CN203229496U - Milled coal drying and conveying device applicable to high-moisture-content coal - Google Patents
Milled coal drying and conveying device applicable to high-moisture-content coal Download PDFInfo
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- CN203229496U CN203229496U CN 201320076226 CN201320076226U CN203229496U CN 203229496 U CN203229496 U CN 203229496U CN 201320076226 CN201320076226 CN 201320076226 CN 201320076226 U CN201320076226 U CN 201320076226U CN 203229496 U CN203229496 U CN 203229496U
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Abstract
The utility model relates to a milled coal drying and conveying device applicable to high-moisture-content coal. The milled coal drying and conveying device is characterized by comprising a raw coal bin, a feeder, a hot-blast stove, a nitrogen distributor, a circulating fan, a mixer, a pre-drier, a coal mill, a dynamic/static separator, a bag-type dust collector, a low-pressure bin, a variable-pressure bin, a feeding bin and a gasification nozzle, wherein the raw coal bin is connected with the feeder; the feeder is connected with an inlet of the pre-drier; inertial hot air at an outlet of the hot-blast stove is divided into two paths which are connected with the drier and the coal mill respectively; the dynamic/static separator is arranged on the coal mill; an outlet of the dynamic/static separator is connected with the dust collector; a gas outlet of the dust collector is connected with the circulating fan; a powder outlet of the dust collector is connected with the low-pressure bin; the low-pressure bin is connected with the variable-pressure bin; and the variable-pressure bin is connected with the feeding bin. The milled coal drying and conveying device is applicable to a wide coal type range, and is particularly applicable to drying and milling of coal such as high-moisture-content brown coal, the particle size distribution and water content of prepared coal powder meet requirements of a gasification furnace, the coal powder is stably and controllably conveyed, and a system is high in safety.
Description
Technical field
The utility model relates to a kind of mill coal drying and carrying method and device, particularly a kind of mill coal drying and e Foerderanlage and method that can be applicable to the high moisture content coal of the coal for the pressurized air flow bed gasification furnace.
Background technology
Air-flow bed coal-gasification since effectively pneumatolytic divide transformation efficiency high, coal high and obtained using widely than the oxygen consumption with than advantages such as coal consumption are low in the world, the air-flow bed coal-gasification technology mainly is divided into powdered coal pressuring gasified and water coal slurry pressure gasification, and typical case's representative of coal gasification has: the single nozzle water wall gasification that two-part bed pulverized coal gasification technology, space flight furnace gasization, GSP gasification, East China University of Science and the Ningbo engineering corporation of China Petrochemical Industry of Shell gasification, Xi'an thermal technology institute develops jointly etc.; Water coal slurry pressure gasification technology typical case representative has: the polynary slurry gasification of the opposed coal water slurry gasification of the multi-nozzle of GE coal water slurry gasification, East China University of Science, Xibei Chemical Inst and the classification oxygen supply coal water slurry gasification of Tsing-Hua University etc.
Entrained flow gasification has specific strict demand to granularity and the water content of coal dust, coal powder size distribution and water content directly have influence on the output of transformation efficiency and the synthetic gas of gasification reaction, therefore how preparing and carry the qualified dry coal powder that is fit to the gasifier bed vapourizing furnace is one of gordian technique of entrained flow gasification, powder process and delivery system are directly connected to energy consumption and the steady running of whole gasification island system, existing powder-making technique, running cost and energy consumption height, be difficult to adapt to low grade coals such as high-moisture brown coal and bituminous coal, pulverized coal preparation system granularity and water content are difficult to reach the requirement of gasification.Chinese patent CN101761933A discloses a kind of utilization and has extracted part stove cigarette as inert media and part drying medium, be mixed into the dry coal dust of coal pulverizer with the hot blast of air preheater outlet, but there are not the hot flue gas of station boiler and the hot blast that air preheater produces in most of coal gasification apparatus, and this method is difficult to guarantee well that the oxygen level of system is lower than prescribed value, has potential safety hazard.
