System and method for controlling concentration ratio of open type circulating cooling water system

Abstract

The invention relates to a system and method for controlling the concentration ratio of an open type circulating cooling water system. The system for controlling the concentration ratio of the open type circulating cooling water system includes a control system and a cooling tower; a cooling tower water tank with a cooling tower water tank liquidometer is arranged below the cooling tower; the bottom of the cooling tower water tank is provided with a pollution discharge pipeline; the pollution discharge pipeline is provided with a circulating water conductivity meter, a circulating water temperature gauge, a pollution discharge electric control valve and a pollution discharge flowmeter; a water entering pipeline used for supplementing the cooling tower water tank with water is arranged above the cooling tower water tank; and the water entering pipeline is provided with a water supplementation flowmeter, a water supplementation conductivity meter, a water supplementation electric control valve and a water supplementation temperature gauge, wherein the water supplementation electric control valve is connected with the cooling tower water tank liquidometer. With the system and method of the invention adopted, automatic continuous and stable water supplementation and pollution discharge of the open type circulating cooling water system can be realized; automatic continuous on-line monitoring on the concentration ratio of circulating water can be realized; and concentration ratio fluctuation which is caused by intermittent water supplementation and pollution discharge of the circulating cooling water system can be avoided, so that the quality of the circulating water can be stabilized.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a system and method for controlling the concentration ratio of an open circulating cooling water system. Background technique [0002] During the operation of the open circulating cooling water system, the salt in the water is not taken away due to evaporation loss, and the dissolved salts in the circulating water are continuously concentrated. The ratio of the salt content of the concentrated circulating water to the salt content of the supplementary circulating water is called Concentration ratio. At present, the concentration ratio control of the open circulating water cooling water system generally adopts the following method, that is, first manually measure and calculate the concentration ratio at a certain time, and then manually adjust the circulating water supply and sewage discharge according to the obtained concentratio...

AI Technical Summary

Problems solved by technology

Since circulating water replenishment and sewage discharge are discontinuous operations and lag behind the change of circulating water concentration ratio, the concentration ratio of the circulating water system fluctuates widely, or even doubles down or increases, resulting in unstable circulating water quality. When the concentration ratio is low, the amount of sewage is increased, wasting precious water resources, and when the concentration ratio is high, the risk of corrosion and fouling of the cooling system will increase

At the same time, due to the low degree of automation of the existing circulating water control system, the workload of operating personnel to measure the concentration ratio and operate valves is heavy

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