CN106669373B - Deodorization purification system for delayed coking device and deodorization purification method thereof - Google Patents

Deodorization purification system for delayed coking device and deodorization purification method thereof Download PDF

Info

Publication number
CN106669373B
CN106669373B CN201710150844.8A CN201710150844A CN106669373B CN 106669373 B CN106669373 B CN 106669373B CN 201710150844 A CN201710150844 A CN 201710150844A CN 106669373 B CN106669373 B CN 106669373B
Authority
CN
China
Prior art keywords
coke
tower
gas
deodorizing
separation tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710150844.8A
Other languages
Chinese (zh)
Other versions
CN106669373A (en
Inventor
张体木
陈宇
周斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Youhua System Integration Technology Co ltd
Original Assignee
Shanghai Youhua System Integration Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Youhua System Integration Technology Co ltd filed Critical Shanghai Youhua System Integration Technology Co ltd
Publication of CN106669373A publication Critical patent/CN106669373A/en
Application granted granted Critical
Publication of CN106669373B publication Critical patent/CN106669373B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00Cooling or quenching coke
    • C10B39/04Wet quenching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

本发明提供了一种用于延迟焦化装置的除臭净化系统,所述除臭净化系统设置于延迟焦化装置中每对焦炭塔塔顶,所述除臭净化系统包括抽真空器和分离罐,焦炭塔塔顶气体出口与抽真空器的气体入口相连,抽真空器的气体出口与分离罐的气体入口相连,冷焦水泵的出口与分离罐的液相入口相连,分离罐的顶部气体出口与大气相连,分离罐的底部物料出口与冷焦池相连。本发明通过在焦炭塔塔顶设置抽真空器以及分离罐,用冷焦水将焦炭塔顶来的废气及焦粉进行水洗,可以有效减少焦炭塔开盖后塔周围水汽弥漫、减少有害气体排放污染环境,有效减轻开盖时对操作人员安全及健康的影响。

Figure 201710150844

The present invention provides a deodorizing and purifying system for a delayed coking unit. The deodorizing and purifying system is arranged at the top of each coke tower in the delayed coking unit. The deodorizing and purifying system includes a vacuum pump and a separation tank. The gas outlet at the top of the coke tower is connected to the gas inlet of the vacuum pump, the gas outlet of the vacuum pump is connected to the gas inlet of the separation tank, the outlet of the cold coke water pump is connected to the liquid phase inlet of the separation tank, and the top gas outlet of the separation tank is connected to the The atmosphere is connected, and the bottom material outlet of the separation tank is connected with the cold coke pool. In the present invention, a vacuum pump and a separation tank are arranged on the top of the coke tower, and the exhaust gas and coke powder from the top of the coke tower are washed with cold coke water, which can effectively reduce the water vapor around the coke tower after the coke tower is opened, and reduce the emission of harmful gases Pollution to the environment, effectively reducing the impact on the safety and health of operators when opening the cover.

Figure 201710150844

Description

一种用于延迟焦化装置的除臭净化系统及其除臭净化方法Deodorization and purification system and deodorization and purification method for delayed coking unit

技术领域technical field

本发明属于焦炭处理领域,涉及一种除臭净化系统及其除臭净化方法,尤其涉及一种用于延迟焦化装置的除臭净化系统及其除臭净化方法。The invention belongs to the field of coke treatment, and relates to a deodorizing and purifying system and a deodorizing and purifying method thereof, in particular to a deodorizing and purifying system and a deodorizing and purifying method for a delayed coking device.

背景技术Background technique

在石油加工流程中,延迟焦化工艺是一种重要的渣油加工过程。原料经换热和焦化炉加热至约500℃后,进入焦炭塔进行热裂解反应与缩合反应,在焦炭塔内生成油气和固体焦炭。热裂解反应生成的油气,经焦炭塔顶油气线进入分馏塔,分离成富气和石脑油、柴油、蜡油等馏分。固体焦炭沉积在焦炭塔内,定期除焦至焦池。In the petroleum processing flow, the delayed coking process is an important residual oil processing process. After the raw material is heated to about 500°C by heat exchange and coking furnace, it enters the coke tower for thermal cracking reaction and condensation reaction, and generates oil gas and solid coke in the coke tower. The oil and gas generated by the pyrolysis reaction enters the fractionation tower through the oil and gas line at the top of the coke tower, and is separated into rich gas and fractions such as naphtha, diesel oil, and wax oil. Solid coke is deposited in the coke tower and is regularly decoked to the coke pool.

延迟焦化装置的焦炭塔通常是成对设置,当一座焦炭塔(老塔)内原料油反应生成设定高度的焦炭时,通过四通阀将原料油切换至与之对应的另一座焦炭塔(新塔)继续进行生产,老塔则进行冷焦、除焦和预热等操作,其中冷焦操作主要包括吹汽、给水和放水等步骤。吹汽就是自焦炭塔底向塔内通入蒸汽;给水就是自焦炭塔底向塔内通入冷水,使塔内焦炭冷却至适宜温度;放水就是待焦炭冷却至合适温度后停止向塔内通水,并将焦炭塔内积水自焦炭塔底排放干净。焦炭塔除焦通常是使用水力除焦,即使用高压水进行焦炭层的钻孔、切割和切碎,切碎后的焦炭自焦炭塔底排入焦炭池中。The coke towers of the delayed coking unit are usually arranged in pairs. When the raw oil in one coke tower (old tower) reacts to generate coke with a set height, the raw oil is switched to the corresponding other coke tower ( The new tower) continues production, while the old tower performs operations such as cold coking, decoking and preheating. The cold coke operation mainly includes steam blowing, water supply and water release. Blowing steam is to pass steam into the tower from the bottom of the coke tower; water supply is to pass cold water into the tower from the bottom of the coke tower to cool the coke in the tower to an appropriate temperature; water release means to stop the coke from flowing into the tower after it has cooled to an appropriate temperature. Water, and discharge the accumulated water in the coke tower from the bottom of the coke tower. Coking tower decoking usually uses hydraulic decoking, that is, high-pressure water is used to drill, cut and chop the coke layer, and the chopped coke is discharged from the bottom of the coke tower into the coke pool.

