JP2006071231A - Waste drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste drying device capable of effectively drying and treating wastes before disposal while preventing problems caused by disposing the wastes containing water such as shells. <P>SOLUTION: This waste drying device 13 utilizing gas turbine equipment wherein an exhaust port or an exhaust passage of a gas turbine is formed by a double-walled casing member, and an air duct 104 for introducing the outside air is defined between an inner wall and an outer wall of the double wall, is composed of a bleed air passage 14 communicated with the air duct 104, a drying chamber 15 connected with the bleed air passage 14 and storing the wastes, the exhaust passage 16 for discharging a gas introduced into the drying chamber through the bleed air passage, and an air blower 17 mounted in the exhaust passage, and sucking and delivering the air in the drying chamber. A combustion gas discharged from the gas turbine may be utilized, or a combustion gas discharged from a furnace of a boiler for burning coal or the like may be utilized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an apparatus that is effective for drying wastes such as shells attached to water intakes of thermal power plants and the like.

  In thermal power plants, seawater used as cooling water for condensers of power generation facilities is introduced through the intake channel, but raw mussels such as mussels are attached to this intake port. When it grows and accumulates, the actual opening area of the water intake becomes narrow, and there is a disadvantage that the amount of water intake decreases. For this reason, it is necessary to remove the shellfish adhering to the water intake, and the removed shellfish needs to be discarded as so-called industrial waste (for example, see Patent Document 1).

JP 2002-253112 A

  When the removed shell is crushed in a state containing moisture, it rots and generates odor. Therefore, drying prevents the rot from progressing, improves the crushedness of the shell, and reduces power costs.

  Therefore, in the present invention, it is possible to avoid the above-mentioned inconvenience due to disposal of waste such as shells containing water, and to effectively dry and dispose of such waste before disposal. The main problem is to provide a waste drying device.

  In order to achieve the above object, a waste drying apparatus according to the present invention is configured such that an exhaust passage provided on an exhaust portion of a gas turbine or a downstream side of the gas turbine is formed by a double wall casing member. An apparatus using a gas turbine facility in which an air flow path for introducing outside air is defined between an inner wall and an outer wall of the gas, and is connected to the bleed air passage and discarded A drying chamber that can store an object, a discharge passage that discharges gas introduced into the drying chamber through the extraction passage, and a blower that is provided in the discharge passage and sucks and sends out air in the drying chamber. (Claim 1).

  Accordingly, since the gas turbine is configured to burn fuel using pressurized air and rotate using the high-temperature and high-pressure gas, the gas turbine is provided at the exhaust portion of the gas turbine or downstream of the gas turbine. Between the inner wall and the outer wall of the casing member forming the exhaust passage formed, high-temperature air due to heat transfer from the high-temperature and high-pressure combustion gas exists, and this passes through the extraction passage to the drying chamber that can accommodate waste Then, it is discharged from the discharge passage through the blower. For this reason, since the waste contained in the drying chamber is dried after the moisture is removed by the supplied high-temperature air, waste can be prevented from being spoiled and the processing power can be reduced.

  In order to achieve the above object, a waste drying apparatus according to the present invention is an apparatus using gas turbine equipment, and can introduce combustion gas in an exhaust passage provided downstream of the gas turbine. A bleed passage, a drying chamber connected to the bleed passage and configured to accommodate waste, a discharge passage for discharging combustion gas introduced into the drying chamber through the bleed passage, and the discharge passage. And a blower that sucks and sends out the combustion gas in the drying chamber (claim 2).

  In such a configuration, the high-temperature and high-pressure combustion gas that flows through the exhaust passage provided downstream of the gas turbine is supplied to the drying chamber that can accommodate the waste through the extraction passage, and then through the blower. It is discharged from the discharge passage. For this reason, since the waste contained in the drying chamber is dried after the moisture is removed by the supplied high-temperature combustion gas, the waste can be prevented from being spoiled and the processing power can be reduced.

  In the above configuration, when the exhaust heat recovery device is provided on the downstream side of the gas turbine, the extraction passage may be provided on the upstream side of the exhaust heat recovery device and in a portion near the gas turbine of the exhaust passage. ).

  Further, an open / close valve may be provided in the extraction passage (claim 8). With such a configuration, it becomes possible to supply high-temperature air or combustion gas to the drying chamber via the extraction passage only when drying is necessary, and the thermal energy of the combustion gas can be used effectively. The on-off valve may be interlocked with the blower, may be manually operated, or may be automatically opened and closed.

