CN115143479A

CN115143479A - Control device for combustion furnace equipment

Info

Publication number: CN115143479A
Application number: CN202210288644.XA
Authority: CN
Inventors: 大丸卓一郎; 濑户口稔彦; 太田裕二; 岩下信治; 西宫立享; 今田润司; 张志�
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2021-03-31
Filing date: 2022-03-23
Publication date: 2022-10-04
Also published as: JP6998481B1; JP2022155618A

Abstract

The invention provides a control device for a combustion furnace facility, which can accurately grasp the supply state of garbage realized by a feeder and stabilize the combustion state of the garbage. A control device for a combustion furnace facility, comprising a furnace main body for conveying an object to be incinerated while combusting the object to be incinerated, and a feeder for supplying the object to be incinerated to the furnace main body, wherein the control device for the combustion furnace facility comprises: an image acquisition section that acquires, over time, a feeder image that is an image of a region including the feeder; a brightness change determination section that determines a brightness change of the feeder image; a feeder operation acquiring unit that acquires operation information of the feeder; and a supply state determination unit that determines whether the supply amount of the material to be incinerated is sufficient based on the determination of the change in brightness of the feeder image and the information on the operation of the feeder.

Description

Control device for combustion furnace equipment

Technical Field

The present disclosure relates to a control device for a combustion furnace apparatus.

Background

Patent document 1 discloses the following technique: in a waste incineration facility, a stroke length of a push (pusher) type waste feeder is controlled to adjust a waste supply amount based on specific gravity information obtained from a weight and a volume of waste to be charged.

Municipal refuse, which is a main material to be incinerated in refuse incinerating facilities, has a large variation in properties and a large water content. Therefore, when a large amount of municipal refuse is supplied into the combustion furnace, the temperature of the combustion gas and the steam flow rate temporarily decrease.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6779779

Disclosure of Invention

Problems to be solved by the invention

In the pusher-type refuse feeding device (feeder) described in patent document 1, refuse (material to be incinerated) may be supplied once in an excessive amount during the supply of the refuse to the inside of the furnace, or refuse may not be appropriately supplied only by compressing the refuse. In these cases, since both the temperature of the combustion gas and the steam flow rate are reduced, the supply state of the refuse by the feeder cannot be accurately grasped, and the combustion state of the refuse may be unstable.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a control device for a combustion furnace facility, which can accurately grasp a feeding state of garbage by a feeder and stabilize a combustion state of the garbage.

Technical scheme

In order to solve the above-described problems, a control device for a combustion furnace facility according to the present disclosure is a control device for a combustion furnace facility including a furnace main body that transports an object to be incinerated while combusting the object to be incinerated, and a feeder that supplies the object to be incinerated to the furnace main body, the control device for a combustion furnace facility including: an image acquisition section that acquires, over time, a feeder image that is an image of a region including the feeder; a brightness change determining part which determines the brightness change of the feeder image; a feeder operation acquiring unit that acquires operation information of the feeder; and a supply state determination unit that determines whether the supply amount of the material to be incinerated is sufficient based on the determination of the change in brightness of the feeder image and the information on the operation of the feeder.

Advantageous effects

According to the present disclosure, it is possible to provide a control device for a combustion furnace facility capable of accurately grasping a feeding state of garbage by a feeder and stabilizing a combustion state of the garbage.

Drawings

Fig. 1 is a diagram showing a structure of a grate furnace according to an embodiment of the present disclosure.

Fig. 2 is a functional block diagram showing a configuration of a control device according to an embodiment of the present disclosure.

Fig. 3 is a diagram schematically showing the operation of the feeder according to the embodiment of the present disclosure.

FIG. 4 is a diagram schematically representing a feeder image generated by a camera of an embodiment of the present disclosure.

Fig. 5 is a flowchart showing the operation of the exhaust gas concentration acquisition unit of the control device according to the embodiment of the present disclosure.

Fig. 6 is a diagram showing the opening degree of the secondary air damper determined by the secondary air amount control unit of the control device according to the embodiment of the present disclosure.

Fig. 7 is a flowchart showing an operation of the control device according to the embodiment of the present disclosure.

Fig. 8 is a hardware configuration diagram showing a configuration of a computer according to an embodiment of the present disclosure.

Description of the reference numerals

1: a grate furnace;

2: an air box;

3: a hopper;

6: a grate;

7: a furnace;

8: a waste heat recovery boiler;

9: a cooling tower;

10: a furnace main body;

11: a dust collecting device;

12: an outlet flow path;

13: a chimney;

14: a discharge chute;

21: a drying section;

22: a combustion section;

23: a post-combustion section;

31: a feeder;

100: a furnace facility;

220: a camera;

300: a control device;

310: a feeder operation acquisition unit;

315: an image acquisition unit;

315a: a feeder image;

320: a luminance change determination section;

320a: determining a region;

325: a feeder operation limiting section;

330: a feeder speed control section;

335: a supply state determination unit;

340: an excess supply determination unit;

345: an exhaust gas concentration acquisition unit;

345a: a CO sensor;

345b：NO _X a sensor;

346: an exhaust gas concentration detection sensor;

350: a secondary air amount control section;

355: a combustion state acquisition unit;

355a: an exhaust gas thermometer;

360: a combustion state determination unit;

365: a combustion control unit;

400: an object to be incinerated;

1100: a computer;

1110: a processor;

1120: a main memory;

1130: a storage device;

1140: an interface;

a: a forward and backward distance;

b: a blower;

b1: a first blower;

b2: a second blower;

da: a direction of conveyance;

f: a light flame;

h: an air preheater;

l1: a primary air line;

l1a: a primary air damper;

l2: a secondary air line;

l2a: a secondary air damper;

v: a processing space;

z: a burnout length.

Detailed Description

(Combustion furnace apparatus)

Hereinafter, the structure of a combustion furnace facility according to an embodiment of the present disclosure will be described with reference to the drawings.

The combustion furnace facility of the present embodiment is a waste incineration grate furnace for performing incineration treatment using waste such as municipal waste as an object to be incinerated.

Fig. 1 is a diagram showing a structure of a combustion furnace facility according to the present embodiment. The combustion furnace facility 100 includes a grate furnace 1, an exhaust heat recovery boiler 8, a temperature reduction tower 9, a dust collecting device 11, an outlet flow path 12, and a chimney 13.

(grate furnace)

The grate furnace 1 is a furnace that burns the material to be incinerated 400 while conveying the material. As the combustion of the material to be incinerated 400 is performed by the grate furnace 1, exhaust gas is generated from the grate furnace 1. The exhaust gas is sent to an exhaust heat recovery boiler 8 provided in the upper part of the grate furnace 1.

The exhaust heat recovery boiler 8 generates steam by heating water through heat exchange between the exhaust gas and the water. The steam is used in an external device not shown. The exhaust gas having passed through the exhaust heat recovery boiler 8 is cooled by the temperature reduction tower 9, and then sent to the dust collector 11. After soot and dust are removed by the dust collector 11, the exhaust gas is discharged to the atmosphere through the outlet passage 12 and the chimney 13.

