CN101081348A - Novel barrier type air-actuated three-phase fluidization synthetized absorbing tower - Google Patents
Novel barrier type air-actuated three-phase fluidization synthetized absorbing tower Download PDFInfo
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- CN101081348A CN101081348A CN 200610083495 CN200610083495A CN101081348A CN 101081348 A CN101081348 A CN 101081348A CN 200610083495 CN200610083495 CN 200610083495 CN 200610083495 A CN200610083495 A CN 200610083495A CN 101081348 A CN101081348 A CN 101081348A
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Abstract
The grating type pneumatic triphase fluidizing comprehensive absorption tower includes one housing, one gas inlet channel and gas outlet channel in the top of the tower, one rotary defogging and dewatering unit, one stuffing assembly comprising support boards, hold-down boards and stuffing, one coaxial tubular grating member, one liquid distributor with ring sprinkler pipe, one large caliber reverse sprayer inside the gas inlet channel, and one absorbing slurry pond in the bottom of the tower. It features the special grating structure, the regularly arranged stuffing for cyclic fluidizing, the combined foam absorption and stuffing absorption, etc, and has high absorption efficiency, great gas treating amount and other advantages.
Description
Technical field
The invention belongs to the innovation of GAS ABSORPTION cleaning equipment, relate in particular to a kind of novel barrier type air-actuated three-phase fluidization synthetized absorbing tower.Be applicable to the purification of waste gas in the fields such as large-scale coal-burning boiler, metallurgy, chemical industry.
Background technology
At present, in chemical industry and environmental improvement industry, have the gas of various forms and absorption mechanism to separate, the gas-liquid mass transfer (contact) equipment of absorption cleaning.Such as, spray absorber, packed tower, fluid column absorption tower, plate column, fluid bed and Venturi scrubber, moisture film washer etc., they are in the advantage of bringing into play aspect the chemical industry in modern times and the air environmental pollution improvement separately.
In China, the boiler emission sulfur in smoke of control atmosphere pollution, especially coal-burning power plant and the improvement of dust are particularly urgent and important.But, because China administers time weak point, the task of sulfur dioxide in the coal-fired flue-gas and weighs, lacks experience, again because flue gas desulfurization device costs an arm and a leg, the operating cost height, cause China in a short time to rely on foreign technology, the construction cost height, the operating cost height, technology digest and assimilate the cost height, problems such as operational effect difference occur in a large number.
In various absorption towers, packed tower is a kind of widely used gas-liquid mass transfer (contact) equipment, is playing the part of very important role in the distillation in chemical industry, extraction, the absorption operation.Compare with plate column, it have simple in structure, pressure drop is low, filler can be with resistant material manufacturing, gas-liquid mass transfer efficient height, characteristics such as liquid holdup is little, operation is mature and stable.But compare with hollow-spraying-tower tower, fluid column absorption tower, fluid bed absorption tower (a kind of special packed tower) etc., thereby also have the gas treatment amount of single tower little, the gas-operated scope is little, material responsive especially to the variation of liquid load, that be not suitable for containing solid suspension is handled, result in blockage easily, gas-liquid is along with very inhomogeneous serious " enlarge-effect " or the like the shortcoming that causes of increasing distribution of tower.
Make solution enlarge-effect that way that filler moves can be to a certain degree and the fouling of filler space, blocking problem, such as patent No. CN00112918.X, utilize the rotation of central shaft to drive blade movement fixed thereon exactly, blade stirs filler, makes the distribution of gas-liquid in the filler and mixes more even.Thereby reach the processing of higher absorption efficiency, bigger gas flow and avoid fouling, obstruction largely.But the use of turning cylinder must increase the operation power consumption of equipment, the fault rate of increase equipment operation.
The filler of three phase fluidized bed packed absorber whole bed when operation is in the fluidisation attitude, can avoid piston flow and vent plug phenomenon effectively, and the self-cleaning effect of filler fluidisation can avoid contact zone precipitation fouling to stop up.The invention or utility model patent that a lot of this respects are arranged both at home and abroad.But along with the increase that absorbs tower diameter, channel, wall stream, short circuit, dead band etc. are still inevitable, have caused the inhomogeneous of gas-liquid distribution, and remarkable deviation has taken place for local liquid-gas ratio and overall liquid-gas ratio, gas-liquid mass transfer efficient obviously descends, promptly so-called " enlarge-effect ".Simultaneously, the height of packing layer is very high, generally at several meters-tens meters, need be divided into multilayer, also needs to increase the collection and the apparatus for redistributing of liquid between each packing layer, causes structure complicated, is not easy to installation and maintenance.In addition, in order to guarantee absorption and separation efficient, too high packing layer also causes the difficulty of device fabrication, the increase of cost and the increasing of SR, thereby causes investing the increase with operating cost.
