CN113289485B - Wet desulfurization system for synthesis ammonia feed gas - Google Patents
Wet desulfurization system for synthesis ammonia feed gas Download PDFInfo
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- CN113289485B CN113289485B CN202110540448.2A CN202110540448A CN113289485B CN 113289485 B CN113289485 B CN 113289485B CN 202110540448 A CN202110540448 A CN 202110540448A CN 113289485 B CN113289485 B CN 113289485B
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- desulfurizing tower
- drainage plate
- tower
- lime slurry
- annular partition
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 62
- 230000023556 desulfurization Effects 0.000 title claims abstract description 62
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 title abstract description 9
- 238000003786 synthesis reaction Methods 0.000 title abstract description 9
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 147
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 146
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 146
- 239000004571 lime Substances 0.000 claims abstract description 146
- 239000002994 raw material Substances 0.000 claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims description 118
- 238000005192 partition Methods 0.000 claims description 60
- 238000007790 scraping Methods 0.000 claims description 49
- 238000004140 cleaning Methods 0.000 claims description 39
- 238000005096 rolling process Methods 0.000 claims description 24
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 241000197194 Bulla Species 0.000 abstract 1
- 208000002352 blister Diseases 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 145
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 5
- 230000003749 cleanliness Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0808—Cleaning containers having tubular shape, e.g. casks, barrels, drums by methods involving the use of tools, e.g. by brushes, scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of wet desulfurization, in particular to a wet desulfurization system for synthesis ammonia feed gas, which comprises a desulfurization tower, a circulating tower, an air cooler, a motor, a demisting unit and a shower-reducing device; the circulating tower is arranged at one side of the desulfurizing tower, a liquid conveying pipe in the circulating tower is communicated with a liquid inlet pipe in the shower-drop device, and the liquid inlet pipe in the circulating tower is communicated with the bottom of the desulfurizing tower; through the cooperation between drainage plate, through-hole and the scraper blade, constantly lime thick liquid gathers drainage plate bottom, gathers at drainage plate bottom and forms lime thick liquid layer, and the raw materials gas gets into by the desulfurizing tower bottom, rises through the lime thick liquid layer through the through-hole, and the tympanic bulla goes out, and the motor rotates and drives the transmission shaft and rotate to drive the scraper blade motion, the scraper blade constantly scrapes the lime thick liquid of drainage plate bottom evenly and smears in drainage plate bottom, prevents that drainage plate bottom a part area lime thick liquid from reducing even consuming, improves the desulfurizing quality of desulfurizing tower, thereby improves the liquid gas reaction efficiency of desulfurizing tower.
Description
Technical Field
The invention belongs to the technical field of wet desulfurization, and particularly relates to a wet desulfurization system for synthesis ammonia feed gas.
Background
The wet desulfurizing process features that the desulfurizing system is set at the tail end of flue and behind the dust collector, and the desulfurizing process has reaction temperature lower than dew point, so that the desulfurized fume needs to be re-heated for being exhausted. Because of the gas-liquid reaction, the desulfurization reaction speed is high, the efficiency is high, the utilization rate of desulfurization additives is high, for example, when lime is used as a desulfurizing agent, the desulfurization rate of 90 percent can be achieved when Ca/S=1, and the method is suitable for flue gas desulfurization of large-scale coal-fired power plants. The current flue gas desulfurization technology in the non-electric power industry mainly comprises wet desulfurization, semi-dry desulfurization and dry desulfurization, wherein the wet desulfurization is divided into technologies of a calcium method, a sodium method, a magnesium method, a seawater method and the like according to different desulfurizing agents, and the main desulfurizing tower is in the forms of spray tower washing, packed bed washing, venturi washing and the like.
In the prior art, a technical scheme of a wet desulfurization system for synthesis ammonia feed gas also appears, for example, a chinese patent with application number CN2020109529872 discloses a wet desulfurization device, which comprises: the desulfurizing tower, and a flue gas inlet section, a desulfurizing efficiency improving component, a spraying layer and a mist removing layer which are sequentially arranged in the desulfurizing tower from bottom to top; a flue gas rectifying module is arranged in the desulfurization efficiency improving component; according to the technical scheme, the flue gas flow field distribution is interfered by the flue gas rectifying module, so that the flue gas flow field distribution and the spray droplet distribution tend to be consistent, and the contact strength and uniformity of the flue gas and the spray droplet are improved; the liquid drops sprayed out through the spraying layer are distributed to be high in the center of the spraying layer and low in the periphery of the spraying layer; the concentration distribution pattern of the flue gas and the spray liquid drops is consistent, so that the uniform mixing of gas and liquid is realized, and the desulfurization and dust removal efficiency is improved; however, the technical scheme has the defects that the flow field distribution of the flue gas is interfered by the rectifying module, the distribution area of the flue gas is enlarged, but the density of the flue gas in the desulfurizing tower is reduced, the key factors influencing the desulfurizing effect are the liquid-gas ratio, and the concept of the liquid-gas ratio in gas desulfurization is as follows: the liquid volume required to absorb 1m 3 of gas, i.e. L/g=q/1000:v (Nm 3/h); wherein Q is the lime slurry flow, V is the gas flow entering the absorber, and the lime slurry flow m 3/h is 1000 (L/h) gas flow (Nm 3/h) =liquid-gas ratio (L/m 3); lime slurry and gas flow are unchanged, gas density is reduced, excessive lime slurry contacts with gas, the water content of the gas can be increased, corrosion of subsequent equipment is increased, the burden of a demister is increased, the demister and a pipeline are blocked, the lifting force of the gas is reduced, and safe and stable operation of a desulfurization system is influenced.
