JP2017155991A - Combustion furnace, incineration facility, and method for extinguishing combustion furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion furnace that can extinguish the fire in the combustion furnace while suppressing rapid pressure rise inside the combustion furnace in loss of regular power source, and to provide an incineration facility, and a method for extinguishing a combustion furnace.SOLUTION: The combustion furnace includes: a combustion furnace body 31 for partitioning a combustion chamber 41 for combusting an object to be combusted 42; and an extinguishing foam supply source 37 for supplying the burning object 42 with extinguishing foam 44 for extinguishing the object to be combusted 42 in the combustion chamber 41.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an incinerator that burns incinerators such as municipal waste and other wastes, an incinerator equipped with an incinerator, and a method for extinguishing the incinerator.

Conventionally, an incinerator equipped with an incinerator that burns incinerators such as municipal waste and other wastes has been used. As the incinerator, for example, a stoker type incinerator (see, for example, Patent Document 1), a fluidized bed incinerator, or the like is used.
Such an incineration facility includes an exhaust gas processing facility including a bag filter provided downstream of the incinerator, an induction fan connected to the bag filter, a chimney connected to the induction fan, and the like.

JP 2003-161410 A

  By the way, in the conventional incinerator, since the incinerator is a refractory structure that combusts the incinerator, no facility for extinguishing the inside of the incinerator was provided in the first place. For this reason, if a problem occurs in the combustion state of the incinerator, stop the input of the incinerator, stop the injection of the incineration or the incineration that waits for the temperature to naturally decrease and reduce the temperature, and Emergency burning has been done to block combustion air.

However, the electric power transmitted from the outside of the incinerator facility via the electric power system may be interrupted due to a natural disaster or the like, and may take a long time for recovery.
In such a case, since the regular power source is lost, the operation control of the incinerator becomes impossible. Then, the temperature in the incinerator rises, and the generated flue gas leaks out of the furnace, or the high-temperature flue gas may damage the dust collector installed downstream of the incinerator. The present inventors considered that it is necessary to stop the combustion in the incinerator and reduce the temperature of the combustion exhaust gas as soon as possible than the emergency burning.
By the way, it is conceivable that an emergency power generation facility is installed in preparation for the loss of the normal power supply, and the incinerator is temporarily operated temporarily by the emergency power generation facility, but the operation time is limited.

  As a method for urgently extinguishing the inside of the incinerator, it is conceivable to supply water to the incinerated material that burns in the incinerator. However, in this case, since the evaporated water expands, the pressure in the incinerator rises all at once, which may damage the incinerator and its associated equipment.

  Therefore, the present invention provides an incinerator, an incineration facility, and a method for extinguishing an incinerator that can quickly extinguish the inside of the incinerator without causing a rapid pressure increase in the incinerator when the normal power supply is lost. The purpose is to provide.

  In order to solve the above problems, according to an incinerator according to an aspect of the present invention, an incinerator main body that defines a combustion chamber in which the incinerated material is combusted, and the incinerated material to be combusted in the combustion chamber, A fire-fighting foam supply source for supplying a fire-fighting foam for extinguishing the incinerator.

An incinerator according to an aspect of the present invention provides a liquid film around a gas constituting a fire-extinguishing foam by supplying a fire-extinguishing foam that extinguishes the incinerated material to a combusted incinerated substance in a combustion chamber. Since it gradually comes into contact with the incineration object, the liquid boiling (sudden boiling) is suppressed (suppressing the pressure rise in the incinerator body) and the heat of the incineration object is gradually cooled by the liquid film. Is possible.
Thereby, the inside of an incinerator can be extinguished after suppressing the rapid pressure rise in an incinerator at the time of a regular power supply loss.

  Further, in the incinerator according to one aspect of the present invention, a fire-extinguishing bubble introduction port provided in the incinerator main body for introducing the fire-extinguishing foam into the combustion chamber, and provided in the incinerator main body, the combustion chamber An incineration material supply port for supplying the incinerated material to the combustion chamber from the outside, and the fire-extinguishing foam introduction port may be provided at a position higher than the incinerated material supply port.

  Thus, by providing the fire-extinguishing foam introduction port at a position higher than the incineration object supply port, it becomes possible to supply the fire-extinguishing foam from above the incineration object. Thereby, the incinerated object can be covered with the foam for fire fighting.

  Further, in the incinerator according to one aspect of the present invention, a sensor provided at a predetermined height inside the incinerator main body for detecting the presence or absence of a predetermined amount of the fire-extinguishing foam, the sensor, and the fire-extinguishing A control device electrically connected to the foam supply source, and the control device stops the supply of the fire fighting foam by the fire fighting foam supply source when the sensor detects the fire fighting foam The fire-fighting foam may be supplied from the fire-fighting foam supply source to the combustion chamber when the sensor does not detect the fire-fighting foam.

  By providing the sensor and the control device having such a configuration, it is possible to maintain a predetermined amount (a constant amount) of fire-extinguishing foam in the combustion chamber.

  Further, in the incinerator according to one aspect of the present invention, a first temperature sensor provided at a predetermined height inside the incinerator main body for detecting the temperature of the combustion chamber, the first temperature sensor, and the A control device electrically connected to the fire-fighting foam supply source, wherein the control device detects the fire-fighting foam when the temperature detected by the first temperature sensor falls below a predetermined temperature set in advance. When the supply of the fire-fighting foam by the supply source is stopped and the temperature detected by the first temperature sensor is higher than the predetermined temperature, the fire-fighting foam is supplied from the fire-fighting foam supply source to the combustion chamber. May be.

