JPH10253028A - Refuse feeding device of refuse incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate fluctuations in the degree of consolidation of refuse in a refuse storage tank and execute stable combustion of the refuse in a furnace. SOLUTION: An ultrasonic level meter 13 is downwardly set up on the upper end of a refuse storage tank 7 erected on an entrance 5 of a refuse feeding machine 1 in order to measure continuously a pile up level of refuse 11. A controller 14, which transmit a command to a drive device of a refuse supply machine 10, which charges the refuse 11 into the refuse storage tank 7, is provided based on a measured value of the ultrasonic level meter 13. The pile up level of the refuse 11 in the refuse storage tank 7 is arranged to maintain a definite value by suppressing the drive speed of the refuse supply machine 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust supply apparatus for stably supplying waste to a waste incinerator.

[0002]

2. Description of the Related Art As shown in FIG. 2, an example of a dust supply apparatus used for supplying waste to a fluidized bed waste incinerator for incinerating waste such as municipal waste is shown in FIG.
A non-crushing type dust feeder 1 in which a screw 3 is rotatably housed in a casing 2 is placed horizontally, and an outlet 4 serving as a tip of the dust feeder 1 communicates with an incinerator. A waste storage tank 7 is vertically connected to an inlet 5 on the base end side of the dust feeder 1 while being connected to a duct 6, and a belt conveyor driven by a motor 8 is connected to an upper end of the waste storage tank 7. 9, a waste supply device 10 having a model 9 is connected, and the waste material 11 put into the waste storage tank 7 by the waste supply device 10 is taken into the casing 2 of the dust supply device 1 through the inlet 5 and screwed. With the rotation of 3, the sheet is conveyed to the outlet 4 side and sent out into the dust supply duct 6.

[0003] In the dusting apparatus, in order to quantitatively and continuously supply the waste 11 to the incinerator, for example, a photoelectric tube type upper level meter 12H is provided at an upper and lower position in the middle of the waste storage tank 7. A total of 12 L of lower level is installed, and waste 11
When the deposition level of the waste falls below the level detected by the lower level meter 12L, the motor 8 of the waste feeder 10 is driven,
When the accumulation level of the waste 11 rises above the level detected by the upper level meter 12H, a control method is adopted in which the driving of the motor 8 is stopped.

[0004]

However, the ON / OF of the phototube type level meters 12H and 12L as described above.
In the case of a dust-feeding device that adopts the F control method,
Since the level of the waste 11 deposited in the waste storage tank 7 constantly fluctuates between the upper level meter 12H and the lower level meter 12L, the pressure density of the waste 11 is not uniform, and the waste 11 is There is a problem that it becomes a lump and drops or is interrupted, leading to unstable combustion in the furnace. The unstable combustion of this waste makes the properties of the exhaust gas worse,
In particular, a problem that promotes an increase in CO, which causes dioxin generation, is caused.

Therefore, the present invention is to control the accumulation level of the waste in the waste storage tank to be almost always constant to eliminate the fluctuation of the pressure density and to enable the waste to be stably burned in the furnace. It is assumed that.

[0006]

According to the present invention, in order to solve the above-mentioned problems, waste is fed by a waste feeder into a waste storage tank set up at the entrance of a duster, and the waste is discharged as described above. In the waste storage tank in the waste incinerator dust feeder, which is transported by a dust feeder and supplied to the incinerator,
A level meter such as an ultrasonic level meter is installed so that the accumulation level of the waste in the waste storage tank can be continuously measured in an analog manner, and based on the measured value of the level meter, The system is provided with a controller that controls the driving speed.

[0007] The level of waste accumulation in the waste storage tank is continuously measured by a level meter, and the driving speed of the waste feeder is controlled based on the value, so that the accumulation level of waste is always constant. The maintenance can eliminate fluctuations in the compaction density of the waste. Therefore, the waste is stably supplied to the incinerator and is stably burned.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
In the same manner as shown in FIG. 2, the waste feeder 10 feeds waste 1 into a waste storage tank 7 erected at the inlet 5 of the dust feeder 1.
1 and the waste 11 is conveyed by the duster 1 and sent out into a dust duct 6 communicating with the incinerator. At the upper end, an ultrasonic level meter 13 is installed in a downward attitude as a level meter for continuously measuring the accumulation level of the waste 11 in the waste storage tank 7 in an analog manner. The controller 1 controls the speed of the motor 8 of the waste feeder 10 based on the detected value of the waste to maintain the accumulation level of the waste 11 substantially constant.
4 is provided.