In view of the above, the present invention proposes a wet desulfurization system for synthesis ammonia feed gas, which solves the above-mentioned problems.
Disclosure of Invention
In order to overcome the defects of the prior art and solve the problems of incomplete gas desulfurization reaction caused by uneven liquid-gas contact, small reaction area and incomplete contact under the condition of the specified liquid-gas ratio of the tower-type desulfurizing tower, the invention provides a wet desulfurizing system for synthesis ammonia feed gas.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a wet desulphurization system for synthesis ammonia feed gas, which comprises a desulphurization tower, a circulating tower, an air cooler, a motor, a demisting unit and a shower-reducing device; the circulating tower is arranged at one side of the desulfurizing tower, a liquid conveying pipe in the circulating tower is communicated with a liquid inlet pipe in the shower-drop device, and the liquid inlet pipe in the circulating tower is communicated with the bottom of the desulfurizing tower; the demisting unit is arranged at the top position in the desulfurizing tower, a shower-reducing device is arranged in the desulfurizing tower, and the shower-reducing device is positioned below the demisting unit; the air cooler is arranged on one side of the desulfurizing tower adjacent to the circulating tower; the motor is arranged at the bottom of the desulfurizing tower; the center of the bottom of the desulfurizing tower is rotationally connected with a transmission shaft, one end of the transmission shaft is positioned in the desulfurizing tower, the other end of the transmission shaft penetrates through the bottom of the desulfurizing tower and is positioned outside the desulfurizing tower, and the transmission shaft is fixedly connected with an output shaft in the motor; a group of drainage plates are uniformly and fixedly connected in the desulfurization tower, and each drainage plate is positioned below the shower-reducing device; one end of the transmission shaft positioned in the desulfurizing tower is rotationally connected with a drainage plate close to the shower lowering device; a group of through holes are uniformly formed in the drainage plate; the scraping rods are symmetrically arranged at the positions, located at the bottoms of the drainage plates, of the transmission shafts, each scraping rod is in contact with the bottoms of the drainage plates, and the transmission shafts drive the scraping rods to slightly scratch the bottoms of the drainage plates.
When the device is used, a motor, a circulating tower and a desulfurizing tower are started, the circulating tower conveys lime slurry to a shower-drop device through a pipeline, the lime slurry passes through the shower-drop device, shower-drop is carried out according to a specified liquid-gas ratio, namely, the flow rate m/h of the lime slurry is equal to L/h, gas flow Nm/h=liquid-gas ratio L/m, raw material gas is conveyed into the desulfurizing tower through an air inlet part of the desulfurizing tower, the gas temperature before the raw material gas enters the desulfurizing tower is higher than the degree, the raw material gas starts to rise to contact and wash the lime slurry discharged by the shower-drop device after entering the desulfurizing tower, and chemical reaction, namely SO+HO- & gtHSO absorption, caCO+HSO- & CaSO+CO+HO neutralization is generated; in the existing sieve plate tower technology, liquid enters from the top of a desulfurization tower, descends from plate to plate through an overflow pipe, and stores a lime slurry layer at the bottom of the plate, desulfurization is an endothermic reaction, the desulfurization tower is heated during operation, a part of lime slurry which does not flow down on a tower plate is solidified and reacts on the plate to form scale under the long-time operation, the desulfurization area is reduced, the desulfurization efficiency is reduced, and even the weight of the tower plate is increased to damage the tower plate and the desulfurization tower; through the cooperation between the drainage plate, the through holes and the scraping rods, lime slurry continuously gathers to the bottom of the drainage plate, a lime slurry layer is formed at the bottom of the drainage plate, raw gas enters from the bottom of the desulfurization tower, passes through the lime slurry layer through the through holes in a rising mode and bubbles out, and the motor rotates to drive the transmission shaft to rotate so as to drive the scraping rods to move; because the scraping rod is arranged, under the long-time working state, the lime slurry layer at the bottom of the drainage plate is scaled, the scraping rod is contacted with the drainage plate and moves along with the transmission shaft to scrape lime scale, so that the reduction of the desulfurization area caused by scaling is avoided, the desulfurization efficiency is reduced, and even the weight of the drainage plate is increased to damage the drainage plate and the desulfurization tower; sulfur dioxide in the raw material gas and a lime slurry layer are catalytically reacted to form calcium sulfate floccules, the floccules generated after the lime slurry reaction flow to or drip to the bottom of a desulfurizing tower under the influence of gravity, flow into a circulating tower along a pipeline, are conveyed to a shower-reducing device again after being treated by the circulating tower, are desulfurized, and the recycling of the lime slurry is increased; the reacted raw material gas continuously rises through the through holes until entering the demisting unit, and the demisting unit is discharged through the exhaust part of the desulfurizing tower after being treated.
Preferably, the cross sections of the drainage plate and the scraping rod are in a semicircular arc shape, the scraping rod is made of rubber, and the drainage plate is in a cover shape; the aperture of the through hole positioned at the top end of the drainage plate is larger than the aperture positioned at the bottom end of the drainage plate.
