JPH11281031A - Waste supplying apparatus and method for combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate time delay in the control of the supply quantity of waste based on a value obtained by enabling accurate determination of the supply quantity of the waste. SOLUTION: An angle of inclination of a flapper 23 vertically oscillating according to changes in the height of garbage 3 fed by a screw type feeder 17 is detected to determine the quantity of the garbage 3 from the angle of inclination detected and the feed speed of the screw type feeder 17 is increased or decreased based on the results. As a result, at the stage prior to the combustion of the garbage 3 in an incinerator, the feed speed of the screw type feeder 17 is controlled based on the supply quantity of the garbage 3 determined in the supply path 16 of the screw type feeder 17 thereby eliminating the time delay in the control of the supply quantity of the garbage 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a supply device and a supply method for supplying waste to a combustion device.

[0002]

2. Description of the Related Art Generally, in order to supply refuse to a fluidized bed refuse incinerator which is a type of refuse incinerator, a refuse supply device such as a screw type feeder is usually used. When supplying refuse using such a feeder, the refuse is crushed in advance to a predetermined size or less, but the amount of refuse suddenly increases, causing `` garbage falling off '' The bed oxygen concentration fluctuated greatly, and as a result, a large amount of unburned components remained in the combustion exhaust gas, and harmful substances were discharged into the atmosphere.

As a countermeasure against this, Japanese Patent Publication No. 5-51815
As shown in the publication, a primary blower for supplying primary air to a fluidized bed refuse incinerator to flow a fluidized medium of a fluidized bed, a secondary blower for supplying secondary air to a free boat, A dust supply device that supplies incineration materials such as refuse into a fluidized bed refuse incinerator, an exhaust gas oxygen concentration detection sensor that detects the oxygen concentration in the exhaust gas, and a hearth oxygen concentration that detects the oxygen concentration in the hearth A detection sensor, a brightness detection sensor for detecting brightness in the furnace, and a secondary air amount from the secondary blower are adjusted by a detection signal of the exhaust gas oxygen concentration detection sensor to set the oxygen concentration in the exhaust gas to a predetermined value. And a secondary air control system for controlling the
A correction control system that corrects the detection time delay of the exhaust gas oxygen concentration detection sensor based on the detection signal of the brightness detection sensor is added. In addition to this, the feed control is performed so that the hearth oxygen concentration and the brightness become predetermined values. An input amount control system for controlling the amount of refuse supplied from the apparatus is provided.

[0004] According to this, Japanese Patent Publication No. 5-51815
In the publication, the supply amount of the secondary air and the input amount (supply amount) of the refuse are controlled based on the detection times of the brightness detection sensor and the hearth portion oxygen concentration detection sensor. The detection sensor detects the brightness at the time of secondary combustion of the combustion gas generated by the combustion of the refuse, and similarly, the hearth oxygen concentration detection sensor detects the oxygen concentration after the refuse is burned. Therefore, even if the brightness detection sensor and the hearth portion oxygen concentration detection sensor are used, the control is performed based on the detection information after the supplied refuse is once burned, and it takes time to control the refuse supply amount. However, there is a problem that a temporary delay occurs.

As a method for eliminating such a time delay in controlling the supply amount, for example, there is a method disclosed in Japanese Patent Application Laid-Open No. 3-279704. According to this, a chute for supplying waste from a dust collector to an incinerator is provided with a supply amount measuring device using a photoelectric switch. Then, the supply amount of the waste is adjusted based on the measurement value of the supply amount measurement device, and the flowing air and the secondary air are adjusted.

According to this, at a stage before the waste is burned, the amount of the waste falling on the chute is measured and the supply of the waste is adjusted, so that the supply of the waste is controlled. The time delay at the time of is eliminated.

[0007]

However, in the above-mentioned conventional type, the number of times of falling of the garbage is detected, but it is possible to accurately grasp the size of the falling of each garbage. There was a problem that it could not be done. On the other hand, it is also proposed to provide an imaging device such as a camera above the refuse supply device and monitor and record the image of the refuse supply state from above with this imaging device, and perform image processing. It is difficult to accurately detect the amount of refuse supplied, and there is a problem in that image analysis is complicated because the fall of refuse can be grasped only by the size of the surface.

