Method for recovering fine catalyst powder to repelletize

A catalyst and fine powder technology, which is applied in the coal chemical industry to reduce dust emission and cost.

Active Publication Date: 2014-03-05
CHINA TIANCHEN ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of catalyst recovery in terms of investment and energy consum

Method used

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  • Method for recovering fine catalyst powder to repelletize

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Embodiment Construction

[0027] Attached below figure 1 The present invention is described further:

[0028] In alcohol ether to olefins fluidized bed system (see figure 1 ) to achieve the following process:

[0029] (1) Fill the alcohol ether to olefin catalyst with a certain abrasion strength in the reaction regeneration fluidized bed system. Perform cyclic reaction regeneration process;

[0030] (2) Alcohol ether to olefin catalyst is in contact with alcohol ether in the reactor to catalyze the conversion of alcohol ether into olefin products; the catalyst continuously rubs against other catalyst particles, walls and flowing gas for a long time. As the reaction time increases, the wear strength of the catalyst decreases, which leads to the catalyst being broken into smaller particles and a large amount of fine powder; the smaller particles return to the fluidized system for reaction through the action of the three-stage cyclone Regeneration, but a large amount of fine powder cannot be discharge...

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Abstract

The invention relates to a method for recovering fine catalyst powder to repelletize. The method is applicable to an alcohol ether-to-olefin fluidized bed system. The method comprises the following steps: collecting the fine catalyst powder from the alcohol ether-to-olefin fluidized bed system by a dust remover inside a fluidized bed reaction system; directly feeding the collected fine catalyst powder to the catalyst pelletizing process; mixing with a fresh catalyst raw material according to any ratio, so as to replace a part of raw materials for pelletizing an alcohol ether-to-olefin catalyst. According to the method disclosed by the invention, the alcohol ether-to-olefin catalyst is recovered by the dust remover after being worn out and broken into a lot of fine powder, and applied to the pelletizing process of a new batch of catalyst. A part of pelletizing material is replaced under the condition of not affecting the performance index of the newly pelletized alcohol ether-to-olefin fluidized bed catalyst, so that dust emission is reduced, the pelletizing raw material cost is reduced, and a part of expenses are saved while the alcohol ether-to-olefin catalyst is friendly to the environment.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a method for recovering catalyst fine powder for regranulation. Background technique [0002] The wear resistance of the catalyst is one of the key indicators of whether the catalyst can be applied industrially. Because the catalyst in the fluidized bed circulates repeatedly in the reactor and the regenerator for a long time, there are very violent friction between the catalyst particles and the catalyst particles, between the catalyst particles and the reactor wall, and between the catalyst and the flowing air. Therefore, after the catalyst in the fluidized bed is fluidized for a long time, its wear resistance will continue to decrease, and eventually the catalyst will be broken into small particles and a large amount of fine powder. [0003] In the past, in industrial production, a large amount of fine powder produced was directly discharged into the atmosphere,...

Claims

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Application Information

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IPC IPC(8): B01J38/72C07C1/20C07C11/04C07C11/06
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 刘俊生耿玉侠马国栋钱震王海国石华左宜赞孔令海李强张蒙张舜光陈晨史文涛王亮李玉龙王兵杨光裴艳红
Owner CHINA TIANCHEN ENG
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