Intake air cooling device, gas turbine plant including the same, and intake air cooling method

Abstract

To suppress the consumption of circulating water for cooling air while suppressing the discharge of water from an intake outlet of an intake duct.SOLUTION: The intake air cooling device includes an intake duct, a cooler capable of cooling air by bringing air and water flowing into the intake duct into contact with each other, a cooling water tank capable of storing water, a cooling water pump capable of supplying water in the cooling water tank to the cooler, a tray capable of receiving water cooled by the cooler, a cooling water recovery line capable of guiding the water in the tray to the cooling water tank, a weir capable of damming up water overflowing from the tray in the intake duct, a drain line capable of draining water accumulated on the upstream side of the weir in the intake duct, and a water detector capable of detecting whether water flows into the drain line and issuing an alarm when detecting the flow of water into the drain line.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an intake air cooling device, a gas turbine plant including the same, and an intake air cooling method. [Background technology]

[0002] An example of a device for guiding outside air to a gas turbine or the like is an intake air cooling device disclosed in Patent Document 1 below. This device includes an intake duct and a filter, a cooler, and a silencer arranged within the intake duct. The cooler is arranged downstream of the filter in the direction of air flow within the intake duct. The silencer is arranged downstream of the cooler. This device also includes a chiller that cools cooling water, a cooling water supply line that guides the water cooled by the chiller to the cooler, a cooling water pump that is provided in the cooling water supply line and is capable of supplying water from the chiller to the cooler, a drain pan (or tray) that is arranged below the cooler and receives the water used to cool the air in the cooler, and a cooling water recovery line that guides the water received in the drain pan to the chiller.

[0003] In this device, water circulates through a water circulation line that is made up of a refrigerator, a cooling water supply line, a cooling water pump, a cooler, a drain pan, and a cooling water recovery line.

[0004] However, with this system, depending on the amount of water supplied to the cooler, water may overflow from the drain pan, flowing through the intake duct and reaching the compressor of the gas turbine, potentially damaging the compressor blades and other components.

[0005] Therefore, this device further includes a protruding step (or weir) located in the intake duct downstream of the silencer, and a drainage line that can drain water that has accumulated in the intake duct upstream of the protruding step. That is, in this device, the protruding step in the intake duct blocks water that overflows from the tray, and the water blocked by the protruding step is drained to the outside through the drainage line. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-190252 Summary of the Invention [Problem to be solved by the invention]

[0007] The technology described in Patent Document 1 can prevent water overflowing from the tray from reaching the compressor of the gas turbine.

[0008] Incidentally, in an intake air cooling device, it is desirable to minimize consumption of circulating water, which is water circulating in a water circulation line, from the viewpoint of reducing running costs.

[0009] Therefore, an object of the present disclosure is to provide a technology that can reduce the consumption of circulating water while suppressing the discharge of water from the intake outlet of the intake duct. [Means for solving the problem]

[0010] An intake air cooling device as one aspect for achieving the above object includes: an intake duct having an intake port capable of sucking in air and an intake outlet from which the air sucked in from the intake port flows out; a cooler arranged in the intake duct and capable of cooling the air by bringing the air that has flowed into the intake duct from the intake port into contact with water; a cooling water tank capable of storing water for cooling; a cooling water supply line that can lead water in the cooling water tank to the cooler; a cooling water pump provided in the cooling water supply line that can supply water in the cooling water tank to the cooler; a tray arranged below the cooler to receive water used to cool the air in the cooler; to the cooling water tank; a weir in the intake duct, located downstream of the intake port where the intake outlet is located relative to the cooler, and capable of damming up water that overflows from the tray and water that splashes from the cooler without reaching the tray; a drain line in the intake duct, located upstream of the intake port where the intake port is located relative to the weir, and capable of draining water that has accumulated in the intake duct; and a water detector that detects whether water has flowed into the drain line and is capable of issuing an alarm when water has flowed into the drain line.

[0011] In this embodiment, the cooling water tank, the cooling water supply line, the cooling water pump, the cooler, the tray, and the cooling water recovery line constitute a water circulation line through which water circulates.

[0012] However, depending on the amount of water supplied to the cooler, water may overflow from the tray. Water from the cooler may also splash without reaching the tray. That is, water may leak out of the water circulation line. In this case, water accumulates in the air intake duct, and the weir prevents water from flowing downstream of the weir. Water that accumulates upstream of the weir flows into the drain line. In this embodiment, when water flows into the drain line, the water detector detects this and issues an alarm. If the cooling water pump is stopped based on this alarm, the supply of water to the cooler will stop. Stopping the supply of water to the cooler prevents water from overflowing from the tray and also prevents water from the cooler from splashing without reaching the tray.

