A chemical tail gas absorption device

Abstract

The present invention relates to the field of filtering and separation technology, and in particular to a chemical tail gas absorption device. A chemical tail gas absorption device, which denitrates flue gas, comprises a reactor and a catalytic mechanism. The catalytic mechanism comprises a support tube assembly, a filter tube and a cleaning assembly; each support tube assembly comprises a plurality of support tubes, each support tube comprises an inner tube and an outer tube, a catalyst is arranged between the inner tube and the outer tube, and a plurality of air holes are arranged on the inner tube and the outer tube. The filter tube is sleeved on the outer side of the support tube, and the mixed gas introduced into the reactor first passes through the filter tube and then reacts under the catalysis of the catalyst before being discharged upward from the inside of the inner tube of the support tube. The cleaning assembly is used to separate the plurality of support tubes when cleaning is required, and then drive the plurality of support tubes to move synchronously in the vertical direction relative to the filter tube, and introduce gas into the interior of the inner tube to back-blow the inner wall of the filter tube, so as to facilitate the cleaning of the filter tube and avoid the reaction efficiency being affected by the clogging of the filter holes on the filter tube.

Description

Technical Field

[0001] The invention relates to the technical field of filtration and separation, and in particular to a chemical tail gas absorption device. Background Art

[0002] SO2 released by coal combustion in my country accounts for 87% of the country's total emissions, NOx accounts for 67%, dust accounts for 60%, and CO2 accounts for 71%. Selective catalytic reduction (SCR) denitrification technology refers to the reaction of the reducing agent (liquid ammonia) with nitrogen oxides in the flue gas under the action of a catalyst to generate harmless nitrogen and water, thereby removing NOx from the flue gas. Liquid ammonia is evaporated and gasified through an evaporator before being injected into the flue gas of the SCR system; the gasified ammonia is mixed with dilution air and sprayed into the flue gas upstream of the SCR reactor through an ammonia spray grid; the fully mixed reducing agent and flue gas react under the action of the catalyst in the SCR reactor to generate harmless nitrogen and water, thereby removing NOx from the flue gas. Since the entire denitrification reaction is carried out at high temperature, the generated water is discharged in gaseous form.

[0003] During the denitration process, impurities in the mixed gas will adhere to the support frame equipped with the catalyst. If the impurities are not removed, it is easy to cause the catalyst pores to be blocked, reducing the contact between the catalyst and the mixed gas of flue gas and ammonia, reducing the catalytic efficiency, and affecting the denitration effect. In this regard, the invention patent with the authorization announcement number CN105214496B provides an integrated dust removal and denitration device. Although this device has a dust removal function, it cannot ensure that the mixed gas passes through the filter screen evenly and then contacts the catalyst layer evenly. Moreover, since the gas passing through the filter is closer to the outside, a part of the mixed gas will pass through the catalyst layer directly before it can react. The catalytic effect of the catalyst layer is not fully exerted, and the denitration effect is poor. Summary of the invention

[0004] The invention provides a chemical tail gas absorption device to solve the problem that the existing denitration device has low denitration efficiency and poor effect.

[0005] A chemical tail gas absorption device of the present invention adopts the following technical scheme:

[0006] A chemical tail gas absorption device for denitrifying flue gas comprises a reactor and a catalytic mechanism. The reactor is provided with an air inlet for introducing a mixed gas composed of flue gas and ammonia, and an air outlet for discharging the gas generated after the reaction.

[0007] The catalytic mechanism includes a support cylinder assembly, a filter cylinder and a cleaning assembly; each support cylinder assembly includes a plurality of support cylinders, and the plurality of support cylinders are coaxially arranged in the reactor in sequence along the vertical direction, and two adjacent support cylinders are connected by hinges so that the two adjacent support cylinders can move relative to each other within a first preset range, and the two adjacent support cylinders are in contact when denitrifying the flue gas, and each support cylinder includes an inner cylinder and an outer cylinder, and the two ends of the inner cylinder are respectively fixedly connected to the two ends of the outer cylinder, and the catalyst is arranged between the inner cylinder and the outer cylinder, and a plurality of air holes are arranged on the inner cylinder and the outer cylinder.

[0008] The filter cartridge is sleeved on the outside of the support cartridge. The mixed gas introduced into the reactor first passes through the filter cartridge and then reacts under the catalysis of the catalyst before being discharged upward from the inside of the inner cartridge of the support cartridge.