给水冷焦工艺按其原理分主要有两种:溢流冷焦工艺和浸泡冷焦工艺(简称泡焦),两种工艺都是自焦炭塔底注入冷水进行冷却焦炭。溢流冷焦是指在给水冷焦操作过程中持续向焦炭塔通水直至水从塔顶溢流,并使水持续溢流至焦炭冷却至所需要的温度。浸泡冷焦是指给水冷焦操作过程中当水淹没焦炭层到达焦炭塔内所设定的水位时,停止向焦炭塔底部通入水,然后通过水的蒸发来降低焦炭的温度。泡焦过程中,如焦炭塔内水位下降过快时,可向塔内补水,保证焦炭冷却效果。给水操作结束后,打开焦炭塔顶呼吸阀,将焦炭塔内积水排放干净,然后打开焦炭塔顶盖,使用高压水切除塔内焦炭。There are two main types of water-feeding cold coking processes according to their principles: overflow cold coking process and soaking cold coking process (abbreviated as soaking coke). Both processes inject cold water from the bottom of the coke tower to cool coke. Overflow cold coke means that water is continuously passed through the coke tower until the water overflows from the top of the tower during the operation of feed water cooling coke, and the water continues to overflow until the coke is cooled to the required temperature. Soaking cold coke means that when the water submerges the coke layer and reaches the set water level in the coke tower during the water-cooled coke operation, stop feeding water to the bottom of the coke tower, and then reduce the temperature of the coke through the evaporation of water. During the coke soaking process, if the water level in the coke tower drops too fast, water can be added to the tower to ensure the coke cooling effect. After the water supply operation, open the breathing valve at the top of the coke tower to drain the accumulated water in the coke tower, then open the top cover of the coke tower, and use high-pressure water to remove the coke in the tower.

现有典型的延迟焦化装置的工艺结构图如图1中所示,延迟焦化装置包括至少一对焦炭塔,每对焦炭塔之间都有设有阀门的管路相连接,以便于当一座焦炭塔(老塔)内原料油反应生成设定高度的焦炭时,可以切换至另一座焦炭塔(新塔)继续进行生产,每对焦炭塔塔顶产生的油气经油气线进入分馏塔,同时,每对焦炭塔塔顶还通过管路依次与放空塔、空冷器、水冷器和气液分离罐相连以排放焦炭塔中的残余气体。The process structure diagram of a typical existing delayed coking unit is shown in Figure 1. The delayed coking unit includes at least one coke tower, and each coke tower is connected by a pipeline with a valve so that it can be used as a coke When the raw material oil in the tower (old tower) reacts to form coke with a set height, it can be switched to another coke tower (new tower) to continue production. The oil and gas produced at the top of each coke tower enters the fractionation tower through the oil and gas line. The top of each coke tower is also connected to the vent tower, air cooler, water cooler and gas-liquid separation tank in sequence through pipelines to discharge the residual gas in the coke tower.

然后现有延迟焦化装置中存在如下问题:Then there are following problems in the existing delayed coker:

(1)在冷焦过程中泡焦操作的末期,焦炭塔内压力较低,焦炭塔内残存气体无法排放至放空塔,只能打开塔顶呼吸阀排放至大气。但焦炭塔打开塔顶呼吸阀后,由于背压降低,塔内的水再次汽化,并携带塔内烃类及含硫气体带出,造成塔周围水汽弥漫,同时污染环境,损害人体健康;(1) At the end of the coke soaking operation in the cold coking process, the pressure in the coke tower is low, and the residual gas in the coke tower cannot be discharged to the vent tower, and can only be discharged to the atmosphere by opening the breather valve at the top of the tower. However, after the coke tower opens the breathing valve at the top of the tower, due to the decrease of the back pressure, the water in the tower is vaporized again, and the hydrocarbons and sulfur-containing gases in the tower are carried out, causing water vapor to diffuse around the tower, polluting the environment and damaging human health;

(2)在冷焦过程中的泡焦操作过程中,焦炭不容易冷却透彻,特别是操作末期,塔内温度较低,水的汽化速率降低,导致冷焦时间长,影响装置处理能力;(2) During the coke soaking operation in the cold coking process, the coke is not easy to cool thoroughly, especially at the end of the operation, the temperature in the tower is low, and the vaporization rate of water decreases, resulting in a long cold coke time and affecting the processing capacity of the device;

(3)由于焦炭是多孔隙结构,焦炭塔放水后,焦炭孔隙仍中残留烃类及含硫气体,焦炭被切碎后溢出至大气中,造成周围空气恶臭,严重污染环境;(3) Since the coke has a porous structure, after the coke tower discharges water, hydrocarbons and sulfur-containing gases remain in the pores of the coke, and the coke is shredded and overflows into the atmosphere, causing foul odor in the surrounding air and seriously polluting the environment;

(4)焦炭塔内溢出的废气在分析中发现气体中不仅含有硫化物而且还有少量的苯类致癌物质,严重污染环境,极大的危害到操作人员的身体健康;(4) During the analysis of the exhaust gas overflowing from the coke tower, it was found that not only sulfide but also a small amount of benzene carcinogens were contained in the gas, which seriously polluted the environment and greatly endangered the health of operators;

(5)放水后打开焦炭塔顶盖前,塔内焦炭温度仍有80~90℃,塔内仍有一定压力,打开顶盖和底盖存在安全隐患。(5) Before the top cover of the coke tower is opened after the water is released, the temperature of the coke in the tower is still 80-90°C, and there is still a certain pressure in the tower. Opening the top and bottom covers has potential safety hazards.