When the lime slurry flow guide plate is used, the sections of the flow guide plate and the scraping rod are semicircular, lime slurry is dropped on the flow guide plate and flows along the arc-shaped outer surface of the flow guide plate, when lime slurry flows, one through hole is formed in each path, a part of lime slurry penetrates through the through holes and is converged on the inner surface of the flow guide plate, the scraping rod is uniformly scraped on the inner surface of the flow guide plate, the flow distance of lime slurry is increased, the coverage area of a lime slurry layer is increased, the liquid-gas reaction area is increased, the reaction efficiency of a desulfurizing tower is increased, the lime slurry is prevented from dropping on the flat flow guide plate and directly flowing down through the through holes, the contact between the lime slurry and raw material gas is insufficient, and the reaction effect is reduced; through setting up the through-hole both ends aperture different, the through-hole is located the aperture on drainage board top, be greater than the aperture that is located the drainage board bottom, the lime thick liquid flows in the flow on through-hole top is greater than the flow that the through-hole bottom flows out, make store the fractional lime thick liquid in the through-hole, supply each through-hole bottom to flow out, assemble into the lime thick liquid layer, ensure that each through-hole bottom flows out the lime thick liquid, further increase the coverage area of lime thick liquid layer, increase the liquid gas reaction area, increase the reaction efficiency of desulfurizing tower, prevent that lime thick liquid flows the coverage area inhomogeneous, the volume that partial lime thick liquid flowed to the through-hole is less, make the through-hole bottom can't long-time outflow lime thick liquid, form the lime thick liquid layer.
Preferably, a group of grooves are uniformly formed in one of the adjacent scraping rods, and a rolling brush is rotationally connected in each groove through a rotating shaft; the rolling brushes are attached to the bottom ends of the drainage plates.
When the desulfurizing tower is used, the rolling brush is arranged, the lime slurry layer reacts with the raw gas, the lime slurry reacts into calcium sulfate floccules and is dripped at the bottom of the desulfurizing tower, the transmission shaft rotates to drive the scraping rod to move, the scraping rod drives the rolling brush to move, the rolling brush is attached to the bottom end of the drainage plate, the rolling brush is rubbed and rolled by the bottom end of the drainage plate, the bottom end of the drainage plate is uniformly and repeatedly smeared, the possibility that no lime slurry exists at the bottom of the drainage plate is prevented, the coverage area of the lime slurry layer is increased, the liquid-gas reaction area is increased, and the reaction efficiency of the desulfurizing tower is increased; owing to be provided with the roll brush, the roll brush rolls and glues and attach the brush and walk, and the dust debris that glues at the lime slurry liquid layer after calcium sulfate floccule and raw materials gas wash prevents that the raw materials gas from contacting when flowing, causes secondary pollution, leads to the reaction inhomogeneous, increases the cleanliness of lime slurry liquid layer to increase the cleanliness of raw materials gas.
Preferably, a group of annular partition plates are uniformly and fixedly connected to the inner wall of the desulfurizing tower, and the annular partition plates incline downwards; the top end of the annular partition plate is fixedly connected with the bottom end of the drainage plate, and through holes are formed in the contact positions of the drainage plate and the annular partition plate, so that downward flow of lime slurry in the annular partition plate through the through holes is realized; one end of the annular partition plate, which is far away from the inner wall of the desulfurizing tower, is positioned below the inside of the drainage plate; the inside of annular baffle is hollow, and the inside of annular baffle passes through the pipeline intercommunication with the air-cooler.
When the desulfurization tower is used, raw gas enters the desulfurization tower and rises upwards, the raw gas flows to the drainage plate through the inner ring of the annular partition plate, the diameter of the inner ring of the annular partition plate is smaller than that of the outer ring of the drainage plate, when the raw gas flows through the annular partition plate, the airflow channel is small, the flow speed of the raw gas is increased in a short time, so that the raw gas generates slight wind power, and is uniformly bubbled out of each through hole, the phenomenon that the raw gas cannot be bubbled in a short time, and after the raw gas is accumulated to a certain air pressure, a large amount of raw gas is sprayed out from a small part of bubbling, so that the reaction of part of raw gas is insufficient, the liquid-gas reaction efficiency is increased, and the liquid-gas reaction efficiency of the desulfurization tower is improved; part of the raw material gas is contacted with the annular partition plate in the rising process, the water vapor in the raw material gas is liquefied when meeting cold, and the raw material gas from which the water vapor is removed is reacted with lime slurry, so that the water vapor in the raw material gas is prevented from being dissolved into the lime slurry when the lime slurry is used for washing and desulfurizing the raw material gas, the lime slurry is diluted, incomplete desulfurization of the raw material gas is caused, and the reaction efficiency of the desulfurizing tower is further improved.
Preferably, cleaning rods are symmetrically arranged on the transmission shaft and positioned between the adjacent drainage plates; and the cleaning rod is fixedly connected with a hairbrush.
When the device is used, raw gas enters the desulfurizing tower to contact the inner wall of the desulfurizing tower, impurities in the raw gas are stained and adsorbed on the inner wall of the desulfurizing tower or the annular partition board, the temperature in the desulfurizing tower is higher in a long-time working state of the desulfurizing tower, lime slurry is scaled on the inner wall of the desulfurizing tower, and the annular partition board is provided with the cleaning rod and the brush, so that the driving shaft rotates to drive the cleaning rod to move; on the other hand, after the dirt and dust are brushed off by the hairbrush on the cleaning rod, incomplete reaction caused by insufficient contact of the raw material gas and lime slurry is avoided, and the reaction efficiency of the desulfurizing tower is increased.
Preferably, the section of the cleaning rod consists of a straight line a and a straight line b, the straight line a is close to the annular partition plate, the straight line b is close to the inner wall of the desulfurizing tower, and a hairbrush on the cleaning rod is in contact with the annular partition plate and the inner wall of the desulfurizing tower; the section of the hairbrush is semicircular.
