CN106925096A - A kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system - Google Patents
A kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system Download PDFInfo
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- CN106925096A CN106925096A CN201710194223.XA CN201710194223A CN106925096A CN 106925096 A CN106925096 A CN 106925096A CN 201710194223 A CN201710194223 A CN 201710194223A CN 106925096 A CN106925096 A CN 106925096A
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- absorption tower
- grade
- dust
- sulfur dioxide
- waste water
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000002351 wastewater Substances 0.000 title claims abstract description 60
- 239000000428 dust Substances 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 title claims abstract description 20
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 159
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 239000002250 absorbent Substances 0.000 claims abstract description 24
- 230000002745 absorbent Effects 0.000 claims abstract description 24
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000009102 absorption Effects 0.000 claims 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 55
- 239000003546 flue gas Substances 0.000 abstract description 55
- 238000000034 method Methods 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 230000023556 desulfurization Effects 0.000 description 11
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 8
- 235000019504 cigarettes Nutrition 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 239000000920 calcium hydroxide Substances 0.000 description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 6
- 235000011116 calcium hydroxide Nutrition 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052602 gypsum Inorganic materials 0.000 description 6
- 239000010440 gypsum Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 description 5
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- TULNMGUIOFTZCL-UHFFFAOYSA-L [OH-].[Ca+2].F.[OH-] Chemical compound [OH-].[Ca+2].F.[OH-] TULNMGUIOFTZCL-UHFFFAOYSA-L 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D47/10—Venturi scrubbers
-
- 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
-
- 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
-
- 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
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system, belong to coal steam-electric plant smoke processing technology field.First grade absorption tower (1) side in system is provided with humidification water inlet (15) and first order absorption agent entrance (16), humidification water inlet (15) is connected through pipeline with wastewater collection tank (8), and first order absorption agent entrance (16) is connected through pipeline with first grade desulfurizing agent feed bin (9).First grade absorption tower (1) top is sequentially connected through flue with deduster (4), two-level absorption tower (6), chimney (11), two-level absorption tower (6) middle part is connected through pipeline with two grades of absorbent slurry casees (7), and two-level absorption tower (6) bottom connects wastewater collection tank (8) through pipeline.The sulfur removal technology that the system is combined using semidry method wet method, solves the problems, such as flue gas desulphurization, dedusting and discharge of wastewater, simple structure, reduces energy consumption and operating cost.
Description
Technical field
The present invention relates to a kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system, belong to thermal power plant's cigarette
Gas disposal technical field.
Background technology
At present for the control of sulfur dioxide in coal steam-electric plant smoke, more using the string tower technology in wet desulphurization；For powder
Dirt discharge is more using low temperature dedusting technology reduction cigarette temperature, improves deduster technology.From the point of view of operational effect, although reached super
The purpose of net discharge, but also there are problems that in the process of running following：
1) Wet Flue Gas Desulfurization Technique has that operation energy consumption is high, complex process, and desulfurization adjustment means are single, especially wet desulphurization
During produce a large amount of desulfurization wastewaters, desulfurization wastewater treatment has that big difficulty, complex process, operating cost are high, waste water
Cannot effectively discharge and cause desulphurization system slurries to deteriorate, have a strong impact on system and normally run.
2) low low-temperature heat exchange dedusting technology improves electrostatic precipitation efficiency, meets emission request, but currently used
Low cryogenic heat exchanger heat exchange efficiency is low, easy blocking is worn and torn, and energy source secondary utilization rate is low.
3) power plant produces a large amount of waste water, and processing cost is high, complex treatment process and cannot realize wastewater zero discharge.
4) sulfur trioxide in flue gas, hydrogen chloride, hydrogen fluoride extrusion rate it is relatively low.
