JP2011240295A - Waste crushing facility equipped with fire prevention apparatus, and its operation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make little the damage of a transport apparatus by enhancing the reliability of a fire prevention system of a waster crushing facility, and enabling discharge of crushed materials at fire outbreak out of the transport apparatus, and further make the restoration of the transport apparatus after the operation of the fire prevention system to be easily and rapidly carried out.SOLUTION: In the waste crushing facility comprising a waste feed apparatus, a crushing machine, the crushed material transport apparatus, the fire prevention apparatus, and a control apparatus, the fire prevention apparatus is formed of a plurality of water spray nozzles installed in a casing of the crushed material transport apparatus, a water spray control valve to control feed water to the water spray nozzles, and a plurality of CO detectors to detect the CO concentration of the inner atmosphere installed in the casing of the crushed material transport apparatus; and the crushed materials are water sprayed to extinguish the fire by automatically stopping the crushing machine and operating the fire prevention apparatus by fire detection signals from the CO detectors.

Description

  The present invention relates to an improvement in a fire prevention system for a waste crushing facility for treating municipal waste and industrial waste, and it is possible to quickly and reliably generate a fire inside a transfer device outside a crusher constituting the crushing facility. A waste crushing facility equipped with a fire prevention device that improves the reliability of the fire prevention system by detecting and detecting fires in the water and suppressing the occurrence of damage during the operation of the fire prevention system and enabling quick restoration of the conveying device. It relates to the driving method.

In general, in order to treat municipal waste and industrial waste (hereinafter referred to as waste) by incineration, melting, gasification, etc., the waste is first crushed to a desired size in a crushing treatment facility, Processing to sort incombustibles, combustibles, etc. is performed.
Therefore, many wastes such as LP gas cylinders, acetylene gas cylinders, spray cans, organic solvent containers, gasoline containers, kerosene containers, etc. (hereinafter referred to as dangerous substances) are mixed in the waste. Although these hazardous materials are separated and removed at the waste collection stage, in reality, there are many dangerous materials in the waste that is brought into the waste treatment facility. Etc. are mixed.

  For this reason, in the waste treatment facility, the carried-in waste is sorted by visual inspection before being thrown into the crusher to remove dangerous substances. In addition, an explosion-proof device is provided in the crusher in case a dangerous material is thrown into the crusher main body due to an error, thereby preventing a fire or an explosion accident in the crusher.

  As the explosion-proof device for the crusher, the dilution air blowing method and the steam blowing method are generally used, and many temperature detectors, flame detectors, etc. are used for detecting abnormal situations such as fire and ignition. in use.

The dilution air suction method is to blow a large amount of air into the crusher to dilute the combustible gas concentration to below the lower limit of explosion and prevent explosion. An excellent explosion-proof property can be obtained in the atmosphere, but there is a problem that it is ineffective for a fire outside the ventilation atmosphere such as the inside of the transfer device.
In addition, the steam blowing method blows steam into the crusher to keep the oxygen concentration inside the crusher outside the explosive limit of the combustible gas, and suppresses the explosion. Similarly, there is a problem that there is no effect in a fire outside a steam atmosphere such as the inside of the transfer device.

On the other hand, the fire detector based on the detection of temperature and flame can detect the fire quickly and accurately if it is a fire in a narrow space such as the inside of the crusher.
However, because the crushed waste is transported at a high speed of 0.3 to 0.8 m / sec inside the transport device, the fire occurrence point will immediately pass through the detector installation part, There is a problem that a temperature detection type detector cannot detect a fire.

  In addition, in this type of transport device, the transported object is transported in a piled-up state, so the fire type is often buried, and under such a state, it is said that the detection of fire becomes more difficult. There's a problem.

  Furthermore, because the inside of the transport device is in an atmosphere where there is always a large amount of dust generated by crushing waste, it is delayed in detecting the occurrence of flame with a detector such as a flame detection type, or a smoke type There is a problem that a false alarm occurs in a sensor.

  In addition, conventional detectors based on detection of temperature, flame, smoke, etc. generally have low detection sensitivity and cannot detect this unless the fire has progressed to a certain extent, and transported objects are transported at high speed. In combination with this, initial fire extinguishment at the time of so-called fire is difficult. As a result, there is a problem that damage in the transfer is likely to be serious, and it takes time to restore the transfer device after the fire is extinguished, and the crushing equipment cannot be re-operated within a short time.

