A wear-resistant and anti-leakage slag cap with a combined core tube

Abstract

An abrasion proof slag-leakage resistant wind cap with a combined core tube comprises a wind cap outer cover with a top hole in the top and a bottom hole in the bottom and a combined core tube penetrating through the wind cap outer cover and combined with the wind cap outer cover, wherein the combined core tube is formed by sequentially connecting a heterotypic plug, a flow guide core tube and a fixing core tube; the combined core tube passes through the heterotypic plug, penetrates through the top hole of the wind cap outer cover and is fixed with the wind cap outer cover; a flowing gap is reserved between the outer wall of the combined core tube and the inner wall of the wind cap outer cover; the combined core tube tightly penetrates through the bottom hole of the wind cap outer cover, passes through the fixing core tube, penetrates through an air distribution plate opening, and is fixed with an air distribution plate; a plurality of flow guide core tube small holes are formed in the periphery of the side surface of the upper part of the flow guide core tube; a plurality of wind cap outer cover small holes incline downwards are formed in the periphery of the side surface of the thickened wall of the lower part of the wind cap outer cover. The abrasion proof slag-leakage resistant has the characteristics of simple structure, convenience for processing and manufacture and easiness in overhaul and replacement.

Description

technical field [0001] The invention relates to the technical field of a circulating fluidized bed boiler air cap, in particular to a wear-resistant and anti-leakage slag air cap with a combined core tube. Background technique [0002] As a clean coal power generation technology with wide fuel adaptability, large load regulation ratio and low pollutant emissions, circulating fluidized bed boilers have developed rapidly at home and abroad. The safe and economical operation of circulating fluidized bed boilers is restricted by many factors, the most important of which is the need to establish a stable material circulation, and the air cap on the air distribution plate is of great significance for the realization of material fluidization. Improper design and arrangement of air caps can easily lead to accidents such as air chamber slag leakage, uneven fluidization, bed coking, etc. Many circulating fluidized bed boilers that have been in operation for a period of time have exper...

AI Technical Summary

Problems solved by technology

However, limited by the hood pitch and on-site construction space, it is very difficult to repair and replace the hood by welding and fixing in the later stage, and it is difficult to ensure the construction quality; (3) the outer cover and the core pipe are fixed together by threaded connection (for example, Chinese invention patent application 201010228307.9 Annular steady flow hood), in actual operation, due to the high temperature in the dense-phase area of ​​the circulating fluidized bed boiler, the thread is easy to deform and expand, resulting in the inclination and lifting of the hood cover, and it is difficult to disassemble after the furnace is shut down in a cold state, and it is not easy to repair and replace

[0007] Affected by the operating conditions and the needs of energy saving and consumption reduction, a considerable number of circulating fluidized bed boilers need to carry out technical transformation of the air cap, and the existing air cap structure is difficult to replace and adjust, which is not suitable for the technical transformation of the boilers put into operation

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