CN109092042A - It is a kind of that SO in flue gas is removed using steel slag2With SO3System and its working method - Google Patents
It is a kind of that SO in flue gas is removed using steel slag2With SO3System and its working method Download PDFInfo
- Publication number
- CN109092042A CN109092042A CN201811004501.1A CN201811004501A CN109092042A CN 109092042 A CN109092042 A CN 109092042A CN 201811004501 A CN201811004501 A CN 201811004501A CN 109092042 A CN109092042 A CN 109092042A
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- China
- Prior art keywords
- flue gas
- steel slag
- steel
- dissolving tank
- wet desulphurization
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/126—Semi-solid reactants, e.g. slurries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of using SO in steel slag removing flue gas2With SO3System and its working method, belong to industrial waste gas process field.How absorbent cost is reduced as current coal-fired flue-gas SO2With SO3The important research direction of removing sulfuldioxide.The present invention includes boiler, economizer, SCR denitration reaction device, air preheater, atomization jetting device, deduster, wet desulphurization device, chimney, steel slag dissolving tank and blender；Boiler, economizer, SCR denitration reaction device, air preheater, deduster, wet desulphurization device and chimney are sequentially communicated；Atomization jetting device is arranged between air preheater and deduster, and steel slag dissolving tank is connected to wet desulphurization device, and blender is arranged in steel slag dissolving tank, and atomization jetting device is connected to steel slag dissolving tank.By the way that the dissolved supernatant of steel slag and rich solution are respectively used to SO in removing flue gas2With SO3, to realize while remove the SO in flue gas2With SO3, effectively increase utilization rate of steel slag.
Description
Technical field
The present invention relates to a kind of using SO in steel slag removing flue gas2With SO3System and its working method, belong to Industry Waste
Gas disposal field.
Background technique
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas pollutant
Discharge is an important process of China's control atmosphere pollution.The most widely used flue gas of current coal fired power plant flue gas desulfurization device
Desulfurization technology is Limestone-gypsum Wet Flue Gas Desulfurization Process technology, the technique have the advantages that efficiently, it is mature, stable, but need using stone
Thus lime stone brings mineral resources consumption, higher cost, causes secondary pollution problems as absorbent.Enter industry at present
The flue gas SO of application3Removing sulfuldioxide includes alkaline absorbent injection, low temperature electric precipitator, wet electrical dust precipitator etc., wherein alkali
Property sorbent injection technology it is high, adaptable due to removal efficiency the advantages that, be widely regarded as flue gas SO3The weight of removing sulfuldioxide
The problem of wanting developing direction, but equally existing absorbent higher cost.Therefore how to reduce absorbent cost becomes current coal-fired
Flue gas SO2With SO3The important research direction in removing sulfuldioxide field.
Steel slag is the byproduct of STEELMAKING PRODUCTION, and main component has CaO, SiO2、Fe2O3、A12O3, MgO etc..China is as steel
Yield big country, steel slag is abandoned as waste for a long time, has not only occupied a large amount of soils but also polluted underground water.By analyzing, testing, steel
The main component of slag can satisfy coal-fired flue-gas SO2With SO3Removing process can reach higher the quality requirements of absorbent
Removal efficiency.Steel slag is applied to coal-fired flue-gas SO2With SO3Removing, can be realized the treatment of wastes with processes of wastes against one another, save the cost, for protection
Environment is of great significance.
Patent related to the present invention, such as 101428193 B of CN --- " wet-type desulfuration method for steel scoria of flue gas ", be by
Steel slag solution is as absorbent, using the SO in wet desulfurizing process removing flue gas2, realize the treatment of wastes with processes of wastes against one another of steel slag.But by
It is slower in the rate of dissolution of steel slag in aqueous solution, the desulfuration efficiency of the method is limited, the row of current high standard is unable to satisfy
Put requirement.
For another example 104857841 A of CN --- " device and method of sulfur trioxide in a kind of removing flue gas ", be by
Strong basicity absorbent is sprayed into flue before SCR denitration reaction device, realizes SO in removing flue gas3Purpose.But the method exists
High SO3Removal efficiency requires lower absorbent consumption larger, and corresponding operating cost is higher, and excess absorbent be easy to cause SCR to be catalyzed
Agent alkalosis influences the problems such as dust specific resistance.
Summary of the invention
The purpose of the present invention is spray coal-fired flue-gas SO for current Limestone-gypsum Wet Flue Gas Desulfurization Process, base3Removing, steel
Slag removes coal-fired flue-gas SO as absorbent2Technology there are the problem of, propose it is a kind of using steel slag removing flue gas in SO2With SO3
System and its working method.
