Apparatus and method for preventing coking drum oil gas vent from coking

Abstract

The invention relates to a device for preventing the oil and gas outlet of a coking tower from being coked and the application method, which comprises that at least two levels of quenching oil injection equipments are adopted on the oil and gas pipeline at the oil and gas outlet position at the top of the coking tower. Wherein a first level injection is arranged at the oil and gas outlet position at the top of the tower, which is close to the cover head of the coking tower as much as possible and can stop pyrogenic reaction as early as possible; quenching oil is mainly centralized at the oil and gas outlet position at the top of the tower through a multi points injection mode, thus the first level injection is ensured to be fully contaced with the oil and gas to reduce the temperature; a second level injection is arranged at the oil and gas pipeline after the first level injection is injected. The method further improves the processing capacity of the coking tower, and ensures the operating pressure of the coking tower is reduced, the method is favorable for improving the yield of the liquid products of the device, thus to ensure the applicability of the device on processing the residual oil with high asphaltine content to be improved.

Description

technical field [0001] The invention relates to a device for preventing coking at the top of a coke tower and facilitating decoking and its use method, more specifically, a method and equipment for preventing coking at the oil gas outlet of a coke tower. Background technique [0002] In the existing refining process, various heavy hydrocarbon oils are generally refined by delayed coking process, so that the heavy hydrocarbon oils undergo thermal cracking reaction and condensation reaction in the coke tower to generate gas, liquid and solid coke. Usually, the oil gas (gas, liquid) after the thermal cracking reaction is discharged through the oil and gas pipeline at the top of the coke tower, enters the fractionation tower to fractionate the products, and the generated solid coke is deposited in the coke tower. [0003] The common problem at present is that coking is easy to occur on the oil and gas outlet pipeline at the top of the coke tower. This is mainly due to the high t...

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Problems solved by technology

[0004] In order to overcome the unreasonable or certain defects in the injection position or injection method of the quenching oil in the prior art, and reduce the coking phenomenon that often occurs in the oil and gas pipeline at the top of the coke tower, one of the purposes of the present invention is to provide a method to prevent the oil and gas outlet of the coke tower A device that cokes and facilitates decoking

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