CN104154554B - A kind of fine cleaned coal dehumidification system dust disposal technique - Google Patents

A kind of fine cleaned coal dehumidification system dust disposal technique Download PDF

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CN104154554B
CN104154554B CN201410412867.8A CN201410412867A CN104154554B CN 104154554 B CN104154554 B CN 104154554B CN 201410412867 A CN201410412867 A CN 201410412867A CN 104154554 B CN104154554 B CN 104154554B
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coal
dust
powder boiler
worm conveyor
roller dryer
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CN104154554A (en
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李学静
王甲
姜喜瑞
瓮增彦
魏宏武
刘满平
郭芬
孟如
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Tangshan environmental protection Polytron Technologies Inc
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TANGSHAN TIANHE TECHNOLOGY DEVELOPMENT Co Ltd
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Abstract

The present invention relates to a kind of fine cleaned coal dehumidification system dust disposal technique, belong to fine cleaned coal dehumidification system dust disposal technical field. Technical scheme is: the material outlet of roller dryer (1) arranges removal device (2), outlet above removal device connects tornado dust collector (3), dust outlet below tornado dust collector connects worm conveyor (4), worm conveyor coupling has material envelope pump (5), material envelope pump connects coal-powder boiler with burner (9) by transport pipeline, and pipeline is provided with blower fan of delivering coal (7) and atomizing fan (8); Coal-powder boiler burner is arranged on coal-powder boiler (14). The hot dust recycling that roller dryer is produced by the present invention, it is directly used in coal-powder boiler burning and produces hot blast, feed roller drying machine uses as dry-heat air, form a benign cycle, both the expense of background technology outsourcing coal dust had been saved, energy-conserving and environment-protective again, operation and problem easy to maintenance, that efficiently solve dry rear fine cleaned coal dust pollution.

