CN108479368A - A kind of micro- eddy flow deep desulfuration dedusting absorption tower device and technique - Google Patents
A kind of micro- eddy flow deep desulfuration dedusting absorption tower device and technique Download PDFInfo
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- CN108479368A CN108479368A CN201810216754.9A CN201810216754A CN108479368A CN 108479368 A CN108479368 A CN 108479368A CN 201810216754 A CN201810216754 A CN 201810216754A CN 108479368 A CN108479368 A CN 108479368A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a kind of micro- eddy flow deep desulfuration dedusting absorption tower device and its techniques, including absorption tower, smoke inlet is followed successively by uniformly distributed mass transfer device from the bottom to top in absorption tower, primary spray equipment, micro- cyclonic absorber, two level spray equipment and high efficiency demister, micro- cyclonic absorber includes holder and rack-mount several eddy flow plate modules, partition board is arranged in vertical direction between adjacent eddy flow plate module, micro- eddy flow plate module includes top plate and micro- spiral board on top plate, micro- spiral board includes blind plate, the swirl vane being arranged around blind plate and the cover cylinder being fixed on the outside of swirl vane, the blind plate bottom is inverted conical, cover cylinder top is fixed through top plate and with top plate.Apparatus of the present invention are simple in structure, can modularized production, be easily installed and overhaul；Technique is simple and direct, substantially reduces liquid-gas ratio, realizes and saves energy consumption；Also there is collaboration to administer SO simultaneously3Effect.
Description
Technical field
The present invention relates to a kind of micro- eddy flow deep desulfuration dedusting absorption tower device and its techniques, belong to energy conservation and environmental protection exhaust gas and control
Reason field is suitable for the purification treatment of flue gas desulfurization and dedusting minimum discharge.
Background technology
SO in flue gas at present2Ultralow purified treatment mainly in hollow-spraying-tower technology, using increase stream carry effect plate,
Increase the measures such as the spray number of plies, raising liquid-gas ratio, desulfurization synergistic ring and zonal control and optimizes transformation, conditional place
Using desulfurizing tower series connection synergistic process, SO is realized2Concentration of emission is no more than 35mg/Nm3.The ultralow purified treatment of dust in flue gas
Mainly realize that dust reaches using the larger complicated dedusting demister of wet electric precipitator or other running resistances in desulfurizing tower end
Mark discharge.Although above-mentioned desulfurization and dedusting puies forward effect technology using relatively broad, problems are still remained：First, increase spray
Layer usually requires to increase original desulfurization tower height degree, considerably increases investment cost and transformation period；It is needed in addition, improving liquid-gas ratio
Additional increase or transformation and upgrade desulfuration recycle pump, to increase the energy consumption in operational process.Although wet electric precipitator dedusting
Effect is preferable, but exists and involve great expense the shortcomings of larger with energy consumption.
Patent WO2016050030A1 discloses a kind of rotation and converges coupling ultra-clean desulphurizing and dust-removing integral system and its desulfurization
Dust removal method, core component eddy flow coupling device is arranged in above flue entrance between spraying layer in the system, swirl cylinder with
It is connected by sealing plate between swirl cylinder, there are problems：One, it is easily made because flue gas flow field is uneven and sprayed slurry is uneven
At leakage cigarette phenomenon, flue gas enters in desulfurizing tower, and flue gas flow field is uneven, can not ensure that flue gas even into each swirl cylinder, is led
Cause the swirl cylinder stream tower reactor that a large amount of slurries enter from smokeless, gas-liquid mass transfer effect poor；Two, swirl cylinder and swirl cylinder are not closely
Together, effective area of passage is small, and gas velocity is big in cylinder, and the larger liquid-gas ratio of Multi-layer sprinkling cause rotation converge coupling device compared with
It is run under big resistance, comprehensive energy consumption is higher；Three, the liquid-gas ratio that the operation of eddy flow coupling device needs is larger, in relatively low liquid-gas ratio
Lower operation desulfurization and dedusting effect is poor.Four, rotation converges coupling device above smoke inlet, high SO in flue gas2Concentration is converged in rotation
Removing is preferable in coupling device, and low concentration SO2(it is less than 300mg/Nm3) air film resistance is larger, SO2Molecule and droplet collision
Probability is smaller, poor using Multi-layer sprinkling removal effect, to cause deep desulfuration scarce capacity.
