JP2021134966A - Control device, control method, and program - Google Patents

Abstract

To provide a control device which stabilizes a combustion condition of a waste incineration facility.SOLUTION: A control device includes a waste supply amount control part which controls a supply of wastes supplied to a furnace of a refuse incineration facility so that a steam flow of steam generated from the refuse incineration facility becomes a predetermined first set value, and an air flow rate control part which calculates a control value of an air flow rate of air supplied to the furnace so that a sensitivity of the steam flow with respect to a variation of the air flow rate becomes a predetermined second set value.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to control devices, control methods and programs for waste incinerators.

In garbage power generation, where a boiler is installed in a garbage incinerator, the heat generated during garbage incineration is recovered, and the generated steam is used to generate electricity, garbage is used as fuel. In order to eliminate the variation in the amount of power generated by garbage power generation, it is indispensable to stabilize the combustion of garbage and stably generate steam as planned.

In Patent Document 1, the steam flow rate of steam supplied from the boiler of the garbage incinerator to the power plant is detected, and the amount of garbage and air supplied to the garbage incinerator is adjusted based on the detected steam flow rate. , A control device for stable combustion of garbage is disclosed. This control device reduces the supply amount of dust into the furnace when the steam flow rate exceeds the standard value, and moves the dust in the furnace among the dry area, combustion area, and post-combustion area of the moving bed. Reduce the flow rate of air supplied to the dry and combustion areas. In addition, the control device increases the amount of dust supplied and the amount of air supplied to the dry area and the combustion area when the steam flow rate falls below the reference value.

The components of garbage supplied to the garbage incinerator are diverse. Something like a plastic bag instantly burns out when supplied to a fire pot. It is difficult to adjust the combustion of garbage such as plastic bags with the response speed of the air supply system installed in the garbage incinerator. On the other hand, since kitchen waste such as kitchen waste has moisture, it does not burn immediately even if it is supplied to the furnace, and it is necessary to wait for it to dry. For such garbage, it is possible to control the combustion by utilizing the time from drying to combustion. In the following, we will focus on garbage that burns after drying.

It is clear that the heat output of a garbage incinerator is proportional to the burning rate of garbage. The burning rate of garbage is expressed by the following equation (1).
g _B = k _B · m _B ... (1)
Here, k _B is a coefficient representing the flammability mainly determined by the oxygen concentration, and the value increases as the amount of air supplied to the waste incinerator is increased. m _B is the mass of drying was Fuel remaining after waste (stock). When the amount of adjustment of the combustion rate _{is expressed by Δg B,} it is expressed by the following equation.
Δg _B = k _B · Δm _B + Δk _B · m _B ... (2)

With reference to equation (2), there are two possible methods for controlling the combustion rate. The first method is a method of controlling the supply amount of the based on the first term of the right side (k B _· Δm _B), the incinerator of garbage as fuel. This method is effective if a desired amount of dried and immediately fuelable waste can be supplied, but in reality, the waste whose supply amount to the waste incinerator can be adjusted is the waste before drying. Then, since the garbage to be supplied is damp, it does not burn immediately, and it is necessary to stay in the furnace for a while and wait until it dries and becomes fuel. Alternatively, if the debris is in large chunks, it may be in the center and you may have to wait for the chunks to crumble before burning. For these reasons, this method is not responsive. Therefore, even if the amount of dust to be supplied is controlled, it is not always possible to immediately control the desired combustion rate.

The second method, on the basis of the second term on the right side of formula _{(2) (Δk B · m} B), a method of controlling the air supply to the furnace. Since the garbage incinerator already has a stock of dried garbage, increasing the air supply increases the combustion rate and heat output. For example, even in the control method described in Patent Document 1, when the amount of steam falls below the reference value, the amount of air supplied is increased.

As is clear from the equation (2), the sensitivity of the combustion rate adjustment amount Δg _{B with respect to the air supply adjustment Δk B is the stock m B} of the dried and fueled garbage. If the value of the garbage stock m _{B can be controlled to be constant and Δk B} can be adjusted, the combustion rate adjustment amount Δg _B can be controlled. If Δg _B can be controlled, the combustion state can be controlled to a desired state.

As a related technique, Patent Document 2 describes a control for stabilizing the combustion of garbage by keeping the burnout level of the garbage constant. In Patent Document 2, the burnout level of dust is defined as the sum W1 + W2 of the dust mass W1 in the dry region where wet dust is deposited and the dust mass W2 in the combustion region where dried dust is deposited. As mentioned above, the garbage in the dry area does not become fuel until it dries. Therefore, even if the burning level of garbage is constant, the burning state may differ depending on the breakdown. For example, if a thick stock of dry dust accumulates and the dust layer collapses in such a state, the combustion speed in the entire furnace may suddenly increase, causing large disturbances in the steam flow rate and the like. ..

Further, in Patent Document 3, the amount of dust supplied increases when the dust at the bottom of the hopper is compacted to increase the dust specific density or when the dust itself to be put into the hopper is heavy, and the amount of dust is quantified. In response to the problem of difficulty in supplying dust, a method of controlling the speed of the pusher that pushes the dust into the furnace so that the supply weight of the dust becomes constant according to the specific gravity of the dust in the hopper is disclosed. There is.

Special Fair 03-023806 Gazette Japanese Unexamined Patent Publication No. 61-36611 Japanese Unexamined Patent Publication No. 2001-35519

In order to keep the combustion state of refuse incinerator to a desired state manages the stock m _B of combustible waste, it is necessary to control the burn rate of the waste.

The present disclosure provides a control device, a control method, and a program capable of solving the above problems.

The control device of the present disclosure includes a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value. An air flow rate control unit that calculates a control value of the air flow rate so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value is provided.

The control device of the present disclosure is a garbage supply amount control unit that calculates the supply amount of garbage to be supplied to the furnace of the garbage incineration facility, and the steam flow rate of the steam generated by the garbage incineration facility is set to a predetermined first set value. The first supply amount of the dust is calculated, and the second supply amount of the dust is calculated so that the sensitivity of the steam flow rate to the change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value. A garbage supply amount control unit for calculating the supply amount by adding the second supply amount to the first supply amount is provided.

Further, the control method of the present disclosure controls the amount of dust supplied to the furnace of the waste incinerator so that the steam flow rate of steam generated by the waste incinerator becomes a predetermined first set value, and then to the furnace. The control value of the air flow rate is calculated so that the sensitivity of the steam flow rate to the change of the air flow rate of the supplied air becomes a predetermined second set value.

Further, the program of the present disclosure is a means for controlling the amount of trash supplied to the furnace of the trash incinerator so that the steam flow rate of steam generated by the trash incinerator becomes a predetermined first set value. It functions as a means for calculating a control value of the air flow rate so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value.

According to the above-mentioned control device, control method and program, the combustion state of garbage can be stabilized.

It is a figure which shows an example of the main part of the garbage incinerator which concerns on each embodiment. It is a figure explaining the control method which concerns on 1st Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 1st Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 2nd Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 3rd Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 4th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 5th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 6th Embodiment. It is a figure which shows an example of the functional structure of the control device by the prior art which concerns on 6th Embodiment. It is a figure explaining the general garbage supply amount control. It is the first figure explaining the garbage supply amount control which concerns on 6th Embodiment. It is a 2nd figure explaining the garbage supply amount control which concerns on 6th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 7th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 8th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on 9th Embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on tenth embodiment. It is a figure which shows an example of the functional structure of the control device which concerns on eleventh embodiment. It is a figure which shows an example of the hardware composition of the control device which concerns on each embodiment.

Hereinafter, the control device for the waste incinerator according to each embodiment will be described in detail with reference to FIGS. 1 to 18.

(composition)
FIG. 1 is a diagram showing an example of a main part of a garbage incinerator according to each embodiment.
The dust incineration facility 100 receives the hopper 1 into which the dust is charged, the pusher 2 for supplying the dust charged in the hopper 1 into the combustion chamber 6, and the dust supplied by the pusher 2 while transferring the dust. A stoker 3 that dries and burns, a combustion chamber 6 that burns dust, an ash outlet 7 that discharges ash, a blower 4 that supplies air, and a plurality of that guide the air supplied by the blower 4 to each part of the stoker 3. The wind boxes 5A to 5E and the boiler 9 are provided.

The pusher 2 is provided at the lower part of the hopper 1, moves the dust supplied in the hopper 1 forward and backward with a predetermined stroke, pushes the dust into the combustion chamber 6, and supplies the dust onto the stoker 3 in the combustion chamber 6. .. The pusher 2 receives a control signal from the control device 20 and performs an operation of pushing out dust.

The stalker 3 is located in the dry area 3A for evaporating and drying the moisture of the dust supplied by the pusher 2 and the wake of the dry area 3A, and is located after the combustion area 3B for burning the dried dust and the combustion area 3B. It is located in the stream and has a post-combustion region 3C that burns unburned components such as fixed carbon components that have passed through without being burned until they become ash. The operating speed of the stoker 3 is controlled by receiving the control signal from the control device 20.

The blower 4 supplies air to each part of the stoker 3 via the air boxes 5A to 5E provided below the stoker 3. For example, when the amount of air supplied in the combustion region 3B increases, the combustion of dust is promoted. The blower 4 receives a control signal from the control device 20 and changes the air flow rate of the air boxes 5A to 5E. Further, a valve 8A is provided in the pipeline connecting the blower 4 and the air box 5A, and the air flow rate supplied to the air box 5A can be adjusted by adjusting the opening degree of the valve 8A. Similarly, by adjusting the opening degree of the valves 8B to 8E, it is possible to control the air flow rate supplied to the air boxes 5B to 5E, respectively. The opening degree of the valves 8B to 8E is controlled by receiving the control signal from the control device 20.

The combustion chamber 6 is composed of a primary combustion chamber 6A and a secondary combustion chamber 6B above the stoker 3, and the boiler 9 is arranged in the combustion chamber 6. The boiler 9 generates steam by exchanging heat with the exhaust gas sent from the combustion chamber 6 and the water circulating in the boiler 9. The steam is supplied to the power plant through the pipeline 10. The pipeline 10 is provided with a steam flow rate sensor 11 that detects the flow rate of steam. The steam flow rate sensor 11 is connected to the control device 20, and the measured value measured by the steam flow rate sensor 11 is transmitted to the control device 20. A flue gas 12 is connected to the exhaust gas outlet of the boiler 9, and the exhaust gas heat recovered by the boiler 9 passes through the flue gas 12, passes through an exhaust gas treatment facility (not shown), and is discharged to the outside. The flue 12 is provided with a CO concentration sensor 13 and an O _{2 concentration sensor 14.} CО density sensor 13, O2 concentration sensor 14 is be connected to the control unit 20, the measurement value CО concentration sensor 13, _{O 2} concentration sensor 14 is measured is transmitted to the control device 20.

The control device 20 includes a data acquisition unit 21, an air flow rate control unit 22, a dust supply amount control unit 23, and a dust transfer control unit 24.
The data acquisition unit 21 acquires various data such as sensor measurement values and user command values. For example, the data acquisition unit 21 acquires the measured value measured by the steam flow rate sensor 11.
The air flow rate control unit 22 outputs a control signal to the blower 4 and controls the operation of the blower 4 to control the air flow rate supplied to the stoker 3. Further, the air flow rate control unit 22 outputs a control signal to the valves 8A to 8E and adjusts the opening degree of each of the valves 8A to 8E to control the air flow rate supplied to the air boxes 5A to 5E.
The dust supply amount control unit 23 controls the amount of dust supplied to the combustion chamber 6 by outputting a control signal to the pusher 2 and controlling the operation of the pusher 2. For example, the dust supply amount control unit 23 calculates a dust supply amount such that the measured value measured by the steam flow rate sensor 11 becomes a predetermined set value, and pushers so that this supply amount can be supplied to the combustion chamber 6. Outputs a control signal that extends 2. For example, when the measured value of the steam flow rate falls below the set value, the dust supply amount control unit 23 increases the supply amount of dust, and when the measured value of the steam flow rate exceeds the set value, the dust supply amount decreases.
The dust transport control unit 24 outputs a control signal to the stoker 3 and controls the dust transport speed by the stoker 3.

