JPS6411525B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a transport system that prevents waste from freezing and adhering to the inner walls of transport pipes when a pneumatic transport system for municipal waste is installed in a cold region. This relates to a device for preventing freezing and adhesion of waste in pipes.

[Prior Art] A conventional pneumatic transportation device for municipal waste is disclosed in Japanese Utility Model Publication No. 59-43290. An overview of the pneumatic transport device will be explained with reference to FIG.

Garbage storage facilities (garbage posts) 1a, 1b, 1c, 1d, 1e,
Transport pipe 2 buried underground with 1f and 1g installed
supply valves 3a, 3b, 3c, 3d, 3 in a, respectively.
e, 3f, and 3g, and the transport pipe 2a is located in the common ditch 4 or is connected to the cyclone 7, which is the primary separator in the collection station 6, while being buried underground. In 2b,
Connected via cutoff valves 5a, 5b, 5c, 5d,
The collection station 6 includes the cyclone 7,
A bag filter 8, a deodorizing device 9, and an air source (blower) 10 are sequentially connected via an air pipe 11, and a silencer 13 is connected to the upstream side of the air source 10 via an air intake valve 12. The air pipe 14 on the downstream side of the air source 10 is configured to be open to the atmosphere via a silencer 15. Although four air sources 10 are shown as an example, one is a spare, and a system in which the deodorizing device 9 is installed after the air source 10 is also adopted.

During operation, once the waste is temporarily stored in the waste storage facility, the air intake valve 12 is opened and the air source 1 is turned on.
0, open the supply valve 3a of a predetermined waste storage facility (for example, 1a) according to a predetermined program, and close the above-mentioned atmospheric intake valve 12.
The garbage stored in the garbage storage facility is sucked together with the atmosphere through the supply valve 3a, and then transferred to the transport pipes 2a and 2b.
The air is then sent to the cyclone 7 of the collection station 6 where it is separated from the air. The air containing dust is led to a bag filter 8 to separate the dust, and then deodorized by a deodorizing device 9, passed through an air pipe 11, is pressurized by an air source 10, and is discharged to the atmosphere via a silencer 15. On the other hand, the garbage separated by the cyclone 7 is transferred from a collection drum or the like to a transport vehicle.

When the garbage stored in one garbage storage facility is collected in this way, it is automatically switched to other garbage storage facilities for collection and transportation in the same way.

[Problems to be Solved by the Invention] As mentioned above, the conventional pneumatic transportation device for municipal waste is capable of vacuum collecting the garbage that has been input and stored, but when the temperature is -10°C to -10°C. If garbage collection and transportation is carried out in an area that experiences severe cold, with temperatures dropping to around 40 degrees Celsius, the following problems may occur. In other words, in the case of severe cold,
Transport pipes that connect waste storage facilities and collection stations are buried at a certain depth and are kept at a higher temperature than the atmosphere, but when air is sucked into the pipes during vacuum transport of waste, temperatures range from -10°C to -40°C. The inner wall of the pipe is cooled by the cold air passing through the transport pipe. Therefore, (a) the inner surface temperature of the transport pipe decreases.

(b) When transporting garbage containing sewage (moisture),
When this dust comes into contact with the cooled inner wall of the pipe, it immediately freezes and adheres to the inner wall of the pipe.

(c) If the operation time is long, especially the portion of the transport pipe near the collection station will be exposed to cold air for a long time, and the phenomenon of dust adhesion will become significant due to cooling.

(d) When dirt adheres to the inner wall of a transport pipe, an uneven surface is created on the inner wall of the pipe, and this is formed throughout the pipe, which increases the frictional resistance of the pipe due to the air flow, and the air Not only does the power consumption of the blower increase, resulting in increased energy consumption, but there is a risk that the blower may become inoperable.

(e) If a part of the transport pipe is placed inside a common ditch, the phenomenon of freezing and adhesion will become even more pronounced as there will be no exchange of underground heat compared to when the pipe is buried underground. This is based on the fact that the inside of the common ditch is constantly ventilated and the temperature is almost at atmospheric temperature, so both the inside and outside of the transport pipe are exposed to cold air.

(f) In the case of underground pipes, garbage that freezes and adheres to the inner wall surface of the pipe during transportation is melted by underground heat and accumulates at the bottom of the pipe after operation is completed, but in the case of underground pipes, it remains frozen and adheres to the pipe. There is. Therefore, during the next operation, the garbage accumulated at the bottom of the pipe will be transported at the same time, increasing transport resistance. Moreover, since the operation starts with the inside of the common ditch already frozen and adhered to it from the previous operation, the resistance becomes even greater, and the amount of frozen debris increases, leading to the worst situation of blockage in the pipe and system operation stoppage. It turns out.

The purpose of the present invention is to eliminate the above-mentioned problems that may occur when a pneumatic transport system for municipal waste is installed in a cold area. This increases the air temperature within the transport pipe to prevent freezing and adhesion.

[Means for Solving the Problems] The present invention provides an apparatus for pneumatically transporting municipal waste input and stored in a waste storage facility to a collection station through a transport pipe, and a collection station installed in the apparatus. A pipe is provided to bypass the air source, and an air source other than the collecting air source is connected to the bypass pipe, and the discharge side of the separate air source is communicated with the pipe network, and the air source is connected to the bypass pipe. This system is characterized by being configured so that exhaust air from a separate air source can be blown into the pipe network.

[Function] When the collection operation is stopped, such as before the start of collection and transportation of municipal waste or after the completion of collection and transportation, exhaust air from an air source provided separately from the collection air source is sent into the pipe network via the bypass pipe, and the pipe This increases the air temperature inside the pipe to prevent debris from freezing and adhering to the pipe.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows an outline of the apparatus of the present invention, and when the transportation pipeline network is more complicated than the case shown in FIG. The present invention is applied to cases where the distance is far from . To explain in detail, the transport pipe 2b
A plurality of branch pipes 2c are branched to a plurality of transport pipes 2a, which are connected to the transport pipes 2a through cutoff valves 5a, 5b, 5c, 5d, and 5e, respectively, and each transport pipe 2c is connected to the waste storage facility 1a.
~1n, and connect each transport pipe 2a to the A line, B line, C line, D line, sequentially from left to right in the figure.
On the other hand, the collecting station 6 is equipped with a cyclone 7, a back filter 8, a deodorizing device 9, and an air source 10, as in the conventional system shown in FIG.
are connected by an air pipe 11, and an air intake valve 12 and a silencer 13 are connected to the intake side of the air source 10.
In the configuration in which an air pipe 14 and a silencer 15 are connected to the discharge side of the 0, the air pipes 11 and 14 are connected via a bypass pipe 16, and a A small air source 17 is installed exclusively for cleaning, and a bypass pipe 16 is connected to the suction side of the air source 17.
Valves 18 and 1 are installed on the air pipe 11 and 14 sides, respectively.
9, and the discharge side of the air source 17 is connected to the transport pipe 2a of the A line to E line with a suction line 2 having a discharge valve 26 and a pressure gauge 27 in the middle.
0, and valves 21, 22, 23, 24, and 25 are provided on the pipe network side of the suction line 20, that is, on the connection side to each transport pipe 2a.
In addition, between each line of the pipeline network, as shown in the figure, there is a pipe 2 between each end of the A line, B line, and C line.
8, the ends of the C line and the D line are connected by a pipe 29, and the ends of the D line and the E line are connected by a pipe 30, respectively. 31 indicates a switching valve.

With the above configuration, the operation for preventing the freezing and adhesion of particles to the inner surface of the pipe is performed as follows.

() In the case of transportation pipeline cleaning operation After the collection operation is completed, open the air intake valve 12, valves 18 and 2.
6, 21, 22, 23, 24, 25 are opened, the shutoff valves 5a to 5e are opened, and the valve 19 of the bypass pipe 16 and the switching valve 31 are closed. Start 17. As a result, air is sucked in through the silencer 13 and the atmospheric suction valve 12, bypasses the collecting air source 10, is sucked into the air source 17 through the bypass pipe 16, is pressurized, and passes through the blowing line 20 to each valve 21, 22. ,23,
24 and 25, and is exhausted into the transport network of each line. In this case, the discharge valve 26 is throttled as necessary to increase the adiabatic temperature and lower the temperature of the discharged air.

By discharging the exhaust air from the dedicated air source 17 into the pipe network, heated air accumulates within the pipe network,
Since there is no way for this air to escape, the pressure also increases. This pressure is detected by a pressure gauge 27, and when a certain constant pressure is reached, the dedicated air source 17 is stopped and all valves are closed. The valves at each waste storage facility remain closed, allowing warm air to remain trapped within the pipe network.

After a certain period of time, the frozen garbage on the inner surface of the pipe will melt and accumulate at the bottom of the pipe.Next, the regular collection operation will be carried out to remove the air from the waste storage facility of each line from A line to E line. It inhales and pneumatically transports the dirt that accumulates at the bottom of the pipes, cleaning the pipe network.

In the above operation, the present invention uses a separate small air source 17 in addition to the collecting air source 10, so the power required is smaller than when using the collecting air source 10, and the blowing The filling line 20 may also be a thin pipe, which can eliminate waste of equipment.

In addition, in the above operation, if an exhaust port to the atmosphere is provided at the farthest end of the pipe network, and the air source 17 is operated continuously to gradually discharge the blown exhaust gas from the above-mentioned discharge port, the pipe line The internal temperature can be maintained for a longer time.

() In case of collection operation using dedicated air source 17 During garbage collection operation, this is an operation in which the temperature of the air used for transportation is raised as much as possible to prevent freezing inside the pipes.

That is, before starting the collection operation, the dedicated air source 17 is activated in the same manner as described in () above to raise the temperature in the pipe network in advance.

