CN101693843A - Coal steam rotating moisture control process system and method thereof - Google Patents
Coal steam rotating moisture control process system and method thereof Download PDFInfo
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- CN101693843A CN101693843A CN 200910180612 CN200910180612A CN101693843A CN 101693843 A CN101693843 A CN 101693843A CN 200910180612 CN200910180612 CN 200910180612 CN 200910180612 A CN200910180612 A CN 200910180612A CN 101693843 A CN101693843 A CN 101693843A
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Abstract
The invention relates to a coal steam rotating moisture control process system and a method thereof, solving the problems of complex process, high investment, high energy consumption and the like in the low volatile, larger-grain and unexplosive coal dry process, and having the advantages of simple process, low investment, energy conservation, environment protection and the like. The structure of the coal steam rotating moisture control process system comprises a rotary dryer with a steam pipe, wherein the material feeding end of the rotary dryer is connected with a material feeder while the material discharging end thereof is respectively connected with a conveyer and a dust remover, the rotary dryer is respectively connected with a steam main heat source device and a flue gas assistant heat source device, and the dust remover is also connected with the conveyer.
Description
Technical field
The present invention relates to the damping pretreatment technology of coal in the coking industry, be applicable to the steam rotating moisture control process system and the method thereof of low-volatile, non-explosive coal.
Background technology
The thermal source that the steam rotary conditioning technique of coal uses mainly contains two kinds, and a kind of is to utilize low-pressure steam after coke-oven plant's dry coke quenching steam-electric power or other low-pressure steam as thermal source.Another kind is the production waste heat that utilizes the coke-oven plant, and the steam that produces with the upcast apparatus for vapour-cooling is main thermal source, is auxiliary thermal source with the sensible heat of raw gas or stack gases.The coal humidifying technology of doing thermal source with steam now extensively adopts nitrogen as taking humid gas and protection gas, and all seals adopt nitrogen-sealed, and adopt the operational path (seeing Chinese patent 200610069005.5) of nitrogen closed cycle.This processing method is very suitable for the drying of high-volatile, fine particle, explosive coal.And, use this technology then to exist weak points such as complex process, investment are big, energy consumption height for the drying of low-volatile, larger particles, non-explosive coal.
Summary of the invention
The present invention is directed to the dry problem of low-volatile, larger particles, non-explosive coal, provide a kind of steam that utilizes to do the steam rotating moisture control process system method that main thermal source, stack gas are done the coal of auxiliary thermal source, solved problems such as the complex process, the investment that exist in low-volatile, larger particles, the non-explosive coal drying are big, energy consumption height, this steam rotary coal humidifying technology has advantages such as technology is simple, investment is little, energy-conserving and environment-protective.
For achieving the above object, the present invention adopts following technical scheme:
A kind of steam rotating moisture control process system of coal, it comprises the rotary dryer that has vapour pipe, the rotary dryer feed end is connected with feeding device, discharge end is connected with e Foerderanlage, the discharge end of rotary dryer also is connected with cleaning apparatus simultaneously, described rotary dryer is connected with stack gas auxiliary thermal source device with steam main heat source device respectively, and cleaning apparatus also is connected with e Foerderanlage.
Described steam main heat source device is a saturation steam, and the vapour pipe in saturation steam and the rotary dryer is connected the total pipe coupling of vapour pipe and water of condensation.
Described stack gas auxiliary thermal source device comprises hot flue gases, it contacts with wet coal with directly sending in the rotary dryer by gas blower, and the moisture that is evaporated with wet coal and parts of fine coal dust enter cleaning apparatus and carry out coal dust and separate, and cleaning apparatus then is connected with chimney by recirculation blower.
Described feeding device comprises loading hopper, and loading hopper is connected with quantitative auger, and quantitatively auger is connected with rotary dryer.
Described e Foerderanlage comprises conveying auger and the belt conveyor that connects successively, and conveying auger is connected with the discharge end of rotary dryer.
Described cleaning apparatus is a sack cleaner, and sack cleaner is connected with the conveying auger of e Foerderanlage by lock wind discharge valve II, and sack cleaner also is connected with high pressure nitrogen.
