Stirling cycle-based heat-drive free piston reverse osmosis seawater desalination power system

Abstract

The invention discloses a stirling cycle-based heat-drive free piston reverse osmosis seawater desalination power system, wherein the system comprises a type free piston type stirling engine cold cavity(1), an engine cooler (2), an engine heat regenerator (3), an engine heater (4), a type free piston stirling engine heat cavity (5), a free piston assembly (6), a compression energy accumulator (7),a two-position two-way electromagnetic valve (8), a load energy accumulator(9) and a seawater desalination reverse osmosis membrane component (10), and the engine cooler (2), the engine heat regenerator (3) and the engine heater (4) are connected end to end; according to the system disclosed by the invention, stirling cycle power is utilized, the reciprocating motion of the free piston assembly is realized under the cooperation of the compression energy accumulator, and seawater in a pump cavity is pushed to overcome osmotic pressure to enter the reverse osmosis membrane component for desalination; the system disclosed by the invention reduces energy conversion and transmission links by simplifying transmission chains, and the energy economical efficiency of reverse osmosis desalination can be further improved.

Description

technical field [0001] The invention relates to the field of heat-driven reverse osmosis desalination, in particular to a heat-driven free-piston reverse osmosis seawater desalination power system based on Stirling cycle. Background technique [0002] Fresh water resources are an important material basis for human survival, economic development and social progress. Nowadays, due to the vigorous development of industry, the discharge of domestic sewage, the dumping of garbage, etc., water pollution is becoming more and more serious. Now most countries in the world are water-deficient countries, and there is a large amount of seawater on the earth. Desalination of seawater is an effective way to solve the shortage of freshwater resources in coastal areas. While alleviating the shortage of fresh water resources, seawater desalination has also brought new pressures on energy and the environment. With the increasingly tense energy and environmental issues, the energy required f...

AI Technical Summary

Problems solved by technology

Although there is no phase change in this process, the inherent energy consumption of the process is less, and the hydraulic energy of concentrated seawater after desalination can also realize energy recovery, but the power source of reverse osmosis desalination is a high-pressure pump, and its working pressure generally increases with the increase of seawater salinity However, in order to maintain a high water production rate of the equipment, the high-pressure pump needs to provide additional driving force for the seawater to overcome the process resistance, and its working power consumption generally accounts for about 35% of the system energy consumption.

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