JPH0439508A - Refuse feeding device for refuse incinerator - Google Patents

Abstract

PURPOSE:To supply a suitable amount of refuse to a drying stoker for sure in a suitable quantity according to the quality of the refue by arranging a push-out device below a hopper chute and a refuse sensor in its upper section and at the same time providing a controller which controls the push-out device. CONSTITUTION:A push-out device 57 is provided below a hopper chute 45 and a refuse sensor 59 in its upper section, and at the same time a controller 61 is provided which controls the push-out device 57 so as to bring the weight of the refuse near to a rated weight. The push-out device 57 is constituted of an upper push-out device 65 which moves from the rear end section of the hopper chute 45 to its front with a specified stroke and the lower push-out device 67 the front end of which moves with almost the same stroke as that of the upper side push-out device 65 from a specified position to near a stoker 47. With this arrangement it is possible to adjust the strokes of the upside push-out device 65 and lower side push-out device 67 according to the largeness or smallness of the weight of the refuse against the rated weight and supply for sure a suitable amount of refuse to a drying stoker 47 according to the quality of the refuse.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dust supply device for a waste incinerator, and in particular controls the volume of waste supplied to a drying stoker according to the quality of the waste,
This invention relates to a dust supply device for a garbage incinerator that supplies a certain weight of garbage.

[Conventional technology]

Generally, combustible garbage discharged from households is collected and disposed of by incineration in a garbage incinerator.

Such a garbage incinerator generally includes a hopper to which garbage is supplied by a garbage crane, a hopper chute that guides the garbage from this hopper, a dust supply device that supplies the garbage in this hopper chute to a drying stoker, and a dust supply device that supplies the garbage to a drying stoker. A combustion stoker that burns the waste from the dry stoker, and a post-combustion stoker that burns the waste in a bonfire.

In order to ensure smooth processing using dry stokers, combustion stokers, etc., conventional dust supply devices are controlled depending on the type of waste.
It is practiced to supply a constant weight of waste to the drying stoker.

This means that if the same volume of waste is supplied when the waste quality is poor and good, the drying stoker and combustion stoker will be covered with a thick layer if the waste quality is poor, and the drying stoker will not be able to dry the waste sufficiently. This is because there is a large amount of unburned material because it is not sufficiently combusted by the combustion stoker.Also,
If the quality of the garbage is good, it will be spread thinly on the drying stoker and the combustion stoker, and the drying stoker will burn it and turn it into ash.The hard-to-burn garbage will be buried in the ash and will not be burned in the combustion stoker. This is because there will be a lot of unburned material. Therefore, in order to efficiently incinerate waste by eliminating unburned materials in the waste incinerator, it is necessary to control the thickness of the waste in the drying stoker and the combustion stoker depending on the quality of the waste.

Here, when the quality of garbage is poor, we mean, for example, garbage that contains moisture, garbage with a lot of kitchen waste, and garbage such as books that do not allow air to pass through, and when the quality of garbage is good, for example, Refers to garbage such as vinyl 1 paper, etc.

As a dust supply device for such a waste incinerator, for example, one disclosed in Japanese Patent Application Laid-Open No. 63-58012 is known.

8 and 9 show a dust supply device for a waste incinerator disclosed in this publication, and in the figures, reference numeral 11
indicates the hopper to which the waste is fed.

A hopper chute 13 is connected to the hopper 1, and a pushing device 17 for pushing the waste toward the drying stoker 15 is arranged below the hopper chute 13.

Further, a garbage receiver 19 that receives the garbage pushed out by the extrusion device 17 is arranged above the drying stoker 15, and when the garbage on this garbage receiver 19 reaches a predetermined weight, the garbage is transferred to the drying stoker 15. It is designed to be inserted into the

In the dust supply device of such a garbage incinerator, the weight of the garbage pushed out by the extrusion device 17 is measured, and the weight of the garbage pushed out by the extrusion device 17 is measured.
It can be put into 5.

In addition, a dust supply device for a garbage incinerator is known, for example, as disclosed in Japanese Unexamined Patent Publication No. 63-21412.

FIG. 10 shows a dust supply device for a waste incinerator disclosed in this publication, and reference numeral 21 indicates a hopper chute.

An extrusion device 23 is arranged below this hopper chute 21. This extrusion device 23 includes an extruder 25 and a cylinder 27 for extruding the extruder 25.

