CN101301574B - Multistage flue gas desulfurization spray tower - Google Patents

Multistage flue gas desulfurization spray tower Download PDF

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Publication number
CN101301574B
CN101301574B CN2008100035289A CN200810003528A CN101301574B CN 101301574 B CN101301574 B CN 101301574B CN 2008100035289 A CN2008100035289 A CN 2008100035289A CN 200810003528 A CN200810003528 A CN 200810003528A CN 101301574 B CN101301574 B CN 101301574B
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CN
China
Prior art keywords
spray tower
flue gas
desulfurization
tower
desulfuration
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CN2008100035289A
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Chinese (zh)
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CN101301574A (en
Inventor
樊运甫
汪洋
吴树志
许正涛
李永旺
张明
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北京博奇电力科技有限公司
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Priority to CN2008100035289A priority Critical patent/CN101301574B/en
Publication of CN101301574A publication Critical patent/CN101301574A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/505Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound in a spray drying process

Abstract

In order to improve the design and reasonably optimize the conventional desulfurizing tower, the technical scheme of the invention provides a multistage flue gas desulfurization spray tower which comprises a primary desulfurization washer and a secondary desulfurization spray tower, wherein, the outlet of the primary desulfurization washer communicates with the inlet of the secondary desulfurization spray tower. The primary desulfurization washer comprises a primary desulfurization absorption slurry spray layer for spraying the absorption slurry to be reacted with the flue gas. The multistage flue gas desulfurization spray tower also comprises a reflux pipe connected between the bottom of the primary desulfurization washer and the secondary desulfurization spray tower, and therefore, the absorption slurry can flow back to the secondary desulfurization spray tower through the reflux pipe. The multistage flue gas desulfurization spray tower realizes the first desulfurization in the primary desulfurization washer and realizes the second desulfurization in the secondary desulfurization spray tower, thereby greatly reducing the boundary dimension of the spray tower, reducing the gas liquid ratio and the flux pump lift of the recycle pump, reducing the energy consumption, and saving cost.

