A pv/t driven thermal membrane combined seawater desalination system

Abstract

The invention discloses a PV / T driven thermal membrane combined seawater desalination system, relates to the technical field of seawater desalination, and includes a PV / T subsystem, a humidification and dehumidification subsystem and a reverse osmosis membrane subsystem. Among them, the PV / T subsystem includes inverters, thermal collector circulation pumps, and PV / T collector arrays; the humidification and dehumidification subsystem includes compressors, condensers, throttle valves, auxiliary heat exchangers, and primary seawater spray Shower, primary humidifier, primary concentrated seawater collector, hot water circulation pump, air outlet regulating valve, centrifugal fan, cooling seawater circulation pump, evaporator, precooler, fresh water collector, water replenisher, secondary heat Water sprinkler, secondary humidifier, float valve, secondary treated water collector, residual liquid discharge valve, air inlet regulating valve; reverse osmosis membrane subsystem includes seawater sedimentation tank, raw water pump, PP cotton filter element, microporous folding Filter element, booster pump, RO reverse osmosis membrane, ultraviolet sterilizer, granular activated carbon filter, split tee.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a PV / T driven thermal film combined seawater desalination system. Background technique [0002] At present, there are still many areas in our country, such as islands, reefs, saline-alkali lands, ships, etc., where there is a shortage of fresh water resources due to geographical location, climate and other reasons. The scarcity of fresh water seriously threatens the healthy life of local residents. At present, there are three main ways to solve the problem of fresh water supply: development of local water resources, water conservancy transportation and in-situ seawater desalination. Among them, the development of local water resources and water conservancy and water transportation are easily affected by geographical location and difficult to carry out. In contrast, seawater desalination, as a technology with flexible construction scale and good water quality, can be...

AI Technical Summary

Problems solved by technology

Although the device recovers the heat of thermal seawater desalination in the form of cooling water to provide reverse osmosis membrane flux, but for the low-temperature multi-effect seawater desalination device used in the thermal method, it is still unavoidable to scale the thermal seawater desalination device At the same time, the low-temperature multi-effect seawater desalination device is complicated and requires special maintenance

Chinese patent CN 103058438A discloses a thermal membrane coupled seawater desalination system with a steam turbine, including a seawater pretreatment unit, a reverse osmosis unit, and a low-temperature multi-effect unit. Although the device uses a steam turbine to drive a high-pressure pump to reduce the high-energy consumption, and the exhaust steam discharged from the steam turbine can still enter the low-temperature multi-effect unit for heat exchange, but the system still needs to provide a stable steam source for the steam turbine to drive the booster pump of the reverse osmosis unit to work

Therefore, the system has strict requirements on site selection and maintenance, and is not suitable for independent small seawater desalination devices

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