CN106566568B - A kind of dry quenching system residual heat and energy method of comprehensive utilization - Google Patents
A kind of dry quenching system residual heat and energy method of comprehensive utilization Download PDFInfo
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- CN106566568B CN106566568B CN201610957404.9A CN201610957404A CN106566568B CN 106566568 B CN106566568 B CN 106566568B CN 201610957404 A CN201610957404 A CN 201610957404A CN 106566568 B CN106566568 B CN 106566568B
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- 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
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Abstract
The invention discloses a kind of dry quenching system residual heat and energy method of comprehensive utilization, including red burnt be sent into after coke dry quenching furnace is cooled down by circulated inert gas is obtained cold coke, cold burnt and heat-storing sphere is sent into ball-coke heat exchanger through ball-coke batch hopper together, utilize cold burnt heat storage ball, then the heat-storing sphere after ball-coke separator isolates coke and heating, heat-storing sphere and coking coal after the heating are sent into ball-coal rotary kiln through ball-coal batch hopper together, it is dry to coking coal row broken using heat-storing sphere, then the coking coal after coal-bulb spacer is isolated heat-storing sphere and is crushed, heat-storing sphere is transmitted back to ball-coke batch hopper, coking coal isolates rough coal material through fluidized bed again after broken, duff material and fine coal, the duff material obtains red coke after being sent into coking by coke oven.Present invention process is simple, can effectively recycle coke waste heat, to coking coal efficient drying, extends service life of equipment, soot emissions are greatly decreased, environmentally friendly.
Description
Technical field
The present invention relates to a kind of coal chemical technologies, specifically a kind of dry quenching system residual heat and energy comprehensive utilization side
Method.
Background technique
Dry coke quenching is the important measures of coke-oven plant's energy-saving and emission-reduction and effective hand of integrated iron and steel works' comprehensive utilization of energy
Section.Traditional coke wet quenching wastes the red a large amount of sensible heats of coke, and every refining 1t coke consumption heat is about 3.15-3.36GJ, wherein coke wet quenching
The heat of waste is 1.49GJ, accounts for about the 37.3-45% of wastage in bulk or weight heat.Compared with coke wet quenching technique, the recyclable benefit of dry coke quenching
With the sensible heat of red coke about 83%, the often dry heat for putting out the recycling of 1t coke is about 1.35GJ.
Although the application of Dry Quenching Technology greatly reduces ton coke energy consumption, there are still about 20% coke sensible heats to fail to have
Effect recycling.It is generally 150-200 DEG C through coke dry quenching furnace cold burnt temperature after cooling, fortune is discharged by the rotary seal valve of coke dry quenching furnace
Burnt belt, the sensible heat about 0.2GJ/t- that the cold coke of the temperature contains is burnt, while the cold coke of the temperature also will cause to burnt belt is transported
Certain thermal etching.
On the other hand, the cooling medium circulated inert gas in dry quenching system will appear flammable during circulating cooling
The enrichment of component needs the inert gas that regular replenishment is new, displaces in order to avoid combustible component is enriched to its explosion ratio range
Part circulated inert gas, replacement amount account for about the 3-4% of the circulating air scale of construction.
Summary of the invention
The purpose of the present invention is to solve above-mentioned technical problem, a kind of simple process is provided, can effectively be recycled more than coke
Heat, to coking coal efficient drying, be greatly decreased soot emissions, a kind of environment amenable comprehensive benefit of dry quenching system residual heat and energy
Use method.
The present invention includes that red burnt be sent into after coke dry quenching furnace is cooled down by circulated inert gas is obtained cold coke, by cold burnt and heat-storing sphere
It is sent into ball-coke heat exchanger through ball-coke batch hopper together, using cold burnt heat storage ball, is then discharged of the coke through ball-coke separator separation
Heat-storing sphere after charcoal and heating, heat-storing sphere and coking coal after the heating are sent into ball-coal rotary kiln through ball-coal batch hopper together
It is interior, it is crushed using heat-storing sphere is dry to coking coal row, then the coking coal after coal-bulb spacer is isolated heat-storing sphere and is crushed,
Heat-storing sphere is transmitted back to ball-coke batch hopper, and broken rear coking coal isolates rough coal material, duff material and fine coal through fluidized bed again, described
Duff material obtains red coke after being sent into coking by coke oven.
