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
- 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.
- The excessive air coefficient. Under normal circumstances, with the increase of excess air coefficient at furnace outlet, the temperature of boiler exhaust gas increases.
- 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.
- 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 FAQs
View More
Related products
View More
-
SZS series gas-fired (oil-fired) steam boilerLive Chat2-110 t/h1.25-5.3 MPa
-
WNS series gas-fired (oil-fired) steam boilerLive Chat1-20 t/h0.7-2 MPa
-
DZL series coal-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
By boiler medium
By boiler structure
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat

Related news
View More
-
South America is rich in agricultural and energy resources and has a diverse manufacturing base. Industries such as papermaking, packaging and sugar processing are upgrading their production equipment as market and environmental requirements evolve. For these companies, a boiler is more than a steam source. Its performance affects production continuity, fuel consumption, process quality and emissions management. Through projects in Venezuela, Brazil and Ecuador, ZOZEN Boiler has continued to ex...21 Jul 2026 -
As the 2026 FIFA World Cup brings the United States, Mexico and Canada into the international spotlight, attention is once again turning to the cities, industries and communities across North America. Away from the stadiums, manufacturing plants, beverage production lines and automotive component facilities continue their daily operations, providing steady support for local economies. ZOZEN Boiler’s WNS Series Serving Industrial Projects in North America In these less visible parts of ...14 Jul 2026 -
At the production site of a pharmaceutical company in Shanghai, a ZOZEN gas-fired steam boiler commissioned in 2010 has been operating steadily for 16 years. For this established pharmaceutical company, founded in 1995, the steam system is closely related to production rhythm, process coordination, and on-site operation support. Whether the equipment can maintain stable operation over the long term directly affects the continuity of daily production. Time is a practical test, and the continuous ...07 Jul 2026
Latest cases
View More
Find the Right Boiler For You
Related photos
View More











