JPH04356684A - Rotary type drying apparatus for garbage - Google Patents

Abstract

PURPOSE:To provide a title apparatus capable of effective drying of raw refuse, etc., including much water. CONSTITUTION:In a drying apparatus for feeding heating gas to a lateral rotary cylinder body 1 having predetermined diameter and length, rf waveguides 7, 8 from magnetrons 5, 6 installed externally are disposed in the body 1 and many scribing blades 9 are formed on the internal peripheral surface of the body 1. The angle 9a of the scribing blade 9 and a welding bead 9b are rounded, respectively. Since there can rapidly and safely be performed a drying processing for articles such as garbage including mach water, the apparatus is widely useable not only for drying garbage but also for sterilization of soil of turf soil in golf links, high-class vegetables, high-class flowers, and the like.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type garbage drying apparatus that can efficiently dry garbage containing a large amount of water.

0002

[Prior Art] In recent years, the amount of garbage, etc. discharged has increased dramatically, and this has been dealt with by using commercial incinerators that can process it completely pollution-free. In the case of raw garbage, it is difficult to completely incinerate it unless you have a two-stage treatment facility that performs drying and then incineration.

However, the current situation is that it is extremely difficult for hotels, restaurants, snack food restaurants, vegetable markets, fish markets, etc. to individually purchase expensive, high-performance equipment with two-stage processing equipment as described above, so collection is unavoidable. Currently, businesses collect waste and transport it to appropriate municipal incinerators or intermediate treatment plants, and at one time incinerators combined with rotary kiln drying furnaces or fluidized bed incinerators were touted.
This had many advantages and disadvantages and was not sufficient.

[0004] Taking drying okara as an example, if you use a drying oven that incorporates a far-infrared ray radiation method, if you use an agitator, only the surface will turn a fox-colored color and burn, but the heat will not penetrate inside. Instead, it clumps together like a rice cake.

[0005] Most of the food waste discharged from recent first-class hotels is processed by a pulper device, and the waste is crushed to a size that is slightly coarser than ``bean curd''. Furthermore, hotels and restaurants have an extremely large amount of leftover food, macaroni, and spaghetti, and when these items are stirred, they become completely cake-like.

[0006] Even in a rotary drying oven, the granulation action acts as it rotates, resulting in the formation of many "dumpling"-like products, and in both cases, heat penetration is poor.

[0007] However, if these materials are subjected to high frequency even after they have been made into a "dumpling" shape, or even before that, the granulation is broken all at once. This is because the high frequency waves penetrate into the inside of the ``dango'' and cause the moisture inside to eject to the outside in the form of steam.

However, as shown in FIG. 4, in a microwave oven with a turntable in which a heat-resistant glass rotary plate 13 is rotated by a rotary shaft 11 and rotated on a roller 12, the heat-resistant glass rotary plate 13 is When a metal can 14 with an open top is placed on a plate 13 and a certain thickness of "okara" (a) is placed inside and heated, "okara" (okara) remains moist at the bottom of the can 14 for a long time. kara” remains. That is, the high-frequency electric field strength around and at the bottom of the can 14 is zero, and no drying action occurs at all. Here, if the turntable is stopped from time to time (that is, the high frequency radiation is temporarily stopped) and the "okara" (a) is stirred several times, smooth drying can be achieved overall.

[0009] Even though high frequencies have the above effects,
If metal is present in the material to be dried, local discharge will occur,
In practice, it is rarely used because it may cause flames in some cases. Moreover, the interior of the rotary kiln is entirely made of metal, so welding beads,
There is an extremely high possibility of electrical discharge occurring in the threads of the bolts, the plate material of the stirring blades, etc., so even though the belt conveyor system is currently used, the conveyor belt must be made of at least an expensive insulating material such as Teflon. .

0010

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a rotary drying apparatus for drying food waste, etc., which uses a rotary kiln type drying furnace and uses high frequency waves that do not cause local discharge.

[0011]

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned viewpoints, and provides a drying device for supplying heated gas to a horizontal rotary cylinder main body having a required diameter and length. A high-frequency waveguide is installed inside the main body from a magnetron installed outside, and a large number of scrapers are planted on the inner peripheral surface of the main body, and the corners of the scrapers and weld beads are rounded. The aim is to provide a rotary type drying device for garbage, etc.