A kind of circulating fluidized bed boiler deep desulfuration dust pelletizing system disclosed in patent CN106582249 is in patent
CN201735324U is disclosed to be arranged briquetting about eddy flow coupling desulfurization dust-extraction unit to eddy flow, and there is no substantive to dash forward
It is broken, there is patent WO2016050030A1 problem encountered.
To solve the above-mentioned problems, a kind of micro- eddy flow deep desulfuration dedusting absorption tower device provided by the invention and technique,
Desulfurization twice is sprayed by inlet flue gas middle and high concentration SO to flue gas rectification and primary through uniformly distributed mass transfer2It is down to 1000mg/Nm3Below
Achieve the purpose that preliminary desulfurization and dedusting；For the sulfur dioxide of low concentration, due to being limited by air film resistance, this part dioxy
Change sulphur removing difficulty is larger, and by the micro- cyclonic absorber installed in tower, micro- spiral board number is more, and gas good dispersion avoids
Part leakage cigarette phenomenon, the turbulent region of formation hold liquid layer droplet distribution, extend the utilization rate of slurries residence time raising desulfurizing agent,
It is low using small liquid-gas ratio spray resistance.The high pH small particle size droplets that high-efficiency atomizing nozzle sprays carry out the 4th time to flue gas again and wash
It washs, achievees the purpose that deep desulfuration dedusting, the present invention provide micro- eddy flow deep desulfuration dedusting absorption tower device and hardly possible are transformed to old tower
Spend low, it is convenient that the installation of micro- cyclonic absorber modularization is replaced, and higher desulfuration efficiency can be reached under smaller liquid-gas ratio, saves
Energy consumption.
Invention content
Dirt is absorbed the present invention provides a kind of micro- eddy flow deep desulfuration and receives tower apparatus and its technique, and core is inhaled for micro- eddy flow
Device is received, the apparatus structure is simple, is transformed convenient for old tower minimum discharge, modularization installation good to a variety of pollution synergetic regulation effects
And replacement, it is easy to operate.Micro- rotation enhancing device can improve gas-liquid mass transfer efficiency and improve the utilization rate of desulfurizing agent, using the work
The flue gas that skill is administered obtains efficiently administering purification, the SO in neat stress2Content is less than 35mg/Nm3, smoke content be less than 5mg/
Nm3, realize flue gas minimum discharge.
A kind of micro- eddy flow deep desulfuration dedusting absorption tower device, including absorption tower, absorption tower lower sidewall setting flue gas enter
Mouthful, exhanst gas outlet is arranged in top, and bottom is slurries regenerated reactor in absorption tower, in absorption tower above smoke inlet from the bottom to top successively
For uniformly distributed mass transfer device, primary spray equipment, at least one layer of micro- cyclonic absorber, two level spray equipment and advanced demister；It is described
Micro- cyclonic absorber includes holder and rack-mount several micro- eddy flow plate modules, is arranged between adjacent micro- eddy flow plate module
Vertical baffle, micro- eddy flow plate module include top plate and several micro- spiral boards on top plate, micro- spiral board include blind plate,
Swirl vane around blind plate setting and the cover cylinder being fixed on the outside of swirl vane, blind plate bottom is inverted conical, cover cylinder top
It is fixed through top plate and with top plate, several drainage holes is opened up on top plate, drainage hole bottom is connected with downspout.
Preferably, at least two layers spray is arranged in the primary spray equipment, and 1 or 2 layer of spray is arranged in two level spray equipment, often
Layer spray equipment is connected by pipeline, circulating pump with slurries regenerated reactor, and circulating-pump outlet is indirectly to spraying layer suction line
Enter desulfurizing agent flow inlet line；The advanced demister includes flat defogger and the cyclone defroster above flat defogger
Technique water flushing device is arranged in device between flat defogger and cyclone demister.
