JPS597601A - How to transport municipal waste - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transporting municipal waste that prevents waste that generates waste from mixing with other waste while being stored and transported.

The pneumatic transport method for municipal waste is as outlined in Figure 1.
Garbage storage facilities (garbage posts) (1) installed at important points such as street corners, cyclones (4) that are primary separators, bag filters (5), deodorizing equipment (6), collection drums (7)
), etc., and a transport pipe (2) that connects the waste storage facility (1) and the collection station (3). Garbage is temporarily stored in the storage section at the bottom of the storage facility, and collected at the collection station (3) according to a predetermined program.
It will be collected and transported.

Paper, plastic, glass, cans, garbage, etc. are handled in cities using the above garbage transportation method, but conventionally, among these municipal wastes, kitchen waste containing sewage has been stored in paper bags or plastic bags. Other garbage is stored and transported in bulk or in a bundle, but during transportation, the paper bag or plastic bag is torn immediately and the garbage is left inside. Currently, garbage containing sewage is broken up in transport pipes and transported to collection stations.

As a result, garbage that emits foul odors and garbage that contains sewage is transported and collected in pieces, which poses the following problems. In other words, (1) In the case of garbage that emits a foul odor, garbage that is generally discharged from homes, offices, restaurants, etc., includes paper, plastic, glass, cans, plants, wood, rubber, leather, earth and sand, fibers, kitchen waste, It is made of a variety of materials, including metals, and generates the characteristic odor of garbage. In the pneumatic transport method of waste,
Various measures have been taken to prevent this bad odor.

First, a deodorizing device (6) must be installed at the collection station (3). In other words, garbage that is transported by airflow from a garbage storage facility through a transportation pipe collides with the pipework and breaks up, and the odor it contains mixes with the air, causing the airflow to emit a strong odor. However, it is a pollution problem to release it directly into the atmosphere as exhaust from the blower outlet, and it is necessary to install deodorizing equipment such as activated carbon. Therefore, a deodorizing device (6) is generally provided on the discharge side or intake side of the blower, and this deodorizing device (6)
Because its adsorption performance has a limited lifespan, it is necessary to periodically replace the activated carbon used as a deodorizer, which increases costs.

Next, regarding garbage storage facilities (1), if garbage storage facilities are not constantly cleaned, bad odors will be generated, so regular cleaning is necessary, and in order to prevent bad odors from leaking into the outside air, Suction piping may be required, which increases equipment costs.

(n) In the case of garbage containing sewage When handling garbage containing sewage, there are problems such as corrosion of equipment, formation of a sticky layer due to the adhesion of garbage dust and sewage, and leakage of sewage.

■ Corrosion of equipment In garbage storage facilities, the garbage inlet and garbage storage area are constantly in contact with sludge and dirt, and are subject to significant corrosion. For this reason, rust-free steel is generally used for the garbage inlet, and steel plate is generally used for the garbage storage section, but they must be manufactured with allowances for corrosion corresponding to their service life.

Pipeline facilities such as transport pipes and switching valves are constantly in contact with garbage,
In addition, it is necessary to take into account wear due to friction with the transported object due to high-speed airflow and corrosion due to dirt and grime.

The collection station (3) includes a cyclone (4) that separates dust from the airflow, a bag filter (5) that separates dust from the airflow, and a storage tank or container container that stores the separated garbage. However, since the inside of these devices is constantly in contact with sludge and dirt, corrosion costs must be taken into consideration.

■ Formation of a fixed layer due to adhesion of garbage dust and sewage A fixed layer of dust is generated on everything from garbage posts, transport pipes, and collection station equipment, and maintenance to eliminate this requires considerable effort and expense.

■ Leakage of sewage For example, in the case of a so-called discharge valve type waste storage facility where the waste storage area and the transport pipe are separated by a discharge valve, the sewage from the waste stored above the discharge valve leaks from the discharge valve. The sewage is discharged into the pit that houses the storage facility, and a foul odor builds up, not only inside the bit, but also around the input port, so measures are taken to prevent sewage from leaking from the standpoint of sanitary and environmental conservation. I have to teach.

