Expansion sealer

Abstract

The invention relates to the field of boiler equipment, and in particular relates to an expansion sealer. The expansion sealer is characterized in that a shell is a hollow cavity with openings at two ends; a fixed sealing disk is arranged in the hollow cavity; a moving sealing disk is arranged on the fixed sealing disk; one end of an upper residue discharging pipe sequentially penetrates through the opening in one end of the shell, the moving sealing disk and the fixed sealing disk and is arranged in the shell; gaps are respectively formed between the fixed sealing disk and the upper residue discharging pipe and between the moving sealing disk and the upper residue discharging pipe; a plurality of sealing bodies are arranged in an accommodating space encircled by the shell, the fixed sealing disk, the moving sealing disk and the upper residue discharging pipe and are used for filling the gaps. The expansion sealer provided by the invention has the advantages that the upper residue discharging pipe can move along different directions in a discharging process of high-temperature ash residues, and the gaps can be filled with the sealing bodies at any time, so that a joint of the residue discharging pipe and a hearth cannot be cracked, the ash residues cannot be leaked, and the phenomena of environment pollution, unplanned boiler shutdown and economic loss are avoided.

Description

technical field [0001] The invention relates to the field of boiler equipment, in particular to an expansion sealer. Background technique [0002] Circulating fluidized bed boiler is a high-efficiency, low-pollution and clean-burning equipment that has developed rapidly in the past ten years. During the use of the circulating fluidized bed boiler, the ash generated in the furnace needs to be discharged into the slag cooler through the slag discharge pipe through the slag discharge system. But because the temperature in the furnace is very high, after the ash slag enters the slag discharge pipe, the slag discharge pipe expands and causes deformation, which is inconvenient to use. [0003] In order to solve the above problems, metal bellows expansion joints are provided on the slag discharge pipe in the related art, and the metal bellows expansion joints include bellows and flanges, and flanges are respectively arranged at both ends of the bellows; the slag discharge pipe inc...

AI Technical Summary

Problems solved by technology

[0004] However, the internal flow medium of the metal bellows expansion joint in the related art is high-temperature slag at about 950°C. The metal bellows expansion joint has poor compensation ability and is prone to plastic deformation, which will cause cracks at the interface between the slag discharge pipe and the furnace, resulting in ash Slag leaks, pollutes the environment, and even causes unplanned shutdown of the boiler, resulting in economic losses

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