Mill coal drying of the present utility model and e Foerderanlage and method, coal dust adaptability to high-moisture is good, can obtain the dry coal powder of the low and rational size distribution of water content, the dry coal powder enters the vapourizing furnace gasification by e Foerderanlage, dry back coal dust delivers into the vapourizing furnace reaction by coal dust, has improved coal gasification operation stability, reliability and synthesis gas yield significantly.
Summary of the invention
The purpose of this utility model provide a kind of can powder process and the device of conveying, to solve the shortcoming that is difficult to adapt to coal fuel pulverizing plants such as high-moisture brown coal in the existing gasification installation, can obtain that water content is low, the coal dust of rational size distribution is used for gasification reaction.
In order to achieve the above object, the utility model provides a kind of mill coal drying and e Foerderanlage, it is characterized in that, comprise run coal bin, feeding machine, hotblast stove, nitrogen distributor, recirculation blower, mixing tank, predrying device, coal pulverizer, sound attitude separator, sack cleaner, the low pressure storehouse, the transformation storehouse, feed hopper and gasification nozzle, the run coal bin outlet links to each other with the import of feeding machine by pipeline, the outlet of feeding machine links to each other with the coal dust import of predrying device by pipeline, the discharge of predrying device links to each other with the opening for feed of coal pulverizer by pipeline, coal pulverizer is provided with sound attitude separator, sound attitude separator has qualified discharge and defective discharge, defective discharge connects coal pulverizer, qualified discharge connects the coal dust import of sack cleaner by pipeline, the meal outlet of sack cleaner connects the import in low pressure storehouse, the outlet in low pressure storehouse connects the import in transformation storehouse by pipeline, the outlet in transformation storehouse connects the import of feed hopper by pipeline, the outlet of feed hopper connects gasification nozzle by pipeline, hotblast stove is provided with air intlet and fuel inlet and recycle gas import, the outlet of hotblast stove connects first import of mixing tank, second import of mixing tank connects nitrogen distributor, first hot-blast outlet of mixing tank links to each other with predrying device by pipeline, second hot-blast outlet links to each other with the gas feed of coal pulverizer by pipeline, nitrogen distributor also connects sack cleaner, the low pressure storehouse, transformation storehouse and feed hopper, the pneumatic outlet of predrying device connects sack cleaner, the pneumatic outlet of sack cleaner connects recirculation blower, and the outlet of recirculation blower connects the recycle gas import of hotblast stove.
Further, the pneumatic outlet of described sack cleaner also connects blow-off valve.
Further, be connected with pressure equalizing pipe between described transformation storehouse and the feed hopper, pressure-balanced valve is arranged on the pressure equalizing pipe.
Further, the pipeline between described low pressure storehouse and the transformation storehouse and the pipeline between transformation storehouse and the feed hopper are provided with pneumatic ball valve.
The utility model also provides a kind of mill coal drying and carrying method, it is characterized in that, adopts above-mentioned a kind of mill coal drying and e Foerderanlage, and concrete steps are:
Carry out drying in the predrying device with sending into after the metering of the process of the raw coal in run coal bin feeding machine, dried raw coal is fully ground in coal pulverizer, the wind powder mixture that grinds gained separates in sound attitude separator, the isolated underproof coal dust of sound attitude separator returns coal pulverizer to be continued to mill, the isolated gas of sound attitude separator and qualified coal dust and the gas that produces through predrying device and coal dust intermixture enter sack cleaner and finish most gas solid separation, isolated coal dust passes through the low pressure storehouse successively, enter gasification nozzle behind transformation storehouse and the feed hopper, isolated gas major part is returned hotblast stove circulation heating by recirculation blower, small part is by blow-off valve emptying, with the water-content in the regulation system; Air in the hotblast stove and the fuel combustion gas that produces and the nitrogen that comes from nitrogen distributor are mixed to regulate oxygen amount and the temperature of hot blast in mixing tank, mixed hot blast is divided into two-way, wherein one the tunnel enter predrying device for dry raw coal, another road enters coal pulverizer and is used for dry coal dust; Nitrogen in the nitrogen distributor is delivered to sack cleaner as the blowback air of sack cleaner and inertia protection gas, the nitrogen in the nitrogen distributor is delivered to low pressure storehouse, transformation storehouse and feed hopper respectively as protection gas and pressurising and the fluidizing agent of low pressure storehouse, transformation storehouse and feed hopper.
