the dust collection and treatment using the ash box 12 is safe and reliable.

[0055] Example 7, based on the above example, provides a boiler tail gas purification method, comprising the following steps:

[0056] S1. Boiler exhaust gas is introduced through the smoke inlet pipe 13 and discharged through the square sleeve 3. Dust is filtered out by the filter ring 11. When dust blocks the corresponding part of the filter ring 11, the exhaust gas pressure inside the square sleeve 3 increases. The regulating component controls the ash valve plate 21 to seal the bottom of the ash guide cone groove based on the feedback information of the pressure sensor 41, and then controls the sealing plate 32 to open the ash groove.

[0057] S2, the adjustment component controls the square sleeve 3 to deflect 90 degrees clockwise, switching the filter ring 11 to a new filtering part for use, and the subsequent cleaning component automatically cleans the clogged inner wall of the filter ring 11, and the cleaned dust falls into the ash guide cone groove;

[0058] S3. The exhaust gas filtered by the filter ring 11 is discharged into the smoke collecting chamber and discharged into the smoke mixing component by the smoke guide tube 14. The exhaust gas and the treatment liquid are fully mixed and reacted to be absorbed. The solution after the mixed reaction is output by the C-type nozzle 65 and sprayed into the absorption tank 6, thereby increasing the decomposition of bubbles and further enhancing the absorption of the smoke by the treatment liquid. The subsequently purified smoke is filtered and absorbed again by the smoke exhaust filter tube 61 and then released.

[0059] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A boiler tail gas purification device, comprising a filter tank (1), characterized in that: The filter tank (1) has an ash guide cone groove in the middle of its inner cavity, an ash passing valve plate (21) is provided at the bottom of the ash guide cone groove, and a valve port corresponding to the bottom port of the ash guide cone groove is provided on the left side of the ash passing valve plate (21). The top of the filter tank (1) is expanded and has a smoke collecting cavity at its edge, a filter ring (11) is installed on the lower wall of the smoke collecting cavity, a smoke inlet pipe (13) and a smoke guide tube (14) are fixedly connected to the bottom and right wall of the filter tank (1), respectively, and the top of the smoke inlet pipe (13) is rotatably sleeved with a filter ring (11) 11) a square sleeve (3) abutting against the inner wall, the left end of the square sleeve (3) is fixedly connected to a sealing ring (31) sleeved on the outer periphery of the filter ring (11), the left end of the front wall of the square sleeve (3) has an ash groove and the front wall is slidably connected to a sealing plate (32), the square sleeve (3) is provided with an adjustment component for controlling the rotation and the sealing of the sealing plate (32) and the ash valve plate (21), the top of the inner cavity of the square sleeve (3) is provided with a pressure sensor (41) and the front side is provided with a cleaning component; It also includes an absorption tank (6), a smoke exhaust filter tube (61) fixedly connected to the top of the absorption tank (6), a C-shaped nozzle (65) fixedly connected to the bottom of the inner cavity of the absorption tank (6), and a smoke mixing component for mixing smoke and liquid is provided at the outer end of the C-shaped nozzle (65); The adjustment component includes a guide groove (33) provided on the front wall of the sealing plate (32), the guide groove (33) being composed of a vertical groove (3) at the bottom and an inclined groove (34) at the top, the outer periphery of the square sleeve (3) being slidably engaged with a jacket (34), the inner wall of the jacket (34) being provided with a pin protrusion (35) movably engaged with the guide groove (33), the top of the jacket (34) being fixedly connected with a cone head insert (36) slidably engaged with the outer wall of the square sleeve (3), a telescopic cylinder (37) being fixedly connected between the top of the square sleeve (3) and the cone head insert (36), and the top of the square sleeve (3) being fixedly connected with a clamping pipe slidably engaged with the cone head insert (36); A mounting frame is provided on the top of the filter tank (1); a friction worm gear (15) coaxial with the cone head insert (36) is rotatably connected to the middle of the mounting frame; and a driving worm (16) meshing with the friction worm gear (15) is rotatably connected to the rear side of the top of the mounting frame. The adjustment component also includes a rotating tube (2) rotatably sleeved on the smoke inlet pipe (13), the ash valve plate (21) is fixedly connected to the bottom of the rotating tube (2), the rotating tube (2) is movably sealed and plugged into the middle of the filter tank (1), and a guide groove 2 (22) is provided on the front wall of the rotating tube (2), the guide groove 2 (22) is composed of an arc groove inclined upward at the bottom and a vertical groove 2 at the top, and the vertical distance between the two ends of the arc groove is equal to the length of the two ends of the vertical groove 1. The outer periphery of the top of the smoke inlet pipe (13) is slidably engaged with an adjustment ring (23) sleeved on the rotating tube (2), and the front wall of the inner cavity of the adjustment ring (23) is provided with a pin protrusion 2 (24) movably engaged with the guide groove 2 (22), and the adjustment ring (23) is rotatably connected to the inner wall of the jacket (34).

