For the traditional coal-fired boilers, the boilers are a job that must be equipped. They not only need to ensure the safety of the coal-fired boilers, but also need to maintain the operation of the boilers. However, the new Shandong gas boiler has been operated all-weather unattended through the automatic control system, so how to achieve it?
In boilers with automatic control system, temperature sensors are installed. These sensors are equivalent to our eyes when they work. They are responsible for transferring the operation of the boiler to the controller on the boiler by means of data. For example, there is a boiler set working temperature of 55 C, the temperature sensor in the boiler when the boiler is running collects the water temperature in the furnace at 40 C. After the temperature data is sent to the controller, the control judges that the temperature is far from the set temperature, so the controlled burner continues to heat the water in the boiler in the state of a big fire.
As the boiler continues to operate, the temperature sensor also continuously collects temperature data and transmits it to the controller. With the heating temperature of the burner gradually rises to 53 degrees. At this time, the controller judges that the water is close to the set temperature by comparing the set temperature with the current temperature, and then controls the burner to reduce the flame. With the temperature approaching the set temperature of 55 C, the frequency converter burner can fine control the flame size according to the actual heat demand, and by gradually approaching, the temperature can be maintained at 55 C. When the heat demand changes, the flame will change accordingly, so that the boiler only works in the state of maintaining temperature.
Traditional boilers generally use three-stage fire (big fire, medium fire and small fire). For some cases, the heat demand is just larger than that of medium fire, but far from the point where large fire heating is needed. At this time, the controller will continue to use large fire heating. At this time, the temperature will rise rapidly and soon exceed the set temperature. At this time, the controller detects that the water temperature has exceeded the temperature, so the burner is controlled by a small fire. However, the small fire can not meet the heat demand, at this time the boiler water temperature will drop, when it drops to a certain extent, the controller will turn the small fire into the big fire heating. Compared with frequency conversion control, this method not only fluctuates in temperature, but also wastes gas in air combustion.
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