(1), primary venturi (single venturi dust collector): the primary venturi adopts manually adjustable throat venturi. In order to cool converter smoke and fireworks, coarse dust removal was carried out, and the opening of throat baffle was manually adjusted during debugging, and the resistance loss was controlled at about 2500Pa, and then the throat was fixed for use. When in use, the actual gas velocity is adjusted to 60-70 m/s. In this paper, the water for dust removal is divided into splash plate water supply and overflow water supply.

(2) Two-stage Venturi (two-stage dust collector): The second-stage Venturi adopts R-D throat, and the throat of Venturi is provided with an oval baffle. Through the micro differential pressure device of the furnace mouth, the change of the furnace mouth pressure and the signal of the change of the furnace mouth pressure are detected, and the opening of the furnace is adjusted by rotating the baffle plate by the hydraulic actuator, so that the Venturi tube can adapt to the change of flue gas quantity, and the airflow can pass through the throat at high speed to achieve accuracy.

One article refers to overflow venturi tube, and the other refers to venturi tube with adjustable throat, which is mainly used for wet dust removal of high temperature flue gas, especially converter.