JPH10288327A - Refuse incineration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to supply stably refuse to an incinerator with small labor and reduce or prevent the generation of harmful substances. SOLUTION: This refuse incineration plant comprises a crane 2 which carries refuse, refuse feeding equipment 3 provided with a hopper 4 and a screw shaft 5 and an incinerator 8. A sticking rod 21 is provided in the hopper while a temperature sensor 15 is provided in a flue 9 of the incinerator. A refuse quantity detection sensor 16 is provided in a refuse emission chute 4 which connects the refuse feeding equipment and the incinerator. The amount of refuse to be supplied to the incinerator is detected with the temperature sensor and the refuse quantity detection sensor. A control device 17 judges whether or not the amount of refuse to be supplied to the incinerator exceeds predetermined regulated value. When it is judged that the refuse supply quantity is decreased than the regulated value, the control device generates a control signal and transmits the turning force of the screw shaft 5 to the sticking rod, thereby moving up and down the rod and resolving a bridge 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse incineration system provided with a dust supply device for feeding refuse such as municipal waste and an incinerator for incinerating refuse fed from the dust supply device.

[0002]

2. Description of the Related Art FIG. 2 shows a control flow of a conventionally known refuse incinerator. As shown in FIG. 1, refuse 1 such as municipal waste stored in a refuse pit (not shown) is put into a hopper section 4 of a dust feeding device 3 by a crane 2. The dust supply device 3 sends the dust received in the hopper 4 to the discharge port 6 side by rotation of a screw shaft 5 provided at the bottom of the hopper 4, and discharges the dust discharged from the discharge port 6 to a discharge chute. And put into an incinerator 8 via. The refuse introduced into the incinerator 8 is burned by combustion air supplied from a not-shown forced blower. The exhaust heat generated by the combustion is guided to an exhaust heat recovery device (not shown) through the flue 9 and is effectively used for power generation and the like. Further, the combustion exhaust gas is separated into ash and exhaust gas by a dust collector (not shown) provided in the flue 9 and each is discharged out of the system.

Since the hopper 4 has a shape in which the upper part is wide and the lower part is narrow, the narrowest part (throat part) 4a is called a "bridge" 1a depending on the amount and properties of the introduced refuse. May occur. When the bridge 1a is generated in the throat 4a, the supply of the refuse 1 to the incinerator 8 is cut off, so that the calorific value in the incinerator 8 is reduced and the operation of the exhaust heat recovery device becomes difficult, or after the bridge is removed. The waste supply to the incinerator 8 becomes excessive due to the falling off of the garbage, and the amount of air in the incinerator 8 becomes insufficient. More likely to occur.

[0004] In the conventional waste incineration equipment, as shown in FIG.
An ITV (Industrial Television Camera) 10 is provided on the side to determine whether or not the amount of waste input to the hopper unit 4 is appropriate, and the supply of waste from the dust supply device 3 to the incinerator 8 is performed properly. The bridge 1a is generated in the throat portion 4a when the amount of waste input to the hopper portion 4 becomes excessive or the supply of waste from the dust supply device 3 to the incinerator 8 is interrupted. The worker rushes to the hopper section 4 and breaks the bridge 1a with a stick, etc.
The method of securing the supply of refuse to the country is adopted.

A well-known example of a refuse incinerator equipped with a mechanical bridge removing means is disclosed in Japanese Patent Application Laid-Open No. 59-1385.
No. 91, JP-A-3-38531, JP-A-6-
313533, and the like.

[0006]

However, the above-mentioned conventional refuse incineration equipment uses the bridge 1a by the ITV10.
Since the worker goes to the site and performs the work of removing the bridge 1a after the occurrence of the bridge 1a is detected, the removal of the bridge 1a is easily delayed, and the worker breaks down the bridge 1a with a stick or the like. It is difficult to remove efficiently. Therefore, it is difficult for the conventional refuse incineration equipment to stably supply refuse to the incinerator 8, and there is a problem that various inconveniences as described above are likely to occur. Further, after the occurrence of the bridge 1a is detected, the worker goes to the site and uses a
There is also a problem that the burden on the operator is large because the removal work is performed.

