Corrugated elastic seal and rotary air pre-heater sealing device

Abstract

The invention discloses a corrugated elastic seal and a rotary air pre-heater sealing device, which belongs to the technical field of heat exchange equipment. The corrugated elastic seal comprises a wear-resistant end (13), an elastic element (14), a fixing end (15) and a bolt hole (16), wherein the elastic element is a corrugated elastic steel sheet; the wear-resistant end is formed by clamping the friction part of the elastic element by a heat-resistant steel plate; and the fixing end is formed by clamping the fixing part of the elastic element by the heat-resistant steel plate. The rotary air pre-heater sealing device is formed by respectively mounting the corrugated elastic seal in the radial direction of the cold / hot end of a bin clapboard, the axial direction of the bin clapboard, the annular direction for the inner edge of a rotor cold / hot end and the edge of a shell cold / hot end and then is cooperated with a sector plate, an arc plate and a rotor angle steel to realize sealing. Through using the elastic seal and the elastic sealing device, the sealing can meet the irregular change of the sealing gap caused by the mushroom deformation of the rotor, the rotor eccentricity, manufacturing errors and the like.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, in particular to a sealing device of a rotary air preheater, and belongs to a key component of heat exchange equipment of a boiler unit in a thermal power plant. The invention is also applicable to the rotary flue gas heater in the flue gas desulfurization and denitrification system. Background technique [0002] The rotary air preheater is a heat exchange device that uses the heat of boiler exhaust smoke to preheat air. It is generally installed in the vertical flue at the tail of the coal-fired boiler in the power station. There is a relatively serious air leakage problem in the rotary air preheater. The main reason is: due to the gap between the rotating part and the stationary part of the rotary air preheater, the gap between the air side and the flue gas side of the rotary air preheater There is a considerable pressure difference, so the positive pressure air will leak into ...

AI Technical Summary

Problems solved by technology

Hinge-type spring seals and brush-type seals are relatively common contact sealing devices at present, but they all have some shortcomings: hinge-type spring seals have problems such as easy seizure of the hinge, easy failure of the spring, and easy wear and tear of the seal under high temperature conditions. ;Brush seals have problems such as difficulty in making bristles, easy wear and tear, air leakage gaps, and failure to meet service life requirements.

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