2. The boiler tail gas purification equipment according to claim 1, characterized in that: An ash receiving box (12) is slidably inserted into the left wall of the bottom of the filter tank (1); the ash guide cone groove is inclined and the bottom port is contracted and located above the ash receiving box (12).

3. The boiler tail gas purification equipment according to claim 2, characterized in that: The ash passing valve plate (21) is located between the ash guide cone groove and the ash receiving box (12), and the ash passing valve plate (21) is rotatably sleeved on the smoke inlet pipe (13).

4. The boiler tail gas purification equipment according to claim 3, characterized in that: The top of the inner cavity of the square sleeve (3) is slidably connected with an insulating piston (4), the pressure sensor 1 (41) is fixedly connected between the insulating piston (4) and the upper wall of the inner cavity of the square sleeve (3), and the pressure sensor 1 (41) is electrically connected to the telescopic cylinder (37); The driving worm (16) is driven by a motor mounted on the left wall of the mounting frame, and a friction cone groove adapted to the top of the cone head insert (36) is provided at the bottom of the friction worm gear (15).

5. The boiler tail gas purification equipment according to claim 4, characterized in that: The upper and lower walls of the sealing ring (31) are in movable sealing contact with the upper and lower walls of the smoke collecting chamber, respectively.

6. The boiler tail gas purification equipment according to claim 5, characterized in that: The adjustment assembly further comprises a wedge plate (38) fixedly connected to the right wall of the square sleeve (3); four pressure sensors (39) arranged circumferentially are fixedly connected to the inner wall of the top of the filter tank (1); the wedge plate (38) is movably abutted against the pressure sensor (39) on the right side; the pressure sensor (39) can feedback control the contraction of the telescopic cylinder (37).

7. The boiler tail gas purification equipment according to claim 6, characterized in that: The cleaning assembly includes an adjusting disk (5) rotatably connected to the top of the inner cavity of the filter tank (1), the bottom of the adjusting disk (5) is rotatably connected to a tooth head brush roller (51) near the front side of the square sleeve (3), the inner wall of the top of the filter tank (1) is provided with a tooth groove corresponding to the tooth head brush roller (51), a traction spring (52) is fixedly connected between the adjusting disk (5) and the wedge plate (38), a wedge groove is provided on the front side of the adjusting disk (5), and four elastic wedge blocks (53) in a circumferential array are slidably engaged with the inner wall of the top of the filter tank (1), the elastic wedge block (53) on the front side is engaged with the wedge groove, the wedge plate (38) can squeeze the elastic wedge block (53), and the elastic wedge block (53) is adjacent to the second pressure sensor (39).

8. The boiler tail gas purification equipment according to claim 7, characterized in that: The smoke mixing assembly includes a U-shaped circulation pipe (64) fixedly plugged into the left wall of the absorption tank (6), the right end of the driving worm (16) extends into the U-shaped circulation pipe (64) and is fixedly sleeved with an impeller (17), the bottom of the U-shaped circulation pipe (64) is fixedly connected to the C-shaped nozzle (65), the smoke guide tube (14) is fixedly sleeved on the U-shaped circulation pipe (64), the U-shaped circulation pipe (64) is provided with a contraction section, the bottom of the smoke guide tube (14) is fixedly connected to a plurality of one-way valve pipes (66) obliquely plugged into a circular array on the contraction section, the extension line of the bottom end of the one-way valve pipe (66) does not intersect with the axis of the contraction section, the left wall of the contraction section is fixedly connected to an L-shaped one-way suction pipe (67) extending into the ash guide cone groove, a spiral leaf (63) is fixedly connected to the absorption tank (6), and an activated carbon column (62) is installed in the smoke exhaust filter pipe (61).

9. A method for purifying boiler tail gas, using a boiler tail gas purification device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Boiler tail gas is introduced through the smoke inlet pipe (13), discharged through the square sleeve (3), and dust is filtered out by the filter ring (11). When dust blocks the corresponding part of the filter ring (11), the tail gas pressure inside the square sleeve (3) increases. The regulating component controls the ash-passing valve plate (21) to seal the bottom of the ash-guiding cone groove first, and then controls the sealing plate (32) to open the ash-passing groove according to the feedback information of the pressure sensor 1 (41); S2, the regulating component controls the square sleeve (3) to deflect ninety degrees clockwise, switches the filter ring (11) to a new filter part for use, and then the cleaning component automatically cleans the clogged inner wall of the filter ring (11), and the cleaned dust falls into the ash guide cone groove; S3. The tail gas filtered by the filter ring (11) is discharged into the smoke collecting chamber and discharged into the smoke mixing component by the smoke guide tube (14). The tail gas and the treatment liquid are fully mixed and reacted to be absorbed. The solution after the mixed reaction is output by the C-type nozzle (65) and sprayed into the absorption tank (6), thereby increasing the decomposition of bubbles and further strengthening the absorption of the smoke by the treatment liquid. The subsequently purified smoke is filtered and absorbed again by the smoke exhaust filter tube (61) and then released.

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