Device for desalinating seawater through normal-temperature distillation

Abstract

The invention discloses a device for desalinating seawater through normal-temperature distillation, which belongs to a device for desalinating seawater or saline-alkali water by using a desalination method, and comprises a generator, a precipitating and filtering pond, a pretreatment tank, a vapor compressor, a vacuum pump, a seawater preheater, a seawater heater, a submersible pump, a seawater circulation tank, a canned motor pump and a desalination tank. The device disclosed by the invention is characterized in that the device is not provided with a fan. A seawater/freshwater isolator is internally provided with an evaporator, so that the evaporation mode of the device is changed from a single flash evaporation mode into two evaporation modes, namely, a flash evaporation mode and a membrane evaporation mode, the seawater subjected to two times of temperature reduction enters into an evaporator tube to carry out the third temperature reduction, and then enters into a condenser tube to absorb the heats emitted from liquefied vapors outside the condenser tube, which not only saves the cooling water, but also recovers the heats. In the invention, the produced large and medium-sized devices are multi-tank desalination devices which are composite units respectively formed by connecting single tanks in parallel, and the large and medium-sized desalination devices are quick in manufacturing speed and convenient for transportation; and the manufacturing cost of the desalination device is reduced, the energy consumption of the device is reduced, the economic benefit of the device is high, and the concentrated seawater does not pollute the environment.

Description

technical field [0001] The present invention is a device for desalinating seawater or saline-alkali water, specifically, a device for desalinating seawater or saline-alkali water at normal temperature by means of distillation. Background technique [0002] The name of the Chinese invention patent is normal temperature distillation seawater desalination device, the patent number is 02153863.8. The above-mentioned invention patent is modified, and the invention patent application number is 200910022687.8. The application scheme still has a fan installed, and the energy consumption is relatively large. The large and medium-sized desalination devices manufactured only have a single-tank structure, which is not only difficult to manufacture and install, but also difficult to transport. Contents of the invention [0003] The normal temperature distillation seawater desalination device of the present invention overcomes the shortcomings of the prior art and provides a new technic...

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Problems solved by technology

[0002] The name of the Chinese invention patent is normal temperature distillation seawater desalination device, the patent number is 02153863.8. The above-mentioned invention patent is modified, and the invention patent application number is 200910022687.8. This application plan still has a fan installed, and the energy consumption is relatively large.

The large and medium-sized desalination devices manufactured only have a single-tank structure, which is not only difficult to manufacture and install, but also difficult to transport

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