Device and method for circularly capturing carbon dioxide in pyrolysis gas by calcium chain

• Main Authors: SUN YONG, TANG YUTING, MA XIAOQIAN, DING SICHUN, CHEN XIAOBIN, KE CHUNCHENG
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2020
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a device and a method for circularly capturing carbon dioxide in pyrolysis gas through a calcium chain. The pyrolysis gas enters the device, a carbon dioxide concentration sensor measures the concentration of the pyrolysis gas, the amount of calcium oxide conveyed into a carbonation reactor is controlled, the calcium oxide captures carbon dioxide in the carbonation reactor,the product calcium carbonate is conveyed into a calcination reactor, and the calcium oxide generated in the calcination reactor is conveyed back to a calcium oxide store, so that the purpose of circularly capturing the carbon dioxide by the calcium chain is achieved. When the concentration of carbon dioxide in the carbonation reactor is slowly reduced, a valve at a waste outlet is opened, and invalid calcium oxide is discharged. When the storage amount of calcium oxide in the calcium oxide store is lower than 50%, a valve at a fresh material inlet is opened, and the calcium oxide store is fully filled with calcium o