When the desulfurization tower is used, the cross section of the hairbrush is semicircular, and when the hairbrush cleans some dirt with thicker or harder solidification degree, the semicircular hairbrush scratches the dirt with thicker or harder solidification degree, so that the cleaning degree in the desulfurization tower is further increased, and the cleaning degree of raw gas is further increased; the section of the cleaning rod consists of the straight line a and the straight line b, so that the volume of the cleaning rod is increased, the raw material gas in the desulfurizing tower is slightly stirred when the cleaning rod moves, the moving speed of the raw material gas is accelerated, the raw material gas speed is increased in a short time, the raw material gas generates slight wind force, the speed of the raw material gas when passing through the annular partition plate inner ring is further accelerated, the raw material gas is uniformly bubbled out from each through hole, the raw material gas is fully reacted, the liquid-gas reaction efficiency is improved, and the liquid-gas reaction efficiency of the desulfurizing tower is improved.
The beneficial effects of the invention are as follows:
1. According to the wet desulfurization system for the synthetic ammonia feed gas, through the cooperation among the drainage plate, the through holes and the scraping rods, the feed gas enters from the bottom of the desulfurization tower, rises through the lime slurry layer through the through holes and is bubbled out, the motor rotates to drive the transmission shaft to rotate, so that the scraping rods are driven to move, the scraping rods continuously and uniformly scrape lime slurry at the bottom of the drainage plate on the bottom of the drainage plate, the desulfurization quality of the desulfurization tower is improved, and the liquid-gas reaction efficiency of the desulfurization tower is improved.
2. According to the wet desulfurization system for the synthetic ammonia feed gas, the cross sections of the drainage plate and the scraping rod are semicircular, lime slurry is dropped on the drainage plate and flows along the arc-shaped outer surface of the drainage plate, a part of lime slurry passes through the through holes and is converged on the inner surface of the drainage plate, the scraping rod is uniformly scraped on the inner surface of the drainage plate, and the flowing distance of the lime slurry is increased, so that the coverage area of a lime slurry layer is increased, the liquid-gas reaction area is increased, and the reaction efficiency of a desulfurization tower is increased.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a partial enlarged view at B in FIG. 2;
FIG. 5 is a perspective view of a cleaning bar of the present invention;
In the figure: desulfurizing tower 1, circulating tower 2, air-cooler 3, motor 4, defogging unit 5, fall drencher 6, drainage board 61, through-hole 62, annular baffle 63, scrape pole 7, recess 71, roll brush 72, transmission shaft 8, cleaning rod 81, brush 82.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 5, the wet desulfurization system for the synthesis ammonia feed gas comprises a desulfurization tower 1, a circulating tower 2, an air cooler 3, a motor 4, a demisting unit 5 and a shower-reducing device 6; the circulating tower 2 is arranged on one side of the desulfurizing tower 1, a liquid conveying pipe in the circulating tower 2 is communicated with a liquid inlet pipe in the shower-reducing device 6, and the liquid inlet pipe in the circulating tower 2 is communicated with the bottom of the desulfurizing tower 1; the demisting unit 5 is arranged at the top position in the desulfurizing tower 1, a shower-lowering device 6 is arranged in the desulfurizing tower 1, and the shower-lowering device 6 is positioned below the demisting unit 5; the air cooler 3 is arranged on one side of the desulfurizing tower 1 adjacent to the circulating tower 2; the motor 4 is arranged at the bottom of the desulfurizing tower 1; the center of the bottom of the desulfurizing tower 1 is rotationally connected with a transmission shaft 8, one end of the transmission shaft 8 is positioned in the desulfurizing tower 1, the other end of the transmission shaft 8 penetrates through the bottom of the desulfurizing tower 1 and is positioned outside the desulfurizing tower 1, and the transmission shaft 8 is fixedly connected with an output shaft in the motor 4; a group of drainage plates 61 are uniformly and fixedly connected in the desulfurizing tower 1, and each drainage plate 61 is positioned below the shower-lowering device 6; one end of the transmission shaft 8 positioned in the desulfurizing tower 1 is rotationally connected with a drainage plate 61 close to the shower lowering device 6; a group of through holes 62 are uniformly formed in the drainage plate 61; the scraping rods 7 are symmetrically arranged at the positions, located at the bottoms of the drainage plates 61, of the transmission shafts 8, each scraping rod 7 is in contact with the bottoms of the drainage plates 61, and the transmission shafts 8 drive the scraping rods 7 to slightly scratch the bottoms of the drainage plates 61.
