JPH1019468A - Gas dehydration dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the drying efficiency of a gas dehydration dryer. SOLUTION: In a gas dehydration dryer where a rotary mount 3, on which a cylinder-shaped basket 2 is loaded, is provided inside a main body 1 of the dryer and a gas burner 5 or a hot air outlet 6 is provided on the bottom of a cover mounted on the upper opening of the main body 1 of the dryer, A cut-off wall 8, which cuts off ventilation, is provided on the upper part of a peripheral frame 7 provided on the rotary mount 3 while a large number of blade plates 10 are provided in rows on the outside periphery of a ventilation area 9, thereby inducing the air in the gasket 2 outwardly by means of the blade plates 10. This construction makes it possible for a hot air to pass through easily the clearance of a work piece built up in conical shape and omit a forced air supply blower of a gas burner in the case when a flexible duct 12 is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas dehydration dryer which performs drying by a gas burner simultaneously with centrifugal dehydration.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional dehydration drier of this type. A rotary table 3 on which a cylindrical basket 2 is placed is provided at the center of a body 1, and the top of the body 1 is covered. Gas burner 5 or hot air outlet 6
After washing an object to be processed in a pretreatment step of plating or the like, dehydration is performed by centrifugal force and drying is performed by hot air. The object to be processed A is put in a cylindrical basket 2 made of a wire mesh or a punched steel sheet, conveyed by a hoist, placed on a turntable 3 after passing through an pickling process and a hot water washing process, In addition to the gas burner 5 and the piping,
Although not shown, instruments such as a burner ignition transformer and a valve are mounted. The dewatered water hits the inner wall surface of the body 1 and flows down, and the exhaust used for drying is discharged to the outside through the exhaust port 11 on the side wall of the body 1.

[0003]

In the conventional example shown in FIG. 3, when the basket 2 is rotated at high speed together with the turntable 3, the object A is deposited in a mortar shape by a centrifugal force as shown in FIG. When the processed material A is small like a nut or a washer, the gap between the processed materials is small, so that it is difficult for the hot air to pass through the lower part of the basket 2 and escape upward, resulting in poor drying efficiency. There was a problem of becoming. Also, in order to reduce the weight of the lid 4 for ease of operation, or to prevent the gas burner 5 and attached devices from being subjected to vibration or impact when the lid 4 is opened and closed, the burner body is attached to the outer wall of the body 1. In this case, there is a problem that a separate blower for forced air supply is required if the bending duct 12 (see FIG. 1) is used to supply the liquid to the center of the lid 4.
An object of the present invention is to solve these problems.

[0004]

As shown in FIG. 1, a gas dehydration drier according to the present invention is provided with a turntable 3 on which a cylindrical basket 2 is placed in a body 1 and provided at an opening on the upper surface of the body 1. In the gas dehydration dryer provided with a gas burner 5 or a hot air outlet 6 on the lower surface of the lid 4 to be attached,
A shielding wall 8 for blocking ventilation is formed on the upper part of the peripheral frame 7 provided at the same time, a ventilation part 9 is formed on the lower part of the peripheral frame 7, and a large number of blades 10 are arranged on the outer periphery of the ventilation part 9. And the blade 1
0 is used to attract the air in the basket 2 to the outside.

[0005]

