Multi-stage tail gas absorption tower

Abstract

The invention relates to the technical field of tail gas treatment, and provides a multi-stage tail gas absorption tower which comprises an adsorption tower, a tail gas pipe fixedly penetrates through the surface of the adsorption tower, an exhaust pipe fixedly penetrates through the surface of the adsorption tower, and an air outlet fan is fixedly installed at the end, away from the adsorption tower, of the exhaust pipe. A pretreatment device for pretreating tail gas is arranged on the circumferential surface of the adsorption tower, the pretreatment device comprises a motor, the motor is fixedly mounted on the circumferential surface of the adsorption tower, a rotating shaft rotatably penetrates through the surface of the adsorption tower, and a spraying ring is fixedly mounted on the inner wall of the adsorption tower; a circulating pipe fixedly penetrates through the surface of the spraying ring, and a fan is fixedly mounted on the circumferential surface of the rotating shaft. Through the technical scheme, the technical problem that equipment and pipelines are easy to corrode if high-humidity tail gas is not subjected to dehumidification treatment in the prior art is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of tail gas treatment, and specifically, to a multi-stage tail gas absorption tower. Background Art

[0002] The multi-stage tail gas adsorption tower is a device widely used in industrial waste gas treatment, especially for treating waste gas containing harmful substances. Through multi-stage filtration and adsorption, pollutants in the tail gas can be effectively removed, thus meeting environmental protection requirements.

[0003] The patent with the patent announcement number CN217367844U relates to a multi-stage tail gas absorption tower, including an adsorption chamber. The inner wall of the pretreatment chamber is penetrated with mounting blocks, and the shape of the mounting blocks matches the shape of the inner wall of the pretreatment chamber. Pretreatment through-holes are formed on both sides of the mounting blocks, and the pretreatment through-holes are respectively communicated with the adsorption chamber and the air duct. Positioning buckle blocks are fixedly connected to both sides of the inner wall of the mounting blocks, and the mounting blocks are positioned and installed with the pretreatment filter plate through the positioning buckle blocks. A pull handle is provided at the upper end of the mounting block. One side of the adsorption chamber of the tail gas adsorption tower for amine salt environmental protection production is communicated with the pretreatment chamber. It can insert and install the pretreatment filter plate and the pretreatment chamber through the mounting block, and can perform pre-filtration treatment through the pretreatment through-holes to filter out large-particle impurities, enhance the efficiency of spray adsorption, and the pretreatment filter plate can be quickly disassembled and assembled with the mounting block through the positioning buckle blocks, making it more convenient to use.

[0004] In the above patent, pre-filtration treatment is carried out through the pretreatment through-holes to filter out large-particle impurities and enhance the efficiency of spray adsorption. However, if the high-humidity tail gas is not dehumidified, it is easy to cause corrosion of equipment and pipelines. Therefore, a device with automatic replacement of filter elements for pretreatment and dehumidification is designed. Summary of the Invention

[0005] To overcome the above defects, embodiments of the present invention provide a multi-stage tail gas absorption tower, which solves the technical problem that if the high-humidity tail gas in the prior art is not dehumidified, it is easy to cause corrosion of equipment and pipelines.

[0006] According to one aspect, at least one embodiment of the present invention provides a multi-stage tail gas absorption tower, including an adsorption tower. A tail gas pipe is fixedly penetrated through the surface of the adsorption tower, and an exhaust pipe is fixedly penetrated through the surface of the adsorption tower. An air outlet fan is fixedly installed at one end of the exhaust pipe away from the adsorption tower. A pretreatment device for pre-treating the tail gas is arranged on the circumferential surface of the adsorption tower. The pretreatment device includes a motor fixedly installed on the circumferential surface of the adsorption tower. A rotating shaft is rotatably penetrated through the surface of the adsorption tower. A spray ring is fixedly installed on the inner wall of the adsorption tower. A circulation pipe is fixedly penetrated through the surface of the spray ring. A fan is fixedly installed on the circumferential surface of the rotating shaft. A drying box is fixedly installed on the inner wall of the adsorption tower. A rotating plate is fixedly installed on the circumferential surface of the rotating shaft. A drying cylinder is rotatably installed on the inner wall of the rotating plate. A stirring ring is fixedly installed on the circumferential surface of the drying cylinder. A first turntable is fixedly installed on the circumferential surface of the drying cylinder. A rotating column is rotatably penetrated through the surface of the tail gas pipe. A filter rack is sleeved on the circumferential surface of the rotating column. A threaded rod is rotatably penetrated through the surface of the tail gas pipe. A first telescopic elastic rod is fixedly installed on the surface of the rotating column. A sliding plate is sleeved on the circumferential surface of the threaded rod. A second turntable is fixedly installed at one end of the threaded rod away from the filter rack. A scraper is rotatably penetrated through the surface of the tail gas pipe, achieving the effect of replacing, cleaning and regenerating the filter rack, realizing the regeneration and repeated use of the filter element, reducing the consumable cost, avoiding the time-consuming and laborious manual cleaning, thereby increasing the equipment downtime and affecting the operation efficiency of the equipment.