<First Embodiment>
FIG. 2 is a diagram illustrating a control method according to the first embodiment.
In this embodiment, to stabilize the waste combustion manages stock m _B of drying was Fuel remaining after waste. As can be seen from the above equation (2), it is possible to estimate the m _B from the sensitivity of burning rate against the amount of air supply. Therefore, in the present embodiment, the amount of air supplied is changed, and the response of the combustion rate of dust in the furnace (combustion chamber 6) to the amount of air supply is obtained. For example, the steam flow rate can be used as an index of the combustion rate. As another example, for example, the temperature of the exhaust gas discharged from the furnace may be used as an index of the combustion rate. The relationship between the air flow rate and the steam flow rate is shown in the graph of FIG. The vertical axis of FIG. 2 shows the steam flow rate, and the horizontal axis shows the air flow rate. 2 shows a curve 310 showing the relationship between the measured value of the steam flow air flow and steam flow rate sensor 11 which is supplied to the furnace when the stock m _B of the fuel of the waste is large measure, is m _B A curve 320 showing the relationship between the air flow rate and the steam flow rate when the value is small is displayed. The left end of these curves (the region to the left of A0 in the figure) is the region of air shortage. When insufficient air, regardless of the magnitude of the stock m _B of dust and Fuel, steam flow rate in the flow rate of air fed is determined. The right end (the region to the right of C0 in the figure) is the region of excess air. When the excess air, the steam flow rate is not dependent on air flow rate, determined by the stock m _B of the fuel of the waste. In both of the intermediate region, the slope of the curve 310, 320 (sensitivity) varies according to the value and the air flow rate m _B.

For example, consider operating while maintaining the steam flow rate of D. At this time, if the stock m _B of the fueled garbage is the same as that of the curve 320, the air flow rate is balanced by B. However, _{even if m B} is the same as that of the curve 310, if the air flow rate is A, the steam flow rate is balanced by D. In this way, even if the steam flow rate is set to one point D, the stock m _B of the fueled garbage is indefinite. This leads to freedom of driving, but also indicates the need to manage the waste stock. For example, if the stock of garbage becomes excessive, inconveniences such as being discharged before it burns out in the incinerator may occur.

As a workaround, it is conceivable to manage _{the gradient (Δg steam} ) / (Δg _air ) of the curve of the steam flow rate with respect to the air flow rate to a predetermined value. For example, in FIG. 2, the slope of the curve is set to a value formed when the curve 310 has an air flow rate B. By doing so, the steam flow rate E becomes the balance point for m _B sized curve 320. In other words, it is determined gradient of the vapor flow rate and curve may define the value of the stock m _B of dried fuel of the waste one. In the present embodiment, this property is utilized to keep the steam flow rate (combustion rate) constant and stabilize the combustion state of the waste incinerator while controlling _{MB to a constant value.}

The steam flow rate can be monitored by acquiring the measured value of the steam flow rate sensor 11. The method for detecting the gradient will be described below. The combustion of garbage fluctuates constantly and is not constant over time. Therefore, in the method of increasing or decreasing the air flow rate and examining the response of the steam flow rate to it, the response is buried in steady fluctuations. In order to detect the response with high accuracy, it is conceivable to increase or decrease the air flow rate, but if the air flow rate is greatly increased or decreased, the stable operation of the garbage incinerator 100 is disturbed. Therefore, the air flow rate is changed in a sine wave shape with an amplitude within a range that does not adversely affect the operation of the garbage incinerator 100 in a specific cycle, for example, a cycle of about 1 minute, and only the components of that cycle are detected from the response of the steam flow rate. This eliminates the effects of steady fluctuations. An example of how to change the air flow rate is shown in Equation (3).

If the air is changed in a 1-minute cycle, the response also appears in the same cycle. Therefore, the amplitude of the component in the 1-minute cycle of the steam flow rate is detected by using the equation (4) by Fourier transform.

In addition, Δg _steam [t] = g _steam [t] −E (g _steam ). Here, E (g _steam ) is _{an expected value of g steam} [t], for example, an average value in one cycle. In this way, the periodic change of the steam flow rate with respect to the periodic change of the air flow rate is detected, the steam flow rate is controlled to a predetermined value, and the gradient (Δg _stem ) / (Δg _air ) is a predetermined value. if controlled to be, while maintaining the value of the stock m _B of the fuel of the waste constant to control the burn rate constant, the combustion state can be stabilized.

(composition)
Next, the function and configuration of the air flow rate control unit 22 in the first embodiment will be described.
FIG. 3 is a diagram showing an example of the functional configuration of the control device according to the first embodiment.
FIG. 3 shows the configuration of the air flow rate control unit 22 according to the present embodiment of the control device 20.
The data acquisition unit 21, the air flow rate control unit 22, and the dust transfer control unit 24 are the same as those described with reference to FIG.
The air flow rate control unit 22 includes a basic control unit 2201, an air flow rate cycle change generation unit 2202, a gradient setting unit 2203, a PI (Proportional Integral) control unit 2204, a response amplitude detection unit 2205, and a gradient calculation unit 2206. , Addition unit 2207, subtraction unit 2208, and subtraction unit 2209.

The basic control unit 2201 outputs a set value of the air flow rate in a combustion state in which the value of the steam flow rate measured by the steam flow rate sensor 11 becomes a predetermined set value.

The air flow rate cycle change generation unit 2202 calculates an increase / decrease value for increasing / decreasing the air flow rate in a predetermined cycle. The air flow rate cycle change generation unit 2202 calculates the increase / decrease value by using, for example, the second term on the right side of the equation (3).

The gradient setting unit 2203 calculates and outputs a gradient setting value corresponding to a predetermined steam flow rate setting value. The gradient value is predetermined for each set value of the steam flow rate.

The PI control unit 2204 calculates the air flow rate correction amount 11 so that the deviation between the set value of the gradient and the actual gradient (calculated value of the gradient calculated based on the steam flow rate and the air flow rate) becomes 0.

The response amplitude detection unit 2205 detects a change in the steam flow rate with respect to the air flow rate that is changing at a constant cycle by the air flow rate cycle change generation unit 2202. The response amplitude detection unit 2205 detects a periodic change in the amplitude of the steam flow rate based on, for example, the equation (4).

The gradient calculation unit 2206 is based on the amount of change in the amplitude detected by the response amplitude detection unit 2205 in a minute time (Δg _stage ) and the amount of change in the air flow rate calculated by the air flow rate control unit 22 in a minute time (Δg _air ). , Calculate the gradient (Δg _flow ) / (Δg _air).

(motion)
First, the basic control unit 2201 calculates the set value of the air flow rate and outputs the value to the addition unit 2207. The air flow rate cycle change generation unit 2202 calculates an increase / decrease value of the air flow rate and outputs the value to the subtraction unit 2208. The subtraction unit 2208 subtracts the correction amount 11 (initial value = 0) from the increase / decrease value to calculate the correction amount 12. The subtraction unit 2208 outputs the correction amount 12 to the addition unit 2207. The addition unit 2207 adds the set value of the air flow rate and the correction amount 12. The air flow rate control unit 22 sets the added value as the air flow rate set value A22-1 of the present embodiment. The air flow rate control unit 22 calculates the rotation speed command value of the blower 4 and the opening command values of the valves 8A to 8E based on the air flow rate set value A22-1. The air flow rate control unit 22 controls the air flow rate sent by the blower 4 based on the calculated rotation speed command value, and controls the opening degree of the valves 8A to 8E based on the opening degree command value.

Next, the air flow rate control unit 22 acquires the measured value of the steam flow rate measured by the steam flow rate sensor 11 through the data acquisition unit 21. The response amplitude detection unit 2205 extracts the response component to the periodic change in the air flow rate generated by the air flow rate periodic change generation unit 2202 from the changes in the measured value of the steam flow rate by using the Fourier transform, and steams. Calculate the periodic amplitude change of the flow rate. The response amplitude detection unit 2205 outputs information indicating a change in the periodic amplitude of the steam flow rate to the gradient calculation unit 2206. Then gradient calculation unit 2206, a change in each period of the air flow, it compares the change of every one period of the steam flow rate corresponding, in the steam flow rate to changes in the air flow rate for each minute time (Delta] g _air) The sensitivity, that is, the gradient ((Δg _steam ) / (Δg _air )) is calculated. The gradient calculation unit 2206 outputs the calculated value of the gradient to the subtraction unit 2209.

Further, the gradient setting unit 2203 calculates a set value of the gradient corresponding to the set value of the predetermined m _B and the predetermined steam flow rate. The gradient setting unit 2203 outputs the gradient setting value to the subtraction unit 2209.

Next, the subtraction unit 2209 calculates the deviation (gradient setting value-gradient calculation value) between the gradient setting value output by the gradient setting unit 2203 and the gradient calculation value output by the gradient calculation unit 2206. The value is output to the PI control unit 2204. Next, the PI control unit 2204 calculates the correction amount 11 of the air flow rate so that the deviation between the set value of the gradient and the calculated value of the gradient becomes 0 by PI control. The PI control unit 2204 outputs the correction amount 11 to the subtraction unit 2208.

The air flow rate periodic change generation unit 2202 continuously calculates the periodic increase / decrease value of the air flow rate, and outputs the value to the subtraction unit 2208. The subtraction unit 2208 subtracts the correction amount 11 calculated by the PI control unit 2204 from the increase / decrease value calculated by the air flow rate cycle change generation unit 2202, calculates the correction amount 12, and outputs the correction amount 12 to the addition unit 2207. Next, the addition unit 2207 adds the correction amount 12 to the air flow rate set value calculated by the basic control unit 2201 to calculate the air flow rate set value A22-1.

The air flow rate control unit 22 controls the blower 4 and valves 8A to 8E based on the newly calculated air flow rate set value A22-1. The air flow rate control unit 22 repeats the above process. As a result, the air flow rate is calculated so that the steam flow rate is constant and the gradient is constant, and the operation of the garbage incineration facility 100 is controlled by this air flow rate.

For example, if the calculated gradient value (actual gradient) is insufficient with respect to the set value of the gradient, the PI control unit 2204 calculates the correction amount 11 for reducing the air flow rate. When the air flow rate is reduced, the steam flow rate is reduced accordingly, and the set value of the steam flow rate is insufficient. Then, the dust supply amount control unit 23 controls the operation of the pusher 2 to increase the dust supply amount. Dust is additionally supplied, so eventually dried, by fuel of the waste stock m _B is increased, the steam flow rate is restored by adjusting the air flow rate accordingly, the lack of slope is eliminated ..

On the contrary, if the actual gradient exceeds the set value of the gradient, the PI control unit 2204 calculates the correction amount 11 for increasing the air flow rate. When the air flow rate increases, the combustion of garbage is promoted and the steam flow rate increases. Then, the dust supply amount control unit 23 controls the operation of the pusher 2 to reduce the dust supply amount. When the increase in the fuel of the waste stock m _B can be suppressed, an increase in steam flow rate is suppressed, by adjusting the air flow rate accordingly, the excess of the gradient is eliminated.
In this way, it is possible to steam flow and slope becomes each setting value, controls the stock m _B and the combustion velocity of the fuel of the waste to a predetermined value.

According to this embodiment as described above, while managing the predetermined value stock m _B of the fuel of the waste, by combustion speed is constant, stabilizing the combustion state in the incinerator facility 100, The amount of steam supplied to the power plant can be controlled to a desired value. As a result, for example, continuous operation can be performed in a state close to the upper limit of the equipment capacity of the waste incinerator 100, and the capacity factor of the equipment is improved. In addition, by stabilizing combustion, emissions of NOX, CO, etc. can be suppressed.

The gradient setting value may be a constant value or may be changed according to the steam flow rate. Furthermore, if the nature of the dust can be detected, it may be changed accordingly. In the present embodiment, it has been described that the set value of the gradient is changed according to the steam flow rate, but this is an example. In addition to the steam flow rate, the setting value of the gradient may be changed according to a numerical value representing the operating state of the waste incinerator, for example, a set value of the power generation output. This also applies to the embodiments described later.

<Second embodiment>
In the first embodiment, the air flow rate is controlled based on the gradient, but the amount of dust supplied may be controlled based on the gradient.
(composition)
FIG. 4 is a diagram showing an example of the functional configuration of the control device according to the second embodiment.
FIG. 4 shows the configuration of the air flow rate control unit 22A and the dust supply amount control unit 23A among the control devices 20A according to the present embodiment. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.
The air flow rate control unit 22A includes a basic control unit 2201, an air flow rate cycle change generation unit 2202, and an addition unit 2207. These configurations are the same as in the first embodiment.

The dust supply amount control unit 23A includes a dust supply control unit 2301, a gradient setting unit 2302, a PI control unit 2303, a response amplitude detection unit 2304, a gradient calculation unit 2305, an addition unit 2306, and a subtraction unit 2307. To be equipped.

The dust supply control unit 2301 calculates the amount of dust supplied (dust required value) so that the measured value of the steam flow rate measured by the steam flow sensor 11 becomes a predetermined set value. For example, when the measured value of the steam flow rate is less than the set value, the amount of dust supplied is increased, and when the measured value of the steam flow rate exceeds the set value, the required value of dust is calculated so as to decrease the amount of dust supplied.

