JPS6242653B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular material processing apparatus, a base plate used in the apparatus, and a method for manufacturing the base plate.

Published patent publication No. 53-69973 related to the same applicant
No. 2006-11-2003 describes an apparatus for processing powdery or granular materials, which comprises a corrugated thin base plate installed substantially horizontally and consisting of mutually parallel peaks and troughs, and a corrugated thin base plate that is located close to the corrugated surface of the thin base plate. small perforations separated from each other, feeding means for supplying powder or granular material to the thin base plate, and vibration means for vibrating the thin base plate;
gas supply means for supplying gas upwardly through each small perforation on the thin base plate in order to flow said substance over the thin base plate, and in a direction perpendicular to the peaks and valleys of said corrugated surface; An apparatus for processing powdery or granular substances is disclosed, which comprises a take-out means for taking out the thus treated substance from the apparatus where the substance is being conveyed in a flowing manner.

In order to flow the substances being processed in such processing equipment, it is important to supply a flow-promoting gas such as gas or air as multiple dense, mutually parallel gas flows. be. This is even more so if the substance is viscous, such as moist powdered milk. As disclosed in the above-mentioned JP-A-Sho, this problem can be solved by forming small-diameter perforations in a thin metal plate and separating them from each other, without using any kind of support on the side edges of the thin metal plate. This problem can be solved by using a corrugated thin base plate obtained by corrugating a thin metal plate so as to exhibit necessary and sufficient strength or firmness.

In addition, in order for the substance to be removed by itself without staying or remaining on the conveyor bed plate even if the supply of the substance to the entire apparatus is stopped or interrupted, the wave shape of the thin base plate is It has been proposed to have a corrugated shape with an acute angle to the direction of material transport and to provide one or more grooves along at least one side edge of the thin base plate. However, providing grooves perpendicular to the corrugations on the thin base plate not only increases the manufacturing cost of the thin base plate, but also has drawbacks such as a loss of strength of the corrugated thin base plate. discovered.

Therefore, the present invention provides for the above-mentioned material even if the corrugations on the thin base plate are perpendicular to the material conveying direction and the side edges are not provided with grooves extending in the longitudinal direction. This is intended to provide a powder or granular material processing device that has an automatic removal function.

The device according to the invention is characterized in that at least a large portion of the holes formed in the corrugated thin base plate are such that at least a large part of the holes formed in the corrugated thin base plate create a horizontal diversion in the gas flow supplied through the holes that flows approximately horizontally towards the material removal means. It is characterized by being formed.

It should be noted that holes are formed in the flat, rather than corrugated, plate, protruding like the teeth of a gill flap or a radish remover, and opening perpendicularly or almost perpendicularly to the plane of the plate (hereinafter such holes are referred to as ``lip-shaped holes''). (referred to as "holes") so that the gas flow supplied from one side flows out in a direction parallel to the baseplate or at an acute angle to it as it passes through such lipped holes. Already known. However, in the case of a base plate having holes whose shape is determined so that the gas flow blows out in an oblique direction, when the particulate material is being flowed and conveyed toward the outlet,
Due to the gas flow blowing in an oblique direction, "return mixing" of the particulate matter (the particulate material forms a layer and is not transported in one direction on average, but some part of the particulate material is transported later) The phenomenon of mixing with particulate matter) occurs, which is undesirable. However, it has been found that this undesirable phenomenon can be reduced or eliminated by making the base plate corrugated and the holes on the base plate having a lip, and based on these findings, The present invention is based on this. Furthermore, by configuring the base plate as described above, it is possible to solve the problems associated with the apparatus disclosed in the above-mentioned Japanese Patent Application Publication No. 2003-11010 regarding the automatic removal of particulate matter.

Each lipped hole can be formed by carving a flat plate, and by collapsing the portion of the flat plate that is close to the carving and rearward toward the particulate material removal means, the opening of the lipped hole is opened. Form. In plates of small thickness, the opening area of such lipped holes may be smaller than the opening area of normal perforations, in which case the number of closely spaced holes provided in the base plate may be reduced accordingly. It is possible to increase the flow rate of the gas stream to be supplied without increasing it. The greater the number of holes with lips, the more smoothly even sticky granular materials can be made to flow.

The present invention is a corrugated thin base plate having small perforations uniformly arranged and isolated from each other on the surface and consisting of mutually parallel peaks and valleys, which is suitable for transporting particulate material by vibration. It also relates to a corrugated thin bed plate for supporting a fluidized bed.