Technical solution used by the present invention solves the above problems is: a kind of using SO in steel slag removing flue gas2With SO3's
System, including boiler, which is characterized in that further include economizer, SCR denitration reaction device, air preheater, atomization jetting device, dedusting
Device, wet desulphurization device, chimney, steel slag dissolving tank and blender；The boiler, economizer, SCR denitration reaction device, air preheater,
Deduster, wet desulphurization device and chimney are sequentially communicated；The atomization jetting device is arranged between air preheater and deduster, institute
It states steel slag dissolving tank to be connected to wet desulphurization device, the blender is arranged in steel slag dissolving tank, the atomization jetting device
It is connected to steel slag dissolving tank.
Furthermore, steel-making slag powder and water are loaded in the steel slag dissolving tank.
Furthermore, the supernatant in the steel slag dissolving tank is supplemented in wet desulphurization device, for removing flue gas
In SO2。
Furthermore, the rich solution in the steel slag dissolving tank by atomization jetting device spray into air preheater and deduster it
Between flue in, for removing the SO in flue gas3。
Above-mentioned removes SO in flue gas using steel slag2With SO3System working method it is as follows: flue gas from boiler come out after,
Successively step by step after economizer, SCR denitration reaction device, air preheater, deduster and wet desulphurization device, chimney row is eventually entered into
It puts；By in steel-making slag powder and water investment steel slag dissolving tank, under the action of blender, accelerate steel-making slag powder dissolution, dissolution supernatant is mended
It is charged in wet desulphurization device slurry pool, removes the SO in flue gas2, dissolution rich solution by atomization jetting device spray into air preheater and
In flue between deduster, the SO in flue gas is removed3。
Steel-making slag powder consumption is according to the SO in exhaust gas volumn and flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined, supernatant
Liquid and rich solution allocation proportion are according to the SO in flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined.
When supernatant is not able to satisfy the service requirement of wet desulphurization device, wet desulphurization is using lime stone slurry as auxiliary
Help desulfurizing agent.
Compared with prior art, the present invention having the following advantages that and effect: the SO in flue gas can be removed simultaneously2With SO3, and
The utilization rate for effectively increasing steel slag realizes waste utilization, and reduces the cost of absorbent used in desulfurization, has system letter
The advantages that single, energy-saving, application prospect is extensive.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure: boiler 1, economizer 2, SCR denitration reaction device 3, air preheater 4, atomization jetting device 5, deduster 6, wet process
Desulfurizer 7, chimney 8, steel slag dissolving tank 9, blender 10.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
It is a kind of using SO in steel slag removing flue gas referring to Fig. 12With SO3System, including boiler 1, economizer 2, SCR denitration
Reactor 3, air preheater 4, atomization jetting device 5, deduster 6, wet desulphurization device 7, chimney 8, steel slag dissolving tank 9 and blender
10；Boiler 1, economizer 2, SCR denitration reaction device 3, air preheater 4, deduster 6, wet desulphurization device 7 and chimney 8 are sequentially communicated；
Atomization jetting device 5 is arranged between air preheater 4 and deduster 6, and steel slag dissolving tank 9 is connected to wet desulphurization device 7, blender
10 are arranged in steel slag dissolving tank 9, and atomization jetting device 5 is connected to steel slag dissolving tank 9.
Steel-making slag powder and water are loaded in steel slag dissolving tank 9.Supernatant in steel slag dissolving tank 9 is supplemented to wet desulphurization device
In 7, for removing the SO in flue gas2.Rich solution in steel slag dissolving tank 9 sprays into air preheater and deduster by atomization jetting device
Between flue in, for removing the SO in flue gas3。
Above-mentioned removes SO in flue gas using steel slag2With SO3System working method it is as follows: flue gas comes out from boiler 1
Afterwards, successively step by step after economizer 2, SCR denitration reaction device 3, air preheater 4, deduster 6 and wet desulphurization device 7, finally into
Enter the discharge of chimney 8；By in steel-making slag powder and water investment steel slag dissolving tank 9, under the action of blender 10, accelerate steel-making slag powder dissolution,
Dissolution supernatant is supplemented in 7 slurry pool of wet desulphurization device, removes the SO in flue gas2, dissolve rich solution and pass through atomized spray dress
It sets in the flue between 5 penetrating air preheaters 4 and deduster 6, removes the SO in flue gas3。
Steel-making slag powder consumption is according to the SO in exhaust gas volumn and flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined, supernatant
Liquid and rich solution allocation proportion are according to the SO in flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined.
