High pressure pump for sea water desalination

Abstract

The invention provides a high pressure pump for sea water desalination. The high pressure pump for sea water desalination comprises a main shaft which is driven through a motor, a multi-stage pressurizing vortex plate structure, a multi-stage pressure complementing vortex plate structure and a multi-stage energy recovering vortex plate structure, wherein the multi-stage pressurizing vortex plate structure, the multi-stage pressure complementing vortex plate and the multi-stage energy recovering vortex plate structure penetrate the main shaft and are sequentially mounted in a serial connectionmanner; the multi-stage pressurizing vortex plate structure is capable of receiving original sea water from the outside and is driven by the main shaft to pressurize the original sea water by grades in order to output high pressure sea water; the multi-stage pressure complementing vortex plate structure is that the pressure complementing vortex plate structure at each stage can be driven by the main shaft to complement pressure to the sea water subjected to reverse osmosis in the pressure complementing vortex plate structure at each stage and output the pressure complemented sea water; the multi-stage energy recovering vortex plate structure is capable of receiving high-pressure strong brine subjected to reverse osmosis and converting the pressure energy of the high-pressure strong brine into dynamic energy of the main shaft as well as outputting low-pressure strong brine. The high pressure pump for the sea water desalination is simple and compact in structure, small in occupied area,and convenient to automatic control in running, and convenient to repair and maintain; the service life of a reverse osmosis die set can be prolonged; and the energy consumption is decreased.

Description

Technical field: [0001] The invention relates to the technical field of fluid mechanical engineering, in particular to a high-pressure pump for seawater desalination with a new structure. Background technique: [0002] At present, almost all seawater desalination processes in China use reverse osmosis membranes to work in series, such as figure 1 As shown, the six reverse osmosis membranes 100 are arranged in series in the protection pipe 200 . Occasionally, the new reverse osmosis membrane integrated purification system uses reverse osmosis membranes to work in parallel, such as figure 2 and image 3 As shown, the new reverse osmosis membrane integrated purification system includes a motor 300, a membrane pump integrated separation purifier 400, a reverse osmosis membrane component 500, a water inlet section 600, a water outlet section 700, seawater inlet A1, clear water collection outlet B1, concentrated Seawater connection port C1. However, at present whether figure...

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Problems solved by technology

[0003] for figure 1 The old-fashioned reverse osmosis membranes work in series and configure high-pressure pump technology, which has the following defects: it takes up a large space, and the capital investment cost is high; the pressure in the reverse osmosis membrane decreases step by step, the water output of the osmosis membrane decreases step by step, and the separation efficiency is low ( This is because: when seawater enters the first-stage reverse osmosis membrane, the salt concentration is low and the pressure is high. After reverse osmosis, part of the fresh water enters the next-stage reverse osmosis membrane, which will cause the salt concentration to increase step by step. The reverse osmosis membrane requires higher reverse osmosis pressure); the utilization rate of the reverse osmosis membrane varies, and its service life varies; the reverse osmosis membrane 100 is embedded in the same protective tube 200, which is not conducive to monitoring and maintenance

[0004] for figure 2 and image 3 The new reverse osmosis membrane integrated purification system shown is equipped with a high-pressure pump process, which has the following defects: the parallel structure occupies a slightly larger space; the high-pressure pump 800 (see Figure 4 ) and reverse osmosis membrane integrated purification system are equipped with separate motor drives, which increases the difficulty of circuit wiring and increases the difficulty of automatic control of the system to a certain extent; the existence of high-pressure pump 800 increases the number of hidden fault points; high-pressure pump 800 and motor 300 are independent of each other, which is not conducive to the comprehensive utilization of energy

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