Jet throwers of buik materlais. Calculation method

Jet pumps - hydraulic elevators are widely used in pressure hydraulic systems of bulk materials (pulp). To date, methods have been developed for calculating and designing jet pumps for hydraulic transport systems, based on the non-extreme characteristics of the apparatus and the parameters of the optimal pulp flow in the pipeline. In place of that, with a relatively short range of product transport, for example, when laying the finished product in dumps after the sorting plant with the hydromechanical method of developing the field, the jet pump can be used as a hydrometer. The latter creates a high-speed jet of slurry, sufficient to deliver the pulp to the dump through the air at a given distance. The velocity head of the slurry at the outlet of the hydrometer is determined, on the one hand, by the range of the pulp and the density of the slurry, and on the other hand, by the coefficient of ejection of the apparatus, nozzle area, flow rate and pressure of the active stream. In this case, the same range of pulp delivery can be provided with several operating and geometric parameters of the hydrometer. Optimum is a hydrometer that provides a given supply of solid product and its range increases at the lowest consumption of water and energy. However, it was not possible to find methods for calculating the pulp jet pump-hydrometer.