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Method for alleviating coking of coke tower top oil gas pipeline

A tower top oil and gas, oil and gas technology, applied in the petroleum industry, cracking, non-catalytic thermal cracking and other directions, can solve the problem of not reducing the oil and gas temperature at the top of the coke tower, and achieve the goal of reducing the carrying capacity, improving the properties, and reducing the content of coke powder. Effect

Active Publication Date: 2014-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing technology cannot reduce the temperature of the oil gas at the top of the coke tower so as to suppress the secondary reaction in time, thereby effectively slowing down the coking of the oil gas pipeline at the top of the coke tower

Method used

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  • Method for alleviating coking of coke tower top oil gas pipeline
  • Method for alleviating coking of coke tower top oil gas pipeline
  • Method for alleviating coking of coke tower top oil gas pipeline

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Experimental program
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Effect test

Embodiment 1

[0027] The properties of raw oil are shown in Table 1. The high-temperature material at 498°C from the radiant section of the heating furnace enters the tower from the bottom of the coke tower, and the oil and gas after entering the tower undergo coking reaction; inject an appropriate amount of quenching oil at 4m below the oil and gas outlet at the top of the coke tower, and the quenching oil comes from coking fractionation The 200°C coking wax oil in the coke tower is sprayed from three evenly distributed nozzles with droplets of 50 μm to 300 μm and covers the cross section of the coke tower. The pipeline adopts the traditional method to quench again to 420°C, and then goes to the fractionation tower for fractionation. Other operating conditions and test results are shown in Table 2.

Embodiment 2

[0031] The raw material oil property is with embodiment 1. The high-temperature material at 498°C from the radiant section of the heating furnace is fed from the upper part of the coke tower, and the feed is dispersed to the tower wall at 0.3m below the tangential height of the coke tower through the distributor and enters the tower in a swirling manner. After entering the tower Coking reaction of the oil and gas in the coke tower; inject an appropriate amount of quenching oil at 2.5m below the oil and gas outlet at the top of the coke tower. Droplets spray out and cover the cross-section of the coke tower, and the temperature of the oil and gas exiting the tower after quenching is 441°C; the oil and gas exiting the tower is quenched to 423°C by traditional methods on the outlet pipeline, and then goes to the fractionating tower for fractionation. The results are shown in Table 2.

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Abstract

The invention provides a method for alleviating coking of a coke tower top oil gas pipeline. The method comprises the following steps: 1, spraying parts of quenching oil into a coke tower from the upper part or the top of the coke tower, and pre-quenching a coke tower top oil gas; and 2, spraying the other parts of the quenching oil in a tower outlet oil gas pipeline into the pipeline, and quenching the high temperature oil gas in the tower outlet oil gas pipeline. The method allows the temperature of the coke tower top oil gas to be effectively reduced and a secondary reaction to be timely inhibited, so the coking of the coke tower top oil gas pipeline can be effectively alleviated, and the on-stream period of a coking delay apparatus is prolonged.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and relates to a method for reducing the outlet temperature of oil and gas at the top of a coke tower, in particular to a method for slowing down or preventing coking of an oil and gas pipeline at the top of a coke tower. Background technique [0002] The delayed coking process has the advantages of strong adaptability to raw materials, thorough decarbonization, simple process, mature technology, and low equipment investment. It has become one of the important processes for deep processing of heavy oil. In recent years, with the heavy crude oil processed and the application of deep drawing technology, heavy oil with high carbon residue, high sulfur, and high metal content is difficult to be used as blending materials for catalytic cracking devices, which further promotes the development of delayed coking technology. [0003] In the delayed coking process, the high-temperature material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/00C10G9/16
Inventor 黄新龙王洪彬徐江华王少锋王晨涯孙爱明袁强李节
Owner CHINA PETROLEUM & CHEM CORP
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