Boiler tail gas purification equipment and method

Abstract

The invention relates to the technical field of boiler tail gas purification and discloses boiler tail gas purification equipment and method.The boiler tail gas purification equipment comprises a filtering tank, an ash guide conical groove is formed in the middle of an inner cavity of the filtering tank, an ash passing valve plate is arranged at the bottom of the ash guide conical groove, the top of the filtering tank expands, a smoke collecting cavity is formed in the edge of the filtering tank, and a filtering ring is installed on the lower wall of the smoke collecting cavity; a smoke inlet pipe and a smoke guide barrel are fixedly inserted into the bottom and the right wall of the filtering tank respectively, and the top of the smoke inlet pipe is rotationally sleeved with a square sleeve abutting against the inner wall of the filtering ring. When a filter ring is blocked, an adjusting assembly automatically controls the bottom of an ash guide conical groove to be sealed and an ash passing groove to be opened according to feedback information of a first pressure sensor, a square sleeve is controlled to deflect to switch a new filtering part of the filter ring for use, and a cleaning assembly is cooperatively driven to automatically clean the filter ring, so that continuous and uninterrupted tail gas purification is guaranteed; the smoke mixing assembly and the C-shaped spray pipe are matched to increase the cracking degree of smoke bubbles in the reaction liquid, so that sufficient absorption of the reaction liquid to the tail gas is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler tail gas purification, and particularly relates to a boiler tail gas purification device and method. Background Art

[0002] Boilers are commonly used equipment in industry. During the combustion process of burning fuels such as wood and coal, a large amount of soot and polluting gases are generated. These tail gases carry a large amount of heat, and the soot contains toxic gases such as sulfur dioxide and carbon monoxide. Direct emission will cause serious harm to the environment. Therefore, when production conditions permit, corresponding tail gas purification equipment needs to be used in conjunction with boiler tail gases.

[0003] The utility model with the publication number CN214345134U discloses a small tail gas purifier for a gas boiler that is easy to disassemble and install, including a boiler flue pipe, a motor, a water pump and a water pipe. The right side of the boiler flue pipe is welded with a conveying pipe, and a housing is arranged on the right side of the boiler flue pipe. The left side of the housing is fixedly connected with a motor, and the output end of the motor is connected with a rotating rod. The right end of the rotating rod is connected with a cleaning plate. A transition plate is arranged on the right side of the baffle plate. A purification plate is installed at the right end inside the housing, and the right side of the purification plate is fixedly connected with a housing cover by screws. A water pump is arranged below the housing, and the input end of the water pump is connected with a water pipe; the utility model with the publication number CN218485491U discloses an efficient dust removal tower for boiler tail gas purification, including a dust removal tower body, a dust removal component and a stability component. The dust removal component includes a rotating shaft movably installed at the top end inside the dust removal tower body, and a rotating frame fixedly installed at the bottom of the rotating shaft.

[0004] When the above-mentioned boiler tail gas purifier 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 by the built-in cleaning plate. However, shutting down for cleaning often affects the use of the boiler. At the same time, the cleaned dust falls to the bottom of the corresponding filtration chamber, and tools or manual work are needed to take it out, which is inconvenient for dust treatment; the cleaning plate is always on the surface of the baffle plate, which not only hinders the flow of tail gas, but is also easily damaged by high-temperature flue gas and adhered to by dust, resulting in shortened subsequent service life and poor cleaning effect; when the boiler tail gas purification tower is in use, by opening a plurality of air holes on the vortex pipe, the tail gas is discharged into the treatment liquid or water through these air holes, and a stirring mechanism with nail thorns driven by rotation is used to pierce the bubbles, so as to strengthen the reaction absorption of the tail gas. However, in fact, the stirring mechanism needs to run at a high speed, and the tail gas bubbles will also decrease the puncture and decomposition effect with the flow of the water body. This treatment method has limited absorption effect on the tail gas and the tail gas treatment is not sufficient. Summary of the Invention

[0005] The object of the present invention is to provide a boiler tail gas purification device and method to solve the problems that in the use of general boiler tail gas purification equipment, purification is prone to interruption after filtration saturation, on-line cleaning is impossible, and tail gas purification and absorption are insufficient.