When the waste 11 is put into the waste storage tank 7 by the waste feeder 10, the waste 11 is transferred to the dust feeder 1.
And is sent out into the dust supply duct 6,
At this time, the accumulation level of the waste 11 in the waste storage tank 7 is controlled so as to be maintained substantially constant based on the measurement value of the ultrasonic level meter 13.

That is, the ultrasonic level meter 13 installed at the upper end of the waste storage tank 7
1 is continuously measured, and when the measured level is sent to the controller 14, it is compared with the set level set in the controller 14, and when the measured level is lower than the set level, Is transmitted from the controller 14 such that the rotation speed of the motor 8 for driving the waste feeder 10 is increased, so that the moving speed of the belt conveyor 9 is increased. As a result, the input amount of the waste 11 is reduced. On the other hand,
When the measurement level is higher than the set level, a command to decrease the rotation speed of the motor 8 is sent from the controller 14, and the movement speed of the belt conveyor 9 is reduced. The input is reduced.

As described above, the waste 11 in the waste storage tank 7 is
Is continuously measured in an analog manner by the ultrasonic level meter 13, and the driving speed of the waste feeder 10 is controlled based on the measured value, so that the accumulation of the waste 11 in the waste storage tank 7 is performed. The level can always be kept almost constant. Therefore, it is possible to eliminate the fluctuation of the pressure density of the waste 11, and it is possible to perform the stable supply by eliminating the lump and drop of the waste 11 sent out from the duster 1 to the dust duct 6. In addition, stable combustion can be obtained in an incinerator. As a result, generation of CO can be suppressed, and generation of dioxin can be suppressed.

In the above embodiment, the waste storage tank 7
Although the case where the ultrasonic level meter 13 is used as a level meter for continuously measuring the accumulation level of the waste 11 in the inside is shown, a level meter of another method other than the ON / OFF method such as a radio wave method is adopted. It is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0014]

As described above, according to the present invention, waste is fed by a waste feeder into a waste storage tank provided at the entrance of a duster, and the waste is transported by the duster. In the waste incinerator dusting apparatus which is to be supplied to the incinerator, in the waste storage tank, a level meter for continuously measuring the accumulation level of the waste in the waste storage tank is installed, In addition, since the controller is provided with a controller for controlling the driving speed of the waste supply device based on the measurement value of the level meter, the accumulation level of waste in the waste storage tank can be constantly maintained. Thus, fluctuations in the pressure density of the waste can be eliminated, whereby the waste can be stably supplied from the duster to the incinerator, and stable combustion can be performed, thereby suppressing the generation of CO. By being able to do dioxin It is possible to contribute to the raw of suppression,
In addition, the use of an ultrasonic level meter as the above-mentioned level meter is advantageous in that it is advantageous.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a dust supply device for a waste incinerator according to the present invention.

FIG. 2 is a schematic diagram illustrating an example of a conventional dust incinerator dust supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust feeder 5 Inlet 7 Waste storage tank 10 Waste feeder 11 Waste 13 Ultrasonic level meter (Level meter) 14 Controller

Claims (2)

[Claims] 1. A waste feeder feeds waste into a waste storage tank set up at an entrance of a dust feeder, and the waste is transported by the dust feeder and supplied to an incinerator. In the above waste storage tank in the waste incinerator dust feeder,
A configuration in which a level meter for continuously measuring the accumulation level of the waste in the waste storage tank is installed, and a controller for controlling the driving speed of the waste feeder based on the measurement value of the level meter is provided. A waste incinerator dusting apparatus characterized by having: 2. An apparatus for feeding waste incinerators according to claim 1, wherein said level meter is an ultrasonic level meter.