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Dedusting agent as well as process and device for coal pyrolysis gas dedusting with dedusting agent

A technology for coal pyrolysis and dust removal agent, applied in the field of coal chemical industry, can solve the problems of easy blockage of pipelines and high cost, and achieve the effects of reducing processing difficulty, reducing cost input, and high specific surface area

Inactive Publication Date: 2015-07-22
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention solves the problem that the gas purification process in the prior art is easy to block due to dust deposition and high-temperature coking, and needs to use a special solid purification agent and a ceramic high-temperature filter unit, resulting in high cost; furthermore, it provides a Coal pyrolysis gas dedusting process and device with good dedusting effect, reducing coking of heavy components in gas, and without using special purifying agent

Method used

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  • Dedusting agent as well as process and device for coal pyrolysis gas dedusting with dedusting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The dedusting process of the coal pyrolysis gas described in the present embodiment comprises the following steps:

[0045] (1) The raw coal is contacted with a gas whose temperature is 150° C. and whose oxygen content is 5v% for 70 minutes to obtain dry coal with a particle size of 10-30 mm;

[0046] (2) Dried coal enters the moving bed reactor continuously at a constant speed, 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 accounting for 1 / 3 of the height of the reaction chamber; And in this process, the coal pyrolysis gas enters the reaction chamber through the bottom of the moving bed reactor and contacts with the particle layer of the moving bed in reverse, and the dust removal treatment of the coal pyrolysis gas is realized by using the high specific surface area and filtration accuracy of the dry coal itself, and the obtained Dust-free ga...

Embodiment 2

[0048] The dedusting process of the coal pyrolysis gas described in the present embodiment comprises the following steps:

[0049] (1) The raw coal is contacted with a gas whose temperature is 200° C. and whose oxygen content is 2v% for 50 minutes to obtain dry coal with a particle size of 0.2-5 mm;

[0050] (2) Dried coal enters the moving bed reactor continuously at a uniform speed, 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 that accounts for 1 / 2 of the height of the reaction chamber; And in this process, the coal pyrolysis gas enters the reaction chamber through the bottom of the moving bed reactor and contacts with the moving bed granular layer in reverse. High specific surface area and filtration accuracy realize dust removal treatment of coal pyrolysis gas and obtain dust-free gas;

[0051] (3) The dust-free gas is cooled and washed by circu...

Embodiment 3

[0053] The dedusting process of the coal pyrolysis gas described in the present embodiment comprises the following steps:

[0054] (1) The raw coal is contacted with a gas whose temperature is 250° C. and whose oxygen content is 1v% for 40 minutes to obtain dry coal with a particle size of 1-10 mm;

[0055] (2) Dried coal enters the moving bed reactor continuously at a constant speed, 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 accounting for 1 / 3 of the height of the reaction chamber; And in this process, the coal pyrolysis gas enters the reaction chamber through the bottom of the moving bed reactor and contacts with the moving bed granular layer in reverse. High specific surface area and filtration accuracy realize dust removal treatment of coal pyrolysis gas, and obtain dust-free gas and dust-containing dry coal respectively;

[0056] (3) Pyrolyz...

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Abstract

The invention provides a dedusting agent as well as a process and a device for coal pyrolysis gas dedusting with the dedusting agent. The process comprises the step that coal pyrolysis gas is reversely pushed through a moving bed granular layer defined by dry coal for dedusting treatment, so that dustless coal gas is obtained. In the process, dry coal is directly used as the dedusting agent to fulfill the dedusting and cooling purposes for the first time; compared with the prior art, the process has the advantages that colloids, asphaltenes, heavy components and dust in the coal pyrolysis gas can be retained without a special solid dedusting agent and a ceramic high-temperature filter unit, so that efficient dedusting of the coal pyrolysis gas can be realized; the dry coal is further used as a coolant for heat exchange of the coal pyrolysis gas, so that not only can the possibility of pipeline blocking caused by high-temperature coking of the heavy components be lowered, but also the energy consumption required for cooling of the coal pyrolysis gas can be reduced. Therefore, the energy consumption and the cost are low.

Description

technical field [0001] The invention relates to a dedusting agent, in particular to a process and a device for dedusting coal pyrolysis gas by using the dedusting agent, and belongs to the technical field of coal chemical industry. technical background [0002] my country is a country short of oil and gas, and relatively rich in coal resources. Coal accounts for more than 65% of primary energy. At present, my country's coal production and total consumption rank first in the world, and coal production is still rising year by year, and most of my country's electricity depends on the supply of coal-fired power plants. As a result, my country is facing the dual pressure of energy supply security and environmental protection at this stage. Therefore, research and development of clean coal technology is urgent. [0003] So far, many domestic enterprises and institutions are committed to promoting the industrialization process of coal pyrolysis upgrading technology, and have achiev...

Claims

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Application Information

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IPC IPC(8): B01D39/06B01J20/20C10K1/02C10K1/32C10K1/10C10K1/04C10B53/04C10B57/00
CPCY02P20/10Y02P20/50
Inventor 王守峰贺鑫平李锦涛侯程李万飞吕子胜王淑岩常景泉吴莹莹
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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