Boiler funnel cap used in power plant field

Abstract

The invention belongs to the technical field of funnel caps, and particularly relates to a boiler funnel cap used in the power plant field. The boiler funnel cap comprises a funnel cap conical cover,a funnel cap sleeve, funnel cap holes and an executing mechanism, a turbine drives a rotation shaft to rotate after being blown by wind, and volute spiral springs are compressed to store energy; and after the turbine is blown by wind to rotate, lead screws in an anti-blocking mechanism can be quickly separated from the funnel cap holes, and the funnel cap can be normally ventilated. After the funnel cap stops being blown by wind, the volute spiral springs release energy; the rotating speed of the rotation shaft can be limited through design of frictional arc-shaped plates in a gear shifting mechanism, then the effect of decreasing the releasing speed of the volute spiral springs is achieved, and it is guaranteed that the rotation shaft drives loop sleeves to rotate at low speed through a first shaft sleeve, connecting plates and a gear ring; and in addition, the lead screws in the anti-blocking mechanism can slowly penetrate through the funnel cap holes in a rotating mode, therefore, it is guaranteed that the lead screws can extrude out high-temperature small-particle coal in the funnel cap holes, it is guaranteed that high-temperature small-particle coal near the outer sides of the funnel cap holes can not enter the funnel cap holes, and the condition that the funnel cap holes are blocked is finally avoided.

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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