对于上述问题,CN 202924967U公开了一种封闭式储焦池用于降低焦粉污染。封闭式焦池包括:基础、立柱、围护结构和焦池顶部轻钢结构,焦池顶部设采光和通风设施。所述方法可以有效抑制焦粉飞扬,但没有涉及尾气包括水蒸汽、少量油气和恶臭气体的处理方法。若仅用通风设施抽出尾气,则没有解决水汽和恶臭气味污染,而且焦粉可能随尾气抽出排放、扩散,造成二次污染。另外,所述方法也没有解决除焦时焦炭塔顶水汽、恶臭气体逸出的问题。For the above problems, CN 202924967U discloses a closed coke storage tank for reducing coke powder pollution. The closed coke pool includes: foundation, columns, enclosure structure and light steel structure on the top of the coke pool, and the top of the coke pool is equipped with lighting and ventilation facilities. The method can effectively suppress the flying of coke powder, but does not involve the treatment method of tail gas including water vapor, a small amount of oil gas and malodorous gas. If only ventilation facilities are used to extract the exhaust gas, the pollution of water vapor and foul smell will not be solved, and the coke powder may be exhausted and diffused with the exhaust gas, causing secondary pollution. In addition, the method does not solve the problem of water vapor and malodorous gas escaping from the top of the coke tower during decoking.

由此可见,延迟焦化装置往往是整个炼厂生产环境最恶劣的场所,如何采取措施治理污染、改善工作环境,同时提高装置的处理能力是亟需解决的问题。It can be seen that the delayed coking unit is often the place with the worst production environment in the entire refinery. How to take measures to control pollution, improve the working environment, and improve the processing capacity of the unit is an urgent problem to be solved.

发明内容Contents of the invention

针对现有延迟焦化装置中存在的气体污染和危害操作人员身体健康等安全隐患问题,以及冷焦时间长影响装置处理能力等问题,本发明提供了一种用于延迟焦化装置的除臭净化系统。本发明通过在焦炭塔塔顶设置除臭净化系统,可以有效减少焦炭塔开盖后塔周围水汽弥漫、减少有害气体排放污染环境,有效减轻开盖时对操作人员安全及健康的影响。The present invention provides a deodorization and purification system for delayed coking devices, aiming at the hidden safety problems such as gas pollution and endangering the health of operators in the existing delayed coking devices, and the problems that the long cold coking time affects the processing capacity of the devices. . The present invention arranges a deodorization and purification system on the top of the coke tower, which can effectively reduce the water vapor around the coke tower after the coke tower is opened, reduce harmful gas emission and pollute the environment, and effectively reduce the impact on the safety and health of operators when the cover is opened.

为达此目的,本发明采用以下技术方案:For reaching this purpose, the present invention adopts following technical scheme:

本发明提供了一种用于延迟焦化装置的除臭净化系统,所述延迟焦化装置包括至少一对焦炭塔,以及与焦炭塔塔顶依次连接的放空塔、空冷器、水冷器和气液分离罐,所述除臭净化系统设置于延迟焦化装置中每对焦炭塔塔顶,所述除臭净化系统包括抽真空器和分离罐,焦炭塔塔顶气体出口与抽真空器的气体入口相连,抽真空器的气体出口与分离罐的气体入口相连,分离罐的顶部气体直通大气,分离罐的底部物料出口与冷焦池相连。The invention provides a deodorization and purification system for a delayed coking unit, the delayed coking unit includes at least one coke tower, and a vent tower, an air cooler, a water cooler and a gas-liquid separation tank sequentially connected to the top of the coke tower , the deodorization and purification system is arranged at the top of each coke tower in the delayed coking unit, the deodorization and purification system includes a vacuum pump and a separation tank, the gas outlet of the coke tower top is connected with the gas inlet of the vacuum pump, and the exhaust The gas outlet of the vacuum is connected with the gas inlet of the separation tank, the gas at the top of the separation tank is directly connected to the atmosphere, and the material outlet at the bottom of the separation tank is connected with the cold coke pool.

其中,所述冷焦池为现有延迟焦化工艺中现有设备,并不属于本发明所述除臭净化系统。Wherein, the cold coke tank is an existing equipment in the existing delayed coking process, and does not belong to the deodorization and purification system of the present invention.

本发明中,所述延迟焦化装置为现有技术中已有装置,其包括至少一对焦炭塔,每对焦炭塔之间都有设有阀门的管路相连接,以便于当一座焦炭塔(老塔)内原料油反应生成设定高度的焦炭时,可以切换至另一座焦炭塔(新塔)继续进行生产,每对焦炭塔塔顶产生的油气经油气线进入分馏塔,同时,每对焦炭塔塔顶还通过管路依次与放空塔、空冷器、水冷器和气液分离罐相连以排放焦炭塔中的残余气体。In the present invention, the delayed coking device is an existing device in the prior art, which includes at least one coke tower, and every coke tower is connected with a pipeline with a valve so that it can be used as a coke tower ( When the raw material oil in the old tower reacts to generate coke with a set height, it can be switched to another coke tower (new tower) to continue production. The oil and gas produced at the top of each coke tower enters the fractionation tower through the oil and gas line. The top of the coke tower is also connected to the vent tower, air cooler, water cooler and gas-liquid separation tank in sequence through pipelines to discharge the residual gas in the coke tower.

