Pressure exchange method of pressure exchange pump

Abstract

The invention discloses a pressure exchange method of a pressure exchange pump. A method for directly and effectively exchanging the pressure of high-pressure liquid and the pressure of pressurized liquid is provided through the pressure exchange pump, the regurgitant high-pressure liquid can be recycled efficiently and reasonably, liquid which is sucked into a cylinder and needs to be pressurized is pushed by the high-pressure liquid flowing back to a cylinder at the other end of a piston through the reciprocating motion of the piston of the pressure exchange pump in the cylinder and sequential opening and closing of valves on the cylinder, and therefore efficient transfer of the pressure, namely, pressure exchange is achieved, the piston can be made to move forwards through low kinetic energy, efficient high-pressure liquid energy recovery and energy conversion can be achieved, the energy conversion mode is more reasonable, consumed electric energy and other power can be obviously reduced or even eliminated, the energy saving effect is obvious, and the method can be widely applied to the high-pressure washing and absorption process and the work condition that existing liquid needs to be pressurized and the pressure of the high-pressure liquid needs to be reduced.

Description

technical field [0001] The invention relates to a pressure exchange method, in particular to a pressure exchange method of a pressure exchange pump. Background technique [0002] In the high-pressure washing and absorption process of chemical production and other industries, high-power plunger pumps and high-power multi-stage centrifugal pumps are mainly used for high-pressure liquid transportation, while the high-pressure liquid returned from the washing device is simply discharged. The pressure of the high-pressure liquid returned by the washing device can be reused. The current method is to equip the multi-stage centrifugal pump with a hydraulic turbine device. The hydraulic turbine device is an energy-saving device that can partially recover the potential energy of the liquid pressure and convert it into kinetic energy. The principle is that, in addition to completing the high-pressure liquid transportation, at the same time, after the high-pressure return liquid is recy...

AI Technical Summary

Problems solved by technology

[0002] In the high-pressure washing and absorption process of chemical production and other industries, high-power plunger pumps and high-power multi-stage centrifugal pumps are mainly used for high-pressure liquid transportation, while the high-pressure liquid returned from the washing device is simply discharged. The pressure of the high-pressure liquid returned by the washing device can be reused. The current method is to equip the multi-stage centrifugal pump with a hydraulic turbine device. The hydraulic turbine device is an energy-saving device that can partially recover the potential energy of the liquid pressure and convert it into kinetic energy. The principle is that, in addition to completing the high-pressure liquid transportation, at the same time, after the high-pressure return liquid is recycled into the hydraulic turbine device, it will jointly drive the multi-stage centrifugal pump to rotate and do work with the power of the motor, thereby reducing the power output of the motor. , to achieve the purpose of energy saving, the advantage of this device is that the structure is simple, but the disadvantage is that because the hydraulic turbine device first converts the potential energy of the liquid pressure into mechanical energy and then utilizes it, the recovery and utilization of energy is unreasonable, which also determines Its energy recovery efficiency is too low, the maximum recovery rate in practical applications is only 30%, and the energy consumption of high-power motors with high energy consumption is only slightly reduced, and the energy-saving effect is not obvious

At present, there is no more reasonable liquid pressure recovery and utilization device, and a more direct and effective liquid pressure exchange method

Images