Primary spray equipment is preferably provided at least two layers spray, specifically regards entrance SO2Depending on concentration, two level spray is preferably set
1 layer of spray is set, every layer of spray equipment is connected by pipeline, circulating pump with interior tower reactor, and circulating-pump outlet is to spraying layer inlet tube
Desulfurizing agent flow inlet line is accessed between line, flow inlet line is the concentration variation because of flue gas load variation and sulfur dioxide in flue gas
Quickly to adjust every layer of required slurry pH value of spray；Flat defogger is installed in the mist eliminating zone and is located at flat defogger
Technique water flushing device is arranged in the whirlwind high efficiency demister of top between flat defogger and whirlwind high efficiency demister.
Preferably, the setting number of plies of micro- cyclonic absorber is 1~5 layer
Preferably, the swirl vane number of micro- spiral board is 8~24, and the blade elevation angle is 30~80 °, blade radial angle
It it is 0~30 °, both ends of the blade is connected with circular cone blind plate outer wall and cover cylinder inner wall respectively, and the air inlet and outlet end of blade opens 30~60 ° °
(preferably 45 °) chamfering reduces flue gas resistance.
Preferably, the cover cylinder internal diameter is 30~200mm, and cover cylinder upper end outlet is blind higher than 0~30mm of swirl vane upper edge
Board diameter is the 5%~30% of cover cylinder internal diameter；It is further preferred that cover cylinder upper end outlet higher than swirl vane upper edge 10~
30mm。
Preferably, the top plate is horizontally arranged at the position that 0~50mm (further preferably 0~30mm) is exported less than cover cylinder
It sets, cover cylinder passes through top plate and connect with top plate, and top plate is square or round, length or a diameter of 600~1500mm, micro-
Several drainage holes are opened on the top plate of spiral board surrounding, the slurry pipe is L-type slurry pipe；The drainage hole and slurry pipe
Diameter is 10~20mm, 30~80mm of pipe range.
Preferably, the divider height is 50~100mm, and the middle part that top plate plant tilting direction is parallel on the partition board is uniform
Opening N, (N takes 1,2,3, and it is 10~20mm preferably to take 2) row's deflector hole, aperture.Setting partition board ensures that an eddy flow module is formed centainly
Turbulent region in homogeneous thickness plays a guiding role to the flue gas that eddy flow is gone out in addition, promotes to eventually pass through eddy flow module
Flue gas rise in an axial direction.Deflector hole effect is that the slurries thickness balanced caused by non-uniform spraying above eddy flow module differs,
Reduce flue gas bias current.
Micro- cyclonic absorber in micro- eddy flow deep desulfuration dedusting absorption tower device provided by the invention is raising of the present invention
The key technology of desulfuration efficiency.Larger-size spiral board is easy to cause in central area " empty since flue gas eddy flow radius is larger
Hole ", peripheral regions slurry droplet density is larger, and gas-liquid mass transfer effect is poor, and the bright micro- cyclonic absorber of this law is using small micro-
Spiral board, size is smaller, and unit cross-sectional area number is more, and Gas-Liquid Dispersion is good, and gas-liquid contact probability increases, and improves desulfuration efficiency.
Spiral board blind plate is designed to that inverted conical and blade air inlet and outlet end open chamfering, reduces flue gas and hits the resistance that spiral board generates
Power keeps micro- eddy flow mass transfer device drag overall smaller.Top plate begin to rehearse fluid apertures installation slurry pipe, realize gas-liquid runner separation, avoid mutually
Cause clogging.Using the disturbance of the turbulent region of micro- eddy flow, reduces air film and liquid-film resistance improves overall mass transfer coefficient, to
Improve desulfuration efficiency.