When supernatant is not able to satisfy the service requirement of wet desulphurization device 7, wet desulphurization uses lime stone slurry conduct
Assist desulfurizing agent.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (7)
1. a kind of using SO in steel slag removing flue gas2With SO3System, including boiler, which is characterized in that further include economizer,
SCR denitration reaction device, air preheater, atomization jetting device, deduster, wet desulphurization device, chimney, steel slag dissolving tank and stirring
Device；The boiler, economizer, SCR denitration reaction device, air preheater, deduster, wet desulphurization device and chimney are sequentially communicated；Institute
It states atomization jetting device to be arranged between air preheater and deduster, the steel slag dissolving tank is connected to wet desulphurization device, described
Blender is arranged in steel slag dissolving tank, and the atomization jetting device is connected to steel slag dissolving tank.
2. according to claim 1 using SO in steel slag removing flue gas2With SO3System, which is characterized in that the steel slag
Steel-making slag powder and water are loaded in dissolving tank.
3. according to claim 2 using SO in steel slag removing flue gas2With SO3System, which is characterized in that the steel slag
Supernatant in dissolving tank is supplemented in wet desulphurization device, for removing the SO in flue gas2。
4. according to claim 2 using SO in steel slag removing flue gas2With SO3System, which is characterized in that the steel slag
Rich solution in dissolving tank is sprayed into the flue between air preheater and deduster by atomization jetting device, for removing in flue gas
SO3。
5. according to claim 1 using SO in steel slag removing flue gas described in any one of -4 claims2With SO3System
Working method, which is characterized in that the working method is as follows: flue gas from boiler come out after, successively step by step pass through economizer, SCR
After Benitration reactor, air preheater, deduster and wet desulphurization device, smoke stack emission is eventually entered into；Steel-making slag powder and water are put into steel
In slag dissolving tank, under the action of blender, accelerate steel-making slag powder dissolution, dissolution supernatant is supplemented to wet desulphurization device slurry pool
It is interior, remove the SO in flue gas2, dissolution rich solution is sprayed into the flue between air preheater and deduster by atomization jetting device, de-
Except the SO in flue gas3。
6. according to claim 5 using SO in steel slag removing flue gas2With SO3System working method, feature exists
In the steel-making slag powder consumption is according to the SO in exhaust gas volumn and flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined, supernatant
With rich solution allocation proportion according to the SO in flue gas2With SO3The boundary condition of concentration, which is calculated, to be determined.
7. according to claim 5 using SO in steel slag removing flue gas2With SO3System working method, feature exists
In when supernatant is not able to satisfy the service requirement of wet desulphurization device, wet desulphurization is de- as auxiliary using lime stone slurry
Sulphur agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004501.1A CN109092042A (en) | 2018-08-30 | 2018-08-30 | It is a kind of that SO in flue gas is removed using steel slag2With SO3System and its working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004501.1A CN109092042A (en) | 2018-08-30 | 2018-08-30 | It is a kind of that SO in flue gas is removed using steel slag2With SO3System and its working method |
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| Publication Number | Publication Date |
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| CN109092042A true CN109092042A (en) | 2018-12-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404378A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of Multifunctional smoke SO3Remove experimental rig and its working method |
| CN113350997A (en) * | 2021-06-08 | 2021-09-07 | 云南民族大学 | Method and system for wet removal of sulfur dioxide from blast furnace ironmaking dust |
| CN114229852A (en) * | 2021-12-03 | 2022-03-25 | 山西大学 | Method for removing SO in flue gas by using steel slag2Method for synergistically extracting silica gel |
| CN115400577A (en) * | 2022-09-01 | 2022-11-29 | 宁波大学 | Desulfurization method for mixed pulping of steel slag, clay and limestone and mixed desulfurizer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404378A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of Multifunctional smoke SO3Remove experimental rig and its working method |
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| CN114229852A (en) * | 2021-12-03 | 2022-03-25 | 山西大学 | Method for removing SO in flue gas by using steel slag2Method for synergistically extracting silica gel |
| CN114229852B (en) * | 2021-12-03 | 2024-03-22 | 山西大学 | SO in flue gas is removed by utilizing steel slag 2 Method for synergistically extracting silica gel |
| CN115400577A (en) * | 2022-09-01 | 2022-11-29 | 宁波大学 | Desulfurization method for mixed pulping of steel slag, clay and limestone and mixed desulfurizer |
| CN115400577B (en) * | 2022-09-01 | 2024-04-12 | 宁波大学 | Method for pulping and desulfurizing steel slag, clay and limestone by mixing and mixed desulfurizing agent |
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