Circulating water quality control system

Abstract

The invention relates to a circulating water quality control system and a control method. The system is connected on a pipeline of a circulating water system and comprises a control system, a detection device and an execution device, wherein the control system is connected with the detection device and the execution device respectively; the detection device consists of a water quality detection device and a water holding quantity detection device; the execution device consists of a water quality adjusting executor and a forced blow-off executor; the forced blow-off executor is connected on the circulating water pipeline of the circulating water system, and the water inlet end and the water outlet end of the water quality adjusting executor are connected on a water source supply inlet pipeline and a circulating water supply pipeline respectively; the water holding quantity detection device is connected on the pipeline of the circulating water system, a cooling tower or a pool; the water quality detection device is connected on a water quality sampling pipe; the water quality sampling pipe is connected on the circulating water pipeline of the circulating water system; and a water inlet valve, a pressure adjusting valve and a water outlet valve are arranged at two ends of the water quality sampling pipe respectively. The system can detect the water quality and the water holding quantity in the circulating water system in real time, stably controls the circulating water quality and the water holding quantity, has low equipment operation and investment costs, and effectively saves the water resources.

Description

technical field [0001] The invention relates to a water treatment system, in particular to a circulating water quality control system. Background technique [0002] At present, circulating water treatment technology is divided into physical method, chemical method and physicochemical method. These treatment technologies are all used for anti-scaling, anti-corrosion and bactericidal algae treatment of circulating water under certain water quality conditions. That is to say, there is a one-to-one static relationship between the circulating water treatment technology and the operating water quality of the circulating water. However, the water quality of the circulating water is gradually deteriorating during the operation period. For example, in the open cooling circulating water system, due to the evaporation and cooling of the water, the anion and cation content in the water gradually increases with the increase of the concentration multiple. That is to say, the water quali...

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Problems solved by technology

[0004] (1) Investment and operation costs are too high: Industrial users need to configure professional water quality analysis laboratories and set up specialized personnel and fixed posts to control water quality stability, while civil users need to entrust operating companies to monitor on their behalf, and the investment and operation costs are relatively high. high;

[0005] (2) The detection is not timely, and secondary pollution is easy: at present, the water quality monitoring and analysis of circulating water are all regular quantitative analysis (industrial circulating water is sampled and analyzed weekly according to regulations, and civil heating and air conditioning circulating water is generally analyzed monthly or quarterly), and The water sample analysis cycle generally takes 3-7 working days

The sampling and analysis period is too long, and dynamic analysis cannot be performed in time, which leads to serious hysteresis in water quality monitoring. When the water quality exceeds the water quality set by the operation and exceeds the discharge standard, it cannot be reflected in time, resulting in excessive discharge water quality and secondary water pollution. In severe cases The system needs to be shut down to clean and re-change the water, affecting the normal operation of the equipment and high maintenance costs

[0006] (3) Waste of water resources is not conducive to water conservation: due to the lag of manual analysis of water quality, the water quality of the system has exceeded the standard for a long time

Therefore, generally during the specific operation period, the operating unit basically adopts the method of replenishing water while draining for a long time to control the water quality, and the amount of replenished water is too large, which wastes water resources

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