JPH035602A - 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] The present invention relates to a gas propagation combustion device in which a combustion tube constituting a tubular combustion chamber is also provided with a roller shaft such as a belt conveyor.

[Conventional technology]

Conventionally, for drying various foods such as biscuits, rice crackers, kamaboko, coffee, and tea, and finishing drying of textiles flowing on the power line, hot air methods or hot air methods using continuous combustion gas burners as the heat source have been used. A radiation method using a radiant burner, a conduction heat method that heats the conveyor roller by blowing steam into it, etc. are used, and these heat sources are combined with a means for conveying the dried material such as a separate belt conveyor. Generally, the drying material is heated and dried by irradiating hot air or the like from a heat source onto the material to be dried, which is transported by a material conveying means such as a belt conveyor.

[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 above conventional technology, the heating temperature is too high and it is not possible to obtain the irradiation temperature of far-infrared wavelengths that are effective for drying, etc., so cold air such as Proa is used. In addition, it requires a means to lower the temperature, and because the temperature distribution is uneven, thermal efficiency is poor and heat loss is significant, making it extremely uneconomical.
In the radiation method using a radiant burner, the heating temperature of the material to be dried rises too much if they are too close together, so a certain distance is required and the equipment becomes large. Since a separate steam generation device is required, the device becomes large-sized, and heat loss is significant, resulting in low thermal efficiency. In addition, since the drying by the heat source and the conveyance by means of conveying the dried material such as a belt conveyor function separately, there are problems such as not only increasing the size of the device itself but also making the structure complicated. .

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, and the irradiation temperature of far-infrared wavelengths can be efficiently and uniformly obtained from each part of the surface of the combustion tube. We have developed a gas propagation combustion device that solves the problems of the conventional technology by making the combustion tube of the gas propagation combustion device have two functions of drying and conveyance by combining the shaft and the combustion tube of the gas propagation combustion device. intended to provide.

[Means for Solving the Problems] In order to achieve the above object, in the gas propagation combustion device of the present invention, the flame front is In a propagation combustion type gas propagation combustion device, a guide roller such as a belt conveyor is provided on a combustion tube constituting a tubular combustion chamber, so that the combustion tube also serves as a roller shaft.

[For production]

In the gas propagation combustion device according to the present invention configured as described above, a guide roller such as a belt conveyor is freely rotatably provided on the combustion tube constituting the tubular combustion chamber, so that the combustion tube also has a roller shaft. By adopting a gas propagation combustion method that allows combustion at the stoichiometric air-fuel ratio, the irradiation temperature of far-infrared wavelengths can be efficiently and uniformly obtained from each part of the surface of the combustion tube, and the drying function due to the irradiation temperature can be achieved. The combustion tube simultaneously performs the conveying function of a drying material conveying means such as a belt conveyor that moves while being guided by guide rollers.

〔Example〕

The following is a gas story based on this invention! Examples of the combustion device will be described with reference to the drawings.

In the drawing, reference numeral 1 denotes a combustion tube constituting a tubular combustion chamber A of a gas propagation combustion device, and a guide roller 3 of a belt conveyor or the like B is connected to the combustion tube 1 via a rotating body 2 such as a ball bearing.
The guide roller 3 is attached to the combustion tube 1 so that the guide roller 3 can rotate freely, whereas the combustion tube 1 is fixed, so that the guide roller 3 can rotate freely, and the combustion tube 1 is also equipped with a roller shaft for a belt conveyor, etc. .

In the above embodiment, an endless chain 6 which is rotationally driven by a sprocket gear 5 fixed to a drive shaft 4 is supported and guided by the guide roller 3, and a receiving plate 7 is provided on the endless chain 6 at a constant interval. A net-like conveyor bell l-B on the surface of
applied to a dryer that dries the material to be dried, which is carried on the conveyor bell I-B at a constant speed over the combustion tube 1, at the irradiation temperature of the far infrared wavelength from the combustion tube 1. There is.

In addition, M is a motor that rotationally drives the above-mentioned conveyor belt) B,
For example, ■Pulley 9 and drive shaft 4 fixed to motor shaft 8
A V-belt 11 is passed around a V-Boot IJ10 fixed to a V-Boot IJ10, and a conveyor belt B is rotated by a motor M at a predetermined speed in a predetermined direction.

