JPH1085712A - Vacuum carrying and drying device for garbage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum carrying and drying device for garbage combining the carrying and drying operation of gargage rationally. SOLUTION: Discharge outlets of crushers 1 for turning garbage into slurry are connected with piping 4, and the lower end of the piping is connected with a vacuum drier 6 with a drier inlet valve 5. Garbage slurry discharged out of the crushers 1 by the negative pressure of the vacuum drier 6 is sucked into the vacuum drier 6 and carried. The water content in the vaccum drier 6 is evaporated under the pressure reduced by a compressor 7 to dry the garbage in the vacuum drier 6. Preferably a plurality of crushers 1 with crusher outlet valves 3 on their discharge outlets are connected with the upstream side of the drier inlet valve 5 of the piping 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum conveying and drying apparatus for garbage, and more particularly to a conveying and drying apparatus for conveying and drying slurry-like garbage by vacuum. Vacuum conveying and drying apparatus for garbage according to the present invention, especially garbage processing in restaurants and the like of shopping centers, garbage processing of each house in apartment houses, intensive processing of garbage in food service centers and the like, intensive processing of garbage in food factories, Suitable for transporting and drying sludge, transporting and drying human waste.

[0002]

2. Description of the Related Art With the progress of urbanization, disposal of garbage such as kitchen garbage has become a problem. Since garbage is unsanitary and is not favored for manual handling and disposal, and garbage is easily rotted, it is necessary to store it in a refrigerator at a low temperature for storage for more than one day. Actually, problems such as odor due to putrefactive sewage and contamination of surroundings occur during transportation, and a large amount of moisture is required during incineration treatment, so that a large amount of an auxiliary material such as petroleum is required.

[0003] In the United States and other countries equipped with a sewage system, a disposer (garbage crusher) is installed in a home kitchen, and garbage is crushed and discharged into sewage for treatment. The use of disposers is banned in Japan, because the burden of sewage treatment is expected to increase significantly. However, in a building equipped with a wastewater treatment facility, garbage crushers and pipe transportation may be used in Japan as shown in Figs. 3 and 4.

FIG. 3 (A) shows a natural flow type in which the effluent from the disposer 30 and the sink 31 is caused to flow down to a solid-liquid separator 32 through a vertical pipe, and the solid-liquid separator 32 removes miscellaneous wastewater. Separate into solid kitchen waste. FIG. 3 (B) shows a pump pressure feeding system in which the effluent from the disposer 30 is sent to a solid-liquid separator 32 via a pipe by a crushing / pressure feeding device 33 to be separated into water and solid matter. FIG. 3 (C) shows a pump-feeding circulation type in which the effluent from the disposer 30 is sent to a water press 35 via a pipe by a pump 34 to separate solid kitchen garbage, and all or part of the gray water is discharged. Instead of or in addition to the water in the makeup water tank 36, the water is returned to the disposer 30 by the pump P and used for circulation. FIG. 4A shows a vacuum transfer type, in which garbage put into the inlet 41 is supplied by a vacuum pump 39.
With the operation, the gas flows down in the pipe and passes through the gas-liquid separator 38. Here, the gas is discharged by the vacuum pump 39, and the remaining liquid is sent to the solid-liquid separator 32, where it is separated into water and solids. In the system shown in FIG. 4B, a small storage tank 29 is provided in each disposer 30, and the effluent from the disposer 30 is stored here for a short time. The vacuum is constantly maintained in the piping by a vacuum pump 39, and the kitchen waste is separated by a gas-liquid separation device 38 by opening an on-off valve 40.
Transfer to

[0005]

However, FIG. 3 and FIG.
In this method, garbage is conveyed to the center for solid-liquid separation, but solid kitchen waste after solid-liquid separation is still garbage and easily rots. Drained wastewater also contains rich organic matter and requires sufficient wastewater treatment. In other words, the conventional garbage pipe transport system merely provides pipe transport, and hardly solves the problems of decay of the garbage itself and wastewater treatment of water for slurrying.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vacuum transporting and drying apparatus for garbage in which garbage is transported and dried in a reasonable combination.

[0007]

In the embodiment shown in FIG.
The garbage vacuum transport drying apparatus of the present invention comprises a crusher 1 for making garbage slurry, and a vacuum dryer 6 with a dryer inlet valve 5 communicating with a discharge port of the crusher 1 through a pipe 4. Things. Preferably, the plurality of pulverizers 1 provided with the pulverizer valves 3 at the discharge ports are connected to the pipe 4 on the upstream side of the dryer inlet valve 5.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of FIG. 1, a crusher 1 mixes and crushes garbage with water from a faucet (not shown) and discharges the garbage as a garbage slurry. The vacuum dryer 6 generates a vacuum pressure, applies the vacuum to the pipe 4 when the dryer inlet valve 5 is open, and causes the garbage slurry pulverized by the pulverizer 1 to pass through the pipe 4 by a pressure difference. By sucking into the vacuum dryer 6, garbage is transported from the crusher 1 to the vacuum dryer 6. Here, the dryer inlet valve 5 is closed and the vacuum dryer 6
If the vacuum is maintained, the water evaporates and only the solid matter of the garbage remains as dry garbage. In the illustrated example, the dried waste is extracted from the dried waste outlet 14. In this way, the garbage is dried, and the weight is significantly reduced.

