CN102319714A - Treatment process of dry method or semi-dry method smoke gas desulfurized slag - Google Patents
Treatment process of dry method or semi-dry method smoke gas desulfurized slag Download PDFInfo
- Publication number
- CN102319714A CN102319714A CN201110126179A CN201110126179A CN102319714A CN 102319714 A CN102319714 A CN 102319714A CN 201110126179 A CN201110126179 A CN 201110126179A CN 201110126179 A CN201110126179 A CN 201110126179A CN 102319714 A CN102319714 A CN 102319714A
- Authority
- CN
- China
- Prior art keywords
- dry method
- slag
- semi
- steel slag
- oxidation
- Prior art date
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a treatment process of dry method or semi-dry method smoke gas desulfurized slag, which provides a new process for calcium base dry method or semi-dry method smoke gas desulfurized slag utilizing liquid steel slag afterheat for oxidization. The calcium base dry method or semi-dry method smoke gas desulfurized slag has the major ingredients of calcium sulfite, the calcium sulfite is mixed with compressed high-temperature steel slag particles crushed by air beams, the materials enter an oxidization rotary kiln for carrying out sufficient stirring, heat transfer and oxidization, then, a grate cooler is used for cooling and temperature reduction, wind power screening equipment is used for screening, the steel slag particles are directly discharged out, and the oxidized desulfurized slag is carried to a cloth bag material collector through gas to be collected. The desulfurized slag treated by the process has more than 80 percent of calcium sulfite and aluminum oxides and can be directly used as auxiliary building materials, and the steel slag particles can be used as building material raw materials after being finely ground.
Description
Technical field
The present invention relates to a kind of dry method or semi-dry process flue gas desulphurization residues processing technique, belong to the Solid Waste Treatment technical field.
Background technology
The acid rain pollution of China is main with sulfuric acid type, and pollution tendencies constantly increases the weight of.The sulfur dioxide that in Eleventh Five-Year Plan, just requires of country reduces discharging 10%, with the sulfur dioxide (SO2) emissions overall control at 18,000,000 tons.For this reason, thermal power generation industry, metallurgy sintered industry have been built a large amount of flue gas desulfurization facilities as the discharging key industry of sulfur dioxide.Most widely used technology is limestone-gypsum wet method, rotating spraying semidry method and circulating fluidized bed dry in these facilities.Wherein rotating spraying semidry method and circulating fluidized bed dry technology all is to adopt quick lime or calcium hydroxide to make desulfurizing agent, and desulfurization slag is the dry state granular material, and its major ingredients is a calcium sulfite.
At present; A large amount of desulfurization slag of calcium backbone method, semidry process desulfurizer generation generally all are to adopt the mode of backfill or stacking to handle both at home and abroad; The place that requires that so a large amount of backfills is arranged or stack, the added value of desulfurization slag is very low, causes secondary pollution easily.For the utilization technology of dry method or semi-dry desulphurization slag, also carried out certain research both at home and abroad, the major technique path is the mode that adopts catalysis or heating, and the calcium sulfite oxidation in the desulfurization slag is become calcium sulfate, does the building materials auxiliary material and uses.But no matter be catalysis or heated oxide technology, all will pay very high cost, and the value of product be limited, make these technology can't commercial applications.
The present invention is a cover new technology of on the waste heat that utilizes slag comes the basis of heated oxide desulfurization slag principle, developing; The surplus temperature of slag is up to more than 1000 degrees centigrade; The used heat that belongs to metallurgy industry at present; Utilize cost very low, the desulfurization slag after the oxidation can be used as the building materials auxiliary material and uses, so new technology has excellent economy.
Summary of the invention
The purpose of this invention is to provide a kind of dry method or semi-dry process flue gas desulphurization residues processing technique, the heat of this technology utilization liquid steel slag carries out heated oxide to the dry desulfurization slag and handles oxidation sweetening ground-slag end and steel slag particle after obtaining separating.
Technical scheme of the present invention is following:
A kind of processing dry method or semi-dry process flue gas desulphurization residues processing technique is characterized in that this technology comprises the steps:
1) granulation is mixed: through hanging device the liquid steel slag in the slag ladle is poured in the tundish, liquid steel slag goes out through the concentrated flow that effluents, and is compressed the air beam pulverizing and is the steel slag particle of high temperature in mixing bunker, to mix again with a certain amount of desulfurization slag.The mass ratio of slag and desulfurization slag is controlled between 0.5: 1 to 6: 1 scope in the mixture.
