CN106635069A - Method for utilizing low-temperature waste heat of circulating gas in coke dry quenching system - Google Patents
Method for utilizing low-temperature waste heat of circulating gas in coke dry quenching system Download PDFInfo
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- CN106635069A CN106635069A CN201610956995.8A CN201610956995A CN106635069A CN 106635069 A CN106635069 A CN 106635069A CN 201610956995 A CN201610956995 A CN 201610956995A CN 106635069 A CN106635069 A CN 106635069A
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- Prior art keywords
- coal
- ball
- heat
- dry quenching
- coking
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/18—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/007—Systems for reclaiming waste heat including regenerators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a method for utilizing low-temperature waste heat of circulating gas in a coke dry quenching system; the method comprises: feeding red coke into a dry quenching furnace, and cooling with circulating inert gas to obtain cold coke; the method is characterized in that latent heat in the circulating inert gas in the dry quenching furnace is recycled via a waste heat boiler, the circulating inert gas is then delivered to a ball heater to heat heat-storing balls, and the circulating insert gas is then sent back into the dry quenching furnace to cool the red coke; coking coal and the heat-storing balls heated by the ball heater are fed into a ball-coal rotary kiln via a ball-coal batch hopper, the coking coal is dried and crushed via the heat-storing balls, the heat-storing balls and broken coking coal are separated via a coal-ball separator, the heat-storing balls are returned to the ball heater for second heating, the broken coking coal is separated by a coal grading screen to obtain coarse coal, fine coal and pulverized coal, the fine coal is fed into a coke furnace for coking. The method has the advantages that the process is simple, waste heat of circulating inert gas can be recycled effectively, coking coal is dried effectively, the service life of equipment is prolonged, smoke dust emission is greatly reduced, and the method is environmentally friendly.
Description
Technical field
The present invention relates to a kind of coal chemical technology, specifically a kind of dry quenching system recyclegas low temperature heat
Method.
Background technology
In dry quenching system, the circulated inert gas of coke are cooled down, after coke dry quenching furnace cooling section carries out heat exchange with red Jiao
Temperature is raised, and Jing ring-shaped flues discharge coke dry quenching furnace；It is laggard that high temperature circulation gas separates coarse granule coke powder through disposable dust remover
Entering coke dry quenching boiler carries out heat exchange, and boiler produces steam, and temperature is down to about 160 DEG C of low-temperature circulating gas by boiler out,
After the further separate fine particles coke powder of secondary filter, feed water preheater is sent into by circulating fan and is cooled to about 130 DEG C, then
Recycle into the cooling of coke dry quenching furnace STRENGTH ON COKE, go out the cold burnt temperature general control of coke dry quenching furnace at 150-200 DEG C, it is cold with these
The low temperature sensible heat (about 0.2GJ/t- is burnt) that Jiao takes away finally is lost in environment.
If can take a step forward reduction charging temperature into coke dry quenching furnace in the gas, its low temperature exhaust heat not only can be reclaimed,
The cold burnt temperature of coke dry quenching furnace can be also reduced out, slows down the cold burnt thermal etching to belt conveyor.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided a kind of process is simple, can effectively reclaim circulation it is lazy
Property gas waste-heat, to coking coal efficient drying, extension device service life, reduce production and cost of investment, flue dust be greatly decreased
Discharge, environment amenable dry quenching system recyclegas low temperature heat method.
Technical scheme includes for red burnt feeding after coke dry quenching furnace is cooled down by circulated inert gas obtaining cold Jiao, goes out following for coke dry quenching furnace
Ring inert gas sends into ball heater and heat-storing sphere is heated Jing after waste heat boiler reclaims sensible heat, is then transmitted back in coke dry quenching furnace
Red Jiao is cooled down；Coking coal and the accumulation of heat ball warp ball-coal batch hopper after the heating of ball heater are sent into into ball-coal revolution
In kiln, broken, the then coking Jing after coal-bulb spacer is isolated heat-storing sphere and crushed is dried to coking coal by heat-storing sphere
Coal, heat-storing sphere is transmitted back to ball heater and heats again, it is broken after the screening of coking coal Jing coals grading separate out rough coal material, duff material and
Fine coal, the duff material sends into coking by coke oven.
The coking coal Jing after festoon drier is predrying again with from ball heater heating after heat-storing sphere together with send into
Ball-coal batch hopper, the dried medium in the festoon drier is the coke oven flue gas from coke oven horizontal flue.
The fine coal that coal grading screening described in Jing is separated out sends into blast furnace blowing coal-hole or pressure ball system.
The circulated inert gas temperature of waste heat boiler is controlled out, and then controls out the coking coal after ball-coal rotary kiln drying
Moisture.
The circulated inert gas temperature for controlling out waste heat boiler is 180-230 DEG C, and then controls out ball-coal rotary kiln drying
Water content drops to below 3wt% in mixed coal afterwards.
The more former moisture of moisture of the coking coal Jing after festoon drier is predrying declines 15-25%.