  Further, the extraction passage may be connected to an existing exhaust duct connected to the air flow path. According to such a configuration, since it is not necessary to modify the main passage of the existing equipment, it is not necessary to greatly modify the power generation equipment, and the installation work of the waste drying device is facilitated.

The above configuration uses a gas turbine facility that uses LNG or the like as fuel, but uses a facility equipped with a boiler furnace that fuels fuel, such as oil-fired power or coal-fired power. May be built.
That is, a waste drying device that uses combustion gas discharged from a furnace of a boiler that burns fuel, an extraction passage that enables introduction of combustion gas in an exhaust passage provided on the downstream side of the furnace, and the extraction passage A drying chamber that is capable of accommodating waste, a discharge passage that discharges combustion gas introduced into the drying chamber via the extraction passage, and a combustion gas that is provided in the discharge passage and is provided in the drying chamber And a blower that sucks and sends out the air (claim 5).

  Therefore, in such a configuration, the combustion gas discharged from the furnace is supplied to the drying chamber that can accommodate the waste through the extraction passage, and then is discharged from the discharge passage through the blower. For this reason, since the waste contained in the drying chamber is dried after the moisture is removed by the supplied high-temperature combustion gas, the waste can be prevented from being spoiled and the processing power can be reduced.

  In particular, in such a configuration, in order to discharge clean combustion gas, it is preferable that the combustion gas can be introduced into the extraction passage from the downstream side of the desulfurization ventilator in the exhaust passage.

  Further, it is preferable that the extraction passage is connected to an upper portion of the exhaust passage in order to avoid introduction of dust accumulated in the lower portion of the exhaust passage.

  Furthermore, an open / close valve may be provided in the extraction passage so that high-temperature air or combustion gas can be supplied to the drying chamber via the extraction passage only when drying is necessary. Here, the on-off valve may be interlocked with the blower, may be manually operated, or may be automatically opened and closed.

  As described above, according to the first aspect of the present invention, air heated to high temperature by heat transfer of the high-temperature and high-pressure combustion gas used for rotating the gas turbine is supplied to the drying chamber through the extraction passage. Supplying and drying waste containing abundant water, such as shells attached to the intake, using this high-temperature air, so drying waste such as shells using existing equipment Is possible.

  According to the second aspect of the present invention, the high-temperature and high-pressure combustion gas used for rotating the gas turbine is supplied to the drying chamber via the extraction passage, and water is drawn using the high-temperature combustion gas. Since wastes containing abundant water such as shells attached to the mouth are dried, waste such as shells can be dried using existing equipment.

  According to the invention of claim 3, since the extraction passage is provided on the upstream side of the exhaust heat recovery device and near the gas turbine of the exhaust passage, it becomes possible to effectively use high-temperature air, It becomes possible to promote drying of waste.

  According to the invention according to claim 4, since the extraction passage is connected to the existing exhaust duct connected to the air flow path, when installing the waste drying device, it is not necessary to greatly modify the power generation equipment, In addition, the task of attaching the waste drying device is simplified.

  According to the fifth aspect of the present invention, the combustion gas generated by burning the fuel in the furnace of the boiler is supplied to the drying chamber through the extraction passage, and water such as a shell is abundant using the high-temperature combustion gas. Since the waste contained in is dried, waste such as shells can be dried using existing thermal power equipment.

    According to the sixth aspect of the present invention, since the combustion gas can be introduced into the extraction passage from the downstream side of the desulfurization ventilator in the exhaust passage, clean combustion gas can be used.

  According to the seventh aspect of the present invention, since the extraction passage is connected to the upper portion of the exhaust passage, it is possible to avoid the inconvenience that the soot and dust that are in the exhaust passage are introduced into the extraction passage.

  According to the eighth aspect of the present invention, an on-off valve is provided in the extraction passage, and it is possible to supply high-temperature air or combustion gas to the drying chamber only when waste needs to be dried. It is possible to dry the waste by effectively using.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show a configuration example in which the waste drying apparatus according to the present invention is applied to a power generation facility having a gas turbine, for example, a combined power generation facility using liquefied natural gas (LNG) as fuel.