[0013] Therefore, in this aspect, it is possible to prevent water from overflowing the weir and being discharged from the intake outlet of the intake duct. Furthermore, in this aspect, it is possible to reduce the consumption of circulating water, which is water flowing in the water circulation line.

[0014] One aspect of a gas turbine plant for achieving the above object is to The present invention includes an intake air cooling device according to one aspect, and a gas turbine, the gas turbine including a compressor capable of compressing air that has passed through the intake duct to generate compressed air, a combustor capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas.

[0015] In this embodiment, it is possible to prevent water from overflowing the weir and being discharged from the intake outlet of the intake duct, thereby preventing damage to the compressor 10 caused by water from the intake duct.

[0016] An intake air cooling method as one aspect for achieving the above object is an intake air cooling method in an intake air cooling device as follows. This intake air cooling device includes an intake duct having an intake port capable of sucking in air and an intake outlet from which the air sucked in from the intake port flows out, a cooler arranged in the intake duct and capable of cooling the air by bringing the air that flows into the intake duct from the intake port into contact with water, a cooling water tank capable of storing water for cooling, a cooling water supply line that can introduce water from the cooling water tank to the cooler, a cooling water pump that is provided in the cooling water supply line and can supply water from the cooling water tank to the cooler, and a cooling water pump arranged below the cooler. The cooling water tank is provided with a tray that receives water used to cool the air in the cooler, a cooling water recovery line that can guide the water received in the tray to the cooling water tank, a weir that is located within the air intake duct downstream of the air intake outlet relative to the cooler and that can block water that overflows from the tray and water that splashes from the cooler without reaching the tray, and a drainage line that can drain water that has accumulated within the air intake duct upstream of the air intake outlet relative to the weir. The intake air cooling method in this intake air cooling device includes a cooling water supply process in which the cooling water pump is driven to supply water from the cooling water tank to the cooler, a water detection process in which whether water has flowed into the drain line or not is detected and an alarm is issued if water inflow into the drain line is detected, and a cooling water supply stop process in which the cooling water pump is stopped to stop the supply of water to the cooler if the alarm is issued in the water detection process.

[0017] In this aspect, as with the intake air cooling device in the first aspect, it is possible to prevent water from being discharged from the intake outlet of the intake duct, and it is also possible to reduce the consumption of circulating water, which is the water flowing in the water circulation line. [Effects of the Invention]

[0018] In one aspect of the present disclosure, it is possible to reduce the consumption of circulating water while suppressing the discharge of water from the intake outlet of the intake duct. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic configuration diagram of a gas turbine plant according to a first embodiment of the present disclosure. FIG. [Figure 2] 4 is a flowchart showing an operation of the intake air cooling device of the gas turbine plant in the first embodiment according to the present disclosure. [Figure 3] FIG. 4 is a schematic configuration diagram of a gas turbine plant according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, several embodiments of a gas turbine plant including an intake air cooling device according to the present disclosure will be described with reference to the drawings.

[0021] "First embodiment of gas turbine plant" The gas turbine plant of this embodiment will be described below with reference to FIGS.

[0022] As shown in FIG. 1, the gas turbine plant in this embodiment includes a gas turbine GT and an intake air cooling device 40.

[0023] The gas turbine GT includes a compressor 10 capable of compressing air A to generate compressed air Acom, a plurality of combustors 20 capable of burning fuel F in the compressed air Acom to generate combustion gas, a turbine 30 driven by the high-temperature, high-pressure combustion gas, and an intermediate casing 25.

[0024] The compressor 10 has a compressor rotor 11 that can rotate about an axis Ar, a compressor casing 12 that covers the compressor rotor 11, and an intake casing 15. The turbine 30 has a turbine rotor 31 that can rotate about the axis Ar, a turbine casing 32 that covers the turbine rotor 31, and an exhaust casing 35. Note that, hereinafter, the direction in which the axis Ar extends is referred to as the axial direction Da, one side in the axial direction Da is referred to as the axial upstream side Dau, and the other side in the axial direction Da is referred to as the axial downstream side Dad.