[0007] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, the inside of the rotating shaft is hollow. Nozzles for spraying the tail gas are arranged on the inner wall of the spray ring. One end of the circulation pipe away from the spray ring is fixedly penetrated through the surface of the adsorption tower. A first transmission belt is connected between the output end of the motor and the rotating shaft in a transmission manner. A first spring for resetting is arranged between the tail gas pipe and the rotating column, realizing the recycling of lime water, reducing the waste of chemicals, lowering the operation cost, simultaneously strengthening the resource recycling efficiency and reducing the waste water discharge.

[0008] The angle of the drying cylinder is set as an inclined angle. The first turntable is in contact with the circumferential surface of the drying cylinder. The filter rack is slidably connected with the threaded rod and is in threaded connection with the threaded rod. The stirring ring is slidably connected with the inner wall of the drying box. One end of the threaded rod away from the second turntable is sleeved with the filter rack, further improving the drying effect or efficiency of the drying cylinder on the moisture-absorbing particles inside the drying box, quickly desorbing the moisture of the moisture-absorbing particles, restoring the moisture-absorbing capacity and prolonging the service life.

[0009] According to another aspect, at least one embodiment of the present invention further provides a multi-stage tail gas absorption tower. The free end of the first telescopic elastic rod is fixedly connected to the surface of the filter frame. The sliding plate is fixedly connected to the free end of the first telescopic elastic rod. The second turntable is in contact with the rotating column. There is a second transmission belt connected between the output end of the motor and the scraper. The first turntable is in contact with the inner wall of the drying box, which increases the contact area between the moisture-absorbing particles and the drying cylinder. At the same time, it avoids the moisture-absorbing particles inside the drying box from becoming wet on the surface due to inhaling a large amount of moisture during operation, and breaks the adhesion between the particles, avoiding the occurrence of caking, sticking or accumulation, thereby affecting the dehumidification effect and efficiency of the tail gas.

[0010] The inner wall of the adsorption tower is provided with a cleaning device for cleaning the activated carbon box and the spray ring under specific circumstances. The cleaning device includes an activated carbon box. The activated carbon box is slidably installed on the inner wall of the adsorption tower. A toothed disk is fixedly installed on the circumferential surface of the rotating shaft. A scraping wheel is slidably connected to the top of the activated carbon box. A fixed rod is fixedly installed on the top of the activated carbon box. A scraping ring is fixedly installed on the circumferential surface of the fixed rod. A first fixed ring is fixedly installed on the inner wall of the adsorption tower. A second telescopic elastic rod is fixedly installed on the surface of the scraping ring, which realizes that the activated carbon box is only cleaned when its surface is blocked by impurity particles in the tail gas, avoiding damage to the surface of the activated carbon box caused by always scraping and cleaning its surface, thereby affecting the working efficiency and effect of the activated carbon box.

[0011] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, the scraping wheel is sleeved on the circumferential surface of the rotating shaft. The bottom of the scraping wheel is provided with a toothed block for docking and meshing with the toothed disk. The scraping wheel meshes with the toothed disk to clean the surface of the activated carbon box, so that the activated carbon box can always maintain a good working state, thereby improving the purification and adsorption efficiency of the activated carbon box, reducing mechanical wear during daily operation, and extending the service life of the activated carbon box.

[0012] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, the free end of the second telescopic elastic rod is fixedly connected to the bottom of the first fixed ring. The circumferential surface of the scraping ring is provided with bristles for cleaning the nozzle to prevent blockage. The salt substances generated by the reaction of the tail gas and the lime water are easy to crystallize and adhere to the surface of the spray ring, resulting in nozzle blockage or pipeline corrosion, and then the spray ring cannot work properly or the components are corroded.

[0013] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, a feeding device for feeding agents into the equipment is provided at the top of the scraping wheel. The feeding device includes a threaded cylinder fixedly installed at the top of the scraping wheel. A second fixing ring is sleeved on the circumferential surface of the threaded cylinder. A sliding ring is slidably installed on the circumferential surface of the threaded cylinder. A third telescopic elastic rod is fixedly installed on the circumferential surface of the second fixing ring. A connecting rod is fixedly installed at the top of the sliding ring. A limiting cylinder is fixedly installed at one end of the connecting rod away from the sliding ring. A rotating ring is fixedly installed at one end of the threaded cylinder away from the scraping wheel. An inclined cutting block is fixedly installed at the top of the rotating ring. A knocking plate is sleeved on the circumferential surface of the rotating shaft to realize the feeding of the agent on the inner wall of the absorption tower. This agent is only fed when the activated carbon box is blocked, avoiding unnecessary waste caused by feeding during operation, and at the same time, the degree of blockage indirectly reflects the tail gas pollution load.