In the embodiment of FIG. 1, the air in the vacuum dryer 6 and the vapor evaporated in a vacuum are extracted and compressed by a compressor 7, and the high-temperature steam is condensed by a condenser 8 and Pulled out. Dried garbage is light in weight and easy to handle, and can be widely used for recycling as compost material, fuel (RDF), and the like. The water extracted from the vacuum dryer 6 is distilled water, and does not require wastewater treatment in principle, and can be reused.

[0010] Accordingly, the object of the present invention is to provide a "garbage vacuum transfer and drying apparatus which rationally combines garbage transport and drying treatment".

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a plurality of pulverizers 1 provided with a pulverizer valve 3 at a discharge port are provided, for example, in a plurality of kitchens. Further, a short-term storage container 2 is provided between each crusher 1 and the crusher valve 3. The vacuum dryer 6 is provided as a centralized processing device at a specific place in a building, for example, a waste treatment room.

Each crusher 1 is connected to a vacuum dryer 6 by a pipe 4. The pipe 4 is a steel pipe, a copper pipe, a PVC pipe, or the like, and a dryer inlet valve 5 is provided at an end on the vacuum dryer 6 side.
At both ends of the pipe 4 at the portion where the plurality of crushers 1 of the illustrated example communicate laterally, air suction ports for pipe cleaning are provided, and silencers 11 are attached via opening / closing valves 10 respectively. The operation of this embodiment of the vacuum transfer and drying apparatus for garbage will be described separately for a transfer operation and a drying operation.

[Transportation Operation] The garbage is pulverized by a pulverizer 1 and simultaneously mixed with water to form a slurry, which is stored in a short-term storage container 2. On the other hand, the vacuum dryer 6 includes a vacuum vessel 6a and a compressor 7 or a vacuum pump 16 connected thereto.
(FIG. 2), the vacuum vessel 6a is always kept at a negative pressure of, for example, about 0.5 atm by the compressor 7 or the vacuum pump 16, and the dryer inlet valve 5 is kept open.

If a crusher valve 3 is opened when a predetermined amount of garbage slurry is stored in the short-term storage container 2, the garbage slurry is sucked into the vacuum dryer 6 by a pressure difference and transported, and is stored therein. Is done. For automation, a garbage slurry amount detecting means (not shown) such as a water level sensor is provided in the short-term storage container 2, and the crusher valve 3 is used as an electric valve and the crusher valve is output by the slurry amount detecting means. 3 may be automatically opened.

[Drying operation] In the vacuum dryer 6 after storing the garbage slurry, the compressor 7 is operated after preheating by, for example, an electric heater (not shown) or the like, and the moisture is vacuum evaporated (for example, 90 ° C, 70 kPa). ). However, the preheating method is not the main object of the present invention. The generated steam is compressed by the compressor 7 and condensed by the condenser 8 provided on the outer periphery of the vacuum vessel 6a (for example, 110 ° C., 140 kPa). The waste in the vacuum vessel is heated by the latent heat of condensation at this time. The hot water after the condensation is discharged from the steam trap 9. At this time, the dryer inlet valve 5 is closed.

The vacuum dryer 6 of the embodiment shown in FIG.
And a stirrer composed of rotating blades 13 driven by the garbage to promote the evaporation of water from the garbage slurry. By performing the drying operation at night, the transport operation and the drying operation can be prevented from overlapping. However, it is possible to perform the transport operation even during the drying operation. Since the air sucked in with the garbage does not condense in the condenser 8, the air is exhausted by providing a bleed valve (not shown).

In a large-scale facility, a plurality of vacuum dryers 6 are provided, and a switching valve (not shown) is provided at an intermediate portion of the pipe 4, so that the vacuum dryer 6 in the transport operation mode and the vacuum dryer in the drying operation mode are provided. It is also possible to operate the dryer 6 in parallel and operate simultaneously. The vacuum dryer 6 is desirably a steam recompression vacuum dryer (see Japanese Patent Application No. 7-282750) or a device with low energy consumption equivalent thereto, but is not limited thereto. For example, as shown in FIG. 2, the pressure inside the vacuum vessel 6a can be reduced by the outer vacuum pump 16 via the condenser 8. In the embodiment shown in FIG.
And the vacuum vessel 6a is heated by the boiler 22. The water condensed in the condenser 8 is transferred to the receiver tank 23
After being subjected to gas-liquid separation, it is sent to the outside by a withdrawal pump P2. The air drawn by the vacuum pump 16 is discharged to the outside via the gas-liquid separator 24. Condenser 8
A cooling device that radiates heat in the cooling tower 25 is provided to cool the cooling tower.

