Seawater desalination process with low cost

A low-cost, high-tech technology, applied in seawater treatment, general water supply conservation, water/sewage treatment, etc., can solve the problems of large power consumption, operating energy consumption or high production cost, and achieve burden reduction, electric power reduction, and thermal pollution reduction Effect

Active Publication Date: 2010-06-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the most mature technologies at home and abroad are multi-stage flash distillation (MSF) and reverse osmosis (RO), which occupy most of the market share, but these two methods have high ener...

Method used

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  • Seawater desalination process with low cost

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Effect test

Embodiment 1

[0024] Embodiment 1: Annual production of 20,000 tons of pure water (summer)

[0025] Production facilities such as figure 1 As shown, the washing humidification tower T-01 has a diameter of 1.2 meters and a height of 10 meters, and the atomization chamber T-02 has a diameter of 1.6 meters and a height of 6 meters; the pretreated 25 ° C seawater is centrifuged at a flow rate of 38 tons / hour After the pump I P-01, it is divided into two strands. One strand is heated to 50°C by the heat exchanger I E-01 at a flow rate of 31 tons / hour, and then enters the top of the washing humidification tower T-01 for spraying. The flow rate of 7 tons / hour is heated to 75°C by heat exchanger IVE-04 and enters T-02 for atomization; 32°C natural air passes through blower G-01 to 10000m 3 The flow rate of / hr is heated to 48°C by heat exchanger II E-02 and then enters the bottom of washing and humidifying tower T-01. After heating and humidifying, it is heated again by heat exchanger III ...

Embodiment 2

[0026] Embodiment 2: Annual production of 10,000 tons of pure water (winter)

[0027] Production facilities such as figure 1 As shown, the washing humidification tower T-01 has a diameter of 0.9 meters and a height of 8 meters, and the atomization chamber T-02 has a diameter of 1.2 meters and a height of 5 meters; the pretreated 5°C seawater is centrifuged at a flow rate of 18 tons / hour After the pump I P-01, it is divided into two streams, one stream is heated to 46°C through the heat exchanger I E-01 at a flow rate of 14 tons / hour, and then enters the top of the washing humidification tower T-01 for spraying, and the other stream is sprayed at the top of the washing humidification tower T-01. The flow rate of 4 tons / hour is heated to 70°C by heat exchanger IV E-04 and then enters the atomization chamber T-02 for atomization; the natural air at 5°C passes through the blower G-01 to 6000m 3 The flow rate of / hr is heated to 39°C by heat exchanger II E-02 and then ente...

Embodiment 3

[0028] Embodiment 3: Annual production of 20,000 tons of pure water (winter)

[0029] Production facilities such as figure 1 As shown, the washing humidification tower T-01 has a diameter of 1.2 meters and a height of 10 meters, and the atomization chamber T-02 has a diameter of 1.6 meters and a height of 6 meters; the pretreated 5°C seawater is centrifuged at a flow rate of 38 tons / hour After the pump I P-01, it is divided into two streams. One stream passes through the heat exchanger I E-01 to 46°C at a flow rate of 31 tons / hour, and then enters the top of the washing and humidifying tower T-01 for spraying. The flow rate of 7 tons / hour is heated to 70°C by heat exchanger IV E-04 and then enters the atomization chamber T-02 for atomization; the natural air at 5°C passes through the blower G-01 to 12000m 3 The flow rate of / hr is heated to 39°C by heat exchanger II E-02 and then enters the bottom of washing and humidifying tower T-01. After heating and humidifying, it ...

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Abstract

The invention relates to a seawater desalination process with low cost, which utilizes the condensate of the vapor cycle of a thermal power plant or a nuclear power station as a heat source, heats seawater to the temperature of 60-80 DEG C and atomizes the seawater in an atomizing chamber. On the other hand, natural air is heated after being washed and humidified, enters the atomizing chamber and contacts the atomized high-temperature seawater mist flow so as to enable part of the atomized high-temperature seawater mist flow to be instantaneously vaporized; fresh water mist droplets generated by the atomization of the high-temperature seawater are lifted by the kinetic energy of air to move upwards; moreover, because the density of water is different from the density of salt, the water and the salt are separated in the movement process; the two blasts of fresh water airflow are cooled by the raw material of cold seawater simultaneously and condensed into fresh water, the heated raw material of the cold seawater is used for washing and humidifying the natural air, and clean air carrying water vapor is recycled after the clean air carrying the water vapor is cooled; and the entire process flow does not consume extra heat energy and only consumes the air and less electric energy required by the transportation of the seawater. The process recovers energy in the condensate of the vapor cycle of the thermal power plant or the nuclear power station, produces the fresh water in large amounts and also produces a by-product of concentrated seawater.

Description

field of invention [0001] The invention relates to seawater desalination technology. Background technique [0002] The world's two major environmental problems, the first is global warming, and the second is the water crisis. Regarding the first article, people have launched substantive actions to reduce greenhouse gas emissions and heat pollution; for the second article, people are also aware of the seriousness of the problem, "the world's future war for resources will be triggered by water" , "After the energy crisis, the next crisis will be the turn of the water crisis" and other statements are by no means alarmist. In this situation, seawater desalination technology has been paid more and more attention by people, especially the seawater desalination technology with low energy consumption and heat pollution reduction is the focus of research and development. At present, the most mature technologies at home and abroad are multi-stage flash distillation (MSF) and reverse...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/16C02F103/08
CPCY02A20/124
Inventor 张志炳邵旻周政孟为民
Owner NANJING UNIV
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