[0007] The present invention has been made to solve the disadvantages of the prior art, and an object thereof is to enable stable supply of refuse to an incinerator with low labor.
An object of the present invention is to provide a refuse incineration facility capable of reducing or preventing the generation of harmful substances.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a waste incinerator having a dust hopper and an incinerator for incinerating waste supplied from the dust hopper. In the equipment, a device is provided as a bridge removing means of the dust hopper, which converts a rotational force of a screw shaft provided in the dust feeding device into a vertical driving force of a bridge removing push rod to remove a bridge.

If the dust hopper is provided with a push rod driven by a mechanical force, the bridge removing means can be driven immediately when the occurrence of the bridge is detected, so that the bridge can be removed quickly. It can be performed efficiently. Therefore, it is possible to stabilize the supply of refuse to the incinerator, to improve the efficiency of heat recovery by the exhaust heat recovery device, and to eliminate or reduce the generation of harmful substances. In addition, since the bridge can be removed by mechanical force, the burden on the operator can be reduced. Furthermore, when the pushing rod for removing the bridge is driven by using the rotating force of the screw shaft provided in the feeding device, a special driving device for driving the pushing rod is not required. And complication can be suppressed.

[0010] It is also possible to provide a dust removal device in the dust supply device and / or the incinerator, and to automatically drive the bridge removing device when the dust removal is detected by the dust removal detection device. . In addition to the above-mentioned ITV, a temperature sensor for measuring the gas temperature in the flue, a sensor for detecting the amount of waste passing through the waste discharge chute connecting the dust supply device and the incinerator, A pressure density detection sensor that detects the pressure density of dust in the device,
A torque measuring device for detecting a torque value acting on a screw shaft, an ammeter for measuring a current value applied to a motor for driving a screw shaft, or the like can be used.

When the driving of the bridge removing means is automated, the removal of the bridge can be further speeded up, and the burden of monitoring the occurrence of the bridge can be greatly reduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a refuse incineration plant according to the present invention. In this figure, 15 is a temperature sensor for measuring the gas temperature in the flue 9, 16 is a waste amount detection sensor for detecting the amount of waste passing through the waste discharge chute 7, 1
Reference numeral 7 denotes a control device for the on-off valve 14, reference numeral 21 denotes a pushing rod, and reference numeral 22 denotes a driving mechanism of the pushing rod 21. The drive mechanism 22 is connected to the first shaft connected to the screw shaft 5 via the power transmission member 23.
, A second drive shaft 26 to which a cam plate 25 is attached, and a clutch device 27 provided between these two shafts. For other parts, see Figure 2 above.
Therefore, the corresponding portions are denoted by the same reference numerals and description thereof is omitted.

In the refuse incineration equipment of this embodiment, the amount of refuse supplied to the incinerator 8 is detected by the temperature sensor 15 and the refuse detection sensor 16, and the amount of refuse supplied to the incinerator 8 is determined in advance by the control device 17. When it is determined that the torque has decreased below the specified value, the control device 17 generates a control signal to connect the clutch device 27, and the rotation of the screw shaft 5 is controlled by the power transmission member 23, the first drive shaft 24, and the clutch device. 27, transmitted to the cam plate 25 via the second drive shaft 26, and attached to the vicinity of the throat of the hopper 4 so as to be able to move up and down, and the leading end drives the push rod 21 inserted into the hopper 4. It is characterized by the following. Also in this case, it is possible to determine the presence or absence of the bridge by referring to the image data captured by the ITV 10 and control the driving of the push rod 21.

The tip of the push rod 21 has a bridge 1a.
When the torque of the screw shaft 5 is transmitted, it reciprocates up and down with the rotation of the cam plate 25 to break the bridge 1a. Therefore, by repeating such an operation a plurality of times, the bridge 1a generated in the throat 4a
Can be removed.