The present invention also provides a kind of micro- eddy flow deep desulfuration dust collecting process, are carried out preferably in apparatus of the present invention, including with
Lower step：
(1) flue gas enters absorption tower by smoke inlet, and the drop that primary spray equipment sprays is fallen on uniformly distributed mass transfer device
Side, the air-flow for being through uniformly distributed mass transfer device hole are lifted to which liquid layer is held in formation above it, and flue gas passes through after this holds liquid layer
It crosses once desulfurization dedusting washing and flue gas flow field obtains rectification, flue gas continues to rise the drop sprayed with primary spray desulfurization nozzle
Reverse contact, flue gas are washed by second of desulfurization and dedusting, SO in the flue gas after second of desulfurization and dedusting washs2Concentration drops
To less than 1000mg/Nm3；
(2) accelerate to rotate upwardly through micro- eddy flow sheet separation by the flue gas of primary desulfurization and dedusting, two neighboring micro- eddy flow
Two strand high speed rotation air-flows of the plate next to side mutually collide, and two level spray is sprayed the liquid fallen to above micro- eddy flow module
Drip " tearing up " at the smaller drop of grain size, droplet rises with air-flow, and drop agglomeration falls again, so on circulate to
Strong turbulence region is formed above top plate, flue gas continuously passes through strong turbulence region, and the slurries in strong turbulence region are eventually by row
Fluid apertures is discharged into slurries regenerated reactor along downspout；
(3) flue gas washed through micro- cyclonic absorber turbulent region continues to rise, and is sprayed with two level spray equipment atomizer
The high ph-values drop gone out inversely contacts washing, SO in flue gas2It is removed completely, the neat stress after four times washings is advanced
Under demister effect, after removing the droplet in most of flue gas, discharged by chimney breast.
Flue gas enters absorption tower by entrance, and primary spray sprays the air-flow that the drop to fall is through uniformly distributed mass transfer device hole
The effect of lifting and then certain thickness (general 1~10cm) is formed above uniformly distributed mass transfer device holding liquid layer, flue gas holds liquid by this
Rectification is obtained by once desulfurization dedusting washing and flue gas flow field after layer, flue gas continues to rise inverse with the drop of primary spray ejection
To contact, flue gas is washed by second of desulfurization and dedusting, by entering SO in desulfurizing tower inlet flue gas2Primary is accordingly arranged in concentration
The number of plies of spray makes SO in the flue gas after primary spray washing2Concentration is brought down below 1000mg/Nm3, big in flue gas in addition
Part SO2The dirt particle larger with grain size is removed；
Accelerate to rotate by micro- eddy flow sheet separation by the flue gas of primary desulfurization and dedusting, two neighboring micro- spiral board is located next to
Two strands of side high speed rotation air-flow mutually collides, and two level wash spray, which is sprayed the drop fallen to above eddy flow plate module, " tears
It is broken " at the smaller drop of grain size, rise with flue gas, to form the strong rapids of certain altitude (general 10~30cm) above top plate
Region is flowed, each eddy flow plate module independently forms a strong turbulence region, slurries in each strong turbulence region unit space
Dropping liquid quantity is big, increases gas-liquid mass transfer contact specific surface, improves SO2Absorption rate；Grain size smaller drop and droplet collision
Probability increases, and increases fine dust capture rate.Absorb SO2Desulfurizer slurry pH value afterwards is relatively low, and liquid layer increasing is held above micro- spiral board
Add slurries in the region extended residence time, promote the dissolving of desulfurizing agent solid particle, desulfurizing agent can utilize again to be absorbed
SO2, the slurries after final desulfurization and dedusting are discharged into interior tower reactor by drainage hole along downspout；
Flue gas through turbulent region washing above micro- cyclonic absorber continues to rise, and is sprayed with two level wash spray high-efficient atomizing
The high ph-values drop that mouth sprays inversely contacts washing, SO in flue gas2It is removed completely, achievees the purpose that deep desulfuration, through depth
Neat stress after purified treatment after removing the droplet in most of flue gas, passes through chimney breast under the effect of advanced demister
Discharge.
Preferably, the liquid-gas ratio that the primary sprays every layer of spray is 3~8L/Nm3, tower reactor slurry pH value be 4.5~
6.0；The liquid-gas ratio that the two level sprays every layer of spray is 0.1~6L/Nm3, spraying layer inlet slurry pH value is 5.5~7.0.
Preferably, SO in micro- eddy flow mass transfer device inlet flue gas2Concentration is less than 1000mg/Nm3SO in exiting flue gas2Concentration is low
In 35mg/Nm3。
Preferably, it includes weak base lime stone solution, lime solution, highly basic that primary spray and two level, which spray desulfurizing agent used,
Sodium carbonate and sodium hydroxide and other liquid-absorbants.