Description

A kind of fine cleaned coal dehumidification system dust disposal technique
Technical field
The present invention relates to a kind of fine cleaned coal dehumidification system dust disposal technique, belong to fine cleaned coal dehumidification system dust disposal technical field.
Background technology
Along with the continuous increase of the selected rate of China's raw coal, especially based on washing, wash rear fine cleaned coal need processed by generation more. Fine cleaned coal is pulverous cleaned coal, and cleaned coal is exactly raw coal through coal washing, removes spoil in coal, is cleaned coal. 2012, the selected amount 20.5 hundred million tons of China's raw coal, selected rate 56%, according to " energy development " 12 planning " ", 2015, the selected rate of China's raw coal reached more than 65%. After raw coal enters to wash, while washing the raising of rear quantity of cleaned coal, also produce a large amount of high-moisture fine cleaned coals, or even fine cleaned coal muddy water. The fine cleaned coal product of these high-moistures has to pass through processed, otherwise can cause serious environmental pollution. Fine cleaned coal reaches and again utilizes the most important requirement to be exactly that moisture reaches requirement, at present, background technology adopts fine cleaned coal drying plant (such as: roller dryer etc.) that fine cleaned coal is dried process, but, fine cleaned coal produces a large amount of heat smoke after drying, and its dustiness is big, seriously polluted, it is the key link hindering fine cleaned coal drying, how to process fine cleaned coal dried dust pollution problem, become the technical problem that the dry field of fine cleaned coal is urgently to be resolved hurrily.
Summary of the invention
The present invention provides a kind of fine cleaned coal dehumidification system dust disposal technique, structure is simple, operation and easy to maintenance, duration of service length, reclaim hot waste gas recycling, solve the problems referred to above that background technology exists.
The technical scheme of the present invention is:
A kind of fine cleaned coal dehumidification system dust treatment plant, comprise roller dryer, removal device, tornado dust collector, worm conveyor, material envelope pump, blower fan of delivering coal, atomizing fan, coal-powder boiler and coal-powder boiler burner, the material outlet of roller dryer arranges removal device, outlet above removal device connects tornado dust collector, dust outlet below tornado dust collector connects worm conveyor, worm conveyor coupling has material envelope pump, material envelope pump connects coal-powder boiler burner by transport pipeline, and pipeline is provided with deliver coal blower fan and atomizing fan; Coal-powder boiler burner is arranged on coal-powder boiler, and the exhanst gas outlet of coal-powder boiler connects the dry-heat air import of roller dryer.
Described worm conveyor is also provided with motor-driven control valve, is provided with discharging transportation equipment below removal device, and motor-driven control valve connects discharging transportation equipment.
Slag transportation equipment it is provided with below described coal-powder boiler.
Exhanst gas outlet above described tornado dust collector is provided with induced draft fan, is connected with follow-up dust removal installation.
A kind of fine cleaned coal dehumidification system dust disposal technique, comprises following processing step:
1. material to be dried is fine cleaned coal, enters roller dryer, and the product after warm air drying is discharged by below removal device, enters discharging transportation equipment; The dust flue gas that roller dryer produces in drying process enters tornado dust collector together by the outlet above removal device;
2., after tornado dust collector dedusting, the dust (microfine coal) below tornado dust collector enters worm conveyor by dust outlet; Worm conveyor is provided with material envelope pump and motor-driven control valve; Material envelope pump connects coal-powder boiler burner by transport pipeline, and pipeline is provided with deliver coal blower fan and atomizing fan; Coal-powder boiler burner is arranged on coal-powder boiler, and the exhanst gas outlet of coal-powder boiler connects the dry-heat air import of roller dryer; Motor-driven control valve connects discharging transportation equipment;
3. according to the coal dust usage quantity of coal-powder boiler, determine the trend of the dust on worm conveyor, after wherein the dust of a part seals pump, transport pipeline and blower fan of delivering coal, atomizing fan through punishment in advance, send into coal-powder boiler burner, carrying out Thorough combustion, after its burning, heat is used for meeting roller dryer use; Another part dust is discharged from worm conveyor by motor-driven control valve control, transports through discharging transportation equipment together with the dry rear product discharged below removal device;
4. roller dryer produce dust and flue gas, after tornado dust collector dedusting, above it exhanst gas outlet discharge flue gas in still have small part fine dust to exist, pass through pipeline, under induced draft fan effect, entering follow-up dust removal installation, the water vapour of meet the requirement of environmental protection enters air after filtering;
5. the dust on worm conveyor, preferentially meets the use of coal-powder boiler, and coal-powder boiler produces hot gas and enters roller dryer as dry-heat air, forms an enclosed circulation; Remaining dust is discharged from worm conveyor by motor-driven control valve control; By the regulating and controlling of motor-driven control valve, whole system is made to reach equilibrium state.
The fine cleaned coal drying equipment system of to be coal-powder boiler, dust be dried dust that the present invention is applicable to heating system. Material to be dried is high-moisture fine cleaned coal, and the dust of recovery can meet coal-powder boiler burning, it is provided that heat smoke supply dehumidification system uses. Principle of work is as follows: the dust of fine cleaned coal dehumidification system is through tornado dust collector depositing dust, by series of steps such as coal powder conveyer, pipeline reprinting, motorized adjustment valve regulation coal dust amounts, by delivering coal, coal-powder boiler burner sent into by blower fan, then carries out Thorough combustion after atomizing fan is atomized; Through the dust that tornado dust collector are not removed, entering follow-up dust removal installation after dust delivering tube route induced draft fan is extracted out, after filtering, the water vapour of meet the requirement of environmental protection enters air. If the dust fallen through tornado dust collector exceeds coal-powder boiler usage quantity, enter coal-powder boiler coal supply pipeline by a bifurcated pipeline part, in addition go out dust part can drying system discharging equipment, transport together with fine cleaned coal after dry.
