CN106731630A - A kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon - Google Patents
A kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon Download PDFInfo
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- CN106731630A CN106731630A CN201611207184.4A CN201611207184A CN106731630A CN 106731630 A CN106731630 A CN 106731630A CN 201611207184 A CN201611207184 A CN 201611207184A CN 106731630 A CN106731630 A CN 106731630A
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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
- 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
- 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
- B01D53/002—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 by condensation
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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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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Abstract
A kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon of disclosure, boiler smoke enters in desulfurizing tower, spray liquid with containing including SO into desulfurizing tower2Flue gas sprayed, contacted with the cooling water on packing layer by packing layer again and contacted with washing spraying layer again, the cooling water of packing layer bottom fall into washing drip tray on be back to cooling tower, enter back into washing pool by washing water delivery pump get to wash spraying layer be circulated utilization；System flow is simple, good cooling results, the low advantage of operating cost, and spraying cooling water absorbs the (NH in boiler smoke4)2SO4Particle, SO2、NH3Material, the saturated vapor in boiler smoke is with (NH4)2SO4Particle to form the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4Particle, suppresses the formation of aerosol, ammonia desulfurizing process is discharged the particle concentration in boiler smoke and is less than 30mg/m3。
Description
Technical field
The invention belongs to ammonia type flue gas desulfurizing technical field, and in particular to one kind is economized on water and controlled in ammonia desulfurizing process
The technique of aerosol phenomenon.
Background technology
With social city, technicalization, hommization development, industrial or agricultural obtained vigorous growth, more and more
Sulphur is employed, and the thing followed is the increase of sulphur usage amount and showing for sulfur dioxide problem.Sulfur dioxide（SO2）It is to be formed
The main cause of the environmental problems such as acid rain, haze, is currently to endanger the atmosphere pollution for being only second to pellet.By drawing
The mode such as enter, digest and assimilate, China progressively auxiliary construction desulfurizer, SO on coal-burning boiler2The impetus for polluting aggravation is obtained
Control is arrived.Even so, China SO2Discharge capacity radix is huge, the discharge capacity for still having nearly 20,000,000 tons every year, on the one hand to me
State's atmospheric environment causes considerable damage, on the other hand causes the waste of a large amount of Sulphur ressources.Sulphur is that industrial acid making is with production one
The necessary raw material of row chemical fertilizer, China needs the sulphur of about 10,000,000 tons of import to meet the demand of industrial and agricultural development every year.Ammonia process
Desulfurization is with chemism ammonia higher（NH3）For absorbent absorbs the SO in flue gas2, high with desulfuration efficiency, power consumption is low,
And obtain accessory substance the ammonium sulfate ((NH with use value higher4)2SO4) advantage, administer SO2Realized while pollution
The recycling of Sulphur ressource, has broad application prospects in China.
And with the popularity of humanized concept, and new harmonious society composition, desulfurization is very important, the ammonia process of desulfurization
As popularization and application have progressively been obtained in a kind of green desulfurization technology at home big-and-middle-sized flue-gas desulfurizing engineering, create good
Environmental benefit.Absorption tower is the core cell of the ammonia process of desulfurization, flue gas from absorb tower bottom enter and turn back upwards with spray and under
Slurries counter current contacting, neat stress enters chimney, finally enters air by the escaping pipe at the top of absorption tower.Due to absorbent ammonia tool
There is stronger volatility, and absorption tower top spray layer slurry pH value out is of a relatively high, the ammonia in slurries is flat by gas-liquid
Weighing apparatus enter gas phase, with boiler smoke in do not absorb complete SO2And the reaction generation ammonium sulfate solids particle such as water vapour, separately
Outward ,+6 valency sulphur (the mainly ((NH containing higher concentration in slurries4)2SO4), the drop of flue gas entrainment can also be formed by evaporation
Fine particle, increased the particle concentration in discharge boiler smoke under two collective effects of aspect, be taken off as limitation ammonia process
The major reason of sulphur technology development.What revision in 2012 was implemented《Fossil-fuel power plant atmospheric pollutant emission standard》（GB13223-2011）
The granular material discharged concentration limit of regulation fire coal boiler fume is 30mg/m3, strict requirements are proposed to boiler smoke discharge.Cause
This, the concentration for reducing aerosol in ammonia desulfurizing process boiler smoke is imperative, while being also to realize that the technology is further pushed away
The key of wide application.
