JPH063292B2 - Gas propagation combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention employs a flame propagation combustion method as a heat source, and a combustion tube forming a tubular combustion chamber thereof is subjected to finish drying of a sheet-shaped material to be dried, As the heat source, a hot air method using a continuous combustion type gas burner or a radiant method using a radiant burner, further, a conduction heat method in which steam is blown into the conveying roller to heat it, etc. are used, and different from these heat sources. The present invention relates to a gas-propagation combustion device that also serves as a roller for transporting a material to be dried, such as a transport roller having a body structure.

[Conventional technology]

Conventionally, for example, cloth flowing on a line, paper, finish drying of a sheet-shaped material to be dried such as a film, a hot-air method using a continuous combustion type gas burner as its heat source or a radiation method using a radiant burner, Furthermore, a conduction heat method is used in which steam is blown into the transport rollers to heat the transport rollers, and the transport means for transporting an object to be dried, which comprises a transport roller and the like separately from these heat sources, is transported in combination with the heat source. In general, the sheet-shaped material to be dried transferred by the means is heated and dried by hot air or the like from a heat source.

[Problems to be Solved by the Invention]

In the hot air method using a continuous combustion type gas burner as a heat source in the above conventional technology, since the heating temperature is too high, for example, it is not possible to obtain the minimum heating temperature for finish drying of cloth, paper, film, etc. It is very uneconomical because it requires a temperature lowering means to lower the temperature by adding cold air such as a blower, and since the temperature distribution has unevenness, the heat efficiency is poor and the heat loss is significant, which is very uneconomical. , If the distance is too close, the heating temperature of the material to be dried rises too much, so a certain separation distance is required, and the size of the apparatus becomes large.
Since the size of the device is increased due to the need for a separate steam generator, the heat loss is significant and the thermal efficiency is low. Further, since the drying by each of the heat sources and the transportation by the transportation means function exceptionally, the apparatus itself becomes large in size together with the separate placement, and the structure becomes extremely complicated. There was a problem.

The present invention has been made in view of the problems of the conventional technique.
A gas-propagation combustion device that efficiently and uniformly obtains the optimum temperature for heating and drying the material to be dried from various parts of the surface of the combustion tube is used as a heat source, and a tubular combustion chamber of the gas-propagation combustion device is configured. The combustion tube also serves as a roller for conveying the sheet-shaped material to be dried, and the combustion tube of the gas propagation combustion apparatus has two functions of drying and conveying, thereby achieving downsizing of the apparatus and the like of the above conventional technique. It is an object of the present invention to provide a gas-propagation combustion device that solves the problems.

[Means for Solving the Problems]

In order to achieve the above object, the gas propagation combustion apparatus of the present invention is a gas propagation combustion system in which the flame surface propagates by continuously repeating the cycles of air supply and exhaust, ignition, combustion, and extinction in the tubular combustion chamber. In a combustion apparatus, a sheet-like material to be dried such as cloth, paper, and film is wound around a combustion tube that constitutes a tubular combustion chamber and is conveyed, and the combustion tube is also provided with a conveying roller.

[Action]

In the gas propagation combustion device according to the present invention configured as described above, since it is a flame propagation combustion method capable of combustion at a stoichiometric air-fuel ratio, the surface temperature of the combustion pipe is 100 ℃ ~ 300 ℃ to be dried It can be optimal for direct heat transfer heating of objects. Therefore, when applied to finish drying of sheet-shaped dried objects such as cloth, paper, film, etc., thermal efficiency is improved and effective drying is possible due to the fact that heat is not transferred to other than dried objects due to conduction heating. it can. Further, since the combustion tube forming the tubular combustion chamber is also provided with a roller for conveying the sheet-shaped material to be dried, the combustion tube has both a drying function and a conveying function, so that the apparatus can be downsized.

〔Example〕

An embodiment of a gas propagation combustion device according to the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a combustion tube which constitutes a tubular combustion chamber A of a gas propagation combustion apparatus, and is formed in a straight tube shape, and its rotation can be freely performed by bearings 2 and 3 which support two lower parts of both sides by two rollers. In the embodiment, the belt 7 is stretched around the pulley 5 fixed to the motor shaft 4 of the drive motor M and the pulley portion 6 integrally formed on one side of the combustion pipe 1 in the embodiment, and the combustion motor 1 is directly connected to the combustion pipe 1 by the drive motor M. A roller for transporting the sheet-shaped material to be dried E provided on the combustion tube 1 such that the sheet-shaped material to be dried E such as cloth, paper or film is wound around the combustion tube 1 and can be conveyed. , And is incorporated into a line flowing at a constant speed so that it can be directly used for heat transfer heating. Although the above-described embodiment is applied to the case where the combustion tube 1 is applied to the driving transfer roller, it is needless to say that the embodiment can be applied to an intermediate transfer roller having no driving device such as a motor. Further, in practical use of the gas propagation combustion device of the present invention, as shown in FIG. 3, a plurality of combustion pipes 1 also serving as conveyance rollers are provided on the air supply side and the exhaust side in consideration of temperature distribution and the like. It is arranged alternately and provided at positions deviated vertically and the like, and the front and back of the sheet-shaped material to be dried E are alternately contacted with these combustion tubes 1 and wound so as to be conveyed in a fixed direction.

