CN106566568A - Waste heat and remained energy comprehensive utilization method of coke dry quenching system - Google Patents
Waste heat and remained energy comprehensive utilization method of coke dry quenching system Download PDFInfo
- Publication number
- CN106566568A CN106566568A CN201610957404.9A CN201610957404A CN106566568A CN 106566568 A CN106566568 A CN 106566568A CN 201610957404 A CN201610957404 A CN 201610957404A CN 106566568 A CN106566568 A CN 106566568A
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- ball
- coal
- coke
- heat
- dry quenching
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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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- 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
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a waste heat and remained energy comprehensive utilization method of a coke dry quenching system. The method comprises the following steps: conveying red coke into a dry quenching furnace, cooling the red coke by circulating inert gas to obtain cold coke, conveying the cold coke and a heat accumulation ball together into a ball-coke heat exchanger through a ball-coke batch hopper, heating the heat accumulation ball through the cold coke, separating coke and the heated heat accumulation ball through a ball-coke separator, conveying the heated heat accumulation ball and coking coal together into a ball-coal rotary kiln through a ball-coal batch hopper, drying and crushing the coking coal through the heat accumulation ball, then separating the heat accumulation ball and crushed coking coal through a coal-ball separator, conveying the heat accumulation ball back into the ball-coke batch hopper, separating coarse coal particles, fine coal particles and coal powder from the crushed coking coal through a fluidized bed, and conveying the fine coal particles into a coke oven for coking to obtain red coke. According to the method, the process is simple, the waste heat of coke can be effectively recycled, the coking coal can be effectively dried, the service life of equipment is prolonged, smoke dust discharging is substantially reduced, and the method is environment-friendly.
Description
Technical field
The present invention relates to a kind of coal chemical technology, specifically a kind of dry quenching system residual heat and energy comprehensive utilization side
Method.
Background technology
Dry coke quenching is the important measures of coke-oven plant's energy-saving and emission-reduction, and effective handss of integrated iron and steel works' comprehensive utilization of energy
Section.Traditional coke wet quenching wastes red burnt a large amount of sensible heats, often refines 1t coke consumption heats and is about 3.15-3.36GJ, wherein coke wet quenching
The heat of waste is 1.49GJ, accounts for the 37.3-45% of wastage in bulk or weight heat.Compared with coke wet quenching technique, the recyclable profit of dry coke quenching
With red burnt about 83% sensible heat, the often dry heat for putting out the recovery of 1t coke is about 1.35GJ.
Although the application of Dry Quenching Technology greatly reduces ton Jiao's energy consumption, still suffer from about 20% coke sensible heat and fail to have
Effect is reclaimed.Generally 150-200 DEG C of cold burnt temperature Jing after coke dry quenching furnace cooling, is discharged into fortune by the rotary seal valve of coke dry quenching furnace
Burnt belt, the sensible heat about 0.2GJ/t- that cold Jiao of the temperature is contained are burnt, while the cold burnt of the temperature can be also caused to the burnt belt of fortune
Certain thermal etching.
On the other hand, the cooling medium circulated inert gas in dry quenching system occur flammable during circulating cooling
The enrichment of component, in order to avoid combustible component is enriched to its explosion ratio scope, needs the noble gases that regular replenishment is new, displaces
Part circulated inert gas, its replacement amount account for the 3-4% of the circulating air scale of construction.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided more than a kind of process is simple, energy efficient recovery coke
Heat, to coking coal efficient drying, soot emissions are greatly decreased, a kind of comprehensive profit of environment amenable dry quenching system residual heat and energy
Use method.
The present invention includes for red burnt feeding after coke dry quenching furnace is cooled down by circulated inert gas obtaining cold Jiao, by cold burnt and heat-storing sphere
Jing balls-Jiao's batch hopper sends into ball-Jiao's heat exchanger together, and using cold burnt heat storage ball, then Jing balls-Jiao's separator separation is discharged of the coke
Heat-storing sphere after charcoal and heating, Jing balls-coal batch hopper sends into ball-coal rotary kiln to the heat-storing sphere and coking coal after the heating together
It is interior, coking coal row is dried using heat-storing sphere and is crushed, then the coking coal Jing after coal-bulb spacer is isolated heat-storing sphere and crushed,
Heat-storing sphere is transmitted back to ball-Jiao's batch hopper, and after crushing, Jing fluid beds isolate rough coal material, duff material and fine coal to coking coal again, described
Duff material obtains red Jiao after sending into coking by coke oven.
