CN102337365A - Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace - Google Patents
Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace Download PDFInfo
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- CN102337365A CN102337365A CN2011102034761A CN201110203476A CN102337365A CN 102337365 A CN102337365 A CN 102337365A CN 2011102034761 A CN2011102034761 A CN 2011102034761A CN 201110203476 A CN201110203476 A CN 201110203476A CN 102337365 A CN102337365 A CN 102337365A
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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 relates to a process for recovering coal gas in the equalizing and relieving process of a furnace top of a blast furnace and belongs to the technical field of the iron and steel industry. Crude gas which is equalized and relieved from a blast furnace weighing charging bucket enters a cyclone dust collector to carry out primary dust removal through an equalizing and relieving pipeline and then enters a cloth bag dust collector connected in series behind the cyclone dust collector to form clean gas. The process is characterized in that an ejector is connected in series behind the cloth bag dust collector; and under the action of the ejector, the clean gas is rapidly ejected and enters a clean gas pipe network, so that the rapid relief and recovery of the equalized and relieved coal gas in the weighing charging bucket are realized. The process has the advantages that the process is simple, is convenient to operate and has low operation and maintenance cost; and besides the economic benefits caused by the recovery of the coal gas, the coal gas and dust discharge can also be reduced so as to generate good social benefits. Moreover, in the invention, a conventional process is changed less and the process is convenient to improve the existing conventional equalized and relieved coal gas system of the blast furnace.
Description
Technical field
The invention belongs to the Iron And Steel Industry technical field, relate to a kind of blast furnace furnace roof pressure-equalizing and discharging coal-gas recovering technology.
Background technology
Environmental requirement that steel industry is increasingly serious and Market Situation require iron and steel enterprise must accomplish energy-saving and emission-reduction, reduce cost.At present, blast furnace ironmaking operation discharge amount of pollution occupies the major part of whole steel industry quantity discharged, therefore, reduces ironmaking operation quantity discharged and seems particularly necessary.
Current; Pressure-equalizing and discharging during traditional charging of blast furnace is to utilize half purified gas, nitrogen all to be depressed into the consistent discharge in blast furnace of realizing with blast furnace top pressure to batch can; When diffusing; Raw gas in the batch can directly enters in the atmosphere after the thick dedusting of tornado dust collector, so that batch can diffuses to normal pressure, satisfies the batch can material feeding.Though the part dust that reclaims through tornado dust collector can be blown in the pressurising process in the weighing batch can once more, still can enter amounts of dust every year and get in the atmosphere.What is more important, a large amount of poisonous coal gas has also entered in the air, has not only polluted environment, and is a kind of huge economic waste.By the ton iron amount of diffusing 7～9Nm
3Calculate, at present, China's year coal gas diffusion amount reaches about 50 billion cubic meters, and (the blast furnace gas unit price is by 0.11 yuan/Nm up to 5.5 hundred million yuans for financial loss
3Calculate).
Present known new pressure-equalizing and discharging coal-gas recovering technology, or cost recovery is too high, or can not in industry, realize good coal-gas recovering, the two is taken into account can't to realize economic benefit and environmental benefit simultaneously.Application number is 201010209016.5; Name is called " shaft furnace charging pressure-equalizing and discharging coal-gas recovering process and device thereof " and discloses a kind of technology that emission coal gas is recovered into the purified gas pipe network; Though running cost is cheap, simple to operate, mainly rely on top pressure to do power purified gas is sent into gaspipe network; In actual the use, what be difficult to realize pressure-equalizing and discharging coal gas diffuses the efficient recovery with purified gas fully.
Summary of the invention
The technical problem that the present invention will solve is the deficiency to current traditional technology and various new improvement technologies; Provide a kind of easy to operate; The blast furnace furnace roof pressure-equalizing and discharging process coal-gas recovering technology that operation and maintenance cost is cheap; Coal gas and dust that efficient recovery produces reach the energy-saving and emission-reduction and the environmental protection purpose of blast furnace furnace roof pressure-equalizing and discharging system.