When the device is used, the motor 4, the circulating tower 2 and the desulfurizing tower 1 are started, the circulating tower 2 conveys lime slurry to the shower-reducing device 6 through a pipeline, the lime slurry passes through the shower-reducing device 6, the gas flow Nm 3/h=the liquid-gas ratio L/m 3 is adopted for shower-reducing according to the specified liquid-gas ratio, namely the flow m 3/h of the lime slurry, the raw gas is conveyed into the desulfurizing tower 1 through the gas inlet part of the desulfurizing tower 1, the gas temperature before the raw gas enters the desulfurizing tower 1 is higher than 120 ℃, the raw gas starts to rise to contact and wash the lime slurry discharged by the shower-reducing device 6 after entering the desulfurizing tower 1, chemical reaction, namely SO 2+H2O→H2SO3 absorption and CaCO 3+H2SO3→CaSO3+CO2+H2 O neutralization are generated; in the existing sieve plate tower technology, liquid enters from the top of the desulfurizing tower 1, descends from plate to plate through an overflow pipe, and stores a lime slurry layer at the bottom of the plate, desulfurization is an endothermic reaction, the desulfurizing tower 1 is heated during operation, under long-time operation, a part of lime slurry solidification reaction which does not flow down on a tower plate forms scale on the plate, the desulfurizing area is reduced, the desulfurizing efficiency is reduced, and even the weight of the tower plate is increased to damage the tower plate and the desulfurizing tower 1; through the cooperation between the drainage plate 61, the through holes 62 and the scraping rod 7, lime slurry continuously gathers to the bottom of the drainage plate 61, lime slurry liquid layers are formed by gathering at the bottom of the drainage plate 61, raw material gas enters from the bottom of the desulfurizing tower 1, rises through the lime slurry liquid layers through the through holes 62 and bubbles out, the motor 4 rotates to drive the transmission shaft 8 to rotate, so that the scraping rod 7 drives the scraping rod 7 to move, the lime slurry at the bottom of the drainage plate 61 is continuously and uniformly scraped at the bottom of the drainage plate 61, a part of lime slurry at the bottom of the drainage plate 61 is prevented from being reduced or even consumed, the desulfurizing quality of the desulfurizing tower 1 is improved, and the liquid-gas reaction efficiency of the desulfurizing tower 1 is improved; due to the arrangement of the scraping rod 7, in a long-time working state, the lime slurry layer at the bottom of the drainage plate 61 is scaled, the scraping rod 7 is in contact with the drainage plate 61 and moves along with the transmission shaft 8 to scrape lime scale, so that the reduction of the desulfurization area caused by scaling is avoided, the desulfurization efficiency is reduced, and even the weight of the drainage plate 61 is increased to damage the drainage plate 61 and the desulfurization tower 1; sulfur dioxide in the raw material gas and a lime slurry layer are catalytically reacted to form calcium sulfate floccules, the floccules generated after the lime slurry reaction flow to or drip to the bottom of the desulfurizing tower 1 under the influence of gravity, flow into the circulating tower 2 along a pipeline, are conveyed to the shower-reducing device 6 again after being treated by the circulating tower 2, are desulfurized, and the recycling of the lime slurry is increased; the reacted raw material gas passes through the through holes 62 and continuously rises until entering the demisting unit 5, and the demisting unit 5 is treated and then discharged through the exhaust part of the desulfurizing tower 1.
As an embodiment of the present invention, the cross sections of the drainage plate 61 and the scraping rod 7 are both semicircular arc shapes, the scraping rod 7 is made of rubber, and the drainage plate 61 is cover-shaped; the aperture of the through hole 62 at the top end of the drainage plate 61 is larger than the aperture at the bottom end of the drainage plate 61.
When the lime slurry flow guiding device is used, the sections of the guiding plate 61 and the scraping rod 7 are semicircular, lime slurry is dropped on the guiding plate 61 and flows along the arc-shaped outer surface of the guiding plate 61, when the lime slurry flows, one through hole 62 is formed in each path, a part of lime slurry passes through the through hole 62 and is converged on the inner surface of the guiding plate 61, the scraping rod 7 is uniformly scraped on the inner surface of the guiding plate 61, the flowing distance of the lime slurry is increased, the covering area of a lime slurry layer is increased, the liquid-gas reaction area is increased, the reaction efficiency of the desulfurizing tower 1 is increased, the lime slurry is prevented from dropping on the flat guiding plate 61 and directly flowing down through the through hole 62, the contact between the lime slurry and raw material gas is insufficient, and the reaction effect is reduced; through setting up the different aperture in through-hole 62 both ends, the through-hole 62 is located the aperture on drainage plate 61 top, be greater than the aperture that is located drainage plate 61 bottom, the flow that lime thick liquid flowed into through-hole 62 top is greater than the flow that flows out of through-hole 62 bottom, make and store the fractional lime thick liquid in the through-hole 62, supply each through-hole 62 bottom to flow out, assemble into lime thick liquid layer, ensure that the lime thick liquid flows out of every through-hole 62 bottom, further increase the coverage area of lime thick liquid layer, increase the liquid gas reaction area, increase the reaction efficiency of desulfurizing tower 1, prevent that lime thick liquid flows coverage area is inhomogeneous, the volume that a part of lime thick liquid flows to through-hole 62 is less, make through-hole 62 bottom can not long-time outflow lime thick liquid, form the lime thick liquid layer.
As an implementation mode of the invention, a group of grooves 71 are uniformly formed on one scraper 7 of the adjacent scraper 7, and a rolling brush 72 is rotatably connected in each groove 71 through a rotating shaft; the rolling brushes 72 are attached to the bottom ends of the drainage plates 61.
When the desulfurizing tower is used, the rolling brush 72 is arranged, the lime slurry layer reacts with the raw gas, the lime slurry reacts into calcium sulfate floccules and drops to the bottom of the desulfurizing tower 1, the transmission shaft 8 rotates to drive the scraping rod 7 to move, the scraping rod 7 drives the rolling brush 72 to move, the rolling brush 72 is attached to the bottom end of the drainage plate 61, the rolling brush 72 is rubbed and rolled by the bottom end of the drainage plate 61, the bottom end of the drainage plate 61 is uniformly and repeatedly smeared, the possibility that no lime slurry exists at the bottom of the drainage plate 61 is prevented, the coverage area of the lime slurry layer is increased, the liquid-gas reaction area is increased, and the reaction efficiency of the desulfurizing tower 1 is increased; owing to be provided with the rolling brush 72, the rolling brush 72 rolls and glues and attach the brush away, and the dust debris that glues at the lime slurry liquid layer after calcium sulfate floccule and raw materials gas wash prevents that the raw materials gas from contacting when flowing, causes secondary pollution, leads to the reaction inhomogeneous, increases the cleanliness of lime slurry liquid layer to increase the cleanliness of raw materials gas.
