zozen boiler
Home Service FAQs Boiler basics What are the reasons for the rising temperature of boiler exhaust gas?

What are the reasons for the rising temperature of boiler exhaust gas?

29 Oct 2021
  1. Coking and dust accumulation on heating surface. Whether it is slagging and ash deposition on the water wall of the furnace or ash deposition on the superheater, convection tube bundle, economizer and preheater, the measured thermal resistance of flue gas will increase, and the deterioration of heat transfer will worsen the cooling effect of flue gas, resulting in an increase in the temperature of boiler waste gas.
  2. The excessive air coefficient. Under normal circumstances, with the increase of excess air coefficient at furnace outlet, the temperature of boiler exhaust gas increases.
  3. Excessive air leakage coefficient. Air leakage refers to furnace air leakage and flue air leakage, which is one of the main reasons for the temperature rise of boiler exhaust gas.
  4. Feed water temperature is too high. The heat transfer temperature difference between flue gas temperature and water temperature is small, which makes the temperature of boiler exhaust gas rise correspondingly.
Related news View More
  • ZOZEN Boiler’s Drouble Drum Biomass Boiler Debuts with a Renewed Exterior
    When an industrial boiler arrives on site, what first catches a customer’s attention is often not the specification sheet, but the overall appearance of the equipment in the plant environment. For boiler equipment, exterior design is not only about visual presentation; it also reflects the manufacturer’s approach to product details, on-site management, and brand image. ZOZEN Boiler has upgraded the exterior of its SZL series biomass boiler, presenting a more unified visual design and...
    19 May 2026
  • ZOZEN Boiler Concludes Its Participation at PALMEX JAKARTA 2026
    From May 6 to 7, 2026, PALMEX JAKARTA 2026, the International Palm Oil Industry Equipment Exhibition, was held at JIEXPO in Jakarta, Indonesia. At booths 190 & 192, ZOZEN Boiler presented its boiler products and thermal energy solutions for industries such as palm oil processing. During the two-day exhibition, ZOZEN welcomed multiple groups of visitors, including existing clients and new prospects. Some new visitors returned to the booth several times for further discussions, and the overall...
    12 May 2026
  • ZOZEN Expands in Ecuador’s Paper Industry with Heavy Oil Steam Boiler Project
    ZOZEN Boiler has recently shipped a 10-ton WNS series heavy oil steam boiler to Ecuador, where it will support the production line of a local corrugated board packaging company. The project marks another step in ZOZEN’s expansion in Ecuador’s paper industry and reflects growing demand in South America for reliable steam supply, fuel adaptability, and after-sales support. ZOZEN WNS series heavy oil condensing steam boiler Stable steam supply matters in paper productionIn paper and...
    05 May 2026

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity