JP2008304080A - Disk type processor - Google Patents

Abstract

Disclosed is a disk-type processing apparatus capable of reducing friction and compression caused by an object to be dried on a heat transfer surface of a stirring blade to reduce wear on the heat transfer surface and pulverization of the object to be dried. .
A fixed body having a cylindrical body with side walls provided at both ends and a plurality of stirring blades 22 connected in the axial direction of the cylindrical body are rotatably inserted into the fixed body. A to-be-dried object supplied to the cylindrical body while being agitated by the agitating blades and dried in the axial direction toward the to-be-dried object discharge portion provided on the stationary body. In the disk type processing apparatus, a through hole 25 through which the material to be dried can flow is formed in the axial direction on the inner peripheral side of the stirring blade 22.
[Selection] Figure 3

Description

  The present invention relates to a general-purpose industrial product, a heat treatment, reaction, drying, cooling treatment, etc. for fish meal, industrial waste sludge, sludge, etc., and a stirring type heating type disk type processing apparatus having a heat medium inside. is there.

Generally, processed products such as general industrial products, fish meal, industrial waste sludge, sludge, etc. are evaporated and dried by a processing device such as a drying device to reduce the amount and reuse it. Has been done.
When evaporating and drying by such a processing machine, the contact member such as a container is heated by a direct drying method in which drying is performed by blowing hot air directly on the processed material, or a heating medium such as hot air is used for heating. There is an indirect drying method in which a member is brought into contact with a processed material and dried without applying a heat medium directly to the processed material.

  As a processing apparatus employing such an indirect drying method, a disk-type processing apparatus including a fixed body having a cylindrical body with side walls provided at both ends, and a rotating shaft that is rotatably inserted into the fixed body. Is disclosed (for example, see Patent Document 1).

In such a disk type processing apparatus, a plurality of stirring blades are connected to the rotating shaft, and each stirring blade is heated as a structure having a heat medium inside each stirring blade, and supplied to the inside of the cylindrical body. The dried material to be dried is transferred while being stirred and dried with a plurality of stirring blades. At this time, by providing a plurality of stirring blades, the contact area with the object to be dried is increased and the object to be dried can be efficiently dried.
JP 2002-250590 A

  However, the stirring blades of the disk-type processing apparatus are likely to wear on the heat transfer surface due to contact with the object to be dried, and friction due to excessive drying or contact of the object to be dried is caused by the powder being dried. There was a problem that it became easy to scatter and it became difficult to handle the object to be dried due to dust generation.

  The present invention has been made in consideration of such circumstances, and wear on the heat transfer surface and fine powder of the material to be dried are suppressed by suppressing excessive friction and compression by the material to be dried on the heat transfer surface of the stirring blade. It is an object of the present invention to provide a disk-type processing apparatus that can reduce the number of units.

In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 has a fixed body having a cylindrical body with side walls provided at both ends, and a plurality of stirring blades connected in the axial direction of the cylindrical body, and is rotatable about the fixed body. A to-be-dried object supplied to the cylindrical body while being agitated by the agitating blade, and transferred in the axial direction to the to-be-dried object discharge portion provided on the fixed body. In the disk-type processing apparatus, the through-hole through which the material to be dried is allowed to flow is formed in the axial direction on the inner peripheral side of the stirring blade.

According to the disk-type processing apparatus of the present invention, the object to be dried can be transferred in the axial direction through the through hole formed on the inner peripheral side of the stirring blade, so that the degree of freedom of movement of the object to be dried is improved. Agitation of the dried product is improved.
In addition, a part of the object to be dried that has contacted the inner peripheral side of the stirring blade can be transferred in the axial direction on the inner peripheral side of the stirring blade through the through hole without reaching the outer peripheral portion of the stirring blade. Thus, contact between the object to be dried and the heat transfer surface is suppressed, and friction and compression on the heat transfer surface are suppressed.

  The invention according to claim 2 is the disk-type processing apparatus according to claim 1, wherein a plurality of the through holes are formed in each stirring blade.

  According to the disk-type processing apparatus according to the present invention, each of the stirring blades has a plurality of through holes. Therefore, in a short time with respect to the rotation period of the stirring blade, and at a plurality of circumferential positions of the stirring blade. Since it is transferred in the axial direction, the occurrence of uneven transfer and the stagnation of the object to be dried are suppressed.

