CN101986074B - Method for drying coal slime by hot wind and smoke of power station boiler - Google Patents

Method for drying coal slime by hot wind and smoke of power station boiler Download PDF

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Publication number
CN101986074B
CN101986074B CN201010553356XA CN201010553356A CN101986074B CN 101986074 B CN101986074 B CN 101986074B CN 201010553356X A CN201010553356X A CN 201010553356XA CN 201010553356 A CN201010553356 A CN 201010553356A CN 101986074 B CN101986074 B CN 101986074B
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China
Prior art keywords
coal slime
flue gas
boiler
smoke
hot blast
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN201010553356XA
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Chinese (zh)
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CN101986074A (en
Inventor
王永金
孙进杰
李志勇
鲁保全
孙海涛
魏树金
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DATANG JIXI THERMOELECTRIC Co Ltd
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DATANG JIXI THERMOELECTRIC Co Ltd
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Priority to CN201010553356XA priority Critical patent/CN101986074B/en
Publication of CN101986074A publication Critical patent/CN101986074A/en
Application granted granted Critical
Publication of CN101986074B publication Critical patent/CN101986074B/en
Expired - Fee Related legal-status Critical Current
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Abstract

A method for drying coal slime by hot wind and smoke of a power station boiler relates to a method for drying the coal slime. The method solves a problem of waste of much available resources caused by continuous burning of fire coal in a heating furnace. A smoke gate on a smoke pipeline is opened to start a blower to extract boiler smoke, the boiler smoke enters into a feeding box of a rotary cylinder drying machine after being cleaned by a first dust remover, when a temperature of an intake of the rotary cylinder drying machine reaches 150 DEG C, a negative pressure thereof reaches 1000 Pa, a temperature of an discharge port reaches 70 DEG C and pressure thereof is 1150 Pa, a cylinder reducer is started, and a thrasher is also started, the coal slime to be dried is thrashed by the thrasher, and then the thrashed coal slime is transported to the feeding box of the rotary cylinder drying machine via a belt conveyer to be mixed with the hot wind and the smoke. The method for drying the coal slime of the invention uses the hot wind and the smoke of the power station boiler, so that the available resource is rationally used, and a mass of fire coal is saved.

