SYSTEM AND METHOD FOR PREPARING NITROGEN FROM WASTE GAS OBTAINED BY RECOVERING CO2 VIA CHEMICAL METHOD

WIPO Patent Application WO/2023/066134

A1

The present invention belongs to the technical field of nitrogen recovery and utilization, and specifically relates to a system and method for preparing nitrogen from waste gas obtained by recovering CO2 via a chemical method. The system comprises a rough treatment device, a deep purification device and a nitrogen concentration device, wherein the deep purification device comprises a compressor, a deep water removal device and a second filter which are connected in sequence, and an air inlet of the compressor is connected to an air outlet of the rough treatment device; and the nitrogen concentration device comprises an absorption tower, and an air inlet of the absorption tower is connected to an air outlet of the second filter. The system can treat waste gas obtained after CO2 is recovered by means of a chemical method so as to prepare nitrogen, such that not only can high-content nitrogen in vent gas (waste gas obtained after CO2 is recovered by means of a chemical method) be recovered, but the pressure of the vent gas can also be recovered, generating an obvious energy-saving effect.

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LI YUXUE (CN)
QI LI (CN)

PCT/CN2022/125136

April 27, 2023

October 13, 2022

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BEIJING CARBON CYCLE TECH (CN)

C01B21/04

CN113998677A	2022-02-01
CN113975950A	2022-01-28
CN105413429A	2016-03-23
CN101417200A	2009-04-29
CN110498416A	2019-11-26
CN105864798A	2016-08-17
CN109289440A	2019-02-01
CN107899376A	2018-04-13

BEIJING FINELAND IP FIRM (CN)

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