Application Case of Oxygen Content Monitoring Project in the Economizer Flue Gas of a Power Plant of China Huaneng Group

I. Project Background

China Huaneng Group Co., Ltd. (hereinafter referred to as "China Huaneng"), as a leading energy company in China, has always been committed to improving power generation efficiency, reducing energy consumption, and reducing emissions. In the process of thermal power generation, boiler combustion efficiency directly affects the economic efficiency and environmental protection of the unit. The oxygen content of the flue gas at the outlet of the economizer, as an important component of the boiler, is one of the key parameters reflecting the boiler combustion efficiency.

II. User Needs

In order to achieve accurate monitoring of the oxygen content of the flue gas at the outlet of the economizer, a power plant of China Huaneng decided to install a zirconia oxygen analyzer in the economizer flue. The user put forward the following requirements for the analyzer:

• High-precision measurement: It can accurately measure the oxygen content in the flue gas and provide reliable data support for boiler combustion optimization.

• Good stability: It can operate stably for a long time in harsh environments with high temperature and high dust, reducing maintenance workload.

• Fast response speed: It can quickly reflect the changes in the oxygen content of the flue gas, so that the combustion parameters can be adjusted in time.

• Simple operation and maintenance: It has a user-friendly human-machine interface and self-diagnosis function, which is convenient for users to operate and maintain.

III. Solution

After extensive research and comparison, China Huaneng finally chose our company's Zirconia Oxygen Analyzer . This product adopts advanced zirconia sensor technology and has the following advantages:

• High measurement accuracy: Using imported zirconia sensors, the measurement accuracy can reach ±0.5%FS, meeting the user's needs for high-precision measurement.

• Good stability: The sensor is manufactured using special processes, and has excellent thermal shock resistance, and can operate stably for a long time in high-temperature environments.

• Fast response speed: The sensor response time is less than 5 seconds, and it can quickly reflect the changes in the oxygen content of the flue gas.

• Simple operation and maintenance: Equipped with a color touch screen, the operation interface is user-friendly and supports Chinese and English switching; it has a self-diagnosis function and can monitor the instrument's operating status in real time, making it easy for users to maintain.

IV. Application Effect

After the zirconia oxygen analyzer was installed and operated in the economizer flue of a power plant of China Huaneng, it achieved good application results:

• Accurate oxygen content monitoring: The analyzer can accurately measure the oxygen content in the flue gas at the outlet of the economizer, providing reliable data support for boiler combustion optimization.

• Improve combustion efficiency: Based on the oxygen content data provided by the analyzer, the power plant technicians can adjust the boiler combustion parameters in time, improve the boiler combustion efficiency, and reduce coal consumption.

• Reduce pollutant emissions: By optimizing combustion, the emission of pollutants such as nitrogen oxides and sulfur dioxide in the flue gas is effectively reduced, achieving good environmental protection benefits.

• Reduce maintenance costs: The analyzer operates stably and reliably, with less maintenance workload, saving maintenance costs for users.

V. User Evaluation

China Huaneng gave high praise to the performance and application effect of the zirconia oxygen analyzer, believing that the product has high measurement accuracy, good stability, fast response speed, and simple operation and maintenance, and can meet the power plant's monitoring needs for the oxygen content of the flue gas at the economizer outlet, providing strong support for boiler combustion optimization and energy saving and emission reduction.

VI. Conclusion

The successful implementation of this project fully demonstrates the leading position of our company's zirconia oxygen analyzer in the field of flue gas oxygen content monitoring in the thermal power generation industry. We will continue to adhere to the concept of "customer first, quality first", continuously innovate, provide users with better products and services, and make greater contributions to China's energy saving and emission reduction cause.