JPS6251650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to roasting of granular foods such as beans and grains,
The present invention relates to an apparatus for performing heat treatment on granular articles such as drying or drying granular industrial products, and relates to an apparatus that uniformly performs the heat treatment.

Conventionally, for example, in a heat processing apparatus for granular foods, hot air is supplied from below a perforated plate arranged in a processing chamber to suspend the granular materials on the perforated plate and perform roasting processing, etc. However, in conventional devices, the perforated plate is either fixed or vibrated up and down, and hot air is directly supplied to it from below.

However, with the conventional method of supplying hot air directly to the perforated plate, it is not possible to supply hot air uniformly to the entire perforated plate, and the wind pressure differs between the center and side parts of the perforated plate, resulting in poor roasting. This has the drawback of causing unevenness, and when it comes to granules on the perforated plate, simply vibrating the perforated plate up and down creates a difference in fluidity between the lower layer and the upper layer, resulting in insufficient agitation effect. However, there were drawbacks such as uneven roasting between the lower layer and the upper layer.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks,
Heat treatment of granular materials that enables uniform heat treatment without uneven processing by supplying uniform hot air to the entire perforated plate and moving the entire perforated plate in an elliptical motion to add mobility to the fluid stirring of the granular material. The goal is to supply the equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below along with its embodiments based on the drawings.

In the figure, reference numeral 1 indicates the entire heat treatment furnace, which is constructed by filling a heat insulating material 1b between the inner and outer double walls 1a, 1a shown in FIG. Reference numeral 2 indicates a hot air rectification chamber provided at the lower stage of the heat treatment furnace 1, 3 indicates a processing chamber provided at the middle stage, and 4 indicates an exhaust chamber provided at the upper stage. Reference numeral 5 denotes a gas combustion chamber installed on the side of the heat treatment furnace 1, and the combustion gas generated here is sent to the rectification chamber 2 via a supply path 7 by a blower 6. Above the exhaust chamber 4, there is provided a hopper 8 which can be closed by an opening/closing motor 8a after the product is introduced, and an exhaust port 9 which can be adjusted by an adjustment damper 9a. A circulation path 10 leading to the chamber 5 is provided so that the exhaust gas in the exhaust chamber can be circulated to the gas combustion chamber 5, and energy can be saved by heating and reusing the gas. Reference numeral 11 denotes a perforated plate, which is installed in the processing chamber 3, but in the embodiment, it is formed into a box shape with the bottom surface as a perforated plate 11a, and the product outlet 12 side provided on one side of the processing chamber is It's closed. This perforated plate 11 is made to move in an ellipse by being given vertical and longitudinal combined vibrations by a vibrating device 13, which will be described in detail later.
Reference numeral 14 denotes a rectifying mechanism provided in the hot air rectifying chamber 2, which rectifies the hot air supplied from the gas combustion chamber 5 to equalize the distribution of hot air blown from the perforated plate. . This rectification mechanism 1
4 is a rectifying plate 1 provided on the inlet side of the hot air rectifying chamber 2
5, and a rectifying device 16 disposed below the perforated plate 11a, the rectifying device 16 having a plurality of cylindrical bodies 18 uniformly provided on a plate 17, and an adjustment damper 19 provided on the cylindrical body. It is composed of: Therefore, the pressure distribution of the hot air at points A, B, C, and D is made constant by the rectifying plate 15, and the hot air passing area at points A', B', C', and D' is divided equally, so that the hot air is uniformly distributed. The fluid is supplied and finely adjusted by the adjustment damper 19, so that the distribution of the air blown from the perforated holes becomes uniform and an ideal fluidized bed is formed.
The vibration device 13 has the following configuration. An eccentric collar 21 is provided on a drive shaft 20 provided through the processing chamber 3, and this eccentric collar and one end of the perforated plate 11 are connected by a bearing, and rotation of the drive shaft causes the perforated plate to move. One end of the device is designed to vibrate up and down and back and forth. On the other hand, a part of the link 22 is pivotally attached to the other end of the perforated plate, and the other end of the link is pivotally attached to the fixed shaft 23. Therefore, due to the longitudinal vibration of the perforated plate, the other end of the perforated plate makes a circular motion using the pivot portion 23a as a fulcrum, and the entire perforated plate is given a combined vertical and longitudinal movement to perform an elliptical motion. The fixed shaft 23 is suspended from a suspension shaft 24 suspended vertically within the processing furnace.
The other end of the perforated plate is lifted up by an air cylinder 25 provided at the top of the furnace, so that the perforated plate can be tilted when taking out the product. 26 is an opening/closing lid provided at the product outlet 12,
It is opened and closed by an air cylinder 27. 28 is a viewing window provided on the opening/closing lid 12, 29 is a drive motor for the drive shaft 20, 30a, 30b,
30c is the hot air rectification chamber 2, the processing chamber 3, and the exhaust chamber 4.
31 is a gas burner of the gas combustion chamber 5, 32 is a combustion state monitoring window, 33 is an adjustment damper provided in each of the supply path 7 and the circulation path 10, 34 is an adjustment port provided on each side wall of the gas combustion chamber 5; Product outlet 1
This is the shutter for takeout provided at 2.

