Moving bed pressure varying adsorption gas separation device

Abstract

The invention relates to a moving bed pressure varying adsorption gas separation device which is characterized by comprising an absorption tower and an analyzing tower; the analyzing tower is serially connected with the absorption tower; the absorption tower and the analyzing tower are provided with wind locking machines at feed ports and discharge ports so as to maintain different working pressures required by the absorption tower and the analyzing tower; the wind locking machine at the discharge port of the absorption tower and the wind locking machine at the feed port of the analyzing tower are connected through a lifting device; and during working, adsorbing agents in the absorption tower and the analyzing tower move from top to bottom in a bulk flow manner, and the condition that the adsorbing agents move continuously in the absorption tower and the analyzing tower through the lifting device are recycled is realized. The moving bed pressure varying adsorption gas separation device has the following advantages that the fresh adsorbing agents are continuously moved in and saturated adsorbing agents are continuously moved out in the absorption tower so that charge gas is continuously separated and purified, and the saturated adsorbing agents are also continuously decompressed and / or washed for regeneration in the analyzing tower so as to realize continuous and stable generation of product gas. The device avoids the disadvantage that the conventional pressure swing adsorption gas separation device frequently switches the absorption tower, thereby reducing the energy consumption, increasing the gas production; and simultaneously, the device has the advantages of small adsorbing agent quantity, low investment, and the like.

Description

technical field [0001] The invention is a moving bed pressure swing adsorption gas separation device, which is used in oxygen-enriched combustion or other oxygen-enriched and pure oxygen application industries, and can also be used in other gas separation and purification industries, which belongs to the gas separation and purification, oxygen-enrichment and pure oxygen application technology field. Background technique [0002] At present, there are three main methods for producing oxygen-enriched air: cryogenic method, membrane separation method and pressure swing adsorption method. The principle of the cryogenic method is low-temperature rectification, which compresses, cools, and liquefies air, and uses the difference in boiling points of different gases to carry out rectification to separate nitrogen and oxygen. This method was invented by Professor Linde in 1902. It is a traditional process of large-scale oxygen production and also the main method of large-scale indu...

AI Technical Summary

Problems solved by technology

Due to the need for frequent switching between multiple adsorption towers, the production capacity of the pressure swing adsorption device is limited, the energy consumption increases, the floor area is large, and the system is complex

[0005] At present, most of the kilns use air with an oxygen concentration of 21%, which contains 78% nitrogen that does not participate in combustion, taking away a large amount of combustion heat, reducing the combustion temperature, and improving The important thing is that due to the large amount of combustion air and flue gas, the investment in the kiln system equipment is enlarged. On the other hand, the emission of nitrogen oxides is increased due to the large amount of nitrogen entering the combustion zone, and the emission of sulfur dioxide is also increased due to insufficient oxygen concentration.

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