A kind of damping method of steam rotating moisture control process system of coal, its step is:
(1) feed coal is sent into rotary dryer by feeding device;
(2) saturation steam enters as main heat source in the vapour pipe of steam rotary dryer, and the coal dust of sending into is carried out drying, and the water of condensation exhaust vapour rotary dryer that forms in the drying process enters the water of condensation house steward;
(3) adopt raw gas or hot flue gases as auxiliary thermal source, hot flue gases enters rotary dryer under the effect of gas blower, in drying machine, directly contact with wet coal, and carry moisture and the parts of fine coal dust that wet coal is evaporated and leave rotary dryer together, enter sack cleaner, coal dust is separated in sack cleaner, and hot flue gases gas directly enters in the atmosphere through the force feed of recirculation blower by chimney;
(4) at the rotary dryer discharge end, the raw material moisture in coal to rated value, is sent into conveying auger by damping; Simultaneously, the material after sack cleaner separates also drops to conveying auger through lock wind discharge valve II, and material is sent to coke oven coal tower through belt conveyor then.
The oxygen level of hot flue gases is not higher than 9% in the described step (3).
Technical scheme of the present invention is:
1, material flow: the feed coal after fragmentation is delivered to steam rotary dryer through loading hopper by quantitative auger, in dryer inner, vapour pipe in raw material and the drying machine carries out heat exchange, moisture in the feed coal constantly evaporates, at steam rotary dryer discharge port position, the raw material moisture in coal to rated value, is fallen into conveying auger through lock wind discharge valve by damping (drying), deliver to belt conveyor, deliver to coke oven coal tower at last.What the drying machine exhaust was carried secretly enters sack cleaner than fine breeze, separates after high pressure nitrogen purges, and the material after the separation drops to the coking coal belt conveyor through lock wind discharge valve, is sent to coke oven coal tower with discharging the outer damping coal of drying machine.
2, stack gas flow process: the sensible heat that adopts raw gas or hot flue gases is as auxiliary thermal source.Hot flue gases enters drying machine under the effect of gas blower, the oxygen level of stack gas is less demanding in 9%, contacts with wet coal in drying machine, and carries moisture and the parts of fine coal dust that wet coal is evaporated and leave drying machine together, enter sack cleaner, coal dust is separated in fly-ash separator.Stack gas is directly entered in the atmosphere by chimney through the force feed of recirculation blower.
3, steam flow: adopt saturation steam as main thermal source.Saturation steam enters in the vapour pipe of steam rotary dryer, and coal dust is carried out drying, and the water of condensation that forms in the drying process is discharged drying machine, enters the water of condensation house steward.
Beneficial effect of the present invention is:
1, adopt steam and stack gas as thermal source, steam is as the main source that heat is provided, and stack gas is as the auxiliary source that heat is provided, it mainly acts on is to take away the moisture that removes in the feed coal, so it is little to discharge the air quantity of drying machine, dust is few, and the dust removal installation load is little;
2, adopt raw gas or hot flue gases as taking humid gas, made full use of the heat in the waste gas, use for dry, effects of energy conservation and environmental protection is remarkable.
3, this technological process is simple, and total system is easy to operate, operating safety, maintenance capacity are little.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Wherein, 1 feed coal, 2 loading hoppers, 3 quantitative augers, 4 hot flue gases, 5 gas blowers, 6 rotary dryers, 7 lock wind discharge valve I, 8 conveying augers, 9 water of condensation house stewards, 10 belt conveyors, 11 lock wind discharge valve II, 12 sack cleaners, 13 chimneys, 14 recirculation blowers, 15 saturation steams, 16 high pressure nitrogens.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
1, material flow: the feed coal 1 after fragmentation is delivered to steam rotary dryer 6 through loading hopper 2 by quantitative auger 3, in rotary dryer 6 inside, vapour pipe in raw material and the rotary dryer 6 carries out heat exchange, moisture in the feed coal constantly evaporates, at steam rotary dryer 6 discharge ends, to rated value, I7 falls into conveying auger 8 to the raw material moisture in coal through lock wind discharge valve by damping (drying), deliver to belt conveyor 10, deliver to coke oven coal tower at last.What rotary dryer 6 exhausts were carried secretly enters sack cleaner 12 than fine breeze, after purging, separates high pressure nitrogen 16, material after the separation drops to conveying auger 8 through lock wind discharge valve II11, is sent to coke oven coal tower with discharging rotary dryer 6 outer damping coals.
