Liquid gravity distillation seawater desalination method and device

Abstract

The invention relates to a liquid gravity distillation seawater desalination method and device. The device is characterized by mainly comprising a strong brine collecting and seawater supplementing tank, a solar heat collector, a water heater water collector, a hot seawater inlet vertical pipe, a hot seawater collecting tank, an evaporation chamber, a booster fan, a condensation chamber, a condensed desalted water discharging vertical pipe, a fresh water pool, a strong brine return pipe and the like, and further comprises auxiliary device such as an industrial waste heat heating coil, a chilled water pipe or a heating coil, a cooling coil, a cooling water feeding pump, a fresh water draining pump, a decompression water pump, an evaporation chamber water filling pipe, a condensation chamberwater filling pipe, a vacuumizing device and the like. Compared with other distillation technologies, the liquid self-gravity negative-pressure distillation technology has outstanding characteristics, and a working pressure environment is maintained by virtue of negative pressure generated by desalted seawater and fresh water generated by the liquid self-gravity negative-pressure distillation technology, so that the evaporation and condensation temperature is reduced, and full utilization of low-grade heat energy, waste heat and solar energy is facilitated; the number of power consumption parts of the system is small, and the operation cost is relatively low; and the system device is simple in structure.

Description

technical field [0001] The invention relates to the field of desalination of seawater, in particular to a method and device for desalination of seawater by liquid gravity distillation. Background technique [0002] With economic globalization and rapid population growth, the demand for fresh water in countries around the world is increasing day by day, and many countries have also increased their investment in seawater desalination research. At present, the desalination of seawater and brackish water has become one of the important ways to solve the freshwater problem. The existing seawater desalination methods in industry are mainly two categories: distillation and reverse osmosis. Distillation is mainly used in super-large seawater desalination treatment. The equipment is large in size and expensive in equipment. Moreover, the existing combined devices need to use electricity and heat energy at the same time. Moreover, such devices are generally combined with power plants...

AI Technical Summary

Problems solved by technology

Distillation is mainly used in super-large seawater desalination treatment. The equipment is large in size and expensive in equipment. Moreover, the existing combined devices need to use electricity and heat energy at the same time. Moreover, such devices are generally combined with power plants, which is not conducive to coastal residents. Life promotion and application of small and medium-sized coastal fishing boats

The current obstacles to the reverse osmosis method are the short service life of the membrane, the high cost of membrane replacement, and the high requirements for seawater pretreatment. The reverse osmosis membrane, high-pressure pump, and energy recovery device need to be replaced regularly, and the operation is troublesome.

Moreover, seawater desalination is an energy-intensive industry, and large-scale seawater desalination needs to consume a huge amount of natural resources and energy, so the cost of seawater desalination has always been high.

Images