Description

Multistage flue gas desulfurization spray tower
Technical field
The present invention relates to a kind of flue gas processing device that can be applied to the thermal power plant, particularly a kind of wet flue gas desulfurization spray column that is applicable to large-scale thermal power station power boiler efficiently.
Background technology
At present the flue gas desulfurization technique introduced of big limestone-gypsum wet desulphurization technology company of domestic several families is mainly from Japanese weak source company 1); 2) Kawasaki, Japan heavy industry; 3) Germany is than Xiao Fu company; 4) this smooth Miller company of Germany; 5) U.S. Marsulex Environmental Technology AS; 6) U.S. Ba Wei (B﹠amp; W) company; 7) Austria Energy and Environment joint-stock company (AEE); 8) French Alstom (ALSTON) company; 9) nine tame flue gas desulfurization technique support sides such as Mitsubishi Heavy Industries Ltd, the tower of applied fume desulfurizing tower adopts design concepts such as spray, bubbling, fluid column more.
Do with regard to the overview of existing flue gas desulfurization technique below and briefly describe, so that understand the present invention more fully.
(1) smoke absorption principle
Spray column:
Absorb slurries and spray into spray column, form huge gas-liquid contact surface, cover the whole section of spray column thereby be dispersed into tiny drop by nozzle atomization.These drops contact with flue gas adverse current in the tower, mass transfer and absorption reaction take place, the SO in the flue gas 2, SO 3And HCl, HF are absorbed.SO 2Gypsum is finished and finally formed to the oxidation of absorption product and neutralization reaction in the zoneofoxidation of spray column bottom.In gas-liquid two-phase mass transfer system, flue gas is a continuous phase, and slurries are decentralized photo.Mainly by dispersant liquid drop improving mass transfer surfaces, thereby improve mass transfer rate.
Bubble tower:
Flue gas evenly is distributed in the slurries by thousands of playpipes and goes, the flue gas that sprays into slurries is at the inner bubble that produces of slurries, produce boiling shape bubble and emersion slurries after forming dual-phase jet, the abundant haptoreaction of flue gas and slurries generates calcium sulfite in this process, oxidation air enters from the bottom of bubbling reactor, be evenly distributed in the slurries through distribution pipeline, make CaSO 3Be oxidized to CaSO 4In gas-liquid two-phase mass transfer system, slurries are continuous phase, and flue gas is a decentralized photo.The main renewal by air-flow high velocity jet quickening bubble surface liquid film improved mass transfer rate.
Liquid column tower:
Slurries upwards spray fluid column by the nozzle on the female pipe that is arranged in the tower, slurries contact with flue gas for 2 times when rising and fall, longer in the reaction zone time of staying, the liquid that falls impinges upon a large amount of drop of formation in the tower mutually with the absorption slurries of upwards ejection, improve the contact area of gas-liquid greatly, therefore had excellent desulfurization performance.In gas-liquid two-phase mass transfer system, flue gas is a continuous phase, and slurries are decentralized photo.Mainly by dispersant liquid drop improving mass transfer surfaces, thereby improve the mass transfer mass transfer rate.
(2) various tower characteristics
Spray column
1) spray column be configured to the cylinder tower, contain the type flue in the top layout that has, demister can be arranged by low level like this;
2) adopt two-way or helical form nozzle, the ring-shaped liquid film gas liquid contacting efficiency height that is sprayed can reach efficient absorption performance and high dust removal performance, simultaneously, as adopting spiral nozzle, for nozzle exit pressure is low, needs the power of pump little, energy-conservation;
3), reach lower resistance, energy-conservation effect by the most moderateization and the favorably situated guide vane of flue gas flow rate;
4) the water droplet effect that removes that spray column export department has can reduce the demister load, guarantees that demister outlet water droplet is up to standard;
5) spray column inside only is furnished with nozzle, simple structure and do not have fouling to stop up;
6) by control pump operation platform number, can reach economical operation at the variation of load;
7) spray system adopts the design of unit system, and each spraying layer is joined one and is attached thereto the spray column slurry circulating pump that connects.
Bubble tower
1) has very big operating flexibility, can regulate the immersion liquid degree of depth automatically, thereby regulate the blade of booster fan, reach minimum energy consumption with this according to different sulfur-bearing operating modes;
2) suitable fuel is extensive, even is applicable to and contains high concentration of aluminium, fluoride and muriatic coal;
3) because its stripping liquid is a continuous phase, flue gas then is to spread phase, and the quick renewal that sprays into the bubble surface of slurries has improved mass transfer rate, so have very high desulfurization and efficiency of dust collection;
PH value is lower during 4) because of its running status, and between 4.5-5.5, so its oxidation reaction is complete, the utilization rate of lime stone is very high, and is less scaling greatly;
5) the gypsum crystallization particle diameter is big, and quality better is convenient to gypsum dehydration;
6) this technology is applicable to that middle high sulfur content, the unit that the sulphur content excursion is bigger use.
Liquid column tower
1) because the female pipe arrangement of whitewashing is lower, and the height of liquid column tower is lower than traditional absorption tower, absorption tower recirculation pump pressure head is reduced, capable of reducing energy consumption;
2) slurries of liquid column tower contact with flue gas for 2 times when rising and fall and carry out desulfurization, slurries are long in the reaction zone time of staying, the liquid that falls impinges upon a large amount of drop of formation in the tower mutually with the absorption slurries of upwards ejection, has improved the contact area of gas-liquid greatly, therefore has high desulfuration efficiency;
3) the liquid column tower crushing is lower than traditional spray column;
4) liquid that falls carries out from flushing shower and nozzle, non flouling behaviour, and shotcrete pipe has only 1 layer, and maintenance is easily;
5) spray system adopts the piping-main scheme design, disposes Duo Tai absorption tower slurry circulating pump as required, not limited by the separate unit pump flow;
6) because adopt not have press nozzle, so the design of liquid column tower is applicable to more high solid granule density, and gypsum slurries operation concentration reaches 30%, helps the raising of absorption efficiency, and improves the gypsum quality.
Summary of the invention
Technical problem to be solved by this invention is: existing tower is carried out design improvement, reasonably optimizing, fully contrasting on the basis of each tame desulfuration absorbing tower technology, draw the advantage in above-mentioned each family's design, a kind of flue gas desulfurization spray tower that is adapted to the desulfur technology of wet type limestone-gypsum is provided, makes that it cuts down the consumption of energy, investment and operating cost.