[0006] The present invention specifically adopts the following technical solutions to achieve the above object: A boiler tail gas purification device includes a filtration tank. In the middle of the inner cavity of the filtration tank, there is a dust guiding conical groove. At the bottom of the dust guiding conical groove, there is an ash passing valve plate. The top of the filtration tank expands and has a smoke collecting cavity at the edge. A filter ring is installed on the lower wall of the smoke collecting cavity. The bottom and the right wall of the filtration tank are respectively fixedly inserted with a smoke inlet pipe and a smoke guiding cylinder. The top of the smoke inlet pipe is rotatably sleeved with a square sleeve pipe that abuts against the inner wall of the filter ring. The left end of the square sleeve pipe is fixedly connected with a sealing ring sleeved on the periphery of the filter ring. The front wall of the left end of the square sleeve pipe has an ash passing groove and a sealing plate is slidably connected to the front wall. An adjusting assembly for controlling self-rotation and sealing the sealing plate and the ash passing valve plate is arranged on the square sleeve pipe. At the top of the inner cavity of the square sleeve pipe, there is a pressure sensor I and a cleaning assembly is arranged on the front side. It further includes an absorption tank. A smoke exhaust and filtration pipe is fixedly inserted into the top of the absorption tank. At the bottom of the inner cavity of the absorption tank, there is a C-shaped spray pipe. A smoke mixing assembly for mixing smoke and liquid is arranged at the outer end of the C-shaped spray pipe.

[0007] Further, a dust receiving box is slidably inserted into the left wall at the bottom of the filtration tank. The dust guiding conical groove is inclined and the bottom port contracts and is above the dust receiving box.

[0008] Further, the ash passing valve plate is between the dust guiding conical groove and the dust receiving box. The ash passing valve plate is rotatably sleeved on the smoke inlet pipe. The left side of the ash passing valve plate has a valve port corresponding to the bottom port of the dust guiding conical groove.

[0009] Further, the adjusting assembly includes a guide groove I opened on the front wall of the sealing plate. The guide groove I is composed of a vertical groove I at the bottom and an inclined groove at the top in combination and communication. A clamping sleeve is slidably clamped on the periphery of the square sleeve pipe. A pin projection I that is movably clamped with the guide groove I is arranged on the inner wall of the clamping sleeve. The top of the clamping sleeve is fixedly connected with a conical head plug inserted and slidably connected to the outer wall of the square sleeve pipe. A telescopic cylinder is fixedly connected between the top of the square sleeve pipe and the conical head plug. A clamping pipe that is slidably clamped with the conical head plug is fixedly connected to the top of the square sleeve pipe. An adiabatic piston is slidably clamped at the top of the inner cavity of the square sleeve pipe. The pressure sensor I is fixedly connected between the adiabatic piston and the upper wall of the inner cavity of the square sleeve pipe. The pressure sensor I is electrically connected to the telescopic cylinder. An installation frame is provided at the top of the filter tank. A friction worm gear coaxial with the conical head plug is rotatably connected in the middle of the installation frame. A driving worm engaged with the friction worm gear is rotatably connected to the rear side of the top of the installation frame. The driving worm is driven by a motor installed on the left wall of the installation frame. A friction conical groove adapted to the top end of the conical head plug is provided at the bottom of the friction worm gear.

[0010] Further, 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.

[0011] Further, the adjusting assembly further includes a rotating pipe rotatably sleeved on the smoke inlet pipe. The ash passing valve plate is fixedly connected to the bottom of the rotating pipe. The rotating pipe is movably and sealingly inserted into the middle of the filter tank. A second guide groove is formed on the front wall of the rotating pipe. The second guide groove is composed of an arc groove inclined upward from the bottom and a vertical groove at the top in combination and communication. The vertical distance between the two ends of the arc groove is equal to the length of the two ends of the first vertical groove. An adjusting ring sleeved on the rotating pipe is slidably clamped on the outer periphery of the top of the smoke inlet pipe. A second pin projection movably clamped with the second guide groove is provided on the front wall of the inner cavity of the adjusting ring. The adjusting ring is rotatably connected to the inner wall of the clamping sleeve.

[0012] Further, the adjusting assembly further includes a wedge plate fixedly connected to the right wall of the square sleeve. Four pressure sensors are fixedly connected to the inner wall of the top of the filter tank in a circumferential arrangement. The wedge plate is in movable contact with the right pressure sensor. The pressure sensor can feedback and control the contraction of the telescopic cylinder.

[0013] Further, the cleaning assembly includes an adjusting disc rotatably connected to the top of the inner cavity of the filter tank. A toothed head brush roller is rotatably connected to the bottom of the adjusting disc near the front side of the square sleeve. A toothed groove corresponding to the toothed head brush roller is formed on the inner wall of the top of the filter tank. A traction spring is fixedly connected between the adjusting disc and the wedge plate. A wedge groove is formed on the front side of the adjusting disc. Four elastic wedge blocks are slidably clamped on the inner wall of the top of the filter tank in a circumferential array. The front elastic wedge block is clamped with the wedge groove. The wedge plate can extrude the elastic wedge block. The elastic wedge block is adjacent to the pressure sensor.

[0014] Furthermore, the mixed smoke component includes a U-shaped circulation pipe fixedly inserted into 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 cylinder is fixedly sleeved on the U-shaped circulation pipe. A contraction section is provided on the U-shaped circulation pipe. The bottom of the smoke guide cylinder is fixedly connected with a number of one-way valve pipes that are obliquely inserted into the circumferential array on the contraction section. The extension line of the bottom end of the one-way valve pipe does not intersect with the axis of the contraction section. The left wall of the contraction section is fixedly connected with an L-shaped one-way suction pipe extending into the ash guide cone groove. A spiral blade is fixedly connected in the absorption tank, and an activated carbon column is installed in the smoke exhaust filter pipe.