  The combined power generation facility includes a compressor 1 that compresses air, a combustor 2 that combusts LNG in the air compressed by the compressor 1, and a turbine 3 that rotates with combustion gas combusted in the combustor 2. A gas turbine facility 4, a high-temperature exhaust gas used in the gas turbine facility 4 is introduced through an exhaust duct 10, and steam is generated by the exhaust gas, and the exhaust heat recovery device 2 A flue 6 attached to discharge the exhaust gas passing through the boiler to the atmosphere, a steam turbine 7 driven by steam generated by the exhaust heat recovery device 5, and condensate for condensing the steam used in the steam turbine 7. And a generator 9 driven by the rotation of the gas turbine 3 and the steam turbine 7.

  Therefore, by burning the fuel supplied to the combustor 2 in the air compressed by the compressor 1, high-temperature and high-pressure combustion gas is generated, and the gas turbine 3 is rotated by the combustion gas to generate the generator 9. Is rotated. Then, the high-temperature combustion gas discharged from the gas turbine 3 is sent to the exhaust heat recovery device 5 through the exhaust passage 10 and exchanges heat with the feed water supplied to the exhaust gas from the flue 6 as the low-temperature exhaust gas. To be released. Further, the feed water exchanged with the combustion gas by the exhaust heat recovery device 5 recovers the heat of the combustion gas to become steam, and the steam turbine 7 is rotated by this steam to rotate the generator 9. Then, the steam that has finished work in the steam turbine 7 is condensed by the condenser 8 and is supplied again to the exhaust heat recovery device 5 as water supply.

  Reference numeral 22 denotes a water intake passage for supplying seawater necessary for cooling and condensing the steam after driving the turbine in the condenser 8 from a water inlet 30. Reference numeral 23 denotes seawater supplied to the condenser 8. It is a water discharge channel for discharging water. Reference numeral 24 denotes a denitration device accommodated in the exhaust heat recovery device, which injects nitrogen oxide (NOx) in the exhaust gas discharged from the combustor 2 and the gas turbine 3 under the action of a catalyst into the injection nozzle 25. By reacting with ammonia injected from the above, it is decomposed into harmless nitrogen and water, and the combustion gas is made into clean exhaust gas. ,

  In such a power generation facility, the exhaust passage 3a of the gas turbine 3 or the exhaust passage 10 that guides the combustion gas discharged from the gas turbine 3 to the exhaust heat recovery device 5 is a double that includes an inner casing 101 and an outer casing 102. An air flow path 104 is formed between the inner casing 101 that forms the inner wall of the double wall and the outer casing 102 that forms the outer wall. ing. As a result, the combustion gas of the gas turbine 3 is guided to the exhaust heat recovery device 5 through the inside of the inner casing 101, and heat radiation to the outside is blocked by the outside air guided to the air flow path 104.

  The air flow path 104 is connected to an exhaust duct 12 that is equipped with an exhaust fan 11 that is continuously operated during operation of the power generation facility and that can exhaust high-temperature air (in the drawing, an exhaust section of the gas turbine 3). 3a). A waste drying device 13 is provided using the existing exhaust duct 12. The waste drying device 13 includes an extraction passage 14 connected to the exhaust duct 12 and leading to the air flow path 104, a drying chamber 15 connected to the extraction passage 14 and capable of containing waste, and the drying chamber 15. A discharge passage 16 that discharges air introduced through the extraction passage 14 and a blower 17 that is provided in the discharge passage 16 and sucks and sends out the air in the drying chamber 15. The bleed passage 14 is provided with an open / close valve 18 for opening and closing the passage.

  In order to operate the waste drying device 13, the opening / closing valve 18 is opened, the blower 17 is operated, and in order to stop the operation of the waste drying device 13, the blower 17 is stopped and then the opening / closing valve. 18 is closed. Further, when the blower 17 rotates, at least the blower 11 rotates, and high-temperature air is guided from the exhaust duct 12 to the extraction passage 14.

  As shown in FIG. 3, in the drying chamber 15, the extraction duct 14 a constituting the extraction passage 14 is connected to the lower portion of the drying chamber 15, and the discharge duct 16 a forming the discharge passage 16 is connected to the upper portion of the drying chamber 15. Thus, a cradle 21 that can be taken in and out via the opening / closing door 20 can be accommodated in the drying chamber 15. This cradle 15 is constructed by attaching a metal frame to a box-shaped frame, for example, with a good air permeability, and opening the upper part, and a waste α such as a shell (see FIG. 1). ) Can be placed.