Research on ammonia process of desulfurization aerosol control aspect is relatively fewer, and Huang Rong prolongs（Journal of Chemical Industry and Engineering, 2015,66
（11）：4366~4372）Ammonia process of desulfurization aerosol particle mainly submicron particles are pointed out in research.Bao Jing waits quietly（Power work
Journey, 2009,29（2）:178~183）Study to steam is passed through in flue gas, using the principle of steam phase transforming, realize that fine grained condenses
Grow up removing, so as to reach the purpose of degassing sol.Proposed the slurry in absorption tower in Chinese patent CN2013102020522
Liquid pump squeezes into cooling system so that the temperature of slurries is reduced to 10 ~ 32 DEG C, the spray then squeezed at the top of absorption tower with pump again
Layer, reduces flue-gas temperature, whole tower is run under 20 ~ 40 DEG C of low temperature environment, and then reduces the decomposition of ammonium sulfite, while
Fine grained in flue gas is absorbed by the condensation of water vapour.
Bao Jingjing（Power engineering, 2009,29（2）:178~183）The method using steam phase transforming of proposition removes ammonia process
, there is vapour system complexity, pipeline heat insulation in the fine grained in desulfuration boiler flue gas.Chinese patent
Slurries pumped in absorption tower is squeezed into spray column by CN2013102020522 propositions again after lowering the temperature in cooling device
There is system complex, take up an area the deficiencies such as big and energy consumption is high in the spraying layer at top, the method.Therefore, research and develop a kind of simple, high
Efficiency, the ammonia process of desulfurization flue gas aerosol removal technology of low cost have important engineering application value.
The content of the invention
The technical problem of solution：The application provides a kind of work economized on water in ammonia desulfurizing process and control aerosol phenomenon
Skill, the equipment solved in existing ammonia desulfurizing process is complicated, and desulfuration efficiency is low, high cost, the technical problem such as floor space is big, from
And reducing the concentration of particulate matter in ammonia process of desulfurization discharge boiler smoke, it is ensured that the ammonia process of desulfurization this green desulfurization technology disclosure satisfy that
Current environmental requirement.
Technical scheme：A kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：120 ~ 150 DEG C of boiler smokes enter in desulfurizing tower from the smoke inlet of desulfurizing tower side, and flue gas is provided with desulfurizing tower
Cooling concentration and sulfur dioxide uptake zone, slurries spraying layer, institute are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
State slurries spraying layer and be divided into spraying layer and lower spraying layer, spray liquid includes SO with into desulfurizing tower2Flue gas sprayed, spray
Drench liquid to use concentration is the ammonium sulfate/ammonium sulfite solution of 5-35%m/m, the SO of the 95%-99% in flue gas2It is dense in flue gas cool-down
Contracting and sulfur dioxide uptake zone are captured, while the flue-gas temperature after spray is at 50-60 DEG C；
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption passes through
Washing drip tray, boiler smoke is uniformly distributed and enters water wash zone, and packing layer is provided with above washing drip tray, and 2m sets on packing layer
One layer of washing spraying layer, through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone upwardly through packing layer,
Then boiler smoke continues up the drop counter current contacting sprayed with washing spraying layer atomization, and temperature drops to 40 DEG C from 50 DEG C；
3rd step：The cooling water of packing layer bottom outflow is fallen into washing drip tray, and cooling tower is back under gravity,
Cooling tower drops to 25-30 DEG C through the washing coolant-temperature gage after supercooling by entering washing pool after natural cooling from 35-40 DEG C, cold
But the washing water after gets to washing spraying layer and is circulated utilization by washing water delivery pump again, by cooling, can be by boiler
Flue gas drops to 35-40 DEG C, and the boiler smoke after cooling is by neat stress smoke stack emission to air.
As a kind of optimal technical scheme of the application：Cooling water and boiler that the second step reclaimed water washing and spraying layer sprays
The flow-rate ratio of flue gas is 0.5-4L/m3；
As a kind of optimal technical scheme of the application：0.4 ~ 1.2m of bed stuffing height in the second step, washing drip tray away from
From packing layer down cross-sectional 0.8-1.2m.
As a kind of optimal technical scheme of the application：Described filler layer is plate ripple arranged packing layer, filler floor height
0.6m, apart from packing layer down cross-sectional 0.6-0.8m, packing layer material is polypropylene to washing drip tray.