SUMMARY OF THE INVENTION It is an object of the present invention to accurately determine a supply amount of waste and to eliminate a time delay in controlling the supply amount of waste based on the obtained value.

[0009]

In order to achieve the above object, a waste supply apparatus for a combustion apparatus according to the first aspect of the present invention comprises:
A supply device for supplying waste to the combustion device, a supply device for sending waste to the combustion device is provided in a supply passage communicating with the combustion device, and an upper portion of the supply passage is provided with the supply device. A detection plate for detecting the amount of waste to be sent is provided, and the detection plate is configured such that its free end faces downstream from the swing center and comes into contact with the waste to be sent out from above, thereby causing the detection plate to move up and down. An angle detecting device that can swing in the direction and detects the inclination angle of the detection plate, and increases or decreases the feed speed of the feeder according to the inclination angle of the detection plate detected by the angle detection device. And a control unit for performing the control.

[0010] According to this, when the amount of waste sent by the feeder increases or decreases, the height of the waste fluctuates up and down in response to the increase or decrease. Is displaced in the vertical direction, and the inclination angle of the detection plate changes.
The change in the inclination angle of the detection plate is detected by the angle detection device, and the amount of waste is obtained from the inclination angle of the detection plate detected by the angle detection device.

When the amount of waste thus obtained is large, the feed rate of the feeder is reduced to reduce the amount of waste supplied, and a large amount of waste is supplied to the combustion device at one time. And the combustion of waste in the combustion device is stabilized.

Conversely, when the amount of waste determined from the inclination angle of the detection plate is small, the feed rate of the waste is increased by increasing the feed rate of the feeder, and the waste is supplied to the combustion device. It is possible to prevent the amount of waste to be sharply reduced, and the combustion of the waste in the combustion device is stabilized.

As described above, the vertical change of the height of the waste is detected by the inclination angle of the detection plate, and the supply amount of the waste is obtained from the detected inclination angle. Therefore, the supply amount of the waste is accurately detected. I can do it. In addition, at a stage before the waste is burned, since the feed rate of the feeder is controlled based on the amount of the waste supplied in the supply passage,
The time delay in controlling the supply of waste is eliminated.

In the waste supply apparatus for a combustion apparatus according to the second invention, the free end of the detection plate is located at the outlet of the supply passage. According to this, the vertical fluctuation of the height of the waste at the outlet of the supply passage is detected by the inclination angle of the detection plate, so that a more accurate waste supply amount is obtained.

In the waste supply apparatus for a combustion apparatus according to the third aspect of the present invention, the free end of the detection plate is urged downward by urging means. According to this, the free end of the detection plate presses the upper surface of the waste sent by the feeder from above to below with a constant force by the urging force of the urging means. For this reason, the space existing in the waste is buried, and the range of the variation in the bulk specific gravity of the waste is narrowed and uniformized. As a result, a more accurate waste supply amount is required.

The waste supply apparatus of the combustion apparatus according to the fourth invention uses a fluidized bed incinerator as a combustion apparatus and a screw feeder as a supply apparatus.

According to this, when the amount of dust sent by the screw type feeder increases or decreases, the height of the dust changes up and down correspondingly, so that the free end of the detection plate is changed by the amount of the change. The tilt angle of the detection plate changes due to displacement in the vertical direction. Then, the amount of dust is obtained from the inclination angle of the detection plate detected by the angle detection device.

If the amount of waste determined in this way is large, the feed rate (revolution) of the screw type feeder is reduced, so that the amount of waste supplied is reduced. It can be prevented from being supplied to the refuse incinerator.

Conversely, when the amount of dust obtained from the inclination angle of the detection plate is small, the feed rate (rotation speed) of the screw type feeder is increased to increase the amount of dust supplied. It is possible to prevent the amount of refuse supplied to the refuse incinerator from suddenly decreasing.

In the waste supply apparatus for a combustion apparatus according to the fifth aspect of the present invention, the pitch of the screws of the screw feeder is increased toward the outlet side of the supply passage from the inlet side.

