CN203525537U - Delayed coking tail gas treatment device - Google Patents

Delayed coking tail gas treatment device Download PDF

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Publication number
CN203525537U
CN203525537U CN201320555900.3U CN201320555900U CN203525537U CN 203525537 U CN203525537 U CN 203525537U CN 201320555900 U CN201320555900 U CN 201320555900U CN 203525537 U CN203525537 U CN 203525537U
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CN
China
Prior art keywords
tail gas
coke
coke drum
exhaust collection
tower
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Expired - Lifetime
Application number
CN201320555900.3U
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Chinese (zh)
Inventor
李和杰
杜翔
王晨崖
徐江华
郭勇博
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Sinopec Engineering Group Co Ltd
Sinopec Guangzhou Engineering Co Ltd
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Sinopec Engineering Group Co Ltd
Sinopec Guangzhou Engineering Co Ltd
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Priority to CN201320555900.3U priority Critical patent/CN203525537U/en
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Abstract

The utility model discloses a delayed coking tail gas treatment device, comprising a coke pool tail gas collection hood (1), a tail gas washing facility (2), a tail gas rapid cooling nozzle (3), a coke tower tail gas collector (4), a tail gas deodorization tower (5), a coke tower (9), an enclosed coke pool (7) and a slide chute (8), wherein the coke pool tail gas collection hood (1) is arranged above the slide chute 8 to form the enclosed slide chute; two ends of the enclosed slide chute are communicated with the coke tower (9) and the sealed coke pool 7; the tail gas washing facility (2) is arranged inside the coke pool gas collection hood (1); the tail gas rapid cooling nozzle (3) is connected with the coke pool tail gas collection hood (1); one end of the coke tower tail gas collector (4) is communicated with the top of the coke tower (9); the other end of the coke tower tail gas collector (4) and the coke pool tail gas collection hood (1) are communicated with the tail gas deodorization tower (5). The delayed coking tail gas treatment device disclosed by the utility model, secondary pollution of moisture, a foul gas and coke powder can be basically removed, and the production and work environments of a coking device are improved.