As a kind of optimal technical scheme of the application：The desulfurizing tower uses whole glass steel material, 316L stainless steels
The lining glass flake anti-corrosion material manufacture of material, polypropylene plastics or carbon steel, and equipped with support beam.
Beneficial effect：
1. cooling treatment is carried out to the boiler smoke of the ammonia process of desulfurization using the mode of spray droplet and the joint cooling of packing layer liquid film,
With system flow is simple, good cooling results, the low advantage of operating cost.
2. (the NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3Material, and boiler smoke
In saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Particle, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3,
Ammonia process of desulfurization aerosol can effectively be solved the problems, such as.
Brief description of the drawings
Fig. 1 is device of the invention and process flow diagram.
Description of reference numerals：1st, desulfurizing tower, 2, smoke inlet, 3, upper spraying layer, 4, lower spraying layer, 5, washing drip tray, 6,
Packing layer, 7, washing spraying layer, 8, cooling tower, 9, washing pool, 10, washing water delivery pump, 11, neat stress chimney.
Specific embodiment
The specific embodiment of the application is described in further detail with reference to Figure of description.
Embodiment 1：
As shown in figure 1, a kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：120 DEG C of boiler smokes enter in desulfurizing tower 1 from the smoke inlet 2 of the side of desulfurizing tower 1, and flue gas is provided with desulfurizing tower 1
Cooling concentration and sulfur dioxide uptake zone, slurries spraying layer, institute are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
State slurries spraying layer and be divided into spraying layer 3 and lower spraying layer 4, spray liquid includes SO with into desulfurizing tower2Flue gas sprayed,
It is the ammonium sulfate/ammonium sulfite solution of 5%m/m that spray liquid uses concentration, the SO of 95% in flue gas2In flue gas cool-down concentration and two
Absorption of sulfur oxides area is captured, while the flue-gas temperature after spray is at 50 DEG C.
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption
By washing drip tray 5, boiler smoke is uniformly distributed and enters water wash zone, and packing layer is provided with washing drip tray 5 top 0.8m
6, the height of packing layer 6 is 0.4m, and 2m sets one layer of washing spraying layer 7, cooling water and pot that washing spraying layer 7 sprays on packing layer 6
The flow-rate ratio of kiln gas is 0.5L/m3, lead to upwards through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone
Packing layer 6 is crossed, is fully contacted with cooling water liquid film of the spray on packing layer and is tentatively lowered the temperature；Then boiler smoke continue to
The upper drop counter current contacting sprayed with the washing atomization of spraying layer 7, atomized drop has larger specific surface area, drop and boiler smoke
Gas passes through heat transfer so as to reach the purpose of further cooling during contacting, on the one hand, boiler smoke is sequentially passed through to be filled out
The bed of material and cool water shower area, temperature drop to 40 DEG C from 50 DEG C, the saturated vapor in temperature-fall period in boiler smoke with
(NH4)2SO4Particle to form water droplet for the nuclei of condensation condense, so as to realize (NH4)2SO4The trapping of particle；On the other hand, boiler smoke
In (NH4)2SO4Particle, SO2、NH3Material dissolves during being contacted with spraying cooling water and enters liquid phase, it is suppressed that gas is molten
The formation of glue, while enhancing (NH4)2SO4The arresting efficiency of particle；Cooled down using spray droplet and packing layer liquid film joint
Mode carries out cooling treatment to the boiler smoke of the ammonia process of desulfurization, with system flow is simple, good cooling results, operating cost it is low
Advantage.
3rd step：The cooling water of the bottom of packing layer 6 outflow is fallen into washing drip tray 5, is back under gravity cool
Water tower 8, in cooling tower 8 by entering washing pool 9 after natural cooling, 25 is dropped to through the washing coolant-temperature gage after supercooling from 35 DEG C
DEG C, the washing water after cooling gets to washing spraying layer 7 and is circulated utilization by washing water delivery pump 10 again, by cooling, can
35 DEG C are dropped to by boiler smoke, the boiler smoke after cooling is discharged into air by neat stress chimney 11, the desulfurizing tower 1 is adopted
Glass flake anti-corrosion material is served as a contrast with whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel to manufacture, and be furnished with
Support beam.
(NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3In material, and boiler smoke
Saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Grain, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3, can
Effectively solve the problems, such as ammonia process of desulfurization aerosol.