[0014] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, the free end of the third telescopic elastic rod is slidably connected to the sliding ring. The sliding ring is threadedly connected to the threaded cylinder. A limiting port for contacting the surface of the rotating shaft for limiting and feeding is provided on the circumferential surface of the limiting cylinder, realizing the adaptive matching of the pollution overload treatment agent, improving the treatment efficiency while reducing the agent consumption.

[0015] For example, in a multi-stage tail gas absorption tower provided by at least one embodiment of the present invention, a discharge port for feeding is provided on the circumferential surface of the rotating shaft. A first arc surface for squeezing the knocking plate to move upward is provided on the surface of the inclined cutting block. The knocking plate and the connecting rod slide through each other. A second spring for resetting is provided between the rotating ring and the knocking plate. The vibration of the spraying ring effectively avoids the blockage of the nozzles on its surface by tail gas particles, thereby affecting its operating efficiency, and can inhibit the accumulation of impurities inside the nozzles, further reducing the shutdown and maintenance costs caused by equipment corrosion.

[0016] The beneficial effects of the embodiments of the present invention are: In the present invention, large particulate impurities in the tail gas are intercepted and adsorbed by the filter rack, effectively intercepting large particulate impurities in the tail gas to achieve preliminary purification. The second turntable rotates to contact the rotating column and drives the rotating column to rotate. The rotating column rotates to insert the next filter rack into the interior of the tail gas pipe, realizing the replacement of the filter rack when it is blocked, automatically replacing the filter rack without manual intervention, ensuring continuous operation of the equipment, improving the operation efficiency, the scraper rotates to clean the filter rack whose surface is blocked by impurities, realizing the replacement, cleaning and regeneration effect of the filter rack, realizing the regeneration and reuse of the filter element, reducing the consumable cost, avoiding the time-consuming and laborious manual cleaning, further increasing the equipment downtime, and thus affecting the operation efficiency of the equipment. The lime water filtered at the bottom of the adsorption tower will be pumped back into the interior of the spray ring through the circulation pipe, realizing the recycling of lime water, reducing the waste of chemicals, reducing the operation cost, and at the same time strengthening the resource recycling efficiency and reducing the wastewater discharge.

[0017] In the present invention, the first turntable rotates in contact with the inner wall of the drying box under the action of the drying cylinder. Since the first turntable contacts the drying cylinder at the other end, the rotation of the first turntable drives the drying cylinder to rotate. At this time, while realizing the revolution of the drying cylinder, its rotation is also achieved, further improving the drying effect or efficiency of the drying cylinder on the moisture-absorbing particles inside the drying box, quickly desorbing the moisture of the moisture-absorbing particles, restoring the moisture-absorbing capacity, and extending the service life. At the same time, the rotation of the drying cylinder drives the stirring ring to rotate, and the rotation of the stirring ring stirs the moisture-absorbing particles accumulated inside the drying box, increasing the contact area between the moisture-absorbing particles and the drying cylinder, and at the same time preventing the moisture-absorbing particles inside the drying box from becoming wet on the surface due to inhaling a large amount of moisture during operation, and breaking the adhesion between the particles, avoiding the occurrence of caking, sticking or accumulation, and thus affecting the dehumidification effect and efficiency of the tail gas, making the particles fully dispersed, fully contacting with the moisture in the tail gas, improving the moisture absorption rate, and at the same time reducing the frequency of manual turning of materials or replacement of particles caused by caking, and reducing the operation and maintenance cost.

[0018] In the present invention, the gear disk rotates under the action of the rotating shaft to drive the scraping wheel to rotate, and the scraping wheel rotates to scrape and clean the impurity particles attached to or blocked on the surface of the activated carbon box, realizing that the surface of the activated carbon box is cleaned only when it is blocked by impurity particles in the tail gas, avoiding that always scraping and cleaning its surface will damage the surface of the activated carbon box, thereby affecting the working efficiency and effect of the activated carbon box, and cleaning the surface of the activated carbon box, enabling the activated carbon box to always maintain a good working state, thereby improving the purification and adsorption efficiency of the activated carbon box, reducing the mechanical wear in daily operation, and extending the service life of the activated carbon box.

[0019] In the present invention, the scraping ring is driven to move downward by the movement of the fixing rod. As the scraping ring moves downward, it cleans the surface of the spraying ring. The salt substances generated by the reaction of the tail gas with the lime water are prone to crystallization and adhere to the surface of the spraying ring, resulting in nozzle blockage or pipeline corrosion, and further leading to the abnormal operation of the spraying ring or component corrosion, thereby reducing the service life of the equipment. At the same time, the risk of corrosion of metal components is reduced, the service life of the spraying system is extended, and the shutdown and maintenance costs caused by equipment corrosion are reduced.

