A boiler hood used in the field of power plants

Abstract

The invention belongs to the technical field of hoods, and in particular relates to a boiler hood used in the field of power plants, which includes a hood cone cover, a hood cover, a hood hole, and an actuator, wherein the turbine drives the rotating shaft to rotate after being blown by the wind, and the scroll spring is compressed and stored. Can; after the wind blows and rotates the turbine, the lead screw in the anti-blocking mechanism can be separated from the hole of the wind cap quickly, so that the wind cap can be ventilated normally. After the wind cap stops blowing, the scroll spring releases energy; the design of the friction arc plate in the speed change mechanism can limit the rotation speed of the rotating shaft, thereby realizing the effect of slowing down the release speed of the scroll spring, ensuring that the rotating shaft passes through the first bushing, connecting The plate and gear ring drive the ring to rotate at a slow speed; the lead screw in the anti-blocking mechanism can slowly pass through the hood hole in a rotating manner, which ensures that the lead screw can discharge the high-temperature small particles of coal in the hood hole, ensuring It ensures that the high-temperature small particle coal near the outside of the hood hole will not enter into the hood hole, and finally avoids the situation that the hood hole is blocked.

Description

technical field [0001] The invention belongs to the technical field of air caps, in particular to a boiler air cap used in the field of power plants. Background technique [0002] At present, there is a circulating fluidized bed boiler in a power plant, and many wind caps need to be arranged at the bottom of the furnace to ensure that the pulverized coal in the furnace can be burned in a boiling state. There are many shapes of hoods. For the hood that resembles a mushroom, the upper end of the hood is closed, and the lower end is processed into a plug so that it can be installed vertically at the bottom of the furnace. The center of the hood is hollow and under the edge of the head On the circumference, open a row of ventilation holes. When the boiler is shut down, the hood no longer exhausts the air, and the high-temperature small particle coal is piled up at the bottom of the furnace under the action of gravity. When a boiler coking accident occurs, the boiler needs to b...

AI Technical Summary

Problems solved by technology

When a boiler coking accident occurs, the boiler needs to be shut down in an emergency, and the air cap will stop ventilation soon, so a large amount of high-temperature small-particle coal in a glued state will easily enter the air cap hole, and after the high-temperature small-particle coal is cooled And after sticking to each other, a relatively large cinder group will be formed, which will block the hole of the air cap, causing a lot of trouble to check the blockage of the air cap in the later stage

In addition, when all the holes of the wind cap are completely blocked by the coke blocks after the cooling of large particles, the wind cap will not be able to continue to be used

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