Summary of the invention
The present invention is directed to the above-mentioned defective that exists in the prior art, a kind of novel barrier type air-actuated three-phase fluidization synthetized absorbing tower is provided.Regular ciculation fluidized, the contrary spray district foam of the special barrier structure of this device, filler absorbs and Promethean characteristics such as the filler absorption combines, can realize the even distribution of gas-liquid in the major diameter inner-tower filling material, avoid the fouling and the obstruction of packing area, improve absorption efficiency, greatly reduce the height of packing layer.Purpose be to provide a kind of simple in structure, mass-transfer efficiency is high, small investment, operation and maintenance cost are economized, the gas treatment amount is big, the big comprehensive absorption plant of load accommodation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, comprise the absorption tower body case, the air inlet of cat head, outlet passageway, the rotary demist dewater unit of tower internal upper part, filler gripper shoe, hold-down grid and filler in the tower, the concentric tube type barrier member between the filler, the circular spray tube liquid distributor on the hold-down grid, the contrary spray apparatus of heavy caliber in the inlet channel, the absorption slurries pond of tower inner bottom part.
Described rotary demist dewater unit is the annulus spacer assembly, between per two adjacent annulus the demist flow deflector is set and two ends are fixed on the annulus.The quantity of annulus is by the diameter decision of tower.Whole device is installed on the truss of tower internal upper part.
Bottom, described absorption tower is provided with absorption liquid slurries outlet, loop slurry outlet.
Described airflow inlet is positioned at center, top, absorption tower and extends downwardly into filler gripper shoe place.
Described air stream outlet is positioned at the top-side on absorption tower.
Gas flow rate is 2 ~ 5 meter per seconds in the described absorption tower.
Gas passage on described filler gripper shoe, the hold-down grid is an annular opening, and welding gas flow deflector on the filler gripper shoe opening tangentially rotatablely moves gas.
Described barrier member is made up of anisodiametric concentric circles woven wire tubulose staving more than 2.Welding strengthens the support metal bar on the staving silk screen, and together is fixed between filler gripper shoe and the hold-down grid.
Described filler is spherical, is solid sphere, can adopt stainless steel or plastic material.Bed stuffing height is between 300-500mm.
Described shower liquid distributor is a concentric circles annular tubular structure, is erected at 200mm-400mm place between per two barriers, on the hold-down grid.The below of liquid distributor uniformly-spaced adds the uncovered nozzle of heavy caliber.
The contrary spray apparatus of heavy caliber in the described inlet channel is the below that is positioned at the middle inlet channel pipe of tower body, is made up of shower and the uncovered nozzle of some heavy calibers, and spray caliber and nozzle quantity are determined according to the size and the channel diameter of gas treatment amount.
Gas flow rate in the described inlet channel is 10-15m/s, and the absorption liquid with contrary spray below passage bumps against, and forms the foam uptake zone.
The invention has the beneficial effects as follows, utilize the power of high-speed gas, bump against with absorption liquid in admission line, the impulse force of gas scatters absorption liquid to splash, and absorption liquid and gas reach dynamic balancing place and forms stable froth bed.This froth bed is the strong turbulence zone, fully mixes in this regional gas-liquid, and the turbulence film of absorption liquid has wrapped up dust and the gaseous contaminant in the gas, reaches to purify the purpose that absorbs.Owing to adopt the uncovered shower nozzle of heavy caliber, there is not the fine drop that produces because of atomizing in the gas, be difficult for causing the obstruction of spray system simultaneously.
Utilize the gas flow guiding sheet that welds on the filler gripper shoe opening, gas is tangentially rotatablely moved, rather than, promote the regular fluidisation motion of filler by external mechanical force, when realizing packed tower high mass transfer efficiency, low liquid-gas ratio, the fixedly interior fouling of packed bed, blocking problem have been solved.Simultaneously, by the barrier member is set in filler, be equivalent in the parallel connection of a plurality of small-sized packed absorbers and handle, farthest reduce phenomenons such as channel, wall stream, short circuit, dead band, realize the even distribution of gas-liquid, fundamentally solved " enlarge-effect " of absorption plant.
