JPH0924491A - Dehydrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the clogging of a filtering face provided in a cylindrical casing in a dehydrator to forcibly feed a garbage, etc., inside the casing through a feeding spiral and to separate water. SOLUTION: Several numbers of endless intervals 3a,... crossing a casing 1 in cutting in round slices are formed as a filtering face 3 inside the casing 1, and scratching chips 7a... engaged these endless clearances 3a,... are provided respectively on the feeding spiral 7 with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydrator suitable for separating and dehydrating food waste containing a large amount of water into a liquid such as a contaminant and other solid substances and a liquid.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional dehydrator used for the above-mentioned purpose has a rotary shaft 5 having a feed spiral 7'inside a right cylindrical casing 1'fixed to a base. The raw material such as raw garbage supplied from the raw material supply port 2'provided near the one end of the casing is pushed by the feed spiral 7'to the other end, The large amount of water contained therein is discharged to the outside from the filtration surface 3'in the middle of the casing, and the water-depleted contaminants are previously compressed and dehydrated by the feed helix 7'which is formed smaller toward the tip of the helix pitch. ,
A device having a structure in which it is taken out from the solid matter discharge port 4'at the other end of the casing is general.

By the way, the filtering surface 3'in the conventional dewatering device is simply formed by forming a part of the casing 1'into a fine perforated plate, a wire mesh or a fine hole surface having slit-like slits. The raw material such as raw garbage, which has been pressed and turned into a paste by the feeding spiral, is strongly pressed into the inside of the filtration surface and repeats solidification and deposition, which has the disadvantage that the filtration surface is frequently clogged and clogged. It was

[0004]

To this end, a scraper which is operated by an appropriate drive mechanism is provided on the filtering surface so that the filtering surface can be cleaned continuously or intermittently. As described above, since the filtration of the paste-like solid matter on the filtration surface is performed from the inside to the outside of the filtration surface, even if a scraper is provided on the outer surface of the casing, the cleaning effect is almost zero. Undesirably, however, it is not possible to provide it on the inner surface of the casing due to the presence of closely rotating feed helices.

[0005]

Now, considering the relationship between the outer peripheral surface of the feed helix twisted along the inner surface of the casing and the inner peripheral surface of the casing, the entire feed helix keeps an oblique state with respect to the axis of the casing. And moves toward the other end of the casing along the inner peripheral surface of the casing.In this case, the locus at any given point on the outer peripheral surface of the feed spiral is the circle obtained by cutting the casing in one plane orthogonal to the axis. It matches the lap. Focusing on this point, the present invention forms the filtration surface of the casing into several endless gaps that cross the casing in a sliced manner, and at the outer peripheral edge of the feed spiral, a scraping tip that engages with these endless gaps in advance. These scraping tips are urged to constantly clean each endless gap from the inside.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
In the side sectional view of FIG. 1, 1 is a casing,
This is installed on the base in an inclined state, and has a raw material supply port 2 near one end, which is a lower part, a permeable filter surface 3 communicating with the outside in the middle, and a solid matter discharge port 4 at the other end.

A rotary shaft 5 is mounted inside a casing 1 via bearings 6 and 6, and a series of feed spirals 7 are provided on the rotary shaft 5 to feed raw garbage introduced into a raw material supply port 2. The raw materials such as are compressed while being pushed by the feed spiral 7, most of the water content is pushed out of the casing 1 through the permeable filter surface 3, and the solid matter is further fed by the feed spiral 7. The solid material is discharged from the solid material discharge port 4. In addition, since the water content of the material to be pushed is reduced on the filtration surface 3 and the volume thereof is reduced, the helical pitch of the feeding helix is reduced in this portion, and the pressing force is increased accordingly. However, this spiral pitch can be made the same size as a whole.

Next, as is apparent from FIGS. 1 and 2, the filtering surface 3 is formed in several rows of endless gaps 3a, 3a, ... Which traverse the casing in a sliced manner, and the feed spiral 7 of this portion is formed. On the outer peripheral surface, the scraping tips 7a, 7 in the shape of a protrusion are provided at corresponding positions facing the endless spaces 3a, 3a ,.
are planted with their tips inserted into the endless spaces 3a, 3a ,.

In FIG. 1, reference numeral 8 denotes a holding rod screwed to the outer peripheral surface of the filtering surface 3 portion of the casing 1.
That is, the filtering surface 3 is formed of several rows of endless gaps 3a, 3a, ... As described above.
a, 3a, ... In the embodiment shown in the figure, several circular ring-shaped short cylinders are sequentially abutted at a predetermined gap, and then several holding rods 8, ... Are attached over these short cylinders. ,
The holding rods 8, ... Are screwed to the peripheral surface of the casing 1 to form an integral filtration surface.

[0010]

As is apparent from FIG. 2, the present invention has the above-mentioned structure, and a large amount of water and a part of raw materials such as garbage sent in the direction of the arrow in the casing 1 by the feed spiral 7 are contained. The trace substances are the endless gaps 3a forming the filtration surface 3,
3a, ... are pushed out of the casing 1, but on the other hand,
The scraping tips 7a, 7a, ... Which continuously move through the respective endless gaps 3a, 3a cannot prevent retention in the endless gaps 3a, 3a ,. Since the process is performed from the inside to the outside, the substances that cause clogging are always reliably removed, and efficient operation can be continued. The filtering surface 3 and the scraping tips 7a, 7
Since the actions of a, ... Are not restricted by the installation direction of the casing 1, the entire device can be installed horizontally, vertically, that is, horizontally or vertically.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of an apparatus of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing the relationship between a filtration surface and a scraping tip.

FIG. 3 is a side sectional view showing an example of a conventional device.

[Explanation of symbols]

 1 Casing 2 Raw Material Supply Port 3 Filtration Surface 4 Solids Discharge Port 5 Rotating Shaft 7 Feed Spiral 3a Endless Permeability 7a Scraping Tip 8 Holding Rod

Claims (1)

[Claims] 1. A cylindrical casing having a raw material supply port near one end, a filtration surface communicating with the outside in the middle, and a solid matter discharge port at the other end, wherein a rotary shaft having a feed spiral is supported. The filtration surface is formed into a plurality of rows of endless gaps that cross the casing in a plane perpendicular to the axis, and the outer periphery of the feed helix is provided with corresponding endless gaps at positions corresponding to these endless gaps. A dewatering device in which a scraping tip that engages with each is planted with its tip facing the outside of the casing.