[0015] A method for purifying boiler tail gas includes the following steps: S1. Pass the boiler tail gas into the intake smoke pipe, discharge it through the square sleeve pipe, and filter out dust by the filter ring. When the dust clogs the corresponding part of the filter ring, the tail gas pressure inside the square sleeve pipe increases. The adjustment component controls the ash passing valve plate to first seal the bottom of the ash guide cone groove according to the feedback information of the pressure sensor 1, and then controls the sealing plate to open the ash passing groove. S2. The adjustment component controls the square sleeve pipe to rotate clockwise by 90 degrees to switch to a new filtering part of the filter ring for use. Subsequently, the cleaning component automatically cleans the inner wall of the clogged filter ring, and the cleaned dust falls into the ash guide cone groove. S3. The tail gas filtered by the filter ring is discharged into the smoke collection chamber, and is discharged into the mixed smoke component through the smoke guide cylinder. The tail gas is fully mixed and reacted with the treatment liquid and absorbed. The mixed reaction solution is output by the C-shaped nozzle and sprayed against the absorption tank, thereby increasing the cracking of bubbles and further strengthening the absorption of the treatment liquid on the flue gas. Subsequently, the purified flue gas is filtered and absorbed again by the smoke exhaust filter pipe and then released.

[0016] The beneficial effects of the present invention are as follows: When the filter ring of the present invention reaches the clogging standard, the adjustment component automatically controls the bottom of the ash guide cone groove to be sealed and the ash passing groove to be opened according to the feedback information of the pressure sensor 1, and controls the square sleeve pipe to deflect to switch to a new filtering part of the filter ring for use, and cooperates with driving the cleaning component to automatically clean the clogged part of the filter ring, thereby ensuring the continuous and uninterrupted purification of the tail gas.

[0017] When the present invention filters the tail gas normally, the sealing plate seals the ash passing trough, avoiding the leakage of flue gas. During on-line cleaning, although the ash passing trough is opened, since the bottom of the ash guiding cone trough is sealed and the smoke mixing assembly sucks the flue gas in the ash guiding cone trough, the leakage of flue gas is also avoided. The dust discharged from the ash guiding cone trough can be cleaned at any time, which is safe and convenient. In addition, since the cleaning assembly is outside the square sleeve, the continuous high-temperature damage of the flue gas to the cleaning assembly and the adhesion of dust are avoided, the service life thereof is prolonged, and the subsequent cleaning effect is ensured.

[0018] After the present invention filters the dust in the tail gas through the filter ring, the tail gas is introduced into the smoke mixing assembly and the absorption tank. The output of the smoke mixing assembly and the C-shaped nozzle increases the cracking degree of the smoke bubbles in the reaction liquid, ensuring the full absorption of the tail gas by the reaction liquid. Description of the Drawings

[0019] Figure 1 is the three-dimensional structure diagram of the purification equipment of the present invention; Figure 2 is the exploded view of the filter tank and the square sleeve part of the purification equipment of the present invention; Figure 3 is the exploded view of the jacket and the square sleeve part of the purification equipment of the present invention; Figure 4 is the three-dimensional sectional view of the filter tank and the filter ring part of the purification equipment of the present invention; Figure 5 is the three-dimensional sectional view of the filter tank and the sealing ring part of the purification equipment of the present invention; Figure 6 is the three-dimensional sectional view of the filter tank and the square sleeve part of the purification equipment of the present invention; Figure 7 is the three-dimensional sectional view of the square sleeve and the sealing ring part of the purification equipment of the present invention; Figure 8 is the three-dimensional sectional view of the absorption tank and the U-shaped circulation pipe part of the purification equipment of the present invention.

[0020] Reference Numerals: 1. Filter Tank; 11. Filter Ring; 12. Ash Receiving Box; 13. Smoke Inlet Pipe; 14. Smoke Guide Tube; 15. Friction Worm Gear; 16. Driving Worm; 17. Impeller; 2. Rotating Pipe; 21. Ash Passing Valve Plate; 22. Guide Groove II; 23. Adjusting Ring; 24. Pin Projection II; 3. Square Sleeve; 31. Sealing Ring; 32. Sealing Plate; 33. Guide Groove I; 34. Jacket; 35. Pin Projection I; 36. Taper Head Insert Disk; 37. Telescopic Cylinder; 38. Wedge Plate; 39. Pressure Sensor II; 4. Heat Insulating Piston; 41. Pressure Sensor I; 5. Adjusting Disk; 51. Tooth Head Brush Roller; 52. Traction Spring; 53. Elastic Wedge Block; 6. Absorption Tank; 61. Exhaust Smoke Filter Pipe; 62. Activated Carbon Column; 63. Spiral Blade; 64. U-shaped Circulation Pipe; 65. C-shaped Nozzle; 66. Check Valve Pipe; 67. L-shaped Unidirectional Suction Pipe. Detailed implementation manners

[0021] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, 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.