[0020] In the present invention, the limiting cylinder is driven to move upward by the connecting rod. At this time, the limiting cylinder moves until the limiting opening formed on its surface coincides with the discharge port on the surface of the rotating shaft, and at this time, the dosing of the agent on the inner wall of the adsorption tower is realized. This agent is only dosed when the activated carbon box is blocked, avoiding unnecessary waste caused by dosing during operation. At the same time, since the degree of blockage indirectly reflects the tail gas pollution load, the self-adaptive matching of the treatment agent for pollution overload treatment is realized, the treatment efficiency is improved while the agent consumption is reduced. The knocking plate moves upward under the action of the inclined cut block to knock on the surface of the spraying ring. At this time, the spraying ring vibrates under the action of the knocking plate. The vibration of the spraying ring effectively prevents the nozzles on its surface from being blocked by tail gas particles, thereby affecting its operating efficiency, and can inhibit the accumulation of impurities inside the nozzles, further reducing the shutdown and maintenance costs caused by equipment corrosion. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments of the present invention. Obviously, the following-described drawings are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present invention and these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a schematic diagram of the positional structure of the spraying ring and the fan of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of part A structure in; Figure 5 It is a schematic diagram of the positional structure of the rotating column and the filter rack of the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram of part B structure in; Figure 7 It is a schematic diagram of the positional structure of the gear disc and the scraping wheel of the present invention; Figure 8 It is a schematic diagram of the positional structure of the second fixing ring and the sliding ring of the present invention.

[0023] In the figure: 1, adsorption tower; 2, tail gas pipe; 3, exhaust pipe; 4, outlet fan; 51, motor; 52, rotating shaft; 53, spray ring; 54, circulation pipe; 55, fan; 56, drying box; 57, rotating plate; 58, drying cylinder; 59, stirring ring; 510, turntable one; 511, rotating column; 512, filter rack; 513, threaded rod; 514, telescopic elastic rod one; 515, sliding plate; 516, turntable two; 517, scraper; 61, activated carbon box; 62, toothed disc; 63, scraping wheel; 64, fixed rod; 65, scraping ring; 66, fixing ring one; 67, telescopic elastic rod two; 71, threaded barrel; 72, fixing ring two; 73, sliding ring; 74, telescopic elastic rod three; 75, connecting rod; 76, limiting cylinder; 77, rotating ring; 78, inclined cutting block; 79, knocking plate. Detailed implementation mode The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0024] To make the drawings concise, only the parts related to the invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0025] In this article, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0027] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0028] In addition, in the description of this application, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0029] As Figures 1 to 8 shown, it shows a multi-stage tail gas absorption tower in an embodiment of the present invention, including an adsorption tower 1. A tail gas pipe 2 is fixedly penetrated through the surface of the adsorption tower 1. An exhaust pipe 3 is fixedly penetrated through the surface of the adsorption tower 1. An air outlet fan 4 is fixedly installed at one end of the exhaust pipe 3 away from the adsorption tower 1. A pretreatment device for pre-treating tail gas is arranged on the circumferential surface of the adsorption tower 1. The pretreatment device includes a motor 51, and the motor 51 is fixedly installed on the circumferential surface of the adsorption tower 1. A rotating shaft 52 is rotatably penetrated through the surface of the adsorption tower 1. A spraying ring 53 is fixedly installed on the inner wall of the adsorption tower 1. A circulating pipe 54 is fixedly penetrated through the surface of the spraying ring 53. A fan 55 is fixedly installed on the circumferential surface of the rotating shaft 52. A drying box 56 is fixedly installed on the inner wall of the adsorption tower 1. A rotating plate 57 is fixedly installed on the circumferential surface of the rotating shaft 52. A drying cylinder 58 is rotatably installed on the inner wall of the rotating plate 57. A stirring ring 59 is fixedly installed on the circumferential surface of the drying cylinder 58. A first turntable 510 is fixedly installed on the circumferential surface of the drying cylinder 58. A rotating column 511 is rotatably penetrated through the surface of the tail gas pipe 2. A filter rack 512 is sleeved on the circumferential surface of the rotating column 511. A threaded rod 513 is rotatably penetrated through the surface of the tail gas pipe 2. A first telescopic elastic rod 514 is fixedly installed on the surface of the rotating column 511. A sliding plate 515 is sleeved on the circumferential surface of the threaded rod 513. A second turntable 516 is fixedly installed at one end of the threaded rod 513 away from the filter rack 512. A scraper 517 is rotatably penetrated through the surface of the tail gas pipe 2. When the motor 51 rotates, it drives the second transmission belt to rotate. The rotation of the first transmission belt drives the scraper 517 to rotate. At this time, the rotation of the scraper 517 cleans the filter rack 512 whose previous surface is blocked by impurities.

[0030] In some examples, the inside of the rotating shaft 52 is hollow. Nozzles for spraying tail gas are arranged on the inner wall of the spraying ring 53. One end of the circulating pipe 54 away from the spraying ring 53 is fixedly penetrated through the surface of the adsorption tower 1. A first transmission belt is in transmission connection between the output end of the motor 51 and the rotating shaft 52. A first spring for resetting is arranged between the tail gas pipe 2 and the rotating column 511. The second turntable 516 rotates to contact the rotating column 511 and drives the rotating column 511 to rotate. The rotation of the rotating column 511 inserts the next filter rack 512 into the inside of the tail gas pipe 2.