The heat-storing sphere by steel ball, either make by carbon materials ball or the modified organic material with superior thermal conductivity
Ball.
From dress Jiao's flue dust of coke dry quenching furnace and from coal-bulb spacer, coal bolter and blast furnace blowing coal-hole or pressure ball
The dusty gas of system sends into together ball-coal rotary kiln and takes away after moisture the qualified discharge Jing after deduster dedusting.
Rough coal material Jing balls-coal batch hopper that coal grading screening described in Jing is separated out is returned in ball-coal rotary kiln.
Inventor furthers investigate to the drying process and Dry Quenching Technology of existing coking coal, has made following improvement：
(1) low temperature exhaust heat of the circulated inert gas Jing after residual heat boiler for exchanging heat is made full use of, is sent in ball heater to accumulation of heat
Ball is heated be transmitted back to again red Jiao of cooling in coke dry quenching furnace, and the heat-storing sphere after heating is carried out in ball-coal rotary kiln to coking coal
It is dried and synchronously crushes, the low temperature exhaust heat for making circulated inert gas is effectively reclaimed, and its temperature is further reduced, such that it is able to
Red Jiao of highly efficient cooling, improves cooling effectiveness.(2) coking coal is synchronously crushed drying in ball-coal rotary kiln, is dried effect
It is really good so that the water content of coal declines to a great extent, reduce the yield of coking chemical waste water；(3) in order to further reduce soot emissions,
The airborne dust that ball-coal bolter and coal bolter and the operating unit such as pressure ball system or blast furnace blowing coal-hole are produced, Yi Jigan
The dress burnt flue dust for putting out furnace roof is introduced in ball-coal rotary kiln and takes out of the moisture in kiln, at the same these dusty gases into humidity compared with
In big rotary kiln, the coalescence for being conducive to micronic dust is reunited, and can improve the dust removing effects in later stage, the discharge of PM2.5 is reduced, to environment
It is friendly.
It is preferred that the circulated inert gas temperature for going out boiler more than controlling out is 180-230 DEG C, heat-storing sphere is entered at this temperature
Row heating, can effectively reclaim the waste heat in circulated inert gas, can guarantee that heat-storing sphere in ball-coal rotary kiln to coking coal again
Efficient drying, make the moisture in kiln discharge coking coal drop to below 3wt%.
Present invention process is simple, extend the service life of equipment, is effectively utilized out the circulation indifferent gas of waste heat boiler
The waste heat of body, reclaims sensible heat about 0.2GJ/t- burnt；Drying is synchronously crushed to coking coal in ball-coal rotary kiln using heat-storing sphere,
It is energy-saving；The fume amount of outer row is greatly reduced, the discharge of PM2.5 is reduced, it is environmentally friendly；Improve the drying of coking coal
Effect and efficiency, coal water content is down to less than 3%, is dried heat energy from system hypothermia waste heat, further energy-saving.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
Below in conjunction with the accompanying drawings explanation is further explained to present invention process：Coking coal (water content 10wt%) is first in annular
It is dried by the coke oven flue gas from coke oven horizontal flue in drying machine, water content drops to 7-8wt%, then adds from ball
Heat-storing sphere (temperature is 160-210 DEG C) Jing balls-coal batch hopper sends into ball-coal rotary kiln and is dried broken, refining after hot device heating
Coking coal is broken simultaneously and the drying that exchanges heat by heat-storing sphere, and the water content in coking coal is down to below 3wt%, coking coal and storage after being dried
Together Jing balls-coal bolter isolates heat-storing sphere and coking coal to hot-bulb, and heat-storing sphere is transmitted back to ball heater, and again Jing coals divide coking coal
Level screening separates out rough coal material (particle diameter ＞ 3mm), duff material (a diameter of 0.3-3mm) and fine coal (particle diameter ＜ 0.3mm), described thick
Coal charge Jing balls-coal batch hopper is returned in ball-coal rotary kiln；The duff material to be sent into and obtain red Jiao after coking by coke oven, and red Jiao send
Enter coke dry quenching furnace and obtained cold Jiao after circulated inert gas quenching, the circulated inert gas Jing waste heat boilers for going out the coke dry quenching furnace are reclaimed
Temperature is 180-230 DEG C after sensible heat, is re-fed into cooling down red Jiao in loopback coke dry quenching furnace after ball heater exchanges heat heat-storing sphere；Institute
State fine coal and send into pressure ball system or blast furnace blowing coal-hole.From the ball-coal bolter, coal bolter and pressure ball system or blast furnace
The dusty gas of injection coal-hole sends into ball-coal rotary kiln and takes away dry moisture, then with the wet flue gas one for going out festoon drier
Play qualified discharge after feeding deduster dedusting.
As a example by produce the 6m coke ovens production in 2 55 holes of burnt 1,100,000 tons of Jiao per year, after present invention process, dry putting out is reclaimed
More than burnt system waste heat 0.2GJ/t- Jiao, coking coal enters water content before coke oven and is down to less than 3%, reduces by more than 70% coking
Waste water yield.
