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A dust filtering method for a mixture of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances

A technology of dust filtration and water vapor, which is applied in the direction of membrane filter, separation method, and dispersed particle filtration, etc. It can solve the problems of inaccurate temperature control of regeneration gas, insufficient contact of filter mechanism, incomplete reaction of regeneration gas, etc., to achieve filtration High efficiency and regeneration efficiency, fast regeneration rate, and high temperature effect

Active Publication Date: 2017-11-21
HEBEI LONGCHENG COAL COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these patents do not fully utilize heat, wasting a lot of waste heat, and the temperature control of the regeneration gas is not accurate enough, and the contact with the filter mechanism is not sufficient, so that the carbon-containing easy precipitates do not react completely with the regeneration gas.

Method used

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  • A dust filtering method for a mixture of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances
  • A dust filtering method for a mixture of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances

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Embodiment 1

[0023] see figure 1 , the filtering system adopted by the filtering method of the present invention comprises a plurality of parallel airtight separation chambers 1, the airtight separation chamber 1 communicates with the intake main pipe 3 through the intake branch pipe 2, and communicates with the exhaust main pipe 5 through the exhaust branch pipe 4, so that The inlet branch pipe 2 and the exhaust branch pipe 4 are respectively provided with a valve 6, and the airtight separation chamber 1 is provided with a filter mechanism 7 and a regeneration gas inlet 8, and the filter mechanism 7 is a plurality of parallel concave arc filters. The net is sunken toward the filter system air intake main pipe 3, and the regeneration gas is passed into the airtight separation chamber 1 through the regeneration gas inlet 8.

[0024] A dust filtering method for a mixture of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances, comprising the following s...

Embodiment 2

[0031] The filtration method in this embodiment is similar to the filtration method in Embodiment 1, and the same parts will not be repeated. Some differences are: the regeneration gas is preheated to 460°C.

Embodiment 3

[0033] The filtration method in this embodiment is similar to the filtration method in Embodiment 1, and the same parts will not be repeated, except that the regeneration gas is preheated to 440°C.

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Abstract

The invention discloses a dust filtering method for the mixed gas of high-temperature oil gas, water vapor and carbon-containing easily precipitated substances. Under the action of the mechanism, it is separated from the mixed gas, and at the same time, the carbon-containing easy precipitates are precipitated from the mixed gas, blocking the pores in the filter mechanism, and making the filter cake thicker and thicker. When the precipitates block the filter mechanism and cannot work normally, Disconnect the high-temperature mixed gas from the closed separation chamber, and pass it into another preheated closed separation chamber to ensure the uninterrupted filtering process; The material on the surface of the filter mechanism and in the pores reacts slowly with the regeneration gas at high temperature, and the product is discharged out of the closed separation chamber, and finally the regeneration of the filter mechanism is realized. Regeneration and filtration are carried out alternately to ensure uninterrupted separation process, high filtration efficiency and regeneration efficiency.

Description

technical field [0001] The invention belongs to the technical field of gas dust removal, in particular to a dust filtering method for a mixed gas of high-temperature oil gas, water vapor, and carbon-containing easily precipitated substances. Background technique [0002] In the chemical, petroleum, metallurgical and other industries, high-temperature dust-containing gases are often produced, especially in the process of pyrolyzing low-rank coal to generate coal tar gas and decomposing gas to improve coal quality. The content of pulverized coal is very high, and the carbon-containing substances easily precipitated in the mixed gas, such as tar, asphalt-like substances, and coal ash attachments, can only exist in a gaseous state in a high-temperature environment. Once the temperature is too low or the environment changes, it will It is easy to slowly precipitate out from the mixed gas. Carbon-containing substances that are easy to precipitate, such as tar coke, asphalt-like s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/12
CPCB01D46/103B01D46/12B01D2267/30B01D46/80B01D46/56
Inventor 朱书成
Owner HEBEI LONGCHENG COAL COMPREHENSIVE UTILIZATION CO LTD