JP2014205179A - Roller type dewatering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller type dewatering device which can be applied to various water-containing materials including a woody material, improves dewatering capacity by a simple configuration, and improves dewatering efficiency.SOLUTION: A roller type dewatering device 10 of the present invention comprises: a pair of upper and lower rollers 14, 15 which are rotatably attached to a base 13 so that their rotary shafts 11, 12 are parallel to each other and whose rotational directions are different; and a supply conveyor 16 for supplying a water-containing material between the pair of upper and lower rollers 14, 15. The water-containing material supplied from the supply conveyor 16 is compressed between the pair of upper and lower rollers 14, 15 to be dewatered. The rotary shaft 11 of the upper roller 14 located on the upper side in the pair of upper and lower rollers 14, 15 is arranged on the supply conveyor 16 side with respect to the rotary shaft 12 of the lower roller 15 located on the lower side.

Description

  The present invention relates to a roller-type dewatering device that enhances the dewatering efficiency of various hydrated materials such as wooden materials.

  In order to effectively use hydrated materials such as wooden materials, sludge, and food residues as resources, it is essential to dry or dehydrate these hydrated materials. Methods for drying hydrated materials include natural drying and the use of drying equipment that uses thermal energy, but natural drying takes time and is not efficient, and using thermal energy is costly and profitable. Do not fit.

  Therefore, conventionally, as a device for dehydrating a hydrous material that does not require thermal energy, dehydration is performed by supplying the hydrous material between a pair of rollers whose rotation axes are parallel, and pressing the hydrous material between the pair of rollers. Various dehydration apparatuses have been disclosed (see, for example, Patent Document 1 and Patent Document 2). The roll pressurizing dehydrator disclosed in Patent Document 1 includes two parallel dewatering rolls and a dehydrated material supply means for supplying a dehydrated material (= water-containing material) between the dewatering rolls. Become. The dehydrated material is dewatered by rolling between two dewatering rolls, and the separated water separated from the dehydrated material by the rolling pressure is pushed back to the dehydrated material supply means side.

  Further, the dehydrated device for hydrous material disclosed in Patent Document 2 also includes one roller and the other roller whose rotation axes are parallel to each other, and supplies the hydrous material from the side where the rotation directions of the rollers are close to each other. Then, moisture is squeezed from the hydrated material and discharged to the side where the rotation directions of the rollers are separated from each other. And the suction nozzle of the suction machine which formed many small holes in the wall part of one roller, and provided the opening slidably provided in the inner surface of one roller, and was squeezed between one roller and a rotation roller By wrapping a net-like endless belt through which moisture can pass, the dewatering ability is improved and the efficiency of the dewatering treatment is improved.

JP 2000-15297 A JP 2008-36666 A

  Among the hydrated materials, in particular, when wood material is effectively used as fuel, the wood material is processed into pellets or wood powder. However, the wood material generally has a high moisture content, and if the wood material contains a large amount of water, it becomes difficult to pelletize the wood material into a wood powder. Therefore, drying or dehydration of the wood material is important as a pretreatment for performing these processes. However, since drying of the wood material is not preferable in terms of time and cost as described above, it is easy and low cost. From the above, dehydration treatment by pressing can be mentioned as a suitable treatment method.

  And even if it is based on the dehydration apparatus disclosed by patent document 1 or patent document 2, the dehydration effect according to the kind of hydrated substance can be anticipated to some extent. However, the dehydration apparatus disclosed in Patent Document 1 is for sludge, and it is difficult to apply as it is to a hydrated material such as a wooden material, and there is a possibility that the compressed water may flow out to the sludge discharge side. .

  Further, according to the dehydrating device disclosed in Patent Document 2, there is a possibility that the small hole formed in the wall portion of the one roller may be clogged by the water-containing material, and when this small hole causes clogging, The ability to suck the compressed water is reduced, and sufficient dehydration treatment becomes difficult. Furthermore, since the structure of the apparatus itself is very complicated, there is a risk that the cost may increase.

  Therefore, in view of the above problems, the present inventors provide a roller type dehydrating apparatus that can be applied to various hydrated materials such as wooden materials, improves dewatering ability with a simple configuration, and improves dewatering efficiency. As a result of intensive studies, the present invention has been achieved.

  That is, the roller-type dewatering device of the present invention is configured to supply a hydrated material between a pair of upper and lower rollers that are pivotally mounted on a base with a rotation axis parallel and have different rotation directions. A roller type dewatering device configured to squeeze the hydrated material supplied from the supply conveyor between the pair of upper and lower rollers, wherein the hydrated product is dehydrated. Among these, the rotating shaft of the upper roller positioned on the upper side is disposed on the supply conveyor side with respect to the rotating shaft of the lower roller positioned on the lower side.

