KR900008086Y1 - Channel type recuperator - Google Patents

Abstract

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Description

Channel Type Recuperator

1 is a longitudinal cross-sectional view showing a channel type recuperator of the present invention installed in the years of various industrial furnaces.

2 is a side view of the present article.

3 is a perspective view showing one heat pipe in FIGS. 1 and 2;

4 is a cross-sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

21, 21 ': entrance 22, 22': extension

23, 23 ': Heat pipe 24, 24': Double pipe

25, 25 ': bellows pipe

The present invention relates to a recuperator, in particular a channel type recuperator, for recovering heat of waste gas discharged from various industrial furnaces.

Due to the deepening of resource depletion, interest in the efficient use of energy has gradually increased, and many devices and various methods have been proposed. An apparatus for recovering waste heat includes a recuperator, which has a channel type and a radial type, and the channel type is composed of a cold air part, a hot air part, and a conversion part, and is installed in a year in which waste gas is discharged. It is a device for recovering heat retained by waste gas.

Channel type liquefiers are published in Japanese Laid-Open Patent Application Nos. 51-106963 and 58-119067, which control the shape of the heat transfer pipe and insert a straight, cross or screw template into the heat transfer pipe. As a result, each intended to increase thermal efficiency.

However, since the apparatus is installed in the year in which waste gas is discharged, the apparatus comes into contact with corrosive gas such as sulfur components, and in particular, the heat transfer pipe temperature near the inlet of cold air for combustion is below the dew point of the corrosive gas (sulfur gas). There is a problem that the low temperature corrosion occurs badly compared to the other part is cooled to the temperature, the life of the device is shortened.

In addition, Japanese Laid-Open Publication No. 60-12087 also proposes a channel-type recuperator, which improves the life span due to corrosion by applying ceramic tubes throughout the heat transfer pipe.

However, this apparatus also has problems such as low thermal conductivity and difficulty in coating (welding) and high material cost.

In addition, the well-known channel type recuperators have a problem in that the lifespan is significantly shortened as the heat transfer pipe is expanded and deformed when used at high temperature.

Accordingly, the present invention is to solve the above-mentioned problems, the purpose of which is that the heat pipe is not in direct contact with the corrosive gas contained in the waste gas, and the life of the device is extended by receiving the expansion of the heat pipe as much as possible. It is to provide a channel-type recuperator.

In order to achieve the above object by the present invention, a channel type having a bellows tube capable of maximally accommodating expansion of a double pipe and an electric heat pipe to prevent direct contact with a corrosive gas in a radio wave pipe through which a cold hot air part and a switching part are sealed. By providing a recuperator.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

That is, the channel type recuperator 1 of the present invention has a cold and heat richness 20 and 20 'having a plurality of heat transfer pipes 23 and 23' and conversion as shown in FIGS. 1 to 4. It is formed as a portion (30).

The cold and hot air portions 20 and 20 'may include inlets 21 and 21' formed at an upper portion thereof, and expansion portions 22 and 22 'having a predetermined size through which the heat pipes 23 and 23' are connected to each other. Include.

The heat transfer pipes 23, 23 ′ are upper plates 27, 27 of the switching part 30 from the tight plates 26, 26 ′ of the extension parts 22, 22 ′ as shown in FIGS. 1 to 3. ') Extending through to the through-connected, the combustion air 40 from the inlet 21 of the expansion unit 22 is moved to the switching unit 30 through the expansion unit 22, the switching unit 30 Combustion air 40 is introduced from the through the extension portion 22 'to be moved to the hot air nozzle of the not shown.

The double pipes 24 and 24 'surrounding the outside of the heat transfer pipes 23 and 23' at predetermined intervals have lower ends at the heat transfer pipes 23 and 23 ', and the upper ends are the heat transfer pipes 23 and 23' and the expansion portions. It is fixed to the base plates 26 and 26 'of 22 and 22'.

In addition, bellows pipes 25 and 25 'for accommodating thermal expansion of the heat transfer pipes 23 and 23' are provided in the switching part 30. The upper ends of the bellows pipes 25 and 25 'are switched parts 30. ) Is fixed to the upper plate (27, 27 ') and the lower end is fixed to the heat transfer pipe (23, 23').

