ПІДВИЩЕННЯ ЕНЕРГОЕФЕКТИВНОСТІ ШАХТНИХ ДІЛЬНИЧНИХ ВОДОВІДЛИВНИХ УСТАНОВОК НА СТАДІЇ РОЗРАХУНКУ

Abstract

Drainage plants consume more than 30% of the electricity consumed by all of the mine's electromechanical equipment. Therefore, mine drainage installations must have high energy efficiency and reliability. An analysis of the operation of the existing drainage installations shows that the pumps are selected with an overpressure. As a result, cavitation occurs in the pumps. It is established that 60-70% of the drainage plants operate in cavitation modes and have a reduced efficiency and correspondingly higher electricity consumption. Known methods for calculating mine drainage installations have the disadvantages, first of all, that they allow the pump to operate in the working area much higher than the rated regime. Pump operation at higher than the nominal supply significantly impairs its energy and cavitation characteristics. An improved method of calculating mine drainage facilities is proposed, through the introduction of additional dependencies and provisions that will increase the energy efficiency of the equipment. The article presents theoretical studies of local resistance of the pipeline of drainage installations. As a result of the research, analytical dependences of the local resistance of the mesh suction valve and the check valve on the diameter of the pipeline were obtained. On the basis of these dependencies an equation is obtained that relates the nominal parameters of the pump and the geometric height of water rise from the inner diameter of the pipeline. This equation is recommended to be used in the calculation of mine district water drainage installations to improve their energy efficiency at the design stage.