2, stack gas flow process: the sensible heat that adopts raw gas or hot flue gases 4 is as auxiliary thermal source.Hot flue gases 4 enters drying machine under the effect of gas blower 5, the oxygen level of stack gas is less demanding in 9%, contacts with wet coal in drying machine, and carries moisture and the parts of fine coal dust that wet coal is evaporated and leave drying machine together, enter sack cleaner 12, coal dust is separated in fly-ash separator.Stack gas is directly entered in the atmosphere by chimney 13 through the force feed of recirculation blower 14.
3, steam flow: adopt saturation steam 15 as main thermal source.Saturation steam 15 enters in the vapour pipe of steam rotary dryer 6, and coal dust is carried out drying, and the water of condensation that forms in the drying process is discharged drying machine, enters water of condensation house steward 9.
Claims (8)
1. the steam rotating moisture control process system of a coal, it comprises the rotary dryer (6) that has vapour pipe, rotary dryer (6) feed end is connected with feeding device, discharge end is connected with e Foerderanlage, the discharge end of rotary dryer (6) also is connected with cleaning apparatus simultaneously, it is characterized in that described rotary dryer (6) is connected with stack gas auxiliary thermal source device with steam main heat source device respectively, cleaning apparatus also is connected with e Foerderanlage.
2. the steam rotating moisture control process system of coal as claimed in claim 1 is characterized in that, described steam main heat source device is saturation steam (15), and the vapour pipe in saturation steam (15) and the rotary dryer (6) is connected, and vapour pipe is connected with water of condensation house steward (9).
3. the steam rotating moisture control process system of coal as claimed in claim 1, it is characterized in that, described stack gas auxiliary thermal source device comprises hot flue gases (4), it contacts with wet coal with directly sending in the rotary dryer (6) by gas blower (5), and the moisture that is evaporated with wet coal and parts of fine coal dust enter cleaning apparatus and carry out coal dust and separate, and cleaning apparatus then is connected with chimney (13) by recirculation blower (14).
4. the steam rotating moisture control process system of coal as claimed in claim 1 is characterized in that, described feeding device comprises loading hopper (2), and loading hopper (2) is connected with quantitative auger (3), and quantitatively auger (3) is connected with rotary dryer (6).
5. the steam rotating moisture control process system of coal as claimed in claim 1 is characterized in that, described e Foerderanlage comprises conveying auger (8) and the belt conveyor (10) that connects successively, and conveying auger (8) is connected with the discharge end of rotary dryer (6).
6. as the steam rotating moisture control process system of claim 1 or 5 described coals, it is characterized in that, described cleaning apparatus is sack cleaner (12), sack cleaner (12) is connected with the conveying auger (8) of e Foerderanlage by lock wind discharge valve II (11), and sack cleaner (12) also is connected with high pressure nitrogen (16).
7. the damping method of the steam rotating moisture control process system of the described coal of claim 1 is characterized in that, its step is:
(1) feed coal (1) is sent into rotary dryer (6) by feeding device;
(2) saturation steam enters as main heat source in the vapour pipe of steam rotary dryer (6), and the coal dust of sending into is carried out drying, and the water of condensation exhaust vapour rotary dryer (6) that forms in the drying process enters water of condensation house steward (9);
(3) adopt raw gas or hot flue gases (4) as auxiliary thermal source, hot flue gases (4) enters rotary dryer (6) under the effect of gas blower (5), in drying machine, directly contact with wet coal, and carry moisture and the parts of fine coal dust that wet coal is evaporated and leave rotary dryer (6) together, enter sack cleaner (12), coal dust is separated in sack cleaner (12) lining, and hot flue gases (4) gas directly enters in the atmosphere through the force feed of recirculation blower (14) by chimney (13);
(4) at rotary dryer (6) discharge end, moisture to rated value, is sent into conveying auger (8) by damping in the feed coal (1); Simultaneously, the material after sack cleaner (12) separates also drops to conveying auger (8) through lock wind discharge valve II (11), and material is sent to coke oven coal tower through belt conveyor (10) then.
