CN102659330A - Desulfurization gypsum recycling method - Google Patents
Desulfurization gypsum recycling method Download PDFInfo
- Publication number
- CN102659330A CN102659330A CN2012101144167A CN201210114416A CN102659330A CN 102659330 A CN102659330 A CN 102659330A CN 2012101144167 A CN2012101144167 A CN 2012101144167A CN 201210114416 A CN201210114416 A CN 201210114416A CN 102659330 A CN102659330 A CN 102659330A
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- China
- Prior art keywords
- finished product
- gypsum
- calcining
- machine
- plaster
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Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 17
- 239000010440 gypsum Substances 0.000 title claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 6
- 230000023556 desulfurization Effects 0.000 title abstract description 6
- 238000004064 recycling Methods 0.000 title abstract 3
- 238000001354 calcination Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 230000004048 modification Effects 0.000 claims abstract description 7
- 238000012986 modification Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 3
- 239000011505 plaster Substances 0.000 claims description 19
- 239000011507 gypsum plaster Substances 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 4
- 238000010924 continuous production Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000000498 ball milling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 201000010260 leiomyoma Diseases 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 14
- 239000000047 product Substances 0.000 description 11
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 206010009866 Cold sweat Diseases 0.000 description 1
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 125000004122 cyclic group Chemical class 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a desulfurization gypsum recycling method, and belongs to the field of comprehensive utilization of industrial waste residues. The desulfurization gypsum recycling method includes four process links comprising raw material conveying, material calcining, cooling and grinding, and finished product material conveying and storing, namely, desulfurization gypsum is conveyed to an indirect internal heating type rotary kiln to calcine via a belt, a wet material bin, a belt scale and a double-screw feeding machine, the calcination temperature ranges from 120 DEG C to 160 DEG C, after being forcedly cooled to the temperature ranging from 60 DEG C to 80 DEG C via a cooling machine, finished product materials discharged from a calcination machine are conveyed to a modifying ball milling machine to perform milling modification, gypsum particles are modified into fibroid building gypsum powder, and the produced building gypsum powder is stored in a finished product bin. The building gypsum powder is produced by a one-step method, a process is stable, operation is simple, and long-term and continuous production can be realized.
Description
Technical field
The invention belongs to industrial residue comprehensive utilization field, the processing that is mainly used in desulfurated plaster utilizes again, is processed into the gesso that can supply building material industry to utilize especially for the fuel-burning power plant desulfurated plaster.
Background technology
Along with the pay attention to day by day of country for flue-gas desulfurizing engineering, domestic many large coal-fired power plants all begin to launch sweetener.The fuel-burning power plant adopts wet type Wingdale-gypsum method technology to carry out the desulfurization of flue gas mostly, and desulfurization degree can reach more than 90%, but the also output endlessly of sub product desulfurated plaster of deriving.Nearly about 5,000 ten thousand tons of the contracts desulfurated plaster amount of present Power Plant in China wherein only has a small amount of being used as outside the cement setting retarder, and the overwhelming majority is still done to stack and landfill disposal.Stack these industry byproducts and not only take a large amount of soils, and pollute the environment and groundwater resource.
The desulfurated plaster color substantial white of output when desulfurizer normally moves, when the purity of Wingdale was higher, generally between 90%-95%, alkalinity was low for the purity of desulfurated plaster, and detrimental impurity is few.Gypsum through after purifying is superior to the plaster of paris especially aspect performance index, be applied in the building materials field so can it be sintered into gesso.That building materials of gypsum has is fire-resistant, sound insulation, damping, good characteristic such as energy-conservation, is the material that development potentiality is quite arranged in cement, lime, the gypsum three big gelling material.
Although desulfurated plaster is extraordinary gypsum material, a lot of with plaster of paris performance difference, plaster stone wet-milling shape for example, water ratio is high, and grain composition is unreasonable etc.Aspect treatment process and equipment, the treatment process of the plaster of paris and equipment also not exclusively are fit to desulfurated plaster, exist drying thoroughly and calcinating consumption high, yield poorly, mass transport is difficult, problems such as dust is big in the treating processes.
Summary of the invention
For utilization of waste material, what the present invention provided a kind of desulfurated plaster utilizes method again.