  In the above-described configuration, when the waste α such as the shell is dried, the cradle 21 is pulled out from the drying chamber 5, placed on the cradle 21 to be dried and accommodated in the drying chamber 5, and waste The drying device 13 is activated. Then, high-temperature air is guided from the exhaust part 3 a of the gas turbine 3 through the exhaust duct 12 to the extraction duct 14 a and introduced into the lower part of the drying chamber 5. The introduced high-temperature air evaporates the moisture of the shell when passing around the shell, and is discharged to the outside air through the discharge duct 16a connected to the upper part of the drying chamber.

Therefore, it is possible to dry the shell by using the exhaust heat of the existing gas turbine 3, and it is possible to prevent the shell from being spoiled and improve the shell crushability. Further, since the bleed passage 14 is connected to the existing exhaust duct 12, it is not necessary to change the facility of the power generation system in order to attach the waste drying device, and the shell is dried during the operation of the gas turbine facility 4. It does not affect the efficiency of the power generation equipment.
Further, since the high-temperature air introduced into the extraction passage 14 is extraction from a portion near the gas turbine, it is possible to guide the high-temperature air and promote the drying of the shell.

  In the above-described configuration, the configuration example in which the waste drying device is adopted in the combined power generation system is shown. However, even if the similar waste drying device is applied to another power generation facility having a gas turbine, liquefied natural gas is used. Even if it is adopted in a gas turbine using kerosene or light oil instead of (LNG), the same action and effect can be obtained.

  In the above configuration, the outside air introduced into the double wall is heated by the combustion gas, and this outside air is introduced into the drying chamber through the extraction passage. However, the combustion gas itself is passed through the extraction passage. It is good also as a heat source which leads to a drying chamber through and dries. For example, as shown in FIG. 4, even if an extraction passage 14 is connected to an arbitrary portion of the exhaust passage 10 provided on the downstream side of the gas turbine 3 and the waste drying device 13 similar to the above configuration example is installed. Good. That is, the waste drying device 13 is connected to the exhaust passage 10 to allow the introduction of combustion gas in the exhaust passage, and the drying chamber 15 is connected to the extraction passage 14 and can accommodate waste. A discharge passage 16 for discharging the combustion gas introduced into the drying chamber 15 through the extraction passage 14, and a blower 17 provided in the discharge passage 16 for sucking and sending the combustion gas in the drying chamber 15. The bleed passage 14 is provided with an opening / closing valve 18 for opening / closing the passage, and when the waste drying device 13 is operated, the opening / closing valve 18 is opened to operate the blower 17 and the waste When the operation of the drying device 13 is stopped, the opening / closing valve 18 may be closed after the blower 17 is stopped.

  Since other configurations are the same as those in the above configuration example, the same portions are denoted by the same reference numerals and description thereof is omitted. In such a configuration, combustion gas is used instead of high-temperature air as a heat source, and the same effect can be obtained.

  In any of the above-described configuration examples, the operation of the on-off valve 18 and the blower 17 are performed manually. However, the on-off valve 18 and the blower 17 are interlocked so that the on-off valve 18 and the blower 17 move. It may be automated. For example, when the start switch (not shown) is turned on (ON), the opening / closing valve 18 is opened to start the blower 17 (ON), and when the start switch is disconnected (OFF), the blower 17 is stopped and the opening / closing valve 18 is closed. You may make it do.

  FIG. 5 shows a configuration example in which the waste drying apparatus 13 according to the present invention is applied to a coal-fired power generation facility in which coal is used as a main fuel and burned in a boiler furnace.

  This coal-fired power generation facility includes a boiler 31, a turbine 34 to which a superheater 32 and a reheater 33 arranged in the boiler 31 are connected, and a generator 35 connected to the turbine 34. The denitration device 37, the air preheater 38, the gas gas heater (for heat recovery) 39, and the electrostatic precipitator 40 provided in the exhaust passage (smoke) 36 on the downstream side of the furnace 50 The exhaust vent 41, the desulfurizer 42, the gas gas heater (for reheating) 43, and the desulfurizer vent 44 are discharged from the chimney 45 to the atmosphere.

  Coal is supplied to a bunker 46 from a coal silo (not shown) by a coal handling facility, and then pulverized into pulverized coal by a pulverized coal machine 47. The pulverized coal is supplied to the furnace 50 of the boiler 31 and burned in the furnace. Light oil is supplied to the boiler 31 by a light oil pump 51 from a tank (not shown).

  52 is a condenser, in which seawater necessary for cooling and condensing steam after driving the turbine is supplied from a water intake 53 through a water intake 54, and the supplied seawater is discharged through a water discharge 55. Like to do. In addition, industrial water is stored in the industrial water tank 56, the dissolved solid content is removed by the makeup water treatment device 57, and supplied to the condenser 52 as makeup water made of pure water.