The content of the invention
It is an object of the present invention to provide a kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system.Should
The two-step desulfurization technique that system is combined using semidry method-wet method, solves flue gas desulphurization, dedusting and discharge of wastewater
Problem, process is simple, technically reliable, small investment, operating cost and energy consumption are relatively low.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：
This kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system include first grade absorption tower, deduster, two
Level absorption tower, two grades of absorbent slurry casees, wastewater collection tank, first grade desulfurizing agent feed bin and chimneys.The system uses double tower two-stage
Absorption technique, the first grade absorption tower is half-dried desulfurizing tower, and first grade absorption tower is arranged between boiler air preheater and deduster, one
Level absorption tower side is provided with humidification water inlet and first order absorption agent entrance, and humidification water inlet is connected through pipeline with wastewater collection tank,
First order absorption agent entrance is connected through pipeline with first grade desulfurizing agent feed bin.First grade desulfurizing agent feed bin stores first order absorption agent hydrated lime in powder
Delivered into inside first grade absorption tower through first order absorption agent entrance by fluidized wind.The first grade absorption tower top exit is through flue
It is sequentially connected with deduster, two-level absorption tower, chimney, before first grade absorption tower is arranged on deduster, two-level absorption tower is arranged on and removes
After dirt device.The two-level absorption tower is wet desulphurization tower, and two-level absorption tower middle part is connected through pipeline with two grades of absorbent slurry casees,
For two-level absorption tower is continuously replenished fresh lime stone slurry.After flue gas enters two-level absorption tower, flue gas and two-level absorption tower
Interior slurries react, so that sulfur dioxide in flue gas further absorbs.Two-level absorption tower bottom is useless through pipeline connection
Water collecting tank, waste water in wastewater collection tank is by humidifying water inlet into being used as humidification water inside first grade absorption tower.Due to one
Level sprays into humidification water in absorption tower so that flue-gas temperature is greatly lowered, and the flue gas after cooling enters deduster, substantially increases
The efficiency of dust collection of deduster.The humidification water that first grade absorption tower is sprayed into mainly is produced using two-level absorption tower wet desulphurization or power plant
Waste water, realize wastewater zero discharge.The complete first order absorption agent white lime of product and unreacted in first grade absorption tower and remove
Solid particle in dirt device etc. is fallen into ash bucket.
In order to further improve the utilization rate of absorbent, foregoing system is additionally provided with skewed slot, and the deduster bottom is through oblique
Groove connects the first order absorption agent entrance of first grade absorption tower.Inhaled from one-level by the flue gas that a large amount of solid particles are carried after first grade desulfurizing
Receive top of tower and be discharged into deduster.Flue gas and flying dust are separated in deduster, the particle and desulfurizing agent separated
The absorbent of feed bin supplement is looped back by skewed slot participate in desulphurization reaction in first grade absorption tower again together so that solid particle is repeatedly
Up to a hundred times of circulation.
Foregoing first order absorption tower bottom is additionally provided with Venturi, and boiler air preheater connects Venturi through flue.
The flue gas come from boiler air preheater is uniformly distributed and speed quickening after flowing through Venturi, herein with the first order absorption agent for adding
Powder and circulation flying dust are sufficiently mixed, and severe friction between particle, between gas and particle forms fluid bed.
The humidification water porch of foregoing first grade absorption tower is provided with swivel nozzle, and swivel nozzle is sprayed into and comes from wastewater collection tank
Waste water as humidification water, humidification water forms spraying and reduces cigarette temperature.Under cryogenic, first order absorption agent is further activated, and
With the sulfur dioxide in flue gas in first grade absorption tower hybrid reaction, complete sulfur dioxide absorption.
Air-introduced machine is additionally provided with pipeline between foregoing deduster and two-level absorption tower, the cigarette after deduster dedusting
Gas enters two-level absorption tower desulfurization after being boosted through air-introduced machine.
Demister is additionally provided between foregoing two-level absorption tower and chimney, the demister is placed in two-level absorption tower top,
For flue gas demisting, the flue gas after purification enters chimney by demister by flue.
The foregoing system is additionally provided with vacuum belt machine, and the two-level absorption tower bottom is also by pipeline communication in vacuum skin
Band machine.Slurries, when the concentration of slurry in absorption tower is raised, are got to vacuum skin by slurries and smoke reaction in two-level absorption tower
Band machine carries out gypsum dehydration, and two-grade desulfurizing product is post-processed.