[0009] The cleaning assembly is used to separate the multiple support cylinders when cleaning is required, and then drive the multiple support cylinders to move synchronously in the vertical direction relative to the filter cylinder, and introduce gas into the interior of the inner cylinder.

[0010] Furthermore, the filter cartridge is a pleated filter screen that can be compressed and extended within a second preset range in the up and down directions. The upper end of the filter cartridge is fixed in height, and the lower end is movable relative to the reactor. A retaining ring is connected to the lower end of the filter cartridge, and the upper end of the retaining ring is abutted against the lower end of the support cartridge at the bottom. In the initial state, multiple support cartridges are in a separated state, and each hinge is opened to a preset limit angle. The dust cleaning assembly includes a transmission member, a pulling member and a blowing member. The transmission member includes a plurality of rotating rods, each rotating rod vertically penetrates through the plurality of support cartridges and the lower end extends to the retaining ring. A threaded hole is provided on the retaining ring, and a spiral groove that cooperates with the spiral transmission of the threaded hole is provided on the circumferential wall at the lower part of each rotating rod. The rotating rod can rotate The movable structure is configured such that when the rotating rod rotates forward, the baffle ring is driven to rise. When the baffle ring rises, the support cylinder below is pushed to approach the support cylinder above it in sequence. When the rotating rod is reversed at the initial position, the support cylinder at the bottom is separated from the baffle ring. When denitrification is required, the rotating rod is first rotated forward to make two adjacent support cylinders contact and the filter cylinder is compressed. When dust removal is required, the rotating rod is reversed to reset the multiple support cylinders and the filter cylinder, and then the rotating rod is continued to be reversed to separate the support cylinder at the bottom from the baffle ring. The pulling member is used to pull the multiple support cylinders to rise relative to the filter cylinder when the bottom support cylinder is separated from the baffle ring. The blowing member is used to blow air into the inside of the inner cylinder when the multiple support cylinders rise relative to the filter cylinder.

[0011] Furthermore, the catalytic mechanism includes a plurality of support cylinder assemblies; the plurality of support cylinder assemblies are uniformly distributed circumferentially around the axis of the reactor, and the number of filter cylinders and dust cleaning assemblies corresponds one to one to the number of support cylinder assemblies; the chemical tail gas absorption device also includes a rotating mechanism, which includes a mounting ring, a main rotating shaft, a sun gear, a gear ring, a support plate, a rotating ring and a planetary gear; the mounting ring is arranged inside the reactor, and the mounting ring includes an inner ring plate and an outer ring plate; the inner ring plate and the outer ring plate are fixedly connected and coaxially arranged, the inner ring plate is on the inner side of the outer ring plate, the inner ring plate is provided with a first ring groove, the inner ring plate is provided with a second ring groove, the rotating ring is rotatably installed between the inner ring plate and the outer ring plate, and the rotating ring The dynamic ring is a hollow structure, and a plurality of mounting holes which pass through the upper and lower parts are arranged on the rotating ring; the main rotating shaft is arranged coaxially with the reactor and passes through the center of the inner ring plate, the main rotating shaft is rotatably arranged around its own axis, the sun gear is fixedly installed on the main rotating shaft, the sun gear is located in the first ring groove, the ring gear is fixedly installed on the inner circumferential wall of the reactor, and the ring gear is located in the second ring groove; there are a plurality of planetary gears, each of which is rotatably installed in a mounting hole and is located inside the rotating ring, each planetary gear is respectively meshed with the ring gear and the sun gear, and when the main rotating shaft rotates, the sun gear drives the plurality of planetary gears to rotate and revolve around the sun gear, and the upper end of each of the filter cartridges is fixedly connected to the lower end of a driven gear.

[0012] Furthermore, the catalytic mechanism also includes a diverter plate, which is arranged above the mounting ring and fixedly connected to the rotating ring. The diverter plate is provided with a plurality of diverter holes, and the gas exhausted from the inner ring plate is discharged to the top of the diverter plate through the diverter holes.

[0013] Furthermore, the transmission part also includes multiple servo motors, which are installed on the diverter plate, and each servo motor is used to drive a rotating rod to rotate; the pulling part includes multiple electric push rods, each of which is fixedly connected to the support tube at the top of a support tube assembly, and is used to pull the support tube up and down; the blowing part includes an airbag, an electric telescopic rod and a pressure ring; there are multiple airbags, each of which is fixedly installed on the diverter plate, the airbag has resilience, and a one-way air intake valve and an air nozzle are provided on the airbag. The one-way air intake valve only allows external gas to enter the airbag, and the air nozzle extends from one end of the airbag to the inside of an inner tube; the electric telescopic rod is installed on the upper part of the diverter plate, and the pressure ring is fixedly installed on the upper end of the electric telescopic rod, and the lower surface of the pressure ring is in contact with the upper surface of each airbag, and the electric telescopic rod is used to drive the pressure ring to move up and down to squeeze the airbag.

