JPH1045206A - Garbage secondary transporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To significantly reduce the pressure loss in garbage transportation by setting the inside diameter of the trunk line of a pneumatic transport pipe so as to be increased from a primary collecting center to a secondary center. SOLUTION: The trunk line of a secondary transport pipe 30 is formed of a plurality of different diameter pipes set to substantially the same piping plate thickness so that the inside diameter of the trunk line is increased toward a secondary collecting center 4. For example, a first transport pipe 30a of 500 A size is used from the terminal side to about 1Km, a second transport pipe 30b of 550A size to 1.8Km from it, and a third transport pipe 30c thereafter. The transporting wind velocity near the secondary collecting center 4 is minimized, compared with the operation under the same operating condition as in a conventional coincident diameter pipe line. Therefore, even when a long transport distance causes a reduction in pneumatic pressure in transportation, extreme increase in transporting wind velocity near the secondary collecting center 4 can be suppressed to significantly reduce the pressure loss.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary garbage transport apparatus for garbage collected at a primary collection center, which is pneumatically transported by generating an air flow in a transport pipe by a blower, and collected and disposed at a secondary collection center. It is about.

[0002]

2. Description of the Related Art Conventionally, refuse introduced from a refuse inlet of a building or the like is air-transported in a primary transport pipe by, for example, a primary blower to be pneumatically transported and collected at a primary collection center. There is known a garbage pipe transport system that collects the waste at a secondary collection center by a secondary transport pipe that generates an air flow and discards (or incinerates) the waste.
FIG. 6 is a system diagram of a refuse pneumatic transportation plant for explaining a conventional refuse pipe transportation system for collecting such refuse by pneumatic transportation, and FIG. 7 is a second diagram for explaining the operation of the refuse secondary transportation device. It is a figure which shows the time series data of the suction pressure at the time of the next blower operation.

[0003] This pipeline transport system includes a primary transport plant that pneumatically transports refuse discharged into a branch pipe 1a or 1b from a refuse input port of a building or the like by a primary transport pipe 1 and collects the waste at a primary collection center 2. And a secondary transport plant that collects the refuse collected in the primary collection center 2 in the secondary collection center 4 by the secondary transport pipe 3 and disposes (or incinerates) it.

The primary collection center 2 has a primary separator 5A composed of a cyclone dust separator for separating dust and air,
A switching conveyor 6 that sorts and discharges the refuse separated by the primary separator 5A, and the separated refuse that is connected to both ends of the switching conveyer 6 and divides and discharges the refuse under vacuum pressure in a rotating drum having a spiral blade on the inner surface. Storage / discharge device 8 for continuously compressing and storing and discharging via discharge valves 7a and 7b
a, 8b and fine dust not separated by the primary separator 5A are collected by passing through a filter cloth or the like, and the discharge valve 10
And a primary blower that generates an air flow in the primary transport pipe 1 by sucking air in the primary transport pipe 1 through the primary separator 5A and the primary bag filter 9A. 11A and primary blower 11
A primary air cooler 12A that is disposed on the discharge side of A and cools air that has been heated by the compression of the primary blower 11A, and is disposed downstream of the primary air cooler 12A to remove the smell of dust contained in the air. A primary deodorizing device 13A that exhausts air to the outside and a control device that controls the drive system of the primary blower 11A and the switching conveyor 6, and controls the opening and closing timing of the intake valve 14 and the exhaust valve 15 at the end of the primary transport pipe line. 16 are installed.

[0005] The equipment of the secondary collection center 4 is basically configured in the same manner as the primary collection center 2 described above, and has a secondary separator 5B composed of a cyclone dust separator for separating garbage and air, and an airtight function. A continuous discharge device 17 for continuously discharging the waste separated by the secondary separator 5B to the waste pit of the incinerator in the atmosphere, and a filter cloth or the like for removing fine dust not separated by the secondary separator 5B. A discharge device 18 including a secondary bag filter 9B that collects by passing through and discharges through a discharge valve 10B, and a screw conveyor or the like that discharges dust collected by the secondary bag filter 9B to a garbage pit of an incinerator. A secondary blower 11B for generating airflow in the secondary transport pipe 3 by sucking air in the secondary transport pipe 3 through the secondary separator 5B and the secondary bag filter 9B; Is disposed in the discharge side of the blower 11B,
A secondary air cooler 12B that cools the air heated by the compression of the secondary blower 11B, and a secondary air cooler 12B that is disposed downstream of the secondary air cooler 12B and exhausts the air outside after removing the smell of dust contained in the air A secondary deodorizer 13B, a pressure gauge 21 provided on a blower suction side pipe 19 between the secondary bag filter 9B and the secondary blower 11B via a pressure guiding tube,
In addition to controlling the wind speed of the secondary blower 11B based on the detection result of the pressure gauge 21, control of the drive system of the continuous discharge device 17 and the discharge device 18, and the intake valve 22a,
A control device 23 for controlling the opening and closing of the discharge valves 7a and 7b and the like is provided.

[0006] In such a case, the collection of refuse from a refuse input port of a building or the like to the primary collection center 2 is performed as follows. First, the intake valve (here, the intake valve 14) at the end of the line from which waste is to be collected is opened, and the primary transport pipe 1 and the branch pipe 1a are opened by the primary blower 11A.
The air in the inside is sucked, and the dust is discharged into the air flow from the discharge valve 15 of the dust inlet port equipment. The discharged garbage is carried on the air flow and is carried to the primary collection center 2. The garbage carried to the primary collection center 2 is separated from the air by the primary separator 5A, falls downward, is sorted by the switching conveyor 6, and is carried to the storage and discharge device (here, the storage and discharge device 8a). , Compressed and stored. Fine dust that is not separated by the primary separator 5A is collected by the primary bag filter 9A. The air separated from garbage is
After being sucked by the primary blower 11A, the primary air cooler 12
After being cooled in A, the odor is removed by the primary deodorizing device 13A and then exhausted to the outside.

Next, in order to collect the refuse and dust collected in the primary collection center 2 in the secondary collection center 4, first, a storage and discharge device for discharging the refuse in the primary collection center 2 (here, the storage and discharge device 8a and the storage and discharge device 8a). 2) is opened, the secondary blower 11B on the secondary collection center 4 side sucks the air in the secondary transport pipe 3, and discharges the stored dust of the storage and discharge device 8a into the air flow. 7a, and
Dust is discharged from the discharge valve 10A of the primary bag filter 9A. The refuse and dust discharged into the secondary transport pipe 3 are transported in an air flow and are transported to the secondary collection center 4. The garbage carried to the secondary collection center 4 is separated from the air by the secondary separator 5B, falls downward, and is continuously discharged to the garbage pit of the incineration facility by the continuous discharge device 17 having an airtight function. . Fine dust that is not separated by the secondary separator 5B is collected by the secondary bag filter 9B, and is discharged from the discharge valve 10B to the waste pit of the incinerator. After the air separated from the refuse is sucked into the secondary blower 11B, it is cooled by the secondary air cooler 12B, and the odor is removed by the secondary deodorizer 13B, and then exhausted to the outside.

By the way, a secondary transport plant using a conventional pipeline transport system has a pipe diameter of 400A to 600A (generally indicating an outer diameter), similarly to a normal primary transport plant.
Are used, and are all set to the same pipe inner diameter in the same plant. Further, the pipe inner diameter is determined because the pressure loss increases as the transport distance increases, and the pressure exceeding the blower production capacity (generally -600
(0 mmH ₂ O or more), the inside diameter is increased over the entire length of the pipe to reduce the pressure loss, thereby increasing the suction port diameter at the end of the pipe and reducing the required suction force of the blower. It is designed to be.

[0009] In the case of relatively easy transportation, office and household garbage can be transported at a low wind speed, while a large amount of garbage is generated in a hotel or the like. Need to increase the wind speed. However, in the secondary transport plant, since the waste once collected in the primary collection center 2 is collected again through the pipeline, it is difficult to specify which waste is to be collected. For this reason,
Conventionally, the vehicle is operated with the transport wind speed constantly set to a high wind speed.

