In the high-temperature and high-pressure environment of steel metallurgy, the trace moisture in blast furnace gas and converter gas can be regarded as the "invisible killer" of equipment life. When the dew point temperature of gas exceeds the wall temperature of the pipeline, water vapor will condense into liquid water, react with sulfides and chlorides to generate highly corrosive acid, causing pipeline perforation, valve jamming, instrument failure, and even major safety accidents such as gas leakage. As a leading brand in the global humidity detection field, SHAW UK is a global leader in dew point meters. Its online dew point meter has become a core equipment for metallurgical enterprises to prevent corrosion and ensure safety with ± 3 ℃ measurement accuracy and industrial grade reliability.

Corrosion Crisis: The 'Deadly Variable' in Metallurgical Processes

Blast furnace gas and converter gas are key by-products of metallurgical processes, with complex compositions (including CO, CO ₂, N ₂, H ₂ S, etc.) and low moisture content (usually between 50-200ppm), but they pose great harm. In the blast furnace gas pipeline of a large steel enterprise, due to the long-term maintenance of dew point temperature at 45 ℃ (pipeline wall temperature at 40 ℃), the condensed water reacted with SO ₂ in the gas to generate sulfurous acid, resulting in 12 pitting corrosion pits in the DN1200 pipeline within 6 months, forcing it to be shut down for maintenance and direct losses exceeding 8 million yuan. The moisture in the converter gas can also accelerate the scaling of the oxygen lance nozzle, reducing the injection efficiency by 30% and increasing steelmaking energy consumption. Traditional humidity detection relies on manual sampling and analysis, which takes 2-4 hours and cannot capture dew point fluctuations in real time. However, the rapid response capability of the UK SHAW online dew point meter Superdew3 fills this technological gap.

Technological breakthrough: Industrial grade anti-interference, accurate locking of enemy corrosion sources

The UK SHAW online dew point meter Superdew3 is designed specifically for harsh metallurgical conditions, and its core technology directly addresses the pain points of moisture control:

1. Wide range and high accuracy: Using alumina capacitive sensors, the range covers -100 ℃ to+20 ℃, with a measurement accuracy of ± 3 ℃ in the key range of the metallurgical industry (-60 ℃ to+60 ℃), a resolution of 0.1 ℃, and stable recognition of 1ppm level water vapor changes.

2. Anti chemical corrosion design: The sensor probe and filter are both made of 316L stainless steel material, covered with a fine hydrophobic coating on the surface, which can resist corrosive substances such as H ₂ S and Cl ⁻, and extend the service life to more than 5 years.

3. Rapid response and interlocking control: The wet to dry conversion time is short, with a dry to wet conversion time of less than 20 seconds. It supports 4-20mA signal output and can seamlessly interface with DCS systems to achieve automatic interlocking shutdown when dew point exceeds the limit.

Practical effectiveness: reducing costs and increasing efficiency, safeguarding the lifeline of metallurgy

In a blast furnace gas purification system of Baowu Group, the British SHAW online dew point meter Superdew3 is deployed at the inlet of the gas compressor. The system monitors the dew point temperature in real-time and controls the parameters of the gas preheater in a coordinated manner to maintain the pipeline wall temperature stable at 5 ℃ above the dew point. After the renovation, the corrosion rate of the pipeline decreased from 0.8mm/year to 0.2mm/year, reducing maintenance costs by over 3 million yuan per year. In the converter gas recovery project of Hebei Iron and Steel Group, the UK SHAW online dew point meter Superdew3 extended the nozzle scaling cycle from 15 days to 90 days by monitoring gas humidity and optimizing the oxygen lance injection program, saving over 2 million yuan in spare parts costs annually.

From blast furnaces to converters, from pipelines to equipment, the UK SHAW online dew point meter Superdew3 is redefining the corrosion prevention and control standards in the metallurgical industry with its "fine" humidity control capabilities. Its technological evolution not only provides quantifiable risk control measures for enterprises, but also accelerates the transformation of the metallurgical industry towards safety, efficiency, and green direction through data-driven proactive maintenance.