Japanese Patent Laid-Open No. 7-80334 JP 7-256129 A JP 2005-13770 A

  The present invention relates to the above-described problem in a waste crushing facility equipped with a conventional fire prevention device, namely, a. Although the explosion-proof inside the crusher is ensured by blowing diluted air or water vapor, there is no disaster prevention effect for the conveying device outside the ventilating atmosphere or steam atmosphere. B. Cannot be effectively dealt with, b. Fire detectors that detect temperature, flame, smoke, etc. are applicable because of the high dust atmosphere inside the transfer device, the high transfer speed of the transfer object, and the fact that the fire type tends to be buried in the transfer object being transferred. Is difficult, and it is difficult to construct a stable and highly accurate automatic disaster prevention system for waste crushing equipment, c. In the case of disaster prevention equipment for waste crushing equipment, especially sprinkling fire extinguishing of the transport device, it is intended to solve problems such as requiring a lot of work and recovery time to restart the transport device. Yes, if a fire or the like occurs in the transport device, this can be detected quickly and reliably, and the alarm device and watering device can be activated, and the transport device can be quickly and easily restored after the disaster prevention device is activated. A waste crushing facility equipped with a fire prevention device and an operation method thereof are provided.

A problem in improving the fireproof performance of the waste crushing equipment, particularly the flameproof performance of the transporting device that transports the crushed material at high speed, lies in the rapid and reliable detection of a fire that has occurred on the transported material that moves at high speed.
Therefore, the inventor of the present application first investigated the mechanism of the fire generated in the crushed material based on the accident example of the fire occurrence in the actual operating machine for the past 20 years. When the heat (crushing heat) generated by collision friction between metals and metals reaches about 270 ° C or more and flammable materials (ignition materials) remain in the vicinity of the heated metal crushing material, the crushing material moves to fire. I found that there are many cases to do.

  In other words, it is well known that ignition of combustible materials generally leads to ignition through the process of heat storage → acceleration of oxidation → temperature increase → smoldering, and the ignition of crushed material during the transfer is similarly heated. It is assumed that the flammable substance existing in the vicinity of the crushed metal is ignited through the process of heat storage → acceleration of oxidation → temperature increase → smoldering.

  On the other hand, the applicant first investigated the cause of spontaneous ignition of solid fuel (solid fuel / RDF solidified from garbage, combustible waste, plastic waste, etc.) stored in the storage tank. It was found that iron powder such as magnetic tape contained in the heat generated by oxidation, and that smoldering due to spontaneous ignition of RDF can be detected early and with high accuracy by the CO detector. This is disclosed as Japanese Patent Application Laid-Open No. 2003-206010.

  The inventor of the present application pays attention to the similarity between the cause of spontaneous firing of the RDF and the initial form of firing, the cause of spontaneous firing of the crushed material in the transport device and the initial form of firing, and crushing using a CO detector In addition to the idea of detecting spontaneous ignition of an object, the detection test of spontaneous ignition of crushed material in a transport device using a CO detector was repeatedly performed.

  The present invention was created based on the result of the ignition detection test of the crushed material in the transfer device based on the above idea, and the device invention of claim 1 is a waste supply device, a crusher, and a crushed material transfer. In a waste crushing facility comprising a device, a fire prevention device, and a control device, the fire prevention device controls a plurality of watering nozzles provided in a casing of the crushed material conveying device, and water supplied to the watering nozzles. Water spray control valve and a plurality of CO detectors for detecting the CO concentration of the internal atmosphere provided in the casing of the crushed material transport device, and automatically stops the crusher by the fire detection signal from the CO detector The basic configuration of the present invention is that the fire prevention device is activated and the crushed material is sprinkled with fire.

  It is desirable that the crushed material conveyance device is formed by a combination of at least the first conveyance device and the second conveyance device, and that CO detectors are provided on the upstream side and the downstream side of the first conveyance device.

  In addition, it is desirable to provide a noren made of an elastic material in the vicinity of the downstream side of the CO detector provided on the upstream side of the first transport device to prevent the generated CO in the internal atmosphere from flowing out to the upstream side.