2) heat transfer oxidation: the oxidation reaction of desulfurization slag takes place in the oxidation rotary kiln.The mixture of steel slag particle and desulfurization slag and little air get into from the oxidation rotary kiln, and along with the rotation of kiln body, steel slag particle fully mixes with desulfurization slag, and diabatic process takes place, and promote the oxidation of desulfurization slag.Mixture is discharged from the oxidation rotary kiln end, and its temperature is controlled at below 400 ℃.
3) cooling sorting: said mixture is cooled to below 100 ℃ through castor formula cooler, utilizes wind filter equipment to carry out sorting again, and steel slag particle is discharged from the wind filter device bottom, and oxidation sweetening ground-slag end is taken in the cloth bag collector by air-flow and collected.
Technical characterictic of the present invention is that also the steel slag particle temperature requirement after the compressed air bundle is pulverized is controlled at below 900 ℃, and compressed-air actuated pressure limit requires between 0.2-0.8MPa, and the calcium sulfite oxidation rate is greater than 80%.
Present technique has the following advantages:
1) adopted the process route of the treatment of wastes with processes of wastes against one another, utilized the slag waste heat to come the heated oxide desulfurization slag, realized the conversion of calcium sulfite, conversion ratio is high, and cost is low, good economy performance.
2) final products are the steel slag particle of separation and the desulfurization slag powder that main component is calcium sulfate.The steel slag particle rerum natura is stable, does the building materials raw material after can be levigate.The desulfurization slag powder also can directly be done the building materials auxiliary material.
3) nucleus equipment of this technological process is the oxidation rotary kiln, and system is simple, and equipment is ripe, and system availability is high.
4) whole system is in air-tight state, can not produce secondary pollutions such as dust.
Description of drawings
Fig. 1 is a process chart of the present invention.
The main label declaration of accompanying drawing
1-desulfurization slag storehouse 2-liquid steel slag
3-compressed air 4-tundish;
5-mixing bunker 6-oxidation rotary kiln
7-castor formula cooler 8-chain scraper conveyor
9-wind filter equipment 10-steel slag particle
11-contains desulfurization slag flue gas 12-cloth bag collector
The specific embodiment
By means of accompanying drawing technological process of the present invention is further described below.
Fig. 1 is a process chart of the present invention.
Utilize hanging device with liquid steel slag 2 from the slag bag that tilts to going out, the slowly stable tundish 4 that enters into contracts out from the centre to stablize the chute through tundish buffering back and flows in the mixing bunker 5.Tundish 4 bottoms are connected with compressed air 3 bundles, and liquid steel slag 2 is smashed, and liquid steel slag is because surface tension effects forms granule one by one, and temperature is mixed with the desulfurization slag that from desulfurization slag storehouse 1, transports below 900 ℃ again.The supply gas pressure of compressed air 3 can be regulated as required, and pressure limit is controlled between the 0.8-0.2MPa.
Desulfurization slag and steel slag particle mixture get into from oxidation rotary kiln 6 kiln tails, through the stirring action of peroxidating rotary kiln 6, make mixture fully mix, uniformly transfer heat, fully oxidation.The kiln tail is provided with air intake device, make and remain micro-vacuum state in the kiln, from the kiln tail have fresh air mend into, guarantee that oxidation reaction carries out smoothly.When mixture ran to kiln hood, temperature was controlled at below 400 ℃.
Mixture directly gets into castor formula cooler 7 through the kiln hood cover, and the cooling blower air-supply is arranged at the comb plate of castor formula cooler bottom, cooling air from bottom to top through the bed of material after the kiln hood cover enters into discharges after cloth bag collector 12 is collected dust.Mixture, is discharged on the plate-and-chain conveyer 8 after castor formula cooler 7 head crusher in crushing to below 100 ℃ by air-cooled, enters into wind filter equipment 9.
Compound rises to certain altitude through plate-and-chain conveyer 8; Get into from wind filter equipment 9 tops; Collide with wind filter equipment 9 inner stages baffle plates; Desulfurization slag after the oxidation is carried by baffle plate below air-flow, enters into cloth bag collector 12 through wind filter equipment 9 top gas pipelines 11, is collected in the ash storehouse, cloth bag collector 12 bottoms.The particle diameter of steel slag particle 10 and than great is deposited in wind filter equipment 9 bottoms, and discharging regularly is transported to slag through automobile and handles line and handle.The oxidation sweetening slag that cloth bag collector 12 is collected can be stored in the feed bin, regularly is transported to the building materials production line and handles.