As an implementation mode of the invention, a group of annular partition plates 63 are uniformly and fixedly connected to the inner wall of the desulfurizing tower 1, and the annular partition plates 63 incline downwards; the top end of the annular partition plate 63 is fixedly connected with the bottom end of the drainage plate 61, and through holes 62 are formed in the contact positions of the drainage plate 61 and the annular partition plate 63, so that downward flow of lime slurry passing through the through holes 62 on the annular partition plate 63 is realized; one end of the annular partition plate 63, which is far away from the inner wall of the desulfurizing tower 1, is positioned below the inside of the drainage plate 61; the inside of the annular partition 63 is hollow, and the inside of the annular partition 63 is communicated with the air cooler 3 through a pipeline.
When the desulfurization tower is used, raw gas enters the desulfurization tower 1 and rises upwards, the raw gas flows to the drainage plate 61 through the inner ring of the annular partition plate 63 due to the annular partition plate 63, the diameter of the inner ring of the annular partition plate 63 is smaller than that of the outer ring of the drainage plate 61, when the raw gas flows through the annular partition plate 63, the airflow channel is small, the flow speed of the raw gas is increased in a short time, so that the raw gas generates slight wind power, and is uniformly bubbled out of each through hole 62, the phenomenon that the raw gas is insufficient in wind power, can not be bubbled in a short time, and is greatly sprayed out from a small part of bubbling after accumulating to a certain air pressure, so that a part of raw gas is insufficient in reaction, the liquid-gas reaction efficiency is increased, and the liquid-gas reaction efficiency of the desulfurization tower 1 is improved; part of the raw gas is contacted with the annular partition plate 63 in the rising process, the water vapor in the raw gas is liquefied when being cooled, the raw gas with the water vapor removed is reacted with lime slurry, and the water vapor in the raw gas is prevented from being dissolved into the lime slurry when the lime slurry is used for washing and desulfurizing the raw gas, so that the lime slurry is diluted, incomplete desulfurization of the raw gas is caused, and the reaction efficiency of the desulfurizing tower 1 is further improved.
As one embodiment of the present invention, the cleaning rods 81 are symmetrically installed on the driving shaft 8 at positions between the adjacent drainage plates 61; a brush 82 is fixedly connected to the cleaning rod 81.
When the device is used, raw gas enters the desulfurizing tower 1 and contacts the inner wall of the desulfurizing tower 1, impurities in the raw gas are stained and adsorbed on the inner wall of the desulfurizing tower 1 or the annular partition 63, the temperature in the desulfurizing tower 1 is higher, lime slurry is scaled on the inner wall of the desulfurizing tower 1 and the annular partition 63 under the long-time working state of the desulfurizing tower 1, and the cleaning rod 81 is driven to move due to the fact that the cleaning rod 81 and the brush 82 are arranged, and on one hand, the brush 82 on the cleaning rod 81 brushes dirt and dust on the inner wall of the desulfurizing tower 1 or the annular partition 63, so that the cleaning degree of the raw gas is increased; on the other hand, after the brush 82 on the cleaning lever 81 brushes off the dirt and dust, incomplete reaction of the raw material gas due to insufficient contact of the dirt with the lime slurry is avoided, and the reaction efficiency of the desulfurizing tower 1 is increased.
As one embodiment of the invention, the section of the cleaning rod 81 is composed of a straight line a and a straight line b, the straight line a is close to the annular partition 63, the straight line b is close to the inner wall of the desulfurizing tower 1, and the brush 82 on the cleaning rod 81 contacts the annular partition 63 and the inner wall of the desulfurizing tower 1; the cross section of the hairbrush 82 is semicircular.
When the desulfurization tower is used, the cross section of the hairbrush 82 is semicircular, and when the hairbrush 82 cleans some dirt with thicker or harder solidification degree, the semicircular hairbrush 82 scrapes the dirt with thicker or harder solidification degree, so that the cleaning degree in the desulfurization tower 1 is further increased, and the cleaning degree of raw gas is further increased; since the cleaning rod 81 is composed of the straight line a and the straight line b in the section of the cleaning rod 81, the volume of the cleaning rod 81 is increased, the raw material gas in the desulfurizing tower 1 is slightly stirred when the cleaning rod 81 moves, the moving speed of the raw material gas is accelerated, the raw material gas speed is increased in a short time, the raw material gas generates slight wind force, the speed of the raw material gas when passing through the inner ring of the annular partition plate 63 is further accelerated, the raw material gas is uniformly bubbled out from each through hole 62, the raw material gas is fully reacted, the liquid-gas reaction efficiency is increased, and the liquid-gas reaction efficiency of the desulfurizing tower 1 is improved.