According to this, it is possible to prevent the waste that has entered a predetermined amount from the inlet side from being clogged at the outlet side. The waste supply method of the combustion device according to the sixth aspect of the present invention includes:
A method for supplying waste to a combustion device, comprising detecting a tilt angle of a detection plate that swings up and down due to a change in height of the waste sent out by the feeder, and detecting the tilt angle. The feed speed of the feeder is increased or decreased based on the feed speed.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 4, reference numeral 1 denotes a fluidized-bed incinerator as an example of a combustion apparatus, in which heat-resistant particles such as silica sand are filled as a fluid medium 2 and fluidized by high-pressure air. The waste 3 (an example of waste) is dried and burned in the fluidized medium 2 that has been made.

The refuse incinerator 1 has a fluidized bed 4 inside.
And a primary combustion chamber 5 and a secondary combustion chamber 6 are formed.
A primary air (fluidized air) supply unit 7, a secondary air supply nozzle 8, a combustion gas outlet 9, an oxygen concentration measuring device 12, and a carbon monoxide concentration measuring device 13 are provided.

The refuse 3 is supplied into the refuse incinerator 1 by a dust supply device 14 (an example of a supply device), and the refuse supply device 14 and the refuse incinerator 1 are connected via a refuse inflow passage 11. ing.

[0025] As shown in FIG.
A waste hopper 15 for temporarily storing the waste 3, a lateral waste supply passage 16 communicating from a lower portion of the waste hopper 15 to the waste inflow passage 11 of the waste incinerator 1, and a waste supply passage 16 provided in the waste supply passage 16. And a twin-screw feeder 17 (an example of a feeder) that feeds the waste 3 from the waste hopper 15 to the waste inflow passage 11.

As shown in FIGS. 1 and 3, the screw-type feeder 17 has two parallel horizontal rotation shafts 18.
a, 18b, screws 19a, 19b that rotate about these rotation shafts 18a, 18b, and a rotation drive device 20 that rotates these rotation shafts 18a, 18b in directions F opposite to each other. The pitch P of the screws 19a and 19b is wider on the outlet 22 side of the dust supply passage 16 than on the inlet 21 side.

A plurality of flappers 23 and 24 (an example of a detection plate) for detecting the amount of the refuse 3 sent by the screw type feeder 17 are provided on the upper side in front of the outlet 22 in the refuse supply passage 16. Have been. Each of the above flappers 23,
Each of the flappers 24 has a free end that is directed downstream from the swing center and contacts the refuse 3 to be sent out from above, and is swingable in the vertical direction.
Are located above the outer sides of both screws 19a, 19b, and a central flapper 24 provided between both side end flappers 23 is located above between both screws 19a, 19b. Each of the flappers 23 and 24 is a triangular plate material whose width is narrower toward the free end (lower part).
The free ends 3 and 24 are located at the outlet 22 of the waste supply passage 16.

The both-side end flapper 23 is a first flapper 23 that is orthogonal to the refuse delivery path 26 in the refuse supply passage 16 from the lateral direction.
Similarly, the center flapper 24 is mounted on a second support shaft 28 that is orthogonal to the dust discharge path 26 in the lateral direction. Of these, the second
The support shaft 28 is formed in a tubular shape, and approximately half of the first support shaft 27 is inserted into the second support shaft 28. Further, one side end flapper 23 located on the one screw 19b side is inserted into a notch opening 39 formed in the second support shaft 28 and attached to the first support shaft 27. The first and second support shafts 27 and 28 are supported by a frame 29 of the dust feeding device 14 so as to be rotatable about the same axis. The center of swinging between the both end flapper 23 and the center flapper 24 is the first and second support shafts 2.
7, 28 coincide with the axis.

At the end of the first support shaft 27, there is provided a first encoder 31 (an example of an angle detection device) for detecting the inclination angle α of the both end flapper 23 from the rotation angle of the first support shaft 27. Similarly, at the end of the second support shaft 28, a second encoder 32 (angle detection device) for detecting the inclination angle α of the central flapper 24 from the rotation angle of the second support shaft 28 Is connected.