In the refuse incineration facility of this embodiment, the refuse detection means such as the temperature sensor 15 and the refuse detection sensor 16 and the control device 17 detect the refuse in the incinerator 8 and drive the damper 11 to drive the bridge 1a. Is removed, the removal of the bridge 1a can be started simultaneously with the detection of the occurrence of the bridge 1a, and the removal of the bridge 1a can be performed quickly and efficiently. Therefore, the supply of refuse to the incinerator 8 can be stabilized, the efficiency of heat recovery by the exhaust heat recovery device, and the elimination or mitigation of harmful substances can be achieved. Further, since the work of removing the bridge 1a is performed by mechanical force, the burden on the operator can be reduced. Further, since the pushing rod 21 for removing the bridge is driven by using the rotational force of the screw shaft 5 provided in the feeding device 3, it is necessary to provide a special driving device for driving the pushing rod 21. Therefore, the size and complexity of the dust supply device can be suppressed.

In the first and second embodiments, the temperature sensor 15, the dust detection sensor 16 and the
Although the amount of refuse supplied to the incinerator 8 is detected from the image data captured by the TV 10, the amount of refuse supplied to the incinerator 8 can be detected by using other waste detection means. Other waste detection means include a pressure density detection sensor that detects the pressure density of the dust in the dust feeder, a torque measuring device that detects a torque value acting on the screw shaft, and a current applied to the screw shaft driving motor. An ammeter or the like that measures the value can be raised.

Further, in the above-described embodiment, the push rod is used as the bridge removing means.
A stirring member for stirring dust in the hopper 4 can be used.

Further, in the second embodiment, the first
A clutch device 27 is provided between the drive shaft 24 and the second drive shaft 26, and only when the bridge 1a occurs,
1 is driven, the clutch device 27 may be omitted and the push rod 21 may be driven at all times. In this way, the generation of the bridge 1a can be prevented beforehand, so that the stable supply of the refuse 1 to the incinerator 8 can be further improved.

[0019]

As described above, according to the present invention,
Since the hopper is provided with a bridge removing means such as a damper or a push rod driven by mechanical force, the bridge removing means can be driven immediately when the occurrence of a bridge is detected, and the bridge can be removed. Can be quickly and efficiently removed. Therefore, it is possible to stabilize the supply of refuse to the incinerator, to improve the efficiency of heat recovery by the exhaust heat recovery device, and to eliminate or reduce the generation of harmful substances. In addition, since the bridge can be removed by mechanical force, the burden on the operator can be reduced. Further, since the pushing rod for removing the bridge is driven by using the rotating force of the screw shaft provided in the feeding device, it is not necessary to provide a special driving device for driving the pushing rod. The size and complexity of the dust device can be suppressed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a waste incineration facility according to an embodiment.

FIG. 2 is a configuration diagram of a waste incineration facility according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust 1a Bridge 2 Crane 3 Dust feeding device 4 Hopper part 4a Throat part 5 Screw shaft 6 Dust discharge port 7 Dust discharge chute 8 Incinerator 9 Chimney 10 ITV (industrial television camera) 11 Damper 15 Temperature sensor 16 Dust amount Detection sensor 17 Control device 21 Thrust rod 22 Thrust rod drive mechanism 22 Power transmission member 24 First drive shaft 25 Cam plate 26 Second drive shaft 27 Clutch device

Claims (2)

[Claims] 1. A waste incineration facility comprising a dust feeding device having a waste hopper and an incinerator for incinerating waste supplied from the dust feeding device, wherein the dust feeding device is used as a bridge removing means for the waste hopper. A refuse incineration plant characterized in that a device for converting the rotational force of the screw shaft provided in the above into a vertical driving force of a bridge removing push rod and removing the bridge is provided. 2. The waste incineration plant according to claim 1, wherein said dust supply device and / or the incinerator is provided with waste detection means, and said bridge removal is performed when said waste detection means detects waste. A refuse incineration plant characterized by automatically driving the means.