CN101481225A - Predrying method for carbide slag - Google Patents
Predrying method for carbide slag Download PDFInfo
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- CN101481225A CN101481225A CNA2009101161512A CN200910116151A CN101481225A CN 101481225 A CN101481225 A CN 101481225A CN A2009101161512 A CNA2009101161512 A CN A2009101161512A CN 200910116151 A CN200910116151 A CN 200910116151A CN 101481225 A CN101481225 A CN 101481225A
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- carbide slag
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- calcium carbide
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Abstract
The invention discloses a method for predrying calcium carbide. Wet-discharged calcium carbide slag with the water content of 90 percent is pumped into a concentration pool, the water content of the slurry of the concentrated calcium carbide is from 75 percent to 85 percent, and the calcium carbide is pumped into a filter press to be pressed and filtered to a material cake with the water content of 32 percent to 38 percent; the material cake with the water content of 32 percent to 38 percent is sent into a revolving drier to instantly exchange heat with the hot smoke at the high temperature from 900 DEG C to 1000 DEG C; after the material cake enters the revolving drier and under the action of a lifting board and a stirring chain arranged in a cylinder wall, the water of the material cake is rapidly dried and vaporized with the final water content of 12 percent to 18 percent. The invention solves the problems of inaccurate material mixing, storage, conveyance and insufficient drying performance of a raw material mill of the wet-discharged calcium carbide.
Description
Technical field
The present invention relates to a kind of prebake method of wet carbide slag.
Background technology
The patent No. provides a kind of carbide slag drying method for the patent of invention of CN200410072311.5, will send in the pulverizer through the raw material conveying belt through the carbide slag after the first dehydration and pulverize the Calcium Carbide Ash charging feed lift after the pulverizing; Send into oven dry in the drying plant, generally controlling moisture content is that 0.1 to 10% warehouse-in is stand-by.There is following shortcoming in this method: (1), whole complex technical process, and equipment is many, the failure rate height, operation factor is low.(2), use stoving oven, sticking easily stifled, thermo-efficiency is low, yields poorly; The control moisture content is 0.1 to 10%, the energy consumption height.(3), send in the pulverizer through the raw material conveying belt through the carbide slag after the first dehydration and to pulverize, do not have metering outfit, sticking easily stifled equipment.(4), oven dry equipment waste gas takes off dirt by fly-ash separator and handles, and do not have concrete fly-ash separator scheme, exhaust gas emission is difficult to reach national requirements for environmental protection, easily environment is caused secondary pollution.
Summary of the invention
The purpose of this invention is to provide and a kind of carbide slag is carried out the prebake method, technological process is simple, and material is not easy sticking stifled, and waste gas takes off dirt to be handled.
Technical scheme provided by the invention is as follows:
Carbide slag is carried out the prebake method, and order is carried out according to following steps:
1), will contain moisture 90% wet discharging carbide slag slag stock pump and go into concentration basin, carbide slag slurries moisture pumps into pressure filter 75～85% after concentrating, and press filtration becomes to contain moisture 32～38% material cakes;
2), will contain moisture 32～38% material cakes sends into the elevated temperature heat flue gas of moment in the rotary dryer and 900～1000 ℃ and carries out heat exchange;
3), after the material cake enters rotary dryer, under the effect of material delivering plate that in the rotary dryer barrel, is provided with and stirring chain, carbide slag kicked up seethe, dry rapidly evaporation, the whole water content of carbide slag is 12～18%, oven dry gas reaches emission request after handling through fly-ash separator.
As a further improvement on the present invention, described fly-ash separator is the glass fibre bag filtrate, and design wind speed is less than 0.5m/min.
As a further improvement on the present invention, rotary dryer is sent in described material cake metering.
After adopting method of the present invention, material delivering plate that is provided with in barrel and stirring chain significantly reduce carbide slag and adhere to cylindrical shell and pile up putty, owing to can also prevent sticking stifled cylindrical shell of carbide slag and material delivering plate, realize that the method for " undressing " layer by layer makes its drying rapidly, tail gas also passes through dust removal process.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Embodiment 1
Referring to accompanying drawing, 1, rotary conveyor 2, underflow pump 3, drawing-in device 4, speed governing coal feeder 5, Pulverized Coal Bin 6, explosion-proof bag collector 7, vertical hammer crusher 8, lift 9, gas blower 10, fluidizing furnace 11, spring steel plate sealing 12, enhanced water evaporation device 13, built-up type material delivering plate 14, rotary drying machine 15, mechanical seal 16, air valve 17, resistive connection reveals bag collector 18, rotary conveyor 19, resistive connection reveals bag collector 20, lift 21, carbide slag storehouse 22, resistive connection reveals bag collector 23, scraper conveyor 24, gas-operated lock air-valve 25, boiler centrifugal induced draught fan 26, the thick glass filter cloth 27 of CWF500, glass fibre bag filtrate fly-ash separator 28,0 degree ash bucket, electric heater unit and vibration body 29, fly-ash separator
Design fluidizing furnace 10 is as the oven dry thermal source, and fuel uses the low grade coal of 3500kcal, and low grade coal is sent into Pulverized Coal Bin 5 through vertical hammer crusher 7, lift 8.Coal dust is quantitatively sent into fluidizing furnace 10 burnings through speed governing coal feeder 4,900～1000 ℃ of oven dry thermals source is provided for following current rotary dryer 14.Explosion-proof bag collector 6 is collected Pulverized Coal Bin 5 coal dusts.