According to the present invention, the small perforations on the corrugated thin baseplate are formed by notches in the metal sheet, and the part of the baseplate on one side adjacent to the notches is caved in, and all of the above-mentioned The grooves are parallel and non-orthogonal to the extending direction of the peaks and valleys, and the depressions are disposed on the same side of the grooves.

Furthermore, the invention also relates to a method for manufacturing the above-mentioned corrugated thin base plate.

The method according to the invention involves forming perforations by drilling mutually isolated locations in a metal sheet, and then corrugating the metal sheet.
It is characterized by forming a corrugated thin base plate having parallel peaks and valleys.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 3, the granular material processing apparatus is composed of a support frame 41 and a housing 11 mounted on the support frame 41 via elastic support means 16 such as a spring. There is. Housing 11
is covered with a see-through cover 42. The respective ends of the housing 11, at which the inlet 25 and outlet 26 of the granular material are located, have different heights. As shown in FIG. 2, the inlet 25, which can also be connected to the hopper 43, is connected to the powder material P to be dried in the apparatus.
However, it is preferable that the porous corrugated bed plate 12 be vertically dropped onto the porous corrugated bed plate 12 connected to the inner wall of the housing 11 in a substantially horizontal state. In this way, entrance 25
If the granular material to be dried is viscous, placing the granular material on a layer of the granular material that is already partially dried and flowing without directly contacting the base plate 12 is advantageous. This is important to make it fall. The lower high pressure chamber 14 formed below the base plate 12 is divided into a plurality of chambers 14a by a partition wall 29.
and 14b, and these chambers 1
Flow promoting pressurized gas is supplied to 4a and 14b through gas supply ports 30 and 44. Inside these lower high pressure chambers 14a and 14b, the pressurized flow promoting gas is Preferably, the gas flows into the chambers 14a and 14b in a generally horizontal direction through gas inlets 30 and 44. The gases or air supplied through the gas supply ports 30 and 44 may be different from each other and may be at different temperatures. However, if desired, the partition wall 29 may not be provided, and in this case, gas or air will be supplied to the lower high pressure chamber 14 through one gas supply port.

As shown in FIG. 1, the housing 11 includes a water conduit circuit 45 for supplying pressurized water to a spray device (not shown) disposed within the housing 11.
It is also possible to provide a clean water washing device consisting of:

The longitudinal side edges of the corrugated bedplate 12 are connected to corresponding side walls of the housing 11 via angle members 46 and 47. Corrugated flange portions 48 and 49 are formed on the angle members 46 and 47, respectively, and
These corrugated flange parts 48 and 49 are connected to the corrugated bed plate 1.
2 to each other in a state where they are sandwiched, preferably by welding 51.
are connected by. Each longitudinal side edge of the baseplate 12 is connected by a welded seam 51 to a corresponding free edge of the horizontally corrugated flange portion 48 of the angle member 46 . As shown in FIG. 3, the width of the horizontal corrugated flange portion 49 is preferably smaller than the width of the horizontal corrugated flange portion 48 in order to create a space laterally between the weld seams 50 and 51. desirable. By connecting the base plate 12 to the housing 11 in this manner, it is possible to prevent the formation of sharp corners or deep pockets that would impede automatic removal of particulate matter.

The base plate 12 is formed with closely spaced so-called lip holes 55, as disclosed, for example, in U.S. Pat. Nos. 3,821,342 and 4,033,555. Each lipped hole can be formed by notching a metal sheet serving as the base plate 12 and forming a depression on one side adjacent to the notch. The corrugated tabletop 12 has a plurality of peaks 52 and valleys 53 (third
It is desirable that these holes 55 are closely spaced from each other so that they are uniformly formed on the base plate 12 at each peak 52 and each trough 53. This means that the gas flow blown out from the lower high pressure chamber 14 through the holes 55 flows at a variable angle with respect to the horizontal plane, and that the gas flow coming out of each hole 55 is This means that a large or small horizontal flow component of the gas occurs in the longitudinal direction of the base plate 12 and towards the outlet 26, as shown in FIG.