[0022] Embodiment 1, as Figures 1 - 8 shown, a boiler tail gas purification device includes a filter tank 1. In the middle of the inner cavity of the filter tank 1, there is a dust guiding conical groove. At the bottom of the dust guiding conical groove, there is an ash passing valve plate 21. The top of the filter tank 1 expands and has a smoke collecting cavity at the edge. A filter ring 11 is installed on the lower wall of the smoke collecting cavity. The bottom and the right wall of the filter tank 1 are respectively fixedly inserted with a smoke inlet pipe 13 and a smoke guiding cylinder 14. A square sleeve 3 that abuts against the inner wall of the filter ring 11 is rotatably sleeved on the top of the smoke inlet pipe 13. The left end of the square sleeve 3 is fixedly connected with a sealing ring 31 sleeved around the filter ring 11. The upper and lower walls of the sealing ring 31 are respectively in movable sealing contact with the upper and lower walls of the smoke collecting cavity. The front wall of the left end of the square sleeve 3 has an ash passing groove and a sealing plate 32 is slidably connected to the front wall. An adjusting assembly for controlling the self-rotation and the sealing of the sealing plate 32 and the ash passing valve plate 21 is arranged on the square sleeve 3. A pressure sensor 41 is arranged at the top of the inner cavity of the square sleeve 3 and a cleaning assembly is arranged on the front side; It further includes an absorption tank 6. A smoke exhaust filter pipe 61 is fixedly inserted into the top of the absorption tank 6. A C-shaped spray pipe 65 is fixedly connected to the bottom of the inner cavity of the absorption tank 6. A smoke mixing assembly for mixing smoke and liquid is arranged at the outer end of the C-shaped spray pipe 65.

[0023] A dust collecting box 12 is slidably inserted into the left wall at the bottom of the filter tank 1. The dust guiding conical groove is inclined and the bottom port is contracted and is above the dust collecting box 12. The ash passing valve plate 21 is between the dust guiding conical groove and the dust collecting box 12. The ash passing valve plate 21 is rotatably sleeved on the smoke inlet pipe 13. The left side of the ash passing valve plate 21 has a valve port corresponding to the bottom port of the dust guiding conical groove.

[0024] When purifying the boiler tail gas, the boiler tail gas is introduced into the square sleeve 3 through the smoke inlet pipe 13. The square sleeve 3 outputs the tail gas into the smoke collecting cavity. During this period, when the tail gas passes through the filter ring 11, dust is filtered out. The filtered tail gas is discharged into the smoke mixing assembly through the smoke collecting cavity and the smoke guiding cylinder 14. The smoke mixing assembly controls the full mixing of the tail gas and the treatment liquid, so that the tail gas is absorbed. The solution after the mixing reaction is output from the C-shaped spray pipe 65 and sprayed into the absorption tank 6, thereby increasing the cracking of the tail gas bubbles and making the contact between the tail gas and the treatment liquid more sufficient, further strengthening the absorption of the tail gas by the treatment liquid. Subsequently, the purified tail gas is filtered and absorbed again by the smoke exhaust filter pipe 61 and then released without pollution; When the filter ring 11 is saturated and blocked to the corresponding standard, the tail gas pressure inside the square sleeve 3 increases. The first pressure sensor 41 feeds back to control the regulating component to drive the ash passing valve plate 21 to deflect and seal the bottom of the ash guiding cone groove, preventing tail gas leakage during subsequent cleaning. Then the regulating component controls the sealing plate 32 to move rightward to open the ash passing groove, facilitating the exposure of dust when the square sleeve 3 deflects. Subsequently, the regulating component controls the square sleeve 3 to deflect clockwise by ninety degrees ( Figure 2 in the direction of the arrow in Figure 2 ), switching to use a new filtering part of the filter ring 11. During this period, the outlet of the square sleeve 3 always faces the filter ring 11. The tail gas discharged from the square sleeve 3 continuously outputs to the smoke collecting cavity through the new filtering part of the filter ring 11, without affecting the normal purification of the tail gas. Moreover, the sealing ring 31 continuously adjusts the sealing area for the filter ring 11 as the square sleeve 3 rotates, ensuring stable exhaust of the square sleeve 3 and preventing the tail gas in the smoke collecting cavity from flowing back into the ash guiding cone groove through parts other than the outlet of the square sleeve 3, causing great disturbance to the dust cleaned in the ash guiding cone groove. When the square sleeve 3 rotates by ninety 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 square sleeve 3. The cleaned dust drops into the ash guiding cone groove sealed at the bottom. During this period, a small amount of tail gas enters the ash guiding cone groove through the ash passing groove on the front wall of the square sleeve 3, but the smoke mixing component automatically extracts and purifies this part of the tail gas. This ensures that when the sealing plate 32 resets to seal the ash passing groove and the ash passing valve plate 21 resets to open the bottom of the ash guiding cone groove later, there will be no tail gas leakage, and when the dust in the ash guiding cone groove is released into the ash receiving box 12, relevant personnel will not absorb the tail gas, guaranteeing physical and mental health. The dust discharged from the ash guiding cone groove can be cleaned at any time, which is safe and convenient. Since when the filter ring 11 is blocked, the regulating component can cooperate with the cleaning component to automatically clean the filter ring 11 online, thus ensuring continuous and uninterrupted tail 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 the flue gas and dust adhesion, prolongs its service life, and ensures the subsequent cleaning effect.

