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Defogging water-collecting device used for wet cooling tower

A technology of wet cooling and water collection device, which is applied in the direction of combined device, dispersed particle separation, chemical instruments and methods, etc., which can solve the problems of affecting the ventilation in the tower, the environmental factors of the cooling tower are greatly affected, and the installation is complicated, so as to relieve the liquid level Disturbing conditions, avoiding smog and icing, and reducing the effect of spreading and multiplying

Inactive Publication Date: 2019-07-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Install water eliminator or wire mesh demister: Although most of the wind blowing loss can be recovered, evaporation loss cannot be recovered, and it will also affect the ventilation in the tower and affect the heat transfer performance of the cooling tower;
[0005] (2) An air heat exchanger is installed in the tower: although part of the wind blowing loss and evaporation loss can be recovered, the installation is complicated and costly and the efficiency is low;
[0006] (3) Dry cooling tower instead of wet cooling tower: Although evaporation loss, wind blowing loss and sewage loss can be completely avoided, the cooling tower is greatly affected by environmental factors and the cost is high, which is about 4-6 times that of the wet cooling tower

Method used

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  • Defogging water-collecting device used for wet cooling tower
  • Defogging water-collecting device used for wet cooling tower
  • Defogging water-collecting device used for wet cooling tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A central coil 3-3 is installed inside the device, and the fiber coalescer is subjected to PDMS-SiO 2 Superhydrophobic modification, to figure 1 The device shown is fed with supersaturated hot and humid gas entraining liquid droplets, and the hot and humid gas enters the device at a speed of 11m / s, and the content of liquid water droplets in the hot and humid gas is from 3.5g / m 3 Change to 12.5g / m 3 , after the device collects water stably for half an hour, collect the water recovered by the device within 10 minutes from the drain pipe 20 of the underflow pipe 26 and the outlet 11 of the transition unit 2 and weigh its quality. In order to reduce the experimental error, multiple times were used in the experiment By weighing and calculating the average value, the water recovery efficiency of the device is about 5%-6% higher than that of the central coil 3-3 under the same conditions.

Embodiment 2

[0058] A central coil 3-3 is installed inside the device, and the fiber coalescer is subjected to PDMS-SiO 2 Superhydrophobic modification, to figure 1 In the device shown, the supersaturated hot and humid gas with entraining liquid droplets is introduced. When the liquid concentration of the hot and humid gas is from 3.5g / m 3 Change to 12.5g / m 3 When the hot and humid gas enters the device at 11m / s, the water recovery efficiency of the device is lower than that of PDMS-SiO 2 Improve about 6%-6.5%.

Embodiment 3

[0060] A central coil 3-3 is installed inside the device, and the fiber coalescer is subjected to PDMS-SiO 2 Superhydrophobic modification, to figure 1 The device shown is fed with supersaturated hot and humid gas with entrained liquid droplets, when the liquid concentration in the hot and humid gas is 10.5g / m 3 , Cooling water flow rate and temperature are 65L / h and 10°C respectively, hot and humid gas enters the device at 11m / s, and the water recovery rate of the device can reach 87.41%.

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Abstract

The invention discloses a defogging water-collecting device used for a wet cooling tower. The device provided by the invention can efficiently recover evaporation loss in the form of gaseous water vapor and wind blowing loss in the form of liquid water droplets in hot and humid gas discharged from the cooling tower, and when a temperature of cooling water and a flow rate of gas reach experimentaloperating conditions, the water recovery efficiency is as high as 80% or more; quality of the recovered water meets a circulating water use standard, and the water can be returned to circulating waterfor use to achieve the purpose of saving water in the wet cooling tower; and at the same time, haze and ice formed by the hot and humid gas in a gas discharge outlet of the cooling tower in the surrounding environment can be effectively avoided, and spreading and diffusion of microorganisms affecting human health, such as legionella can be reduced.

Description

technical field [0001] The invention relates to the fields of energy saving and consumption reduction of industrial circulating water and environmental protection, in particular to a demister and water collection device for wet cooling towers. Background technique [0002] Wet cooling towers are cooling equipment widely used in industrial processes, and consume a large amount of water resources during operation. The water loss mainly includes the following three aspects: wind blowing loss, sewage loss and evaporation loss. Among them, the evaporation loss refers to the moisture in the circulating cooling water that is evaporated in the heat exchange process and is released into the air in the form of water vapor; the wind blowing loss refers to the small water droplets in the circulating cooling water that are blown out of the tower along with the air flow; the blowdown loss is With the continuous evaporation of the circulating cooling water, the dissolved salt in the water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D51/00
CPCB01D51/00B01D50/20
Inventor 康勇余纪成吴思宇
Owner TIANJIN UNIV
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