The grate furnace 1 has a furnace main body 10, a hopper 3, a feeder 31, a grate 6, a windbox 2, a discharge chute 14, a blower B, an air preheater H, a furnace 7, a primary air line L1, a secondary air line L2, a camera 220, and a control device 300.

(furnace body)

A treatment space V for burning the material to be incinerated 400 is formed inside the furnace main body 10. In the processing space V, the material to be incinerated 400 is burned and conveyed toward the conveyance direction Da. The incinerated objects 400 are discharged to the outside through the discharge chute 14.

The conveyance direction Da side in this specification is a direction in which the material to be incinerated 400 travels from the hopper 3 to the discharge chute 14. The other side of the conveying direction Da is a direction opposite to the one side of the conveying direction Da.

(Bunker)

The hopper 3 is an inlet for introducing the material to be incinerated 400 into the furnace main body 10. In the present embodiment, the material to be incinerated 400 is loaded into the hopper 3 from a waste crane (not shown) provided outside the grate furnace 1.

(feeder)

The feeder 31 is a device for supplying the material to be incinerated 400 charged into the hopper 3 to the treatment space V of the furnace main body 10. In the present embodiment, the feeder 31 has a plate shape. The feeder 31 advances and retreats in the conveying direction Da by the feeder 31 itself, and the object to be incinerated 400 accumulated on the upper surface of the feeder 31 is pushed out into the processing space V at a predetermined timing. The feeder 31 pushes the material 400 to be incinerated out of the treatment space V to supply the material 400 to the grate 6.

(fire grate)

The grate 6 is composed of a plurality of grate segments which form an upper surface on which the material to be incinerated 400 is supplied in layers from the feeder 31. The fire grate segment is composed of a fixed fire grate segment and a movable fire grate segment. The fixed grate segments are fixed to the upper surface of the windbox 2. The movable grate segment moves at a constant speed to one side (downstream side) in the conveying direction Da and the other side (upstream side) in the conveying direction Da, and conveys the object 400 to the downstream side while stirring and mixing the object 400 positioned on the movable grate segment and the fixed grate segment. The grate 6 transports the object 400 to be incinerated horizontally toward the discharge chute 14 while burning the object 400 supplied in a layered form to the upper surface.

The furnace main body 10 includes a drying section 21, a combustion section 22, and a post-combustion section 23 in this order from the other side in the conveyance direction Da. The drying section 21, the combustion section 22, and the post-combustion section 23 define a processing space V in the conveyance direction Da. The drying section 21 is an area for drying the material to be incinerated 400 fed from the hopper 3 before burning on the grate 6.

The combustion section 22 and the post-combustion section 23 are regions for burning the material to be incinerated 400 in a dry state on the grate 6. In the combustion section 22, diffusion combustion occurs by the thermal decomposition gas generated from the material to be incinerated 400, and a flare F is generated. In the post-combustion stage 23, the fixed carbon combustion after the diffusion combustion of the object 400 occurs, and therefore the flare F is not generated. Therefore, the flare F generated with the combustion is mainly formed in the combustion section 22.

The flare F has a burnout length Z at an end portion on the side of the flare F in the conveyance direction Da. The burnout length Z is a point on the grate 6 indicating the end of the diffusion combustion of the material to be incinerated 400 in the combustion zone 22, and is one of the indexes used for control to achieve appropriate combustion in the grate furnace 1.

(wind box)

The wind box 2 is supplied with air from below the grate 6. A plurality of wind boxes 2 are arranged in the conveyance direction Da. In the present embodiment, the wind box 2 defines a drying stage 21, a combustion stage 22, and a post-combustion stage 23.

(discharge chute)

The discharge chute 14 is provided at an end portion of the post-combustion stage 23 on the side of the conveying direction Da. The discharge chute 14 is a device for dropping the burned material 400, which has been burned and turned into ash, toward an ash pushing device (not shown) located at the lower portion of the furnace main body 10.

(air-blower)

The blower B blows air toward the inside of the furnace main body 10. The blower B determines the pressure of the air to be fed under pressure based on the rotation speed of the fan.

The blower B has a first blower B1 and a second blower B2. The first blower B1 sends air under pressure to the wind box 2 through a primary air line L1 described later. The second blower B2 pumps air toward the furnace 7 through a secondary air line L2 described later.

(air preheater)

The air preheater H preheats air pressure-fed from the first blower B1.

(stove)

The burner 7 extends upward from an upper portion of the burner body 10. The exhaust gas generated in the processing space V is sent to the exhaust heat recovery boiler 8 through the furnace 7.

(Primary air line)

A primary air line L1 connects the first blower B1 with the wind box 2. By driving the first blower B1, air necessary for combustion of the object 400 to be incinerated (hereinafter, referred to as primary air) is supplied to the windbox 2 through the primary air line L1. The primary air line L1 has a primary air damper L1a. The primary air damper L1a is provided in the middle of the primary air line L1, and the flow rate of the primary air in the primary air line L1 is limited by the opening degree of the damper.

(Secondary air line)

A secondary air line L2 connects the second blower B2 with the furnace 7. By driving the second blower B2, air necessary for combustion of the object 400 to be incinerated (hereinafter, referred to as secondary air) is supplied into the furnace 7 through a secondary air line L2, and the secondary air goes from above the grate 6 toward the object 400 to be incinerated. The secondary air line L2 has a secondary air damper L2a. The secondary air damper L2a is provided in the middle of the secondary air line L2, and the flow rate of the secondary air is limited by the opening degree of the damper.

(vidicon)

The camera 220 has an infrared camera and a visible light camera, and is provided on the top inside the furnace main body 10. In the processed image generated by imaging the inside of the furnace main body 10 with the camera 220, the areas of the feeder 31, the drying stage 21, the combustion stage 22, and the post-combustion stage 23 are predetermined.

The infrared camera photographs the inside of the furnace main body 10 at a wavelength band of 3.5 to 4.5 μm and generates a processed image. Hereinafter, a process image generated by imaging the inside of the furnace body 10 with the infrared camera is referred to as a feeder image 315a. At least the region including the feeder 31 is included in the shooting range of the camera 220. Since the infrared camera takes pictures in the above-described wavelength band, the optical flame F is transmitted therethrough, and is not substantially reflected in the generated feeder image 315a.

The visible light camera photographs the inside of the furnace main body 10 in a wavelength band of a visible light wavelength range and generates a processed image. Hereinafter, a process image generated by capturing an image of the inside of the furnace body 10 with a visible light camera is referred to as an in-furnace image. At least the flare F is included in the shooting range of the camera 220. Since the visible light camera takes an image in the above wavelength band, the flare F cannot be transmitted, and the flare F is mainly reflected in the generated in-furnace image. The flare F is mainly generated in the combustion section 22, and thus the flare F mainly reflects the upper half of the in-furnace image.

(control device)

Next, the configuration of the control device 300 according to the present embodiment will be described with reference to fig. 2 to 7.

As shown in fig. 2, the control device 300 includes a feeder operation acquiring unit 310, an image acquiring unit 315, a luminance change determining unit 320, a feeder operation limiting unit 325, a feeder speed control unit 330, a supply state determining unit 335, an excess supply determining unit 340, an exhaust gas concentration acquiring unit 345, a secondary air amount control unit 350, a combustion state acquiring unit 355, a combustion state determining unit 360, and a combustion control unit 365.