By providing the first temperature sensor and the control device configured as described above, it is possible to keep the fire-extinguishing foam in the combustion chamber at a predetermined amount (a constant amount).
In addition, by setting the predetermined height to a high position in the incinerator body, fire extinguishing foam is filled in a part of the combustion chamber, and the inside of the incinerator body is covered with the fire extinguishing foam. And the inner wall of the incinerator main body can be cooled.

  In order to solve the above problems, according to an incineration facility according to an aspect of the present invention, the incinerator according to any one of claims 1 to 4 and a rear stage of the incinerator, the combustion chamber A dust collecting unit including a filter to which the combustion exhaust gas generated in step 1 is supplied, and a blower disposed downstream of the dust collection unit and guiding the combustion exhaust gas to the dust collection unit.

  By setting it as such a structure, since the combustion in an incinerator main body is suppressed, it becomes possible to reduce the temperature of the combustion exhaust gas which flows into the filter arrange | positioned in the back | latter stage of an incinerator. Thereby, it can suppress that a filter is damaged by high temperature combustion exhaust gas.

  Further, in the incineration facility according to one aspect of the present invention, the temperature of the combustion exhaust gas introduced into the dust collection unit is provided in a front stage of the dust collection unit and electrically connected to the control device. A second temperature sensor that detects the temperature of the combustion exhaust gas detected by the second temperature sensor, when the temperature of the combustion exhaust gas is equal to or higher than a predetermined temperature; Foam may be supplied.

  By providing such a second temperature sensor, it is possible to control so that the temperature of the combustion exhaust gas introduced into the dust collecting portion does not exceed a predetermined temperature. Thereby, for example, by setting the predetermined temperature to a temperature lower than the allowable temperature of the filter, it is possible to further suppress damage to the filter.

  The incineration facility according to one embodiment of the present invention may include an emergency power source that drives the fire-fighting foam supply source, the control device, and the blower when a normal power source is lost.

By having the emergency power supply configured as described above, the fire extinguishing process of the incinerator can be continuously performed when the normal power supply is lost.
In addition, since the blower can be driven using the emergency power supply, the pressure in the incinerator main body can be maintained at a negative pressure. Thereby, it can suppress that the combustion exhaust gas containing a pollutant is derived | led-out outside the incinerator main body from parts other than the discharge port from which the combustion gas of an incinerator main body is discharged | emitted.

  In the incineration facility according to one aspect of the present invention, the incinerator and the dust collection unit are connected, and before the combustion exhaust gas supplied from the combustion chamber is supplied to the dust collection unit, A cooling tower for cooling the combustion exhaust gas may be included.

  By including the cooling tower having such a configuration, it is possible to cool the combustion exhaust gas led out from the combustion chamber. Thereby, since it becomes possible to suppress that a high-temperature combustion exhaust gas is supplied to the filter which comprises a dust collection part, it can suppress that a filter is damaged.

  Further, in the incinerator extinguishing method according to one aspect of the present invention, the incinerator extinguishing method at the time of loss of a regular power source, wherein the incinerator is in a combustion chamber defined by an incinerator main body constituting the incinerator. A fire extinguishing step of supplying fire extinguishing foam for extinguishing an object so as to cover at least the incinerated object to be burned, and in the fire extinguishing step, the temperature of the combustion chamber or the height of the fire extinguishing foam in the combustion chamber Based on the above, the supply of the fire-fighting foam is controlled.

According to the fire extinguishing method for an incinerator according to one aspect of the present invention, it is possible to always maintain a predetermined amount (a constant amount) of fire-extinguishing foam in the combustion chamber. In addition, the incinerated material is covered with the fire-extinguishing foam to suppress the combustion reaction, and the liquid film around the gas constituting the fire-extinguishing foam comes into contact with the incinerated material that burns little by little. It is possible to gradually cool the incinerated object with the liquid film after suppressing (sudden boiling) (suppressing the pressure increase in the incinerator main body).
As a result, it is possible to extinguish the fire in the incinerator after suppressing a rapid pressure increase in the incinerator when the normal power supply is lost.
Moreover, the fire extinguishing process can be reliably performed by supplying the fire-extinguishing foam based on the temperature of the combustion chamber or the height of the fire-extinguishing foam in the combustion chamber.

  Moreover, in the fire extinguishing method for an incinerator according to one aspect of the present invention, in the fire extinguishing step, the fire extinguishing foam may be supplied so as to cover an inner surface of the incinerator main body.

In this way, by supplying the fire extinguishing foam so as to cover the inner surface of the incinerator main body, the fire extinguishing foam is filled in a part of the combustion chamber, and the inside of the incinerator main body is covered with the fire extinguishing foam. The heat storage in the chamber and the inner wall of the incinerator body can be cooled.

  Moreover, in the fire extinguishing method for an incinerator according to one aspect of the present invention, in the fire extinguishing process, a blower provided at a rear stage of a dust collection unit disposed at a rear stage of the incinerator is driven by an emergency power source. The pressure in the incinerator main body may be negative.

  In this way, by maintaining the pressure inside the incinerator body at a negative pressure, combustion exhaust gas containing pollutants is derived outside the incinerator body from the part other than the exhaust port from which the combustion gas is discharged from the incinerator body. Can be suppressed.

  Moreover, in the fire extinguishing method for an incinerator according to one aspect of the present invention, in the fire extinguishing process, the temperature of the combustion exhaust gas introduced into the dust collection unit is lower than an allowable temperature of a filter constituting the dust collection unit. As such, the supply of the fire-fighting foam may be controlled.

  As described above, the temperature of the combustion exhaust gas introduced into the dust collection part is lower than the allowable temperature of the filter constituting the dust collection part, so that the filter can be prevented from being damaged by the temperature of the introduced combustion exhaust gas. .