Normally, the object to be treated A in the basket 2 is deposited in a mortar shape on the periphery of the basket 2 by the combined force of centrifugal force and gravity. Therefore, the passage distance of the hot air is long at the lower part of the sediment, and the pressure loss is large.
When the particle size is fine, the time required for drying tends to be long.
However, according to the present invention, the passage of the hot air is limited to only the ventilation portion 9 below the peripheral frame 7 by the shielding wall 8 of the peripheral frame 7 of the turntable 3, and is arranged in a row on the outer periphery of the ventilation portion 9. Since the air in the basket 2 is drawn outward by the slats 10,
The hot air is forcibly passed through the inside of the processing object A on which the hot air is deposited to accelerate the drying, and the hot air is sucked by the negative pressure in the basket 2 even when the gas burner 5 is installed on the side wall of the body 1. Therefore, a blower for forced air supply is not required.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. A turntable 3 which is rotatably supported at the center of a body 1 so as to be horizontally rotatable is driven by a motor 13 via a transmission mechanism. The rotating base 3 is provided with a peripheral frame 7 for holding the basket 2 to be placed, and a cylindrical shielding wall 8 is provided on the upper part of the peripheral frame 7 and a wire mesh is provided on a lower part thereof. A portion 9 is formed, and on the outer periphery of the ventilation portion 9, a number of blade plates 10 are arranged in parallel in the axial direction. A lid 4 that is opened and closed by a motor is attached to an upper surface opening of the body 1, and a hot air outlet 6 is provided downward at a central lower surface of the lid 4 and attached to an outer wall of the body 1. Hot air supplied from the gas burner 5 through the bending duct 12
The suction force of the blades 10 blows out of the hot air outlet 5 into the basket 2. In the present embodiment, a part 10a of the large number of blades 10 is formed to be thick as a structure for supporting the shielding wall 8,
Of course, all the blades 10 may be used as a structure. As shown in FIG. 2, a vortex duct 14 having a U-shaped cross section is provided around the slats 10, and the air around the slats 10 is forcibly rotated by the ducts 14 to generate centrifugal force. Thus, the suction pressure can be surely formed even at a relatively low rotation speed by sending out from the exhaust port 11.

[0007]

[Embodiment] A rotation speed of 800 rpm and a gas burner of 20,000 kca
1 / h, hot air temperature 120 ° C, basket 750mmφ ×
In a 650 mm gas dehydration dryer, the upper part of the peripheral frame was used as a shielding wall, the lower part was used as a ventilation part, and 48 blades with a width of 5 cm were provided. The discharge air volume at the exhaust port was about 10 m ³ / min. Was. At this time, a washer having a thickness of 100 mm was used as an object to be processed, and a hot air passage distance in the object was about 10 cm.

[0008]

As described above, according to the present invention, the upper portion of the peripheral frame 7 of the turntable 3 holding the basket 2 is formed as the shielding wall 8 and the ventilation portion 9 is formed at the lower portion. The blades 10, which are limited to the lower part of the processing object A deposited in a mortar shape and are arranged in a row on the outer periphery of the ventilation part 9, are strongly in the basket 2 by the same principle as a multi-blade centrifugal fan such as a sirocco fan. Since the air is attracted, there is an advantage that the hot air effectively contributes to the drying of the object to be processed through the gap of the sediment, and the gas burner 5 is provided on the side wall of the body 1 so that the combustion gas is supplied by the bending and stretching duct 12. Also in the case where hot air is supplied, the basket 2
There is an advantage that there is no need to provide a separate blower to be drawn inside.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the structure of the peripheral frame according to the first embodiment;

FIG. 3 is a longitudinal sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 2 Basket 3 Turntable 4 Lid 5 Gas burner 6 Hot air outlet 7 Perimeter frame 8 Shielding wall 9 Ventilation part 10 Blade plate 11 Exhaust port 12 Bending duct 13 Motor 14 Vortex duct A

Claims (2)

[Claims] 1. A gas dehydration / drying machine comprising: a rotary table on which a cylindrical basket is placed; and a gas burner or a hot air outlet on a lower surface of a lid attached to an upper opening of the fuselage. At the top of the peripheral frame provided on the turntable, a shielding wall for blocking ventilation is formed, and at the lower part of the peripheral frame, a ventilation portion is formed, and a large number of blades are arranged in the ventilation portion, and the blades are used. A gas dehydrator that draws air in the basket to the outside. 2. A vortex duct having a U-shaped cross section is provided around the turntable so as to face the ventilation section.
The gas dehydration dryer according to the above.