The invention has the beneficial effects as follows: the hot dust recycling that roller dryer is produced by the present invention, it is directly used in coal-powder boiler burning and produces hot blast, feed roller drying machine uses as dry-heat air, form a benign cycle, both the expense of background technology outsourcing coal dust had been saved, energy-conserving and environment-protective again, structure is simple, operation and easy to maintenance, duration of service length, reclaim hot waste gas recycling, efficiently solve dry after the problem of fine cleaned coal dust pollution.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic diagram;
In figure: roller dryer 1, removal device 2, tornado dust collector 3, worm conveyor 4, material envelope pump 5, motor-driven control valve 6, deliver coal blower fan 7, atomizing fan 8, coal-powder boiler burner 9, induced draft fan 10, discharging transportation equipment 11, slag transportation equipment 12, follow-up dust removal installation 13, coal-powder boiler 14, material to be dried 15.
Embodiment
Below in conjunction with accompanying drawing, by example, the invention will be further described.
A kind of fine cleaned coal dehumidification system dust treatment plant, comprise roller dryer 1, removal device 2, tornado dust collector 3, worm conveyor 4, material envelope pump 5, blower fan 7 of delivering coal, atomizing fan 8, coal-powder boiler 14 and coal-powder boiler burner 9, the material outlet of roller dryer arranges removal device, outlet above removal device connects tornado dust collector, dust outlet below tornado dust collector connects worm conveyor, worm conveyor coupling has material envelope pump, material envelope pump connects coal-powder boiler burner by transport pipeline, and pipeline is provided with deliver coal blower fan and atomizing fan; Coal-powder boiler burner is arranged on coal-powder boiler, and the exhanst gas outlet of coal-powder boiler connects the dry-heat air import of roller dryer.
Described worm conveyor is also provided with motor-driven control valve 6, is provided with discharging transportation equipment 11 below removal device 2, and motor-driven control valve connects discharging transportation equipment 11.
Slag transportation equipment 12 it is provided with below described coal-powder boiler.
Exhanst gas outlet above described tornado dust collector is provided with induced draft fan 10, is connected with follow-up dust removal installation 13.
A kind of fine cleaned coal dehumidification system dust disposal technique, comprises following processing step:
1. material to be dried 15 is fine cleaned coal, enters roller dryer 1, and the product after warm air drying is discharged by below removal device 2, enters discharging transportation equipment 11; The dust flue gas that roller dryer produces in drying process enters tornado dust collector 3 together by the outlet above removal device;
In the present embodiment, fly-ash separator removes the dust got off, water capacity 8%, temperature 650C, Dust Capacity accounts for more than the 90% of coarse particles mass ratio, accounts for the 80%��85% of total dust mass ratio;
2., after tornado dust collector 3 dedusting, the dust (microfine coal) below tornado dust collector enters worm conveyor 4 by dust outlet; Worm conveyor 4 is provided with material envelope pump 5 and motor-driven control valve 6; Material envelope pump connects coal-powder boiler burner by transport pipeline, and pipeline is provided with deliver coal blower fan and atomizing fan; Coal-powder boiler burner is arranged on coal-powder boiler, and the exhanst gas outlet of coal-powder boiler connects the dry-heat air import of roller dryer; Motor-driven control valve connects discharging transportation equipment 11;
3. according to the coal dust usage quantity of coal-powder boiler, determine the trend of the dust on worm conveyor, after wherein the dust of a part seals pump 5, transport pipeline and blower fan 7 of delivering coal, atomizing fan 8 through punishment in advance, send into coal-powder boiler burner 9, carrying out Thorough combustion, after its burning, heat is used for meeting roller dryer use; Another part dust is discharged from worm conveyor by motor-driven control valve control, transports through discharging transportation equipment 11 together with the dry rear product discharged below removal device 2;
In the present embodiment, the dust of mass ratio 60%��75%, seal pump 5, transport pipeline and blower fan 7 of delivering coal, atomizing fan 8 through punishment in advance after, sends into coal-powder boiler burner 9, carries out Thorough combustion;
4. roller dryer produce dust and flue gas, after tornado dust collector 3 dedusting, above it exhanst gas outlet discharge flue gas in still have small part fine dust to exist, pass through pipeline, under induced draft fan 10 acts on, entering follow-up dust removal installation, the water vapour of meet the requirement of environmental protection enters air after filtering;
5. the dust on worm conveyor, preferentially meets the use of coal-powder boiler, and coal-powder boiler produces hot gas and enters roller dryer as dry-heat air, forms an enclosed circulation; Remaining dust is discharged from worm conveyor by motor-driven control valve control; By the regulating and controlling of motor-driven control valve, whole system is made to reach equilibrium state.
Principle of work of the present invention is as follows: the dust of fine cleaned coal dehumidification system is through tornado dust collector depositing dust, by series of steps such as coal powder conveyer, pipeline reprinting, motorized adjustment valve regulation coal dust amounts, by delivering coal, coal-powder boiler burner sent into by blower fan, then carries out Thorough combustion after atomizing fan is atomized; Through the dust that tornado dust collector are not removed, entering two road dust removal installations after dust delivering tube route induced draft fan is extracted out, after filtering, the water vapour of meet the requirement of environmental protection enters air; If if the dust fallen through tornado dust collector exceeds coal-powder boiler usage quantity, entering coal-powder boiler coal supply pipeline by a bifurcated pipeline part, in addition go out dust part can drying system discharging equipment, transport together with fine cleaned coal after dry.
The hot dust recycling that roller dryer is produced by the present invention, it is directly used in coal-powder boiler burning and produces hot blast, feed roller drying machine uses as dry-heat air, form a benign cycle, both the expense of background technology outsourcing coal dust had been saved, energy-conserving and environment-protective again, utilization of waste material, efficiently solves the problem of dry rear fine cleaned coal dust pollution.