Technical scheme of the present invention provides a kind of multistage flue gas desulfurization spray tower, comprises elementary desulfurizing scrubber and secondary desulfuration spray tower, and the outlet of described elementary desulfurizing scrubber is connected with the inlet of described secondary desulfuration spray tower.In fact this elementary desulfurizing scrubber is embodied as the cold washer of cigarette, comprises that elementary desulfurization absorbs the slurries spraying layer, is used to spray the absorption slurries for the treatment of with smoke reaction, and these absorption slurries can be implemented as lime stone slurry.Lime stone slurry is introduced to the cigarette cold wash and washs pump intake, thereby lime stone slurry is fully utilized.Described secondary desulfuration spray tower is actually main absorption tower, also abbreviates spray column hereinafter sometimes as.
This multistage flue gas desulfurization spray tower also comprises return duct, and described return duct is connected between the bottom and described secondary desulfuration spray tower of the cold washer of cigarette, thus, absorbs slurries and is back to described secondary desulfuration spray tower through this return duct.
The design advantage of multistage flue gas desulfurization spray tower of the present invention and the technique effect that can realize are:
The design concept of this multistage flue gas desulfurization spray tower is simple and practical: dexterously cold washer of cigarette and spray column are organically combined, be designed to a kind of pre-wash device that is different from the traditional idea.Like this, utilize the preceding flue of spray column inlet to form the cold washer of cigarette, once desulfurization in the cold washer of cigarette, secondary desulfurization in spray column, thus reach the purpose that reduces spray column appearance and size greatly and reduce liquid-gas ratio and pump flow lift.
Change the method that traditional absorption slurries (for example lime stone slurry) directly advance tower, the present invention adopts lime stone slurry to wash the pump intake adding by the cigarette cold wash, join the spraying layer nozzle of the cold washer of cigarette by the cold washing pump of cigarette, realize the even mixing of lime stone slurry.
Fresh lime stone slurry is ejected into the cold washer of cigarette by cold washing pump of cigarette and spray ozzle, not only can realize the purpose of cooled flue gas in the cold washer of cigarette, can also reach the effect of obvious raising once desulfurization effect.
SO 2After in the cold washer of cigarette, realizing removing in advance, can make the SO in the flue gas 2Content reduces (being adapted to sulphur coal especially) greatly, and the liquid-gas ratio that secondary removes in the spray column just can reduce significantly like this.
Owing to enter the interior SO of the flue gas of spray column 2Content reduces greatly, under the constant situation of exit concentration, must cause the minimizing of the absorption slurries spraying layer quantity of spray column, thereby realizes cost savings.
Because the liquid-gas ratio that secondary removes in the spray column reduces, and must cause the minimizing of recycle slurry liquid measure, thereby realize a large amount of minimizings of nozzle quantity, realize the reduction of nozzle purchase cost.
The minimizing of the absorption slurries spraying layer quantity of spray column will cause the reduction of spray column height; The minimizing of slurries internal circulating load will cause the height in spray column slurries pond to reduce, and this can both realize that the spray column material cost reduces.
Because the slurries pond diminishes, required agitator quantity must tail off, thereby realizes the reduction of purchase cost.
Because the diminishing of slurries pond, step-down, and enter SO in the flue gas of spray column 2Concentration reduces, and oxidation fan flow and pressure head that it is required must reduce, thereby realizes cost savings.
Owing to the minimizing of recycle slurry liquid measure, reduce the flow of spray column circulating pump greatly; Because the spray column tower height reduces, and must cause the reduction of circulating pump lift; So just realize the saving significantly of circulating pump purchase cost, particularly for the desulfurizing item of sulphur coal and 1,000,000 units, the domestic circulating pump of can't realizing domesticizes, and its cost advantage is particularly evident.
The minimizing of pump flow and lift will cause power of motor to reduce significantly, thereby realize energy-conservation.
Because the ingenious combination of cold washer of cigarette and spray column, the dried wet interface of spray column porch will no longer produce, thereby reduce the amount of purchase that spray column porch C276 pastes lining (a kind of anticorrosion alloy) in a large number, realize cost savings (the cold washer of cigarette porch only need be brushed the pyroceram scale by experience and be got final product).
Owing to increase the cold washer of cigarette before the spray column inlet, the temperature that enters the flue gas of spray column is reduced to about saturation temperature 50 degree, has so both protected the spray column lining, prolongs its service life, can protect spraying layer in the tower again.
Description of drawings
Followingly illustrate according to a preferred embodiment of the invention in conjunction with example with reference to accompanying drawing, wherein:
Accompanying drawing 1 is the sketch according to the column multistage flue gas desulfurization spray tower of first embodiment of the invention, and this tower has the cold washer of vertical cigarette;
Accompanying drawing 2 is the sketch of the multistage flue gas desulfurization spray tower of turning back according to the flue gas of second embodiment of the invention, and this tower has the cold washer of vertical cigarette; And
Accompanying drawing 3 is the sketch according to the column multistage flue gas desulfurization spray tower of third embodiment of the invention, and this tower has the cold washer of horizontal cigarette.
The corresponding relation of the parts that Reference numeral and its referred among the figure is:
1, the cold washer of cigarette inlet, 2, fresh water (FW) moisturizing spraying layer, 3, accident cool water shower layer, 4, the cold washer spraying layer of cigarette, 5, elementary desulfurizing scrubber (being also referred to as the cold washer of cigarette), 6, the cold washing pump of cigarette, 7, absorb slurry pipe, 8, return duct, 9, expansion joint, 10, the absorption slurries spraying layer in the secondary desulfuration spray tower (also abbreviating spray column as), 11, dividing plate, 12, spray column outlet, 13, the slurries pond, 14, demister.
The specific embodiment
First embodiment
With reference to Fig. 1, the column multistage flue gas desulfurization spray tower according to first embodiment of the invention is described below.
The elementary desulfurizing scrubber of present embodiment (the cold washer of cigarette) 5 is configured to utilize the tower of secondary desulfuration spray tower inlet flue structure before, wherein is disposed with the cold washer inlet 1 of cigarette, fresh water (FW) moisturizing spraying layer 2, accident cool water shower layer 3, the cold washer spraying layer 4 of cigarette from top to bottom.In addition, the control valve and the return duct 8 thereof that will absorb slurries (being preferably lime stone slurry) pipeline are arranged near on the orlop platform of the cold washing pump 6 of cigarette, absorb the inlet that slurry pipe 7 is linked the cold washing pump 6 of cigarette then.Like this, come the lime stone slurry of self-absorption slurry pipe 7 to be entered the cold washer of cigarette, arrive the cold washer spraying layer 4 of cigarette by cold washing pump 6 pumpings of cigarette.Flue gas enters from the cold washer inlet 1 of the cigarette of the top, arrives the cold washer spraying layer 4 of cigarette equally.Here, fresh lime stone slurry with the abundant haptoreaction of flue gas, is finished the once desulfurization in the cold washer 5 of cigarette through the nozzle ejection of the cold washer spraying layer 4 of cigarette.The nozzle of the cold washer spraying layer 4 of cigarette preferably adopts the structure of two outlets up and down, so that strengthen mix uniformly effect.
