High-pressure pump with energy recovery turbine

Abstract

The invention relates to the technical field of high-pressure pumps for seawater desalination, and provides a high-pressure pump with energy recovery turbine. The high-pressure pump with energy recovery turbine comprises a pump shaft, a high-pressure pump body and an energy recovery turbine assembly, wherein the high-pressure pump body is connected with the pump shaft in series; the high-pressurepump body comprises a suction section, a middle section and a discharge section; the discharge section is in threaded connection with a sealing box body, the sealing box body is in threaded connectionwith a non-driving end bearing box body; the energy recovery turbine assembly comprises an energy recovery turbine box body and an energy recovery turbine impeller sleeved on the pump shaft; one endof the energy recovery turbine box body is in threaded connection with the suction section, and the other end of the energy recovery turbine box body is in threaded connection with the drive end bearing box body. Therefore, the high-pressure pump body and the energy recovery turbine assembly are coaxially designed, the waste water with relatively high pressure energy is recycled to the energy recovery turbine assembly, so that the conversion of the pressure energy and the mechanical energy can be realized; and the energy consumption of the motor is greatly reduced, the structure is compact, the dismounting and mounting are easy, and the maintenance is convenient.

Description

technical field [0001] The invention belongs to the technical field of high-pressure pumps for seawater desalination, in particular to a high-pressure pump with an energy recovery turbine. Background technique [0002] Reverse osmosis seawater desalination technology (SWRO) uses the permeable characteristics of the semi-permeable membrane to pressurize the seawater, so that the water molecules can overcome the resistance and pass through the semi-permeable membrane, so as to achieve the purpose of separating fresh water from seawater. In addition to being built on land, it is also widely used in vehicles, ships, offshore oil rigs, islands, and the field. This requires high-pressure pumps and energy recovery turbines to occupy a small area, small size, and easy maintenance. [0003] According to the principle of reverse osmosis seawater desalination, the high-pressure pump is an important equipment for providing energy for reverse osmosis seawater desalination. In the revers...

AI Technical Summary

Problems solved by technology

In the reverse osmosis seawater desalination system, in the cost of desalinated water per ton, the investment cost accounts for about 25%, the electricity cost accounts for more than 52%, and the two together account for more than 77% of the water production cost. Energy consumption is the main factor, and the pressure of the concentrated seawater generated at the same time is as high as 5.0MPa or more. Calculated according to the 40% recovery rate, about 60% of the pressure energy is contained in the concentrated seawater. If it is not recycled, the loss will be huge

[0004] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

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