During operation of the apparatus shown in FIGS. 1 to 3, particulate material P is supplied from the hopper 43 through the inlet 25 to one end of the base plate 12. The flow promoting hot air or gas is supplied to the lower high pressure chambers 14a and 14b via the air guide pipes 30 and 44, and then
While blowing upward as a narrow jet stream through the lipped hole 55, the entire housing 11 is vibrated via a conventional vibration generator 15 driven by a motor 59. The gas supplied in this way and blown above the base plate 12 is discharged as exhaust gas through the exhaust pipe 21 communicating with the upper part of the housing 11. Dried granular material is removed via outlet 26.

The above device can be divided into a heating section and a cooling section. In this case, hot air or gas is supplied to the supply port 30.
The cold air or gas may be supplied to the lower high pressure chamber 14b via the supply pipe 44, and the cold air or gas may be supplied to the lower high pressure chamber 14b via the supply pipe 44. Furthermore, a further adjusting damper 56 can also be provided above the partition 29. If this damper 56 is used, it should be set in a vertical position when starting the apparatus and placed in a position above the lower high pressure chamber 14b before the wet powder material just supplied to the base plate 12 is sufficiently dried. to prevent premature movement to the cooling section. When the granular material is sufficiently dried in the heating chamber above the lower high pressure chamber 14a, the damper 56 is gradually adjusted to the open position as shown in FIG. The thickness of the fluidized bed of particulate material on the base plate 12 is determined over time by the controlled position of the adjustable damper 40.

When stopping or interrupting the operation of the device, stop supplying the granular material P to the hopper 43, and
The damper 40 is adjusted to the open position while continuing to supply the flow promoting gas and vibrating the entire housing 11. Then, the dried particulate matter is taken out from the upper space 13 of the housing 11, and since the gas flow blown out from the lip hole 55 of the base plate 12 has a horizontal flow component toward the outlet 26, the remaining powder is removed. The particulate matter is blown out from the troughs 53 of the base plate 12 and automatically removed. After substantially all of the dry granular material has been removed from the device, pressurized water or other cleaning liquid may be supplied via conduit 45 to a spray device located within housing 11. , the base plate 12 is cleaned.
During this cleaning work, in order to perform the cleaning work efficiently and also to blow out the droplets remaining in the troughs 53 of the corrugated bed plate 12 when the supply of cleaning liquid is stopped, a flow promoting gas is supplied. It is preferable to let it continue. The bottom 57 of the lower high pressure chamber 14 is preferably sloped so that the cleaning liquid collects in the lower part of the bottom 57 relative to the floor and flows outwardly through the drain 58.

The baseplate 12 is drilled in a conventional manner by providing a plurality of parallel notches and forming a recess 65 on one side of each notch, as shown in FIGS. 5 and 6. It may also be made of a metal sheet in which a hole 55 with a lip is formed.

FIG. 7 shows a method of forming a corrugated bedplate 12 in which a metal sheet wound as a coil 60 having lip holes 55 as shown in FIGS. 4 through 6 is separated from each other. The corrugated bed plate 12 can be formed by supplying the material to a corrugating forming machine comprising an upper machine stand 61 having a cylinder 63 separated from each other and a lower machine stand 62 having cylinders 64 separated from each other. At this time, it is desirable that the metal sheet to be corrugated is fed to the corrugation forming machine so that the notches on the metal sheet are approximately parallel to the longitudinal axis or rotational axis of each cylinder 63, 64. The upper machine stand 61 is supported so as to be movable relative to the lower machine stand 62, and when the upper machine stand 61 is raised, the cylinder 6
3 separates from the metal sheet, but as it descends as shown in FIG. 7, the cylinder 63 engages with the metal sheet and cooperates with the cylinder 64 of the lower machine base 62 to corrugate and form the metal sheet. Therefore,
While the metal sheet is intermittently supplied from the coil 60 in predetermined lengths, the intermittent supply of the metal sheet is formed by alternately lowering the upper machine base 61 in the direction of the arrow intermittently to form the metal sheet formed by the cylinders 63 and 64. This results in a corrugated tabletop having ridges and troughs. The pressure that must be applied to the metal sheet during corrugation forming in this way is such that the lip part (overhanging part like an umbrella) of the lip hole 55 formed in the metal sheet becomes flattened or deformed. It is selected to the extent that it does not occur. After forming the corrugated bed plate 12 in this manner, the upper surface of the bed plate 12, which is the raised surface where the depressed portion 65 is formed, is polished by, for example, electrolytic polishing or sandblasting using spherical glass particles. Finish by polishing using the Teing method. The sandblasting method has the advantage that it can be polished after the corrugated tabletop 12 is installed in the housing 11.