The control device 300 is connected to the burner apparatus 100 in a wired or wireless manner.

(feeder operation acquiring unit)

The feeder-motion acquiring unit 310 acquires motion information of the forward/backward state of the feeder 31.

Specifically, the feeder operation acquiring unit 310 acquires the operation information of the feeder 31 by the operation described below.

The feeder operation acquiring unit 310 acquires the confirmation of the forward/backward state of the feeder 31 and the forward/backward amount in the conveying direction Da with time. Fig. 3 shows an example of the forward/backward movement state of the feeder 31 confirmed by the feeder operation acquiring unit 310.

The feeder 31 is set to, for example, the position shown in fig. 3 (a) as an initial position, and continuously transits to the state shown in fig. 3 (b) and continuously transits to the state shown in fig. 3 (c) at predetermined timing. Thereby, the material to be incinerated 400 stacked in the hopper 3 is pushed out into the furnace main body 10 by the feeder 31. After the completion of pushing the material to be incinerated 400 out of the furnace main body 10, the feeder 31 returns to the initial position shown in fig. 3 (a) after passing through the state shown in fig. 3 (b).

The feeder operation acquiring unit 310 determines the forward/backward movement state of the feeder 31 by checking the transition state of the feeder 31 with time.

When confirming that feeder 31 is transitioning from fig. 3 (a) to fig. 3 (c), feeder operation acquiring unit 310 determines that feeder 31 is moving forward.

When confirming that feeder 31 is transitioning from fig. 3 (c) to fig. 3 (a), feeder operation acquiring unit 310 determines that feeder 31 is moving backward.

When confirming that feeder 31 maintains the state shown in fig. 3 (a), feeder operation acquiring unit 310 determines that feeder 31 is "stopped".

(image acquiring section)

The image acquisition section 315 acquires a feeder image 315a captured by the camera 220 over time. In the present embodiment, the image acquisition section 315 acquires feeder images 315a at intervals of 1 second, for example.

(luminance change determination section)

The luminance change determination section 320 receives the feeder image 315a acquired by the image acquisition section 315, and determines the luminance change of the region including the feeder 31 based on the received feeder image 315a.

Specifically, the luminance change determination unit 320 determines the luminance by the operation described below.

The luminance change determination section 320 receives the feeder images 315a sequentially acquired from the image acquisition section 315 over time by the image acquisition section 315. Fig. 4 shows an example of the feeder image 315a received by the luminance change determination unit 320. In the feeder image 315a captured by the camera 220, an area including the feeder 31 (referred to as a determination area 320a in the present embodiment) is determined in advance.

The luminance change determination unit 320 calculates the average luminance (average value of luminance) of each pixel of the determination region 320a reflected in the sequentially received feeder image 315a. In the present embodiment, fig. 4 shows an example in which the determination area 320a is divided into twenty meshes (mesh) by imaginary lines (two-dot chain lines). That is, the luminance change determination unit 320 calculates the average luminance calculated from all the pixels included in each grid for each grid, and further for each feeder image 315a.

After the average brightness in each grid of one feeder-image 315a is calculated, the brightness change determining part 320 calculates the average brightness in each grid of the feeder-image 315a received next to the one feeder-image 315a (hereinafter, referred to as the next feeder-image 315 a). The luminance change determination section 320 compares the average luminance in each grid of one feeder image 315a with the average luminance in each grid of the next feeder image 315a, respectively.

The luminance change determination unit 320 determines whether or not the average luminance changes by a predetermined threshold value or more between each grid of one feeder image 315a and each grid of the next feeder image 315a. In the present embodiment, the image acquisition section 315 acquires feeder images 315a at 1-second intervals. Thus, the difference in time between the acquisition of one feeder-image 315a and the acquisition of the next feeder-image 315a is 1 second.

When it is determined that the average luminance of one grid or more has changed, the luminance change determination unit 320 determines that "the luminance distribution has changed". The luminance change determination section 320 determines that "the luminance distribution is not changed" when it is determined that the average luminance is changed only by less than a predetermined threshold value between each grid of one feeder image 315a and each grid of the next feeder image 315a. Therefore, the luminance change determination section 320 determines the change in luminance of each of the plurality of meshes in the feeder image 315a.

In the present embodiment, the object 400 to be incinerated, which is present in the region including the feeder 31, exhibits relatively high brightness when its surface is dry and relatively low brightness when its surface is not dry. Therefore, when a part of the object 400 including the dried surface is pushed out into the furnace main body 10 by the feeder 31, the object 400 inside which is not dried is exposed. Thus, the average brightness varies between one grid of one feeder image 315a and the grid of the next feeder image 315a corresponding to one grid.

(supply state determining part)

The supply state determination unit 335 determines whether the supply amount of the material to be incinerated 400 is sufficient based on the determination of the change in the luminance of the feeder image 315a and the information on the operation of the feeder 31.

The supply state determination unit 335 determines that the supply amount of the material to be incinerated 400 is "insufficient" when the feeder operation acquisition unit 310 determines that "the feeder 31 is moving backward" or "the feeder 31 is stopped", or when the brightness change determination unit 320 determines that "the brightness distribution is not changed".

The supply state determination unit 335 determines that the supply amount of the material to be incinerated 400 is sufficient when the feeder operation acquisition unit 310 determines that the feeder 31 is moving forward and when the brightness change determination unit 320 determines that the brightness distribution is changed.

(feeder speed control part)

The feeder speed control unit 330 increases the operating speed of the feeder 31 when the supply state determination unit 335 determines that the supply amount of the material to be incinerated 400 is insufficient. The operating speed of the feeder 31 refers to a speed at which the feeder 31 advances (a speed of transition from fig. 3 (a) to fig. 3 (c)) and a speed at which the feeder 31 retreats (a speed of transition from fig. 3 (c) to fig. 3 (a)).

(oversupply judging section)

When the supply state determination unit 335 determines that "the supply amount of the material to be incinerated 400 is sufficient", the excessive supply determination unit 340 determines whether the supply amount of the material to be incinerated 400 is excessive based on the number of areas (meshes) in which the luminance change is specified.

The overfeed judging section 340 receives the one feeder-image 315a and the next feeder-image 315a processed by the luminance change determining section 320, and confirms the number of meshes in which the luminance distribution is changed between the received one feeder-image 315a and the next feeder-image 315a.

The excessive supply determination unit 340 determines that the object 400 to be incinerated is excessively supplied when the luminance distribution changes for a predetermined number of grids or more after the number of grids is confirmed.

The excessive supply determination unit 340 determines that the object 400 is not excessively supplied when only a number of meshes smaller than the predetermined number changes in the luminance distribution after the number of meshes is confirmed.

In the excessive supply determination unit 340 of the present embodiment, for example, two or more grids of a predetermined number or more are used as appropriate.

(feeder operation restriction part)

The feeder operation limiting unit 325 limits the operation amount of the feeder 31 per unit time. In the present embodiment, the operation amount of the feeder 31 per unit time is, for example, an integrated value of the advancing and retreating distance a of the feeder 31 per ten minutes. The feeder operation limiting unit 325 sets an upper limit to the supply amount of the material to be incinerated 400 by controlling the integrated value per unit time, and limits the supply of the material to be incinerated 400 to a predetermined amount or more.

