Air distribution structure for preventing flue gas of feeding system from flowing backwards

• Main Authors: QIN WEIDONG, DING QIFENG, LU ZHAODAN
• Format: Patent
• Language: Chinese; English
• Published: 06.01.2023
• Subjects: AIR; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN; WEAPONS

The invention relates to the technical field of circulating fluidized bed boilers, in particular to an air distribution structure for preventing flue gas of a feeding system from flowing backwards, which can effectively prevent flue gas from flowing backwards, is stable in pressure in a boiler and ensures the efficiency and the structural stability of the boiler, and comprises a feeding pipe connected with a hearth feeding port, and the feeding pipe comprises a vertical blanking pipe and an inclined feeding pipe; the inclined feeding pipe is connected with a feeding air pipe and located behind the vertical discharging pipe, a negative pressure structure is arranged on the inclined feeding pipe and comprises an inner sleeve, an outlet cylinder and an outer sleeve, the inner sleeve is located in the outlet cylinder, the upper end of the inner sleeve is partially exposed out of the outlet cylinder, and a gap is reserved between the outer wall of the inner sleeve and the inner wall of the outlet cylinder to form