[0014] Furthermore, the catalytic mechanism also includes a guide cover, which is funnel-shaped, with the large end of the guide cover located above the small end, the upper end of the guide cover fixedly connected to the upper end of the diverter plate, and the diverter plate is provided with a plurality of through holes, each of which is coaxial with an inner cylinder, the large end of each guide cover is fixedly mounted on the lower edge of the through hole, and the small end of each guide cover is inserted into the inner cylinder, and the air nozzle extends to the small end of the guide cover.

[0015] Furthermore, the catalytic mechanism also includes a plurality of ash collecting hoppers, each of which is fixedly mounted at the lower end of a filter cartridge for collecting impurities.

[0016] Furthermore, there are multiple catalytic mechanisms, and the multiple catalytic mechanisms are sequentially arranged in the reactor along the vertical direction, and the multiple catalytic mechanisms are aligned up and down.

[0017] Furthermore, the main rotating shafts of the multiple catalytic mechanisms are integrally formed, and the chemical tail gas absorption device also includes a motor, which is arranged outside the reactor and is used to drive the multiple main rotating shafts to rotate.

[0018] Furthermore, the pore size of the filter cartridge on each filter cartridge gradually decreases from bottom to top, and among the multiple filter cartridges aligned vertically, the pore size of the filter cartridge at the bottom is larger than the pore size of the filter hole at the top.

[0019] The beneficial effects of the present invention are as follows: a chemical tail gas absorption device of the present invention is provided with a support cylinder for filling the catalyst, and a filter screen is provided on the outside of the support cylinder, so that the mixed gas can be filtered through the filter cylinder before contacting the catalyst, and the solid impurities are blocked on the outside of the filter screen, thereby reducing the occurrence of clogging of the small holes of the catalyst, increasing the chance of contact between the mixed gas and the catalyst layer, and achieving a better catalytic effect. Furthermore, by providing a dust cleaning component to backflush the inner wall of the filter cylinder, it is easy to clean the filter cylinder, and avoid affecting the reaction efficiency due to clogging of the filter holes on the filter cylinder.

[0020] Since the filter is configured as a pleated filter, each support cylinder assembly includes a plurality of vertically arranged support cylinders. Through the cooperation of the transmission member, the pulling member and the blowing member of the dust cleaning assembly, when denitration is required, the rotating rod is first rotated forward so that two adjacent support cylinders are in contact and the filter cylinder is compressed; when dust removal is required, the rotating rod is reversed so that the plurality of support cylinders and the filter cylinder are reset, and then the rotating rod is further reversed so that the support cylinder at the bottom is separated from the retaining ring. When the support cylinder at the bottom is separated from the retaining ring, the plurality of support cylinders are caused to rise relative to the filter cylinder; when the plurality of support cylinders rise relative to the filter cylinder, air is blown into the interior of the inner cylinder to prevent the filter cylinder from being blocked by the support cylinder during the process of blowing air into the inner cylinder. In other words, the gas blown out from the blowing member can be blown from every position of the filter cylinder, and the dust cleaning efficiency is high.

[0021] The present invention provides a filter cartridge that can rotate and revolve, so that the gas can evenly enter all the small holes of the catalyst, so that the catalyst is fully utilized and the catalytic efficiency is significantly improved.

[0022] The present invention can improve the mixing effect of the gases generated by the reaction by arranging the guide cover and the diversion hole, thereby further enabling the ammonia gas and the flue gas to fully react under the action of the catalyst, thereby improving the catalytic effect.