The present invention collects uniformly distributed mass transfer device rectification, the washing of secondary high efficiency spray, micro- cyclonic absorber in a desulfurizing tower
Four technologies such as washing, efficient demisting realize flue gas pollutant SO in single column3Collaboration is administered, strong gas-liquid mass transfer eddy flow module
It can be in tower internal module installation and replacement.The technology has investment cost low, and link is few, and operating cost is low, and floor space is few,
The advantages that stable and construction period is short.The technology is achieved by following technical proposals.
Compared with existing wet desulfurizing process technology, has the following advantages：
(1) it is wide to adapt to flue gas load range, holds height of liquid layer above micro- cyclonic absorber and can automatically be adjusted with flue gas flow rate
Section.
(2) sorbent utilization is high, especially solid slightly soluble desulfurizing agent, increases desulfurizing agent in the stop of turbulent region
Between, the ability of the secondary dissolving desulfurization of desulfurizing agent is improved, desulfurizing agent can repeatedly dissolve and absorb SO under identical liquid-gas ratio2。
(3) liquid-gas ratio slight drag is low, and small micro- strong gas-liquid mass transfer effect of spiral board reaches small liquid-gas ratio high desulfurization efficiency and section
The about purpose of energy consumption.
(4) gas-liquid mass transfer good absorption effect, the gas-liquid turbulent region Gas-Liquid Dispersion that small micro- rotation generates is good, slurries and flue gas
Large specific surface area is contacted, mass-transfer efficiency is improved.
(5) to SO in flue gas3There is higher removing, realizes that multiple pollutant collaboration is administered.
Description of the drawings
Fig. 1 is the device of the invention structural schematic diagram.
Fig. 2 is micro- rotation mass transfer device vertical view in tower.
Fig. 3 is the vertical view of eddy flow module.
Fig. 4 is the side view of the micro- spiral board of the present invention.
Reference numeral as shown in the figure is as follows：
The absorption towers 1.1- 1.2- smoke inlets 1.3- is evenly distributed with mass transfer device
The micro- eddy flow mass transfers of 1.4- primary spray equipment 1.5- downspouts 1.6-
1.7- holder 1.8- two level spray equipment 1.9- two-stage flat defoggers
1.10- process waters rinse 1.11- high efficiency demister 1.12- exhanst gas outlets
1.13- circulating pump 1.14- slurry supply pump 1.15- slurrying kettles
The micro- spiral board 2.2- top plates 2.3- drainage holes of 2.1-
2.4- partition board
3.1- swirl vane 3.2- cover cylinder 3.3- circular cone blind plates
Specific implementation mode
A kind of micro- eddy flow deep desulfuration absorption tower apparatus, including absorption tower 1.1, the lower sidewall smoke inlet on absorption tower
1.2, exhanst gas outlet 1.12 is arranged in top, and absorb the bottom of the tower is slurries regenerated reactor；1.2 top of smoke inlet is under in its absorption tower
It is supreme to set gradually uniformly distributed mass transfer device 1.3, primary spray equipment 1.4, micro- cyclonic absorber 1.6, two level spray equipment 1.8, height
Grade demister and exhanst gas outlet 1.12.
Primary spray equipment at least layer spray (being arranged in the present embodiment two layers), every layer trickles through pipeline, circulating pump
1.13 are connected with slurries regenerated reactor；Two level spray equipment includes 1 or 2 layer of spray (one layer is arranged in the present embodiment), every layer of spray
Leaching is connected by pipeline, circulating pump 1.13 with slurries regenerated reactor, and circulating-pump outlet is de- to being accessed between spraying layer suction line
Sulphur agent flow inlet line, adjusts the slurry pH value of each spraying layer, and fresh desulfurization is added from slurrying kettle 1.15 by slurry supply pump 1.14
Agent.
Whirlwind of the high efficiency demister comprising two-stage flat defogger 1.9 and above two-stage flat defogger 1.9 is efficient
Demister 1.11 is process water rinsing area 1.10, process water between two-stage flat defogger 1.9 and whirlwind high efficiency demister 1.11
Back purge system is set in rinsing area, flat defogger and whirlwind high efficiency demister are rinsed.
