JP4739731B2 - Cylindrical dryer - Google Patents

Description

  The present invention relates to a cylindrical drying apparatus, and more particularly, to a cylindrical drying apparatus that dries raw oak-like wet raw material having adhesive strength with hot air.

Raw okara is suitable for fertilizers and feeds because it contains abundant plant proteins and plant fibers. However, raw okara has a high water content and is susceptible to spoilage, so it needs to be dried quickly.
As a cylindrical drying device for industrially drying such raw okara, for example, Patent Literature 1 shown below proposes a cylindrical drying device shown in FIG.
FIG. 4 is a schematic view of a cylindrical drying apparatus proposed in Patent Document 1. In the cylindrical drying apparatus shown in FIG. 4, the raw okara 102 stored in the hopper 100 is supplied to one end portion of the cylindrical main body 108 by the screw conveyor 106 while being agitated by the agitator 104 provided in the hopper 100. To do. Hot air from the hot stove 110 is supplied from one hot air inlet 112 to one end of the cylindrical main body 108 to bring the hot air into contact with the raw chicken 102.
While the hot air and the raw okara 102 are in contact with each other, the hot air and the raw okara 102 are sent toward the other end of the cylindrical main body 108, and the raw okara 102 is dried to become a dried okara. The dried okara is taken out along with hot air from an outlet 120 provided at the other end of the cylindrical main body 108, and separated from the hot air by a cyclone 124 via a pipe 122.

4. A plurality of rods 116, 116,... Having one end fixed thereto are arranged radially on the rotating shaft 114 provided in the cylindrical main body 108 shown in FIG. A plurality of paddle screws 120, 120... With blades 118 attached to their respective tips are provided at predetermined intervals along the rotary shaft 114.
Further, in order to make the residence time from the inside of the cylindrical main body 108 as long as possible, each blade 118 provided on the paddle screw 120, 120... Has a force to push the hot air in the advance direction. The feed blade 118a that acts, the parallel blade 118b provided in parallel to the rotary shaft 114, and the return blade 118c that acts to push back the hot air in the direction opposite to the advancing direction are set. Specifically, feed blades 118a and parallel blades 118b are alternately provided in the vicinity of one end portion of the cylindrical main body portion 108, and return blades 118c and parallel blades 118b are provided in the middle portion of the cylindrical main body portion 108. Are provided alternately. Further, in the vicinity of the other end portion of the cylindrical main body portion 108, the front portion and the rear portion are different. The front part consists of a feed blade 118a and a parallel blade 118b, and the rear part consists entirely of a return blade 118c.
JP 2002-350057 A (FIG. 2)

In the cylindrical drying apparatus shown in FIG. 4, the residence time of “okara” in the cylindrical main body 108 can be made as long as possible. Therefore, the cylindrical main body 108 can be reduced in size, and the entire cylindrical drying apparatus can also be used. Can be downsized.
However, according to the study of the present inventor, since raw okara has adhesiveness, the cylindrical drying apparatus shown in FIG. 4 has an inner portion in the vicinity of one end of the cylindrical main body 108 to which the raw okara 102 is supplied. A layer made of raw okara is formed on the wall surface. When this layer becomes thick and contacts the blade 118 of the paddle screw 120, a very large force acts on the paddle screw 120, and the paddle screw 120 may be damaged. For example, even if the paddle screw 120 is reinforced and not damaged, the paddle screw 120 is weighted by the reinforcement and the raw layer is scraped over the entire edge of the cylindrical main body 108 of the blade 118. The force required for the rotation of the rotating shaft 114 becomes extremely large, and the driving means such as a driving motor for driving the rotating shaft 114 increases in size.
Accordingly, an object of the present invention is to provide a cylindrical drying apparatus that can quickly dry hot kara-like wet raw material having adhesive strength without being damaged even if the weight of a member such as a blade member is reduced. is there.