A narrowing portion 8 for extinguishing a flame and a mixing chamber 9 are integrally connected to the air supply side B of the combustion pipe 1, and the gas supply pipe 10 is connected to the mixing chamber 9.
So that the fuel gas from and the combustion air supplied from the air supply fan F through the air supply pipe 11 are premixed by the mixture supply pipe 12 and are forcibly fed from the discharge port 12a thereof at a constant pressure. And the mixing chamber 9 that rotates integrally with the combustion tube 1.
A sealing material 13 is interposed between the discharge port 12a and the fixed discharge port 12a so as not to hinder the rotation of the combustion pipe 1, and the gas supply amount is controlled by a valve 14 provided in the gas supply pipe 10. The amount of air supplied is freely adjustable by a valve 15 provided in the air supply pipe 11, and a fixed exhaust pipe 17 provided with an ignition heater 16 on the exhaust side C of the combustion pipe 1 is used for rotating combustion. A sealing material 17a is connected to the pipe 1 so as not to interfere with the rotation of the combustion pipe 1, and is connected to form a gas propagation combustion device.

In the gas propagation combustion device having the above structure, the combustion mechanism will be described below. During operation, the air-fuel mixture that is always forcibly fed to the mixing chamber 9 under a constant pressure is constricted during the air-supply operation of the combustion cycle. 8 is fed into the combustion tube 1 forming the tubular combustion chamber A, flows from the air supply side B to the exhaust side C and is filled, and the tip of the air-fuel mixture reaches the ignition heater 16 on the exhaust side C. When reaching, the tip end of the air-fuel mixture is ignited by the ignition heater 16, so that the air-fuel mixture filled in the combustion tube 1 begins to burn from the tip side and sequentially burns from the exhaust side C to the air supply side B. Then, the flame surface a flows through the inside of the combustion pipe 1 from the exhaust side C to the air supply side B and propagates the flame to heat the combustion pipe 1. When the terminal end of the flame surface a reaches the narrowed portion 8 on the air supply side B, a blocking wall is formed at the narrowed portion 8 to block the flame flow and to rapidly change the flow velocity to surely extinguish the fire. Then, the process proceeds to the next cycle, and in the air supply operation, the combustion exhaust gas from the previous cycle is pushed out to the exhaust side C and discharged from the exhaust pipe 17 to the outside of the unit.
The flame propagating combustion operation is continuously repeated, and the above cycle of supply and exhaust, ignition, combustion, and extinguishing is continuously repeated for a fixed time determined by the conditions such as the length of the combustion tube 1 for each cycle. The flame surface a is the combustion tube 1
Although each part of the combustion tube 1 is heated uniformly from the inner surface by propagating inside, in the flame propagation combustion method,
Combustion at the stoichiometric air-fuel ratio is possible, and the surface temperature of the combustion pipe 1 at that time is 100 ° C to 300 ° C, which is an optimum temperature for direct conduction heating and drying, and fluctuations in the length direction of the combustion pipe 1 are also obtained. It does not occur at all.

If the combustion tube 1 also serving as a conveying roller is incorporated in the finish drying section of the sheet-like material E to be dried such as cloth, paper or film flowing at a constant speed on the line, the combustion tube 1
Has the drying function and the conveying function at the same time.

In addition to the above embodiment, the combustion tube 1 may be freely rotatably provided on a normal bearing via a bearing or the like.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

The combustion method in which the flame surface propagates by continuously repeating the cycle of air supply and exhaust, ignition, combustion, and extinguishing in the tubular combustion chamber is capable of combustion at the stoichiometric air-fuel ratio, and the tubular combustion chamber at that time. The surface temperature of 100 ℃ -300 ℃ is suitable for direct conduction heating and drying. Then, since a combustion roller forming the tubular combustion chamber is also provided with a conveyor roller for winding and conveying a sheet-shaped material to be dried such as cloth, paper, and film, cloth, paper, film, etc. flowing on the line If it is applied to finish drying, the conduction heating does not transfer heat to other than the object to be dried and the thermal efficiency is improved, so effective drying can be performed, and since the combustion tube has two functions of drying and transportation, it is a heat source. Since it is not necessary to separately install the transport means and the transport means, not only the apparatus can be downsized but also the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a gas propagation combustion device according to the present invention, FIG. 2 is a perspective view when in use, and FIG. 3 is a side view of an example of use. A ... Tubular combustion chamber, a ... Flame surface, 1 ... Combustion tube, E ... Dried object.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihisa Kato 507-2 Shintakaracho, Tokai-shi, Aichi Toho Gas Co., Ltd. Research Institute of Technology (72) Inventor Satoshi Kato 507-2 Shintakara-cho, Tokai-shi, Aichi Prefecture Toho Gas Technology Co., Ltd., Research Institute of Technology (72) Inventor, Kousuke Ishiguro 6-23, Taoyuan-cho, Mizuho-ku, Nagoya, Aichi Prefecture Paloma Industry Co., Ltd. (72) Inventor, Katsu Kodama Tao-en-cho, Mizuho-ku, Nagoya, Aichi Prefecture 6-23 No. 23, Technical Department, Paloma Industry Co., Ltd. (72) Inventor Kazunori Ueyama 6-23, Taoyuan-cho, Mizuho-ku, Nagoya City, Aichi Prefecture (72) Technical Department, Kiyoshi Kawashima Mizuho-ku, Nagoya-shi, Aichi Prefecture 6-23 Taozonocho Paloma Industry Co., Ltd.

Claims (1)

[Claims] 1. A gas-propagating combustion apparatus of a combustion system, wherein a flame surface (a) is propagated by continuously repeating a cycle of air supply and exhaust, ignition, combustion, and extinguishing in a tubular combustion chamber (A). Cloth for the combustion pipe (1) that constitutes the combustion chamber (A),
A gas-propagating combustion apparatus, characterized in that a sheet-shaped material to be dried (E) such as paper or film is wound around and transported, and the combustion tube (1) also serves as a transportation roller.