Efficient enrichment and separation equipment for ultralow-concentration gas

A technology of ultra-low concentration and separation equipment, applied in the field of resources and energy, can solve the problems of wasting energy, polluting the environment, etc., and achieve the effects of improving adsorption efficiency, reducing emissions, and improving economic efficiency

Active Publication Date: 2013-09-25
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0005] The purpose of the present invention is to provide a gas separation and adsorption device with an excess concentration of methane gas below 1%, which solves the problems of wasting energy and polluting the environment in the existing mine exhaust air directly discharged into the atmosphere, and achieves resource utilization The effect of using

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  • Efficient enrichment and separation equipment for ultralow-concentration gas
  • Efficient enrichment and separation equipment for ultralow-concentration gas
  • Efficient enrichment and separation equipment for ultralow-concentration gas

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specific Embodiment 1

[0044] Specific embodiments 1. Adsorption at normal pressure and 25°C, vacuum analysis at 20kPa, gas flow rate of 500sccm, adsorption in the adsorption tower, the ratio of the diameter of the analysis pipe to the total length is 1:4, and the use of 1000m 2 Under the condition that the modified activated carbon per g is used as the adsorbent, the methane concentration of the raw material gas is 0.10%, the methane concentration of the first-stage imported raw material gas is 0.10%, and the concentration of the desorption gas flowing out of the first-stage desorption tower is 2.88%. The concentration of the product gas flowing out of the adsorption tower is 0.02%; the methane concentration of the second-stage imported raw material gas is 2.88%, the concentration of the analytical gas flowing out of the second-stage desorption tower is 17.92%, and the concentration of the product gas flowing out of the second-stage adsorption tower is 0.21% , the second-stage product gas enters th...

specific Embodiment 2

[0045] Specific embodiment 2. Adsorption at normal pressure and 25°C, vacuum analysis at 20kPa, gas flow rate of 500sccm, adsorption in the adsorption tower, the ratio of the diameter of the analysis pipe to the total length is 1:9, and the use of 1000m 2 Under the condition that the modified activated carbon per gram is used as the adsorbent, the methane concentration of the raw material gas is 0.10%, the methane concentration of the first-stage imported raw material gas is 0.10%, and the concentration of the desorption gas flowing out of the first-stage desorption tower is 3.12%. The concentration of the product gas flowing out of the adsorption tower is 0.01%; the methane concentration of the second stage imported raw material gas is 3.12%, the concentration of the analytical gas flowing out of the second stage desorption tower is 19.26%, and the concentration of the product gas flowing out of the second stage adsorption tower is 0.15% , the second-stage product gas enters ...

specific Embodiment 3

[0046] Specific embodiment 3. Adsorption at normal pressure and 25°C, vacuum analysis at a vacuum pressure of 20kPa, gas flow rate of 500sccm, adsorption in the adsorption tower, the ratio of the diameter of the analysis pipe to the total length is 1:12, and the use of 1000m 2 Under the condition that the modified activated carbon per g is used as the adsorbent, the methane concentration of the raw material gas is 0.10%, the methane concentration of the first-stage imported raw material gas is 0.10%, and the concentration of the desorbed gas flowing out of the first-stage desorption tower is 3.02%. The concentration of the product gas flowing out of the adsorption tower is 0.02%; the methane concentration of the second stage imported raw material gas is 3.02%, the concentration of the analytical gas flowing out of the second stage desorption tower is 18.63%, and the concentration of the product gas flowing out of the second stage adsorption tower is 0.19% , the second-stage pr...

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Abstract

The invention provides efficient enrichment and separation equipment for ultralow-concentration gas. The efficient enrichment and separation equipment comprises an air compressor, a mass flow meter, a solenoid valve, an infrared ray gas analyzer, a vacuum pump and an online collection system. The equipment has the advantages that a double-tower adsorption and desorption system is arranged; one tower is used for adsorption while the other tower is used for desorption; room-temperature and normal-pressure absorption, vacuum desorption and reaction conditions are easy to realize and the possibility of industrial large-scale production exists; the ultralow-concentration gas which is lower than 0.5% can be separated and purified and the problem that mine gas which is lower than 0.1% can not be used. The adsorption tower is internally provided with three adsorption pipelines which are connected in series so as to prolong the gas penetration time and improve the adsorption efficiency of an adsorbent; the adsorption tower is internally provided with a buffering region and is connected with a desorption tower through a pipeline so as to reduce the energy consumption of the vacuum pump in the switching work process, and improve the economic efficiency; a multi-grade concentration lifting device can meet different working conditions and can recycle low-concentration methane in product gas so as to further reduce the discharging of the methane.

Description

technical field [0001] The invention discloses a high-efficiency enrichment and separation device for ultra-low concentration gas, which belongs to the field of resources and energy, and mainly includes: an air compressor, a mass flow meter, a solenoid valve, an infrared gas analyzer, a vacuum pump, an online collection system, and the like. Background technique [0002] my country has abundant reserves of coalbed methane resources. Among the reserves of coalbed methane resources with a buried depth of less than 2000m, the recoverable amount is about 36.86 trillion m 3 , but in the process of mining, the methane concentration of coalbed methane is only 20%-45% or even lower due to the mixing of air. The combustion calorific value of coalbed methane with too low concentration is too low and has no economic value for long-distance pipeline transportation . In order to prevent coal mine gas explosions, the past treatment method is to ventilate the mine or carry out gas drainag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047C10L3/10
Inventor 竹涛戴亚中周金兰陆玲周昊李光腾陈莎
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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