Self-pressurization energy recovery high-pressure pump for reverse osmosis sea water desalinization

Abstract

The invention relates to a self-pressurization energy recovery high-pressure pump for reverse osmosis sea water desalinization. The self-pressurization energy recovery high-pressure pump is provided with a centre block, a reversing control valve, a guide control valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein a plurality of internal flow channels are formed in the centre block; the reversing control valve is arranged above the center block, is communicated with the internal flow channels of the centre block and is provided with a high pressure saline water hole, a first discharge port and a second discharge port which are respectively and symmetrically arranged at the two sides of the high pressure saline water hole; the guide control valve is arranged under the centre block, is communicated with the internal flow channels of the centre block and is provided with a raw seawater water inlet hole, a third discharge port and a fourth discharge port which are respectively and symmetrically arranged at the two sides of the raw seawater water inlet hole; the first hydraulic cylinder is arranged at the left side of the centre block, is communicated with the internal flow channels of the centre block and is symmetrically provided with a first liquid flow hole and a second liquid flow hole; and the second hydraulic cylinder is arranged at the right side of the centre block, is communicated with the internal flow channels of the centre block and is symmetrically provided with a third liquid flow hole and a fourth liquid flow hole. The self-pressurization energy recovery high-pressure pump is reliable in operation and low in manufacturing cost, has high efficiency and is suitable for a small-sized reverse osmosis sea water desalinization system; and the recovery efficiency of energy is above 90%.

Description

technical field [0001] The invention relates to a high-pressure pump. In particular, it relates to a reverse osmosis seawater desalination self-boosting energy recovery high-pressure pump used in seawater and brackish water reverse osmosis desalination systems. Background technique [0002] The reverse osmosis desalination technology uses a high-pressure pump to pressurize the raw seawater to make it reach the required operating pressure. The pressurized raw water flows into the pressure vessel of the reverse osmosis membrane, and the fresh water that passes through the reverse osmosis membrane becomes product water. The concentrated brine passing through the reverse osmosis membrane is discharged with high pressure. Since the discharged concentrated brine still has a high pressure, if it is not used, it will cause about 60% energy waste. The technology to recycle the residual pressure of the concentrated brine in the reverse osmosis system is the energy recovery technology...

AI Technical Summary

Problems solved by technology

There are two main reasons: first, the efficiency of large high-pressure pumps used in reverse osmosis seawater desalination systems is higher than that of small high-pressure pumps; second, there is no energy recovery equipment particularly suitable for small reverse osmosis seawater desalination devices. The type of energy recovery equipment for reverse osmosis seawater desalination equipment is either difficult to choose, or the investment is very uneconomical

Images