Incineration system and lubricating oil supply method

Abstract

To provide an incineration system and a lubricating oil supply method for stably supplying lubricating oil to a bearing.SOLUTION: An incinerator for incinerating an object to be treated, a compressor for compressing combustion air for the incinerator, a supercharger for driving the compressor, a heat exchanger for raising the temperature of the compressed air by exhaust gas from the incinerator and supplying the raised temperature compressed air to the turbine, first and second tanks for storing lubricating oil for a bearing of the supercharger, and a part of the lubricating oil in the first tank being circulated between the first tank and the bearing and another part of the lubricating oil in the first tank being circulated between the first tank and the second tank; The supply unit includes a pipe through which air can be supplied from the air supplier to the second tank, and the pipe does not include a partial pipe in which a supply direction of the lubricating oil supplied from the first tank to the second tank is opposite to a supply direction of the air supplied from the air supplier to the second tank.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an incineration system and a lubricating oil supply method. [Background technology]

[0002] For example, in an incinerator that incinerates sewage sludge (hereinafter simply referred to as sludge or material to be treated), a heat exchanger recovers waste heat from the high-temperature exhaust gas discharged from the incinerator.Then, the incinerator incinerates the sludge by using combustion air heated by the recovered waste heat (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-227441 Summary of the Invention [Problem to be solved by the invention]

[0004] The incinerator described above may be provided with, for example, a turbocharger that supplies combustion air into the furnace, which reduces the power required to operate the blower that supplies combustion air into the furnace, thereby reducing the cost required for incinerating sludge.

[0005] However, if the supply of lubricating oil to the bearings of the turbocharger is interrupted for some reason during operation of the turbocharger as described above, the bearings may be damaged. Therefore, in the turbocharger, a stable supply of lubricating oil to the bearings is desired. [Means for solving the problem]

[0006] The incineration system of the present invention includes an incinerator for incinerating materials to be treated, a turbocharger having a compressor for compressing air supplied to the incinerator to generate compressed air and a turbine for driving the compressor, a heat exchanger for heating the compressed air compressed by the compressor with exhaust gas discharged from the incinerator and supplying the heated compressed air to the turbine, first and second tanks for respectively storing lubricating oil to be supplied to bearings of the turbocharger, and a heat exchanger for circulating a portion of the lubricating oil stored in the first tank between the first tank and the bearings and circulating another portion of the lubricating oil stored in the first tank to the first tank. and a supply unit that can supply the lubricating oil stored in the second tank to the bearing, and an air supplier that supplies air to the second tank to pressurize the inside of the second tank, the supply unit having a pipe that can supply the air from the air supplier to the second tank, and the pipe does not have a partial pipe through which the lubricating oil is supplied from the first tank to the second tank, and the supply direction of the lubricating oil supplied from the first tank to the second tank is opposite to the supply direction of the air supplied from the air supplier to the second tank. [Effects of the Invention]

[0007] According to the incineration system and lubricating oil supply method of the present invention, it is possible to stably supply lubricating oil to bearings. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an incineration system 100. [Figure 2] FIG. 2 is a diagram illustrating a configuration example of a lubricant oil supply system 90 in a comparative example. [Figure 3] FIG. 3 is a diagram illustrating an example of the configuration of the lubricant oil supplying system 10 according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating a configuration example of a lubricant oil supply system 20 according to the second embodiment. [Figure 5] FIG. 5 is a diagram illustrating a modified example of the lubricant oil supply system 20 in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. However, the technical scope of the present invention is not limited to these preferred embodiments.

[0010] [Incineration System 100] First, we will explain the incineration system 100. Figure 1 is a diagram illustrating an example of the configuration of the incineration system 100. Note that the positions and numbers of lines (pipes), pumps, valves, etc. shown below are examples and are not limited to these.

[0011] As shown in FIG. 1, the incineration system 100 includes, for example, an incinerator 1, a turbocharger 2, an air preheater 3, and an air preheater 4.

