Rotary valve based on methane pressure swing adsorption and adsorption method rotary valve

Abstract

The invention relates to a rotary valve based on methane pressure swing adsorption and an adsorption method of the rotary valve. The rotary valve comprises an upper valve, a lower valve and a support frame for fixing the rotary valve; the upper valve comprises an upper valve element, a finished product gas exhaust hole, a finished product gas exhaust groove, a first even-drop hole, a second even-drop hole, a third even-drop hole, a first low-pressure constant-pressure hole, a high-pressure constant-pressure hole, a first even-rise hole, a second even-rise hole, a third even-rise hole and a second low-pressure constant-pressure hole. The lower valve comprises a lower valve core, a product gas inlet hole, a product gas inlet groove, a desorption groove, a vacuum groove, an upper ring groove, a lower ring groove and a sealing ring. A speed reducer is arranged between the upper valve and the lower valve. According to the speed reducer, a power input shaft is coaxially connected with a driving motor, a power output shaft extends upwards and downwards to be provided with a coaxial main rotating shaft, and the upper end and the lower end of the main rotating shaft are provided with an upper connecting shaft and a lower connecting shaft. According to the rotary valve based on methane pressure swing adsorption and the adsorption method of the rotary valve, the opening and closing functions of multiple valves are integrated, the control process is simple, and the use amount of finished gas in the desorption process is reduced.

Description

technical field [0001] The invention relates to the technical field of gas high-pressure purification, in particular to a rotary valve based on biogas pressure swing adsorption and an adsorption method thereof. Background technique [0002] Biogas is a mixed gas produced by microbial fermentation of organic matter under certain conditions. Methane (CH4) is the main component of biogas (50%-80%), others also include: carbon dioxide (CO 2 , 20%-40%), nitrogen (N 2 , 0%-5%), hydrogen (H 2 , <1%), oxygen (O 2 , <0.4%), hydrogen sulfide (H 2 S, <0.1%-3%), etc. Among them, methane (CH4) is an ideal gas fuel, which is colorless and odorless, and will burn when mixed with an appropriate amount of air; hydrogen sulfide (H 2 S) Make the biogas slightly smelly. Therefore, the properties of biogas are similar to natural gas. [0003] Currently, biogas purification methods include: absorption method, pressure swing adsorption method, low temperature condensation method, ...

AI Technical Summary

Problems solved by technology

[0004] 1. There are many valves and many fault points;

[0005] 2. The control process is complicated;

[0006] 3. The product gas consumption in the desorption process is large, and the economy is poor

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