One of the common types of boilers used in fuel-fired boilers, the following is a brief analysis of the use of the small-scale, "Oil Fired Steam industrial boilers Prices For Steam Supply"
The supply of gas-fired boilers depends on the thermal efficiency of the boiler, the maintenance cycle of the boiler, the frequency of failure of the boiler, etc.
When the fuel quantity is fixed: After the feed water temperature is high, the economizer temperature will drop, the economizer outlet flue gas temperature will also increase, the preheater heat absorption will increase, the exhaust gas temperature will increase, and the boiler thermal efficiency will decrease. Therefore, it can be seen that the temperature of the feed water is increased, and the amount of evaporation is increased when the amount of fuel is constant, but the thermal efficiency of the boiler is lowered.
Therefore, if you want to improve the thermal efficiency of gas boilers, you need to reduce the warmth of the feed water.
When the evaporation amount is constant: If the feed water temperature is increased, the economizer will reduce the heat transfer temperature difference, the heat absorption will decrease, the economizer smoke temperature will increase, and the air preheater temperature will increase. At the same time, the amount of heat transfer increases, the temperature of the hot air is slightly increased, and the temperature of the exhaust gas is increased to lower the efficiency of the boiler.
However, after the temperature of the feed water is increased, the amount of heat used for evaporation increases. In order to maintain the amount of evaporation, the amount of fuel should be reduced. At this time, the exhaust gas temperature is lowered and the thermal efficiency of the boiler is increased.
However, since the influence of these two factors on the thermal efficiency of the boiler is roughly the same, when the boiler evaporation amount is kept constant, the feed water temperature increases the boiler thermal efficiency substantially unchanged. It can be seen that the different conditions have different thermal efficiencies for the gas steam boilers used in the winery.
As for the maintenance cycle, that is to say, the boiler should clean the corrosive substances and scale in time after the operation stops, so as to avoid the long-term accumulation, affecting the operation safety of the boiler, and the efficiency.
