CN102125802B - Method for recovering and purifying waste gas during crude benzene hydrogenation refining production - Google Patents
Method for recovering and purifying waste gas during crude benzene hydrogenation refining production Download PDFInfo
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- CN102125802B CN102125802B CN2011100269067A CN201110026906A CN102125802B CN 102125802 B CN102125802 B CN 102125802B CN 2011100269067 A CN2011100269067 A CN 2011100269067A CN 201110026906 A CN201110026906 A CN 201110026906A CN 102125802 B CN102125802 B CN 102125802B
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Abstract
The invention provides a method for recovering and purifying waste gas during crude benzene hydrogenation refining production, which is characterized by comprising the following steps: sending desorbed gas during the crude benzene hydrogenation refining production into a desorbed gas buffer, and then mixing with coke oven gas with the amount of 300-600m<3./hour; sending dispersing gas in the crude benzene hydrogenation refining production to a dispersing and collecting tank, controlling the temperature of the dispersing gas at 35 DEG C, collecting and recovering condensed benzene substances, and then mixing with the coke oven gas with the amount of 70-100<3>/hour; sending hydrogen sulfide in the crude benzene hydrogenation refining production into the buffer, collecting and recovering liquid drops in the hydrogen sulfide, then mixing with the coke oven gas with the amount of 10-30m<3>/hour, performing purification treatment together, and never burning the waste gas during the crude benzene hydrogenation refining production any more, thereby not only realizing comprehensive recycling of resources, reducing the environmental pollution caused by burning of the waste gas, and improving the environment of a factory, but also recovering ammonia, sulfur, benzene substances and other precious chemical raw materials in the waste gas, and being a favorable way for enabling an enterprise to realize clean production, energy conservation, consumption reduction, pollution reduction and synergy.
Description
Technical field
The present invention relates to a kind of waste gas recovery, purification method, especially to waste gas such as the resolution gas in the refining production of the crude benzole hydrogenation of Coal Chemical Industry industry, dispersing gas, hydrogen sulfide, the method that is reclaimed, purifies, utilizes belongs to the industrial waste gas processing technology field.
Background technology
In the crude benzole hydrogenation process for refining process of coking production, can produce the waste gas such as a large amount of resolution gas and dispersing gas, contain methane (CH in these waste gas
4), hydrogen (H
2), carbon monoxide (CO), carbon dioxide (CO
2), nitrogen (N
2), hydrogen sulfide (H
2S), benzene class (C
nH
m) material etc.The processing method of prior art is: these resolution gas and concentrated the delivering to of dispersing gas are diffused house steward, then cause from Production Regional the processing of burning of the flare system of certain safe distance is arranged by diffusing house steward, or burn again after processing through simple desulfurization.Owing to contain a large amount of useful components in these waste gas, such as take disposal ability as 50,000 ton/years crude benzole hydrogenation refining plant (containing the pressure swing adsorption hydrogen production unit take coke-stove gas as raw material) as example, the resolution gas that produces in the annual production process and the total amount of dispersing gas are 633.6 ten thousand m
3, about 500 m of resolution gas wherein
3/ h, about 300 m of dispersing gas
3/ h, the methane content in resolution gas and the dispersing gas account for 45%, hydrogen content accounts for 36%, and carbon monoxide content (CO) accounts for 5%, ammonia (NH
3) content accounts for 1%, the content of benzene class material accounts for 3%, carbon dioxide (CO
2), nitrogen (N
2) content accounts for 8%, the content of hydrogen sulfide about 2%.Therefore simply set off and have following deficiency: on the one hand, a large amount of nitrogen dioxide (NO that burning produces
2), sulfur dioxide (SO
2), can cause serious pollution to atmosphere, can make on the other hand the preferably fuel source such as useful component in the waste gas such as methane, hydrogen, carbon monoxide (CO), and the industrial chemicals of the preciousness such as ammonia, sulphur, benzene class material wastes.Therefore, must seek a kind ofly can reclaim comprehensively and process crude benzole hydrogenation is refining in producing resolution gas and the method for dispersing gas, make enterprise realize cleaner production and energy-saving and emission-reduction, increase economic efficiency, environmental benefit and social benefit.