The vertical view of micro- cyclonic absorber 1.6 as shown in Fig. 2, including several micro- eddy flow modules (Fig. 3), holder 1.7 and
2.4 three parts of partition board, wherein micro- eddy flow plate module is by several micro- spiral boards 2.1, top plate 2.2, drainage hole 2.3, downspout 1.5
Four parts form, and micro- spiral board 2.1 is made of (such as Fig. 4) circular cone blind plate 3.3, swirl vane 3.1 and 3.2 three parts of cover cylinder, blind
Board bottom portion is inverted conical, reduces flue gas and hits resistance, swirl vane is arranged around blind plate, and cover cylinder is fixed on outside swirl vane
Side, the 5%~30% of 3.3 a diameter of 3.1 internal diameter of cover cylinder of circular cone blind plate, 3.1 numbers of swirl vane are 8~24, and the blade elevation angle is
30 °~80 °, blade radial angle is 0~30 °, and the air inlet and outlet end of blade opens 30~60 ° of chamferings, two sections of blade respectively with blind plate
It is connected with cover cylinder inner wall.Cover cylinder internal diameter is 30~200mm, and 3.1 upper end outlet of cover cylinder is 10~30mm apart from swirl vane upper edge.
Top plate 2.2 is horizontally arranged at the position that 0~30mm is exported apart from cover cylinder 3.1, and top plate is square or round, length
Degree or a diameter of 600~1500mm open several drainage holes on the top plate of micro- spiral board surrounding, and connection L-type is starched below drainage hole
Liquid pipe；Drainage hole 2.3 and 1.5 diameter of slurry pipe are 10~20mm, 30~80mm of pipe range.1.7 both ends of holder are fixed in tower
Wall is placed the top plate with micro- eddy flow module above holder, is separated with partition board 2.4 between top plate and top plate, and divider height is 3~
8mm, partition board, which is parallel in the middle part of top plate plant tilting direction, uniformly opens N (N takes 1,2,3) row's deflector holes, and aperture is 10~20mm.
The technological process of the present apparatus is as follows：
Flue gas enters desulfurizing tower by desulfurizing tower smoke inlet, and the drop that primary spray equipment sprays is through uniformly distributed mass transfer device
Lifting of generating of air-flow act on above uniformly distributed mass transfer device formed it is certain thickness hold liquid layer, flue gas passes through after this holds liquid layer
Once desulfurization dedusting washing is crossed, flue gas flow field, which obtains rectification, keeps flow field more uniform.Flue gas continues to rise and primary spray desulfurization
The drop that nozzle sprays inversely contacts, and flue gas is washed by second of desulfurization and dedusting, makes the flue gas after primary spray washing
Middle SO2Concentration is brought down below 1000mg/Nm3, the larger dirt particle of grain size is removed.Flue gas through primary desulfurization and dedusting passes through micro-
Spiral board clearance gap accelerates rotation, and the fine drop that the high-efficient atomizing desulfurization nozzle of two level spray sprays is formed above top plate
The strong turbulence region of certain altitude, two neighboring small micro- spiral board is mutually collided next to two strands of side high-speed flow, at two strands
Under mutual impinging air flows effect, the mutually fierce collision crushing-type of drop increases at the smaller drop of grain size in unit volume tower reactor
The content of drop improves desulfurization dust-removing efficiency to improve gas liquid interfacial area.Slurries after desulfurization and dedusting are arranged along downspout
Enter slurries regenerated reactor, the flue gas washed through micro- cyclonic absorber continues to rise, the height sprayed with two level spray high-efficiency atomizing nozzle
PH value drop inversely contacts, and the neat stress after repeatedly washing removes under the effect of two-stage demister in most of flue gas
After droplet, discharged by chimney breast.
