About the use of 50-ton steam boilers, the following is a detailed introduction from the aspects of pre-operation preparation, startup steps, operation monitoring, shutdown operation and daily maintenance:

1. Pre-operation preparation

Check the appearance of the boiler: Make sure the appearance of the boiler is intact, without water leakage, air leakage, etc.
Check the fuel supply: Ensure that the supply of fuels such as liquefied gas and natural gas is sufficient and without leakage.
Cleaning work: Clean the flue and water pipes of the boiler to ensure unobstructed; clean the ash and residue in the furnace.
Check the valve: Make sure that all valves are closed well, especially the safety valve, pressure gauge, water level gauge and other safety devices should be in normal working condition.
Check the steam system: Check whether the various instruments and equipment of the steam system are operating normally.
Check the power supply, voltage, and water source: Ensure that the power supply and voltage are stable and the water supply is normal.

2. Startup steps

Add water: Open the water supply valve and inject water into the steam boiler. At the same time, observe the water level gauge to ensure that the water level returns to the normal water level line. Note that the water quality should be clean and avoid using water with too high hardness.
Start the induced draft fan: introduce air into the furnace.
Ignition and combustion: put in fuel and ignite the burner. A series of checks need to be carried out before ignition, such as opening the fuel system pressure gauge valve and the instrument air system, to ensure that all indicators are normal.
Warm up the pipe and increase the pressure: after starting the steam boiler, first warm up the pipe, then increase the pressure, and then ignite. This process needs to be carried out in sequence and cannot be reversed.

3. Operation monitoring

Real-time monitoring: real-time monitoring of parameters such as steam pressure, water level, and gas concentration, and adjust according to actual conditions.
Drainage: Regularly drain sewage to prevent pipeline blockage. When draining sewage, pay attention to the pressure discharge between 0.1MPa and 0.15MPa.
Keep clean: regularly remove ash and coke in the furnace and smoke pipe of the steam boiler to keep the combustion unobstructed.
Control fuel supply: strictly control the supply of fuel to avoid excessive or insufficient fuel and maintain stable combustion.

4. Shutdown operation

Reduce steam supply: gradually reduce the steam supply and wait for the pressure to drop to a safe range.
Close the valve: Close the main steam valve and water supply valve to stop the flow of steam and water.
Stop combustion: Turn off the burner and stop the supply of fuel.
Turn off the induced draft fan: Stop the entry of air.
Wait for cooling: Wait for the steam boiler to cool down before cleaning and repairing.

5. Daily maintenance

Regular inspection: The boiler and its safety accessories (such as safety valves and pressure gauges) need to be inspected regularly, and equipment that has not been inspected regularly shall not be used.
Safety accessory inspection: The safety valve needs to be calibrated regularly, and the pull rod should be pulled at least once a month to check its flexibility.
Water quality monitoring: Regularly monitor and test the water quality of the boiler to ensure that the water quality meets the requirements. Water treatment and water replenishment operations are carried out when necessary.
Professional training: Operators must be trained and obtain the "Special Equipment Operator Certificate" to ensure that they can operate proficiently and respond to emergencies.
In summary, the use of a 50-ton steam boiler involves many aspects and links, and operators need to have professional knowledge and operating skills. In actual operation, the operating procedures and safety systems should be strictly followed to ensure the safe and efficient operation of the boiler. At the same time, it is also necessary to strengthen daily maintenance and maintenance work to extend the service life of the boiler and improve economic benefits.