  The plurality of watering nozzles are divided into three systems for sprinkling water to the upstream part of the first transport device, the downstream part of the first transport device and the second transport device, and each system is passed through a watering control valve provided for each system. Water is supplied to the watering nozzle belonging to, and a watering control valve for controlling watering to the first transporting device is operated by transmitting a fire detection signal of a CO detector provided on the upstream side of the first transporting device. It is desirable to operate the watering control valve that controls watering to the second transporting device by transmitting a fire detection signal from a CO detector provided on the downstream side of the 1 transporting device. Further, in order to suppress the generation of CO (prevention of smoldering), it is effective to set the watering of the upstream watering nozzle of the first transporting device to a constant amount of water in a range that does not affect the moisture content of the transported object. .

  The first transfer device and the second transfer device are made to be a transfer device capable of normal / reverse rotation, and the first transfer device is arranged at the upstream end of the first transfer device and the upstream end of the second transfer device. It is desirable to provide an automatic damper that is opened when the second transport device is reversely rotated, and to discharge the crushed material on both reversely transported transport devices from the upstream end of each transport device to the outside of the transport device. .

  The method invention according to claim 6 is the waste crushing facility equipped with the fire protection device according to claim 1, by transmitting a fire detection signal from a CO detector provided in a crushed material transport device located immediately below the crusher. The basic configuration of the present invention is to transmit a fire alarm and / or fire water spray.

  In the method of claim 6, it is preferable that the waste supply device, the crusher, and the crushed material transport device are stopped by the control device when the fire detection signal is transmitted.

  The method invention of claim 8 is the waste crushing facility equipped with the fire protection device of claim 4, wherein the fire detection of the CO detector provided on the upstream side of the first transfer device provided immediately below the crusher When a signal is transmitted, a fire alarm is issued and water is sprayed from a watering nozzle on the upstream side of the first transport device. Further, a fire detection signal of a CO detector provided on the downstream side of the first transport device is automatically or The basic configuration of the invention is to manually fire the crushed material by spraying water from the watering nozzle on the downstream side of the first conveying device and the watering nozzle of the second conveying device.

  In the method invention of claim 9, it is desirable to stop the waste supply device, the crusher, and the crushed material transport device by the control device when the fire alarm signal is transmitted.

  The method invention according to claim 10 is the waste crushing facility equipped with the fire prevention device according to claim 5, from the CO detector provided on the upstream side of the first transfer device or the CO detector provided on the downstream side. By sending out a fire alarm signal, water is discharged from each sprinkling nozzle and the first and second transport devices are rotated in reverse to discharge the transported material out of the transport device. It is.

  In the method invention of claim 11, the automatic dampers provided at the upstream end portions of the two conveying devices are opened at the time of reverse rotation of the first conveying device and the second conveying device, so that the discharged material can be easily discharged out of the conveying device. It is desirable to do.

  In the present invention, since the fire generated in the transported object is detected using the CO detector, even if the fire type is embedded in the transported object, or the transported object is transferred at high speed. Even if it is done, it can be detected quickly and reliably.

  Moreover, as a structure which comprises a conveying apparatus at least by the combination of a 1st conveying apparatus and a 2nd conveying apparatus, divides a watering nozzle into a group, and selects the system of the watering nozzle which sprinkles according to the detection state of a fire suitably. Therefore, it is possible to limit the watering range of the transport device during the fire fighting operation, and early recovery after the fire fighting becomes possible.

  Furthermore, by making the first transport device and the second transport device reversible, the crushed material containing the fire type itself can be smoothly discharged to the outside of the device, and the residual on the transport device even after sprinkling fire extinguishing. The crushed material can be easily discharged out of the conveying device, so that the restoration time of the conveying device can be shortened and the number of restoration steps can be reduced.

It is composition explanatory drawing of the waste crushing equipment provided with the fire prevention apparatus which concerns on this invention. It is a side surface schematic diagram of a 1st conveying apparatus. FIG. 3 is a schematic cross-sectional view taken along the line II in FIG. 2.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating the configuration of a waste crushing facility according to the present invention. The waste crushing facility includes a waste supply device 1, a crusher 2, a first transport device 3, a second transport device 4, and a third transport device. 5, the main part is formed from the control device 6 and the fire prevention device 7 and the like. In addition, the base number of the conveying apparatus to install is selected suitably, and usually two or more conveying apparatuses are provided.

The crusher 2 is a known hammer-type or rotary blade-type crusher, crushing the waste A supplied by the waste supply device 1 to a size of a predetermined size or less, and discharging the crushed material B to the discharge chute It discharges | emits on the 1st conveying apparatus 3 via 2a.
The crusher 2 is provided with a known explosion-proof facility such as an air blowing type or a steam blowing type, but since the crushing machine 2 itself is known, the description thereof is omitted here.