The liquid-gas ratio of primary every layer of spray of spray is 4~6L/m3, tower reactor slurry pH value is 4.5~6.0；Two level spray is every
The liquid-gas ratio of layer spray is 0.1~6L/m3, the amount by adding fresh desulfurizing agent, which controls spraying layer inlet slurry pH value, is
5.5~7.0, SO in micro- rotation absorber inlet flue gas2Concentration is less than 1000mg/Nm3, SO in exiting flue gas2Concentration is less than 35mg/
Nm3。
Embodiment 1：
Certain power plant for self-supply, 2 350MW units gas desulfurization dedusting minimum discharge improvement projects use this technique, cigarette in tower
Gas velocity 3.2m/s, SO in inlet flue gas2A concentration of 1732mg/Nm3, dust concentration is 30mg/Nm in inlet flue gas3, primary spray
It drenches area and 1 floor is set, every layer of liquid-gas ratio is 6L/Nm3, slurry pH value is 5.4~6.0；Two level spraying zone is arranged 1 layer, and liquid-gas ratio is
5.0L/Nm3, slurry pH value 6-7；Micro- spiral board cover cylinder internal diameter is 50mm, and blade number is 12, height of cover cylinder 10mm, row
Fluid apertures aperture is 12mm.SO in exiting flue gas2A concentration of 18mg/Nm3, desulfuration efficiency reaches 99.0%, and dust is dense in exiting flue gas
Degree is 3.7mg/Nm3。
Embodiment 2：
Certain printing and dyeing mill, 1 75t/h boiler fume desulfurizing and dedusting minimum discharge improvement project use this technique, flue gas in tower
Flow velocity 3.0m/s, SO in inlet flue gas2A concentration of 2072mg/m3, dust concentration is 25mg/Nm in inlet flue gas3, primary grade spray
It drenches area and 2 floor is set, every layer of liquid-gas ratio liquid-gas ratio is 5L/Nm3, slurry pH value 5.2-5.8；Two level spraying zone is arranged 2 layers, liquid gas
Than for 4.0L/Nm3, slurry pH value 6.5-7；Micro- spiral board cover cylinder internal diameter is 35mm, and blade number is 12, and height of cover cylinder is
5mm, drainage hole aperture are 12mm.SO in exiting flue gas2A concentration of 9mg/Nm3, desulfuration efficiency reaches 99.2%, in exiting flue gas
Dust concentration is 2.6mg/Nm3。
The foregoing is merely the specific implementation cases of patent of the present invention, but the technical characteristic of patent of the present invention is not limited to
This, any those skilled in the relevant art in the field of the invention, made by changes or modifications all cover the present invention it is special
Among sharp range.
Claims (10)
1. a kind of micro- eddy flow deep desulfuration dedusting absorption tower device, including absorption tower, smoke inlet is arranged in absorption tower lower sidewall,
Exhanst gas outlet is arranged in top, and bottom is slurries regenerated reactor in absorption tower, which is characterized in that in absorption tower above smoke inlet under
It is supreme to be followed successively by uniformly distributed mass transfer device, primary spray equipment, at least one layer of micro- cyclonic absorber, two level spray equipment and advanced demisting
Device；Micro- cyclonic absorber includes holder and rack-mount several micro- eddy flow plate modules, adjacent micro- eddy flow plate module
Between vertical baffle is set, micro- eddy flow plate module includes top plate and several micro- spiral boards on top plate, micro- spiral board
The swirl vane being arranged including blind plate, around blind plate and the cover cylinder being fixed on the outside of swirl vane, blind plate bottom are inverted conical,
Cover cylinder top is fixed through top plate and with top plate, several drainage holes is opened up on top plate, drainage hole bottom is connected with downspout.
2. micro- eddy flow deep desulfuration dedusting absorption tower device according to claim 1, which is characterized in that the primary spray dress
At least two layers spray is installed, 1 or 2 layer of spray is arranged in two level spray equipment, and every layer of spray equipment passes through pipeline, circulating pump and slurry
Liquid regenerated reactor be connected, and circulating-pump outlet between spraying layer suction line access desulfurizing agent flow inlet line；The advanced demisting
Device includes flat defogger and the cyclone demister above flat defogger, is set between flat defogger and cyclone demister
Set technique water flushing device.
3. micro- eddy flow deep desulfuration dedusting absorption tower device according to claim 1, which is characterized in that micro- cyclonic absorber
It is 1~5 layer that the number of plies, which is arranged,.
