Incineration system and incineration method

Abstract

To provide an incineration system that restricts the temperature rise in an incinerator.SOLUTION: An incineration system comprises: a supercharger with a compressor and a turbine; a first heat exchanger 3 that raises the temperature of compressed gas compressed by the compressor with exhaust gas discharged from an incinerator 1 and supplies the compressed gas with the raised temperature to the turbine; a second heat exchanger 4 that raises the temperature of fluid with the compressed gas discharged from the turbine, supplies the fluid with the raised temperature to other systems while cooling the compressed gas discharged from the turbine with the fluid and supplies the cooled compressed gas to the incinerator; a third heat exchanger 5 that raises the temperature of the fluid with the exhaust gas and supplies the fluid with the raised temperature to the other systems; and a supply line that supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger. The supply line is a line connecting the second heat exchanger and the third heat exchanger in series and has a line supplying the fluid supplied from the other system to the second heat exchanger, and a line supplying the fluid supplied from the second heat exchanger to the third heat exchanger at a downstream side.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to an incineration system and an incineration method.

Background Art

[0002] In an incinerator such as a sewage sludge incinerator, part of the exhaust heat is recovered by passing the high-temperature exhaust gas discharged from the incinerator through a heat exchanger, then dust is separated and removed in a dust collector, and further, the exhaust gas is passed through a flue gas treatment tower for water washing to remove components such as SO X and HCl in the exhaust gas (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, in the incinerator as described above, it is common to operate while maintaining the temperature inside the furnace at a predetermined target temperature. This is because when the temperature inside the furnace exceeds the target temperature, for example, NO is easily generated during combustion, and also problems such as ash melting and adhering to the furnace wall and pipes occur. X Therefore, an object of the present invention is to provide an incineration system and an incineration method that suppress the temperature rise inside the incinerator.

[0005]

Means for Solving the Problems

[0006] ​To achieve the above object, the incineration system of the present invention includes a supercharger having a compressor and a turbine, a first heat exchanger that raises the temperature of the compressed gas compressed by the compressor with the exhaust gas discharged from the incinerator and supplies the heated compressed gas to the turbine, a second heat exchanger that raises the temperature of a fluid with the compressed gas discharged from the turbine, supplies the heated fluid to another system, cools the compressed gas discharged from the turbine with the fluid, and supplies the cooled compressed gas to the incinerator, a third heat exchanger that raises the temperature of the fluid with the exhaust gas and supplies the heated fluid to the other system, and a supply line that supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger. The supply line is a line connecting the second heat exchanger and the third heat exchanger in series, and includes a line that supplies the fluid supplied from the other system to the second heat exchanger and a line that supplies the fluid supplied from the second heat exchanger to the third heat exchanger on the downstream side of the second heat exchanger.

Advantages of the Invention

[0007] According to the incineration system and incineration method of the present invention, it is possible to suppress the temperature rise in the incinerator.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, such embodiment examples do not limit the technical scope of the present invention.

[0010] [First Embodiment] First, the incineration system 100 in the first embodiment will be described. FIG. 1 is a diagram for explaining a configuration example of the incineration system 100 in the first embodiment. Note that the arrangement positions and numbers of the following lines (pipes) and pumps are examples and are not limited thereto.

[0011] As shown in FIG. 1, the incineration system 100 includes, for example, an incinerator 1, an overfeeder 2, a fluid air preheater 3, an air cooler 4, a cooling tower 6, a dust collector 7, a flue gas treatment tower 8, and a chimney 9. Hereinafter, the fluid air preheater 3 will also be referred to as the first heat exchanger 3, and the air cooler 4 will also be referred to as the second heat exchanger 4.

[0012] The incinerator 1 is a fluidized incinerator for incinerating sludge. The incinerator 1 has a so-called fluidized bed 1a. Also, the above-mentioned sludge is also called a dewatered cake. Hereinafter, the incinerator 1 will be described as a fluidized incinerator.

[0013] Here, in recent years, due to the improvement in the capacity of sludge dehydrators, the water content of sludge has decreased compared to the past. Also, by drying the dewatered sludge to further reduce the water content of the sludge, the efficiency of sludge combustion in the incinerator 1 is further increased. Therefore, in the incinerator 1, as the water content of the sludge decreases, the combustion of the sludge tends to be actively carried out, and the temperature inside the furnace may become higher than the target temperature.

