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Sea water desalting device for heating sea water by using residual heat of waste gas

A waste gas and seawater technology, applied in seawater treatment, water/sewage treatment, general water supply conservation, etc., can solve the problems of increasing heat exchanger investment and equipment layout space, increasing heat exchange loss of heat exchangers, etc., to save equipment investment , reduce industrial energy consumption, and improve the efficiency of heat energy utilization

Active Publication Date: 2014-11-19
孔令斌
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Problems solved by technology

There are two major problems in this technical solution: one is to increase the heat exchanger invest

Method used

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  • Sea water desalting device for heating sea water by using residual heat of waste gas

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Embodiment Construction

[0012] like figure 1 As shown, six seawater evaporation tanks are arranged in a row at the same horizontal position, the exhaust gas inlet pipe 1 is connected to the heating pipe in the first-stage seawater evaporation tank 3, the heating pipes in the adjacent two-stage seawater evaporation tanks are connected, and the exhaust gas discharge pipe 11 It is connected to the heating pipe in the sixth-stage seawater evaporation tank 8 to form a waste gas heating channel. The air circuit pipe 15 of the fan air outlet is connected to the bottom of the first-stage seawater evaporation tank, and each condensation pipe is connected to the top space of the previous-stage seawater evaporation tank and the bottom space of the rear-stage seawater evaporation tank (for example, connected to the fifth and sixth-stage seawater evaporation tanks) The condensing pipe 12 is connected to the top space of the fifth-stage seawater evaporation tank 7 and the bottom space of the sixth-stage seawater e...

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Abstract

The invention provides a sea water desalting device for heating sea water by using residual heat of waste gas. A waste gas heating passage penetrating through all the sea water evaporating pots, an air circulation passage communicated with the sea water evaporating pots, and a fresh water flowing-out passage are arranged to form the sea water desalting device which uses heat for humidification and dehumidification to prepare fresh water and solid state sea salt in a stair manner. The high-temperature waste gas of an electricity generation industry, a glass industry, a cement industry and a steel industry enters heating pipes of the sea water evaporating pots at each grade to heat and evaporate the sea water. Air flows along a circulation loop, vapor in the sea water evaporating pots at each grade is carried into a condensation pipe to be coagulated into fresh water, and the fresh water enters into a fresh water collecting pipe and flows out of the sea water desalting device. Along with continuous yield of the fresh water, the sea water is supplemented timely, grade by grade, forwards and automatically. The evaporation quantity of the sea water in the first stage sea water evaporating pot is the largest, the salt concentration of the sea water which is supplemented to enter the first stage sea water evaporating pot is high, and sea salt is crystallized and deposited at the bottom of the pot. A sea salt discharge valve is opened, and solid state sea salt is discharged, so that the separation of the fresh water from the salt is achieved.

Description

Technical field [0001] The invention relates to a seawater desalination device, in particular to a seawater desalination device for heating seawater by waste heat of waste gas. Background technique [0002] With the intensification of the global water crisis, the seawater desalination industry has entered a period of rapid development, and it is also ushered in a great opportunity for the advancement of seawater desalination technology. At present, multi-effect distillation, multi-stage flash evaporation and reverse osmosis membrane are the mainstream technologies in the world. The rapid spray distillation method is a new technology invented in the United States. It has the technical advantages of desalinating seawater and obtaining solid sea salt at the same time. It solves the problem of concentrated seawater discharge faced by multi-effect distillation, multi-stage flash evaporation and reverse osmosis membrane method. Chinese invention patent "A seawater desalination de...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/16C02F103/08
CPCY02A20/124
Inventor 孔令斌
Owner 孔令斌
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