Compared with prior art, the beneficial effects of the utility model are:
1. raw coal arranges predrying device before entering coal pulverizer, and the former moisture content of coal that enters coal pulverizer reduces, and the drying of pulverized coal preparation system is exerted oneself and increased substantially, and the reduction of moisture has improved the calorific value of coal, thereby is conducive to burning and the gasification of coal dust, improves gasification efficiency;
2. owing to adopt warm air drying and sound attitude separator is set in coal mill system, the coal powder size regulation range is big; By warm air drying can dry high-moisture coal, coal dust moisture reduces significantly, is conducive to the conveying of coal dust, hot blast before entering coal pulverizer with nitrogen mixture control oxygen level, the security that is conducive to improve system;
3. utilize the nitrogen in the nitrogen distributor to protect gas as blowback air and the inertia of sack cleaner, nitrogen has effectively guaranteed security and the reliability of whole mill coal drying and delivery system simultaneously as protection gas and pressurising and the fluidizing agent of low pressure storehouse, transformation storehouse and feed hopper; Simultaneously can carry out pressurising and fluidisation to fine coal, be conducive to the conveying of fine coal, prevent bridge formation and the compacting of fine coal in the course of conveying;
4. the mixture of the gas of the gas that produces through predrying device and coal dust intermixture and coal pulverizer outlet and coal dust all enters sack cleaner and carries out gas solid separation, gas returns the hotblast stove recycle through recirculation blower, total system is the negative-pressure sealed system of self-circulation, no dust and coal dust are escaped, environmental friendliness, the security of system performance is good.
Description of drawings
Fig. 1 is mill coal drying of the present utility model and e Foerderanlage synoptic diagram.
Embodiment
For the utility model is become apparent, now with preferred embodiment, and conjunction with figs. is described in detail below.
Embodiment
As shown in Figure 1, be mill coal drying of the present utility model and e Foerderanlage synoptic diagram, described mill coal drying and e Foerderanlage comprise run coal bin, feeding machine, hotblast stove, nitrogen distributor, recirculation blower, mixing tank, predrying device, coal pulverizer, sound attitude separator, fly-ash separator, the low pressure storehouse, the transformation storehouse, feed hopper and gasification nozzle, the run coal bin outlet links to each other with the import of feeding machine by pipeline, the outlet of feeding machine links to each other with the coal dust import of predrying device by pipeline, the discharge of predrying device links to each other with the opening for feed of coal pulverizer by pipeline, coal pulverizer is provided with sound attitude separator, sound attitude separator has qualified discharge and defective discharge, defective discharge connects coal pulverizer, qualified discharge connects the coal dust import of sack cleaner by pipeline, the meal outlet of sack cleaner connects the import in low pressure storehouse, the outlet in low pressure storehouse connects the import in transformation storehouse by pipeline, the outlet in transformation storehouse connects the import of feed hopper by pipeline, the outlet of feed hopper connects gasification nozzle by pipeline, hotblast stove is provided with air intlet and fuel inlet and recycle gas import, the outlet of hotblast stove connects first import of mixing tank, second import of mixing tank connects nitrogen distributor, first hot-blast outlet of mixing tank links to each other with predrying device by pipeline, second hot-blast outlet links to each other with the gas feed of coal pulverizer by pipeline, nitrogen distributor also connects sack cleaner, the low pressure storehouse, transformation storehouse and feed hopper, the pneumatic outlet of predrying device connects sack cleaner, the pneumatic outlet of sack cleaner connects blow-off valve and recirculation blower, the outlet of recirculation blower connects the recycle gas import of hotblast stove, be connected with pressure equalizing pipe between described transformation storehouse and the feed hopper, pressure-balanced valve is arranged on the pressure equalizing pipe.Pipeline between described low pressure storehouse and the transformation storehouse and the pipeline between transformation storehouse and the feed hopper are provided with pneumatic ball valve.
