CN114149815A - Delayed coking coke storage pool waste gas collecting and circulating treatment method - Google Patents
Delayed coking coke storage pool waste gas collecting and circulating treatment method Download PDFInfo
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- CN114149815A CN114149815A CN202111467080.8A CN202111467080A CN114149815A CN 114149815 A CN114149815 A CN 114149815A CN 202111467080 A CN202111467080 A CN 202111467080A CN 114149815 A CN114149815 A CN 114149815A
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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
- C10B45/00—Other details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- Oil, Petroleum & Natural Gas (AREA)
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a delayed coking coke storage tank waste gas collecting and circulating treatment method. Waste gas generated above a coke chute, above a coke tower top cover machine and at the top of a coke pool closed system is collected through a waste gas collecting pipe network, then the waste gas is intensively conveyed to an absorption tower through a fan, after water washing spraying, alkali washing spraying and demisting treatment are carried out in the absorption tower, then the waste gas passes through a gas-liquid separator, part of liquid drops and water vapor carried in the waste gas are separated from the waste gas, the separated gas phase is divided into two paths for treatment, one path is sent to a heating furnace or the inlet of a blower of a nearby heating furnace, a boiler and the like, enters the furnace for incineration treatment, and the other path is returned to the closed system through a pipeline for circulation; and the separated liquid phase reflows to the cold coke pool for recycling. The method can effectively solve the problem of inorganization emission of delayed coking waste gas, and has the characteristics of high safety, short construction period, low cost, stable operation, high automation degree, low maintenance cost and comprehensive design range, and the existing production process can not be influenced.
Description
Technical Field
The invention belongs to the technical field of inorganization emission control and treatment of atmospheric pollutants, and particularly relates to a collection and circulation treatment method of inorganization emission waste gas generated by a delayed coking coke storage tank in the petrochemical industry.
Background
The delayed coking process is a thermal cracking process for converting vacuum residue into lighter oil products and coke; during the production process, residual coke in the coke tower is discharged to a coke storage pool in a high-pressure hydraulic coke cutting mode; discharging cut coke and coke cutting water into a coke storage tank, and carrying out material grabbing and subsequent loading work by a top travelling crane.
Delayed coking is one of the main production processes of coking plants in the petrochemical industry in China, and at present, an open type cold coke treatment process is mostly adopted, and mixed gas containing sulfide, organic volatile matters, a small amount of dust and a large amount of water vapor is volatilized in the treatment process, so that the air pollution around a coke storage tank is serious, and certain pressure is caused on the surrounding environment.
At present, the domestic effective scheme is a closed decoking technology developed by medium petrochemistry, all open water tanks, material conveying equipment and the like are transformed into a closed equipment form, the method can solve the problem of inorganized emission of waste gas, but the method has the advantages of large transformation engineering amount, high investment cost, long transformation period and high system maintenance cost, and the particle size of the coke powder produced after the transformation is over fine, the product selling price is influenced to a certain extent, and the coke powder is not accepted by most domestic petrochemical plants.
Disclosure of Invention
Aiming at the defects in the prior art, the method for collecting and circularly treating the waste gas of the delayed coking coke storage tank is provided.
The technical solution of the invention is as follows: the method comprises the steps of wrapping a coke storage tank, a sewage settling tank, a coke grabbing traveling crane, an open trestle of the traveling crane and a charging hopper in a closed system, wherein the closed system is of a membrane structure, a color steel plate structure or a resin plate structure, waste gas collecting pipe networks are arranged at the top and the side part of the closed system, an exhaust hood is arranged above a coke chute, above a coke tower top cover machine and at the top of the closed system after the coke storage tank is closed, an electric or pneumatic air volume adjusting valve is arranged on a waste gas collecting pipeline at the coke chute, a booster fan and an electric valve are arranged on the waste gas collecting pipeline at the coke tower top cover machine, and a resistance balancer or an air volume adjusting valve is arranged in the waste gas collecting pipe network at the top of the coke storage tank closed system; waste gas generated above a coke chute, above a coke tower top cover machine and at the top of a coke pool closed system is collected through a waste gas collecting pipe network, then the waste gas is intensively conveyed to an absorption tower through a fan, after water washing spraying, alkali washing spraying and demisting treatment are carried out in the absorption tower, then the waste gas passes through a gas-liquid separator, part of liquid drops and water vapor carried in the waste gas are separated from the waste gas, the separated gas phase is divided into two paths for treatment, one path is sent to a heating furnace or the inlet of a blower of a nearby heating furnace, a boiler and the like, enters the furnace for incineration treatment, and the other path is returned to the closed system through a pipeline for circulation; and the separated liquid phase reflows to the cold coke pool for recycling.
According to the embodiment of the invention, the air inlet of the path of gas returning to the closed system for circulation is arranged on the side surface of the coke chute or right opposite to the coke chute, and enters the space of the closed system in a downward inclined mode.
According to the embodiment of the invention, the gas-liquid separator is a gas-liquid separation tank, a demister, a filler, a centrifugal separator and a dryer.