  The invention according to claim 3 is the disk-type processing apparatus according to claim 1 or 2, wherein the through-holes are respectively the stirring blades and the stirring blades provided adjacent to each other. A circumferential position of the through hole around the rotation axis is shifted and arranged.

  According to the disk type processing apparatus of the present invention, since the through holes are formed so as to be shifted from the through holes of the stirring blades arranged adjacent to each other around the rotation axis, they are arranged adjacent to each other when transferring the object to be dried. Stagnation between the heat transfer surfaces of the two stirring blades is suppressed, and friction and compression between the object to be dried and the heat transfer surface are suppressed.

According to the disk type processing apparatus according to the present invention, the degree of freedom of movement of the object to be dried is improved, and friction and compression of the object to be dried by the stirring action on the heat transfer surface of the stirring blade are suppressed, Wear can be reduced.
In addition, pulverization of the material to be dried can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The disc-type processing apparatus 1 in this embodiment is an aspect of a drying apparatus that employs an indirect drying method, and is inserted into a hollow fixed body 2 and the fixed body 2 so as to be rotatable as shown in FIG. The to-be-dried object W1 supplied in the cylindrical body 13 which comprises the rotating shaft 3 and which comprises the fixed body 2 is directed toward the to-be-dried object discharge | emission part 13B provided in the fixed body 2. The mixture is stirred and dried while being transferred in the direction of the axis (axis) O.

  The fixed body 2 includes a cylindrical body 13 that is horizontally placed and provided with side walls 11 and 12 at both ends, and a jacket (not shown) that is provided so as to cover the outer peripheral surface of the cylindrical body 13. .

  The cylindrical body 13 has a cylindrical shape in cross section, and a to-be-dried object introducing portion 13A for supplying the to-be-dried object W1 is provided on the upper surface on the side wall 11 side, and the inside of the cylindrical body 13 is transferred to the lower surface on the side wall 12 side. A to-be-dried object discharge unit 13B that discharges the processed object to be dried W2 is provided. The to-be-dried material introducing portion 13A is provided slightly on the side wall 12 side with respect to the side wall 11, and the to-be-dried material discharging portion 13B is provided on the side wall 11 side slightly with respect to the side wall 12.

Here, in the disc-type processing apparatus 1 of the present specification, one end of the cylindrical body 13 on the side where the dried material introducing portion 13A is provided is the upstream end, and one end on the side where the dried material discharging portion 13B is provided. Called the downstream end.
Further, the cylindrical body 13 introduces air into the moisture exhaust port 13D for exhausting water vapor generated by heating the object to be dried and the cylindrical body 13 to adjust the pressure inside the cylindrical body 13 and the like. An air inlet 13C is provided.

The cylindrical body 13 is provided with a plurality of fixing plates 14 from the upper inner peripheral surface toward the axis of the rotary shaft 3.
The fixing plate 14 is provided so as to protrude between a plurality of stirring blades 22 described later.

The rotating shaft 3 includes a rotating shaft main body 21 and a plurality of stirring blades 22 connected in the direction of the axis O of the cylindrical body 13 and is rotatably inserted in the fixed body 2. 1 can be rotated in the direction of arrow A shown in FIG.
The rotating shaft main body 21 is formed in a cylindrical shape, and a steam inlet 21 </ b> A for introducing the steam S as a heat medium is provided outside the downstream end of the fixed body 2 in the rotating shaft main body 21.
The rotation axis of the rotary shaft 3 and the stirring blade 22 is concentric with the axis O of the cylindrical body 13.

The plurality of stirring blades 22 are provided to increase the contact area with the material to be dried, and are arranged at equal intervals in the direction of the axis O of the rotating shaft main body 21.
As shown in FIGS. 2 and 3, the stirring blade 22 bulges on both the upstream side and the downstream side in the direction of the axis O, and has a disk shape formed hollow. The hollow portion is continuously provided so that the circulating steam can flow in the stirring blade 22.