[0023] The present invention reduces the flow rate of the gas and prolongs the time for the gas to pass through the catalyst by arranging multiple catalytic mechanisms, so that the mixed gas reacts more thoroughly when passing through the catalyst, thereby improving the catalytic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a chemical tail gas absorption device of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the internal mechanism of a reactor of an embodiment of a chemical tail gas absorption device of the present invention;

[0027] Figure 3 A partial cross-sectional view of an embodiment of a chemical tail gas absorption device of the present invention;

[0028] Figure 4 It is a structural schematic diagram of a catalytic mechanism of an embodiment of a chemical tail gas absorption device of the present invention;

[0029] Figure 5 for Figure 4 Exploded diagram of

[0030] Figure 6 It is a structural schematic diagram of a rotating mechanism of an embodiment of a chemical tail gas absorption device of the present invention;

[0031] Figure 7 It is a schematic structural diagram of a support cylinder assembly, a filter cylinder, an electric push rod and a servo motor of an embodiment of a chemical tail gas absorption device of the present invention;

[0032] Figure 8 A cross-sectional view of a support cylinder assembly and a filter cylinder of an embodiment of a chemical tail gas absorption device of the present invention;

[0033] Fig. 9 for Figure 3 Enlarged view of point A in the middle.

[0034] In the figure: 100, reactor; 120, air outlet; 130, air inlet; 140, support leg; 210, support chair; 220, main shaft; 230, drive motor; 300, inner ring plate; 310, outer ring plate; 320, gear ring; 330, planetary gear; 340, sun gear; 350, rotating ring; 351, mounting hole; 411, pressure ring; 412, electric telescopic rod; 420, servo motor; 430, electric push rod; 440, diverter plate; 441, diverter hole; 451, air bag; 452, ash hopper; 453, guide cover; 454, air nozzle; 455, air pipe; 500, support tube; 510, rotating rod; 520, filter tube; 530, connecting plate; 540, hinge; 550, retaining ring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] An embodiment of a chemical tail gas absorption device of the present invention is as follows Figures 1 to 9As shown, a chemical tail gas absorption device denitrates flue gas, including a reactor 100 and a catalytic mechanism. The reactor 100 is provided with an air inlet 130 for introducing a mixed gas composed of flue gas and ammonia, and an air outlet 120 for discharging the gas generated after the reaction. The catalytic mechanism includes a support cylinder assembly, a filter cylinder 520 and a ash cleaning assembly. Each support cylinder assembly includes a plurality of support cylinders 500, and the plurality of support cylinders 500 are coaxially arranged in the reactor 100 in the vertical direction in sequence. Two adjacent support cylinders 500 are connected by hinges 540, so that the two adjacent support cylinders 500 move relative to each other within a first preset range. Specifically, the hinge 540 is a common hinge in the prior art, so it is not repeated here. When the flue gas is denitrated, the two adjacent support cylinders 500 are in contact. Each support cylinder 500 includes an inner cylinder and an outer cylinder, and the two ends of the inner cylinder are respectively fixed to the two ends of the outer cylinder. The catalyst is arranged between the inner cylinder and the outer cylinder, and a plurality of pores are arranged on the inner cylinder and the outer cylinder. The filter cartridge 520 is sleeved on the outside of the support cartridge 500. The mixed gas introduced into the reactor 100 first passes through the filter cartridge 520 and then reacts with the catalyst before being discharged upward from the inner cylinder of the support cartridge 500 and then discharged from the gas outlet 120. The cleaning assembly is used to separate the multiple support cartridges 500 when cleaning is required, so that a gap is generated between two adjacent support cartridges 500, and then drive the multiple support cartridges 500 to move synchronously in the vertical direction relative to the filter cartridge 520, and introduce gas into the inner cylinder. The introduced gas passes through the gap between the support cartridges 500 to backflush the filter cartridge 520 to clean the filter cartridge 520 and avoid affecting the denitration efficiency due to clogging of the filter holes on the filter cartridge 520.