As shown in Figure 1, the secondary desulfuration spray tower of present embodiment is column structure roughly, is disposed with slurries pond 13, secondary desulfuration spray tower inlet, secondary desulfurization from bottom to up and absorbs slurries spraying layer 10, demister 14 and spray column outlet 12.Fall the slurries of the cold washer of cigarette 5 bottoms and will finish the even mixing of lime stone slurry by the slurries pond 13 of returning spray column through return duct 8 gravity flows that drains mouthful of this bottom.
The cold washer 5 of cigarette is connected with spray column by expansion joint 9, and after the once washing desulfurization, wet flue gas enters the spray column inlet from the cold washer outlet of cigarette through expansion joint 9, further absorbs slurries spraying layer 10 through secondary desulfurization and carries out the secondary desulfurization.Afterwards, clean flue gas enters clean flue entrance from spray column outlet 12, finishes desulfurization operations.
Second embodiment
With reference to Fig. 2, the multistage flue gas desulfurization spray tower of turning back according to the flue gas of second embodiment of the invention is described below.
Identical among the structure of the elementary desulfurizing scrubber of present embodiment and first embodiment, so structure and/or the identical parts of function have adopted identical Reference numeral to represent among these two embodiment.
As shown in Figure 2, be different from first embodiment, the secondary desulfuration spray tower of this second embodiment is a flue gas Zigzag type structure.That is to say, spray column comprises that the slurries pond 13, the spray column inlet that are positioned at below, the secondary desulfurization that is arranged on spray column inlet top absorb slurries spraying layer 10, are arranged on the spray column outlet 12 and the dividing plate 11 on spray column inlet opposite, generally perpendicularly extend to the position that is lower than cat head at the bottom of the tower of its median septum 11 and spray column, spray column inlet and 10 both and the spray columns outlets 12 of secondary desulfurization absorption slurries spraying layer are separated.Like this, enter the spray column inlet from the cold washer outlet of cigarette through expansion joint 9, further move upward and carry out the secondary desulfurization through secondary desulfurization absorption slurries spraying layer 10 through the wet flue gas after the once washing desulfurization.Afterwards, clean flue gas passes the space that forms between the top edge of dividing plate 11 and the cat head and falls after rise, and like this, the drop in the flue gas can be come out by inertial separation, and finally the flue gas through inertial separation enters clean flue entrance from spray column outlet 12, finishes desulfurization operations.
In above-mentioned two embodiment, elementary desulfurizing scrubber 5 has all been taked vertical structure, that is, the main body of washer 5 is vertically extended basically, and the axis of the inlet of washer and the axis of outlet are perpendicular.The spray column structure of (GGH) that this vertical washer is specially adapted to possess gas-gas heat exchanger.
The 3rd embodiment
With reference to Fig. 3, the column multistage flue gas desulfurization spray tower according to third embodiment of the invention is described below.
Identical among the elementary desulfurizing scrubber of present embodiment and the structure of secondary desulfuration spray tower and first embodiment, only variation has taken place in the residing orientation of elementary desulfurizing scrubber of present embodiment.Therefore structure and/or the identical parts of function have adopted identical Reference numeral to represent among these two embodiment.
As shown in Figure 3, look on-the-spot physical condition, elementary desulfurizing scrubber 5 can adopt horizontal structure, that is, the main body of washer 5 is essentially horizontally extended, and the axis of the inlet of washer parallels with the axis of outlet, and two axial lines coincides even.The spray column structure of (GGH) that this horizontal washer is specially adapted to not have gas-gas heat exchanger, horizontal and vertical scrubber all is more suitable for the scheme arrangement with the cancellation booster fan simultaneously.
Although the horizontal washer among this 3rd embodiment is described in conjunction with the column multistage flue gas desulfurization spray tower, but one of ordinary skill in the art will appreciate that this horizontal washer is also applicable to the multistage flue gas desulfurization spray tower of turning back of the sort of flue gas among second embodiment.
The inventor also expects, the quantity of the elementary desulfurizing scrubber in the multistage flue gas desulfurization spray tower of the present invention do not have limit.In a kind of scheme, can comprise a plurality of round the symmetrically arranged elementary desulfurizing scrubber of described secondary desulfuration spray tower, like this can be from a plurality of symmetrically arranged inlets secondary desulfuration spray tower of incident that liquidates through the flue gas of once desulfurization, avoid through near the spray dilute-phase zone the tower wall, it is more even that flue gas and absorption slurries are mixed, and further improves the efficient of secondary desulfurization.
Although the embodiment of front described the two-stage type flue gas desulfurization spray tower that comprises an elementary desulfurizing scrubber and a secondary desulfuration spray tower, but be appreciated that, the progression of multistage flue gas desulfurization spray tower of the present invention do not have yet limit, those of ordinary skills can select corresponding progression as required.Such as, in another kind of scheme, can comprise the elementary desulfurizing scrubber that n series connection is provided with, wherein the outlet of previous elementary desulfurizing scrubber is connected with the inlet of a back elementary desulfurizing scrubber, and the outlet of last elementary desulfurizing scrubber is connected with the inlet of described secondary desulfuration spray tower.Like this, carry out in main spray column before the final desulfurization operations, flue gas has passed through the pre-desulfurization of n level, has strengthened desulfurized effect greatly.
Although above described the preferred embodiment of multistage flue gas desulfurization spray tower of the present invention in conjunction with the accompanying drawings, it should be understood by one skilled in the art that the present invention is not limited to the particular content of above preferred embodiment.In addition, certain functions of components of apparatus of the present invention can be realized by two or more parts, and vice versa.Generally speaking, those of ordinary skills can make various modification and improvement under the situation of the scope of the invention that does not exceed the qualification of accompanying Claim book.