The specific working procedure is as follows:
Starting a motor 4, a circulating tower 2 and a desulfurizing tower 1, wherein the circulating tower 2 conveys lime slurry to a shower-lowering device 6 through a pipeline, the lime slurry is shower-lowered through the shower-lowering device 6 according to a specified liquid-gas ratio, and raw gas is conveyed into the desulfurizing tower 1 through an air inlet part of the desulfurizing tower 1; continuously converging lime slurry to the bottom of the drainage plate 61, converging the lime slurry at the bottom of the drainage plate 61 to form a lime slurry layer, allowing raw gas to enter from the bottom of the desulfurization tower 1, rising through the lime slurry layer through a through hole 62, bubbling, and driving a transmission shaft 8 to rotate by rotation of a motor 4 so as to drive a scraping rod 7 to move, and continuously and uniformly scraping the lime slurry at the bottom of the drainage plate 61 on the bottom of the drainage plate 61 by the scraping rod 7; in a long-time working state, the lime slurry layer at the bottom of the drainage plate 61 is scaled, and the scraping rod 7 is contacted with the drainage plate 61 and moves along with the transmission shaft 8 to scrape lime scale; lime slurry drops onto the drainage plate 61, flows along the arc-shaped outer surface of the drainage plate 61, a part of lime slurry passes through the through holes 62 and is converged on the inner surface of the drainage plate 61, the scraping rod 7 is uniformly scraped on the inner surface of the drainage plate 61, and the flow distance of lime slurry is increased; the flow rate of the lime slurry flowing into the top end of the through hole 62 is larger than the flow rate of the lime slurry flowing out of the bottom end of the through hole 62, so that a small part of lime slurry is stored in the through hole 62 and is supplied to the bottom end of each through hole 62 to flow out and be converged into a lime slurry layer, the lime slurry flowing out of the bottom end of each through hole 62 is ensured, and the coverage area of the lime slurry layer is further increased; the scraping rod 7 drives the rolling brush 72 to move, the rolling brush 72 is attached to the bottom end of the drainage plate 61, the rolling brush 72 is rubbed and rolled by the bottom end of the drainage plate 61, and the bottom end of the drainage plate 61 is uniformly and repeatedly smeared; the rolling brush 72 rolls and brushes away dust and sundries adhered to the lime slurry layer after the calcium sulfate floccules and the raw material gas are washed; the raw gas flows to the drainage plate 61 through the inner ring of the annular partition plate 63, the diameter of the inner ring of the annular partition plate 63 is smaller than that of the outer ring of the drainage plate 61, when the raw gas flows through the annular partition plate 63, the airflow channel is reduced, the flow speed of the raw gas is increased in a short time, so that the raw gas generates slight wind force and uniformly bubbles out from each through hole 62; part of the raw material gas contacts the annular partition plate 63 in the rising process, water vapor in the raw material gas is liquefied when being cooled, and the raw material gas with the water vapor removed is reacted with lime slurry; the raw material gas enters the desulfurizing tower 1 and contacts the inner wall of the desulfurizing tower 1, impurities in the raw material gas are stained and adsorbed on the inner wall of the desulfurizing tower 1 or the annular partition 63, the temperature in the desulfurizing tower 1 is higher in a long-time working state of the desulfurizing tower 1, lime slurry is scaled on the inner wall of the desulfurizing tower 1 and the annular partition 63, and on one hand, the brush 82 on the cleaning rod 81 brushes dirt and dust on the inner wall of the desulfurizing tower 1 or the annular partition 63; on the other hand, after the brush 82 on the cleaning lever 81 brushes off dirt and dust, the reaction efficiency of the desulfurizing tower 1 is increased; when the brush 82 cleans some dirt with thicker or harder solidification degree, the semicircular brush 82 scrapes the dirt with thicker or harder solidification degree; when the cleaning rod 81 moves, the raw material gas in the desulfurizing tower 1 is slightly stirred, the movement speed of the raw material gas is accelerated, the raw material gas flow speed is increased for a short time, so that the raw material gas generates slight wind force, and the speed of the raw material gas when passing through the inner ring of the annular partition 63 is further accelerated; sulfur dioxide in the raw material gas and a lime slurry layer are catalytically reacted to form calcium sulfate floccules, the floccules generated after the lime slurry reaction flow to or drip to the bottom of the desulfurizing tower 1 under the influence of gravity, flow into the circulating tower 2 along a pipeline, are conveyed to the shower-reducing device 6 again after being treated by the circulating tower 2, are desulfurized, and the recycling of the lime slurry is increased; the reacted raw material gas passes through the through holes 62 and continuously rises until entering the demisting unit 5, and the demisting unit 5 is treated and then discharged through the exhaust part of the desulfurizing tower 1.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A synthetic ammonia feed gas wet desulfurization system is characterized in that: comprises a desulfurizing tower (1), a circulating tower (2), an air cooler (3), a motor (4), a demisting unit (5) and a shower-reducing device (6); the circulating tower (2) is arranged at one side of the desulfurizing tower (1), a liquid conveying pipe in the circulating tower (2) is communicated with a liquid inlet pipe in the shower-reducing device (6), and the liquid inlet pipe in the circulating tower (2) is communicated with the bottom of the desulfurizing tower (1); the demisting unit (5) is arranged at the inner top part of the desulfurizing tower (1), a shower-lowering device (6) is arranged in the desulfurizing tower (1), and the shower-lowering device (6) is positioned below the demisting unit (5); the air cooler (3) is arranged at one side of the desulfurizing tower (1) adjacent to the circulating tower (2); the motor (4) is arranged at the bottom of the desulfurizing tower (1); the center of the bottom of the desulfurizing tower (1) is rotationally connected with a transmission shaft (8), one end of the transmission shaft (8) is positioned in the desulfurizing tower (1), the other end of the transmission shaft (8) passes through the bottom of the desulfurizing tower (1) and is positioned outside the desulfurizing tower (1), and the transmission shaft (8) is fixedly connected with an output shaft in the motor (4); a group of drainage plates (61) are uniformly and fixedly connected in the desulfurizing tower (1), and each drainage plate (61) is positioned below the shower-lowering device (6); one end of the transmission shaft (8) positioned in the desulfurizing tower (1) is rotationally connected with a drainage plate (61) close to the shower lowering device (6); a group of through holes (62) are uniformly formed in the drainage plate (61); scraping rods (7) are symmetrically arranged on the transmission shaft (8) and positioned at the bottom of the drainage plate (61), and each scraping rod (7) is contacted with the bottom of the drainage plate (61), so that the transmission shaft (8) drives the scraping rods (7) to slightly scratch the bottom of the drainage plate (61);