Burnt flue dust, the circulated inert gas of release and the coke oven flue gas one from coke oven horizontal flue are filled from coke dry quenching furnace
It rises and is sent into fluidized bed to coking coal after being crushed as fluidizing gas after being disappeared the burnt dirt in quick-fried burner combustion oxygen depleted and part
It fluidized, dried, be classified.
The fine coal is taken out of by fluidizing gas from fluidized bed and through expansion chamber or cyclone dust collectors trapping from fluidizing gas
It separates, is sent into blast furnace blowing coal-hole or pressure ball system.
Contain from ball-coke batch hopper, ball-coke separator, blast furnace blowing coal-hole or pressure ball system and ball-coal separator
Dust and gas body is sent into together in ball-coal rotary kiln take away moisture after be sent into deduster dedusting after qualified discharge.
The fluidizing gas part of expansion chamber or cyclone dust collectors circulation is transmitted back to the detonation burner that disappears out, and rest part is sent into
Qualified discharge after deduster dedusting is sent into after taking away moisture in ball-coal rotary kiln.
The cold Jiao Wendu being discharged by coke dry quenching furnace is controlled, to adjust out ball-coke heat exchanger heat-storing sphere temperature, and then is controlled out
Ball-coal rotary kiln coking coal water content.
The cold burnt temperature for controlling out coke dry quenching furnace is greater than 200 DEG C, less than 250 DEG C, to use the heat-storing sphere temperature of ball heat exchanger
It is 180-230 DEG C, and then controls out ball-coal rotary kiln coking coal water content in 5wt% or less.
Water content drops to 3wt% or less in coking coal after the fluidized bed drying.
The heat-storing sphere is steel ball.
The ball-coke separator is electromagnetic separator.
Inventor fails the technologies such as effective recycling for a large amount of low temperature exhaust heat complementary energy existing for existing Dry Quenching Technology
Problem makes following improvement under the premise of not changing existing dry coke quenching main process: (1) sensible heat of coke is taken full advantage of,
Cold burnt be sent into ball-coke heat exchanger of coke dry quenching furnace out directly heats heat-storing sphere, is then returned using heat-storing sphere in ball-coal
Coking coal is dried in rotary kiln and synchronizes broken, then obtains the sensible heat of cold coke cold burnt separation by ball-coke separator
Effectively recycling；Cold burnt waste heat due to going out coke dry quenching furnace is further recycled, and coke temperature further decreases, to reduce
The thermal damage for transporting burnt belt, extends service life of equipment.(2) former dry quenching system circulated inert gas outlet part is carried out
Recycling enters the detonation burner that disappears, and takes full advantage of the complementary energy of the combustible component contained in the gas；(3) inventor breaches tradition
Wish the lower thinking of the coke temperature come out of the stove, the cold burnt temperature of coke dry quenching furnace out is controlled into get Geng Gao, that is, is greater than 200 DEG C, is less than
On the one hand 250 DEG C of range can reduce the load of coke dry quenching furnace in this way, on the other hand, can obtain the heat-storing sphere of higher temperature,
Be conducive to improve ball-coal rotary kiln drying effect, so that coking coal is gone out ball-coal rotary kiln water content and drop to 3% hereinafter, even
It is lower.(4) in order to be further reduced soot emissions, by ball-coke batch hopper, ball-coke separator, ball-coal bolter, coal bolter
The dusty gas generated with pressure ball system or blast furnace blowing coal-hole, which is introduced into ball-coal rotary kiln, takes the moisture in kiln out of, simultaneously
High humidity environment is conducive to the cohesion of fine dust in kiln, reduces the discharge of dust.