The technical solution adopted for the present invention to solve the technical problems is:
Blast furnace furnace roof pressure-equalizing and discharging process coal-gas recovering technology, from the raw gas of blast furnace weighing batch can pressure-equalizing and discharging after the pressure-equalizing and discharging pipeline gets into the tornado dust collector rough dusting, get into tornado dust collector after placed in-line sack cleaner form purified gas; It is characterized in that: the injector of connecting behind the sack cleaner, purified gas are got in the purified gas pipe network by quick injection under the effect of injector, realize diffusing fast and reclaiming of weighing batch can pressure-equalizing and discharging coal gas.
By technique scheme, the coal gas that will diffuse out in the time of coal gas diffusion is introduced in the purified gas pipe network.
By technique scheme; Described injector entrance comprises two inlets; Be respectively instrumentation tubes and injecting tube; Instrumentation tubes is connected with furnace roof clean coal tracheae to feed through the dust separating blast furnace furnace roof of top gas sack cleaner system purification purified gas through pipeline and high top pressure gas stop valve, and injecting tube is connected with sack cleaner with the purified gas behind the access bag-type dust through pipeline and injector trip valve.
By technique scheme; Because the weighing batch can emission coal gas pressure behind the bag-type dust is lower than the highly compressed blast furnace furnace roof purified gas pressure through purifying and dedusting; Weighing batch can emission coal gas behind bag-type dust gets into the injector from injecting tube; Sprayed into the highly compressed blast furnace furnace roof purified gas injection the injector from instrumentation tubes, and got into fast in the purified gas pipe network through injector through purifying and dedusting.
By technique scheme, described sack cleaner is parallelly connected with top gas sack cleaner system.
By technique scheme, the sack cleaner import is provided with the cloth bag trip valve, and sack cleaner is connected with tornado dust collector with pipeline through the cloth bag trip valve; Three outlets of sack cleaner are provided with purified gas respectively and diffuse valve, soot cleaning valve, injector trip valve; Purified gas diffuses valve and is used under sack cleaner maintenance or replacing cloth bag situation, diffusing the purified gas in the sack cleaner; Soot cleaning valve is used to clear up sack cleaner and captures the dust that gets off.
Tornado dust collector outlets is provided with cyclone dust removal and diffuses valve, and cyclone dust removal is diffused valve and is used for breaking down or changing under the situation such as cloth bag and maintenance at sack cleaner, directly opens cyclone dust removal and diffuses valve, diffuses the pressure-equalizing and discharging coal gas in the weighing batch can.
By technique scheme, half purified gas equalizer valve and nitrogen equalizer valve are set also on the tornado dust collector inlet line; Be used for the weighing batch can is all pressed.
By technique scheme, described blast furnace furnace roof purified gas does not pass through TRT top pressure power generation unit or reducing valve group, still is in high pressure conditions.
By technique scheme, the pressure-equalizing and discharging of above-mentioned technology reclaims detailed process and is:
When all pressing, open pressure-equalizing and discharging valve and half purified gas equalizer valve, half purified gas is once all pressed the weighing batch can through the pressure-equalizing and discharging pipeline; Can not meet the demands if once all press, open the nitrogen equalizer valve again, with high pressure nitrogen the weighing batch can carried out secondary and all press, reach suitable pressure requirement; All press to finish, open the blanking lock, furnace charge gets into the blast furnace through the blanking lock from the weighing batch can;
When diffusing, open pressure-equalizing and discharging trip valve and cloth bag trip valve, the raw gas that diffuses from the weighing batch can gets into tornado dust collector through the pressure-equalizing and discharging pipeline, and half purified gas after the tornado dust collector dedusting gets in the sack cleaner, and is formed purified gas by smart dedusting; And when diffusing; Open injector trip valve, high top pressure gas stop valve and trip valve; Under the injector effect, the quick injection of the highly compressed blast furnace furnace roof purified gas through purifying and dedusting that the pressure-equalizing and discharging coal gas after the sack cleaner dedusting is sprayed into from instrumentation tubes the injector gets into the purified gas pipe network;
When pressure-equalizing and discharging coal gas diffusion to the normal pressure in the weighing batch can, close the pressure-equalizing and discharging trip valve, realize the purpose of the coal gas diffusion recovery of weighing batch can.
