JPH0238188Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a method for vaporizing liquid fuel such as kerosene and burning it with blue flame to produce hot air for drying grains in a grain dryer. This invention relates to improvements in cooling means for the cylinder wall of a combustion cylinder in a burner.

BACKGROUND TECHNOLOGY As disclosed in Japanese Utility Model Publication No. 52-33927, the vaporizing burner of the grain dryer of the above-mentioned type usually has a bottom plate and a bottom plate of the combustion tube installed in the inner cavity of a bottomed combustion tube that is open at one end. A combustion chamber is formed to combust the combustion gas ejected from a nozzle provided in a combustion disk, and a cooling air passage is formed on the outside of the cylindrical wall of the combustion tube that surrounds the combustion chamber. The cooling air flowing around the outer circumferential side of the cylinder wall prevents the cylinder wall of the combustion cylinder from becoming red-hot and being damaged by the flames of the combustion gas.

Problems to be Solved by the Invention The above-mentioned conventional means uses a flame of combustion gas that is ejected and combusted from a nozzle nozzle provided in the combustion plate, which is the bottom plate of the combustion tube, to cause the wall of the combustion tube that surrounds the combustion chamber to In particular, the flames of the combustion gas burning in the combustion chamber come into contact with the inner circumferential surface of the cylinder wall of the combustion tube, and the cylinder wall is directly heated by the flames. There is a problem in which we are completely vulnerable to becoming like this.

The present invention was made to solve this problem that occurs in conventional means, and the present invention aims to direct the flame of combustion gas combusting in the combustion chamber from the inner circumferential surface of the cylindrical wall of the combustion tube surrounding the combustion chamber. A new technology that effectively cools the wall of the combustion tube by moving it inward, preventing the eruption flame from directly heating the wall of the combustion tube through contact. The purpose is to provide a means to do so.

Means for Solving the Problems In the present invention, as a means for achieving this purpose, a combustion disk serving as the bottom plate of the combustion tube 1 is installed in the inner cavity of the bottomed combustion tube 1 that is open at one end. The open side of the combustion tube 1 is on the suction side with respect to the hot air path 17 of the grain dryer B where the suction air acts, forming a combustion chamber 4 for combustion gas ejected from the nozzle port 3 provided in the combustion chamber 2. In the vaporizing burner A for a grain dryer that is arranged to face each other, the cylinder wall 1 of the combustion cylinder 1 is
In a, a large number of ventilation holes 6 for ventilating outside air to the inner circumferential side of the cylinder wall 1a are formed in a region surrounding the flame of combustion gas ejected from the nozzle hole 3 provided in the combustion plate 2. At the same time, a grain dryer is provided with a baffle plate 7 projecting in the shape of a brim around the four circumferences on the outer surface side of the cylinder wall 1a at a portion closer to the open side of the combustion cylinder 1 than the ventilation openings 6. This paper proposes a cooling device for the cylinder wall of a combustion cylinder in a vaporizing burner.

Function In the device of the present invention configured as described above, when the vaporizing burner A is assembled to the body of the grain dryer in a predetermined state and operated, the injection jet provided on the combustion plate 2, which is the bottom plate of the combustion tube 1, is activated. The combustion gas that is ejected and burned from the flame port 3 is pushed to the front of the open side of the combustion tube 1 due to its ejection force and the suction pressure of the grain dryer blower that sucks the hot air generated by combustion. It starts to get pulled out like it's being blown out.

At this time, the suction pressure of the blower comes to act uniformly around the combustion tube 1, but on the outer peripheral surface side of the cylinder wall 1a of the combustion tube 1, there is a baffle-like baffle-shaped air guide that protrudes toward the four circumferences. Since the plate 7 is provided to block direct suction of air from the outer circumferential side of the cylinder wall 1a, the air is sucked more strongly from inside the combustion cylinder 1.

Then, the suction pressure is applied to the outer surface of the cylinder wall 1a, which is blocked from direct suction by the baffle plate 7, through a large number of ventilation holes 6 provided in the cylinder wall 1a of the combustion cylinder 1. Air is drawn into the combustion tube 1 and drawn out.

Therefore, due to the ventilation flowing from the outer circumferential side to the inner circumferential side of the cylinder wall 1a through the ventilation port 6, combustion is ejected from the nozzle holes 3 of the combustion disk 2, which forms the bottom plate of the combustion cylinder 1, and burns. Among the gases, the flames located inside the cylinder wall 1a are drawn toward the center of the combustion cylinder 1 from a position along the inner peripheral surface of the cylinder wall 1a, and the flames are located inside the cylinder wall 1a. This prevents it from coming into contact with the inner circumferential surface of. Moreover, the cylindrical wall 1a is cooled from the outer peripheral surface to the inner peripheral surface by the flow of outside air passing through the ventilation holes 6. This prevents the cylindrical wall 1a from being red-hot, oxidized, and damaged.

Embodiments Next, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a vaporizing burner A of a grain dryer in which the present invention can be implemented. 1 has the upper end open and the cylinder wall 1
A is a dish-shaped combustion tube formed in steps, and 2 is a hollow disc-shaped combustion disk having a large number of nozzles 3. This combustion disk 2 is fitted into the middle of the inner cavity of the combustion tube 1. The open side of the combustion tube 1 is partitioned into a combustion chamber 4, and the bottom side is partitioned into a gas chamber 5.