Summary of the invention
The object of the present invention is to provide the waste gas such as a kind of resolution gas, dispersing gas, hydrogen sulfide in processing that crude benzole hydrogenation is refining and producing, to reclaim ammonia, sulphur, the benzene class material in the waste gas, purify simultaneously this waste gas, make it to become the method for available coal gas.
The present invention is to provide waste gas recovery, purification method in the refining production of a kind of like this crude benzole hydrogenation, it is characterized in that comprising the following steps:
A, with in the parsing pneumatic transmission resolution gas buffer that crude benzole hydrogenation is refining in producing, afterwards with 300～600m
3The amount of/h is mixed with coke-stove gas;
B, the dispersing gas that crude benzole hydrogenation is refining in producing is veered away in the loose feeder, control dispersing gas temperature to 35 ℃, and collect and reclaim the benzene class material that condensation is got off, afterwards with 70～100m
3The amount of/h is mixed with coke-stove gas;
C, with in the hydrogen sulfide sending buffer that crude benzole hydrogenation is refining in producing, collect the drop that reclaims in the hydrogen sulfide, afterwards with 10～30m
3The amount of/h is mixed with coke-stove gas;
The coke-stove gas of the dispersing gas of D, the resolution gas that will be mixed with steps A, step B, the hydrogen sulfide of step C carries out routinely successively: (1) cooling coke-stove gas to 25 ℃; (2) ammonia in the adding sulfuric acid absorption coal gas will react the ammonium sulfate of generation afterwards after conventional crystallization, filtration, drying, get ammonium sulfate product; (3) with conventional washing oil with the benzene class material absorbing in the coal gas after, through Distillation recovery benzene class material, obtain the crude benzol product; (4) mixed solution that forms with conventional sodium carbonate and PDS catalyst absorbs the hydrogen sulfide in the coal gas, makes it to generate sulphur cream, more after filtration, heating obtains sulfur product; (5) purified gas through above-mentioned (1)～(4) step process is town gas, for each user.
The resolution gas buffer of described steps A is conventional air accumulator, with buffering, storage resolution gas.
The dispersing gas feeder of described step B is conventional closed horizontal tank, be used for mixing, collecting dispersing gas, and initial gross separation goes out benzene class material wherein.
The hydrogen sulfide buffer of described step C is conventional closed horizontal tank, and with buffering, storage hydrogen sulfide waste gas, and initial gross separation goes out the drop of wherein carrying secretly.
The present invention has following advantages and effect: adopt such scheme, can reclaim respectively the resolution gas in the refining production of crude benzole hydrogenation, dispersing gas, the waste gas such as hydrogen sulfide, through preliminary treatment and reclaim benzene class material in the waste gas and other useful component after, incorporate into again and together carry out purified treatment in the coke-stove gas, reclaim ammonia, benzene, the working substances such as sulphur, coal gas after the purification can be used as coke oven heating fuel, also can be used as clean high heating value town gas and provide coal consumption of living gas to citizen, no longer set off the waste gas in the refining production of crude benzole hydrogenation, both realized the comprehensive reutilization of resource, reduce waste gas and seted off the pollution that brings to environment, improved the environment of plant, reclaimed again the ammonia in the waste gas, sulphur, the industrial chemicals that benzene class material etc. are valuable, the waste gas that purifies simultaneously and coke-stove gas are that enterprise realizes cleaner production together as available fuel, the favourable approach of energy-saving and cost-reducing and contamination-reducing synergistic.Simultaneously the present invention and existing gas cleaning system be continuously operation synchronously, not only technique is simple, small investment, production operation is convenient, and security of operation is stable, especially hydrogen sulfide is carried separately, incorporate into more afterwards in the coke-stove gas, with the dilution concentration of hydrogen sulfide, therefore, can not cause adverse effect to system, and can obtain preferably economic benefit, social benefit and environmental benefit.
Description of drawings
Fig. 1 is process chart of the present invention.
Among Fig. 1,1 is crude benzole hydrogenation refined raw production. art, and 2 is the closed horizontal tank, and 3 is air accumulator, and 4 is the closed horizontal tank, and 5 is coke oven, and 6 is cooling tower, and 7 is gas-blowing engine, and 8 is sulphur ammonium saturator, and 9 for washing the benzene tower, and 10 is desulfurizing tower.