As a result of studying to solve the above problems, the present inventor is supplied when rotating each of the plurality of blade members extending from the vicinity of the raw material supply port of the wet raw material of the cylindrical main body to the other end. Inclined with respect to the rotating shaft so that a feed force toward the other end of the cylindrical member can be applied to the wet raw material, and the vicinity of each raw material supply port of the blade member is formed in a saw-like uneven portion It has been found that the rotational power of the blade member can be reduced by forming it in the saw-shaped portion, and the present invention has been achieved.
That is, the present invention is a method in which a raw raw okara-like wet raw material having an adhesive force supplied to one end of a cylindrical main body is brought into contact with hot air supplied from a hot air furnace to the one end. In the cylindrical drying device that feeds the wet raw material in the direction of the other end of the tube and dries the wet raw material with hot air, a rotating shaft that is provided on the cylindrical main body and is rotated by a driving means, and is fixed to the rotating shaft at an interval. A plurality of supporting members, and the other end portion from the vicinity of the raw material supply port of the wet raw material provided at one end portion of the cylindrical main body portion supported by the supporting member in the vicinity of the inner wall surface of the cylindrical main body portion. And a plurality of blade members provided at equal intervals in the circumferential direction of the cylindrical main body portion, and with the rotation of the rotary shaft. When the plurality of blade members rotate So that at least the vicinity of each raw material supply port of the blade member is inclined with respect to the rotating shaft so that a feed force in the direction of the dry product outlet can be applied to the wet raw material supplied from the raw material supply port; and Each raw material supply port vicinity of the blade member is a saw-like portion in which an end surface on the inner wall surface of the cylindrical main body portion is formed into a saw-like uneven portion, and each convex portion of each saw-like portion of the blade member Is formed so as to correspond to the concave portions of the saw-shaped portions formed on the adjacent blade members so that the rotational locus does not overlap with the rotational locus of the convex portions of the saw-shaped portions formed on the adjacent blade members. The cylindrical drying apparatus is characterized in that a layer made of a wet raw material formed on the inner wall surface of the cylindrical main body portion is scraped off by a saw-like portion on the end surface on the inner wall surface of each blade member .

In the present invention, the dry product can be easily taken out by providing the blade member positioned in the vicinity of the dry product outlet in parallel with the rotary shaft. .
Further, as the support member, a support member composed of a plurality of extension members radially extending from the rotary shaft and ring-shaped members fixed to the respective distal end portions of the extension members is used. The blade member can be firmly supported by fixing the blade member to the ring-shaped member corresponding to the protruding member.
Furthermore, by providing the blade member inclined from the end of the cylindrical main body on the side of the raw material supply port to an intermediate portion between the vicinity of the raw material supply port and the vicinity of the dry product outlet, The wet raw material can be sent in the direction of the other end of the cylindrical main body while sufficiently contacting the hot air.

The wet raw material having stickiness, which is the drying target of the cylindrical drying apparatus according to the present invention, is supplied from one end of the cylindrical main body to one end of the cylindrical main body. It is difficult to send only the hot air in the direction of the other end of the cylindrical main body, and it tends to stay excessively in the same part. Furthermore, the wet raw material is difficult to disperse due to its adhesiveness, and it is difficult to sufficiently bring the wet raw material into contact with hot air.
In this regard, in the present invention, when a plurality of blade members rotate, so that a feed force in the direction of the other end of the cylindrical member can be applied to the wet raw material supplied to the one end of the cylindrical main body, At least the vicinity of each raw material supply port of the blade member is inclined with respect to the rotating shaft. For this reason, the wet raw material in the form of sticky raw okara falls downward while being scraped upward by the blade member, and in this case, it comes into sufficient contact with hot air and the cylindrical main body portion. It is possible to prevent the wet raw material from remaining excessively in the same portion.
Further, when the wet raw material is pushed up against the inner wall surface of the cylindrical main body by the blade member, the wet raw material adheres in layers to the inner wall surface of the cylindrical main body. The scraping of this layer by the entire inner wall surface side of the cylindrical main body portion of the blade member requires an extremely large force and also requires reinforcement of the blade member.
In this regard, in the present invention, the vicinity of each raw material supply port of the blade member is formed into a saw-like portion in which the inner wall side end surface of the cylindrical main body portion is a saw-like uneven portion, and each saw-like portion of this blade member Wetting formed on the inner wall surface of the cylindrical main body portion by forming each convex portion so that the rotation trajectory does not overlap with the rotation trajectory of each convex portion of the serrated portion formed on the adjacent blade member The scraping power of the layer made of the raw material can be reduced.
Therefore, according to the cylindrical drying apparatus according to the present invention, even if the constituent members are reduced in weight and simplified, the raw raw wet raw material having adhesiveness can be quickly dried.