The gradient setting unit 2302 calculates a gradient setting value corresponding to the steam flow rate setting value. The set value of the gradient is predetermined for each value of the steam flow rate, for example.

The PI control unit 2303 calculates the correction amount 21 of the required value of dust so that the deviation becomes 0 based on the deviation between the set value of the gradient and the calculated value of the gradient (actual gradient).

Similar to the response amplitude detection unit 2205 of the first embodiment, the response amplitude detection unit 2304 detects a periodic change in the amplitude of the steam flow rate based on, for example, the equation (4).

Gradient calculating unit 2305, similarly to the response amplitude detection unit 2205 of the first embodiment, the amount of change in a minute time amplitude response amplitude detector 2304 detects (Delta] _{g? Steam)} and the amount of change in the short time of the air flow rate (Delta] g _The gradient (Δg _flow ) / (Δg _air ) is calculated based on the air).

(motion)
In the air flow rate control unit 22A, the basic control unit 2201 calculates the set value of the air flow rate and outputs this value to the addition unit 2207. The air flow rate cycle change generation unit 2202 continuously calculates the increase / decrease value of the air flow rate based on the equation (3), and outputs this value to the addition unit 2207. The adding unit 2207 adds the set value of the air flow rate and the increase / decrease value of the air flow rate. The air flow rate control unit 22A sets the added value as the air flow rate set value A22-2 of the present embodiment, and controls the operation of the blower 4 and the opening degrees of the valves 8A to 8E. As a result, the air flow rate supplied to the air boxes 5A to 5E changes in a sinusoidal shape at a predetermined cycle. The air flow rate control unit 22A repeats this operation.

The dust supply amount control unit 23A acquires the measured value of the steam flow rate measured by the steam flow rate sensor 11 through the data acquisition unit 21. The dust supply control unit 2301 of the dust supply amount control unit 23A calculates a dust request value such that the measured value of the steam flow rate becomes the set value of the steam flow rate based on the set value and the measured value of the steam flow rate. The dust supply control unit 2301 outputs the dust request value to the addition unit 2306.

Further, the response amplitude detection unit 2304 calculates the change in the periodic amplitude of the steam flow rate with respect to the periodic change in the air flow rate, and outputs this information to the gradient calculation unit 2305. Next, the gradient calculation unit 2305 compares the change in the air flow rate set value A22-2 for each cycle with the corresponding change in the steam flow rate for each cycle, and the gradient for each minute time ((Δg _steam ) / (Δg _air )) is calculated. The gradient calculation unit 2305 outputs the calculated value of the gradient to the subtraction unit 2307.
Further, the gradient setting unit 2302 calculates a gradient set value corresponding to the steam flow rate set value, and outputs this value to the subtraction unit 2307.

Next, the subtraction unit 2307 calculates the deviation (gradient setting value-gradient calculation value) between the gradient setting value calculated by the gradient setting unit 2302 and the gradient calculation value calculated by the gradient calculation unit 2305. The value is output to the PI control unit 2303. Next, the PI control unit 2303 calculates the correction amount 21 of the dust request value so that the deviation between the gradient set value and the gradient calculated value becomes 0 by PI control. The PI control unit 2303 outputs the correction amount 21 to the addition unit 2306. Next, the addition unit 2306 adds the correction amount 21 to the dust request value calculated by the dust supply control unit 2301 to calculate the dust request value A23-2.

The dust supply amount control unit 23A calculates the extension length of the pusher 2 based on the newly calculated dust request value A23-2, generates a control signal for extending the pusher 2 by this length, and generates a control signal to extend the pusher 2. To control. The garbage supply amount control unit 23A repeats the above process.

As a result, the required value of dust is calculated so that the steam flow rate is constant and the gradient is constant. The value of the stock m _B of the fuel of the waste is stabilized, the combustion state of refuse incineration facility 100 is stabilized.

<Third Embodiment>
First embodiment In the second embodiment, in order to manage the stock m _B of the fuel of the dust, was modified by sinusoidal predetermined period of air flow. In the third embodiment, this process is simplified so that the air flow rate does not have to be changed by a sine wave or a fixed period.
(composition)
FIG. 5 is a diagram showing an example of the functional configuration of the control device according to the third embodiment.
FIG. 5 shows the configuration of the air flow rate control unit 22B in the control device 20B according to the present embodiment.
The data acquisition unit 21, the dust supply amount control unit 23, and the dust transfer control unit 24 are the same as those described with reference to FIG.
As shown in the figure, the air flow rate control unit 22B includes a basic control unit 2201, an air flow rate change unit 2210, a correlation coefficient setting unit 2211, a PI control unit 2212, a steam flow rate response model 2213, and a correlation coefficient. A calculation unit 2214, an addition unit 2215, a subtraction unit 2216, and a subtraction unit 2217 are provided.

The basic control unit 2201 outputs a set value of the air flow rate as in the first embodiment.
The air flow rate changing unit 2210 calculates an increase / decrease value for increasing / decreasing the air flow rate. This increase / decrease value does not need to be periodic as in the first embodiment or generated so that the waveform of the air flow rate draws a sine wave, and is arbitrary within a range that does not adversely affect the operation of the garbage incinerator 100. It may be the amount of change in.

The correlation coefficient setting unit 2211 sets a predetermined value determined for the _{gradient ((Δg steam} ) / (Δg _air )) corresponding to the set value of the steam flow rate as the set value of the correlation coefficient. The set value of the correlation coefficient is predetermined for each set value of the steam flow rate. Here, the correlation coefficient, the correlation coefficient of the variation Delta] g _{^? Steam} estimate of the steam flow rate obtained by the response model of the steam flow to changes in air flow rate, the amount of change Delta] _{g? Steam} of the measurement values of the steam flow rate Is.

The PI control unit 2212 sets the correlation coefficient to 0 based on the deviation between the set value of the correlation coefficient and the calculated value of the correlation coefficient calculated based on the actual steam flow rate, the actual air flow rate, and the response model. Calculate the air flow rate so that

The response model 2213 is represented by the following equation (5).

Here, t is an integer representing the sampling time. Δg ^ _steam is an estimated value of the deviation of the steam flow rate from the equilibrium point. Delta] g _air is deviation from the equilibrium point of the air flow rate. The equilibrium point is replaced by, for example, a time average value. {A1, a2, ...} And {b1, b2, ...} are constants of the response model and are calculated in advance. The constant of the response model may be changed according to the set value of the steam flow rate. z ^-1 represents the previous sampling time. Further, Δg ^ _steam [t] and Δg _air [t] are defined by deviations from the expected value E as follows, where t is the time.
Δg ^ _steam [t] = g _steam [t] -E (g _steam )
_{Δg air [t] = g air} [t] -E (g air)
Further, since the gradient of the steam flow rate with respect to the air flow rate ((Δg _steam ) / (Δg _air )) is proportional to the correlation coefficient between Δg _{^ steam and Δg steam} , the following equation (6) holds. The right side of equation (6) is the correlation coefficient between Δg _{^ steam and Δg steam.}

Here, Cov stands for covariance and Var stands for variance. That is, when the expected values of x and y are expressed by E (x) and E (y) for the vectors x and y of consistent sizes, the following equation (7) is performed.

The correlation coefficient calculation unit 2214 calculates the correlation coefficient between Δg _{^ steam and Δg steam} from the above equation (7).

(motion)
First, the basic control unit 2201 calculates a set value of the air flow rate and outputs this value to the addition unit 2215. The air flow rate changing unit 2210 calculates the changed value of the air flow rate and outputs this value to the subtracting unit 2216. The subtraction unit 2216 subtracts the correction amount 31 (initial value = 0) from the changed value to calculate the correction amount 32. The subtraction unit 2216 outputs the correction amount 32 to the addition unit 2215. The addition unit 2215 adds the set value of the air flow rate and the correction amount 32. The air flow rate control unit 22B sets the added value as the air flow rate set value A22-3 of the present embodiment. The air flow rate control unit 22B controls the operation of the blower 4 and the opening degrees of the valves 8A to 8E based on the air flow rate set value A22-3.

Then response model 2213, type Δg _air [t] based on the air flow rate set value A22-3, to calculate the estimated value of the steam flow _{Δg ^ steam [t],} the correlation coefficient calculating unit this value Output to 2214. Further, the air flow rate control unit 22B acquires the measured value of the steam flow rate measured by the steam flow rate sensor 11 through the data acquisition unit 21. Next, the correlation coefficient calculation unit 2214 calculates the correlation coefficient of Δg _steam [t] and Δg ^ _steam [t] by the equation (7). The correlation coefficient calculation unit 2214 outputs the calculated value of the correlation coefficient to the subtraction unit 2217.
Further, the correlation coefficient setting unit 2211 calculates the setting value of the correlation coefficient corresponding to the set value of the steam flow rate, and outputs this value to the subtraction unit 2217.

Next, the subtraction unit 2217 is a deviation between the correlation coefficient setting value calculated by the correlation coefficient setting unit 2211 and the correlation coefficient calculation value calculated by the correlation coefficient calculation unit 2214 (correlation coefficient setting value-. The calculated value of the correlation coefficient) is calculated, and the calculated deviation is output to the PI control unit 2212.
Next, the PI control unit 2212 calculates the correction amount 31 of the air flow rate so that the deviation between the set value of the correlation coefficient and the calculated value of the correlation coefficient becomes 0 by PI control. The PI control unit 2212 outputs the correction amount 31 to the subtraction unit 2216.

The air flow rate changing unit 2210 calculates the changed value of the air flow rate and outputs it to the subtracting unit 2216. Next, the subtraction unit 2216 subtracts the correction amount 31 calculated by the PI control unit 2212 from the change value calculated by the air flow rate change unit 2210, and calculates the correction amount 32. The subtraction unit 2216 outputs the correction amount 32 to the addition unit 2215. Next, the addition unit 2215 adds the correction amount 32 to the air flow rate set value calculated by the basic control unit 2201 to calculate the air flow rate set value A22-3.

The air flow rate control unit 22B controls the blower 4 and valves 8A to 8E based on the newly calculated air flow rate set value A22-1. The air flow rate control unit 22B repeats the above process. As a result, the air flow rate is calculated so that the steam flow rate is constant and the correlation coefficient is constant, and the operation of the garbage incineration facility 100 is controlled by this air flow rate.

According to this embodiment, by a simple control than the first embodiment, while managing stock m _B of dust and the fuel to a predetermined value, the combustion state can be controlled constant (correlation coefficient) The garbage incinerator 100 can be operated in a stable combustion state.

<Fourth Embodiment>
In the fourth embodiment, the response model of the steam flow rate to the air flow rate is identified from the past value of the air flow rate and the past value of the steam flow rate. Then, the gradient is calculated from the identified response model.
(composition)
FIG. 6 is a diagram showing an example of the functional configuration of the control device according to the fourth embodiment.
FIG. 6 shows the configuration of the air flow rate control unit 22C in the control device 20C according to the present embodiment.
The data acquisition unit 21, the dust supply amount control unit 23, and the dust transfer control unit 24 are the same as those described with reference to FIG.

As shown in the figure, the air flow rate control unit 22C subtracts the basic control unit 2201, the air flow rate change unit 2210, the gradient setting unit 2203, the PI control unit 2204, the model identification unit 2218, and the gradient calculation unit 2219. A unit 2220, an addition unit 2221, and a subtraction unit 2222 are provided. The basic control unit 2201, the gradient setting unit 2203, and the PI control unit 2204 are as described in the first embodiment. The air flow rate changing unit 2210 is as described in the third embodiment.
The model identification unit 2218 identifies the coefficient of the model represented by the following equation (8).

Specifically, the response model of the steam flow rate to the above air flow rate is set to the past values of the air flow rate {g_air [t-1], g_air [t-2], ...} And the past values of the steam flow rate. From {g_steam [t-1], g_steam [t-2], ...}, use the least squares method or the like to obtain the model coefficients {a1, a2, ...} and {b1, b2, ...}. To identify.
For example, the model identification unit 2218 first constructs a matrix of the following equation (9) from the past values of the air flow rate and the past values of the steam flow rate.

Then, the model coefficients {a1, a2, ...} And {b1, b2, ...} Can be obtained by the following equation (10) by the least squares method.

_{The gradient calculation unit 2219 calculates the gradient ((Δg steam} ) / (Δg _air )) based on the model coefficient identified by the model identification unit 2218 and the model of the equation (9). In addition, T of the formula (9) corresponds to the cycle of changing the air flow rate of the first embodiment, and for example, a value of about 1 minute is set. T _S is the period of sampling. j is an imaginary unit.