Further, the amount of the dust 3 passing through the dust supply passage 16 is obtained in the dust supply device 14 based on the detection values detected by the first and second encoders 31 and 32, and the rotation drive device 20 is provided. To control the screw feeder 1
7 is provided with a control unit 34 for increasing or decreasing the feed speed (ie, the number of rotations of the rotating shafts 18a and 18b).

That is, as shown in FIG. 2, based on the inclination angles α of the flappers 23 and 24 detected by the encoders 31 and 32, the dust 3 in the dust supply passage 16 extends from the ceiling 30 of the dust supply passage 16. The distance D to the upper end of the waste is calculated, and the waste 3 based on the bottom of the waste supply passage 16 is determined.
Assuming that the height of the dust 3 is H and the height from the bottom of the dust supply passage 16 to the ceiling 30 is Ha (a constant value), the height H of the dust 3 is obtained by the following equation. H = Ha−D Further, the amount of the refuse 3 passing through the refuse supply passage 16 is calculated based on the height H of the refuse 3 obtained by the above equation.

As shown in FIG. 1, a crusher 35 for breaking up the dust 3 discharged from the outlet 22 of the dust supply passage 16 is provided at the upper end of the dust inflow passage 11. ing. The crusher 35 is provided with the waste inflow passage 11.
A rotating shaft 36 is provided vertically downward in the upper end of the rotating shaft 36, a screw 37 that rotates around the rotating shaft 36, and a rotation driving device 38 that drives the rotating shaft 36 to rotate.

The operation of the above configuration will be described below. The refuse 3 crushed to a certain size or less is temporarily stored in a refuse hopper 15 of a dusting device 14 and is screwed together with both rotating shafts 18a, 18b by a rotation driving device 20 of a screw type feeder 17 to screws 19a, 19b. Are rotated in directions F opposite to each other, so that the refuse 3 is discharged from the refuse hopper 15 through the refuse supply passage 16 to the outlet 2.
2 is discharged into the dust inflow passage 11.

At this time, as shown in FIG. 2, as the amount of the refuse 3 increases, the height H (rise) of the refuse 3 in the refuse supply passage 16 increases. Therefore, when the amount of the refuse 3 sent by the screw type feeder 17 increases, the height H of the refuse 3 correspondingly increases, and the free end of the side end flapper 23 moves upward by an amount corresponding to the rise. As a result, the inclination angle α of the side end flapper 23 decreases, and the first support shaft 27 rotates according to the change in the inclination angle α.

Conversely, when the amount of dust 3 sent by the screw type feeder 17 is reduced, the height H of the dust 3 is correspondingly lowered, and the free end of the side end flapper 23 is reduced by the reduced amount. The portion is displaced downward, the inclination angle α of the side end flapper 23 increases, and the first support shaft 27 rotates according to the change of the inclination angle α.

As described above, the tilt angle α of the side end flapper 23 is detected and detected by the first encoder 31 based on the rotation of the first support shaft 27 in accordance with the increase or decrease of the amount of dust 3. The height H of the dust 3 is obtained from the inclination angle α of the side end flapper 23, and the amount of the dust 3 is finally obtained from the height H of the dust 3.

When the amount of the refuse 3 obtained in this way is large, the control unit 34 controls the rotary drive unit 20 to reduce the rotation speed of both rotary shafts 18a and 18b. Thereby, the feed speed of the screw type feeder 17 is reduced, and the supply amount of the dust 3 from the outlet 22 to the dust inflow passage 11 is reduced. Thereby, it is possible to prevent a large amount of refuse 3 from being supplied to the fluidized bed refuse incinerator 1 at a time (dropping of refuse), and combustion of the refuse 3 in the refuse incinerator 1 is stabilized.

Conversely, the inclination angle α of the side end flapper 23
If the amount of the refuse 3 obtained from the above is small, the control unit 34
Controls the rotation drive device 20 to control both rotation shafts 18a, 18b.
Increase the number of revolutions. As a result, the feed speed of the screw type feeder 17 is increased, and the supply amount of the dust 3 from the outlet 22 to the dust inflow passage 11 is increased. Thereby, it is possible to prevent the amount of the refuse 3 supplied to the fluidized bed refuse incinerator 1 from suddenly decreasing, and the refuse 3 in the refuse incinerator 1 can be prevented.
Stabilizes combustion.