[0012] The incinerator 1 is, for example, a fluidized bed incinerator that incinerates sludge supplied via line L11. Note that the incinerator 1 is not limited to a fluidized bed incinerator, and various types of incinerators may be used. The incinerator 1 has a so-called fluidized bed 1a. The sludge is also called dehydrated cake. The following description will be given assuming that the incinerator 1 is a fluidized bed incinerator.

[0013] The supercharger 2 has a compressor 2a and a turbine 2b connected via a rotary shaft 2c supported by a bearing (not shown).

[0014] Specifically, the compressor 2a compresses the sucked air to generate compressed air, and supplies the generated compressed air to the air preheater 4. The turbine 2b rotates the rotary shaft 2c by utilizing the energy of the compressed air supplied from the air preheater 4 (in other words, the amount of waste heat discharged from the incinerator 1). The compressor 2a is driven in conjunction with the rotation of the rotary shaft 2c by the turbine 2b, thereby compressing the sucked air to generate compressed air, and supplies the generated compressed air to the air preheater 4.

[0015] The air preheater 3 exchanges heat between the exhaust gas discharged from the incinerator 1 and the compressed air supplied from the turbine 2b.

[0016] Furthermore, the air preheater 4 exchanges heat between the exhaust gas supplied from the air preheater 3 and the compressed air supplied from the compressor 2a.

[0017] Specifically, the air preheater 4 uses the exhaust gas supplied from the air preheater 3 via line L21 to heat the compressed air supplied from the compressor 2a via line L41, and supplies the heated compressed air to the turbine 2b via line L42. The line L21 is a pipe connecting the outlet side of the incinerator 1 with the exhaust gas inlet side of the air preheater 4. The line L41 is also a pipe connecting the outlet side of the compressor 2a with the compressed air inlet side of the air preheater 4. The line L42 is also a pipe connecting the compressed air outlet side of the air preheater 4 with the inlet side of the turbine 2b. The air preheater 3 uses the exhaust gas supplied from the incinerator 1 via line L21 to heat the compressed air supplied from the turbine 2b via line L31, and supplies the heated compressed air to the incinerator 1 (the fluidized bed 1a in the incinerator 1) via line L32.

[0018] The exhaust gas discharged from the air preheater 4 is supplied to an exhaust gas treatment facility (not shown) having, for example, a white smoke prevention air preheater, a scrubber, a smoke washing treatment tower, and the like.

[0019] [Lubricant supply system 90 in comparative example] Next, a lubricating oil supply system 90 in a comparative example will be described. Figure 2 is a diagram illustrating an example of the configuration of the lubricating oil supply system 90 in the comparative example. Note that the lubricating oil supply system 90, the lubricating oil supply system 10 described later, and the lubricating oil supply system 20 described later will each be described as including the turbocharger 2 in the incineration system 100 described in Figure 1.

[0020] 2, the lubricating oil supply system 90 includes, for example, a turbocharger 2, a lubricating oil tank 5 (hereinafter also referred to as the first tank 5), an emergency oil tank 6 (hereinafter also referred to as the second tank 6), and a pump P1. A line L51 (hereinafter also referred to as the first piping) is a circulation piping that sequentially connects the lubricating oil tank 5, the pump P1, and the turbocharger 2. That is, the line L51 is a circulation piping that includes a piping that communicates the lubricating oil tank 5 with the inlet side of the pump P1, a piping that communicates the outlet side of the pump P1 with the inlet side of the turbocharger 2, and a piping that communicates the outlet side of the turbocharger 2 with the lubricating oil tank 5. The line L51 is provided with a valve V1 that adjusts the flow rate of lubricating oil supplied from the lubricating oil tank 5 to the turbocharger 2. Furthermore, the line L52 is a pipe that connects the emergency oil tank 6 with a location on the line L51 between the upstream side of the turbocharger 2 and the downstream side of the lubricating oil tank 5 (downstream side of the valve V1). The line L52 is provided with a valve V2 that adjusts the flow rate of lubricating oil supplied from the emergency oil tank 6 to the turbocharger 2.