When putting the device according to the present invention into practical use, it is desirable to configure it as follows.

As the corrugated base plate 12, a stainless steel sheet plate with lip holes 55 bored therein as described above and as shown in FIG. 3 is used. At this time, the spacing S between adjacent rows of lipped holes 55 is approximately 4 mm, and the lipped holes 55 in adjacent rows are offset from each other. The spacing d between the lipped holes 55 in each row is about 5 mm, each lipped hole 55 has a length l of about 1.6 mm, and is provided with a notch extending in a direction perpendicular to each row. to form by The depressed portion 65 on one side of each notch formed at this time has a maximum depth h of approximately 0.16 to 0.2 mm at the location of the corresponding notch. By processing and forming the base plate in which the lipped hole 55 is formed into a corrugated shape having peaks 52 and troughs 53 substantially parallel to the notches as shown in FIG. 7, a corrugated base plate is obtained. Finish.

The pitch L (distance between adjacent peaks or troughs) of the corrugated platen is approximately 140 mm, and the amplitude is a.
(The vertical distance from the top of the peak to the bottom of the adjacent valley) is approximately 28 mm.

When the corrugated bedplate 12 finished with the dimensions described above is used in a device corresponding to that shown in FIGS. 1 to 3 for drying powdered milk that has been partially dried in a conventional spray drying process. , housing 11
vibrates at a frequency of 500 to 800 cycles per minute.
This period of oscillation varies depending on the fat content of the powdered milk. A low negative pressure of about 2 to 5 mm water column is maintained in the upper space 13 of the housing 11, while a pressure of about 120 mm water column relative to atmospheric pressure is maintained in the high pressure chamber 14 below the base plate 12. maintain. However, these pressure values may be appropriately selected depending on the type of granular material to be dried.

Although the peaks and valleys of the corrugated bedplate used in the device according to the present invention have been described as extending parallel to the longitudinal direction of the bedplate 12, they are similar to those shown in FIGS. As shown in the figures, it may be formed to have an angled or arrow-shaped pattern. In addition, each hole with a lip 55 is provided so that the gas flow passing through the base plate 12 can be
Any shape may be used as long as it provides a flow component that causes the particulate material to flow and move toward the outlet, ie, outlet 26, of the device.

[Brief explanation of the drawing]

1 is a partially cutaway perspective view of a device according to the invention, FIG. 2 is a side sectional view of FIG. 1, and FIG.
The figure is a partially enlarged perspective view of the corrugated bed plate used in the apparatus of Fig. 1, Fig. 4 is a partially enlarged perspective view of the metal sheet before corrugation processing, and Fig. 5 is a line 5-5 in Fig. 4.
6 is a cross-sectional view taken along line 6- in FIG.
6 is a cross-sectional view along line 6, and FIG. 7 is a schematic view of a forming machine for corrugating the metal sheet of FIG. 4. 11...Housing, 12...Corrugated baseplate, 14
...lower high pressure chamber, 25...inlet, 26...outlet,
30, 44... Gas supply port, 43... Hopper,
40, 56... damper, 46, 47... angle member, 48, 49... corrugated flange portion, 52...
... Peak portion of bed plate 12, 53... Valley portion of bed plate 12, 5
5... Hole with lip, 65... Fallen part of hole 55.

Claims (1)

