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| Analysis and Improvement of Water Leakage in AQC Boiler for Cement Kiln Waste Heat Power Generation |
| Sinoma Energy Conservation Ltd. , Tianjin 300499, China |
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Abstract Water leakage accidents in cement kiln waste heat power generation AQC boilers can easily lead to their failure and shutdown, affecting the safe and stable operation of steam turbines and cement production lines. It analyzed the common risks of wear leakage, corrosion leakage, and thermal fatigue leakage caused by alternating cold and hot stresses in the superheaters of AQC boilers. Taking the single pressure system AQC boiler of a certain project as an example, multiple experimental analyses were conducted on the sampling of the outlet header of the high-temperature superheater and the spray pipe of the desuperheater that experienced water leakage. The results showed that the main cause of superheater leakage was thermal fatigue leakage caused by alternating cold and hot stresses, and the main cause of desuperheater nozzle cracking was corrosion fatigue. Based on the experimental results, the leaking equipment was replaced, and design optimization schemes were proposed to enhance the adaptability of the boiler, optimize the steam drum and water separator, strengthen boiler wear prevention, and reduce stress concentration in welding parts. By adopting multiple measures such as strict control of welding quality, strengthening of equipment manufacturing process quality control and on-site equipment construction quality supervision and inspection, and improving boiler operation management level, the high leakage risk of the AQC boiler superheater can be effectively prevented, ensuring the long-term stable operation of the AQC boiler.
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Received: 01 May 2024
Published: 25 January 2025
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