(motion)
First, the basic control unit 2201 calculates the set value of the air flow rate and outputs this value to the addition unit 2221. The air flow rate changing unit 2210 calculates the changed value of the air flow rate and outputs this value to the subtracting unit 2222. The subtraction unit 2222 subtracts the correction amount 41 (initial value = 0) from the changed value to calculate the correction amount 42. The subtraction unit 2222 outputs the correction amount 42 to the addition unit 2221. The addition unit 2221 adds the set value of the air flow rate and the correction amount 42. The air flow rate control unit 22C sets the value after addition as the air flow rate set value A22-4 of the present embodiment. The air flow rate control unit 22C controls the operation of the blower 4 and the opening degrees of the valves 8A to 8E based on the air flow rate set value A22-4.

Next, the model identification unit 2218 acquires information on the latest steam flow rate (for example, from X minutes before to the present) and the air flow rate at that time in the past, and the response model of the steam flow rate to the air flow rate (Equation (8)). ) Is identified. The model identification unit 2218 identifies the response model by, for example, equations (9) and (10). The model identification unit 2218 outputs the model coefficients {a1, a2, ...} And {b1, b2, ...} obtained by identifying the response model to the gradient calculation unit 2219. Next, the gradient calculation unit 2219 calculates the gradient ((Δg _steam ) / (Δg _air )) by the model coefficient and the equation (8). The gradient calculation unit 2219 outputs the calculated value of the gradient to the subtraction unit 2220.

Further, the gradient setting unit 2203 calculates a set value of the gradient corresponding to a predetermined m _B and the predetermined steam flow rate. The gradient setting unit 2203 outputs the gradient setting value to the subtraction unit 2220.

Next, the subtraction unit 2220 calculates the deviation (gradient setting value-gradient calculation value) between the gradient setting value output by the gradient setting unit 2203 and the gradient calculation value output by the gradient calculation unit 2219. The value is output to the PI control unit 2204. Next, the PI control unit 2204 calculates the correction amount 41 of the air flow rate so that the deviation between the set value of the gradient and the calculated value of the gradient becomes 0 by PI control. The PI control unit 2204 outputs the correction amount 41 to the subtraction unit 2222.

The air flow rate changing unit 2210 calculates the changed value of the air flow rate and outputs it to the subtracting unit 2222. Next, the subtraction unit 2222 subtracts the correction amount 41 calculated by the PI control unit 2212 from the change value calculated by the air flow rate change unit 2210, and calculates the correction amount 42. The subtraction unit 2222 outputs the correction amount 42 to the addition unit 2221. Next, the addition unit 2221 adds the correction amount 42 to the air flow rate set value calculated by the basic control unit 2201 to calculate the air flow rate set value A22-4.

The air flow rate control unit 22C controls the blower 4 and valves 8A to 8E based on the newly calculated air flow rate set value A22-4. The air flow rate control unit 22C repeats the above process. As a result, the air flow rate is calculated so that the steam flow rate is constant and the correlation coefficient is constant, and the operation of the garbage incineration facility 100 is controlled by this air flow rate.

According to this embodiment, the same effect as that of the first embodiment can be obtained. In addition, since the response model is identified one after another, even when the combustion rate of dust is changed between daytime and nighttime, control performance similar to that of steady operation can be obtained in the transient state.

<Fifth Embodiment>
As has been described, according to the first embodiment to fifth embodiment, by managing the value of the stock m _B of dried fuel of the waste, to stabilize the combustion state of refuse incinerators 100 be able to. However, when dust is supplied by the reciprocating operation of the pusher 2, the amount of dust supplied becomes intermittent, which causes the steam flow rate to fluctuate. As shown in FIG. 1, the pusher 2 is located at the lower part of the dust layer, and when it stretches, it pushes the dust around it to the stoker 3. The stroke of the pusher 2 has a limit, and when it is fully extended, dust cannot be pushed out any more. Therefore, after the pusher is fully extended, it is retracted once and then extended again. While the pusher 2 is pulled back, the supply of dust is interrupted (that is, the supply of dust becomes intermittent), which affects the steam flow rate. The air flow rate control unit 22D according to the fifth embodiment alleviates the fluctuation of the steam flow rate caused by the reciprocating operation.

(composition)
FIG. 7 is a diagram showing an example of the functional configuration of the control device according to the fifth embodiment.
FIG. 7 shows the configuration of the air flow rate control unit 22D in the control device 20D according to the present embodiment.
The data acquisition unit 21, the dust supply amount control unit 23, and the dust transfer control unit 24 are the same as those described with reference to FIG.
As shown in the figure, the air flow rate control unit 22D includes an air flow rate control unit 22, a correction amount calculation unit 2224, and a subtraction unit 2225.

The air flow rate control unit 22 is the air flow rate control unit 22 described in the first embodiment. Although the air flow rate control unit 22 is shown as an example in FIG. 7, any of the air flow rate control units 22A to 22C may be used instead of the air flow rate control unit 22. Alternatively, it may be the basic control unit 2201.
The correction amount calculation unit 2224 calculates the correction amount of the air flow rate according to the extension speed of the pusher 2. (1) Here, the input feed rate of the waste (extension rate of the pusher 2 (m / s)), providing a numerical model P ₁ to output the variation value of the steam flow it brings. For model P ₁ , for example, input values and output values may be collected from the operation data of the garbage incinerator 100 and identified by the least squares method, or a plurality of models may be used depending on the operating state of the garbage incinerator 100. You may prepare and use the one that suits the actual operating condition. (2) then receives the air flow rate set point, providing a model P ₂ to output the steam flow variations it brings. (3) Then, the equation (11) calculates the air flow rate feedforward compensation model _{P 3} from the model _{P 1} and Model _{P 2.} Correction amount calculation unit 2224 calculates the correction amount of the air flow from the stretch rate and the model P ₃ of the pusher 2, corrects the set value of the air flow the air flow control unit 22 is set.
^{_{P 3 = P 2 -1 · P}} 1 ···· (11)

(motion)
First, the air flow rate control unit 22 calculates the set value A22-1 of the air flow rate, and outputs this value to the subtraction unit 2225. Further, the correction amount calculation unit 2224 acquires the extension speed of the pusher 2 from the dust supply amount control unit 23. Correction amount calculation unit 2224 inputs the spreading speed of the pusher 2 in the model _{P 3,} to obtain the output of the model _{P 3,} and the correction amount 51. The correction amount calculation unit 2224 outputs the correction amount 51 to the subtraction unit 2225. For example, when the pusher 2 is pulled back, the correction amount 51 becomes a negative value. The subtraction unit 2225 subtracts the correction amount 51 from the set value A22-1 of the air flow rate. The air flow rate control unit 22D sets the subtracted value as the air flow rate set value A22-5 of the present embodiment. The air flow rate control unit 22D controls the operation of the blower 4 and the opening degrees of the valves 8A to 8E based on the air flow rate set value A22-4.

It is known that the time delay from the air flow rate to the fluctuation of the steam flow rate is less than half of the time delay until the steam flow rate fluctuates due to the supply of dust. Therefore, according to the present embodiment, for example, if the pusher 2 reverses from extension to pull-in, that is, at the same time that the dust supply suddenly becomes 0, and at the same time the air flow rate is fed-forward compensated, fluctuations in the steam flow rate can be prevented. Or the fluctuation of steam flow rate can be mitigated.

The fifth embodiment can be combined with any of the first to fourth embodiments.

<Sixth Embodiment>
In a general garbage incinerator, for example, when the steam flow rate becomes equal to or less than a set value, the control device outputs an operation command value ON to the pusher. The pusher extends at a predetermined extension rate to supply the waste to the furnace. When the pusher is fully extended, the controller pulls the pusher back. The pusher repeats this operation until the operation command value OFF is commanded. In this way, the dust is intermittently supplied in a constant pattern. On the other hand, in the present embodiment, the extension length of the pusher faithful to the dust required value required for compensating for the fluctuation of the steam flow rate is determined, and the variation in the dust supply amount is suppressed.

(composition)
FIG. 8 is a diagram showing an example of the functional configuration of the control device according to the sixth embodiment. FIG. 9 is a diagram showing an example of the functional configuration of the conventional control device according to the sixth embodiment. The only difference between FIG. 8 showing the present embodiment and FIG. 9 showing the prior art is the pusher extension control unit. In this embodiment, the pusher extension control unit 2308a is used. In the prior art, the pusher extension control unit 2308 is used.

FIG. 8 shows the configuration of the dust supply amount control unit 23K in the control device 20K according to the sixth embodiment. The configuration of the air flow rate control unit is any of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.
The dust supply amount control unit 23K includes a dust supply control unit 2301, a pusher extension control unit 2308a, a pull-in command unit 2309, a speed change unit 2312, and a second speed change unit 2312a.

FIG. 9 shows the configuration of the dust supply amount control unit 23E in the control device 20E according to the conventional technique according to the sixth embodiment. The configuration of the air flow rate control unit is any of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG. The dust supply amount control unit 23E shown in FIG. 9 includes a dust supply control unit 2301, a pusher extension control unit 2308, a pull-in command unit 2309, a speed change unit 2312, and a second speed change unit 2312a.

The dust supply control unit 2301 calculates a dust requirement value such that the measured value of the steam flow rate becomes the set value of the steam flow rate based on the set value and the measured value of the steam flow rate. The calculated garbage request value is a continuous value.
The pusher extension control unit 2308a and the pusher extension control unit 2308 control the operation of the pusher 2 at the time of extension. The difference between these functions will be described later with reference to FIGS. 10 and 11.
When the pusher 2 is extended, the speed changing unit 2312 sets the extension speed to a speed determined by the second speed changing unit 2312a, and when the pusher 2 is pulled in, the speed changing unit 2312 is set to a predetermined pulling speed of the pusher 2. The second speed changing unit 2312a sets a predetermined extension speed setting when the extension command is ON and 0 when the extension command is OFF, based on the extension command output by the pusher extension control unit 2308 or the pusher extension control unit 2308a. , Output as extension speed command.
The pull-in command unit 2309 controls the pull-in operation of the pusher 2. For example, when the pusher 2 passes through the end point limit switch provided at the position where the pusher 2 passes when it is fully extended during extension, the pull-in command to the pusher 2 is turned on. Further, when the origin limit switch provided near the position (origin) where the pusher 2 is completely pulled back is passed during pulling, the pulling command to the pusher 2 is turned off.

See FIG. 10 here. FIG. 10 is a diagram illustrating conventional dust supply amount control.
Ideally, the dust is supplied according to the dust required value calculated by the dust supply control unit 2301. However, in many cases, the dust required value is converted into an operation command of the pusher 2, and when the signal is ON, the dust is completely extended at a constant speed, and then the operation is repeated so as to be completely retracted. This situation is shown in FIG. FIG. 10A shows a conventional pusher extension control unit 2308. FIG. 10B shows the relationship between the conventional dust requirement value x and the extension command u of the pusher 2. As shown in FIGS. 10A and 10B, the pusher extension control unit 2308 outputs an ON command so as to extend the pusher 2 at a constant speed as an extension command u when the dust request value x becomes less than the ON threshold value. Then, when the OFF command value is reached, the OFF command is output as the extension command u. When the pusher 2 is completely extended while the ON command is being output, the pull-in command output by the pull-in command unit 2309 is turned ON and the pusher 2 is pulled in. In such an operation method, there is an error between the actual amount of dust supplied and the required value of dust.

On the other hand, in the present embodiment shown in FIG. 8, the pusher extension control unit 2308a reduces the above-mentioned error by extending the pusher 2 in small steps according to the required value of dust. For example, if the extension length with respect to the required dust value is X, the pusher 2 extends by X and stops. Then, when the next garbage request value is issued, it is extended by the amount of the garbage request value.

(motion)
First, the dust supply control unit 2301 acquires the set value of the steam flow rate and the measured value of the steam flow rate, and calculates the dust required value so that the actual steam flow rate becomes the set value. The dust supply control unit 2301 outputs the dust request value to the pusher extension control unit 2308. The dust supply control unit 2301 calculates a dust request value at predetermined time intervals, and outputs this value to the pusher extension control unit 2308. The pusher extension control unit 2308 calculates an extension command to the pusher 2. Here, reference is made to FIG.

