JPH0241511Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recuperator that uses high-temperature waste gas containing dust.

For example, a recuperator that uses high-temperature waste gas containing dust at a temperature of 750 to 850 DEG C. has conventionally been constructed as shown in FIGS. 1 to 3.

In FIGS. 1 to 3, the recuperator, which is designated by the reference numeral 1 as a whole, is formed into a cylindrical shape.

A waste gas introduction chamber 4 having a high-temperature waste gas introduction port 4a is provided at the top of the requioperator 1, and a body 2 having an upper tube plate 14 and a lower tube plate 15 is located below it. Furthermore, a waste gas discharge chamber 8 having a waste gas discharge port 8a is provided on the lower side of the body 2. Therefore, the waste gas introduction chamber 4 and the body 2 and the body 2 and the waste gas discharge chamber 8 are partitioned by the upper tube plate 14 and the lower tube plate 15, respectively. 8 are formed independently.

A fireproof insulation material 16 is installed on the inner wall of the high temperature waste gas introduction chamber 4.
is lined with insulation material 3 on the outer periphery of the body 2.
are installed all over.

An air inlet 11 is formed in the lower part of the fuselage 2,
A discharge port 5 for air heat-exchanged with the high-temperature waste gas is formed in the upper part.

Inside the body 2, a large number of pipes 6 are provided in parallel with the axial direction of the body 2, as shown enlarged in FIG. The piping 6 is a piping for guiding high-temperature waste gas, and is arranged in large numbers at a predetermined pitch inside the body 2, with its upper end connected to the upper tube plate 14.
It penetrates through and opens into the high-temperature waste gas introduction chamber 4, and its lower end passes through the lower tube plate 15 and opens into the waste gas discharge chamber 8. Therefore, the high-temperature waste gas introduced into the waste gas introduction chamber 4 is introduced into the pipe 6, guided downward, and transferred into the waste gas discharge chamber 8.

On the other hand, between these pipes 6, as shown in FIG. 2, a plurality of air introduction pipes 7 are arranged at predetermined intervals, the upper ends of which are fixed to the upper tube plate 14, and the lower ends of which are fixed to the upper tube plate 14. It is provided separated from the lower tube plate 15 by a predetermined distance. This pipe 7 has an air intake port 7a opened at the lower side surface, and an air outlet port 7b opened at the upper side surface.

In addition, what is shown by the code|symbol 8b of the waste gas discharge chamber 8 is a manhole.

Furthermore, as shown in FIG. 1, a large number of baffle plates 9 and 10 are attached to the piping 6 and the air introduction pipe 7 at predetermined intervals and arranged in a staggered manner so as to be orthogonal to each piping 6. The air for heat exchange introduced into the body 2 from the air inlet 11 formed at the lower part of the body 2 passes alternately between the baffle plates 9 and 10 as shown by dotted arrows in FIG. It remains in the requioperator 1 for a relatively long time and exchanges heat with the high-temperature waste gas led into the pipe 6.
The air is discharged to the outside through an air discharge port 5 formed at the top.

Further, a part of the air introduced into the body 2 from the air introduction port 11 is transferred to the air intake port 7 of the air introduction pipe 7.
The air is introduced into the air introduction pipe 7 from a, is guided upward, and is discharged into the fuselage 2 from the air outlet 7b while not being very hot, as shown by the solid arrow in Fig. 1. be done. This discharged air cools the upper tube sheet 14 and the upper outer wall of the pipe 6 which are in a high temperature atmosphere, thereby preventing oxidative corrosion thereof.

In a recuperator having such a structure, a large amount of dust is contained in the high-temperature waste gas, and this dust gradually adheres inward from the inlet of the pipe 6, as shown in an enlarged view in Fig. 3. If this grows, the pipes will eventually become clogged, making heat exchange impossible. In FIG. 3, reference numeral 12 indicates attached dust.

The present inventor investigated such a blocked state and found that the length to which dust 12 often adheres is about 500 mm from the inlet end of the pipe 6, which is 5 to 6 times the diameter of the pipe 6. I understood.

