Delayed coking method

A delayed coking method and coking tower technology, which are applied in the field of non-catalytic thermal cracking, can solve the problems of long coke production cycle of delayed coking unit, reduction of the treatment capacity of the absorption stabilization part, and large treatment capacity of the absorption stabilization part, so as to reduce the load and reduce the Energy consumption, the effect of reducing equipment size

Active Publication Date: 2014-01-01
CHINA PETROCHEMICAL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims at the disadvantages of the prior art, such as long coking period of delayed coking unit, large processing capacity of absorption and stabilization part, high energy consumption, etc., and proposes a delayed coking method, which shortens the long coking period of delayed coking unit and reduces the treatment of absorption and stabilization part amount, reduce energy consumption

Method used

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Embodiment 1

[0021] The first-stage condensation scheme of the 1.3 million tons / year delayed coking unit of the existing technology is adopted, and the oil gas at the top of the fractionation tower is cooled to 40°C.

Embodiment 2

[0023] The first-stage condensation scheme of the 1.3 million tons / year delayed coking unit of the existing technology is adopted, and the oil gas at the top of the fractionation tower is cooled to 80°C.

Embodiment 3

[0025] For the 1.3 million tons / year delayed coking unit secondary condensation scheme of the present invention, such as figure 2 As shown, the delayed coking products are fractionated in the fractionation tower 1, and the oil gas at the top of the fractionation tower is cooled to 90°C by the air cooler 2 at the top of the fractionation tower, and then enters the first-stage oil-gas separation tank 4 at the top of the fractionator, and the first-stage coked naphtha 10 is separated. The gasoline pump 9 sends out the device, and the separated gas enters the secondary oil-gas separation tank 11 at the top of the fractionating tower after being cooled to 40°C by the aftercooler 3 at the top of the fractionating tower, and the gas separated from the secondary oil-gas separation tank 11 at the top of the fractionating tower is used as The rich gas 6 enters the absorption stabilization system, and the separated naphtha passes through the naphtha pump 7 to the absorption tower.

[00...

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Abstract

The invention discloses a delayed coking method which comprises the following steps: cooling oil and gas at an oil-gas separation tank top of a fractionation tower to 70-100 DEG C by an air cooler at the fractionation tower top, introducing the oil and gas to a first-stage oil-gas separation tank at the fractionation tower top, separating first-stage coked naphtha and gas, cooling the separated gas to 50-30 DEG C by a rear cooler at the fractionation tower top, introducing the cooled gas to a second-stage oil-gas separation tank at the fractionation tower top, and introducing the separated gas from the second-stage oil-gas separation tank at the fractionation tower top to an absorbing and stabilizing system.

Description

technical field [0001] The invention belongs to the non-catalytic thermal cracking of hydrocarbon oil without operating hydrogen, in particular to a delayed coking method. Background technique [0002] The delayed coking process has the advantages of strong raw material adaptability, thorough decarbonization, simple process, mature technology, and low equipment investment. It has become one of the important processes for deep processing of heavy oil. my country is one of the countries with rapid development of delayed coking processing capacity and technology in the world, and the technical level is already close to the advanced level of foreign countries. At the end of 2006, the processing capacity of delayed coking has exceeded 50Mt / a, and it is expected to reach 70Mt / a in 2010, second only to the United States; the scale of a single unit has reached 2.1Mt / a. In recent years, with the heavy quality of imported crude oil and the application of deep-drawing technology, heav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04C10G7/00
Inventor 李和杰郭永博徐江华王辰涯
Owner CHINA PETROCHEMICAL CORP
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