As mentioned above, when handling municipal waste,
This has led to various problems, and in severe cold weather, there is also the problem of freezing of garbage and increased resistance of transportation pipes. That is, freezing of garbage occurs when the garbage stored in the stagnation storage section of the garbage storage facility (1) contains moisture. When waste freezes in the waste storage area, the waste is transferred to the transport pipe (2).
There is a risk that the garbage may not fall into the container, making it impossible to transport the garbage. Therefore, it is necessary to take measures such as heating the inside of the bit that houses the waste storage facility to prevent the waste from freezing, or directly heating the waste storage part to keep it warm. Also, when it is extremely cold, for example, when the temperature is around -20°C,
The transport pipe (2) that connects the waste storage facility (1) and the collection station (3) is buried at a certain depth and is kept at a high temperature above the atmosphere. When the intake valve at the end is opened and air is introduced into the transport pipe,
-20°C cold air passes through the transport pipe, and the cold air is gradually cooled from the intake valve side by ventilation, and the temperature of the transport pipe decreases from -20°C to t''C towards the collection station. It is cooled with a temperature gradient. t' (3 may be negative depending on the length of the equipment pipe and transportation time,
It can also be positive. Therefore, part, most or all of the transport pipe will be cooled to 120° to -0°C. Therefore, when moisture-containing dust hits the cooled inner surface of the pipe, it immediately adheres to the inner wall of the pipe and freezes. Due to this adhesion, an uneven surface is formed on the wall surface of the pipe throughout the pipe, and the frictional resistance of the pipe due to the air flow increases. Therefore, the power consumption of the blower also increases, resulting in an increase in energy consumption.

The present invention aims to solve the various problems mentioned above, and in particular, it aims to eliminate the various problems in the case of garbage that emits a foul odor or garbage that contains sewage.

The method of the present invention will be explained below.

The method of the present invention basically involves distinguishing in advance garbage that generates a foul odor or garbage that contains sewage from other garbage, and storing or transporting the separated garbage together, so that it does not get mixed up on the way. It is important to avoid this.

To explain in detail, the garbage generated on a daily basis from homes, offices, restaurants, etc. includes paper, plastic, glass, cans, plants, wood, rubber, earth and sand, fibers, kitchen waste, etc. Some are accompanied by foul odors and water (sewage). Garbage that emits bad odors and garbage that contains sewage are associated with many problems as described above, so only these garbage should be placed in containers such as bags or boxes, and other garbage, such as foul odors and dirt, should be placed in a container such as a bag or box. It should be separated from garbage that does not contain liquid and transported together with it.

Fig. 2 shows the state of transporting waste according to the present invention, including a waste storage facility (1) (see Fig. 1) and a collection station (see Fig. 1).
Waste packed in containers (8) and other loose waste (9) are transported through the transport pipe (2) that connects the collection station (3) to the collection station (3).
) to prevent the containers (8) from being damaged and the contents mixed with other loose garbage (9) on the way, and transporting the garbage packed into the containers (8) at the collection station (3). and other loose waste (9) are collected separately,
Try to eliminate problems caused by odors and sewage.

In the method of the present invention, out of the garbage that comes on a daily basis, garbage that emits a bad odor and garbage that contains sewage are placed in a container (8) in advance.
The garbage thus separated is then put into a garbage storage facility (1) and stored there, and collected at each garbage storage facility (1) according to a prescribed program. Station (3) When transporting the waste, the purpose is to transport the waste together with the waste so as not to release the waste itself or sewage from the container on the way.

Therefore, the container (8) employed in the method of the present invention needs to have the following material and other conditions. In other words, (a) the material may be of any material, but since it is disposable, it must be cheap and easily available; (b) it must be made of any material, but it must be cheap and easily available; (c) It is non-recoverable and disposable, so it cannot be incinerated or landfilled at a post-transportation treatment plant. (2) The material must be made of a material that does not cause secondary pollution, (2) It must be waterproof so that it will not ooze out from the sewage of the garbage, (5) The lid of the container must have a reliable sealing ability so that it will not fall off during transportation, (2) ) In the case of a bag-shaped bag, the knots of the bag must be securely tightened to prevent them from unraveling, but the material, strength, tightening force, etc. are determined by the transportation speed, the curvature of the transport pipe,
It is determined in relation to the material, weight of the filling, etc.

