JPS6238216Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drying device for hydrated organic matter that kneads and compresses hydrated organic matter produced as by-products, grass, and waste from the agriculture and fisheries industry into pellets, and then dries the pellets through ventilation using a suction fan. .

Conventionally, when drying and solidifying grass, rice straw, etc., it has been either directly or indirectly exposed to hot air to dry it, cut it and press-molded it, or press-molded it and dried it with hot air. It had solidified. These conventional drying methods use electric heat or heat from combustion of petroleum as a heat source for hot air, and the ratio of this to the drying cost is large enough to carry out continuous drying, and cannot be ignored from the perspective of resource conservation. A more effective drying method was required. Furthermore, the cost of equipment such as a drying room was high, making it difficult to easily spread the method to general consumers.

To deal with this, in recent years, drying equipment has been proposed in which the material to be dried is kneaded and compressed using a molding machine such as a screw press, and the frictional heat generated at that time is used to dry the material through ventilation. There is. That is, as shown in FIG. 1, this drying apparatus consists of a heating molding machine 1 and a drying box 3 having a suction fan 2. The thermoforming machine 1 has a cylindrical casing 5 in which a hopper 4 for charging the material to be dried is provided at the rear upper part, and a screw shaft 7 having a helical blade 6 on the outer periphery is inserted into the cylindrical casing 5. has been done. The rear end of the screw shaft 7 protrudes from the rear wall of the cylindrical casing 5 and is supported by a bearing 8, and a pulley 9 is mounted between the cylindrical casing 5 and the bearing 8. On the other hand, a pulley 11 is attached to the rotating shaft of a motor 10 arranged in parallel to the cylindrical casing 5, and a belt 12 is stretched between the pulleys 9 and 11. The screw shaft 7 is configured to rotate through the screw shaft 7. Further, the diameter of the tip of the cylindrical casing 5 is slightly enlarged, and a retention chamber 13 is formed inside.
The opening of the cylindrical casing 5 is covered with a molded plate 15 having a large number of extruded holes 14. Further, the tip of the screw shaft 7 is supported at the center of the molding plate 15, and a cutting blade 16 is attached to the tip of the screw shaft 7 in close proximity to the molding plate 15. A belt conveyor 17 that goes in and out of the drying box 3 is installed below the tip of the cylindrical casing 5, and the belt of this belt conveyor 17 is formed of a net or the like to allow ventilation by the suction fan 2. There is.

Therefore, the material to be dried is inputted from the hopper 4, kneaded by the helical blades 6 of the screw shaft 7, transferred inside the cylindrical casing 5 to the left in the figure, and fed into the retention chamber 13. Further, the material to be dried is compressed in the retention chamber 13 and extruded into a rod shape through the extrusion hole 14 of the molding plate 15 under the cooperative action of the cutting blade 16 and the molding plate 15. At this time, a large amount of frictional heat is generated near the molding plate 15, and this heat heats the air ventilated by the suction fan 2 in the drying box 3. Therefore, the material to be dried, which is shaped into a rod, is transferred to the belt conveyor 1.
7, and as it moves through the drying box 3, it is dried by ventilation and taken out.

According to the drying apparatus shown in FIG. 1,
Electric heating can dry and solidify water-containing organic matter by just ventilation drying without using the combustion heat of petroleum, but this equipment can be applied to plants with a moisture content of 40% by weight or less, preferably 30% by weight. There was a restriction that the drying material was limited to less than % by weight. The reason for this is that with this device, the material to be dried is formed into a rod shape, and if the material contains a high moisture content, the moisture in the center of the rod material is difficult to dry, making it impossible to solidify it into a storable product. It is. For this reason, it is necessary to dry a material to be dried containing a high moisture content with hot air using electric heat or combustion heat, as in the past, to reduce the moisture content to 40 to 30% by weight or less. However, such pretreatment increases fuel costs and costs, so in reality, organic matter such as waste containing high moisture content is currently discarded without being utilized.

Therefore, the purpose of this invention is to reduce the moisture content from 30 to 40.
To provide a drying device for a water-containing organic substance capable of drying an organic substance containing a high water content of 40 to 30 weight % or less at low cost without using hot air drying.

According to the present invention, in a drying device equipped with a heating molding machine in which a screw shaft having a spiral blade on the outer periphery is inserted into a cylindrical casing and a drying box having a suction fan, the tip of the screw shaft has an enlarged diameter. The space between the inner wall of the cylindrical casing and the inner wall of the cylindrical casing is narrowed, and a spiral cutting edge wound in the same direction as the spiral blade is formed on the outer periphery of the tip of the screw shaft. By extruding it into thin flakes from the tip of the casing, the surface area is maximized and the moisture content floats to the surface, allowing it to quickly dry in the drying box to a moisture content of 40 to 30% by weight. .

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 to 6. In the figure, parts corresponding to those of the drying device in FIG. 1 are given the same reference numerals.

As shown in FIG. 2, the drying device according to the present invention has a heating molding machine 1 similar to that shown in FIG.
and a drying box 3 with a suction fan 2. Further, a separate cylindrical body 5a is fitted coaxially to the tip of the cylindrical casing 5 and is tightened and fixed by a tightening ring 18. In the present invention, a molded cylinder 19 having a larger diameter than the screw shaft 7 is coaxially attached to the tip of the screw shaft 7, and the molded cylinder 19 is wound around the outer periphery in the same direction as the helical blade 6. Curved spiral cutting blade 20
is formed. Referring also to FIG. 3, a mounting shaft 7a with a square cross section is formed at the tip of the screw shaft 7, while a mounting hole 19a into which the mounting shaft 7a fits is formed in the molded tube 19. By inserting the mounting shaft 7a into the mounting hole 19a, the molded cylinder 19 is coaxially mounted to the screw shaft 7 and rotates together with the screw shaft 7. In this case, the molded cylinder 19 has a tapered shape whose diameter increases slightly toward the distal end, and the gap between it and the inner wall of the cylinder 5a narrows further toward the distal end. Also, referring to FIG. 4, on the inner wall of the cylinder body 5a facing the outer periphery of the molding cylinder 19, a plurality of implanted cutting blades 21 are formed parallel to the axial direction at predetermined intervals, A groove 22 is formed between the implanted cutting edges 21.