[0025] The compressor 10 is disposed on the axial upstream side Dau with respect to the turbine 30. An intake casing 15 of the compressor 10 is connected to the end of the axial upstream side Dau of the compressor casing 12. This intake casing 15 can efficiently guide air A into the compressor casing 12.

[0026] An exhaust casing 35 of the turbine 30 is connected to the end of the turbine casing 32 on the axial downstream side Dad. The exhaust casing 35 is connected to a chimney 39, for example, via an exhaust duct. Note that a heat recovery boiler that generates steam by utilizing the heat of exhaust gas from the turbine 30 may be connected to the exhaust duct.

[0027] The intermediate casing 25 is disposed between the compressor casing 12 and the turbine casing 32 in the axial direction Da. An end of the intermediate casing 25 on the axial upstream side Dau is connected to an end of the compressor casing 12 on the axial downstream side Dad. An end of the intermediate casing 25 on the axial downstream side Dad is connected to an end of the turbine casing 32 on the axial upstream side Dau. The multiple combustors 20 are attached to the intermediate casing 25 and lined up in the circumferential direction about the axis Ar.

[0028] The compressor rotor 11 and the turbine rotor 31 are positioned on the same axis Ar and are connected to each other to form a gas turbine rotor 1. To this gas turbine rotor 1, for example, a rotor of a generator GEN is connected.

[0029] The intake air cooling device 40 comprises an intake duct 41, a filter 42 capable of removing foreign matter from the air that flows into the intake duct 41, a plurality of coolers 45 capable of cooling the air that flows into the intake duct 41, and a silencer 43 capable of reducing the noise generated by the air flowing through the intake duct 41.

[0030] Intake duct 41 has an intake port 41i that can draw in air A, an intake outlet 41o through which the air drawn in from intake port 41i flows out, a horizontal section 41a that extends horizontally, a transition section 41b that is connected to horizontal section 41a and extends downward as it moves away from horizontal section 41a, and a vertical section 41c that is connected to transition section 41b and extends downward. Here, in the direction of air flow within intake duct 41, the side on which intake port 41i is located relative to intake outlet 41o is referred to as upstream side Du, and the opposite side is referred to as downstream side Dd.

[0031] The intake duct 41 has an opening at its most upstream end Du facing horizontally, which forms the intake port 41i. The horizontal portion 41a extends horizontally from the intake port 41i. The vertical portion 41c has an opening at its lowermost vertical end facing vertically, which forms the intake outlet 41o. The intake outlet 41o is connected to the intake casing 15 of the compressor 10. The horizontal portion 41a has a pair of side plates 41as facing each other at a distance in a horizontal direction perpendicular to the direction in which the horizontal portion 41a extends, a top plate 41at connecting the upper edges of the pair of side plates 41as, and a bottom plate 41ab connecting the lower edges of the pair of side plates 41as. Air flows toward the downstream side Dd within the space enclosed by the pair of side plates 41as, the top plate 41at, and the bottom plate 41ab within the horizontal portion 41a.

[0032] The aforementioned filter 42, the plurality of coolers 45, and the silencer 43 are all disposed within the horizontal portion 41a of the intake duct 41. The plurality of coolers 45 are disposed downstream Dd of the filter 42. The silencer 43 is disposed downstream Dd of the cooler 45. The plurality of coolers 45 are aligned vertically. Each of the plurality of coolers 45 has a plurality of partition plates 46 aligned vertically. The air A and cooling water that flow into the intake duct 41 both pass between the plurality of partition plates 46 and flow to the downstream side Dd. At this time, the air comes into contact with the cooling water, and the air is cooled.

[0033] The intake air cooling device 40 further includes a cooling water tank 47, a blow line 48, a blow valve 49, a cooling water supply line 50, a cooling water pump 51, a plurality of trays 52, a cooling water recovery line 53, a pure water tank 54, a pure water line 55, and a pure water pump 56.

[0034] The cooling water tank 47 is capable of storing water for cooling. A blow line 48 for draining the water in the cooling water tank 47 is connected to the cooling water tank 47. A blow valve 49 is provided on the blow line 48. The pure water tank 54 is capable of storing pure water. The pure water tank 54 and the cooling water tank 47 are connected by a pure water line 55 that can guide the pure water in the pure water tank 54 to the cooling water tank 47 as cooling water. A pure water pump 56 is provided on the pure water line 55.

