【HaiChuan’s Best Practices】The project on automatic control of chemical dosing in thermal power boilers and energy-saving applications in the Thermal Power Operations Department of Ningxia Energy Chemical Group has played a significant role in promoting energy conservation and emission reduction

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On September 15, at the central control room of the Ningxia Energy and Chemical Thermal Power Operation Department, operator Zhao Chuang carried out real-time dosage adjustments and water quality monitoring using the intelligent boiler steam and water management platform; key parameters such as pH value and conductivity were displayed clearly on the platform, remaining stable and under control. “Since the project was put into operation, we no longer need to go to the site to add chemicals manually; the system handles it automatically, which is safer and more convenient. ”Zhao Chuang said. The project he mentioned is an important innovative initiative by Ningxia Energy Chemical in the field of energy conservation and environmental protection – namely, the project for the automatic control of chemical dosing in thermal power boilers along with energy-saving applications. By introducing new environmentally friendly chemicals and intelligent control systems, this project enables a greener and more intelligent operation of thermal power boilers, thus opening up new avenues for companies to reduce energy consumption, lower costs, and improve efficiency. The Thermal Power Operation Department of Ningxia Energy Chemicals is equipped with two ultra-high pressure boilers and two 330-megawatt subcritical generator sets, providing cogeneration services to downstream users. Traditional thermoelectric plant boilers use ammonia, hydrazine, and phosphate treatment processes for their water; the lag in information automation technology, coupled with the dominance of manual operation methods, leads to frequent fluctuations in the steam and water parameters of the boilers as well as in their blowdown rates. This not only affects the operational efficiency of the boilers but also poses safety risks. To contribute to energy conservation and emission reduction, Ningxia Energy Chemical has launched a project for the development of automatic control systems for chemical dosing in thermal power boilers, as well as energy-saving applications, following extensive research and thorough evaluation. Focusing on technological innovation, this project successfully introduced new boiler water treatment agents based on oximes, carbazides, and amine-based organic compounds as their key components. With their non-toxic and environmentally friendly properties, these new agents have successfully replaced traditional ones, thereby eliminating safety risks. At the same time, by leveraging advanced online water quality monitoring technologies and DCS (Distributed Control System), they developed an intelligent management platform for boiler steam and water, which monitors changes in these parameters in real time and automatically adjusts the dosage of chemicals according to preset parameters, thereby ensuring the continuous stability and optimization of the boiler water quality. Compared to traditional manual management methods, intelligent control systems significantly improve the accuracy of management, effectively reducing the adverse effects of water quality fluctuations on boiler operation, thereby providing a solid guarantee for the safe and efficient operation of boilers. It is reported that since the project was put into operation in June, the waste discharge rate of the boilers at Ningxia Energy and Chemical Industry has decreased by 23.6% on a year-on-year basis. It is estimated that this will result in savings of 2,000 tons of standard coal per year, contributing effectively to energy conservation and emission reduction.