As shown in FIG. 2, the stirring blade 22 includes a cylindrical wall portion 22A extending outward in the direction of the axis O on the inner peripheral side of both side surfaces, and a rotating shaft main body on the inner periphery of the cylindrical wall portion 22A. 21 is inserted and attached to the rotary shaft main body 21.
Further, as shown in FIGS. 2 to 4, each stirring blade 22 is formed with a through hole 25 penetrating in the direction of the axis O on the inner peripheral side so that the material to be dried can flow freely in the direction of the axis O. Has been.

  The through hole 25 has a cylindrical body 26 of a length that can connect one heat transfer surface of the stirring blade 22 and the other heat transfer surface into the holes formed in the wall portions on both sides of the stirring blade 22. The both ends of the cylindrical body 26 are welded over the entire circumference of the peripheral edge of the hole formed in the wall on both sides, so that the inside and outside of the stirring blade 22 are secured.

In this embodiment, the through hole 25 formed in the stirring blade 22 has a distance between both ends of 50 mm and an inner diameter of 150 mm.
In order to allow the material to be dried W1 to flow freely, the inner diameter of the through hole 25 is preferably set to 100 mm to 200 mm.

As shown in FIG. 4, the four stirring blades 22 of this embodiment are each formed with four through holes 25 at concentric positions in the circumferential direction with an inner peripheral angle of 90 ° centering on the axis O of the rotating shaft. ing.
In addition, as shown in the conceptual diagram of FIG. 5, each of the stirring blades 22 provided continuously has a through-hole 25 in the rotation direction A rear side of the rotation shaft 3 with respect to the stirring blade 22 disposed adjacent to the upstream side. As a result, the through holes 25 formed in the respective stirring blades 22 are arranged so that the through holes 25 of the downstream stirring blades 22 penetrate the upstream stirring blades 22. With respect to the hole 25, it is arranged around the axis O and shifted by 45 ° to the rear side in the rotational direction.

  Further, the agitating blade 22 is arranged at a predetermined interval in the circumferential direction of a plurality (three in this embodiment) of concentric circles centering on the axis O of the rotating shaft main body 21, and the upstream heat transfer surface A plurality of connecting members 27 for connecting the blade member constituting the blade member and the blade member constituting the downstream heat transfer surface in the direction of the axis O are provided while ensuring the secrecy inside the stirring blade 22, and these connecting members 27 strengthens the connection strength of the stirring blades 22.

  Brackets 31 as shown in FIG. 4 are provided on the outer peripheral portion 22B of the stirring blades 22 at, for example, four positions at intervals of 90 ° in the circumferential direction. 32, flat blades 33 are attached.

  As shown in FIGS. 6A and 6B, the feed blade 32 has one side of a mounting member 32A formed in a rectangular flat plate shape parallel to any side of the blade member 32B formed in a rectangular flat plate shape. It is connected to the surface of the blade member 32B, and each surface of the attachment member 32A and the blade member 32B is connected at a predetermined angle with the connection portion interposed therebetween.

  Further, the feed blade 32 can be attached to the bracket 31 of the stirring blade 22 by an attachment hole 32C formed in the attachment member 32A, and the feed blade 32 rotates the rotary shaft 3 while being attached to the bracket 31. By doing so, motion in the circumferential direction and the axis O direction with respect to the stirring blade 22 is imparted to the material to be dried W1, and the material to be dried W1 is transferred from the upstream side to the downstream side.

  As shown in FIGS. 7A and 7B, the flat blade 33 has a mounting member 33A formed in a rectangular flat plate shape on the surface of the flat blade member 33B formed in a rectangular flat plate shape. It is formed in a substantially L shape by standing and connecting in parallel with the side, and can be attached to the bracket 31 by an attachment hole 33C formed in the attachment member 33A, and the flat blade 33 is attached to the bracket 31. In this state, the rotating shaft 3 is rotated to give the object to be dried W1 movement in the circumferential direction of the stirring blade 22.

Two pairs of the feed blades 32 are attached on the upstream side of the cylindrical body 13 with an interval of 180 ° in the circumferential direction of the stirring blade 22, and one set is attached on the downstream side.
Further, the flat blade 33 is not attached to the upstream side in the direction of the axis O, but one piece is attached to the stirring blade 22 on the downstream side.

