Reverse-osmosis seawater desalting device based on organic rankine cycle

Abstract

The invention discloses a reverse-osmosis seawater desalting device based on organic rankine cycle; the reverse-osmosis seawater desalting device comprises an organic rankine cycle system and a reverse-osmosis system; the organic rankine cycle system comprises an evaporator, an expansion machine, a condenser and a working medium pump communicated in sequence; the outlet of the working medium pump is communicated with the inlet of the evaporator; the reverse-osmosis system comprises a high-pressure pump, an energy recovery device, a reheater and a reverse-osmosis membrane connected in sequence; fresh water generated by the reverse-osmosis membrane enters a fresh water tank to be stored; strong brine is discharged into a strong brine tank; a waste heat supply pipeline is communicated with a waste heat pipeline of the reheater through a branched pipeline; an electric adjusting valve is arranged on the branched pipeline; and the evaporator, the condenser and the reheater are convective heat transfer devices. According to the invention, industrial waste heat is used as the power in the reverse-osmosis seawater desalting process, so that high-efficiency recovery of waste heat is realized; simultaneously, raw seawater is pre-heated to the optimal temperature of the reverse-osmosis membrane, so that the reverse-osmosis membrane always runs at the optimal temperature; and thus, the service life of the reverse-osmosis membrane is effectively prolonged.

Description

technical field [0001] The invention relates to a reverse osmosis seawater desalination device, in particular to a reverse osmosis seawater desalination device based on an organic Rankine cycle, which belongs to the field of industrial energy conservation. Background technique [0002] Water resources are the material basis of all production and life in human society. Without water and water resources, there will be no human beings. Since the 21st century, the problem of water resources has become an important restrictive factor that plagues the economic and social development of countries all over the world. At present, solutions to water shortages in local areas commonly used in countries around the world include remote water transfer, underground water intake, and construction of reservoirs, etc. However, long-term use has caused many disadvantages such as depletion of water resources, waste of land, ground subsidence, and ecological damage, which cannot be fundamentally ...

AI Technical Summary

Problems solved by technology

It is a pity that these waste heat resources cannot be recycled and are wasted in vain.

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