As described above, the vertical fluctuation of the height H of the dust 3 is detected by the inclination angle α of the side end flapper 23, and the supply amount of the dust 3 is obtained from the detected inclination angle α. Can be accurately grasped. Further, since the feed rate of the screw type feeder 17 is controlled based on the supply amount of the refuse 3 obtained in the refuse supply passage 16 at a stage before the refuse 3 is burned, the supply of the refuse 3 is performed. The time delay in controlling the quantity is eliminated.

As described above, usually, the side end flapper 2
The screw type feeder 17 has an inclination angle α of only three.
The center flapper 24 operates in the same manner as the side end flapper 23 described above. On this occasion,
As shown in FIG. 3, the swelling of the refuse 3 sent out by the screw type feeder 17 occurs first on the side A of the both-side end flapper 23, and then on the side B of the central flapper 24.
Occurs late. Therefore, only when the inclination angle α of the central flapper 24 becomes equal to or less than the predetermined angle, the control unit 34 reduces the feed speed of the screw-type feeder 17 more quickly than at the time of detection by the side end flapper 23. I do. As a result, the central flapper 24 can detect an extreme "dust 3 drop" that cannot be quickly dealt with by the both end flapper 23.

Further, as shown in FIG.
Since the free ends of the refuse 3 and 24 are located at the outlet 22 of the refuse supply passage 16, the vertical fluctuation of the height H of the refuse 3 at the outlet 22 is detected by the inclination angle α of each of the flappers 23 and 24. Therefore, a more accurate supply amount of the waste 3 is required.

As shown in FIG. 1, the pitch P of the screws 19a and 19b of the screw type feeder 17 is wider on the outlet 22 side than on the inlet 21 side of the refuse supply passage 16. It is possible to prevent dust 3 that has entered a certain amount from the side from being clogged at the outlet 22 side.

When the screw 37 is rotated about the rotating shaft 36 by the rotation driving device 38 of the crusher 35, the dust 3 is discharged from the outlet 22 of the screw type feeder 17 when the dust 3 is discharged. It is loosened by the screw 37 and supplied to the refuse incinerator 1. Thereby, the lump of the refuse 3 can be eliminated to some extent.

FIG. 5 is a schematic diagram showing two rotation shafts 18a and 18 of the screw type feeder 17 based on the data obtained in the experiment.
The relationship between the rotation speed of b, the distance D to the refuse 3, and the contents of CO (carbon monoxide) and O ₂ (oxygen) in the combustion exhaust gas discharged from the refuse incinerator 1 is shown for each time. It is a graph.

The above experiment was performed under the following conditions. That is, the refuse 3 used was dried, and its moisture content was about 10%. In addition, the supply amount of waste 3 is nominally 35
The oxygen content in the exhaust gas of the refuse incinerator 1 is set to 9% when the pressure is set to 0 kg / hour (the rotation speeds of both rotating shafts 18a and 18b of the screw feeder 17 at this time are 50 times / minute). The supply amounts of primary air (fluidized air) and secondary air were determined. Further, an average value of the inclination angle α of the side end flapper 23 detected by the first encoder 31 for 5 seconds is calculated, and based on the average value, the two rotating shafts 18a,
The rotation speed of 18b was controlled.

As shown in the graph (a) of FIG. 5, the distance D to the dust 3 detected by the swing of the side end flapper 23 fluctuates up and down in the range of the first half Xa. When the rotation speeds of both rotating shafts 18a and 18b are kept constant (50 times / minute), the supply amount of the refuse 3 to the refuse incinerator 1 becomes unstable, and as shown in the graph (b), the first half Xb In the range, a defect such as appearance of several peaks Q of CO occurred.

