The belt coal feeder is liked by many new and old customers because of its stable operation, low noise and environmental protection. The belt coal feeder that is often used is known by all, compared with other coal feeders. The belt of the belt feeder is more prone to minor problems than other parts of the coal feeder. Today, we want to talk about how to prevent the belt from burning.
1. When the coal hopper is empty, the coal must be cut off first. When coal is cut off, it shall be changed according to the air pressure of sealing air.
2. There must be a reliable interlock device at the outlet of the belt coal feeder that can cause the belt coal feeder to trip when the coal feeder is overtemperature. When the temperature rises, the valves of the belt coal feeder and the furnace must be closed in time to prevent the hot air from flowing back.
3. The valves (mostly gate valves) between the belt coal feeder and the furnace shall be flexible at ordinary times.
4. When the belt coal feeder needs maintenance, there must be a reliable manual isolation valve to isolate the coal feeder from the furnace.
5. The coal flow monitoring and protection device can be installed at the lower coal inlet, and a thermocouple can be added in the belt coal feeder for alarm and interlocking. Generally, when coal is added to the coal chute of the boiler, the hot air in the boiler will not flow back to the coal feeder. Once there is no coal in the coal bunker shed or coal bunker, the positive pressure high temperature hot air in the dense phase area of the furnace will return to the coal feeder, and the coal feeding belt will be burnt out if it is not found in time. When the coal flow device monitors that the coal chute is broken, or when the thermocouple finds that the temperature in the coal feeder exceeds the limit, it will alarm and interlock to close the electric gate valve at the outlet of the coal feeder to protect the belt coal feeder.