The injector volume can and diffuse speed selection according to weighing batch can coal gas diffusion amount.In order to realize the diffusing of pressure-equalizing and discharging coal gas in the weighing batch can faster; After coal gas diffusion finishes, close the cloth bag trip valve, keep injector trip valve, high top pressure gas stop valve and trip valve to open for some time simultaneously; Make injector continue the coal gas in the injection sack cleaner; And make in the sack cleaner negative pressure that forms to a certain degree, when being beneficial to next weighing batch can pressure-equalizing and discharging coal gas diffusion, can carry out with the speed of diffusing faster.Adopt this mode, keeping under the constant situation of weighing batch can coal gas diffusion speed, can select less volumetrical injector to reduce the fixed investment cost.
Blast furnace furnace roof pressure-equalizing and discharging process gas recovering device comprises blast furnace weighing batch can, placed in-line sack cleaner behind the pressure-equalizing and discharging pipeline, multiple valve, tornado dust collector and the tornado dust collector that connect of batch can therewith; It is characterized in that the injector of behind sack cleaner, connecting; From the raw gas of weighing batch can pressure-equalizing and discharging after the tornado dust collector dedusting; Form purified gas after getting into the smart dedusting of sack cleaner; This purified gas is got in the purified gas pipe network by quick injection under the effect of injector, realizes diffusing fast and reclaiming of weighing batch can pressure-equalizing and discharging coal gas.
By technique scheme; Described injector entrance comprises two inlets; Be respectively instrumentation tubes and injecting tube; Instrumentation tubes is connected with furnace roof clean coal tracheae to feed through the dust separating blast furnace furnace roof of top gas sack cleaner system purification purified gas through pipeline and high top pressure gas stop valve, and injecting tube is connected with sack cleaner with the purified gas behind the access bag-type dust through pipeline and injector trip valve.
By technique scheme; Because the weighing batch can emission coal gas pressure behind the bag-type dust is lower than the highly compressed blast furnace furnace roof purified gas pressure through purifying and dedusting; Weighing batch can emission coal gas behind bag-type dust gets into the injector from injecting tube; Sprayed into the highly compressed blast furnace furnace roof purified gas injection the injector from instrumentation tubes, and got into fast in the purified gas pipe network through injector through purifying and dedusting.
Described sack cleaner is parallelly connected with top gas sack cleaner system.
The sack cleaner import is provided with the cloth bag trip valve, and sack cleaner is connected with tornado dust collector with pipeline through the cloth bag trip valve; Three outlets of sack cleaner are provided with purified gas respectively and diffuse valve, soot cleaning valve, injector trip valve; Purified gas diffuses valve and is used under sack cleaner maintenance or replacing cloth bag situation, diffusing the purified gas in the sack cleaner; Soot cleaning valve is used to clear up sack cleaner and captures the dust that gets off.
Tornado dust collector outlets is provided with cyclone dust removal and diffuses valve, and cyclone dust removal is diffused valve and is used for breaking down or changing under the situation such as cloth bag and maintenance at sack cleaner, directly opens cyclone dust removal and diffuses valve, diffuses the pressure-equalizing and discharging coal gas in the weighing batch can.
Half purified gas equalizer valve and nitrogen equalizer valve also are set on the tornado dust collector inlet line; Be used for the weighing batch can is all pressed.
Described blast furnace furnace roof purified gas does not pass through TRT top pressure power generation unit or reducing valve group, still is in high pressure conditions.
The injector volume can and diffuse speed selection according to weighing batch can coal gas diffusion amount.
The invention has the beneficial effects as follows: solved raw gas in the traditional technology to empty emission problem; Raw gas is purified the back reclaim entering purified gas pipe network; When having solved problem of environmental pollution, also can the coal-gas recovering utilization be had great economic benefit and social benefit.In addition, fixed investment of the present invention and operation expense are cheap, and schedule of operation and original technology basically identical are easy to learn, safe and reliable.
Description of drawings
Fig. 1 is a blast furnace furnace roof pressure-equalizing and discharging process coal-gas recovering process flow diagram of the present invention;
Wherein: 1---blast-furnace body; 2---the blanking lock; 3---the weighing batch can; 4---the pressure-equalizing and discharging pipeline; 5---the pressure-equalizing and discharging trip valve; 6---tornado dust collector; 7---valve is diffused in cyclone dust removal; 8---half purified gas equalizer valve; 9---the nitrogen equalizer valve; 10---the cloth bag trip valve; 11---purified gas diffuses valve; 12---soot cleaning valve; 13---sack cleaner; 14---the injector trip valve; 15---the high top pressure gas stop valve; 16---injector; 17---trip valve; 18---the purified gas pipe network.