8. the damping method of the steam rotating moisture control process system of coal as claimed in claim 7 is characterized in that, the oxygen level of hot flue gases (4) is not higher than 9% in the described step (3).
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Cited By (8)
| 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 |
| CN102492447A (en) * | 2011-12-17 | 2012-06-13 | 无锡亿恩科技股份有限公司 | Coking coal damping process for internal-heating type forced heat transferring fluidized bed |
| CN102604660A (en) * | 2012-03-13 | 2012-07-25 | 钢铁研究总院 | Moisture control grading system and moisture control grading method for materials |
| CN102650493A (en) * | 2012-05-21 | 2012-08-29 | 山东天力干燥股份有限公司 | Device and technology for drying lignite by jointly using rotary steam tubes and high frequency |
| CN102732278A (en) * | 2011-04-13 | 2012-10-17 | 天华化工机械及自动化研究设计院 | Method for humidifying coal by coke oven coking revolving drum drier and its apparatus |
| CN102847383A (en) * | 2011-06-30 | 2013-01-02 | 宝山钢铁股份有限公司 | Dedusting method and system for coal moisture control |
| CN104140837A (en) * | 2013-05-10 | 2014-11-12 | 中冶焦耐(大连)工程技术有限公司 | Thermal conduction molded coal moisturizing method with coke oven tail gas as carrying gas, and apparatus thereof |
| CN109631503A (en) * | 2018-11-27 | 2019-04-16 | 武汉钢铁有限公司 | Coal humidifying technology residual-heat utilization method and its device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220953A1 (en) * | 1992-06-26 | 1994-01-05 | Metallgesellschaft Ag | Process for drying water-containing solids in a fluidized bed |
| CN2903065Y (en) * | 2006-03-10 | 2007-05-23 | 首钢总公司 | Drying apparatus of coke oven tunnel flue |
| CN100443840C (en) * | 2006-09-20 | 2008-12-17 | 山东天力干燥设备有限公司 | High volatile coal dust rotary drying process |
| CN101372625A (en) * | 2008-10-24 | 2009-02-25 | 攀枝花新钢钒股份有限公司 | Method for controlling coking coal dampness |
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2009
- 2009-10-27 CN CN 200910180612 patent/CN101693843B/en active Active
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 |
| CN102732278A (en) * | 2011-04-13 | 2012-10-17 | 天华化工机械及自动化研究设计院 | Method for humidifying coal by coke oven coking revolving drum drier and its apparatus |
| CN102847383A (en) * | 2011-06-30 | 2013-01-02 | 宝山钢铁股份有限公司 | Dedusting method and system for coal moisture control |
| CN102847383B (en) * | 2011-06-30 | 2016-01-20 | 宝山钢铁股份有限公司 | A kind of coal damping dust collection method and system |
| CN102492447A (en) * | 2011-12-17 | 2012-06-13 | 无锡亿恩科技股份有限公司 | Coking coal damping process for internal-heating type forced heat transferring fluidized bed |
| CN102604660A (en) * | 2012-03-13 | 2012-07-25 | 钢铁研究总院 | Moisture control grading system and moisture control grading method for materials |
| CN102604660B (en) * | 2012-03-13 | 2013-12-25 | 钢铁研究总院 | Moisture control grading system and moisture control grading method for materials |
| CN102650493A (en) * | 2012-05-21 | 2012-08-29 | 山东天力干燥股份有限公司 | Device and technology for drying lignite by jointly using rotary steam tubes and high frequency |
| CN102650493B (en) * | 2012-05-21 | 2014-05-28 | 山东天力干燥股份有限公司 | Device and technology for drying lignite by jointly using rotary steam tubes and high frequency |
| CN104140837A (en) * | 2013-05-10 | 2014-11-12 | 中冶焦耐(大连)工程技术有限公司 | Thermal conduction molded coal moisturizing method with coke oven tail gas as carrying gas, and apparatus thereof |
| CN109631503A (en) * | 2018-11-27 | 2019-04-16 | 武汉钢铁有限公司 | Coal humidifying technology residual-heat utilization method and its device |
| CN109631503B (en) * | 2018-11-27 | 2020-11-24 | 武汉钢铁有限公司 | Coal moisture control process waste heat utilization method and device |
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