JPH035603A - Gas propagating burner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention employs a flame propagation combustion method as a heat source, and the combustion tube constituting the tubular combustion chamber is also equipped with rollers for conveying sheet-shaped materials to be dried. The present invention relates to a gas propagation combustion device.

[Conventional technology]

Conventionally, for example, for final drying of sheet-like materials such as cloth, paper, and film flowing on a line, hot air methods using continuous combustion gas burners or radiant methods using radiant burners have been used as the heat source. Furthermore, a conduction heat method, etc., in which steam is blown into the transport roller to heat it, is used, and the heat source is combined with a means for transporting the dried material, which is composed of a transport roller, etc., configured separately from these heat sources. Generally, the structure is such that the sheet-shaped material to be dried that is transported by the transport means is heated and dried using hot air or the like from a heat source.

[Problem to be solved by the invention]

In the hot air method using a continuous combustion type gas burner as the heat source in the conventional technology described above, the heating temperature is too high, so it is not possible to obtain the optimum heating temperature for finishing drying of cloth, silk, film, etc. It requires a temperature-lowering means such as a blower to lower the temperature by adding cold air, and the uneven temperature distribution results in poor thermal efficiency and significant heat loss, making it extremely uneconomical. If they are too close together, the heating temperature of the material to be dried will rise too much, so a certain distance is required and the equipment becomes larger.In the conduction heat method, which heats the conveyor roller by blowing steam into it, a separate steam generator is required. Thermal efficiency decreases because the equipment becomes larger and the heat loss is significant. In addition, since the drying by the heat source and the conveyance by the conveyance means function separately, the fact that these are installed separately not only increases the size of the device itself, but also makes the structure extremely complex. There was a problem.

This invention has been made in view of the problems of the conventional technology,
A gas propagation combustion device is used as a heat source that can efficiently and evenly obtain the optimum temperature for heating and drying the material to be dried from each part of the surface of the combustion tube, and a tubular combustion chamber of the gas propagation combustion device is configured. By providing the combustion tube with a roller for conveying the sheet-like material to be dried, the combustion tube of the gas propagation combustion apparatus has two functions of drying and conveyance, thereby reducing the size of the apparatus and improving the conventional technology described above. The purpose is to provide a gas propagation combustion device that eliminates the problems.

[Means for Solving the Problems] In order to achieve the above object, the gas propagation combustion device of the present invention continuously repeats the cycle of supplying and exhausting air, ignition, combustion, and extinguishing in the tubular combustion chamber to suppress the flame. In a gas propagation combustion device using a surface propagation combustion method, a sheet-like material to be dried such as cloth, paper, or film is wrapped around the combustion tube constituting the tubular combustion chamber and then transported to the combustion tube. It also has a roller.

[For production]

Since the gas propagation combustion apparatus according to the present invention configured as described above uses a flame propagation combustion method that allows combustion at a stoichiometric air-fuel ratio, the surface temperature of the combustion tube can be maintained at 100°C to 30°C.
00°C, which is optimal for direct heat transfer heating of the material to be dried. Therefore, when applied to the final drying of sheet-like materials such as cloth, paper, and film, the thermal efficiency is improved and effective drying is possible, as there is no heat transfer to anything other than the material due to conduction heating. can. Further, since the combustion tube constituting the tubular combustion chamber is also provided with rollers for conveying the sheet-like material to be dried, the combustion tube has both a drying function and a conveyance function, so that it is possible to downsize the apparatus.

〔Example〕

Embodiments of the gas propagation combustion apparatus according to the present invention will be described below with reference to the drawings.

In the drawing, reference numeral 1 denotes a combustion tube constituting the tubular combustion chamber A of the gas propagation combustion device, which is formed in the shape of a straight tube, and whose lower parts on both sides are supported by two rollers, allowing it to rotate freely. In the shaft-mounted embodiment, a belt 7 is passed between a pulley 5 fixed to the motor shaft 4 of the drive motor M and a pulley portion 6 formed integrally with an example of the combustion tube 1, and the combustion tube 1 is directly rotated by the drive motor M. A roller for conveying the sheet-like dried material E such as cloth, paper, film, etc. is provided around the combustion tube 1 so that it can be wrapped around the combustion tube 1 and transported. For example, it can be installed on a line flowing at a constant speed and subjected to direct heat transfer heating. Note that the above embodiment is a case where the combustion tube 1 is used as a driving conveyance roller, but
Of course, the present invention can also be applied to intermediate conveyance rollers that do not have a driving device such as a motor. In addition, when putting the gas propagation combustion device of the present invention into practice, as illustrated in FIG.
A plurality of combustion tubes 1, which also serve as conveyor rollers, are installed at positions offset to the upper and lower rings, with their air supply and exhaust sides alternately arranged in consideration of temperature distribution, etc., and sheet-like It is constructed so that the front and back sides of the material to be dried E are brought into contact with each other alternately and the material is wrapped and conveyed in a fixed direction.