The foam absorption of contrary spray district absorbs the bed stuffing height that makes that combines with the packing area and reduces greatly, need not the multilayer filler, has simplified the structure of packing area.The liquid-gas ratio of having realized whole packed tower is low, resistance is low and housing structure is short, bring reducing significantly and the minimizing significantly of floor space of whole gas purification corollary system equipment configuration parameter, thus bring that investment cost reduces, operation and maintenance cost reduces, operation is large-minded, opereating specification wide, be fit to various character absorption liquid, have the advantages such as transformation of the limited old coal-burning boiler of self-cleaning function, very suitable cleaning equipment place.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a filler gripper shoe schematic diagram.
Fig. 3 is the hold-down grid schematic diagram.
Fig. 4 is the liquid distributor schematic diagram.
Fig. 5 is a barrier member schematic diagram.
1. tower body shells among the figure, 2. admission line, 3. gas vent, 4. absorption liquid outlet, 5. absorption liquid circulation pipe, 6. shower liquid distributor, 7. contrary spray apparatus, 8. filler gripper shoe, 9. hold-down grid, 10. tubular type barrier member, 11. fillers, 12. demist dewater units, 13. the support backstay, 14. flow deflectors, 15. froth beds, 16. the annular opening, 17. entity pallets, 18. nozzles, 19. the spray main, 20. annulars spray arm, 21. absorb the slurries pond.
The specific embodiment
In Fig. 1, the present invention includes absorption tower body case (1), the admission line of cat head (2), gas vent (3), the rotary demist dewater unit (12) of tower internal upper part, concentric tube type barrier member (10) in the middle of filler gripper shoe (8), hold-down grid (9) and the filler (11) in the tower, filler, the circular spray tube liquid distributor (6) on the hold-down grid (9), the contrary spray apparatus (7) of heavy caliber in the admission line, the absorption slurries pond (21) of tower inner bottom part.The raw-gas that contains pollutant enters in the absorption tower from top admission line (2), bottom in admission line (2), the absorption liquid of contrary spray apparatus (7) ejection of raw-gas and slurries bumps against, the impulse force of gas scatters absorption liquid to splash, and absorption liquid and gas reach dynamic balancing place and forms stable froth bed (15).This froth bed is the strong turbulence zone, fully mixes in this regional gas-liquid, and the turbulence film of absorption liquid has wrapped up dust and the gaseous contaminant in the gas, reaches to purify the purpose that absorbs.Owing to adopt the uncovered shower nozzle of heavy caliber, there is not the fine drop that produces because of atomizing in the gas, be difficult for causing the obstruction of spray system simultaneously.Gas is transferred after by the froth bed in the admission line upwards, and behind the flow deflector (14) on the filler gripper shoe (8), gas tangentially enters filler (11) layer.In packing layer, the absorption liquid that gets off above forms liquid film at filling surface, and gas-liquid is carried out the mass transfer absorption process at this.Therefore the level angle of flow deflector produces the motive force of gas between the 30-45 degree, promote filling ball (11) when doing the concentric circumferences motion, and filling ball is also made spinning motion.This makes liquid film on the filling ball can cover comprehensively, upgrade very fast, and gas also is dispersed in the filler space, and gas phase, liquid phase are all disperseed, the gas-liquid full contact, thereby promoted the mass transport process of gas-liquid.Simultaneously, the regular motion of filling ball also makes and can realize self-cleaning in the packing layer, is difficult for forming the fouling clogging.Cleaned gas continues upwards, after demist dewater unit (12) removes most of droplet, drop, discharges the absorption tower through gas vent (3).The tower body size in the absorption slurries pond (21) of below will wait to determine according to the character of the size of handling gas flow, the concentration of pollutant, used absorbent, the processing requirements that absorbs the back accessory substance.Absorption liquid outlet (4) is established in the bottom in slurries pond, and top is established the loop slurry outlet and is connected with absorption liquid circulation pipe (5).
Fig. 2 and embodiment illustrated in fig. 3 in, the effect of filler gripper shoe (8) is to hold filler (11), the effect of hold-down grid (9) is to prevent that filler (11) spheroid is blown away when gas flow rate is excessive, and filler gripper shoe (8) and hold-down grid (9) have the effect that the gas passage is provided simultaneously.Entity pallet (17) is fixed on and supports on the backstay (13), forms annular opening (16) between each annular entity pallet, in the time of gas passage that its purpose is to provide bigger, reduces the resistance between plate and the filling ball, is convenient to the motion of filling ball.The effect of the flow deflector (14) of filler gripper shoe opening part welding is to make the gas and changing direction of passing through, and produces to promote the motive force that filling ball carries out the ciculation fluidized and rotation of rule.The level angle of flow deflector (14) is between the 30-45 degree.