Claims (10)

1. a multistage flue gas desulfurization spray tower comprises elementary desulfurizing scrubber and secondary desulfuration spray tower, and the outlet of described elementary desulfurizing scrubber is connected with the inlet of described secondary desulfuration spray tower,
It is characterized in that described elementary desulfurizing scrubber comprises that elementary desulfurization absorbs the slurries spraying layer, is used to spray the absorption slurries for the treatment of with smoke reaction; And
Described multistage flue gas desulfurization spray tower also comprises return duct, and described return duct is connected between the bottom and described secondary desulfuration spray tower of described elementary desulfurizing scrubber, thus, absorbs slurries and is back to described secondary desulfuration spray tower through this return duct.
2. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, the nozzle that described elementary desulfurization absorbs the slurries spraying layer adopts the structure of two outlets up and down.
3. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, described absorption slurries are lime stone slurries.
4. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, is connected by expansion joint between the outlet of described elementary desulfurizing scrubber and the inlet of described secondary desulfuration spray tower.
5. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, the axis of the inlet of described elementary desulfurizing scrubber and the axis of outlet are perpendicular.
6. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, the axis of the inlet of described elementary desulfurizing scrubber parallels or overlaps with the axis of outlet.
7. multistage flue gas desulfurization spray tower according to claim 1 is characterized in that, comprises a plurality of round the symmetrically arranged elementary desulfurizing scrubber of described secondary desulfuration spray tower.
8. multistage flue gas desulfurization spray tower according to claim 1, it is characterized in that, comprise a plurality of elementary desulfurizing scrubbers, wherein the outlet of previous elementary desulfurizing scrubber is connected with the inlet of a back elementary desulfurizing scrubber, and the outlet of last elementary desulfurizing scrubber is connected with the inlet of described secondary desulfuration spray tower.
9. multistage flue gas desulfurization spray tower according to claim 1, it is characterized in that, described secondary desulfuration spray tower is a column structure, is disposed with slurries pond, secondary desulfuration spray tower inlet, secondary desulfurization absorption slurries spraying layer, demister and the outlet of secondary desulfuration spray tower from bottom to up.
10. multistage flue gas desulfurization spray tower according to claim 1, it is characterized in that, described secondary desulfuration spray tower comprises secondary desulfuration spray tower inlet, the secondary desulfurization that is arranged on secondary desulfuration spray tower inlet top absorbs the slurries spraying layer, be arranged on the secondary desulfuration spray tower outlet on secondary desulfuration spray tower inlet opposite, and dividing plate, generally perpendicularly extend to the position that is lower than cat head at the bottom of the tower of wherein said dividing plate and described secondary desulfuration spray tower, described secondary desulfuration spray tower inlet and secondary desulfurization are absorbed slurries spraying layer and described secondary desulfuration spray tower export and separate.
CN2008100035289A 2008-01-18 2008-01-18 Multistage flue gas desulfurization spray tower CN101301574B (en)

