Wall-through sealing structure of supercharged boiler

Abstract

The invention discloses a wall-through sealing structure of a supercharged boiler. The boiler is provided with an inner housing protection plate and an outer housing, and is characterized in that an inner sleeve pipe penetrating into the boiler is hermetically welded on the inner housing protection plate; an inner flange plate is connected to the outer end of the inner sleeve pipe; an insertion pipe with one end penetrating into the boiler and the other end penetrating out of the outer housing is arranged in the inner sleeve pipe; the insertion pipe is hermetically connected with the inner flange plate and an inner flange plate matched plate through packing; an outer sleeve pipe penetrating into the outer housing and sleeved on the insertion pipe is hermetically welded on the outer housing; an outer flange plate is connected to the outer end of the outer sleeve pipe; and the outer sleeve pipe is welded and connected with an outer flange plate matched plate. According to the invention, the insertion pipe is fixed with respect to the position of the outer housing, the relative position of the insertion pipe penetrating into the inner housing protection plate is changed when the inner housing protection plate and the outer housing of the supercharged boiler are expanded or contracted, and the wall-through sealing structure can guarantee not only absorption of contraction and expansion changed with temperature but also a good sealing effect to guarantee safe and stable running of the supercharged boiler.

Description

technical field [0001] The invention belongs to the energy and power industry, and relates to a wall-through structure of a pressurized boiler, in particular to a wall-through sealing structure of a pressurized boiler. Sealed through the wall. Background technique [0002] As the core equipment of the ship's steam power plant, the development direction of the boiler is light weight, small size and good mobility. At present, the two measures to reduce the size and weight of the boiler are to increase the water cooling degree of the furnace and to increase the heat absorption rate of the convection heating surface, that is, to increase the heat release coefficient of the flue gas to the tube wall. Judging from the current development status, the water cooling degree of various atmospheric pressure boilers has reached the limit, and it is difficult to improve it. The way to increase the heat release coefficient of the flue gas to the tube wall is to increase the flow rate of ...

AI Technical Summary

Problems solved by technology

But at the same time, the high volumetric heat load also increases the difficulty of boiler structure design, the furnace temperature is high, the expansion of the double-layer shell of the boiler increases, and the requirements for the wall-through sealing structure of the boiler are more stringent

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