The beneficial technical effects of the invention are as follows: (1) the method adopts an air quantity accurate reasonable distribution technology, a plurality of air draft points are unevenly arranged at the top according to the difference of waste gas quantity generated in each stage of coke discharging, coke cooling, coke grabbing and the like in each area of the delayed coking coke storage pool, the air quantity of each point is accurately distributed by using a resistance balancer, and the waste gas in each area in the shed is pertinently collected, so that the reasonable distribution of the air quantity is realized; (2) the method comprises the steps of adopting a waste gas collecting and circulating treatment technology, firstly, conveying waste gas to an absorption tower in a centralized manner through a fan, carrying out washing spraying, alkali washing spraying and demisting treatment in the absorption tower, then separating partial liquid drops and water vapor carried in the waste gas from the waste gas through a gas-liquid separation device, treating the separated gas phase in two paths, and sending one path of gas with proper small air volume to an inlet of a blower of a heating furnace (or a nearby thermal furnace, a boiler and the like) to carry out furnace incineration treatment; the other path returns the residual air volume to the closed space through a pipeline for circulation, so that the replacement of the waste gas in the closed space is accelerated; the separated liquid phase flows back to the cold coke pool for recycling; (3) the waste gas collecting pipeline at the coke tower top cover machine farthest from the main exhaust fan of the waste gas collecting and circulating treatment system is provided with the small booster fan, and the waste gas at the coke tower top cover machine at the early stage of decoking can be effectively collected by switching the booster fan through the electric valve; (4) the gas returning to the closed space for circulation is characterized in that an air inlet of the closed space is formed in the side face of the coke chute or the right opposite face of the coke chute, the gas enters the closed space in a downward mode at a certain inclined angle, waste gas generated by the coke chute in the decoking process can be effectively treated, and the generated waste gas is guided to enter an air suction opening of the coke chute and an air suction opening positioned at the top of the closed space, so that the waste gas is prevented from being diffused in the closed space.
Drawings
FIG. 1 is a layout view of an exhaust collection cycle abatement system.
FIG. 2 is a flow chart of an exhaust collection cycle abatement method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
A delayed coking coke storage tank waste gas collecting and circulating treatment method comprises the steps that a coke storage tank, a sewage settling tank, a coke grabbing crane, an open trestle of the crane and a charging hopper are wrapped in a closed system, the closed system is of a membrane structure, a color steel plate structure or a resin plate structure, waste gas collecting pipe networks are arranged at the top and the side of the closed system, an exhaust hood is arranged above a coke chute, above a coke tower top cover machine and at the top of the closed system after the coke storage tank is closed, an electric or pneumatic air volume adjusting valve is arranged on a waste gas collecting pipeline at the coke chute, a booster fan and an electric valve are arranged on the waste gas collecting pipeline at the coke tower top cover machine, and a resistance balancer or an air volume adjusting valve is arranged in the waste gas collecting pipe network at the top of the coke storage tank closed system; waste gas generated above a coke chute, above a coke tower top cover machine and at the top of a coke pool closed system is collected through a waste gas collecting pipe network, then the waste gas is intensively conveyed to an absorption tower through a fan, after water washing spraying, alkali washing spraying and demisting treatment are carried out in the absorption tower, then the waste gas passes through a gas-liquid separator, part of liquid drops and water vapor carried in the waste gas are separated from the waste gas, the separated gas phase is divided into two paths for treatment, one path is sent to a heating furnace or the inlet of a blower of a nearby heating furnace, a boiler and the like, enters the furnace for incineration treatment, and the other path is returned to the closed system through a pipeline for circulation; and the separated liquid phase reflows to the cold coke pool for recycling.
The waste gas collecting pipeline of coke tower top cover machine department on set up small-size booster fan and electric valve, through electric valve's switching, realize the effective utilization of the amount of wind of taking out, ensure that the top cover machine exhaust ventilator department that is decoking is sufficient, other top cover machine suction opening that do not decoke play not have convulsions.
The resistance balancer is arranged on the waste gas collecting pipe network at the top of the coke pool closed system, the size of the resistance balancer on each pipeline is calculated by using an airflow simulation mode, the air suction quantity and the pressure in each branch pipeline are ensured to be the same as the design values when the coke pool closed system operates normally, and the workload of later-period maintenance personnel for overhauling the top of the coke pool is also reduced.
The waste gas purification system is provided with the gas-liquid separator behind the absorption tower, so that part of liquid drops and water vapor carried in waste gas are separated, and the influence on the energy consumption of a subsequent incinerator is reduced.
The waste gas purification system adopts a two-way mode, one way selects proper small air quantity to be sent to the inlet of a blower of a heating furnace (or a nearby heating furnace, a boiler and the like), and the air enters the furnace for incineration treatment, so that the energy consumption of the incinerator of the heating furnace and the like is reduced; the other path returns the residual air volume to the closed space through a pipeline for circulation, so that the replacement of waste gas in the closed space is accelerated, and the replacement of water vapor, toxic and harmful gases is accelerated.
