JP2000229248A - Method for breaking collected garbage bags - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make easy the agitating and mixing of garbage to contrive to homogenize the garbage and also to cause moisture sealed in garbage bags to flow out to enable continuously and uniformly incinerating the garbage by jetting high pressure water toward the garbages fed into a garbage pit to break the fed garbage bags. SOLUTION: A load-carrying platform 61 of a garbage collecting cart 6 that has entered a carry-in gate 15 is inclined to open a gate 62 and make garbages in the platform 61 fall into a garbage pit 1 to feed them and by controlling a garbage feeding crane 4 from a control room 5, the garbage is grabbed by a grab bucket 41 to feed it into a hopper 3 communicating with an incineration furnace. In this case, in a position below a fallen garbage detection sensor 11, a nozzle 12 for jetting high pressure water toward the garbage falling from a garbage feeding port 1A of the garbage pit 1 is arranged, and a pressurizing device 13 is connected to the nozzle 12 to feed high pressure water having a pressure capable of breaking the garbage bags made of vinyl or paper. In this way, mixing agitation and incineration of the garbage are uniformly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for breaking up collected garbage bags, and more particularly, to a method for removing garbage stored in a plastic bag or the like into a garbage pit in a garbage incineration plant. By forcibly breaking the garbage, it is easy to stir and mix the garbage, making it possible to achieve homogenization of the garbage.Also, the moisture enclosed in the garbage bag together with the garbage is discharged and contained in the garbage The present invention relates to a method for breaking up a collection garbage bag that can reduce the amount of water, increase combustion efficiency, enable continuous and uniform incineration of garbage, and suppress the generation of harmful substances such as dioxin accompanying incineration of garbage. Things.

[0002]

2. Description of the Related Art Conventionally, refuse discharged from general households and the like is collected by a refuse collection truck, carried into a refuse incineration plant, and incinerated. By the way, in the conventional garbage disposal site, the garbage collected by the garbage truck is once thrown into the garbage pit, and the required agitation is performed in this garbage pit using a garbage dumping crane controlled by the operation management system. After mixing and transshipping, the refuse is homogenized and then put into an incineration hopper.

[0003] In this stirring and mixing and reloading performed by using the garbage charging crane, for example, garbage charged from a garbage truck and deposited near the loading gate is grasped by a grab bucket of the garbage loading crane, and is opposite to the loading gate. On the side wall side, the grab bucket of the garbage input crane was opened at a position slightly higher than the height of the garbage in the garbage pit, and the garbage was dropped and the garbage was piled up. .

[0004]

By the way, bulk waste can be homogenized by this transfer, but most of the garbage discharged from homes is made of vinyl or paper. It is collected in a state where it is stored in the garbage, so it is not possible to completely break the garbage bag due to drop impact when reloading garbage, so there is a limit to homogenizing garbage, and furthermore, Due to differences in waste quality and water content inside and outside the bag, especially in small stalker type incinerators, the uneven combustion inside the stalker becomes remarkable, and the combustion speed of the refuse in the incinerator, the amount of generated heat fluctuates, There has been a problem that the incineration temperature changes greatly, and harmful substances such as dioxin are easily generated. That is,
In the small stoker type incinerator of 100 to 200 tons / day, the width of the stalker is at most about 2 m, and if there is a garbage bag of 0.4 to 0.5 m, it is not sufficiently dried locally. The refuse is sent to the combustion stalker, and harmful substances such as dioxin are easily generated.

[0005] Therefore, when the operation rate of the garbage input crane has a margin such as when the amount of refuse accumulated in the garbage pit is small or the amount of refuse input to the hopper is small, the refuse is input for the purpose of breaking the refuse bag. It is common practice to open the grab bucket of the cranes at a high position, drop the grabbed garbage to a low accumulation level, and apply a large drop impact to the garbage bag. Since the operating rate of the crane is reduced, it cannot be used regularly, and there is also a problem in terms of reliability.

In addition, garbage collected by a garbage truck is preliminarily stirred and mixed by using a stirring and mixing facility such as a bag breaking device for breaking garbage bags, thereby homogenizing the refuse.
It is also possible to reduce the amount of harmful substances such as dioxin generated at the time of starting and stopping due to interruption of operation by enabling long-time operation of the incinerator, but this stirring and mixing equipment only increases the equipment cost. However, because of the large size, it is difficult to install it in the garbage pit of the garbage disposal plant, so it is necessary to transport the garbage between the garbage pit and the stirring and mixing equipment, including costs. There was a problem in practical application.