[0010]

The conventional secondary transportation device for refuse is configured as described above, and the inner diameter of the pipe is set to the same diameter from the starting point to the ending point as in the primary transportation plant. Becomes longer, the air pressure during transportation decreases, and the air in the pipe expands, so that the transportation wind speed, that is, the transportation air volume, becomes extremely large. For example, the air volume Q1 passing through a cross section near the intake valve in the secondary transport pipe 3 is Q1 = 280 m ³ / min, and the pressure P1 at this point is P1 = 10330 mmH ₂ O (atmospheric pressure).
Q2 the air volume passing through the secondary collection center near the cross-section of the secondary transport pipe 3, when the pressure P2 at this point and _{P2 = -2000 mmH 2 O, Q1} × P1 = Q2 × P2 Q2 = Q1 × P1 / P2 And P2 is converted to absolute pressure, 10330-2000 = 8330mmH
_{Since it is 2} O, Q2 = 280 × 10330/8330 = 347 m ³ / min. For this reason, the transport resistance increases, and it is necessary to increase the pressure of the secondary blower 11B.

When the pressure loss exceeds the production capacity of the secondary blower 11B, it is necessary to increase the inner diameter over the entire length of the secondary transport pipe 3, thereby increasing the suction port diameter at the end of the pipe. Therefore, the power of the secondary blower 11B increases, and the construction cost of the piping also increases.

Further, since the inner diameter of the pipe is set to be the same from the start point to the end point, the wind speed becomes higher at a portion closer to the secondary collection center 4 and the amount of wear of the pipe becomes larger (although it depends on the transport distance, the end of the pipe increases). Parts 1.5 to 2 times the size), and the pipe plate thickness needs to be thicker as it is closer to the collection center.

In the primary transportation plant, the inside diameter of the pipe near the waste inlet (the inside diameter of the branch pipe) is made smaller than the inside diameter of the main line of the transportation pipe, thereby locally increasing the wind speed near the waste inlet. A device for preventing the accumulation of dust near the dust inlet (Japanese Patent Application Laid-Open No. 61-55)
No. 002), the inner diameter of the main line of the transport pipe is set to be the same from the start point to the end point. It is inevitable that the pressure decreases and the air in the pipe expands, and the transport wind speed, that is, the transport air volume, becomes extremely large. It is necessary to increase the thickness of the pipe plate as it approaches the collection center.

Further, in a primary transportation plant, there has already been proposed one in which an increase in the amount of wear of piping caused by an increase in wind speed is dealt with by increasing the thickness of piping. For example, the end portion (each input portion) is set to 500A, and the portion near the primary collection center is set to 550A, and the pipe diameter (outer diameter) is set.
Is set as the increase in the pipe thickness, and the inner diameter of the pipe is set to be the same from the start point to the end point.

The amount of abrasion of the pipe is proportional to the amount of dust passing therethrough. In the case of primary transport, unlike secondary transport,
The amount of dust passing through at the end differs greatly from 1/10 to 1/100 with respect to the vicinity of the primary collection center. For example, assuming that the amount of waste passing through the end portion is 1 ton / day, the pipe thickness is 7.9 mm, and the amount of waste passing near the collection center is 50 ton / day, the pipe thickness of the transport pipe near the collection center is 395 mm is required. In this case, the inner diameter of the pipe becomes 0 mm or less, and it becomes impossible to secure even a gap through which the dust flows. For this reason, conventionally, materials with high wear resistance have been adopted in stages to reduce the pipe thickness and keep the inner diameter of the pipe from becoming smaller. However, it is still impossible to cope with this, and the pipe size (outer diameter of the pipe) must be increased. This ensures the thickness of the pipe plate, thereby preventing the pipe inner diameter from becoming too small near the collection center.

On the other hand, in the secondary transport, since the amount of waste passing through the end portion and the vicinity of the secondary collection center does not change, the abrasion amount of the pipe does not become extremely large unlike the primary transport plant. However, when the transport distance becomes longer, in the conventional garbage secondary transport plant in which the inner diameter of the pipe is set to the same diameter from the start point to the end point, as described above, the wind speed increases as the portion is closer to the secondary collection center 4. Therefore, the thickness of the pipe plate must be increased as it is closer to the collection center.
Further, since the transport resistance increases, it is inevitable that the pressure of the secondary blower 11B needs to be increased.

Further, in the secondary transportation plant, it is not possible to determine what kind of waste is supplied from the primary collection center 2 because the waste once collected in the primary collection center 2 is collected again through the pipeline. Since the transport wind speed is constantly set to the safe wind speed, the secondary blower 11
Not only does the amount of power used by B increase, but also the amount of wear on the pipes increases (the amount of wear on the pipes increases in proportion to the square of the transport wind speed), and there is a problem that the cost of repairing perforated pipes increases.

Conventionally, when there is a rising portion in the secondary transport plant, the pipe is set to have an inclination angle of 20 degrees or less so that dust is hardly deposited. Furthermore, once the refuse is accumulated, it cannot be released unless the transport wind speed is considerably increased. Therefore, the capacity of the secondary blower 11B is set based on an emergency. In this case, a secondary blower 11B having a high capacity can be employed in case of an emergency, but the equipment cost becomes extremely high.
In practice, a secondary blower having a normal capacity is adopted, and the wind speed is usually set to have a margin of about 20% with respect to the operating capacity of the secondary blower, and in the case of an emergency, the margin is used by using the margin. Like that. For this reason, the secondary transport pipe 3
When a large amount of garbage and the like was discharged into the inside and once accumulated in the pipe, even if the wind speed was slightly increased, the capacity was insufficient, and the accumulation could not be released. In such a state, the sediment must be released by cleaning with a pig or manually by a worker entering the inside of the pipe.

The discharge of refuse into the secondary transport pipe 3 is as follows:
Storage and discharge devices 8a, 8 using conveyors and rotating drums
b and is detected by a pressure gauge 21 installed on a pipe 19 immediately before the blower 11B.
Is stopped when the suction pressure becomes equal to or higher than a predetermined value (threshold value), and the secondary blower 11B is controlled so as not to reach the surge region. That is, by detecting the pressure fluctuation in the middle of the secondary transport pipe 3 by the pressure gauge 21 installed in the secondary collection center 4, the control of discharging and stopping the refuse is performed. For this reason, when the transport distance becomes long, the time delay until the pressure fluctuation in the middle of the secondary transport pipe 3 reaches the secondary collection center 4 is large, and the discharge of refuse must be stopped in a pressure state with a considerable margin. I didn't get it. Furthermore, even if the pressure state returns to the normal state due to the stoppage of the discharge of dust, there is a large time delay until the return state is detected on the secondary collection center 4 side. As a result, the pressure fluctuation in the secondary transport pipe 3 is reduced. There is a problem that the time from the point of occurrence to the stop and resumption of the waste becomes longer, and the operation time required from the discharge of a certain amount of waste to the collection becomes longer. For example, secondary blower 11B
If the maximum suction pressure is -6000mmH ₂ O of, but should be carried out emissions of dust as originally maximized suction pressure,
Even if the discharge amount is constant, the pressure loss during transportation greatly fluctuates due to the quality of the refuse, and when the operation is performed with the maximum suction pressure set, the pressure of the secondary blower 11B is constantly overloaded due to the fluctuation of the refuse, and the plant Stops. Therefore, the threshold value is actually set to -4500 mm as shown in FIG.
When the threshold value is set to H ₂ O and the threshold value is exceeded, the discharge of the refuse is stopped (there is a time delay, so the pressure increases even after the refuse discharge is stopped). The plant is prevented from being stopped due to an overload due to a time delay of pressure fluctuation detection in the middle of the secondary transport pipe 3. For this reason, the suction capacity of the secondary blower 11B cannot be used to the utmost, and the time during which the refuse can be discharged within the operation time becomes short, and the discharge stop time becomes long, so that it is necessary to collect a certain amount of refuse. There was a problem that the operation time became long.

In a primary transport plant, the control of the discharge of dust into the transport pipe is performed based on the measurement results of an anemometer or a pressure gauge installed in a collection center (Japanese Patent Laid-Open No. 59-172303). Publication) has been proposed, but even in such a case, it is inevitable that the above-mentioned time lag of pressure fluctuation detection occurs, and the above-mentioned various problems are involved. ing.

In view of the above description, the present invention reduces pressure loss during transportation, reduces pipe diameter (especially the inlet diameter) and pipe thickness, reduces blower air volume (wind speed), and reduces waste discharge. It is an object of the present invention to provide a refuse secondary transportation device capable of increasing the number of operation times, reducing the operation time, reducing the amount of power consumption, preventing refuse from being deposited, and facilitating the work to release the deposited material when the refuse is deposited.