[0031] The angle of the drying cylinder 58 is set to an inclination angle. The first turntable 510 is in contact with the circumferential surface of the drying cylinder 58. The filter rack 512 is slidably connected to the threaded rod 513. The filter rack 512 is threadedly connected to the threaded rod 513. The stirring ring 59 is slidably connected to the inner wall of the drying box 56. One end of the threaded rod 513 away from the second turntable 516 is sleeved with the filter rack 512. The tail gas enters the tail gas pipe 2. The tail gas passes through the surface of the filter rack 512. At this time, the large-particle impurities in the tail gas are intercepted and adsorbed by the filter rack 512.

[0032] The free end of the first telescopic spring rod 514 is fixedly connected to the surface of the filter rack 512. The sliding plate 515 is fixedly connected to the free end of the first telescopic spring rod 514. The second turntable 516 is in contact with the rotating column 511. There is a second transmission belt connected between the output end of the motor 51 and the scraper 517. The rotation of the first transmission belt drives the scraper 517 to rotate. At this time, the scraper 517 rotates to clean the filter rack 512 whose previous surface was blocked by impurities. The first turntable 510 is in contact with the inner wall of the drying box 56.

[0033] For example, as Figures 1 to 8 shown, the tail gas is inhaled through the tail gas pipe 2. The tail gas enters the interior of the tail gas pipe 2. The tail gas passes through the surface of the filter rack 512. At this time, the large-particle impurities in the tail gas are intercepted and adsorbed by the filter rack 512, effectively intercepting the large-particle impurities in the tail gas and achieving preliminary purification. When the filter rack 512 is blocked by the large-particle impurities in the tail gas, at this time, the activated carbon box 61 moves downward under the action of air pressure. At the same time, the downward movement of the filter rack 512 drives the threaded rod 513 to move. Since the threaded rod 513 is threadedly connected to the tail gas pipe 2, the threaded rod 513 moves downward and rotates under the action of the filter rack 512. The rotation of the threaded rod 513 drives the second turntable 516 to rotate. Since the second turntable 516 is in contact with the circumferential surface of the rotating column 511, and at the same time, the second turntable 516 rotates to contact the rotating column 511 and drives the rotating column 511 to rotate. The rotation of the rotating column 511 inserts the next filter rack 512 into the interior of the tail gas pipe 2, realizing the automatic replacement of the filter rack 512 when it is blocked without manual intervention, ensuring the continuous operation of the equipment and improving the operation efficiency. At the same time, when the motor 51 rotates, it drives the second transmission belt to rotate, and the rotation of the first transmission belt drives the scraper 517 to rotate. At this time, the scraper 517 rotates to clean the filter rack 512 whose previous surface was blocked by impurities, achieving the replacement, cleaning and regeneration effect of the filter rack 512, realizing the recycling and reuse of the filter element, reducing the consumable cost, avoiding the time-consuming and laborious manual cleaning, and further increasing the equipment downtime, thus affecting the operation efficiency of the equipment. And the lime water filtered at the bottom of the adsorption tower 1 will be pumped back into the interior of the spray ring 53 through the circulation pipe 54, realizing the recycling of the lime water, reducing the waste of chemicals, reducing the operation cost, and at the same time strengthening the resource recycling efficiency and reducing the waste water discharge.

[0034] When the tail gas pretreated by the tail gas pipe 2 enters the interior of the adsorption tower 1, the spray ring 53 is started at this time. The spray ring 53 sprays lime water through the nozzles to spray the tail gas. At this time, the tail gas reacts with the lime water, and the reaction of the tail gas is carried to the bottom of the adsorption tower 1 by the lime water. The remaining gas is deeply purified and adsorbed through the activated carbon box 61. Subsequently, the purified gas floats upward. At the same time, the rotating shaft 52 rotates under the action of the motor 51. The rotation of the rotating shaft 52 drives the rotating plate 57 to rotate, and the rotation of the rotating plate 57 drives the drying cylinder 58 to rotate. The rotation of the drying cylinder 58 dries the moisture-absorbing particles inside the drying box 56. At the same time, because the first turntable 510 contacts the inner wall of the drying box 56, the drying cylinder 58 rotates around the rotating shaft 52 to drive the first turntable 510 to rotate. At this time, the first turntable 510 rotates in contact with the inner wall of the drying box 56 under the action of the drying cylinder 58. Because the first turntable 510 contacts the drying cylinder 58 at the other end, the rotation of the first turntable 510 drives the drying cylinder 58 to rotate. At this time, the drying cylinder 58 rotates around its own axis while revolving, further improving the drying effect or efficiency of the drying cylinder 58 on the moisture-absorbing particles inside the drying box 56, quickly desorbing the moisture of the moisture-absorbing particles, restoring the moisture-absorbing ability, and extending the service life. At the same time, the rotation of the drying cylinder 58 drives the stirring ring 59 to rotate. The rotation of the stirring ring 59 stirs the moisture-absorbing particles accumulated inside the drying box 56, increasing the contact area between the moisture-absorbing particles and the drying cylinder 58. At the same time, it prevents the moisture-absorbing particles inside the drying box 56 from becoming wet on the surface due to inhaling a large amount of moisture during operation, and breaks the adhesion between the particles, avoiding the occurrence of caking, sticking or accumulation, thereby affecting the dehumidification effect and efficiency of the tail gas, making the particles fully dispersed, fully contacting the moisture in the tail gas, improving the moisture absorption rate, and at the same time reducing the frequency of manual material turning or particle replacement due to caking, reducing the operation and maintenance cost.