[0021] The lubricating oil tank 5 stores lubricating oil to be supplied to a bearing (not shown) that supports the rotating shaft 2c of the turbocharger 2.

[0022] Specifically, the lubricating oil stored in the lubricating oil tank 5 is supplied to the bearings of the turbocharger 2 via a line L51 by, for example, a pump P1. In this case, a valve V1 provided in the line L51 is in an open state to allow the lubricating oil to pass through. Then, the lubricating oil supplied to the turbocharger 2 is supplied again to the lubricating oil tank 5 via, for example, the line L51.

[0023] That is, the lubricating oil stored in the lubricating oil tank 5 is continuously supplied to the bearings of the turbocharger 2 by circulating through the line L51.

[0024] The emergency oil tank 6, like the lubricating oil tank 5, stores lubricating oil to be supplied to the bearings of the turbocharger 2.

[0025] Specifically, when the supply of lubricating oil to the turbocharger 2 is interrupted due to an abnormality (hereinafter also simply referred to as an abnormality) such as a breakdown of the pump P1 or the like, the emergency oil tank 6 supplies lubricating oil to the turbocharger 2 via the line L52. In this case, the valve V2 provided in the line L52 is in an open state to allow the lubricating oil to pass through. Then, the lubricating oil supplied to the turbocharger 2 is supplied to the lubricating oil tank 5 via, for example, a part of the line L51.

[0026] When the lubricating oil stored in the emergency oil tank 6 is supplied to the turbocharger 2, the valve V1 in the line L51 may be in a closed state so that the lubricating oil cannot pass through.

[0027] Here, the head pressure of the lubricating oil stored in the emergency oil tank 6 (hereinafter also simply referred to as head pressure) decreases as the amount of lubricating oil stored in the emergency oil tank 6 decreases. Therefore, when the lubricating oil stored in the emergency oil tank 6 is supplied to the turbocharger 2 by the head pressure, the amount of lubricating oil supplied to the turbocharger 2 gradually decreases due to the drop in head pressure accompanying the decrease in the amount of lubricating oil stored in the emergency oil tank 6.

[0028] Furthermore, when lubricating oil is supplied to the turbocharger 2 by head pressure, the emergency oil tank 6 needs to be installed above the turbocharger 2. Therefore, in this case, the position where the emergency oil tank 6 can be installed is limited.

[0029] Furthermore, when the temperature of the location where the lubricating oil supply system 90 is installed is low, the lubricating oil cools and the viscosity of the lubricating oil increases in the emergency oil tank 6 and the line L52. Therefore, in this case, in the lubricating oil supply system 90, the lubricating oil is no longer stably supplied from the emergency oil tank 6 to the turbocharger 2 due to the increase in the viscosity of the lubricating oil.

[0030] In this regard, for example, by providing a heater (not shown) to raise the temperature of the emergency oil tank 6 or line L52, it becomes possible to raise the temperature of the lubricating oil stored in the emergency oil tank 6 or the lubricating oil flowing through line L52.

[0031] However, in this case, space is required to install the heater and the like, and electricity is required to operate the heater and the like, so the cost required to operate the lubricating oil supply system 90 increases.

[0032] [Lubricant supply system 10 according to the first embodiment] Next, the lubricating oil supplying system 10 in the first embodiment will be described. Fig. 3 is a diagram illustrating a configuration example of the lubricating oil supplying system 10 in the first embodiment. Below, differences from the lubricating oil supplying system 90 in the comparative example will be described.

[0033] As shown in FIG. 3, the lubricant supply system 10 includes, for example, an air supplier 7.

[0034] The air supplier 7 is, for example, an air tank filled with air (compressed air), and supplies the air inside the emergency oil tank 6 to pressurize the inside of the emergency oil tank 6.

