Low-temperature heat energy driven device for distilling and separating water evaporated under negative pressure

Abstract

The invention aims to provide a device for distilling and separating water evaporated / boiled under negative pressure. The device has low heating temperature, high efficiency and low cost. The invention provides a scheme, which ensures that the needed negative pressure can be produced in the sea water desalinization systems without vacuum pumps, thus reducing the boiling temperature of the water solution to 30-50 DEG C. The water solution can be boiled as long as the temperature of the heating source is higher than 30-50 DEG C. The heating source for heating and evaporating the water solution in the invention can be water from solar heat collectors, tail water with higher temperature from the power plants, chemical plants, smelting plants and the like or water completing heat exchange with the residual heat from the power plants, chemical plants and smelting plants. The temperature of the heating fluid needed by the invention can be lower than 60 DEG C, preferably 37 DEG C, thus effectively utilizing the solar energy or largely recovering and utilizing the industrial residual heat and having great value in environmental protection and energy saving.

Description

technical field [0001] The invention relates to a low-temperature thermal energy-driven negative pressure evaporation water distillation and separation device, in particular to a low-temperature heat source such as solar energy and waste heat to separate water to be separated (such as seawater, impurity-containing water, polluted water, etc.) Purification treatment. Background technique [0002] Existing water purification methods include distillation, electrolysis, and reverse osmosis. The distillation method is to use a heat source to heat the water to be separated (such as seawater, water containing impurities, water containing pollution, etc., hereinafter also referred to as "water to be separated") to distill out water vapor, and then condense the water vapor to obtain purified fresh water Methods. Since the boiling point of water under normal pressure is as high as 100°C, in order to obtain a large amount of water vapor, it must be heated by a high-temperature heat s...

AI Technical Summary

Problems solved by technology

Although it reduces the evaporation temperature of the water to be separated, it makes the system very complicated and difficult to maintain, and the operation of the vacuum pump also consumes a large amount of high-grade electric energy

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