Slag inlet pipe provided with slag leaking prevention protection device and slag leaking prevention protection method of slag inlet pipe

Abstract

The invention discloses a slag inlet pipe provided with a slag leaking prevention protection device and a slag leaking prevention protection method of the slag inlet pipe. The device comprises the slag inlet pipe, a slag receiving trough, a temperature sensor, air nozzles, a compressed air source, an alarm device and a controller. The protection method comprises the steps that a first temperatureset value and a second temperature set value are preset in the controller, the temperature sensor monitors the temperature value in the slag receiving trough, and the monitored temperature value is transmitted to the controller; and the controller carries out logic judgment, and whether the monitored temperature value reaches the first temperature set value or the second temperature set value or not is judged. The slag inlet pipe and the protection method have the beneficial effects that the structure is simple, and implementation is easy; the accidents of personnel scalding, fire accidents and forced furnace shutdown are effectively avoided; and normal running of a fluidized bed boiler is guaranteed, production efficiency is guaranteed, and cost is reduced.

Description

Technical field: [0001] The patent of the present invention belongs to the field of industrial safety, and specifically relates to a slag feeding pipe provided with an anti-leakage slag protection device and an anti-leakage slag protection method thereof. Background technique: [0002] Circulating fluidized bed boilers are widely used due to their high reliability, high stability, high availability, and wide fuel adaptability; circulating fluidized bed boilers burn coal to produce ash, and some fine ash is brought to The tail flue of the boiler is discharged into the atmosphere after dust removal, and another part of the large particle ash is discharged through the lower part of the furnace. Sliding plate door; the ash and slag discharged from the lower part of the furnace of the circulating fluidized bed boiler with a temperature of 850 ℃ ~ 950 ℃ passes through the slag feeding pipe and enters the slag cooler to cool, and then enters the slag conveying system and is dischar...

AI Technical Summary

Problems solved by technology

[0002] Circulating fluidized bed boilers are widely used due to their high reliability, high stability, high availability, and wide fuel adaptability; circulating fluidized bed boilers burn coal to produce ash, and some fine ash is brought to The tail flue of the boiler is discharged into the atmosphere after dust removal, and another part of the large particle ash is discharged through the lower part of the furnace. Sliding plate door; the ash and slag discharged from the lower part of the furnace of the circulating fluidized bed boiler with a temperature of 850 ℃ ~ 950 ℃ passes through the slag feeding pipe and enters the slag cooler to cool, and then enters the slag conveying system and is discharged into the slag bin; for slag feeding For pipes, 0Cr25Ni20 pipes are generally used, which can withstand high temperatures of 1200 ° C, and the normal operating temperature is between 850 ° C and 950 ° C. Usually, due to the influence of wear and alternating stress, the slag inlet pipe often wears, cracks, and leaks red slag. , the leakage of red slag above 800°C is very likely to cause environmental pollution and even burn the staff; at present, manual inspection is mainly used for slag leakage from the slag inlet pipe of the slag cooler. There are hidden dangers in the work; for the slag leakage of the slag inlet pipe at the lower part of the sliding door, it is found that the sliding door can be closed in time for isolation treatment, but when the slag feeding pipe at the upper part of the sliding door leaks, it cannot be isolated, which is likely to cause production ACCIDENT

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