Containing moisture 90% carbide slag slurries pumps in the concentration basin, carbide slag slurries moisture is 75～85% after sedimentation concentrates, pump into pressure filter, press filtration becomes to contain moisture 32～38% material cakes, send into carbide slag prebake equipment by rotary conveyor 1, underflow pump 2 meterings, send in the following current rotary dryer 14 through drawing-in device 11, moment, rapid elevated temperature heat flue gas with 900～1000 ℃ carried out heat exchange, significantly reduced carbide slag and adhered to cylindrical shell and pile up putty.Under the effect of enhanced water evaporation device 12, realize that the method for " undressing " layer by layer makes it dry rapidly; Under the effect of multistage combined material delivering plate 13, carbide slag radially is " waterfall " shape in dryer, being " wave " shape vertically wriggles forward, improved carbide slag and hot blast the way of contact and effect effectively in dryer 14 inside, avoided appearance " wind-tunnel " to cause the hot blast short circuit, carbide slag can be kicked up fully, and can make itself and hot flue gas carry out sufficient heat exchange to greatest extent.Design spring steel plate sealing 11 between dryer 14 and the fluidizing furnace 10, design mechanical seal 15 between dryer 14 and the discharging cover.The whole moisture controlled of carbide slag prebake is 12～18%, and the carbide slag after the prebake is sent into carbide slag storage vault 21 through air valve 16, rotary conveyor 18, lift 20.Airborne dust point design resistive connection reveals bag collector 17,19 and gathers dust, and carbide slag storage vault design resistive connection reveals bag collector 22 and gathers dust.Reach national requirements for environmental protection after 27 dedustings of oven dry gas process glass fibre bag filtrate fly-ash separator, by 25 dischargings of boiler centrifugal induced draught fan.Glass fibre bag filtrate fly-ash separator design air intake mode 29, the thick glass filter cloth 26 of CWF500 are as filtrate, 70 degree ash bucket, electric heater unit and vibration bodies 28, reduce device interior and ash bucket dust stratification, improve the stripping performance of filtrate, guarantee that equipment resistance remains on less than 1200Pa.Rotproofing has been done in apparatus body inside.Gas-operated lock air-valve 24 is unloaded ash once, continuously change into and intermittently unload ash, minimizing equipment leaks out.Collected ash is sent into carbide slag storage vault 21 through scraper conveyor 23, rotary conveyor 18, lift 20.
Claims (3)
1. one kind is carried out the prebake method to carbide slag, it is characterized in that, order is carried out according to following steps:
1), will contain moisture 90% wet discharging carbide slag slag stock pump and go into concentration basin, carbide slag slurries moisture pumps into pressure filter 75～85% after concentrating, and press filtration becomes to contain moisture 32～38% material cakes;
2), will contain moisture 32～38% material cakes sends into the elevated temperature heat flue gas of moment in the rotary dryer and 900～1000 ℃ and carries out heat exchange;
3), after the material cake enters rotary dryer, under the effect of material delivering plate that in the rotary dryer barrel, is provided with and stirring chain, carbide slag kicked up seethe, dry rapidly evaporation, the whole water content of carbide slag is 12～18%, oven dry gas reaches emission request after handling through fly-ash separator.
2. according to claim 1 carbide slag is carried out the prebake method, it is characterized in that: described fly-ash separator is the glass fibre bag filtrate, and design wind speed is less than 0.5m/min.