Technical process of the present invention is: the present invention includes raw material conveying, material calcining, cooling grinding, four process procedures of finished product materials conveying storage;---wet feed storehouse---weighing belt---duplex feeding machine is delivered to indirect internal heat type rotary kiln and calcines through belt to be about to desulfurated plaster; Calcining temperature is 120-160 ℃, and calcination time is decided by the water cut of desulfurated plaster; Deliver to the modification ball mill after the finished product materials that the calcining machine comes out forces to be cooled to 60-80 ℃ through cooler and grind modification, gypsum particle is modified as fibrous building gypsum plaster, the building gypsum plaster of producing is stored into finished bin.
The present invention adopts single stage method to produce building gypsum plaster, and process stabilizing is simple to operate, can realize long-term, continuous production.
Embodiment
Embodiment: the equipment of present embodiment has source material delivery system, material calcining system, cooling grinding system, finished product materials to carry stocking system, process air system, steam system, dust-removal system.
1, source material delivery system
The purpose that raw material is carried is transported to the calcining machine with material from the desulfurated plaster storehouse exactly, and the viscosity ratio of desulfurated plaster is bigger, phenomenons such as putty, Peng's material, seize in course of conveying, often occur, and the system that makes can't move continuously.
2, material calcining system
Calcination system is the important step in the whole process of production.Material very easily sticks in calcination process on barrel and the heat exchange tube wall, and along with the propelling of calcining process, the material that sticks on the wall very easily scabs, thereby has a strong impact on the thermo-efficiency of calcining machine and the quality of calcination product.This link has been done following measure in the structure aspects of calcining machine.
A) the roasting assembly leading portion adopts double-spiral structure, can clear up each other between the twin shaft like this, can effectively prevent the seize phenomenon of viscous material.The top of charging simultaneously is provided with a kind of broken arch mechanism, prevents the generation of wet stock arch formation, and the assurance system feeding is smooth and easy.
B) the calcining machine is a steam indirect heat exchange rotary calciner, and thermal source is a superheated vapour, and steam is walked tube side in rotary kiln device inside; Desulfurated plaster is walked shell side at device interior, carries out indirect heat transfer, in the rotation process of rotary kiln; Material is constantly kicked up and is scattered, and carries out sufficient heat exchange.In heat transfer process, drying is fallen the surface water in the desulfurated plaster, and sloughs a hypocrystalline water, promptly processes building gypsum plaster.
C) drying machine discharging cover external form is gradual-enlargement type, can reduce humidity discharging gas-entrained product like this and get into dust collecting system, reduces the burden of dust collecting system.
3, cooling grinding system
A) because the temperature of the finished product materials that the calcining machine comes out is very high, reach more than 130 ℃, be not suitable for follow-up grinding and storage, so need cool off to it.Cooler inside is the rotary disk form of tubes, and material cools off within it indirectly, and it is inner that wind is walked pipe, and material is walked pipe shell and cooled off.
B) cooled finished product materials gets into the modification mill, is fibrous with the granule modified of calcium sulphate hemihydrate, increases its resistance to compression, flexural capacity, improves the gesso quality.
4, finished product materials is carried stocking system
Gesso after cooling is ground is finished product, and this part is established 3 600m
3The finished product storage bin is used to store terra alba.At the warehouse top fly-ash separator and blower fan are set, for finished bin is carried out dedusting packed the time.
5, process air part
The point of beginning of the process air in the native system is the cooling air blast inlet of cooler, and after this cooling air cooled off material, temperature reached 60-80 ℃; Be heated to 100-120 ℃ through interchanger; Get into the calcining machine then, take away, carry out dedusting through the calcining sack cleaner again calcining the moisture that is produced in the calcining machine; The AT that gets into this cloth bag reaches 150-160 ℃, takes away emptying by the calcining induced draft fan at last.
This part calcining cloth bag needs to adopt three anti-filter bags, to reduce the turnover rate of filter bag because EAT is very high.Because the regain of process air is very high, need adopt antirust blower fan to the calcining induced draft fan.
6, vapor portion
Native system adopts superheated vapour as the incinerating thermal source, and pressure is greater than 1.6Mpa.Each is put used steam with vapour and is pooled to the condensation water pot through drain valve, directly gets into pipeline and reclaims use, and this cyclic utilization system reaches the effect of energy-saving and emission-reduction.Steam pipeline heat-insulation adopts the structure of aluminum silicate fiber+rock wool, and the average working relative humidity of insulation back pipe section shell is not higher than (envrionment temperature+10 ℃).
