A screw conveyor is a mechanism that uses a rotating helical blade coiled around a shaft; it provides a variety of solutions for conveying bulk materials such as granular and small block materials horizontally or at an oblique angle, while the pipeline screw conveyor has very high efficiency. Highly cost-effective and can operate with minimal maintenance. Tubular screw conveyors are widely used to transport coal, ash, slag, cement, kitchen waste, wood chips, aggregates, grains, animal feed, boiler ash, meat and bone meal, municipal solid waste, etc.