JPH0372888B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an evaporative burner for grain drying equipment.

(Prior Art) The conventionally known Japanese Patent Application Laid-open No. 146066/1987 describes a grain drying device provided with a ventilation pipe and an exhaust pipe.

In addition, in the conventionally known Japanese Utility Model Application No. 56-128906 (Utility Application No. 55-25185), a blower tube is provided with a dedicated blower for blowing combustion air inside. a vertically oriented air outlet is formed in the air outlet, a plate body and a blowing tube are attached to the upper surface of the blowing hole, and a vertical rotation shaft of the motor is inserted through the centers of the blowing hole, the plate body, the blowing tube and the blower; A heating element is fixed to the upper end of the vertical circuit shaft, a combustion chamber is formed on the outer periphery of the dish body, the outer periphery of the combustion chamber is surrounded by an inner cylinder, and a gasification chamber is provided with a certain gap around the outer periphery of the inner cylinder. It is described that a gasification chamber is formed and the periphery of the gasification chamber is surrounded by an outer cylinder.

In addition, conventionally known Japanese Utility Model Application No. 55-46949 (Utility Application No. 53-129474) discloses a vertical blower installed inside a dedicated blower for blowing combustion air to the outer lower part of the horizontal ventilation tube. A blower tube is provided, a vertically oriented blower port is formed in the upper part of the blower tube, a dish body having a through hole in the center and a blower tube are attached to the upper surface of the blower hole, and the blower tube, the plate body and the blower tube are attached to the top surface of the blower tube. A vertical rotating shaft 17 of the motor is inserted through the center of the vertical rotating shaft, a heating element surrounding the blowing cylinder is fixed to the upper end of the vertical rotating shaft, and the side outer periphery of the dish body is surrounded by an outer cylinder to form a combustion chamber. However, it is described that a hot air mixing cylinder is provided above the outer cylinder.

(Problems to be Solved by the Invention) Among the above-mentioned known examples, the one published in Japanese Patent Application Laid-Open No. 146066/1989 does not mention a vaporizing burner, and, like the conventional circulation humidity control type grain drying equipment, the Since strong winds of 1 to 2 m ³ /sec or more are used, there is a problem that when the amount of oil is reduced to make the flame smaller, the wind hitting the flame is too strong and causes a misfire.

In addition, the device described in Japanese Utility Model Application Publication No. 55-46949 has an inner tube surrounding the dish body and the inverted bowl body to form a combustion chamber within the inner tube, and a combustion chamber between the inner tube and the outer tube. Since the gasification chamber is formed, there is a problem that the inner cylinder and the plate body are abnormally heated.
Since there is no hot air mixing cylinder, when applied to a circulation humidity control type grain dryer, there is also the problem that the wind hitting the flame is too strong, causing misfires.

Also, Publication No. 128906 (Utility Model Application Publication No. 1987-128906)
25185), the outer cylinder surrounding the combustion chamber has an exposed structure, so it is cooled by more air from the ventilation tube than necessary, and the fuel is not gasified sufficiently. Since the tube, the plate body, and the blowing tube are arranged on the same axis, there is also a problem that the entire structure becomes large and becomes resistant to the drying air inside the ventilation tube. Furthermore, since the hot air mixing cylinder is a simple cylinder, there is also the problem that the hot air produced by the flame in the dish and the dry air in the ventilation cylinder are unevenly joined together.

(Means for Solving the Problems) Therefore, the present invention provides a blower tube 12 which is provided with a dedicated blower 33 for blowing combustion air at the lower part of the outer side of the horizontal ventilation tube 9. A vertically oriented air outlet 36 is formed in a part of the air outlet 36 , and a dish body 22 having a through hole in the center and a blow-out tube 14 are attached to the upper surface of the blow outlet 36 . The vertical rotation shaft 17 of the motor 16 is inserted through the center of the vertical rotation shaft 17, and an inverted bowl-shaped heating bowl 18 surrounding the blow-off tube 14 is fixed to the upper end of the vertical rotation shaft 17, and the side outer periphery of the dish body 22 is directed downward. A hot air mixing device is surrounded by an outer cylinder 27 concentrically with an annular gap 28 communicating with the outside so that more cooling air is supplied, and the upper part of the outer cylinder 27 has ventilation holes 37 on the circumference. The grain drying device vaporizing burner is provided with a cylinder 29 and configured such that the cooling air flows into the hot air mixing cylinder 29 through the gap 28.