[0022]

According to a first aspect of the present invention, there is provided a secondary waste transport apparatus having the following configuration.
In other words, in a secondary waste transport device where waste collected at the primary collection center is pneumatically transported by generating airflow in a transport pipe with a blower and collected and disposed of at a secondary collection center, the inner diameter of the main line of the transport pipe Is set to increase as the distance from the secondary collection center increases. According to the first aspect of the present invention, since the inner diameter of the trunk line of the transport pipe is set to be larger as it approaches the secondary collection center, the cross-sectional area of the trunk pipe of the transport pipe is close to the secondary collection center. Accordingly, the transport wind speed near the secondary collection center and the inlet diameter at the end of the transport pipe become smaller as compared with the case where the conventional pipe line is operated under the same operating conditions. As a result, even if the transportation distance is long and the air pressure during transportation is low, it is possible to suppress the extreme increase in the transportation wind speed near the secondary collection center, and to significantly reduce the pressure loss during transportation of waste. it can. In addition, there is no need to increase the thickness of the piping plate near the secondary collection center, and the thickness of the piping plate can be made almost the same at the end and near the secondary collection center, and the piping outer diameter can be reduced accordingly. Can be. In addition, since the intake diameter at the end of the transport pipe can be reduced, the air volume of the blower can be reduced, and the equipment inside the secondary collection center including the blower can be reduced, and the construction cost of the secondary collection center can be reduced. The space of the secondary collection center can be reduced.

Further, the secondary waste transport device according to claim 2 of the present invention has the following configuration. That is,
The waste collected at the primary collection center is provided in the intake pipe at the end of the transport pipe in the secondary waste transport device where the air is transported by generating airflow in the transport pipe by the blower, and the waste is collected and disposed of at the secondary collection center. The apparatus is provided with an intake air velocity measuring device and a control device for controlling at least one of an amount of dust discharged into the transport pipe and a blower air velocity based on a measurement result of the intake air velocity measuring instrument. In the invention of claim 2,
The quality of the refuse to be transported is constantly fluctuating, and when refuse that is difficult to transport is discharged into the transport pipe, the amount of intake air at the end decreases instantaneously, making the refuse difficult to transport. The wind speed at this time is measured by an intake wind speed measuring device, and it is determined instantly by a control device in the secondary collection center whether or not the discharged dust is about to accumulate. The control device controls so that the discharge of the refuse is stopped when the wind speed measured by the intake wind speed measuring device becomes equal to or lower than a certain value, and the discharge of the refuse is restarted when the wind speed at the terminal is recovered. The discharge of the waste is restarted by gradually increasing the amount of the discharged waste when the intake wind speed has recovered to the set value or more. In this way, the accumulation (blockage) of dust is prevented. Further, if the intake wind speed does not recover after a certain period of time, the control device increases the set wind speed of the blower. Furthermore, when the wind speed drop at the end portion frequently occurs within a certain period of time, the control device determines that a large amount of refuse difficult to transport is discharged, increases the set wind speed of the blower, and the refuse hardly accumulates. Change to operation mode. Furthermore, if the wind speed at the terminal end does not decrease within a certain period of time after increasing the set wind speed of the blower, the controller reduces the set wind speed of the blower and operates at an unnecessarily high wind speed. To avoid. The control of the amount of waste discharged may be performed on either the secondary collection center side or the primary collection center side.

Further, the secondary waste transport device according to claim 3 of the present invention has the following configuration. That is,
In a secondary garbage transport system where garbage collected at the primary collection center is pneumatically transported by generating airflow in the transport pipe with a blower, collected at the secondary collection center, and disposed of, the rising part in the main line of the transport pipe A pressure gauge installed at a plurality of locations including before and after the ascending pipe, and a control device for controlling at least one of the amount of dust discharged into the transport pipe and the wind speed of the blower based on the measurement result of the pressure gauge. Things. In the invention of claim 3, the numerical value (measured value) displayed by each pressure gauge is used for judging the quality of the waste. In addition, from the pressure difference between adjacent pressure gauges in each pressure gauge, the state of clogging in the transport pipe between them is determined. For example, if garbage or the like that is difficult to be transported in the transport pipe is discharged, or if garbage or the like is present in the transport pipe, the pressure loss increases. This situation is immediately detected by a pressure gauge near the garbage, and then sequentially from the pressure gauge to a remote pressure gauge with a time difference based on a set distance between the pressure gauges and a set wind speed of the blower. Therefore, on the side of the secondary collection center, if the garbage or the like is discharged into the transport pipe or the garbage or the like exists in the transport pipe, it can be instantaneously determined. Then, when the garbage or the like reaches a portion where it is difficult to transport the refuse such as the rising portion of the transport pipe main line, it is deposited on the bottom of the rising portion of the main line, and the pressure loss in that section increases. This situation is instantaneously determined on the secondary collection center side from the pressure difference between the pressure gauges before and after the rising pipe. And
Depending on the value of the differential pressure at this time, waste discharge regulation (reduction of the discharge amount or interruption of discharge) and an increase in the wind speed of the blower are performed, and the dust that is about to accumulate is quickly released. When the accumulated dust is released, the pressure difference before and after the rising pipe recovers within a certain value. This situation is also instantaneously determined on the secondary collection center side, and the wind speed of the blower is reduced. As described above, the pressure condition in each section is grasped by the pressure gauges installed at a plurality of locations in the transport pipe main line. Therefore, when each pressure gauge is provided at every 500 m, for example, if the transport speed of the waste is 10 m / sec, the transport pressure loss for the waste for about 50 seconds is measured, and the transport is easy. It is possible to determine whether it is garbage or garbage that is difficult to transport. If the pressure value in each section exceeds a certain value,
The discharge amount of refuse is gradually reduced (discharge suppression), and when the pressure further increases, the discharge is stopped to prevent the blower from being overloaded. Therefore, unlike the conventional case where the blower inlet pressure is measured on the secondary collection center side and the amount of waste is controlled, the system can respond instantaneously to the transport situation in all areas of the main transport line. It is possible to stably discharge dust to a pressure close to the maximum capacity of the blower and to operate the blower. Further, if the discharge suppression continues for a certain period of time, it is determined that the refuse that is difficult to transport is continuously discharged, and control is performed to increase the wind speed of the blower. This prevents the accumulation of dust.

Further, the secondary waste transport device according to claim 4 of the present invention has the following configuration. That is,
The garbage collected in the primary collection center is pneumatically transported into the transport pipe by a blower through an air flow introduced from a first intake valve at the end thereof, and collected in the secondary collection center for disposal in the garbage secondary transport device. Pressure gauges installed at a plurality of locations including before and after the rising pipe when there is a rising part in the pipe main line, a second intake valve newly installed in the middle of the transport pipe main line, and measurement results of each pressure gauge And a control device for controlling at least one of the amount of waste discharged into the transport pipe and the wind speed of the blower and controlling the opening and closing of the second intake valve. In the invention of claim 4, for example, the second intake valve is installed at a position 1.5 km from the end in the main trunk line of the transportation pipe, and the pressure loss on the downstream side is controlled by the dust emission suppression control and the blower wind speed control. If it does not recover, the discharge of dust is stopped, and the second intake valve is opened for a certain time to introduce outside air.
Thus, not only can a large pressure fluctuation be forcibly induced in the main line of the transport pipe to move the dust on the downstream side of the second intake valve toward the secondary collection center, but also the second intake valve can be moved. The waste on the upstream side can be moved in the opposite direction (terminal direction) and can be moved for 1.5 km (about 3000 mmH).
All the suction pressure of ₂ O) can be used as a margin pressure. Therefore, it is possible to automatically release the deposit without any problem even in a situation where the blower is usually overloaded, and it is not necessary to clean the pig or remove the deposit by an operator.

According to a fifth aspect of the present invention, there is provided a secondary waste transport apparatus according to the fourth aspect, wherein the second intake valve of the fourth aspect is disposed immediately before the rising pipe. In the fifth aspect of the present invention, when the garbage or the like reaches a portion where the refuse is difficult to transport, such as the rising portion of the transport pipe main line, the garbage accumulates at the bottom of the rising portion of the main line, and the pressure loss in that section increases. If this situation is not recovered by the dust emission suppression control or the blower wind speed control, the dust emission is stopped, and the second intake valve is opened for a certain time to introduce outside air. As a result, a large pressure fluctuation can be forcibly induced in the ascending pipe, and the refuse deposited on the bottom of the ascending pipe can be shaken by being blown with outside air to be stirred, and the transport pipe end (the discharge of refuse) Part) to the second intake valve can all be used as the margin pressure. For this reason, even if the distance of the rising pipe is long and vertical transportation is required, the automatic release of the deposit can be performed without any problem.