Embodiment
For understanding the present invention better, the present invention is done further description below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1; Blast furnace furnace roof pressure-equalizing and discharging process coal-gas recovering technology; Blast-furnace body 1 is connected with weighing batch can 3 through baiting valve 2;, after pressure-equalizing and discharging pipeline 4 gets into tornado dust collector 6 rough dustings, get into the placed in-line sack cleaners 13 in tornado dust collector 6 backs and carry out smart dedusting and form purified gas from the raw gas of weighing batch can 3 pressure-equalizing and dischargings.This bag-type dust apparatus 13 is parallelly connected with top gas sack cleaner system.
The back of sack cleaner 13 has connected an injector 16, makes purified gas after sack cleaner 13 smart dedustings under the effect of injector 16, gets into purified gas pipe network 18 fast, realizes diffusing and recycling of weighing batch can coal gas.All pressures of weighing batch can 3 are then consistent with traditional technology.What for dissimilar blast furnaces, only need weighing batch can 3 emission coal gas to select the sack cleaner 13 of appropriate volume to get final product according to injector 16.
Described injector 16 entrances are made up of instrumentation tubes and injecting tube two portions; Instrumentation tubes is connected with furnace roof clean coal tracheae to feed through the dust separating blast furnace furnace roof of top gas sack cleaner system purification purified gas through pipeline and high top pressure gas stop valve 15; Injecting tube is connected with sack cleaner 13 with the purified gas behind the access bag-type dust through pipeline and injector trip valve 14.The injector outlet section then is connected with purified gas pipe network 18 with trip valve 17 through pipeline.
Because the weighing batch can emission coal gas pressure behind the bag-type dust is lower than the highly compressed blast furnace furnace roof purified gas pressure through purifying and dedusting; Weighing batch can emission coal gas behind bag-type dust gets into the injector 16 from injecting tube, is sprayed into the highly compressed blast furnace furnace roof purified gas injection through purifying and dedusting the injector 16 from instrumentation tubes, and gets in the purified gas pipe network 18 fast through injector 16.
Described blast furnace furnace roof purified gas does not pass through TRT top pressure power generation unit or reducing valve group, still is in high pressure conditions.
As shown in Figure 1, when all pressing, open pressure-equalizing and discharging valve 5 and half purified gas equalizer valve, 8, half purified gas are once all pressed through 4 pairs of weighing batch cans 3 of pressure-equalizing and discharging pipeline.Can not meet the demands if once all press, open nitrogen equalizer valve 9 again, with high pressure nitrogen weighing batch can 3 carried out secondary and all press, reach suitable pressure requirement.All press to finish, open blanking lock 2, furnace charge gets into the blast furnace 1 through blanking lock 2 from weighing batch can 3.
When diffusing, open pressure-equalizing and discharging trip valve 5 and cloth bag trip valve 10, the raw gas that diffuses from weighing batch can 3 gets into tornado dust collector 6 through pressure-equalizing and discharging pipeline 4.Half purified gas after tornado dust collector 6 dedustings gets in the sack cleaner 13, and is formed purified gas by smart dedusting.
When diffusing; Open injector trip valve 14, high top pressure gas stop valve 15 and trip valve 17; Under injector 16 effects, the highly compressed blast furnace furnace roof purified gas injection through purifying and dedusting that the pressure-equalizing and discharging coal gas after sack cleaner 6 dedustings is sprayed into from instrumentation tubes the injector gets into purified gas pipe network 18.When pressure-equalizing and discharging coal gas diffusion to the normal pressure in the weighing batch can 3, close pressure-equalizing and discharging trip valve 5, realize the purpose of the coal gas diffusion recovery of weighing batch can 3.
Cyclone dust removal is diffused valve 7 and is used for breaking down or changing under the situation such as cloth bag and maintenance at sack cleaner 13, directly opens cyclone dust removal and diffuses valve 7, diffuses the pressure-equalizing and discharging coal gas in the weighing batch can 3.
Purified gas diffuses valve 11 and is used under sack cleaner 13 maintenances or replacing cloth bag situation, diffusing the purified gas in the sack cleaner 13.
