CN101508453A - Process for producing hydrated lime by using acetylene sludge - Google Patents
Process for producing hydrated lime by using acetylene sludge Download PDFInfo
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- CN101508453A CN101508453A CNA2009100643522A CN200910064352A CN101508453A CN 101508453 A CN101508453 A CN 101508453A CN A2009100643522 A CNA2009100643522 A CN A2009100643522A CN 200910064352 A CN200910064352 A CN 200910064352A CN 101508453 A CN101508453 A CN 101508453A
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Abstract
The invention belongs to the technical field of acetylene sludge application and the technical field of production process of calcium hydroxide, in particular to a production process for preparing the calcium hydroxide by the acetylene sludge. The production process comprises the following steps that: the acetylene sludge material is subjected to screening, impurity removing and dehydrating, and is dried; and after the dried material is separated and collected, a finished product of the calcium hydroxide is prepared. Drying is separated into primary drying and secondary drying to be carried out in sequence. Furthermore, the temperature of the primary drying is between 50 and 150 DEG C, and time is between 10 and 40 hours; and the temperature of the secondary drying is between 200 and 600 DEG C, and time is between 1 and 5 seconds. The process has the advantages of simple production process, low production cost, changes waste into valuable, realizes reasonable utilization of wastes, and has wide market prospect and considerable economic benefit.
Description
Technical field
The invention belongs to the applied technical field of carbide slag, belong to the technical field of producing of calcium hydroxide simultaneously, be specifically related to a kind of production technique of utilizing carbide slag to prepare calcium hydroxide.
Background technology
Acetylene (C
2H
2) be one of important source material of basic organic synthesis industry, with calcium carbide (CaC
2) be raw material, the technology that adds water (wet method) production acetylene is simply ripe, and year industrial history surplus in the of existing 60 still accounts for larger specific gravity in China at present so far.The 1t calcium carbide adds water can generate the acetylene gas of kg more than 300, generates the industrial effluent of 1.5～2t solid content about 12% simultaneously, is commonly called as carbide slag slurries.Acetylene is the main raw material of producing polyvinyl chloride, polyvinyl chloride (PVC) RESINS (PVC), press knowhow, every production 1t PVC product consumes calcium carbide 1.5～1.6t, simultaneously every t calcium carbide produces 1.2t carbide slag (butt), the carbide slag water content is by 90%, so every production 1tPVC product is discharged the about 20t of carbide slag slurries.This shows that the generation of carbide slag slurries has substantially exceeded the output of PVC.Most of PVC manufacturer with carbide slag slurries after gravity settling separation, the supernatant liquor recycle; Carbide slag is through further dehydration, and its water ratio still reaches 40%～50%, is starchiness, and easy to leak pollutes the road surface in transit, and long-term accumulation not only takies a large amount of soils, and there is serious erosion action in the soil.For a long time, this trade waste of this carbide slag fails effectively to be utilized and administer, and has so not only caused environmental pollution but also has wasted resource.
Calcium hydroxide, molecular formula are Ca (OH)
2Calcium hydroxide is the Chemicals of widespread use, and basic purposes is as follows: (1) environmental protection neutralizing agent: being used for acid waste water, sewage disposal, boiler flue gas desulfurization, is in the generally acknowledged first-selected alkalescence in the whole world and medicament; (2) industrial chemicals, additive, auxiliary agent, filler process hides, metallurgy, coating, petroleum oil, papermaking, food, medicine, feed etc.; (3) other purposes: stone material helps and cuts agent, soil stabilizer, concrete adjusting material, chemical reagent, plasterboard filleting condensing agent, building adhesive batching, and alkylsulphonic acid calcium, medicine end sour agent, astringent matter, Ethylene Diaminetetra Acetic Acid, plastic optical fibre etc.Traditional lime slaking legal system be equipped with calcium hydroxide be with Wingdale after calcining kiln is sintered into calcium oxide, with selected, add water digestion, again through purify, dry and sieve, the calcium hydroxide product.Its reaction formula is as follows: CaCO
3=CaO+CO
2CaO+H
2O=Ca (OH)
2Technical process: Wingdale, coke → roasting → selected → add water digestion → precipitation → separation → drying → sieve → pack → calcium hydroxide.
Prepare calcium hydroxide if can make full use of industrial waste carbide slag, turn waste into wealth beyond doubt, in the protection environment, also realized economic Sustainable development.
Summary of the invention
For overcoming the deficiencies in the prior art part, purpose of the present invention be exactly to provide a kind of production technique simple, be raw material with the industrial waste carbide slag, the production technique of preparation calcium hydroxide.