The present invention has been made in view of the above-mentioned problems of the conventional refuse disposal plant, and when a garbage stored in a plastic bag or the like is put into a garbage pit, the garbage bag is forcibly applied to the garbage incineration plant. By breaking the waste, it is easy to stir and mix the garbage, making it possible to homogenize the garbage. It is an object of the present invention to provide a method of breaking a collected garbage bag, which can make incineration possible and suppress generation of harmful substances such as dioxin accompanying incineration of garbage.

[0008]

Means for Solving the Problems In order to achieve the above object, a method for breaking a garbage bag according to the present invention is characterized in that when garbage collected by a garbage truck is put into a garbage pit from the garbage truck, The high-pressure water is jetted toward the refuse thrown into the garbage pit to break the thrown trash bag.

[0009] The method of breaking the collected garbage bag is such that when the garbage is thrown from the garbage truck into the garbage pit, the high-pressure water is jetted toward the garbage that has been thrown into the garbage pit, so that the garbage can be reliably thrown. The bag can be broken, so that the garbage inside and outside the garbage bag can be easily mixed, and furthermore, the garbage can be easily stirred and mixed by a garbage for garbage input, so that the garbage can be homogenized and the water contained in the garbage can be removed. Uniformity can be achieved.

[0010] In this case, it is possible to detect the waste put into the waste pit from the waste collection vehicle by a sensor and to inject high-pressure water based on the detection signal.

[0011] Thus, the amount of high-pressure water used to break the garbage bag can be reduced, and the water content of the garbage can be prevented from rising.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for breaking a garbage bag according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of a refuse treatment plant for incinerating garbage collected from general households, businesses and the like. The garbage collected by the garbage truck 6 from general households, businesses, etc., is not only various types of garbage and garbage in a different state with different moisture content, but also stored in a garbage bag made of vinyl or paper. The state is in a mixed state. The collected waste is once put into the waste pit 1 before being incinerated and is temporarily stored.

As shown in FIG. 1, the garbage pit 1 is provided with a carry-in gate 15 for the garbage truck 6 to enter.
The garbage truck 6, which is disposed so as to open to the upper side surface of the garbage and has entered the home position of the carry-in gate 15 by retreating, inclines the carrier 61 and opens the gate 62, whereby the carrier 6 is opened.
The garbage in the garbage pit 1 naturally falls into the garbage pit 1 and is thrown in.

In addition, a garbage dumping crane 4 is controlled by an operation management system provided in a control room 5 and the like at a position above the garbage pit 1 to travel, traverse, hoist, grab a grab bucket 41, and the like. It is arranged to perform. The grab bucket 41 that holds the garbage can be moved up and down by winding and lowering a wire rope.
The hopper 3 that is connected to the incinerator adjacent to the incinerator is configured to input refuse in response to a request signal for inputting refuse to the incinerator. The refuse input to the hopper 3 is supplied to the incinerator by a conveyer or a refuse supply mechanism (not shown) using hydraulic pressure.

As shown in FIGS. 2 to 3, at the fixed position where the garbage pit 1, more specifically, the garbage collection vehicle 6 that enters upon retreating, stops, as shown in FIGS.
7, a fixed position detection sensor 10 for detecting that the garbage truck has stopped at a fixed position, and a pallet inclination detection for detecting when the pallet 61 of the garbage truck 6 stopped at the fixed position is inclined at a predetermined garbage discharge inclination angle. Sensors 8 and 8, gate opening detection sensors 9 and 9 for detecting the opened gate 62, and falling into the garbage pit 1 when the garbage 61 is inclined and the garbage is thrown into the garbage pit 1 from the opened gate 62. The falling waste detection sensor 11 for detecting waste is attached to the loading gate 15 or the waste pit 1 at a corresponding appropriate position. In this case, a photoelectric sensor is used for each of the sensors 7, 8, 9, 10, 11 in this embodiment, but the type of the sensor is not limited to this. In order to reliably detect the garbage truck 6 having an irregular shape, the sensors 7, 8,
Of the sensors 9, 10, and 11, the sensors 7, 8, and 9 have two sensors arranged side by side as shown in FIGS. The number of sensors is not limited to this.

