Boiler operating cost per hour and operating efficiency, fuel calorific value is relatively large, fuel calorific value according to the type of fuel selected by users, is a fixed value;Therefore, the operation efficiency becomes an important value to determine the boiler operation cost.To put it simply, the higher the efficiency of the boiler operation, the lower the operating cost, and the more economical.
The thermal efficiency of gas hot water boilers launched by Zhengzhou Fangkuai Boiler Plant is above 98%, and the operating cost of 6 tons hot water boilers per hour is between 800-850 yuan.
When the load of gas hot water boiler increases, without adjustment, because of the constant fuel volume, steam production is less than the volume of steam, steam pressure is bound to decline.The saturation temperature of the boiler water decreases accordingly, and some of the heat stored in the water and metals vaporizes part of the boiler water, producing a small amount of steam to compensate for the increase in load.The steam stored in the space of the drum expands as the vapor pressure drops, thus slowing down the decline of the fuel before the pressure is increased.On the contrary, when the steam production is greater than the load, on the one hand, the excess steam is stored in the form of compression in the steam space of the drum, on the other hand, the excess heat is stored in the form of increasing the saturation temperature of furnace water and metal temperature, thus slowing down the speed of steam pressure rise.Drum boilers have high heat storage capacity and strong ability to automatically adapt to load changes, which is their advantage.
When the change of steam pressure is adjusted actively, the speed of the steam pressure returning to normal is also slower due to the same reason, which is the negative side.Grasping this characteristic of drum boiler is very useful to adjust the load correctly and keep the steam pressure stable.For example, manual adjustment of steam pressure, such as found that the steam pressure drop, boiler steam production is less than the load, to increase fuel in time.If the steam pressure stops falling, it means that the steam production and load have reached a balance on a new basis.More fuel is needed to restore the original steam pressure.In the same way, when the steam pressure rises, the fuel should be reduced in time until the steam pressure stops rising and returns to normal.
Because the heat storage capacity of the drum boiler is higher, the steam pressure changes slowly after the fuel increase and decrease, so the steam pressure changes should be adjusted in time, rather than when the pressure exceeds the specified upper and lower limits and then adjusted, so as to maintain the steam pressure of the boiler is relatively stable.
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