Embodiment 2：
As shown in figure 1, a kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：130 DEG C of boiler smokes enter in desulfurizing tower 1 from the smoke inlet 2 of the side of desulfurizing tower 1, and cigarette is provided with desulfurizing tower 1
Gas cooling concentration and sulfur dioxide uptake zone, slurries spraying layer is provided with the flue gas cool-down concentration and sulfur dioxide uptake zone,
The slurries spraying layer is divided into spraying layer 3 and lower spraying layer 4, and spray liquid includes SO with into desulfurizing tower2Flue gas sprayed
Drench, it is the ammonium sulfate/ammonium sulfite solution of 35%m/m that spray liquid uses concentration, the SO of 99% in flue gas2In flue gas cool-down concentration
It is captured with sulfur dioxide uptake zone, while the flue-gas temperature after spray is at 60 DEG C.
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption
By washing drip tray 5, boiler smoke is uniformly distributed and enters water wash zone, and packing layer is provided with washing drip tray 5 top 1.2m
6, the height of packing layer 6 is 1.2m, and 2m sets one layer of washing spraying layer 7, cooling water and pot that washing spraying layer 7 sprays on packing layer 6
The flow-rate ratio of kiln gas is 4L/m3, through flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone after boiler smoke upwardly through
Packing layer 6, is fully contacted with cooling water liquid film of the spray on packing layer and is tentatively lowered the temperature；Then boiler smoke is continued up
The drop counter current contacting sprayed with the washing atomization of spraying layer 7, atomized drop has larger specific surface area, drop and boiler smoke
By heat transfer so as to reach the further purpose lowered the temperature during contact, on the one hand, boiler smoke sequentially passes through filler
Floor and cool water shower area, temperature drop to 40 DEG C from 50 DEG C, and the saturated vapor in temperature-fall period in boiler smoke is with (NH4)2SO4Particle to form water droplet for the nuclei of condensation condense, so as to realize (NH4)2SO4The trapping of particle；On the other hand, in boiler smoke
(NH4)2SO4Particle, SO2、NH3Material dissolves during being contacted with spraying cooling water and enters liquid phase, it is suppressed that aerosol
Formed, while enhancing (NH4)2SO4The arresting efficiency of particle；Using spray droplet and the mode of packing layer liquid film joint cooling
Boiler smoke to the ammonia process of desulfurization carries out cooling treatment, with system flow is simple, good cooling results, operating cost it is low excellent
Point.
3rd step：The cooling water of the bottom of packing layer 6 outflow is fallen into washing drip tray 5, is back under gravity cool
Water tower 8, in cooling tower 8 by entering washing pool 9 after natural cooling, 30 is dropped to through the washing coolant-temperature gage after supercooling from 40 DEG C
DEG C, the washing water after cooling gets to washing spraying layer 7 and is circulated utilization by washing water delivery pump 10 again, by cooling, can
40 DEG C are dropped to by boiler smoke, the boiler smoke after cooling is discharged into air by neat stress chimney 11, the desulfurizing tower 1 is adopted
Glass flake anti-corrosion material is served as a contrast with whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel to manufacture, and be furnished with
Support beam.
(NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3In material, and boiler smoke
Saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Grain, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3, can
Effectively solve the problems, such as ammonia process of desulfurization aerosol.
Embodiment 3：
As shown in figure 1, a kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：140 DEG C of boiler smokes enter in desulfurizing tower 1 from the smoke inlet 2 of the side of desulfurizing tower 1, and flue gas is provided with desulfurizing tower 1
Cooling concentration and sulfur dioxide uptake zone, slurries spraying layer, institute are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
State slurries spraying layer and be divided into spraying layer 3 and lower spraying layer 4, spray liquid includes SO with into desulfurizing tower2Flue gas sprayed,
It is the ammonium sulfate/ammonium sulfite solution of 10%m/m that spray liquid uses concentration, the SO of 96% in flue gas2Flue gas cool-down concentration and
Sulfur dioxide uptake zone is captured, while the flue-gas temperature after spray is at 52 DEG C.