From the burnt flue dust of the dress of coke dry quenching furnace, the circulated inert gas for diffusing and the coke oven flue gas one from coke oven horizontal flue
Rise Jing after the burnt dirt of quick-fried burner combustion oxygen depleted and part that disappears and fluid bed is sent into as fluidizing gas to coking coal after broken
Carry out fluidizing, be dried, be classified.
The fine coal is taken out of from fluid bed by fluidizing gas and Jing expansion chambers or cyclone dust extractor are trapped from fluidizing gas
Separate, send into blast furnace blowing coal-hole or pressure ball system.
From containing for ball-Jiao's batch hopper, ball-Jiao's separator, blast furnace blowing coal-hole or pressure ball system and ball-coal separator
Dust and gas body being sent into after take away in ball-coal rotary kiln dampness in the lump and sending into qualified discharge after cleaner unit dedusting.
The fluidizing gas part circulation for going out expansion chamber or cyclone dust extractor is transmitted back to the detonation burner that disappears, and remainder is sent into
Qualified discharge after cleaner unit dedusting is sent into after dampness is taken away in ball-coal rotary kiln.
The cold burnt temperature discharged by coke dry quenching furnace is controlled, to adjust out the heat-storing sphere temperature of ball-Jiao's heat exchanger, and then is controlled out
The water content of ball-coal rotary kiln coking coal.
The cold burnt temperature of coke dry quenching furnace is controlled out more than 200 DEG C, more than 250 DEG C, to improve out the heat-storing sphere temperature of ball heat exchanger
Spend for 180-230 DEG C, and then the coking coal water content of ball-coal rotary kiln is controlled out in below 5wt%.
In coking coal after the fluid bed drying described in, water content drops to below 3wt%.
The heat-storing sphere is steel ball.
The ball-Jiao's separator is electromagnetic separator.
Inventor fails the technologies such as effective recycling for a large amount of low temperature exhaust heat complementary energy that existing Dry Quenching Technology is present
Problem, on the premise of existing dry coke quenching main process is not changed, makes following improvement：(1) sensible heat of coke is taken full advantage of,
Cold burnt the feeding in ball-Jiao's heat exchanger for going out coke dry quenching furnace is directly heated to heat-storing sphere, is then returned in ball-coal using heat-storing sphere
Coking coal is dried and is synchronously crushed in rotary kiln, then by ball-Jiao's separator by cold burnt separation, obtain the sensible heat of cold Jiao
Efficient recovery；As the cold burnt waste heat for going out coke dry quenching furnace is further reclaimed, coke temperature is further reduced, so as to reduce
The hot injury of the burnt belt of fortune, extends service life of equipment.(2) row part outside former dry quenching system circulated inert gas is carried out
Reclaim and enter the detonation burner that disappears, the complementary energy of the combustible component contained in taking full advantage of the gas；(3) inventor breaches tradition
Wish the lower thinking of the coke temperature come out of the stove, cold burnt temperature control get Geng Gao of coke dry quenching furnace will be gone out, i.e., more than 200 DEG C, be less than
On the one hand 250 DEG C of scope, so can reduce the load of coke dry quenching furnace, on the other hand, it is possible to obtain the heat-storing sphere of higher temperature,
Be conducive to improving the drying effect of ball-coal rotary kiln, make the water content that coking coal goes out ball-coal rotary kiln drop to less than 3%, or even
It is lower.(4) in order to further reduce soot emissions, by ball-Jiao's batch hopper, ball-Jiao's separator, ball-coal bolter, coal bolter
The dusty gas produced with pressure ball system or blast furnace blowing coal-hole is introduced in ball-coal rotary kiln to be taken out of the dampness in kiln, while
In kiln, high humidity environment is conducive to the cohesion of fine dust, reduces the discharge of dust.
