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Combined process and device for dust removal for pyrolysis coal gas and delayed coking for heavy oil

A pyrolysis gas and delayed coking technology, which is applied in the field of coal chemical industry, can solve the problems of large wastewater treatment volume, high energy consumption, and low dust removal efficiency, and achieve the effects of reducing ash content, low energy consumption, and energy consumption

Active Publication Date: 2015-07-08
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to solve the problems of low dust removal efficiency, poor tar quality, large waste water treatment capacity and high production cost in the crude gas dust removal process in the prior art due to the method of cyclone separation first, water washing and then electric dust removal. Further provide a pyrolysis gas dust removal process and device with high dust removal efficiency, good tar quality, no waste water generation and low cost investment
[0007] Another object of the present invention is to solve the problems of difficult operation and high energy consumption caused by the "one furnace and two towers" process of delayed coking of heavy oil in the prior art, and to provide a method with simple operation and low energy consumption. Process and device combining dedusting of pyrolysis gas and delayed coking of heavy oil

Method used

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  • Combined process and device for dust removal for pyrolysis coal gas and delayed coking for heavy oil

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The dedusting process of the pyrolysis gas described in the present embodiment comprises the following steps:

[0055] (1) The raw coal is contacted with a gas whose temperature is 200° C. and whose oxygen content is 5v% for 70 minutes to obtain dry coal with a particle size of 0.2-30 mm;

[0056] (2) Dry coal enters the moving bed reactor at a constant speed continuously, and flows out of the moving bed reactor at a constant speed from top to bottom, thereby forming a moving bed particle layer in the reaction chamber of the moving bed reactor; and during this process, the temperature is The coal pyrolysis gas at 400°C and the pressure of 100Pa enters the reaction chamber through the bottom of the moving bed reactor and contacts the moving bed particle layer in reverse. The flow rate ratio of the coal pyrolysis gas to the moving bed particle layer is 130:1. The high specific surface area and filtration accuracy realize the dedusting treatment of coal pyrolysis gas, and ...

Embodiment 2

[0059] The dedusting process of the pyrolysis gas described in the present embodiment comprises the following steps:

[0060] (1) The raw coal is contacted with a gas whose temperature is 250° C. and whose oxygen content is 3v% for 55 minutes to obtain dry coal with a particle size of 0.2-30 mm;

[0061] (2) Dry coal enters the moving bed reactor at a constant speed continuously, and flows out of the moving bed reactor at a constant speed from top to bottom, thereby forming a moving bed particle layer in the reaction chamber of the moving bed reactor; and during this process, the temperature is The coal pyrolysis gas at 500°C and the pressure of -100Pa enters the reaction chamber through the bottom of the moving bed reactor and is in reverse contact with the moving bed particle layer. The flow rate ratio of the coal pyrolysis gas to the moving bed particle layer is 90:1. The high specific surface area and filtration accuracy of the coal itself realize the dedusting treatment o...

Embodiment 3

[0065] The dedusting process of the pyrolysis gas described in the present embodiment comprises the following steps:

[0066] (1) The raw coal is contacted with a gas with a temperature of 350°C and an oxygen content of 2v% for 40 minutes to obtain dry coal with a particle size of 1-20mm;

[0067] (2) Dry coal enters the moving bed reactor at a constant speed continuously, and flows out of the moving bed reactor at a constant speed from top to bottom, thereby forming a moving bed particle layer in the reaction chamber of the moving bed reactor; and during this process, the temperature is The coal pyrolysis gas at 600°C and the pressure of 500Pa enters the reaction chamber through the bottom of the moving bed reactor and contacts the moving bed granular layer in reverse. The flow rate ratio of the coal pyrolysis gas to the moving bed granular layer is 110:1. The high specific surface area and filtration accuracy realize the dedusting treatment of coal pyrolysis gas, and respect...

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Abstract

The invention provides a process and a device for dust removal for a pyrolysis coal gas, and a combined process and device for dust removal for a pyrolysis coal gas and delayed coking for heavy oil. The process for dust removal for the pyrolysis coal gas comprises the following steps: (1) enabling the pyrolysis coal gas to reversely pass through a moving bed particle layer formed by dry coal to obtain primary dust removal coal gas; and (2) carrying out a secondary dust removal treatment on the primary dust removal coal gas by the heavy oil with fractions with temperature of 350 DEG C or above to obtain dustless coal gas. Compared with the prior art, the process for dust removal disclosed by the invention is simple to operate and low in energy consumption and facilitates large-scale running; in addition, the process for dust removal for the pyrolysis coal gas is perfectly coupled together with delayed coking for heavy oil for the first time, thus greatly simplifying the process flow, reducing the operation difficulty, and reducing the cost investment and the energy consumption of a production device.

Description

technical field [0001] The invention relates to a combined process and device, in particular to a combined process and device for dedusting pyrolysis gas and delayed coking of heavy oil, and belongs to the technical field of coal chemical industry. technical background [0002] my country is a big consumer of petroleum products, but at the same time it is a country poor in petroleum resources. In recent years, due to the continuous increase in demand for petroleum, huge crude oil imports have threatened my country's energy security. However, it is gratifying that my country is relatively rich in coal resources. Therefore, how to realize the efficient and clean conversion of coal to produce oil instead of products has become an important part of the country's "12th Five-Year" energy technology plan, and it is also a guarantee for my country's important measure of energy and national security. [0003] At this stage, the relatively mature technologies for coal treatment includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/02C10K1/18C10K1/20
CPCC10K1/02C10K1/18C10K1/30
Inventor 王守峰山秀丽常景泉贺鑫平吕子胜王淑岩李锦涛李万飞李万善
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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