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption
By washing drip tray 5, boiler smoke is uniformly distributed and enters water wash zone, and packing layer 6 is provided with the top 0.9 of washing drip tray 5,
The height of packing layer 6 is 0.6m, and 2m sets one layer of washing spraying layer 7, cooling water and boiler that washing spraying layer 7 sprays on packing layer 6
The flow-rate ratio of flue gas is 1L/m3, through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone upwardly through filling out
The bed of material 6, is fully contacted with cooling water liquid film of the spray on packing layer and is tentatively lowered the temperature；Then boiler smoke continue up with
The drop counter current contacting that the washing atomization of spraying layer 7 sprays, atomized drop has larger specific surface area, and drop connects with boiler smoke
By heat transfer so as to reach the further purpose lowered the temperature in tactile process, on the one hand, boiler smoke sequentially passes through packing layer
With cool water shower area, temperature drops to 40 DEG C from 50 DEG C, and the saturated vapor in temperature-fall period in boiler smoke is with (NH4)2SO4Particle to form water droplet for the nuclei of condensation condense, so as to realize (NH4)2SO4The trapping of particle；On the other hand, in boiler smoke
(NH4)2SO4Particle, SO2、NH3Material dissolves during being contacted with spraying cooling water and enters liquid phase, it is suppressed that aerosol
Formed, while enhancing (NH4)2SO4The arresting efficiency of particle；Using spray droplet and the mode of packing layer liquid film joint cooling
Boiler smoke to the ammonia process of desulfurization carries out cooling treatment, with system flow is simple, good cooling results, operating cost it is low excellent
Point.
3rd step：The cooling water of the bottom of packing layer 6 outflow is fallen into washing drip tray 5, is back under gravity cool
Water tower 8, in cooling tower 8 by entering washing pool 9 after natural cooling, 26 is dropped to through the washing coolant-temperature gage after supercooling from 36 DEG C
DEG C, the washing water after cooling gets to washing spraying layer 7 and is circulated utilization by washing water delivery pump 10 again, by cooling, can
36 DEG C are dropped to by boiler smoke, the boiler smoke after cooling is discharged into air by neat stress chimney 11, the desulfurizing tower 1 is adopted
Glass flake anti-corrosion material is served as a contrast with whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel to manufacture, and be furnished with
Support beam.
(NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3In material, and boiler smoke
Saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Grain, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3, can
Effectively solve the problems, such as ammonia process of desulfurization aerosol.
Embodiment 4：
As shown in figure 1, a kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：145 DEG C of boiler smokes enter in desulfurizing tower 1 from the smoke inlet 2 of the side of desulfurizing tower 1, and flue gas is provided with desulfurizing tower 1
Cooling concentration and sulfur dioxide uptake zone, slurries spraying layer, institute are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
State slurries spraying layer and be divided into spraying layer 3 and lower spraying layer 4, spray liquid includes SO with into desulfurizing tower2Flue gas sprayed,
It is the ammonium sulfate/ammonium sulfite solution of 30%m/m that spray liquid uses concentration, the SO of 98% in flue gas2Flue gas cool-down concentration and
Sulfur dioxide uptake zone is captured, while the flue-gas temperature after spray is at 58 DEG C.
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption
By washing drip tray 5, boiler smoke is uniformly distributed and enters water wash zone, and packing layer is provided with washing drip tray 5 top 1.1m
6, the height of packing layer 6 is 1m, and 2m sets one layer of washing spraying layer 7, cooling water and boiler that washing spraying layer 7 sprays on packing layer 6
The flow-rate ratio of flue gas is 3L/m3, through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone upwardly through filling out
The bed of material 6, is fully contacted with cooling water liquid film of the spray on packing layer and is tentatively lowered the temperature；Then boiler smoke continue up with
The drop counter current contacting that the washing atomization of spraying layer 7 sprays, atomized drop has larger specific surface area, and drop connects with boiler smoke
By heat transfer so as to reach the further purpose lowered the temperature in tactile process, on the one hand, boiler smoke sequentially passes through packing layer
With cool water shower area, temperature drops to 40 DEG C from 50 DEG C, and the saturated vapor in temperature-fall period in boiler smoke is with (NH4)2SO4Particle to form water droplet for the nuclei of condensation condense, so as to realize (NH4)2SO4The trapping of particle；On the other hand, in boiler smoke
(NH4)2SO4Particle, SO2、NH3Material dissolves during being contacted with spraying cooling water and enters liquid phase, it is suppressed that aerosol
Formed, while enhancing (NH4)2SO4The arresting efficiency of particle；Using spray droplet and the mode of packing layer liquid film joint cooling
Boiler smoke to the ammonia process of desulfurization carries out cooling treatment, with system flow is simple, good cooling results, operating cost it is low excellent
Point.