In the combustion cylinder 1, a large number of ventilation holes 6 are formed in the cylinder wall 1a of a portion forming the combustion chamber 4 on the inner peripheral surface of the cylinder wall 1a for ventilating outside air. That is, a rectangular ventilation hole 6 is provided in the cylinder wall 1a on the peripheral side.
In addition, arc-shaped ventilation holes 6b are formed in the cylindrical wall 1a of the stepped portion. A baffle plate 7 is provided on the outer peripheral surface side of the cylinder wall 1a of the combustion cylinder 1, and protrudes like a brim from the upper end, which is the open end, toward the four circumferences. Cylinder 1
The outer circumferential side of the portion of the combustion tube 1a where the ventilation holes 6a are provided is shielded from the upper side of the combustion tube 1.

Reference numeral 8 denotes a bowl-shaped vaporizing cylinder with an open lower end, whose inner cavity communicates with the gas chamber 5, is rotatably supported at the center of the combustion disk 2, and is connected to a motor 9.
Reference numeral 10 denotes a blower tube formed on the bottom side of the combustion tube 1 and facing into the vaporization tube 8. Reference numeral 11 denotes an oil supply pipe, the tip of which approaches the inner circumferential surface of the vaporizer cylinder 8. 12
1 is a wind barrel, 13 is a blower, and 14 is a spark plug.

Figure 3 shows how this vaporizing burner A is connected to the grain dryer B.
The figure shows the state in which it is installed. This grain dryer B has a vaporizing burner A on one side of the machine body 15,
A blower 16 for sucking the hot air from the vaporizing burner A is installed on the other side, and these are connected through a hot air passage 17 installed inside the fuselage 15. The upper part of the body 15 is filled with the upper conveyor 20 and the equalizer 21, and it is allowed to flow down through the hot air path 17, which is a drying part, and then returned to the upper part of the body 15 by the lower conveyor 22 and the elevator 19, etc. for circulation. It dries. b indicates a grain.

The liquid fuel injected from the fuel supply pipe 11 is then diffused into a film and vaporized by the vaporizer tube 8 rotating at high speed, and is sent to the gas chamber 5 together with the primary air blown out from the blower 13, and is sent to the combustion chamber 5. The flame is ejected vigorously from the nozzle 3 of 2, and burns as a blue flame in the combustion chamber 4.

The flames burning in the combustion chamber 4 are generated by the suction pressure of the blower 16 of the grain dryer B, and the air guide plate 7 directs the outside air from the outer circumferential side of the cylinder wall 1a to the ventilation opening provided in the cylinder wall 1a. 6a... By sucking from the inner peripheral side of the cylinder wall 1a, the ventilation opening 6 at that time
Due to the ventilation passing through a..., it becomes separated from the inner circumferential surface of the cylindrical wall 1a. The cylinder wall 1a is cooled down to the inner circumferential surface by this ventilation.

Effects of the invention Since the present invention has the configuration as described above, the cylinder wall 1a of the combustion cylinder 1 is When the air on the outer peripheral side is sucked, direct suction is blocked by the baffle plate 7 on the outer peripheral surface of the cylinder wall 1a,
Since suction is drawn from the inner peripheral side of the cylinder wall 1a through the ventilation hole 6 provided in the cylinder wall 1a, the air is drawn from the outer peripheral side of the cylinder wall 1a into the inner peripheral part of the cylinder wall 1a through the ventilation hole 6. A flow of outside air is generated that blows into the circumferential side, and due to the ventilation of this outside air flow, out of the flames of combustion gas burning in the combustion chamber 4, the flames along the inner circumferential surface of the cylinder wall 1a are The cylinder wall 1a is pulled away from the inner circumferential surface, preventing the cylinder wall 1a from becoming red hot when it comes into contact with the erupting flame, and at the same time, the ventilation cools the cylinder wall 1a from both the inside and outside, reducing the red heat of the cylinder wall 1. Effectively prevents damage caused by oxidation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal side view of the main part, Fig. 2 is a plan view, and Fig. 3 is a longitudinal sectional side view showing the state in which it is installed in a grain dryer. be. Explanation of drawing symbols, A... vaporizing burner, B...
Grain dryer, b...grain, 1...combustion cylinder, 1a...
...Cylinder wall, 10...Blower tube, 11...Oil supply pipe, 12
... Wind barrel, 13 ... Air blower, 14 ... Spark plug, 15 ... Airframe, 16 ... Air blower, 17 ... Hot air machine, 18 ... Hopper, 19 ... Elevator, 2 ...
Combustion plate, 20... Upper conveyor, 21... Equalizer, 2
2...lower conveyor, 3...flame nozzle, 4...combustion chamber,
5... Gas chamber, 6... Ventilation port, 6a... Rectangular ventilation port, 6b... Arc-shaped ventilation port, 7... Air guide plate, 8
...Carbonizer, 9...Motor.

Claims (1)

[Scope of utility model registration request] A combustion chamber 4 is formed in the inner cavity of a bottomed combustion tube 1 that is open at one end, and the combustion gas is ejected from a combustion nozzle 3 provided in a combustion plate 2 serving as the bottom plate of the combustion tube 1. Hot air path 17 of grain dryer B where wind acts
On the other hand, in a vaporizing burner A for a grain dryer in which the open side of the combustion tube 1 is arranged so as to face the suction side, the cylinder wall 1a of the combustion tube 1 has a jet flame provided on the combustion disk 2. A large number of ventilation holes 6 for ventilating outside air are formed on the inner peripheral side of the cylinder wall 1a in a region surrounding the flame of combustion gas ejected from the port 3, and
A vaporizing burner for a grain dryer, which is provided with a baffle plate 7 projecting in a brim shape toward all four circumferences at a portion closer to the open side of the combustion tube 1 than the ventilation openings 6 on the outer surface side of the cylinder wall 1a. A cylinder wall cooling device for a combustion cylinder.