JPS5841900B2 - Foreign matter separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for separating important foreign objects such as spoons and hawks contained in kitchen waste.

Conventionally, when kitchen waste generated from a cafeteria or the like is dehydrated and disposed of, for example, the kitchen waste is once crushed by a disposer, then dehydrated by a dehydrator, solidified, and disposed of.

In such cases, the kitchen waste contains relatively important foreign objects such as spoons and hawks, although these are rare, and it is necessary to separate these foreign objects.

As the separation device, for example, a gravity type, an adsorption type using a magnet, etc. have been proposed, but good separation effects have not been obtained.

This invention has been made in view of the above-mentioned circumstances, and examples will be described in detail below.

1... It is a tank formed in a downward depression, and the upper surface is open as an input port 1a for kitchen waste and the like.

1b is the bottom of the tank 1.

D is a drain pipe connected to the bottom part 1b.

S is a screen that is removably attached to the bottom portion 1b.

2...It is installed along the inner wall of tank 1, and the lower end is attached to the tank 1.
There is a screw conveyor device whose upper end is located near the bottom 1b of the tank 1.

2a is its screw.

2b is an electric motor for driving the screw 2a, and can drive the screw 2a via a known transmission mechanism 2c.

3...A casing that surrounds the outer periphery of the screw 2a and has an opening 3a in one side wall and the upper wall of the lower end.

3b is a lower wall opening at the upper end of the casing 3.

4...A guide plate installed in the axial direction of the casing 3 between the lower end of the opening 3a of the casing 3 and the inner wall of the tank 1.

5... Supported in the tank 1, opening 3a of the casing 3
It is a baffle board that covers the top.

The baffle plate 5 of this embodiment is attached 7 to the upper end of a vertical plate 6 erected on the inner wall of the tank 1, and is configured to open and close the upper part of the opening 3a of the casing 3.

8...A water injection nozzle installed near the hopper 12a (described later) in the tank 1 and on the side opposite to the opening 3a of the casing 3, with its tip directed toward the bottom 1b of the tank 1. The example includes an aeration function and is configured as a so-called ejector.

Note that the amount of water sprayed from the nozzle 8 is set to be smaller than the amount of food such as kitchen waste transported by the conveyor device 2.

9...A water injection nozzle installed in the vicinity of the hopper 12a (described later) in the tank 1 and on one side wall of the casing 3 with the opening 3a, with the tip directed toward the bottom 1b of the tank 1, and like nozzle 8, it can also be used as an ejector. The amount of water jetted is also set to be approximately the same as the amount of water jetted from the nozzle 8.

10.11...These are water injection nozzles that are attached to the upper part of the tank 1 and have their tips directed toward the upper surface of the baffle plate 5 when the baffle plate 5 closes the upper part of the opening 3a.

12 is a known disposer disposed below the opening 3b of the casing 3, and 12a is its hopper.

Note that the upper surface of the hopper 12a is located below the upper surface of the tank 1 and communicates with the tank 1.

13... A known centrifugal dehydrator connected 14 to the discharge side of the disposer 12.

Further, the operation of this embodiment will be explained.

First, the baffle plate 5 is placed so as to cover the upper part of the opening 3a as shown by the solid line in FIG.

Then, kitchen waste etc. are put into the tank 1 from the input port 1a.
At this time, the baffle plate 5 prevents kitchen waste from directly entering the opening 3a.

That is, even if foreign objects such as spoon horns are included in the kitchen waste, these foreign objects will not enter the opening 3a.

Water is then jetted from all the nozzles 8 to 11 until the water surface in the tank 1 reaches near the top surface of the hopper 12a.

During this time, water is injected with air mixed in from the nozzles 8 and 9, so the ejector effect reduces the attenuation of the flow velocity, and the floating blades of the air also hoist up relatively important kitchen waste, ensuring sufficient kitchen waste. is stirred.

If the thrown-in kitchen waste contains more serious foreign objects such as spoons and horns, the foreign objects are not affected by the stirring and settle on the bottom 1b, where they are separated from the kitchen waste.

When the water level in the tank 1 rises to near the upper surface of the hopper 12a due to the water jetting, the water jetting from the nozzle 8 remains as it is, and the water jetting from the other nozzles 9 to 11 is stopped.

At the same time, electric motor 2b, disposer 12, centrifugal dehydrator 13
are driven, the screw 2a rotates, and the kitchen waste mixed with water enters through the opening 3a by the conveyor device 2, is conveyed upward, and is discharged from the opening 3b.

At this time, the nozzle 8 is placed on the opposite side to the one side wall where the opening 3a is made, and the tip is directed toward the bottom 1b, so that in FIG. 3 and quickly enters the casing 3 through the opening 3a.