A retaining portion 29 is formed on the lower surface of the extruder 25, and this engaging portion 29 engages with a number of glue mint switches 33 arranged on a sliding portion 31 on which the extruder 25 slides. , the limit switch 33 is activated, and the cylinder 27
The supply of pressure oil to the extruder 25 is stopped, and the stroke of the extruder 25 is adjusted.

In such a dust supply device for a garbage incinerator, by adjusting the stroke of the extruder 25, the amount of extrusion to the drying stoker 35 by the extruder 23 can be adjusted.

[Problems to be Solved by the Invention] However, in the feeding device disclosed in Japanese Unexamined Patent Publication No. 63-58012, as shown in FIG.
The garbage from No. 9 and the garbage from the hopper chute 13 are continuous, and it is unclear what range of garbage weight is being measured in the weight measured by the garbage receiver 19. Depending on the garbage quality, the garbage is supplied to the drying stoker 15. There was a problem in that it was difficult to control the amount of waste being collected.

That is, although it is possible to supply the drying stoker 15 with garbage so as to cover it in a thin layer, it is difficult to spread the garbage to the optimum thickness.

On the other hand, in the dust supply device disclosed in Japanese Patent Application Laid-Open No. 63-21412, as shown in FIG. The problem was that it was not possible to supply the

That is, the tip of the extruder 25 may not move to the tip of the sliding part 31, and in this case, the dirt on the drying stoker 35 side than the extruder 25 may fall onto the drying stoker 35 or not. There was a problem that the desired amount of waste could not be supplied to the drying stoker 35.

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a dust supply device for a waste incinerator that can reliably supply an appropriate amount of waste to a drying stoker depending on the quality of the waste. With the goal.

[Means to solve the problem]

The dust supply device for a garbage incinerator according to claim 1 comprises: a pushing device disposed below a hopper chute that guides garbage and pushing the garbage toward a drying stoker by moving back and forth; and an extrusion device disposed above the hopper chute. A garbage sensor that reacts when the garbage in this part runs out, the time T for which a certain volume of garbage supplied to the hopper by the garbage crane is reduced to the position of the garbage sensor, and the weight G of the constant volume of garbage measured by the garbage crane. is taken in as data and controls the extrusion device so that the weight F of garbage per unit time supplied to the dry stoker approaches the rated weight F0 of the dry stoker, and the extrusion device The device includes an upper extruder whose front end moves a predetermined stroke forward from the rear end of the hopper chute, and an upper extruder which is alternately driven forward with the upper extruder and is disposed below the upper extruder and whose front end moves from a predetermined position. A lower extruder moves almost the same stroke as the upper extruder up to the vicinity of the drying stoker, and the strokes of the upper extruder and the lower extruder are controlled by the control device according to the quality of the waste. It is something.

The dust supply device for a garbage incinerator according to claim 2 is the dust supply device for a garbage incinerator according to claim 1, in which an auxiliary garbage sensor is arranged below the garbage sensor to react when there is no more garbage in that part. That's what happens.

[Function] In the dust supply device for a garbage incinerator according to claim 1, first, as a preliminary step, the upper extruder is moved forward from a state in which the front end of the upper extruder is located at the rear end of the hopper chute. , the waste in the hopper chute is pushed forward so that the waste is located sufficiently closer to the drying stoker than the tip of the lower extruder.

After this, the upper extruder is retracted to its original state, ie, its front end is located at the rear end of the hopper chute.

Next, the lower extruder moves forward from a predetermined position until its front end is located near the drying stoker, and the waste located closer to the drying stoker than the tip of the lower extruder is pushed out of the lower extruder. drop onto a drying stoker.

On the other hand, data on the time T for the fixed volume of waste supplied to the hopper by the waste crane to reduce to the position of the waste sensor and the data on the weight G of the fixed volume of waste measured by the waste crane are taken into the control device and supplied to the drying stoker. The garbage weight F per unit time is derived.

The garbage weight F per unit time is the rated weight F of garbage that is the processing capacity of the dry stoker.

If the amount is greater than the rated weight F of the drying stoker, the control device controls the strokes of the upper extruder and lower extruder to be shorter, so that the garbage weight F per unit time is equal to the rated weight F of the drying stoker. If the stroke of the upper and lower extruders is lengthened (controlled) by the control device.

In other words, if the quality of the waste is poor, the weight F of waste per unit time will be larger than the rated weight F0 of the drying stoker, so in order to reduce the volume of waste extruded by the lower extruder, The extruder stroke is controlled to be short and the drying stoker is laid thin.