(Example) An example of the present invention will be described with reference to drawings. An example in which a vaporizing burner is attached to a grain drying device is shown.
1 is a humidity control tank provided at the top of the grain drying device. Humidification of grains refers to the balancing of moisture between the dry epidermis and the moist interior.

The lower part of the humidity control tank 1 is formed into funnels 2, 2, and the lower ends of the funnels 2, 2 are connected to the upper ends of the down-flow type grain drying chambers 3, 3. In the embodiment, a down-flow grain drying chamber 3 is connected to a humidity control tank 1,
The humidity control tank 1 and the down-flow grain drying chamber 3 are integrated, but they may be separate.

A hot air supply chamber 4 is formed between the left and right pair of downstream grain drying chambers 3, 3, and hot air exhaust chambers 5, 5 are provided outside each of the downstream grain drying chambers 3, 3.
is formed.

A rotary valve 6, 6 is attached to the lower end of each of the downflow type grain drying chambers 3, 3, the lower side of the rotary valve 6, 6 is surrounded by a receiving gutter 7, and a screen is provided on the upper surface of the center of the receiving gutter 7. A screw conveyor 8 is installed horizontally, and the grains sent by the screw conveyor 8 are circulated by an elevator to be piled up and returned in a humidity control tank 1.

FIG. 2 is a cross-sectional view of FIG. The wind tube 10 is attached.

A fan 11 is installed in the exhaust pipe 10, and when the fan 11 rotates, it circulates hot air into the down-flow grain drying chambers 3, 3 as shown by arrows in FIG. The fan 11 is very powerful and sends at least 1 to 2 m ³ /sec of air per ton of unhulled rice.

A vaporizing burner is installed inside the ventilation tube 9 as shown in FIG. Lower wall 3 of ventilation pipe 9
A blower tube 12 having a built-in blower 33 is attached to a lower position of the blower 2 . A blowing tube 14 is made to project upward from the upper end of the upper side 13 of the blowing tube 12.
Reference numeral 15 denotes an opening at the upper end of the blow-off tube 14 .

A motor 16 is attached to the lower part of the upper side 13 of the blower tube 12, and the vertical rotation shaft 17 of the motor 16 vertically ascends inside the blower tube 12, passes through the center of the blower tube 14, and reaches the opening. The heating bowl 18 is protruded above the heating bowl 15 and has an inverted bowl shape.

At a position corresponding to the bottom of the heating bowl 18 at the upper end of the vertical rotating shaft 17, a diffuser 19 is attached whose diameter increases toward the upper end. Reference numeral 20 indicated by a dashed line is a pipe of a kerosene supply device, the tip of which is open facing the diffuser 19 .

A gap 21 is formed between the blow-off pipe 14 and the heating bowl 18 over the entire circumference.

22 is a dish body with a through hole formed in its bottom;
A plate body 22 is placed on the upper surface of the blower tube 12, and the blower tube 14 is placed and fixed on top of the plate body 22.

23 is a gasification chamber within the dish body 22, 24 is the same combustion plate, 25 is a combustion chamber on the combustion plate 24, and 26 is a ceramic heater.

An annular gap 28 is formed on the outer side of the plate body 22 and is concentrically surrounded by an outer cylinder 27.

