Guide: There are many places where boilers are used in textile mills, such as spinning mills for boiling pulp, coating plants for heating and drying, etc. Different production processes use steam boilers for different purposes. How to choose a textile factory boiler? What are the safety protections of gas steam boilers?
There are many places where boilers are used in textile mills, such as spinning mills for boiling pulp, coating plants for heating and drying, etc. Different production processes use steam boilers for different purposes. How to choose a textile factory boiler? What are the safety protections of gas steam boilers?
1. How to choose a boiler in a textile factory
Textile enterprises use steam boilers, because the dyeing and finishing, drying, tableting, shaping, etc. of textile enterprises are inseparable from the heat source (steam) provided by thermal equipment. The use of steam boilers in textile mills must determine the evaporation capacity, rated working pressure and steam temperature of the steam boiler. As for the boiler fuel, users can decide based on local environmental protection requirements and fuel resources. The price of the boiler is determined by the quality of the main boiler and auxiliary equipment and the service of the manufacturer.
2. what are the safety protections of gas steam boilers
1. Water level protection
gas steam boiler is equipped with two water pumps, running and standby. The boiler is equipped with one or two plate-type water level gauges and should be compared with each other frequently. If the indications are found to be inconsistent, they must be corrected immediately. The water level gauge should be flushed every shift to determine its true water level. At the same time, it is also equipped with an electrode point water level balance cylinder, which can accurately collect water level signals to send out an alarm or perform feedwater pump control.
2, pressure protection
When the boiler pressure exceeds the rated value, interlock protection is required: the method is to stop the boiler and the combustion system stops working; the burner can also be changed, single-stage or double-stage combustion, and the oil volume can be adjusted to reduce the pressure and ensure the safe operation of the boiler. The pressure protection of the fuel (gas) steam boiler is the same as the water level, with multiple protections.
Commonly used pressure controllers and electric contact pressure gauges can alarm the steam pressure overpressure, and cut off the burner when the limit is reached; the pressure controller adjusts single-fire or double-fire combustion according to the actual operating pressure; for large-scale burners, it can be adjusted according to the pressure The amount of fuel always maintains stable operation under pressure.
The safety valve is the last line of defense in boiler protection. When the boiler pressure exceeds the limit, the pressure is discharged according to the set pressure of the safety valve design to ensure the normal operation of the boiler.
3, temperature protection
Temperature protection is an important procedure in the safe operation of the boiler. It is particularly important for the regulation and protection of the temperature of the steam boiler; at the same time, it can achieve regulation and protection when the hot water boiler is over-temperature. The temperature protection device commonly used in boilers is a bimetallic temperature controller.
4, flameout protection
To prevent the occurrence of furnace explosion events, oil (gas) boilers must be equipped with flameout protection devices. The function is to monitor the combustion situation in the furnace (including ignition. When the ignition fails or the combustion is extinguished in the middle, it is generally re-ignited within 5 seconds, within 1 second) Run, close the oil (gas) solenoid valve, turn on and send out an audible and visual alarm signal. At this time, the blower continues to run to purge the remaining combustible gas in the furnace. After 20 to 30 seconds of purging, the blower is automatically cut off And various auxiliary power supplies, the boiler stops running.) Consists of a flame monitor and a control device. The function of the flame monitor is to signal the presence or interruption of the flame from the control device.
5, power failure self-locking protection
In the event of sudden power interruption, the boiler operation will stop and self-lock immediately. If the current is restored to power, it will start at any time, and the self-lock must be reset to release the self-lock before the ignition can be restarted.
The selection method of the textile factory boiler and the introduction of the safety protection method of the gas steam boiler are introduced above. The gas steam boiler is a pressure vessel, and its safe operation is very important. The safe operation of gas-fired steam boilers mainly depends on the boiler pressure, water level, and temperature being controlled within a safe range to ensure the safe and stable operation of the boiler.