Improved coal sliding tube anti-blocking structure

Abstract

The invention relates to an improved coal sliding tube anti-blocking structure which comprises a coal sliding tube, wherein the coal sliding tube comprises a tilted section; and at least one pneumatic anti-blocking structure is arranged on the tilted section. Because at least one pneumatic anti-blocking structure is additionally arranged on the bottom plate of the coal sliding tube, the phenomenaof the wind pressure and the flow velocity attenuation resulted from long pipelines are avoided, an air cushion is formed between coal and the bottom plate, the contact frequency with the bottom plate is reduced, the problem of coal blocking is completely solved, and the service life of the coal sliding tube can be simultaneously prolonged. In addition, the pneumatic anti-blocking structure is formed through the surrounding of steel plates, and the parts of special nozzles and the like are not required to be manufactured, thus, the investment and the maintenance charge can be reduced.

Description

technical field [0001] The invention relates to a coal-sliding pipe, in particular to an improved coal-sliding pipe anti-blocking structure, which belongs to the technical field of circulating fluidized bed boiler equipment. Background technique [0002] All have anti-blocking structures in the coal slip pipes used in existing circulating fluidized bed boilers, such as figure 1 As shown, the structure is as follows: the coal-spreading air structure is arranged at the joint between the coal-sliding pipe and the furnace, and the coal-sowing air structure is arranged at the fire-watching mirror end of the coal-sliding pipe. However, due to the long coal-sliding pipe, the pressure and flow velocity of the coal-feeding air will attenuate, and the result is that between the AB sections of the bottom plate of the coal-sliding pipe (such as figure 1 As shown) at a certain position, the purpose of transportation will not be achieved. In addition, when the humidity of the coal enteri...

AI Technical Summary

Problems solved by technology

However, due to the long coal-sliding pipe, the pressure and flow velocity of the coal-feeding air will attenuate, and the result is that between the AB sections of the bottom plate of the coal-sliding pipe (such as figure 1 As shown) a certain position will not be able to achieve the purpose of transportation, and in addition, when the humidity of the coal entering the furnace is high, it is easy to cause coal blocking

Coal blockage by slipping coal pipes will cause the boiler to reduce load operation in mild cases, and will directly lead to boiler coking or shutdown accidents in serious cases, and there is also a hidden danger of being scalded during the process of handling coal blockages

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