Next, an example of the operation of the heat treatment apparatus of the present invention will be described. The combustion gas generated in the gas combustion chamber 5 is turned into hot air by the blower 6 via the supply path 7 and is supplied to the hot air rectification chamber 2. The hot air is uniformly supplied into the hot air rectifying chamber by the rectifying plate 15, and is evenly blown up from the perforated holes by the rectifying device 16. Therefore, an ideal fluidized bed is formed over the entire surface of the perforated plate 11, and the granules can be uniformly heat-treated. Furthermore, since the perforated plate itself is moved in an elliptical motion up and down and back and forth by the vibrating device 13, there is no fear that the granules will be agitated and uneven processing will occur between the upper and lower layers. The exhaust inside the exhaust chamber 4 is controlled by the adjustment damper 9a.
is opened and the adjusting damper 33 of the circulation path 10 is opened.
However, depending on the type of granules to be heat-treated, all or part of this hot air can be reused by closing the damper 9a and opening the damper 33. Set circulation route 10
The gas is circulated through the gas combustion chamber 5, reheated, and reused as hot air. By doing so, significant energy savings can be achieved. When taking out the product, the opening/closing lid 26 is opened by the air cylinder 27 and the product is taken out from the take-out shooter 34, but the product slides down by pulling up the suspension shaft 24 with the air cylinder 25 and tilting the perforated plate 11. Even in this case, by applying vibration to the tilted perforated plate with the vibration device 13, the product can be accurately and easily slid down.
It is not necessary to tilt the perforated plate to such an extent that the angle of repose of the product collapses.

According to the apparatus for heat treatment of granular materials of the present invention, the heat treatment furnace has a configuration in which a hot air rectification chamber is formed in the lower stage, a processing chamber is formed in the middle stage, and an exhaust chamber is formed in the upper stage. Since a combustion chamber is provided and the combustion gas generated in the gas combustion chamber is fed by a blower to the rectification chamber via the supply furnace, the entire device can be made into a compact structure.

Further, the rectification mechanism in the rectification chamber is supplied to the perforated plate by a rectifier plate installed on the inlet side of the hot air rectification chamber and a rectifier equipped with a large number of adjustment dampers arranged below the perforated plate. Since the hot air is rectified in two stages, horizontally and upwardly, the distribution of the hot air blown out from the perforated plate can be made uniform, and the object to be treated on the perforated plate can be heat-treated while being stirred. An ideal fluidized bed can be formed for the processed material. Moreover, the perforated plate does not simply swing in the horizontal direction, but performs an elliptical motion by being given a combination of vertical and longitudinal vibrations by a vibrating device, which adds mobility to the fluidized bed and causes it to be exposed to the fluidized bed. The material to be treated can be stirred more effectively, and uniform heat treatment without unevenness can be achieved.