[0035] Specifically, when there is a possibility that the supply of lubricating oil to the turbocharger 2 will be interrupted due to, for example, an abnormality occurring in the pump P1 or the like, the air supplier 7 supplies air to the emergency oil tank 6 via the line L53. The line L53 is a pipe that connects the outlet side of the air supplier 7 with the emergency oil tank 6. In this case, the valve V3 provided in the line L53 is in an open state so that air can pass through. Hereinafter, the lines L51, L52, the valves V1, V2, and the pump P1 will also be collectively referred to as a supply unit 40. The supply unit 40 will include the line L53 and the valve V3.

[0036] The emergency oil tank 6 supplies lubricating oil to the turbocharger 2 via the line L52 while the interior of the tank is pressurized by the air supplier 7.

[0037] As a result, in the lubricating oil supply system 10 of this embodiment, even when the amount of lubricating oil stored in the emergency oil tank 6 is small (in other words, when the head pressure of the lubricating oil stored in the emergency oil tank 6 is low), it is possible to supply a stable amount of lubricating oil to the turbocharger 2. Furthermore, in the lubricating oil supply system 10 of this embodiment, the lubricating oil is supplied by pressurizing the inside of the emergency oil tank 6 with air from the air supplier 7, and therefore the lubricating oil is not supplied by head pressure alone. Therefore, in the lubricating oil supply system 10, it is not necessary to install the emergency oil tank 6 above the turbocharger 2, and it is possible to alleviate restrictions on the installation location of the emergency oil tank 6.

[0038] In the above example, the lubricating oil supply system 10 is described as supplying lubricating oil to the turbocharger 2 included in the incineration system 100, but the lubricating oil supply system 10 may also be configured to supply lubricating oil to a turbocharger included in a system other than the incineration system 100. Specifically, the lubricating oil supply system 10 may be configured to supply lubricating oil to bearings of a turbocharger 2 installed on a ship or the like, for example.

[0039] Furthermore, the lubricant oil supply system 10 may supply lubricant oil to an energy conversion device (for example, a generator) other than a turbocharger, for example.

[0040] The lubricant supply system 10 may include, for example, a control device (not shown) that controls the opening and closing of the valves V1, V2, and V3. The control device is, for example, a computer having a CPU (Central Computing Unit) and memory, and controls the opening and closing of the valves V1, V2, and V3 by the CPU working in conjunction with a program stored in a storage device (not shown). Controlling the valve to open means increasing the valve opening, and can also mean, for example, increasing the opening from a fully closed position. Controlling the valve to close means decreasing the valve opening, and can also mean, for example, decreasing the opening from a fully open position. In the following description, controlling the valve to open means fully opening the valve (100% opening), and controlling the valve to close means fully closing the valve (0% opening), but these are not limited thereto.

[0041] Specifically, in this case, the control device determines whether or not an abnormality such as a breakdown of the pump P1 has occurred in the lubricating oil supply system 10 (incineration system 100).

[0042] Then, when it is determined that an abnormality has occurred, the control device supplies the lubricating oil stored in the emergency oil tank 6 to the turbocharger 2 (bearings), for example, by controlling the air supplier 7 to pressurize the inside of the emergency oil tank 6. That is, in this case, the control device performs, for example, control to open the valves V2 and V3, and control to close the valve V1.

[0043] On the other hand, if it is determined that no abnormality has occurred, the control device, for example, circulates the lubricating oil stored in the lubricating oil tank 5 between the lubricating oil tank 5 and the turbocharger 2 (bearings). That is, in this case, the control device, for example, performs control to close the valves V2 and V3 and control to open the valve V1.

[0044] As a result, in the lubricating oil supply system 10, when an abnormality occurs, it becomes possible to automatically start supplying lubricating oil from the emergency oil tank 6 to the turbocharger 2. Therefore, in the lubricating oil supply system 10, it becomes possible to automatically continue supplying lubricating oil to the turbocharger 2 even when an abnormality occurs.