[Scope of Claims] 1. A corrugated thin base plate which is installed substantially horizontally and has mutually parallel peaks and valleys, and small corrugated base plates that are uniformly distributed on the corrugated surface of the thin base plate and are isolated from each other. perforation, supply means for supplying powdered or granular material to the thin base plate, vibrating means for vibrating the thin base plate, and for causing said substance to flow over said thin base plate;
a gas supply means for supplying gas upward through each small perforation on the thin base plate, and a place where the substance is conveyed while flowing in a direction perpendicular to the peaks and troughs of the waveform; and removal means for removing the substance treated in this way from the device,
At least a major part of the small perforations formed in the corrugated thin base plate is formed in such a way that the gas flow supplied through the perforations has a horizontal branch flow that flows substantially horizontally toward the material removal means. A granular material processing device characterized by: 2. In the apparatus for processing particulate matter as set forth in claim 1, the main part of each hole is provided with a cut passing through the base plate, and is located on the side opposite to the side where the ejection means is provided. A device for processing particulate matter, characterized in that a depressed portion is provided by pressing the top of the base plate near the cut. 3. In the apparatus for processing particulate matter according to claim 1 or 2, the gas supply means comprises:
It consists of an air chamber having the base plate as a ceiling plate, and a gas supply port connected to the air chamber to supply compressed gas to the air chamber, the gas supply port being substantially horizontal across the horizontal branch. A device for processing particulate matter characterized by supplying gas to a plenum chamber in the same direction. 4. In the granular material processing apparatus according to claim 3, a housing is provided which accommodates the base plate and forms a flow chamber above the plate and a plenum chamber below. , the corrugations of the base plate extend between opposite longitudinal sides of the plate, each of the longitudinal sides of the plate being secured to a corrugated flange correspondingly extending from the inner wall of the housing. A particulate material processing device characterized by: 5. In the granular material processing apparatus according to claim 4, the wavy flange is a flange of a first angle member fixed to the inner wall of the housing, while the second wavy flange is a flange of a first angle member fixed to the inner wall of the housing. A granular material processing apparatus characterized in that the second wavy flange and the wavy flange are engaged with each other by fixing a second angle member having the wavy shape to the inner wall. 6. A corrugated thin base plate which is installed substantially horizontally and consists of mutually parallel peaks and troughs, small perforations uniformly distributed on the corrugated surface of the thin base plate and separated from each other, and a thin base plate. a supply means for supplying a powdered or granular substance to the substrate; a vibration means for vibrating the thin base plate; and a vibration means for causing the substance to flow on the thin base plate;
a gas supply means for supplying gas upward through each small perforation on the thin base plate, and a place where the substance is conveyed while flowing in a direction perpendicular to the peaks and troughs of the waveform; and removal means for removing the substance treated in this way from the device,
At least a major portion of the small perforations formed in the corrugated thin bed plate are formed such that at least a major part of the small perforations formed in the thin corrugated bed plate are formed in such a way that a horizontal branch flow is created in the gas flow supplied through the perforations that flows substantially horizontally toward the material removal means. A base plate used in a granular material processing device, wherein the base plate is composed of a corrugated thin metal sheet having mutually parallel peaks and valleys; The surface of the plate is provided with a number of small perforations spaced from each other and arranged approximately uniformly, the main part of the lipped hole forming a cut through the metal sheet and extending adjacent to one side of the cut. Press down to create a depressed part,
The cuts are parallel to each other and non-perpendicular to the extending direction of the peaks and valleys, and
A base plate for use in a particulate material processing apparatus, characterized in that the depressed portion is disposed on the same side as the cut. 7 In the base plate described in claim 6,
A bed plate characterized in that the cut extends parallel to the ridges and the troughs. 8. A thin corrugated base plate which is installed substantially horizontally and is composed of mutually parallel peaks and troughs, small perforations uniformly distributed on the corrugated surface of the thin base plate and separated from each other, and a thin base plate. a supply means for supplying a powdered or granular substance to the substrate; a vibration means for vibrating the thin base plate; and a vibration means for causing the substance to flow on the thin base plate;
a gas supply means for supplying gas upward through each small perforation on the thin base plate, and a place where the substance is conveyed while flowing in a direction perpendicular to the peaks and troughs of the waveform, and removal means for removing the substance treated in this way from the device,
At least a major portion of the small perforations formed in the corrugated thin bed plate are formed such that at least a major part of the small perforations formed in the thin corrugated bed plate are formed in such a way that a horizontal branch flow is created in the gas flow supplied through the perforations that flows substantially horizontally toward the material removal means. A method for producing a base plate for use in a granular material processing device, the base plate comprising:
It is composed of a corrugated metal sheet consisting of parallel peaks and valleys, and the surface of the corrugated thin base plate, which consists of peaks and valleys, has a large number of small perforations arranged almost uniformly and isolated from each other. The main part of the lipped hole is formed by forming a cut through the metal sheet, and then pressing near one side of the cut to form a depressed part, and the cuts are formed parallel to each other. A table for use in a particulate material processing device, which is formed non-perpendicularly to the extending direction of the peaks and valleys, and the depressed portions are arranged on the same side of the cuts. A method for manufacturing a plate, characterized in that a corrugated base plate is formed by corrugating the metal sheet.