0012

[Operations and Embodiments] Hereinafter, the structure of an embodiment of the present invention will be explained together with its operation with reference to the drawings. First, the configuration of the rotary garbage drying device will be explained. FIG. 1 is a schematic cross-sectional view in which a horizontal rotary cylinder main body 1 having a required diameter and length is formed, and hoods 2a and 2b that cover the outside are integrally provided on the inlet and outlet sides of the main body 1. A heated gas inlet duct 3 is attached to the inlet side hood 2a, and a heated gas outlet duct 4 is attached to the outlet side hood 2b. On the outlet side of the main body 1, high frequency waveguides 7 and 8 are arranged which extend from magnetrons 5 and 6 installed outside the hood 2b to the center side of the main body 1 through the hood 2b. A large number of scraping blades 9 are installed on the inner peripheral surface of the main body 1 at required intervals along the spiral direction. As shown in FIG. 2, the blades 9 have rounded corners 9a, weld beads 9b are completely sanded and rounded, and weld spatter is completely removed. The joint between the main body 1 and the hoods 2a and 2b is sealed with a sliding air seal 10. The main body 1 is rotatably mounted on a roller 11, as shown in an enlarged view of the main part in FIG. A driving deceleration motor 13 is provided which meshes with and drives the main body 12a, and the main body 1 is configured to be rotated at a required speed by driving the deceleration motor 13. A screw feeder 14 for feeding materials to be dried is provided externally from the central entrance side of the main body 1, and is rotated by a drive motor 14a. A drying material storage hopper 16 with a damper 15 is provided above the end of the screw feeder 14 for feeding the material to be dried. Punching plates 17a and 17 for high frequency reflection are provided at required positions on the entrance side and the exit side of the main body 1, respectively, to prevent high frequency leakage to the outside.
b is provided. A screw conveyor 19 for sending out dry matter having a damper 18 for sending out dry matter as a canopy is provided below the outlet of the main body 1, and is rotated by driving a drive motor 19a.

Next, the operation will be explained. The power is turned on before using the rotary garbage drying device. The materials A to be dried, such as food waste containing a large amount of moisture, transported to the workplace are stored in the materials storage hopper 16, and are dumped in appropriate amounts by the damper 15 into the screw feeder 14 for feeding the materials to be dried, which is driven by the drive motor 14a. is fed into the main body 1 by the drive of. The main body 1 includes a roller 11
A chain 1 is rotatably mounted on the top and is stretched around a driving chain gear 12 attached along the outer circumference of the chain 1.
A drive reduction motor 13 that meshes with and drives 2a.
The main body 1 is rotated at a required speed by the drive of the main body 1 .

The material to be dried A fed into the main body 1 is
The material to be dried A is heated and dried by the heated gas fed into the internal space of the main body 1 from the heated gas inlet duct 3 through the hood 2a while being slowly stirred inside.
is placed on a large number of scrapers 9 installed along the spiral direction of the inner circumferential surface of the main body 1, and as it is pulled up from the lower position to the upper position, it falls from the upper part, and the scraper blades 9 The whole thing falls before it reaches the zenith position. That is, the material to be dried A is stirred by the scraper blades 9. During this process, the material to be dried A is entirely exposed to the heated gas, and drying progresses from the outside.

At the same time, high frequency waves generated by the magnetrons 5 and 6 are irradiated between the irradiation ports of the high frequency waveguides 7 and 8 extending toward the center of the main body 1 and the scraper blades 9. When the main body 1 is stationary, the high-frequency electric field strength is zero or very weak near the area where the material to be dried A contacts the metal cylinder inner wall and the scraper blades 9, but by rotating the main body 1, the high frequency electric field strength is very weak. The high-frequency electric field strength acts uniformly on the dried material A that has been scraped and stirred by 9, and the molecules inside are excited and heated to a high temperature, so that drying progresses from the inside as well. In this case, the corners 9a of the scraper blade 9 are rounded and the weld bead 9b is completely sanded and rounded, so that no local discharge occurs and safety is ensured.

The material to be dried A, which has been heated from both the inside and outside to ensure drying, is dropped from the outlet of the main body 1 in appropriate amounts by the damper 18 for sending out the dry material onto the screw conveyor 19 for sending out the dry material, and is driven. motor 1
It is transported to the outside by the drive of 9a.

The heated gas sent to the main body 1 is sucked out together with the vapor evaporated from the material A to be dried through the heated gas outlet duct 4 by a suction blower or the like.

The heated gas sucked outside is dehumidified and returned to the heated gas inlet duct 3 side for reuse, thereby making it possible to efficiently utilize thermal energy.

[0019]

Effects of the Invention As is clear from the above explanation, the present invention is capable of rapidly and safely drying food waste with a high moisture content, and is therefore useful not only for drying food waste but also for golf course lawns. It can be widely used for sterilizing the soil of high-quality vegetables, high-grade flowers, plants, etc., and for other purposes.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing the structure of a scraper blade according to an embodiment of the present invention.

FIG. 3 is a perspective view of essential parts showing the internal configuration of the main body according to an embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a microwave oven showing high frequency characteristics.

[Explanation of symbols]

1　Horizontal rotating tube body 5, 6 Magnetron 7, 8 High frequency waveguide 9. Scraping feathers 9a Corner of scraper blade 9 9b Welding bead

Claims (1)

[Claims] 1. A drying device for supplying heated gas to a horizontal rotating cylinder main body 1 having a required diameter and length, in which a high-frequency waveguide 7 is connected inside the main body 1 from magnetrons 5 and 6 installed outside. . Drying device for garbage, etc.