Why do thermal power plant boiler water tests for dissolved oxygen need trace levels?This is because according to GB12145-2016 "Water Vapour Quality Standards for Thermal Power Generating Units and Steam Power Equipment", the dissolved oxygen content of boiler feed water for AVT process is required to be ≤7ppb; and that of boiler feed water for OT process is required to be 10~150ppb.These standards emphasise the need for dissolved oxygen levels to be controlled at trace levels.The control of dissolved oxygen in boiler water in thermal power plants is a very important aspect, mainly because trace levels of dissolved oxygen can cause serious corrosion problems in boiler systems.Here are a few key reasons why dissolved oxygen needs to be controlled at trace levels:
1. Corrosion prevention: Dissolved oxygen is one of the main causes of corrosion of metallic materials inside boiler systems.Even very small amounts of dissolved oxygen can cause oxidation reactions in materials such as steel, resulting in rust, which not only reduces the service life of the system, but can also lead to problems such as blocked or leaking pipes.
2. Improved efficiency: As unit capacity and parameters have increased, standards for dissolved oxygen in boiler feed water have become more stringent.Corrosion products may be deposited on heat exchangers and other heat transfer surfaces, forming an insulating layer, which reduces heat transfer efficiency, increases energy consumption and ultimately affects power generation efficiency.
3. Protection of water quality: high levels of dissolved oxygen may also react with water treatment chemicals (such as corrosion inhibitors), affecting the effectiveness of these chemicals, which in turn affects the stability and effectiveness of the entire water treatment system.
4. Compliance with standards: The power industry usually has strict standards and codes to ensure the safe operation and long life of equipment.For dissolved oxygen concentrations in boiler water, these standards often require very low levels to ensure reliable long-term system operation.
Micro Dissolved Oxygen Tester adopts advanced sensor technology and electrochemical polarographic principle, which can accurately measure micro dissolved oxygen content with high sensitivity and accuracy.This high-precision and high-sensitivity testing instrument can ensure the accuracy and reliability of the dissolved oxygen testing of boiler water in thermal power plants, and provide powerful technical support for water quality management and equipment protection in thermal power plants.
ERUN-SP3-A5 Portable Dissolved Oxygen Analyser for Water Quality，Created by Erun Environmental Protection, it incorporates cutting-edge design concepts and cutting-edge technology.Known for its excellent measurement accuracy and outstanding stability, the instrument is widely used in thermal power plants, chemical industry, metallurgical field and environmental protection monitoring and other industries.It can accurately analyse the content of trace dissolved oxygen in boiler make-up water and steam condensate, providing strong technical support for water quality monitoring.
Trace levels are required for dissolved oxygen testing of boiler water in thermal power plants in order to protect the equipment from oxygen corrosion, to improve measurement accuracy, and to comply with industry standards.By accurately controlling the dissolved oxygen content, you can ensure the safe and stable operation of the boiler and related equipment, prolong the service life of the equipment, and improve the efficiency of power generation.