Further, in the secondary waste transport apparatus according to claim 6 of the present invention, when there is a descending pipe rising through a horizontal pipe on the upstream side of the rising pipe of claim 5, the horizontal pipe of the descending pipe is provided. A third intake valve is newly provided just before the connection with the third intake valve. In the invention of claim 6, when there is a detour part for bypassing, for example, a subway, a waterway, etc., in the middle of the main line of the transportation pipe, this detour part is relatively long and requires extreme descending and rising. In such a case, if the intake valve (second intake valve) of the rising part is opened, all the refuse flowing in the descending part on the upstream side is deposited at the lowermost part of the descending part and a blockage occurs. It will be easier. For this reason, a new third intake valve is provided immediately before the connecting portion of the descending pipe with the horizontal pipe, and for example, before the second intake valve is opened, dust flowing in the descending section on the upstream side of the third intake valve may form a bending point. During the passage (for several tens of seconds), the lower intake valve (third intake valve) is opened, and then the second intake valve is opened. This makes it possible to control the intake valve (second intake valve) in the downstream ascending portion without causing the obstruction of dust at the upstream descending bottom. When the refuse is deposited at the lowermost part of the descending part, the deposit can be automatically released by opening only the third intake valve with the second intake valve closed.

Also, in the secondary waste transport apparatus according to claim 7 of the present invention, the inner diameter of the trunk line of the transport pipe according to claim 2 to 6 is increased stepwise as it approaches the secondary collection center. It is set. In the invention of claim 7, since the inner diameter of the main line of the transport pipe is set to be gradually increased as it approaches the secondary collection center, the pipe to be used can be selected from ordinary pipe products, The cost can be kept low, and even if the transportation distance is long and the air pressure during transportation is low, it is possible to suppress the extreme increase in the transportation wind speed near the secondary collection center, and the pressure during garbage transportation Loss can be greatly reduced. Further, it is not necessary to increase the thickness of the piping plate near the secondary collection center, so that the end portion and the vicinity of the secondary collection center can have substantially the same value, and the outer diameter of the piping can be reduced accordingly. Furthermore, since the intake diameter at the end of the transport pipe can be reduced, the air volume of the blower can be reduced, and the equipment in the secondary collection center can be reduced accordingly, and the construction cost of the secondary collection center can be reduced. The space of the collection center can be reduced.

Further, in the secondary waste transport apparatus according to claim 8 of the present invention, when there is a rising portion in the second or subsequent stage where the inner diameter of the transport pipe in the main line is enlarged, the second embodiment is characterized in that: The inner diameter of the pipe at the rising portion is set smaller than the inner diameter of the pipe immediately before. According to the eighth aspect of the present invention, since the inner diameter of the ascending pipe is set smaller than the inner diameter of the pipe immediately before it, and the cross-sectional area of the transport pipe main line is smaller at the ascending pipe section, the transport wind speed at the ascending pipe section is reduced. Is faster. Therefore, the refuse that has reached the ascending pipe portion is accelerated in speed and is lifted up to the upper end of the ascending pipe at a stretch. Therefore, even garbage such as kitchen refuse which is difficult to transport does not accumulate on the bottom of the rising pipe.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, the present invention will be described with reference to the illustrated embodiments. FIG. 1 is a system diagram of a waste air transport plant for explaining a secondary waste transport device according to claims 1, 2 and 7 of the present invention, and FIG. 2 is a transport distance and air pressure in piping by the secondary waste transport device. FIG. 3 is a diagram showing the relationship with the loss in comparison with the related art.
FIG. 3 is a diagram showing time-series data of suction pressure during the operation of the secondary blower for explaining the operation of the garbage secondary transport device. In FIG. 1, a portion corresponding to the aforementioned conventional example (FIG. 6) includes The same reference numerals are given.

In the refuse secondary transport device of the present embodiment, the inner diameter of the main line of the secondary transport pipe 30 is set to be larger as it is closer to the secondary collection center 4, and at the end of the secondary transport pipe main line. A flow meter 31 for measuring the intake wind speed is provided in each intake pipe near the intake valves 22a and 22b.
a and 31b are provided. Here, as a method for expanding the inner diameter of the main line of the secondary transport pipe 30, different diameter pipes having different inner diameters of 500A to 600A (generally indicating an outer diameter) are used, and these different diameter pipes are used as secondary collection centers. It was arranged so that it gradually increased as it approached 4. That is, the main line of the secondary transport pipe 30 is composed of a plurality of different diameter pipes each having a pipe plate thickness set to substantially the same thickness. Therefore, an increase in the pipe outer diameter means an increase in the pipe inner diameter,
The first transport pipe 30a having a size of 500A up to about 1km from the terminal side, the second transport pipe 30b having a size of 550A up to 1.8km thereafter, and the third transport pipe 30b having a size of 600A thereafter.
It is composed of a transport pipe 30c. In addition, the secondary transport pipe 3
As a method of expanding the inner diameter of the main line of 0, it is also possible to use a transport pipe whose inner diameter continuously increases, which is ideal. However, since the cost is high, a stepwise expansion method is required. Adopted.

In the secondary collection center 4, a control device 23A for controlling the amount of dust discharged into the secondary transport pipe 30 and the wind speed of the secondary blower 11B based on the measurement results of the flow meters 31a and 31b is provided. Provided. The control of the amount of waste discharged is performed by controlling the respective rotary drums and discharge valves 7a and 7b of the storage and discharge devices 8a and 8b on the primary collection center 2 side.
The control of 7b does not necessarily need to be performed on the secondary collection center 4 side, and may be performed on the primary collection center 2 side. This is the same in the second and third embodiments described later. Other configurations are the same as those of the above-described conventional example.

In the refuse secondary transport device of the present embodiment,
The quality of the refuse to be transported is constantly fluctuating, and refuse that is difficult to transport is collected and discharged by the storage and discharge device 8a or 8 on the primary collection center 2 side.
When the air is discharged from b into the secondary transport pipe 30, the amount of intake air at the end of the secondary transport pipe is instantaneously reduced, so that it is difficult to transport refuse. The wind speed at this time is the flow meter 31a or 3
1b. In the controller 23A, each flow meter 31
The measurement values of a and 31b are constantly monitored, and it is instantaneously determined whether or not the discharged dust is about to accumulate. When the wind speed measured by the flow meter 31a or 31b is a fixed value or less (for example, 15 m / sec or less) for several seconds (for example, 5 seconds), the control device 23A controls the rotating drum of the storage / discharge device for discharging dust. Stop the rotation of the, and temporarily stop the waste. As a result, when the wind speed at the end of the secondary transport pipe recovers, the control device 23A restarts the discharge of dust. When resuming refuse, the amount of refuse is increased stepwise (for example, 1 m ³ / min is continued for 1 minute, and then increased to 2 m ³ / min) when the intake wind speed recovers to the set value or more. It is performed by In this way, the accumulation (blockage) of dust is prevented.

If the intake air speed does not recover even after a certain period of time (for example, one minute) has elapsed after stopping the discharge of dust, the control device 23A increases the set wind speed of the secondary blower 11B (for example, from 23 m / sec). 26m / sec).

The control unit 23A is provided with the secondary blower 11
If the wind speed at the end does not decrease within a certain time (for example, 5 minutes) after the set wind speed of B is increased, the set wind speed of the secondary blower 11B is changed to (for example, 26 m / sec).
To 23 m / sec) to avoid operating at wind speeds faster than necessary.

The controller 23A determines that a large amount of refuse that is difficult to transport has been discharged when the wind speed at the terminal end decreases a plurality of times (for example, three times) within a predetermined time (for example, five minutes). Then, the set wind speed of the secondary blower 11B is increased, and the operation mode is changed to an operation mode in which dust is hardly accumulated. In this operation mode, first, the set wind speed of the secondary blower 11B is increased by one step (for example, from 23 m / sec to 26 m / sec), and even after the increase by one step, the wind speed at the end portion still decreases for a certain period of time (for example, 3 m / sec). In the case where a plurality of times (for example, two times) occur within one minute, the set wind speed of the secondary blower 11B is increased by another step (for example, from 26 m / sec to 29 m / sec).