Moreover, when the kitchen waste enters from the opening 3a, the guide plate 4
However, since it is installed in the axial direction of the casing 3 between the lower end of the opening 3a and the inner wall of the tank 1, kitchen waste will not accumulate between the casing 3 and the inner wall of the tank 1.

In addition, since the amount of water sprayed from the nozzle 8 is smaller than the amount of food waste transported by the conveyor device, the water level in the tank 1 gradually decreases, but at this time, the food waste, which has a particularly low specific gravity, is placed above the water surface and Tank 1 on the right side in Fig. 2 of casing 3
Adheres to the inner wall.

Then, by intermittently spraying water from the nozzle 9, the adhering kitchen waste is washed away, stirred, and finally enters the opening 3b.

Even if the water level in the tank 1 gradually rises due to a failure of the conveyor device 2, etc., kitchen waste will not overflow from the tank 1 because the hopper 12a is in communication with the tank 1.

The kitchen waste discharged from the opening 3b is transferred to the hopper 12a.
and enters the disposer 12.

Then, the kitchen waste is crushed by the disposer 12, fed under pressure to the centrifugal dehydrator 13, dehydrated by the dehydrator 13, and discharged to the outside.

When there is almost no kitchen waste in the tank 1, water is injected from the nozzle 8, intermittent water is injected from the nozzle 9, and the electric motor 2b
, disposer 12, and centrifugal dehydrator 13 are all stopped.

After opening the drain D, water is jetted from the nozzles 8 to 11 to wash away a small amount of kitchen waste adhering to the inner wall of the tank 1 and the baffle plate 5, and the screen S at the bottom 1b stops the collection.

Some of the kitchen waste and foreign matter accumulated on the screen S can be removed from the tank 1 and taken out to the outside.

Also, by rotating the baffle plate 5 as shown by the two-dot chain line in FIG.
Cleaning inside is completed.

The above description is an example, and it goes without saying that the technical scope of the present invention also includes replacement of each component with an equivalent.

As described above, this invention is designed to agitate the kitchen waste in the tank 1 by water jet from the nozzle 8. Therefore, when stirring is performed by mechanical means such as an impeller, foreign matter may not be able to interfere with the impeller, etc. There are no problems such as damage or lint wrapping around the impeller, and it is also excellent in terms of safety.

In addition, since the relatively important kitchen waste is also stirred up and thoroughly stirred by the water jet, only the relatively important foreign matter settles on the bottom 1b of the tank 1, and can be reliably separated from other kitchen waste.

Furthermore, since the baffle plate 5 covers the upper part of the opening 3a, when putting kitchen waste into the tank 1, the kitchen waste does not directly enter the opening 3a, and if the kitchen waste contains foreign matter. Even if the foreign matter is removed, the foreign matter will not enter the opening 3a.

Furthermore, since the nozzle 8 is arranged on the opposite side of the side wall of the casing 3 which has the opening 3a, and its tip is directed toward the bottom 1b, the kitchen waste in the tank 1 is removed from the casing 3 by water jet from the nozzle 8. It is pushed to one side wall side with opening 3a,
It quickly enters the opening 3a.

Therefore, only kitchen waste from which foreign matter has been removed is transferred to the conveyor device 2.
Therefore, when kitchen waste is to be subjected to post-processing such as being crushed in the disposer 12 or dehydrated in the dehydrator 13, the processing becomes very easy.

[Brief explanation of the drawing]

Each of the drawings shows an embodiment of the present invention; FIG. 1 is a side view of the main part taken longitudinally, and FIG. 2 is a cross-sectional view taken along the line -■ in FIG. 1. In the figure, 1...tank, 1a...inlet, 1b...
・Bottom, 2...Screw conveyor device, 2a...
Screw, 3...Casing, 3a...Lower end opening, 5...Baffle plate, 8...Water injection nozzle.

Claims (1)

[Scope of Claims] 1. A tank with an input port on the top surface and a depression at the bottom, and a tank installed along the inner wall of the tank, with the lower end located near the bottom of the tank and the upper end located at the upper end of the tank. a screw conveyor device, a casing surrounding the outer periphery of the screw of the screw conveyor device and opening one side wall and a soil wall at the lower end thereof, and a baffle plate supported in the tank and covering the upper part of the opening; A foreign matter separation device, comprising: a water injection nozzle installed in the tank and on the opposite side of the casing from the open side wall, and with a tip directed toward the bottom of the tank. 2. The foreign matter separating device according to claim 1, wherein the baffle plate is connected to the inner wall of the tank and is capable of opening and closing an upper part of the opening of the casing.