  In the roller type dehydrating apparatus of the present invention, a groove is formed on the surface of the roller along the rotation direction of the roller.

  Furthermore, in the roller-type dewatering device of the present invention, the roller is composed of a roller main body and a liner that is detachable on the surface of the roller main body, and the groove is formed on the surface of the liner. .

  In the roller type dehydrating apparatus according to the present invention, a pressing mechanism for applying a downward and / or upward pressing force to the upper roller and / or the lower roller is provided.

  According to the roller-type dewatering device of the present invention, the rotation shaft of the upper roller located on the upper side of the pair of upper and lower rollers is disposed on the supply conveyor side with respect to the rotation shaft of the lower roller located on the lower side. Therefore, the water squeezed between the pair of upper and lower rollers can be easily guided to the supply conveyor side, and the dewatering ability can be improved with a simple configuration.

  Further, in the roller type dewatering device of the present invention, by forming a groove on the surface of the roller along the rotation direction of the roller, the dewatering efficiency can be further improved, and the hydrated material is disposed between the pair of upper and lower rollers. It is also possible to cut while pressing. Therefore, for example, if the hydrated material is a wooden material, cutting the wooden material while dewatering improves the dewatering efficiency and improves the processing efficiency of the wooden material.

  Furthermore, in the roller-type dewatering device of the present invention, the roller is composed of a roller body and a liner that is detachable on the surface of the roller body, and a groove is formed on the surface of the liner so that only the liner is worn when the groove is worn. What is necessary is just to replace | exchange and the reduction of a maintenance cost can be aimed at.

  Further, in the roller type dewatering device of the present invention, by providing a pressing mechanism for applying a downward and / or upward pressing force to the upper roller and / or the lower roller, a predetermined amount of water content is squeezed. It is possible to improve the dehydration capacity by applying a pressing force.If hard foreign matter is mixed in the hydrated material, it becomes an overload state, and by detecting this overload state and releasing the pressing force, It is possible to prevent the roller from being damaged.

It is a schematic side view which shows one Embodiment of the roller-type dehydrator of this invention. It is a schematic sectional drawing of the roller-type dehydrator shown in FIG. (A) is sectional drawing of the roller which concerns on the roller-type dehydrator shown in FIG. 1, (b) is a top view.

  Hereinafter, an embodiment of a roller type dehydrator according to the present invention will be described with reference to the drawings.

  A roller type dehydrator 10 according to an embodiment of the present invention shown in FIGS. 1 and 2 includes a pair of upper and lower rollers 14 and 15 that are mounted on a base 13 with rotating shafts 11 and 12 in parallel, A supply conveyor 16 for supplying hydrated material between the pair of rollers 14 and 15 is included. The hydrated product is dehydrated by pressing the hydrated product supplied from the supply conveyor 16 between the pair of upper and lower rollers 14 and 15.

  More specifically, of the pair of upper and lower rollers 14, 15, the upper roller 14 located on the upper side is endless between the sprocket 20 provided on the rotating shaft 11 of the upper roller 14 and the sprocket 22 included in the speed reducer 21. The chain 23 is bridged and rotates in the clockwise direction in FIG. On the other hand, in the lower roller 15 located on the lower side, an endless chain 27 is bridged between a sprocket 24 provided on the rotary shaft 12 of the lower roller 15 and a sprocket 26 provided in the speed reducer 25. Rotates counterclockwise.

  Moreover, the supply conveyor 16 which concerns on the roller-type dehydration apparatus 10 of this embodiment is provided with the supply hopper 28, and becomes a structure which can supply a hydrated material automatically. In addition, this supply conveyor 16 changes the supply angle of a hydrated material like the supply conveyor 16 shown with the broken line in FIG. 2, or changes the supply position of a hydrated material in the width direction of the rollers 14 and 15. The configuration is possible.

  And the rotating shaft 11 of the upper roller 14 which concerns on the roller-type dehydrator 10 of this embodiment is arrange | positioned with respect to the rotating shaft 12 of the lower roller 15 at the supply conveyor 16 side. That is, the rotating shaft 11 and the rotating shaft 12 do not coincide with each other in the vertical direction, and are slightly shifted from side to side in a side view. In addition, the deviation | shift amount of these rotating shafts 11 and 12 should just be about 50-100 mm, and about 60-80 mm is more preferable.