[0025] Embodiment 2: On the basis of the above embodiment, the regulating component includes a first guide groove 33 opened on the front wall of the sealing plate 32. The first guide groove 33 is composed of a vertical groove 331 at the bottom and an inclined groove 332 at the top which are combined and communicated. A jacket 34 is slidably clamped on the periphery of the square sleeve 3. A first pin protrusion 35 which is movably clamped with the first guide groove 33 is arranged on the inner wall of the jacket 34. A tapered head plug 36 which is slidably clamped with the outer wall of the square sleeve 3 is fixedly connected to the top of the jacket 34. A telescopic cylinder 37 is fixedly connected between the top of the square sleeve 3 and the tapered head plug 36. A clamping pipe which is slidably clamped with the tapered head plug 36 is fixedly connected to the top of the square sleeve 3. An adiabatic piston 4 is slidably clamped at the top of the inner cavity of the square sleeve 3. The first pressure sensor 41 is fixedly connected between the adiabatic piston 4 and the upper wall of the inner cavity of the square sleeve 3. The first pressure sensor 41 is electrically connected to the telescopic cylinder 37.

[0026] When the filter ring 11 is saturated and blocked to the corresponding standard, the exhaust gas pressure inside the square sleeve 3 increases. While the adiabatic piston 4 protects the first pressure sensor 41 from high temperature damage, it squeezes the first pressure sensor 41 and makes the first pressure sensor 41 feedback to control the telescopic cylinder 37 to extend, driving the conical head plug 36 to move upward. The conical head plug 36 thus drives the jacket 34 to move upward. When the first pin projection 35 on the inner wall of the jacket 34 moves upward along the first guide groove 33 and squeezes the inclined groove therein upward, the sealing plate 32 is thus driven to move rightward to open the ash passing groove, so as to expose the dust blocking the inner wall of the filter ring 11 after the subsequent deflection of the square sleeve 3.

[0027] An installation frame is arranged at the top of the filter tank 1. A friction worm gear 15 coaxial with the conical head plug 36 is rotatably connected in the middle of the installation frame. A driving worm 16 meshing with the friction worm gear 15 is rotatably connected at the rear side of the top of the installation frame. The driving worm 16 is driven by a motor installed on the left wall of the installation frame. A friction conical groove adapted to the top end of the conical head plug 36 is arranged at the bottom of the friction worm gear 15.

[0028] During the use of the equipment, the motor drives the driving worm 16 to make the friction worm gear 15 continuously operate. When the telescopic cylinder 37 extends and drives the conical head plug 36 to move upward to the maximum distance, the conical head plug 36 just abuts against the friction conical groove at the bottom of the friction worm gear 15. The conical head plug 36 is thus driven to deflect. The square sleeve 3 is stably driven to deflect by cooperating with the clamping pipe to limit the deflection of the conical head plug 36 relative to the square sleeve 3, so as to switch the use of different filtering parts of the filter ring 11.

[0029] Embodiment 3, on the basis of the above embodiment, the adjusting assembly further includes a rotating pipe 2 rotatably sleeved on the smoke inlet pipe 13. An ash passing valve plate 21 is fixedly connected to the bottom of the rotating pipe 2. The rotating pipe 2 is movably and sealingly inserted in the middle of the filter tank 1. A second guide groove 22 is formed on the front wall of the rotating pipe 2. The second guide groove 22 is composed of a combined connection of an arc groove inclined upward from 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 first vertical groove. A regulating ring 23 sleeved on the rotating pipe 2 is slidably clamped on the outer periphery of the top of the smoke inlet pipe 13. A second pin projection 24 movably clamped with the second guide groove 22 is arranged on the front wall of the inner cavity of the regulating ring 23. The regulating ring 23 is rotatably connected to the inner wall of the jacket 34.