In addition, when the waste quality is good, the weight F of waste per unit time is smaller than the rated weight F0 of the drying stoker, so in order to increase the volume of waste extruded by the lower extruder, the upper extruder and the lower The extruder stroke is controlled to be long and the drying stoker is thickly laid.

In the dust supply device for a garbage incinerator according to claim 2, in the dust supply device for a garbage incinerator according to claim 1, an auxiliary garbage sensor is arranged below the garbage sensor, which reacts when there is no more garbage in that part. Therefore, if the part where the dust sensor is located becomes clogged with dust, the dust below it is supplied, and a cavity is created near the auxiliary dust sensor, this condition will be confirmed by the auxiliary dust sensor.

[Example] Hereinafter, an example will be described in which details of the present invention are shown in the drawings.

1 and 2 show a garbage incinerator equipped with the dust supply device of the present invention, and in the figures, reference numeral 41 indicates the garbage incinerator.

This garbage incinerator 41 includes a hopper 43 to which garbage is supplied by a garbage crane (not shown), a hopper chute 45 that guides the garbage from this hopper 43, and a dust supply device that supplies the garbage in the hopper chute 45 to a drying stoker 47. 4
9, a drying stoker 47 for drying the waste, a combustion stoker 50 for burning the waste from the drying stoker 47, and a post-combustion stoker 51.

Dust supply device 49. Dry stoker 47. Combustion stoker 50.
The after-combustion stoker 51 is housed within the furnace body 53,
This furnace body 53 is formed with an exhaust port 55 for discharging combustion gas.

The dust supply device 49 includes an extrusion device 57 that moves back and forth to push out the garbage toward the drying stoker 47 side below the hopper chute 45 that guides the garbage;
A garbage sensor 59 is placed on the top of the hopper 43 and reacts when the garbage in this area is exhausted.
It is composed of a control device 61 which takes in as data the time T for the garbage to decrease to the position 9 and the weight G of a certain volume of garbage measured by the garbage crane.

This control device 61 receives time T and garbage weight G, and based on these data, the garbage weight F per unit time to be supplied to the drying stoker 47 is derived, and this garbage weight F per unit time is supplied to the drying stoker 47. Rated weight F, which is the garbage processing capacity of 47.

The control device 61 controls the extrusion device 57 so that the extrusion device 57 approaches .

Further, the extrusion device 57 includes an upper extruder 65 whose front end moves forward by a predetermined stroke from the rear end 63 of the hopper chute 45, and a lower extruder 67 whose front end moves from a predetermined position to the vicinity of the drying stoker 47. has been done.

The upper extruder 65 and the lower extruder 67 are alternately driven forward, and the upper extruder 65 and the lower extruder 67 move in parallel strokes L, as shown in FIG.

These upper extruder 65 and lower extruder 67 are connected to the rod 6
9 are respectively connected to cylinders 71, and these cylinders 71 are connected to a pressure oil supply device (not shown). The control device 61 controls the stroke L of the upper extruder 65 and the lower extruder 67 by controlling the pressure oil supply device.

Furthermore, as shown in FIG. 1, an auxiliary dust sensor 73 is arranged below the dust sensor 59, which reacts when the dust in that part is gone.

The dust sensor 59 and the auxiliary dust sensor 73 are, for example,
It is constructed by attaching a microwave irradiation device and an input device to opposite positions of the hopper chute 45, and is configured to sense whether or not the microwave is blocked by dust.

In the garbage incinerator configured as described above, garbage is grasped by a garbage crane (not shown) and the weight of the garbage is measured.
This garbage is thrown into the hopper 43.

As a preliminary step, the garbage in the hopper chute 45 is first moved from the state shown in FIG. 4 to the side of the garbage 75 as shown in FIG. 5 by moving the upper pusher 65 forward. , the front surface of the waste 75 indicated by the dashed line in FIG. As shown in FIG. 6, the upper extruder 65 is moved back so that its tip is located at the rear end of the hopper chute 45.

Next, as shown in FIGS. 6 and 7, the lower extruder 6
7 is moved from a predetermined position to a portion where its tip is located near the drying stoker 47, and the garbage 75 located closer to the drying stoker 47 than the tip of the lower extruder 67 is moved, that is, as shown in FIG. The dirt 75 in the diagonally shaded area closer to the drying stoker 47 than the one-dot chain line falls onto the drying stoker 47, as shown in FIG.