(exhaust gas concentration obtaining section)

When the excessive supply determination unit 340 determines that the material to be incinerated 400 is excessively supplied, the exhaust gas concentration acquisition unit 345 acquires the CO concentration and NO in the exhaust gas discharged from the furnace main body 10 at a predetermined timing over time _X And (4) concentration.

The exhaust gas concentration acquisition part 345 has exhaust gasA concentration detection sensor 346. An exhaust gas concentration detection sensor 346 is provided in the outlet passage 12 and has a CO sensor 345a capable of detecting a CO concentration and a CO sensor capable of detecting NO _X Concentration of NO _X A sensor 345b.

(Secondary air quantity control part)

The secondary air amount control unit 350 receives the CO concentration and NO obtained by the exhaust gas concentration obtaining unit 345 _X The concentration controls the flow rate of the secondary air flowing in the secondary air line L2 based on the respective concentrations received. The secondary air amount control portion 350 controls the flow rate of the secondary air by the opening degree of a secondary air damper L2a provided in the secondary air line L2.

As shown in (a) of fig. 5 and (b) of fig. 5, the secondary air amount control unit 350 sets a CO index (index) corresponding to the CO concentration acquired by the exhaust gas concentration acquisition unit 345 and a NO corresponding to the NO concentration acquired by the exhaust gas concentration acquisition unit 345 _X In corresponding concentration of NO _X And (4) indexes. CO index and NO _X The indexes are CO concentration and NO for determining the opening degree of the secondary air damper L2a _X And (4) index corresponding to concentration.

Hereinafter, a process (flowchart) of setting the CO index by the secondary air amount control unit 350 will be described with reference to fig. 5a.

First, the secondary air amount control unit 350 determines whether or not the one-hour average of the CO concentration received from the exhaust gas concentration acquisition unit 345 is less than 3ppm (step S61 a). When determining that the average one-hour CO concentration is less than 3ppm (step S61a; yes), the secondary air amount control unit 350 sets the CO index to "5" (step S65 a).

When determining that the CO concentration is not less than 3ppm (step S61a; no), the secondary air amount control unit 350 determines whether the one-hour average of the CO concentration is 3ppm or more and less than 6ppm (step S62 a). When the secondary air amount control unit 350 determines that the average one-hour CO concentration is 3ppm or more and less than 6ppm (step S62a; yes), the CO index is set to "4" (step S66 a).

When determining that the CO concentration is not less than 3ppm and less than 6ppm (step S62a; no), the secondary air amount control unit 350 determines whether the average one-hour CO concentration is not less than 6ppm and less than 9ppm (step S63 a). When the secondary air amount control unit 350 determines that the average one-hour CO concentration is 6ppm or more and less than 9ppm (step S63a; yes), the CO index is set to "3" (step S67 a).

When determining that the CO concentration is not less than 6ppm and less than 9ppm (step S63a; no), the secondary air amount control unit 350 determines whether the average one-hour CO concentration is not less than 9ppm and less than 12ppm (step S64 a). When the secondary air amount control unit 350 determines that the average one-hour CO concentration is 9ppm or more and less than 12ppm (step S64a; yes), the CO index is set to "2" (step S68 a).

When determining that the CO concentration is not 9ppm or more and less than 12ppm (step S64a; no), the secondary air amount control unit 350 sets the CO index to "1" (step S69 a).

Hereinafter, referring to (b) of fig. 5, NO to the secondary air amount control part 350 _X The setting process (flowchart) of the index will be explained.

First, the secondary air amount control unit 350 determines NO received from the exhaust gas concentration acquisition unit 345 _X Whether or not the one-hour average of the concentration is less than 95ppm (step S61 b). The secondary air amount control part 350 determines that NO is present _X When the concentration is less than 95ppm on average in one hour (step S61b; YES), NO is added _X The index is set to "5" (step S65 b).

The secondary air amount control part 350 determines that NO is present _X When the concentration is not less than 95ppm (step S61b; NO), the NO is judged _X Whether or not the concentration is 95ppm or more and less than 100ppm on average in one hour (step S62 b). The secondary air amount control part 350 determines that NO is present _X When the concentration is 95ppm or more and less than 100ppm on average in one hour (step S62b; YES), NO is added _X The index is set to "4" (step S66 b).

The secondary air amount control part 350 determines that NO is present _X When the concentration is not 95ppm or more but less than 100ppm (step S62b; NO), the NO is judged _X Whether or not the concentration is 100ppm or more and less than 105ppm on average in one hour (step S63 b). Secondary airThe quantity control unit 350 determines the NO _X When the concentration is 100ppm or more and less than 105ppm on average in one hour (step S63b; YES), NO is added _X The index is set to "3" (step S67 b).

The secondary air amount control part 350 determines that NO is present _X When the concentration is not 100ppm or more but less than 105ppm (step S63b; NO), the NO is judged _X Whether or not the one-hour average concentration is 105ppm or more and less than 110ppm (step S64 b). The secondary air amount control part 350 determines that NO is present _X When the concentration is 105ppm or more and less than 110ppm on average in one hour (step S64b; YES), NO is added _X The index is set to "2" (step S68 b).

The secondary air amount control part 350 determines that NO is present _X When the concentration is not 105ppm or more and less than 110ppm (step S64b; NO), NO is added _X The index is set to "1" (step S69 b).

The secondary air amount control unit 350 sets the CO index and NO _X After indexing, based on the CO index and NO _X The index and the number of meshes in which the luminance distribution is changed, which is confirmed by the excess supply determination unit 340, control of the secondary air flow rate is performed.

The secondary air amount control unit 350 controls the flow rate of the secondary air by controlling the opening degree of the secondary air damper L2a.

Fig. 6 shows a table of the number of grids in which the luminance distribution is changed, which is confirmed by the excessive supply determination unit 340, that is, the opening degree condition of the damper according to the supply degree of the material to be incinerated 400.

Fig. 6 (a) shows, for example, the basic conditions of the opening degree of the secondary air damper L2a used by the secondary air amount control unit 350 in the normal operation (the excessive supply determination unit 340 determines that the supply amount of the material to be incinerated 400 is "not excessive"). Based on the CO index and NO set by the secondary air amount control section 350 _X The index determines the opening degree of the secondary air damper L2a. In the present embodiment, the opening degree of the damper shown in fig. 6 is shown in a proportion (%) where the fully open state is 100 (%).

Fig. 6 (b) and 6 (c) show, for example, conditions of the opening degree of the secondary air damper L2a used by the secondary air amount control unit 350 when the overfeed determination unit 340 determines that the supply amount of the material to be incinerated 400 is excessive. Fig. 6 (b) shows an intermediate condition of the opening degree of the secondary air damper L2a, and fig. 6 (c) shows a maximum condition of the opening degree of the secondary air damper L2a.