A hot air mixing cylinder 29 having holes (the number of holes is arbitrary) 37 on the circumferential surface is attached to the upper part of the outer cylinder 27. The hot air mixing tube 29 is installed in the ventilation tube 9, and the ventilation tube 9 has a structure that blows out sideways with respect to the hot air mixing tube 29. 13 is a non-air outlet, and 30 is an air outlet.

On the outlet 30 side of the lower wall 32 of the ventilation pipe 9,
The suction port 31 of the blower 33 is opened, and a part of the air blown inside the ventilation pipe 9 is sucked by the blower 33. 3
4 is a variable motor for the blower 33;
Attach it to the outside of the The annular gap 28 communicates with the outside through a communication port 35 opened in the lower wall 32.

(effect) Next, we will discuss the effect.

When undried undried rice is supplied to the loading port of the elevator, the undried rice is fried and falls under its own weight in the humidity control tank 1, and then stored in the down-flow grain drying chambers 3, 3, and then transferred to the funnels 2, 2. and the inside of the humidity control tank 1.

If you turn on the switch in this state, the exhaust pipe 1
The fan 11 is rotated by energizing the motor that rotates the fan 11 installed in the rice cooker, and a drying air of 1 to 2 m ³ /sec or more per ton of unhulled rice is supplied to the unhulled rice.

Further, the motor 16 that rotates the heating bowl 18 and the variable motor 34 that rotates the blower 33 are energized to rotate the heating bowl 18 and the blower 33.

When a desired amount of kerosene is supplied from the kerosene supply device 20, the kerosene is supplied to the diffuser 19, which rotates at 2500 revolutions per minute, and is blown away by centrifugal force, turning into mist.

The blower 33 blows the combustion air there to gasify it, but since the blower 33 of the present invention is rotated by a variable motor 34, the optimum combustion air is generated depending on the state of gasification. Gasification is always carried out reliably regardless of the amount of kerosene.

In this way, the gas becomes a complete mixture in the gasification chamber 23 and is injected into the combustion chamber 25 outside (above) the combustion plate 24 .

Therefore, when the ceramic heater 26 is energized, it is easily ignited and combusted like ordinary gas, and the heating bowl 18 is heated from the outside by the flame. Then, the kerosene on the inner surface of the heating bowl 18 becomes more and more actively gasified and finally burns as a blue flame.

This blue flame moves upward from the inside of the combustion chamber 25, but the outer periphery of the dish body 22 of the present invention is surrounded by the outer cylinder 27 through a gap 28, and the gap 28 is connected to the communication port 3.
5, the cold air from the outside flows through the gap 28, thereby cooling the dish body 22 and preventing abnormal heating. In addition, the gap 28
The cooling air flowing through the ventilation pipe 9 flows in from the outside and passes through the ventilation pipe 9.
Since there is no strong wind flowing inside, the dish body 22 is not cooled more than necessary.

The hot air generated by the blue flame of the plate body 22 rises and advances into the hot air mixing cylinder 29, and within the hot air mixing cylinder 29, it merges with the dry air in the ventilation cylinder 9 to become dry hot air.
The hot air mixing cylinder 29 enhances the combustion effect and improves the merging effect with the drying air that is blown out by changing the direction laterally.

This dry hot air is supplied from the hot air supply chamber 4 to the down-flow grain drying chambers 3, 3 to dry the grains.
Because of the blue flame with little soot, the quality of the grain does not deteriorate.

Grain with dry skin is dropped little by little onto the receiving gutter 7 by the rotation of the rotary valves 6, 6, advanced by the screw conveyor 8, fried by the elevator, and stacked in the humidity control tank 1 for circulation. do. Then, as it flows down the humidity control tank 1 over time, the dry skin absorbs the moisture in the moist interior, and when this circulation drying is repeated 5 to 6 times, the drying of the unhulled rice is completed.

During this period (approximately 8 hours), the vaporization burner continues to burn continuously, and the variable motor 34, which has a large load,
However, since the variable motor 34 of the present invention is installed outside the ventilation tube 9,
Heating is prevented.