In the embodiment shown in fig. 4, the annular tubular structure of shower liquid distributor (6) is according to the design of the characteristics of tubular type barrier member (10), one or two annular spray arm (20) is arranged in filler top between per two barrier members (10), and each sprays arm and links to each other with spray main (19).Because the motion of filling ball under the uneven situation of nozzle (18) cloth liquid, also can realize the even reallocation of absorption liquid in packing layer, therefore make the liquid distributor design simplification.Therefore simultaneously, also do not need absorption liquid is atomized, can select the uncovered nozzle of heavy caliber (18) for use, the obstruction that this has been avoided the spray system pipeline that may cause has also reduced the pressure requirement of spray system.
In the embodiment shown in fig. 5, described tubular type barrier member (10) is made up of anisodiametric concentric circles woven wire tubulose staving more than 2.Welding strengthens the support metal bar on the staving silk screen, and together is fixed between filler gripper shoe and the hold-down grid, and its position is fixing by supporting backstay (13).The quantity of woven wire staving and diameter are determined by absorbing tower diameter.Gas in by each separated vertical cylinder on flow, changed the distribution of gas in the major diameter tower, make gas more even, the space between per two barrier members (10) is equivalent to a small-sized packed tower.Therefore, " enlarge-effect " that has solved the scale-up problem of tower body and brought thus.
The above only is a preferred implementation of the present invention.Should be pointed out that same principle of invention, can also make many modification and improvement, when belonging to protection scope of the present invention for foundation the present invention.
Claims (8)
1. novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, tower body comprises absorption tower body case (1), the admission line of cat head (2), gas vent (3), the rotary demist dewater unit (12) of tower internal upper part, filler gripper shoe (8), hold-down grid (9) and filler (11) in the tower, concentric tube type barrier member (10) in the middle of the filler, circular spray tube liquid distributor (6) on the hold-down grid (9), the contrary spray apparatus (7) of heavy caliber in the admission line, the absorption slurries pond (21) of tower inner bottom part.It is characterized in that: be positioned at the contrary spray apparatus (7) of heavy caliber of admission line bottom and the foam uptake zone (15) that forms, be fixed on the concentric tube type barrier member (10) between filler gripper shoe (8) and the hold-down grid (9), and be welded on the following flow deflector (14) of filler gripper shoe (8), made regular ciculation fluidized motion and spinning motion by the Ball-type packing (11) that concentric tube type barrier member (10) is separated.
2. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that: described barrier member (10) is made up of anisodiametric concentric circles woven wire tubulose staving more than 2.Welding strengthens the support metal bar on the staving silk screen, and together is fixed between filler gripper shoe (8) and the hold-down grid (9).The quantity of barrier member (10) can be selected and mates according to the size of handled exhaust gas volumn, the diameter that absorbs tower body.
3. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that: the gas passage on described filler gripper shoe (8), the hold-down grid (9) is annular opening (16).
4. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that:, the annular opening (16) of filler gripper shoe (8) is gone up welding gas flow deflector (14), and gas is tangentially rotatablely moved.The level angle of flow deflector (14) is between the 30-45 degree.
5. according to claim 4 described novel barrier type air-actuated three-phase fluidization synthetized absorbing towers, it is characterized in that: described filling ball (11) is solid sphere, can adopt stainless steel or plastic material.Bed stuffing height is between 300-500mm.Bulk storage is between filler supporting plate and pressing plate.
6. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that: described shower liquid distributor (6) is the annular tubular structure, is erected between per two barrier members (10), 200mm-400mm place on the hold-down grid (9).The below of liquid distributor uniformly-spaced adds the uncovered nozzle of heavy caliber (18).
7. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that: the contrary spray apparatus (7) of the heavy caliber in the described inlet channel (2) is the below that is positioned at the middle inlet channel (2) of tower body, be made up of shower and the uncovered nozzle of some heavy calibers, spray caliber and nozzle quantity are determined according to the size and the channel diameter of gas treatment amount.
8. according to claim 1 described novel barrier type air-actuated three-phase fluidization synthetized absorbing tower, it is characterized in that: the gas flow rate in the described inlet channel (2) is 10-15m/s, and the absorption liquid with contrary spray below passage bumps against, and forms foam uptake zone (15).
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