The specific embodiment
Below in conjunction with embodiment the present invention is described further.
A, with in the refining conventional air accumulator 3 of parsing pneumatic transmission of producing in 1 of crude benzole hydrogenation, by air accumulator 3 bufferings, store resolution gas, afterwards with 300m
3The amount of/h is mixed with coal gas from coke oven 5;
B, produce diffusing in the conventional closed horizontal tank 2 of pneumatic transmission in 1 with crude benzole hydrogenation is refining, mix, collect dispersing gas by closed horizontal tank 2, and control dispersing gas temperature to 35 ℃, the benzene class material that gets off to collect condensation is afterwards with 70m
3The amount of/h is mixed with coal gas from coke oven 5;
C, the hydrogen sulfide waste gas that crude benzole hydrogenation is made with extra care in the production 1 send in the conventional closed horizontal tank 4, and by closed horizontal tank 4 bufferings, storage hydrogen sulfide refuse gas, and initial gross separation goes out after the drop of carrying secretly in the waste gas, with 10m
3The amount of/h is mixed with coal gas from coke oven 5;
The coke-stove gas of the dispersing gas of D, the resolution gas that will be mixed with steps A, step B, the hydrogen sulfide waste gas of step C send conventional cooling tower 6 through gas-blowing engine 7, makes coal gas be cooled to 25 ℃;
E, the coal gas of step D is sent in the conventional sulphur ammonium saturator 8, amount adds sulfuric acid solution routinely, makes ammonia and sulfuric acid reaction generation ammonium sulfate in the coal gas, gets ammonium sulfate product;
F, send routine to wash in the benzene tower 9 coal gas of step e, add routinely the absorbent washing oil, to absorb the benzene class material in the coal gas, obtaining the crude benzol product by Distillation recovery;
G, the coal gas of step F is sent in the desulfurizing tower 10, add routinely sodium carbonate liquor and PDS catalyst, make hydrogen sulfide and sodium carbonate reaction in the coal gas generate sulphur cream, after filtering, send sulphur explained hereafter sulfur product, the coal gas gas delivery storage tank of the cleaning that obtains simultaneously is sent to the coke oven heating after pressurization.
A, with in the refining conventional air accumulator 3 of parsing pneumatic transmission of producing in 1 of crude benzole hydrogenation, by air accumulator 3 bufferings, store resolution gas, afterwards with 600m
3The amount of/h is mixed with coal gas from coke oven 5;
B, produce diffusing in the conventional closed horizontal tank 2 of pneumatic transmission in 1 with crude benzole hydrogenation is refining, mix, collect dispersing gas by closed horizontal tank 2, and control dispersing gas temperature to 35 ℃, the benzene class material that gets off to collect condensation is afterwards with 100m
3The amount of/h is mixed with coal gas from coke oven 5;
C, the hydrogen sulfide waste gas that crude benzole hydrogenation is made with extra care in the production 1 send in the conventional closed horizontal tank 4, and by closed horizontal tank 4 bufferings, storage hydrogen sulfide refuse gas, and initial gross separation goes out after the drop of carrying secretly in the hydrogen sulfide waste gas, with 30m
3The amount of/h is mixed with coal gas from coke oven 5;
The coke-stove gas of the dispersing gas of D, the resolution gas that will be mixed with steps A, step B, the hydrogen sulfide waste gas of step C send conventional cooling tower 6 through gas-blowing engine 7, makes coal gas be cooled to 25 ℃;
E, the coal gas of step D is sent in the conventional sulphur ammonium saturator 8, amount adds sulfuric acid solution routinely, makes ammonia and sulfuric acid reaction generation ammonium sulfate in the coal gas, gets ammonium sulfate product;
F, send routine to wash in the benzene tower 9 coal gas of step e, add routinely the absorbent washing oil, to absorb the benzene class material in the coal gas, obtaining the crude benzol product by Distillation recovery;
G, the coal gas of step F is sent in the desulfurizing tower 10, add routinely sodium carbonate liquor and PDS catalyst, make the reactions such as hydrogen sulfide in the coal gas and sodium carbonate generate sulphur cream, after filtering, send sulphur explained hereafter sulfur product, the coal gas gas delivery storage tank of the cleaning that obtains simultaneously, after pressurization as town gas for the user.