[0035] As Figures 1 to 8 shown, it shows that in another embodiment of the present invention, a cleaning device for cleaning the activated carbon box 61 and the spray ring 53 under specific circumstances is provided on the inner wall of the adsorption tower 1. The cleaning device includes the activated carbon box 61. The activated carbon box 61 is slidably installed on the inner wall of the adsorption tower 1. A toothed disc 62 is fixedly installed on the circumferential surface of the rotating shaft 52. A scraping wheel 63 is slidably connected to the top of the activated carbon box 61. A fixed rod 64 is fixedly installed on the top of the activated carbon box 61. A scraping ring 65 is fixedly installed on the circumferential surface of the fixed rod 64. A first fixed ring 66 is fixedly installed on the inner wall of the adsorption tower 1. A second telescopic elastic rod 67 is fixedly installed on the surface of the scraping ring 65. The rotation of the drying cylinder 58 dries the moisture-absorbing particles inside the drying box 56. At the same time, because the first turntable 510 contacts the inner wall of the drying box 56. In some examples, the scraping wheel 63 is sleeved on the circumferential surface of the rotating shaft 52. Tooth blocks for docking and meshing with the tooth disc 62 are provided at the bottom of the scraping wheel 63. The scraping wheel 63 meshes with the tooth disc 62. When the scraping wheel 63 moves, it drives the tooth blocks to move downward until they contact and mesh with the second fixing ring 72. At this time, the tooth disc 62 rotates under the action of the rotating shaft 52, driving the scraping wheel 63 to rotate.

[0036] The free end of the second telescopic elastic rod 67 is fixedly connected to the bottom of the first fixing ring 66. Cleaning bristles for preventing blockage of the nozzle are provided on the circumferential surface of the scraping ring 65. When the fixing rod 64 moves, it drives the scraping ring 65 to move downward, and the scraping ring 65 moves downward to clean the surface of the spraying ring 53.

[0037] A feeding device for feeding agents into the equipment is provided at the top of the scraping wheel 63. The feeding device includes a threaded cylinder 71. The threaded cylinder 71 is fixedly installed at the top of the scraping wheel 63. A second fixing ring 72 is sleeved on the circumferential surface of the threaded cylinder 71. A sliding ring 73 is slidably installed on the circumferential surface of the threaded cylinder 71. A third telescopic elastic rod 74 is fixedly installed on the circumferential surface of the second fixing ring 72. A connecting rod 75 is fixedly installed at the top of the sliding ring 73. A limiting cylinder 76 is fixedly installed at one end of the connecting rod 75 away from the sliding ring 73. A rotating ring 77 is fixedly installed at the end of the threaded cylinder 71 away from the scraping wheel 63. An inclined cutting block 78 is fixedly installed at the top of the rotating ring 77. A knocking plate 79 is sleeved on the circumferential surface of the rotating shaft 52. The inclined cutting block 78 rotates to contact and squeeze the knocking plate 79 to move upward. At this time, the knocking plate 79 moves upward under the action of the inclined cutting block 78 to knock the surface of the spraying ring 53.

[0038] The free end of the third telescopic elastic rod 74 is slidably connected to the sliding ring 73. The sliding ring 73 is threadedly connected to the threaded cylinder 71. A limiting opening for limiting feeding by contacting the surface of the rotating shaft 52 is provided on the circumferential surface of the limiting cylinder 76. The limiting cylinder 76 moves until the limiting opening provided on its surface coincides with the discharging opening on the surface of the rotating shaft 52.

[0039] A discharging opening for feeding is provided on the circumferential surface of the rotating shaft 52. A first arc surface for squeezing the knocking plate 79 to move upward is provided on the surface of the inclined cutting block 78. The knocking plate 79 and the connecting rod 75 penetrate through each other slidably. A second spring for resetting is provided between the rotating ring 77 and the knocking plate 79. When the rotating ring 77 rotates, it drives the inclined cutting block 78 to rotate, and the inclined cutting block 78 rotates to contact and squeeze the knocking plate 79 to move upward.

