CN103146435A - High-moisture coal pulverizing, drying and conveying apparatus and method thereof - Google Patents

High-moisture coal pulverizing, drying and conveying apparatus and method thereof Download PDF

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Publication number
CN103146435A
CN103146435A CN201310052678XA CN201310052678A CN103146435A CN 103146435 A CN103146435 A CN 103146435A CN 201310052678X A CN201310052678X A CN 201310052678XA CN 201310052678 A CN201310052678 A CN 201310052678A CN 103146435 A CN103146435 A CN 103146435A
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coal
outlet
connects
storehouse
pipeline
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CN103146435B (en
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马胜
乌晓江
张建文
李平
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Shanghai Boiler Works Co Ltd
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Shanghai Boiler Works Co Ltd
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Abstract

The invention relates to a high-moisture coal pulverizing, drying and conveying apparatus and a method thereof. The coal pulverizing, drying and conveying apparatus is characterized in that the apparatus comprises a raw coal bunker, a feeder, a hot blast stove, a nitrogen distributor, a circulating fan, a mixer, a pre-drier, a coal pulverizer, a dynamic and static separator, a bag deduster, a low pressure bunker, a variable pressure bunker, a feeding bunker and a gasification nozzle, the raw coal bunker is connected with the feeder, the feeder is connected with the inlet of the pre-drier, and the inertia hot air at the outlet of the hot blast stove is divided into two airflows which are connected with the pre-drier and the coal pulverizer respectively; and the coal pulverizer is provided with the dynamic and static separator, the outlet of the dynamic and static separator is connected with the deduster, the gas outlet of the deduster is connected with the circulating fan, the pulverized coal outlet of the deduster is connected with the low pressure bunker, the low pressure bunker is connected with the variable pressure bunker, and the variable pressure bunker is connected with the feeding bunker. The apparatus has a wide application range of coal kinds, and is especially suitable for the drying and the pulverization of coals comprising high-moisture brown coal and the like; and the granularity distribution and the water content of the prepared pulverized coal are adapted to requirements of a gasification furnace.

