JPS5921855Y2 - Dehydration pretreatment equipment for fermentation treatment of food waste - Google Patents

Description

[Detailed explanation of the idea] The moisture content of household high-moisture waste, that is, kitchen waste, increases and decreases depending on seasonal changes, but on average it is 76 to 76%.
It has a high moisture content of about 78%.

In order to carry out fermentation treatment, the water content must be reduced to 68% or less, but conventional dehydration pre-treatment equipment could only dehydrate to about 71-73% at most.

Therefore, during the fermentation process, natural dehydration had to be performed within the fermenter.

In addition, after dehydration, it is passed through a coarse sieve and then fermented, but if the dehydration is insufficient as described above, the perforated drum of the coarse sieve will become severely clogged, and the drum should be cleaned accordingly. This increased the frequency of the fermentation process, which hindered the improvement of processing efficiency, and also hindered the continuous continuous processing of the fermentation process as a whole.

The present invention can overcome these drawbacks.

This will be explained with reference to the diagram.

Reference numeral 1 denotes a rotary cylinder, which is installed so as to have a downward slope from an inlet 10 for garbage to an outlet 11 thereof.

A part of its inner surface is lined with a curved perforated plate 2.

The curved perforated plate 2 has a diameter of 90 to 27 mm in the circumferential direction of the rotating body 1.
It is lined so that it has an appropriate gap/gap 9 over the 0° range.

3' is its support plate.

The support plate 3' also serves to reinforce the perforated plate 2.

Reference numeral 4 denotes scraping plates arranged in parallel in the axial direction on the unlined part of the perforated plate 2 on the inner surface of the rotary drum 1, and this is divided into a plurality of pieces by a partition plate 3 provided along the circumferential direction. The garbage inside the rotary drum 1 is controlled to freely flow toward the discharge port 11 side during the rotation operation.

A sewage discharge hole 5 is located on the side of the perforated plate 2 which is lined with the lining and is bored in the rotary drum 1, and a sewage receiving pipe 6 is provided on the outer surface of the perforated plate 2 on the outer periphery thereof.

A sewage outlet 6' of a pipe 6 opens into a sewage tank 7.

8 indicates food waste. The size of the rotary cylinder 1 is generally about 3 mφ x 12 mL, and the number of rotations is 2r, p, m.
The perforated plate 2 is a stainless steel thin plate of 2 m, m
, something of the order of magnitude is good.

This is because when a small hole of 2 to 8 m, φ is opened using the same thick plate as the rotary cylinder, for example, 16 m, the sewage inside the small hole is difficult to flow out due to the surface tension of the sewage, and the fine particles between the sewage are difficult to flow out. This is because the small holes become easily clogged.

I will describe its effects.

When food waste 8 is thrown into the rotary cylinder 1 through the input port 10, it is scraped up from the bottom by the scraping plate 4 inside the cylinder, carried to the vicinity of the top, and falls onto the perforated plate 2 inside the cylinder. While repeating the movement of being carried upward again, it advances toward the discharge port 11.

The way it advances is restricted by the partition plate 3, so that the effect of the above-mentioned raking up and falling crosstalk is sufficiently performed.

Sewage generated by the falling edge of the garbage 8 that has fallen onto the perforated plate 2 or its cross-conductor passes through the perforated plate 2 and enters the gap 9 due to the effect of the centrifugal force caused by the rotation of the rotary drum 1 and its own weight, and is rotated. The sewage is discharged to the outside of the sewage tank from the sewage discharge hole 5 of the sewage tank 1, and the sewage receiver flows down through the pipe 6 into the sewage tank 7.

In addition, when stopping the rotating drum 1 at the end of a working day, etc., natural dehydration can be achieved by stopping the rotary drum 1 with the perforated plate 2 facing downward.

In the present invention, food waste is scraped upward by a scraping plate in the rotary drum, and falls onto a perforated plate.
Coupled with the presence of a gap between the perforated plate and the rotating barrel, the centrifugal force caused by the rotation of the falling blade and the rotating barrel and its own weight often promotes dewatering during rotation, and this water is gradually transferred to the downstream side. Since this process is repeated repeatedly, the dehydration effect is extremely good.

The dehydrated liquid always flows along the wall surface of the rotating barrel outside the perforated plate due to the centrifugal force caused by the rotation of the rotating barrel and is drained.

In addition, food waste sequentially advances from the input port to the discharge port due to the downward slope of the rotary cylinder, and the way it advances is restricted by the partition plate of the raking board. This function can be fully performed.

Therefore, even if food waste has a high moisture content of 76-78%,
Since it is possible to sufficiently dehydrate in one operation to reduce the moisture content to 68% or less required for fermentation processing, the fermentation processing period can be greatly shortened, and since the dehydration is sufficient, There is no clogging of the rough sieve machine, which is a process after dehydration treatment, and there is no need to stop the equipment to eliminate this, and the continuous continuous operation of the entire fermentation processing equipment can be made more efficient, resulting in a uniform product. and mass production becomes possible.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional side view of this device, and Figure 2 is A-A in Figure 1.
It is a line cross-sectional side view. 1... Rotating cylinder, 2... Perforated plate, 3...
...Partition board, 4...Scraping board, 5...
- Sewage discharge hole, 9... Gap.

Claims (1)

[Scope of utility model registration request] A perforated plate 2 curved with a small gap 9 is lined in a part of the inner surface of the rotary drum 1, which is provided so as to be inclined downward from the input port 10 toward the discharge port 11. Scraping plates 4 are arranged in parallel in the axial direction on the inner surface of the trunk without lining of 2, and this is divided into a plurality of pieces by a partition plate 3 provided along the circumferential direction. A dehydration pretreatment device for fermentation processing of food waste, which has a sewage vent hole 5 on the side with the lining.