FIG. 11 is a first diagram illustrating the dust supply amount control according to the sixth embodiment.
As shown in FIG. 11, the pusher extension control unit 2308a includes an integration unit 238a, a subtraction unit 238b, and a command unit 238c. The integrating unit 238a converts the required dust value (m ³ / s) into the pusher extension length. The integrating unit 238a integrates the time by dividing the required value of dust by the cross-sectional area A of the pusher. This value is a converted value of the extension length of the pusher 2. The integrating unit 238a outputs the converted value of the extension length of the pusher 2 to the subtracting unit 238b. The subtraction unit 238b calculates the deviation between the converted value of the pusher 2 extension length and the actual extension length of the pusher, and outputs the deviation to the command unit 238c. The actual extension length of the pusher is calculated based on, for example, an extension command. The command unit 238c outputs an extension command to the pusher 2 when the deviation exceeds a predetermined ON threshold length. In response to this command, Pusher 2 begins to stretch. The above process is repeated even during the extension of the pusher 2. The deviation decreases as the pusher 2 extends. When the deviation becomes less than a predetermined OFF threshold length, the command unit 238c turns off the extension command. Then, the pusher 2 stops at that position. When the pusher extension control unit 2308a acquires the next dust request value, the pusher extension control unit 2308a repeats the same process. As a result, the pusher 2 is gradually extended by the length corresponding to the required dust value.

When the pusher 2 passes the end point limit switch, the pull-in command unit 2309 outputs a pull-in ON command to the pusher 2. The pusher 2 is pulled back toward the origin. When the pusher 2 is pulled back until it passes through the origin limit switch, the pull-in command unit 2309 outputs a pull-in OFF command to the pusher 2. The pusher 2 stops and starts stretching again under the control of the pusher extension control unit 2308a. After the pusher 2 is fully extended, the pusher 2 must be pulled back. During the pull-in period, the required value of garbage and the actual supply amount deviate from each other. In order to minimize this deviation, the pusher 2 is pulled in at the maximum speed.

FIG. 12 shows a state of the extension operation of the pusher 2 according to the present embodiment.
FIG. 12 is a second diagram illustrating the dust supply amount control according to the sixth embodiment.
FIG. 12A shows the relationship between the required dust value x and the extension command u of the pusher 2. FIG. 12B shows the relationship between the extension command u in FIG. 12A and the extension length of the pusher 2.
First, it is assumed that the pusher 2 is stopped.
Upon receiving the dust required value, the integrating unit 238a integrates the dust required value in time in the pusher extension control unit 2308a, and the output of the integrating unit 238a increases like a lamp. Eventually, the deviation between the output of the integrating unit 238a and the extension length of the pusher 2 exceeds the ON threshold length X defined by the command unit 238c, the extension command u becomes ON, and the pusher 2 extends (FIG. 12 (b). )). As a result, the deviation decreases over time. Then, when the deviation becomes less than the OFF threshold length determined by the command unit 238c, the extension command u is turned OFF and the pusher 2 is stopped. In this way, the one-time extension length of the pusher 2 can be roughly specified by a value of X. In the conventional method, when the ON command is output, the pusher 2 extends to a predetermined length, and a large amount of dust is supplied to the combustion chamber 6 at a time, resulting in disturbance to combustion. On the other hand, in the present embodiment, one supply of dust can be determined by the ON threshold length X determined by the command unit 238c. For example, if the ON threshold length X is set to about 1/10 of the maximum extension length of the pusher 2, the dust is supplied into the furnace in small portions of 1/10 of the conventional one, and as a result, it is sent to combustion. Disturbance can be reduced.

As described above, according to the present embodiment, since the pusher 2 follows the time change of the required value of the dust, the dust can be supplied according to the required value of the dust as compared with the conventional method.

<Seventh Embodiment>
In the sixth embodiment, after the pusher 2 is completely extended, it is pulled back at the maximum speed. However, no matter how fast it is pulled in, the amount of garbage supplied will be insufficient during the pulling in. Therefore, in the present embodiment, the acceleration section is set at the end of the extension, and the extension speed is increased to compensate for the decrease in the amount of dust supplied.

(composition)
FIG. 13 is a diagram showing an example of the functional configuration of the control device according to the seventh embodiment.
FIG. 13 shows the configuration of the dust supply amount control unit 23F in the control device 20F according to the present embodiment. The configuration of the air flow rate control unit is any of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.

As shown in the figure, the dust supply amount control unit 23F includes a dust supply control unit 2301, a pull-in command unit 2309, a speed conversion unit 2310, a speed conversion position calculation unit 2311, and a speed change unit 2312.
The dust supply control unit 2301 and the pull-in command unit 2309 are the same as those described in the sixth embodiment.
The speed conversion unit 2310 converts the dust request value output by the dust supply control unit 2301 into the extension speed of the pusher 2. For example, if the dust request value is large, the speed conversion unit 2310 sets the extension speed of the pusher 2 to a higher speed, and if the next dust request value is small, the speed conversion unit 2310 sets the extension speed of the pusher 2 to a lower speed. do. The speed conversion unit 2310 may determine the extension speed based on, for example, a table or the like that defines the relationship between the required dust value and the extension speed.

The speed conversion position calculation unit 2311 calculates a position for switching the extension speed of the pusher 2 to the maximum speed, and when the pusher 2 reaches this position, instructs the speed conversion unit 2310 to maximize the extension speed of the pusher 2. .. Regarding the position to switch the speed, for example, if the extension speed is the maximum pulling speed v _max , the average speed of extension is v _av, and the stroke of extension is L, the starting point position of the acceleration section (distance from the origin). L _PLUIS is given by the following equation (12).

_{Here, v max} is sufficiently larger than _{v av,} never L _PLUIS is negative.

When the pusher 2 is extended, the speed changing unit 2312 instructs the pusher 2 to set the extension speed to a speed determined by the speed conversion unit 2310 and to set the pulling speed of the pusher 2 to the maximum speed when the pusher 2 is pulled in.

(motion)
First, the dust supply control unit 2301 calculates a dust request value such that the measured value of the steam flow rate approaches the set value of the steam flow rate. The dust supply control unit 2301 outputs the dust request value to the speed conversion unit 2310. The dust supply control unit 2301 calculates a dust request value at predetermined time intervals, and outputs this value to the speed conversion unit 2310. The speed conversion unit 2310 determines the extension speed of the pusher 2.

Further, the speed conversion position calculation unit 2311 calculates the start point position L _PLUIS of the speed-increasing section using the equation (12), and determines whether or not the pusher 2 has _{passed the L PLUIS.} If the pusher 2 has _{not passed through the L PLUIS} , the speed conversion position calculation unit 2311 outputs an OFF signal to the speed conversion unit 2310. When the OFF signal is acquired, the speed conversion unit 2310 outputs the extension speed calculated based on the dust request value to the speed change unit 2312. The speed changing unit 2312 outputs the acquired extension speed as a speed command value to the pusher 2. The pusher 2 that has received the speed command continues to extend until it passes through _{L PLUIS} while changing its extension speed based on the speed command value determined according to the dust request value.

When the pusher 2 has _{passed through L PLUIS} , the speed conversion position calculation unit 2311 outputs an ON signal to the speed conversion unit 2310. When the ON signal is acquired, the speed conversion unit 2310 outputs the maximum speed v _max to the speed change unit 2312 instead of the extension speed calculated based on the dust request value. The speed changing unit 2312 _{outputs the maximum speed v max} as a speed command value to the pusher 2. The pusher 2 continues to extend at the _{maximum speed v max} until it passes the end point limit switch.

When the pusher 2 passes the end point limit switch, the pull-in command unit 2309 outputs a pull-in ON command to the speed change unit 2312. The speed changing unit 2312 pulls back the pusher 2 at the _{maximum pulling speed −V max.} When the pusher 2 is pulled back until it passes through the origin limit switch, the pull-in command unit 2309 outputs a pull-in OFF command to the speed change unit 2312. The speed changing unit 2312 again outputs the extension speed instructed by the speed conversion unit 2310 to the pusher 2, and the next extension operation is started.

According to the present embodiment, _{it is possible to shorten the time until the pusher 2 passes through the position of the L PLUIS} , extends, and is pulled back to the origin. Therefore, for example, even if the amount of dust supplied by the pusher 2 is the same between _{L PLUIS and the maximum extension position, the same amount of time is required even after L PLUIS} is extended at a speed based on the required dust value. Comparing the amount of garbage supplied per unit, it is possible to supply more garbage, so that it is possible to eliminate and alleviate the shortage of garbage supply while pulling back the pusher.
The present embodiment can also be combined with the sixth embodiment.

<Eighth Embodiment>
In the seventh embodiment, the extension speed was increased at the end of the extension of the pusher 2 so as to offset the decrease in the dust supply during the period for pulling back the pusher 2. However, for example, when the amount of heat of dust varies and the amount of heat of dust happens to be uneven, the steam flow rate may have a positive deviation from the set value. If the pusher 2 is immediately pulled back in such a state, the speed increase as in the seventh embodiment becomes unnecessary. For example, it is known that the steam flow rate exceeds the set value, and that the nature of the incinerator is that reducing the supply of waste reduces the steam flow rate. If the pusher is pulled back at such a timing, the dust supply becomes 0 during the pulling, and the steam flow rate becomes lower than the previous value. Therefore, the pull-in helps to eliminate the excess steam flow rate. In this way, if the fluctuation of the steam flow rate is eliminated by reducing the dust supply, it is beneficial to pull back the pusher 2 at that timing.

(composition)
FIG. 14 is a diagram showing an example of the functional configuration of the control device according to the eighth embodiment.
FIG. 14 shows the configuration of the dust supply amount control unit 23G in the control device 20G according to the present embodiment. The configuration of the air flow rate control unit is any of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.
As shown in the figure, the dust supply amount control unit 23G includes a dust supply control unit 2301, a pull-in command unit 2309, a speed change unit 2312, a steam flow rate fluctuation calculation unit 2314, a steam flow rate deviation calculation unit 2315, and a pull-in determination. A unit 2316 and a unit are provided.
The dust supply control unit 2301 and the pull-in command unit 2309 are the same as those described in the sixth embodiment.

The speed changing unit 2312 is the same as the speed changing unit 2312 of the seventh embodiment.

The steam flow rate fluctuation calculation unit 2314 calculates the steam flow rate fluctuation δG * that occurs when the pulling is started at that position based on the position of the pusher 2.
The steam flow rate deviation calculation unit 2315 acquires the deviation δG between the set value of the steam flow rate and the value measured by the steam flow rate sensor 11 and the steam flow rate fluctuation δG *, and obtains the set value of the steam flow rate after drawing in and the actual steam flow rate. Calculate the predicted value of the deviation from.

The pull-in determination unit 2316 determines whether or not to start pulling back even when the pusher 2 is being extended, based on the predicted value of the deviation of the steam flow rate after the pull-in and the current position of the pusher 2. For example, when the intermediate point of extension of the pusher _{is set as the minimum extension distance L min,} and after passing through that position, the predicted value of the steam flow rate when pulled back at that position exceeds the _{predetermined value δ G min.} Immediately pull back. The minimum extension distance L _min is set to ensure that dust is pushed out. Even if the pusher 2 is completely pulled in and then pushed out by, for example, 1 cm, no dust is supplied. When the dust is pushed by the pusher 2, it is first crushed. Extrusion starts when it is no longer crushed. Therefore, pulling in is prohibited until the pusher 2 reaches the minimum extension distance L _min to ensure that dust is supplied.

(motion)
First, the dust supply control unit 2301 calculates a dust request value such that the measured value of the steam flow rate approaches the set value of the steam flow rate. The dust supply control unit 2301 outputs the dust request value to the speed change unit 2312. The dust supply control unit 2301 calculates a dust request value at predetermined time intervals, and outputs this value to the speed change unit 2312. The speed changing unit 2312 determines the extension speed of the pusher 2. While the speed changing unit 2312 does not receive the pull-in command value, the speed changing unit 2312 outputs the extension speed calculated based on the dust request value to the pusher 2 as the speed command value. The pusher 2 that has received the speed command continues to extend while changing its extension speed based on this speed command value.

Further, the steam flow rate fluctuation calculation unit 2314 calculates the steam flow rate fluctuation δG * based on the position of the pusher 2. For example, a table in which the relationship between the position of the pusher 2 and the steam flow rate fluctuation δG * is determined in advance is prepared, and the steam flow rate fluctuation calculation unit 2314 is based on this table and the current position of the pusher 2 and δG *. Is calculated. The steam flow rate fluctuation calculation unit 2314 outputs δG * to the steam flow rate deviation calculation unit 2315.