以下作为本发明优选的技术方案,但不作为本发明提供的技术方案的限制,通过以下技术方案,可以更好的达到和实现本发明的技术目的和有益效果。The following are preferred technical solutions of the present invention, but not as limitations of the technical solutions provided by the present invention. Through the following technical solutions, the technical objectives and beneficial effects of the present invention can be better achieved and realized.

作为本发明优选的技术方案,所述除臭净化系统包括冷焦水泵,所述冷焦水泵与分离罐的液相入口相连。As a preferred technical solution of the present invention, the deodorization and purification system includes a cold coke water pump, and the cold coke water pump is connected to the liquid phase inlet of the separation tank.

作为本发明优选的技术方案,所述分离罐内设有喷淋装置,通过所述喷淋装置吸收溶解废气中的臭味气体及焦粉。As a preferred technical solution of the present invention, a spray device is provided in the separation tank, and the odor gas and coke powder in the dissolved waste gas are absorbed by the spray device.

作为本发明优选的技术方案,所述除臭净化系统通过抽真空器以抽真空的形式,将焦炭塔塔顶出来的废气吸入至分离罐内,通过冷焦水喷淋冷却,将气体中可凝结的废气及焦粉溶解在冷焦水中,不凝气排放至大气。As a preferred technical solution of the present invention, the deodorization and purification system sucks the waste gas from the top of the coke tower into the separation tank in the form of vacuum through a vacuum pump, and sprays and cools the waste gas that can be contained in the gas by cooling coke water. The condensed exhaust gas and coke powder are dissolved in the cold coke water, and the non-condensable gas is discharged to the atmosphere.

第二方面,本发明提供了上述除臭净化系统的除臭净化方法,所述方法为:在待冷焦和除焦的焦炭塔开盖前30min,待冷焦和除焦的焦炭塔开盖过程以及整个除焦过程中均保持除臭净化系统在开启状态,将从待冷焦和除焦的焦炭塔中抽出的气体进行水洗,水洗得到的不凝气体直接排放,水洗得到的液体进行后续处理。In a second aspect, the present invention provides the deodorization and purification method of the above-mentioned deodorization and purification system, the method is: 30 minutes before the coke tower to be cooled and decoked is opened, the coke tower to be cooled and decoked is opened During the process and the whole decoking process, the deodorization and purification system is kept in the open state, and the gas extracted from the coke tower to be cooled and decoked is washed with water, the non-condensable gas obtained by water washing is directly discharged, and the liquid obtained by water washing is used for subsequent deal with.

其中,所述后续处理为将水洗下来的液体排放至焦池与原焦池中的水一起进行处理。Wherein, the subsequent treatment is to discharge the washed liquid to the coke pool for treatment together with the water in the original coke pool.

本发明中,待冷焦和除焦的焦炭塔内的气体被抽空装置抽出,气体进入分离罐,在分离罐内与自罐顶来的冷焦水逆流接触冷凝冷却,不凝气从罐顶排放至大气,冷凝下来的液体从分离罐底部流出排放至焦池,与原焦池中的水一起进行处理。In the present invention, the gas in the coke tower to be cooled and decoked is extracted by the evacuation device, and the gas enters the separation tank, and in the separation tank, it contacts with the cold coke water from the top of the tank to condense and cool in countercurrent, and the non-condensable gas is discharged from the top of the tank. It is discharged to the atmosphere, and the condensed liquid flows out from the bottom of the separation tank and is discharged to the coke pool, where it is treated together with the water in the original coke pool.

在溢流冷焦工艺中,当待冷焦和除焦的焦炭塔塔顶温度<150℃,塔顶压力<0.1MPag时,将待冷焦和除焦的焦炭塔塔顶出口由送至放空塔改成送至溢流线,打开待冷焦和除焦的焦炭塔溢流管线上的溢流阀,关闭至放空塔管线上的放空阀,开始溢流冷却焦炭。In the overflow cold coking process, when the top temperature of the coke tower to be cooled and decoked is <150°C and the pressure on the top of the tower is <0.1MPag, the outlet of the coke tower to be cooled and decoked is sent to the vent The tower is changed to be sent to the overflow line, the overflow valve on the overflow line of the coke tower to be cooled and decoked is opened, the vent valve on the line to the vent tower is closed, and the overflow cooling coke is started.

作为本发明优选的技术方案,在待冷焦和除焦的焦炭塔的给水冷焦阶段,当待冷焦和除焦的焦炭塔中水位从焦炭塔塔顶溢流出,待冷焦和除焦的焦炭塔塔顶温度>150℃,塔顶压力>0.1MPa时,投用除臭净化系统。As a preferred technical solution of the present invention, in the feed water cooling stage of the coke tower to be cooled and decoked, when the water level in the coke tower to be cooled and decoked overflows from the top of the coke tower, the coke to be cooled and decoked When the temperature at the top of the coke tower > 150°C and the pressure at the top of the coke tower > 0.1MPa, the deodorization and purification system should be used.

在上述浸泡冷焦过程中启用待冷焦和除焦的焦炭塔顶部的除臭净化系统,目的在于降低该焦炭塔内的压力,加速塔内水汽化,进而提高冷焦速度,以保证不影响其他操作步骤的时间。The deodorization and purification system at the top of the coke tower to be cooled and decoked is used in the above-mentioned soaking cold coke process, the purpose is to reduce the pressure in the coke tower, accelerate the vaporization of water in the tower, and then increase the speed of cold coke, so as to ensure that it does not affect time for other operational steps.