On the other hand, as shown in the graph (a), when the distance D to the dust 3 detected by the swing of the side end flapper 23 increases in the range of the latter half Ya (see FIG. 2). When the height H of the refuse 3 is reduced as shown in FIG. 3), the number of rotations of the rotating shafts 18a and 18b is increased, and when the distance D to the refuse 3 is decreased (that is, when the When the height H rises), the two rotating shafts 1
When the control of reducing the number of rotations of the refuse 8a, 18b is performed, the supply amount of the refuse 3 to the refuse incinerator 1 is stabilized,
As shown in the graph (b), in the range of the latter half Yb,
It was confirmed that the content of CO was reduced and peak Q hardly occurred.

In the above embodiment, as shown in FIG.
Although both end flappers 23 and the central flapper 24 are provided, only one of the flappers (23 or 24) may be provided.

In the above-described embodiment, the pitch P of the screws 19a and 19b of the screw feeder 17 is increased toward the outlet 22 side of the dust supply passage 16 as compared with the inlet 21 side. As an embodiment, as shown in FIG. 6, the above-mentioned pitches P may be formed identically.
In this case, the ceiling part 30 of the screw type feeder 17 is formed one step higher on the outlet part 22 side, and the screws 19a, 1
A sufficient upper space 45 is secured between the ceiling 9b and the ceiling 9b. In this way, by securing the upper space 45, it is possible to prevent the dust 3 that has entered a fixed amount from the inlet 21 side from being clogged at the outlet 22 side.

Next, a third embodiment of the present invention will be described with reference to FIG. That is, the above flappers 23, 2
4 is a compression coil spring 48 whose free end is an example of an urging means.
(Or a leaf spring or the like).
According to this, when the free ends of the flappers 23 and 24 contact the upper surface of the dust 3, the biasing force of the compression coil spring 48 presses the dust 3 downward from above.
The space existing inside is buried and the rebound is suppressed.
As a result, the range of variation of the bulk specific gravity of the waste 3 is narrowed and made uniform, and as a result, a more accurate supply amount of the waste 3 is obtained.

In the third embodiment, the compression coil spring 48 is used as an example of the urging means. However, weights are attached to the free ends of the flappers 23 and 24, and
The free ends 3 and 24 may be urged downward.

In the first embodiment, as shown in FIG. 3, a twin screw feeder 17 having two rotating shafts 18a and 18b is used, but a fourth embodiment of the present invention is used. As a form, as shown in FIG. 8, a screw type feeder 1 having one rotation shaft 18 rotating in one direction G
7 may be used. In this case, there is no central flapper 24, one side end flapper 23a is attached to the first support shaft 27, and the other side end flapper 23b is attached to the second support shaft 28.

According to this, normally, the first encoder 31
The rotation speed of the rotating shaft 18 is increased or decreased based on the inclination angle α of the one side end flapper 23a detected by the above. At this time, the swelling of the refuse 3 sent out by the screw type feeder 17 is first caused by one side end flapper 2.
3a occurs on the side A, and then the other side edge flapper 23
Occurs with a delay on the side B of b. For this reason, the control unit 34
Only when the inclination angle α of the other side end flapper 23b becomes equal to or less than a predetermined angle, the one side end flapper 23
The feed speed of the screw type feeder 17 is reduced more quickly than at the time of detection by a. This makes it possible to detect, with the other side end flapper 23b, an extreme "dust 3 drop" that cannot be quickly handled by the one side end flapper 23a.

In each of the first to fourth embodiments, the screw feeder 17 is used as an example of the feeder.
A conveyor type feeder may be used instead of the screw type.

[0055]

According to the first aspect of the present invention, the vertical fluctuation of the height of the waste is detected by the inclination angle of the detection plate, and the amount of the waste supplied is determined from the detected inclination angle. The amount can be accurately detected. In addition, since the feed rate of the feeder is controlled based on the amount of waste supplied in the supply passage at a stage before the waste is burned, the control of the amount of waste supplied is not performed. The time delay at the time is eliminated. As a result, it is possible to immediately respond to a rapid increase or decrease in the amount of waste.
The generation of the peak of the O concentration can be prevented.

According to the second aspect of the present invention, the vertical fluctuation of the height of the waste at the outlet of the supply passage is detected by the inclination angle of the detection plate, so that a more accurate waste supply amount is obtained. .