[0045] [Lubricant supply system 20 according to the second embodiment] Next, a lubricant oil supplying system 20 in a second embodiment will be described. Fig. 4 is a diagram illustrating a configuration example of the lubricant oil supplying system 20 in the second embodiment. Below, differences from the lubricant oil supplying system 90 in the comparative example will be described.

[0046] As shown in Figure 4, the lubricating oil supply system 20 has a line L54 that supplies a portion of the lubricating oil circulating through line L51 to the emergency oil tank 6, and a line L55 that supplies a portion of the lubricating oil stored in the emergency oil tank 6 to line L51.

[0047] 4, the line L54 is a pipe that branches off from the line L51 at a location between the upstream side of the turbocharger 2 (upstream side of the valve V1) and the downstream side of the lubricating oil tank 5, and communicates with the emergency oil tank 6. The line L54 is provided with a valve V4 that adjusts the flow rate of lubricating oil supplied from the lubricating oil tank 5 to the emergency oil tank 6.

[0048] The line L55 is a pipe that communicates with the emergency oil tank 6 and joins the line L51 at a location between the downstream side of the turbocharger 2 and the upstream side of the lubricating oil tank 5.

[0049] Hereinafter, line L54 will also be referred to as the second pipe, and line L55 will also be referred to as the third pipe. Furthermore, hereinafter, of the lubricating oil supplied from the lubricating oil tank 5 via line L51, the amount of lubricating oil supplied to the turbocharger 2 will also be referred to as the first amount, and the amount of lubricating oil supplied to the emergency oil tank 6 via line L54 will also be referred to as the second amount.

[0050] Specifically, in the lubricant supply system 20, for example, a portion of the lubricant supplied from the lubricant tank 5 to the turbocharger 2 by the pump P1 is supplied to the emergency oil tank 6 via the line L54. Then, in the lubricant supply system 20, for example, the same amount of lubricant as that supplied via the line L54 is supplied to the line L51 via the line L55. In this case, the valve V4 provided in the line L54 is in an open state to allow the lubricant to pass through. Hereinafter, the supply unit 40 is assumed to include the line L54, the valve V4, and the line L55.

[0051] In other words, in the lubricating oil supply system 20, by circulating a portion of the lubricating oil circulating through line L51 while supplying it to the emergency oil tank 6, it is possible to suppress a drop in the temperature of the lubricating oil stored in the emergency oil tank 6.

[0052] As a result, in the lubricant oil supply system 20 of this embodiment, even if the temperature of the location where the lubricant oil supply system 20 is installed is low, it is possible to suppress an increase in viscosity of the lubricant oil stored in the emergency oil tank 6 and the lubricant oil flowing through the line L52, and it is possible to supply a stable amount of lubricant oil to the turbocharger 2. Therefore, in the lubricant oil supply system 20, it is not necessary to provide a heater or the like for raising the temperature of the emergency oil tank 6 or the line L52, or the operating time of the heater can be shortened, making it possible to suppress an increase in the cost required to operate the lubricant oil supply system 20.

[0053] As in the case of the lubricant oil supply system 10, the lubricant oil supply system 20 may include, for example, a control device that controls the opening and closing of the valves V1, V2, and V4.

[0054] Specifically, in this case, the control device determines whether or not an abnormality such as a breakdown of the pump P1 has occurred in the lubricating oil supply system 20 (incineration system 100).

[0055] If it is determined that an abnormality has occurred, the control device supplies, for example, lubricating oil stored in the emergency oil tank 6 to the turbocharger 2 (bearings). That is, in this case, the control device performs, for example, control to open the valve V2 and control to close the valves V1 and V4.

[0056] On the other hand, if it is determined that no abnormality has occurred, the control device, for example, circulates a portion of the lubricating oil stored in the lubricating oil tank 5 between the lubricating oil tank 5 and the turbocharger 2, and circulates another portion of the lubricating oil stored in the lubricating oil tank 5 between the lubricating oil tank 5 and the emergency oil tank 6, bypassing the turbocharger 2. That is, in this case, the control device, for example, performs a control to close the valve V2, and performs a control to open the valves V1 and V4.