The maximum condition shown in fig. 6 (c) is compared with the intermediate condition shown in fig. 6 (b), regardless of the CO index and NO _X The index is set to a value at which the opening degree is large. That is, the maximum condition is a condition adopted in the following state: in the combustion furnace in which the material to be incinerated 400 is in the oversupply state, the material to be incinerated 400 is not easily burned. Whether the opening degree of the secondary air damper L2a is set to the intermediate condition or the maximum condition is appropriately selected according to the supply degree of the material to be incinerated 400.

In the present embodiment, the opening condition of the secondary air damper L2a is selected based on the number of grids in which the luminance distribution changes, which is confirmed by the rich supply determination unit 340. Therefore, the intermediate condition is selected when the number of grids in which the luminance distribution is changed, which is confirmed by the excessive supply determination unit 340, falls within a predetermined range, and the maximum condition is selected when the number of grids is equal to or greater than a predetermined number.

(burning State acquisition part)

The combustion state acquiring unit 355 acquires the combustion state of the material to be incinerated 400 inside the furnace body 10. In the present embodiment, the combustion state of the material to be incinerated 400 refers to, for example, the temperature of the exhaust gas generated by combustion of the material to be incinerated 400 in the furnace main body 10.

The combustion state acquiring unit 355 includes an exhaust gas thermometer 355a. The exhaust gas temperature meter 355a is provided inside the exhaust heat recovery boiler 8. The exhaust gas thermometer 355a measures the temperature of the exhaust gas generated from the inside of the furnace main body 10 and sent to the exhaust heat recovery boiler 8 through the furnace 7.

(Combustion state determining part)

The combustion state determination unit 360 determines whether or not the object 400 to be incinerated is defective in combustion based on the combustion state acquired by the combustion state acquisition unit 355.

The combustion state determining unit 360 receives the exhaust gas temperature acquired by the combustion state acquiring unit 355.

The combustion state determination unit 360 compares the received exhaust gas temperature with a predetermined temperature set in advance for comparison, and determines that "combustion failure has not occurred" when a temperature equal to or higher than the predetermined temperature is confirmed.

The combustion state determination unit 360 compares the received exhaust gas temperature with a predetermined temperature for comparison, and determines that "combustion failure" is present when it is confirmed that the exhaust gas temperature is lower than the predetermined temperature for comparison.

(Combustion control section)

The combustion control unit 365 performs control to promote combustion in the furnace main body 10 when the supply state determination unit 335 determines that "the supply amount of the material to be incinerated 400 is sufficient" and the combustion state determination unit 360 determines that "combustion is poor".

The combustion controller 365 calculates a control amount based on the combustion state acquired by the combustion state acquirer 355.

The combustion control unit 365 calculates the control amount, and then appropriately performs any one or a plurality of controls (a) to (d) described below.

(a) Increase of primary air amount

Combustion control unit 365 sends a command to first blower B1 to increase the rotation speed of first blower B1. Upon receiving the command sent from the combustion control unit 365, the first blower B1 increases the rotation speed by the amount of the control amount. That is, the combustion controller 365 increases the flow rate of the primary air blown from the first blower B1 to the bellows 2 through the primary air line L1.

(b) Increase of throttle opening

The combustion controller 365 sends a command to increase the opening degree of the primary air damper L1a to the primary air damper L1a provided in the primary air line L1. Upon receiving the command sent from the combustion control unit 365, the primary air damper L1a increases the damper opening by the amount of the control amount. That is, the combustion controller 365 increases the flow rate of the primary air blown from the first blower B1 to the bellows 2 through the primary air line L1.

(c) Rise of primary air temperature

The combustion control unit 365 sends a command to raise the warm-up temperature to the air heater H. Upon receiving the command sent from the combustion control unit 365, the air heater H increases the preheating temperature by the control amount. That is, the combustion controller 365 increases the temperature of the primary air blown from the first blower B1 to the bellows 2 through the primary air line L1.

(d) Velocity increase of grate segments

The combustion control unit 365 sends a command to the grate 6 to increase the speed of the movable grate segments. Upon receiving the command sent from the combustion control unit 365, the grate 6 increases the movable speed of the movable grate segment by the control amount. That is, the combustion control unit 365 stirs the material to be incinerated 400 in the combustion furnace.

(operation of the control device)

Next, the operation of the control device 300 will be described with reference to fig. 7. Fig. 7 is a flowchart showing the operation of the control device 300.

The feeder-motion obtaining unit 310 obtains information on the motion of the feeder 31.

The image obtaining section 315 obtains the feeder image 315a with time (step S1).

The luminance change determination portion 320 determines the luminance change based on the feeder image 315a acquired by the image acquisition portion 315 over time.

The supply state determination unit 335 determines whether the supply amount of the material to be incinerated 400 is sufficient based on the luminance change determined by the luminance change determination unit 320 and the operation information of the feeder 31 acquired by the feeder operation acquisition unit 310 (step S2).

When the supply state decision unit 335 decides that the supply amount of the material to be incinerated 400 is insufficient (step S2; no), the feeder speed control unit 330 increases the operating speed of the feeder 31 (step S3).

After the feeder speed control unit 330 increases the operating speed of the feeder 31, the process of the control device 300 returns to step S2.

When the supply state judgment part 335 judges that the supply amount of the material to be incinerated 400 is sufficient (step S2; yes), the excessive supply judgment part 340 judges whether or not the material to be incinerated 400 is excessively supplied (step S4).

When the excessive supply determination unit 340 determines that the supply amount of the material to be incinerated 400 is excessive (step S4; YES), the exhaust gas concentration acquisition unit 345 acquires the CO concentration and NO in the exhaust gas discharged from the furnace main body 10 _X Concentration (step S5).

The secondary air amount control unit 350 receives the CO concentration and NO acquired by the exhaust gas concentration acquisition unit 345 _X The concentrations and the flow rate of the secondary air flowing in the secondary air line L2 are controlled based on the respective concentrations (step S6).

When the excessive supply determining unit 340 determines that the supply amount of the material to be incinerated 400 is not excessive (step S4; no), the combustion state acquiring unit 355 acquires the combustion state of the material to be incinerated 400.

The combustion state determination unit 360 determines whether or not the object 400 to be incinerated is defective in combustion based on the combustion state acquired by the combustion state acquisition unit 355 (step S7).

When the combustion state determination unit 360 determines that the combustion failure has not occurred (step S7; no), the control device 300 once ends the operation.

When the combustion state determination unit 360 determines that the combustion is defective (step S7; yes), the combustion control unit 365 calculates a control amount based on the combustion state acquired by the combustion state acquisition unit 355 (step S8).

The combustion control unit 365 calculates the control amount and then performs control to promote combustion in the furnace main body 10 (step S9).

After the combustion control unit 365 performs the control of promoting the combustion, the combustion state acquisition unit 355 acquires the combustion state of the material to be incinerated 400 again.

The combustion state determination unit 360 determines again whether or not the material to be incinerated 400 is poor in combustion based on the combustion state acquired again by the combustion state acquisition unit 355 (step S10).

When the combustion state determining unit 360 determines that the combustion is defective (step S10; yes), the feeder operation restricting unit 325 restricts the operation amount of the feeder 31 per unit time (step S11). After the feeder operation restricting unit 325 restricts the operation amount of the feeder 31 per unit time, the process of the control device 300 returns to step S8.

When the combustion state determination unit 360 determines that the combustion failure has not occurred (step S10; no), the control device 300 once ends the operation.