[0037] In this embodiment, the filter cartridge 520 is a pleated filter screen that can be compressed and extended within a second preset range in the up-down direction. The upper end height of the filter cartridge 520 is fixed, and the lower end is movable relative to the reactor 100. When the lower end of the filter cartridge 520 moves upward relative to the reactor 100, the filter cartridge 520 is compressed. A retaining ring 550 is connected to the lower end of the filter cartridge 520. The upper end of the retaining ring 550 abuts against the lower end of the support cartridge 500 at the bottom. In the initial state, the multiple support cartridges 500 are in a separated state, and each hinge 540 is opened to a preset limit angle. The dust cleaning assembly includes a transmission member, a pulling member, and a blowing member. The transmission member includes a plurality of rotating rods 510. Each rotating rod 510 vertically penetrates the multiple support cartridges 500 and the lower end extends to the retaining ring 550. The retaining ring 550 is provided with a threaded hole. The lower end of each rotating rod 510 is provided with a threaded hole. The peripheral wall of the part is provided with a spiral groove that cooperates with the spiral transmission of the threaded hole. The rotating rod 510 is rotatably arranged. When the rotating rod 510 rotates forward, the baffle ring 550 is driven to rise. When the baffle ring 550 rises, it pushes the support cylinder 500 below to approach the support cylinder 500 above it in sequence. When the rotating rod 510 is reversed at the initial position, the baffle ring 550 is separated from the support cylinder 500 at the bottom. When denitration is required, the rotating rod 510 is first rotated forward so that two adjacent support cylinders 500 are in contact and the filter cylinder 520 is compressed. When dust removal is required, the rotating rod 510 is reversed to reset the multiple support cylinders 500 and the filter cylinder 520, and then the rotating rod 510 is continued to be reversed to separate the support cylinder 500 at the bottom from the baffle ring 550. The pulling member is used to pull the multiple support cylinders 500 up relative to the filter cylinder 520 when the support cylinder 500 at the bottom is separated from the retaining ring 550; the blowing member is used to blow air into the interior of the inner cylinder when the multiple support cylinders 500 rise relative to the filter cylinder 520, to prevent the filter cylinder 520 from being blocked by the support cylinder 500 during the process of blowing air into the inner cylinder, that is, to enable the gas blown out from the blowing member to be blown out from each filter hole of the filter cylinder 520.

[0038] In this embodiment, the catalytic mechanism includes a plurality of support cylinder assemblies. The plurality of support cylinder assemblies are evenly distributed around the axis of the reactor 100, and the number of filter cylinders 520 and the number of cleaning assemblies corresponds to the number of support cylinder assemblies. A chemical tail gas absorption device of this embodiment also includes a rotating mechanism, which includes a mounting ring, a main shaft 220, a sun gear 340, a gear ring 320, a support plate, a rotating ring 350 and a planetary gear 330. The mounting ring is arranged inside the reactor 100, and the mounting ring includes an inner ring plate 300 and an outer ring plate 310. The inner ring plate 300 and the outer ring plate 310 are fixedly connected to the peripheral wall of the reactor 100 and are coaxially arranged with the reactor 100. The inner ring plate 300 is located on the inner side of the outer ring plate 310. A first ring groove is arranged inside the inner ring plate 300, and a second ring groove is arranged inside the outer ring plate 310. The rotating ring 350 is rotatably installed between the inner ring plate 300 and the outer ring plate 310. The rotating ring 350 is a hollow structure, and a plurality of mounting holes 351 that pass through the rotating ring 350 from top to bottom are arranged on the rotating ring 350. The main rotating shaft 220 is coaxially arranged with the reactor 100 and passes through the center of the inner ring plate 300. The main rotating shaft 220 is rotatably arranged around its own axis. The sun gear 340 is fixedly installed on the main rotating shaft 220 and is located in the first ring groove. The ring gear 320 is fixedly installed on the inner circumferential wall of the reactor 100 and is located in the second ring groove. There are multiple planetary gears 330, each of which is rotatably installed in a mounting hole 351 and is located inside the rotating ring 350. Each planetary gear 330 is respectively connected to the ring gear 320 and the sun gear 340. The positive gear 340 is meshed, and when the main shaft 220 rotates, it drives multiple planetary gears 330 to rotate and revolve around the sun gear 340 through the sun gear 340. The upper end of each filter cartridge 520 is fixedly connected to the lower end of a planetary gear 330. Specifically, a connecting plate 530 is installed on the upper end of the filter cartridge 520, and the upper end of the filter cartridge 520 is connected to the lower end of a planetary gear 330 through the connecting plate 530. The rotation of each planetary gear 330 is transmitted to the filter cartridge 520, so that the multiple filter cartridges 520 are in full contact with the mixed gas introduced into the reactor 100.

[0039] In this embodiment, the catalytic mechanism also includes a diverter plate 440, which is arranged above the mounting ring and fixedly connected to the rotating ring 350. A plurality of diverter holes 441 are provided on the diverter plate 440. The gas exhausted from the inner ring plate 300 is discharged to the top of the diverter plate 440 through the diverter holes 441, so that the gas generated after the reaction can be dispersed.