An example of the cylindrical drying apparatus according to the present invention is shown in FIG. The cylindrical drying apparatus shown in FIG. 1 supplies hot air heated by a burner 13 provided at one end of a cylindrical hot air furnace 12 to one end of a cylindrical main body 10 and is stored in a hopper 14. The wet raw material is supplied by a screw conveyor 16. The wet raw material supplied to the cylindrical main body 10 is dried by hot air and taken out from the other end of the cylindrical main body 10 together with the hot air as a dry product.
Thus, by moving the wet raw material and the hot air in the parallel flow direction, it is possible to easily prevent the dried product from being burnt by controlling the hot air temperature in the vicinity of the other end of the cylindrical main body portion 10. That is, the moisture in the wet raw material evaporates in the vicinity of one end of the cylindrical main body 10, and therefore the temperature of the wet raw material is not less than 100 ° C., which is the boiling point of water, even if it comes into contact with hot air due to the latent heat of water evaporation. It is difficult to raise the temperature. On the other hand, in the vicinity of the other end portion of the cylindrical main body portion 10 where the dry state has progressed, the hot air temperature is lower than the hot air temperature on one end portion side of the cylindrical main body portion 10. For this reason, by controlling the hot air temperature in the vicinity of the other end of the cylindrical main body 10 to a temperature at which the dried product does not burn, the dried product can be prevented from burning.
The dried product and hot air taken out from the other end of the cylindrical main body 10 are separated by a cyclone 18, and the dried product is separated by a product blower 22 via a rotary valve 20 provided at the bottom of the cyclone 18. 24 is stored. On the other hand, from the upper part of the cyclone 18, the separated hot air is discharged into the atmosphere by the exhaust fan 26.

As shown in FIG. 2, the cylindrical main body 10 shown in FIG. 1 is supplied with wet raw material stored in the hot air supply port 28 and the hopper 14 to which hot air from the hot air furnace 12 is supplied. The other end is provided with a dry product outlet 32 through which the dry product is taken out with hot air.
The cylindrical main body 10 is provided with a rotating shaft 34 that is rotated along a central axis thereof by a drive motor 29 (FIG. 1) as drive means.
The rotary shaft 34 is provided with a plurality of support members 36, 36,... Fixed at predetermined intervals. As shown in FIG. 3, the support member 36 is fixed to a plurality of extending members 38, 38,... Radially extending from the rotary shaft 34, and to the distal ends of the extending members 38, 38,. It is comprised from the ring-shaped member 40 made.

A plurality of blade members 42, 42,... Are supported by these support members 36, 36,. Each of the blade members 42, 42,... Extends from the vicinity of the raw material supply port 30 to the vicinity of the dry product outlet 32 and, as shown in FIGS. It is provided at equal intervals in the circumferential direction.
As shown in FIG. 3, each of the blade members 42, 42... Is fixed to the ring member 40 corresponding to each of the extending members 38, 38. 42 .. can be firmly supported.
Each of the blade members 42, 42,..., As shown in FIG. 2, has a portion extending from the front end A to the intermediate portion B in the vicinity of the raw material supply port 30 to drive the drive motor 29 (FIG. 1) When the rotary shaft 34 is rotated in the direction of the arrow X, the rotary shaft 34 is provided so as to be inclined with respect to the rotary shaft 34 so that a feed force in the direction of the dry product outlet 32 can be applied to the wet raw material supplied from the raw material supply port 30. It has been.

