Multiple protection of natural gas steam boilers

- Sep 30, 2019-

(1) Boiler water level protection

One to two plate water level gauges for boilers should be compared with each other frequently. If the indications are inconsistent, they must be corrected immediately. The water level gauge should be flushed per shift to determine its true water level. At the same time, it is equipped with a water level electrode rod, which can accurately collect the water level signal to issue an alarm or control the feed pump.

(2) Steam pressure protection

Pressure controller: The high-sensitivity pressure controller is selected to transmit signals with high and low pressure to the electrical switch, and to automatically control or interlock the other control lines. The pressure controller and the electric contact pressure gauge can be used to make the steam pressure overpressure alarm; the pressure controller can regulate single or double fire combustion according to the actual operating pressure. Safety valve: The safety valve is the last line of defense in the boiler protection. When the boiler pressure exceeds the limit, according to the calibration pressure of the safety valve design, the steam is released to ensure the normal operation of the boiler.

(3) Flameout protection

The imported burner has a flameout protection device, and the function is to detect the combustion condition. When the ignition fails or the combustion is extinguished, the burner immediately closes the oil (gas) solenoid valve, and the blower continues to operate, purging the residual combustible gas in the furnace, After 20 to 30 seconds of purging, the blower and various auxiliary machines are automatically turned off, and the boiler stops running.

(4) Power failure self-locking protection

In the case of sudden power interruption, the boiler is immediately shut down and self-locked. If the current is restored, the boiler will not start at any time. It must be reset and unlocked to restart the ignition.