  Further, as shown in FIG. 3, the upper roller 14 and the lower roller 15 according to the roller type dehydrating apparatus 10 of the present embodiment are each a roller main body 30 and a liner 31 that is detachably attached to the surface of the roller main body 30. It consists of and. In this embodiment, the liner 31 is divided into four in parallel to the rotating shaft 11 (12), and each liner 31 is attached to the roller body 30 with a bolt 32.

  Further, a plurality of grooves 33 are formed on the surface 31a of the liner 31 along the rotational direction of the roller 14 (15). The width and depth of the groove 33 are not particularly limited, but the width of the groove 33 is preferably about 6 to 12 mm, and particularly preferably about 8 to 10 mm. Further, the depth of the groove 33 may be about 2 to 3 mm, and the upper roller 14 and the lower roller 15 are disposed in a state where the groove 33 of the upper roller 14 and the groove 33 of the lower roller 15 are engaged with each other by about 2 mm. It is preferred that In each figure, reference numeral 34 denotes a comb tooth for preventing clogging of the groove 33 formed in the upper roller 14, and reference numeral 35 denotes a groove 33 formed in the lower roller 15. It is a comb tooth to prevent clogging.

  Further, in the roller type dehydrator 10 of the present embodiment, a pressing mechanism 40 for applying a downward pressing force to the upper roller 14 is provided. The pressing mechanism 40 includes a hydraulic cylinder 41 installed on the upper portion of the base 13, a movable member 43 attached to the lower end of the hydraulic cylinder 41, arranged in parallel to the rotation shaft 11 of the upper roller 14, Operation members 46 and 47 that extend downward from both ends and are coupled to both bearings 44 and 45 of the rotating shaft 11 are configured. In the pressing mechanism 40, when the hydraulic cylinder 41 moves downward, the movable member 43 and the operating members 46 and 47 are pressed downward accordingly, and the bearings 44 and 45 are connected to the operating members 46 and 47. When the rotating shaft 11 is pressed downward, a downward pressing force is applied to the upper roller 14. The pressing force by the pressing mechanism 40 is not particularly limited and is appropriately selected according to the type of hydrated material, but is preferably set to about 10 MPa to 50 MPa.

  The dehydration process by the roller-type dehydrator 10 according to the present embodiment having the above-described configuration will be described. A hydrated material is introduced into a supply hopper 28 from a hydrated material conveyance conveyor (not shown). Sequentially fed between the rollers 15. And if a hydrated material is sent between the upper roller 14 to which the downward pressing force is given by the press mechanism 40, and the lower roller 15, it will squeeze between these rollers 14 and 15, and will spin-dry | dehydrate by compression. The hydrated material thus discharged is discharged from between the rollers 14 and 15 to the opposite side of the supply conveyor 16 and conveyed to the next process by a discharge conveyor (not shown). On the other hand, moisture generated by squeezing the hydrated material between the rollers 14 and 15 is naturally guided to the lower side of the supply conveyor 16 through the groove 33 of the lower roller 15. This is because the rotary shaft 12 of the lower roller 15 is disposed on the opposite side of the supply conveyor 16 with respect to the rotary shaft 11 of the upper roller 14, so that the portion containing the most water content, that is, the upper roller 14 The closest part of the lower roller 15 is located at a position slightly lower than the top of the outer peripheral surface of the lower roller 15 on the supply conveyor 16 side. Accordingly, the moisture generated until reaching the closest portion of the upper roller 14 and the lower roller 15 is unlikely to exceed the top of the outer peripheral surface of the lower roller 15, and the supply conveyor is provided via the groove 33 of the lower roller 15. It will be discharged naturally downward on the 16th side.

  And the groove | channel 33 with which the upper side roller 14 and the lower roller 15 which squeezed the hydrated substance are cleaned by the comb teeth 34 and 35 will squeeze the hydrated substance supplied from the supply conveyor 16 again.

  Further, when hard foreign matter is mixed in the hydrated material supplied from the supply conveyor 16, the hydraulic unit (not shown) detects an overload state on the upper roller 14 and releases the pressing force, whereby the pressing mechanism Thus, the upper roller 14 and the lower roller 15 can be prevented from being damaged.

  As described above, according to the roller type dehydrator 10 according to the present embodiment, the rotation shaft 11 of the upper roller 14 out of the pair of upper and lower rollers 14 and 15 is supplied to the rotation shaft 12 of the lower roller 15. Since the water is squeezed between the pair of upper and lower rollers 14 and 15, the water can be easily guided to the supply conveyor 16 side, and the dewatering ability can be improved with a simple configuration.