  Next, the drying method of the to-be-dried object W1 using the disk type processing apparatus 1 having such a configuration will be described. First, the steam S, which is a heat medium, is supplied into the rotary shaft main body 21 from the steam inlet 21 </ b> A. Thereby, the some stirring blade 22 is heated with the vapor | steam which distribute | circulates an inside. Further, the cylindrical body 13 is heated by introducing the steam S as a heat medium into the jacket.

  Next, the rotating shaft 3 is rotated, and the material to be dried W1 is supplied from the material to be dried introducing portion 13A. The supplied to-be-dried material W1 is deposited on the lower inner peripheral surface of the cylindrical body 13, and is agitated by the agitating blade 22 as the rotating shaft 3 rotates and is transferred from the upstream side toward the downstream side. Is done.

  The to-be-dried object W1 transported in the cylindrical body 13 comes into contact with the rotary shaft main body 21 and the stirring blade 22 heated by the steam S and the inner peripheral surface of the cylindrical body 13 so that the moisture in the to-be-dried object W1 is Evaporate to dry. Water vapor or the like generated from the material to be dried W1 by drying the material to be dried W1 is exhausted to the outside of the fixed body 2 through the moisture exhaust port 13D.

When the material to be dried W1 is being dried, depending on the amount of water in the material to be dried W1, the material to be dried W1 in this state may adhere to the side wall 11 or the stirring blade 22. . The material to be dried W1 adhering to the stirring blades 22 is scraped off by the fixing plate 14 provided so as to protrude from the inner peripheral surface of the cylindrical body 13 between the stirring blades 22.
The object to be dried W1 scraped off by the fixing plate 14 is transported toward the object to be dried discharge portion 13B while being stirred and dried by the stirring blades 22.

  Further, the material to be dried adhered to the side wall 11 is scraped off by a scraping blade (not shown), and the material to be dried W1 scraped off by the scraping blade is transferred from the upstream side to the downstream side and adhered to the side wall 11. In the same manner as other dried objects that have not been carried out, they are transferred toward the dried object discharge section 13B while being stirred and dried by the stirring blades 22.

  In this agitation and transfer process, the material to be dried W1 is transferred to the downstream side in the axis O direction in addition to the outer periphery of the stirring blade 22, and a part of the material to be dried W1 is stirred. It passes through the through hole 25 of the blade 22 and is transferred downstream at a position on the inner peripheral side of the stirring blade 22.

  Moreover, the to-be-dried object W1 which passed the through-hole 25 of one stirring blade 22 and was transferred to the downstream side is the height in which the through-hole 25 is formed in the space between the downstream stirring blades 22. That is, it is located relatively above the accumulated material to be dried W1, but moves to a deeper position by being stirred, and partly passes through the through hole 25 of the downstream stirring blade 22 and further moves downstream. Is done.

According to the disk-type processing apparatus 1 configured in this way, the object to be dried W1 is transferred in the direction of the axis O through the through hole 25 in addition to the outer peripheral portion of the stirring blade 22, and thus the degree of freedom of movement of the object to be dried. And the stirring of the material to be dried W1 is improved.
In addition, a part of the material to be dried W1 located on the inner peripheral side of the stirring blade 22 does not reach the outer peripheral portion of the stirring blade 22 and passes through the through hole 25 on the inner peripheral side of the stirring blade 22 in the axis O direction. Is transferred to the heat transfer surface of the stirring blade 22 of the object to be dried W1, and wear due to compression and friction is suppressed to the heat transfer surface.

  According to the disk-type processing apparatus 1 according to this embodiment, since the plurality of through holes 25 are formed in each stirring blade 22, the material to be dried W <b> 1 can pass through the through holes in a short time with respect to the rotation period of the stirring blade 22. 25, and is transferred in the direction of the axis O at a plurality of circumferential positions of the stirring blade 22, so that occurrence of uneven transfer and stagnation of the material to be dried W1 between the stirring blades 22 are suppressed.

According to the disk type processing apparatus 1 according to this embodiment, the respective stirring blades 22 are arranged so as to be shifted around the axis O of the rotating blade 3 and the stirring blade 22 arranged adjacent to each other. Since the through-hole 25 of the blade 22 and the through-hole 22 of the downstream stirring blade 22 are disposed around the axis of the rotary shaft 3 with a predetermined angle in the circumferential direction, the stagnation of the material to be dried W1 between the stirring blades 22 Is more suppressed.

