A coking tail gas treatment device

Abstract

The invention discloses a coking tail gas treatment device to solve the problems of water vapor, malodorous gas pollution, secondary pollution caused by the discharge of tail gas VOC and coke powder along with the tail gas in the existing delayed coking device. The coking tail gas treatment device includes a tail gas treatment tower. The tail gas treatment tower is sequentially composed of a desaturation section, a desulfurization section, a gas-liquid separation section and a settling section from top to bottom. A desulfurization section oil collecting tank is arranged below the desulfurization section in the tail gas treatment tower. Below the gas-liquid separation section, there are coke tower tail gas and other equipment in the coking unit to generate tail gas injection pipeline, coke tank tail gas injection pipeline, coke tower discharge steam injection pipeline, and the bottom of the tail gas treatment tower is provided with washing sewage extraction pipeline The lower part of the settling section is provided with a washing water extraction bucket, the upper part of the desulfurization section is provided with an absorbing liquid injection line, the lower part of the desulfurization section oil collection tank is provided with a desulfurization section oil collection tank extraction outlet, and the top of the tail gas treatment tower is provided with a desaturated coking tail gas pipeline.

Description

technical field [0001] The invention belongs to the field of coking tail gas treatment in the process of petroleum processing, and relates to a coking tail gas treatment device. Background technique [0002] Delayed coking process is an important residual oil processing process in petroleum processing flow. After the raw material is heated to about 500 ℃ by heat exchange and coking furnace, it enters the coke drum for thermal cracking reaction and condensation reaction, and generates oil and gas and solid coke in the coke drum. The oil and gas generated by the thermal cracking 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. The solid coke is deposited in the coke drum and is periodically decoked to the coke pool. [0003] In the coking process, high-pressure water is usually used for drilling and coke cutting, and the cut and crushed cok...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a coking tail gas treatment device to solve the problem of secondary pollution caused by the water vapor and odor gas pollution in the coke pool and coke tower of the existing delayed coking device, tail gas VOC and coke powder discharged with the tail gas, and the device Exhaust gas leakage problems in interior and other equipment

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