JP3516098B2 - Incombustible emission control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for monitoring and controlling the discharge status of incombustibles discharged from an incinerator in an incinerator of a fluidized bed type incinerator for incinerating incinerators containing incombustibles. The present invention relates to an incombustible emission control device.

[0002]

2. Description of the Related Art A conventional fluidized bed type incinerator is an oven for incinerating municipal wastes or industrial wastes in a fluidized bed using silica sand or the like as a fluid medium. In this type of furnace, the incinerated matter is supplied to a fluidized medium kept at a high temperature of about 600 to 800 degrees Celsius, and the combustibles and water in the incinerated matter are combusted and decomposed during incineration into carbon dioxide or water. It is discharged outside the system. However, non-combustible materials such as metal, rubble, glass, etc. accumulate in the fluidized bed.

If this is left as it is, the flow of the fluidized bed is obstructed by the incombustible material in the fluidized bed, and the air is unbalanced,
A local high temperature may result in poor combustion or clinker formation.

Thus, in the conventional fluidized bed incinerator,
It is necessary to remove the incombustibles together with the fluidized medium from the bottom of the furnace using an appropriate method, separate the fluidized medium and the incombustibles with a sieve, return the fluidized medium to the inside of the bed, and discharge the incombustibles out of the system.

On the other hand, in the fluidized state, the pressure of the fluidized bed is the sum of the pressure loss of the air diffusing pipe (a perforated plate, a dispersed plate or the like is used depending on the furnace) and the weight of the fluidized medium.

Therefore, if an incombustible substance is mixed in the fluidized medium, the pressure of the fluidized bed should rise accordingly. Therefore, when the incombustible substance is taken out, the pressure of the fluidized bed is monitored, and the pressure exceeds a certain value. The method is to start it once and stop it when it drops below a certain level.

Further, since the volume of the fluidized bed increases when the incombustibles are accumulated, a method of discharging the incombustibles based on the height of the fluidized bed has been conventionally considered.

Furthermore, a method is also used in which a timer is used to periodically start and stop a device for extracting incombustibles.

[0009]

However, in the above-mentioned conventional fluidized bed type incinerator, the extraction of the incombustible material contained in the fluidized bed can be performed at a high temperature for the separation operation of the incombustible material and the fluidized medium. Since it is difficult, it is necessary to operate while cooling the incombustibles extraction device with cooling water or the like.

As a result, the fluidized medium taken out is cooled in the process of separating the incombustibles, resulting in a heat loss when the fluidized medium is returned to the inside of the bed. Further, since power of the extraction device for extracting the incombustibles and utilities such as cooling water are required, it is desired to start these for a short time within a required range instead of always starting them.

On the other hand, the pressure of the fluidized bed is influenced by the fluidized state of the fluidized medium, fluctuations in the supply of incineration material, in-bed combustion, etc.
It varies as shown in FIG. Therefore, in the method of detecting the amount of incombustibles accumulated in the fluidized bed by using the fluidized bed pressure, it becomes difficult to carry out the method unless the pressure of the fluidized bed has a significant difference of a certain value or more, and it is necessary to perform the operation at an appropriate cycle. Incombustibles could not be extracted.

Further, in the method of discharging incombustibles by using the height of the fluidized bed as a guide, it is possible to confirm the height of the fluidized bed during stoppage, but since it is flowing during operation, it is difficult to obtain an appropriate value. Is.

Further, in the method of periodically starting and stopping the incombustible material withdrawing device using the timer, the withdrawal of the fluidized medium may be continued even after the incombustible material in the fluidized bed is exhausted, so that the fluidized medium can be efficiently removed. Incombustibles cannot be discharged.

Therefore, it is an object of the present invention to provide a non-combustible substance discharge control device capable of efficiently discharging the non-combustible substance according to the discharge state of the non-combustible substance.

[0015]

The incombustible material discharge control device of the present invention is a fluidized bed incinerator for incinerating incinerated material containing incombustible material, and an incombustible material removal for extracting incombustible material from the fluidized bed incinerator. Used for an incinerator having a discharge device, an incombustible material transfer device for transferring the incombustible material extracted by the incombustible material extraction device, and an incombustible material storage device for storing the incombustible material transferred by the incombustible material transfer device. In the incombustible substance discharge control device, the incombustible substance storage device has a sound collecting mechanism that is disposed in the incombustible material storage device and detects a falling sound of the incombustible material that has fallen from the incombustible material transfer device. It is characterized in that the state of accumulation of incombustibles in the fluidized bed incinerator is judged based on the sound of falling of the article.