In addition, since the suction port 31 of the blower tube 12 containing the blower 33 is open on the side of the dry hot air outlet 30 of the ventilation tube 9, smooth combustion is achieved without being influenced by the wind pressure of the air flowing by the fan 11. The air is sucked in and blown onto the inner surface of the heating bowl 18.

(Effects) The conventionally known Japanese Patent Application Laid-Open No. 54-146066 describes a grain drying device provided with a ventilation pipe and an exhaust pipe.

In addition, in the conventionally known Japanese Utility Model Application No. 56-128906 (Utility Application No. 55-25185), a blower tube is provided with a dedicated blower for blowing combustion air inside. forming a vertically oriented air outlet in the section, attaching a plate body and a blowing tube to the upper surface of the blowing hole, inserting a vertical rotation shaft of the motor into the center of the blowing hole, the plate body, the blowing tube and the blower; A heating element is fixed to the upper end of the vertical rotating shaft, a combustion chamber is formed on the outer periphery of the dish body, the outer periphery of the combustion chamber is surrounded by an inner cylinder, and a gasification is performed with a certain gap around the outer periphery of the inner cylinder. It is described that a gasification chamber is formed and the periphery of the gasification chamber is surrounded by an outer cylinder.

In addition, conventionally known Utility Model Application Publication No. 55-46949 (Utility Model Application Publication No. 53-129474) discloses that a vertical blower is installed inside a dedicated blower for blowing combustion air to the outer lower part of a horizontal ventilation tube. A blower tube is provided, a vertically oriented blower port is formed in the upper part of the blower tube, a dish body having a through hole in the center and a blower tube are attached to the upper surface of the blower hole, and the blower tube, the plate body and the blower tube are attached to the top surface of the blower tube. A vertical rotating shaft 17 of the motor is inserted through the center of the vertical rotating shaft, a heating element surrounding the blowing cylinder is fixed to the upper end of the vertical rotating shaft, and the side outer periphery of the dish body is surrounded by an outer cylinder to form a combustion chamber. However, it is described that a hot air mixing cylinder is provided above the outer cylinder.

Among the above-mentioned known examples, JP-A No. 54-146066 does not mention a vaporizing burner, and, like the conventional circulation humidity control type grain drying equipment, the drying rate is 1 to 2 m ³ /sec or more per ton of unhulled rice. Because it takes advantage of such strong winds, there is a problem that when the amount of oil is reduced to make the flame smaller, the wind hitting the flame is too strong and can cause a misfire.

In addition, the device described in Japanese Utility Model Application Publication No. 55-46949 has an inner tube surrounding the dish body and the inverted bowl body to form a combustion chamber within the inner tube, and a combustion chamber between the inner tube and the outer tube. Since the gasification chamber is formed, there is a problem that the inner cylinder and the plate body are abnormally heated.
Since there is no hot air mixing cylinder, when applied to a circulation humidity control type grain dryer, there is also the problem that the wind hitting the flame is too strong, causing misfires.

Also, Utility Model Application Publication No. 128906 (1982)
25185), the outer cylinder surrounding the combustion chamber has an exposed structure, so it is cooled by more air from the ventilation tube than necessary, and the fuel is not gasified sufficiently. Since the tube, the plate body, and the blowing tube are arranged on the same axis, there is also a problem that the entire structure becomes large and becomes resistant to the drying air inside the ventilation tube. Furthermore, since the hot air mixing cylinder is a simple cylinder, there is also the problem that the hot air produced by the flame in the dish and the dry air in the ventilation cylinder are unevenly joined together.