与现有技术相比,本发明具有以下有益效果:Compared with the prior art, the present invention has the following beneficial effects:

(1)本发明所述的除臭净化系统安装在焦炭塔塔顶,在延迟焦化装置的给水冷焦末期以及整个除焦过程中对焦炭塔内的气体进行除臭净化,有效减少了焦炭塔开盖后塔周围水汽弥漫,减少了有害气体的排放;同时,焦炭塔开盖前,塔内有害气体基本被抽空,有效减轻开盖时对操作人员安全及健康的影响;(1) The deodorization and purification system of the present invention is installed on the top of the coke tower, and deodorizes and purifies the gas in the coke tower at the end of the feed water cooling coke of the delayed coking device and during the entire decoking process, effectively reducing the amount of gas in the coke tower. After the cover is opened, the water vapor around the tower is diffused, reducing the emission of harmful gases; at the same time, before the coke tower is opened, the harmful gases in the tower are basically evacuated, which effectively reduces the impact on the safety and health of the operators when the cover is opened;

(2)本发明在冷焦末期,利用抽空装置抽出焦炭塔内的气体,降低末期焦炭塔内压力至常压,并回收塔内轻烃气体,焦炭塔内焦炭冷却效果更好。(2) In the final stage of cold coking, the present invention uses an evacuation device to extract the gas in the coke tower, reduces the pressure in the coke tower at the end stage to normal pressure, and recovers light hydrocarbon gas in the tower, so that the coke cooling effect in the coke tower is better.

附图说明Description of drawings

图1是对比例1中现有延迟焦化装置的工艺结构示意图,Fig. 1 is the technological structure schematic diagram of existing delayed coking unit in comparative example 1,

图2是实施例1中所述延迟焦化装置的除臭净化系统的工艺结构示意图;Fig. 2 is a schematic diagram of the process structure of the deodorization and purification system of the delayed coking unit described in Example 1;

其中,1-焦炭塔,2-放空塔,3-空冷器,4-水冷器,5-气液分离罐,6-抽真空器,7-分离罐,8-冷焦水泵,9-水洗分离罐。Among them, 1-coke tower, 2-vent tower, 3-air cooler, 4-water cooler, 5-gas-liquid separation tank, 6-vacuumizer, 7-separation tank, 8-cold coke water pump, 9-water washing separation Can.

具体实施方式Detailed ways

为更好地说明本发明,便于理解本发明的技术方案,下面对本发明进一步详细说明。但下述的实施例仅仅是本发明的简易例子,并不代表或限制本发明的权利保护范围,本发明保护范围以权利要求书为准。In order to better illustrate the present invention and facilitate understanding of the technical solution of the present invention, the present invention will be further described in detail below. However, the following embodiments are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention shall be determined by the claims.

本发明具体实施例部分提供了一种用于延迟焦化装置的除臭净化系统,所述延迟焦化装置包括至少一对焦炭塔1,以及与焦炭塔1塔顶依次连接的放空塔2、空冷器3、水冷器4和气液分离罐5,所述除臭净化系统设置于延迟焦化装置中每对焦炭塔1塔顶,所述除臭净化系统包括抽真空器6和分离罐7,所述焦炭塔1塔顶气体出口与抽真空器6的气体入口相连,抽真空器6的气体出口与分离罐7的气体入口相连,分离罐7的顶部气体直通大气,分离罐7的底部物料出口与冷焦池相连。The specific embodiment part of the present invention provides a deodorization and purification system for delayed cokers, said delayed cokers include at least one coke tower 1, and a vent tower 2 and an air cooler connected in sequence with the top of the coke tower 1 3. Water cooler 4 and gas-liquid separation tank 5. The deodorization and purification system is arranged at the top of each coke tower 1 in the delayed coking device. The deodorization and purification system includes a vacuum pump 6 and a separation tank 7. The coke The gas outlet at the top of the tower 1 is connected to the gas inlet of the vacuum pump 6, the gas outlet of the vacuum pump 6 is connected to the gas inlet of the separation tank 7, the top gas of the separation tank 7 is directly connected to the atmosphere, and the bottom material outlet of the separation tank 7 is connected to the cooling chamber. The focal pool is connected.

所述除臭净化系统的除臭净化方法为:在待冷焦和除焦的焦炭塔1开盖前30min、待冷焦和除焦的焦炭塔1开盖过程以及整个除焦过程中将从待冷焦和除焦的焦炭塔1中抽出的气体进行水洗,水洗得到的不凝气体直接排放大气,水洗得到的液体进行后续处理。The deodorization and purification method of the deodorization purification system is as follows: 30 minutes before the coke tower 1 to be cooled and decoked is opened, the coke tower 1 to be cooled and decoked is opened, and during the whole decoking process, the The gas extracted from the coke tower 1 to be cooled and decoked is washed with water, the non-condensable gas obtained by the water washing is directly discharged into the atmosphere, and the liquid obtained by the water washing is subjected to subsequent treatment.

以下为本发明典型但非限制性实施例:The following are typical but non-limiting embodiments of the present invention:

实施例1:Example 1:

如图2所示,本实施例提供了一种用于延迟焦化装置的除臭净化系统,其中延迟焦化装置包括至少一对焦炭塔1,以及与焦炭塔1塔顶依次连接的放空塔2、空冷器3、水冷器4和气液分离罐5,所述除臭净化系统设置于延迟焦化装置中每对焦炭塔塔顶,所述除臭净化系统包括抽真空器6和分离罐7,焦炭塔1塔顶气体出口与抽真空器6的气体入口相连,抽真空器6的气体出口与分离罐7的气体入口相连,分离罐7的顶部气体直通大气,分离罐7的底部物料出口与冷焦池相连。As shown in Figure 2, the present embodiment provides a deodorization and purification system for a delayed coker, wherein the delayed coker includes at least one coke drum 1, and a vent tower 2 sequentially connected to the top of the coke drum 1, Air cooler 3, water cooler 4 and gas-liquid separation tank 5, the deodorization and purification system is arranged on the top of each coke tower in the delayed coking device, the deodorization and purification system includes a vacuum pump 6 and a separation tank 7, the coke tower 1 The top gas outlet is connected to the gas inlet of the vacuum pump 6, the gas outlet of the vacuum pump 6 is connected to the gas inlet of the separation tank 7, the top gas of the separation tank 7 is directly connected to the atmosphere, and the bottom material outlet of the separation tank 7 is connected to the cold coke The pool is connected.