3rd step：The cooling water of the bottom of packing layer 6 outflow is fallen into washing drip tray 5, is back under gravity cool
Water tower 8, in cooling tower 8 by entering washing pool 9 after natural cooling, 28 is dropped to through the washing coolant-temperature gage after supercooling from 38 DEG C
DEG C, the washing water after cooling gets to washing spraying layer 7 and is circulated utilization by washing water delivery pump 10 again, by cooling, can
38 DEG C are dropped to by boiler smoke, the boiler smoke after cooling is discharged into air by neat stress chimney 11, the desulfurizing tower 1 is adopted
Glass flake anti-corrosion material is served as a contrast with whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel to manufacture, and be furnished with
Support beam.
(NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3In material, and boiler smoke
Saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Grain, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3, can
Effectively solve the problems, such as ammonia process of desulfurization aerosol.
Embodiment 5：
As shown in figure 1, a kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon, comprises the following steps：
The first step：150 DEG C of boiler smokes enter in desulfurizing tower 1 from the smoke inlet 2 of the side of desulfurizing tower 1, and flue gas is provided with desulfurizing tower 1
Cooling concentration and sulfur dioxide uptake zone, slurries spraying layer, institute are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
State slurries spraying layer and be divided into spraying layer 3 and lower spraying layer 4, spray liquid includes SO with into desulfurizing tower2Flue gas sprayed,
It is the ammonium sulfate/ammonium sulfite solution of 20%m/m that spray liquid uses concentration, the SO of 99% in flue gas2Flue gas cool-down concentration and
Sulfur dioxide uptake zone is captured, while the flue-gas temperature after spray is at 50 DEG C.
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption
By washing drip tray 5, boiler smoke is uniformly distributed and enters water wash zone, and packing layer 6 is provided with washing drip tray 5 top 1m,
The height of packing layer 6 is 0.8m, and 2m sets one layer of washing spraying layer 7, cooling water and boiler that washing spraying layer 7 sprays on packing layer 6
The flow-rate ratio of flue gas is 2L/m3, through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone upwardly through filling out
The bed of material 6, is fully contacted with cooling water liquid film of the spray on packing layer and is tentatively lowered the temperature；Then boiler smoke continue up with
The drop counter current contacting that the washing atomization of spraying layer 7 sprays, atomized drop has larger specific surface area, and drop connects with boiler smoke
By heat transfer so as to reach the further purpose lowered the temperature in tactile process, on the one hand, boiler smoke sequentially passes through packing layer
With cool water shower area, temperature drops to 40 DEG C from 50 DEG C, and the saturated vapor in temperature-fall period in boiler smoke is with (NH4)2SO4Particle to form water droplet for the nuclei of condensation condense, so as to realize (NH4)2SO4The trapping of particle；On the other hand, in boiler smoke
(NH4)2SO4Particle, SO2、NH3Material dissolves during being contacted with spraying cooling water and enters liquid phase, it is suppressed that aerosol
Formed, while enhancing (NH4)2SO4The arresting efficiency of particle；Using spray droplet and the mode of packing layer liquid film joint cooling
Boiler smoke to the ammonia process of desulfurization carries out cooling treatment, with system flow is simple, good cooling results, operating cost it is low excellent
Point.
3rd step：The cooling water of the bottom of packing layer 6 outflow is fallen into washing drip tray 5, is back under gravity cool
Water tower 8, in cooling tower 8 by entering washing pool 9 after natural cooling, 25 is dropped to through the washing coolant-temperature gage after supercooling from 40 DEG C
DEG C, the washing water after cooling gets to washing spraying layer 7 and is circulated utilization by washing water delivery pump 10 again, by cooling, can
35 DEG C are dropped to by boiler smoke, the boiler smoke after cooling is discharged into air by neat stress chimney 11, the desulfurizing tower 1 is adopted
Glass flake anti-corrosion material is served as a contrast with whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel to manufacture, and be furnished with
Support beam.