[0040] For example, such as Figures 1 to 8As shown, when the surface filter holes of the activated carbon box 61 are blocked by particles in the tail gas during long-term operation, the activated carbon box 61 will then move downward under the wind pressure generated by the fan 55. At the same time, the movement of the activated carbon box 61 drives the scraping wheel 63 to move downward, and the movement of the scraping wheel 63 drives the tooth block to move downward until it contacts and meshes with the second fixed ring 72. At this time, the tooth disc 62 rotates under the action of the rotating shaft 52 to drive the scraping wheel 63 to rotate. The rotation of the scraping wheel 63 scrapes and cleans the impurity particles attached to or blocked on the surface of the activated carbon box 61, achieving the cleaning only when the surface of the activated carbon box 61 is blocked by impurity particles in the tail gas, avoiding damage to the surface of the activated carbon box 61 caused by always scraping and cleaning its surface, thereby affecting the working efficiency and effect of the activated carbon box 61. Moreover, cleaning the surface of the activated carbon box 61 enables the activated carbon box 61 to always maintain a good working state, thereby improving the purification and adsorption efficiency of the activated carbon box 61, reducing mechanical wear during daily operation, and extending the service life of the activated carbon box 61.

[0041] At the same time, the activated carbon box 61 moves downward under the action of the wind pressure to drive the fixed rod 64 to move. The fixed rod 64 moves under the action of the activated carbon box 61. At the same time, the movement of the fixed rod 64 drives the scraping ring 65 to move downward. The downward movement of the scraping ring 65 cleans the surface of the spray ring 53. The salt substances generated by the reaction of the tail gas with the lime water are easily crystallized and attached to the surface of the spray ring 53, resulting in nozzle blockage or pipeline corrosion, and then causing the spray ring 53 to fail to work properly or component corrosion, thereby reducing the service life of the equipment. At the same time, it reduces the risk of rust of metal components, extends the service life of the spray system, and reduces the shutdown and maintenance costs caused by equipment corrosion.

[0042] When the scraping wheel 63 rotates under the action of the tooth disc 62 to drive the threaded cylinder 71 to rotate, since the threaded cylinder 71 is threadedly connected to the sliding ring 73, the rotation of the threaded cylinder 71 drives the sliding ring 73 to move upward. At the same time, the upward movement of the sliding ring 73 drives the connecting rod 75 to move. The upward movement of the connecting rod 75 drives the limiting cylinder 76 to move. At this time, the limiting cylinder 76 moves until the limiting port opened on its surface coincides with the discharge port on the surface of the rotating shaft 52. At this time, the feeding of the agent on the inner wall of the adsorption tower 1 is realized. This agent is only fed when the activated carbon box 61 is blocked, avoiding unnecessary waste caused by feeding during operation. At the same time, since the degree of blockage indirectly reflects the tail gas pollution load, the self-adaptive matching of the treatment agent for overloaded pollution is realized, improving the treatment efficiency while reducing the consumption of the agent.

[0043] Meanwhile, the threaded cylinder 71 rotates under the action of the sliding ring 73 to drive the rotating ring 77 to rotate. The rotation of the rotating ring 77 drives the inclined cutting block 78 to rotate. The rotation of the inclined cutting block 78 contacts and presses the knocking plate 79 to move upward. At this time, the knocking plate 79 moves upward under the action of the inclined cutting block 78 to knock on the surface of the spray ring 53. At this time, the spray ring 53 vibrates under the action of the knocking plate 79. The vibration of the spray ring 53 effectively avoids the blockage of the nozzles on its surface by the tail gas particles, thereby affecting its operation efficiency, and can inhibit the accumulation of impurities inside the nozzles, further reducing the shutdown and maintenance costs caused by equipment corrosion.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A multi-stage tail gas absorption tower, comprising an adsorption tower (1), characterized in that: The surface of the adsorption tower (1) is fixedly penetrated by an exhaust pipe (2), and the surface of the adsorption tower (1) is fixedly penetrated by an exhaust duct (3). One end of the exhaust duct (3) far from the adsorption tower (1) is fixedly installed with an exhaust fan (4). A pretreatment device for pre-treating the tail gas is arranged on the circumferential surface of the adsorption tower (1). The pretreatment device includes a motor (51), and the motor (51) is fixedly installed on the circumferential surface of the adsorption tower (1). A rotating shaft (52) is rotatably penetrated through the surface of the adsorption tower (1). A spray ring (53) is fixedly installed on the inner wall of the adsorption tower (1). A circulation pipe (54) is fixedly penetrated through the surface of the spray ring (53). A fan (55) is fixedly installed on the circumferential surface of the rotating shaft (52). A drying box (56) is fixedly installed on the inner wall of the adsorption tower (1). A rotating plate (57) is fixedly installed on the circumferential surface of the rotating shaft (52). A drying cylinder (58) is rotatably installed on the inner wall of the rotating plate (57). A stirring ring (59) is fixedly installed on the circumferential surface of the drying cylinder (58). A first turntable (510) is fixedly installed on the circumferential surface of the drying cylinder (58). A rotating column (511) is rotatably penetrated through the surface of the exhaust pipe (2). A filter rack (512) is sleeved on the circumferential surface of the rotating column (511). A threaded rod (513) is rotatably penetrated through the surface of the exhaust pipe (2). A first telescopic elastic rod (514) is fixedly installed on the surface of the rotating column (511). A sliding plate (515) is sleeved on the circumferential surface of the threaded rod (513). A second turntable (516) is fixedly installed at one end of the threaded rod (513) far from the filter rack (512). A scraper (517) is rotatably penetrated through the surface of the exhaust pipe (2).