Description

Utilize the hot blast of station boiler and the method for flue gas drying coal slime
Technical field
The present invention relates to a kind of method of dry coal slime, be specifically related to a kind of hot blast of station boiler and method of flue gas drying coal slime utilized.
Background technology
Increase day by day along with coal demand; Enterprise also improves constantly the demand of coal slime; The coal slime dewatering problem earns widespread respect just day by day; Particularly the power plant carries out coal slime and coal and is mixed and mixes burning for reducing coal-fired unit price, and coal slime and coal are mixed, and to mix burning very big to the power plant burning systematic influence, and fluffy coal, chute blockage phenomenon are frequent.For thoroughly addressing the above problem from root, the best way is exactly dry coal slime.The method of dry coal slime comprises hot stove oven dry and mechanical dehydration, but existing hot stove furnace drying method needs continuously burning coal of hot stove, has wasted a large amount of existing resources.
Summary of the invention
The present invention needs continuously burning coal of hot stove in order to solve existing hot stove furnace drying method, has wasted the problem of a large amount of existing resources, and then has proposed a kind of hot blast of station boiler and method of flue gas drying coal slime utilized.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
The hot blast of station boiler and the method for flue gas drying coal slime utilized of the present invention realizes according to following steps:
Flue gas lock gate hatch on step 1, the unlatching flue gas pipeline; Start pressure fan and extract boiler smoke; Boiler smoke gets in the revolving drum drier feed box after the first deduster dedusting; The boiler smoke temperature is 280 ℃, and the boiler export negative pressure is 400Pa~500Pa, flue gas flow rate 15m/s in the control flue gas pipeline;
Step 2, when the revolving drum drier inlet temperature reaches 150 ℃, negative pressure reaches 1000Pa, outlet temperature reaches 70 ℃, when pressure reaches 1150Pa, opens reducer for doffer, the reducer for doffer rotating speed is 3~6 rev/mins;
Step 3, reach 240 ℃ when the revolving drum drier inlet temperature; When the revolving drum drier outlet temperature reaches 90 ℃; Start beater, coal slime to be dried is broken up through beater, open the hot blast lock gate hatch on the hot-blast pipe line simultaneously; Hot blast gets into through hot-blast pipe line in the feed box of revolving drum drier, and the coal slime after will breaing up is then sent into through belt conveyor in the feed box of revolving drum drier and mixed with hot blast and flue gas;
Step 4, coal slime to be dried are fully mixed with boiler hot blast and flue gas, and coal slime to be dried is transported to discharging opening through travelling gear with coal slime;
Step 5, dried coal slime get into the coal pulverizer arrival end of station boiler through elevator and machine for zipper through discharging opening;
After hot blast in step 6, the revolving drum drier and flue gas get into the second deduster dedusting from discharging opening, send into chimney through air-introduced machine and be discharged in the atmosphere.
The invention has the beneficial effects as follows:
One, the method for dry coal slime of the present invention adopts the hot blast and the flue gas drying coal slime of station boiler, has rationally utilized existing resource, has practiced thrift a large amount of fire coals;
Two, the method for dry coal slime of the present invention can significantly be reduced the total moisture of coal slime, and moisture content is 20~25% before the coal slime oven dry, and the coal slime moisture content after the coal slime oven dry is 12%, has improved coal slime caloric value index, satisfies the requirement of power plant to moisture content of coal and caloric value;
Three, the coal slime after the oven dry can directly get into the electricity generation boiler burning, has practiced thrift cost of transportation;
Four, the hot flue gas that produces after the dry coal slime of the present invention is after dedusting, and hot flue gas concentration≤100mg/Nm3 directly is discharged to atmosphere with power plant boiler tail gas and compares, and atmosphere pollution is little.
Description of drawings
Fig. 1 is the process chart of the method for dry coal slime of the present invention.
The specific embodiment
The specific embodiment one: as shown in Figure 1, the described hot blast of station boiler and the method for flue gas drying coal slime utilized of this embodiment realizes according to following steps:
Flue gas lock gate hatch 2 on step 1, the unlatching flue gas pipeline 14 (flue gas pipeline 14 is communicated with the back-end ductwork of boiler 1); Start pressure fan 3 and extract boiler smoke; Boiler smoke gets in revolving drum drier 7 feed box 4 after 10 dedustings of first deduster; The boiler smoke temperature is 280 ℃, and the boiler export negative pressure is 400Pa~500Pa, flue gas flow rate 15m/s in the control flue gas pipeline 14;
Step 2, when revolving drum drier 7 inlet temperatures reach 150 ℃, negative pressure reaches 1000Pa, outlet temperature reaches 70 ℃, when pressure reaches 1150Pa, opens reducer for doffer 5, reducer for doffer 5 rotating speeds are 3~6 rev/mins;
Step 3, reach 240 ℃ when revolving drum drier 7 inlet temperatures; When revolving drum drier 7 outlet temperatures reach 90 ℃; Start beater 13; Coal slime to be dried is broken up through beater 13; Open the hot blast lock gate hatch 19 on the hot-blast pipe line 18 simultaneously, in the feed box 4 of hot blast through hot-blast pipe line 18 (hot-blast pipe line 18 is communicated with the afterbody hot-blast pipe line of boiler 1) entering revolving drum drier 7, the coal slime after will breaing up then sends into through belt conveyor 16 that the feed box 4 of revolving drum drier 7 is interior to be mixed with hot blast and flue gas;
Step 4, coal slime to be dried are fully mixed with boiler hot blast and flue gas, and coal slime to be dried is transported to discharging opening 6 through travelling gear 8 with coal slime;
Step 5, dried coal slime get into the coal pulverizer arrival end of station boiler 1 through elevator 9 and machine for zipper 17 through discharging opening 6;
Hot blast in step 6, the revolving drum drier 7 and flue gas are sent into chimney 12 through air-introduced machine 11 and are discharged in the atmosphere after getting into 15 dedustings of second deduster from discharging opening 6.
The specific embodiment two: in this embodiment step 2, reducer for doffer 5 rotating speeds are 4 rev/mins.So operate, can adjust the rotating speed of reducer for doffer 5 as required.Other is identical with the specific embodiment one.
The specific embodiment three: in this embodiment step 2, reducer for doffer 5 rotating speeds are 5 rev/mins.So operate, can adjust the rotating speed of reducer for doffer 5 as required.Other is identical with the specific embodiment one.