Further, the incombustible substance discharge control device of the present invention activates the incombustible substance extraction device at a predetermined cycle, and when the activated incombustible substance extraction device is stopped, the sound collecting mechanism makes the falling noise of the incombustible substance. It is preferable to execute it when it is not detected for a predetermined time or longer.

Further, in the incombustible substance discharge control device of the present invention, when the drive time from the start-up to the stop of the incombustible substance extracting device is longer than the drive time of the previous incombustible substance extracting device, the next incombustible substance is removed. When the start-up start time of the extraction device is advanced and is shorter than the drive time of the previous incombustibles extraction device, it is preferable to delay the start-up time of the next incombustibles extraction device.

[0018]

The sound collecting mechanism provided in the incombustible material storage device detects the sound of the incombustible material falling from the incombustible material transfer device and colliding with the incombustible material storage device or the accumulated incombustible material. Here, if the collision sound is no longer maintained, it means that the incombustibles are no longer extracted from the fluidized bed type incinerator, and therefore it can be determined that the incombustibles have disappeared in the fluidized bed at this time.

As a result, the incombustible material extraction device is started by the timer and stopped when the collision noise is no longer maintained, so that the incombustible material can be extracted efficiently. At this time, the withdrawal time is compared with the previous withdrawal time, and when the withdrawal time this time is long, it means that a large amount of incombustibles are accumulated in the fluidized bed, which means that the startup cycle was too long. This means that the next startup time will be set earlier. On the other hand, when the extraction time is short, the startup cycle is too short, and the startup has started even though there are no incombustibles in the fluidized bed, so the next startup time must be set longer. .

As a result, the incombustible substance emission control device
When discharging the incombustibles accumulated in the fluidized bed of a fluidized bed type incinerator to the outside of the system, you can easily and easily check whether the incombustibles have been discharged or not. Incombustibles can be discharged so that extraction cycles can be obtained and heat loss, power cost, and utility are minimized.

[0021]

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

FIG. 1 is a flow sheet showing the relationship between an incombustible emission control device and an incinerator according to an embodiment of the present invention. The incombustibles discharge control device 6 is a fluidized bed type incinerator 3 for incinerating incineration products containing incombustibles, and an incombustibles discharge device which is an incombustibles extraction device for extracting incombustibles from the fluidized bed incinerator. 7
And an incombustible material transfer device 9 for transferring the incombustible material extracted by the dispenser device 8 and an incombustible material storage device 10 for storing the incombustible material transferred by the incombustible material transfer device 9. Used in equipment.

The incombustible material discharge control device 6 is provided with a sound collecting device 11 which is a sound collecting mechanism arranged in the incombustible material storage device 10 for detecting a falling sound of the incombustible material dropped from the incombustible material transfer device 9. The accumulation status of the incombustibles in the incinerator 3 is determined based on the falling sound of the incombustibles detected by the sound collector 11.

Next, the operation of the incinerator shown in FIG. 1 will be described. First, the incinerator 1 containing incombustibles is supplied to the incinerator 3 by the incinerator supply device 2. The incineration 1
Is mixed and stirred with the fluid medium 4 in a high temperature state forming a fluidized bed, dried and incinerated. Blower 1 for fluidized bed
5, air is sent through the air diffuser 14 for combustion and fluidization. Then, the combustible components and the water content of the incinerated material 1 become combustion gas 5 and are discharged to the outside of the furnace. On the other hand, incombustibles are accumulated in the fluidized bed.

The incombustible material discharge control device 6 issues a start and stop command to the incombustible material discharge device 7, the classifying device 8 and the incombustible material transfer device 9, and the sound collecting device 11 attached to the incombustible material storage device 10. Signal is input via the analog / digital converter 12. The classifying device 8 separates the discharge from the non-combustible substance discharging device 7 into a fluid medium and a non-combustible substance, and the fluid medium is transferred to the medium supply device 13 and reused. The incombustible material is stored in the incombustible material storage device 10 via the incombustible material transfer device 9.

Next, the operation of the incombustible substance discharge control device 6 will be described. FIG. 2 is a flowchart showing a processing procedure of the incombustible substance discharge control device according to the embodiment of the present invention. The incombustible substance discharge control device 6 activates the incombustible substance discharge device 7, the classifying device 8 and the incombustible substance transfer device 9 at an appropriate cycle (S).
1, S2, S3, S4). Then, the incombustible substances classified by the classification device 8 are stored in the incombustible substance storage device 10.

The sound collector 11 attached to the incombustible material storage device 10 samples the sound when the incombustible material falls into the incombustible material storage device 10 (S5). This is digitized by the analog / digital converter 12, and when the digitized data is below a certain threshold value for a certain period of time, it is judged that there is no falling object, and the incombustible material is incombustible. It is determined whether the material is stored in the material storage device 10 (S6).

