Purification method for pressure swing adsorption decarbonized evacuated gas and purification device thereof

A pressure swing adsorption and purification device technology, which is applied in chemical instruments and methods, separation methods, degassed water/sewage treatment, etc., can solve problems such as hidden dangers in safe operation of equipment, ineffective purification and recovery, and corrosion of peripheral equipment. Achieve the effects of reducing environmental impact, solving backwater quality problems, and purifying the surrounding environment

Inactive Publication Date: 2019-04-09
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the shortage of energy in the world, countries and industries pay more and more attention to the development and utilization of low-grade resources, and countries have higher and higher requirements for environmental governance, making adsorption and separation technology widely used in the steel industry, gas industry, electronics industry, In the petroleum and chemical industry, more and more attention has been paid to it. The major development of adsorbents has laid a technical foundation for the continuous operation of large-scale adsorption and separation processes. Pressure swing adsorption decarburization is used as a gas purification device in the front section of synthetic ammonia production. Gas separation depends on changes in pressure. To achieve adsorption and regeneration, the vacuum pump is used to draw negative pressure to regenerate the adsorbent. During the process of analysis and evacuation, a large amount of venting air (reverse venting and pumping air) will be generated. The venting air contains high concentrations of CO2, H2S, etc. If acid gas is not purified and recovered, it will not only cause environmental impact, but also cause corrosion to peripheral equipment
[0003] The existing reverse venting pipeline of the pressure swing adsorption production device is directly discharged to the sky, which cannot be effectively purified and recycled. The direct venting not only causes the surrounding environmental pollution, but also affects the safe operation of the equipment due to the corrosiveness of the acidic gas in the vented air. There are certain safety hazards; and the reverse deflation and air pumping are not discharged together; and when the existing PSA replaces the activated carbon, it must be vented on site and the vacuum pump returns to the water short circuit, which has a certain impact on the environment. The return water of the vacuum pump is directly discharged back to the circulating water (without gas recovery), which not only has some impact on the surrounding environment of the discharge, but also has some impact on the water quality of the circulating water (the pH value is weakly acidic). Therefore, to solve this category The issue appears to be particularly important

Method used

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  • Purification method for pressure swing adsorption decarbonized evacuated gas and purification device thereof
  • Purification method for pressure swing adsorption decarbonized evacuated gas and purification device thereof

Examples

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Embodiment 1

[0024] Such as figure 1 As shown, the present embodiment provides a method for purifying air by PSA decarburization, comprising the following steps:

[0025] Step 1: After the pressure swing adsorption device absorbs the raw material gas, the gas generated by reverse discharge enters the venting main pipe;

[0026] Step 2: The pressure swing adsorption device absorbs the raw material gas and the gas generated by the evacuation pump enters the vent main pipe;

[0027] Step 3: The evacuation pump adopts the water ring type, and the return water of the vacuum pump contains some CO 2 Waiting for the gas, the gas-liquid separation is carried out through the separator, and the separated gas enters the venting main pipe;

[0028] Step 4: The merged vented air enters the water washing tower, and the demineralized water is sprayed down from the upper part of the water washing tower, and is in reverse contact with the vented air to absorb the residual acid gas in the vented air, and t...

Embodiment 2

[0034] Such as figure 2 As shown, the present embodiment provides an air purification device, which includes a venting main pipe 1, a separator 2, a water washing tower 3 and a desulfurization tank 4, and the pressure swing adsorption device reversely releases the gas generated after absorbing the raw material gas and the variable The pressure adsorption device absorbs the raw material gas and the gas produced by the evacuation pump is respectively introduced into the venting main pipe 1, and the other end of the venting main pipe 1 is connected to the bottom of the water washing tower 3, and the desulfurization tank 4 is provided with pipeline, and a spray head 5 is arranged on the top of the water washing tower 3, and an emptying pipe 6 is arranged on the top of the water washing tower 3 and the desulfurization tank 4, and the return water of the vacuum pump 7 is received by the separator 2 , and the gas after gas-liquid separation is transported to the vent main pipe 1 thr...

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Abstract

The invention discloses a purification method for pressure swing adsorption decarbonized evacuated gas and a purification device thereof. The evacuated gas is purified effectively by adding a washingstep behind an original gas evacuating step, carrying out gas-liquid separation on return water of a vacuum pump, controlling the liquid level of a water seal pipe through a U-shaped bend of a separator, ejecting the evacuated gas after gas-water separation from the top of the separator, feeding the evacuated gas into a post-section washing tower and a desulfurizer successively together, feeding the evacuated gas into a washing tower to be washed and purified and adsorbing and purifying acidic gas such as H2S in the evacuated gas by activated carbon, so that the environmental influence is reduced.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a pressure swing adsorption decarburization air purification method and a purification device thereof. Background technique [0002] With the shortage of energy in the world, countries and industries pay more and more attention to the development and utilization of low-grade resources, and countries have higher and higher requirements for environmental governance, making adsorption and separation technology widely used in the steel industry, gas industry, electronics industry, In the petroleum and chemical industry, more and more attention has been paid to it. The major development of adsorbents has laid a technical foundation for the continuous operation of large-scale adsorption and separation processes. Pressure swing adsorption decarburization is used as a gas purification device in the front section of synthetic ammonia production. Gas separation depends on changes in press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/14B01D53/18C02F1/20
CPCB01D53/04B01D53/1456B01D53/18B01D2253/102B01D2257/304C02F1/20
Inventor 孙彩军韩勇娄玉军
Owner ANHUI JINGHE IND
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