Claims (3)

1. one kind is utilized the hot blast of station boiler and the method for flue gas drying coal slime, and it is characterized in that: the method for said dry coal slime realizes according to following steps:
Flue gas lock gate hatch (2) on step 1, the unlatching flue gas pipeline (14); Start pressure fan (3) and extract boiler smoke; Boiler smoke gets in revolving drum drier (7) feed box (4) after first deduster (10) dedusting; The boiler smoke temperature is 280 ℃, and the boiler export negative pressure is 400Pa~500Pa, the interior flue gas flow rate 15m/s of control flue gas pipeline (14);
Step 2, when revolving drum drier (7) inlet temperature reaches 150 ℃, negative pressure reaches 1000Pa, outlet temperature reaches 70 ℃, when pressure reaches 1150Pa, opens reducer for doffer (5), reducer for doffer (5) rotating speed is 3~6 rev/mins;
Step 3, reach 240 ℃ when revolving drum drier (7) inlet temperature; When revolving drum drier (7) outlet temperature reaches 90 ℃; Start beater (13); Coal slime to be dried is broken up through beater (13); Open the hot blast lock gate hatch (19) on the hot-blast pipe line (18) simultaneously, hot blast gets into through hot-blast pipe line (18) in the feed box (4) of revolving drum drier (7), and the coal slime after will breaing up then sends into through belt conveyor (16) that the feed box (4) of revolving drum drier (7) is interior to be mixed with hot blast and flue gas;
Step 4, coal slime to be dried are fully mixed with boiler hot blast and flue gas, and coal slime to be dried is transported to discharging opening (6) through travelling gear (8) with coal slime;
Step 5, dried coal slime get into the coal pulverizer arrival end of station boiler (1) through elevator (9) and machine for zipper (17) through discharging opening (6);
Hot blast in step 6, the revolving drum drier (7) and flue gas are sent into chimney (12) through air-introduced machine (11) and are discharged in the atmosphere after getting into second deduster (15) dedusting from discharging opening (6).
2. the hot blast of station boiler and the method for flue gas drying coal slime utilized according to claim 1 is characterized in that: in the step 2, reducer for doffer (5) rotating speed is 4 rev/mins.
3. the hot blast of station boiler and the method for flue gas drying coal slime utilized according to claim 1 is characterized in that: in the step 2, reducer for doffer (5) rotating speed is 5 rev/mins.
CN201010553356XA 2010-11-22 2010-11-22 Method for drying coal slime by hot wind and smoke of power station boiler Expired - Fee Related CN101986074B (en)

Priority Applications (1)

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CN201010553356XA CN101986074B (en) 2010-11-22 2010-11-22 Method for drying coal slime by hot wind and smoke of power station boiler

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CN201010553356XA CN101986074B (en) 2010-11-22 2010-11-22 Method for drying coal slime by hot wind and smoke of power station boiler

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CN101986074B true CN101986074B (en) 2012-01-25

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102759118A (en) * 2011-04-29 2012-10-31 中国电力工程顾问集团华北电力设计院工程有限公司 Lignite drum smoke pre-drying power generation integrated system and process
CN102564084A (en) * 2012-03-14 2012-07-11 煤炭工业济南设计研究院有限公司 Low-temperature waste-heat coal slime drying device
CN103225816A (en) * 2013-05-17 2013-07-31 延边石岘白麓纸业股份有限公司 Heat supplying production line
CN103528342B (en) * 2013-08-05 2015-06-24 神华集团有限责任公司 Coal slime drying system and coal slime drying process
CN103604278B (en) * 2013-12-05 2015-12-23 长安大学 Fluidized drying method and apparatus broken up by a kind of machinery of coal slime
CN107388757B (en) * 2017-07-18 2019-12-17 云南中翼鼎东能源科技开发有限公司 Material drying method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE870154L (en) * 1987-01-21 1988-07-21 Bord Na Mona Peat drying apparatus
CN2494964Y (en) * 2001-08-11 2002-06-12 哈尔滨工业大学达通热能工程有限公司 Full-automatic high-moisture raw coal fluidized bed dryer
CN2694125Y (en) * 2003-12-30 2005-04-20 电站锅炉煤清洁燃烧国家工程研究中心 Slime smoke drying device for power station boiler
CN101377379A (en) * 2008-10-08 2009-03-04 东北电力大学 Coal ash drying device
CN201517880U (en) * 2009-09-27 2010-06-30 济南市琦泉热电有限责任公司 Coal slime drying system

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Granted publication date: 20120125

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