For achieving the above object, the technical scheme that the present invention takes is as follows: a kind of production technique of utilizing carbide slag to prepare calcium hydroxide: at first the carbide slag material is sieved removal of impurities, dehydration, carry out drying then; Dried material promptly gets the calcium hydroxide finished product after separated and collected.
Preferably, described drying is carried out one-level drying and secondary drying in two steps successively.
Further, described one-level exsiccant temperature is 50～150 ℃, and the time is 8～30h; The temperature of secondary drying is 200～600 ℃, and the time is 1～5s.
Further, the media of described one-level drying, secondary drying is hot flue gas, and after the firsts and seconds drying, all mixed hot flue gas of material is proceeded corresponding next procedure together.
Further, one-level is dry dries indirectly for hot flue gas; Secondary drying is that hot flue gas is directly dried, and the hot flue gas of secondary drying is from calcining furnace, electric furnace or hotblast stove; Behind the secondary drying, the mixed hot flue gas of material carries out separated and collected, and the waste heat flue gas of gained returns and is used for the one-level drying.
Further, the one-level drying is carried out in pre-treatment workshop or drying machine, and the pre-treatment workshop is three closeds, only stays import and export; Secondary drying carries out in the drying machine of fully-closed state.
Further, being used for one-level exsiccant drying machine is tumble dryer or paddle-dryer.
Further, the drying machine that is used for secondary drying is pneumatic drier or flash dryer.
Further, the pneumatic drier or the flash dryer that are used for secondary drying are provided with feeding section, and feeding section is provided with material again and breaks up device.
Further, material enters from the middle part of pneumatic drier or flash dryer, hot flue gas is entered and is formed the hot gas flow of high speed rotating in pneumatic drier or flash dryer by the bottom, broken up material and hot gas flow formation suspension fluidization campaign that the device brute force is broken up, moment is finished the caloic exchange.
Be equipped with the calcium hydroxide prior art with traditional lime slaking legal system and compare, production technique of the present invention is simple, and production cost is low, turns waste into wealth, and has realized reasonable utilization of wastes, has extensive market prospects, and economic benefit is considerable.
Description of drawings
Fig. 1: the technological process of production figure of hot flue gas in the embodiment of the invention 1;
Fig. 2: the technological process of production figure that utilizes carbide slag to prepare calcium hydroxide of the present invention.
Embodiment
Below the present invention is described in further detail in conjunction with the accompanying drawings with specific embodiment, but protection scope of the present invention is not limited thereto:
Embodiment 1
The technological process of production figure of hot flue gas as shown in Figure 1, hot flue gas is specially from calcining furnace: engineering adopts two stage type gas generating furnace, the coal gas that produces enters water wash column after cyclone dust removal, electrically trapped tar oil, after washing, feed calcining furnace in the production plant, for production provides hot flue gas.Mix carbide slag in the engineering employing coal and carry out desulfurization, calcium sulfur ratio (weight) is 1:5, and desulfuration efficiency is about more than 60%.
The carbide slag that utilizes as shown in Figure 2 prepares the technological process of production figure of calcium hydroxide: owing to contain a large amount of impurity in the carbide slag, the broad particle distribution of impurity, not easily separated, enter settling tank at carbide slag and advance into screening plants such as wet cyclone or vibratory screening apparatus and carry out removal of impurities, afterwards filter-press dehydration.Carbide slag carries out the one-level drying in the pre-treatment workshop subsequently.Three closeds are adopted in the pre-treatment workshop, only stay import and export, and ground has 50 pipelines.The hot flue gas that secondary drying is discharged feeds in the subterranean pipeline in pre-treatment workshop, utilizes waste heat to carry out the preliminary one-level drying of carbide slag.Hot flue-gas temperature is 120 ℃, dry 15h.Process one-level exsiccant carbide slag is delivered to by underground rotary conveyor and carries out secondary drying in the pneumatic drier.Pneumatic drier is high about 14 meters, and material enters from the pneumatic drier middle part, is entered by the bottom from the hot flue gas of calcining furnace, directly contacts with material and carries out drying.Pneumatic drier is provided with feeding section, and feeding section is provided with again breaks up device.Pneumatic drier is worked under the fully-closed state.Hot flue-gas temperature is 450 ℃, dry 3s.Hot flue gas forms the hot gas flow of high speed rotating in pneumatic drier or flash dryer, broken up material and hot gas flow formation suspension fluidization campaign that the device brute force is broken up, and moment is finished the caloic exchange.Dried material adopts cyclonic separator and sack cleaner to collect, and waste heat flue gas is used for the one-level drying through pipe-line transportation to the subterranean pipeline in pre-treatment workshop.Material need not grinding, and 95～98% material particles degree is below 50 microns, delivers to feed bin by worm conveyor, chapelet and stores, and the calcium hydroxide finished product that wrapping machine is packaged as bag shape dispatches from the factory.