In order to be further reduced soot emissions, by the burnt flue dust of dress from coke dry quenching furnace and the coke oven from coke oven horizontal flue
Flue gas introduces fluidized bed and classification is dried to coking coal, takes away dry moisture when fluidized bed out；Ball-coal bolter is generated
It, can be by the moisture band in kiln in dusty gas and vapor return ball-coal rotary kiln from expansion chamber or cyclone dust collectors
Out, under the moisture effect while in rotary kiln, the fine dust entered in rotary kiln dusty gas is agglomerated, is conducive to
The efficiency of dust collection of subsequent deduster is improved, to realize reduction soot emissions.
Fluidizing gas part after expansion chamber or cyclone dust collectors dedusting is recycled back to feeding fluidized bed, enters stream to stablize
The air circulation for changing bed, improves the operation stability of fluidized bed.The internal circulating load of loopback fluidized bed disappears detonation burner according to entering
The fluctuation situation of gas flow and coke oven flue gas flow is voluntarily adjusted.
Present invention process is simple, extends the service life of equipment, be effectively utilized out the cold coke of coke dry quenching furnace waste heat and
The waste heat and complementary energy of diffused gas recycle sensible heat 0.2GJ/t- coke or more；The exhaust gas volumn of outlet is greatly reduced, PM2.5 is reduced
Discharge, it is environmentally friendly；The drying effect and efficiency of coking coal are improved, coal water content is down to 3% hereinafter, dry thermal energy
It is further energy-saving from system hypothermia waste heat.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Explanation is further explained to present invention process with reference to the accompanying drawing: coking coal (water content 10wt%) and being come from
Heat-storing sphere (180-230 DEG C of temperature) is dried broken through ball-coal batch hopper feeding rotary kiln after the heating of ball-coke heat exchanger,
Coking coal be broken while and heat drying, the water content in coking coal decline most 5-6wt%, then through ball-coal separation screening
Heat-storing sphere and broken rear coking coal, heat-storing sphere loopback ball-coke heat exchanger are separated out, broken rear coking coal is sent into fluidized bed and is further broken
Broken, dry, classification, isolates rough coal material (partial size > 3mm), duff material (partial size 0.3-3mm) and fine coal (partial size <
0.3mm), the rough coal material loopback ball-coal rotary kiln, the duff material obtain red coke after being sent into coking by coke oven；The red coke is sent
Enter to obtain the cold coke that temperature is greater than 200 DEG C (preferably more than 250 DEG C), the cold coke after coke dry quenching furnace is cooled down by circulated inert gas
It is sent into ball-coke heat exchanger through ball-coke batch hopper to heat heat-storing sphere, then after ball-coke heat exchanger isolates heating
Heat-storing sphere and coke, the heat-storing sphere are sent into ball-coal batch hopper.The circulation indifferent gas of the burnt flue dust of dress, release from coke dry quenching furnace
Body and coke oven flue gas from coke oven horizontal flue are disappeared conduct after the burnt dirt of quick-fried burner combustion oxygen depleted and part together
Fluidizing gas is sent into fluidized bed and is fluidized, dried, be classified to broken rear coking coal.The fluidizing gas come out from the fluidized bed
The fine coal taken out of is sent into pressure ball system or blast furnace blowing coal-hole after expansion chamber or cyclone dust collectors trapping are separated；It sinks out
The gas part loopback of drop room or cyclone dust collectors disappears detonation burner, rest part and separates from ball-coke batch hopper, ball-coke
Device, blast furnace blowing coal-hole or pressure ball system and ball-coal bolter dusty gas be sent into ball-coal rotary kiln together take away it is wet
Qualified discharge after feeding deduster dedusting after gas.
For producing the 6m coke oven production in 55 hole of burnt 1,100,000 tons of burnt 2 per year, after present invention process, dry put out is recycled
More than burnt system waste heat about 0.2GJ/t- coke, coking coal is down to 3% hereinafter, reducing by 70% or more coke into water content before coke oven
Change waste water yield.
