Guide: The steam boiler is a pressure vessel. The boiler pressure, water level and temperature are the three elements of safety. It needs to be controlled within the specified range to ensure its safe operation.

The steam boiler is a pressure vessel. The boiler pressure, water level and temperature are the three elements of safety. It needs to be controlled within the specified range to ensure its safe operation.

1. Overpressure of steam boiler

　　1. The air pressure rises sharply, exceeding the permitted working pressure, the pointer of the pressure gauge exceeds the permitted working "red line", and the pressure is still rising after the safety valve is actuated.

　　2. Send out an overpressure alarm signal, and the overpressure interlock protection device will act.

　　3. The steam temperature increases and the steam flow decreases.

2. Overpressure treatment of steam boiler

　　1. Quickly weaken the combustion, and manually open the safety valve or the steam release valve.

　　2. Increase the water supply, and at the same time strengthen the blowdown in the lower steam drum (at this time, pay attention to maintaining the normal water level of the boiler) to reduce the boiler water temperature, thereby reducing the boiler drum pressure.

　　3. If the safety valve fails or all the pressure gauges are damaged, the furnace should be shut down urgently, and the pressure should be increased after the safety valve and pressure gauge are repaired.

　　4. When the boiler is overpressured and the safe operation is endangered, pressure reduction measures should be taken, but it is strictly forbidden to reduce the pressure too fast.

Xinli gas-fired steam boiler adopts PLC control system with complete interlocking and linkage functions. It has interlocking and linkage functions such as extremely low water level alarm, ultra-high pressure alarm, and ultra-high smoke temperature shutdown. The operation is safe and stable, and can shield all risks. The operation is absolutely safe.