The control device 300 repeats the above-described series of operations during the operation of the combustion furnace facility 100.

(Effect)

The control device 300 of the combustion furnace apparatus 100 according to the present embodiment is a control device 300 of the combustion furnace apparatus 100 including a furnace main body 10 and a feeder 31, the furnace main body 10 conveying an object 400 to be incinerated while burning the object 400, the feeder 31 supplying the object 400 to the furnace main body 10, wherein the control device 300 of the combustion furnace apparatus 100 includes: an image acquisition section 315 that acquires a feeder image 315a as an image of an area including the feeder 31 over time; a luminance change determining section 320 that determines a luminance change of the feeder image 315a; a feeder operation acquiring unit 310 that acquires operation information of the feeder 31; and a supply state judgment part 335 for judging whether the supply amount of the material to be incinerated 400 is sufficient or not based on the determination of the change in luminance of the feeder image 315a and the operation information of the feeder 31.

According to the above configuration, since the determination of the change in brightness and the acquisition of the operation information of the feeder 31 can be performed at the same time, it is possible to accurately grasp whether or not the supply amount of the material to be incinerated 400 by the feeder 31 is sufficient. Therefore, measures for stabilizing the combustion state of the material to be incinerated 400 can be appropriately taken in accordance with whether or not the supply amount of the material to be incinerated 400 is sufficient.

Further, ash of the object 400 floating inside the furnace main body 10 may be reflected in the imaging range of the camera 220. When the gray is reflected on the determination region 320a, the luminance of the region where the gray is reflected tends to decrease. Therefore, since the brightness is lowered similarly to the case where the undried object 400 is exposed although the object 400 is not supplied into the furnace main body 10, the brightness change determination unit 320 may erroneously determine that "the brightness distribution changes" between the one feeder image 315a and the next feeder image 315a.

According to the above configuration, since the feeder operation acquiring unit 310 can grasp the forward/backward movement state of the feeder 31, even when the luminance change determining unit 320 is erroneously determined by being affected by the ash of the incineration object 400, the erroneous operation of the control device 300 can be avoided by combining the forward/backward movement state information of the feeder 31.

The control device 300 of the combustion furnace facility 100 according to the present embodiment further includes: a combustion state acquisition unit 355 for acquiring the combustion state of the material to be incinerated 400; a combustion state determination unit 360 that determines whether or not the material to be incinerated 400 is poorly combusted, based on the combustion state; and a combustion control unit 365 that performs control to promote combustion of the furnace main body 10 when it is determined that the supply amount of the material to be incinerated 400 is sufficient and it is determined that combustion is defective.

According to the above configuration, the control for promoting combustion can be appropriately performed in accordance with the combustion state of the material to be incinerated 400. This stabilizes the combustion state of the material to be incinerated 400.

The control device 300 of the combustion furnace facility 100 according to the present embodiment further includes: the feeder operation limiting unit 325 limits the amount of operation of the feeder 31 per unit time.

With the above configuration, the supply amount of the material to be incinerated 400 on the feeder 31 and around the feeder 31 into the furnace main body 10 can be adjusted. Therefore, even when a large amount of the material 400 to be incinerated is supplied into the furnace main body 10, the supply amount of the material 400 to be incinerated into the furnace main body 10 can be adjusted in accordance with the operation amount of the feeder 31 per unit time. Therefore, the combustion state of the material to be incinerated 400 can be stabilized.

The control device 300 of the combustion furnace facility 100 according to the present embodiment further includes: the feeder speed control unit 330 increases the operating speed of the feeder 31 when it is determined that the supply amount of the material to be incinerated 400 is insufficient.

With the above configuration, the supply amount of the material to be incinerated 400 on the feeder 31 and around the feeder 31 into the furnace main body 10 can be adjusted. Therefore, even when the material 400 to be incinerated is not smoothly supplied into the furnace main body 10, the supply amount of the material 400 to be incinerated into the furnace main body 10 can be increased by increasing the operation speed of the feeder 31. Therefore, the combustion state of the material to be incinerated 400 can be promoted.

In addition, in the control device 300 of the furnace facility 100 according to the present embodiment, the luminance change specifying unit 320 specifies the change in luminance of each of the plurality of image areas in the feeder image 315a, and the supply state determining unit 335 determines whether or not the supply amount of the material to be incinerated 400 is sufficient based on the specification of the change in luminance of at least one of the image areas and the operation information of the feeder 31, and the control device 300 of the furnace facility 100 further includes: the excessive supply determination unit 340 determines whether the supply amount of the material to be incinerated 400 is excessive based on the number of regions in which the luminance change is specified, when it is determined that the supply amount of the material to be incinerated 400 is sufficient.

With the above configuration, measures for stabilizing the combustion state of the material to be incinerated 400 can be appropriately taken depending on whether the supply amount of the material to be incinerated 400 is excessive or not.

The control device 300 of the combustion furnace facility 100 according to the present embodiment further includes: the secondary air amount control unit 350 controls the amount of secondary air additionally supplied to the furnace main body 10 to be increased when it is determined that the supply amount of the material to be incinerated 400 is excessive.

With the above configuration, combustion of the material to be incinerated 400 can be promoted. Therefore, when the supply amount of the material to be incinerated 400 is excessive, the combustion state of the material to be incinerated 400 can be stabilized.

The control device 300 of the combustion furnace facility 100 according to the present embodiment further includes: an exhaust gas concentration acquisition unit 345 for acquiring CO concentration and NO in the exhaust gas discharged from the furnace main body 10 _X Concentration/secondary air amount control section 350 controls the amount of CO and NO _X The concentration control secondary air amount.

According to the above configuration, even when the exhaust gas concentration increases, the exhaust gas concentration can be stabilized by controlling the secondary air amount.

[ other embodiments ]

Although the embodiments of the present disclosure have been described in detail with reference to the drawings, the specific configurations are not limited to the configurations of the respective embodiments, and addition, omission, replacement, and other modifications of the configurations may be made without departing from the scope of the present disclosure. The present disclosure is not limited by the embodiments.

Fig. 8 is a hardware configuration diagram showing the configuration of the computer 1100 according to the present embodiment.

The computer 1100 includes a processor 1110, a main memory (main memory) 1120, a storage device (storage) 1130, and an interface 1140.

The control device 300 is installed in the computer 1100. The operations of the processing units are stored in the storage device 1130 as programs. The processor 1110 reads a program from the storage device 1130, expands the program in the main memory 1120, and executes the processing described above in accordance with the program. The processor 1110 also secures a storage area corresponding to each storage unit described above in the main memory 1120 according to the program.

The program may be a program for realizing a part of functions to be executed by the computer 1100. For example, the program may be a program that functions in combination with another program already stored in the storage device 1130 or in combination with another program installed in another device. In addition to or instead of the above configuration, the computer 1100 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device). Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, a part or all of the functions implemented by the processor 1110 may also be implemented by the integrated circuit.