Even when the wet raw material in the form of sticky raw okara is normally supplied from the raw material supply port 30 to one end of the cylindrical main body, only the hot air supplied from the hot air supply port 28 is used for the dry product outlet 32. It is difficult to send in the direction, and it tends to stay excessively in the same part. Furthermore, since the wet raw material is difficult to disperse due to its stickiness, it is difficult to sufficiently bring the wet raw material into contact with hot air.
In this respect, in the cylindrical main body 10 shown in FIG. 2, the wet raw material supplied from the raw material supply port 30 falls down while being swung up above the cylindrical main body 10 by the blade members 42, 42. In that case, it can be sent in the direction of the dry product outlet 32 in sufficient contact with hot air. For this reason, it is possible to prevent the wet raw material from staying excessively in the same portion, and to reduce the load of the drive motor 29 that drives the rotary shaft 34.

The inclination angle θ of the blade members 42, 42... With respect to the rotating shaft 34 is preferably about 5 to 25 °. When the blade members 42, 42,... Are less than 5 °, the feed force of the wet raw material tends to be insufficient, and when the blade members 42, 42,. The feed force increases, and the residence time of the wet raw material in the cylindrical main body 10 tends to be shortened.
In FIG. 2, the portion from the tip A to the intermediate B near the raw material supply port 30 of the blade members 42, 42... When the amount of hot air is less than the amount of hot air supplied, only the tip portion A of the blade members 42, 42,...
Further, in the blade members 42, 42... Shown in FIG. 2, a portion located at the rear end C in the vicinity of the dry product outlet 32 is provided in parallel to the rotary shaft 34. In this rear end portion C, the wet raw material is a sufficiently dried product, and the dry product scraped up by the blade members 42, 42,... Is easily accompanied by hot air from the dry product outlet 32. It can be taken out. For this reason, in the part of the rear end part C of the blade members 42, 42,..., It is not necessary to forcibly send the dried product in the direction of the dried product take-out port 32, and has a function of scooping up the dried product. It is enough.

Further, each portion of the tip A of the blade members 42, 42,... Shown in FIG. 2 is formed in a saw-like portion 44 in which the end surface on the inner wall surface side of the cylindrical main body portion 10 is formed into a saw-like uneven portion. Yes. Each convex portion forming the sawtooth portion 44 of the blade member 42 has a rotation locus that does not overlap with the rotation locus of the convex portions of the sawtooth portions 44 and 44 formed on the adjacent blade members 42 and 42. Is formed. That is, each convex part forming the sawtooth part 44 of the blade member 42 is formed so as to correspond to each concave part of the sawtooth parts 44, 44 formed on the adjacent blade members 42, 42.
By the way, when the wet raw material supplied to the cylindrical main body 10 is pushed up against the inner wall surface of the cylindrical main body 10 by the blade members 42, 42... Adheres to the inner wall surface in layers. Scraping this layer by the entire front end surface of the blade members 42, 42,... Requires a very large force.
In this regard, according to the blade members 42, 42,... Shown in FIG. 2, the convex portions forming the saw-shaped portion 44 of the blade member 42 are formed on the saw-shaped portions 44, 42 formed on the adjacent blade members 42, 42. 44 is formed so as to correspond to each of the recesses 44, so that the layer made of the wet raw material formed on the inner wall surface of the cylindrical main body 10 is scraped by the entire tip surface of the blade members 42, 42,. Thus, the scraping power of the layer made of the wet raw material can be reduced.
In the intermediate part B and the rear end part C of the blade members 42, 42,..., The wet raw material is substantially dried and loses adhesive force, and therefore adheres to the inner wall surface of the cylindrical main body part 10. There is no need to form the serrated portion 44.