Foregoing deduster can be single electrostatic precipitator, or single electrostatic fabric filter, or
The combination of electrostatic precipitator and electrostatic fabric filter.
Absorbent inside foregoing first grade desulfurizing agent feed bin is white lime, the suction inside two grades of absorbent slurry casees
Receipts agent is lime stone slurry.Absorbent into first grade absorption tower mixes with the sulfur dioxide in flue gas and reacts generation CaSO3
And CaSO4, complete the absorption of sulfur dioxide；Simultaneously because white lime activity is higher, other sour gas such as three oxygen in flue gas
Change sulphur, hydrogen chloride, hydrogen fluoride also with calcium hydroxide reaction, complete absorb.After flue gas and absorbent enter two-level absorption tower, cigarette
Sulfur dioxide and lime stone slurry reaction generation gypsum, further absorb the sulfur dioxide in flue gas in gas.
Compared with prior art, the present invention is advantageous in that：
1) process system need not additionally increase equipment, using the original cleaner of system, by first grade absorption tower
Supplementary humidification water reduction flue-gas temperature, greatly reduces the ratio resistance of dust, original dust collector efficiency is improve, so as to reach powder
The purpose of the ultra-clean discharge of dirt.
2) first grade absorption tower is ensureing sulfur dioxide desulfurization effect using activity calcium hydroxide higher as first grade desulfurizing agent
While rate, moreover it is possible to ensure the extrusion rate to sulfur trioxide, hydrogen chloride, hydrogen fluoride in flue gas, removal efficiency is up to 95%, is much larger than
Single Wet Flue Gas Desulfurization Technique；Desulfuration efficiency wet desulfurizing process higher is set in afterbody simultaneously, it is ensured that whole desulphurization system
Qualified discharge.
3) system has not only reached control sulfur dioxide, the purpose of the ultra-clean discharge of dust concentration, in addition first grade absorption tower
The waste water that humidification water is produced using two-level absorption tower desulfurization or power plant's main frame, reduces desulphurization system water consume, and power plant is produced
Waste water reused, realize waste Water Zero Discharge for Power Plant.
4) system architecture and technological process are fairly simple, technically reliable, small investment.It is combined using semidry method-wet method
Sulfur removal technology reduce the energy consumption that the double tower that commonly uses circulates wet desulfurizing process, save operating cost.
5) setting of first grade absorption tower swivel nozzle avoids fouling, the clogging caused using plain nozzle.
6) first grade absorption tower product is CaSO3、CaSO4The absorbent calcium hydroxide complete with unreacted, is suitable as abandoned mine well and returns
Fill out, road basis etc.；Two-level absorption tower product is that the accessory substance that gypsum, the i.e. system are produced is in dry powdered form, is produced without waste water,
Realize wastewater zero discharge.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
The implication of reference：1- first grade absorption towers, 2- Venturis, 3- swivel nozzles, 4- dedusters, 5- air inducing
Machine, 6- two-level absorption towers, bis- grades of absorbent slurry casees of 7-, 8- wastewater collection tanks, 9- first grade desulfurizing agent feed bins, 10- boilers are empty pre-
Device, 11- chimneys, 12- skewed slots, 13- demisters, 14- vacuum belt machines, 15- humidification water inlets, 16- first order absorption agent entrances.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
Embodiments of the invention 1：As shown in figure 1, this kind of sulfur dioxide, dust and waste water coprocessing system include one-level
Absorption tower 1, deduster 4,6, two grades of absorbent slurry casees 7 of two-level absorption tower, wastewater collection tank 8, first grade desulfurizing agent feed bin 9 and cigarette
Chimney 11.First grade absorption tower 1 is half-dried desulfurizing tower, the top exit of first grade absorption tower 1 through flue and deduster 4, two-level absorption tower 6,
Chimney 11 is sequentially connected.Venturi 2 is additionally provided with the bottom of first grade absorption tower 1, boiler air preheater 10 connects literary mound through flue
In device 2.The side of first grade absorption tower 1 is provided with humidification water inlet 15 and first order absorption agent entrance 16.The humidification water of first grade absorption tower 1
Swivel nozzle 3 is provided with entrance 15, swivel nozzle 3 sprays into the waste water from wastewater collection tank 8 as humidification water；First order absorption agent
Entrance 16 is connected with first grade desulfurizing agent feed bin 9, and the absorbent inside first grade desulfurizing agent feed bin 9 is white lime.Two-level absorption tower 6 is
Wet desulfuration tower, the entrance of two-level absorption tower 6 is connected with deduster 4, and two-level absorption tower 6 is exported and is connected with chimney 11 through flue.
