Temperature and pressure synergistic gas adsorption, separation and purification system

Abstract

The invention discloses a temperature and pressure synergistic gas adsorption, separation and purification system which comprises a gas inlet unit, a gas exhaust unit, an adsorption and separation unit and a temperature control unit. The adsorption and separation unit comprises an air compressor I, a vacuum pump, an adsorption tower I and an adsorption tower II, the gas inlet unit is communicatedwith gas inlets in the bottoms of the adsorption tower I and the adsorption tower II via the air compressor I, gas outlets in the tops of the adsorption tower I and the adsorption tower II are communicated with the gas exhaust unit, gas return openings in the bottoms of the adsorption tower I and the adsorption tower II are communicated with the vacuum pump, the temperature control unit comprisesa heat exchanger I, a heat exchanger II and a cold and heat exchange device, the heat exchanger I is arranged inside the adsorption tower I, the heat exchanger II is arranged inside the adsorption tower II, and the cold and heat exchange device is connected with the heat exchanger I and the heat exchanger II. The temperature and pressure synergistic gas adsorption, separation and purification system has the advantages that the temperature and pressure synergistic gas adsorption, separation and purification system is easy and convenient to operate, and the problems of high energy consumption ofseparation procedures in existing gas pressure swing adsorption and purification procedures, low yield of products, incapability of sufficiently utilizing energy of systems and the like can be solvedby the aid of the temperature and pressure synergistic gas adsorption, separation and purification system.

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 system, which is especially suitable for the 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 min...

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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-pressure collaborative gas adsorption separation and purification device system for difficult-to-separate gas components

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