Claims (1)
1. the waste gas that a crude benzole hydrogenation is refining in producing reclaims, purification method, it is characterized in that comprising the following steps:
A, with in the parsing pneumatic transmission resolution gas buffer that crude benzole hydrogenation is refining in producing, afterwards with 300～600m
3The amount of/h is mixed with coke-stove gas;
B, the dispersing gas that crude benzole hydrogenation is refining in producing is veered away in the loose feeder, control dispersing gas temperature to 35 ℃, and collect and reclaim the benzene class material that condensation is got off, afterwards with 70～100m
3The amount of/h is mixed with coke-stove gas;
C, the hydrogen sulfide that crude benzole hydrogenation is made with extra care in producing send in the hydrogen sulfide buffer, collect the drop that reclaims in the hydrogen sulfide, afterwards with 10～30m
3The amount of/h is mixed with coke-stove gas;
The coke-stove gas of the dispersing gas of D, the resolution gas that will be mixed with steps A, step B, the hydrogen sulfide of step C carries out routinely successively: (1) cooling coke-stove gas to 25 ℃; (2) ammonia in the adding sulfuric acid absorption coke-stove gas will react the ammonium sulfate of generation afterwards after conventional crystallization, filtration, drying, get ammonium sulfate product; (3) with conventional washing oil with the benzene class material absorbing in the coke-stove gas after, through Distillation recovery benzene class material, obtain the crude benzol product; (4) mixed solution that forms with conventional sodium carbonate and PDS catalyst absorbs the hydrogen sulfide in the coke-stove gas, makes it to generate sulphur cream, more after filtration, heating obtains sulfur product; (5) purified gas that obtains through above-mentioned (1)～(4) step process is town gas, for each user.
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| CN102125802B true CN102125802B (en) | 2013-03-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580344A (en) * | 2012-02-13 | 2012-07-18 | 云南昆钢煤焦化有限公司 | Stabilizer waste gas recycling device |
| CN106629624A (en) * | 2016-09-29 | 2017-05-10 | 马鞍山钢铁股份有限公司 | Manufacturing technique for preparing sulphur by adopting compound type Claus oven |
| CN106430115B (en) * | 2016-09-29 | 2019-07-02 | 马鞍山钢铁股份有限公司 | The production technology of sulfuric acid is prepared with relieving haperacidity combustion furnace |
| CN106348253A (en) * | 2016-09-29 | 2017-01-25 | 马鞍山钢铁股份有限公司 | Production process for preparing sulfur by using Claus furnace |
| CN107019994B (en) * | 2017-04-27 | 2019-05-24 | 唐山华熠实业股份有限公司 | The processing method and system of crude benzole hydrogenation sulfurous gas |
| CN109307276B (en) * | 2018-10-30 | 2024-01-30 | 中冶焦耐(大连)工程技术有限公司 | Coking tail gas incineration process taking coal gas as seal |
| CN109621621A (en) * | 2018-11-26 | 2019-04-16 | 中冶焦耐(大连)工程技术有限公司 | A kind of coking VOCs dispersing gas cleaning recovery and processing system and method |
| CN109355088A (en) * | 2018-12-04 | 2019-02-19 | 中冶焦耐(大连)工程技术有限公司 | A kind of technique and system using gas cleaning system recycling coking tail gas |
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| CN201227576Y (en) * | 2007-11-26 | 2009-04-29 | 山东固德化工有限公司 | Waste-gas reutilization device in deep-processing production of coal tar |
| CN101879398B (en) * | 2010-06-29 | 2012-06-27 | 南京钢铁股份有限公司 | Recovery process of coking crude benzene dispersing gas and device thereof |
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Application publication date: 20110720 Assignee: Kunming Coking Gas Co.,Ltd. Assignor: Yunnan Coal & Energy Co., Ltd. Contract record no.: 2014530000019 Denomination of invention: Method for recovering and purifying waste gas during crude benzene hydrogenation refining production Granted publication date: 20130327 License type: Exclusive License Record date: 20140409 |
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