Adopt said apparatus, the concrete steps of carrying out mill coal drying and conveying are:
Carry out drying in the predrying device with sending into after the metering of the process of the raw coal in run coal bin feeding machine, dried raw coal is fully ground in coal pulverizer, the wind powder mixture that grinds gained separates in sound attitude separator, the isolated underproof coal dust of sound attitude separator returns coal pulverizer to be continued to mill, the isolated gas of sound attitude separator and qualified coal dust and the gas that produces through predrying device and coal dust intermixture enter sack cleaner and finish most gas solid separation, isolated coal dust enters the low pressure storehouse, coal dust enters the transformation storehouse by pipeline in the low pressure storehouse, fine coal enters feed hopper by pipeline in the transformation storehouse, fine coal enters gasification nozzle by pipeline in the feed hopper, the isolated gas major part of sack cleaner is returned hotblast stove circulation heating by recirculation blower, and small part is come moisture content in the adjustments of gas by blow-off valve emptying; Air in the hotblast stove and the fuel combustion gas that produces and the nitrogen that comes from nitrogen distributor are mixed to regulate oxygen amount and the temperature of hot blast in mixing tank, mixed hot blast is divided into two-way, wherein one the tunnel enter predrying device for dry raw coal, hot blast fully contacts the drying that realizes raw coal with raw coal in predrying device, another road enters coal pulverizer and is used for dry coal dust; Nitrogen in the nitrogen distributor is delivered to sack cleaner as blowback air and the inertia protection gas of sack cleaner, the nitrogen in the nitrogen distributor is delivered to low pressure storehouse, transformation storehouse and feed hopper as protection gas and pressurising and the fluidizing agent of low pressure storehouse, transformation storehouse and feed hopper.
Claims (4)
1. mill coal drying and e Foerderanlage that is applicable to the high moisture content coal, it is characterized in that, comprise run coal bin, feeding machine, hotblast stove, nitrogen distributor, recirculation blower, mixing tank, predrying device, coal pulverizer, sound attitude separator, sack cleaner, the low pressure storehouse, the transformation storehouse, feed hopper and gasification nozzle, the run coal bin outlet links to each other with the import of feeding machine by pipeline, the outlet of feeding machine links to each other with the coal dust import of predrying device by pipeline, the discharge of predrying device links to each other with the opening for feed of coal pulverizer by pipeline, coal pulverizer is provided with sound attitude separator, sound attitude separator has qualified discharge and defective discharge, defective discharge connects coal pulverizer, qualified discharge connects the coal dust import of sack cleaner by pipeline, the meal outlet of sack cleaner connects the import in low pressure storehouse, the outlet in low pressure storehouse connects the import in transformation storehouse by pipeline, the outlet in transformation storehouse connects the import of feed hopper by pipeline, the outlet of feed hopper connects gasification nozzle by pipeline, hotblast stove is provided with air intlet and fuel inlet and recycle gas import, the outlet of hotblast stove connects first import of mixing tank, second import of mixing tank connects nitrogen distributor, first hot-blast outlet of mixing tank links to each other with predrying device by pipeline, second hot-blast outlet links to each other with the gas feed of coal pulverizer by pipeline, nitrogen distributor also connects sack cleaner, the low pressure storehouse, transformation storehouse and feed hopper, the pneumatic outlet of predrying device connects sack cleaner, the pneumatic outlet of sack cleaner connects recirculation blower, and the outlet of recirculation blower connects the recycle gas import of hotblast stove.