Claims (9)
1. a kind of dry quenching system recyclegas low temperature heat method, including by red burnt coke dry quenching furnace of sending into indifferent gas is circulated
Cold Jiao is obtained after body cooling, it is characterised in that the circulated inert gas for going out coke dry quenching furnace send into ball Jing after waste heat boiler reclaims sensible heat
Heater is heated to heat-storing sphere, is then transmitted back in coke dry quenching furnace and red Jiao is cooled down；By coking coal and from ball heating
Accumulation of heat ball warp ball-coal batch hopper after device heating is sent in ball-coal rotary kiln, and coking coal is dried brokenly by heat-storing sphere
It is broken, then Jing coal-bulb spacer isolate heat-storing sphere and it is broken after coking coal, heat-storing sphere is transmitted back to ball heater and adds again
Heat, broken rear coking coal Jing coals grading screening separates out rough coal material, duff material and fine coal, and the duff material sends into coking by coke oven.
2. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1, it is characterised in that described
Coking coal Jing after festoon drier is predrying again with from ball heater heating after heat-storing sphere together with send into ball-coal batch hopper,
Dried medium in the festoon drier is the coke oven flue gas from coke oven horizontal flue.
3. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1 or 2, it is characterised in that
The fine coal that coal grading screening described in Jing is separated out sends into blast furnace blowing coal-hole or pressure ball system.
4. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1, it is characterised in that control
Go out the circulated inert gas temperature of waste heat boiler, and then control out the moisture of the coking coal after ball-coal rotary kiln drying.
5. a kind of dry quenching system recyclegas low temperature heat method as described in claim 1 or 4, it is characterised in that
The circulated inert gas temperature for controlling out waste heat boiler is 180-230 DEG C, and then controls out the cooperation after ball-coal rotary kiln drying
Water content drops to below 3wt% in coal.
6. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 2, it is characterised in that described
The more former moisture of moisture of the coking coal Jing after festoon drier is predrying declines 15-25%.
7. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1 or 2, it is characterised in that
The heat-storing sphere is steel ball either carbon materials ball or ball made by the modified organic material with superior thermal conductivity.
8. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1 or 2, it is characterised in that
From the burnt flue dust of dress of coke dry quenching furnace and containing from coal-bulb spacer, coal bolter and blast furnace blowing coal-hole or pressure ball system
Dust and gas body sends into together ball-coal rotary kiln and takes away after moisture the qualified discharge Jing after deduster dedusting.
9. a kind of dry quenching system recyclegas low temperature heat method as claimed in claim 1, it is characterised in that described
Rough coal material Jing balls-coal batch hopper that coal grading screening is separated out is returned in ball-coal rotary kiln.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019006986A (en) * | 2017-06-20 | 2019-01-17 | 新日鐵住金株式会社 | Method for producing coke |
| CN109442361A (en) * | 2018-09-13 | 2019-03-08 | 西安交通大学 | A kind of integrated system recycled for the efficient step of solid granule waste heat |
| CN110437850A (en) * | 2019-08-23 | 2019-11-12 | 西安华江环保科技股份有限公司 | A kind of double super generating electricity circulating water cooling systems of Dry Quenching |
| CN112207115A (en) * | 2020-09-22 | 2021-01-12 | 武汉科技大学 | Process for cooperatively treating medical waste by utilizing low-temperature pyrolysis dechlorination upgrading coupling cement kiln of hot flue gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019006986A (en) * | 2017-06-20 | 2019-01-17 | 新日鐵住金株式会社 | Method for producing coke |
| JP7047616B2 (en) | 2017-06-20 | 2022-04-05 | 日本製鉄株式会社 | How to make coke |
| CN109442361A (en) * | 2018-09-13 | 2019-03-08 | 西安交通大学 | A kind of integrated system recycled for the efficient step of solid granule waste heat |
| CN109442361B (en) * | 2018-09-13 | 2019-11-08 | 西安交通大学 | A kind of integrated system recycled for the efficient step of solid granule waste heat |
| CN110437850A (en) * | 2019-08-23 | 2019-11-12 | 西安华江环保科技股份有限公司 | A kind of double super generating electricity circulating water cooling systems of Dry Quenching |
| CN112207115A (en) * | 2020-09-22 | 2021-01-12 | 武汉科技大学 | Process for cooperatively treating medical waste by utilizing low-temperature pyrolysis dechlorination upgrading coupling cement kiln of hot flue gas |
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|---|---|
| CN106635069B (en) | 2019-08-06 |
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Effective date of registration: 20230808 Address after: 430000 Steel bar processing workshop in Gonggong Village Street, Qingshan District, Wuhan City, Hubei Province Patentee after: Wuhan Gangshi Environmental Protection Technology Co.,Ltd. Address before: 430083 947 # Heping Avenue, Qingshan, Wuhan, Hubei Province Patentee before: WUHAN University OF SCIENCE AND TECHNOLOGY |
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