The injector volume can and diffuse speed selection according to weighing batch can coal gas diffusion amount.In order to realize the diffusing of pressure-equalizing and discharging coal gas in the weighing batch can 3 faster; Can after coal gas diffusion finishes, close cloth bag trip valve 10, keep injector trip valve 14, high top pressure gas stop valve 15 and trip valve 17 to open for some time simultaneously; The coal gas that injector 16 is continued in the injection sack cleaner 13; And make in the sack cleaner 13 negative pressure that forms to a certain degree, when being beneficial to next weighing batch can 3 pressure-equalizing and discharging coal gas diffusions, can carry out with the speed of diffusing faster.So, also can select less injector, reduce the fixed investment cost keeping under the constant situation of weighing batch can 3 coal gas diffusion speed.
Above disclosedly be merely preferred embodiment of the present invention, change, still belong to protection scope of the present invention according to the equivalence that the present invention did.
Claims (10)
1. blast furnace furnace roof pressure-equalizing and discharging process coal-gas recovering technology, from the raw gas of blast furnace weighing batch can pressure-equalizing and discharging after the pressure-equalizing and discharging pipeline gets into the tornado dust collector rough dusting, get into tornado dust collector after placed in-line sack cleaner form purified gas; It is characterized in that: the injector of connecting behind the sack cleaner, purified gas are got in the purified gas pipe network by quick injection under the effect of injector, realize diffusing fast and reclaiming of weighing batch can pressure-equalizing and discharging coal gas.
2. technology according to claim 1, the coal gas that will diffuse out when it is characterized in that diffusing is introduced in the purified gas pipe network.
3. technology according to claim 1 and 2; It is characterized in that described injector entrance comprises two inlets; Be respectively instrumentation tubes and injecting tube; Instrumentation tubes is connected with furnace roof clean coal tracheae to feed through the dust separating blast furnace furnace roof of top gas sack cleaner system purification purified gas through pipeline and high top pressure gas stop valve, and injecting tube is connected with sack cleaner with the purified gas behind the access bag-type dust through pipeline and injector trip valve.
4. technology according to claim 3; It is characterized in that the weighing batch can emission coal gas behind bag-type dust gets into the injector from injecting tube; Sprayed into the highly compressed blast furnace furnace roof purified gas injection the injector from instrumentation tubes, and got into fast in the purified gas pipe network through injector through purifying and dedusting.
5. according to claim 1 or 2 or 4 described technologies, it is characterized in that described sack cleaner is parallelly connected with top gas sack cleaner system.
6. technology according to claim 5 is characterized in that the sack cleaner import is provided with the cloth bag trip valve, and sack cleaner is connected with tornado dust collector with pipeline through the cloth bag trip valve; Three outlets of sack cleaner are provided with purified gas respectively and diffuse valve, soot cleaning valve, injector trip valve; Purified gas diffuses valve and is used under sack cleaner maintenance or replacing cloth bag situation, diffusing the purified gas in the sack cleaner; Soot cleaning valve is used to clear up sack cleaner and captures the dust that gets off; Tornado dust collector outlets is provided with cyclone dust removal and diffuses valve, and cyclone dust removal is diffused valve and is used for breaking down or changing under the situation such as cloth bag and maintenance at sack cleaner, directly opens cyclone dust removal and diffuses valve, diffuses the pressure-equalizing and discharging coal gas in the weighing batch can; Half purified gas equalizer valve and nitrogen equalizer valve also are set on the tornado dust collector inlet line; Be used for the weighing batch can is all pressed.
7. according to claim 1 or 2 or 4 or 6 described technologies, it is characterized in that described blast furnace furnace roof purified gas does not pass through TRT top pressure power generation unit or reducing valve group, still is in high pressure conditions.