  Further, in the fire extinguishing method for an incinerator according to one aspect of the present invention, in the fire extinguishing step, the emergency power supply is used to supply the fire extinguishing foam and the combustion led out from the combustion chamber by a cooling tower. The exhaust gas may be cooled, and the cooling of the combustion exhaust gas may be stopped when the temperature of the combustion exhaust gas introduced into the dust collection unit becomes lower than a predetermined temperature.

  As described above, when the temperature of the combustion exhaust gas in the combustion chamber becomes lower than the predetermined temperature, the consumption of the power of the emergency power source can be reduced by stopping the cooling of the combustion exhaust gas.

  According to the present invention, it is possible to extinguish the inside of the incinerator while suppressing a rapid pressure increase in the incinerator when the regular power source is lost.

It is a figure showing typically the incineration equipment concerning a 1st embodiment of the present invention. It is the fragmentary sectional view which expanded the part enclosed by the area | region A among the incineration facilities shown in FIG. It is a fragmentary sectional view of the incinerator which shows typically other examples of the quantity of the foam for fire extinguishing of a combustion chamber at the time of fire extinguishing processing of an incinerator. It is a fragmentary sectional view of the incinerator which concerns on the 2nd Embodiment of this invention. It is a fragmentary sectional view of the incinerator which concerns on the 3rd Embodiment of this invention. It is a figure which shows schematic structure of the incineration equipment which concerns on the 4th Embodiment of this invention.

  Embodiments to which the present invention is applied will be described below in detail with reference to the drawings. Note that the drawings used in the following description are for explaining the configuration of the embodiment of the present invention, and the size, thickness, dimensions, etc. of each part shown in the figure are the dimensional relationships of the actual incinerator and incineration equipment. May be different.

(First embodiment)
Drawing 1 is a figure showing typically the incineration equipment concerning a 1st embodiment of the present invention. In addition, in FIG. 1, the following description is given taking a stoker type incinerator as an example of the incinerator 11.

  Referring to FIG. 1, an incineration facility 10 according to a first embodiment includes an incinerator 11, ducts 14 and 19, a cooling tower 15, a pump 17, a dust collecting unit 21, a blower 23, and a chimney 25. And a control device 26 and an emergency power source 29.

FIG. 2 is an enlarged partial cross-sectional view of a portion surrounded by a region A in the incineration facility shown in FIG. In FIG. 2, the incinerator main body 31, the incinerator supply port 33, the discharge port 34, and the combustion exhaust gas discharge port 35 are illustrated in cross section.
Further, FIG. 2 schematically shows a state where the incineration object 42 combusting in the combustion chamber 41 is extinguished with the extinguishing foam 44. Further, in FIG. 2, the same components as those in the structure shown in FIG.

  Referring to FIG. 2, the incinerator 11 includes an incinerator body 31, a combustion unit 32, an incinerator supply port 33, a discharge port 34, a combustion exhaust gas discharge port 35, and a fire-extinguishing foam inlet 36. , A fire-fighting foam supply source 37, a fire-fighting foam supply line 38 (pipe), a fan 45, and a combustion air supply line 46 (pipe).

The incinerator main body 31 defines a combustion chamber 41 (space) therein. The inner wall (inner side) of the incinerator main body 31 exposed to the combustion chamber 41 is made of a refractory material. In the combustion chamber 41, incineration processing of the incineration object 42 is performed. When the incineration object 42 is incinerated, high-temperature combustion exhaust gas is generated, and the incineration object 42 eventually becomes ash.
Examples of the incinerated material 42 include municipal waste and other waste.

The combustion unit 32 is accommodated in the incinerator main body 31 and is disposed in the lower part of the combustion chamber 41. The combustion unit 32 has an upper surface 32a that is inclined so that its height is lowered with respect to the direction from the incineration material supply port 33 toward the discharge port 34.
An incinerator 42 is supplied to the upper surface 32a of the combustion unit 32. The incinerated material 42 becomes ash in time by moving to the discharge port 34 side while being burned.
As the combustion unit 32, for example, a stalker configured by alternately arranging a fixed stage and a movable stage grate can be used.

The incinerator supply port 33 is provided directly above the end portion 32 </ b> A having the higher height among the both end portions 32 </ b> A and 32 </ b> B of the combustion portion 32. The incinerator supply port 33 is a supply port for introducing the incinerated material 42 from the outside of the incinerator main body 31 to the upper surface 32a of the combustion unit 32, and is, for example, a charging hopper.
The discharge port 34 is provided in the vicinity of the end portion 32 </ b> B having the lower height among the both end portions 32 </ b> A and 32 </ b> B of the combustion portion 32. The discharge port 34 discharges the incinerated material 42 that has become ash by burning out of the incinerator body 31.

The combustion exhaust gas discharge port 35 is provided above the discharge port 34 and above the incinerated material supply port 33 and the fire-extinguishing foam inlet 36. The combustion exhaust gas discharge port 35 is connected to one end of the duct 14.
The combustion exhaust gas outlet 35 discharges high-temperature combustion exhaust gas generated in the combustion chamber 41. The high-temperature combustion exhaust gas discharged from the combustion exhaust gas outlet 35 is supplied to the upper portion of the cooling tower 15 through the duct 14.

The fire-extinguishing foam inlet 36 is connected to the other end of the fire-extinguishing foam supply line 38. The fire-extinguishing foam inlet 36 is an inlet for introducing the fire-extinguishing foam 44 supplied from the fire-extinguishing foam supply source 37 into the combustion chamber 41. The fire-extinguishing foam 44 is supplied when it is desired to quickly extinguish the incinerator 11 when the normal power supply is lost.
The fire-extinguishing foam inlet 36 is closed during normal operation, and may be opened automatically or manually when the fire-extinguishing foam 44 is supplied.