Embodiment 2
One-level exsiccant temperature is 50 ℃, and the time is 30h; The hot flue gas of secondary drying is from electric furnace (method that electric furnace produces hot flue gas is an ordinary method, and its technological process of production figure slightly), and the temperature of secondary drying is 200 ℃, and the time is 5s; The one-level drying is carried out in tumble dryer; The secondary drying machine is selected flash dryer for use, flash dryer is provided with feeding section equally, feeding section is provided with breaks up device, flash dryer is worked under the fully-closed state equally, high about 3～8 meters of flash dryer, hot flue gas is entered by the bottom, forms the hot gas flow of high speed rotating in flash dryer, hot gas flow and quilt are broken up the material material formation suspension fluidization campaign that the device brute force is broken up, and moment is finished the caloic exchange.Other each operation and the equipment that adopted are all with embodiment 1.
Embodiment 3
One-level exsiccant temperature is 150 ℃, and the time is 8h; The hot flue gas of secondary drying is from hotblast stove (method that hotblast stove produces hot flue gas is an ordinary method, and its technological process of production figure slightly), and the temperature of secondary drying is 600 ℃, and the time is 1s; The one-level drying is carried out in paddle-dryer; Other each operation and the equipment that adopted are all with embodiment 1.
Claims (10)
1. a production technique of utilizing carbide slag to prepare calcium hydroxide is characterized in that: at first the carbide slag material is sieved removal of impurities, dehydration, carry out drying then; Dried material promptly gets the calcium hydroxide finished product after separated and collected.
2. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 1 is characterized in that: described drying is carried out one-level drying and secondary drying in two steps successively.
3. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 2 is characterized in that: described one-level exsiccant temperature is 50～150 ℃, and the time is 8～30h; The temperature of secondary drying is 200～600 ℃, and the time is 1～5s.
4. as claim 2 or the 3 described production technique of utilizing carbide slag to prepare calcium hydroxide, it is characterized in that: the media of described one-level drying, secondary drying is hot flue gas, after the firsts and seconds drying, all mixed hot flue gas of material is proceeded corresponding next procedure together.
5. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 4 is characterized in that: one-level is dry dries indirectly for hot flue gas; Secondary drying is that hot flue gas is directly dried, and the hot flue gas of secondary drying is from calcining furnace, electric furnace or hotblast stove; Behind the secondary drying, the mixed hot flue gas of material carries out separated and collected, and the waste heat flue gas of gained returns and is used for the one-level drying.
6. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 5 is characterized in that: the one-level drying is carried out in pre-treatment workshop or drying machine, and the pre-treatment workshop is three closeds, only stays import and export; Secondary drying carries out in the drying machine of fully-closed state.
7. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 6 is characterized in that: being used for one-level exsiccant drying machine is tumble dryer or paddle-dryer.
8. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 6 is characterized in that: the drying machine that is used for secondary drying is pneumatic drier or flash dryer.
9. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 8 is characterized in that: the pneumatic drier or the flash dryer that are used for secondary drying are provided with feeding section, and feeding section is provided with material again and breaks up device.
