Seawater desalination device driven by temperature difference energy

Abstract

The invention discloses a seawater desalination device driven by temperature difference energy. The seawater desalination device comprises a warm seawater pool, a solar heat collection plate, a heat preservation cold seawater pool, a drainage pool, a flash tank, a shell-and-tube condenser, a vacuum pump, a buffer tank, a warm seawater pump and a fresh water storage tank. Temperature difference energy between warm seawater and cold seawater is used as an energy source for driving the desalination system to circulate; the sea level rise and fall caused by the tidal effect and the height difference formed between the sea level rise and fall and the sea water desalting device are utilized, so that warm sea water and cold sea water automatically flow in under the driving of gravity, and residual sea water is naturally discharged. Gas-liquid separation in the flash tank adopts a gradient porous defoaming structure, and efficient gas-liquid separation is realized through a capillary suction effect; the heat preservation cold seawater pool comprises an inner pool and an outer pool, and the outer pool is used for refluxing the cold seawater in the condenser and plays a heat preservation role in the cold seawater stored in the inner pool. The seawater desalination device driven by temperature difference energy provided by the invention only needs to consume electric energy of the warm seawater pump and the vacuum pump, and is an energy-saving and low-carbon seawater desalination method.

Description

technical field [0001] The invention belongs to the field of seawater desalination, in particular to a seawater desalination device based on ocean temperature difference energy. Background technique [0002] Freshwater resources are a scarce resource. Freshwater only accounts for 2.5% of all water resources on the earth, and most of them cannot be used directly, such as glacial water, ice layers under permafrost in alpine regions, and deep groundwater. Desalination is an effective way to solve the global problem of freshwater scarcity. Generally, seawater desalination technology can be classified according to the energy required to drive the desalination process, mainly including thermal energy-driven desalination technology and membrane desalination technology. [0003] Before the 1980s, thermal energy-driven desalination technologies via multi-stage flash (MSF) and multiple-effect distillation (MED) dominated the desalination market. Later, due to the development of memb...

AI Technical Summary

Problems solved by technology

However, whether it is the cost problem caused by the high energy consumption of the thermal method or the membrane fouling problem caused by the membrane method, the development of seawater desalination technology is restricted, and the application of renewable energy is an effective way to solve the above problems

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