Circulating water digital on-line monitoring control device and method

Abstract

The invention provides a circulating water digital on-line monitoring control device which comprises a chemical control device, a circulating water tank, a cooling tower, a circulating pipeline and aheat exchanger, the circulating water tank is communicated with the cooling tower and connected with the heat exchanger through the circulating pipeline, and the chemical control device is connected with the circulating water tank and used for feeding chemicals into the circulating water tank. Circulating water is treated in the circulating water tank, enters the heat exchanger through the circulating pipeline for heat exchange, flows into the cooling tower for cooling and then returns to the circulating water tank. The circulating water digital on-line monitoring control device is used for monitoring and controlling the water quantity, the chemical dosage, the water quality and the dirt thermal resistance of the heat exchanger, the concentration ratio of circulating water is controlled byautomatically adjusting the chemical adding amount, the purpose of reducing the amount of circulating water and sewage is achieved, and through circulating water sewage pretreatment, circulating water sewage advanced treatment and recycling and tail end wastewater rotational flow atomization evaporation treatment, economical zero discharge of wastewater is effectively realized.

Description

technical field [0001] The invention relates to waste water zero-discharge treatment, in particular to a digital online monitoring and control device and method for circulating water. Background technique [0002] The circulating cooling water system is the system used in thermal power plants with the largest displacement, and it is also a key point of water conservation and emission reduction. Under the new environmental protection requirements such as the "Water Pollution Prevention and Control Action Plan" sewage discharge permit system, saving water, improving the effect of sewage treatment, dosing and management automation are the problems that need to be solved urgently, especially the water-saving reduction of circulating water sewage in thermal power plants Processing has become a hot research technology today. The circulating water sewage treatment technology is coagulation clarification→filtration→ultrafiltration-reverse osmosis treatment process, the concentratio...

AI Technical Summary

Problems solved by technology

The circulating water sewage treatment technology is coagulation clarification→filtration→ultrafiltration-reverse osmosis treatment process, the concentration ratio of circulating water is generally controlled at 3 to 5 times, and membrane scaling, fouling and corrosion problems are prone to occur, and the chemical cleaning cycle is relatively Short, in order to ensure the safe and stable operation of the system, it is usually necessary to add a complete wastewater pretreatment, the investment and operating costs are high, and the existing technology is still not perfect for wastewater treatment

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