  Further, the roller 14 (15) according to the roller type dehydrating apparatus 10 of the present embodiment includes a roller main body 30 and a liner 31 that is detachable on the surface of the roller main body 30, and a groove 33 is formed on the surface 31a of the liner 31. By doing so, first, the dehydration efficiency can be further improved, and the water-containing material can be cut while being compressed between the pair of upper and lower rollers 14 and 15. Therefore, for example, if the hydrated material is a wooden material, cutting the wooden material while dewatering improves the dewatering efficiency and improves the processing efficiency of the wooden material. Furthermore, when the groove 33 is worn, only the liner 31 needs to be replaced, and the maintenance cost can be reduced.

  Further, in the roller type dehydrating apparatus 10 of the present embodiment, by providing the upper roller 14 with a pressing mechanism 40 for applying a downward pressing force, a predetermined pressing force is applied when the hydrated material is squeezed. The dewatering capacity can be improved, and if hard foreign matter is mixed in the hydrated material, it becomes overloaded, and the roller is prevented from being damaged by detecting this overloaded condition and releasing the pressing force. be able to.

  As mentioned above, although the roller-type dehydrating apparatus 10 which concerns on one Embodiment of this invention was explained in full detail, it should not be understood that the technical idea of this invention is limited substantially. For example, in the roller type dehydrating apparatus 10 of the present embodiment, the rollers 14 and 15 are constituted by the roller main body 30 and the liner 31, and the groove 33 is formed in the liner 31, but the embodiment of the rollers 14 and 15 is limited to this. Alternatively, the groove 33 may be formed directly on the surface of the roller main body 30 or the groove 33 may not be formed in the first place. Even if the groove 33 is not formed, the rotation shaft 11 of the upper roller 14 is disposed on the supply conveyor 16 side with respect to the rotation shaft 12 of the lower roller 15, and therefore, between the pair of upper and lower rollers 14, 15. The compressed water can be easily guided to the supply conveyor 16 side, and the dewatering ability can be sufficiently improved.

  Further, the rotational speed of the pair of upper and lower rollers 14 and 15 is not particularly limited, and can be arbitrarily set according to the type and moisture content of the hydrated material. For example, when dehydrating wood bark (bark), In the case of sawdust, it is more preferably about 1.3 to 2.6 m / min.

  Furthermore, it is preferable that the feed amount of the hydrated material supplied from the supply conveyor 16 is about 50 to 100 mm in layer thickness from the viewpoint of improving the dehydration efficiency.

  Further, although the pressing mechanism 40 is provided on the upper roller 14 according to the roller type dehydrating apparatus 10 of the present embodiment and a downward pressing force is applied to the upper roller 14, the pressing mechanism 40 is provided on the lower roller 15. The upper roller 14 may be configured to apply an upward pressing force, or may be provided on both the upper roller 14 and the lower roller 15 to apply the pressing force to each other. The present invention can be carried out without departing from the gist, with appropriate improvements, changes, or additions based on the inventive ideas and ideas of those skilled in the art.

DESCRIPTION OF SYMBOLS 10: Roller type dehydrator 11, 12: Rotating shaft 13: Base 14: Upper roller 15: Lower roller 16: Supply conveyor 20, 22, 24, 26: Sprocket 21, 25: Reducer 23, 27: Endless chain 28: Supply hopper 30: Roller body 31: Liner 32: Bolt 33: Groove 34, 35: Comb teeth 40: Pressing mechanism 41: Hydraulic cylinder 43: Movable member 44, 45: Bearing 46, 47 Actuating member

Claims (4)

A pair of upper and lower rollers that are mounted on the base with the rotation axis parallel and that have different rotation directions, and a supply conveyor that supplies water-containing material between the pair of upper and lower rollers. A roller-type dehydrator that dehydrates the hydrated product by squeezing the hydrated product supplied from the conveyor between the pair of upper and lower rollers,
Among the pair of upper and lower rollers, a roller type characterized in that an upper roller rotating shaft positioned on the upper side is disposed on the supply conveyor side with respect to a lower roller rotating shaft positioned on the lower side. Dehydration device.   The roller-type dewatering device according to claim 1, wherein a groove is formed on a surface of the roller along a rotation direction of the roller.   The roller-type dewatering device according to claim 2, wherein the roller includes a roller main body and a liner that is detachably attached to the surface of the roller main body, and the groove is formed on the surface of the liner.   The roller according to any one of claims 1 to 3, wherein a pressing mechanism for applying a downward and / or upward pressing force to the upper roller and / or the lower roller is provided. Type dehydrator.

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