7, dust removal part
Handling in the line main airborne dust point and be handling equipments such as calcining machine, modification mill, storage bin, lift etc. locates.Dust-removal system is on the airtight basis of processing unit, each airborne dust point to be carried out exhausting, and each airborne dust point is worked under negative pressure state, avoids dust to escape, and the dust laden air of each dust sucting point empties to outdoor after purifying treatment.Thereby make its emission concentration be lower than 50mg/N
3, the dust concentration on the shopwork post is at 5mg/N
3Below, meet environmental protection and industry hygiene standard requirement fully.Gypsum dust major part under collecting can flow back in the native system explained hereafter equipment automatically, avoids reentrainment of dust.
The characteristic of terra alba is to be prone to suction.Heat release voluntarily in general processing, storage process, absorb water, become damp, be clamminess, situation is even more serious during calcined dehydration.To above characteristic, the fly-ash separator of calcining machine selects for use the high temperature resistive connection to reveal the sack cleaner of filtrate.It is strong that this kind filtrate resistive connection reveals performance, and good permeability, ultrafine powder, fibrous dust all are difficult for seeing through.
Sulphur gypsum of the present invention is processed gesso behind calcined dehydration, handle the line energy-conserving and environment-protective, and production technique is simple, and equipment is stablized easy to operate, has realized the comprehensive utilization of resource.
Claims (1)
1. a desulfurated plaster utilizes method again; It is characterized in that it comprises that raw material conveying, material calcining, cooling grinding, finished product materials conveying store four process procedures;---wet feed storehouse---weighing belt---duplex feeding machine is delivered to indirect internal heat type rotary kiln and calcines, and calcining temperature is 120-160 ℃ through belt to be about to desulfurated plaster; Deliver to the modification ball mill after the finished product materials that the calcining machine comes out forces to be cooled to 60-80 ℃ through cooler and grind modification, gypsum particle is modified as fibrous building gypsum plaster, the building gypsum plaster of producing is stored into finished bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101144167A CN102659330A (en) | 2012-04-18 | 2012-04-18 | Desulfurization gypsum recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101144167A CN102659330A (en) | 2012-04-18 | 2012-04-18 | Desulfurization gypsum recycling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102659330A true CN102659330A (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101144167A Pending CN102659330A (en) | 2012-04-18 | 2012-04-18 | Desulfurization gypsum recycling method |
Country Status (1)
| Country | Link |
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| CN (1) | CN102659330A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384372A (en) * | 2015-11-27 | 2016-03-09 | 山东先罗输送机械有限公司 | Method and device for preparing building gypsum from desulfurized gypsum |
| CN105417975A (en) * | 2015-10-14 | 2016-03-23 | 王慧 | Technique for preparing building gypsum from desulfurized gypsum |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597147A (en) * | 2009-07-06 | 2009-12-09 | 贵州安捷能建筑材料发展有限公司 | The processing method of a kind of phosphogypsum, desulphurization gypsum for preparing high strength plaster of Paris |
| CN102249578A (en) * | 2011-05-06 | 2011-11-23 | 上海市建筑科学研究院(集团)有限公司 | Preparation method of desulfurized building gypsum for powder gypsum mortar |
| EP2418184A2 (en) * | 2010-08-12 | 2012-02-15 | Lindner GFT GmbH | Method for manufacturing alpha-calcium sulphate hemi-hydrate |
-
2012
- 2012-04-18 CN CN2012101144167A patent/CN102659330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597147A (en) * | 2009-07-06 | 2009-12-09 | 贵州安捷能建筑材料发展有限公司 | The processing method of a kind of phosphogypsum, desulphurization gypsum for preparing high strength plaster of Paris |
| EP2418184A2 (en) * | 2010-08-12 | 2012-02-15 | Lindner GFT GmbH | Method for manufacturing alpha-calcium sulphate hemi-hydrate |
| CN102249578A (en) * | 2011-05-06 | 2011-11-23 | 上海市建筑科学研究院(集团)有限公司 | Preparation method of desulfurized building gypsum for powder gypsum mortar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417975A (en) * | 2015-10-14 | 2016-03-23 | 王慧 | Technique for preparing building gypsum from desulfurized gypsum |
| CN105384372A (en) * | 2015-11-27 | 2016-03-09 | 山东先罗输送机械有限公司 | Method and device for preparing building gypsum from desulfurized gypsum |
| CN105384372B (en) * | 2015-11-27 | 2018-09-28 | 山东先罗输送机械有限公司 | Method and device for preparing building gypsum from desulfurized gypsum |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20120912 |