  The pure water sent to the condenser 52 is boosted by the feed pump 58 and sent to the boiler 31. The pure water sent to the boiler 31 is heated by the combustion heat of the furnace 50 of the boiler 31 by the superheater 32, thereby being converted into high-temperature and high-pressure steam, supplied to the high-pressure turbine 34a, and rotating the high-pressure turbine 34a. Let Then, it is sent to the reheater 33 of the boiler 31 and heated again, and the intermediate pressure turbine 34 b and the low pressure turbine 34 c are rotated and returned to the condenser 52.

  Air necessary for boiler combustion is forcibly introduced by a forced air blower (FDF) 60 and preheated using the heat of the combustion gas by an air preheater (AH) 38 during the introduction process, resulting in heat loss of the combustion gas. Is increased to increase boiler efficiency, and the temperature of combustion air is increased to increase combustion efficiency.

  A denitration device 37 disposed on the exhaust passage 36 sprays ammonia to the combustion gas and decomposes nitrogen oxides contained in the combustion gas by the action of a catalyst. The combustion gas is cooled by exchanging heat with the combustion air by an air preheater (AH) 38, recovered by the gas gas heater 39, and then sent to the electric dust collector 40.

  In the electric dust collector (EP) 40, a discharge electrode and a dust collecting electrode are arranged opposite to each other in the exhaust passage 36, and a voltage is applied between both electrodes to collect dust (coal ash) contained in the combustion gas. The electrode is electrically adsorbed to the electrode, and the electroadsorbed coal ash is recovered by a fly ash recovery device 61 connected to this device.

  The combustion gas that has passed through the electric dust collector (EP) 40 is guided to the desulfurization device 42 via the induction fan 41. The desulfurization device 42 sprays a mixed liquid of limestone and water on the combustion gas, thereby absorbing the sulfur oxide contained in the combustion gas into the mixed liquid to generate a desulfurized gypsum slurry, and dehydrating the desulfurized gypsum slurry. By processing, desulfurized gypsum is produced | generated, and the produced | generated desulfurized gypsum is collect | recovered with the desulfurization gypsum collection | recovery apparatus 62 connected to this apparatus.

  The induction ventilator 41 cooperates with the pusher ventilator 60 at the inlet of the boiler and efficiently introduces combustion air into the boiler while holding the inside of the boiler at a negative pressure to prevent scattering of dust in the boiler. It is unique to coal-fired power generation facilities.

  The air from which the sulfur oxide has been removed by the desulfurization device 42 is heated by the gas gas heater 43 and guided to the chimney 45 via the desulfurization ventilator 44. The gas gas heater 44 effectively discharges the combustion gas from the chimney by using the chimney effect by heating the temperature of the combustion gas lowered by the desulfurization device 42. Further, the desulfurization ventilator 44 is provided at the desulfurization outlet in order to compensate for the pressure loss accompanying the passage of gas in the desulfurization apparatus, and prevents the gas from staying.

The waste drying apparatus 13 according to the present invention uses the combustion gas between the desulfurization ventilator 44 and the chimney 45 of such a thermal power generation facility, and has the same configuration as the above configuration example, The extraction passage 14 connected to the exhaust passage 36 between the desulfurization ventilator 44 and the chimney 45, the drying chamber 15 connected to the extraction passage 14 and capable of accommodating waste, A discharge passage 16 that discharges air introduced through the extraction passage 14 and a blower 17 that is provided in the discharge passage 16 and sucks and sends out the air in the drying chamber 15 are configured. The passage 14 is provided with an opening / closing valve 18 for opening and closing the passage.
Here, since dust may accumulate in the lower portion of the exhaust passage 36 due to the operation over a long period of time, the portion to which the extraction passage 14 is connected is preferably the upper portion of the exhaust passage 36.

  The specific configuration of the waste drying device 13 is the same as that of the configuration example of FIG. Further, even if the operation of the on-off valve 18 and the blower 17 are manually performed as in the above configuration example, the on-off valve 18 and the blower 17 are interlocked to automate the movement of the on-off valve 18 and the blower 17. May be.