The fire-extinguishing foam introduction port 36 is provided above the incineration object supply port 33. That is, the fire-extinguishing foam introduction port 36 is provided at a position higher than the incineration object supply port 33. The fire-extinguishing foam introduction port 36 is preferably disposed, for example, immediately above the incineration object supply port 33.
Thus, by providing the fire-extinguishing foam introduction port 36 at a position higher than the incineration object supply port 33, the fire-extinguishing foam 44 is supplied from above the incineration object 42 placed on the upper surface 32 a of the combustion unit 32. Therefore, the incineration object 42 can be covered with the fire-extinguishing foam 44.

The fire-extinguishing foam supply source 37 is connected to one end of the fire-extinguishing foam supply line 38. Thereby, the fire-fighting foam supply source 37 is connected to the fire-fighting foam inlet 36 via the fire-fighting foam supply line 38.
The fire-extinguishing foam supply source 37 supplies the fire-extinguishing foam 44 to the incineration object 42 placed on the upper surface 32 a of the combustion unit 32 through the fire-extinguishing foam supply line 38 and the fire-extinguishing foam introduction port 36. The fire-extinguishing foam supply source 37 supplies the fire-extinguishing foam 44 in an amount (thickness) that can cover at least the incineration object 42.
As a result, when the normal power supply is lost, the liquid film that partitions the gas (for example, air) constituting the fire-extinguishing foam 44 comes into contact with the incineration object 42 that burns little by little. It becomes possible to gradually cool the incinerated object 42 by the liquid film after suppressing (suppressing a rapid pressure increase in the combustion furnace 11).

The fire-fighting foam supply source 37 may be one using a blower that can be driven by an emergency power source 29 described later, or may be one that can be driven without the emergency power source 29.
As the fire-extinguishing foam supply source 37 that does not require the emergency power supply 29 at the time of driving, for example, a method of foaming the fire-extinguishing liquid with compressed air or compressed inert gas stored in a tank or a cylinder may be used.

As the fire-extinguishing foam 44, for example, a highly foamed foam composed of a liquid (for example, water) and a gas (for example, air) may be used. Specifically, when water is used as the liquid, the fire-extinguishing foam 44 may be, for example, a highly foamed foam composed of water and a gas several hundred times as much as water by volume ratio. As the gas constituting the fire extinguishing foam 44, for example, an inert gas heavier than air may be used.
In addition, as the foam 44 for fire extinguishing, you may use the foam extinguishing agent generally used, for example.

  The fire-extinguishing foam supply line 38 is a line for supplying the fire-extinguishing foam 44 supplied from the fire-extinguishing foam supply source 37 to the fire-extinguishing foam inlet 36.

The fan 45 is connected to one end of the combustion air supply line 46. The fan 45 supplies combustion air from the lower side of the combustion unit 32 via the combustion air supply line 46. The fan 45 stops when the regular power supply is lost.
The other end side of the combustion air supply line 46 is branched into a plurality of portions, and a portion branched into a plurality of portions is disposed in the combustion chamber 41 located below the combustion unit 32. The combustion air supply line 46 is a line for supplying combustion air to the entire lower side of the combustion unit 32.

The duct 14 has one end connected to the combustion exhaust gas outlet 35 and the other end connected to the upper portion of the cooling tower 15. The duct 14 introduces high-temperature combustion exhaust gas generated in the combustion chamber into the upper portion of the cooling tower 15.
The cooling tower 15 cools the introduced high-temperature combustion exhaust gas to a temperature equal to or lower than a predetermined temperature via the duct 14. As the cooling tower 15, for example, a water-cooled gas cooling tower can be used.
By including the cooling tower 15 having such a configuration, it is possible to cool the combustion exhaust gas led out from the combustion chamber 41. Thereby, since high temperature combustion exhaust gas is not supplied to the filter 21B which comprises the dust collection part 21, it can suppress that the filter 21B is damaged.
Here, as an example, the case where the cooling tower 15 is used has been described as an example, but other cooling equipment such as a boiler may be used instead.

The pump 17 supplies cooling water for cooling the high-temperature combustion exhaust gas into the cooling tower 15.
One end of the duct 19 is connected to the lower part of the cooling tower 15. The duct 19 leads the combustion exhaust gas cooled in the cooling tower 15 from the cooling tower 15.

The dust collection unit 21 includes a housing 21A and a filter 21B. The casing 21 </ b> A is connected to the duct 19. Thereby, the cooled combustion exhaust gas is introduced into the casing 21 </ b> A through the duct 19.
The filter 21B is accommodated in the housing 21A. The filter 21B removes particles such as dust contained in the cooled combustion exhaust gas.
As the dust collection part 21, a bag filter can be used, for example.

The blower 23 is connected to the casing 21 </ b> A and the chimney 25. The blower 23 has a function of guiding the cooled combustion exhaust gas existing in the cooling tower 15 into the housing 21 </ b> A and guiding the combustion exhaust gas from which particles such as dust are removed in the dust collection unit 21 to the chimney 25. The blower 23 has a function of maintaining the pressure in the incinerator body 31 at a negative pressure.
As the blower 23, for example, an attracting blower can be used.

  The chimney 25 releases the combustion exhaust gas from which particles such as dust supplied via the blower 23 are removed to the atmosphere.