In order to further reduce soot emissions, by the burnt flue dust of dress and the coke oven from coke oven horizontal flue from coke dry quenching furnace
Flue gas introduces fluid bed and classification is dried to coking coal, takes away and be dried dampness when going out fluid bed；Ball-coal bolter is produced
Dusty gas and in the vapor return ball-coal rotary kiln of expansion chamber or cyclone dust extractor, can be by the dampness band in kiln
Go out, while under the dampness effect in rotary kiln, making that cohesion occurs into the fine dust in rotary kiln dusty gas, being conducive to
The efficiency of dust collection of follow-up cleaner unit is improved, so as to realize reducing soot emissions.
Fluidizing gas part Jing after expansion chamber or cyclone dust extractor dedusting loops back feeding fluid bed, stably to enter to become a mandarin
Change the air circulation of bed, improve the operation stability of fluid bed.The circulating load of loopback fluid 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, extend the service life of equipment, be effectively utilized out the cold burnt waste heat of coke dry quenching furnace and
The waste heat and complementary energy of diffused gas, reclaim sensible heat 0.2GJ/t- it is burnt more than；The exhaust gas volumn of outer row is greatly reduced, PM2.5 is reduced
Discharge, it is environmentally friendly；The drying effect and efficiency of coking coal are improve, coal water content is down to less than 3%, is dried heat energy
It is from system hypothermia waste heat, further energy-saving.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
Explanation is further explained to present invention process below in conjunction with the accompanying drawings：Coking coal (water content is 10wt%) and from
Heat-storing sphere (temperature 180-230 DEG C) Jing balls after the heating of ball-Jiao's heat exchanger-coal batch hopper send into rotary kiln be dried it is broken,
Coking coal is broken while and heat drying, the water content decline most 5-6wt% in coking coal, then Jing balls-coal separate screening
Heat-storing sphere and broken rear coking coal are separated out, heat-storing sphere loopback ball-Jiao's heat exchanger, broken rear coking coal are sent into fluid bed and further broken
Broken, dry, classification, isolates rough coal material (particle diameter ＞ 3mm), duff material (particle diameter is 0.3-3mm) and fine coal (particle diameter ＜
0.3mm), the rough coal material loopback ball-coal rotary kiln, the duff material obtain red Jiao after sending into coking by coke oven；Red Jiao send
Enter and after coke dry quenching furnace is cooled down by circulated inert gas, obtain cold Jiao of the temperature more than 200 DEG C (preferably more than 250 DEG C), cold Jiao
Jing balls-Jiao's batch hopper is sent into ball-Jiao's heat exchanger and heat-storing sphere is heated, then Jing after ball-Jiao's heat exchanger isolates heating
Heat-storing sphere and coke, the heat-storing sphere send into ball-coal batch hopper.From the burnt flue dust of the dress of coke dry quenching furnace, the circulation indifferent gas for diffusing
Body and the coke oven flue gas conduct Jing after the burnt dirt of quick-fried burner combustion oxygen depleted and part that disappears together from coke oven horizontal flue
Fluidizing gas is sent into fluid bed and broken rear coking coal is carried out fluidizing, is dried, is classified.From fluid bed fluidizing gas out
The fine coal taken out of sends into pressure ball system or blast furnace blowing coal-hole Jing after expansion chamber or cyclone dust extractor trapping are separated；It is heavy to go out
The gas part loopback of drop room or cyclone dust extractor disappears detonation burner, remainder and from ball-Jiao batch hopper, ball-Jiao's separation
The dusty gas of device, blast furnace blowing coal-hole or pressure ball system and ball-coal bolter send into together take away in ball-coal rotary kiln it is wet
Qualified discharge after cleaner unit dedusting is sent into after gas.
By taking the 6m coke ovens production for producing 55 hole of burnt 1,100,000 tons of burnt 2 per year as an example, after present invention process, dry putting out is reclaimed
More than burnt system waste heat about 0.2GJ/t- is burnt, before coking coal enters coke oven, water content is down to less than 3%, reduces by more than 70% Jiao
Change waste water yield.