Claims (1)

1. a fine cleaned coal dehumidification system dust disposal technique, it is characterised in that comprise following processing step:
1. material to be dried (15) is fine cleaned coal, enters roller dryer (1), and the product after warm air drying is discharged by removal device (2) lower section, enters discharging transportation equipment (11); The dust flue gas that roller dryer produces in drying process enters tornado dust collector (3) together by the outlet above removal device;
2., after tornado dust collector (3) dedusting, the dust below tornado dust collector enters worm conveyor (4) by dust outlet; Worm conveyor (4) is provided with material envelope pump (5) and motor-driven control valve (6); Material envelope pump connects coal-powder boiler burner by transport pipeline, and transport pipeline is provided with deliver coal blower fan and atomizing fan; Coal-powder boiler burner is arranged on coal-powder boiler, and the exhanst gas outlet of coal-powder boiler connects the dry-heat air import of roller dryer; Motor-driven control valve connects discharging transportation equipment (11);
3. according to the coal dust usage quantity of coal-powder boiler, determining the trend of the dust on worm conveyor, wherein the dust of a part seals pump (5) and transport pipeline through punishment in advance, sends into coal-powder boiler with burner (9), carrying out Thorough combustion, after its burning, heat is used for meeting roller dryer use; Another part dust is discharged from worm conveyor by motor-driven control valve control, transports through discharging transportation equipment (11) together with product after the drying that removal device (2) lower section is discharged;
4. roller dryer produce dust and flue gas, after tornado dust collector (3) dedusting, the flue gas that above it, exhanst gas outlet is discharged still have small part fine dust to exist, pass through pipeline, under induced draft fan (10) acts on, entering follow-up dust removal installation, the water vapour of meet the requirement of environmental protection enters air after filtering;
5. the dust on worm conveyor, preferentially meets the use of coal-powder boiler, and coal-powder boiler produces hot gas and enters roller dryer as dry-heat air, forms an enclosed circulation; Remaining dust is discharged from worm conveyor by motor-driven control valve control; By the regulating and controlling of motor-driven control valve, whole system is made to reach equilibrium state.
CN201410412867.8A 2014-08-21 2014-08-21 A kind of fine cleaned coal dehumidification system dust disposal technique Active CN104154554B (en)

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CN105972976A (en) * 2016-05-01 2016-09-28 沈阳远大科技实业有限公司 Returning device for hot-blast furnace of lignite processing system
CN110026037B (en) * 2019-05-17 2021-05-28 中冶北方(大连)工程技术有限公司 System and process for storing and transporting binder for pellet production

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5749728A (en) * 1980-09-08 1982-03-23 Onoda Cement Co Ltd Pulverized coal combustion device
CN101519617A (en) * 2009-03-13 2009-09-02 张兆奇 Process and equipment for improving the quality of coal slurry and lignite through drying same
CN201992959U (en) * 2011-03-10 2011-09-28 郑州市鼎力干燥设备有限公司 Coal slurry drying device
CN102798276A (en) * 2012-08-28 2012-11-28 郑州市鼎力干燥设备有限公司 Combustion device for coal slime dust back combustion device
CN103013615A (en) * 2012-12-19 2013-04-03 华电电力科学研究院 Efficient drying and quality-improving device and method for brown coal
CN203518518U (en) * 2013-10-19 2014-04-02 郑州市东鼎干燥设备有限公司 Recycle burning device for coal powder obtained after brown coal drying
CN204006066U (en) * 2014-08-21 2014-12-10 唐山天和科技开发有限公司 A kind of fine cleaned coal drying system dust treatment plant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5749728A (en) * 1980-09-08 1982-03-23 Onoda Cement Co Ltd Pulverized coal combustion device
CN101519617A (en) * 2009-03-13 2009-09-02 张兆奇 Process and equipment for improving the quality of coal slurry and lignite through drying same
CN201992959U (en) * 2011-03-10 2011-09-28 郑州市鼎力干燥设备有限公司 Coal slurry drying device
CN102798276A (en) * 2012-08-28 2012-11-28 郑州市鼎力干燥设备有限公司 Combustion device for coal slime dust back combustion device
CN103013615A (en) * 2012-12-19 2013-04-03 华电电力科学研究院 Efficient drying and quality-improving device and method for brown coal
CN203518518U (en) * 2013-10-19 2014-04-02 郑州市东鼎干燥设备有限公司 Recycle burning device for coal powder obtained after brown coal drying
CN204006066U (en) * 2014-08-21 2014-12-10 唐山天和科技开发有限公司 A kind of fine cleaned coal drying system dust treatment plant

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Address after: 063000, Hebei Tangshan City hi tech Zone Wafangdian Village South

Patentee after: Tangshan environmental protection Polytron Technologies Inc

Address before: 063000, Hebei Tangshan City hi tech Zone Wafangdian Village South

Patentee before: Tangshan Tianhe Technology Development Co., Ltd.