The key of condensing boiler lies in condensation technology, which is a new energy-saving and environmental protection technology. Its principle is not complicated, and the simple summary is to recover the heat energy in the flue gas by condensing the flue gas. In traditional boilers, the flue gas temperature is generally 160 ~ 250 ℃, or even higher, which makes the water (such as natural gas: CH4 + 2O2 → CO2 + 2H2O) generated during fuel combustion in the flue gas in the superheated state, and the water vapor will be lost from the chimney along with the flue gas. The thermal efficiency of traditional boiler can only reach 85% ~ 91%. The condensing gas-fired boiler reduces the exhaust gas temperature to 50 ~ 70 ℃, fully recovers the sensible heat in the flue gas and the condensation latent heat of steam, and greatly improves the thermal efficiency.
Working principle of condensing gas fired boiler
Generally speaking, the working principle of the condensing gas-fired boiler is to recover the energy from the hot flue gas (generally about 140 ℃) after combustion of the boiler through a certain device. After recovery, the exhaust gas temperature is only about 60 ℃. In this way, the thermal efficiency is about 10%, which naturally saves about 10% of the gas. Meanwhile, in the process of energy recovery, it can also reduce harmful gas To reduce environmental pollution.
Key points of condensing gas fired boiler
The core of condensation technology is to reduce the heat loss of fuel combustion, and effectively absorb the heat energy generated by fuel. At the same time, due to the condensation of flue gas, harmful substances in flue gas are collected into condensate water, which reduces the emission of acid substances and other pollutants into the air. More advanced condensing gas-fired boilers use smokeless combustion technology, which reduces the emission of nitrogen oxides (NOx can cause acid rain and greenhouse effect) to more than 35 mg / kWh.
Condensation technology is an energy-saving and environmental protection way of natural gas heat energy conversion. In 2010, the use of solar energy in high-rise buildings and the integration of flat-panel solar energy and buildings were well solved. It is a good combination of household boiler and solar energy. Environmental protection and energy saving also make users more comfortable and convenient.
Graphical calculation principle of thermal efficiency
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