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A method of using cooling tower circulating water as water for flue gas desulfurization system

A desulfurization system and circulating water technology, applied in the field of resources and the environment, can solve problems such as easy adhesion to the demister, easy scaling, and large water consumption, so as to reduce water consumption, prolong the scaling cycle, reduce resource consumption and The effect of economic input

Inactive Publication Date: 2011-12-21
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Calcium sulfite has relatively strong adhesion, and it is easy to adhere to the surface of the demister during the operation of the desulfurization system, and it is easy to scale after long-term operation
[0010] The traditional desulfurization system uses reclaimed water, which consumes a lot of water

Method used

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  • A method of using cooling tower circulating water as water for flue gas desulfurization system

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Effect test

Embodiment 1

[0029] A power plant has 7 sets of 130t / h boilers, the cooling tower circulating water control concentration rate is 2, the pH value is 8.2, the chloride ion is 480mg / L, the calcium ion is 250mg / L, the phosphorus is 1.56mg / L, and the total alkalinity is 8.2mmol / L, the amount of sewage discharged before the transformation was 200t / h, the water consumption of the desulfurization system was 100t / h, and the amount of sewage discharged met the water consumption for desulfurization; The water consumption is reduced by 100t / h, the transformation cost is 100,000 yuan, the annual water consumption is reduced by about 240,000 yuan, and the desulfurizer cost is reduced by 29,000 yuan. The system and equipment are operating normally.

Embodiment 2

[0031] There are three 420t / h boilers in a power plant, the cooling tower circulating water control concentration rate is 3, the pH value is 8.0, the chloride ion is 675mg / L, the sodium ion is 3296mg / L, the calcium ion is 498mg / L, and the total alkalinity is 17.9mmol / L, before the transformation, the sewage discharge volume was 170t / h, and the water consumption of the desulfurization system was 120t / h. The sewage discharge volume met the desulfurization water consumption. Reduce 120t / h, the transformation cost is 158,000 yuan, the annual reduction of water consumption is equivalent to 332,000 yuan, and the cost of desulfurization agent is reduced by 39,000 yuan. The system and equipment are operating normally.

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Abstract

The invention discloses a method for using circulating water of a cooling tower as water for a flue gas desulfurization system. The circulating water of the cooling tower is used as the basic water in the tower when the desulfurization system is started. When the desulfurization system is first started, the circulating water of the cooling tower is used to prepare a desulfurizer. During the operation of the desulfurization system, the circulating water of the cooling tower is used to flush the demister and replenish process water into the desulfurization tower of the desulfurization system. The water in the power plant system is reused to treat waste with waste, which reduces resource consumption and economic investment in the system.

Description

technical field [0001] The invention belongs to the field of resources and environment, and relates to a method for using treated circulating water of a cooling tower as water for a desulfurization system. Background technique [0002] In the circulating cooling system of power plant power generation equipment, the water that has cooled the equipment or medium is sent to the cooling tower for cooling, and the heat released by the water is taken away by the air entering the tower, and the cooled water is reused for cooling device or medium. During the cooling process, due to the continuous evaporation of water and the blowing of the wind, the circulating water is concentrated, resulting in an increase in the salt content in the water; in addition to the concentration of circulating water, dust and some harmful gases in the air (such as SO 2 ) will also enter the circulating water; based on the above factors, the circulating water of the cooling tower needs to be regularly di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 莫建松夏纯洁程斌吴忠标程常杰
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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