Circulating water quality stability control system and control method

Abstract

The invention provides a circulating water quality stability control system and control method. The system comprises a circulating water tank, a circulating pump, a heat exchanger and a cooling tower.The cooling tower is arranged above the circulating water tank, and the circulating water tank, the circulating pump, the heat exchanger and the cooling tower are sequentially connected through pipelines. The circulating water tank is further connected with scale and bacterium eliminating equipment which is used for descaling, sterilization and alga eliminating treatment of circulating water. Thesystem further comprises a detection module, a PLC control module and regulating valves, the regulating valves are arranged on the pipelines respectively, and the scale and bacterium eliminating equipment, the detection module and the regulating valves are all connected with the PLC control module.

Description

technical field [0001] The invention belongs to the technical field of water quality monitoring and control, and in particular relates to a circulating water quality stabilization control system and a control method. Background technique [0002] There is an extremely scarce and wide-ranging problem of urban water resources in my country. Cities across the country are short of 6 billion m3 of water every year, and the annual economic loss due to water shortage is about 200 billion yuan. In my country, the demand for urban water resources involves almost all aspects of the national economy, such as industry, agriculture, construction, and residents' lives. The demand for urban water continues to grow, but the amount of urban water resources is limited. Most of the local water resources in cities It has approached or reached the limit of development and utilization, and the groundwater in some cities is already in a state of overexploitation. When the amount of groundwater ext...

AI Technical Summary

Problems solved by technology

Extensive exploitation and utilization of water resources will increase the discharge of domestic sewage and industrial wastewater, causing surface water and groundwater to be polluted to varying degrees.

Excessive exploitation of groundwater leads to year-by-year decline of groundwater level, reduction of single well water output, increase of water supply cost, and gradual depletion of water resources, resulting in problems such as land subsidence, subsidence, and ground fissures

[0003] According to statistics, industrial water consumption accounts for 21.6% of the total water consumption, while circulating water consumption accounts for 70-80% of industrial water consumption. Therefore, saving cooling circulation water consumption is the most effective measure to save industrial water consumption. During the operation of the circulating water system It is necessary to drain water, replenish water and change water according to the operation requirements. However, most circulating water systems do not have online water quality monitoring and analysis systems at present. Manual control is adopted during operation, and the operation mechanism is relatively poor. The replenishment and drainage operation of the system is only based on experience or feeling, and there is no clear regulation on the replenishment and drainage time and water volume, which leads to serious waste of water resources during the operation of the circulating cooling water system. , serious pollution, heat exchanger and pipeline scaling, corrosion, microbial growth and other problems

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