Examples of the storage device 1130 include a magnetic disk, an optical magnetic disk, a semiconductor memory, and the like. The storage device 1130 may be an internal medium directly connected to a bus of the computer 1100, or may be an external medium connected to the computer 1100 via the interface 1140 or a communication line. When the program is distributed to the computer 1100 via a communication line, the computer 1100 that has received the distribution may expand the program in the main memory 1120 and execute the above-described processing. In this implementation, the storage device 1130 is a non-transitory tangible storage medium.

The program may be a program for realizing a part of the above-described functions. The program may be a program that realizes the above-described functions by combining with another program already stored in the storage device 1130, that is, a so-called differential file (differential program).

Further, the control device 300 may further include O ₂ A concentration acquisition part of ₂ The concentration acquisition unit acquires O in the exhaust gas discharged from the furnace main body 10 ₂ And (4) concentration. Further, the feeder speed control section 330 may be based on the temperature and O according to the exhaust gas ₂ The operation speed of the feeder 31 is determined based on the estimated heat input to the material to be incinerated 400 in the concentration instead of the configuration described in the above embodiment.

In this configuration, the temperature of the exhaust gas is measured by, for example, an exhaust gas thermometer 355a provided in the combustion state acquiring unit 355. The temperature of the primary air is, for example, the set temperature of the air preheater H that preheats the primary air flowing through the primary air line L1.

O ₂ The concentration acquisition unit is provided in the outlet channel 12. O is ₂ The concentration acquisition unit uses, for example, a zirconia oxygen sensor.

The heat input amount to the material to be incinerated 400 inside the furnace main body 10 can be based on the measured temperature of the exhaust gas and the O in the exhaust gas ₂ And calculating the concentration. In this configuration, an ideal heat input amount (hereinafter, referred to as an ideal heat input amount) to the material to be incinerated 400 is set as a target during operation of the combustion furnace facility 100. Then, the difference between the two is obtained to confirm in real time the temperature of the exhaust gas measured during the operation of the combustion furnace facility 100 and the O in the exhaust gas ₂ The heat input amount to the material to be incinerated 400 estimated from the concentration (hereinafter, referred to as estimated heat input amount) is larger or smaller than the ideal heat input amount。

When the estimated heat input amount is smaller than the ideal heat input amount, the feeder speed control unit 330 increases the operation speed of the feeder 31 by the difference.

When the estimated heat input amount is larger than the ideal heat input amount, the feeder speed control unit 330 decreases the operation speed of the feeder 31 by the difference.

Since the operation speed control of the feeder 31 is completed by these operations, the supply amount of the material to be incinerated 400 as fuel into the furnace main body 10 can be optimized and the estimated heat input amount can be made close to the ideal heat input amount. Therefore, the supply amount of the material to be incinerated 400 can be quickly optimized, and the exhaust gas concentration and the steam flow rate can be stabilized.

The following outlines a method of estimating the heat input amount in the above configuration.

The estimated heat input (Q) to the interior of the furnace main body 10 is based on O ₂ Concentration-dependent exhaust gas mass flow (m) _g ) Temperature (T) of exhaust gas _g ) Temperature of primary air (T) _a ) The relationship (c) is obtained by the following formula (1).

Q＝Cp×m _g ×(T _g -T _a )+H···(1)

Here, cp represents a constant pressure molar heat capacity, and H represents a heat loss. The constant pressure molar heat capacity (Cp) is a value uniquely determined in an environment where the constant pressure changes. The heat loss (H) is a loss heat obtained by summing up the amount of heat radiation, the amount of unburned loss, and the amount of sensible heat carried out by ash, and is a variable proportional to the estimated heat input Q.

The feeder 31 described in the above embodiment is configured to return to the state shown in fig. 3 (a) after continuously changing from the state shown in fig. 3 (a) to the state shown in fig. 3 (c), but is not limited to this configuration. The feeder 31 may be configured to return to the state shown in fig. 3 (a) after continuously changing from the state shown in fig. 3 (a) to the state shown in fig. 3 (b).

Note that the CO index and NO in the secondary air amount control unit 350 described in the above embodiment _X The index is classified by five stages, but is not limited to the classification by five stages. In addition, the CO index and NO are set _X CO concentration and NO at index _X In the evaluation of the concentration, the numerical value of the ratio (ppm) shown in the above embodiment differs depending on the facility in which the combustion furnace facility 100 is operated. The numerical values of the ratios shown above are examples, and are not limited to the numerical values of the ratios shown above.

The table (fig. 6) of the damper opening degree conditions referred to by the secondary air amount control unit 350 in the above embodiment is shown in three stages according to the supply degree of the material to be incinerated 400, but is not limited to three stages. The opening degrees shown in the tables are examples, and are not limited to the opening degrees shown in the tables of fig. 6 (a), 6 (b), and 6 (c).

In the above embodiment, the combustion furnace facility 100 is a waste incinerator grate, but is not limited to the waste incinerator grate. The furnace facility 100 may also be a kiln grate (kiln stoker) furnace, a biomass fluidized bed boiler, a sludge incinerator, etc.

[ accompanying notes ]

The control device for a combustion furnace facility according to the embodiment is grasped as follows, for example.

(1) The control device 300 of the combustion furnace apparatus 100 according to the first aspect is a control device 300 of a combustion furnace apparatus 100 including a furnace main body 10 and a feeder 31, the furnace main body 10 transporting an object 400 to be incinerated while combusting the object 400, the feeder 31 supplying the object 400 to be incinerated to the furnace main body 10, wherein the control device 300 of the combustion furnace apparatus 100 includes: an image acquisition section 315 that acquires a feeder image 315a as an image of an area including the feeder 31 over time; a luminance change determining part 320 that determines a luminance change of the feeder image 315a; a feeder operation acquiring unit 310 that acquires operation information of the feeder 31; and a supply state judgment part 335 that judges whether the supply amount of the incineration object 400 is sufficient or not based on the determination of the change in the luminance of the feeder image 315a and the information on the operation of the feeder 31.

This makes it possible to determine the change in brightness and to acquire the operation information of the feeder 31 at the same time, and therefore, it is possible to accurately determine whether the supply amount of the material to be incinerated 400 by the feeder 31 is sufficient. Therefore, measures for stabilizing the combustion state of the material to be incinerated 400 can be appropriately taken in accordance with whether or not the supply amount of the material to be incinerated 400 is sufficient.

(2) The control device 300 of the combustion furnace apparatus 100 according to the second aspect may be the control device 300 of the combustion furnace apparatus 100 according to (1), further including: a combustion state acquisition unit 355 for acquiring a combustion state of the material to be incinerated 400; a combustion state determination unit 360 that determines whether or not the material to be incinerated 400 is poorly combusted, based on the combustion state; and a combustion control unit 365 that performs control to promote combustion of the furnace main body 10 when it is determined that the supply amount of the material to be incinerated 400 is sufficient and it is determined that combustion is poor.

This makes it possible to appropriately perform control for promoting combustion in accordance with the combustion state of the material to be incinerated 400. Therefore, the combustion state of the material to be incinerated 400 can be stabilized.

(3) The control device 300 of the furnace apparatus 100 according to the third aspect may be the control device 300 of the furnace apparatus 100 according to (2), further including: and a feeder operation limiting unit 325 for limiting the operation amount of the feeder 31 per unit time.