When the collection operation time arrives, the switching valve 31 and the atmospheric intake valve 12 are opened, the valve 19 of the bypass pipe 16 and the discharge valve 26 are opened, and the collection air source 10 is driven with the valve 18 closed. do. As a result, air is sucked into the air source 10 via the silencer 13 and the atmosphere suction valve 12, where it is pressurized and released into the atmosphere via the air pipe 14 and the silencer 15.

Next, open the shutoff valve 5a of the A line, which is the first collection line, open the air intake valve (not shown) of the garbage storage facility (garbage post) 1b to be collected, and at the same time open the valve 22, and 17.

Next, when the air intake valve 12 is closed, air flows in from the air intake valve of the waste storage facility 1b, and at the same time, a part of the exhaust gas whose temperature has increased from the air source 10 is transferred to the valve 1.
9, the air is sucked into the dedicated air source 17, passes through the blow line 20, enters the B line, and passes through the pipe 28 to the A
enters the end of the line and joins the suction atmosphere,
The garbage in the garbage storage facility 1b is transported to a collection station 6. In this case, the waste in the waste storage facility 1b is transported by a mixture of atmospheric air and warmed air inserted by the dedicated air source 17, so that the transport air itself has a higher temperature than the atmospheric temperature and therefore , it is possible to prevent freezing inside the pipeline.

When the collection of garbage from garbage storage facility 1b is completed,
The valve of the next waste storage facility 1a is opened, and the valve of the waste storage facility 1b and the valve 22 are closed. As a result, the waste in the waste storage facility 1a is transferred between the atmosphere, the transport pipe 2a, and the branch pipe 2.
It is transported to the connection point X with c. The transportation time to this point X is set using a timer or the like, this time is detected, and the valve 22 is opened. As a result, the heated air is again inserted from the waste storage facility 1b at the end and is combined with the suction atmosphere at point X, and the A line becomes the heated air and flows together with the waste, heading towards the collection station 6.

Generally, the length l of the branched pipe 2c is very short, so during this period of transporting the waste, even if the dedicated air source 17 remains in operation, the B line becomes one air tank. There will be no overload. If there is a possibility, a bypass valve (not shown) may be provided.

When the collection of garbage from garbage storage facility 1a is completed,
Next, when the shutoff valve 5b is opened, the valve 21 is opened, the valve of the waste storage facility 1e is opened, and the valve 22 is closed, the collection operation of the B line is started, and the heated air is transferred to the A
It passes through the line and is sent to the terminal waste storage facility 1e via piping 28. Therefore, the garbage in the garbage storage facility 1e is transported to the collection station 6 together with this heated air and the atmosphere sucked from the storage facility 1e.

The garbage from the garbage storage facilities 1d and 1c is sequentially transported in the same manner, and after the collection and transportation of the B line is completed, operation is performed to the C line, D line, and E line.

In the present invention, as described above, the terminal storage facility sections of each collection block are connected by separate pipes 28, 29, and 30, and the heated air is used as part of the collected air. However, the method of connecting the separate pipes is Depending on the shape of the pipe network, the waste storage facility 1a may not necessarily be located at the end, and the operation order may be such that the waste storage facility 1a is placed before the waste storage facility 1b on the A line.

[Effects of the Invention] As described above, according to the present invention, a pipe that bypasses a collection air source is provided, a small dedicated air source is connected to the bypass pipe, and the exhaust air from the dedicated air source is routed through the pipe network. Since the temperature of the air inside the pipe is raised and the air is collected, the following effects can be achieved.

(i) Even if moisture-containing debris freezes and adheres to the inner surface of the transport pipe, it can be removed and cleaned before the next operation.

(ii) When transporting heated exhaust air mixed with transport air, it is possible to prevent the inner surface temperature of the transport pipe from dropping, making it difficult for the phenomenon of freezing and adhesion to occur.

(iii) Since frozen deposits on the inner surface of the transport pipe do not accumulate, there is no need to increase power due to increased air resistance.

(iv) Since exhaust heat from the air source is used, it is also part of energy saving measures.

(v) Since a dedicated air source is used, it is smaller and requires less power than when a collection air source is used.

(vi) It is very effective when applied to extremely cold regions.

[Brief explanation of drawings]

FIG. 1 is a flow sheet of a conventional municipal waste pneumatic transportation system, and FIG. 2 is a flow sheet of a municipal waste pneumatic transportation system showing an embodiment of the present invention. 1a to 1n... Garbage storage facility, 2a, 2b... Transport pipe, 6... Collection station, 10... Collection air source, 16... Bypass pipe, 17... Dedicated air source, 20
...Blow-in line.

Claims (1)

[Claims] 1. In a device that pneumatically transports municipal waste input and stored in a waste storage facility to a collection station through a transport pipe, a pipe is provided that bypasses the collection air source built into the device, and a pipe is provided in the bypass pipe to bypass the collection air source built into the device. An air source separate from the collecting air source is connected, and the discharge side of the separate air source is communicated with the pipe network, and the exhaust air from the separate air source is blown into the pipe network. 1. A device for preventing freezing and adhesion of waste in transport pipes for pneumatic transport of municipal waste, characterized in that the device is configured to allow transport of municipal waste by air.