[0014] Therefore, in the incineration systems (incineration systems 100, 200, 300, 400, and 500) in each of the following embodiments, an air cooler 4 is provided on the outlet side of the supercharger 2 to lower the temperature of the combustion air supplied to the incinerator 1, thereby suppressing the temperature rise in the incinerator 1.

[0015] The supercharger 2 has a compressor 2a and a turbine 2b connected via a rotating shaft 2c. Specifically, the compressor 2a compresses the sucked air to generate compressed gas and supplies the generated compressed gas to the fluid air preheater 3. The turbine 2b rotates the rotating shaft 2c by utilizing the energy of the compressed gas heated through the fluid air preheater 3, and supplies the compressed gas after utilizing the energy to the incinerator 1.

[0016] Here, the compressor 2a is driven along with the rotation of the rotating shaft 2c by the turbine 2b to compress the sucked air to generate compressed gas and supply the generated compressed gas to the fluid air preheater 3.

[0017] The fluid air preheater 3 performs heat exchange between the exhaust gas discharged from the incinerator 1 and the compressed gas supplied from the compressor 2a via the line L11. Specifically, the fluid air preheater 3 uses the exhaust gas discharged from the incinerator 1 to raise the temperature of the compressed gas compressed by the compressor 2a and supplies the heated compressed gas to the turbine 2b via the line L12. The fluid air preheater 3 cools the exhaust gas discharged from the incinerator 1 and supplies the cooled exhaust gas to the cooling tower 6.

[0018] The air cooler 4 performs heat exchange between the compressed gas supplied from the turbine 2b via the line L31 and the fluid supplied from a fluid supply destination (not shown). Specifically, the air cooler 4 heats up the fluid by using the compressed gas supplied from the turbine 2b and supplies the heated fluid to the above-mentioned supply destination. Further, the air cooler 4 cools the compressed gas supplied from the turbine 2b and supplies the cooled compressed gas to the incinerator 1 via the line L32. When the cooled compressed gas is supplied to the fluidized bed 1a of the incinerator 1, this compressed gas flows through the fluidized bed 1a and is used as air for burning sludge. Further, the cooled compressed gas may be supplied to a so-called freeboard above the fluidized bed 1a. When the cooled compressed gas is supplied to the freeboard, this compressed gas is used as combustion air.

[0019] The cooling tower 6 is arranged downstream of the fluidized air preheater 3 and cools the exhaust gas supplied from the fluidized air preheater 3 by bringing it into contact with water sprayed from a water spray nozzle (not shown) provided inside the cooling tower 6. Then, the cooling tower 6 supplies the cooled exhaust gas to the dust collector 7.

[0020] The dust collector 7 is arranged downstream of the cooling tower 6 and removes impurities in the exhaust gas supplied from the cooling tower 6. Note that the dust collector 7 may be, for example, a ceramic dust collector with excellent heat resistance.

[0021] The flue gas treatment tower 8 is arranged downstream of the dust collector 7 and introduces exhaust gas from, for example, the lower part of the tower. Then, the flue gas treatment tower 8 removes components such as SO X and HCl in the exhaust gas by incorporating them into water by bringing the exhaust gas into contact with water sprayed from a water spray nozzle (not shown) at the upper part. Further, a chimney 9 for discharging the exhaust gas cleaned in the flue gas treatment tower 8 to the atmosphere is arranged at the upper part of the flue gas treatment tower 8.

[0022] The suction machine P1 is a fan or a blower that sucks the exhaust gas discharged from the incinerator 1 to the flue gas treatment tower 8 and sends the exhaust gas cleaned in the flue gas treatment tower 8 to the chimney 9.

[0023] As described above, in the incineration system 100 according to the first embodiment, an air cooler 4 is provided between the outlet side of the turbine 2b and the inlet side of the incinerator 1. Then, the compressed gas cooled in the air cooler 4 is supplied to the incinerator 1.

[0024] That is, the incineration system 100 according to the first embodiment includes a supercharger 2 having a compressor 2a and a turbine 2b connected via a rotating shaft 2c, a fluidized air preheater 3 that heats the compressed gas compressed by the compressor 2a with the exhaust gas discharged from the incinerator 1 and supplies the heated compressed gas to the turbine 2b, and an air cooler 4 that cools the compressed gas discharged from the turbine 2b with a fluid and supplies the cooled compressed gas to the incinerator 1.

[0025] In the incineration system 100 according to the first embodiment, instead of directly supplying the high-temperature compressed gas discharged from the turbine 2b to the incinerator 1, this high-temperature compressed gas is air-cooled, so that it is possible to suppress the temperature rise in the incinerator 1. Therefore, in the incineration system 100, it is possible to prevent the generation of NO X and the like from becoming likely. Further, in the incineration system 100, for example, it is possible to prevent damage to the refractory due to temperature rise and blockage of piping and the like due to adhesion of molten incineration ash.

[0026] [Second Embodiment] Next, the incineration system 200 according to the second embodiment will be described. FIG. 2 is a diagram for explaining a configuration example of the incineration system 200 according to the second embodiment. Hereinafter, the configuration different from the incineration system 100 described with reference to FIG. 1 will be described.

[0027] The incineration system 200 according to the second embodiment includes a power generation system 10 in addition to the incineration system 100 described with reference to FIG. 1.

[0028] The power generation system 10 has a function of recovering the thermal energy of the fluid circulating between it and the air cooler 4 and converting it into other forms of energy. For example, it forms a thermal cycle such as a Rankine cycle or a Kalina cycle that circulates a low-boiling medium such as a low-boiling refrigerant, alternative refrigerant, silicone oil, petroleum-based organic compound, ammonia, or a mixed fluid of ammonia and water as a working medium.

[0029] The air cooler 4 performs heat exchange between the compressed gas supplied from the turbine 2b via the line L31 and the fluid supplied from the power generation system 10 via the line L21. Specifically, the air cooler 4 uses the compressed gas supplied from the turbine 2b to raise the temperature of the fluid and supplies the heated fluid to the power generation system 10 via the line L22. Also, the air cooler 4 cools the compressed gas supplied from the turbine 2b and supplies the cooled compressed gas to the incinerator 1 via the line L32.

[0030] That is, in the incineration system 200 of the second embodiment, the thermal energy recovered in the air cooler 4 is supplied to the power generation system 10.

[0031] Thereby, the power generation system 10 can generate power by using the thermal energy recovered in the air cooler 4.

[0032] Note that the fluid flowing through the lines L21 and L22 may be, for example, heat medium oil, or may be other liquids or gases such as water (steam) or air.

[0033] Also, the fluid flowing through the lines L21 and L22 is circulated between the air cooler 4 and the power generation system 10 by a pump P2 which is a circulation pump.

[0034] [Third Embodiment] Next, the incineration system 300 in the third embodiment will be described. FIG. 3 is a diagram for explaining a configuration example of the incineration system 300 in the third embodiment. Hereinafter, configurations different from the incineration system 200 described with reference to FIG. 2 will be described.

[0035] In the incineration system 300 in the third embodiment, an air cooler 4 and a dryer 20 are connected via lines L21 and L22.

[0036] The dryer 20 dries, for example, sludge before being incinerated in the incinerator 1. Specifically, the dryer 20 dries the sludge by using, for example, the thermal energy recovered in the air cooler 4.

[0037] Thereby, the dryer 20 can dry the sludge by using, for example, the retained heat of the exhaust gas. That is, in the incineration system 300, by connecting the air cooler 4 to a device other than the power generation system 10, the retained heat of the exhaust gas can be used for purposes other than power generation.

[0038] [Fourth Embodiment] Next, the incineration system 400 in the fourth embodiment will be described. FIG. 4 is a diagram for explaining a configuration example of the incineration system 400 in the fourth embodiment. Hereinafter, configurations different from the incineration system 200 described with reference to FIG. 2 will be described.

[0039] As shown in FIG. 4, the incineration system 400 includes, for example, a heat medium heater 5 in addition to the incineration system 100 described with reference to FIG. 1. Hereinafter, the heat medium heater 5 is also referred to as a third heat exchanger 5.