The top of two-level absorption tower 6 also sets up demister 13, and the middle part of two-level absorption tower 6 is connected through pipeline with two grades of absorbent slurry casees 7, and two
The level bottom of absorption tower 6 is connected through pipeline with vacuum belt machine 14.The wastewater collection that the desulfurization of two-level absorption tower 6 is produced is received to waste water
Collection tank 8, wastewater collection tank 8 also connects the humidification water inlet 15 of first grade absorption tower 1 through pipeline, and the waste water in collecting tank is by humidification
Water inlet 15 enters inside first grade absorption tower 1 as humidification water.
120~170 DEG C are generally from the flue-gas temperature of boiler air preheater 10, entering one-level by Venturi 2 inhales
Receive tower 1.Flue gas is accelerated by speed after Venturi 2 so that absorbent, circulating ash are subject to the percussion of air-flow and suspend
Get up, flue gas is mutually mixed with the first order absorption agent powder and circulation flying dust for adding herein, between particle, between gas and particle
Severe friction, forms fluid bed.High-temperature flue gas are mixed with the absorbent, circulating ash that add, carry out preliminary desulphurization reaction, while
In flue gas other sour gas such as sulfur trioxide, hydrogen chloride, hydrogen fluoride also with calcium hydroxide reaction, complete absorption.In one-level
Humidification water is sprayed into by swivel nozzle 3 at the humidification water inlet 15 on absorption tower 1, flue-gas temperature is rapidly decreased to 70 DEG C~80
DEG C, smoke moisture increase, first order absorption agent further reacts generation calcium sulfite, calcium sulfate, calcium carbonate powder with sulfur dioxide,
They are carried from the top of first grade absorption tower 1 by flue gas together with flying dust and enter deduster 4.Add due to being sprayed into first grade absorption tower 1
Wet water, flue-gas temperature is greatly lowered, the exhaust gas dust ratio resistance reduction after cooling, and flue gas and flying dust are carried out in deduster 4
Separate so that the efficiency of dust collection of deduster 4 is greatly improved, so as to reach dust minimum discharge.First order absorption agent and circulation dust
Return to the interior circulation of first grade absorption tower 1 and use through skewed slot 12, first order absorption agent entrance 16 in the bottom of deduster 4, improve one-level
The utilization rate of absorbent.
Air-introduced machine 5 is additionally provided with pipeline between deduster 4 and two-level absorption tower 6, the flue gas warp after the dedusting of removing dust device 4
Air-introduced machine 5 enters two-level absorption tower 6 after boosting.After flue gas enters two-level absorption tower 6, sprayed in flue gas and two-level absorption tower 6
Loop slurry carry out reverse contact and react, sulfur dioxide in flue gas and lime stone slurry reaction generation gypsum so that
Sulfur dioxide in flue gas is obtained further to absorb.In order to ensure that the lime stone slurry of two-level absorption tower 6 is supplied, in two-level absorption tower 6
Portion is connected by pipeline with two grades of absorbent slurry casees 7；Also pass through pipeline and vacuum belt machine in the bottom of two-level absorption tower 6 simultaneously
14 connections, complete the post processing of two-grade desulfurizing product gypsum.The flue gas purified by two-level absorption tower 6 passes through the demisting of demister 13
Chimney 11 is entered by flue afterwards.The waste water that the desulfurization of two-level absorption tower 6 is produced is flowed into wastewater collection tank 8, and wastewater collection tank 8 passes through
Pipeline is connected with the humidification water inlet 15 of first grade absorption tower 1.The humidification water that first grade absorption tower 1 is sprayed into mainly uses two-level absorption tower
The waste water that 6 wet desulphurizations or power plant produce, realizes wastewater zero discharge.