(NH in boiler smoke is absorbed by spraying cooling water4)2SO4Particle, SO2、NH3In material, and boiler smoke
Saturated vapor with (NH4)2SO4Particle to form two approach of the water droplet, (NH in trapping boiler smoke for core condenses4)2SO4
Grain, suppresses the formation of aerosol, ammonia desulfurizing process can be made to discharge the particle concentration in boiler smoke and be less than 30mg/m3, can
Effectively solve the problems, such as ammonia process of desulfurization aerosol.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Presently filed embodiment is explained in detail above in conjunction with accompanying drawing, but the application is not limited to above-mentioned embodiment party
Formula, in the ken that those of ordinary skill in the art possess, can also do on the premise of the application objective is not departed from
Go out various change.
Claims (5)
1. it is a kind of in ammonia desulfurizing process economize on water and control aerosol phenomenon technique, it is characterised in that comprise the following steps：
The first step：120 ~ 150 DEG C of boiler smokes are from desulfurizing tower（1）The smoke inlet of side（2）Into desulfurizing tower（1）It is interior, desulfurizing tower
（1）Flue gas cool-down concentration and sulfur dioxide uptake zone are inside provided with, are provided with the flue gas cool-down concentration and sulfur dioxide uptake zone
Slurries spraying layer, the slurries spraying layer is divided into spraying layer（3）With lower spraying layer（4）, spray liquid with include into desulfurizing tower
SO2Flue gas sprayed, it is the ammonium sulfate/ammonium sulfite solution of 5-35%m/m, the 95%- in flue gas that spray liquid uses concentration
99% SO2It is captured in flue gas cool-down concentration and sulfur dioxide uptake zone, while the flue-gas temperature after spray is in 50-60
℃；
Second step：Water wash zone is set above flue gas cool-down concentration and sulfur dioxide uptake zone, the boiler smoke after absorption passes through
Washing drip tray（5）, boiler smoke is uniformly distributed and enters water wash zone, in washing drip tray（5）Top is provided with packing layer（6）, fill out
The bed of material（6）Upper 2m sets one layer of washing spraying layer (7), through the boiler smoke after flue gas cool-down concentration and the desulfurization of sulfur dioxide uptake zone
Upwardly through packing layer（6）, then boiler smoke continue up and wash spraying layer (7) atomization spray drop counter current contacting,
Temperature drops to 40 DEG C from 50 DEG C；
3rd step：Packing layer（6）The cooling water of bottom outflow falls into washing drip tray（5）On, it is back under gravity cool
Water tower（8）, in cooling tower（8）By entering washing pool after natural cooling（9）, through the washing coolant-temperature gage after supercooling from 35-40
DEG C 25-30 DEG C is dropped to, the washing water after cooling passes through washing water delivery pump again（10）Get to washing spraying layer（7）It is circulated profit
With, by cooling, boiler smoke can be dropped to 35-40 DEG C, the boiler smoke after cooling passes through neat stress chimney（11）Discharge
To air.
2. the technique economized on water in ammonia desulfurizing process and control aerosol phenomenon according to claim 1, its feature exists
In：The second step reclaimed water washing and spraying layer（7）The cooling water of ejection is 0.5-4L/m with the flow-rate ratio of boiler smoke3。
3. the technique economized on water in ammonia desulfurizing process and control aerosol phenomenon according to claim 1, its feature exists
In：Packing layer in the second step（6）Highly 0.4 ~ 1.2m, washes drip tray（5）Apart from packing layer（6）Down cross-sectional 0.8-
1.2m。
4. the technique economized on water in ammonia desulfurizing process and control aerosol phenomenon according to claim 3, its feature exists
In：Described filler layer（6）It is plate ripple arranged packing layer, packing layer（6）0.6m high, washes drip tray（5）Apart from packing layer（6）
Down cross-sectional 0.8m, packing layer material is polypropylene.
5. the technique economized on water in ammonia desulfurizing process and control aerosol phenomenon according to claim 1, its feature exists
In：The desulfurizing tower（1）Glass flake is served as a contrast using whole glass steel material, 316L stainless steels, polypropylene plastics or carbon steel
Anti-corrosion material is manufactured, and equipped with support beam.
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| CN201611207184.4A CN106731630A (en) | 2016-12-23 | 2016-12-23 | A kind of technique economized on water in ammonia desulfurizing process and control aerosol phenomenon |
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| CN107261699A (en) * | 2017-06-15 | 2017-10-20 | 上海交通大学 | A kind of apparatus and method of the ultra-clean dedusting eliminating white smoke of desulfurization fume |
| CN107433118A (en) * | 2017-07-21 | 2017-12-05 | 上海交通大学 | A kind of system and method for desulfurization fume eliminating white smoke |
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