10. the production technique of utilizing carbide slag to prepare calcium hydroxide as claimed in claim 9, it is characterized in that: material enters from the middle part of pneumatic drier or flash dryer, hot flue gas is entered and is formed the hot gas flow of high speed rotating in pneumatic drier or flash dryer by the bottom, broken up material and hot gas flow formation suspension fluidization campaign that the device brute force is broken up, moment is finished the caloic exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100643522A CN101508453B (en) | 2009-03-09 | 2009-03-09 | Process for producing hydrated lime by using acetylene sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100643522A CN101508453B (en) | 2009-03-09 | 2009-03-09 | Process for producing hydrated lime by using acetylene sludge |
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| CN101508453A true CN101508453A (en) | 2009-08-19 |
| CN101508453B CN101508453B (en) | 2011-06-08 |
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| CN2009100643522A Expired - Fee Related CN101508453B (en) | 2009-03-09 | 2009-03-09 | Process for producing hydrated lime by using acetylene sludge |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Apparatus and method for preparing high-activity calcium hydroxide by using carbide slag alkali residue |
| CN103466674A (en) * | 2013-09-12 | 2013-12-25 | 桂林市红星化工有限责任公司 | Preparation method of food-grade calcium hydroxide |
| CN103880056A (en) * | 2014-02-26 | 2014-06-25 | 钟文庭 | Preparation method for preparing calcium hydroxide through carbide slag |
| CN107188191A (en) * | 2017-06-30 | 2017-09-22 | 常州瑞坦商贸有限公司 | A kind of preparation method of tobermorite |
| CN107824431A (en) * | 2017-11-28 | 2018-03-23 | 新疆国峰嘉和环保科技有限公司 | A kind of method of wet method carbide slag screening removal of impurities |
| CN108046302A (en) * | 2017-11-28 | 2018-05-18 | 新疆国峰嘉和环保科技有限公司 | A kind of method that carbide slag produces high-purity white lime |
| CN109650429A (en) * | 2019-02-21 | 2019-04-19 | 新疆德安环保科技股份有限公司 | A kind of carbide slag recycling treatment process |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN112456619A (en) * | 2020-10-13 | 2021-03-09 | 新疆中泰化学股份有限公司 | Method and device for producing water treatment regulator by using carbide slag |
| CN115286265A (en) * | 2022-08-05 | 2022-11-04 | 廖怀武 | Production method for producing calcium hydroxide by using waste carbide slag |
| CN115521099A (en) * | 2022-10-24 | 2022-12-27 | 上海百奥恒新材料有限公司 | Composition for preparing geopolymer artificial fish reef, method for preparing geopolymer artificial fish reef, and geopolymer artificial fish reef |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1016538B (en) * | 1989-04-06 | 1992-05-06 | 中国农业机械化科学研究院 | Energy saving two-stage drying technology process |
| CN1260160C (en) * | 2004-10-10 | 2006-06-21 | 王宝林 | Carbide slag drying method |
| CN1696594A (en) * | 2005-06-02 | 2005-11-16 | 山东天力干燥设备有限公司 | Technique for drying adhesional wetting materiel |
| CN101157471B (en) * | 2007-09-29 | 2010-12-01 | 株洲化工集团诚信有限公司 | Method and device for producing calcium lime by carbide slag |
-
2009
- 2009-03-09 CN CN2009100643522A patent/CN101508453B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Apparatus and method for preparing high-activity calcium hydroxide by using carbide slag alkali residue |
| CN103466674A (en) * | 2013-09-12 | 2013-12-25 | 桂林市红星化工有限责任公司 | Preparation method of food-grade calcium hydroxide |
| CN103880056A (en) * | 2014-02-26 | 2014-06-25 | 钟文庭 | Preparation method for preparing calcium hydroxide through carbide slag |
| CN103880056B (en) * | 2014-02-26 | 2016-03-02 | 钟文庭 | A kind of carbide slag prepares the preparation method of calcium hydroxide |
| CN107188191A (en) * | 2017-06-30 | 2017-09-22 | 常州瑞坦商贸有限公司 | A kind of preparation method of tobermorite |
| CN108046302A (en) * | 2017-11-28 | 2018-05-18 | 新疆国峰嘉和环保科技有限公司 | A kind of method that carbide slag produces high-purity white lime |
| CN107824431A (en) * | 2017-11-28 | 2018-03-23 | 新疆国峰嘉和环保科技有限公司 | A kind of method of wet method carbide slag screening removal of impurities |
| CN108046302B (en) * | 2017-11-28 | 2020-02-04 | 新疆国峰嘉和环保科技有限公司 | Method for producing high-purity hydrated lime from carbide slag |
| CN109650429A (en) * | 2019-02-21 | 2019-04-19 | 新疆德安环保科技股份有限公司 | A kind of carbide slag recycling treatment process |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN111717916B (en) * | 2020-06-03 | 2024-04-12 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing active calcium oxide as calcium carbide raw material by wet method calcium carbide slag |
| CN112456619A (en) * | 2020-10-13 | 2021-03-09 | 新疆中泰化学股份有限公司 | Method and device for producing water treatment regulator by using carbide slag |
| CN115286265A (en) * | 2022-08-05 | 2022-11-04 | 廖怀武 | Production method for producing calcium hydroxide by using waste carbide slag |
| CN115521099A (en) * | 2022-10-24 | 2022-12-27 | 上海百奥恒新材料有限公司 | Composition for preparing geopolymer artificial fish reef, method for preparing geopolymer artificial fish reef, and geopolymer artificial fish reef |
| CN115521099B (en) * | 2022-10-24 | 2023-08-01 | 上海百奥恒新材料有限公司 | Composition for preparing geopolymer artificial fish reef, method for preparing geopolymer artificial fish reef and geopolymer artificial fish reef |
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| CN101508453B (en) | 2011-06-08 |
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