Embodiment 2：As shown in figure 1, this kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system include one
Level absorption tower 1, deduster 4,6, two grades of absorbent slurry casees 7 of two-level absorption tower, wastewater collection tank 8, the and of first grade desulfurizing agent feed bin 9
Chimney 11.First grade absorption tower 1 is half-dried desulfurizing tower, and the side of first grade absorption tower 1 is provided with humidification water inlet 15 and first order absorption agent enters
Mouth 16, humidification water inlet 15 is connected through pipeline with wastewater collection tank 8, and first order absorption agent entrance 16 is through pipeline and first grade desulfurizing agent material
Storehouse 9 is connected.The storage first order absorption agent hydrated lime in powder of first grade desulfurizing agent feed bin 9 is conveyed by fluidized wind through first order absorption agent entrance 16
Into inside first grade absorption tower 1.The top exit of first grade absorption tower 1 through flue and deduster 4, two-level absorption tower 6, chimney 11 successively
Connection, before first grade absorption tower 1 is arranged on deduster 4, after two-level absorption tower 6 is arranged on deduster 4.Two-level absorption tower 6 is wet type
Desulfurizing tower, the middle part of two-level absorption tower 6 is connected through pipeline with two grades of absorbent slurry casees 7, and it is fresh to be that two-level absorption tower 6 is continuously replenished
Lime stone slurry.After flue gas enters two-level absorption tower 6, flue gas reacts with the slurries in two-level absorption tower 6, so that
Sulfur dioxide in flue gas is obtained further to absorb.The bottom of two-level absorption tower 6 connects wastewater collection tank 8 through pipeline, in wastewater collection tank 8
Waste water by humidify water inlet 15 enter first grade absorption tower 1 inside be used as humidification water.Due to spraying into humidification in first grade absorption tower 1
Water so that flue-gas temperature is greatly lowered, the flue gas after cooling enters deduster 4, substantially increases the dedusting effect of deduster 4
Rate.The waste water that the humidification water that first grade absorption tower 1 is sprayed into mainly is produced using the wet desulphurization of two-level absorption tower 6 or power plant, realizes
Wastewater zero discharge.Consolidating in the complete first order absorption agent white lime of product and unreacted in first grade absorption tower 1 and deduster 4
Body particle etc. falls into ash bucket.
The course of work of the invention：First grade absorption tower 1 is initially entered from the flue gas out of boiler air preheater 10, with penetrating
, there is chemical reaction and complete initial absorption, then humidified further raising absorption efficiency in first order absorption agent, circulating ash mixing,
Sulfur trioxide simultaneously in flue gas, hydrogen chloride, the hydrogen fluoride calcium hydroxide higher with activity chemically react, and reach higher de-
Except rate.The flue gas for carrying a large amount of solid particles by flue gas after first grade desulfurizing is discharged into deduster from the top of first grade absorption tower 1
4.Due to spraying into humidification water in first grade absorption tower 1, flue-gas temperature is greatly lowered, and the flue gas after cooling enters deduster 4, than electricity
Resistance is substantially reduced, and flue gas flying dust is separated in deduster 4, substantially increases the efficiency of dust collection of deduster 4.Separate
The first order absorption agent that is supplemented with first grade desulfurizing agent feed bin 9 of particle together with looped back by skewed slot 12 and join again in first grade absorption tower 1
With desulphurization reaction so that up to a hundred times of solid particle iterative cycles, the utilization rate of first grade desulfurizing agent is improved.Flue gas after purification is through drawing
Blower fan 5 enters two-level absorption tower 6 after boosting.After flue gas enters two-level absorption tower 6, spray in flue gas and two-level absorption tower 6
There is physical-chemical reaction, sulfur dioxide in flue gas and lime stone slurry reaction generation gypsum in loop slurry, so that flue gas
Middle sulfur dioxide further absorbs.By two-level absorption tower 6 purification flue gas by entering cigarette by flue after the demisting of demister 13
Chimney 11.