2. mill coal drying and the e Foerderanlage that is applicable to the high moisture content coal as claimed in claim 1 is characterized in that the pneumatic outlet of described sack cleaner also connects blow-off valve.
3. mill coal drying and the e Foerderanlage that is applicable to the high moisture content coal as claimed in claim 1 is characterized in that, is connected with pressure equalizing pipe between described transformation storehouse and the feed hopper, and pressure-balanced valve is arranged on the pressure equalizing pipe.
4. mill coal drying and the e Foerderanlage that is applicable to the high moisture content coal as claimed in claim 1 is characterized in that, the pipeline between described low pressure storehouse and the transformation storehouse and the pipeline between transformation storehouse and the feed hopper are provided with pneumatic ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320076226 CN203229496U (en) | 2013-02-18 | 2013-02-18 | Milled coal drying and conveying device applicable to high-moisture-content coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320076226 CN203229496U (en) | 2013-02-18 | 2013-02-18 | Milled coal drying and conveying device applicable to high-moisture-content coal |
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| CN203229496U true CN203229496U (en) | 2013-10-09 |
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| CN 201320076226 Withdrawn - After Issue CN203229496U (en) | 2013-02-18 | 2013-02-18 | Milled coal drying and conveying device applicable to high-moisture-content coal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146435A (en) * | 2013-02-18 | 2013-06-12 | 上海锅炉厂有限公司 | High-moisture coal pulverizing, drying and conveying apparatus and method thereof |
| CN104549693A (en) * | 2014-12-15 | 2015-04-29 | 西安西热锅炉环保工程有限公司 | Medium-speed coal mill and medium-speed coal milling method suitable for high-moisture lignite |
| CN105565687A (en) * | 2015-12-30 | 2016-05-11 | 石家庄新华能源环保科技股份有限公司 | Pulverized coal injection delivery system for lime kiln |
| CN106439885A (en) * | 2016-09-28 | 2017-02-22 | 江苏省冶金设计院有限公司 | Raw coal direct blowing type pulverizing device |
| CN107541297A (en) * | 2017-09-06 | 2018-01-05 | 恒盛能源股份有限公司 | A kind of dustless environment protecting coal fired power generation method |
| CN108105588A (en) * | 2017-12-29 | 2018-06-01 | 贵州天福化工有限责任公司 | The security isolation method of coal pulverizer in a kind of mill coal drying system |
| CN114507550A (en) * | 2022-02-23 | 2022-05-17 | 新奥科技发展有限公司 | Pressure control system of pressure changing device |
-
2013
- 2013-02-18 CN CN 201320076226 patent/CN203229496U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146435A (en) * | 2013-02-18 | 2013-06-12 | 上海锅炉厂有限公司 | High-moisture coal pulverizing, drying and conveying apparatus and method thereof |
| CN104549693A (en) * | 2014-12-15 | 2015-04-29 | 西安西热锅炉环保工程有限公司 | Medium-speed coal mill and medium-speed coal milling method suitable for high-moisture lignite |
| CN105565687A (en) * | 2015-12-30 | 2016-05-11 | 石家庄新华能源环保科技股份有限公司 | Pulverized coal injection delivery system for lime kiln |
| CN106439885A (en) * | 2016-09-28 | 2017-02-22 | 江苏省冶金设计院有限公司 | Raw coal direct blowing type pulverizing device |
| CN107541297A (en) * | 2017-09-06 | 2018-01-05 | 恒盛能源股份有限公司 | A kind of dustless environment protecting coal fired power generation method |
| CN108105588A (en) * | 2017-12-29 | 2018-06-01 | 贵州天福化工有限责任公司 | The security isolation method of coal pulverizer in a kind of mill coal drying system |
| CN114507550A (en) * | 2022-02-23 | 2022-05-17 | 新奥科技发展有限公司 | Pressure control system of pressure changing device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131009 Effective date of abandoning: 20140903 |
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| RGAV | Abandon patent right to avoid regrant |