Description

A kind of mill coal drying and e Foerderanlage and method that is applicable to the high moisture content coal
Technical field
The present invention 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 gasification furnace of pressurized aerated bed.
Background technology
Air-flow bed coal-gasification is because effectively the gas composition is high, transformation efficiency coal is high and obtained in the world using widely than the oxygen consumption with than advantages such as coal consumption are low, the air-flow bed coal-gasification technology mainly is divided into powdered coal pressuring gasified and water coal slurry pressure gasification, and the Typical Representative of coal gasification has: the single nozzle water wall gasification that two-part bed pulverized coal gasification technology, space flight furnace gas, 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 Representative has: the classification oxygen supply coal water slurry gasification of the multiple-nozzle contraposition type coal water slurry gasification of GE coal water slurry gasification, East China University of Science, the gasification of the polynary slurry of Xibei Chemical Inst and 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 pulverized coal 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 are high, be difficult to adapt to the low grade coals such as high-moisture brown coal and bitumionus 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 is no the hot flue gas of station boiler and the hot blast that air preheater produces in most of coal gasification apparatus, and there is potential safety hazard in the oxygen level that the method is difficult to guarantee well system lower than prescribed value.
Mill coal drying of the present invention and e Foerderanlage and method, coal dust adaptability to high-moisture is good, can obtain the dry pulverized coal of the low and rational size distribution of water content, dry pulverized coal enters the vapourizing furnace gasification by e Foerderanlage, after dry, coal dust delivers into the vapourizing furnace reaction by coal dust, has improved significantly coal gasification operation stability, reliability and synthesis gas yield.
Summary of the invention
The purpose of this invention is to provide a kind of can powder process and the apparatus and method of conveying, to solve the shortcoming that is difficult to adapt to the coal fuel pulverizing plants such as high-moisture brown coal in 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 invention 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 is connected with the import of feeding machine by pipeline, the outlet of feeding machine is connected with the coal dust import of predrying device by pipeline, the discharge of predrying device is connected with the opening for feed of coal pulverizer by pipeline, be provided with sound attitude separator on coal pulverizer, 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, be provided with air intlet and fuel inlet and recycle gas import on hotblast stove, the outlet of hotblast stove connects the first import of mixing tank, the second import of mixing tank connects nitrogen distributor, the first hot-blast outlet of mixing tank is connected with predrying device by pipeline, the second hot-blast outlet is connected 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, 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 feed hopper, pressure-balanced valve is arranged on pressure equalizing pipe.
Further, be provided with pneumatic ball valve on the pipeline between described low pressure storehouse and transformation storehouse and the pipeline between transformation storehouse and feed hopper.
The present invention 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:
send into after raw coal in run coal bin is measured through feeding machine and carry out drying in predrying device, 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 to 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 complete most gas solid separation, isolated coal dust passes through the low pressure storehouse successively, enter gasification nozzle after transformation storehouse and feed hopper, isolated gas major part is returned to the hotblast stove circulating-heating by recirculation blower, small part is by blow-off valve emptying, with the water-content in regulation system, hotblast stove Air 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 nitrogen distributor is delivered to sack cleaner as the blowback air of sack cleaner and inertia protection gas, the nitrogen in 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 invention has the beneficial effects as follows:
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 capacity of pulverized coal preparation system increases 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 adopting warm air drying and sound attitude separator being set in coal mill system, the coal powder size regulation range is large; By warm air drying can dry high-moisture coal, coal dust moisture decrease is conducive to the conveying of coal dust, hot blast before entering coal pulverizer with nitrogen mixture control oxygen level, be conducive to improve Security of the system;
3. utilize the nitrogen in nitrogen distributor to protect gas as blowback air and the inertia of sack cleaner, nitrogen has effectively guaranteed the safety and 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 course of conveying;
4. the mixture of the gas that produces through predrying device and the gas of coal dust intermixture and coal pulverizer outlet and coal dust all enters sack cleaner and carries out gas solid separation, gas returns to the hotblast stove recycle through recirculation blower, whole system is the negative-pressure sealed system of self-circulation, escape without dust and coal dust, environmental friendliness, the security of system performance is good.
Description of drawings
Fig. 1 is mill coal drying of the present invention and e Foerderanlage schematic diagram.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
as shown in Figure 1, be mill coal drying of the present invention and e Foerderanlage schematic 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 is connected with the import of feeding machine by pipeline, the outlet of feeding machine is connected with the coal dust import of predrying device by pipeline, the discharge of predrying device is connected with the opening for feed of coal pulverizer by pipeline, be provided with sound attitude separator on coal pulverizer, 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, be provided with air intlet and fuel inlet and recycle gas import on hotblast stove, the outlet of hotblast stove connects the first import of mixing tank, the second import of mixing tank connects nitrogen distributor, the first hot-blast outlet of mixing tank is connected with predrying device by pipeline, the second hot-blast outlet is connected 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 feed hopper, pressure-balanced valve is arranged on pressure equalizing pipe.Be provided with pneumatic ball valve on pipeline between described low pressure storehouse and transformation storehouse and the pipeline between transformation storehouse and feed hopper.
Adopt said apparatus, the concrete steps of carrying out mill coal drying and conveying are:
send into after raw coal in run coal bin is measured through feeding machine and carry out drying in predrying device, 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 to 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 complete most gas solid separation, isolated coal dust enters the low pressure storehouse, in the low pressure storehouse, coal dust enters the transformation storehouse by pipeline, in the transformation storehouse, fine coal enters feed hopper by pipeline, in feed hopper, fine coal enters gasification nozzle by pipeline, the isolated gas major part of sack cleaner is returned to the hotblast stove circulating-heating by recirculation blower, small part is come moisture content in adjustments of gas by blow-off valve emptying, hotblast stove Air and the fuel combustion gas that produces and the nitrogen that comes from nitrogen distributor are mixed to regulate oxygen amount and temperature 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 in predrying device with raw coal, another road enters coal pulverizer and is used for dry coal dust, nitrogen in nitrogen distributor is delivered to sack cleaner as the blowback air of sack cleaner and inertia protection gas, the nitrogen in 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.

Claims (5)

1. a 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 is connected with the import of feeding machine by pipeline, the outlet of feeding machine is connected with the coal dust import of predrying device by pipeline, the discharge of predrying device is connected with the opening for feed of coal pulverizer by pipeline, be provided with sound attitude separator on coal pulverizer, 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, be provided with air intlet and fuel inlet and recycle gas import on hotblast stove, the outlet of hotblast stove connects the first import of mixing tank, the second import of mixing tank connects nitrogen distributor, the first hot-blast outlet of mixing tank is connected with predrying device by pipeline, the second hot-blast outlet is connected 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, the outlet of recirculation blower connects the recycle gas import of hotblast stove.
2. mill coal drying as claimed in claim 1 and e Foerderanlage, is characterized in that, the pneumatic outlet of described sack cleaner also connects blow-off valve.
3. mill coal drying as claimed in claim 1 and e Foerderanlage, is characterized in that, is connected with pressure equalizing pipe between described transformation storehouse and feed hopper, and pressure-balanced valve is arranged on pressure equalizing pipe.
4. mill coal drying as claimed in claim 1 and e Foerderanlage, is characterized in that, is provided with pneumatic ball valve on the pipeline between described low pressure storehouse and transformation storehouse and the pipeline between transformation storehouse and feed hopper.
5. a mill coal drying and carrying method, is characterized in that, adopt a kind of mill coal drying claimed in claim 1 and e Foerderanlage, concrete steps are:
send into after raw coal in run coal bin is measured through feeding machine and carry out drying in predrying device, 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 to 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 complete most gas solid separation, isolated coal dust passes through the low pressure storehouse successively, enter gasification nozzle after transformation storehouse and feed hopper, isolated gas major part is returned to the hotblast stove circulating-heating by recirculation blower, small part is by blow-off valve emptying, with the water-content in regulation system, hotblast stove Air 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 nitrogen distributor is delivered to sack cleaner as the blowback air of sack cleaner and inertia protection gas, the nitrogen in 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.
CN201310052678.XA 2013-02-18 2013-02-18 High-moisture coal pulverizing, drying and conveying apparatus and method thereof Active CN103146435B (en)