With several specific embodiments the present invention is described below:
Embodiment 1: handle 90 tons of desulfurization slag every day, allocate 270 tons of liquid steel slags every day into.Desulfurization slag and liquid steel slag add in batches, and every batch adds 6 tons of desulfurization slag, adds 18 tons of liquid steel slags simultaneously, and steel slag particle and desulfurization slag proportioning are 3: 1.Compound is from going into kiln to the kiln discharge time about 75 minutes, and wherein the kiln internal reaction is 50 minutes, 320 ℃ of compound kiln discharge temperature, calcium sulfite conversion ratio 80%.
Embodiment 2: handle 60 tons of desulfurization slag every day, allocate 240 tons of liquid steel slags every day into.Desulfurization slag and liquid steel slag add in batches, and every batch adds 5 tons of desulfurization slag, adds 20 tons of liquid steel slags simultaneously, and steel slag particle and desulfurization slag proportioning are 3: 1.Compound is from going into kiln to the kiln discharge time about 65 minutes, and wherein the kiln internal reaction is 40 minutes, 380 ℃ of compound kiln discharge temperature, calcium sulfite conversion ratio 90%.
Claims (4)
1. dry method or semi-dry process flue gas desulphurization residues processing technique is characterized in that this technology comprises the steps:
1) granulation is mixed, and pours the liquid steel slag in the slag ladle into tundish after the concentrated flow that effluents goes out through hanging device, and be compressed the air beam pulverizing and be the steel slag particle of high temperature in mixing bunker, to mix again with a certain amount of desulfurization slag,
2) heat transfer oxidation; The mixture of steel slag particle and desulfurization slag and little air get into the oxidation rotary kiln from the oxidation rotary kiln, and along with the rotation of oxidation rotary kiln body, steel slag particle fully mixes with desulfurization slag; Diabatic process takes place; Promote the oxidation of desulfurization slag, said mixture is discharged from the oxidation rotary kiln end
3) cooling sorting, said mixture is cooled to below 100 ℃ through castor formula cooler, utilizes wind filter equipment to carry out sorting again, and steel slag particle is discharged from the wind filter device bottom, and the desulfurization slag after the oxidation is taken in the cloth bag collector by air-flow and is collected.
2. a kind of dry method according to claim 1 or semi-dry process flue gas desulphurization residues processing technique is characterized in that, in the said step 1), the mass ratio that gets into steel slag particle and the desulfurization slag of mixing bunker is controlled between 0.5: 1 to 6: 1 scope.
3. a kind of dry method according to claim 1 or semi-dry process flue gas desulphurization residues processing technique; It is characterized in that; In the said step 1), the steel slag particle temperature requirement after the compressed air bundle is pulverized is controlled at below 900 ℃, and compressed-air actuated pressure limit requires between 0.2-0.8MPa.
4. a kind of dry method according to claim 1 or semi-dry process flue gas desulphurization residues processing technique is characterized in that, said step 2) in, the temperature of the mixture that the oxidation rotary kiln end is discharged is controlled at below 400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101261791A CN102319714B (en) | 2011-05-16 | 2011-05-16 | Treatment process of dry method or semi-dry method smoke gas desulfurized slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101261791A CN102319714B (en) | 2011-05-16 | 2011-05-16 | Treatment process of dry method or semi-dry method smoke gas desulfurized slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102319714A true CN102319714A (en) | 2012-01-18 |
| CN102319714B CN102319714B (en) | 2013-06-12 |
Family
ID=45447619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101261791A Active CN102319714B (en) | 2011-05-16 | 2011-05-16 | Treatment process of dry method or semi-dry method smoke gas desulfurized slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102319714B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014195A (en) * | 2012-06-14 | 2013-04-03 | 新疆八一钢铁股份有限公司 | Novel method for modification of KR desulfuration residue |
| CN113683323A (en) * | 2021-09-15 | 2021-11-23 | 中冶南方都市环保工程技术股份有限公司 | Modified steel slag desulfurized ash mixture, preparation method thereof and cementing material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04310279A (en) * | 1991-04-08 | 1992-11-02 | Babcock Hitachi Kk | Oxidizing apparatus of sulfite compound-containing ash |