Next, the steam flow rate deviation calculation unit 2315 predicts the predicted value of the steam flow rate based on a model that outputs the predicted value of the steam flow rate when the drawing is started at that position when, for example, δG and δG * are input. .. Then, the steam flow rate deviation calculation unit 2315 calculates the deviation between the predicted value of the steam flow rate expected after drawing in and the set value of the steam flow rate. The steam flow rate deviation calculation unit 2315 outputs the calculated deviation of the steam flow rate to the pull-in determination unit 2316. Further, the pull-in determination unit 2316 acquires the current position of the pusher 2. Next, the pull-in determination unit 2316 determines whether or not to start pulling in the pusher 2. First, the pull-in determination unit 2316 determines whether or not the deviation (positive value) of the steam flow rate expected after the pull-in exceeds a predetermined threshold value and the position of the pusher 2 _{exceeds the minimum extension distance L min.} judge. If any of the conditions is not satisfied, the pull-in determination unit 2316 determines that the pull-in is not started. When both conditions are satisfied, the pull-in determination unit 2316 determines that the pull-in is started. Further, the pull-in determination unit 2316 determines whether or not the pusher 2 has passed the end point limit switch. When passing through the end point limit switch, the pull-in determination unit 2316 determines that the pull-in is started. When the pull-in determination unit 2316 determines that the pull-in is not started, the pusher 2 continues to extend.

When the pull-in determination unit 2316 determines that the pull-in is started, it outputs an ON signal to the pull-in command unit 2309. Then, the pull-in command unit 2309 outputs a pull-in ON command to the speed change unit 2312. The speed changing unit 2312 pulls back the pusher 2 at the _{maximum pulling speed −v max.} When the pusher 2 is pulled back until it passes through the origin limit switch, the pull-in command unit 2309 outputs a pull-in OFF command to the speed change unit 2312. Then, the speed conversion unit 2310 again outputs the extension speed based on the dust required value to the pusher 2, and the next extension operation is started.

According to the present embodiment, it is possible to prevent the steam flow rate from deviating from the design value due to the pulling in of the pusher 2 without controlling the speed of the pusher 2 or the like.
In addition, this embodiment can be combined with the sixth embodiment and the seventh embodiment.

<Ninth Embodiment>
The object of this embodiment is to avoid an excessive supply of garbage and to stabilize combustion. For example, let's say you want to increase the power generation output. It is a good policy to increase the amount of garbage supplied in order to increase the power generation output. However, if a large amount of dust is supplied at once, the dry region 3A erodes the combustion region 3B and combustion is hindered, which is expected to have an adverse effect from the viewpoint of increasing combustion. The supply of waste must be limited to the extent that the combustion area 3B is not eroded.
In the present embodiment, for example, in the case where the phase factors of the O ₂ concentration and the waste supply flue, to determine the erosion of the combustion zone 3B, it is determined that the combustion zone 3B is eroded temporarily the supply of the waste It stops at and realizes stable combustion.

(composition)
FIG. 15 is a diagram showing an example of the mechanical configuration of the control device according to the ninth embodiment.
FIG. 15 shows the configuration of the dust supply amount control unit 23H in the control device 20H according to the present embodiment. The configuration of the air flow rate control unit is any of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.

As shown in the figure, the dust supply amount control unit 23H includes a dust supply limiting unit 2320, an extension speed limiting unit 2324, and a speed changing unit 2312. The dust supply limiting unit 2320 includes an O ₂ concentration pretreatment filter 2321, a pusher extension speed pretreatment filter 2322, a correlation coefficient setting unit 2211a, and a dust supply temporary stop determination unit 2323.
For example, the dust supply amount control unit 23H includes a dust supply control unit 2301, a pusher extension control unit 2308a, and a second speed change unit 2312a described with reference to FIG. The extension speed command may be output to the extension speed limit unit 2324. Alternatively, the dust supply amount control unit 23H includes the pusher extension control unit 2308 and the second speed change unit 2312a described with reference to FIG. 9, and the second speed change unit 2312a issues an extension speed command to the extension speed limit unit. It may be output to 2324.

The O ₂ concentration pretreatment filter 2321 _{inputs the measured value measured by the O 2} concentration sensor 14, limits the upper and lower limits, limits the rate of change per unit time, performs filter processing for noise removal, and the like, and O ₂ Estimate the true value of the concentration.
The pusher extension speed pretreatment filter 2322 inputs a measured value or a command value of the pusher extension speed, limits the upper and lower limits, limits the rate of change per unit time, filters for noise removal, and supplies dust. Estimate the true value of the quantity.
The correlation coefficient setting unit 2211a _{calculates the correlation coefficient between the estimated value of the O 2} concentration and the estimated value of the dust supply amount.
The extension speed limiting unit 2324 acquires the extension speed command and the dust supply limit signal output by the dust supply pause determination unit 2323, and changes the extension speed of the pusher 2 based on the dust supply limit signal.
The speed changing unit 2312 is the same as the speed changing unit 2312 of the seventh embodiment.

The garbage supply suspension determination unit 2323 determines the suspension of garbage supply based on the correlation coefficient. The dust supply pause determination unit 2323 is set with a set value X _{H for suspending the dust supply and a set value X R} for restarting the dust supply, and the set value X for suspending the correlation coefficient. _{If H} is exceeded, the dust supply pause signal is turned ON, and if the correlation coefficient is _{less than the set value X R} for restarting, the dust supply pause signal is turned OFF to limit the dust supply.

The determination result of the dust supply temporary stop determination unit 2323 is transmitted to the extension speed limiting unit 2324 as a dust supply limiting signal. The extension speed limiting unit 2324 is located upstream of the speed changing unit 2312, and when the dust supply limiting signal is OFF, the extension speed limiting unit 2324 uses, for example, the extension speed signal output by the second speed changing unit 2312a as it is. It is transmitted to the speed changing unit 2312, while when the dust supply limiting signal is ON, the extension speed limiting unit 2324 transmits zero to the speed changing unit 2312 instead of the extension speed signal.

(motion)
It is assumed that the garbage incinerator is burning stably and excess garbage has begun to be supplied to it. Then, the dry area 3A expands and erodes the combustion area 3B. When the combustion region 3B is eroded, a part of the air that has been used for combustion is discharged to the flue 12 without being used for combustion. As a result, the O ₂ concentration of the exhaust gas increases. The increase in the O ₂ concentration of the exhaust gas is measured by the _{O 2 concentration sensor 14.} Since the measurement values of the O ₂ concentration sensor 14 includes noise or measurement error, the O ₂ concentration preprocessing filter 2321 estimates the true value of the O ₂ concentration. Since the O ₂ concentration varies depending on the composition of the collected garbage, the water content, the transportation of the garbage, etc. in addition to the excessive supply of the garbage, it is not possible to simply judge the excessive supply of the garbage only from _{the O 2 concentration.} Not realistic. Therefore, the interphase coefficient of the fluctuation of the garbage supply amount is calculated in the fluctuation of the _{O 2 concentration, and if the correlation coefficient is close to 1, the O 2} concentration also increases when the garbage supply amount increases. Judge that the supply of garbage is excessive. _{In order for the O 2} concentration to change after the dust is supplied, there is a delay in the flow of exhaust gas, a delay in _{the measurement of the O 2} concentration sensor 14, a delay until the supplied dust spreads to the dry area 3A and the combustion area 3B, etc. There are various time delays. In addition to removing noise, the pusher extension speed pretreatment filter 2322 expresses these delays with a filter such as a first-order delay, and cancels the time lag between the measured value of the _{O 2 concentration and the dust supply.} In the garbage supply suspension determination unit 2323, for example, _{0.7 is set as the set value X H for suspending the garbage supply and 0.3 is set as the set value X R} for restarting the garbage supply, and the excess supply of the garbage is determined. ..
When it is determined that the dust is excessively supplied, the extension speed limiting unit 2324 commands the speed changing unit 2312 to set the extension speed to zero and stops the dust supply. Due to the stop of the dust supply, the dry area 3A is reduced, and the combustion area 3B is restored, so that the O ₂ concentration returns to the original value. Then, since the correlation coefficient becomes 0 or a negative value, the garbage supply is restarted. In the above description, when the dust supply limiting signal is ON, the extension speed is set to zero. However, it does not necessarily have to be zero. For example, it may be set to about 1/10 of the normal speed.

<10th Embodiment>
The tenth embodiment is an alternative to the sixth embodiment. As described in the sixth embodiment, in a general waste incinerator, for example, when the steam flow rate becomes equal to or less than the set value, the control device outputs an operation command value ON to the pusher. The pusher extends at a predetermined extension rate to supply the waste to the furnace. When the pusher is fully extended, the controller pulls the pusher back. The pusher repeats this operation until the operation command value OFF is commanded. In this way, the dust is intermittently supplied in a constant pattern. In the sixth embodiment, the extension length of the pusher 2 that is faithful to the dust requirement value required to compensate for the fluctuation of the steam flow rate is determined, and the pusher 2 is extended in small steps in return to the extension length. This suppressed the variation in the amount of garbage supplied. In the tenth embodiment, the same effect is obtained by adjusting the extension speed of the pusher 2 instead of extending the pusher 2 in small steps.

(composition)
FIG. 16 is a diagram showing an example of the functional configuration of the control device according to the tenth embodiment.
FIG. 16 shows the configuration of the dust supply amount control unit 23J among the control devices 20J according to the present embodiment. The configuration of the air flow rate control unit is any one of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.

As shown in the figure, the dust supply amount control unit 23J includes a dust supply control unit 2301, a pusher extension control unit 2308, a pull-in command unit 2309, an extension speed adjustment unit 2340, a speed change unit 2312, and a second speed. A changing unit 2312a and an adding unit 2312b are provided. The feature of this embodiment is in the extension speed adjusting unit 2340, and other than that, it is the same as that described with reference to FIG.

The extension speed adjustment unit 2340 adjusts the extension speed command of the pusher 2 according to the ratio of the time during which the operation command was ON in the past 10 minutes, for example. The extension speed adjustment unit 2340 includes a PI controller 2344 that calculates an extension speed adjustment command based on the difference between the ON ratio output by the ON ratio detection unit 2341 and the ON ratio set value. The ON ratio detection unit 2341 is a binarization unit 2342 and a binarization unit 2342 that output 1 when the extension command is ON and 0 when the extension command is OFF, based on the extension command output by the pusher extension control unit 2308. It is provided with a moving average unit 2343 that inputs a value of 0 or 1 output by 2342 and calculates a moving average of the input values, for example, for 10 minutes. The output of the moving average unit 2343 indicates the ratio of the time when the extension command is turned on, that is, the ratio of the operating time per unit time. The addition unit 2312b adds the extension speed adjustment command to a predetermined extension speed set value and inputs it to the second speed change unit 2312a. When the operation command output by the pusher extension control unit 2308 is ON, the second speed change unit 2312a outputs a value obtained by adding the extension speed adjustment command to the predetermined extension speed set value as the extension speed command, while outputting the extension speed command. When the operation command is OFF, 0 is output as the extension speed command.

(motion)
The operation of the extension speed adjusting unit 2340 will be described. Suppose that in the past, for example, 10 minutes, the ratio of the time when the operation command of the pusher 2 was ON was exactly 1. This is a result of the pusher constantly operating in the past 10 minutes, and the dust is uniformly supplied in time. However, since the calorific value per unit mass or unit volume of dust constantly fluctuates, if the operation command is always ON, it is not possible to cope with a situation where the calorific value decreases due to, for example, the supply of moist dust. In such a case, by increasing the extension speed command of the pusher 2, it is possible to increase the dust supply of the pusher per unit time and to make a time when the operation command of the pusher 2 is turned off. Or, suppose that in the past, for example, 10 minutes, the ratio of the time when the pusher operation command was ON was 0.1. This means that the dust supply capacity of the pusher 2 is excessive with respect to the dust demand value, and once the pusher 2 operates, dust is not supplied for a while thereafter. That is, the supply of dust is uneven in time. In such a state, since the amount of garbage burned by the furnace over several minutes is supplied by one operation of the pusher 2, each time the pusher operates, the furnace becomes disturbed. From the viewpoint of combustion stability, it is effective to balance the combustion and supply of waste. Therefore, as an appropriate ON ratio, for example, 0.8 is set as the ON ratio set value, and the difference between the ON ratio set value and the ON ratio output by the ON ratio detection unit 2341 is set to, for example, the PI controller 2344. Input to to calculate the extension speed command adjustment command. The ON ratio is set to the ON ratio set value by the action of the PI controller 2344.

The operation of the dust supply amount control unit 23J will be described. Based on the dust request value from the dust supply control unit 2301, the pusher extension control unit 2308 outputs the pusher extension command to the extension speed adjustment unit 2340 and the second speed change unit 2312a. The extension speed adjustment unit 2340 calculates the extension speed command adjustment command by the above processing. The addition unit 2312b adds the extension speed command adjustment command from the predetermined extension speed setting, and outputs the extension speed setting after the addition to the second speed change unit 2312a. The second speed changing unit 2312a outputs the extension speed setting acquired from the addition unit 2312b when the extension command acquired from the pusher extension control unit 2308 is ON, and outputs 0 as the extension speed command when the extension command is OFF. For example, if the ON ratio is insufficient with respect to the ON ratio set value, the extension speed of the pusher 2 is reduced, and if the ON ratio exceeds the ON ratio set value, the extension speed of the pusher 2 is increased. As a result, the amount of dust supplied can be made uniform and combustion can be stabilized.

<Eleventh Embodiment>
In the eleventh embodiment, for example, the extension speed of the pusher 2 is adjusted according to the ratio of the time when the operation command is ON in the past 10 minutes. In the eleventh embodiment, the variation in the supply amount of dust is suppressed without changing the extension speed of the pusher.

(composition)
FIG. 17 is a diagram showing an example of the functional configuration of the control device according to the eleventh embodiment.
FIG. 17 shows the configuration of the dust supply amount control unit 23L in the control device 20L according to the present embodiment. The configuration of the air flow rate control unit is any one of the above air flow rate control units 22 to 22D. The data acquisition unit 21 and the dust transfer control unit 24 are the same as those described with reference to FIG.

As shown in the figure, the dust supply amount control unit 23L includes a dust supply control unit 2301, a pusher extension control unit 2308, a pull-in command unit 2309, an extension speed adjustment unit 2340, a speed change unit 2312, and a second speed. It includes a changing unit 2312a, an on-delay timer 2345, and a subtracting unit 2312c. The configurations other than the on-delay timer 2345 and the subtraction unit 2312c are the same as those described with reference to FIG.

The subtraction unit 2312c converts the extension speed adjustment command of the pusher 2 output by the PI controller 2344 into the on-delay timer set value of the pusher extension command by subtracting the extension speed adjustment command from the predetermined on-delay timer set value.
The on-delay timer 2345 transmits the extension command of the pusher 2 output by the pusher extension control unit 2308 to the second speed change unit 2312a until the time specified by the converted on-delay timer set value elapses. Is shut off, and the extension command is transmitted to the second speed changing unit 2312a after the time specified by the on-delay timer set value has elapsed.

(motion)
The operation of the dust supply amount control unit 23L will be described. The pusher extension control unit 2308 outputs a pusher extension command to the extension speed adjustment unit 2340 and the on-delay timer 2345. The extension speed adjustment unit 2340 calculates the extension speed command adjustment command as described with reference to FIG. The subtraction unit 2312c subtracts the extension speed command adjustment command from the predetermined on-delay timer set value, and converts the extension speed adjustment command into the on-delay timer set value of the extension command. By this conversion, the on-delay timer set value becomes larger as the ON ratio exceeds the ON ratio set value, for example. The subtraction unit 2312c outputs the on-delay timer set value to the on-delay timer 2345. The on-delay timer 2345 waits for the extension command acquired from the pusher extension control unit 2308 to elapse until the time specified by the on-delay timer set value elapses, and then outputs the extension command to the second speed change unit 2312a. The second speed changing unit 2312a outputs a predetermined extension speed setting when the extension command is ON, and 0 when the extension command is OFF as an extension speed command. By setting the on-delay timer, the extension speed of the pusher 2 as a time average value can be adjusted (decreased), and the ON ratio of the pusher 2 can be brought close to an appropriate ON ratio. As a result, the amount of dust supplied can be made uniform and combustion can be stabilized without changing the speed of the pusher 2. Further, from the viewpoint of the average speed of one round trip until the pusher 2 is extended and pulled in, the same effect can be obtained even if the present embodiment is applied to the control of the pull-in speed.

In the sixth to eleventh embodiments, the control devices 20K, 20F, 20G, 20H, 20J, and 20L are the air flow rate control units 22 to 22D according to the first to fourth embodiments, respectively. Although it has been described as having either of them, the present invention is not limited to this. The control devices 20K, 20F, 20G, 20H, 20J, and 20L generally do not have a function of controlling the air flow rate based on the sensitivity of the steam flow rate to the change of the air flow rate instead of the air flow rate control units 22 to 22D. Air flow rate control unit may be provided. A general air flow rate control unit includes, for example, the basic control unit 2201 described with reference to FIG. 3, and blowers 4 and valves 8A to 8E so that the air flow rate becomes a set value output by the basic control unit 2201. It has a function to control.

FIG. 18 is a diagram showing an example of the hardware configuration of the control device according to each embodiment.
The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905.
The control devices 20 to 20G described above are mounted on the computer 900. Each of the above-mentioned functions is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads the program from the auxiliary storage device 903, expands it to the main storage device 902, and executes the above processing according to the program. Further, the CPU 901 secures a storage area in the main storage device 902 according to the program. Further, the CPU 901 secures a storage area for storing the data being processed in the auxiliary storage device 903 according to the program.

A program for realizing all or part of the functions of the control devices 20 to 20G is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by the computer system and executed. Depending on the above, processing by each functional unit may be performed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. In addition, the "computer system" includes the homepage providing environment (or display environment) if the WWW system is used. Further, the "computer-readable recording medium" refers to a portable medium such as a CD, DVD, or USB, or a storage device such as a hard disk built in a computer system. When this program is distributed to the computer 900 via a communication line, the distributed computer 900 may expand the program to the main storage device 902 and execute the above processing. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may further realize the above-mentioned functions in combination with a program already recorded in the computer system. ..

As described above, some embodiments according to the present disclosure have been described, but all of these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

<Additional notes>
The control devices 20 to 20G, control methods and programs described in each embodiment are grasped as follows, for example.

(1) The control devices 20 to 20G according to the first aspect are sent to the furnace (combustion chamber 6) of the garbage incineration facility so that the steam flow rate of the steam generated by the garbage incineration facility 100 becomes a predetermined first set value. A dust supply amount control unit 23 that controls the supply amount of dust to be supplied, and control of the air flow rate so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value. An air flow rate control unit 22 to 22D for calculating a value is provided.

As a result, the stock of the fueled garbage can be managed to a predetermined value, and the combustion state of the garbage can be stabilized. For example, the waste incinerator 100 can be continuously operated in a state close to the upper limit of the equipment capacity, and the capacity factor is improved. Further, by stabilizing combustion, it is possible to suppress emissions of NOX, CO and the like.

(2) The control device 20 according to the second aspect is the control device 20 of (1), and the air flow rate control unit 22 so that the waveform indicated by the change over time of the air flow rate becomes a sine wave. The supply amount of the air flow rate is changed, and the change in the steam flow rate to the change is analyzed to detect the sensitivity.
By periodically changing the air flow rate and analyzing the response, the sensitivity of the steam flow rate to the change in the air flow rate can be detected.

(3) The control device 20B according to the third aspect is the control device 20B of (1), and the air flow rate control unit 22B is based on the response model of the steam flow rate to the air flow rate, which is proportional to the sensitivity. The control value is calculated so that the correlation coefficient between the estimated value of the change in the steam flow rate and the measured value of the change in the steam flow rate becomes a predetermined third set value.
The sensitivity of the steam flow rate to the change in the air flow rate can be detected without changing the air flow rate periodically.

(4) The control device 20C according to the fourth aspect is the control device 20C of (1), and the air flow rate control unit 22C uses the steam flow rate response model for the air flow rate to incinerate the dust during operation. The control so that the sensitivity becomes the second set value based on the response model after identification using the air flow rate and the steam flow rate collected from the equipment and the measured value of the steam flow rate. Calculate the value.
By sequentially identifying the system and detecting the sensitivity of the steam flow rate to the change of the air flow rate, it is possible to detect the sensitivity of the steam flow rate to the change of the air flow rate in the latest operating state.

(5) The control device 20D according to the fifth aspect is the control devices 20, 20B, 20C of (1) to (4), and the air flow rate control unit 22D puts the dust into the furnace (combustion chamber 6). Calculated based on the first model showing the relationship between the pushing speed of the supply mechanism that pushes and supplies to the steam flow rate and the change amount of the steam flow rate, and the second model showing the relationship between the air flow rate and the change amount of the steam flow rate. The correction amount is calculated by inputting the extrusion speed of the supply mechanism in the dust incineration facility into the third model showing the relationship between the extrusion speed and the air flow rate, and the control value corrected by the correction amount is calculated. ..
As a result, fluctuations in the steam flow rate that occur when the supply mechanism (pusher 2) is pulled in can be alleviated.

(6) The control device 20K according to the sixth aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the dust supply amount control unit 23E has the steam flow rate of the second. 1 A dust requirement value that becomes a set value is calculated, and the supply mechanism that pushes and supplies the dust to the furnace (combustion chamber 6) is instructed to push out the dust by a length corresponding to the dust demand value.
As a result, the discrepancy between the required dust value and the actual dust input amount is reduced, and fluctuations in the steam flow rate can be suppressed.

(7) The control device 20F according to the seventh aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the dust supply amount control unit 23F has the steam flow rate of the first. 1 A dust requirement value that becomes a set value is calculated, and the dust is supplied to the furnace (combustion chamber 6) by extending to a predetermined first position, and when the dust reaches the first position, the spreading direction is reached. Regarding the dust supply mechanism that is pulled back in the opposite direction of the above, a second position is provided in the direction opposite to the first position where the dust supply mechanism starts speeding up, and the supply mechanism is the second position. When the position is reached, the extension speed of the supply mechanism is controlled to be increased.
As a result, it is possible to mitigate the influence of insufficient input of dust while pulling back the supply mechanism (pusher 2).

(8) The control device 20G according to the eighth aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the dust supply amount control unit 23G has the steam flow rate of the second. The dust supply mechanism that supplies the dust to the furnace by calculating a dust demand value that becomes one set value and extends it to a predetermined first position, and pulls it back when the dust reaches the first position. When the predicted value of the steam flow rate when the supply mechanism is pulled back from the extending position of the supply mechanism exceeds the first set value, the supply mechanism is pulled back from the extending position.
As a result, the supply mechanism (pusher 2) can be pulled back without being adversely affected by the insufficient input of dust. Further, it is possible to reduce the excessive steam flow rate by utilizing the fact that the amount of dust input is insufficient while the supply mechanism (pusher 2) is pulled back.

(9) The control device 20H according to the ninth aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the garbage supply amount control unit 23H includes the garbage incinerator 100. It is determined whether or not the dust is oversupplied based on the correlation coefficient between the flow rate of oxygen to be generated and the supply amount of the dust, and if it is determined that the dust is oversupplied, the supply of the dust is stopped.
As a result, it is possible to prevent the dust being dried in the drying region 3A from being supplied to the combustion region 3B and hinder combustion due to the excessive supply of dust, and to stabilize the combustion.

(10) The control device 20J according to the tenth aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the dust supply amount control unit 23J transfers the dust to the furnace. The supply mechanism (pusher 2) that pushes out and supplies calculates the operating time ratio per unit time, and when the time ratio is insufficient with respect to the set value, the extension speed of the supply mechanism (pusher 2) is reduced and the time When the ratio exceeds the set value, the extension speed of the supply mechanism (pusher 2) is increased.
As a result, the time during which the pusher 2 is paused is limited, and as a result, the dust can be uniformly supplied to the furnace and the combustion can be stabilized.

(11) The control device 20L according to the eleventh aspect is the control devices 20, 20B, 20C, 20D of (1) to (5), and the dust supply amount control unit 23L transfers the dust to the furnace. The supply mechanism (pusher 2) that pushes out and supplies calculates the operating time ratio per unit time, and when the time ratio exceeds the set value, the operation of the supply mechanism (pusher 2) starts according to the excess amount. To delay.
As a result, the operating time of the pusher 2 per unit time can be averaged, dust can be uniformly supplied to the furnace, and combustion can be stabilized.

(12) The control device 20A according to the twelfth aspect includes a garbage supply amount control unit 23A for calculating the supply amount of garbage to be supplied to the furnace (combustion chamber 6) of the garbage incinerator. The dust supply amount control unit 23A calculates the first supply amount of the dust in which the steam flow rate of the steam generated by the dust incinerator 100 becomes a predetermined first set value, and determines the air flow rate of the air supplied to the furnace. The second supply amount of the dust at which the sensitivity of the steam flow rate to the change becomes a predetermined second set value is calculated, and the second supply amount is added to the first supply amount to calculate the supply amount.

As a result, the stock of the fueled garbage can be managed to a predetermined value, and the combustion state of the garbage can be stabilized. For example, the waste incinerator 100 can be continuously operated in a state close to the upper limit of the equipment capacity, and the capacity factor is improved. Further, by stabilizing combustion, it is possible to suppress emissions of NOX, CO and the like.