Thereafter, the lower extruder 67 is pulled to a predetermined position, as shown in FIG. 4, and repeats the movements shown in FIGS. 4 to 7.

The garbage 75 that has fallen onto the drying stoker 47 is spread over the drying stoker 47 to a predetermined thickness, and the air from below the drying stoker 47 and the combustion heat from the combustion stoker 50 cause the garbage 75 on the drying stoker 47 to 75 is dried and fed to the combustion stoker 50. This combustion stoker 5
0, is supplied to the after-combustion stoker 51, and the waste 7
5 is completely burned.

On the other hand, the time T during which a certain volume of garbage 75 supplied to the hopper 43 by the garbage crane is reduced to the position of the garbage sensor 59
Then, the data of the weight G of a certain volume of garbage measured by the garbage crane is taken into the control device 61, and the weight F of garbage per unit time to be supplied to the drying stoker 47 is derived. The garbage weight F per unit time is F=Gx60
/T. Here, F (kg), G (kg
), T (seconds).

If the garbage weight F per unit time is greater than the rated weight F0 of the garbage 75, which is the preset processing capacity of the drying stoker 47, the control device 61 controls the upper extruder 65 and the lower extruder 67. The stroke L of the drying stoker 4 is short (controlled, and the garbage weight F per unit time is
7, the control device 61
As a result, the strokes of the upper extruder 65 and the lower extruder 67 are controlled to be long. Here, the unit of rated weight F0 is kg/
h, and Fo is set in advance in the control device 61.

That is, when the quality of the waste is poor, the specific gravity is large and the weight F of the waste per unit time is equal to the rated weight F0 of the drying stoker 47.
Therefore, in order to reduce the volume of waste extruded by the lower extruder 67, the strokes of the upper extruder 65 and the lower extruder 67 are controlled to be short, and the drying stoker 47 is spread thinly. .

In addition, when the quality of the garbage is good, the specific gravity is small and the garbage weight F per unit time is the rated weight F0 of the drying stoker 47.
Therefore, in order to increase the volume of waste extruded by the lower extruder 67, the stroke L of the upper extruder 65 and the lower extruder 67 is controlled to be longer, and the drying stoker 47 is spread thickly. . In addition, in the case of the upper extruder 65, the stroke L is the same as that of the hopper chute 45.
The stroke L is based on the front end of the upper extruder 65 located in the rear end portion 63, and in the case of the lower extruder 67, the stroke L is based on the front end of the upper extruder 65 located in the vicinity of the drying stoker 47.
is based on the front edge of

Here, the control method will be explained.

For example, the rated weight F0 is 3000 kg/h and G is 90
If 0kg and T is 16 seconds, F=900x60
/16=3375kg, which is 37% lower than the rated weight F0.
5 kg more. In this case, the current stroke length is L1=L+ (F, -F
)/ Changed to (2F,).

Here, if L=700no, L1=656mlI
Becomes 11.

Therefore, in the dust supply device for the garbage incinerator configured as described above, the extrusion device 57 is arranged below the hopper chute 45, the garbage sensor 59 is arranged above the hopper chute 45, and the time T and garbage weight are determined. G is taken in as data and the extrusion device 57 is operated so that the garbage weight F approaches the rated weight F0.
The extrusion device 57 is connected to an upper extruder 65 whose front end moves a predetermined stroke L forward from the rear end 63 of the hopper chute 45, and an upper extruder 65 whose front end moves upward from a predetermined position to near the drying stoker 47. Since the device 65 is configured with a lower extruder 67 that moves with approximately the same stroke L, the control device 61 derives the weight F of waste per unit time supplied to the drying stoker 47, and this weight F of waste is the rated weight. When the amount is more than F0, the stroke of the upper extruder 65 and the lower extruder 67 is controlled to be shorter by the control device 61, and when it is less than F0, the stroke is controlled to be longer, and an appropriate amount of garbage 75 is controlled according to the quality of the garbage. drying stoker 4
7 can be reliably supplied.

That is, when the quality of waste is poor, the weight F of waste per unit time becomes larger than the rated weight F0 of the drying stoker 47. Therefore, in order to reduce the volume of waste extruded by the lower extruder 67, The stroke of the lower extruder 67 is controlled to be short, and the drying stoker 47
The garbage 75 is spread thinly, and the drying of the garbage 75 is promoted, the combustion in the combustion stoker 50 is promoted, and the combustion efficiency of the garbage incinerator 41 can be improved.

Furthermore, when the quality of the waste is good, the weight F of waste per unit time is the rated weight F of the drying stoker 47.