Claims (9)
1. a kind of coal steam-electric plant smoke sulfur dioxide, dust and waste water coprocessing system, it is characterised in that including first grade absorption tower
(1), deduster (4), two-level absorption tower (6), two grades of absorbent slurry casees (7), wastewater collection tank (8), first grade desulfurizing agent feed bins
And chimney (11) (9)；The first grade absorption tower (1) is half-dried desulfurizing tower, and first grade absorption tower (1) side is provided with humidification water inlet
(15) and first order absorption agent entrance (16), humidification water inlet (15) is connected through pipeline with wastewater collection tank (8), and first order absorption agent enters
Mouth (16) is connected through pipeline with first grade desulfurizing agent feed bin (9), and first grade absorption tower (1) top is through flue and deduster (4), two
Level absorption tower (6), chimney (11) are sequentially connected；The two-level absorption tower (6) is wet desulphurization tower, two-level absorption tower (6) middle part
It is connected with two grades of absorbent slurry casees (7) through pipeline, two-level absorption tower (6) bottom connects wastewater collection tank (8) through pipeline.
2. coal steam-electric plant smoke sulfur dioxide according to claim 1, dust and waste water coprocessing system, its feature exist
In, skewed slot (12) is additionally provided with, deduster (4) bottom enters through the first order absorption agent of skewed slot (12) connection first grade absorption tower (1)
Mouth (16).
3. coal steam-electric plant smoke sulfur dioxide according to claim 2, dust and waste water coprocessing system, its feature exist
In first grade absorption tower (1) bottom is additionally provided with Venturi (2), and boiler air preheater (10) is filled through flue connection venturi
Put (2).
4. coal steam-electric plant smoke sulfur dioxide according to claim 3, dust and waste water coprocessing system, its feature exist
In humidification water inlet (15) place of the first grade absorption tower (1) is additionally provided with swivel nozzle (3).
5. coal steam-electric plant smoke sulfur dioxide according to claim 4, dust and waste water coprocessing system, its feature exist
In being additionally provided with air-introduced machine (5) on the pipeline between the deduster (4) and two-level absorption tower (6).
6. coal steam-electric plant smoke sulfur dioxide according to claim 5, dust and waste water coprocessing system, its feature exist
In, demister (13) is additionally provided between the two-level absorption tower (6) and chimney (11), the demister (13) is placed in two grades of absorptions
Tower (6) top.
7. coal steam-electric plant smoke sulfur dioxide according to claim 6, dust and waste water coprocessing system, its feature exist
In, vacuum belt machine (14) is additionally provided with, two-level absorption tower (6) bottom is also by pipeline communication in vacuum belt machine (14).
8. coal steam-electric plant smoke sulfur dioxide according to claim 7, dust and waste water coprocessing system, its feature exist
In the deduster (4) is electrostatic precipitator and/or electrostatic fabric filter.
9. coal steam-electric plant smoke sulfur dioxide according to claim 8, dust and waste water coprocessing system, its feature exist
In the internal absorbent of the first grade desulfurizing agent feed bin (9) is white lime, the internal suction of two grades of absorbent slurry casees (7)
Receipts agent is lime stone slurry.
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| CN108970337A (en) * | 2018-07-26 | 2018-12-11 | 扬州嘉明环保科技有限公司 | Reduce dry method Sulphuric acid device wastewater discharge system and its application method |
| CN109351156A (en) * | 2018-11-20 | 2019-02-19 | 东方电气集团东方锅炉股份有限公司 | A kind of the removing system and removal methods of cement kiln tail gas sulphur dioxide |
| CN113479922A (en) * | 2021-08-10 | 2021-10-08 | 江苏天楹等离子体科技有限公司 | Water washing-plasma melting garbage incineration fly ash recycling device and method |
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Application publication date: 20170707 |