[0040] In this embodiment, the transmission member also includes a plurality of servo motors 420, each servo motor 420 is mounted on the diverter plate 440, and each servo motor 420 is used to drive a rotating rod 510 to rotate. The pulling member includes a plurality of electric push rods 430, each of which is fixedly connected to a support tube 500 at the top of a support tube assembly, and is used to pull the support tube 500 up and down. The blowing member includes an airbag 451, an electric telescopic rod 412 and a pressure ring 411. There are a plurality of airbags 451, each of which is fixedly mounted on the diverter plate 440, and the airbag 451 has resilience. A one-way air inlet valve and an air jet 454 are provided on the airbag 451, and the one-way air inlet valve only allows external gas to enter the airbag 451, and the air jet 454 is connected to the airbag 451 through an air pipe 455, and the air jet 454 extends to the inside of an inner tube away from one end of the airbag 451. The electric telescopic rod 412 is installed on the upper part of the diverter plate 440, and the pressure ring 411 is fixedly installed on the upper end of the electric telescopic rod 412, and the lower surface of the pressure ring 411 contacts the upper surface of each airbag 451. The electric telescopic rod 412 is used to drive the pressure ring 411 to move up and down to squeeze the airbag 451, so that the gas in the airbag 451 is discharged to the inside of the support tube 500, and the filter tube 520 is backblown to remove impurities on the filter tube 520.

[0041] In this embodiment, the catalytic mechanism also includes a guide cover 453, which is funnel-shaped, with the large end of the guide cover 453 located above the small end, and the upper end of the guide cover 453 is fixedly connected to the upper end of the diverter plate 440. The diverter plate 440 is provided with a plurality of through holes, each of which is coaxial with an inner cylinder. The large end of each guide cover 453 is fixedly mounted on the lower edge of the through hole, and the small end of each guide cover 453 is inserted into the inner cylinder. The air nozzle 454 extends to the small end of the guide cover 453 to guide the gas generated by the reaction to be dispersed and discharged.

[0042] In this embodiment, the catalytic mechanism also includes a plurality of ash hoppers 452, each of which is fixedly mounted at the lower end of a filter cartridge 520 for collecting impurities. Since impurities may exist in the gas discharged from the airbag 451, the ash hopper 452 is provided for collecting ash.

[0043] In this embodiment, there are multiple catalytic mechanisms, and the multiple catalytic mechanisms are arranged in sequence in the reactor 100 along the vertical direction, and the multiple catalytic mechanisms are aligned up and down. When denitrification is carried out, since the impurities in the mixed gas cannot be completely reacted after one reaction, the gas generated after the reaction still contains impurities and mixed gas that have not participated in the reaction. Therefore, by setting up multiple catalytic mechanisms, the reaction can be more complete and the denitrification effect can be better.

[0044] In this embodiment, the main rotating shafts 220 of the multiple catalytic mechanisms are integrally formed, and the chemical tail gas absorption device further includes a driving motor 230, which is disposed outside the reactor 100 and is used to drive the multiple main rotating shafts 220 to rotate. Specifically, the reactor 100 is supported by multiple supporting legs 140, and the driving motor 230 is supported by a supporting chair 210.

[0045] In this embodiment, the aperture of the filter cartridge 520 on each filter cartridge 520 gradually decreases from bottom to top, and among the multiple filter cartridges 520 aligned vertically, the aperture of the filter cartridge 520 at the bottom is larger than the aperture of the filter hole at the top, which is convenient for layered filtration of gases containing impurities of different particle sizes in the mixed gas.

[0046] The working principle and working process of a chemical tail gas absorption device in this embodiment are as follows:

[0047] During operation, the states of the support cylinder 500 and the filter cylinder 520 are first adjusted by the servo motor 420 and the electric push rod 430, so that the multiple support cylinders 500 of each support cylinder assembly are closely attached, and then the mixed gas of flue gas and ammonia is introduced into the air inlet 130. At the same time, the drive motor 230 is started, and the drive motor 230 drives the sun gear 340 to rotate through the main shaft 220, and the sun gear 340 drives the multiple planetary gears 330 to rotate and revolve around the sun gear 340. When the planetary gears 330 revolve, they drive the rotating ring 350 to rotate synchronously. When the planetary gears 330 rotate and revolve, they drive the filter cylinder 520 to rotate and revolve around the axis of the sun gear 340, so that the mixed gas can fully contact the catalyst in the support cylinder 500, thereby improving the denitration efficiency and effect.

[0048] The gas generated after the denitration reaction is discharged upward through the guide cover 453 and enters the top of the diverter plate 440 through the diverter hole 441. The gas entering the top of the diverter plate 440 reacts under the action of the catalyst at the corresponding position, further improving the denitration effect. The gas is discharged from the gas outlet 120 until it reaches the top.

