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
  • Another Success in Indonesia: ZOZEN Boiler Boosts Production and Efficiency for Palm Oil Mill
    On the edge of the tropical jungles of Sumatra, Indonesia, the hum of machinery blends with the scent of palm fruit, painting a busy picture of the local palm oil processing industry. As a key global production base, Indonesian oil processing enterprises have a high dependency on reliable thermal energy supply. Booming Oil Processing Industry in Indonesia Recently, Wuxi ZOZEN Boiler Co., Ltd. ("ZOZEN Boiler") successfully delivered and commissioned a 15 t/h SZL series coal-fired steam boiler...
    03 Feb 2026
  • ZOZEN Gas Hot Water Boilers: The High-Efficiency Core Powering Clean Heating Projects in Northern China
    As clean heating upgrades continue to accelerate across northern China, high-efficiency and environmentally compliant heating equipment has become essential to ensuring winter heating security while supporting the country’s carbon reduction goals. In Tianjin, several large district heating companies have independently selected the same core solution — the ZOZEN SZS series gas-fired hot water boiler — delivering stable heat throughout the winter while contributing to improved ai...
    27 Jan 2026
  • ZOZEN Boiler Empowers the Rare Earth Capital High-Quality Development with High-Efficiency Thermal Oil Solutions
    The Regulations on the Administration of Rare Earths, effective from October 1, 2024, are accelerating the rare earth industry’s standardized and intensive transformation under the framework of resource protection, compliant governance, and green development. As demand for rare-earth permanent magnet materials from sectors such as new energy vehicles, wind power, and intelligent manufacturing stabilizes and improves, industry sentiment is rebounding. As the “World Capital of Rare Ear...
    20 Jan 2026

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity