JPS63273716A - Combustion control method of incinerator - Google Patents

Abstract

PURPOSE:To achieve the complete combustion of refuse by a method wherein combustion completion locations determined from the maximum brightness locations re averaged and the averaging result and a target combustion completion location are compared each other. CONSTITUTION:The combustion of refuse 12 in an incinerator 10 is monitored by a television camera 31 and a signal S1 as a monitoring result by the use of the camera 31 is provided to a scanning circuit and use to monitor the incinerator 10 in up and down directions. After the maximum brightness location in each scanning line is selected, an actual combustion location is determined by reducing a fixed value from the maximum brightness location and its value is delivered as a signal. Also the target combustion completion location in the incinerator 10 is previously delivered as a signal. Control signals S6 are provided, for instance, to drive units 14, 16 and control the period of intermittent operation of a drying stoker 13 or a combustion stoker 15 to regulate the travel speed of the refuse on the stokers and are used to control the combustion completion location of the refuse 12 as a result.

Description

Detailed Description of the Invention (1) Purpose of the Invention [Industrial Field of Application] The present invention relates to a combustion control method for an incinerator, and in particular to a method for monitoring the inside of an incinerator from the front in the direction of movement of waste using a television camera. The combustion completion position is determined from the highest brightness position of each scanning line obtained by scanning vertically at multiple locations in the horizontal direction, and the average combustion completion position is obtained by averaging the determined combustion completion positions. The stoker operation cycle is compared with a preset target combustion completion position, and the stoker operation cycle is adjusted according to the comparison result.
The position where the combustion of the garbage is completed on the stoker of the incinerator is controlled by adjusting at least one of the amount of garbage supplied through the garbage supply path and the amount of combustion air supplied to the incinerator. This invention relates to a combustion control method for an incinerator.

[Prior Art] As a conventional combustion control method for this type of incinerator, an industrial television camera or the like is used to capture the combustion state in the incinerator as a planar distribution of voltage signals corresponding to brightness, and to monitor the progress of waste. The voltage signal in any distribution in the direction is integrated to obtain the average brightness, and the brightness distribution for one screen is represented as a sequence of average brightness values distributed in the direction of dust movement, and the average brightness value or the rate of change in brightness is specified. It has been proposed to control combustion in an incinerator using the point at which the value is reached as the burnout point position (see Japanese Patent Laid-Open No. 107112/1983).

[Problems to be solved] However, in conventional combustion control methods for incinerators, the burnout point position is determined as the point at which the average brightness value or its rate of change in brightness reaches a specified value. It has the disadvantage of requiring a highly sensitive industrial television camera, etc., and the disadvantage that the electrical circuit is complicated.Furthermore, it has the disadvantage that it cannot maintain the correct combustion position of the garbage and achieve complete combustion. Ta.

Therefore, in order to eliminate these drawbacks, the present invention automatically controls combustion by averaging the combustion completion position determined from the highest brightness position and comparing the averaged result with the target combustion completion position. The purpose of the present invention is to provide a combustion control method for an incinerator that performs the following steps.

(2) Structure of the Invention [Means for Solving the Problems] The means for solving the problems provided by the present invention is as follows. In the furnace combustion control method, (a) the first step is to monitor the inside of the incinerator with a television camera, and (b) the results of monitoring in the first step are scanned vertically at multiple locations, and the highest point on the scanning line is (C) a third step of calculating an average combustion completion position by averaging the actual combustion completion positions determined in the second step; d) a fourth step of comparing the average combustion completion position calculated in the third step with the target combustion completion position, and (e) determining the operating cycle of the stoker and the garbage supply path according to the comparison results in the fourth step. and a fifth step of controlling the combustion completion position of the garbage on the stoker by adjusting at least one of the amount of garbage supplied through the stoker and the amount of combustion air supplied to the incinerator. ``Incinerator combustion control method''.

[Function] The combustion control method for an incinerator according to the present invention involves scanning the results of monitoring the combustion state of garbage in the incinerator using a TV camera in the vertical direction at a plurality of locations, and calculating the actual brightness from the highest brightness position on each scanning line. The combustion completion position is determined, and the average combustion completion position calculated by averaging the actual combustion completion positions is compared with the target combustion completion position, and the operation cycle of the stoker is adjusted depending on the comparison result. By adjusting at least one of the amount of garbage supplied to the stoker and the amount of combustion air supplied to the incinerator, the position where the combustion of the garbage on the stoker is completed is controlled. It also serves to reduce the need for highly sensitive television cameras or complicated electrical circuits.

[Example] Next, the present invention will be specifically described with reference to the accompanying drawings.

FIG. 1 is a partial cross-sectional view showing an incinerator in which combustion control is performed by an embodiment of the incinerator combustion control method according to the present invention.

FIG. 2 is a circuit diagram showing a control circuit for performing combustion control of the incinerator shown in FIG. 1 according to an embodiment of the present invention.

FIG. 3 is an operation explanatory diagram for explaining the operation of the circuit diagram shown in FIG. 2.

First, the combustion control method for an incinerator according to the present invention will be explained in detail while explaining the configuration of an apparatus for carrying out the method.

The device is an incinerator, and the dust feeder IIA is intermittently driven by a drive device 111B such as a hydraulic cylinder while the garbage feed path 1 is being driven.
Garbage 12 that has been supplied in the six directions of arrows through 1
is caused to fall and be supplied onto the drying stoker 13. The drying stoker 13 is intermittently operated in the direction of arrow B by a movable element 13B or a driving device 14 such as a hydraulic cylinder relative to the stator 13A, thereby drying the dust 12 and moving it toward the combustion stoker 15. The combustion stoker 15 moves the movable element 15B relative to the stator 15A toward the post-combustion stoker 17 while burning the dust 12 by intermittently operating the mover 15B in the direction of arrow C by a drive device 16 such as a hydraulic cylinder. The after-combustion stoker 17 removes dust 1 by intermittently operating the mover 17B relative to the stator 17A in the direction of the arrow by a drive device 18 such as a hydraulic cylinder.
Of the two, those that were not completely burnt out on the combustion stoker 15 are completely burned and then moved toward the anti-falling port 19. The ash that has reached the anti-falling port 19 is dropped in the direction of arrow E and is processed by a subsequent ash processing device (not shown). 20. ~． 22 is an under-furnace chute, each with a drying stoker 13. It is arranged directly under the combustion stoker 15 and the after-combustion stoker 17, and the drying stoker 13. The ash falling from the combustion stoker 15 and the post-combustion stoker 17 is collected and sent out in the directions of arrows F, G, and H, and supplied to a subsequent ash processing device (not shown). 20A
.

~, 22A are combustion air supply ports, and are connected to the under-furnace chute 20. ~． The under-furnace chute 20.22 is opened to supply an appropriate amount of combustion air from a combustion air supply source (not shown) to the under-furnace chute 20. ~． 22 and thus the drying stoker 13.
Debris 1 on the combustion stoker 15 and after-combustion stoker 17
2. Reference numeral 23 denotes an exhaust gas guide passage, which is opened above the drying stoker 13 of the incinerator, and guides the exhaust gas generated by combustion of the waste IZ on the drying stoker 13 or the post-combustion stoker 17 in the direction of arrow 1. 25 is a burner device, and a post-combustion stoker 17
The incinerator is disposed near the incinerator, and ignites the waste 12 introduced onto the drying stoker 13 or post-combustion stoker 17 when the incinerator is started.

The river is a control circuit for executing combustion control of the incinerator.
It includes a television camera 31 for monitoring the inside of the incinerator from the opposite side of the garbage supply path 11. The television camera 31 is connected to a display control circuit 32 and displays the monitored content (ie, signal S+) on a display device 33. Reference numeral 34 denotes a scanning circuit connected to the television camera 31, which uses the signal S1 to scan multiple locations within the field of view of the television camera 31 at predetermined intervals (for convenience, 8
point) in the vertical direction, and each scanning line goes up 2. ~． L8
After selecting the maximum brightness position of P1., the actual incineration completion position P1.
~． P8 and output it as signal S2. Signal S
2 is given to the display control circuit 32, and its content is the actual combustion completion position P1. ~.

P6 is displayed as an "X" on the display surface 33A of the display device 33 for each scanning line L□, -, L8 (see FIG. 3). 3
5 is an averaging circuit connected to the scanning circuit 34, which receives the signal S2.
The actual combustion completion positions px+~, P8, which are the contents of , are averaged to calculate an average combustion completion position P, which is output as a signal S3. The signal S3 is given to the display control circuit 32, and its content, the average combustion completion position P, is displayed as a broken line on the display surface 33A of the display device 33 (see FIG. 3). 36
is a setting circuit for setting a target combustion completion position Q in the incinerator bed, and outputs the target combustion completion position Q as a signal S4. The signal S4 is given to the display control circuit 32,
The target combustion completion position Q, which is the content thereof, is displayed as a solid line on the display surface 33A of the display device 33 (see FIG. 3). 37 is a comparison circuit connected to the averaging circuit 35 and the setting circuit 36, which compares the signal S3 and the signal S4, and determines whether the average combustion completion position P, which is the content of the signal S3, is the target combustion completion position Q, which is the content of the signal S4. It is determined whether it is on the upper side or the lower side, and outputted as a comparison signal S5. 38 is a comparison circuit 37
A control signal generation circuit connected to the control signal S6 for adjusting the combustion completion position of the dust 12 on the drying stoker 13 or the combustion stoker 15 according to the comparison signal Ss.
Output. That is, the control signal S6 is given to the drive device 14.16, for example, and adjusts the period of intermittent operation of the drying stoker 13 or the combustion stoker 15 to adjust the moving speed of the dust 12 thereon, and as a result, the dust It is used to control the combustion completion position of 12. Alternatively, the control signal S6 is a means for supplying the dust 12 to the dust supply path 11 (
For example, it is supplied to the drive device 11B) of the dust feeder IIA, and adjusts the amount of dust 12 supplied via the dust supply path 11 to the drying stoker 13 or the combustion stoker 15.
It is used to adjust the amount of movement of the upper dust 12 and, as a result, to control the combustion completion position of the dust 12. Alternatively, the control signal S6 is given to a combustion air supply port (not shown) for the incinerator, for example, the supply of combustion air to the incinerator via the combustion air supply ports 20A, 22A, It is used to adjust the amount and, as a result, to control the combustion completion position of the waste 12. In addition, the control signal S6 controls the drive 14 of the drying stoker 13 and the combustion stoker 15,
16, used to control the combustion completion position of the garbage 12 in the same manner as described above by being provided to at least two of the means for supplying the garbage 12 to the garbage supply path 11 and the air supply device to the incinerator. may be done.

Furthermore, the combustion control method for an incinerator according to the present invention will be explained in detail while explaining the operation of the apparatus for carrying out the method.

Incinerator drying stoker 13. Combustion stoker 15 and after-combustion stoker 17 are each driven! 14°16.1
8, the dust feeder IIA is operated intermittently in the directions of the arrows B, C, and D at predetermined intervals, and the dust 12 is supplied from the garbage supply path 11 in the direction of the arrow A. In conjunction with this, the incinerator ■
An appropriate amount of air will begin to be pumped inside.

When the dust 12 moves in the direction of the arrow on the drying stoker 13 and the combustion stoker 15 and reaches a predetermined position, the dust 12 is ignited by the burner device 25. The garbage 12 starts to burn and continues to burn mainly on the combustion stoker 15. However, the dirt 12 is also burned on the drying stoker 13 and also on the post-combustion stoker 17. □Dry stoker 13. Exhaust gas generated by combustion of the garbage 12 on the combustion stoker 15 or the post-combustion stoker 17 is guided in the direction of the arrow through the exhaust gas guide passage 23 and discharged outside the incinerator.

On the other hand, dry stoker 13. The ash generated by the combustion of the garbage 12 on the combustion stoker 15 or the post-combustion stoker 17 is dropped in the direction of arrow E toward the opposite fall port 19.

The combustion of garbage 12 in the incinerator
1, and the monitoring result, that is, the contents of the signal S1, is displayed on the display surface 33A of the display device 33 via the display control circuit 32 (see FIG. 3). That is, on the display surface 33A of the display device 33, the flame 26 inside the incinerator is displayed. Incidentally, on the display surface 33A of the display device 33, if there are flames 26 of the same brightness within the field of view of the television camera 31, the closer the flames 26 are, the higher the brightness is displayed.

A signal S1, which is the monitoring result of the television camera 31, is given to a scanning circuit 34, and is used to scan the incinerator in the vertical direction. That is, the scanning circuit 34 scans the scanning lines L 1 . ~． After selecting the highest brightness position on La, the actual combustion completion position P□, ~ is determined by subtracting a predetermined value determined by experiment from the highest brightness position.
, P8 and outputs it as a signal S2. The content of the signal S2, that is, the actual combustion completion position P, ..., P6
is the display surface 3 of the display device 33 via the display control circuit 32.
3A as an "X" (see Figure 3).

Further, the signal S2 is given to the averaging circuit 35, and is used to average the actual combustion completion positions Pr, to p8 to calculate the average combustion completion position P. That is, the averaging circuit 35 calculates that the content of the signal S2 is the actual combustion completion position P0. ~． P8 is stored sequentially, and scanning line L1
, ~. When scanning for La is completed, an average combustion completion position P is calculated and output as a signal S3. The content of the signal S3, that is, the average combustion completion position P is displayed as a broken line on the display surface 33A of the display device 33 via the display control circuit 32 (see FIG. 3).

The setting circuit 36 sends a signal S4 to indicate a target combustion completion position Q stored in advance as a desired combustion completion position within the incinerator.
It is output as . The content of the signal S4, that is, the target combustion completion position Q, is displayed as a solid line on the display surface 33A of the display device 33 by the display control circuit 32 (see FIG. 3).
.

Signal S 3. S4 is provided to the comparison circuit 37 and is used to compare the average combustion completion position P and the target combustion completion position Q. In other words, the average combustion completion position P
is larger than the target combustion completion position Q and is higher on the display surface 33A of the display device 33, in other words, when the average combustion completion position P is retreating from the target combustion completion position Q in the moving direction of the dust 12. In this case, the comparison circuit 37 outputs the content of the comparison signal S5 as positive. On the other hand, when the average combustion completion position V is smaller than the target combustion completion position Q and is lower on the display surface 33A of the display device 33, in other words, the average combustion completion position P is lower than the target combustion completion position Q.
is moving forward in the direction of movement, the comparator circuit 37
outputs the content of the comparison signal S5 as negative.

The comparison signal S5 is provided to the control signal generation circuit 38 and is used to generate the control signal S6. That is, when the comparison signal S5 is positive, the control signal generation circuit 38 sets the content of the control signal S6 to advance the combustion completion position of the dust 12 on the drying stoker 13 or the combustion stoker 15, and when the comparison signal S5 is negative At this time, the content of the control signal S6 is such that the combustion completion position of the dust 12 on the drying stoker 13 or the combustion stoker 15 is moved back.

The control signal S6 is therefore for example the drive device 14.1.
6, and by adjusting the period of intermittent operation of the drying stoker 13 or the combustion stoker 15, the dust 1 on the drying stoker 13 or combustion stoker 15 is
It is used to adjust the moving speed of the dust 12 and, as a result, to control the combustion completion position of the dust 12.

Alternatively, the control signal S6 may be applied to a drive device 11 of a means for supplying the dust 12 to the dust supply path 11 (for example, a drive device 11 of the dust feed busher 11A
B), and the garbage 1 via the garbage supply path 11
This is used to adjust the amount of dust 12 supplied to adjust the amount of movement of the dust 12 on the drying stoker 13 or the combustion stoker 15, and as a result to control the position where the dust 12 completes combustion. Alternatively, the control signal S6 is given to a combustion air supply device (not shown) for incineration one issue, for example, the combustion air supply port 20A.

It is used to adjust the amount of combustion air supplied to the incinerator through . In addition, the control signal S6 controls the drive 14.16 of the drying stoker 13 and the combustion stoker 15;
By being provided to at least two of the means for supplying the refuse 12 to the refuse supply path 11 and the air supply device for the incinerator, it may be used to control the combustion completion position of the refuse 12 in the same manner as described above. good.

By repeating the above operations, the average combustion completion position P in the incinerator can be substantially maintained at the target combustion completion position Q, and the garbage 12 is stabilized at the desired combustion completion position in the incinerator. It can be burned.

(3) Effects of the Invention As is clear from the above, the incinerator combustion control method according to the present invention is an incinerator combustion control method in which garbage supplied via a garbage supply path is combusted while being moved on a stoker. The method comprises: (a) a first step of monitoring the inside of the incinerator with a television camera; (b) scanning the results of the monitoring in the first step in the vertical direction at multiple locations and determining the highest brightness position on the scanning line; (c) a third step of calculating an average combustion completion position by averaging the actual combustion completion positions determined in the second step; (d) (e) a fourth step of comparing the average combustion completion position calculated in the third step with the target combustion completion position; and a fifth step of controlling the combustion completion position of the garbage on the stoker by adjusting at least one of the amount of garbage supplied to the stoker and the amount of combustion air supplied to the incinerator. Therefore, (i) it has the effect of achieving complete combustion of garbage, and (jj) it has the effect of reducing the need for highly sensitive television cameras or complicated electric circuits.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view showing an incinerator in which combustion control is executed by an embodiment of the combustion control method for an incinerator according to the present invention, and FIG. 2 is a partial sectional view showing the incinerator shown in FIG. FIG. 3 is an operation explanatory diagram for explaining the operation of the circuit diagram shown in FIG. 2.

Claims (1)

[Scope of Claims] A combustion control method for an incinerator in which garbage supplied via a garbage supply path is moved and burned on a stoker, comprising: (a) a first method of monitoring the inside of the incinerator with a television camera; (b) a second step of scanning the results monitored in the first step in the vertical direction at multiple locations and determining the actual combustion completion position from the highest brightness position on the scanning line; (c) a second step; (d) Comparing the average combustion completion position calculated in the third step with the target combustion completion position; (d) comparing the average combustion completion position calculated in the third process; (e) The operating cycle of the stoker, the amount of garbage supplied via the garbage supply path, and the amount of combustion air supplied to the incinerator according to the results compared in the fourth step. A method for controlling combustion in an incinerator, comprising: a fifth step of controlling the combustion completion position of garbage on the stoker by adjusting at least one of the following.