Claims (10)
1. a kind of dry quenching system residual heat and energy method of comprehensive utilization, including will red burnt to send into coke dry quenching furnace cold by circulated inert gas
But cold Jiao is obtained afterwards, it is characterised in that cold burnt and heat-storing sphere together Jing balls-Jiao's batch hopper is sent into into ball-Jiao's heat exchanger, using cold
Burnt heat storage ball, then Jing ball-Jiao's separator isolate coke and heating after heat-storing sphere, the heat-storing sphere after the heating and
Send into ball-coal rotary kiln in together by Jing balls-coal batch hopper for coking coal, and broken, Ran Houjing is dried to coking coal row using heat-storing sphere
Coal-bulb spacer isolates heat-storing sphere and broken rear coking coal, and heat-storing sphere is transmitted back to ball-Jiao's batch hopper, crushes rear coking coal again
Jing fluid beds isolate rough coal material, duff material and fine coal, and the duff material obtains red Jiao after sending into coking by coke oven.
2. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1, it is characterised in that from coke dry quenching furnace
The Jing quick-fried burner combustions that disappear disappear together for the burnt flue dust of dress, the circulated inert gas for diffusing and the coke oven flue gas from coke oven horizontal flue
After fluid bed is sent into crushing as fluidizing gas after consuming the burnt dirt of oxygen and part, coking coal carries out fluidizing, is dried, is classified.
3. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1 or 2, it is characterised in that the fine coal
Taken out of from fluid bed by fluidizing gas and Jing expansion chambers or cyclone dust extractor trapping are separated from fluidizing gas, send into blast furnace
Injection coal-hole or pressure ball system.
4. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 3, it is characterised in that match somebody with somebody from ball-Jiao
The dusty gas of hopper, ball-Jiao's separator, blast furnace blowing coal-hole or pressure ball system and ball-coal separator sends into ball-coal in the lump
Qualified discharge after cleaner unit dedusting is sent into after dampness is taken away in rotary kiln.
5. the dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1 or 4, it is characterised in that go out expansion chamber
Or the fluidizing gas part circulation of cyclone dust extractor is transmitted back to the detonation burner that disappears, remainder is sent in ball-coal rotary kiln and is taken away
Qualified discharge after cleaner unit dedusting is sent into after dampness.
6. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1, it is characterised in that control is by coke dry quenching furnace
The cold burnt temperature discharged, to adjust out the heat-storing sphere temperature of ball-Jiao's heat exchanger, and then controls out ball-coal rotary kiln coking coal
Water content.
7. the dry quenching system residual heat and energy method of comprehensive utilization as described in claim 1 and 6, it is characterised in that control out dry
The cold burnt temperature of stove is put out more than 200 DEG C, more than 250 DEG C, to improve out the heat-storing sphere temperature of ball heat exchanger as 180-230 DEG C, enter
And the coking coal water content of ball-coal rotary kiln is controlled out in below 5wt%.
8. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 2, it is characterised in that fluid bed described in Jing
In dried coking coal, water content drops to below 3wt%.
9. dry quenching system residual heat and energy method of comprehensive utilization as claimed in claim 1, it is characterised 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, it is characterised in that the ball-
Burnt separator is electromagnetic separator.
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| CN201610957404.9A CN106566568B (en) | 2016-10-27 | 2016-10-27 | A kind of dry quenching system residual heat and energy method of comprehensive utilization |
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| CN201610957404.9A CN106566568B (en) | 2016-10-27 | 2016-10-27 | A kind of dry quenching system residual heat and energy method of comprehensive utilization |
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| CN106566568A true CN106566568A (en) | 2017-04-19 |
| CN106566568B CN106566568B (en) | 2019-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| 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 |
| JP2014040570A (en) * | 2012-07-23 | 2014-03-06 | Nippon Steel & Sumikin Engineering Co Ltd | Method of manufacturing coke for gasification melting furnace, and method of using the same |
-
2016
- 2016-10-27 CN CN201610957404.9A patent/CN106566568B/en active Active
Patent Citations (3)
| 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 |
| JP2014040570A (en) * | 2012-07-23 | 2014-03-06 | Nippon Steel & Sumikin Engineering Co Ltd | Method of manufacturing coke for gasification melting furnace, and method of using the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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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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