The controller 23A reduces the current set wind speed (for example, from 23 m / sec to 20 m) when the discharge of the dust is not suppressed or the discharge is not interrupted within a predetermined time (for example, 5 minutes).
/ sec) and change to the power saving operation mode.

In short, the set wind speed of the secondary blower 11B has four stages (for example, 20 m / sec, 23 m / sec, 26 m / sec,
29 m / sec), and can be increased or decreased stepwise according to the conditions described above.

In the refuse secondary transport device of the present embodiment, the inner diameter of the main line of the secondary transport pipe 30 is set so as to increase as it approaches the secondary collection center 4. As the cross-sectional area of the main line becomes larger as it approaches the secondary collection center 4, the transport wind speed near the secondary collection center becomes smaller than when the same operating conditions as those of the conventional pipe with the same diameter are used. And become smaller. For this reason, even if the transportation distance is long and the air pressure during transportation is low, an extreme increase in the transportation wind speed near the secondary collection center can be suppressed, and the pressure loss is significantly reduced as shown in FIG. be able to. In addition, there is no need to increase the thickness of the piping plate near the secondary collection center, and the thickness of the piping plate can be made almost the same at the end and near the secondary collection center, and the piping outer diameter can be reduced accordingly. Can be.
As a result, the piping construction cost was reduced by 20%.

Further, since the diameter of the intake port at the end of the secondary transport pipe can be reduced as compared with the case where the conventional system is operated under the same operating conditions, the air volume of the secondary blower 11B can be reduced, and accordingly, the secondary blower 11B Equipment in the secondary collection center, including
That is, most of the devices such as the secondary separator 5B, the secondary bag filter 9B, and the secondary deodorizing device 13B became smaller, and the construction cost of the secondary collection center 4 could be reduced by 25%. Further conventional even secondary collection center 4 of space transformation 1200 m ² from 50
The compression was reduced to less than half of 0 m ² . Furthermore, since the air volume of the secondary blower 11B can be reduced, the amount of abrasion of the secondary transport pipe main line can be reduced by 30% as compared with the conventional method.
Repair costs for the secondary transport main line were also reduced.

Further, the waste material to be transported is supplied to flow meters 31a, 31 provided in each intake pipe at the end of the secondary transport pipe main line.
Based on the measured value of b, the controller 23A in the secondary collection center 4 makes an instantaneous determination at the stage when the refuse is discharged into the secondary transport pipe 30, controls the discharge of the refuse, and according to the situation. Since the set wind speed of the secondary blower 11B is increased / decreased, there is no time delay in detecting pressure fluctuations in the secondary transport pipe main line, and the suction capacity of the secondary blower 11B is maximized as shown in FIG. It can be used, the time from the occurrence of pressure fluctuations in the secondary transport pipeline main line to the stoppage and resumption of waste is shortened, and the time during which waste can be discharged within the operation time is extended, and the discharge is stopped The operation time required to collect a certain amount of waste has been reduced as compared with the conventional method. That is, according to the present embodiment, the operation can be completed in 7 hours, whereas the operation time conventionally required 9 hours per day. For this reason, the secondary blower 11
The power consumption of B can be reduced by 20%, and the running cost can be reduced by about 10 million yen annually. Further, in addition to the reduction of the running cost, it is possible to reduce the electric power (23%) corresponding to the reduction of the operation time and the overtime cost of the operator.

The inner diameter of the secondary collection center 4
The flowmeters 31a and 31b for measuring the intake air velocity are provided as an example in the intake pipe at the end of the main line of the secondary transport pipe which is set so as to become larger as the flowmeter approaches. Needless to say, the present invention can be applied to the conventional type in which the pipes have the same diameter over the entire length of the line, and even in such a case, it is necessary to eliminate the time lag of detecting the pressure fluctuation in the main line of the secondary transport pipe. Can be.

Also, here, an example in which the flow meters 31a and 31b for measuring the intake air velocity are applied to a secondary transportation plant has been described. This means that regardless of the type of garbage collected at the primary collection center (for example, using a vehicle) or if the quality of the refuse to be supplied cannot be determined, the collection of garbage at the secondary collection center is air. This means that the present invention can be applied if the transportation is performed.
However, as shown here, when the waste collection to the primary collection center is also performed by air transportation, the primary transport plant knows the characteristics of the collection target area (waste quality, etc.). May be linked to the control of the secondary collection center.

Here, based on the measurement results of the flow meters 31a and 31b, the control device 23A controls both the amount of dust discharged into the secondary transport pipe 30 and the wind speed of the secondary blower 11B. However, it is not always necessary to control both, and the flow meters 31a, 31b
It is needless to say that the intended purpose can be achieved even if only the amount of waste discharged into the secondary transport pipe 30 or only the wind speed of the secondary blower 11B is controlled based on the measurement results of the above.

Embodiment 2 FIG. 4 shows claims 3 and 7 of the present invention.
1 is a system diagram of a refuse pneumatic transportation plant for explaining a refuse secondary transportation device according to (1), in which parts corresponding to those in the above-described first embodiment (FIG. 1) are denoted by the same reference numerals.

In the secondary refuse transporting apparatus of this embodiment, the inner diameter of the main line of the secondary transport pipe 30A, which has a rising portion in the middle of the transport line, increases stepwise as it approaches the secondary collection center 4. And pressure gauges 44a, 44 at a plurality of locations including before and after the ascending pipe via pressure guiding pipes.
b, 44c and 44d are installed. That is, the main line of the secondary transport pipe 30A is composed of a plurality of different diameter pipes each having a pipe plate thickness set to be substantially the same, so that an increase in the pipe outer diameter means an increase in the pipe inner diameter, The first transport pipe 30a has a size of 500A, the second transport pipe 30b has a size of 550A, and the third transport pipe 30c has a size of 600A.

The second transport pipe 30b has a rising portion 41 formed at the end thereof, a horizontal portion 42 formed at an intermediate portion thereof, and a descending portion 43 formed at the center thereof. The piping portion immediately before the rising portion and the piping portion immediately after the rising portion are formed. Pressure gauges 44b and 44c are arranged on the horizontal portion 42, respectively.

Further, in the secondary collection center 4, the amount of waste discharged into the secondary transport pipe 30A and the secondary blower 11B based on the measurement results of the pressure gauges 44a, 44b, 44c and 44d.
Is provided with a control device 23B for controlling the wind speed. The other configuration is the same as that of the first embodiment.

In the waste secondary transport device of this embodiment, the numerical values (measured values) indicated by the pressure gauges 44a, 44b, 44c and 44d are used for determining the quality of the waste. As described above, when the transport distance increases, the value of the air pressure loss differs depending on the distance from the end (see FIG. 2). For this reason, refuse that is difficult to transport is removed from each pressure gauge 44a, 44b, 44.
When making a determination based on the measured values of c and 44d, the threshold used as the determination reference is set to the same value for all the pressure gauges. For example, when the pressure gauge 44a on the most upstream side is used as a reference, Although the quality of the waste can be determined, the pressure gauge on the downstream side always exceeds the threshold value, and it is erroneously determined that there is always hard-to-transport waste on the downstream side. If the threshold value is set to the same value for all the pressure gauges based on the pressure gauge 44d on the most downstream side, the quality of the waste can be determined on the most downstream side. Even if there is refuse that is difficult to transport, the air pressure loss value is smaller than the most downstream side, so unless the blockage occurs, the threshold value will not be exceeded unless there is only trash that is easy to transport. Misjudgment. Therefore, each of the pressure gauges 44a, 44b,
The threshold values of 44c and 44d are set to values that take into account the air pressure loss according to each set position (distance from the end), and varied according to the position. Further, each pressure gauge 44a,
Each of the thresholds 44b, 44c, and 44d can be changed in a plurality of stages, and the discharge of dust and the wind speed of the secondary blower 11B are increased in accordance with each stage.