[0040] The fluid air preheater 3 and the heat medium heater 5 are connected in a so-called parallel connection, and the exhaust gas discharged from the incinerator 1 is branched into two through a line. A part of the exhaust gas is supplied to the fluid air preheater 3, and the other part of the exhaust gas is supplied to the heat medium heater 5.

[0041] The fluid discharged from pump P2 (in other words, the fluid supplied from power generation system 10) is supplied to heat medium heater 5 via line L23, heated by heat medium heater 5, and then supplied to power generation system 10 via line L24 that merges into line L22. Also, the fluid discharged from pump P2 is supplied to air cooler 4 via line L21, heated by air cooler 4, and then supplied to power generation system 10 via line L22.

[0042] Heat medium heater 5 performs heat exchange between the exhaust gas discharged from incinerator 1 and the fluid supplied from power generation system 10 via line L23. Specifically, heat medium heater 5 uses the exhaust gas discharged from incinerator 1 to heat the fluid, and supplies the heated fluid to power generation system 10 via line L24. Also, heat medium heater 5 cools the exhaust gas discharged from incinerator 1 and supplies the cooled exhaust gas to cooling tower 6.

[0043] Note that the fluid flowing through line L23 and line L24 may be, for example, heat medium oil, similar to the fluid flowing through line L21 and line L22, or may be other liquids or gases such as water (steam) or air.

[0044] Also, as shown in FIG. 4, line L21 and line L23 may merge in the vicinity of power generation system 10, or may each consist of two independent lines. Similarly, as shown in FIG. 4, line L22 and line L24 may merge in the vicinity of power generation system 10, or may each consist of two independent lines.

[0045] That is, in incineration system 400 according to the fourth embodiment, each of the thermal energy recovered in air cooler 4 and the thermal energy recovered in heat medium heater 5 is supplied to power generation system 10.

[0046] As a result, the power generation system 10 can generate power by using the thermal energy recovered in the air cooler 4 and the thermal energy recovered in the heat medium heater 5. Therefore, the power generation system 10 can more efficiently generate power by utilizing the retained heat of the exhaust gas discharged from the incinerator 1.

[0047] In the example shown in FIG. 4, a line L21 and a line L22 through which a fluid circulates between the air cooler 4 and the power generation system 10, and a line L23 and a line L24 through which a fluid circulates between the heat medium heater 5 and the power generation system 10 are provided in parallel. That is, in the example shown in FIG. 4, a part of the fluid from the power generation system 10 is supplied to the air cooler 4 via the line L22, and another part is supplied to the heat medium heater 5 via the line L23.

[0048] As a result, in the incineration system 400, it becomes possible to use a circulation pump (pump P2) with a lower discharge pressure than in the case of the incineration system 500 described later. Also, in the incineration system 400, it becomes possible to reduce the heat transfer surface in the heat medium heater 5 compared to the case of the incineration system 500 described later.

[0049] Also, in the example shown in FIG. 4, a valve V1 is provided in the line between the fluidized air preheater 3 and the cooling tower 6, and a valve V2 is provided in the line between the heat medium heater 5 and the cooling tower 6. Further, in the example shown in FIG. 4, a valve V3 (valves V3a and V3b) is provided in the line L21 between the air cooler 4 and the power generation system 10.

[0050] As a result, in the incineration system 400, for example, by adjusting the flow rate by the valves V1, V2, and V3, it becomes possible to adjust the supply amount of thermal energy to the power generation system 10. Specifically, for example, when the temperature of the incinerator 1 exceeds the threshold value, the control device (not shown) increases the ratio of the fluid supplied to the air cooler 4 to recover more heat of the compressed gas from the turbine 2b, so the opening degree of the valve V3b is decreased and the opening degree of the valve V3a is increased. Also, when the temperature of the incinerator 1 becomes below the threshold value, the control device (not shown) increases the opening degree of the valve V3b and decreases the opening degree of the valve V3a.