  The first transfer device 3, the second transfer device 4, and the third transfer device 5 are known transfer devices including conveyors 3a, 4a, 5a and casings 3b, 4b, 5b, etc., and crushed material in the direction of the arrow during steady operation. Transport B. Each of the transfer devices 2, 3 and 4 is configured so that the rotation direction can be switched, and is appropriately driven in the reverse direction at the time of restoration work or repair work, and in combination with the operation of the dampers 3c and 3d, the crushed material B Are discharged into temporary storage tanks 6a and 6b provided outside the transfer devices 3 and 4.

Each said conveying apparatus 3, 4, and 5 is normally drive | operated at the speed | rate of 0.3-0.8 m / s, and conveys the crushed material B to the following processes, such as a magnetic separator.
Moreover, in this embodiment, although the waste crushing equipment is comprised by the combination of the crusher 1 and the three conveyance apparatuses 3, 4, and 5, the combination number and arrangement form of a conveyance apparatus can be changed arbitrarily. Of course, it is a thing.

  The control device 6 receives fire detection signals S from CO detectors 10a and 10b, which will be described later, and performs operation control of the crusher 1, the transport devices 3, 4, 5 and the dampers 3c and 3d. It controls the operation of the watering control valves 9a, 9b, 9c. Sa is an alarm signal, Sb is a crusher control signal, Sc is a transport device control signal, and Sd is a damper control signal.

The fire prevention device 7 is composed of a watering nozzle 8, watering control valves 9a, 9b, 9c, CO detectors 10a, 10b, and the like, and the watering nozzles 8 include three watering control valves 9a, 9b, It is divided into three watering systems through 9c.
That is, each sprinkling nozzle 8 is attached to the discharge chute 2a of the crusher and the casings 3b, 4b, 5b of the transfer devices 3, 4, 5 and the upstream side of the first transfer device 3 through the spray control valve 9a. Water spray nozzles 8a, water spray control valve 9b, water spray nozzle 8b group on the downstream side of first transport device 3, water spray control valve 9c, water spray nozzle 8c group of second transport device 4 through the water spray control valve 9c, respectively. Done.

  In addition, the amount of water sprayed from each watering nozzle 8 is appropriately selected according to the height of the casing, the width of the conveyor, the mounting interval of each watering nozzle, and the like. Moreover, in the embodiment of FIG. 1, although the watering system is made into 3 systems, of course, the number of systems can be changed according to the length and combination form of a conveying apparatus.

The CO detectors 10a and 10b are provided in the casing 3b on the upstream side and the downstream side of the first transport device 3, and continuously suck the atmosphere inside the casing 3b to measure the CO concentration.
In the present embodiment, when the CO concentration in the atmosphere inside the casing 3b exceeds 40 to 200 ppm, the fire detection signal S is transmitted, and the operation of the watering device is performed.

  Note that the CO concentration in the atmosphere inside the casing 3b during the steady operation of the first transfer device 3 is about 0 to 15 ppm, and when a fire is generated inside the crushed material B and a so-called off state occurs, the CO concentration is It has been proved by a preliminary test using an actual machine that it increases to 40 to 200 ppm. Therefore, in the present embodiment, the CO concentration of 40 ppm is set as the set value for the operation of the watering device. However, since the CO concentration value varies depending on the quality and quantity of the crushed material, it is needless to say that an appropriate setting adjustment of the CO concentration value is required for implementation.

FIG. 2 is a side view showing an arrangement state of the watering nozzle 8 and the CO detector 10 in the first transport device, and FIG. 3 is a cross-sectional view taken along the line II in FIG.
In FIG. 2, the crushed material B is conveyed in the direction of the arrow from the bottom to the top, the laminated thickness T of the crushed material B is about 0.1 m, the conveyance length is about 30 m, and the conveyance height is about 21 m.

Further, the height H of the casing 3b is about 1 m, the lateral width W _{1 is} 2.3 m, the mounting pitch L of the watering nozzle 8 is 2 m to 4 m, and the lateral width W of the laminated portion of the conveyor 3a is about 1 m.
2 and 3, 11 is a CO detector mounting seat, 12 is a watering nozzle mounting seat, 13 is a mount, 14 is a driving wheel, 15, 16, 17 are driven wheels, 18 is a roller, 19 is A conveyor belt 20 is a guide body.