Description

A kind of delayed coking exhaust gas processing device
Technical field
The utility model relates to the processing method of the burnt pond tail gas of a kind of delayed coking and coke drum tail gas, specifically, relate to burnt pond tail gas and coke drum tail gas (decoking operation is opened after top cover machine, by top of coke tower escaping gas) processing method and relevant device thereof.
Background technology
In PETROLEUM PROCESSING flow process, delay coking process is a kind of important residual oil process.Raw material is heated to, after approximately 500 ℃, enter coke drum and carry out heat scission reaction and condensation reaction through heat exchange and coking furnace, generates oil gas and solid coke in coke drum.The oil gas that heat scission reaction generates, enters fractionating column through top of coke tower In Oil-gas Line, is separated into the cuts such as rich gas and naphtha, diesel oil, wax oil.Solid coke is deposited in coke drum, and regularly decoking is to Jiao Chi.
Conventionally adopt water under high pressure hole and cut Jiao, the coke button that is cut, smashes enters Jiao Chi by chute together with water under high pressure.In burnt pond, after standing dehydration, coke is carrying device outward, and coke cutting water recycles after precipitation, filtration.Although through steaming out, feed water, steep the cooling steps such as burnt, during decoking, in coke drum, temperature is still higher before decoking, the vaporization of part water under high pressure, while causing decoking, top, burnt pond steam is full; Coke enrichment the sulfide in raw material, cause burnt pond periphery foul gas, be mainly that hydrogen sulfide fills the air; In the standing dehydration of coke, upper strata coke moisture scatters and disappears, and coke powder flies upward with the wind, spreads all over around Jiao Chi, forms dust pollution.In addition, decoking operation is opened after coke drum top cover, also has steam, foul gas to overflow from top of coke tower.Owing to there is the pollution of above-mentioned three aspects:, delayed coking unit is the worst place of whole refinery production environment often, is necessary to take measures to administer to pollute, improve working environment.
Chinese patent CN202924967U, adopts closed storage Jiao Chi to reduce coke powder and pollutes.Closed Jiao Chi comprises: basis, column, building enclosure and Jiao Chi top lightweight steel construction, Jiao Chi establishes at top daylighting and ventilation equipment.This patent can effectively suppress coke powder flies upward, but does not relate to the processing method that tail gas comprises water vapour, a small amount of oil gas and foul gas.If only extract tail gas out with ventilation equipment, do not solve steam and foul odour and pollute, and coke powder may, with tail gas extraction discharge, diffusion, cause secondary pollution.The problem that when in addition, this patent does not solve decoking, top of coke tower steam, foul gas are overflowed.
Utility model content
The coke powder that pollutes technical scheme existence for solving steam, the foul gas of existing Delayed Coking Technology existence causes the problem of secondary pollution with exhaust emissions, the utility model provides a kind of delayed coking exhaust gas processing device, can eliminate secondary pollution problem at all, improve delayed coker produces working environment.
A kind of delayed coking exhaust gas processing device of the utility model, comprise burnt pond exhaust collection cover 1, washing tail gas facility 2, tail gas quenching shower nozzle 3, coke drum exhaust collection device 4, tail gas deodorizing tower 5, coke drum 9, closed burnt pond 7 and chute 8, it is characterized in that: burnt pond exhaust collection cover 1 is positioned at chute 8 tops, coke drum 9 with closed burnt pond 7 by being communicated with, washing tail gas facility 2 is positioned at exhaust collection cover 1 inside, burnt pond, tail gas quenching shower nozzle 3 is connected with burnt pond exhaust collection cover 1, coke drum exhaust collection device 4 is communicated with coke drum 9 tops, coke drum exhaust collection device 4 and burnt pond exhaust collection cover 1 are communicated with tail gas deodorizing tower 5.
Described washing tail gas facility 2 is one group of shower nozzle matrix, is arranged on exhaust collection cover 1 inside, burnt pond, is arranged on chute 8 tops.
Described tail gas quenching shower nozzle 3 is connected with burnt pond exhaust collection cover 1, it is characterized in that: tail gas quenching shower nozzle 3 is positioned at the offgas duct being connected with burnt pond exhaust collection cover 1.
Described coke drum 9 tops be provided with flashboard type top cover machine 10, flashboard type top cover machine 10 one end are communicated with coke drum 9, the other end is communicated with coke drum exhaust collection device 4.
In described tail gas deodorizing tower 5, establish filler, the tail gas of closed burnt pond 7 and coke drum 9 enters tail gas deodorizing tower 5 bottoms, contacts with the absorbent that enters top of tower is reverse, and after purifying, tail gas is drawn by tail gas deodorizing tower 5 tops, emptying through air-introduced machine 6; Rich absorption liquid 13 enters tail gas deodorizing tower 5 column bottoms pumps by tail gas and extracts out, after regeneration, recycles.
Washing tail gas facility 2 is positioned at each burnt pond exhaust collection cover 1, is one group of shower nozzle matrix, and major function is that coke powder particle in tail gas is removed in washing, has the effect of cooled exhaust gas, minimizing vapour content simultaneously.During washing device can adopt, water or stripping are purified waste water etc. as washing medium.In addition, due to volatilization with send the reasons such as coke band water outside, Jiao Chi needs regular moisturizing, and washing medium enters Jiao Chi along chute after by washing nozzle, can serve as the moisturizing of burnt pond, and therefore washing device is set can not increase extra water content consumption.
Tail gas quenching shower nozzle 3 is positioned at the connected pipeline of burnt pond exhaust collection cover, and chilling shower nozzle can make it quenching medium atomization fully mix with tail gas, improves cooling effect.When tail gas amount is larger, washing device cannot reach the cooling effect of expection, and chilling shower nozzle can further reduce exhaust temperature, eliminates water vapour in tail gas.The selection principle of quenching medium is identical with washing medium.
