Clean flue gas circulation system

• Main Authors: CHEN YOUGEN, LI QINWU, LI ZHIBIAO, ZHANG LIN
• Format: Patent
• Language: Chinese; English
• Published: 13.04.2011
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a clean flue gas circulation system consisting of a control system and a circulation flue, wherein the circulation flue is arranged between the outlet end of a draft fan and the inlet end of a desulfuration absorption tower. The clean flue gas circulation system is characterized in that a first airtight baffle door, a throttling device, an air damper and a second airtight baffle door are arranged on the circulation flue in sequence, a gas pressure gear, a gas flowmeter and a gas thermometer are arranged between the second airtight baffle door and the air damper, and the control system receives parameters output by the gas pressure meter, the gas flowmeter and the gas thermometer and outputs a result after comparison and calculation; when the calculation result is equal to or lower than a design threshold value, the two airtight baffle doors are opened manually or automatically or the air damper is adjusted at the same time; and when the calculation result is higher than the design thre