However, in the present invention, a blower tube 12 is provided inside the horizontal blower tube 9 and a dedicated blower 33 for blowing combustion air is provided at the lower outside of the horizontal tube 9, and a vertical blower port 36 is provided in a part of the blower tube 12. A plate body 22 having a through hole in the center and a blow-out cylinder 14 are attached to the upper surface of the air outlet 36, and a vertical rotation shaft 17 of the motor 16 is mounted at the center of the air outlet 36, the plate body 22, and the blow-off tube 14. is inserted into the upper end of the vertical rotation shaft 17, and the blow-off tube 14
An inverted bowl-shaped heating bowl 18 surrounding the dish body 22 is fixed, and the side outer periphery of the dish body 22 is concentrically arranged with an annular gap 28 communicating with the outside so that cooling air is supplied from below. A hot air mixing cylinder 29 is surrounded by a cylinder 27 and has ventilation holes 37 on the circumference at the top of the outer cylinder 27.
, and the cooling air flows into the hot air mixing cylinder 29 through the gap 28. Since this is a vaporizing burner for a grain drying device, the cooling air flows into the hot air mixing cylinder 29 through the gap 28. By providing the hot air mixing cylinder 29 with ventilation holes 37 on the circumferential surface of the hot air mixing cylinder 29, the air is mixed with dry air inside the hot air mixing cylinder 29. Even with the formed shape, hot air can be evenly mixed into dry hot air.

The outer periphery of the plate body 22 is connected to the outer cylinder 27 through the gap 28.
Since the gap 28 communicates with the outside through the communication port 35, cold air from the outside flows into the hot air mixing cylinder 29 through the gap 28, cooling the dish body 22 and preventing abnormalities. Prevent heating.

The cooling air flowing through the gap 28 flows in from the outside and is not a strong wind flowing inside the ventilation tube 9.
The dish body 22 is not cooled more than necessary, and the kerosene on the inner surface of the heating bowl 18 is actively gasified and burns as a blue flame.

This effect is achieved.

[Brief explanation of drawings]

FIG. 1 is a vertical front view of the grain drying apparatus, FIG. 2 is a plan view of the grain dryer, and FIG. 3 is a cross-sectional view of the ventilation tube. Explanation of symbols, 1... Humidity control tank, 2... Funnel, 3... Down-flow grain drying chamber, 4... Hot air supply chamber, 5... Hot air exhaust chamber, 6... Rotary valve, 7...
...Gutter, 8...Screw conveyor, 9...Ventilator, 10...Exhaust pipe, 11...Fan, 12...
Blower tube, 13...Upper side, 14...Blower tube, 15
...opening, 16...motor, 17...vertical rotating shaft, 18...heating bowl, 19...diffuser, 20...
Kerosene supply device, 21... gap, 22... dish body, 2
3... Gasification chamber, 24... Combustion plate, 25... Combustion chamber, 26... Ceramic heater, 27... Outer cylinder, 28... Gap, 29... Hot air mixing cylinder, 30...
...Air outlet, 31...Suction port, 32...Lower wall, 33
...Blower, 34...Variable motor, 35...Communication port, 36...Blower port, 37...Blower hole.

Claims (1)

[Claims] 1 A blower tube 1 equipped with a dedicated blower 33 for blowing combustion air to the outer lower part of the horizontal ventilation tube 9.
2, and a vertical air outlet 3 is provided in a part of the air tube 12.
6, and a plate body 22 with a through hole in the center and a blow-out cylinder 14 are attached to the upper surface of the air outlet 36, and the motor 16 is rotated vertically at the center of the air outlet 36, the plate body 22, and the blow-out cylinder 14. The shaft 17 is inserted through the shaft 17, and an inverted bowl-shaped heating bowl 18 that surrounds the blow-off tube 14 is fixed to the upper end of the vertically rotating shaft 17, so that cooling air is supplied from below to the side outer periphery of the dish body 22. An outer cylinder 27 is arranged concentrically with an annular gap 28 communicating with the outside.
A grain drying system is constructed in which a hot air mixing cylinder 29 having ventilation holes 37 on the circumferential surface is provided in the upper part of the outer cylinder 27, and the cooling air flows into the hot air mixing cylinder 29 through the gap 28. Evaporative burner for equipment.