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CN2008100035289A CN101301574B (en) 2008-01-18 2008-01-18 Multistage flue gas desulfurization spray tower
PCT/CN2008/001585 WO2009089673A1 (en) 2008-01-18 2008-09-05 Multistage spray column for fuel gas desulfurization
CN200880114178A CN101861199A (en) 2008-01-18 2008-09-05 Multistage spray column for fuel gas desulfurization

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CN101301574B true CN101301574B (en) 2011-09-14

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CN200880114178A CN101861199A (en) 2008-01-18 2008-09-05 Multistage spray column for fuel gas desulfurization

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CN101301574B (en) * 2008-01-18 2011-09-14 北京博奇电力科技有限公司 Multistage flue gas desulfurization spray tower
CN101670231B (en) * 2009-07-23 2011-08-24 何金整 Device and process for converting calcium process desulfurization into temperature difference crystallizing ammonia process desulfurization
CN102049167B (en) * 2009-10-27 2013-01-09 中国石油化工股份有限公司 High-SO2 concentration pressure smoke desulfuration method and device
CN102101012A (en) * 2011-02-14 2011-06-22 中电投远达环保工程有限公司 Smoke pre-desulfuration system
CN102230635B (en) * 2011-05-11 2013-06-05 北京世能中晶能源科技有限公司 Treatment system and method of smoke
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