8. technology according to claim 7 is characterized in that the pressure-equalizing and discharging recovery detailed process of above-mentioned technology is:
When all pressing, open pressure-equalizing and discharging valve and half purified gas equalizer valve, half purified gas is once all pressed the weighing batch can through the pressure-equalizing and discharging pipeline; Can not meet the demands if once all press, open the nitrogen equalizer valve again, with high pressure nitrogen the weighing batch can carried out secondary and all press, reach suitable pressure requirement; All press to finish, open the blanking lock, furnace charge gets into the blast furnace through the blanking lock from the weighing batch can;
When diffusing, open pressure-equalizing and discharging trip valve and cloth bag trip valve, the raw gas that diffuses from the weighing batch can gets into tornado dust collector through the pressure-equalizing and discharging pipeline, and half purified gas after the tornado dust collector dedusting gets in the sack cleaner, and is formed purified gas by smart dedusting; And when diffusing, open injector trip valve, high top pressure gas stop valve and trip valve; Under the injector effect, the quick injection of the highly compressed blast furnace furnace roof purified gas through purifying and dedusting that the pressure-equalizing and discharging coal gas after the sack cleaner dedusting is sprayed into from instrumentation tubes the injector gets into the purified gas pipe network;
When pressure-equalizing and discharging coal gas diffusion to the normal pressure in the weighing batch can, close the pressure-equalizing and discharging trip valve, realize the purpose of the coal gas diffusion recovery of weighing batch can.
9. according to claim 1 or 2 or 4 or 6 or 8 described technologies, it is characterized in that the injector volume can and diffuse speed selection according to weighing batch can coal gas diffusion amount.
10. technology according to claim 9; It is characterized in that in order to realize the diffusing of pressure-equalizing and discharging coal gas in the weighing batch can faster; After coal gas diffusion finishes, close the cloth bag trip valve, keep injector trip valve, high top pressure gas stop valve and trip valve to open for some time simultaneously; Make injector continue the coal gas in the injection sack cleaner; And make in the sack cleaner negative pressure that forms to a certain degree, when being beneficial to next weighing batch can pressure-equalizing and discharging coal gas diffusion, can carry out with the speed of diffusing faster; Adopt this mode, keeping under the constant situation of weighing batch can coal gas diffusion speed, can select less volumetrical injector to reduce the fixed investment cost.
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| CN2011102034761A CN102337365A (en) | 2011-07-20 | 2011-07-20 | Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace |
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| CN2011102034761A CN102337365A (en) | 2011-07-20 | 2011-07-20 | Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485723A (en) * | 2018-04-24 | 2018-09-04 | 东北大学 | A kind of inflammable and explosive inorganization emission coal gas recycling system and technique |
| CN110004258A (en) * | 2019-04-02 | 2019-07-12 | 北京首钢国际工程技术有限公司 | A kind of device recycling blast furnace top pressure-equalizing bleeding coal gas |
| CN110699505A (en) * | 2019-11-14 | 2020-01-17 | 光阳工程技术有限公司 | Blast furnace gas dry dedusting clean gas blowback ash removal system |
| CN111187867A (en) * | 2020-04-01 | 2020-05-22 | 北京中北欧瑞智工程技术有限公司 | Integrated recovery process for diffused raw coke oven gas |
| CN115323088A (en) * | 2022-08-22 | 2022-11-11 | 中冶华天工程技术有限公司 | Recovery process of large-emission coal gas of blast furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108485723A (en) * | 2018-04-24 | 2018-09-04 | 东北大学 | A kind of inflammable and explosive inorganization emission coal gas recycling system and technique |
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| CN110004258B (en) * | 2019-04-02 | 2024-02-09 | 北京首钢国际工程技术有限公司 | Device for recycling blast furnace top pressure equalizing and diffusing gas |
| CN110699505A (en) * | 2019-11-14 | 2020-01-17 | 光阳工程技术有限公司 | Blast furnace gas dry dedusting clean gas blowback ash removal system |
| CN111187867A (en) * | 2020-04-01 | 2020-05-22 | 北京中北欧瑞智工程技术有限公司 | Integrated recovery process for diffused raw coke oven gas |
| CN111187867B (en) * | 2020-04-01 | 2024-02-09 | 北京中北欧瑞智工程技术有限公司 | Integrated recovery process for diffused raw gas |
| CN115323088A (en) * | 2022-08-22 | 2022-11-11 | 中冶华天工程技术有限公司 | Recovery process of large-emission coal gas of blast furnace |
| CN115323088B (en) * | 2022-08-22 | 2023-09-29 | 中冶华天工程技术有限公司 | Process for recycling blast furnace large-emission gas |
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Application publication date: 20120201 |