[0049] When it is necessary to clean the impurities on the filter cartridge 520, the drive motor 230 is turned off, and the servo motor 420 is started, so that the servo motor 420 drives the rotating rod 510 to reverse, so that the filter cartridge 520 and the multiple support cartridges 500 of each support cartridge assembly return to the initial position, and at the same time, the air inlet 130 is closed, the air outlet 120 is closed, and the electric telescopic rod 412 and the electric push rod 430 are turned on. The electric telescopic rod 412 drives the pressure ring 411 to move downward to squeeze the air bag 451, and the gas inside the air bag 451 is discharged from the air nozzle 454 through the air pipe 455, and the air nozzle 454 blows air into the inside of the support cartridge 500. The electric push rod 430 moves to drive the multiple support cartridges 500 of a corresponding support cartridge assembly to move upward synchronously, so that the ejected gas can backflush each position inside the filter cartridge 520, and the impurities blocked by the inner peripheral wall of the filter cartridge 520 and the support cartridge 500 fall into the ash collecting hopper 452 below. After the backflush is completed, the airbag 451 and the support cylinder assembly are reset by controlling the electric telescopic rod 412 and the electric push rod 430, and at this time, a dust cleaning action is completed.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A chemical tail gas absorption device for denitrifying flue gas, characterized in that: It includes a reaction kettle and a catalytic mechanism; The reactor is provided with an air inlet for introducing a mixed gas consisting of flue gas and ammonia, and an air outlet for discharging the gas generated after the reaction; The catalytic mechanism includes a support cylinder assembly, a filter cylinder and a ash cleaning assembly; each support cylinder assembly includes a plurality of support cylinders, and the plurality of support cylinders are coaxially arranged in the reactor in sequence along the vertical direction, and two adjacent support cylinders are connected by hinges, so that the two adjacent support cylinders move relatively within a first preset range, and the two adjacent support cylinders are in contact when the flue gas is denitrated, and each support cylinder includes an inner cylinder and an outer cylinder, and the two ends of the inner cylinder are respectively fixedly connected to the two ends of the outer cylinder, and the catalyst is arranged between the inner cylinder and the outer cylinder, and a plurality of air holes are arranged on the inner cylinder and the outer cylinder; The filter cartridge is sleeved on the outside of the support cartridge. The mixed gas introduced into the reactor first passes through the filter cartridge and then reacts under the catalysis of the catalyst before being discharged upward from the inner cylinder of the support cartridge. The dust cleaning assembly is used to separate the multiple support cylinders when dust cleaning is required, and then drive the multiple support cylinders to move synchronously in the vertical direction relative to the filter cylinder, and introduce gas into the interior of the inner cylinder; The filter cartridge is a pleated filter screen that can be compressed and extended within a second preset range in the up and down directions. The upper end of the filter cartridge is fixed in height, and the lower end is movable relative to the reactor. A retaining ring is connected to the lower end of the filter cartridge, and the upper end of the retaining ring is abutted against the lower end of the support cartridge at the bottom. In the initial state, multiple support cartridges are in a separated state, and each hinge is opened to a preset limit angle. The dust cleaning assembly includes a transmission member, a pulling member and a blowing member. The transmission member includes a plurality of rotating rods, each rotating rod vertically penetrates the plurality of support cartridges and the lower end extends to the retaining ring. A threaded hole is provided on the retaining ring, and a spiral groove that cooperates with the spiral transmission of the threaded hole is provided on the peripheral wall at the lower part of each rotating rod. The rotating rod can rotate It is arranged that when the rotating rod rotates forward, it drives the baffle ring to rise, and when the baffle ring rises, it pushes the support cylinder below to approach the support cylinder above it in sequence, and when the rotating rod is reversed at the initial position, the support cylinder at the bottom is separated from the baffle ring; when denitrification is required, the rotating rod is first rotated forward to make two adjacent support cylinders contact and the filter cylinder is compressed; when dust removal is required, the rotating rod is reversed to reset the multiple support cylinders and the filter cylinder, and then the rotating rod is continued to be reversed to separate the support cylinder at the bottom from the baffle ring; the pulling member is used to pull the multiple support cylinders to rise relative to the filter cylinder when the bottom support cylinder is separated from the baffle ring; the blowing member is used to blow air into the inside of the inner cylinder when the multiple support cylinders rise relative to the filter cylinder.