Now, the threshold value inherent to any one of the pressure gauges has three levels (for example, -1000, -1300, -1500 mm).
H ₂ O), and the indicated value (measured value) of the pressure gauge is set to the first-stage threshold value (−1000 mmH _2).
O), the control device 23B controls the rotating drum of the storage / discharge device that discharges the refuse to gradually discharge the refuse (for example, after the discharge amount of 3 m ³ / min is continued for 1 minute). (To 2 m ³ / min). This allows
When the measured value of the pressure gauge becomes lower than the first-stage threshold value, the control device 23B restarts the discharge of dust. Discharge resumption of waste, at the stage when the measurement value of the pressure gauge falls below the first stage threshold (e.g. -9000mmH ₂ O), the emission of dust stepwise (e.g. emissions 2m ³ / min This is done by increasing the volume (to 3 m ³ / min, after one minute). In this way, the accumulation (blockage) of dust is prevented.

Further, if the measured value of the pressure gauge still rises even if the amount of discharged dust is reduced and exceeds the second-stage threshold value (-1300 mmH ₂ O), the control device 23B controls the storage / discharge device. The rotation of the rotating drum is stopped, and the discharge of refuse is temporarily stopped. Nevertheless the measured value of the pressure gauge is increased, if it exceeds 3-stage threshold (-1500mmH ₂ O), setting wind speed of the secondary blower 11B (e.g. 23m
/ sec to 26 m / sec).

Further, the control device 23B controls the secondary blower 11
After the set wind speed of B is increased, the measured value of the pressure gauge decreases, and becomes lower than the third threshold value (for example, -1400).
mmH ₂ O), the set wind speed of the secondary blower 11B is reduced (for example, from 26 m / sec to 23 m / sec) to avoid operating at an unnecessarily high wind speed.

Further, the control device 23B controls the secondary blower 11
If the measured value of the pressure gauge still does not decrease even if the set wind speed of B is increased, the set wind speed of the secondary blower 11B is increased by one more.
The step is increased (for example, from 26 m / sec to 29 m / sec).

The control device 23B reduces the current set wind speed (for example, from 23 m / sec to 20 m) when the discharge of the dust is not suppressed or the discharge is not interrupted within a predetermined time (for example, 5 minutes).
/ sec) and change to the power saving operation mode.

In the case where the threshold value unique to each pressure gauge is set in two stages, when the measured value of the pressure gauge exceeds the threshold value of the first stage, the amount of waste is gradually reduced, and If the threshold value is exceeded, the discharge of the dust is stopped. If the threshold value of the second stage is exceeded even after a certain period of time (for example, 30 seconds) has passed since the stop of the discharge of the dust, the secondary blower 11B Gradually increase the set wind speed. Then, when the measured value of the pressure gauge becomes lower than the threshold value of the second stage, the secondary blower 11B
Set the wind speed to gradually decrease to the original wind speed, and when it becomes lower than the first threshold value, restart the discharge of refuse and exceed the first threshold value after a certain period of time. If there is not, control is performed so that the amount of waste is increased stepwise.

When the threshold value unique to each pressure gauge is set to a fixed value, the set wind speed of the secondary blower 11B is minimized (for example, 20 m / sec) when switching from one of the storage and discharge devices 8a and 8b to the other. Reset to. This is the storage and discharge device 8a,
If the set wind speed of the secondary blower 11B is set high at the time of switching 8b, the value of the air pressure loss indicates a high value even without discharging dust, and exceeds the threshold value specific to each pressure gauge. Because. In other words, the threshold value unique to each pressure gauge can be changed in a plurality of stages as described above, so that it is possible to gently respond to the wind speed fluctuation at the time of switching between the storage and discharge devices 8a and 8b.
There is no need to reset the set wind speed to a minimum.

In the refuse secondary transport device of this embodiment, the differential pressure value (absolute value) between adjacent pressure gauges in each of the pressure gauges 44a, 44b, 44c, 44d is used to determine the secondary transport pipe 30A between them. Is determined in the main line. In this case, the differential pressure value between the pressure gauges is obtained after subtracting the value of the air pressure loss based on the set position of each pressure gauge.

Now, if garbage or the like which is difficult to be transported into the secondary transport pipe 30A is discharged or if garbage or the like is present in the secondary transport pipe main line, the pressure loss increases. This situation is
The pressure is immediately detected by a pressure gauge near the kitchen, and is then sequentially detected with a time difference based on the set distance between the pressure gauges and the set wind speed of the secondary blower 11B from the pressure gauge to a distant pressure gauge. For this reason, on the secondary collection center 4 side, kitchen waste etc. is discharged into the secondary transport pipe 30A,
Alternatively, if there is kitchen garbage or the like in the secondary transport pipe main line, this can be instantaneously determined. And when kitchen waste etc. reach the rising part 41 of the secondary transportation main line,
It accumulates at the bottom of the rising portion 41, and the pressure loss in that section increases. This situation is due to the pressure gauges 44b, 44
c the pressure difference exceeds a certain value (for example, usually 500 mmH ₂
When the differential pressure of O exceeds 750 mmH ₂ O), the secondary collection center 4 determines instantaneously. The control device 23B
The differential pressure between the pressure gauges 44b and 44c is constant (750 mmH _2).
When O) is exceeded, the amount of waste discharged is reduced stepwise as described above. As a result, when the pressure difference between the pressure gauges 44b and 44c drops below a certain value (for example, usually 400 mmH ₂ O), the controller 23B increases the amount of waste discharged stepwise as described above.

Further, the controller 23B stops the discharge of the dust when the pressure difference between the pressure gauges 44b and 44c rises and exceeds a certain value (1000 mmH ₂ O) even if the discharge amount of the waste is reduced. At the same time, the set wind speed of the secondary blower 11B is increased stepwise as described above.

The control such as the suppression of dust discharge based on the above differential pressure value and the increase in the wind speed of the secondary blower 11B are similarly performed over the entire section of the secondary transport pipe main line.

In short, the set wind speed of the secondary blower 11B has four stages (for example, 20 m / sec, 23 m / sec, 26 m / sec,
29 m / sec), and can be increased or decreased stepwise according to the conditions described above.

In this manner, each of the pressure gauges 44a, 44b, 44c, 44d installed at a plurality of locations in the transport pipe line.
Thus, the pressure condition in each section is grasped. Therefore,
Each of the pressure gauges 44a, 44b, 44c, 44d is, for example, 50
If it is provided every 0m, the garbage transportation speed is 10m
If it is / sec, it means that the transport pressure loss for the waste for about 50 seconds is measured, and it is possible to determine whether the waste is easy to transport or difficult to transport.

When the pressure value or the differential pressure value in each section exceeds a certain value, the amount of waste discharged is reduced stepwise, and when the pressure value or the differential pressure value further increases, the discharge is stopped. This prevents the secondary blower 11B from being overloaded. Therefore, unlike the conventional case of measuring the inlet pressure of the blower at the secondary collection center side and controlling the amount of refuse discharged, it is possible to respond instantaneously to the transport situation in the entire area of the secondary transport pipeline main line. In addition, it is possible to continuously and stably discharge dust to a pressure close to the maximum capacity of the secondary blower 11B and to operate the secondary blower 11B.

Further, when the discharge control is continued for a certain period of time, it is determined that a large amount of refuse which is difficult to transport is discharged, and control is performed so as to increase the wind speed of the secondary blower 11B. Is prevented.

The inner diameter of the secondary collection center 4
Pressure gauges 44a, 44 at a plurality of locations in the secondary transportation main line set so as to gradually increase as
4b, 44c, and 44d are described as examples, but these pressure gauges 44a, 44b, 44c, and 44d are used.
It is needless to say that the pressure condition in each section can be grasped without time delay even in such a case in the conventional method in which the same diameter pipe is set over the entire length of the secondary transport pipe main line. can do.

Here, each of the pressure gauges 44a, 44b,
Based on the measurement results of 44c and 44d, the controller 23B controls the amount of waste discharged into the secondary transport pipe 30A and the secondary blower 11
Although the description has been given by taking an example in which both of the wind speeds of B are controlled, it is not always necessary to control both, and the secondary transport pipe is controlled based on the measurement results of the pressure gauges 44a, 44b, 44c, and 44d. It is needless to say that the intended purpose can be achieved even if only the amount of waste discharged into 30A or only the wind speed of the secondary blower 11B is controlled.

Embodiment 3 FIG. 5 shows claim 4 of the present invention.
It is a system diagram of the refuse pneumatic transportation plant for explaining the refuse secondary transportation equipment concerning 5, 6, 7, and 8, and the same numerals in the figure correspond to the above-mentioned second embodiment (FIG. 4). Is attached.

