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Temperature-pressure synergy adsorption separation purification method for gases

A technology of gas adsorption and purification method, which is applied in the field of temperature-pressure collaborative gas adsorption separation and purification, coal mine drainage of low-concentration gas and ventilation gas adsorption, separation and purification, which can solve problems such as difficult and effective separation, and achieve high energy consumption, Improved adsorption and separation efficiency and simple operation

Pending Publication Date: 2019-04-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main components in low-concentration coal mine gas and ventilation gas include methane, nitrogen, oxygen and other components. Among them, methane and nitrogen have similar physical and chemical structure characteristics, but it is difficult to effectively separate them by conventional pressure swing adsorption technology. Temperature and pressure combined gas adsorption separation and purification method for difficult-to-separate gas components

Method used

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  • Temperature-pressure synergy adsorption separation purification method for gases
  • Temperature-pressure synergy adsorption separation purification method for gases
  • Temperature-pressure synergy adsorption separation purification method for gases

Examples

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Embodiment 1

[0026] In this embodiment, the gas to be separated is methane / nitrogen mixed feed gas (methane concentration is lower than 30%). use as figure 1 The temperature-swing-pressure-swing adsorption system shown, the system includes an air intake unit 1, an exhaust unit 8, and two parallel adsorption towers I4 and adsorption tower II6. The interior of the adsorption tower I4 is provided with a heat exchanger I5, and the interior of the adsorption tower II6 is provided with There is a heat exchanger II7, and both the heat exchanger I5 and the heat exchanger II7 are serpentine tube heat exchangers. Adsorption tower I4 is filled with activated carbon adsorbent, and adsorption tower II6 is filled with molecular sieve adsorbent.

[0027] Purification steps are as follows:

[0028] (1) After the mixed raw material gas is pressurized by the air compressor 2 through the air inlet unit 1, it first enters the cold dryer 3 to remove moisture, and then enters the adsorption tower I4, and the ...

Embodiment 2

[0033] In this embodiment, the gas to be separated is methane / nitrogen mixed feed gas (methane concentration is lower than 30%). use as figure 1The temperature-swing-pressure-swing adsorption system shown, the system includes an air intake unit 1, an exhaust unit 8, and two parallel adsorption towers I4 and adsorption tower II6. The interior of the adsorption tower I4 is provided with a heat exchanger I5, and the interior of the adsorption tower II6 is provided with There is a heat exchanger II7, and both the heat exchanger I5 and the heat exchanger II7 are serpentine tube heat exchangers. Adsorption tower I4 is filled with molecular sieve adsorbent, and adsorption tower II6 is filled with metal organic framework material adsorbent.

[0034] Purification steps are as follows:

[0035] (1) After the mixed raw material gas is pressurized by the air compressor 2 through the air inlet unit 1, it first enters the cold dryer 3 to remove moisture, and then enters the adsorption tow...

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Abstract

The invention discloses a temperature-pressure synergy adsorption separation purification method for gases. Through a plurality of modes of temperature-pressure synergy circulation among different working conditions such as a high-temperature low-pressure adsorption point, a low-temperature low-pressure adsorption point, a low-temperature high-pressure adsorption point and a high-temperature high-pressure adsorption point, efficiency of separating gases by traditional pressure swing adsorption is improved. The method disclosed in the invention solves the problems of higher energy consumption,a lower product yield and insufficient utilization of system energy in the process of purifying and preparing the gases by the pressure swing adsorption, especially solves the condition that a mixed gas contains components difficult to separate, such as methane and nitrogen, and is especially suitable for comprehensive utilization of low-concentration gas and ventilation gas in coal mining.

Description

technical field [0001] The invention relates to the technical field of gas purification, in particular to a temperature-pressure coordinated gas adsorption separation and purification method, which is especially suitable for adsorption, separation and purification of low-concentration gas in coal mine drainage and ventilation gas. Background technique [0002] Gas is an associated product of coal, a valuable non-renewable energy source, and a strong greenhouse gas. In terms of coal mine gas emissions, ventilation gas emissions account for about 70% of the total coal mine gas emissions. Due to the low concentration of ventilation gas (≤1%) and large flow fluctuations, it is difficult to use it directly. Therefore, how to realize the effective utilization of coal mine drainage gas and ventilation gas is of great significance for improving the safe and efficient production level of coal mines and reducing greenhouse gas emissions. [0003] For mixed gases such as coal mine ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01D53/04B01D53/047
CPCB01D53/0462B01D53/047B01D2257/7025B01D2259/40013B01D2259/40028B01D2259/402C10L3/10C10L3/106Y02C20/20
Inventor 李庆钊郑苑楠林柏泉
Owner CHINA UNIV OF MINING & TECH
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