[0030] The initial pin projection two 24 is movably clamped to the bottom of the guide groove two 22, and the pin projection one 35 is movably clamped to the bottom of the guide groove one 33. When the jacket 34 is driven to move upward, the jacket 34 drives the adjusting ring 23 to move upward synchronously. The adjusting ring 23 drives the pin projection two 24 to upwardly press the arc groove in the guide groove two 22, and the jacket 34 drives the pin projection one 35 to move upward along the vertical groove one in the guide groove one 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 one, the rotating pipe 2 is driven, so that the ash passing valve plate 21 deflects first to seal the bottom of the ash guiding conical groove. Subsequently, when the pin projection one 35 presses the inclined groove and the pin projection two 24 moves upward along the vertical groove two, the sealing plate 32 is driven to open the ash passing groove, thus ensuring that 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, the bottom of the ash guiding conical groove is sealed first to prevent the flue gas from leaking outwards.

[0031] Embodiment 4, on the basis of the above embodiment, the adjusting assembly further includes a wedge plate 38 fixedly connected to the right wall of the square sleeve 3. Four pressure sensors two 39 arranged in a circle are fixedly connected to the inner top wall of the filter tank 1. The wedge plate 38 is in movable abutment with the right-side pressure sensor two 39, and the pressure sensor two 39 can feedback to control the contraction of the telescopic cylinder 37.

[0032] When the square sleeve 3 deflects by ninety degrees, the wedge plate 38 synchronously abuts against the next pressure sensor two 39. This pressure sensor two 39 thus feedbacks to control the contraction of the telescopic cylinder 37, thereby driving the sealing plate 32 to move leftward and reset first to seal the ash passing groove, preventing the tail gas from continuing to leak into the ash guiding conical groove, and then driving the ash passing valve plate 21 to reset to open the bottom outlet of the ash guiding conical groove, thus facilitating the subsequent automatic and stable release of the cleaned dust into the ash receiving box 12.

[0033] Embodiment 5, on the basis of the above embodiment, the cleaning assembly includes an adjusting disk 5 rotatably connected to the top inner cavity of the filter tank 1. A toothed head brush roll 51 is rotatably connected to the bottom of the adjusting disk 5 near the front side of the square sleeve 3. Tooth grooves corresponding to the toothed head brush roll 51 are formed in the top inner wall of the filter tank 1. A traction spring 52 is fixedly connected between the adjusting disk 5 and the wedge plate 38. A wedge groove is formed in the front side of the adjusting disk 5. Four elastic wedge blocks 53 arranged in a circular array are slidably clamped to the top inner wall of the filter tank 1. The front elastic wedge block 53 is clamped to the wedge groove, and the wedge plate 38 can press the elastic wedge blocks 53. The elastic wedge blocks 53 are adjacent to the pressure sensors two 39.

[0034] When the square sleeve 3 drives the wedge plate 38 to deflect, the adjusting disc 5 is restricted by 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 90 degrees and stop, the wedge plate 38 just squeezes through and drives the elastic wedge block 53 clamped in the opposing wedge groove to contract. The adjusting disc 5 loses its restriction and thus quickly deflects under the pulling of the traction spring 52 until the wedge groove is clamped onto the next elastic wedge block 53, and the corresponding tooth head brush roller 51 is driven to rotate rapidly in engagement with the tooth groove, cleaning the dust on the inner wall of the filter ring 11, thereby improving the cleaning effect.

[0035] Embodiment Six, on the basis of the above embodiment, the mixed smoke assembly includes a U-shaped circulation pipe 64 fixedly inserted 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 a C-shaped nozzle 65. The smoke guide cylinder 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 cylinder 14 is fixedly connected with a number of one-way valve pipes 66 that are obliquely inserted in a circumferential array on the contraction section. The extension line of the bottom end of the one-way valve pipe 66 does not intersect the axis of the contraction section. The left wall of the contraction section is fixedly connected with an L-shaped one-way suction pipe 67 extending into the ash guide cone groove. A spiral blade 63 is fixedly connected in the absorption tank 6, and an activated carbon column 62 is installed in the smoke exhaust filter pipe 61.

[0036] When the driving worm 16 rotates, it drives the impeller 17 to continuously operate. The impeller 17 pumps 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 in cooperation with the C-shaped nozzle 65 for circulation. When the reaction liquid passes through the contraction section of the U-shaped circulation pipe 64, its flow rate becomes faster due to the negative pressure effect. Correspondingly, the tail gas discharged from the smoke guide cylinder 14 is quickly suctioned through the one-way valve pipe 66, strengthening the tail gas circulation effect and also reducing the escape of tail gas from the ash passing groove into the ash guide cone groove. The tail gas suctioned through the one-way valve pipe 66 enters the contraction section and mixes with the reaction liquid. At the same time, by utilizing the property that the one-way valve pipe 66 is obliquely inserted and the extension line of its bottom end does not intersect the axis of the contraction section, the gas-liquid mixture automatically generates a high-speed swirl and forms a shear force to shear and break the tail gas bubbles, strengthening the contact area between the tail gas and the reaction liquid, enhancing the reaction. And the mixed reaction solution is output and sprayed by the C-shaped nozzle 65, thereby increasing the collision and cracking of the tail gas bubbles, making the contact between the tail gas and the treatment liquid more sufficient. The purified tail gas discharged into the absorption tank 6 later, after being guided by the spiral blade 63, increases its moving distance out of the reaction liquid, further strengthening the absorption of the tail gas by the treatment liquid. The finally purified tail gas is filtered and absorbed by the activated carbon column 62 in the smoke exhaust filter pipe 61 and then released without pollution. 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 introducing it into the treatment liquid for purification, and the collection and treatment of dust by the ash receiving box 12 is safe and reliable.

