JPH0126449B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a combustion disk for a burner.

[Prior art and problems to be solved by the invention] Liquid fuel is gasified in a rotating vaporization cylinder, and the gasified fuel is ejected from the spout of a combustion disk located on the outer circumferential side of the vaporization cylinder and combusted. A chemical burner is known, for example, from Japanese Utility Model Application Publication No. 175734/1983.

When such a gasification burner is used in a grain dryer with a relatively large amount of drying air, the flame ejected from the outlet on the outer periphery of the combustion disk will sway due to the influence of the drying air passing around the outer periphery of the combustion disk. , there is a problem that combustion becomes unstable.

Therefore, as a conventional technique that attempts to solve such problems, there is Japanese Utility Model Application Publication No. 55-175734, in which the open end of the combustion tube is bent inward to narrow the opening diameter. A technique has been proposed to prevent incomplete combustion.

However, if this conventional technology is used in the burner of a grain dryer, the influence of the relatively strong drying wind on the outer periphery is reduced and good combustion can be achieved, but the area of the flame on the combustion disk is There was a problem that heating and mixing of the drying air passing through the outer periphery became insufficient.

Therefore, the present invention provides a burner that gasifies fuel and burns it while ejecting it forward from a nozzle provided in a combustion disk. The purpose is to maintain a good mixing state with the drying air while also stabilizing the combustion flame to maintain good combustion, thereby solving the drawbacks of the prior art.

[Means for Solving the Problems] In order to solve the above-mentioned technical problems, the present invention has a configuration of a combustion disk of a burner that combines the following requirements.

a. The combustion tube 2 is placed in the ventilation passage 1 through which the drying air passes, so that the outer peripheral surface of the combustion tube 2 is exposed to the drying air.

b. A fuel injection chamber 6 with injection holes 4, 4, . . . for ejecting fuel forward is provided in the inner circumferential portion of the combustion tube 2.

c. A heating body 7 made of a porous member is placed on the front side of the outer circumference of the fuel injection chamber 6 at a predetermined interval.

[Operations and Effects of the Invention] The gasified fuel is ignited and burned while being ejected forward from the injection holes 4, 4, . It is carried to the front side of the combustion tube 2 by the dry wind of the passage 1. At this time, even if the part of the combustion tube 2 facing the ventilation passage 1 attempts to be cooled, the flame is suppressed and kept warm by the heating element 7 made of a porous member, so the combustion tube 2 is cooled. less likely to be
Therefore, the gasified fuel in the fuel injection chamber 6 is
It is difficult to liquefy and maintains a complete combustion state with little red flame combustion.

That is, when the heating body 7 made of a porous member becomes red-hot by the flame, heat is transferred from the heating body 7 to a part of the combustion tube 2, preventing cooling of the fuel injection chamber 6, and Rather, the gasified fuel in the fuel injection chamber 6 is heated to maintain good gasification and complete combustion.

Moreover, since the heating body 7 made of a porous member is positioned at a predetermined interval on the front side of the outer peripheral part of the fuel injection chamber 6, the ejection ports 4, 4 of the fuel injection chamber 6,
The ejection of gasified fuel from ... is suppressed, the rise of the flame from the ejection port 4 is shortened, and the lower part of the flame is supported by the heating element 7 composed of a red-hot porous member. This reduces flame fluctuation and stabilizes combustion. Moreover, since the flame also rises from the heating element 7, the combustion area is equal to the injection ports 4, 4, etc. of the fuel injection chamber 6 and does not decrease, so the dry air passing through the outer circumferential side The mixture also becomes better.

[Example] Examples of the present invention will be described below.

First, the configuration of the embodiment will be explained.

Reference numeral 1 denotes a ventilation passage through which drying air passes, and the combustion tube 2 is disposed in the ventilation passage 1 so that the outer peripheral surface of the combustion tube 2 is exposed to the drying air. In the inner peripheral part of this combustion tube 2,
A fuel injection chamber 6 is provided with injection holes 4, 4, . . . for ejecting fuel forward. On the front side of the outer periphery of the fuel injection chamber 6, heating bodies 7 made of a porous member are arranged at predetermined intervals.