Therefore, the bellows pipes 25, 25 'are not in direct contact with the waste gas passing through the flue.

The number and spacing of the corrugated grooves 28 and 28 'formed at the center of the bellows tubes 25 and 25' can be adjusted according to the coefficient of thermal expansion of the heat transfer pipes 23 and 23 '.

The inventors of the present invention have found that the deformation of the heat transfer pipe is not constant by several test results.

This fact is considered to be based on the flow rate and the back pressure of the waste gas, and in view of this point, the bellows pipes 25 and 25 'are installed only in the severely deformed portion.

An example method of installing the bellows pipe is shown in FIG. 4, which is located directly in contact with the waste gas 11, i.e. from the front to the third row, from the back to the second row and on the first row on both sides. It is arrange | positioned to the heat transfer pipes 23 and 23 '.

This position can be adjusted according to conditions such as the temperature of the waste gas 11 and the like.

On the other hand, the switching unit 30 is connected to the cold air portion 20 and the hot air portion 20 'to be sealed through and includes a proper number of heat transfer pipes (23, 23') and bellows pipe (25, 25 ') have.

Heat transfer pipe material used in the present invention is preferably high chromium, Si, Al alloy steel and the like excellent in heat resistance and corrosion resistance.

Here, the functions of the cold air part 20 and the hot air part 20 ′ may be used interchangeably with each other depending on the purpose.

Reference numeral 10 denotes the year of the industrial furnace, and 40 and 41 denote combustion air.

Referring to the effects of the present invention configured as described above are as follows.

As can be seen in FIGS. 1 and 2, the combustion air 40 enters the inlet 21 of the cold air section 20 and is distributed to each heat pipe 23 through the expansion section 22 at high speed. The lowering is moved to the switching unit 30, wherein the combustion air 40 is first heated up by the waste gas 11 during the lowering, and the heated air for combustion is heated by each of the hot air portions 20 '. In the process of ascending through the pipe (23 ') is heated up and discharged through the outlet (20').

The heated combustion air 41 obtained in this way is collected in a hot air pipe, not shown, and transferred from the hot air nozzle to the next process according to each use.

As can be seen from the above, the present invention provides double pipes 24 and 24 'and bellows pipes 25 and 25' surrounding the heat transfer pipes 23 and 23 'above and below the heat transfer pipes 23 and 23'. The waste gas 11 passing through the flue 10 and the heat transfer pipes 23 and 23 'minimize the corrosion due to direct contact and accommodate the expansion of the heat transfer pipes 23 and 23' to the maximum, thereby providing the life of the device. This prolongs a remarkable effect.

In addition, the heat transfer pipes 23 and 23 'can be densely installed, so that the installation space can be relatively small, and according to the appropriate weight and size, it can be divided into small size and easy to repair and repair.

In addition, there is also an advantage suitable for waste heat recovery from the waste gas 11 in the high-temperature range (600-1000 ° C).

Claims (2)

Channel-type recuperator formed of cold air portion 20 and hot air portion 20 'including heat transfer pipes 23 and 23' and extensions 22 and 22 ', and a switching portion 30 connecting therethrough. In the upper portion of the heat transfer pipes (23, 23 '), that is, a double pipe (24, 24') surrounded by a predetermined interval on the erosion corrosion portion is provided, the double pipe (24, 24 ') is the lower end of the heat transfer pipe ( 23 and 23 ', the upper end is fixed to the heat transfer pipes 23 and 23' and the bottom plates 26 and 26 'of the extension portions 22 and 22', and the lower end of the heat transfer pipes 23 and 23 '. The bellows pipes 25 and 25 'surrounded by predetermined intervals are provided, and the bellows pipes 25 and 25' have upper ends on the upper plates 27 and 27 'of the switching section 30 and lower ends on the heat transfer pipes 23 and 25'. 23 '), which is fixed to the channel type liquefier. The method according to claim 1, characterized in that the bellows pipes (25, 25 ') are installed in the heat transfer pipes (23, 23') located from the front to the third row, from the rear to the second row and in the first row on both sides. Channel type recuperator.