[0051] Also, in the example shown in FIG. 4, the fluidized air preheater 3 and the heat medium heater 5 are arranged in parallel, but the fluidized air preheater 3 and the heat medium heater 5 may be arranged directly. Specifically, in the example shown in FIG. 4, a part of the exhaust gas discharged from the incinerator 1 is supplied to the fluidized air preheater 3 and the other part is supplied to the heat medium heater 5, but all of the exhaust gas discharged from the incinerator 1 may be supplied to the fluidized air preheater 3, and further, all of the exhaust gas that has passed through the fluidized air preheater 3 may be supplied to the heat medium heater 5. Also, all of the exhaust gas discharged from the incinerator 1 may be supplied to the heat medium heater 5, and further, all of the exhaust gas that has passed through the heat medium heater 5 may be supplied to the fluidized air preheater 3. Hereinafter, the verification results for the fourth embodiment will be described.

[0052] [Verification Results for the Fourth Embodiment] FIG. 5 is a diagram for explaining a configuration example of the incineration system 900 in the comparative example. Also, FIG. 6 is a diagram for explaining the verification results for the fourth embodiment and the comparative example.

[0053] First, a configuration example of the incineration system 900 in the comparative example will be described. The air cooler 4 in the incineration system 900 shown in FIG. 5 does not perform heat exchange between the compressed gas supplied from the turbine 2b and the fluid supplied from the power generation system 10, and releases the heat recovered from the compressed gas supplied from the turbine 2b to the outside. That is, the incineration system 900 shown in FIG. 5 is a configuration example when the heat recovered from the compressed gas supplied from the turbine 2b is not used for other purposes such as power generation, unlike the case described in FIG. 4.

[0054] Next, the verification results for the fourth embodiment and the comparative example will be described. The verification results shown in FIG. 6 indicate that in the incinerator 1 of the incineration system 900 (the incineration system 900 shown in FIG. 5) in the comparative example, when incinerating 300 (t / day) of dewatered cake, the reduction in power consumption by using the overfeed machine 2 is 270 (kW), and the power generation amount by the power generation system 10 is 1080 (kW).

[0055] Also, the verification results shown in FIG. 6 indicate that in the incinerator 1 of the incineration system 400 (the incineration system 400 shown in FIG. 4) in the fourth embodiment, when incinerating 300 (t / day) of dewatered cake, the reduction in power consumption by using the overfeed machine 2 is 270 (kW), and the power generation amount by the power generation system 10 is 1240 (kW).

[0056] That is, the verification results shown in FIG. 6 indicate that when performing power generation using the thermal energy recovered in the heat medium heater 5 and the thermal energy recovered in the air cooler 4, compared with the case of performing power generation using only the thermal energy recovered in the heat medium heater 5, the power generation amount by the power generation system 10 increased by 160 (kW). Therefore, the verification results shown in FIG. 6 indicate that the incineration system 400 in the fourth embodiment can more efficiently perform power generation using the retained heat of the exhaust gas discharged from the incinerator 1 than the incineration system 900 in the comparative example.

[0057] [Fifth Embodiment] Next, the incineration system 500 in the fifth embodiment will be described. FIG. 7 is a diagram for explaining a configuration example of the incineration system 500 in the fifth embodiment. Hereinafter, configurations different from the incineration system 400 described with reference to FIG. 4 will be described.

[0058] In the incineration system 500 in the fifth embodiment, different from the case described with reference to FIG. 4, lines L25, L26, and L27 are provided to connect the air cooler 4, the heat medium heater 5, and the power generation system 10 in series, instead of lines L21, L22, L23, and L24. That is, in the example shown in FIG. 7, after fluid is supplied from the power generation system 10 to the air cooler 4, fluid is supplied from the air cooler 4 to the heat medium heater 5. And in the example shown in FIG. 7, further, fluid is supplied from the heat medium heater 5 to the power generation system 10.

[0059] Thereby, in the incineration system 500, for example, it becomes possible to more easily control the temperature of the fluid supplied to the power generation system 10 than in the case of the incineration system 400 described with reference to FIG. 4.

[0060] Also, in the example shown in FIG. 7, a bypass L28 is provided to connect the front and rear of the position where the air cooler 4 is provided in lines L25 and L26.