Coke drum exhaust collection facility 4 is positioned at coke drum top cover machine top.Collection facility adopts three-port structure, and the bottom of threeway is connected with flashboard type top cover machine; Soft hermetically-sealed construction is established on top, prevents that coke drum tail gas from leaking, and during decoking, drilling rod can stretch into coke drum by threeway and hole, cuts Jiao; Side direction is top of coke tower exhaust gas channel, and decoking top cover in period machine is opened, and coke drum tail gas is drawn to tail gas deodorizing tower along side path.
The function of tail gas deodorizing tower 5 is the foul gas that absorb in tail gas.In deodorizing tower, establish filler or other mass transfer internals, burnt pond tail gas and coke drum tail gas are mixed into deodorizing tower bottom, contact with the absorbent that enters top of tower is reverse.After purifying, tail gas is drawn by tower top, emptying through air-introduced machine; Rich absorption liquid is extracted out by column bottoms pump, after regeneration, recycles.
The effect of air-introduced machine 6 is to produce draft to draw burnt pond tail gas and coke drum tail gas.Also can select the blower fan that outlet pressure is higher in addition, and be placed in before tail gas deodorizing tower, arrange that like this blower fan position is selected more flexible, but blower fan touch the tail gas without purification, cross flow medium variation.
Compared with prior art, a kind of delayed coking exhaust gas processing device of the utility model mainly has following advantages:
1) a kind of delayed coking exhaust gas processing device of the utility model, steam, stench and dust three classes that can fundamentally solve in decoking process are polluted the secondary coke powder pollution causing, and improve the production work environment of delayed coking unit.
2) the utility model, being provided with special exhaust collection facility above the chute of burnt pond He above coke drum top cover machine, can effectively be collected tail gas, prevents that tail gas from leaking.
3) the utility model is provided with washing nozzle matrix in the exhaust collection cover of burnt pond, can wash and remove coke powder particle in tail gas, prevents that coke powder from polluting.
4) the utility model is provided with tail gas quenching facility, can reduce exhaust temperature, eliminates water vapour dissipation in tail gas.
5) the utility model is provided with tail gas deodorizing tower, can remove foul gas in tail gas, improves working environment.
6) washing medium of the present utility model and quenching medium can select middle water or the stripping that price is lower to purify waste water, and washing and quenching medium can enter Jiao Chi and serve as the moisturizing of burnt pond, therefore implementing the utility model can not increase extra water content consumption, has water saving and energy-saving effect.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of delayed coking exhaust gas processing device structure chart.
Wherein:
1. burnt pond exhaust collection cover, 2. washing tail gas facility, 3. tail gas quenching shower nozzle, 4. coke drum exhaust collection device, 5. tail gas deodorizing tower, 6. air-introduced machine, 7. closed Jiao Chi, 8. chute, 9. coke drum, 10. flashboard type top cover machine, 11. cleaning of off-gas, 12. absorbents, 13. rich absorption liquids.
The specific embodiment
Below in conjunction with accompanying drawing, utilize a kind of delayed coking exhaust gas processing device of specific embodiment explanation the utility model, but do not limit scope of the present utility model.
Delayed coking unit adopts " two stove four towers " flow process, closed Jiao Chi length * wide * height is 75m * 32m * 10m, use a kind of delayed coking exhaust gas processing device of the utility model, comprise burnt pond exhaust collection cover 1, washing tail gas facility 2, tail gas quenching shower nozzle 3, coke drum exhaust collection device 4, tail gas deodorizing tower 5, coke drum 9, closed burnt pond 7 and chute 8, burnt pond exhaust collection cover 1 is positioned at chute 8 tops, coke drum 9 with closed burnt pond 7 by being communicated with, washing tail gas facility 2 is positioned at exhaust collection cover 1 inside, burnt pond, tail gas quenching shower nozzle 3 is connected with burnt pond exhaust collection cover 1, coke drum exhaust collection device 4 is communicated with coke drum 9 tops, coke drum exhaust collection device 4 and burnt pond exhaust collection cover 1 are communicated with tail gas deodorizing tower 5, washing tail gas facility 2 is one group of shower nozzle matrix, be arranged on exhaust collection cover 1 inside, burnt pond, be arranged on chute 8 tops, tail gas quenching shower nozzle 3 is connected with burnt pond exhaust collection cover 1, it is characterized in that: tail gas quenching shower nozzle 3 is positioned at the offgas duct being connected with burnt pond exhaust collection cover 1, coke drum 9 tops are provided with flashboard type top cover machine 10, flashboard type top cover machine 10 one end are communicated with coke drum 9, the other end is communicated with coke drum exhaust collection device 4, in tail gas deodorizing tower 5, establish filler, the tail gas of closed burnt pond 7 and coke drum 9 enters tail gas deodorizing tower 5 bottoms, contact with the absorbent that enters top of tower is reverse, after purifying, tail gas is drawn by tail gas deodorizing tower 5 tops, emptying through air-introduced machine 6, rich absorption liquid 13 enters tail gas deodorizing tower 5 column bottoms pumps by tail gas and extracts out, after regeneration, recycles.
1.6 meters of tail gas deodorizing tower 5 diameters, tangent line is high is 10 meters, in-built Pall ring or rectangular saddle ring dumped packing.Absorbent adopts 5% ammoniacal liquor, and ammoniacal liquor contacts with mixed tail gas is reverse, absorbs the foul gas in tail gas.Cleaning of off-gas is by deodorizing tower Base top contact, emptying by air-introduced machine.Air-introduced machine adopts frequency control to regulate, and according to burnt pool size and decoking selection of time air-introduced machine flow, is 1 * 10 4m 3/ h.Rich absorption liquid, through being pumped to sewage stripping device regeneration, recycles.