[0037] Embodiment VII. On the basis of the above embodiments, a method for purifying boiler tail gas is provided, including the following steps: S1. The boiler tail gas is introduced through the smoke inlet pipe 13, discharged from the square sleeve 3, and the dust is filtered out by the filter ring 11. When the dust clogs the corresponding part of the filter ring 11, the tail gas pressure inside the square sleeve 3 increases. The adjustment assembly controls the ash passing valve plate 21 to first seal the bottom of the ash guiding cone groove according to the feedback information of the pressure sensor 41, and then controls the sealing plate 32 to open the ash passing groove. S2. The adjustment assembly controls the square sleeve 3 to deflect clockwise by 90 degrees to switch to a new filtering part of the filter ring 11 for use. Subsequently, the cleaning assembly automatically cleans the inner wall of the clogged filter ring 11, and the cleaned dust falls into the ash guiding cone groove. S3. The tail gas filtered by the filter ring 11 is discharged into the smoke collecting cavity and then into the smoke mixing assembly through the smoke guiding cylinder 14. The tail gas is fully mixed and reacted with the treatment liquid and absorbed. The mixed reaction solution is output from the C-shaped nozzle 65 and sprayed onto the absorption tank 6 in a counter-jet manner, thereby increasing the cracking of the bubbles and further enhancing the absorption of the treatment liquid to the flue gas. Subsequently, the purified flue gas is filtered and absorbed again by the smoke exhaust filter pipe 61 and then released.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A boiler tail gas purification device, including a filter tank (1), characterized in that, The middle part of the inner cavity of the filter tank (1) has an ash guiding cone groove, and an ash passing valve plate (21) is arranged at the bottom of the ash guiding cone groove. The top of the filter tank (1) expands and has a smoke collecting cavity at the edge. A filter ring (11) is installed on the lower wall of the smoke collecting cavity. The bottom and the right wall of the filter tank (1) are respectively fixedly inserted with a smoke inlet pipe (13) and a smoke guiding cylinder (14). A square sleeve (3) that abuts against the inner wall of the filter ring (11) is rotatably sleeved on the top of the smoke inlet pipe (13). A sealing ring (31) sleeved on the periphery of the filter ring (11) is fixedly connected to the left end of the square sleeve (3). An ash passing groove is formed in the front wall of the left end of the square sleeve (3), and a sealing plate (32) is slidably connected to the front wall. An adjusting assembly for controlling self-rotation and sealing the sealing plate (32) and the ash passing valve plate (21) is arranged on the square sleeve (3). A pressure sensor I (41) is arranged at the top of the inner cavity of the square sleeve (3), and a cleaning assembly is arranged on the front side. It further includes an absorption tank (6). A smoke exhaust filter pipe (61) is fixedly inserted into the top of the absorption tank (6). A C-shaped spray pipe (65) is fixedly connected to the bottom of the inner cavity of the absorption tank (6). A smoke mixing assembly for mixing with smoke liquid is arranged at the outer end of the C-shaped spray pipe (65).

2. The boiler tail gas purification equipment according to claim 1, characterized in that, A ash receiving box (12) is slidably inserted into the left wall at the bottom of the filter tank (1). The ash guiding cone groove is inclined, and the bottom port thereof 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 guiding cone groove and the ash receiving box (12). The ash passing valve plate (21) is rotatably sleeved on the smoke inlet pipe (13). A valve port corresponding to the bottom port of the ash guiding cone groove is arranged on the left side of the ash passing valve plate (21).

4. A boiler tail gas purification device according to claim 3, characterized in that, The adjusting assembly includes a guide groove I (33) formed in the front wall of the sealing plate (32). The guide groove I (33) is composed of a vertical groove I at the bottom and an inclined groove at the top which are combined and communicated. A jacket (34) is slidably clamped on the periphery of the square sleeve (3). A pin protrusion I (35) that is movably clamped with the guide groove I (33) is arranged on the inner wall of the jacket (34). A tapered head insertion plate (36) that is slidably clamped with the outer wall of the square sleeve (3) is fixedly connected to the top of the jacket (34). A telescopic cylinder (37) is fixedly connected between the top of the square sleeve (3) and the tapered head insertion plate (36). A clamping pipe that is slidably clamped with the tapered head insertion plate (36) is fixedly connected to the top of the square sleeve (3). An adiabatic piston (4) is slidably clamped at the top of the inner cavity of the square sleeve (3). The pressure sensor I (41) is fixedly connected between the adiabatic piston (4) and the upper wall of the inner cavity of the square sleeve (3). The pressure sensor I (41) is electrically connected to the telescopic cylinder (37). A mounting frame is provided at the top of the filter tank (1). A friction worm gear (15) coaxial with the tapered head plug (36) is rotatably connected to the middle of the mounting frame. 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 driving worm (16) is driven by a motor installed on the left wall of the mounting frame. A friction cone groove adapted to the top end of the tapered head plug (36) is provided at the bottom of the friction worm gear (15).