Claims (10)
1. a kind of dry quenching system residual heat and energy method of comprehensive utilization, including red burnt feeding coke dry quenching furnace is cold by circulated inert gas
But cold coke is obtained afterwards, which is characterized in that cold burnt and heat-storing sphere is sent into ball-coke heat exchanger through ball-coke batch hopper together, utilization is cold
Burnt heat storage ball, the then heat-storing sphere after ball-coke separator isolates coke and heating, heat-storing sphere after the heating and
Coking coal is sent into ball-coal rotary kiln through ball-coal batch hopper together, dry to coking coal row broken using heat-storing sphere, is then passed through
Coal-bulb spacer isolates heat-storing sphere and broken rear coking coal, and heat-storing sphere is transmitted back to ball-coke batch hopper, is crushed rear coking coal again
Rough coal material, duff material and fine coal are isolated through fluidized bed, the duff material obtains red coke after being sent into coking by coke oven.
2. dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1, which is characterized in that from coke dry quenching furnace
Burnt flue dust, the circulated inert gas of release and the coke oven flue gas from coke oven the horizontal flue quick-fried burner combustion that disappeared together is filled to disappear
It is used as fluidizing gas feeding fluidized bed to be fluidized, dried, be classified to broken rear coking coal after consuming oxygen and partially burnt dirt.
3. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1 or 2, which is characterized in that the fine coal
It is taken out of from fluidized bed by fluidizing gas and is separated from fluidizing gas through expansion chamber or cyclone dust collectors trapping, be sent into blast furnace
It is blown coal-hole or pressure ball system.
4. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 3, which is characterized in that match from ball-coke
Hopper, ball-coke separator, blast furnace blowing coal-hole or pressure ball system and ball-coal separator dusty gas are sent into ball-coal together
Qualified discharge after deduster dedusting is sent into after taking away moisture in rotary kiln.
5. dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1 or 4, which is characterized in that go out expansion chamber
Or the fluidizing gas part circulation of cyclone dust collectors is transmitted back to the detonation burner that disappears, rest part is sent into ball-coal rotary kiln and is taken away
Qualified discharge after feeding deduster dedusting after moisture.
6. dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1, which is characterized in that control is by coke dry quenching furnace
The cold Jiao Wendu of discharge, to adjust out ball-coke heat exchanger heat-storing sphere temperature, and then controls out ball-coal rotary kiln coking coal
Water content.
7. dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1 or 6, which is characterized in that control out and do
The cold burnt temperature for putting out furnace is greater than 200 DEG C, less than 250 DEG C, to improve out ball-coke heat exchanger heat-storing sphere temperature as 180-230 DEG C,
And then ball-coal rotary kiln coking coal water content is controlled out in 5wt% or less.
8. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 2, which is characterized in that through the fluidized bed
Water content drops to 3wt% or less in coking coal after drying.
9. dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1, which is characterized in that the heat-storing sphere is
Steel ball.
10. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1 or 2, which is characterized in that the ball-
Burnt separator is electromagnetic separator.
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| CN110813006A (en) * | 2019-12-02 | 2020-02-21 | 中冶焦耐(大连)工程技术有限公司 | Waste gas waste heat recovery and purification process of coke oven gas heating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608125A (en) * | 2009-07-09 | 2009-12-23 | 神华集团有限责任公司 | A kind of method for upgrading coal pyrolysis |
| CN102206496A (en) * | 2011-04-19 | 2011-10-05 | 山东理工大学 | Pyrolysis and liquidation system for heating biomass by using solid heat storage ball |
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| JP5336018B1 (en) * | 2012-07-23 | 2013-11-06 | 新日鉄住金エンジニアリング株式会社 | Method for producing coke for gasification melting furnace, and method for using coke |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608125A (en) * | 2009-07-09 | 2009-12-23 | 神华集团有限责任公司 | A kind of method for upgrading coal pyrolysis |
| CN102206496A (en) * | 2011-04-19 | 2011-10-05 | 山东理工大学 | Pyrolysis and liquidation system for heating biomass by using solid heat storage ball |
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Effective date of registration: 20200520 Address after: 467500 Ru'nan Industrial Zone, Pingdingshan, Henan, Ruzhou Patentee after: RUZHOU TIANRUI COKING Co.,Ltd. Address before: 430083 No. 947, Heping Avenue, Qingshan, Wuhan City, Hubei Province Patentee before: WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY |
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