In addition, there are various types of containers (8) as shown in Figures 6 and 6. Figure 3 is a ball-shaped container that can be broken into two pieces, and after filling with garbage, it is wrapped with packing tape (10 ), etc., and the bag shown in Fig. 4 is shaped like a bag and is tied at the opening. The container (8) in Figure 5 is shaped like a paper cylinder, and the lid and main body are secured with duct tape, etc., and the container in Figure 6 is shaped like a carton, with the opening closed. The parts are held together with staples or duct tape.

The sizes of containers (8) having such various shapes are as follows:
It is necessary to be able to pass smoothly through the transport pipe (2),
It is essential that the cross-sectional size of the container is smaller than the cross-sectional size of the transport pipe.

In addition, there are no restrictions on the length of the container in the longitudinal direction if the transport pipe has only a straight pipe section, but since there is a curved pipe section, the length is restricted by the curvature of the curved pipe section. However, the important thing is that the size should be large enough to allow the cargo to pass through smoothly.
It can be determined geometrically from the correlation between the equivalent diameter, length, and curvature of the container (8). The size determined by this is the maximum allowable size, and it is desirable that the size is smaller than this. There is a limit to the volume of kitchen waste actually discharged from households, and an appropriate volume is between 51 and 21. Also, its mass is determined by its size, that is, its volume and the contents to be filled, and if the wind speed and pressure necessary to transport it are applied,
Can be easily transported.

Although the method of the present invention has been described for the case where garbage is transported from a garbage storage facility to a collection station, even when the garbage is transported from a collection station to another disposal site by a transport vehicle, it can be transported as is in a container. . Furthermore, although the present invention was mainly explained as a countermeasure to prevent the harmful effects of foul odors and sewage, in severe cold weather, the garbage itself freezes in storage areas and transport pipes. Since there is no leakage, the container (8) can be made into a mesh-like container that will not be damaged.Also, since the method of the present invention packs the garbage containing sewage into the container, it is possible to store the garbage containing sewage during severe cold weather. Even when transported, it does not adhere to the inner wall surface of the transport pipe and freeze, and an increase in pipe resistance can be prevented.

As mentioned above, the method of the present invention can be applied to paper, plastic, glass, cans, plant wood chips, etc. that do not contain sewage or emit bad odors.
Rubber, leather, earth and sand, fibers, and metals are stored and transported in loose or bundled form, or in paper or plastic bags, but garbage that emits a foul odor or that contains sewage must be stored and transported during transportation. Because the container is packed and transported in an unbreakable container, the container will not be torn during transportation and the garbage containing sewage or the garbage that emits a foul odor will not be mixed with other loose garbage, preventing bad odors. This makes it possible to downsize or omit the deodorizing equipment, reduce maintenance costs, and cause no pollution problems.Furthermore, it does not cause dirty water to flow out, so it is possible to reduce the size of equipment. It has the advantage of being able to prevent corrosive effects, eliminating the corrosion of all parts of equipment that come into contact with dirt, reducing the selection of materials, and preventing the formation of a sticky layer of dirt caused by dirty water. It can have a great effect.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the urban pneumatic transportation system, Figure 2 is an explanatory diagram showing the transportation status according to the method of the present invention, and Figure 6 (A).
Figure 6 (I3) is an example of a container used in the method of the present invention.
is its cross-sectional view, Figure 4 is the other part of the container, and Figure 5 (G).
5) is a cross-sectional view thereof, and FIG. 6 is a further view of the container. (1)... Garbage storage facility, (2)... Transport pipe, (3
)...Collection station, (8)...Container, (9)
...Loose garbage.

Claims (1)

[Claims] 1) Among municipal waste, distinguish between garbage that emits bad odors and garbage that contains sewage, and other garbage, and store garbage that has odors and sewage in a container that is strong and watertight so that it will not be damaged during transportation. A method of transporting municipal waste, which is characterized by storing and transporting municipal waste in a sealed container together with other waste.