Next, the operation of the waste crushing facility according to the present invention will be described.
Referring to FIG. 1, during steady operation, crushed material B is conveyed in the direction of the arrow at a speed of 0.3 to 0.8 m / sec by first, second, and third conveying devices 3, 4, and 5. .
In addition, the CO detectors 10a and 10b suck the atmosphere in the casing of the first transport device 3, continuously measure the CO concentration, and record the measured values.

  If a fire type is generated in the conveyed product B for some reason, and a fire occurs due to this, one or both of the CO detectors 10a and 10b are activated. The operation of the CO detector 10 is set to a CO concentration of 40 ppm. When the CO detector 10a is operated, the crusher 1 and the transport devices 3, 4, and 5 are stopped, the watering device is operated, and the inside of the cage Watering is performed. At the same time, necessary alarms are transmitted.

Most of the fires that cause fires are caused by high-temperature metal fragments discharged from the crusher 1, so that most of the fires are upstream of the first transport device 3. It occurs in.
In addition, the nolene 3e made of a flexible elastic material provided in the central portion of the first transport device 3 performs a sealing action in the casing 3b, and is caused by CO or fire caused by the fire type or crushed material B caused by this. The CO is prevented from escaping along the casing 3b to the outside downstream of the transport device. Thus, reliable CO detection can be performed.

  In general, the CO detector 10a provided on the upstream side of the first transfer device 3 senses that the CO concentration has reached a set value for the first time, issues an alarm, and fire alarm signal S from the CO detector 10a. Is transmitted, the crusher 1 and the transporting devices 3, 4, 5 are stopped via the control device 6. Similarly, the water sprinkling control valve 9a is opened and water is sprayed into the first transfer device 3 to extinguish a fire or the like.

  Further, when the water concentration control valve 9a is opened, the CO concentration in the casing does not decrease, and the water concentration control is performed when the CO concentration of the Co detector 10b provided on the downstream side of the first transfer device 3 exceeds the set value. Both the valve 9b or the water sprinkling control valves 9b and 9c are operated, and water sprinkling is performed.

  Even when watering is performed by opening the watering control valve 9a, when the CO detection concentration of the CO detector 10b provided on the downstream side of the first transport device 3 exceeds the set value, as described above. Without immediately opening the watering control valve 9b and / or the watering control valve 9c, first, the internal state of the first transfer device 3 is first visually confirmed, and then the watering control valve 9b and / or the watering control valve 9c is manually operated as necessary. Of course, it may be opened.

In the above embodiment, when the CO detector 10a or both CO detectors 10a, 10b detect a CO concentration exceeding the set value, the watering control valves 9a, 9b, 9c are appropriately opened to start watering and at the same time a crusher 1 and each of the transporting devices 3, 4, 5 are automatically stopped, but the first transporting device 3, the second transporting device 4, and the like are not stopped, but are rotated backward to temporarily transport the transported material B. By discharging into the storage tank 3g, the fire in the first transfer device 3 and the second transfer device 4 is reduced, and the fire is quickly extinguished by watering the crushed material temporary storage tank 3g. May be.
In addition, you may make it provide an appropriate time delay by the timer apparatus etc. between the start of watering by the action | operation of a CO detector, and the start of reverse rotation of each conveying apparatus.

  Further, at the time of reverse rotation of the respective conveying devices, the dampers 3c and 3d provided at the upstream ends of the respective conveying devices 3 and 4 are opened to facilitate the discharge of the crushed material B to the outside (dotted line positions in FIG. 1). It is desirable to automatically move to). In this case, as a matter of course, the dampers 3c and 3d are of the electric or fluid pressure type.

  By rotating the transport device in the reverse direction and discharging the crushed material B to the outside, not only the crushed material containing the fire type can be directly discharged to the outside of the transport device, but also the crushed material inside the transport device after fire extinguishing watering. (Conveyed object) Removal of B and cleaning of the inside of the conveying apparatus are extremely easy.

  The waste crushing equipment of the present invention can be applied to a crushing equipment for substances containing combustible substances other than waste, and the fireproofing device used in the present invention is a fireproofing of a transporting device such as solid fuel or chip material. It can also be applied to a device.