The refuse secondary transport device of this embodiment basically has the inner diameter of the main line of the secondary transport pipe 30B having a descending portion and an ascending portion whose lower ends are connected by a horizontal portion in the middle of the transport line. The pressure gauges are set so as to gradually increase as the distance from the secondary collection center 4 increases.
b, 44c, and 44d are installed, and the second and third intake valves 54a, 54 are newly provided in the middle of the secondary transport pipe main line.
b is provided.

That is, the trunk line of the secondary transport pipe 30B is composed of a plurality of different diameter pipes each having a pipe plate thickness set to be substantially the same. Therefore, the expansion of the pipe outer diameter requires the expansion of the pipe inner diameter. In other words, the first transport pipe 30a having a size of 500A, the second transport pipe 30b having a size of 550A, and the third transport pipe 30c having a size of 600A are basically constituted from the terminal side.

The second transport pipe 30b has a descending portion 51 formed at the end thereof, a horizontal portion 52 formed at an intermediate portion thereof, and a rising portion 53 formed at the center thereof. It is set smaller than the inner diameter of the pipe of the immediately preceding horizontal portion 52. Here, a 500A pipe having the same diameter as the first transport pipe 30a was used as the pipe of the rising portion 53. Then, in the second transport pipe 30b, immediately before the connecting portion of the horizontal portion 52 below the 550A size to the rising portion 53, and to the connecting portion 53 of the horizontal portion above the 550A size, which is on the downstream side. Immediately after the pressure gauge 44c,
44d are arranged.

Further, the second intake valve 54a is provided immediately before the pressure gauge 44c of the lower horizontal portion 52, and the second intake valve 54a is provided immediately before the connecting portion of the descending portion 51 rising from the upstream end of the horizontal portion 52 to the horizontal portion 52. Three intake valves 54b are arranged.

Further, in the secondary collection center 4, the amount of dust discharged into the secondary transport pipe 30B and the secondary blower 11B based on the measurement results of the pressure gauges 44a, 44b, 44c, 44d.
And the second and third intake valves 5
Control device 23 that performs opening / closing timing control of 4a and 54b
C is provided. Note that the intake valves 22a and 22b at the end of the secondary transport pipe main line are hereinafter referred to as first intake valves. Other configurations are the same as those of the above-described second embodiment.

In the refuse secondary transport device of this embodiment, the second intake valve 54a in the secondary transport pipe main line is connected to, for example, 1.5 km from the end (first intake valve) of the secondary transport pipe main line. Installed at the site, the pressure loss on the downstream side,
If the recovery is not achieved by the dust emission suppression control or the wind speed control of the secondary blower 11B, the dust emission is stopped, and the second intake valve 54a is opened for a certain time to introduce outside air. As a result, a large pressure fluctuation can be forcibly induced in the secondary transport pipe main line,
It is possible to blow the outside air to the refuse that has been deposited on the downstream side of the second intake valve 54a, shake it and shake it, and use all the suction pressure of 1.5 km (about 3000 mmH ₂ O) as a margin pressure. it can. For this reason, normally, even if the secondary blower 11B is overloaded, the deposit can be released without any problem.

If there is a detour that bypasses, for example, a subway or a waterway, in the middle of the secondary transport pipe main line, this detour is relatively long and requires an extreme descent and ascent. Therefore, when kitchen waste or the like reaches the rising portion 53 in the secondary transport pipe main line in which it is difficult to transport refuse, the garbage or the like accumulates at the bottom of the rising portion 53, and the pressure loss in that section increases. If this situation is not recovered by the dust emission suppression control or the blower wind speed control as described in the second embodiment, the dust emission is stopped and the second intake valve 54a is turned on for a certain period of time (when the dust rises). The time required to climb the section) is opened and air is introduced. As a result, a large pressure fluctuation can be forcibly induced in the ascending pipe, and the refuse deposited on the bottom of the ascending pipe can be shaken by being blown with outside air to be agitated. From the discharge part) to the second intake valve 54a can be used as the margin pressure. For this reason, it is possible to automatically release the sediment without any problem even in a portion where the distance of the rising pipe is long and vertical transportation is required, and it is not necessary to perform pig cleaning and sediment releasing work by an operator.

After a certain period of time has elapsed since the opening of the second intake valve 54a, the second intake valve 54a is closed and the pressure gauge 4
If the pressure difference between 4c and 44d has recovered, the discharge of the refuse is restarted. If the pressure difference between the pressure gauges 44c and 44d does not recover and exceeds a certain value, the second intake valve 54a is opened again.

Incidentally, the second intake valve 54 of the rising portion 53
If a is opened, all the debris flowing into the descending part 51 on the upstream side is buried at the lowermost part of the descending part 51, so that the clogging easily occurs. Therefore, before the second intake valve 54a is opened, the dust flowing in the descending portion 51 on the upstream side flows through the bending point to the horizontal portion 52 (for several tens of seconds). 3 is opened, and then the second intake valve 54b is opened.
Is opened. Thus, the second intake valve 54a in the downstream rising portion can be controlled without causing the dust to be blocked at the upstream lowering bottom portion. In addition, when dust is deposited at the lowermost portion of the descending portion 51, it is possible to automatically release the sediment by opening only the third intake valve 54b with the second intake valve 54a closed. Become.

In the apparatus of this embodiment, the inner diameter of the pipe of the rising portion 53 is set smaller than the inner diameter of the pipe immediately before it.
For this reason, the cross-sectional area of the secondary transportation trunk line is
And the transport wind speed at the rising portion 53 increases. Therefore, the dust that has reached the rising portion 53 is accelerated in speed and is pulled up to the upper end of the rising portion 53 at a stretch. Therefore, even garbage such as kitchen refuse which is difficult to transport does not accumulate on the bottom of the rising pipe.

The inner diameter of the secondary collection center 4
Pressure gauges 44a, 44 at a plurality of locations in the secondary transportation main line set so as to gradually increase as
4b, 44c, and 44d, and second and third intake valves 54a and 54b immediately before the rising portion 53 and immediately before the lower bending point of the descending portion 51 in the secondary transport pipe main line. The pressure gauges 44a, 44
4b, 44c, 44d and second and third intake valves 54
Needless to say, a and 54b can also be applied to the conventional type in which the pipes are set to have the same diameter over the entire length of the secondary transport pipe main line, and even in such a case, the pressure situation in each section is delayed. It is possible to cause a large pressure fluctuation in the secondary transport pipe main line and move the dust downstream of the second or third intake valve toward the secondary collection center. Not only can the debris upstream of the second or third intake valve be moved in the opposite (distal) direction. Furthermore, the pressure loss related to the second or third intake valve from the end of the secondary transport pipe (the waste discharge portion) can be used as a margin pressure, and the sediment can be released. .

Here, each of the pressure gauges 44a, 44b,
Based on the measurement results of 44c and 44d, the controller 23C controls the timing of opening and closing the second and third intake valves 54a and 54b, and also controls the amount of dust discharged into the secondary transport pipe 30B and the wind speed of the secondary blower 11B. The above description has been given by taking an example in which both are controlled. However, it is not always necessary to control both, and based on the measurement results of the respective pressure gauges 44a, 44b, 44c, and 44d, the inside of the secondary transport pipe 30B is introduced. It is needless to say that the intended purpose can be achieved by controlling only the amount of waste discharged or only the wind speed of the secondary blower 11B.

[0080]

As described above, according to the first aspect of the present invention, the inner diameter of the trunk line of the transport pipe for pneumatically transporting the waste collected at the primary collection center to the secondary collection center is determined. As it is set to increase as it gets closer to the center, the transport wind speed near the secondary collection center and the inlet diameter at the end of the transport pipe are smaller than when operating under the same operating conditions as the conventional one with the same diameter pipe line. can do. For this reason, even if the transportation distance is long and the air pressure during transportation is low, it is possible to suppress an extreme increase in the transportation wind speed near the secondary collection center, and to significantly reduce the pressure loss during transportation of waste. it can. Further, it is not necessary to increase the thickness of the piping near the secondary collection center, and the thickness of the piping can be substantially the same at the end portion and near the secondary collection center, thereby reducing the outer diameter of the piping. be able to. Furthermore, since the intake diameter at the end of the transport pipe can be reduced, the air volume of the blower can be reduced, and accordingly, the equipment in the secondary collection center including the blower can be reduced, and the construction cost of the secondary collection center can be reduced. At the same time, the space of the secondary collection center can be reduced.