3. according to claim 1 carbide slag is carried out the prebake method, it is characterized in that: rotary dryer is sent in described material cake metering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101161512A CN101481225A (en) | 2009-01-31 | 2009-01-31 | Predrying method for carbide slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101161512A CN101481225A (en) | 2009-01-31 | 2009-01-31 | Predrying method for carbide slag |
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| CN101481225A true CN101481225A (en) | 2009-07-15 |
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| CNA2009101161512A Pending CN101481225A (en) | 2009-01-31 | 2009-01-31 | Predrying method for carbide slag |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175074A (en) * | 2010-11-30 | 2011-09-07 | 李柏荣 | Lignitic coal modifying processing system and technology |
| CN102381848A (en) * | 2011-07-25 | 2012-03-21 | 黄石市建材节能设备总厂 | Efficient direct-heating gypsum calcination rotary kiln |
| CN103813989A (en) * | 2011-10-19 | 2014-05-21 | 电气化学工业株式会社 | Process for dewatering slurry |
| WO2016201665A1 (en) * | 2015-06-18 | 2016-12-22 | 张甘霖 | Rotary drying device |
| CN106352678A (en) * | 2016-11-17 | 2017-01-25 | 中冶华天工程技术有限公司 | Drying method and device for steel slag tailings |
| CN106630706A (en) * | 2015-10-28 | 2017-05-10 | 南京凯盛国际工程有限公司 | A method of preparing a cement raw material from a viscous-wet type calcium material |
| CN109114916A (en) * | 2018-10-23 | 2019-01-01 | 郑州鼎力新能源技术有限公司 | Coco bran stoving process and equipment |
| CN109237483A (en) * | 2018-08-03 | 2019-01-18 | 合肥水泥研究设计院有限公司 | A kind of high humidity light material drying system |
| CN109609188A (en) * | 2018-11-27 | 2019-04-12 | 中国成达工程有限公司 | Wet process acetylene calcium carbide residues processing technique |
| CN113720109A (en) * | 2021-08-09 | 2021-11-30 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN115031517A (en) * | 2021-12-31 | 2022-09-09 | 安徽华塑股份有限公司 | Carbide slag low-cost cyclic utilization equipment in acetylene production |
| CN115446075A (en) * | 2022-09-13 | 2022-12-09 | 山西中瑞瑞恒建材有限公司 | Carbide slag slurry treatment system and treatment process |
-
2009
- 2009-01-31 CN CNA2009101161512A patent/CN101481225A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175074A (en) * | 2010-11-30 | 2011-09-07 | 李柏荣 | Lignitic coal modifying processing system and technology |
| CN102381848A (en) * | 2011-07-25 | 2012-03-21 | 黄石市建材节能设备总厂 | Efficient direct-heating gypsum calcination rotary kiln |
| CN103813989A (en) * | 2011-10-19 | 2014-05-21 | 电气化学工业株式会社 | Process for dewatering slurry |
| CN103813989B (en) * | 2011-10-19 | 2016-01-20 | 电化株式会社 | The dewatering of mud |
| WO2016201665A1 (en) * | 2015-06-18 | 2016-12-22 | 张甘霖 | Rotary drying device |
| CN106630706A (en) * | 2015-10-28 | 2017-05-10 | 南京凯盛国际工程有限公司 | A method of preparing a cement raw material from a viscous-wet type calcium material |
| CN106630706B (en) * | 2015-10-28 | 2019-04-12 | 南京凯盛国际工程有限公司 | Glue the method that moist calcareous material prepares cement slurry |
| CN106352678A (en) * | 2016-11-17 | 2017-01-25 | 中冶华天工程技术有限公司 | Drying method and device for steel slag tailings |
| CN109237483A (en) * | 2018-08-03 | 2019-01-18 | 合肥水泥研究设计院有限公司 | A kind of high humidity light material drying system |
| CN109114916A (en) * | 2018-10-23 | 2019-01-01 | 郑州鼎力新能源技术有限公司 | Coco bran stoving process and equipment |
| CN109609188A (en) * | 2018-11-27 | 2019-04-12 | 中国成达工程有限公司 | Wet process acetylene calcium carbide residues processing technique |
| CN109609188B (en) * | 2018-11-27 | 2020-04-21 | 中国成达工程有限公司 | Wet acetylene carbide slag treatment process |
| CN113720109A (en) * | 2021-08-09 | 2021-11-30 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN113720109B (en) * | 2021-08-09 | 2022-09-02 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN115031517A (en) * | 2021-12-31 | 2022-09-09 | 安徽华塑股份有限公司 | Carbide slag low-cost cyclic utilization equipment in acetylene production |
| CN115031517B (en) * | 2021-12-31 | 2024-02-20 | 安徽华塑股份有限公司 | Low-cost cyclic utilization equipment of carbide slag in acetylene production |
| CN115446075A (en) * | 2022-09-13 | 2022-12-09 | 山西中瑞瑞恒建材有限公司 | Carbide slag slurry treatment system and treatment process |
| CN115446075B (en) * | 2022-09-13 | 2024-05-17 | 山西中瑞瑞恒建材有限公司 | Carbide slag slurry treatment system and treatment process |
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Application publication date: 20090715 |