Performance analysis and optimal modification for scraper chain conveyor of industrial pulverized coal boiler

In order to solve the disadvantages of inefficiency, unstable running and easy damage of scraper chain conveyor of an industrial pulverized coal boiler, structural defects of the scraper chain conveyor were analyzed. The pin and the scraper were the stiffness weaknesses of the scraper chain conveyor. The loads that can be endured by pin and scraper were 2.66×104 N and 2.93×104 N respectively by using the method of combining theoretical calculation and finite element simulation. Structure of the scraper chain conveyor was optimized by modifying the original single-chain structure into double-chain structure, as well as modifying the original bilateral scrapers into a whole piece in the middle. The loads that can be endured by the optimized pin and scraper were 3.24 and 2.34 times of the original structure. The optimized scraper chain conveyor had advantages of high efficiency and stability, and no damage occurred after long time running. The optimized scraper chain conveyor effectively guaranteed the safe and stable production of the industrial pulverized coal boiler.