The gas returning to the closed space for circulation is characterized in that an air inlet of the closed space is formed in the side face of the coke chute or the right opposite face of the coke chute, the gas enters the closed space in a downward mode at a certain inclined angle, waste gas generated by the coke chute in the decoking process can be effectively treated, and the generated waste gas is guided to enter an air suction opening of the coke chute and an air suction opening positioned at the top of the closed space, so that the waste gas is prevented from being diffused in the closed space.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A delayed coking coke storage tank waste gas collecting and circulating treatment method is characterized in that a coke storage tank, a sewage settling tank, a coke grabbing crane, an open trestle of the crane and a charging hopper are wrapped in a closed system, the closed system is of a membrane structure, a color steel plate structure or a resin plate structure, waste gas collecting pipe networks are arranged at the top and the side of the closed system, and the method is characterized in that an exhaust hood is arranged above a coke chute, above a coke tower top cover machine and at the top of the closed system after the coke tank is closed, an electric or pneumatic air volume adjusting valve is arranged on a waste gas collecting pipeline at the coke chute, a booster fan and an electric valve are arranged on the waste gas collecting pipeline at the coke tower top cover machine, and a resistance balancer or an air volume adjusting valve is arranged in the waste gas collecting pipe network at the top of the coke tank closed system; waste gas generated above a coke chute, above a coke tower top cover machine and at the top of a coke pool closed system is collected through a waste gas collecting pipe network, then the waste gas is intensively conveyed to an absorption tower through a fan, after water washing spraying, alkali washing spraying and demisting treatment are carried out in the absorption tower, then the waste gas passes through a gas-liquid separator, part of liquid drops and water vapor carried in the waste gas are separated from the waste gas, the separated gas phase is divided into two paths for treatment, one path is sent to a heating furnace or the inlet of a blower of a nearby heating furnace, a boiler and the like, enters the furnace for incineration treatment, and the other path is returned to the closed system through a pipeline for circulation; and the separated liquid phase reflows to the cold coke pool for recycling.
2. The delayed coking coke storage tank waste gas collecting, circulating and treating method as recited in claim 1, wherein the path of gas returning to the closed system for circulation is provided with an air inlet opening at the side of the coke chute or directly opposite to the coke chute, and enters the space of the closed system in a downward inclined manner.
3. The delayed coking coke storage tank waste gas collecting and circulating treatment method as claimed in claim 1, wherein the gas-liquid separator is a gas-liquid separation tank, a demister, a filler, a centrifugal separator, a dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467080.8A CN114149815A (en) | 2021-12-03 | 2021-12-03 | Delayed coking coke storage pool waste gas collecting and circulating treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111467080.8A CN114149815A (en) | 2021-12-03 | 2021-12-03 | Delayed coking coke storage pool waste gas collecting and circulating treatment method |
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| CN114149815A true CN114149815A (en) | 2022-03-08 |
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| CN202111467080.8A Pending CN114149815A (en) | 2021-12-03 | 2021-12-03 | Delayed coking coke storage pool waste gas collecting and circulating treatment method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203525537U (en) * | 2013-09-02 | 2014-04-09 | 中石化广州工程有限公司 | Delayed coking tail gas treatment device |
| CN104436979A (en) * | 2014-10-11 | 2015-03-25 | 福建省天朗环保设备有限公司 | VOCs waste gas treatment device |
| CN106861345A (en) * | 2017-04-17 | 2017-06-20 | 成都赋阳技术开发有限公司 | One kind is used for coal factory building gas cleaning plant |
| CN211497501U (en) * | 2019-12-30 | 2020-09-15 | 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 treating system |
| CN111808630A (en) * | 2020-08-17 | 2020-10-23 | 洛阳涧光特种装备股份有限公司 | Coke pool sealing and tail gas treatment system and method for delayed coking device |
| CN111804140A (en) * | 2020-08-05 | 2020-10-23 | 上海傲达环保科技有限公司 | Closed loading and waste gas treatment integrated system for environment-friendly formed coke pool |
-
2021
- 2021-12-03 CN CN202111467080.8A patent/CN114149815A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203525537U (en) * | 2013-09-02 | 2014-04-09 | 中石化广州工程有限公司 | Delayed coking tail gas treatment device |
| CN104436979A (en) * | 2014-10-11 | 2015-03-25 | 福建省天朗环保设备有限公司 | VOCs waste gas treatment device |
| CN106861345A (en) * | 2017-04-17 | 2017-06-20 | 成都赋阳技术开发有限公司 | One kind is used for coal factory building gas cleaning plant |
| CN211497501U (en) * | 2019-12-30 | 2020-09-15 | 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 treating system |
| CN111804140A (en) * | 2020-08-05 | 2020-10-23 | 上海傲达环保科技有限公司 | Closed loading and waste gas treatment integrated system for environment-friendly formed coke pool |
| CN111808630A (en) * | 2020-08-17 | 2020-10-23 | 洛阳涧光特种装备股份有限公司 | Coke pool sealing and tail gas treatment system and method for delayed coking device |
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