The wet raw material supplied from the raw material supply port 30 of the cylindrical main body portion 10 shown in FIG. 2 falls down while being scraped up above the cylindrical main body portion 10 by the blade members 42, 42,. The hot air supplied from the hot air supply port 28 is sufficiently brought into contact with the cylindrical main body 10 and is forcibly sent in the direction of the dry product outlet 32.
Further, a part of the wet raw material scraped up by the blade members 42, 42,... Adheres in layers to the inner wall surface of the cylindrical main body portion 10, but the saw-like portions 44, 44 of the blade members 42, 42,. .. scraped off by force and sent to the direction of the dry product outlet 32.
In this way, the wet raw material is scraped up by the blade members 42, 42,... And forcedly sent in the direction of the dry product outlet 32 while being dried in contact with the hot air, and the dry product is accompanied by the hot air. Then, it is taken out from the dry product outlet 32.
According to the cylindrical drying apparatus shown in FIG. 2, it is possible to prevent the wet raw material from excessively staying in the same portion, and there are also few layers made of the wet raw material attached in layers to the inner wall surface of the cylindrical main body 10. As a result of being able to be scraped off by the scraping force, even if the components are reduced in weight and simplified, the raw raw wet raw material having adhesiveness can be quickly dried.
In the cylindrical drying apparatus shown in FIG. 1, temperature sensors such as thermocouples are attached to the hot air supply port 28, the hot air furnace 12, and the dried product outlet 32, so that these temperature sensors are maintained at a constant temperature. The raw material is charged into the hopper 14.

It is the schematic explaining the outline of the cylindrical drying apparatus which concerns on this invention. It is a longitudinal cross-sectional view explaining the internal structure of the cylindrical main-body part 10 shown in FIG. FIG. 3 is a front view of a support member 36 shown in FIG. 2. It is a longitudinal cross-sectional view explaining the conventional drying apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cylindrical main-body part 12 Hot-blast furnace 28 Hot-air supply port 29 Drive motor 30 Raw material supply port 32 Dry goods outlet 34 Rotating shaft 36 Support member 40 Ring-shaped member 42 Blade member 44 Saw-shaped part 44, 44 Saw-shaped part A Tip part B Intermediate part C Rear end part θ Inclination angle

Claims (4)

A raw raw wet raw material having adhesive force supplied to one end of the cylindrical main body is brought into contact with the hot air supplied to the one end from a hot air furnace in the direction of the other end of the cylindrical main body. In a cylindrical drying device for feeding and drying the wet raw material with hot air,
A rotating shaft provided in the cylindrical main body and rotated by driving means, a plurality of supporting members fixed to the rotating shaft at intervals, and the supporting member close to the inner wall surface of the cylindrical main body. And extending from the vicinity of the raw material supply port of the wet raw material provided at one end of the cylindrical main body to the vicinity of the dry product outlet provided at the other end, and the cylindrical main body A plurality of blade members provided at equal intervals in the circumferential direction of the part,
When the plurality of blade members rotate with the rotation of the rotating shaft, the feed force in the direction of the dry product outlet can be applied to the wet raw material supplied from the raw material supply port. At least the vicinity of each raw material supply port of the blade member is provided inclined with respect to the rotating shaft,
In addition, the vicinity of each raw material supply port of the blade member is a saw-like portion in which the end surface on the inner wall surface of the cylindrical main body portion is formed into a saw-like uneven portion, and each convex portion of each saw-like portion of the blade member. The part is formed so as to correspond to each concave part of the saw-shaped part formed on the adjacent blade member so that the rotational locus does not overlap with the rotational locus of each convex part of the saw-shaped part formed on both adjacent blade members. A cylindrical drying apparatus, wherein a layer made of a wet raw material formed on the inner wall surface of the cylindrical main body portion is scraped off by a saw-like portion on the end surface on the inner wall surface of each blade member .   The cylindrical drying device according to claim 1, wherein the blade member positioned in the vicinity of the dry product outlet is provided in parallel to the rotating shaft.   The supporting member is composed of a plurality of extending members that extend radially from the rotating shaft, and ring-shaped members that are fixed to the respective distal end portions of the extending members, and corresponds to the extending members. The cylindrical drying apparatus according to claim 1 or 2, wherein a blade member is fixed to the member. The blade member is provided so as to be inclined with respect to the rotating shaft from an end of the cylindrical main body on the side of the raw material supply port to an intermediate portion between the vicinity of the raw material supply port and the vicinity of the dry product outlet. Item 4. The cylindrical drying device according to any one of Items 1 to 3.