[0057] As a result, in the lubricating oil supply system 20, similar to the case of the lubricating oil supply system 10, it becomes possible to automatically start the supply of lubricating oil from the emergency oil tank 6 to the turbocharger 2 when an abnormality occurs. Therefore, in the lubricating oil supply system 20, it becomes possible to automatically continue the supply of lubricating oil to the turbocharger 2 even when an abnormality occurs. Furthermore, similar to the lubricating oil supply system 10, the lubricating oil supply system 20 may include an air supplier 7. The air supplier 7 may supply air to the emergency oil tank 6 via the line L53 when there is a possibility that the supply of lubricating oil to the turbocharger 2 will be interrupted due to, for example, the occurrence of an abnormality in the pump P1 or the like.

[0058] [Modification of the lubricating oil supply system 20 in the second embodiment] Next, a modified example of the lubricating oil supply system 20 in the second embodiment will be described. Figure 5 is a diagram illustrating a modified example of the lubricating oil supply system 20 in the second embodiment. Specifically, Figure 5(A) is a diagram illustrating the flow of lubricating oil when an abnormality occurs, and Figure 5(B) is a diagram illustrating the flow of lubricating oil under normal conditions.

[0059] 5, the line L52 may branch off from a point P in the line L54 (a point between the emergency oil tank 6 and the connection point between the line 51 and the line L54) and communicate with the line L51. Hereinafter, the portion of the line L54 between the emergency oil tank 6 and the point P will also be referred to as a line L54a. Hereinafter, the line L52 will also be referred to as a branch pipe L52.

[0060] That is, when an abnormality occurs, the lubricating oil stored in the emergency oil tank 6 may be supplied to the line L51 (turbocharger 2) via the line L54a and the line L52 in this order. Furthermore, during normal operation, the lubricating oil supplied from the lubricating oil tank 5 via the line L51 may be supplied to the emergency oil tank 6 via the line L54 (including the line L54a).

[0061] Specifically, when the control device determines that an abnormality has occurred, it controls valve V2 (hereinafter also referred to as second valve V2) to open and controls valve V5 (hereinafter also referred to as first valve V5) provided in line L54 to close, as shown in FIG. 5(A). Valve V5 may be a check valve. On the other hand, when the control device determines that no abnormality has occurred, it controls valve V2 to close and valve V5 to open, as shown in FIG. 5(B).

[0062] As a result, in the lubricant supply system 20, when supplying the lubricant stored in the emergency oil tank 6 to the line L51 (turbocharger 2), it is possible to route the lubricant through the line L54a whose temperature has been increased. Therefore, in the lubricant supply system 20, it is possible to further suppress an increase in the viscosity of the lubricant flowing through the line L52, and it is possible to supply a more stable amount of lubricant to the turbocharger 2. [Explanation of symbols]

[0063] 1: Incinerator 1a: Fluidized bed 2: Turbocharger 2a: Compressor 2b: Turbine 2c: Rotating shaft 3: Air preheater 4: Air preheater 5: Lubricating oil tank 6: Emergency oil tank 7: Air supply 10: Lubricating oil supply system 20: Lubricating oil supply system 40: Supply section 90: Lubricating oil supply system 100: Incineration system P1: Pump L11: Line L21: Line L31: Line L32: Line L33: Bypass L41: Line L42: Line L51: Line L52: Line L53: Line L54: Line L54a: Line L55: Line V1: Valve V2: Valve V3: Valve V4: Valve V5: Valve

Claims

1. an incinerator for incinerating the material to be treated; a turbocharger having a compressor that compresses air supplied to the incinerator to generate compressed air and a turbine that drives the compressor; a heat exchanger that heats the compressed air compressed by the compressor with exhaust gas discharged from the incinerator and supplies the heated compressed air to the turbine; First and second tanks each storing lubricating oil to be supplied to the bearings of the turbocharger; a supply unit that circulates a portion of the lubricating oil stored in the first tank between the first tank and the bearing, circulates another portion of the lubricating oil stored in the first tank between the first tank and the second tank, and is further capable of supplying the lubricating oil stored in the second tank to the bearing; an air supplier that supplies air to the second tank to pressurize the inside of the second tank, the supply unit has a pipe capable of supplying the air from the air supplier to the second tank, An incineration system in which the piping does not have a partial piping through which the lubricating oil is supplied from the first tank to the second tank, and the supply direction of the lubricating oil supplied from the first tank to the second tank is opposite to the supply direction of the air supplied from the air supplier to the second tank.

