Zero gas consumption PSA air separation nitrogen device

By adopting a multi-layer structure and uniform airflow distribution design in the PSA air separation nitrogen production unit, the problems of poor molecular sieve bed stability and micropore blockage have been solved, achieving efficient operation of the zero-gas-consumption process and long-life adsorbent use.

CN122124594APending Publication Date: 2026-06-02SHANGHAI HUADIAN ELECTRIC POWER DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HUADIAN ELECTRIC POWER DEV CO LTD
Filing Date
2026-03-24
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In existing zero-gas-consumption PSA nitrogen production technology, the molecular sieve bed has poor operational stability and is prone to pulverization and deactivation. Furthermore, the recovered purge gas is prone to carrying impurities, leading to molecular sieve poisoning and micropore blockage, resulting in a decline in adsorption performance.

Method used

The adsorption tower adopts a multi-layer structure, including a support plate, a protective layer, a support layer, a transition layer, an adsorption layer, and a buffer layer. Combined with staggered orifice plates and rectifier plates, it utilizes the design of uniform airflow distribution and reverse purging airflow to prevent molecular sieve particle collision and micropore blockage, thereby improving the regeneration depth.

Benefits of technology

It improves the operational stability of molecular sieves and the effective capacity of adsorbents, extends service life, avoids molecular sieve pulverization and poisoning, and enhances nitrogen recovery rate and energy efficiency.

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Abstract

This invention relates to the field of air separation nitrogen generation technology, and discloses a zero-gas-consumption PSA air separation nitrogen generation device, including a first adsorption tower and a second adsorption tower. A first air inlet pipe is installed on the side of the first adsorption tower, and the first and second adsorption towers are connected through the first air inlet pipe. The internal structures of the first and second adsorption towers are identical, and an air inlet assembly is also installed on the side of the first adsorption tower. This invention utilizes a support plate, protective layer, support layer, transition layer, adsorption layer, and buffer layer arranged sequentially from bottom to top to ensure uniform airflow distribution, avoiding flow deviation and tunneling effects. This suppresses bed fluidization and collision wear of molecular sieve particles, reducing the risk of molecular sieve pulverization and deactivation. Simultaneously, the top clamping plate, under the action of a spring, can adaptively adjust the clamping force according to the pressure changes within the adsorption tower and the slight expansion and contraction of the bed, preventing bed loosening or lifting, further improving the operational stability of the bed.
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