Voltage transformation adsorption method for circulation valuable gas

A technology of pressure swing adsorption and gas, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve the problems of not fully considering the gas flow direction and reducing system instability, so as to maintain system stability and improve operation. The effect of the process

Active Publication Date: 2008-08-27
上海穗杉实业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned cycle operation process, the gas flow direction, pressure and the variation of the partial pressure of each component in the cycle step in the adsorption tower that has been recovered are not fully considered, so as to maximize the recovery in the recovery process. Recover the physical components and kinetic energy of valuable gas, and minimize the system instability caused by the airflow impact that is easy to generate during the cycle process
In other words, it does not solve the problem of recovering valuable gas while maximizing the recovery of gas kinetic energy and components, and proposes a solution to the problem of equipment stability and system scalability.

Method used

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  • Voltage transformation adsorption method for circulation valuable gas
  • Voltage transformation adsorption method for circulation valuable gas
  • Voltage transformation adsorption method for circulation valuable gas

Examples

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Comparison scheme
Effect test

Embodiment 1

[0073] This implementation example takes a single adsorption tower as an example Figure 10 The embodiments described in illustrate the invention in more detail:

[0074] In the single adsorption tower, the zeolite molecular sieve adsorbent is used to separate the air into high-purity difficult-to-adsorb oxygen products, and nitrogen gas, which is an easily adsorbable component of the by-product gas, is discharged. After the raw material air passes through the one-way check valve 6, it enters the raw material gas balance tank 1 and mixes with the recovered valuable gas (pressure release gas of the adsorption tower). When the pressure of the raw material gas balance tank 1 increases due to the clearance gas, Feed air will not pass through check valve 6, but when the pressure of the residual air in feed gas balance tank 1 decreases, the air will start to pass through control valve 7 and mix with the remaining residual gas in feed gas balance tank 1, including After the raw mate...

Embodiment 2

[0076] This implementation example takes two adsorption towers as an example Figure 11 The embodiment described in illustrates in more detail the preferred pressure swing adsorption system of a plurality of adsorption towers of the present invention:

[0077] In two parallel adsorption towers, the zeolite molecular sieve adsorbent is used to separate the air into high-purity difficult-to-adsorb oxygen products, and discharge nitrogen as the easily adsorbable component of the by-product gas. After the raw material air passes through the one-way check valve 6, it enters the raw gas balance tank 1 and mixes with the recovered valuable gas (pressure release gas of the adsorption tower). When the pressure in the raw gas balance tank 1 rises due to the clearance gas, The feed air will not pass through the check valve 6, but when the pressure of the clearance air in the feed balance tank 1 decreases, the air will start to pass through the check valve 6 and mix with the remaining cle...

Embodiment 3

[0079] This implementation example takes two adsorption towers as an example Figure 12 The embodiment described in illustrates in more detail the preferred pressure swing adsorption system of a plurality of adsorption towers of the present invention:

[0080] In two parallel adsorption towers, the zeolite molecular sieve adsorbent is used to separate the air into high-purity difficult-to-adsorb oxygen products, and discharge nitrogen as the easily adsorbable component of the by-product gas. After the raw material air passes through the one-way check valve 6, it enters the raw gas balance tank 1 and mixes with the recovered valuable gas (pressure release gas of the adsorption tower). When the pressure in the raw gas balance tank 1 rises due to the clearance gas, Feed air will not pass through check valve 6, but when the pressure of the residual air in feed balance tank 1 decreases, the air will start to pass through valve 6 and mix with the remaining residual gas in feed balan...

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Abstract

The invention belongs to the technology field of separation of gaseous mixture, in particular relates to a pressure swing absorption method for circulating valuable gases. The method comprises the following steps that: at least a primary or a secondary surge tank is arranged in an absorption system; the absorption system is provided with at least one absorption column which can be arranged in a parallel way; at least one absorption column is involved in absorption steps and other absorption columns are involved in out-of-phase operation such as regeneration and so on; valuable gases are circulated and reclaimed to the middle surge tank or a raw gas storage container from the product end of the absorption columns for pressure equalization in grades, thus not only effectively recycling kinetic energy of components and gases which are difficult to be absorbed, reducing the energy consumption and the cost required by power equipment, but also improving the stability of the system. In addition, the system can be expanded infinitely by adopting unsymmetrical operation mode.

Description

technical field [0001] The invention belongs to the technical field of mixed gas separation, and in particular relates to a method for separating a raw material gas mixture through a pressure swing adsorption (PSA, Pressure SwingAdsorption) process, in particular to a pressure swing adsorption method for circulating valuable gas, which can efficiently Realize the separation of mixed gases and obtain one or more high-purity gases. Background technique [0002] As an advanced gas separation technology, the pressure swing adsorption (PSA) method has been successfully applied in the fields of petroleum, chemical industry, electronics, metallurgy, medicine, etc. Extract pure hydrogen from hydrogen-containing mixed gas such as deflated gas and methanol purge gas; separate isobutane and n-butane from liquefied butane gas; extract carbon monoxide from blast furnace exhaust gas; separate oxygen or nitrogen from air, etc. It has a wide range of applications in energy saving, consumpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/053
Inventor 陈宗蓬赵宏炜张元秀
Owner 上海穗杉实业股份有限公司
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