Claims (6)

1. a delayed coking exhaust gas processing device, comprise burnt pond exhaust collection cover (1), washing tail gas facility (2), tail gas quenching shower nozzle (3), coke drum exhaust collection device (4), tail gas deodorizing tower (5), coke drum (9), closed Jiao Chi (7) and chute (8), it is characterized in that: burnt pond exhaust collection cover 1 is positioned at chute 8 tops, two ends are communicated with coke drum 9 and closed burnt pond 7 respectively, washing tail gas facility (2) is positioned at burnt pond exhaust collection cover (1) inside, tail gas quenching shower nozzle (3) is connected with burnt pond exhaust collection cover (1), coke drum exhaust collection device (4) one end is communicated with coke drum (9) top, coke drum exhaust collection device (4) other end, burnt pond exhaust collection cover (1) is communicated with tail gas deodorizing tower (5).
2. according to a kind of delayed coking exhaust gas processing device described in strong request 1, it is characterized in that: described washing tail gas facility (2) is one group of shower nozzle matrix, be arranged on burnt pond exhaust collection cover (1) inside, be arranged on chute (8) top.
3. according to a kind of delayed coking exhaust gas processing device described in strong request 1, it is characterized in that: burnt pond exhaust collection cover 1 is positioned at chute 8 tops and forms closed chute.
4. according to a kind of delayed coking exhaust gas processing device described in strong request 1, it is characterized in that: described tail gas quenching shower nozzle (3) is connected with burnt pond exhaust collection cover (1), it is characterized in that: tail gas quenching shower nozzle (3) is positioned at the connected offgas duct of burnt pond exhaust collection cover (1).
5. according to a kind of delayed coking exhaust gas processing device described in strong request 1, it is characterized in that: described coke drum (9) top is provided with flashboard type top cover machine (10), flashboard type top cover machine (10) one end is communicated with coke drum (9), and the other end is communicated with coke drum exhaust collection device (4).
6. according to a kind of delayed coking exhaust gas processing device described in strong request 1, it is characterized in that: in described tail gas deodorizing tower (5), establish filler or other mass transfer internals, the tail gas of closed Jiao Chi (7) and coke drum (9) enters tail gas deodorizing tower (5) bottom, contact with the absorbent that enters top of tower is reverse, after purifying, tail gas is drawn by tail gas deodorizing tower (5) top, emptying through air-introduced machine (6), rich absorption liquid (13) is extracted out by tail gas deodorizing tower (5) column bottoms pump.
CN201320555900.3U 2013-09-02 2013-09-02 Delayed coking tail gas treatment device Expired - Lifetime CN203525537U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105883362A (en) * 2015-01-07 2016-08-24 中石化洛阳工程有限公司 Coke storage and conveying equipment with reversing device
CN106914068A (en) * 2015-12-24 2017-07-04 中石化洛阳工程有限公司 A kind of delayed coking exhaust gas treating method
CN111068491A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN111068440A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment device
CN111068493A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment process and device
CN111068492A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment process and device
CN111068494A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN113445793A (en) * 2020-03-25 2021-09-28 中国石油化工股份有限公司 Detachable closed enclosure structure
CN114149815A (en) * 2021-12-03 2022-03-08 中钢集团天澄环保科技股份有限公司 Delayed coking coke storage pool waste gas collecting and circulating treatment method
CN114904350A (en) * 2021-02-07 2022-08-16 中国石油化工股份有限公司 Demisting method and demisting equipment for closed decoking pool

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105883362A (en) * 2015-01-07 2016-08-24 中石化洛阳工程有限公司 Coke storage and conveying equipment with reversing device
CN105883362B (en) * 2015-01-07 2019-05-17 中石化洛阳工程有限公司 A kind of coke storage and conveying equipment with reversing arrangement
CN106914068A (en) * 2015-12-24 2017-07-04 中石化洛阳工程有限公司 A kind of delayed coking exhaust gas treating method
CN111068492A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment process and device
CN111068440A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment device
CN111068493A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment process and device
CN111068491A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN111068494A (en) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN111068440B (en) * 2018-10-18 2022-07-15 中国石油化工股份有限公司 Coking tail gas treatment device
CN111068491B (en) * 2018-10-18 2022-12-02 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN111068494B (en) * 2018-10-18 2022-12-02 中国石油化工股份有限公司 Coking tail gas treatment method and device
CN113445793A (en) * 2020-03-25 2021-09-28 中国石油化工股份有限公司 Detachable closed enclosure structure
CN114904350A (en) * 2021-02-07 2022-08-16 中国石油化工股份有限公司 Demisting method and demisting equipment for closed decoking pool
CN114149815A (en) * 2021-12-03 2022-03-08 中钢集团天澄环保科技股份有限公司 Delayed coking coke storage pool waste gas collecting and circulating treatment method

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