JPS63220010A - Fuel burning equipment for drier - Google Patents

Abstract

PURPOSE:To make a fuel burning equipment compact as a whole and to prevent an air filter from burning, by setting the long side of an air filter in the upper part of an air duct in the direction crossing the flow of feed air, and by positioning the air suction pipes extended from both ends of an air filter in a zone respectively except the zone over the combustion flames of a burner. CONSTITUTION:A filter case 24a is set in the upper part of an air duct 15 so as to directly cross the feeding direction of air. The middle part of a filter case 24a is connected to the suction port of a fan 20. Suction pipes 25, 25 are respectively extended from both ends of a filter case 24a in the feeding direction of air through the air duct 15, being inclined downward. The starting ends of suction pipes 25, 25 are opened to the directions opposite to the feeding direction of air, and are positioned on both right and left sides of the flames of a burner 8, avoiding the zone in front of and over the flames. Kerosene is stirred and is atomized by a heating cup 17 rotating at high velocity, being gasified by the air fed by the fan 20 through the suction pipes 25, 25 the air filter 24, and an air duct 22, and being burned on an outer cylinder 21. Because the air filter 24 is set in the air duct 15, the title equipment can be made compact as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion device for a dryer that can be used in a grain dryer or the like.

[Prior Art] For example, the combustion device of the conventional grain dryer is
There is a publication No. 200123. In this conventional device, a burner having a heating bowl for stirring kerosene is arranged in a ventilation tube through which dry air flows, and when the primary combustion air of the burner is drawn from the combustion side of the burner in the ventilation tube, - Combustion air is sucked in by a fan in the direction opposite to the direction in which the drying air flows, and air warmed by the burner is sent to the burner for combustion.

[Problems to be Solved by the Invention] Therefore, in the present invention, a burner having a heating bowl for stirring kerosene is disposed in a ventilation tube through which dry air flows, and the primary combustion air of the burner is In a combustion device for a dryer in which combustion air is sucked in from the combustion flame side and a fan is used to suck in secondary combustion air in the direction opposite to the direction in which the drying air flows, an air filter and its suction tube are rationally installed in this ventilation tube. This arrangement aims to prevent the air filter from burning out and purify the air warmed by the burner while supplying it to the burner.

[Means for solving the problem] The technical means for solving this technical problem is to install a heating bowl 17 for stirring kerosene in a ventilation tube 15 through which dry air flows.
In a combustion device in which a burner 8 having The drying method is characterized in that the suction pipe 25 is disposed in the ventilation pipe 15 along the direction of the air filter 24, and the suction pipe 25 extending from the end of the air filter 24 is located in a part other than the upper part of the combustion flame of the burner 8. The structure was adopted as an aircraft combustion device.

[Operations and Effects of the Invention] The burner 8 has a heating bowl 17 for stirring kerosene, which is located in a ventilation pipe 15 through which drying air flows.

Suction cylinder 25. Combustion is carried out by the air sucked in through the air filter 24, and since the air filter 24 for air purification is disposed within the ventilation pipe 15 through which dry air flows, the entire combustion device can be downsized. In addition, since the suction port of the suction tube 25 from the air filter 24 is opened on the combustion side of the burner 8 and away from above the flame, the drying air flowing inside the ventilation tube 15 is Even if ventilation is interrupted due to a failure of the exhaust fan, flames will not enter the air filter 24 from the suction port of the suction tube 25, and burnout of the air filter 24 can be effectively prevented.

[Example] Embodiments of the invention shown in the drawings will be described below.

First, the configuration of the embodiment will be explained. 1 is.

This grain dryer 1 is a circulation type grain dryer, and has a storage tank 2. A drying room 3 and a grain collection room 4 are arranged sequentially from the top to the bottom, and the grains in the storage tank 2 flow down on the lower left and right abutment plates 5, 5 and the center abutment plate 6, while flowing into the lower drying room 3. The drying passages 3a, 3a are guided to a plurality of drying passages 3a, 3a, and exhaust passages 3c, 3c are provided on both left and right sides of the drying passages 3a, 3a.
A hot air path 3b is arranged near the center of 3a.

Further, an exhaust fan 7 is disposed at the end of the exhaust air passages 3c, 3c, and the air heated by the burner 8 is transferred from the hot air passage 3b to the drying passages 3a, 3a. The drying paths 3a, 3a
The structure is such that the grains inside are subjected to a drying action, and the hot air after the drying action is discharged to the outside of the machine through exhaust passages 3c, 3c.

Below the plurality of drying paths 3a, 3a in the grain collecting room 4.

Drying path 3a, feeding valve 9.9 for feeding out grains in 3a
The grains fed out by the feeding valves 9, 9 are transported by a lower helical transfer device 10, which is constructed at the bottom of the grain collecting room 4, to an elevator 11, which is arranged on one side of the machine. It is transported to the lower part.

The grains conveyed to the lower part of the elevator 11 are further
The grain is fried in the elevator 11, passes from the upper part of the elevator 11 to the upper helical transfer device 12 and the diffusion bag M13,
It is configured so that it is spread and spread into the storage tank 2.