[0018]

As described above, the vacuum transport and drying apparatus for garbage according to the present invention has the following remarkable effects because the garbage slurry is transported and dried by the vacuum dryer. (A) The transfer and drying of garbage can be rationally and efficiently performed by a single vacuum transfer and drying apparatus for garbage. (B) Since garbage is transported by vacuum suction, the amount of transport water used may be smaller than that of natural flow or pumping. (C) Odor countermeasures are easy because of the vacuum treatment, and can be dealt with, for example, by providing a deodorizer on the discharge side of the compressor.

(D) The water extracted from the vacuum dryer is distilled water, and wastewater treatment is basically unnecessary. (E) The garbage after drying can be widely incorporated into the recycling process by composting or fueling, and is easy to handle. (F) A high energy-efficiency vacuum dryer such as a steam recompression vacuum dryer (see Japanese Patent Application No. 7-282750) can realize a socially and environmentally desirable waste treatment method. it can. (G) No solid-liquid separator is required.

(H) Since the garbage after drying is hard to perish, it is not necessary to store it in a refrigerator. (I) Waste after drying has lost moisture and is reduced in weight (1/1 before drying)
4 to 1/10), so the outsourcing costs can be saved accordingly. (V) Since the vacuum dryer has a certain volume, a pressure accumulation function can be expected. That is, even if the compressor (or the vacuum pump) is small, the vacuum suction force can be generated for a sufficiently long time. (R) In addition to so-called garbage, those that can be slurried,
For example, it can be used for transporting sludge and human waste and drying.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory view showing another embodiment.

FIG. 3 is an explanatory diagram showing a conventional natural flow and slurry feeding method of slurry transportation.

FIG. 4 is an explanatory view showing a conventional vacuum system for slurry transportation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pulverizer 2 ... Short-term storage container 3 ... Pulverizer valve 4 ... Piping 5 ... Dryer inlet valve 6 ... Vacuum dryer 7 ... Compressor 8 ... Condenser 9 ... Steam trap 10 ... On-off valve 11 ... Muffler 12 ... Motor 13 ... Rotating blade 14 ... Dry waste outlet 16 ... Vacuum pump 22 ... Boiler 23 ... Receiver tank 24 ... Separator 25 ... Cooling tower 29 ... Small storage tank 30 ... Disposer 31 ... Sink 32 ... Solid-liquid separator 33 ... Crushing Pumping device 34 ... Pump 35 ... Water press 36 ... Replenishing water tank 38 ... Gas-liquid separator 39 ... Vacuum pump 40 ... On-off valve 41 ... Inlet.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasunori Ito 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Hideo Iwaki 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Susumu Sato 2-191-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Kashima Construction Co., Ltd.

Claims (7)

[Claims] An apparatus for vacuum conveying and drying garbage, comprising: a crusher for making garbage slurry; and a vacuum dryer with a dryer inlet valve connected to a discharge port of the crusher by piping. 2. A vacuum conveying and drying apparatus according to claim 1, wherein a plurality of said pulverizers provided at said discharge port are connected to a plurality of said pulverizers upstream of a dryer inlet valve of said pipe. Vacuum transfer drying equipment for garbage. 3. The vacuum transfer drying apparatus for garbage according to claim 2, wherein a short-term storage container is provided between said discharge port of each of said pulverizers and a pulverizer valve. 4. The vacuum transfer drying apparatus according to claim 1, wherein the vacuum dryer has a vacuum vessel connected to the dryer inlet valve, a compressor for drawing and compressing the gas in the vacuum vessel, And a vacuum transfer and drying apparatus for garbage provided with a condenser connected to a discharge port of the compressor. 5. The vacuum transfer drying apparatus according to claim 1, wherein the gas in the vacuum vessel is supplied to the vacuum dryer through a vacuum vessel connected to the dryer inlet valve and a condenser. Vacuum transfer and drying device for garbage provided with a vacuum pump to pull out. 6. The vacuum transfer drying apparatus for garbage according to claim 4, wherein said condenser is mounted on a peripheral wall of a vacuum vessel, and said vacuum vessel is heated by radiating heat from said condenser. 7. The vacuum transport drying apparatus for garbage according to claim 4, wherein a stirring means is provided inside said vacuum vessel.