2. The multistage tail gas absorption tower according to claim 1, wherein: The inside of the rotating shaft (52) is hollow. Nozzles for spraying the tail gas are arranged on the inner wall of the spray ring (53). One end of the circulation pipe (54) far from the spray ring (53) is fixedly penetrated through the surface of the adsorption tower (1). A first transmission belt is arranged between the output end of the motor (51) and the rotating shaft (52). A first spring for resetting is arranged between the exhaust pipe (2) and the rotating column (511).

3. The multi-stage tail gas absorption tower according to claim 2, wherein: The angle of the drying cylinder (58) is set as an inclination angle. The first turntable (510) is in contact with the circumferential surface of the drying cylinder (58). The filter rack (512) is slidably connected with the threaded rod (513). The filter rack (512) is threadedly connected with the threaded rod (513). The stirring ring (59) is slidably connected with the inner wall of the drying box (56). One end of the threaded rod (513) far from the second turntable (516) is sleeved with the filter rack (512).

4. The multi-stage tail gas absorption tower according to claim 3, characterized in that: The free end of the telescopic elastic rod 1 (514) is fixedly connected to the surface of the filter frame (512), the sliding plate (515) is fixedly connected to the free end of the telescopic elastic rod 1 (514), the turntable 2 (516) is in contact with the rotating column (511), a transmission belt 2 is connected between the output end of the motor (51) and the scraper (517), and the turntable 1 (510) is in contact with the inner wall of the drying box (56).

5. The multi-stage tail gas absorption tower according to claim 4, characterized in that: The inner wall of the adsorption tower (1) is provided with a cleaning device for cleaning the activated carbon box (61) and the spray ring (53) under specific circumstances, the cleaning device comprising an activated carbon box (61), the activated carbon box (61) being slidably mounted on the inner wall of the adsorption tower (1), a toothed disc (62) being fixedly mounted on the circumferential surface of the rotating shaft (52), a scraper wheel (63) being slidably connected to the top of the activated carbon box (61), a fixing rod (64) being fixedly mounted on the top of the activated carbon box (61), a scraper ring (65) being fixedly mounted on the circumferential surface of the fixing rod (64), a fixing ring 1 (66) being fixedly mounted on the inner wall of the adsorption tower (1), and a telescopic elastic rod 2 (67) being fixedly mounted on the surface of the scraper ring (65).

6. The multi-stage tail gas absorption tower according to claim 5, characterized in that: The scraper wheel (63) is sleeved with the circumferential surface of the rotating shaft (52); a tooth block for docking and meshing with the toothed disc (62) is provided at the bottom of the scraper wheel (63); and the scraper wheel (63) meshes with the toothed disc (62).

7. The multi-stage tail gas absorption tower according to claim 6, characterized in that: The free end of the second telescopic elastic rod (67) is fixedly connected to the bottom of the first fixing ring (66), and the circumferential surface of the scraper ring (65) is provided with bristles for cleaning the nozzle to prevent clogging.

8. A multi-stage tail gas absorption tower according to claim 7, characterized in that: A feeding device for feeding materials into the equipment is arranged at the top of the scraper wheel (63), and the feeding device comprises a threaded barrel (71), the threaded barrel (71) is fixedly mounted on the top of the scraper wheel (63), a second fixing ring (72) is sleeved on the circumferential surface of the threaded barrel (71), a sliding ring (73) is slidably mounted on the circumferential surface of the threaded barrel (71), a third telescopic elastic rod (74) is fixedly mounted on the circumferential surface of the second fixing ring (72), a connecting rod (75) is fixedly mounted on the top of the sliding ring (73), a limiting barrel (76) is fixedly mounted on one end of the connecting rod (75) away from the sliding ring (73), a rotating ring (77) is fixedly mounted on one end of the threaded barrel (71) away from the scraper wheel (63), a chamfered block (78) is fixedly mounted on the top of the rotating ring (77), and a knocking plate (79) is sleeved on the circumferential surface of the rotating shaft (52).

9. The multi-stage tail gas absorption tower according to claim 8, characterized in that: The free end of the telescopic elastic rod (74) is slidably connected to the sliding ring (73), the sliding ring (73) is threadedly connected to the threaded cylinder (71), and the circumferential surface of the limiting cylinder (76) is provided with a limiting opening for contacting the surface of the rotating shaft (52) to limit the position for feeding.

10. A multi-stage tail gas absorption tower according to claim 9, characterized in that: The circumferential surface of the rotating shaft (52) is provided with a discharge port for feeding materials. The surface of the inclined cutting block (78) is provided with a first arc surface for the upward movement of the extrusion and knocking plate (79). The knocking plate (79) slides through the connecting rod (75). A second spring for resetting is arranged between the rotating ring (77) and the knocking plate (79).

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