[0061] Thereby, in the incineration system 500, for example, by adjusting the valve V4 (valves V4a and V4b) provided in the bypass L28, it becomes possible to adjust the amount of fluid supplied to the air cooler 4. Specifically, for example, when the temperature of the incinerator 1 exceeds a threshold value, the control device (not shown) lowers the opening degree of the valve V4a and raises the opening degree of the valve V4b in order to increase the heat energy recovered by the air cooler 4. On the other hand, for example, when the temperature of the incinerator 1 becomes lower than the threshold value, the control device (not shown) raises the opening degree of the valve V4a and lowers the opening degree of the valve V4b in order to decrease the heat energy recovered by the air cooler 4.

[0062] Also, in the example shown in FIG. 7, a bypass L29 is provided to connect the front and rear of the position where the heat medium heater 5 is provided at lines L26 and L27.

[0063] Thereby, in the incineration system 500, for example, by adjusting the valves V5 (valves 5a and V5b) provided in the bypass L29, it becomes possible to adjust the amount of fluid supplied to the heat medium heater 5. Specifically, control equipment (not shown) controls the opening and closing of the valves V5a and V5b so that the outlet temperature of the heat medium heater 5 becomes the target temperature.

[0064] Note that, at lines L31 and L32, for example, a bypass (not shown) may be provided to connect the front and rear of the position where the air cooler 4 is provided. Thereby, in the incineration system 500, it becomes possible to adjust the amount of compressed gas supplied to the incinerator 1.

Explanation of Reference Numerals

[0065] 1: Incinerator 1a: Fluidized bed 2: Over-feeder 2a: Compressor 2b: Turbine 2c: Rotating shaft 3: Fluidized air preheater 4: Air cooler 5: Heat medium heater 6: Cooling tower 7: Dust collector 8: Flue gas treatment tower 9: Chimney 10: Power generation system 20: Dryer 100: Incineration system 200: Incineration system 300: Incineration system 400: Incineration system 500: Incineration system P1: Induced draft fan P2: Pump L11: Line L12: Line L21: Line L23: Line L24: Line L25: Line L26: Line L27: Line L28: Bypass L29: Bypass L31: Line L32: Line V1: Valve V2: Valve V3: valve V4: valve V5: valve

Claims

1. A supercharger having a compressor and a turbine, a first heat exchanger that raises the temperature of the compressed gas compressed by the compressor with the exhaust gas discharged from the incinerator and supplies the heated compressed gas to the turbine, a second heat exchanger that raises the temperature of a fluid with the compressed gas discharged from the turbine, supplies the heated fluid to another system, cools the compressed gas discharged from the turbine with the fluid, and supplies the cooled compressed gas to the incinerator, a third heat exchanger that raises the temperature of the fluid with the exhaust gas and supplies the heated fluid to the other system, and a supply line that supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger, wherein the supply line is a line that connects the second heat exchanger and the third heat exchanger in series, and includes a line that supplies the fluid supplied from the other system to the second heat exchanger and a line that supplies the fluid supplied from the second heat exchanger to the third heat exchanger downstream of the second heat exchanger. An incineration system.

2. The incineration system according to claim 1, wherein the supply line includes a line that supplies at least a part of the fluid supplied from the other system to the third heat exchanger bypassing the second heat exchanger, and a line that supplies at least a part of the fluid supplied from the second heat exchanger to the other system bypassing the third heat exchanger.

3. An incinerator, a supercharger having a compressor and a turbine, a first heat exchanger that raises the temperature of the compressed gas compressed by the compressor with the exhaust gas discharged from the incinerator and supplies the heated compressed gas to the turbine, another system that operates by heat supplied through a fluid, a second heat exchanger that raises the temperature of the fluid with the compressed gas discharged from the turbine, supplies the heated fluid to the other system, cools the compressed gas discharged from the turbine with the fluid, and supplies the cooled compressed gas to the incinerator, a third heat exchanger that raises the temperature of the fluid with the exhaust gas and supplies the heated fluid to the other system, and a supply line that supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger. The supply line is a line that connects the second heat exchanger and the third heat exchanger in series, and includes a line that supplies the fluid supplied from the other system to the second heat exchanger, and a line that supplies the fluid supplied from the second heat exchanger to the third heat exchanger on the downstream side of the second heat exchanger. An incineration system.

