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Method for raising production efficient of delayed coking liquid product

A liquid product, delayed coking technology, used in cracking, non-catalytic thermal cracking, petroleum industry, etc., can solve the problems of increasing equipment investment, reducing the contribution of coke yield, and not so much, so as to reduce coke yield and reduce equipment investment. , the effect of reducing costs

Inactive Publication Date: 2005-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, an additional heating furnace mentioned in the method is used to separately heat the non-coking hydrocarbon diluent, which increases equipment investment and complicates the process; in addition, the non-coking hydrocarbon diluent used in this method is 168 -450°C fraction, this fraction contains part of diesel fraction and part of wax oil fraction. It is uneconomical to use diesel fraction as diluent, and the use of wax oil as diluent has little contribution to reducing the coke yield. In addition, this fraction is heavier. Enthalpy value is lower than that of lighter fractions

Method used

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  • Method for raising production efficient of delayed coking liquid product
  • Method for raising production efficient of delayed coking liquid product

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Embodiment Construction

[0025] As shown in Figure 1, the raw oil enters the heating furnace 3 through the pipeline 1 for heating, and the low-molecular hydrocarbon heating agent enters the radiation zone of the heating furnace 3 along the pipeline 2. After being heated to the required temperature, the raw oil and low-molecular The hydrocarbons pass through the pipeline 4 and the pipeline 5 together and enter the coke 7 through the pipeline 6 to undergo coking reaction, and the coking reaction product enters the fractionation tower 11 from the top of the coking tower 7 through the pipeline 8 and the pipeline 9, and the various hydrocarbons are separated in the fractionation tower 11. product. C 1 、C 2 Export device via line 18, C 3 、C 4 A part is exported to the device through the pipeline 17, and the other part is circulated as a heating agent to the high-temperature radiation area of ​​the raw material heating furnace through the pipelines 20 and 21 for recycling; C 5Part of the -180°C distillat...

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Abstract

The invention discloses a delayed coking process for prolific liquid products, which is characterized in that in the conventional delayed coking process, a low-molecular hydrocarbon heating agent with high heat enthalpy that does not coke at high temperature is added to the coking tower to increase the The reaction temperature of the liquid in the coking tower increases the yield of coking liquid products and decreases the yield of coke products.

Description

1. Technical field [0001] The invention belongs to the delayed coking process, more specifically, it is a method for increasing the liquid product yield in the delayed coking operation process. 2. Background technology [0002] Delayed coking, as one of the heavy oil processing methods, has been used in the oil refining industry for many years. The process uses heavy and low-quality residual oil as raw material. After being heated by a heating furnace, it enters the coking tower, and is thermally decomposed in the coking tower to generate gas products, liquid products with different boiling points and coke products. [0003] At present, the raw material processed by the delayed coking unit of the refinery is getting heavier and heavier, the coke yield is as high as 30w%-40w%, and the liquid product is quite small. The delayed coking unit is limited by the coke yield, and the increase of the operating temperature can only be completed by the heating furnace. Increasing the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/16
Inventor 张学萍李宝忠许凤军勾连忠王凤秀
Owner CHINA PETROLEUM & CHEM CORP
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