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Control method for delaying coking process

A coking process and coking tower technology, which is applied in the coking of carbon-containing materials, coke ovens, petroleum industry, etc., can solve the problems of gate valve or ball valve being easy to coke, increasing equipment investment cost, and expensive ball valve or gate valve.

Inactive Publication Date: 2010-07-14
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such ball valves or gate valves with larger pipe diameters are very expensive, which increases the investment cost of the equipment. At the same time, the gate valves or ball valves used for regulating operations still have the risk of coking and failure.

Method used

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  • Control method for delaying coking process

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] in such as figure 1 In the delayed coking process shown,

[0025] (1) Thermal coking oil, about 500°C, about 200 tons / hour, is fed into the coking tower 1 from the bottom of the coking tower 1 for coking,

[0026] (2) The volume of coking tower 1 is about 1800m 3 , the tower diameter is The operating temperature is 450-490°C, the operating pressure is 0.1-0.3MPa(g), and the coking time is 20 hours. After the coking reaction is completed, the coking tower 1 filled with coke is steamed to remove the residual volatile matter in the coke bed in the tower. hydrocarbons. Steam blowing for about 2 hours, after the hydrocarbons that can be blown out are blown out, the tower is filled with cold coke water for cold coke. The water is then drained out of the tower, the coke bed is cut, the coke is removed from the bottom of the tower, and the upper end caps are reinstalled. Carry out the next coking operation.

[0027](3) While adding hot coker oil to the bottom of the abov...

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PUM

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Abstract

The invention relates to a method for controlling the preheating speed of a coking tower during the periodical switching operation among coking towers in the process of delaying coking, which improves the operating environmental conditions of a control system by changing the regulatory site for controlling a tower warming speed in the preheating operation of the coking tower, greatly prolongs the service life of equipment, and reduces equipment investment.

Description

technical field [0001] The present invention relates to a control method in the delayed coking process, and more specifically relates to a method for controlling the preheating speed of the coking tower during the periodical switching operation of the coking tower in the delayed coking process. Background technique [0002] In the existing refining process, the delayed coking process is used to coke various heavy hydrocarbon materials, so that the heavy hydrocarbons are pyrolyzed and condensed in the coking tower to generate lighter hydrocarbon gases and solid coke. Usually, the gas discharged from the top of the coking tower enters the fractionation tower, and the gas and liquid products are fractionated. Part of the liquid is condensed and flows into the bottom of the fractionation tower as circulating oil, and is pumped together with the heavy hydrocarbon materials to be processed through the heating furnace to a suitable temperature. Temperature, after providing heat for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00
Inventor 胡刚李出和林雄森
Owner CHINA PETROCHEMICAL CORP