4. The supply line includes a line that supplies at least a part of the fluid supplied from the other system to the third heat exchanger bypassing the second heat exchanger, and at least a part of the fluid supplied from the second heat exchanger. The incineration system according to claim 3, further comprising a line that supplies the fluid to the other system bypassing the third heat exchanger.

5. A supercharger having a compressor and a turbine; A first heat exchanger that raises the temperature of the compressed gas compressed by the compressor by at least a part of the exhaust gas discharged from the incinerator, and supplies the heated compressed gas to the turbine; A second heat exchanger that raises the temperature of the fluid by the compressed gas discharged from the turbine, supplies the heated fluid to another system, cools the compressed gas discharged from the turbine with the fluid, and supplies the cooled compressed gas to the incinerator; A third heat exchanger provided in parallel with the first heat exchanger, which raises the temperature of the fluid by another part different from the at least a part of the exhaust gas, and supplies the heated fluid to the other system; A supply line that supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger; The supply line is a line that connects the second heat exchanger and the third heat exchanger in parallel, and includes a line that supplies a part of the fluid supplied from the other system to the second heat exchanger, and a line that supplies another part of the fluid supplied from the other system to the third heat exchanger. The supply line is an incineration system in which at least one of the supply amount of the fluid supplied to the second heat exchanger and the supply amount of the fluid supplied to the third heat exchanger can be adjusted.

6. Furthermore, it has another supply line that supplies the exhaust gas to the first heat exchanger and the third heat exchanger. The incineration system according to claim 5, wherein the other supply line is capable of adjusting at least one of the supply amount of the exhaust gas supplied to the first heat exchanger and the supply amount of the exhaust gas supplied to the third heat exchanger.

7. The first heat exchanger raises the temperature of the compressed gas compressed by the compressor by the exhaust gas discharged from the incinerator, and supplies the heated compressed gas to the turbine. The second heat exchanger raises the temperature of the fluid by the compressed gas discharged from the turbine, supplies the heated fluid to another system, cools the compressed gas discharged from the turbine by the fluid, and supplies the cooled compressed gas to the incinerator. The third heat exchanger raises the temperature of the fluid by the exhaust gas, and supplies the heated fluid to the other system. The supply line supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger. The supply line is a line connecting the second heat exchanger and the third heat exchanger in series, supplies the fluid supplied from the other system to the second heat exchanger, and supplies the fluid supplied from the second heat exchanger to the third heat exchanger on the downstream side of the second heat exchanger. An incineration method.

8. The supply line supplies at least a part of the fluid supplied from the other system to the third heat exchanger bypassing the second heat exchanger, and supplies at least a part of the fluid supplied from the second heat exchanger to the other system bypassing the third heat exchanger. The incineration method according to claim 7.

9. The first heat exchanger raises the temperature of the compressed gas compressed by the compressor by at least a part of the exhaust gas discharged from the incinerator, and supplies the heated compressed gas to the turbine. The second heat exchanger raises the temperature of the fluid by the compressed gas discharged from the turbine, supplies the heated fluid to another system, cools the compressed gas discharged from the turbine by the fluid, and supplies the cooled compressed gas to the incinerator. The third heat exchanger provided in parallel with the first heat exchanger raises the temperature of the fluid by another part different from the at least a part of the exhaust gas, and supplies the heated fluid to the other system. The supply line supplies the fluid supplied from the other system to the second heat exchanger and the third heat exchanger. The supply line is a line that connects the second heat exchanger and the third heat exchanger in parallel, and includes a line that supplies a part of the fluid supplied from the other system to the second heat exchanger and a line that supplies another part of the fluid supplied from the other system to the third heat exchanger. The supply line is an incineration method in which at least one of the supply amount of the fluid supplied to the second heat exchanger and the supply amount of the fluid supplied to the third heat exchanger can be adjusted. **Claim 10** Furthermore, another supply line supplies the exhaust gas to the first heat exchanger and the third heat exchanger. The incineration method according to claim 9, wherein the other supply line can adjust at least one of the supply amount of the exhaust gas supplied to the first heat exchanger and the supply amount of the exhaust gas supplied to the third heat exchanger.

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