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

6. The boiler tail gas purification device according to claim 5, characterized in that, The adjusting assembly further includes a rotating pipe (2) rotatably sleeved on the smoke inlet pipe (13). The ash passing valve plate (21) is fixedly connected to the bottom of the rotating pipe (2). The rotating pipe (2) is movably and sealingly inserted into the middle of the filter tank (1). A second guide groove (22) is formed on the front wall of the rotating pipe (2). The second guide groove (22) is formed by combining an arc groove inclined upward from the bottom and a vertical groove at the top. The vertical distance between the two ends of the arc groove is equal to the length between the two ends of the first vertical groove. An adjusting ring (23) sleeved on the rotating pipe (2) is slidably clamped on the outer periphery of the top of the smoke inlet pipe (13). A second pin protrusion (24) movably clamped with the second guide groove (22) is provided on the front wall of the inner cavity of the adjusting ring (23). The adjusting ring (23) is rotatably connected to the inner wall of the jacket (34).

7. A boiler tail gas purification device according to claim 6, characterized in that, The adjusting assembly further includes a wedge plate (38) fixedly connected to the right wall of the square sleeve (3). Four pressure sensors II (39) arranged in a circle are fixedly connected to the inner wall of the top of the filter tank (1). The wedge plate (38) is in movable contact with the right-side pressure sensor II (39). The pressure sensor II (39) can feedback to control the contraction of the telescopic cylinder (37).

8. A boiler tail gas purification device according to claim 7, characterized in that, The cleaning assembly includes an adjusting disc (5) rotatably connected to the top of the inner cavity of the filter tank (1). A toothed head brush roller (51) is rotatably connected to the bottom of the adjusting disc (5) near the front side of the square sleeve (3). Tooth grooves corresponding to the toothed head brush roller (51) are formed on the inner wall of the top of the filter tank (1). A traction spring (52) is fixedly connected between the adjusting disc (5) and the wedge plate (38). A wedge groove is formed on the front side of the adjusting disc (5). Four elastic wedge blocks (53) arranged in a circular array are slidably clamped on the inner wall of the top of the filter tank (1). The front elastic wedge block (53) is clamped with the wedge groove. The wedge plate (38) can squeeze the elastic wedge block (53). The elastic wedge block (53) is adjacent to the pressure sensor II (39).

9. A boiler tail gas purification device according to claim 8, characterized in that, The mixed smoke component includes a U-shaped circulation pipe (64) fixedly inserted 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 cylinder (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 cylinder (14) is fixedly connected with a number of one-way valve pipes (66) that are obliquely inserted into the circumferential 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 with an L-shaped one-way suction pipe (67) extending into the ash guide cone groove. A spiral blade (63) is fixedly connected in the absorption tank (6). An activated carbon column (62) is installed in the smoke exhaust filter pipe (61).

10. A method for purifying boiler tail gas, which uses a boiler tail gas purification device as described in any one of claims 1-9, characterized in that, It includes the following steps: S1. The boiler tail gas is introduced through the smoke inlet pipe (13) and discharged through the square sleeve (3). The dust is filtered out by the filter ring (11). When the dust clogs the corresponding part of the filter ring (11), the tail gas pressure inside the square sleeve (3) increases. The adjustment component controls the ash passing valve plate (21) to first seal the bottom of the ash guide cone groove according to the feedback information of the pressure sensor 1 (41), and then controls the sealing plate (32) to open the ash passing groove; S2. The adjustment component controls the square sleeve (3) to rotate clockwise by 90 degrees to switch to a new filtering part of the filter ring (11) for use. Subsequently, the cleaning component automatically cleans the inner wall of the clogged 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 collection chamber and then discharged into the mixed smoke component through the smoke guide cylinder (14). The tail gas is fully mixed and reacted with the treatment liquid and absorbed. The mixed reaction solution is output by the C-shaped nozzle (65) and sprayed onto the absorption tank (6) in a counter-jet manner, thereby increasing the cracking of bubbles and further enhancing the absorption of the treatment liquid to the smoke. Subsequently, the purified smoke is filtered and absorbed again by the smoke exhaust filter pipe (61) and then released.

Images