Method for screening catalyst for Fischer Tropsch synthesis

A Fischer-Tropsch synthesis and catalyst technology, applied in chemical instruments and methods, separating solids from solids with airflow, solid separation, etc., can solve the problems of catalyst crushing, dust pollution, high labor intensity, etc., and achieve reduction Catalyst loss, reduced environmental pollution, and simple screening operation

Active Publication Date: 2012-07-25
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the sieving technology of catalysts, vibrating sieve machines are generally used for sieving. The operation of vibrating sieve machines is relatively cumbersome. Large, severe dust pollution on site, and the catalyst may be crushed by vibration during the vibration screening process
At the same time, due to the low screening efficiency, it will seriously affect the production capacity of the catalyst production plant. At present, the screening unit has become the short board of the entire Fischer-Tropsch catalyst production process, and this problem must be solved

Method used

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  • Method for screening catalyst for Fischer Tropsch synthesis
  • Method for screening catalyst for Fischer Tropsch synthesis
  • Method for screening catalyst for Fischer Tropsch synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Weigh 5kg from the uniformly mixed Fischer-Tropsch synthesis iron-based catalyst to be screened in the above comparative example 1, coded as C, put it into the catalyst charging barrel, control the compressed gas inlet pressure to 0.5bar, and fully open the air induction Butterfly valve 7, fully open discharge valve 19, the catalyst enters the dispersion tower with the compressed gas and disperses. After the catalyst is sieved, the finished catalyst is collected and weighed, and 50g of the finished catalyst is evenly taken for laser particle size analyzer testing. The obtained results Listed in Table 1.

Embodiment 2

[0082] Weigh 5kg from the Fischer-Tropsch synthesis iron-based catalyst to be screened uniformly mixed in the above comparative example 1, coded as D, put it into the catalyst charging barrel, control the compressed gas inlet pressure to 1.0bar, and fully open the induced wind butterfly valve 7. Fully open the discharge valve 19, and the catalyst enters the dispersion tower with the compressed gas to disperse. After the catalyst is sieved, collect the finished catalyst and weigh it, and evenly take 50g of the finished catalyst for the laser particle size analyzer test. The obtained results are listed in Table 1.

Embodiment 3

[0084] Weigh 5kg from the evenly mixed Fischer-Tropsch synthesis iron-based catalyst to be screened in Comparative Example 1, coded as E, put it into the catalyst charging barrel, control the compressed gas inlet pressure to 0.5bar, and fully open the air induction Butterfly valve 7, half-open discharge valve 19, the catalyst enters the dispersion tower with the compressed gas and disperses, after the catalyst screening is completed, collect the finished catalyst and weigh it, evenly take 50g of the finished catalyst, use a laser particle size analyzer to test, and obtain The results are listed in Table 1.

[0085] Table 1 Catalyst laser particle size analysis results

[0086]

[0087] It can be seen from the data in Table 1 that before the catalyst was screened, the content of the catalyst less than 50 μm accounted for 14.6% of the total amount of the catalyst, and it was reduced to 2.2% after three times of mechanical vibrating screening with a standard sieve. The conten...

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Abstract

The invention provides a method for screening a catalyst for Fischer Tropsch synthesis, which comprises the following steps that: (a) the catalyst to be screened is filled into a charging bucket of a catalyst conveying and dispersing device, enters a dispersing tower through a disperser at the front end of a conveying tube of the catalyst conveying and dispersing device under the drive of compressed gas, and is sprayed and dispersed downward from a small hole of the disperser; (b) sprayed and dispersed catalyst particles fall down under the action of the gravity and the induced air provided by an induced draft fan and part of big particles fall on a cone barrel at the bottom of the dispersing tower; (c) fine powder and part of small particles are sucked away by an induced draft tube and most of small particles directly fall into a product collecting bucket positioned below a cone space of the dispersing tower; and (d) the fine powder and part of small particles, which are obtained in the step (c), enter the induced draft tube and then enter a settling chamber along with the induced air, the small particles settle down at the bottom of the settling chamber under the action of the gravity and slide into the product collecting bucket, and the superfine particles leave from the settling chamber along with the induced air and enter a cyclone separator.

Description

technical field [0001] The invention belongs to the technical field of production of iron-based catalysts used in slurry bed Fischer-Tropsch synthesis, and in particular relates to a screening method for catalysts used in Fischer-Tropsch synthesis. Background technique [0002] Fischer-Tropsch synthesis is the conversion of CO, H 2 It is an effective way to convert the main synthesis gas into chemical raw materials and liquid hydrocarbon products. Among them, the precipitated iron catalyst is suitable for application in the synthesis gas source with lower hydrogen-to-carbon ratio from coal because of its water-gas shift characteristics; my country is rich in coal resources, so precipitated iron catalysts have been more researched and applied. Fischer-Tropsch synthesis is a strong exothermic reaction. To enlarge the reactor and increase production capacity, the problem of heat transfer must be solved; the slurry bed belongs to a gas-liquid-solid three-phase system, and the ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B9/02B07B7/01B07B11/02B07B11/06
Inventor 谢晶贾智刚李铁刚常鸿雁常海程时富王洪学
Owner CHNA ENERGY INVESTMENT CORP LTD
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