As a result, the material to be dried W1 is transported without stagnation, and the generation of compression and friction on the heat transfer surface due to the stagnation of the material to be dried W1 is suppressed.
Moreover, since the compression and friction by the to-be-dried object W1 to the heat-transfer surface of the stirring blade 22 are suppressed, the pulverization of the to-be-dried object W1 can be reduced.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, although the case where the steam S is used as the heat medium has been described in the above embodiment, other heat medium such as hot water may be used.

Moreover, although the case where the through-hole 25 formed in the stirring blade 22 is circular has been described, for example, it may be a shape other than a circular shape such as an elliptical shape or a polygonal shape.
In addition, there are four through holes 25 formed in the stirring blades 22, and the case where the through holes 25 of the adjacent stirring blades 22 are displaced from the through holes 25 of the adjacent stirring blades 22 around the axis O with an inner peripheral angle of 45 ° will be described. However, the number and position of the through holes 25 formed in the respective stirring blades 22 and the deviation angle between the adjacent stirring blades 22 can be freely set. It is also possible to change freely between the stirring blades 22 positioned.
Further, the configuration of the feed blade 32 and the flat blade 33 and the arrangement of the stirring blade 22 can be arbitrarily set.

  According to this invention, with respect to the disk-type processing apparatus employing the indirect drying method, the degree of freedom regarding stirring of the object to be dried is improved, and friction and compression by the object to be dried on the heat transfer surface of the stirring blade are suppressed. Since the wear on the heat transfer surface and the pulverization of the material to be dried can be reduced, industrial applicability is recognized.

It is a figure showing one embodiment concerning the present invention, and is a longitudinal section which looked at a disk type processing device from the side. It is the longitudinal cross-sectional view which looked at the stirring blade of the disk type processing apparatus which concerns on one Embodiment of this invention from the side surface, The upper half has shown the position with a through-hole, and the lower half has shown the position without a through-hole. It is the detailed longitudinal cross-sectional view which looked at the position containing the through-hole of the stirring blade of the disk type processing apparatus which concerns on one Embodiment of this invention from the side surface. It is a front view of the stirring blade of the disk type processing apparatus concerning one embodiment of the present invention. It is a conceptual diagram which shows the example of arrangement | positioning of the stirring blade of the disk type processing apparatus which concerns on one Embodiment of this invention. It is a figure which shows the feed blade of the disk type processing apparatus which concerns on one Embodiment of this invention, (A) is a front view of a stirring blade, (B) saw the stirring blade from the radial direction outer side of the stirring blade (A It is SS sectional drawing of). It is a figure which shows the flat blade | wing of the disk type processing apparatus which concerns on one Embodiment of this invention, (A) is a front view of a stirring blade, (B) saw the stirring blade from the radial direction outer side of the stirring blade (A It is TT sectional drawing of).

Explanation of symbols

O Axis W1, W2 To-be-dried object 1 Disc type processing device 2 Fixed body 3 Rotating shaft 13 Cylindrical body 13B To-be-dried object discharge part 22 Stirring blade 25 Through-hole

Claims (3)

A fixed body having a cylindrical body provided with side walls at both ends;
A rotating shaft that has a plurality of stirring blades arranged in the axial direction of the cylindrical body and is rotatably inserted into the fixed body;
A disk-type processing apparatus that dries the material to be dried supplied into the cylindrical body while being transported in the axial direction toward the material to be dried discharge unit provided on the fixed body while being stirred by the stirring blade. And
On the inner peripheral side of the stirring blade,
A disk-type processing apparatus, wherein a through-hole through which the material to be dried is allowed to flow is formed in the axial direction. The disk-type processing apparatus according to claim 1,
A disk-type processing apparatus, wherein a plurality of the through holes are formed in each stirring blade. The disk-type processing apparatus according to claim 1 or 2,
Each of the stirring blades and the stirring blade provided adjacent to each other are arranged such that circumferential positions of the through holes around the rotation shaft are shifted from each other.

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