Further, a constricted part 12 for flame extinguishing is provided on the air supply side C of the combustion pipe 1, and a mixing chamber 13 is connected to the upstream side of the constricted part 12, and a gas supply pipe 14 is connected to the mixing chamber 13. A mixture of fuel gas and combustion air supplied from the air supply fan F through the air supply pipe 15 is premixed in the mixture supply pipe 16 and is forcibly fed under a constant pressure, The amount of gas supplied can be freely adjusted by the pulp 17 provided in the gas supply pipe 14, and the amount of air supplied can be freely adjusted by the pulp 18 provided in the air supply pipe 15. Heater 1
9 is temporarily installed, and an exhaust pipe 20 is provided on the downstream side of the ignition heater 19.
are connected in series to form a gas transmission [combustion device].

In the gas propagation combustion device having the above configuration, the combustion mechanism will be explained next. During operation, the air-fuel mixture that is constantly forcibly fed to the mixing chamber 13 under a constant pressure passes through the flame extinguishing constriction part 12. The mixture is fed into the combustion chamber 1 and flows from the intake side C to the exhaust side, and when the tip of the mixture reaches the ignition heater 19, the tip of the mixture is ignited by the ignition heater 19. The air-fuel mixture filling the combustion chamber 1 starts combustion from the tip side and burns sequentially from the exhaust side to the air supply side C, and the flame surface a moves inside the combustion tube 1 from the exhaust side to the air supply side C. The flame propagates and heats the combustion tube 1. When the end of the flame surface a reaches the narrowed part 12, a barrier is created at the narrowed part 12 to dam the flame flow, causing a sudden change in the flow velocity to quickly and reliably extinguish the flame, and then proceed to the next cycle. This method continuously repeats the flame propagation combustion operation in which the combustion exhaust gas from the previous cycle is pushed out to the exhaust side and released from the exhaust pipe 20 to the outside of the device. The cycles of ignition, combustion, and extinguishing are repeated continuously for a time determined by conditions such as the length of the combustion tube 1, and each part of the combustion tube 1 is The method is to uniformly heat the surface of the combustion tube 1 and obtain the irradiation temperature of the far infrared wavelength from the surface of the combustion tube 1. 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 is Since the limit is 400°C to 500'C, it is possible to heat at a low temperature of about 100°C to 300°C, which is the most suitable for obtaining the irradiation temperature of far infrared wavelengths, and it is possible to reduce the fluctuation in the length direction of the combustion tube 1. It does not occur at all. Therefore, due to the propagating combustion flame, the surface temperature of the combustion tube 1 is within a specified range of far infrared wavelengths of 3 μm to 15 μm, and the fluctuation width on the intake side C and the exhaust side in that specified range is approximately 30°C. A plurality of combustions made with a length that provides a stable far-infrared wavelength irradiation temperature (for example, 250 ° C.) on the surface of the combustion tube 1 and a uniform far-infrared wavelength without fluctuation over the length direction. The tubes 1 are arranged in parallel at regular intervals and applied to a heat source such as a dryer, and each combustion tube 1 is provided with a guide roller 3 to serve as a guide for a belt conveyor or the like.

In addition, in the above-mentioned embodiment, a sprocket gear may be used instead of the guide roller, but the implementation is free.

〔Effect of the invention〕

Since this invention is configured as described above, it produces the following effects.

The combustion tube that makes up the tubular combustion chamber of the gas propagation combustion device is equipped with a guide roller such as a belt conveyor so that it can rotate freely, and the combustion tube also has a roller shaft. By adopting this method, the irradiation temperature of the far-infrared wavelength can be efficiently and uniformly obtained from each part of the surface of the combustion tube, and the irradiation temperature can be used to perform effective drying. Since the conveyance function of the drying material is simultaneously performed by a belt conveyor or the like, the apparatus is not only downsized but also structurally simplified. In addition, due to the unique combustion method called flame propagation, the irradiation temperature of far-infrared wavelengths can be used for drying, etc., so for example, gentle drying at about 100°C to 300°C is required, such as luhisket, rice crackers, coffee, tea, etc. It is useful for far-infrared drying of foods, etc.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view showing an embodiment of the gas propagation combustion apparatus according to the present invention, FIG. 2 is a cutaway front view of the main part, and FIG. 3 is a partially enlarged sectional view. A... Tubular combustion chamber, a... Flame surface, 1... Combustion tube, 2... Rotating body, B... Belt conveyor, etc., 3...
・Guide loaf.

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) A gas propagation combustion device characterized in that a guide roller (3) such as a belt conveyor (B) is provided on a combustion tube (1) constituting the combustion tube (1), so that the combustion tube (1) also has a roller shaft.