A Waste B Crushed material S Fire detection signal 1 Waste supply device 2 Crusher 2a Discharge chute 3 First transport device 3a Conveyor 3b Casing 3c and 3d Automatic damper 3e and 3f Noren 3g Temporary storage tank 4 Crushed material second transport Device 4a Conveyor
4b Casing 5 Third transport device 5a Conveyor 5b Casing 6 Control device Sa Alarm transmission signal Sb Crusher control signal Sc Transport device control signal Sd Damper control signal 7 Fire prevention device 8 Sprinkling nozzles 9a, 9b, 9c Sprinkling control valves 10a, 10b CO Detector 11 CO detector mounting seat 12 Sprinkling nozzle mounting seat 13 Base 14 Drive wheel 15 Drive wheel 16 Drive wheel 17 Drive wheel 18 Roller 19 Conveyor belt 20 Guide body

Claims (11)

  In a waste crushing facility provided with a waste supply device, a crusher, a crushed material transport device, a fire prevention device, and a control device, a plurality of the fire protection devices provided in a casing of the crushed material transport device The CO detector is formed from a water spray nozzle, a water control valve for controlling the water supplied to the water nozzle, and a plurality of CO detectors for detecting the CO concentration of the internal atmosphere provided in the casing of the crushed material transport device. Waste crushing equipment equipped with a fire prevention device configured to automatically stop the crusher and activate the fire prevention device to sprinkle the crushed water with a fire detection signal from the fire.   The fireproof device according to claim 1, wherein the crushed material transport device is formed by a combination of at least the first transport device and the second transport device, and CO detectors are provided on the upstream side and the downstream side of the first transport device. Waste crushing equipment equipped with   The waste crushing equipment provided with the fire prevention device according to claim 2, wherein a noren made of an elastic material is provided in the vicinity of the downstream side of the CO detector provided on the upstream side of the first conveying device.   A plurality of watering nozzles are divided into three systems for watering the upstream part of the first transport device, the downstream part of the first transport device and the second transport device, and each system is connected to each system through a watering control valve provided for each system. While supplying water to the watering nozzle to which it belongs, by sending out a fire detection signal of a CO detector provided upstream of the first transporting device, a watering control valve for controlling watering to the first transporting device is operated, The fire prevention device according to claim 2, wherein the water spray control valve for controlling water spray to the second transport device is operated by transmitting a fire detection signal of a CO detector provided on the downstream side of the transport device. Waste crushing equipment.   The first transport device and the second transport device are configured as transport devices capable of forward / reverse rotation, and the first transport device is disposed at an upstream end of the first transport device and an upstream end of the second transport device. And an automatic damper that is opened when the second transport device is reversely rotated, and the crushed material on both of the reverse transport devices is discharged from the upstream end of each transport device to the outside of the transport device. Waste crushing equipment equipped with the fire protection device described in 1.   In the waste crushing equipment equipped with the fire prevention device according to claim 1, a fire alarm is transmitted and / or watering is extinguished by transmitting a fire detection signal from a CO detector provided in a crushed material transport device located immediately below the crusher. The operation method of the waste crushing equipment provided with the fire prevention device which is configured to perform.   The operation method of the waste crushing equipment provided with the fire prevention device according to claim 6, wherein the control device stops the waste supply device, the crusher, and the crushed material transport device when the fire detection signal is transmitted.   In the waste crushing equipment equipped with the fire prevention device according to claim 4, first, a fire alarm is generated by transmitting a fire detection signal of a CO detector provided on the upstream side of the first transfer device provided immediately below the crusher. And watering from the watering nozzle on the upstream side of the first conveying device, and further, by sending a fire detection signal of the CO detector provided on the downstream side of the first conveying device, automatically or manually of the first conveying device. The operation method of the waste crushing equipment provided with the fire prevention apparatus which sprinkled water from the watering nozzle of the downstream side and the watering nozzle of the 2nd conveyance apparatus, and the structure which extinguishes a crushed material.   The operation method of the waste crushing equipment provided with the fire prevention device according to claim 8, wherein when the fire alarm signal is transmitted, the waste supply device, the crusher, and the crushed material transport device are stopped by the control device.   In the waste crushing equipment equipped with the fire prevention device according to claim 5, by sending a fire alarm signal from a CO detector provided on the upstream side of the first transfer device or a CO detector provided on the downstream side, A method of operating a waste crushing facility including a disaster prevention device configured to discharge water from each water spray nozzle and reversely rotate the first transport device and the second transport device to discharge the transported material to the outside of the transport device.   The automatic damper provided at the upstream end of each of the two conveying devices is opened during reverse rotation of the first conveying device and the second conveying device to facilitate discharge of the conveyed product outside the conveying device. A method for operating a waste crushing facility equipped with the described fire prevention device.

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