High-temperature combustion machine utilizing boiler flue gas waste heat for air preheating, also known as high-temperature burner, high-temperature gas combustion machine, air preheating combustion machine, boiler high-temperature combustion machine, boiler high-temperature burner, energy-saving high-temperature burner, boiler flue gas waste heat recovery, gas boiler energy saving, gas waste heat recovery, boiler energy saving, air preheating, energy-saving 4-10% burner.

In recent years, energy shortages and rising fuel costs have significantly increased operational expenses across various industries! Energy conservation and emission reduction have become key goals for corporate reform, with waste heat recovery and utilization being the top priority. However, most conventional burners cannot withstand excessively high temperatures, limiting the recovery and utilization of flue gas waste heat. We

have dedicated extensive efforts to developing a full series of high-temperature-resistant air preheating combustion machines: air preheating oil burners, air preheating gas combustion machines, and air preheating dual-fuel (oil/gas) combustion machines. We have developed combustion systems focused on energy conservation and emission reduction, with numerous successful applications to date, earning high praise from users.     

Industrial processes often discharge waste high-temperature exhaust gases of 200-300°C or more from chimneys. Conventional combustion systems primarily use ambient-temperature air for combustion support. If the combustion air temperature can be increased by over 100°C, fuel consumption can be relatively reduced, lowering costs by 4-6%. We install air preheating systems at chimney outlets, significantly increasing the boiler's intake air temperature. This technology

enhances combustion efficiency, improves combustion conditions, reduces chimney exhaust temperature, decreases emissions, and saves approximately  (4-10%) energy.

Air preheating burners are high-temperature-resistant combustion machines with intake air temperatures as high as 150°C. They are fully automated, load-adjustable forced-draft burners that can use liquid (oil) or gaseous (gas) fuels.

Air preheating burners are also energy-saving burners that effectively conserve fuel and reduce exhaust gas temperatures. Combustion air is drawn from the environment (ambient temperature: 20°C~30°C) and preheated using waste heat from combustion flue gases via heat exchangers. Preheated air mixed with fuel improves combustion efficiency and quality, effectively saving fuel (a 100°C increase in combustion air temperature saves approximately 3.9% energy) while reducing exhaust gas temperatures and carbon emissions.

Air preheating burners operate on the same principle as conventional fully automated forced-draft oil, gas, or dual-fuel burners, with the key difference being the use of flue gas (waste gas) waste heat to preheat combustion air.

Typical air preheating burners have combustion air temperature ranges from 50°C to 250°C, with個(gè)別 cases exceeding >300°C.

As combustion air density decreases with increasing temperature, the air/fuel flow ratio of air preheating burners differs from that of conventional forced-draft (ambient temperature) burners. Conventional forced-draft oil or gas burners draw combustion air from the environment (ambient temperature), mix it with fuel, and combust at temperatures >1000°C to heat the medium within thermal energy equipment. After combustion, high-temperature flue gases (waste gases) are discharged into the atmosphere through chimneys, polluting the environment.

For example:

1. Steam boilers: medium temperature ~160°C; flue gas temperature ~250°C

2. Thermal oil heaters (heat medium boilers): medium temperature ~300°C; flue gas temperature ~380°C

Such equipment discharges significant amounts of thermal energy through flue gases (waste gases). Effective thermal energy recovery solutions can conserve energy.

Installing flue gas/air heat exchangers at the exhaust outlets of such equipment reduces exhaust gas temperatures while increasing combustion air temperatures, thereby saving fuel. However, the condition is that the burner must be high-temperature-resistant.

Notes:

1)  The combustion air required for natural gas = 1.234 (kg/hr)/kW (theoretical air-fuel ratio, λ=1.0); during operation (λ=1.15), the combustion air required for natural gas ≈ 1.419 (kg/hr)/kW

2) For every 100°C increase in combustion air temperature, fuel savings of approximately 3.9% can be achieved, while also reducing carbon emissions (calculated based on natural gas combustion) by approximately 0.05 (kg/hr)/(°C-M