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Method for removing CO2 from converted gas of two-stage pressure swing adsorption apparatus having a reclaiming unit

A pressure swing adsorption and recovery device technology, applied in the direction of adsorption, separation methods, chemical instruments and methods, etc., can solve the problem of large loss of effective gas, increase of surrounding environmental pollution and potential safety hazards, and reduction of the total output of synthetic ammonia, urea, and methanol and other problems, to achieve the effect of reducing power consumption, improving evacuation time and vacuum degree

Inactive Publication Date: 2006-02-22
刘明
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Problems solved by technology

[0002] Removal of CO from shift gas by two-stage pressure swing adsorption unit 2 The method, although there are published patent literature reports both at home and abroad, there is the problem of high-pressure venting of the first stage and the second stage pressure swing adsorption device (after the pressure equalization step-down process ends, the pressure in the adsorber will be higher than 0.01MPA. high pressure, the higher the pressure, the greater the effective gas loss), especially the second stage pressure swing adsorption unit, due to the CO in the raw gas 2 The concentration is low, resulting in the effective gas H after the second stage reverse venting. 2 , N 2 , CO loss, resulting in a decrease in the total output of synthetic ammonia, urea, and methanol, and at the same time, the release of this part of flammable, explosive, and toxic gases has increased the pollution of the surrounding environment and hidden safety hazards

Method used

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  • Method for removing CO2 from converted gas of two-stage pressure swing adsorption apparatus having a reclaiming unit
  • Method for removing CO2 from converted gas of two-stage pressure swing adsorption apparatus having a reclaiming unit
  • Method for removing CO2 from converted gas of two-stage pressure swing adsorption apparatus having a reclaiming unit

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Effect test

Embodiment 1

[0072] Removal of CO from synthetic ammonia by a two-stage pressure swing adsorption unit with recovery system 2 The method, which uses synthetic ammonia shift gas as raw material, achieves the removal of CO through two-stage pressure swing adsorption devices. 2 For the purpose, in this example, the first-stage pressure swing adsorption device does not need to purify and recover high-purity CO 2 .

[0073] 1. Implementation steps of the first stage pressure swing adsorption device

[0074] The raw material gas of the first-stage pressure swing adsorption device is the shift gas from the synthetic ammonia system, in which the temperature of the raw material gas is ≤40°C and the working pressure is 0.80MPa. The first-stage pressure swing adsorption device consists of eight adsorption towers and a steam-water separator 1. Two pressure equalizing tanks. The adsorber of this section of the device is equipped with three kinds of adsorbents: activated alumina, activated carbon and ...

Embodiment 2

[0143] Removal of CO from synthetic ammonia by a two-stage pressure swing adsorption unit with recovery system 2 The method, which uses synthetic ammonia shift gas as raw material, achieves the removal of CO through two-stage pressure swing adsorption devices. 2 In this example, the first-stage pressure swing adsorption device needs to purify and recover high-purity 98.5% CO 2 For urea production.

[0144] 1. Implementation steps of the first stage pressure swing adsorption device

[0145] The raw material gas of the first-stage pressure swing adsorption device is the shift gas from the synthetic ammonia system, in which the temperature of the raw material gas is ≤40°C and the working pressure is 2.0MPa. The first-stage pressure swing adsorption device consists of ten adsorption towers and one steam-water separator 1. Two pressure equalizing tanks. The adsorber of this section of the device is equipped with three kinds of adsorbents: activated alumina, activated carbon and f...

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Abstract

The invention discloses a method for degassing carbon dioxide from transformation gas with a two- stage pressure- swing absorption device equipped with a recovery unit, the first pressure- swing absorption device taking no replacing or replacing pressure-swing absorption process according to the aim of recycling and purifying CO2, the second pressure- swing absorption device linking the two pressure- swing absorption devices by the recovery system, deleting the evacuation or wash- off process, improving the recovery ratio of H2, N2, CO, or CO2 and also improving the usage of absorbent.

Description

technical field [0001] The invention relates to a two-stage pressure swing adsorption device with a recovery device for removing CO from shift gas 2 And can simultaneously purify high-purity CO as needed 2 The pressure swing adsorption gas separation technology method is mainly used in the small nitrogen fertilizer or chemical fertilizer industry, and can also be used in other fields with similar gas source requirements. Background technique [0002] Removal of CO from shift gas by two-stage pressure swing adsorption unit 2 The method, although there are published patent literature reports both at home and abroad, there is the problem of high-pressure venting of the first stage and the second stage pressure swing adsorption device (after the pressure equalization step-down process ends, the pressure in the adsorber will be higher than 0.01MPA. high pressure, the higher the pressure, the greater the effective gas loss), especially the second stage pressure swing adsorption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047
CPCY02C10/08Y02C20/40
Inventor 刘明
Owner 刘明
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