2. The chemical tail gas absorption device according to claim 1, characterized in that: The catalytic mechanism includes a plurality of support cylinder assemblies; the plurality of support cylinder assemblies are evenly distributed circumferentially around the axis of the reactor, and the number of filter cylinders and dust cleaning assemblies corresponds one to one to the number of support cylinder assemblies; the chemical tail gas absorption device also includes a rotating mechanism, which includes a mounting ring, a main rotating shaft, a sun gear, a gear ring, a support plate, a rotating ring and a planetary gear; the mounting ring is arranged inside the reactor, and the mounting ring includes an inner ring plate and an outer ring plate; the inner ring plate and the outer ring plate are fixedly connected and coaxially arranged, the inner ring plate is on the inner side of the outer ring plate, the inner ring plate is provided with a first ring groove, the inner ring plate is provided with a second ring groove, the rotating ring is rotatably installed between the inner ring plate and the outer ring plate, and the rotating ring It is a hollow structure, and a plurality of mounting holes which pass through from top to bottom are arranged on the rotating ring; the main rotating shaft is arranged coaxially with the reactor and passes through the center of the inner ring plate, the main rotating shaft is rotatably arranged around its own axis, the sun gear is fixedly installed on the main rotating shaft, the sun gear is located in the first ring groove, the ring gear is fixedly installed on the inner circumferential wall of the reactor, and the ring gear is located in the second ring groove; there are a plurality of planetary gears, each of which is rotatably installed in a mounting hole and is located inside the rotating ring, each planetary gear is respectively meshed with the ring gear and the sun gear, and when the main rotating shaft rotates, the sun gear drives the plurality of planetary gears to rotate and revolve around the sun gear, and the upper end of each of the filter cartridges is fixedly connected to the lower end of a driven gear.

3. The chemical tail gas absorption device according to claim 2, characterized in that: The catalytic mechanism also includes a diverter plate, which is arranged above the mounting ring and fixedly connected to the rotating ring. The diverter plate is provided with a plurality of diverter holes, and the gas discharged from the inner ring plate is discharged to the top of the diverter plate through the diverter holes.

4. The chemical tail gas absorption device according to claim 3, characterized in that: The transmission member also includes multiple servo motors, which are installed on the diverter plate, and each servo motor is used to drive a rotating rod to rotate; the pulling member includes multiple electric push rods, each of which is fixedly connected to a support tube at the top of a support tube assembly, and is used to pull the support tube up and down; the blowing member includes an airbag, an electric telescopic rod and a pressure ring; there are multiple airbags, each of which is fixedly installed on the diverter plate, the airbag has resilience, and a one-way air intake valve and an air nozzle are provided on the airbag. The one-way air intake valve only allows external gas to enter the airbag, and the air nozzle extends from one end of the airbag to the inside of an inner tube; the electric telescopic rod is installed on the upper part of the diverter plate, and the pressure ring is fixedly installed on the upper end of the electric telescopic rod, and the lower surface of the pressure ring is in contact with the upper surface of each airbag, and the electric telescopic rod is used to drive the pressure ring to move up and down to squeeze the airbag.

5. The chemical tail gas absorption device according to claim 4, characterized in that: The catalytic mechanism also includes a guide cover, which is funnel-shaped, with the large end of the guide cover above the small end, the upper end of the guide cover is fixedly connected to the upper end of the diverter plate, and a plurality of through holes are arranged on the diverter plate, each through hole is coaxial with an inner cylinder, the large end of each guide cover is fixedly installed on the lower edge of the through hole, and the small end of each guide cover is inserted into the inner cylinder, and the air nozzle extends to the small end of the guide cover.

6. The chemical tail gas absorption device according to claim 1, characterized in that: The catalytic mechanism also includes a plurality of ash collecting hoppers, each of which is fixedly mounted at the lower end of a filter cartridge and is used to collect impurities.

7. The chemical tail gas absorption device according to any one of claims 2 to 6, characterized in that: There are multiple catalytic mechanisms, which are arranged in the reactor in sequence along the vertical direction, and are aligned up and down.

8. The chemical tail gas absorption device according to claim 7, characterized in that: The main rotating shafts of the multiple catalytic mechanisms are integrally formed. The chemical tail gas absorption device also includes a motor, which is arranged outside the reactor and is used to drive the multiple main rotating shafts to rotate.

9. The chemical tail gas absorption device according to claim 8, characterized in that: The pore size of the filter cartridge on each filter cartridge gradually decreases from bottom to top, and among the multiple filter cartridges aligned up and down, the pore size of the filter cartridge at the bottom is larger than the pore size of the filter hole at the top.

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