The control device 26 is electrically connected to the pump 17, the blower 23, and the fire extinguishing foam supply source 37. That is, the control device 26 is configured to be able to control the operations of the pump 17, the blower 23, and the fire-fighting foam supply source 37.
The control device 26 includes a storage unit 26A and a control unit 26B. The storage unit 26A stores a program for operating the incineration facility 10 (including a program relating to a method for extinguishing the incinerator 11), operating conditions, various threshold values, and the like.
The control unit 26B controls the entire incineration facility 10 based on the program, operating conditions, and various threshold values stored in the storage unit 26A.

The emergency power supply 29 is electrically connected to the pump 17, the blower 23, the control device 26, and the fire extinguishing foam supply source 37 in a state where power can be supplied.
The emergency power supply 29 supplies power to the pump 17, the blower 23, the control device 26, and the fire-extinguishing foam supply source 37 when the regular power supply is lost (for example, in the case of a power failure or the like). The blower 23, the control device 26, and the fire-fighting foam supply source 37 are driven. As the emergency power source 29, for example, a diesel generator, a storage battery (a lead storage battery, a lithium ion battery, or the like) can be used.

By having the emergency power supply 29 configured as described above, the pump 17, the blower 23, the control device 26, and the fire-fighting foam supply source 37 are provided by the emergency power supply 29 even when power supply is stopped. Since it becomes possible to drive, the fire extinguishing process of the incinerated object 42 can be continued.
In addition, when the regular power supply is lost, the blower 23 is driven, and the pressure in the incinerator main body 31 can be maintained at a negative pressure. Thereby, it can suppress that the combustion exhaust gas containing a pollutant is derived | led-out outside the incinerator main body 31 from parts other than the combustion exhaust gas discharge port 35 from which the combustion exhaust gas of the incinerator main body 31 is discharged | emitted.

According to the incinerator 11 of the first embodiment, in the combustion chamber 41, the fire-extinguishing foam 44 is configured by supplying the fire-extinguishing foam 44 that extinguishes the incinerated object 42 to the incineration object 42 that burns. Since the liquid film that partitions the gas (for example, air) comes into contact with the incinerator 42 that burns little by little, the liquid 42 is gradually cooled by the liquid film while suppressing the boiling of the liquid (sudden boiling). It becomes possible to do.
Thereby, the inside of the incinerator 11 can be quickly extinguished without causing a sudden pressure increase in the incinerator 11 when the regular power supply is lost.

  The incineration facility 10 according to the first embodiment includes the emergency power supply 29 electrically connected to the pump 17, the blower 23, the control device 26, and the fire extinguishing foam supply source 37, so that when the regular power supply is lost, It becomes possible to operate the cooling tower 15 to cool the combustion exhaust gas led out from the combustion chamber 41 so as to have a temperature lower than the heat resistant temperature of the filter 21B. Thereby, damage to the filter 21B due to the temperature of the combustion exhaust gas can be suppressed.

Here, with reference to FIG.1 and FIG.2, the fire extinguishing method of the incinerator of 1st Embodiment at the time of regular power supply loss at the time of using the incineration equipment 10 mentioned above is demonstrated.
The incinerator extinguishing method of the first embodiment is an incinerator 42 that burns at least the extinguishing foam 44 in the combustion chamber 41 defined by the incinerator main body 31 constituting the incinerator 11 at the stage where the regular power source is lost. Including a fire extinguishing process to always cover
In the fire extinguishing process, the fire extinguishing foam 44 is continuously supplied to the combustion chamber 41 so that at least the incinerated object 42 is covered with the fire extinguishing foam 44 until the extinguishing process is completed.
In the fire extinguishing process, the emergency power source 29 may be used to make the pressure in the incinerator body 31 negative.

According to the fire extinguishing method of the incinerator of the first embodiment, the fire extinguishing foam 44 that extinguishes the incinerated product 42 is supplied so that at least the incinerated product 42 is kept covered with the fire extinguishing foam 44. By continuing, the liquid film around the gas constituting the fire-extinguishing foam 44 comes into contact with the incinerated object 42 that burns little by little. Therefore, after suppressing the boiling of the liquid (sudden boiling), the liquid film gradually increases. It becomes possible to cool the incinerated object.
Thereby, after suppressing the rapid pressure rise in the incinerator 11, rapid fire extinguishing in the incinerator 11 can be performed.

  FIG. 3 is a partial cross-sectional view of the incinerator schematically showing another example of the amount of fire extinguishing foam in the combustion chamber during the extinguishing process of the incinerator. In FIG. 3, a duct 14 which is a component other than the incinerator 11 is also illustrated. In FIG. 3, the same components as those in the structure shown in FIG.

In FIG. 2 described above, as an example, the case where the fire-extinguishing foam 44 is supplied so as to cover the upper surface 32a of the combustion unit 32 and the incineration object 42 has been described, but as shown in FIG. In addition, in the above-described fire extinguishing process, the fire-extinguishing foam 44 may be supplied so as to cover the inner surface of the incinerator main body 31 (inner wall made of a refractory material).
By disposing the fire extinguishing foam 44 in the combustion chamber 41 in such an amount, not only the incinerated object 42 but also the heat storage in the combustion chamber 41 and the inside of the incinerator main body 31 can be cooled. The combustion exhaust gas can be cooled more quickly.

The upper limit amount of the fire-extinguishing foam 44 in the incinerator 11 is preferably an amount such that the fire-extinguishing foam 44 does not enter the combustion exhaust gas outlet 35 as shown in FIG.
If the fire-extinguishing foam 44 is supplied in such an amount that the fire-extinguishing foam 44 enters the combustion exhaust gas discharge port 35, the fire-extinguishing foam 44 is wasted, leading to an increase in cost, which is not preferable.

