THE NOZZLE FOR WASHING SURFACE OF FILTER-BED IN THE FILTRATION PLANT

摘要

A nozzle for washing the surface of a filter basin in a purification plant is provided to operate filter basin efficiently and to improve workability with low expenses of raw materials. A nozzle for washing the surface of a filter basin in a purification plant includes a main body, an inlet, and an outlet. A plurality of jets are formed on the outlet. A rotatable impeller(120) is installed on the inside the outlet. An inclined surface(121) is formed on the top of the impeller. Three spiral vanes(122) are formed form the inclined surface to the bottom of the impeller with the same interval. The center part of the inclined surface is protruded and formed to the predetermined height. The spiral vanes are curved to a twist angle of 145~155° based on a rotary shaft. A spiral groove(123) is formed between the spiral vanes according to the inclined surface.