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Tail gas emission and recovery system of gasoline sweetening production device

A production device and tail gas emission technology, which is applied in the fields of liquid hydrocarbon mixture recovery, petroleum industry, and multi-stage series refining process treatment, etc., can solve problems such as pollution, non-compliant production, loss of gasoline environment, etc., to prevent excessive pressure effect

Pending Publication Date: 2022-08-09
DAQING ZHONGLAN PETROCHEMICAL CO LTD
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem in the background technology that the existing gasoline desulfurization tail gas carries a large amount of light gasoline to the high point of the site for on-site discharge, which not only loses a large amount of gasoline, but also causes pollution to the environment and does not meet the production requirements. A tail gas emission recovery system for a gasoline sweetening production plant, which can effectively recover the gasoline carried in the tail gas, improve the gasoline yield, and achieve the purpose of energy saving and emission reduction

Method used

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  • Tail gas emission and recovery system of gasoline sweetening production device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] as attached figure 1 As shown, the tail gas emission recovery system of this gasoline desulfurization production unit comprises gasoline desulfurization reactor 1, and the top feed line of described gasoline desulfurization reactor 1 connects gasoline pipeline 2 and non-purified air pipeline 3; gasoline desulfurization reactor 1 1. The bottom outlet pipeline is connected to the oil and gas separation tank 4.

[0030] The 4 tank bottom pipelines of the oil and gas separation tank are connected to the refined gasoline pump 12, and the refined gasoline is drawn out and sent to the tank farm through the refined gasoline pump 12; Condensed into a liquid phase for recovery; a control valve 13 is connected to the top pipeline of the oil and gas separation tank 4.

[0031] The rear tank of the cooler 5 is connected to a buffer tank 6, which is used to contain the gaso...

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Abstract

The invention relates to a tail gas emission recovery system of a gasoline mercaptan removal production device. The method mainly solves the problems that part of gasoline is lost, environmental protection is seriously substandard and potential safety hazards exist due to on-site high-point emission of a large amount of light gasoline carried by the existing gasoline sweetening tail gas. The device is characterized in that a top feeding pipeline of the gasoline sweetening reactor is connected with a gasoline pipeline and a non-purified air pipeline; a discharge hole pipeline at the bottom of the gasoline mercaptan removal reactor is connected with an oil-gas separation tank; a tank bottom pipeline of the oil-gas separation tank is connected with a refined gasoline pump, and refined gasoline is pumped out through the refined gasoline pump and conveyed to a tank area; a tank top pipeline of the oil-gas separation tank is connected with a cooler; the cooler rear tank is connected with a buffer tank, the buffer tank is provided with a liquid level meter, and the bottom of the buffer tank is connected with a metering pump. The system effectively recovers gasoline carried in the tail gas, optimizes the on-site emission process of the tail gas, realizes energy conservation and emission reduction, improves the gasoline yield of the device, and is safe, environment-friendly and suitable for production.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a tail gas emission recovery system of a gasoline desulfurization production device. Background technique [0002] The crude gasoline from the gasoline hydrogenation unit is mixed with the non-purified air and then enters the gasoline desulfurization reactor. Under the action of the gasoline desulfurization catalyst, the desulfurization reaction occurs. ) is oxidized to disulfide to remove mercaptans in gasoline. The mixture of gasoline and air after the reaction flows out from the discharge port at the bottom of the gasoline desulfurization reactor and enters the oil and gas separation tank, where it is naturally separated from the excess air in the oil and gas separation tank, and the separated gas phase (excess air) is separated by oil and gas. The tank top pressure control valve controls 0.2Mpa high point venting. The refined gasoline after desulfurization is...

Claims

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Application Information

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IPC IPC(8): C10G5/06C10G53/02
CPCC10G5/06C10G53/02C10G2300/202C10G2300/4006C10G2300/4012C10G2300/4081C10G2400/02
Inventor 许肖慧冉令军王飞郑德金谷凡军孙昱
Owner DAQING ZHONGLAN PETROCHEMICAL CO LTD
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