  The amount of the fire-extinguishing foam 44 in the combustion chamber 41 may be an amount that can cover at least the incineration object 42 and can be set as appropriate within the above-described range.

  In the first embodiment, a stoker-type incinerator has been described as an example of the incinerator 11. However, the present invention can be applied, for example, from a low heat generation amount such as sludge to a high heat generation such as plastic. It can also be applied to fluidized bed incinerators that can incinerate large quantities.

(Second Embodiment)
FIG. 4 is a partial cross-sectional view of an incinerator according to the second embodiment of the present invention. In FIG. 4, the same components as those of the structure shown in FIG.

Referring to FIG. 4, the incinerator 50 of the second embodiment has the same configuration as the incinerator 11 except that a sensor 51 is further provided in the configuration of the incinerator 11 of the first embodiment. .
The sensor 51 is provided at a predetermined height of the incinerator main body 31. The sensor 51 is disposed inside the incinerator main body 31 and includes a detection unit 51A that detects the presence or absence of a predetermined amount (fixed amount) of the fire-extinguishing foam 44. The sensor 51 can detect whether or not a predetermined amount of the fire extinguishing foam 44 is accumulated in the incinerator main body 31.
The sensor 51 is electrically connected to the control device 26. The sensor 51 transmits a detection signal of the fire extinguishing foam 44 to the control device 26.
As the sensor 51, for example, a contact sensor, a non-contact sensor, or the like can be used.

Based on the detection signal transmitted from the sensor 51, the control device 26 adjusts the supply amount of the fire-extinguishing foam 44, stops the supply, and the like.
Specifically, when the sensor 51 detects the fire-extinguishing foam 44, the control device 26 stops the supply of the fire-extinguishing foam 44 by the fire-extinguishing foam supply source 37, and the sensor 51 detects the fire-extinguishing foam 44. When not, the fire extinguishing foam 44 is supplied from the fire extinguishing foam supply source 37 to the combustion chamber 41.

According to the incinerator 50 of the second embodiment, by having the sensor 51 electrically connected to the control device 26, the combustion chamber 41 always has a predetermined amount (a constant amount) during the extinguishing process of the incinerator 50. ) Fire extinguishing foam 44 can be present.
In addition, the incineration object 42 is covered with the fire extinguishing foam 44 to suppress the combustion reaction, and the liquid film around the gas constituting the fire extinguishing foam 44 is in contact with the incineration object 42 that gradually burns. In addition, it is possible to gradually cool the incinerated object with the liquid film after suppressing the boiling (impact boiling) of the liquid (suppressing the pressure increase in the incinerator body 31).
Thereby, at the time of loss of regular power supply, after suppressing the rapid pressure rise in the incinerator 11, the fire in the incinerator can be extinguished.

The fire extinguishing method for the incinerator according to the second embodiment is the first implementation described above, except that the sensor 51 is used to keep the fire extinguishing foam 44 in the combustion chamber 41 at a predetermined amount (a constant amount). It can be performed by a method similar to the extinguishing method of the incinerator.
According to the fire extinguishing method for an incinerator of the second embodiment, a certain amount of fire-extinguishing foam 44 can always be maintained in the combustion chamber 41.
Moreover, the fire extinguishing method of the incinerator of the second embodiment can obtain the same effect as the fire extinguishing method of the incinerator of the first embodiment.

In the second embodiment, the case where one sensor 51 is provided has been described as an example. For example, two sensors (sensors similar to the sensor 51 are provided at different positions in the height direction of the incinerator body 31. ) May be used as one sensor for upper limit management, and the other sensor disposed below may be used as a sensor for lower limit management.
In this case, when the lower limit management sensor no longer detects the fire-extinguishing foam 44, the supply of the fire-extinguishing foam 44 is started, and the upper limit management sensor no longer detects the fire-extinguishing foam 44. The supply of the fire-extinguishing foam 44 is stopped.

(Third embodiment)
FIG. 5 is a partial cross-sectional view of an incinerator according to the third embodiment of the present invention. In FIG. 5, the same components as those of the structure shown in FIG.

Referring to FIG. 5, the incinerator 55 of the third embodiment is replaced with the sensor 51 constituting the incinerator 50 of the second embodiment, except that it has a first temperature sensor 56. It is the same composition as.
The first temperature sensor 56 is provided at a predetermined height of the incinerator main body 31. The first temperature sensor 56 is disposed inside the incinerator body 31 and has a detection unit 56 </ b> A that detects the temperature of the combustion chamber 41.
The first temperature sensor 56 is electrically connected to the control device 26. The first temperature sensor 56 transmits a detection signal related to the temperature of the combustion chamber 41 to the control device 26.

Data relating to a predetermined temperature (hereinafter referred to as “predetermined temperature T1”), which is a threshold for controlling the fire extinguishing foam supply source 37, is stored in the storage unit 26A constituting the control device 26.
When the temperature detected by the first temperature sensor 56 is higher than the predetermined temperature T1, the control device 26 supplies the fire-extinguishing foam 44 from the fire-extinguishing foam supply source 28, and the temperature detected by the first temperature sensor 56. When the temperature is equal to or lower than the predetermined temperature T1, the supply of the fire fighting foam 44 by the fire fighting foam supply source 28 is stopped.

  According to the incinerator 55 of the third embodiment, by providing the first temperature sensor 56 and the control device 26 configured as described above, a predetermined amount (a constant amount) of fire extinguishing foam is always provided in the combustion chamber 41. 44 can be maintained.

