Method and equipment for improving latent heat utilization rate in seawater desalination

A latent heat and equipment technology, applied in the field of improving latent heat utilization efficiency in seawater desalination, can solve problems such as long condensation pipes, reduced temperature difference, and inability to transfer heat out

Inactive Publication Date: 2013-12-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are the following deficiencies: on the one hand, because the latent heat of condensation is transferred by direct heat conduction, the heat cannot be transferred out quickly, and the heat accumulates in the pipe to increase the temperature, the temperature difference between the inner wall of the pipe and the steam decreases, and the steam condensation speed Slow down, resulting in the steam not being able to condense completely in the pipeline, resulting in the loss of latent heat of condensation; on the other hand, in order to fully condense the steam, the condensing pipeline is generally long, which takes up a lot of space and increases the volume of seawater desalination equipment
[0005] So far, this field has not yet developed a seawater distillation method that can improve the recovery and utilization rate of latent heat in the process of seawater desalination, reduce the loss of latent heat, reduce the space occupied by the latent heat recovery device, and finally reduce the cost of seawater desalination and save energy. Dilution method

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  • Method and equipment for improving latent heat utilization rate in seawater desalination

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Embodiment 1

[0045] A small principle prototype was fabricated, referring to figure 2 The structure, in the front section of the seawater preheating box, the working medium is a mixture of seawater and air. MPa, the temperature of the mixture in the pipeline is 80°C; the temperature of the water vapor mixture at the inlet of the condenser is 130°C, the size of the thermoelectric device is 50mmx50mmx4mm, and a thermoelectric device is placed, the total latent heat power of the water vapor mixture is 109.7W. It has been measured that the electric power consumed by the thermoelectric device is 13.2W, the heat released at the hot end of the thermoelectric device is 129.6W, and the heat absorbed at the cold end is 116.8W, recovering 106.5% of the latent heat of condensation of water vapor (including part of the single-phase liquid water released by cooling heat). After the same measurement, if there is no thermoelectric device, only 17.2W of heat can be absorbed under the same conditions, whi...

Embodiment 2

[0047] refer to figure 2 The working medium is a mixture of seawater and air in the front pipeline of the seawater preheating box, the flow rate of seawater at normal temperature and pressure is 8mL / min, the flow rate of air is 800mL / min, the working pressure is 0.1MPa, and the temperature of the mixture in the pipeline is 80 °C; the temperature of the water vapor mixture at the inlet of the condenser is 130 °C, the size of the thermoelectric device is 50mmx50mmx4mm, and three thermoelectric devices are placed, the total latent heat power of the water vapor mixture is 292.6W. According to the measurement, the electric power consumed by the thermoelectric device is 65.2W, the heat output at the hot end of the thermoelectric device is 308.8W, the heat absorption at the cold end is 244W, and 83.4% of the latent heat of condensation of water vapor is recovered. After the same measurement, if there is no thermoelectric device, only 54.4W of heat can be absorbed under the same cond...

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Abstract

The present invention relates to a method and equipment for improving latent heat utilization rate in seawater desalination and provides a method for improving latent heat utilization rate in seawater desalination. The method comprises the following steps: providing a thermoelectric device and electrifying the thermoelectric device. The invention further discloses equipment for improving latent heat utilization rate in seawater desalination.

Description

technical field [0001] The invention belongs to the field of seawater desalination, and relates to a method and equipment for improving latent heat utilization efficiency in seawater desalination. Background technique [0002] The shortage of fresh water resources in the world has become a growing concern. As an open-source incremental technology for water resources, seawater desalination has become an important way to solve the global water crisis. By 2008, more than 120 countries and regions in the world had applied seawater desalination technology. There were more than 13,000 seawater desalination plants in the world. Water supply problem for more than 100 million people [0003] The seawater desalination methods currently used include seawater freezing method, electrodialysis method, distillation method, reverse osmosis method, etc., among which distillation method and reverse osmosis method are dominant, and are suitable for large-scale seawater desalination technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/08
CPCF25B21/02F25B2321/0252C02F1/048C02F2103/08C02F2303/10B01D1/0017B01D5/006B01D5/0042Y02W10/30Y02A20/124H10N10/13
Inventor 吴汀柏胜强尹湘林鲁红亮陈立东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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