[0035] The cooling water supply line 50 is a line that can guide water in the cooling water tank 47 to the multiple coolers 45. The cooling water supply line 50 has a main supply line 50m connected to the cooling water tank 47 and branch supply lines 50b that branch off from the main supply line 50m for each of the multiple coolers 45. The branch supply lines 50b can spray water from the main supply line 50m into the coolers 45. The cooling water pump 51 is provided in the main supply line 50m and is a pump that can supply water in the cooling water tank 47 to the multiple coolers 45 via the cooling water supply line 50. Each of the multiple trays 52 is disposed below any one of the multiple coolers 45 and can receive water that has been used to cool air in that one cooler 45.

[0036] The cooling water recovery line 53 is a line capable of guiding water accumulated in the plurality of trays 52 to the cooling water tank 47. The cooling water recovery line 53 includes tray connection recovery lines 53c connected to each of the plurality of trays 52, and a main recovery line 53m connected to the tray connection recovery lines 53c connected to each of the plurality of trays 52 and connected to the cooling water tank 47. The cooling water recovery line 53 may also include tray connection recovery lines 53c connected to a plurality of trays 52 excluding the lowest tray 52, which is the lowest tray 52, and a main recovery line 53m connected to the lowest tray 52 and connected to the cooling water tank 47. In this case, the tray connection recovery line 53c connected to one tray 52 can guide water accumulated in that tray 52 into the tray 52 located below that tray 52.

[0037] The cooling water tank 47, cooling water supply line 50, cooling water pump 51, multiple coolers 45, multiple trays 52, and cooling water recovery line 53 described above constitute a water circulation line. Water circulates within this water circulation line. When the amount of water in this water circulation line becomes low, pure water from the pure water tank 54 is supplied to the cooling water tank 47 as cooling water.

[0038] The intake air cooling device 40 further includes a weir 59 , a drain line 60 , and a water detector 65 .

[0039] The weir 59 is disposed in the intake duct 41 on the downstream side Dd of the plurality of coolers 45 and on the upstream side Du of the silencer 43. The weir 59 can block water that overflows from any of the plurality of trays 52 and water that splashes from the plurality of coolers 45 without reaching the tray 52. ​​The weir 59 protrudes upward from the bottom plate 41ab of the horizontal portion 41a and extends from the first side plate 41as to the second side plate 41as of the pair of side plates 41as of the horizontal portion 41a.

[0040] The drain line 60 includes a drain pipe 61, a drain pot 62, and a drain valve 63. The drain pipe 61 is connected to a position in the bottom plate 41ab of the horizontal section 41a between the multiple coolers 45 and the weir 59 so that water that has accumulated upstream of the weir 59 in the intake duct 41 can flow in. The drain pipe 61 has a drain port 61o through which the inflowing water can be drained. The drain pot 62 is provided in the drain pipe 61 and is a pot that can temporarily store water that has flowed through the drain pipe 61. The drain valve 63 is a valve that can be switched between an open state in which water accumulated in the drain pot 62 can be drained from the drain port 61o, and a closed state in which the water cannot be drained from the drain port 61o.

[0041] The water detector 65 detects whether water has flowed into the drain line 60 and can issue an alarm when it detects water flowing into the drain line 60. The water detector 65 is a water meter that can detect the amount of water in the drain pot 62. When the amount of water in the drain pot 62 exceeds a predetermined amount, the water detector 65 determines that water has flowed into the drain line 60 and issues an alarm. This alarm may be an audible alarm that is generated at the location where the water detector 65 is installed or in the control room of the gas turbine plant, or may be an audio or visual display that indicates that water has flowed into the drain line 60. When the amount of water in the drain pot 62 does not change for a predetermined period of time, the water detector 65 determines that water is not flowing into the drain line 60 and issues a warning to that effect.

[0042] Next, the work of the worker and the operation of the intake air cooling device 40 will be described with reference to the flowchart shown in FIG.

[0043] While the gas turbine GT is operating, the cooling water pump 51 is basically operating, and water in the cooling water tank 47 is supplied to the plurality of coolers 45 via the cooling water supply line 50 and the cooling water pump 51 (cooling water supply step S1). The water supplied to the coolers 45 comes into contact with the air passing through the coolers 45 and cools the air. The water flows out of the coolers 45 and accumulates in trays 52 arranged below the coolers 45. The water accumulated in the trays 52 returns to the cooling water tank 47 via a cooling water recovery line 53.

