CN2527950Y - Fin tube heat exchanger for cage type annealing furnace - Google Patents

Abstract

The utility model provides a finned tube heat exchanger which is composed of finned tubes which have fins inside and outside a tube wall. The finned tubes are composed of the tube wall and the inner and outer fins which are arranged in parallel inside and outside of the tube wall along a circle with a certain distance between each other and which allow gases to flow within the distances. While enlarging the heat exchanging area, heat exchangers of the structure can produce turbulent flow from gases passing through, thereby increasing the convective heat transfer coefficient and improving the heat exchanging effect. Compared to the prior art, the utility model has the advantages of large heat transferring area, high efficiency in heat exchanging and energy saving, and long service life.

Description

The used for hood-type annealing furnace finned tube exchanger

Technical field

The utility model belongs to metallurgical heat-treatment furnace heat exchanger, particularly a kind of used for hood-type annealing furnace finned tube exchanger.

Background technology

As everyone knows, in the heat-treatment furnace of field of metallurgy, heat exchanger is that the fume waste heat that utilizes stove to discharge heats its body, coal gas or the required air of fuel combustion that heat exchanger body will feed in the heat exchanger again carry out preheating, play the theoretical temperature combustion and the fuel-saving effect that improve combustion fuel.At present, the heat exchanger that widely uses of heat-treatment furnace is simple light-pipe structure in the art, is made of the steel pipe of 4-5mm wall thickness.The hot flue gas that stove is discharged passes to the interior cold air of pipe by tube wall, and the air after the preheating is to burner portion and combustion gas mixing after-combustion.The heat exchanger structure of this structure is simple, and heat transfer area is little, and the gas preheat temperature is low, and the heat exchange effect is undesirable.

Summary of the invention

It is big that the purpose of this utility model provides a kind of heat transfer area, and the heat exchange efficiency height is simple in structure, easily manufactured, long service life, the used for hood-type annealing furnace finned tube exchanger of energy savings.

The utility model is achieved in that it is to be combined by the finned tube that has fin inside and outside the tube wall, its finned tube be by tube wall and inside and outside tube wall, along the circumferential direction be arranged in parallel each other at a distance of a determining deviation, and the inside and outside fin that gas is flowed betwixt constitutes.

Main points of the present utility model also are the fin interlaced arrangement that tube wall is inside and outside.

The utility model is according to heat-treatment furnace structure or burner form difference, and finned tube exchanger can prop up finned tube by N and be welded to form its N 〉=1.

The utility model compared with prior art, it is big to have a heat transfer area, the heat exchange efficiency height is simple in structure, easily manufactured, long service life, advantages such as energy savings.It not only is the high efficient heat exchanging parts of bell type annealing furnace, and is the desirable heat exchanger components of other heat-treatment furnaces.

Description of drawings

Accompanying drawing 1 is a contour structures schematic diagram of the present utility model.

Accompanying drawing 2 is the utility model finned tube cross-sectional configuration figure.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

As shown in Figure 1, 2, it is to be combined by the finned tube that has fin inside and outside the tube wall, its finned tube be by tube wall and inside and outside tube wall 1, along the circumferential direction be arranged in parallel each other at a distance of a determining deviation, and the inside and outside fin 2,3 that gas is flowed betwixt constitutes.For increasing body intensity, increase the service life, improve the heat exchange effect, the utility model is fin 2,3 interlaced arrangement inside and outside the tube wall when design, and its finned tube exchanger can be made up of one or many finned tubes.The heat exchanger of this kind structure increases the heat transfer area of heat exchanger greatly, makes the air of heat exchanger inside and outside flue gas produce turbulent flow simultaneously, thereby convective heat-transfer coefficient is increased, and improves the heat exchange effect.

The utility model is according to heat-treatment furnace burner form difference, and finned tube exchanger can prop up finned tube by N and be welded to form, and its N 〉=1 is to reach the purpose of efficient energy-saving.

Claims (3)

1, a kind of used for hood-type annealing furnace finned tube exchanger, it is characterized in that it being that finned tube by having fin inside and outside the tube wall combines, its finned tube be by tube wall (1) and inside and outside tube wall (1), along the circumferential direction be arranged in parallel each other at a distance of a determining deviation, and inside and outside fin (2), (3) that gas is flowed betwixt constitute.

2, used for hood-type annealing furnace finned tube exchanger according to claim 1 is characterized in that fin (2), (3) interlaced arrangement that tube wall is inside and outside.

3, used for hood-type annealing furnace finned tube exchanger according to claim 1 is characterized in that described finned tube exchanger can prop up finned tube by N and form its N 〉=1.