the sections of the drainage plate (61) and the scraping rod (7) are semicircular, the scraping rod (7) is made of rubber, and the drainage plate (61) is in a cover shape; the aperture of the through hole (62) positioned at the top end of the drainage plate (61) is larger than the aperture positioned at the bottom end of the drainage plate (61);
A group of grooves (71) are uniformly formed in one scraper rod (7) of the adjacent scraper rods (7), and a rolling brush (72) is rotatably connected in each groove (71) through a rotating shaft; the rolling brushes (72) are attached to the bottom ends of the drainage plates (61);
A group of annular partition plates (63) are uniformly and fixedly connected to the inner wall of the desulfurizing tower (1), and the annular partition plates (63) incline downwards; the top end of the annular partition plate (63) is fixedly connected with the bottom end of the drainage plate (61), and through holes (62) are formed in the contact positions of the drainage plate (61) and the annular partition plate (63), so that lime slurry on the annular partition plate (63) flows downwards through the through holes (62); one end of the annular partition plate (63) far away from the inner wall of the desulfurizing tower (1) is positioned at the position below the inner part of the drainage plate (61); the inside of the annular partition plate (63) is hollow, and the inside of the annular partition plate (63) is communicated with the air cooler (3) through a pipeline;
Cleaning rods (81) are symmetrically arranged on the transmission shaft (8) and positioned between the adjacent drainage plates (61); a brush (82) is fixedly connected to the cleaning rod (81);
The section of the cleaning rod (81) consists of a straight line a, a straight line b and a straight line c, wherein the straight line a is close to the annular partition plate (63), the straight line b is close to the inner wall of the desulfurizing tower (1), the straight line c is close to the outer surface of the top end of the drainage plate (61), and the brushes (82) on the cleaning rod (81) are in contact with the annular partition plate (63), the inner wall of the desulfurizing tower (1) and the outer surface of the top end of the drainage plate (61); the sections of the brushes (82) are all semicircular;
The motor (4) rotates to drive the transmission shaft (8) to rotate, so that the scraping rod (7) is driven to move, and the scraping rod (7) continuously and uniformly scrapes lime slurry at the bottom of the drainage plate (61) on the bottom of the drainage plate (61); in a long-time working state, the lime slurry layer at the bottom of the drainage plate (61) is scaled, and the scraping rod (7) is contacted with the drainage plate (61) and moves along with the transmission shaft (8) to scrape lime scale; lime slurry is dropped onto the drainage plate (61), flows along the arc-shaped outer surface of the drainage plate (61), a part of lime slurry passes through the through holes (62) to be converged on the inner surface of the drainage plate (61), and the scraping rod (7) is uniformly scraped on the inner surface of the drainage plate (61), so that the flow distance of lime slurry is increased; the flow rate of lime slurry flowing into the top end of the through hole (62) is larger than the flow rate of lime slurry flowing out of the bottom end of the through hole (62), so that a small part of lime slurry is stored in the through hole (62), flows out of the bottom end of each through hole (62) and is converged into a lime slurry layer, the bottom end of each through hole (62) is ensured to flow out of the lime slurry layer, and the coverage area of the lime slurry layer is further increased; the scraping rod (7) drives the rolling brush (72) to move, the rolling brush (72) is attached to the bottom end of the drainage plate (61), the rolling brush (72) is rubbed and rolled by the bottom end of the drainage plate (61), and the bottom end of the drainage plate (61) is uniformly and repeatedly smeared; the rolling brush (72) rolls and adheres to brush away, and the calcium sulfate floccules and the raw material gas are washed and then adhere to dust and sundries in the lime slurry layer; the raw gas flows to the drainage plate (61) through the inner ring of the annular partition plate (63), the diameter of the inner ring of the annular partition plate (63) is smaller than that of the outer ring of the drainage plate (61), when the raw gas flows through the annular partition plate (63), the airflow channel is reduced, the flow speed of the raw gas is increased in a short time, so that the raw gas generates slight wind force, and bubbles out from each through hole (62) uniformly; part of the raw material gas is contacted with the annular partition plate (63) in the rising process, the water vapor in the raw material gas is liquefied when being cooled, and the raw material gas from which the water vapor is removed is reacted with lime slurry; the raw material gas enters the desulfurizing tower (1) and contacts the inner wall of the desulfurizing tower (1), impurities in the raw material gas are stained and adsorbed on the inner wall of the desulfurizing tower (1) or the annular partition board (63), the temperature in the desulfurizing tower (1) is higher in a long-time working state of the desulfurizing tower (1), lime slurry is scaled on the inner wall of the desulfurizing tower (1) and the annular partition board (63), and on one hand, a brush (82) on a cleaning rod (81) brushes dirt and dust on the inner wall of the desulfurizing tower (1) or the annular partition board (63); on the other hand, after the brush (82) on the cleaning rod (81) brushes off dirt and dust, the reaction efficiency of the desulfurizing tower (1) is increased; when the brush (82) cleans some dirt with thicker or harder solidification degree, the semicircular brush (82) scrapes the dirt with thicker or harder solidification degree; when the cleaning rod (81) moves, the raw gas in the desulfurizing tower (1) is slightly stirred, so that the movement speed of the raw gas is accelerated, the raw gas flow speed is increased in a short time, the raw gas generates slight wind force, and the speed of the raw gas when passing through the inner ring of the annular partition plate (63) is further accelerated.
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| CN212467629U (en) * | 2020-06-01 | 2021-02-05 | 溧阳市鑫盛化工设备有限公司 | Dry absorption tower |
| CN212669264U (en) * | 2020-06-24 | 2021-03-09 | 湖北亿科环保有限公司 | Anti-blocking sieve plate stripping tower |
| CN212680630U (en) * | 2020-07-07 | 2021-03-12 | 江苏东欣环保科技有限公司 | Novel desulfurizing tower |
| CN112337234A (en) * | 2020-10-06 | 2021-02-09 | 华中科技大学 | Whirl cutting formula tray structure and desulfurizing tower of desorption heavy metal pollutant |
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