A nozzle 12 for injecting high-pressure water from the refuse input port 1A of the refuse pit 1 toward refuse falling below the refuse detection sensor 11 is provided. A plurality of nozzles 12 are provided at predetermined intervals, for example, 200 to 300 m, in a horizontal direction so that high-pressure water, which is sprayed equally to all of the garbage input from the garbage truck 6, directly hits the garbage.
They are arranged in one or two rows at intervals of m. A high-pressure water having a pressure capable of breaking a garbage bag made of vinyl or paper by connecting a pressure device 13 to the nozzle 12 is not particularly limited. For example, 2500 kgf / cm ²
Is supplied so that high-pressure water can be jetted from the nozzle 12.

Next, a description will be given of a method of breaking the collected waste using this facility. 2 to 3 show a garbage truck 6 that has collected garbage from households, businesses, etc.
5 shows a situation in which waste is thrown into the waste pit 1 from the waste inlet 1A. As shown in FIG. 2, the garbage truck 6 retreats and enters the front of the garbage inlet 1 </ b> A at a fixed position of the carry-in gate 15. At this time, the garbage collection vehicle 6 detects the approach of the garbage collection vehicle 6 by blocking the light of the entry detection sensors 7, 7, and then detects that the garbage collection vehicle 6 has reached the predetermined home position by the home position detection sensor 10. Detect. The driver of the garbage truck 6 is notified of this by an indicator light 14 disposed at an appropriate position in the carry-in gate 15 so that the driver of the garbage truck 6 can easily and surely confirm it. Thereafter, as shown in FIG. 3, when the gate 62 of the garbage truck is opened and the bed 61 is inclined, the inclination of the bed 61 and the opening of the gate 62 are respectively detected by the bed inclination detecting sensors 8 and 8 and the gate opening detecting sensor 9. , 9.

The bed 61 of the garbage truck 6 stopped at a fixed position
When the dust in the cargo bed 61 is thrown into the garbage pit 1 due to the inclination of the gate 62 and the opening of the gate 62, the garbage falling into the garbage pit 1 is detected by the falling garbage detection sensor 11, and the pressurization is performed by the detection signal. The high-pressure water pressurized by driving the device 13 is discharged along the waste inlet 1A of the waste pit 1 for 20 minutes.
From a plurality of nozzles 12 provided at intervals of 0 to 300 mm,
Spray toward falling garbage. The high-pressure water injected from the nozzle 12 has a water pressure of, for example, 2500 kgf / cm ^2.
As a result, the water jet reaches a speed equivalent to two to three times the speed of sound, and has kinetic energy enough to cut concrete. In addition, it can be easily broken in the vertical direction in a short time. Thereby, the refuse inside and outside the refuse bag can be easily mixed, and the refuse input crane 4 can easily perform the stirring and mixing of the refuse, so that the refuse can be homogenized and the moisture contained in the refuse can be uniformed. It will be.

In this case, by reducing the hole diameter of the nozzle 12 to, for example, about 1 mm or less,
Garbage thrown into the garbage pit 1 from the garbage truck 6
Detected by the falling dust detection sensor 11, and based on this detection signal, combined with the fact that high-pressure water is injected,
It is possible to reduce the amount of high-pressure water used to break the garbage bag, prevent the water contained in the garbage from rising, and prevent the garbage in the next process from being adversely affected. .

If the dust detection signal from the falling dust detection sensor 11 is interrupted for a predetermined time, for example, two to three seconds, it is determined that the dust on the bed 61 has settled, and the pressurizing device 13 is stopped. The jetting of high-pressure water from the nozzle 12 is stopped.

The presence / absence of a dust detection signal from the falling dust detection sensor 11 can be indicated on the display lamp 14 by, for example, a different color for each situation. Thereby, garbage truck 6
Of the garbage truck 6 can quickly grasp the state of the garbage being thrown in without merely looking into the garbage pit 1 and by simply displaying the indicator light 14. The garbage truck 6 can be closed so as to exit the entrance gate 15.

Next, the interlock between the waste input crane 4 in the waste pit 1 and the waste collection vehicle 6 will be described. The interlock between the garbage charging crane 4 and the garbage collection vehicle 6 in the garbage pit 1 indicates that the garbage collection vehicle 6 has retreated and entered the entrance gate 15, and the entry detection sensors 7, 7 are shielded from light. In accordance with the detection signals of the approach detection sensors 7 and 7, the work of grasping the garbage other than the vicinity of the carry-in gate 15 or the work of putting the waste into the hopper 3 is assigned to the next crane work schedule.