The extinguishing method for the incinerator of the third embodiment is the same as that described above except that the first temperature sensor 56 is used to keep the extinguishing foam 44 present in the combustion chamber 41 at a predetermined amount (a constant amount). It can carry out by the method similar to the fire extinguishing method of the incinerator of 1 embodiment.
Thus, when the temperature of the combustion exhaust gas in the combustion chamber 41 becomes equal to or lower than the predetermined temperature T1, the cooling of the combustion exhaust gas is stopped, so that a predetermined amount (a constant amount) of the fire extinguishing bubbles 44 is always provided in the combustion chamber 41. The incineration object 42 is covered with the fire-extinguishing foam 42 to suppress the combustion reaction, and the liquid film around the gas constituting the fire-extinguishing foam 44 is in contact with the incineration object 42 that gradually burns. Therefore, it is possible to gradually cool the incinerated object with the liquid film after suppressing the boiling (sudden boiling) of the liquid (suppressing the pressure rise in the incinerator body 31).
Thereby, at the time of loss of regular power supply, after suppressing the rapid pressure rise in the incinerator 11, the fire in the incinerator can be extinguished.

  Note that the incinerator extinguishing method of the third embodiment can obtain the same effects as the incinerator extinguishing method of the first embodiment.

  In the third embodiment, the case where only one first temperature sensor 56 is provided has been described as an example. However, a plurality of first temperature sensors 56 are arranged at the same height, and a plurality of first temperature sensors 56 are disposed. The fire extinguishing foam supply source 28 may be controlled by the control device 26 based on the average temperature of the detected temperatures of 56 and the predetermined temperature T1.

(Fourth embodiment)
FIG. 6 is a diagram showing a schematic configuration of the incineration facility according to the fourth embodiment of the present invention. In FIG. 6, the same components as those in the structure shown in FIG.

Referring to FIG. 4, the incineration facility 60 of the fourth embodiment is the same as the incineration facility 10 except that a second temperature sensor 61 is further provided in the configuration of the incineration facility 10 of the first embodiment. It is a configuration.
The second temperature sensor 61 is provided in the duct 19 located in the vicinity of the inlet of the dust collection unit 21. The second temperature sensor 61 is electrically connected to the control device 26.
The second temperature sensor 61 detects the temperature of the combustion exhaust gas flowing in the previous stage of the dust collection unit 21 and transmits a detection signal related to the detected temperature to the control unit 26.

Data relating to a predetermined temperature (hereinafter referred to as “predetermined temperature T2”) that is a threshold for controlling the fire extinguishing foam supply source 37 is stored in the storage unit 26A constituting the control device 26.
For example, the predetermined temperature T2 may be set to a temperature lower than an allowable temperature (for example, a fireproof temperature) of the filter 21B of the dust collecting unit 21.
When the temperature detected by the second temperature sensor 61 is equal to or higher than the predetermined temperature T2, the control device 26 supplies the fire-extinguishing foam 44 from the fire-extinguishing foam supply source 28, and the temperature detected by the second temperature sensor 61. When the temperature is lower than the predetermined temperature T2, the supply of the fire fighting foam 44 by the fire fighting foam supply source 28 is stopped.

  According to the incinerator 60 of the fourth embodiment, the combustion exhaust gas exceeding the allowable temperature of the filter 21 </ b> B is introduced into the dust collecting unit 21 by including the second temperature sensor 61 configured as described above. Since this can be suppressed, it is possible to suppress the filter 21B from being damaged by the heat of the combustion exhaust gas.

The extinguishing method for the incinerator of the fourth embodiment will be described first except that the extinguishing foam 44 is supplied to the combustion chamber 41 so that the temperature detected by the second temperature sensor 61 is less than the predetermined temperature T2. It can carry out by the method similar to the fire extinguishing method of the incinerator of 1st Embodiment.
Note that the incinerator extinguishing method of the fourth embodiment can obtain the same effects as the incinerator extinguishing method of the fourth embodiment.

  Note that the second temperature sensor 61 described above may be provided in the duct 19 located in the vicinity of the outlet of the cooling tower 15. In this case, the fire-extinguishing foam 44 can be supplied to the combustion chamber 41 at an early stage.

Moreover, you may provide the sensor 51 shown in FIG. 4 in the incinerator 60 of 4th Embodiment. In this case, in the fire extinguishing process, priority may be given to the temperature of the combustion exhaust gas detected by the second temperature sensor 61 over the detection of the sensor 51, and the supply of the fire fighting foam 44 may be controlled.
In addition, when the temperature detected by the second temperature sensor 61 is lower than the predetermined temperature T2, control is performed to supply the fire extinguishing foam 44 to the combustion chamber 41 when the sensor 51 no longer detects the fire extinguishing foam 44. May be.
Furthermore, the fire-extinguishing foam 44 may be supplied to the combustion chamber 41 when the temperature detected by the second temperature sensor 61 is equal to or higher than the predetermined temperature T2 and the sensor 51 no longer detects the fire-extinguishing foam 44.

