The thermal cracking reaction of the boiler introduces that the boiler should be carefully introspection, waterproof, acid, alkali and low boiling point leakage into the application system, the system should be equipped with filtration installation to avoid all kinds of debris entering, enveloping the purity of oil. It is easy to be oxidized in the process of heating, and the acid value of oil increases and the rate of change is large at high temperature. The kinematic viscosity of the boiler increases gradually, which is due to the thermal cracking and condensation reaction of the components at high temperature. The pyrolysis results lead to the formation of small molecular compounds and decrease their viscosity; when the operating temperature is 300? 400 ℃, the pyrolysis occurs easily, and carbon deposition occurs in the inner wall of the pipe and equipment, which results in the heat accumulation of the pipeline affecting the heat transfer. Efficiency, poor fluidity of oxidized oil slime in pipeline, accelerated aging failure of conductive oil, local overheating of furnace body and pipeline, endangering mechanical strength and endangering personal safety.
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Introduction condensing boiler: condensing boiler efficiency is the use of flue gas condensation heat recovery boiler to absorb latent heat from exhaust tail and the sensible heat released by condensation of water vapor, to achieve the purpose of improving the thermal efficiency of the boiler. Thermal efficiency of the condensing boiler Analysis: conventional boiler, the exhaust gas temperature is generally 160 ~ 250 ℃, water vapor in the flue gas is still in a superheated state, it can not be condensed into liquid water and release latent heat of vaporization. As we all know, the thermal efficiency of the boiler low calorific value fuel is calculated without considering the heat loss of latent heat of vaporization of fuel in the high heating value. Thus the thermal efficiency of the conventional boiler generally only 87% to 91%. Waste heat recovery boiler is condensed, to which the exhaust gas temperature is reduced to 50 ~ 70 ℃, full recovery of the latent heat of condensation and sensible heat in the flue gas water vapor. Flue gas-fired condensing heat recovery single drum industrial steam boiler price for sale flue gas volume components typically produce 15% to 19%, the water vapor content of the oil-fired boiler flue gas is 10% to 12%, much higher than in coal-fired boiler water vapor content below 6%. Currently the thermal efficiency of the boiler are low calorific value calculation, although nominally higher thermal efficiency, but because of high natural gas, low calorific value difference of about 10%, the actual energy efficiency to be increased. To take full advantage of energy, reduce exhaust gas temperature, flue gas heat recovery physical, when the wall surface of the heat exchanger flue gas temperature below the dew point temperature, water vapor in the flue gas will be condensed, releases latent heat, low and high 10% calorific value difference can be effectively utilized.
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