Therefore, in order to increase the volume of waste extruded by the lower extruder 67, the strokes of the upper extruder 65 and the lower extruder 67 are controlled to be longer, and the drying stoker 47 is thickly covered with dust. Combustion in the dry stoker 47 can be suppressed, combustion in the combustion stoker 50 can be promoted, and generation of unburned substances can be suppressed.

Furthermore, below the dust sensor 59, the dust 75 in that area is
Since the auxiliary garbage sensor 73 is arranged to react when the garbage 7 runs out, the garbage 7
5 is clogged, and the garbage 75 below is supplied and becomes hollow near the auxiliary garbage sensor 73. This condition is confirmed by the auxiliary garbage sensor 73, and the signal from the auxiliary garbage sensor 73 causes the hopper chute 45 to vibrate, for example. can be applied to drive a device that encourages the garbage 75 to fall, thereby ensuring the safety of the garbage incinerator.

〔Effect of the invention〕

As described above, in the dust supply device for a garbage incinerator according to claim 1, the extrusion device is arranged below the hopper chute, the garbage sensor is arranged above the hopper chute, and the time T and the garbage weight G are set as data. The garbage weight F taken in as rated weight F. A control device is provided to control the extrusion device so that the extrusion device is brought closer to the drying stoker, and the extrusion device is connected to an upper extruder whose front end moves a predetermined stroke L forward from the rear end of the hopper chute, and an upper extruder whose front end moves from a predetermined position to the vicinity of the drying stoker. Since it consists of a lower extruder that moves approximately the same stroke L as the drying stoker, the control device determines the weight F of waste per unit time to be supplied to the drying stoker, and this weight F of waste is the rated weight F. If the amount is more than , the control device will shorten the stroke of the upper extruder and lower extruder, and if it is less, the stroke will be lengthened, and the appropriate amount of garbage will be sent to the drying stoker depending on the quality of the garbage. can be reliably supplied.

In the dust supply device for a garbage incinerator according to claim 2, in the dust supply device for a garbage incinerator according to claim 1, an auxiliary garbage sensor is arranged below the garbage sensor, which reacts when there is no more garbage in that part. Therefore, if the area where the garbage sensor is located becomes clogged with garbage and the garbage below it is no longer being supplied, this condition will be confirmed by the auxiliary garbage sensor.
The signal from the auxiliary garbage sensor can, for example, drive a device that vibrates the hopper chute to encourage the garbage to fall, thereby ensuring the safety of the garbage incinerator.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are cross-sectional views of a fir tree showing the dust supply device of the garbage incinerator of the present invention and its vicinity. FIG. 3 is an explanatory diagram showing the extrusion device of FIG. 1 and its vicinity. FIG. 4 to FIG. 7 are explanatory diagrams showing the state in which dust is pushed out. FIG. 8 to FIG. 10 are explanatory diagrams showing a conventional dust supply device and its vicinity. [Description of symbols of main parts] 41... Garbage incinerator 43... Hopper 45... Hopper chute 47... Drying stoker 49... Dust supply device 57... Extrusion device 59... Garbage sensor 61...Control device 65...Upper extruder 67...Lower extruder 73...Auxiliary garbage sensor. Diagram number 101! !

Claims (2)

[Claims] (1) An extrusion device that is placed below the hopper chute that guides the garbage and pushes the garbage toward the drying stoker by moving back and forth, and garbage that is placed above the hopper chute and reacts when the garbage in this area is exhausted. A sensor, a time T in which a certain volume of waste supplied to the hopper by a waste crane is reduced to the position of the waste sensor, and a weight G of the certain volume of waste measured by the waste crane are captured as data and supplied to the drying stoker. and a control device that controls the extrusion device so that the garbage weight F per unit time approached the rated weight F_0 of the dry stoker, and the extrusion device:
an upper extruder whose front end moves a predetermined stroke forward from the rear end of the hopper chute; and an upper extruder which is alternately driven forward with the upper extruder and is disposed below the upper extruder, and whose front end moves from a predetermined position to the drying stoker. It is characterized by comprising a lower extruder that moves almost the same stroke as the upper extruder up to the vicinity, and the strokes of the upper extruder and the lower extruder are controlled by the control device according to the quality of the waste. A dust supply device for a garbage incinerator. (2) The dust supply device for a waste incinerator according to claim 1, wherein an auxiliary waste sensor is arranged below the waste sensor to react when there is no more waste in that part.