  In such a configuration, in order to dry the waste α such as the shell, when the shell or the like to be dried is accommodated in the drying chamber 5 and the waste drying device 13 is operated, the exhaust passage from the furnace 50 of the boiler 31 is performed. The high-temperature combustion gas discharged through 36 is purified by a denitration device 37, an electric dust collector 40, and a desulfurization device 42 disposed on the exhaust passage, and then introduced into the drying chamber 15 through the extraction passage 14. Then, after water such as shells is evaporated, it is discharged to the outside air through the discharge passage 16.

  Therefore, it becomes possible to dry the shell by using the combustion gas of the existing boiler 31, and it is possible to prevent the shell from being rotted and to improve the crushedness of the shell. Further, since the combustion gas introduced into the extraction passage 14 is a clean gas from which nitrogen oxides and sulfur oxides are removed, there is no concern about environmental pollution.

  In the above-described configuration, the configuration example applied to the coal-fired power generation facility using coal as fuel is shown. However, the oil-fired power generation facility is substantially the same configuration except that the induction fan 41 is not provided. Therefore, it can be applied in the same manner, and the same action and effect can be obtained.

  In any of the above-described configurations, the shell is taken as an example of waste. However, it is needless to say that the present invention can be applied to drying other waste containing water, for example, when seaweed or jellyfish is dried. Can also be used.

FIG. 1 is a diagram showing a configuration example in which the waste drying apparatus according to the present invention is applied to a combined power generation facility. FIG. 2 is a diagram showing equipment around the gas turbine of the power generation equipment of FIG. FIG. 3 is a diagram showing a configuration of a drying chamber used in the waste drying apparatus, FIG. 3 (a) is a perspective view seen from the connection side of the extraction passage, and FIG. 3 (b) is a connection of the discharge passage. It is the perspective view seen from the side. FIG. 4 is a diagram showing another configuration example in which the waste drying apparatus according to the present invention is applied to a combined power generation facility. FIG. 5 is a diagram showing a configuration example in which the waste drying apparatus according to the present invention is applied to a coal-fired power generation facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Gas turbine 3a Exhaust part 5 Exhaust heat recovery apparatus 10 Exhaust passage 12 Exhaust duct 14 Extraction passage 15 Drying chamber 16 Exhaust passage 17 Blower 18 On-off valve 31 Boiler 36 Exhaust passage 44 Desulfurization ventilator 50 Furnace 101 Internal casing 102 External casing 104 Air Flow path

Claims (8)

An exhaust passage provided in the exhaust section of the gas turbine or downstream of the gas turbine is formed by a double wall casing member, and an air flow path for introducing outside air is defined between the inner wall and the outer wall of the double wall. In the waste drying equipment using the gas turbine equipment
An extraction passage leading to the air flow path;
A drying chamber connected to the extraction passage and capable of accommodating waste;
A discharge passage for discharging air introduced into the drying chamber through the extraction passage;
A waste drying apparatus comprising: a blower provided in the discharge passage for sucking and sending out air in the drying chamber. In waste drying equipment using gas turbine equipment,
An extraction passage capable of introducing combustion gas in an exhaust passage provided on the downstream side of the gas turbine;
A drying chamber connected to the extraction passage and capable of accommodating waste;
A discharge passage for discharging the combustion gas introduced into the drying chamber through the extraction passage;
A waste drying apparatus comprising: a blower provided in the discharge passage for sucking and sending the combustion gas in the drying chamber. An exhaust heat recovery device is provided on the downstream side of the gas turbine via the exhaust passage, and the extraction passage is provided on a portion of the exhaust passage closer to the gas turbine on the upstream side of the exhaust heat recovery device. The waste drying apparatus according to claim 1 or 2, characterized by the above. 2. The waste drying apparatus according to claim 1, wherein the extraction passage is connected to an existing exhaust duct connected to the air flow path. In a waste drying apparatus that uses combustion gas discharged from a furnace of a boiler that burns fuel,
An extraction passage capable of introducing combustion gas in an exhaust passage provided downstream of the furnace;
A drying chamber connected to the extraction passage and capable of accommodating waste;
A discharge passage for discharging the combustion gas introduced into the drying chamber through the extraction passage;
A waste drying apparatus comprising: a blower provided in the discharge passage for sucking and sending the combustion gas in the drying chamber. The waste drying apparatus according to claim 5, wherein the combustion gas can be introduced into the extraction passage from a downstream side of the desulfurization ventilator in the exhaust passage. 6. The waste drying apparatus according to claim 5, wherein the extraction passage is connected to an upper portion of the exhaust passage. 6. The waste drying apparatus according to claim 1, wherein an opening / closing valve is provided in the extraction passage.

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