External bed structure of circulating fluidized bed boiler for burning solid wastes

• Main Authors: LU XIAOYAN, QIN WEIDONG, 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 external bed structure of a circulating fluidized bed boiler for burning solid wastes, which can effectively prevent corrosion and abrasion of a heating surface in an external bed, improve the pressure fluctuation resistance of a hearth caused by feeding quantity fluctuation, realize stable circulation and ensure the boiler efficiency. Comprising an upper sealing material returning box and a lower external bed, a heating surface is arranged in the lower external bed, the upper sealing material returning box is connected with the lower external bed through a material returning box outlet pipe and an ash conveying pipeline, a U-shaped cavity is formed in the upper sealing material returning box, a first air distribution plate with a first air cap is installed at the bottom of the U-shaped cavity, and a second air distribution plate with a second air cap is installed at the bottom of the U-shaped cavity. An ope