Since the time required from the garbage loading operation by the trash loading crane 4 to the hoisting is usually 2 to 3 minutes, the opening and closing of a loading door (not shown) provided at the garbage loading port 1A of the loading gate 15 is performed. Regardless, the entry detection sensor 7,
Since the entry of the refuse collection vehicle 6 can be accurately detected at an early timing by the use of 7, the work near the carry-in gate 15 can be removed from the next crane work. Further, even when the garbage charging crane 4 has already started work near the loading gate 15, the work can be interrupted before the lowering operation of the grab bucket 41.

The time from when the garbage collection vehicle 6 enters the entrance gate 15 until the garbage is thrown into the garbage pit 1 and when the garbage collection vehicle 6 leaves the entrance gate 15 is almost constant within a few minutes. At the time when the garbage truck 6 arrives, if the garbage input crane 4 is not performing garbage picking work or is in a situation where it is completed immediately, the garbage in the vicinity of the loading gate 15 is scheduled for the next crane work schedule. A grabbing operation can be assigned. In this case, when the refuse input crane 4 arrives above the refuse input port 1A during the input of refuse by the refuse collection vehicle 6, the grab bucket 41 is lowered to a height that does not interfere with the refuse collection vehicle 6 or the like, and waits. The gate opening detection sensors 9 and 9 detect that the gate 62 of the garbage truck 6 is closed, and the grab bucket 41 of the garbage dumping crane 4 and the garbage inlet of the garbage truck 6 and the entrance gate 15. When the input door or the like provided in 1A does not interfere, the standby state is released, and the work of grasping the garbage near the carry-in gate 15 is restarted. In the normal operation of the garbage charging crane 4, if the amount of grabbing by the grab bucket 41 is small, re-gripping is performed. In order to shorten the time occupied by the charging crane 4, regripping is not performed. In this manner, the operation rate of the crane is increased, and even when the garbage collection vehicle 6 intermittently inputs the garbage by the garbage collection vehicle 6 at the peak time of the garbage introduction without closing the input door. In addition, refuse can be transshipped so that the amount of refuse deposited near the entrance gate 15 is maintained at a constant level.

The drive control of the pressurizing device 13 for injecting high-pressure water, the control of the indicator lamp 14, and the generation of signals for interlocking with the refuse input crane 4 are comprehensively controlled by the operation management system. In addition, independent control devices can be controlled in association with each other.

[0027]

According to the method for breaking a garbage bag of the present invention, high-pressure water is injected toward the garbage introduced into the garbage pit when the garbage is injected from the garbage truck into the garbage pit. You can surely break the garbage bag that has been put in,
When injecting garbage into the garbage pit from the garbage truck, high-pressure water is injected toward the garbage in the garbage pit, so that the garbage bag can be reliably broken. The refuse is easily mixed with the refuse, and the refuse can be easily mixed and stirred by a refuse input crane or the like, so that the refuse can be homogenized and the moisture contained in the refuse can be uniform. By these means, the combustion efficiency of the refuse can be increased, the refuse can be continuously and uniformly burned, and the generation of harmful substances such as dioxin accompanying the incineration of the refuse can be suppressed.

Further, the garbage thrown into the garbage pit from the garbage truck is detected by a sensor, and high-pressure water is injected based on the detection signal to break the garbage bag. The amount of high-pressure water to be generated can be reduced, and the water content in the garbage can be prevented from rising.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a refuse incineration plant that implements a method for breaking a collected garbage bag according to the present invention.

FIG. 2 is an explanatory view showing a state where the garbage truck has entered a carry-in gate.

FIG. 3 is an explanatory diagram showing a state where the garbage truck has entered a carry-in gate and is putting garbage into a garbage pit.

[Explanation of symbols]

 Reference Signs List 1 garbage pit 1A garbage inlet 2 garbage thrown into garbage pit 3 hopper 4 garbage for loading garbage 41 grab bucket 5 control room 6 garbage truck 61 loading platform 62 gate 7 entry detection sensor 8 inclination detection sensor 9 gate opening detection sensor DESCRIPTION OF SYMBOLS 10 Fixed position detection sensor 11 Dust detection sensor 12 Nozzle 13 Pressurizing device 14 Indicator light 15 Loading gate

Claims (2)

[Claims] When garbage collected by a garbage truck is injected into the garbage pit from the garbage truck, high-pressure water is injected toward the garbage introduced into the garbage pit,
A method for breaking a collected garbage bag, wherein the thrown garbage bag is broken. 2. A garbage thrown into a garbage pit from a garbage truck is detected by a sensor, and based on the detection signal,
2. The method of claim 1, wherein high-pressure water is injected.