4. micro-cyclone de sulphur absorbs tower apparatus according to claim 1, which is characterized in that the swirl vane of micro- spiral board
Number be 8~24, the blade elevation angle be 30~80 °, blade radial angle be 0~30 °, both ends of the blade respectively with circular cone blind plate outer wall and
Cover cylinder inner wall is connected, and the air inlet and outlet end of blade opens 30~60 ° of chamferings.
5. micro- eddy flow deep desulfuration dedusting absorption tower device according to claim 1, which is characterized in that the cover cylinder internal diameter is
30~200mm, cover cylinder upper end outlet be higher than swirl vane 0~30mm of upper edge, the 5%~30% of a diameter of cover cylinder internal diameter of blind plate.
6. micro- eddy flow deep desulfuration dedusting absorption tower device according to claim 1, which is characterized in that the roof water safety
Mounted in the position for exporting 0~50mm less than cover cylinder, cover cylinder passes through top plate and is connect with top plate, and top plate is square or circle,
Length or a diameter of 600~1500mm, open several drainage holes on the top plate of micro- spiral board surrounding, and the slurry pipe is L
Type slurry pipe；The drainage hole and slurries pipe diameter is 10~20mm, 30~80mm of pipe range.
7. micro- eddy flow deep desulfuration absorbs tower apparatus according to claim 1, which is characterized in that the divider height is 50~
N (N takes 1,2,3) row's deflector holes are uniformly opened at 100mm, the middle part that top plate plant tilting direction is parallel on the partition board, and aperture is 10~
20mm。
8. a kind of micro- eddy flow deep desulfuration dust collecting process, which is characterized in that include the following steps：
(1) flue gas enters absorption tower by smoke inlet, and the drop that primary spray equipment sprays is fallen to above uniformly distributed mass transfer device, quilt
It is lifted across the air-flow of uniformly distributed mass transfer device hole and holds liquid layer to be formed above it, flue gas is after this holds liquid layer by primary
Desulfurization and dedusting washs and flue gas flow field obtains rectification, and flue gas continues to rise inversely to be connect with the drop of primary spray desulfurization nozzle ejection
It touches, flue gas is washed by second of desulfurization and dedusting, SO in the flue gas after second of desulfurization and dedusting washs2Concentration is brought down below
1000mg/Nm3；
(2) accelerate to rotate upwardly through micro- eddy flow sheet separation by the flue gas of primary desulfurization and dedusting, two neighboring micro- spiral board is tight
Two strands of high speed rotation air-flows by side mutually collide, and two level spray is sprayed the drop fallen to above micro- eddy flow module
" tearing up " rises at the smaller drop of grain size, droplet with air-flow, and drop agglomeration falls again, so on circulate to
Strong turbulence region is formed above top plate, flue gas continuously passes through strong turbulence region, and the slurries in strong turbulence region are eventually by drain
Hole is discharged into slurries regenerated reactor along downspout；
(3) flue gas washed through micro- cyclonic absorber turbulent region continues to rise, and is sprayed with two level spray equipment atomizer
High ph-values drop inversely contacts washing, SO in flue gas2It is removed completely, the neat stress after four times washings is in advanced demisting
Under device effect, after removing the droplet in most of flue gas, discharged by chimney breast.
9. micro-cyclone de sulphur dust collecting process according to claim 8, which is characterized in that the primary sprays every layer of spray
Liquid-gas ratio be 3~8L/Nm3, tower reactor slurry pH value is 4.5~6.0；The two level sprays the liquid-gas ratio that every layer sprays
0.1~6L/Nm3, spraying layer inlet slurry pH value is 5.5~7.0.
10. micro-cyclone de sulphur dust collecting process according to claim 8, which is characterized in that micro- cyclonic absorber entrance
SO in flue gas2Concentration is less than 1000mg/Nm3, SO in exiting flue gas2Concentration is less than 35mg/Nm3。
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| CN109107384A (en) * | 2018-10-11 | 2019-01-01 | 江苏三井环保股份有限公司 | A kind of flue-gas dust-removing and desulfurization denitrification integrated device |
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