Moreover, you may provide the 1st temperature sensor 56 shown in FIG. 5 in the incinerator 60 of 4th Embodiment. In this case, in the fire extinguishing process, the temperature of the combustion exhaust gas detected by the second temperature sensor 61 is prioritized over the temperature of the combustion chamber 41 detected by the first temperature sensor 56, and the supply of the fire extinguishing foam 44 is controlled. Also good.
Further, when the temperature detected by the second temperature sensor 61 is lower than the predetermined temperature T2, the fire extinguishing foam 44 is supplied to the combustion chamber 41 when the first temperature sensor 56 detects a temperature equal to or higher than the predetermined temperature T1. You may control to.
Further, when the temperature detected by the first temperature sensor 56 exceeds the predetermined temperature T1 and the temperature detected by the second temperature sensor 61 exceeds the predetermined temperature T2, the fire-extinguishing foam 44 is supplied to the combustion chamber 41. Also good.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  DESCRIPTION OF SYMBOLS 10 ... Incineration equipment, 11, 50, 55 ... Incinerator, 14, 19 ... Duct, 15 ... Cooling tower, 17 ... Pump, 21 ... Dust collection part, 21A ... Case, 21B ... Filter, 23 ... Blower, 25 ... Chimney, 26 ... control device, 26A ... storage unit, 26B ... control unit, 29 ... emergency power source, 31 ... incinerator main body, 32 ... combustion unit, 32A, 32B ... end, 32a ... top surface, 33 ... incinerator Supply port, 34 ... discharge port, 35 ... combustion exhaust gas discharge port, 36 ... fire extinguishing foam inlet, 37 ... fire extinguishing foam supply source, 38 ... fire extinguishing foam supply line, 41 ... combustion chamber, 42 ... incinerated material, 44 ... Fire extinguishing foam, 45 ... Fan, 46 ... Combustion air supply line, 51 ... Sensor, 51A, 56A ... Detecting unit, 56 ... First temperature sensor, 61 ... Second temperature sensor

Claims (13)

An incinerator body that defines a combustion chamber in which the incinerated material is burned,
In the combustion chamber, a fire-fighting foam supply source for supplying a fire-fighting foam that extinguishes the incinerated object to the incinerated object to be burned,
Incinerator characterized by including. A fire-fighting foam inlet provided in the incinerator body for introducing the fire-fighting foam into a combustion chamber;
An incinerator supply port that is provided in the incinerator main body and supplies the incinerated object to the combustion chamber from the outside of the combustion chamber;
With
The incinerator according to claim 1, wherein the fire-extinguishing foam introduction port is provided at a position higher than the incinerated material supply port. A sensor that is provided at a predetermined height inside the incinerator body and detects the presence or absence of a predetermined amount of the fire-extinguishing foam;
A controller electrically connected to the sensor and the fire-fighting foam source;
With
When the sensor detects the fire-extinguishing foam, the control device stops the supply of the fire-extinguishing foam by the fire-extinguishing foam supply source, and when the sensor does not detect the fire-extinguishing foam, The incinerator according to claim 1 or 2, wherein the foam for fire extinguishing is supplied from the foam supply source to the combustion chamber. A first temperature sensor that is provided at a predetermined height inside the incinerator body and detects the temperature of the combustion chamber;
A control device electrically connected to the first temperature sensor and the fire-fighting foam supply source;
With
When the temperature detected by the first temperature sensor is lower than a predetermined temperature set in advance, the control device stops the supply of the fire fighting foam by the fire fighting foam supply source, and the first temperature sensor 3. The incinerator according to claim 1, wherein the fire-extinguishing foam is supplied from the fire-extinguishing foam supply source to the combustion chamber when the temperature detected by the engine is higher than the predetermined temperature. An incinerator according to any one of claims 1 to 4,
A dust collecting unit including a filter disposed downstream of the incinerator and supplied with combustion exhaust gas generated in the combustion chamber;
A blower disposed behind the dust collection unit and leading the combustion exhaust gas to the dust collection unit;
Incineration facilities characterized by including. A second temperature sensor that is provided in a preceding stage of the dust collection unit, is electrically connected to the control device, and detects a temperature of the combustion exhaust gas introduced into the dust collection unit;
The control device supplies the fire-extinguishing foam from the fire-extinguishing foam supply source to the combustion chamber when the temperature of the combustion exhaust gas detected by the second temperature sensor becomes equal to or higher than a predetermined temperature. The incineration facility according to claim 5.   The incineration facility according to claim 5 or 6, further comprising an emergency power source that drives the fire-fighting foam supply source, the control device, and the blower when a normal power source is lost.   The cooling tower is connected to the incinerator and the dust collection unit, and includes a cooling tower that cools the combustion exhaust gas before the combustion exhaust gas supplied from the combustion chamber is supplied to the dust collection unit. The incineration facility according to any one of claims 5 to 7. A method for extinguishing an incinerator when a regular power supply is lost,
In a combustion chamber defined by an incinerator body constituting the incinerator, including a fire extinguishing step of supplying fire extinguishing foam for extinguishing the incinerated material so as to cover at least the incinerated material to be burned,
In the fire extinguishing step, the supply of the fire extinguishing foam is controlled based on the temperature of the combustion chamber or the height of the fire extinguishing foam in the combustion chamber.   The fire extinguishing method according to claim 9, wherein in the fire extinguishing step, the fire extinguishing foam is supplied so as to cover an inner surface of the incinerator main body.   The fire extinguishing step is characterized in that the pressure in the incinerator main body is set to a negative pressure by driving a blower provided at the rear stage of the dust collecting unit disposed at the rear stage of the incinerator with an emergency power source. The method for extinguishing an incinerator according to claim 9 or 10.   In the fire extinguishing step, the supply of the fire-extinguishing foam is controlled such that the temperature of the combustion exhaust gas introduced into the dust collecting unit is lower than an allowable temperature of a filter constituting the dust collecting unit. The method for extinguishing an incinerator according to claim 11.   In the fire extinguishing step, the combustion exhaust gas introduced into the dust collecting section by supplying the fire extinguishing foam and cooling the combustion exhaust gas led out from the combustion chamber by a cooling tower using the emergency power source. The fire extinguishing method for an incinerator according to claim 11 or 12, wherein the cooling of the combustion exhaust gas is stopped when the temperature of the fuel becomes less than a predetermined temperature.

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