Furthermore, according to the apparatus of the present invention, depending on the type of the object to be heated, hot air can be circulated from the exhaust chamber in the upper part of the processing chamber to the gas combustion chamber via the circulation path to be reheated and reused. This allows less fuel gas to be used to generate combustion gas, resulting in significant energy savings.

[Brief explanation of the drawing]

The drawings show an embodiment of the apparatus for heat treatment of granular materials according to the present invention, and FIG. 1 is a front view of the entire apparatus, FIG. 2 is a left side view of the same, FIG. 3 is a right side view of the same, and FIG. The same plan view as above, FIGS. 5 and 6 are longitudinal sectional views of the heat treatment furnace, FIG. 7 is a plan view of the perforated plate, and FIG. 8 is a longitudinal sectional view of the processing chamber (FIG. ), 9th
The figure is a sectional view taken along the line X-X in Figure 8, and Figure 10 is a cross-sectional view taken on the line X-X in Figure 9.
11 is a sectional view taken along line Y--Y in FIG. 8. 1: Entire heat treatment furnace, 2: Hot air rectification chamber, 3: Processing chamber, 4: Exhaust chamber, 5: Gas combustion chamber, 7: Supply path, 8: Hopper, 9: Exhaust port, 10: Circulation furnace,
11: perforated plate, 12: product outlet, 13: vibration device, 14: rectifier mechanism, 15: rectifier plate, 16: rectifier, 19: adjustment damper, 20: drive shaft, 2
1: Eccentric color.

Claims (1)

[Scope of Claims] 1. Heating in which hot air is supplied from below the perforated plate arranged in the processing chamber to suspend the particulate matter on the perforated plate and perform heat treatment such as roasting and drying. In the processing equipment, a heat treatment furnace is configured by a hot air rectification chamber provided in the lower stage, a processing chamber provided in the middle stage, and an exhaust chamber provided in the upper stage, and a gas combustion chamber is provided on the side of the heat treatment furnace. The rectifying mechanism is installed in the rectifying chamber and is configured to feed the combustion gas generated in the gas combustion chamber to the rectifying chamber via a supply path by a blower, and is installed in the rectifying chamber at the inlet of the rectifying chamber. It consists of a rectifying plate placed on the side and a rectifying device equipped with a large number of adjustment dampers placed below the perforated plate to rectify the flow in two stages: horizontally and upwardly. The perforated plate is configured to perform elliptical motion by being given vertical and longitudinal combined vibrations by a vibration device configured by connecting one end of the perforated plate to an eccentric collar provided on the drive shaft. A granular material heat treatment apparatus characterized by: 2. In a heat treatment device that supplies hot air from below the perforated plate placed in the processing chamber, the particulate matter on the perforated plate is suspended and subjected to heat treatment such as roasting and drying. A heat treatment furnace is composed of a hot air rectification chamber provided, a processing chamber provided in the middle stage, and an exhaust chamber provided in the upper stage.A gas combustion chamber is installed on the side of the heat treatment furnace, and a gas combustion chamber is installed on the side of the heat treatment furnace. The rectifier mechanism is configured to feed the combustion gas generated in the combustion chamber to the rectifier chamber via a supply path by a blower, and is installed in the rectifier chamber. It is composed of a rectifying device equipped with a plate and a large number of adjustment dampers arranged below the perforated plate to rectify the flow in two stages horizontally and upwardly, and the perforated plate is driven. A vibrator constructed by connecting one end of a perforated plate to an eccentric collar provided on the shaft generates vertical and longitudinal combined vibrations to perform an elliptical motion, and the gas is discharged from the exhaust chamber. 1. A heat treatment apparatus for granular materials, characterized in that a circulation path is formed leading to a combustion chamber, and the heated air after treatment can be reused in whole or in part.