(13) The control device 20K according to the thirteenth aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The dust supply amount control unit 23K is provided, and the dust supply amount control unit 23K calculates a dust demand value such that the steam flow rate becomes the first set value, and pushes and supplies the dust to the incinerator. The supply mechanism is instructed to extrude by a length corresponding to the required dust value.

(14) The control device 20F according to the fourteenth aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The dust supply amount control unit 23F is provided, and the dust supply amount control unit 23F calculates a dust demand value such that the steam flow rate becomes the first set value, and extends the dust supply to a predetermined first position. When the dust is supplied to the furnace and reaches the first position, the dust supply mechanism is pulled back in the direction opposite to the extension direction. Is provided with a second position at which the speed is increased, and when the supply mechanism reaches the second position, the extension speed of the supply mechanism is controlled to be increased.

(15) The control device 20G according to the fifteenth aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The dust supply amount control unit 23G is provided, and the dust supply amount control unit 23G calculates a dust demand value such that the steam flow rate becomes the first set value, and extends the dust supply to a predetermined first position. With respect to the dust supply mechanism that is pulled back when the dust is supplied to the furnace and reaches the first position, the prediction of the steam flow rate when the supply mechanism is pulled back from the extending position of the supply mechanism. When the value exceeds the first set value, the supply mechanism is pulled back from the extending position.

(16) The control device 20H according to the 16th aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The garbage supply amount control unit 23H is provided, and the garbage supply amount control unit 23H is oversupplied with the garbage based on a correlation coefficient between the flow rate of oxygen generated by the garbage incinerator and the supply amount of the garbage. If it is determined whether or not the waste is excessively supplied, the supply of the dust is stopped.

(17) The control device 20J according to the seventeenth aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The dust supply amount control unit 23J is provided, and the dust supply amount control unit 23J calculates the time ratio during which the supply mechanism (pusher 2) that pushes and supplies the dust to the incinerator operates per unit time. When the time ratio is insufficient with respect to the set value, the extension speed of the supply mechanism is reduced, and when the time ratio exceeds the set value, the extension speed of the supply mechanism is increased.

(18) The control device 20L according to the eighteenth aspect controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value. The dust supply amount control unit 23L is provided, and the dust supply amount control unit 23L calculates the time ratio during which the supply mechanism (pusher 2) that pushes and supplies the dust to the incinerator operates per unit time. When the time ratio exceeds the set value, the start of operation of the supply mechanism (pusher 2) is delayed according to the excess amount.

(19) In the control method according to the nineteenth aspect, the dust supplied to the furnace (combustion chamber 6) of the dust incinerator so that the steam flow rate of the steam generated by the dust incinerator 100 becomes a predetermined first set value. The control value of the air flow rate is calculated so that the sensitivity of the steam flow rate to the change of the air flow rate of the air supplied to the furnace becomes a predetermined second set value.

(20) The program according to the twentieth aspect supplies the computer to the furnace (combustion chamber 6) of the dust incinerator so that the steam flow rate of the steam generated by the dust incinerator becomes a predetermined first set value. The process of controlling the supply amount of dust and calculating the control value of the air flow rate so that the sensitivity of the steam flow rate to the change of the air flow rate of the air supplied to the furnace becomes a predetermined second set value is executed.

100 ... Garbage incineration equipment, 1 ... Hopper, 2 ... Pusher, 3 ... Stoker, 3A ... Dry area, 3B ... Combustion area, 3C ... Post-combustion area, 4. Blower, 5A-5E ... air box, 6 ... combustion chamber, 7 ... ash outlet, 8A-8E ... valve, 9 ... boiler, 10 ... pipeline, 11. ... Steam flow sensor, 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20J, 20K, 20L ... Control device, 21 ... Data acquisition unit, 22, 22A, 22B, 22C , 22D ... Air flow rate control unit 2201 ... Basic control unit 2202 ... Air flow rate cycle change generation unit 2203 ... Gradient setting unit 2204 ... PI control unit 2205 ... Response Oscillation detection unit, 2206 ... Gradient calculation unit, 2207 ... Addition unit, 2208 ... Subtraction unit, 2209 ... Subtraction unit, 2210 ... Air flow rate change unit, 2211 and 211a ... Phase relationship Number setting unit, 2212 ... PI control unit, 2213 ... Response model, 2214 ... Correlation coefficient calculation unit, 2215 ... Addition unit, 2216 ... Subtraction unit, 2217 ... Subtraction unit, 2218 ... Model identification unit, 2219 ... Gradient calculation unit, 2220 ... Subtraction unit, 2221 ... Addition unit, 2222 ... Subtraction unit, 2224 ... Correction amount calculation unit, 2225 ... Subtraction unit, 23, 23A, 23E, 23F, 23G, 23H, 23J, 23K, 23L ... Dust supply amount control unit, 2301 ... Dust supply control unit, 2302 ... Gradient setting unit, 2303 ... PI control unit, 2304 ... response amplitude detection unit, 2305 ... gradient calculation unit, 2306 ... addition unit, 2307 ... subtraction unit, 2308, 2308a ... pusher extension control unit, 2309 ... Pull-in command unit, 2310 ... Speed conversion unit, 2311 ... Speed conversion position calculation unit, 2312 ... Speed change unit, 2312a ... Second speed change unit, 2312b ... Addition unit, 2312c.・ ・ Subtraction unit, 2314 ・ ・ ・ Steam flow rate fluctuation calculation unit, 2315 ・ ・ ・ Steam flow rate deviation calculation unit, 2316 ・ ・ ・ Pull-in judgment unit, 2320 ・ ・ ・ Dust supply restriction unit, 2321 ・ ・ ・ O ₂ Before concentration Processing filter, 2322 ... Pusher extension speed pretreatment filter, 2323 ... Dust supply pause determination unit, 2340 ... Extension speed adjustment unit, 2341 ... ON ratio detection unit, 2342 ... Binarization Unit, 2343 ... Moving average part, 2344 ... PI control Instrument, 2345 ... on-delay timer, 24 ... dust transfer control unit, 900 ... computer, 901 ... CPU, 902 ... main storage device, 903 ... auxiliary storage device, 904 ...・ Input / output interface, 905 ・ ・ ・ Communication interface

Claims (20)

A garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
An air flow rate control unit that calculates a control value of the air flow rate so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value.
A control device comprising. The air flow rate control unit changes the supply amount of the air flow rate so that the waveform indicated by the change over time of the air flow rate becomes a sine wave, analyzes the change in the steam flow rate to the change, and analyzes the sensitivity. To detect,
The control device according to claim 1. The air flow rate control unit determines a correlation coefficient between the estimated value of the change in the steam flow rate and the measured value of the change in the steam flow rate based on the response model of the steam flow rate to the air flow rate, which is proportional to the sensitivity. Calculate the control value so as to be the third set value of
The control device according to claim 1. The air flow rate control unit identifies the response model of the steam flow rate to the air flow rate by using the air flow rate and the steam flow rate collected from the dust incineration facility in operation, and the response model after identification and the response model. Based on the measured value of the steam flow rate, the control value is calculated so that the sensitivity becomes the second set value.
The control device according to claim 1. The air flow rate control unit has a first model showing the relationship between the pushing speed of the supply mechanism that pushes and supplies the dust to the furnace and the change amount of the steam flow rate, and the relationship between the air flow rate and the change amount of the steam flow rate. The correction amount is calculated by inputting the extrusion speed of the supply mechanism in the dust incineration facility into the second model showing the above and the third model showing the relationship between the extrusion speed and the air flow rate calculated based on. The control value corrected by the correction amount is calculated.
The control device according to any one of claims 1 to 4. The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and the length corresponding to the dust demand value of the supply mechanism for pushing out the dust to the furnace and supplying the dust. Instruct to push it out
The control device according to any one of claims 1 to 5. The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and supplies the dust to the furnace by extending the dust to a predetermined first position, and the dust supply amount control unit supplies the dust to the furnace. Regarding the dust supply mechanism that is pulled back in the direction opposite to the extension direction when the position 1 is reached, a second position is provided in which the dust supply mechanism starts speeding up in the opposite direction from the first position. When the supply mechanism reaches the second position, it is controlled to increase the extension speed of the supply mechanism.
The control device according to any one of claims 1 to 5. The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and supplies the dust to the furnace by extending the dust to a predetermined first position, and the dust supply amount control unit supplies the dust to the furnace. Regarding the dust supply mechanism that is pulled back when the position of 1 is reached, the predicted value of the steam flow rate when the supply mechanism is pulled back from the extended position of the supply mechanism exceeds the first set value. If the supply mechanism is pulled back from the extending position,
The control device according to any one of claims 1 to 5. The garbage supply amount control unit determines whether or not the garbage is oversupplied based on the correlation coefficient between the flow rate of oxygen generated by the garbage incinerator and the amount of the garbage supplied, and the garbage is oversupplied. If it is determined that there is, the supply of the garbage is stopped.
The control device according to any one of claims 1 to 5. The dust supply amount control unit calculates the time ratio in which the supply mechanism that pushes out the dust to the furnace and supplies the dust to the furnace, and when the time ratio is insufficient with respect to the set value, the supply mechanism is extended. Decrease the speed and increase the extension speed of the supply mechanism when the time ratio exceeds the set value.
The control device according to any one of claims 1 to 5. The dust supply amount control unit calculates a time ratio in which the supply mechanism that pushes and supplies the dust to the furnace operates per unit time, and when the time ratio exceeds a set value, the amount exceeds the set value. Delaying the start of operation of the supply mechanism,
The control device according to any one of claims 1 to 5. It is a garbage supply amount control unit that calculates the amount of garbage supplied to the furnace of the garbage incinerator.
The first supply amount of the garbage in which the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value is calculated.
The second supply amount of the dust whose sensitivity of the steam flow rate to the change of the air flow rate of the air supplied to the furnace becomes a predetermined second set value is calculated.
A control device including a garbage supply amount control unit for calculating the supply amount by adding the second supply amount to the first supply amount. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and the length corresponding to the dust demand value of the supply mechanism for pushing out the dust to the furnace and supplying the dust. A control device that instructs you to push it out. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and supplies the dust to the furnace by extending the dust to a predetermined first position, and the dust supply amount control unit supplies the dust to the furnace. Regarding the dust supply mechanism that is pulled back in the direction opposite to the extension direction when the position 1 is reached, a second position is provided in which the dust supply mechanism starts speeding up in the opposite direction from the first position. A control device that controls to increase the extension speed of the supply mechanism when the supply mechanism reaches the second position. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The dust supply amount control unit calculates a dust demand value such that the steam flow rate becomes the first set value, and supplies the dust to the furnace by extending the dust to a predetermined first position, and the dust supply amount control unit supplies the dust to the furnace. Regarding the dust supply mechanism that is pulled back when the position of 1 is reached, the predicted value of the steam flow rate when the supply mechanism is pulled back from the extended position of the supply mechanism exceeds the first set value. In the case, a control device that pulls back the supply mechanism from the extending position. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The garbage supply amount control unit determines whether or not the garbage is oversupplied based on the correlation coefficient between the flow rate of oxygen generated by the garbage incinerator and the amount of the garbage supplied, and the garbage is oversupplied. A control device that stops the supply of the dust when it is determined that the dust is present. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The dust supply amount control unit calculates the time ratio in which the supply mechanism that pushes out the dust to the furnace and supplies the dust to the furnace, and when the time ratio is insufficient with respect to the set value, the supply mechanism is extended. A control device that reduces the speed and increases the extension speed of the supply mechanism when the time ratio exceeds a set value. It is provided with a garbage supply amount control unit that controls the amount of garbage supplied to the furnace of the garbage incinerator so that the steam flow rate of steam generated by the garbage incinerator becomes a predetermined first set value.
The dust supply amount control unit calculates a time ratio in which the supply mechanism that pushes and supplies the dust to the furnace operates per unit time, and when the time ratio exceeds a set value, the amount exceeds the set value. A control device that delays the start of operation of the supply mechanism. The amount of garbage supplied to the furnace of the garbage incinerator is controlled so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value.
A control value of the air flow rate is calculated so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value.
Control method. On the computer
The amount of garbage supplied to the furnace of the garbage incinerator is controlled so that the steam flow rate of the steam generated by the garbage incinerator becomes a predetermined first set value.
A control value of the air flow rate is calculated so that the sensitivity of the steam flow rate to a change in the air flow rate of the air supplied to the furnace becomes a predetermined second set value.
A program that executes processing.

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