According to the second aspect of the present invention, an intake air velocity measuring device is provided in the intake pipe at the end of the transportation pipe, and the amount of dust discharged into the transportation pipe and the wind velocity of the blower are measured based on the measurement result of the intake air velocity measuring instrument. Since at least one of them is controlled, the status of refuse discharged into the transport pipe can be instantly grasped at the secondary collection center side, and the amount of refuse discharged and the setting wind speed of the blower can be changed according to the situation. And the like can be promptly performed.

According to the third aspect of the present invention, pressure gauges are installed at a plurality of locations including before and after the rising pipe when there is a rising portion in the main line of the transport pipe, and the transport is performed based on the measurement results of these pressure gauges. By controlling at least one of the amount of waste discharged into the pipe and the wind speed of the blower, the secondary collection center can instantly grasp the waste quality and clogging status over the entire area of the transport pipeline. It can operate continuously and constantly discharging dust to a pressure close to the maximum capacity of the blower.

According to the invention of claim 4, pressure gauges are installed at a plurality of places including before and after the ascending pipe when there is an ascending portion in the trunk line of the transport pipe, and a new pressure gauge is provided in the middle of the transport pipe main line. A second intake valve is provided for controlling at least one of the amount of dust discharged into the transport pipe and the wind speed of the blower based on the measurement result of each pressure gauge.
Since the intake valve is controlled to be opened and closed, if the pressure loss downstream of the second intake valve is not recovered by the dust emission suppression control or the blower wind speed control, the dust emission is stopped. By opening the second intake valve for a certain period of time to introduce outside air, a large pressure fluctuation is forcibly induced in the main line of the transport pipe, and the dust on the downstream side of the second intake valve is directed to the secondary collection center. Not only can be moved in the reverse direction, but also the dust on the upstream side of the second intake valve
And the suction pressure from the end of the transport pipe to the second intake valve can be used as a margin pressure. Therefore, it is possible to automatically release the deposit without any problem even in a situation where the blower is usually overloaded, and it is not necessary to clean the pig or remove the deposit by an operator.

According to the fifth aspect of the present invention, since the second intake valve is disposed immediately before the rising pipe, garbage and the like accumulate on the bottom of the rising pipe, and the pressure loss in that section increases. If the situation is not recovered by the dust emission suppression control or the blower wind speed control, open the second intake valve for a certain period of time to introduce outside air, thereby forcing a large pressure fluctuation in the rising pipe. The outside air can be blown to the bottom of the riser pipe to shake and stir, and the pressure loss related to the space between the second end of the transport pipe and the second intake valve can be reduced. All can be used as margin pressure. For this reason,
Automatic release of sediment is possible without problems even in a place where the distance of the rising pipe is long and vertical transportation is required.

According to the invention of claim 6, when there is a descending pipe rising through the horizontal pipe on the upstream side of the ascending pipe, a new pipe is newly provided immediately before the connection of the descending pipe with the horizontal pipe. Since the intake valve of No. 3 is provided, for example, before the second intake valve is opened, while the dust flowing in the descending portion on the upstream side completely passes through the inflection point (for several tens of seconds), the intake valve of the descending portion (the third intake valve) By opening the second intake valve after opening the second intake valve, it is possible to control the second intake valve of the downstream rising portion without causing the obstruction of the dust at the upstream descending bottom. If garbage is deposited at the bottom of the descending part,
By opening only the third intake valve while the intake valve is closed, the automatic release of deposits becomes possible.

Further, according to the invention of claim 7, since the inner diameter of the main line of the transport pipe is set to be gradually increased as it approaches the secondary collection center, the pipe to be used can be selected from ordinary pipe products. Cost can be kept low.

According to the eighth aspect of the present invention, when there is a rising portion in the second or subsequent stage where the inside diameter of the transportation pipe in the main line is enlarged, the piping inside diameter of the rising portion is changed to the piping inside diameter immediately before it. By setting it smaller than that, the cross-sectional area of the main line of the transport pipe is made smaller in the rising pipe section, so that the transport wind speed in the rising pipe section can be increased and the dust reaching the rising pipe section is accelerated. It can be pulled up to the upper end of the rising pipe at a stretch. Therefore, even garbage such as kitchen refuse which is difficult to transport does not accumulate on the bottom of the rising pipe.

[Brief description of the drawings]

FIG. 1 is a system diagram of a refuse pneumatic transport plant for explaining a refuse secondary transport device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a transport distance by the refuse secondary transport device according to the first embodiment and an air pressure loss in a pipe in comparison with the related art.

FIG. 3 is a diagram illustrating time-series data of suction pressure during a secondary blower operation for explaining the operation of the refuse secondary transport device according to the first embodiment.

FIG. 4 is a system diagram of a refuse pneumatic transportation plant for explaining a refuse secondary transportation device according to a second embodiment of the present invention.

FIG. 5 is a system diagram of a refuse pneumatic transportation plant for explaining a refuse secondary transportation device according to a third embodiment of the present invention.

FIG. 6 is a system diagram of a waste air transportation plant for explaining a conventional waste pipeline transportation system.

FIG. 7 is a diagram showing time-series data of suction pressure during a secondary blower operation for explaining the operation of the conventional refuse secondary transport device.

[Explanation of symbols]

 2 Primary collection center 4 Secondary collection center 7a, 7b Discharge valve 8a, 8b Storage / discharge device 11B Secondary blower (blower) 22a, 22b Intake valve (first intake valve) 23A, 23B, 23C Control device 30, 30A, 30B Secondary transport pipe (transport pipe) 30a First transport pipe 30b Second transport pipe 30c Third transport pipe 31a, 31b Flow meter (intake air velocity measuring device) 41, 53 Rising section 44a, 44b, 44c, 44d Pressure gauge 51 Lowering part 52 Horizontal part 54a Second intake valve 54b Third intake valve

Claims (8)

[Claims] 1. A garbage collected in a primary collection center is pneumatically transported by generating an air flow in a transport pipe by a blower,
A secondary waste transport device for collecting and disposing of waste at a secondary collection center, wherein the inner diameter of the main line of the transport pipe is set to be larger as the distance from the secondary collection center increases. apparatus. 2. A garbage collected in a primary collection center is pneumatically transported by generating an air flow in a transport pipe by a blower,
In a secondary waste transport device for collecting and disposing of waste at a secondary collection center, an intake air velocity measuring device provided at an intake pipe at the end of the transport pipe, and discharging of waste into the transport pipe based on a measurement result of the intake wind velocity measuring instrument. A control device for controlling at least one of the amount and the wind speed of the blower. 3. The refuse collected at the primary collection center is pneumatically transported by generating an air flow in a transport pipe by a blower,
In a garbage secondary transport device that collects and disposes of waste at a secondary collection center, a pressure gauge installed at a plurality of locations including before and after the rising pipe when there is a rising portion in the main line of the transport pipe; And a control device for controlling at least one of the amount of waste discharged into the transport pipe and the wind speed of the blower based on the measurement result. 4. A garbage secondary for garbage collected at the primary collection center is pneumatically transported into the transport pipe by a blower through an air flow introduced from a first intake valve at the end thereof, and collected and disposed at the secondary collection center. In the transportation device, a pressure gauge installed at a plurality of locations including before and after the ascending pipe when there is an ascending portion in the trunk line of the transportation pipe; and a second intake valve newly installed in the middle of the transportation pipe main line. And a control device for controlling at least one of the amount of dust discharged into the transport pipe and the wind speed of the blower based on the measurement result of each of the pressure gauges, and controlling opening and closing of the second intake valve. And garbage secondary transport equipment. 5. The refuse secondary transport device according to claim 4, wherein the second intake valve is disposed immediately before the rising pipe. 6. In the case where there is a descending pipe rising through a horizontal pipe on the upstream side of the ascending pipe, a third intake valve is newly provided immediately before a connection of the descending pipe with the horizontal pipe. The garbage secondary transport device according to claim 5, characterized in that: 7. The secondary transport of refuse according to claim 2, wherein the inner diameter of the main line of the transport pipe is set to gradually increase as it approaches the secondary collection center. apparatus. 8. When there is a rising portion in the second or subsequent stage where the inside diameter of the transport pipe in the main line is enlarged, the inside diameter of the rising portion is set smaller than the inside diameter of the pipe immediately before the rising portion. The waste secondary transport device according to claim 7, wherein