14 is a burner box in which the burner 8 is housed. Inside this burner box 14, drying air flows through the burner 8.
The ventilation tube 15 is arranged horizontally so that the air flows from the side to the exhaust fan 7 side.
A burner 8 is supported in the center of the ventilation tube 15 via a support member 16. This burner 8 is a known gasification burner, and the heating bowl 17. A motor 18 with adjustable rotation speed that rotates the heating bowl 17. Kerosene supply bag for supplying fuel to heating bowl 17 @19. Blower 20 for supplying combustion air to heating bowl 17. It is composed of an outer cylinder 21 and the like that burns the gas vaporized in the heating bowl 17.

The blower 20 of the burner 8 is disposed at the upper part of the ventilation pipe 15, and the blower opening of the blower 20 is connected to the inside of the burner case 23 via a bendable blower pipe 22. Further, an air filter 24 is connected to the suction port of the blower 20.

This air filter 24 has a long filter case 24a.
, a filter material 24b inside a filter case 24a, which is disposed at the upper part of the filter case 24a so as to be orthogonal to the ventilation direction of the ventilation pipe 15, and its middle part is connected to the suction port of the blower 20. From both ends of the filter case 24a, suction parts 25 and 25 respectively extend obliquely downward in the direction of air blowing inside the ventilation tube 15, and the starting end of the suction tube 25. , which open toward the downstream side of the air blower and are located in front of the flame of the burner 8 and on both left and right sides, avoiding the upper part.

Note that the suction cylinder 25 connected to the air filter 24 is -
If the amount of air for the next combustion is small, - pieces may be sufficient.

Reference numeral 26 denotes an inlet wind pipe that is constructed at the terminal end of the ventilation pipe 15 and communicates with the hot air path 3b of the drying chamber 3.

This inlet wind pipe 26 is arranged concentrically opposite to the combustion side of the burner 8, and is located at the starting ends 25a, 25 of the suction pipes 25, 25.
a is arranged opposite to the edge of the circular inlet wind pipe 26.

Note that 27 is a control box for the blower 20;
8 is a motor that can rotate while adjusting the rotation speed of the blower 20, 29 is a supply pump that constitutes the kerosene supply device 19, 30 is a supply pipe, and 31 is a valve. In addition, if the filter material 24b is made of a noncombustible material made of ceramic paper, even if the exhaust fan 7 breaks down and the ventilation in the ventilation tube 15 is interrupted and the flame of the burner 8 burns upward, the air filter 24 will be burnt out. This is advantageous because it can prevent this.

In addition, an inspection lid (not shown) that can be opened and closed is attached to the lateral side of the air filter 24 in the burner box 14 and the ventilation pipe 15, so that the air filter 24 can be inspected. In addition, the burner box 14 and the ventilation pipe 1
5 ventilation holes are opened in the left and right side surfaces and the lower side surface of 5. In addition.

The burner box 14 may also be configured to serve as the ventilation tube 14.

32 is a thermostat which is disposed in front of the burner 8 in the upper part of the ventilation pipe 15 and above the suction port of the suction pipe 25.25.Due to a malfunction, the rotation of the exhaust fan 7 is interrupted and the flame of the burner 8 is interrupted. When it flares up, thermostat 3
2 is what is detected. This detection result is input to the control box 20 to operate the supply pump 29 or the valve 3↓ to stop the supply of kerosene to the burner 8 and interrupt the combustion of the burner 8. Note that 37 is an ignition device.

Reference numeral 33 denotes a resistance plate, and this resistance plate 33 is located at the bottom of the ventilation tube 15, and the ventilation pipe 2 is located at the top of the ventilation tube 15.
2. Since the suction pipe 25.25 is located and the wind force is weakened from the lower part, in order to balance this, it provides resistance to the wind at the lower part, and the combustion flame of the burner 8 and the inlet wind pipe 26
Aiming for concentricity.

゛ This is intended to introduce uniform hot air into the inlet wind pipe 26. This resistance plate 33 is located inside the ventilation tube 15,
Ventilation pipe 22 that obstructs ventilation. Of course, the arrangement position differs depending on where the suction cylinders 25, 25, etc. are located.

7th (!l) and 34 shown in Figure 8 are the flame chamber panels.

This flame chamber board 34 is located above the base of the flame emitted from the burner 8 and is supported by a support member 35 made of a shape memory alloy. When the temperature of the flame chamber panel 34 becomes high, the support member 35 made of a shape memory alloy bends downward to prevent the flame from expanding upward, and the combustion amount of the burner 8 is reduced. The flame becomes smaller and the flame chamber panel 3
When the temperature of the part 4 decreases, the support member 35 made of a shape memory alloy bends upward to help the flame exit in the ventilation direction, thereby making the flame concentric with the inlet wind pipe 26. There is. Note that this flame chamber board 34 has a remarkable effect when the resistance plate 33 is not provided.