A constricted part 8 for extinguishing the 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 1 is connected to the mixing chamber 9.
The fuel gas from 0 and the combustion air supplied from the air supply fan F through the air supply pipe 11 are premixed in the mixture supply pipe 12 and are forcibly fed from the discharge port 12a at a constant pressure. A sealing material 13 is interposed between the mixing chamber 9, which rotates together with the combustion tube 1, and the fixed discharge port 12a, so as not to interfere with the rotation of the combustion tube 1, and these are connected. However, the gas supply amount can be freely adjusted with a valve 14 provided on the gas supply pipe 10, and the air supply amount can be freely adjusted with a valve 15 provided on the air supply pipe 11. A gas propagation combustion device is constructed by interposing a sealing material 17a between a fixed exhaust pipe 17 provided with an ignition heater 16 and a rotating combustion pipe 1 so as not to interfere with the rotation of the combustion pipe 1. .

In the gas propagation combustion device having the above configuration, the combustion mechanism will be explained next. During operation, the air-fuel mixture is constantly forcibly fed to the mixing chamber 9 under a constant pressure, and during the air supply operation of the combustion cycle, the air-fuel mixture is 8, the mixture is fed into the combustion tube 1 constituting the tubular combustion chamber A, flows from the intake side B to the exhaust side C, and is filled, and the tip of the mixture is supplied to the ignition heater 16 on the exhaust side C.
When the fuel mixture reaches the tip, the ignition heater 16 ignites the mixture at the tip, so the mixture filling the combustion tube 1 starts to burn from the tip, moving from the exhaust side C to the intake side B. The combustion occurs sequentially, and the flame surface a flows within the combustion tube 1 from the exhaust side C to the intake side B, causing flame propagation and heating the combustion tube 1.

When the end of the flame surface a reaches the constriction part 8 on the air supply side B, a barrier is created at the constriction part 8 to dam the flame flow and give a sudden change to the flow velocity to quickly and reliably extinguish the flame. The flame propagation combustion operation is repeated continuously, in which the combustion exhaust gas from the previous cycle is pushed out to the exhaust side C and released from the exhaust pipe 17 to the outside of the device. Then, the above cycle of air supply and exhaust, ignition, combustion, and extinguishing is repeated continuously for a certain period of time determined by conditions such as the length of the combustion tube 1, and the flame surface a propagates inside the combustion tube 1 for each cycle. By doing this, each part of the combustion tube 1 is heated evenly from the inside. However, in the flame propagation combustion method described above, combustion is possible at the stoichiometric air-fuel ratio, and the surface temperature of the combustion tube 1 at that time is 100°C. The optimum temperature for direct conduction heating drying of ~300°C is obtained, and no fluctuation occurs in the length direction of the combustion tube 1.

Therefore, if the above-mentioned combustion tube 1 equipped with conveying rollers is installed in the finishing drying section for drying material E in the form of a sheet such as cloth, paper, or film flowing at a constant speed on the line, the combustion tube 1
This device performs both drying and conveying functions at the same time.

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

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

A combustion method in which the cycle of air supply and exhaust, ignition, combustion, and extinguishing is repeated continuously in a tubular combustion chamber, and the flame front propagates, is capable of combustion at the stoichiometric air-fuel ratio, and at the same time The surface temperature is 100°C to 300°C, which is suitable for direct conduction heating drying. Therefore, since the combustion tube constituting the tubular combustion chamber is equipped with a conveying roller for wrapping and conveying sheet-like materials to be dried such as cloth, paper, and film, the cloth, paper, film, etc. flowing on the line If it can be used for finish drying, etc., conductive heating will improve thermal efficiency as there is no heat transfer to anything other than the object to be dried, so effective drying will be possible.
Furthermore, since the combustion tube has two functions: drying and conveying, there is no need to separately install a heat source and a conveying means, which not only reduces the size of the apparatus but also simplifies its structure.

[Brief explanation of drawings]

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

Claims (1)

[Claims] In a combustion type gas propagation combustion device in which the flame front (a) propagates by continuously repeating the cycle of air supply and exhaust, ignition, combustion, and extinguishing in the tubular combustion chamber (A), the tubular combustion chamber (A) The combustion tube (1) constituting the combustion tube (1) is configured to wrap and convey a sheet-like material to be dried (E) such as cloth, paper, or film, and the combustion tube (1) is also equipped with conveyance rollers. Gas propagation combustion equipment.