| CN101823697A (en) * | 2010-04-21 | 2010-09-08 | 苏州科技学院 | Method for preparing hydrotalcite-like compounds by flue gas desulfurized waste residue |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4310279B2 (en) * | 2002-12-27 | 2009-08-05 | 株式会社クレハ | Method for producing polyarylene sulfide, method for washing, and method for purifying organic solvent used for washing |
-
2011
- 2011-05-16 CN CN2011101261791A patent/CN102319714B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04310279A (en) * | 1991-04-08 | 1992-11-02 | Babcock Hitachi Kk | Oxidizing apparatus of sulfite compound-containing ash |
| CN101823697A (en) * | 2010-04-21 | 2010-09-08 | 苏州科技学院 | Method for preparing hydrotalcite-like compounds by flue gas desulfurized waste residue |
Non-Patent Citations (2)
| Title |
|---|
| 张仁鹏等: "浅谈烟气脱硫渣的利用", 《中国资源综合利用》 * |
| 陈潇等: "干法烟气脱硫渣在建材行业中高技术附加值利用的探讨", 《中国资源综合利用》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014195A (en) * | 2012-06-14 | 2013-04-03 | 新疆八一钢铁股份有限公司 | Novel method for modification of KR desulfuration residue |
| CN103014195B (en) * | 2012-06-14 | 2014-05-28 | 新疆八一钢铁股份有限公司 | Novel method for modification of KR desulfuration residue |
| CN113683323A (en) * | 2021-09-15 | 2021-11-23 | 中冶南方都市环保工程技术股份有限公司 | Modified steel slag desulfurized ash mixture, preparation method thereof and cementing material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102319714B (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100584745B1 (en) | An apparatus and method for recycling dust and sludge containing iron ironmaking process using coal and fine ore | |
| CN111100719B (en) | Preparation method of water-washed fly ash derived fuel | |
| PL241588B1 (en) | Method and installation for obtaining light ceramic aggregate, preferably from ashes after burning of coal | |
| CN112142445A (en) | Method for preparing ceramsite by mixing municipal domestic sludge and shale | |
| CN103344114B (en) | A kind of novel energy-saving emission-reducing sintering machine system and sintering method | |
| CN101955166B (en) | Method for decomposing semi-hydrated phosphogypsum | |
| CN101560067B (en) | Technology for preparing cement by dry carbide slag method | |
| CN108502884A (en) | A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification | |
| CN102319714B (en) | Treatment process of dry method or semi-dry method smoke gas desulfurized slag | |
| CN205152076U (en) | Electrolytic manganese sediment utilization system | |
| CN111747727B (en) | System and process for sintering copper-nickel-containing solid hazardous waste | |
| CN213596170U (en) | Production line for producing cement clinker by solid-waste blending | |
| CN212610314U (en) | Copper-nickel-containing solid hazardous waste sintering system | |
| CN213388289U (en) | Multifunctional metallurgy solid waste recovery system | |
| CN211620349U (en) | Steel mill sludge treatment system | |
| CN111116010A (en) | Steel mill sludge treatment system and utilization method | |
| CN216027009U (en) | Solid waste treatment system | |
| CN111348848A (en) | Method for using high-sulfur raw material for cement kiln | |
| CN220597334U (en) | Blast furnace slag micropowder preparation and hot-blast furnace flue gas purification treatment system | |
| CN218014854U (en) | High-sulfur coal slag treatment system | |
| CN117510106B (en) | Steel slag carbon capturing recycling treatment device | |
| CN218795009U (en) | Purification system for semi-dry or dry desulphurization byproducts | |
| CN220951872U (en) | Metallurgical solid waste treatment system based on direct reduction and melt separation duplex method | |
| CN218554162U (en) | Device based on electrolytic manganese sediment preparation ardealite decomposition catalyst | |
| CN203620493U (en) | System for carrying out wet desulphurization by utilizing fly ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA JINGYE ENGINEERING CORPORATION LIMITED MCC E Free format text: FORMER OWNER: CHINA JINGYE ENGINEERING CORPORATION LIMITED Effective date: 20131225 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131225 Address after: 100088 Beijing city Haidian District Xitucheng Road No. 33 Patentee after: MCC Central Research Institute of Building and Construction Co., Ltd. Patentee after: China Jingye Engineering Technology Co., Ltd. Patentee after: MCC Engineering Technology Co., Ltd. Address before: 100088 Beijing city Haidian District Xitucheng Road No. 33 Patentee before: MCC Central Research Institute of Building and Construction Co., Ltd. Patentee before: China Jingye Engineering Technology Co., Ltd. |