In the above structure, the material to be dried is introduced from the hopper 4, and is kneaded by the helical blades 6 of the screw shaft 7 while being transferred inside the cylindrical casing 5 to the left in FIG. The kneaded material to be dried is pushed into the gap between the molded cylinder 19 and the cylinder body 5a at the tip of the screw shaft 7, and is kneaded and compressed by the spiral cutting blade 20 while being kneaded and compressed by the cylinder body 5a. Head towards the opening. In this case, the molding cylinder 19
Since the tip has a tapered diameter, the material to be dried becomes more compressed and thinner as it goes toward the opening of the cylindrical body 5a. Furthermore, since a plurality of grooves 22 are formed in the inner wall of the cylinder 5a in the axial direction, the material to be dried flows out from the opening of the cylinder 5a while being formed into a band shape by these grooves. The material to be dried thus formed has a flaky shape as shown in FIG. 5, breaks at a certain length due to its own weight, and falls onto the belt conveyor 17. and,
Since this flaky material to be dried is strongly compressed, moisture seeps out onto the surface, and this moisture is quickly evaporated to dryness by the suction fan 2 attached to the drying box 3. Moreover, since the flaky material to be dried is subjected to a considerable frictional force when flowing out from the opening of the cylinder 5a, it is heated to some extent, and this residual heat contributes to the evaporation and drying of the surface moisture. In this way, the moisture seeping out onto the surface of the flaky material to be dried is forcibly dehumidified and dried in the drying box 3. Therefore, even if the material to be dried contains a high moisture content, the moisture content can be reduced to 30 to 40% or less at low cost without requiring a heat source such as hot air drying. It can be applied to drying equipment.

In the above-mentioned embodiment, the implanted cutting edge 21 and the groove 22 may not be provided on the inner wall of the cylinder 5a, and in that case, the material to be dried is placed in a cylinder as shown in FIG. It will be pushed out in a shape. Further, the drying box 3 may be provided separately from the heating molding machine 1, and in that case, the means for introducing the flaky material to be dried into the drying box 3 is not limited to the belt conveyor 17. Further, although the boundary between the screw shaft 7 and the molding cylinder 19 is stepped, this portion can also be formed into a tapered shape. The cylinder 19 and the cylinder body 5a smoothly mold the dried material.
can be introduced between the inner wall of the moreover,
This drying apparatus is not only used as a pretreatment for application to the drying apparatus shown in FIG. 1, but also can solidify water-containing organic substances by itself. In particular, according to this drying device, the forming plate 15 is different from the drying device shown in FIG.
Highly fibrous materials to be dried, such as rice husks and rice straw, which are difficult to apply directly to the extrusion holes 14, can also be solidified.

As explained above, according to the present invention, in a drying apparatus equipped with a heating molding machine in which a screw shaft having a spiral blade on the outer periphery is inserted into a cylindrical casing, and a drying box having a suction fan,
The tip of the screw shaft is enlarged in diameter to narrow the gap with the inner wall of the cylindrical casing, and a helical cutting edge is formed on the outer periphery of the tip of the screw shaft, wound in the same direction as the helical blade. As a result, the material to be dried is extruded into flakes from the opening at the tip of the cylindrical casing, and at this time, due to the pressure applied, internal moisture is leached onto the surface of the flaky material to be dried. Inside the drying box, the material is quickly evaporated and dried by ventilation from a suction fan. In this way, even if the material to be dried contains a high moisture content, the moisture content can be reduced to 40 to 30% by weight or less at low cost without requiring a heat source such as hot air drying.

Therefore, the present invention aims to convert hydrous organic matter such as vegetable scraps, field grass, and wet feed, which had been thought to be impossible to store, into solid feed, to turn fibrous grasses and wheat straw into pellets, and to further reduce various types of waste. It can be used to turn materials into solid fuel, contributing to the effective use of limited resources.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional drying device, Fig. 2 is a sectional view of a drying device according to the present invention, Fig. 3 is a partially enlarged front view showing the tip of the screw shaft, and Fig. 4 is an opening of the cylindrical casing. FIGS. 5 and 6 are perspective views showing the shape of the material to be dried that is extruded from the opening of the cylindrical casing. 1... Heat molding machine, 2... Suction fan, 3... Drying box, 4... Hopper, 5... Tubular casing, 5
a... Cylindrical body, 6... Spiral blade, 7... Screw shaft,
7a... Mounting shaft, 19... Molded cylinder, 20... Spiral cutting blade, 21... Implanted cutting blade, 22... Groove.

Claims (1)

[Claims for Utility Model Registration] (1) A drying device comprising a heating molding machine in which a screw shaft having spiral blades on the outer periphery is inserted into a cylindrical casing, and a drying box having a suction fan; The tip of the screw shaft is enlarged in diameter to narrow the gap with the inner wall of the cylindrical casing, and a helical cutting edge is formed on the outer periphery of the tip of the screw shaft in the same direction as the helical blade. A drying device for hydrated organic matter, characterized in that: (2) Utility model registration Claim (1) is characterized in that a plurality of implanted cutting edges are formed in parallel to the axial direction on the inner wall of the cylindrical casing facing the outer periphery of the tip of the screw shaft. Equipment for drying hydrated organic matter.