The reason why the dust 12 adheres in this way is that the turbulence in the flow of high-temperature waste gas at the inlet of the pipe 6 causes partial stagnation, which slows down the flow velocity in this part, and that the inlet end of the pipe 6 The temperature of the high-temperature waste gas is about 750 to 850℃, but if the temperature of the waste gas at the inlet end is as low as about 400℃, it is estimated that there will be no dust attached to the piping. It is thought that the higher the temperature of the waste gas on the inlet end side of No. 6, the more likely it is to adhere.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and aims to provide a requioperator configured to prevent dust from adhering to piping through which high-temperature waste gas is introduced and causing blockages. .

In this invention, in order to achieve the above object, a removable connecting pipe of a desired length is provided at the inlet of the high-temperature waste gas of the piping through which the high-temperature waste gas is introduced so that it can be easily replaced. We adopted a structure that allows the connecting tube to be removed when dust accumulates and either remove the dust or replace it with a new connecting tube prepared in advance.

The present invention shown in the drawings will be explained in detail below.

4 and 5 illustrate the invention. In FIGS. 4 and 5, the same or corresponding parts as in FIGS. 1 to 3 are designated by the same reference numerals, and the explanation thereof will be omitted.

In the present invention, a removable connecting pipe 6a of a desired length is installed on the piping 6 inside the high-temperature waste gas introduction chamber 4.
The connecting pipe 6a can be held by a heat-resistant holding member 13 made of rock wool or the like.
As mentioned above, the length of the connecting pipe 6a is 5 to 6 times the diameter of the pipe 6a, to which dust often adheres, but some dust may adhere to longer lengths as well. Select a length that is 5 to 10 times the pipe diameter, taking into account a margin. In addition, the reference numeral A in FIGS. 4 and 5 is a connection port formed by mating the pipe 6 and the connection pipe 6a.

Since the present invention is constructed as described above, if dust adheres to the connecting pipe 6a connected to the upper end of the piping 6, it is possible to remove only this connecting pipe 6a and remove the dust. Alternatively, operation can be continued by simply replacing the connecting pipe with a new one.

As is clear from the above explanation, the present invention employs a structure in which a connecting pipe of a desired length is detachably provided at the end of the high-temperature waste gas inlet side of the pipe that guides the high-temperature waste gas. If high-temperature waste gas dust adheres to the connecting pipe, the dust can be removed by replacing the connecting pipe itself. Therefore,
Unlike conventional methods, accidents such as heat exchange becoming unusable do not occur.

In addition, the smoke pipe and the connecting pipe are made to have approximately the same diameter, are butted together, and are connected using an elastic, heat-resistant holding member such as rock wool, so the connection method is simple and easy, which is very advantageous in terms of maintenance. It also has the following effects.

[Brief explanation of the drawing]

Figures 1 to 3 explain the conventional structure.
Fig. 1 is a vertical side view of the recuperator, Fig. 2 is an enlarged cross-sectional plan view of the requiperator, Fig. 3 is a partially enlarged cross-sectional view of piping that guides high-temperature waste gas, and Fig. 4 is a partially longitudinal cross-sectional view explaining the present invention. The side view, FIG. 5, is a partially enlarged view of FIG. 4. DESCRIPTION OF SYMBOLS 1... Requioperator, 2... Body, 3... Heat insulating material, 4... Waste gas introduction chamber, 4a... Waste gas inlet, 5... Air discharge port, 6... Piping, 6a... Connection pipe, 7...Air introduction pipe, 8...High temperature waste gas discharge chamber, 8a...High temperature waste gas discharge port, 9, 10...Baffle plate, 11...Air introduction port, 12...Dust, 1
3... Piping holding member, 14... Upper tube plate, 15...
...Lower tube plate, 16...Fireproof insulation material.

Claims (1)

[Scope of utility model registration request] In a requioperator that has a large number of piping that leads high-temperature waste gas and exchanges heat with the air flow,
A connection pipe made of heat-resistant material such as rock wool, which can be freely attached and detached to the end of the high-temperature waste gas inlet side of the pipe that guides the high-temperature waste gas, and has approximately the same diameter as the pipe and a length of 5 to 10 times the diameter. A requiperator characterized by being held by a holding member.