所述除臭净化系统包括冷焦水泵8,其与分离罐7的液相入口相连。The deodorization and purification system includes a cold coke water pump 8 which is connected to the liquid phase inlet of the separation tank 7 .

所述分离罐7内设有喷淋装置,通过所述喷淋装置吸收溶解废气中的臭味气体及焦粉。The separation tank 7 is provided with a spray device, through which the odorous gas and coke powder in the dissolved waste gas are absorbed.

所述除臭净化系统通过抽真空器6以抽真空的形式,将焦炭塔1塔顶出来的废气吸入至分离罐7内,通过冷焦水喷淋冷却,将气体中可凝结的废气及焦粉溶解在冷焦水中,不凝气排放至大气。The deodorization and purification system sucks the waste gas from the top of the coke tower 1 into the separation tank 7 through the vacuum pump 6 in the form of vacuum, and sprays and cools the condensable waste gas and coke in the gas by cooling the coke water. The powder is dissolved in cold coke water, and the non-condensable gas is discharged to the atmosphere.

所述除臭净化系统的处理方法为:The processing method of the deodorizing purification system is:

对待冷焦和除焦的焦炭塔1采用溢流冷焦进行给水冷焦,当待冷焦和除焦的焦炭塔1塔顶温度<150℃,塔顶压力<0.1MPag时,将待冷焦和除焦的焦炭塔1塔顶出口由送至放空塔2改成送至溢流线,打开待冷焦和除焦的焦炭塔1溢流管线上的溢流阀,关闭至放空塔2管线上的放空阀,开始溢流冷却焦炭。The coke tower 1 to be chilled and decoked uses overflow chilled coke for feed water cooling, when the temperature at the top of the coke tower 1 to be chilled and decoked is <150°C and the pressure at the top of the tower is <0.1MPag, the coke to be chilled The top outlet of the coke tower 1 for decoking is changed from being sent to the vent tower 2 to the overflow line, the overflow valve on the overflow line of the coke tower 1 to be cooled and decoked is opened, and the pipeline to the vent tower 2 is closed Open the vent valve on the top, and start overflowing to cool the coke.

在待冷焦和除焦的焦炭塔1的温度降至85℃,溢流冷焦结束,将待冷焦和除焦的焦炭塔1中水排净后,启用除臭净化系统将待冷焦和除焦的焦炭塔1中的气体抽出进行水洗分离,30min后开启待冷焦和除焦的焦炭塔1的顶盖和底盖进行除焦,待冷焦和除焦的焦炭塔1的开盖过程以及整个除焦过程中均保持除臭净化系统在开启状态;When the temperature of the coke tower 1 to be cooled and decoked drops to 85°C, the overflow cold coking ends, and after the water in the coke tower 1 to be cooled and decoked is drained, the deodorization and purification system is activated to remove the cold coke and the gas in the decoking coke tower 1 is taken out for water washing and separation, and after 30 minutes, the top cover and the bottom cover of the coke tower 1 to be cooled and decoked are opened for decoking, and the coke tower 1 to be cooled and decoked is opened Keep the deodorization and purification system on during the capping process and the entire decoking process;

在溢流冷焦的进水中,当待冷焦和除焦的焦炭塔1中水从焦炭塔1塔顶溢流出,待冷焦和除焦的焦炭塔1塔顶温度>150℃,塔顶压力>0.1MPa时,投用除臭净化系统。In the overflow cold coke influent, when the water in the coke tower 1 to be cooled and decoked overflows from the top of the coke tower 1, the temperature at the top of the coke tower 1 to be cooled and decoked>150℃, the tower When the top pressure is greater than 0.1MPa, the deodorization and purification system should be used.

抽真空器6从待冷焦和除焦的焦炭塔1中抽出的气体进入分离罐7进行水洗,水洗得到的不凝气体排放至大气,水洗得到的液体进行后续处理。The gas extracted by the vacuum device 6 from the coke tower 1 to be cooled and decoked enters the separation tank 7 for water washing, the non-condensable gas obtained by the water washing is discharged to the atmosphere, and the liquid obtained by the water washing is subjected to subsequent treatment.

采用本实施例所述的系统进行除臭净化,可有效减少焦炭塔开盖后塔周围水汽弥漫,减少有害气体排放,有效减轻开盖时对操作人员安全及健康的影响。Using the system described in this embodiment for deodorization and purification can effectively reduce the water vapor around the coke tower after the cover is opened, reduce harmful gas emissions, and effectively reduce the impact on the safety and health of operators when the cover is opened.

对比例1:Comparative example 1:

如图1所示,本对比例为现有典型的延迟焦化装置,其包括至少一对焦炭塔1,以及与焦炭塔1塔顶依次连接的放空塔2、空冷器3、水冷器4和水洗分离罐9。As shown in Figure 1, this comparative example is an existing typical delayed coking unit, which includes at least one coke tower 1, and a vent tower 2, an air cooler 3, a water cooler 4 and a water washing machine that are sequentially connected to the top of the coke tower 1. Separation tank 9.