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN103816987A (en) * 2013-12-09 2014-05-28 国家电网公司 Method for calculating powder output of double-inlet and double-outlet coal mill
CN104498096A (en) * 2014-12-26 2015-04-08 富阳鸿祥技术服务有限公司 Efficient coal gasification method
CN105295974A (en) * 2015-11-18 2016-02-03 中国五环工程有限公司 High-temperature carbonaceous raw material pulverizing and conveying technology as well as its system
CN105327765A (en) * 2015-12-10 2016-02-17 惠生工程(中国)有限公司 High-moisture low-rank coal pulverizing and water recycling system and method
CN105567335A (en) * 2014-10-13 2016-05-11 彭万旺 Pressurization treating method for coal dust
CN104498102B (en) * 2014-12-26 2016-09-14 富阳鸿祥技术服务有限公司 A kind of coal gasification method
CN106281388A (en) * 2015-05-29 2017-01-04 宝山钢铁股份有限公司 A kind of coal damping lime set pressure tank device and control method thereof
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
CN109340809A (en) * 2018-10-23 2019-02-15 东华工程科技股份有限公司 The control system and method for high volatile fine coal preparation and drying process
CN113025389A (en) * 2021-03-05 2021-06-25 韩乐 Raw coal treatment equipment and method for treating raw coal by using same

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CN102671740A (en) * 2012-05-07 2012-09-19 章礼道 Intelligent roller type medium speed coal mill
CN102889609A (en) * 2011-07-20 2013-01-23 上海机易电站设备有限公司 Pulverizing system of smoke drying lignite coal steel ball mill
CN203229496U (en) * 2013-02-18 2013-10-09 上海锅炉厂有限公司 Milled coal drying and conveying device applicable to high-moisture-content coal

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CN102889609A (en) * 2011-07-20 2013-01-23 上海机易电站设备有限公司 Pulverizing system of smoke drying lignite coal steel ball mill
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CN103816987B (en) * 2013-12-09 2015-10-14 国家电网公司 A kind of computational methods of double inlet and outlet coal mill powder outlet quantity
CN103816987A (en) * 2013-12-09 2014-05-28 国家电网公司 Method for calculating powder output of double-inlet and double-outlet coal mill
CN105567335B (en) * 2014-10-13 2018-06-29 彭万旺 A kind of coal dust pressure treatment method
CN105567335A (en) * 2014-10-13 2016-05-11 彭万旺 Pressurization treating method for coal dust
CN104498096B (en) * 2014-12-26 2016-08-17 张哲夫 A kind of coal gasification method
CN104498096A (en) * 2014-12-26 2015-04-08 富阳鸿祥技术服务有限公司 Efficient coal gasification method
CN104498102B (en) * 2014-12-26 2016-09-14 富阳鸿祥技术服务有限公司 A kind of coal gasification method
CN106281388A (en) * 2015-05-29 2017-01-04 宝山钢铁股份有限公司 A kind of coal damping lime set pressure tank device and control method thereof
CN105295974B (en) * 2015-11-18 2018-05-22 中国五环工程有限公司 A kind of high temperature carbon raw material powder and conveying technique and its system
CN105295974A (en) * 2015-11-18 2016-02-03 中国五环工程有限公司 High-temperature carbonaceous raw material pulverizing and conveying technology as well as its system
CN105327765A (en) * 2015-12-10 2016-02-17 惠生工程(中国)有限公司 High-moisture low-rank coal pulverizing and water recycling system and method
CN105327765B (en) * 2015-12-10 2018-09-04 惠生工程(中国)有限公司 A kind of high-moisture low-order coal powder and water reclamation system and 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
CN109340809A (en) * 2018-10-23 2019-02-15 东华工程科技股份有限公司 The control system and method for high volatile fine coal preparation and drying process
CN113025389A (en) * 2021-03-05 2021-06-25 韩乐 Raw coal treatment equipment and method for treating raw coal by using same

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