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Separation system for CO2 removal from syngas/natural gas

A separation system and synthesis gas technology, applied in separation methods, dispersed particle separation, combustible gas purification/reconstruction, etc., can solve the problems of poor separation effect, huge equipment, and high energy consumption, and achieve stable dust removal, long operation cycle, separation Efficient effect

Active Publication Date: 2018-08-21
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has huge equipment, high energy consumption, and poor separation effect, so the cost is high. Generally, it is not widely used. It is only used in special cases or combined with other methods.

Method used

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  • Separation system for CO2 removal from syngas/natural gas
  • Separation system for CO2 removal from syngas/natural gas
  • Separation system for CO2 removal from syngas/natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Composition is 50% CH 4 , 50% CO 2 10000kmol / h contains CO 2 The natural gas contains 1% dust. After first passing through the plate and frame PTFE membrane dust collector, the dust removal efficiency can reach 98%. The gas has a two-stage membrane area of ​​2m 2 Under the separation effect of the membrane module, when the reflux ratio is 0, the flow rate of retentate phase 6 is 4100 kmol / h, CO 2 The composition drops to 17%. When the reflux ratio is 1, the retentate phase 6 flow rate is 2945 kmol / h, CO 2 Composition drops to 13%.

Embodiment 2

[0037] Composition is 5% CH 4 , 30%CO, 30%H 2 and 35% CO 2 The 10000kmol / h synthesis gas contains 1% dust, firstly through the plate and frame PTFE membrane dust collector, the dust removal rate is 98%, and the gas has a two-stage membrane area of ​​2m 2 Under the separation effect of the membrane module, when the reflux ratio is 0, the flow rate of the retentate phase 6 is 5339 kmol / h, and the gas composition is 6.34% CH 4 , 46.24% CO, 38.06% H 2 , 9.4% CO 2 , when the reflux ratio is 1, the retentate phase 6 flow rate is 4159 kmol / h, and the gas composition is 6.15% CH 4 , 50.43% CO, 36.94% H 2 , 6.46% CO 2 .

[0038] Compared with the currently used membrane separation device, the separation system of the present invention adds PTFE microporous membrane dedusting equipment at the front end of the gas separation unit, so that it can effectively avoid the pollution of a large amount of dust in natural gas and syngas to its gas separation system; At the same time, the ...

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Abstract

The invention provides a separating system for removing CO2 from synthesis gas / natural gas. The separating system comprises a dust removing unit, a gas separating unit and a gas reflowing unit; the dust removing unit is connected with the gas separating unit; the gas reflowing unit is connected with the gas separating unit by an end-to-end manner so as to forma gas circulating channel. The separating system has the advantages that a PTFE (Polytetrafluoroethylene) microporous membrane dust removal device is additionally arranged at the front end of the gas separating unit, so as to prevent the gas separating system from being polluted by a lot of dust in the natural gas and the synthesis gas; meanwhile, a two-stage separating system and the gas circulating reflowing channel are utilized, thus the concentration of Co2 in the gas can be conditioned by controlling the gas reflowing ratio, and as a result, different production requirements can be met.

Description

technical field [0001] The present invention relates to the removal of CO from gases 2 Separation systems, especially related to the removal of CO from syngas / natural gas 2 separation system Background technique [0002] Currently, CO 2 Greenhouse gas emissions, represented by greenhouse gas emissions, have become a very serious environmental problem. As of 2010, greenhouse gas emissions have caused global temperatures to rise by 1.4 to 5.8°C. However, natural gas and syngas contain large amounts of CO 2 Not only will it greatly reduce its calorific value, thereby reducing the quality of gas; it will also increase the volume of reaction and separation equipment and increase power and heat consumption in chemical production. Therefore, in chemical production, the removal of CO from these gases 2 is of great significance. [0003] CO removal 2 The methods mainly include: solvent absorption method, pressure swing adsorption method, cryogenic distillation method and memb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10C10K1/02C10K1/22B01D53/22B01D46/54
CPCY02C20/40Y02P20/151
Inventor 吴道洪王其成
Owner SHENWU TECH GRP CO LTD
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