2. An incinerator for incinerating materials to be treated; a turbocharger having a compressor that compresses air supplied to the incinerator to generate compressed air and a turbine that drives the compressor; a heat exchanger that heats the compressed air compressed by the compressor with exhaust gas discharged from the incinerator and supplies the heated compressed air to the turbine; First and second tanks each storing lubricating oil to be supplied to the bearings of the turbocharger; a supply unit that circulates the lubricating oil stored in the first tank between the first tank and the bearing, and further that is capable of supplying the lubricating oil stored in the second tank from the second tank to the bearing; an air supplier that supplies air to the second tank to pressurize the inside of the second tank, An incineration system wherein the supply unit has a pipe that is connected to the air supplier and the second tank and that can supply the air from the air supplier to the second tank, and the lubricating oil stored in the second tank is not supplied to the pipe.

3. An incineration system as described in claim 2, wherein the compressed air is supplied from the turbine to the incinerator.

4. The present invention relates to an incinerator for incinerating materials to be treated, a turbocharger having a compressor for compressing air supplied to the incinerator to generate compressed air and a turbine for driving the compressor, a heat exchanger for heating the compressed air compressed by the compressor using exhaust gas discharged from the incinerator and supplying the heated compressed air to the turbine, first and second tanks for respectively storing lubricating oil to be supplied to bearings of the turbocharger, a part of the lubricating oil stored in the first tank circulating between the first tank and the bearings, and another part of the lubricating oil stored in the first tank circulating between the first tank and the second tank, and a supply unit capable of supplying the lubricating oil stored in the second tank to the bearings, and an air supplier that supplies air to the second tank to pressurize the inside of the second tank, the supply unit having a pipe capable of supplying the air from the air supplier to the second tank, the pipe being a partial pipe through which the lubricating oil is supplied from the first tank to the second tank, and the pipe not having a partial pipe in which the supply direction of the lubricating oil supplied from the first tank to the second tank is opposite to the supply direction of the air supplied from the air supplier to the second tank, A lubricating oil supply method in which, when an abnormality occurs in the incineration system, the lubricating oil stored in the second tank is supplied to the bearing via the supply unit, and when the abnormality does not occur, a portion of the lubricating oil stored in the first tank is circulated between the first tank and the bearing via the supply unit, and another portion of the lubricating oil stored in the first tank is circulated between the first tank and the second tank, bypassing the bearing.

5. A lubricating oil supply method in an incineration system comprising: an incinerator for incinerating materials to be treated; a supercharger having a compressor for compressing air supplied to the incinerator to generate compressed air and a turbine for driving the compressor; a heat exchanger for heating the compressed air compressed by the compressor with exhaust gas discharged from the incinerator and supplying the heated compressed air to the turbine; first and second tanks for storing lubricating oil to be supplied to bearings of the supercharger; a supply unit for circulating the lubricating oil stored in the first tank between the first tank and the bearings and further capable of supplying the lubricating oil stored in the second tank from the second tank to the bearings; and an air supplier for supplying air to the second tank to pressurize the second tank, wherein the supply unit is in communication with the air supplier and the second tank and has piping for supplying the air from the air supplier to the second tank, and the lubricating oil stored in the second tank is not supplied to the piping, A lubricating oil supply method in which, when an abnormality occurs in the incineration system, pressurization is applied to the second tank and the lubricating oil stored in the second tank is supplied from the second tank to the bearing via the supply unit.

Images