本对比例所述系统的焦炭塔在进行冷焦和除焦过程中,焦炭塔打开塔顶呼吸阀后,由于背压降低,塔内的水再次汽化,并携带塔内烃类及含硫气体带出,造成塔周围水汽弥漫,同时污染环境,损害人体健康;且放水后打开焦炭塔顶盖前,塔内焦炭温度仍有80℃,塔内压力大于常压,对操作人员安全及健康存在严重的安全隐患。During the cooling and decoking process of the coke tower of the system described in this comparative example, after the coke tower opens the breather valve at the top of the tower, the water in the tower is vaporized again due to the decrease in back pressure, and carries hydrocarbons and sulfur-containing gases in the tower If it is taken out, the water vapor around the tower will be diffused, polluting the environment and damaging human health; and before the top cover of the coke tower is opened after the water is released, the temperature of the coke in the tower is still 80°C, and the pressure in the tower is greater than normal pressure, which is harmful to the safety and health of the operators. Serious safety hazard.

并且本对比例所述系统在泡焦操作过程中,焦炭不容易冷却透彻,特别是操作末期,塔内温度较低,水的汽化速率降低,导致冷焦时间长,影响装置处理能力。In addition, during the coke soaking operation of the system described in this comparative example, the coke is not easy to cool thoroughly, especially at the end of the operation, the temperature in the tower is low, and the vaporization rate of water decreases, resulting in a long cooling time and affecting the processing capacity of the device.

综合实施例1和对比例1可以看出,本发明所述的除臭净化系统安装在焦炭塔塔顶,在延迟焦化装置的给水冷焦末期以及整个除焦过程中对焦炭塔内的气体进行除臭净化,有效减少了焦炭塔开盖后塔周围水汽弥漫,减少了有害气体的排放;同时,焦炭塔开盖前,塔内有害气体基本被抽空,有效减轻开盖时对操作人员安全及健康的影响;Comprehensive Example 1 and Comparative Example 1, it can be seen that the deodorization and purification system of the present invention is installed on the top of the coke tower, and the gas in the coke tower is cleaned at the end of the feed water cooling of the delayed coking unit and during the entire decoking process. Deodorization and purification can effectively reduce the water vapor around the coke tower after the cover is opened, reducing the emission of harmful gases; at the same time, before the coke tower is opened, the harmful gases in the tower are basically evacuated, effectively reducing the safety and health effects;

同时,本发明在浸泡冷焦末期,利用抽空装置抽出焦炭塔内的气体,降低末期焦炭塔内压力,并回收塔内轻烃气体,焦炭塔内焦炭冷却速加快。At the same time, the present invention uses an evacuation device to extract the gas in the coke tower at the end of soaking cold coke, reduces the pressure in the coke tower at the end stage, and recovers light hydrocarbon gas in the tower, so that the coke cooling speed in the coke tower is accelerated.

申请人声明,本发明通过上述实施例来说明本发明的详细方法,但本发明并不局限于上述详细方法,即不意味着本发明必须依赖上述详细方法才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明产品各原料的等效替换及辅助成分的添加、具体方式的选择等,均落在本发明的保护范围和公开范围之内。The applicant declares that the present invention illustrates the detailed methods of the present invention through the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed methods, that is, it does not mean that the present invention must rely on the above-mentioned detailed methods to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

Claims (3)

1. A deodorizing and purifying method for a deodorizing and purifying system of a delayed coking device, wherein the delayed coking device comprises at least one pair of coke drums (1), and an emptying tower (2), an air cooler (3), a water cooler (4) and a gas-liquid separation tank (5) which are sequentially connected with the tops of the coke drums (1), the deodorizing and purifying system is arranged at the tops of each pair of coke drums (1) in the delayed coking device, the deodorizing and purifying system comprises a vacuumizing device (6) and a separation tank (7), a gas outlet at the tops of the coke drums (1) is connected with a gas inlet of the vacuumizing device (6), a gas outlet of the vacuumizing device (6) is connected with a gas inlet of the separation tank (7), top gas of the separation tank (7) is communicated with the atmosphere, and a bottom material outlet of the separation tank (7) is connected with a cold coke pool;
the deodorizing and purifying method comprises the following steps:
the deodorizing and purifying system is kept in an open state 30min before the coke tower (1) to be cooled and decoked is uncapped, the deodorizing and purifying system is kept in an open state in the uncapping process of the coke tower (1) and the whole decoking process, gas pumped from the coke tower (1) to be cooled and decoked is washed, noncondensable gas obtained by washing is directly discharged, and liquid obtained by condensation and separation enters a coke cooling tank;
in the water supply cooling stage of the coke tower (1) to be cooled and decoked, when the water level in the coke tower (1) to be cooled and decoked overflows from the top of the coke tower (1), the top temperature of the coke tower (1) to be cooled and decoked is more than 150 ℃, and the top pressure is more than 0.1MPa, starting a deodorizing and purifying system;
the deodorizing and purifying system sucks waste gas from the top of the coke tower (1) into the separating tank (7) in a vacuumizing mode through the vacuumizing device (6), sprays and cools the coke water, dissolves condensable waste gas and coke powder in the gas into the coke water, and discharges noncondensable gas to the atmosphere.
2. The deodorizing and purifying method according to claim 1, characterized in that said deodorizing and purifying system comprises a coke cooling water pump (8), said coke cooling water pump (8) being connected to the liquid phase inlet of the separation tank (7).
3. The deodorizing and purifying method according to claim 1 or 2, characterized in that a spraying device is provided in the separating tank (7), and the odor gas and coke powder in the dissolved exhaust gas are absorbed by the spraying device.
CN201710150844.8A 2016-12-15 2017-03-14 Deodorization purification system for delayed coking device and deodorization purification method thereof Active CN106669373B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611159406.XA CN106422683A (en) 2016-12-15 2016-12-15 Deordorizing and purifying system for delayed coking device and deordorizing and purifying method thereof
CN201611159406X 2016-12-15