Reference numeral 8 denotes a case in which the motor 9 is housed, and the rear part of the dish-shaped combustion tube 2 is fixed to the front end of the case 8, and a conical shape facing forward is attached to the center part of the inner circumferential side of the combustion tube 2. A blower tube 10 is made to protrude. and,
The rear base end side of the blower tube 10 is attached to a case 8, and the rear end of the case 8 is provided with a communication port 11 through which a portion of the hot air is introduced. This communication port 1
1, hot air can be sent through a pipe or the like. A carburetor cylinder 13 is attached to the front end of the shaft 12 of the motor 9.
The proximal end of the front side is attached. The vaporizer tubes 13 are provided on the outer circumferential side of the blower tube 10 at predetermined intervals. In addition, this vaporizer cylinder 13
has a conical shape with a smaller diameter on the front side, which is the proximal end side. A vaporizing air passage 14 is formed between the inner circumferential surface of the vaporizing tube 13 and the outer circumferential surface of the blower tube 10, and a rear end portion of this vaporizing air passage 14 is communicated with the fuel injection chamber 6. This fuel injection chamber 6 is constituted by an inner peripheral side rear plate portion 3 of the combustion tube 2 and a combustion disk 5 fixed to the front side thereof.

The combustion disk 5 is located on the outer circumferential side of the rear end of the vaporizer cylinder 13, and has a large number of jet holes 4, 4, . The jet ports 4, 4, of the combustion disk 5
The relationship is red-hot due to the flames from...
The outer periphery of the heating body 7 is fixed to a location as close as possible to the fuel injection chamber 6 on the inner periphery side of the combustion cylinder 2.

A nozzle 15 for supplying fuel is visible inside the blower tube 10. An ignition heater 16 is provided on the outer periphery of the combustion tube 2. 17 is a sensor 17 that detects the presence or absence of flame.

Next, the operation of the embodiment will be explained.

Outside air for drying the grains is ventilated forward through the ventilation passage 1, and the motor 9 is driven to rotate, and the air is blown into the case 8 from the communication port 11. The wind from the case 8 passes through the blower tube 10 and the vaporization air passage 14 reaches the fuel injection chamber 6, and then reaches the injection holes 4, 4, of the combustion plate 5.
It is ejected from ... toward the front inside the combustion tube 2. At this time, when fuel is ejected from the nozzle 15, it is gasified in the vaporization air passage 14 as the vaporization cylinder 13 rotates, and the gasified fuel is ejected from the injection hole 4 of the combustion disk 5,
4. It erupts from...

The flame in front of the combustion disk 5 turns blue when it is completely burned, but a part of this flame burns the heating element 7.
becomes red-hot, and this heat heats the inner peripheral side rear plate portion 3, which is a part of the combustion cylinder 2, and also heats the outer peripheral portion of the fuel injection chamber 6. Therefore, even if cold air passes through the outer periphery, the heated combustion cylinder 2 prevents the fuel injection chamber 6 from being overcooled.

[Brief explanation of drawings]

The drawings show embodiments of the invention.
The figure is a side sectional view, Figure 2 is a front view, and Figure 3 is a
It is a partially enlarged sectional view. [Explanation of symbols], 1... Ventilation path, 2... Combustion tube,
3...Inner circumferential rear side plate portion, 4...Ejection port, 5...Combustion plate, 6...Fuel injection chamber, 7...Heating body, 8...
Case, 9...Motor, 10...Ventilator, 11...
...Communication port, 12...shaft, 13...vaporizer cylinder, 14...
...Carbonizer air passage, 15... Nozzle, 16... Ignition heater, 17... Sensor.

Claims (1)

[Claims] 1. A burner combustion disk having the following requirements. a. The combustion tube 2 is placed in the ventilation passage 1 through which the drying air passes, so that the outer peripheral surface of the combustion tube 2 is exposed to the drying air. b. A fuel injection chamber 6 with injection holes 4, 4, . . . for ejecting fuel forward is provided in the inner circumferential portion of the combustion tube 2. c. A heating body 7 made of a porous member is placed on the front side of the outer circumference of the fuel injection chamber 6 at a predetermined interval.