According to the third aspect of the present invention, the free end of the detecting plate presses the upper surface of the waste sent by the feeder from above to below by the urging force of the urging means. For this reason, the space existing in the waste is buried, and the range of the variation in the bulk specific gravity of the waste is narrowed and uniformized. As a result, a more accurate waste supply amount is required.

According to the fourth aspect of the present invention, when the amount of dust sent by the screw type feeder increases or decreases, the height of the dust fluctuates up and down in response to the increase or decrease. The end is displaced in the vertical direction, and the inclination angle of the detection plate changes. Then, the amount of dust is obtained from the inclination angle of the detection plate detected by the angle detection device.

When the amount of waste determined in this way is large, the feed rate (revolution) of the screw feeder is reduced to reduce the amount of waste supplied, and a large amount of waste can be removed at a time. It can be prevented from being supplied to the refuse incinerator.

On the other hand, when the amount of dust obtained from the inclination angle of the detection plate is small, the feed rate of the screw type feeder (the number of rotations) is increased to increase the amount of dust supplied. It is possible to prevent the amount of refuse supplied to the refuse incinerator from suddenly decreasing.

According to the fifth aspect of the present invention, it is possible to prevent a certain amount of waste entering from the inlet side of the supply passage from being clogged at the outlet side.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of a supply device according to a first embodiment of the present invention.

FIG. 2 is an enlarged side view of the detection plate of the supply device.

FIG. 3 is a view taken in the direction of arrows ZZ in FIG. 1;

FIG. 4 is a cross-sectional view showing a configuration of a refuse incinerator provided with the supply device.

FIG. 5 (a) is a graph showing the number of revolutions of the screw feeder and the distance to the garbage with time, based on data obtained in the experiment. (B) on the basis of the data obtained in the experiment is a graph showing the content of CO and O ₂ in the combustion exhaust gas for each time.

FIG. 6 is a side sectional view showing a configuration of a supply device according to a second embodiment of the present invention.

FIG. 7 is a partially enlarged cross-sectional view showing a configuration of a supply device according to a third embodiment of the present invention as viewed from a side.

FIG. 8 is a view seen from an outlet side of a supply device according to a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fluid bed refuse incinerator (combustion device) 3 Refuse (waste) 14 Dust supply device (supply device) 16 Refuse supply passage 17 Screw type feeder (supply machine) 19, 19a, 19b Screw 21 Inlet 22 Exit 23 , 23a, 23b Side end flapper (detection plate) 24 Central flapper (detection plate) 31, 32 First and second encoders (angle detection device) 34 Control unit 48 Compression coil spring (biasing means) α Inclination angle H Height of garbage P Pitch

Claims (6)

[Claims] 1. A supply device for supplying waste to a combustion device, wherein a supply device for sending waste to the combustion device is provided in a supply passage communicating with the combustion device, and a supply device is provided at an upper portion in the supply passage. A detection plate for detecting the amount of waste sent by the feeder, wherein the free end of the detection plate is directed to the downstream side from the swing center, and the detection plate is positioned above the waste to be sent out. Swinging up and down by contact from
An angle detection device that detects an inclination angle of the detection plate,
A waste supply device for a combustion device, comprising: a control unit that increases or decreases the feed speed of the supply device in accordance with the inclination angle of the detection plate detected by the angle detection device. 2. The waste supply device for a combustion device according to claim 1, wherein the free end of the detection plate is located at an outlet of the supply passage. 3. The waste supply apparatus for a combustion apparatus according to claim 1, wherein the free end of the detection plate is urged downward by an urging means. 4. The combustion apparatus according to claim 1, wherein a fluidized bed incinerator is used as the combustion apparatus, and a screw feeder is used as the feeder. Waste supply equipment. 5. The waste supply device for a combustion device according to claim 4, wherein the pitch of the screw of the screw type feeder is increased toward the outlet side of the supply passage from the inlet side. 6. A method for supplying waste to a combustion device, comprising detecting an inclination angle of a detection plate that swings up and down due to a change in height of the waste sent out by the supply device. A feed rate of the feeder is increased / decreased based on the tilt angle obtained.