If the dropping sound of the incombustibles is no longer measured, it is determined that the incombustibles have been discharged, and the incombustibles discharging device 7, the classifying device 8 and the incombustibles transferring device 9 are stopped (S7, S).
8, S9).

Next, the time required from the start up to the stop of the inferior material discharge device 7 etc. is stored as the current operation data (S1).
0). Then, the current operation data and the previous operation data are compared (S11), and if the current operation data is longer,
It is determined that the time until the start-up is too long and the accumulation of deposits is too long, and the process takes a long time, and the start-up cycle until the next start-up is shortened (S12). On the contrary, if the operation data is shorter this time, it is judged that the processing has started before the start time is too short and the deposits are not accumulated, and the start cycle until the next start is lengthened. (S13).

From these, the incombustible emission control device is
A sound collection mechanism such as a microphone provided in the incombustible material storage device is used to collect the sound of the incombustible material that falls and collides with the storage device or the accumulated incombustible material. Can determine that the incombustibles are gone. Therefore, if the start-up is executed by the timer and the stop is when the collision sound is no longer maintained, the incombustibles can be efficiently extracted.

At this time, the withdrawal time is compared with the previous withdrawal time, and when the withdrawal time of this time is long, it means that a large amount of incombustibles are accumulated in the fluidized bed, and this is because the start cycle is too long. This means that the next startup time will be set earlier. On the other hand, when the extraction time is short, the startup cycle is too short, and the startup has started even though there are no incombustibles in the fluidized bed, so the next startup time must be set longer. .

Therefore, according to the present invention, when discharging the incombustibles accumulated in the fluidized bed of the fluidized bed type incinerator to the outside of the system, it can be easily and easily determined whether the incombustibles are continuously discharged or completed. In addition, it is possible to discharge the incombustibles so that the optimum extraction cycle can be obtained, and the heat loss, the power cost, and the utility are minimized.

[0033]

As described above, according to the present invention, the sound collecting mechanism is attached to the incombustible material storage device, and based on the falling sound of the incombustible material detected by the sound collecting mechanism, the incombustible material in the fluidized bed incinerator is incombustible. Since the accumulation status of the incombustibles is judged, the discharge status of the incombustibles can be reliably detected, and the optimal extraction cycle of the incombustibles can be obtained, so that the heat loss, the power cost, and the utility are minimized. Ejection can be performed.

[Brief description of drawings]

FIG. 1 is a flow sheet showing the relationship between an incombustible emission control device and an incinerator according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of an incombustible substance discharge control device according to an embodiment of the present invention.

FIG. 3 is a graph showing the change over time in fluidized bed pressure in an incinerator.

[Explanation of symbols]

1 incineration 2 Incinerated matter supply device 3 incinerator 4 Fluid medium 5 Combustion gas 6 Incombustibles emission control device 7 Incombustibles discharge device 8 classifier 9 Incombustible material transfer device 10 Incombustible material storage device 11 sound collector 12 Analog / digital converter 13 Medium supply device 14 Air diffuser 15 Blower

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-52-14079 (JP, A) JP-A-61-96317 (JP, A) JP-A-5-86375 (JP, A) JP-A 62- 108020 (JP, A) JP-A-63-251539 (JP, A) Actual development 60-189735 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23G 5/50 F23C 10 / 24 F23G 5/30

Claims (3)

(57) [Claims] 1. A fluidized bed incinerator for incinerating incinerators containing incombustibles, an incombustibles extracting device for extracting incombustibles from the fluidized bed incinerator, and an incombustible extracted by the incombustibles extracting device. An incombustible material discharge control device for use in an incinerator having an incombustible material transfer device for transferring a material and an incombustible material storage device for storing an incombustible material transferred by the incombustible material transfer device, Has a sound collecting mechanism for detecting a falling sound of an incombustible material that has been dropped from the incombustible material transfer device, and in the fluidized bed incinerator based on the falling sound of the incombustible material detected by the sound collecting mechanism. An incombustible emission control device for determining the accumulation state of incombustibles in a vehicle. 2. The incombustible material discharge control device according to claim 1, wherein the incombustible material extraction device is activated at a predetermined cycle, and the activated incombustible material extraction device is stopped by the sound collecting mechanism dropping the incombustible material. An incombustible emission control device, which is executed when a sound is not detected for a predetermined time or longer. 3. The incombustible matter discharge control device according to claim 2, wherein when the drive time from the start of the incombustible matter extraction device to the stop is longer than the drive time of the previous incombustible matter extraction device, If the start time of the incombustible material extraction device is set earlier and is shorter than the drive time of the previous incombustible material extraction device, the start time of the next incombustible material extraction device will be delayed. Emission control device.