Publications (2)

Publication Number Publication Date
CN106669373A CN106669373A (en) 2017-05-17
CN106669373B true CN106669373B (en) 2023-05-12

Family

ID=58217265

Family Applications (3)

Application Number Title Priority Date Filing Date
CN201611159406.XA Pending CN106422683A (en) 2016-12-15 2016-12-15 Deordorizing and purifying system for delayed coking device and deordorizing and purifying method thereof
CN201710150844.8A Active CN106669373B (en) 2016-12-15 2017-03-14 Deodorization purification system for delayed coking device and deodorization purification method thereof
CN201720245094.8U Active CN206613345U (en) 2016-12-15 2017-03-14 A kind of deodorization cleaning system for delayed coking unit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201611159406.XA Pending CN106422683A (en) 2016-12-15 2016-12-15 Deordorizing and purifying system for delayed coking device and deordorizing and purifying method thereof

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201720245094.8U Active CN206613345U (en) 2016-12-15 2017-03-14 A kind of deodorization cleaning system for delayed coking unit

Country Status (1)

Country Link
CN (3) CN106422683A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106422683A (en) * 2016-12-15 2017-02-22 上海优华系统集成技术股份有限公司 Deordorizing and purifying system for delayed coking device and deordorizing and purifying method thereof
CN108636011A (en) * 2018-05-24 2018-10-12 董国良 A kind of delayed coking emptying tower spray system
CN110559717B (en) * 2019-10-10 2024-05-28 涧光(上海)特种装备有限公司 Closed tank type decoking dehydration tank
CN114369473A (en) * 2020-10-15 2022-04-19 山东方宇润滑油有限公司 Oil-based needle coke coking tower vent gas recovery device and process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212474A (en) * 2013-06-03 2014-12-17 中国石化工程建设有限公司 Device and method for eliminating waste steam discharged from top of coke tower

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102491578B (en) * 2011-12-27 2014-03-26 华东理工大学 Method for stripping emptying tower top sewage by utilizing coke tower waste heat
CN103084004B (en) * 2013-01-15 2015-04-08 中国寰球工程公司 Coke cooling water and coke cutting water mutually combined purifying and recycling method
CN106422683A (en) * 2016-12-15 2017-02-22 上海优华系统集成技术股份有限公司 Deordorizing and purifying system for delayed coking device and deordorizing and purifying method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212474A (en) * 2013-06-03 2014-12-17 中国石化工程建设有限公司 Device and method for eliminating waste steam discharged from top of coke tower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
镇海焦化装置引进技术先进性的探讨;陈永凤等;《石油化工设计》;20131231;第1-4页 *

Also Published As

Publication number Publication date
CN106669373A (en) 2017-05-17
CN106422683A (en) 2017-02-22
CN206613345U (en) 2017-11-07

Similar Documents

Publication Publication Date Title
CN206897093U (en) A kind of coking plant low pressure loss gas recycling and processing device
CN106669373B (en) Deodorization purification system for delayed coking device and deodorization purification method thereof
CN104419444B (en) A kind of method utilizing the moisture sump oil of delayed coking unit freshening
CN101314104B (en) Apparatus for processing effluvial tail gas of heavy slop tank
CN203525537U (en) Delayed coking tail gas treatment device
JP7283833B2 (en) Continuous treatment process and equipment for highly concentrated organic wastewater
CN206940802U (en) A kind of aqueous heavy dirty oil continuous dehydration freshening and wastewater reusing device
CN102847398A (en) Apparatus and method for treating waste steam discharged from decoking step of delayed coking process
CN108096999B (en) Reboiler method negative pressure crude benzene distillation process
CN108636108A (en) Tail gas clean-up technique is produced in change based on the collaboration of coking production process
CN105154144A (en) Negative-pressure debenzylation device and negative-pressure debenzolization method
CN107890684B (en) Reboiler method negative pressure crude benzol distillation system
RU2544993C1 (en) Method of removing hydrogen sulphide from decomposition gases from apparatus for atmospheric-vacuum or vacuum distillation of oil
CN106914068A (en) A kind of delayed coking exhaust gas treating method
CN103112984B (en) Method and device for comprehensive treatment of exhaust gas pollution of acidic water material tank
CN206553370U (en) A kind of sludge combined treatment device
CN206996840U (en) A kind of catalytic cracking flue gas processing structure
CN114854461B (en) Method for regenerating hot lean oil under negative pressure debenzolization process condition
CN111822059B (en) Hydrogenation catalyst regeneration and waste gas treatment device and method
CN111068493B (en) Coking tail gas treatment process and device
CN113599924A (en) Natural gas gathering station flare gas recovery process and corollary equipment
CN107639090A (en) Acid water storage tank shut-down (breakdown) mainteance sulphur iron rot product incidents of spontaneous combustion prevention method
CN206191609U (en) Coking exhaust -gas treatment&#39;s device
CN111547871A (en) A kind of aromatics stripping tower acid water recovery and utilization system
CN205815383U (en) A kind of delayed coking exhaust gas processing device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A deodorization and purification system for delayed coking unit and its deodorization and purification method

Granted publication date: 20230512

Pledgee: Industrial Bank Co.,Ltd. Shanghai Pudong Sub branch

Pledgor: SHANGHAI YOUHUA SYSTEM INTEGRATION TECHNOLOGY Co.,Ltd.

Registration number: Y2024310001192