Next, the operation of the embodiment will be explained. When drying grain, the grain is put into the loading hopper 36, the grain is fried by the elevator 11, and then transferred to the upper helical transfer device 12. After passing through the diffusion device 13, the storage tank 2
It is thrown into the storage tank 2 while being diffused. When the grains loaded in the storage tank 2 flow downward and pass through the drying paths 3a, 3a of the drying chamber 3.

From the hot air path 3b, the drying path 3a passes through the exhaust air path 3c,
The hot air flowing to 3c receives a drying effect, and the hot air after the drying effect is discharged to the outside of the machine from the air exhaust passages 3c, 3c.

After drying, the grain is transferred to each drying path 3a by the lower delivery valves 9, 9.
, 3a in the same amount, and are conveyed to the elevator 11 by the lower helical transfer device WlO below, and further transported to the elevator 11. Upper spiral transfer device 12. It is transported to the storage tank 2 through the diffusion device 13 and circulated therein, and the drying work is completed by repeating such a circulation process several times.

Next, the combustion state of burner 8 will be explained.

The motor 18 that rotates the heating bowl 17 and the motor 28 that rotates the blower 20 are energized to rotate the heating bowl 17 and the blower 20 . Then, kerosene is supplied to the supply pump 29. valve 31
is supplied to the heating bowl 17 through the heating bowl 17 rotating at high speed, where it is agitated and atomized while being blown away by centrifugal force, and then agitated and atomized by the blower 20 into the suction tube 25. The kerosene that is atomized by the air sent through the air filter 24 and the blow pipe 22 is gasified and burned in the outer tube 21 as a blue flame. When the blower 20 sucks the primary combustion air, air that is about 10 to 15 degrees C higher than the outside air temperature is sucked in from the intake port of the suction tube 25, and while being purified by the air filter 24, the burner 8 It is supplied to the plant and burns well.

In addition, when drying grains, the amount of ventilation increases or decreases depending on the amount of grain.
Since the suction port 5 is disposed opposite to the edge of the inlet wind pipe 26 communicating with the hot air path 3b of the drying chamber 3, the suction port 2
5. From the suction port 25, air is drawn from both the part of the inlet wind pipe 26 where the negative pressure is stronger inward from the edge and the part where the negative pressure is weaker on the outer peripheral side from the edge of the inlet wind pipe 26. As a result, the amount of intake air is averaged, and it is possible to prevent flame floating due to an excessive amount of intake air or combustion with red flame due to an insufficient amount of intake air, thereby achieving good combustion.

As mentioned above, the burner 8 has the heating bowl 17 for stirring kerosene, which is located in the ventilation pipe 15 through which drying air flows.
Suction cylinder 25. Combustion is carried out by the air sucked in through the air filter 24, and since the air filter 24 for air purification is disposed within the ventilation pipe 15 through which dry air flows, the entire combustion device can be downsized. It is possible.

In addition, since it is arranged at the top of the ventilation tube 15 through which the drying air flows, combustion air can be sucked from the part of the drying air where there is less dust, and maintenance of the air filter 24 can be carried out while maintaining good combustion. It is possible to reduce the number of times.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is a cutaway front view, and Fig. 4 is a front view.
5 is a cutaway side view, FIG. 5 is a cutaway front view, FIGS. 6 and 7 are side sectional views and front views showing the burner portion, and FIGS. 8 and 9 are views of other embodiments. FIG. 2 is a cutaway side view and a cutback rear view showing an example. [Explanation of symbols] 1 Grain dryer 2 Storage tank 3 Drying room
3a Drying path 3b Hot air path 3
C ventilation duct 4 Grain collection room 5 Left/right side panel 6 Center panel 7 Exhaust fan 8 Burner
9 Feeding valve 10 Lower helical transfer device 11 Elevator 12 Upper helical transfer device 12a Upper helix 12b Upper helical gutter 1
3 Diffusion device 14 Burner box 15 Ventilation pipe 16 Support member 17 Heating bowl
18 Motor 19 Kerosene supply device 20 Blower 21 Outer tube 22 Blower pipe 23 Burner case 24 Air filter 25 Suction tube
26 Artificial wind pipe 27 Control box 28 Motor 29 Supply pump 30 Supply pipe 31 Valve 32 Thermostat ・
33 Resistance plate 34 Flame chamber inner board 35 Support member 36 Staking hopper 37 Ignition device No. 5 ``Fig. 16 7j), j0

Claims (1)

[Claims] [1] A combustion device in which a burner 8 having a heating bowl 17 for stirring kerosene is disposed in a ventilation pipe 15 through which dry air flows, and the primary combustion air of the burner 8 is sucked from the combustion flame side in the ventilation pipe 15. , the air filter 24 is disposed in the ventilation tube 15 in the longitudinal direction above the ventilation tube 15 and along the direction intersecting the air blowing direction, and the suction tube 25 extending from the end of the air filter 24 is disposed in the ventilation tube 15 in the longitudinal direction. A combustion device for a dryer, characterized in that it is located in a part other than the upper part of the combustion flame of a burner 8.