This makes it possible to adjust the amount of the material to be incinerated 400 supplied to the feeder 31 and the periphery of the feeder 31 into the furnace main body 10. Therefore, even when a large amount of the material 400 to be incinerated is supplied into the furnace main body 10, the supply amount of the material 400 to be incinerated into the furnace main body 10 can be adjusted in accordance with the operation amount of the feeder 31 per unit time.

(4) The control device 300 of the combustion furnace apparatus 100 according to the fourth aspect may be the control device 300 of the combustion furnace apparatus 100 according to any one of (1) to (3), further including: the feeder speed control unit 330 increases the operating speed of the feeder 31 when it is determined that the supply amount of the material to be incinerated 400 is insufficient.

This makes it possible to adjust the amount of the material to be incinerated 400 supplied to the feeder 31 and the periphery of the feeder 31 into the furnace main body 10. Therefore, even when the material 400 to be incinerated is not smoothly supplied into the furnace main body 10, the supply amount of the material 400 to be incinerated into the furnace main body 10 can be increased by increasing the operating speed of the feeder 31.

(5) The control device 300 of the combustion furnace apparatus 100 according to the fifth aspect may be the control device 300 of the combustion furnace apparatus 100 according to any one of (1) to (3), further including: o is ₂ A concentration acquisition part for acquiring O in the exhaust gas discharged from the furnace main body 10 ₂ Concentration; and a feeder speed control part 330 for controlling the speed of the exhaust gas based on the temperature of the exhaust gas and the oxygen ₂ The operating speed of the feeder 31 is changed according to the estimated heat input to the material to be incinerated 400.

Thus, by controlling the operating speed of the feeder 31, the supply amount of the material to be incinerated 400 into the furnace main body 10 can be optimized and the estimated heat input amount can be made to approach the target heat input amount. Therefore, the supply amount of the material to be incinerated 400 can be quickly optimized, and the exhaust gas concentration and the steam flow rate can be stabilized.

(6) The control device 300 for the furnace apparatus 100 according to the sixth aspect may be the control device 300 for the furnace apparatus 100 according to any one of (1) to (5), wherein the luminance change determination unit 320 determines a change in luminance of each of a plurality of image areas in the feeder image 315a, and the supply state determination unit 335 determines whether the supply amount of the material to be incinerated 400 is sufficient based on the determination of the luminance change of at least one of the image areas and the operation information of the feeder 31, and the control device 300 for the furnace apparatus 100 further includes: the excessive supply determination unit 340 determines whether the supply amount of the material to be incinerated 400 is excessive based on the number of the regions for which the luminance change is determined, when it is determined that the supply amount of the material to be incinerated 400 is sufficient.

This makes it possible to appropriately take measures for stabilizing the combustion state of the material to be incinerated 400 depending on whether the supply amount of the material to be incinerated 400 is excessive or not.

(7) The control device 300 of the furnace facility 100 according to the seventh aspect may be the control device 300 of the furnace facility 100 according to (6), further including: the secondary air amount control unit 350 controls the amount of secondary air additionally supplied to the furnace main body 10 to be increased when it is determined that the supply amount of the material to be incinerated 400 is excessive.

This promotes combustion of the material to be incinerated 400. Therefore, when the supply amount of the material to be incinerated 400 is excessive, the combustion state of the material to be incinerated 400 can be stabilized.

(8) The control device 300 of the furnace apparatus 100 according to the eighth aspect may be the control device 300 of the furnace apparatus 100 according to (7), further including: an exhaust gas concentration acquisition unit 345 for acquiring the CO concentration and NO in the exhaust gas discharged from the furnace main body 10 _X Concentration, the secondary air amount control section 350 controls the concentration of CO and the NO based on the CO concentration and the NO _X The concentration control secondary air amount.

Thus, even when the exhaust gas concentration increases, the exhaust gas concentration can be stabilized by controlling the secondary air amount.

(9) The control device 300 of the furnace apparatus 100 according to the ninth aspect may be the control device 300 of the furnace apparatus 100 according to any one of (1) to (8), wherein the feeder image 315a is generated by the camera 220 capable of photographing in a wavelength band of 3.5 μm to 4.5 μm.

Claims

1. A control device for a combustion furnace facility, comprising a furnace main body for conveying an object to be incinerated while combusting the object to be incinerated, and a feeder for supplying the object to be incinerated to the furnace main body, wherein,

the control device for the combustion furnace equipment comprises:

an image acquisition section that acquires, over time, a feeder image that is an image of a region including the feeder;

a brightness change determination section that determines a brightness change of the feeder image;

a feeder operation acquiring unit that acquires operation information of the feeder; and

and a supply state determination unit configured to determine whether or not the supply amount of the material to be incinerated is sufficient based on the determination of the change in brightness of the feeder image and the information on the operation of the feeder.

2. The control device for a combustion furnace facility according to claim 1, further comprising:

a combustion state acquisition unit that acquires a combustion state of the material to be incinerated;

a combustion state determination unit that determines whether or not the material to be incinerated is poorly combusted, based on the combustion state; and

and a combustion control unit that performs control to promote combustion in the furnace main body when it is determined that the supply amount of the material to be incinerated is sufficient and it is determined that combustion is poor.

3. The control device for a combustion furnace facility according to claim 2, further comprising:

a feeder operation limiting part which limits the operation amount of the feeder per unit time.

4. The control device for a combustion furnace facility according to any one of claims 1 to 3, further comprising:

and a feeder speed control unit that increases the operating speed of the feeder when it is determined that the supply amount of the material to be incinerated is insufficient.

5. The control device for a combustion furnace facility according to any one of claims 1 to 3, further comprising:

O ₂ a concentration acquisition part for acquiring O in the exhaust gas discharged from the furnace main body ₂ Concentration; and

a feeder speed control part based on the temperature according to the exhaust gas and the O ₂ The operating speed of the feeder is changed according to the heat input amount to the material to be incinerated, which is obtained by estimating the concentration.

6. The control device for a combustion furnace apparatus according to any one of claims 1 to 5,

the brightness change determination section determines a change in brightness of each of a plurality of image areas in the feeder image,

the supply state determination section determines whether or not the supply amount of the material to be incinerated is sufficient based on the determination of the change in brightness of at least one of the image areas and the information on the operation of the feeder,

the control device for a combustion furnace facility further includes: and an excessive supply determination unit configured to determine whether or not the supply amount of the material to be incinerated is excessive based on the number of the regions for which the luminance change is determined, when it is determined that the supply amount of the material to be incinerated is sufficient.

7. The control device for a combustion furnace facility according to claim 6, further comprising:

and a secondary air amount control unit that controls the amount of secondary air additionally supplied to the furnace main body to be increased when it is determined that the supply amount of the material to be incinerated is excessive.

8. The control device for a combustion furnace facility according to claim 7, further comprising:

an exhaust gas concentration acquisition unit for acquiring CO concentration and NO in the exhaust gas discharged from the furnace main body _X The concentration of the active ingredients in the mixture is,

the secondary air amount control section is based on the CO concentration and the NO _X The concentration controls the secondary air amount.

9. The control device for a combustion furnace apparatus according to any one of claims 1 to 8,

the feeder image is generated by a camera that can take a band of 3.5 μm to 4.5 μm.