[0044] Incidentally, the amount of water sent from the cooling water tank 47 to the plurality of coolers 45 may change due to a change in the output of the gas turbine GT or the like. When the amount of water sent from the cooling water tank 47 to the plurality of coolers 45 is increasing, water may overflow from the tray 52. ​​Furthermore, regardless of whether the amount of water sent to the plurality of coolers 45 is increasing, water from the coolers 45 may splash without reaching the tray 52. ​​In other words, water may leak from the water circulation line. This water accumulates on the bottom plate 41ab of the intake duct 41, and the weir 59 prevents the water from flowing out to the downstream side Dd of the weir 59.

[0045] When water accumulates on the upstream side Du of the weir 59, this water flows into the drainage line 60.

[0046] While the gas turbine GT is in operation, the water detection step S2 is constantly executed by the water detector 65. In this water detection step S2, it is detected whether or not water has flowed into the drain line 60 (S2a), and an alarm is issued if an inflow of water into the drain line 60 is detected (S2b). At this time, as described above, when the amount of water in the drain pot 62 becomes equal to or greater than a predetermined amount of water, the water detector 65 determines that water has flowed into the drain line 60 and issues an alarm. Furthermore, when the amount of water in the drain pot 62 does not change for a predetermined time, the water detector 65 determines that water is not flowing into the drain line 60 and issues a notification to that effect.

[0047] When an alarm is issued in the water detection step S2, an operator stops the cooling water pump 51 to stop the supply of water from the cooling water tank 47 to the plurality of coolers 45 (cooling water supply stopping step S3).

[0048] Even if the cooling water supply stopping step S3 is executed, the water detector 65 executes the water detection step S2. In this water detection step S2, the water detector 65 transmits a signal to the control room of the gas turbine plant, for example, that water is not flowing into the drainage line 60. In this case, an operator in the control room determines whether this signal was transmitted immediately after an alarm was issued (determination step S4).

[0049] If the worker determines that the above-mentioned transmission did not occur immediately after the alarm transmission, the worker restarts the cooling water pump 51 to resume the supply of water from the cooling water tank 47 to the plurality of coolers 45 (cooling water supply step S1).

[0050] On the other hand, if the operator determines that the above-mentioned transmission occurred immediately after the alarm transmission, the operator opens the drain valve 63 for a predetermined time period to drain the water from the drain pot 62 through the drain pipe 61 (drain step S5). Note that the predetermined time here is the time it is expected that the water in the drain pot 62 will be empty. By executing this drain step S5, the water in the drain pot 62 can be drained, and preparations can be made for the next time water will flow into the drain line 60.

[0051] When the draining step S5 is completed, the worker restarts the cooling water pump 51 to resume the supply of water from the cooling water tank 47 to the plurality of coolers 45 (cooling water supply step S1).

[0052] As described above, when water that overflows from the tray 52 or water that splashes from the cooler 45 without reaching the tray 52 accumulates in the air intake duct 41, in this embodiment, the weir 59 prevents the water from flowing downstream Dd of the weir 59. Water that accumulates upstream Du of the weir 59 flows into the drain line 60 in this embodiment. When water flows into the drain line 60, the water detector 65 detects this and issues an alarm. If the cooling water pump 51 is stopped based on this alarm, the supply of water to the cooler 45 is stopped. Stopping the supply of water to the cooler 45 prevents water from overflowing from the tray 52 and also prevents water from the cooler 45 from splashing without reaching the tray 52.

[0053] For this reason, in this embodiment, it is possible to prevent water from overflowing the weir 59 and being discharged from the intake outlet 41o of the intake duct 41. This makes it possible to prevent damage to the compressor caused by water from the intake duct 41. Furthermore, in this embodiment, it is possible to reduce the consumption of circulating water, which is water flowing in the water circulation line.

[0054] In addition, in this embodiment, the filter 42 can reduce the amount of foreign matter in the air passing through the cooler 45, thereby suppressing contamination of the circulating water by the foreign matter. Furthermore, in this embodiment, the water can be prevented from overflowing the weir 59 and flowing out to the downstream side Dd of the weir 59, thereby suppressing a decrease in the silencing effect of the silencer 43 due to a part of the silencer 43 being submerged in water.

[0055] "Second embodiment of gas turbine plant" The gas turbine plant of this embodiment will be described below with reference to FIG.

[0056] The gas turbine plant in this embodiment is a plant in which a control device 70 is added to the gas turbine plant in the first embodiment.

[0057] The control device 70 controls the operation of the cooling water pump 51 and the drain valve 63 in response to a signal from the water detector 65. Specifically, when the water detector 65 issues an alarm in a water detection step S2 in the flowchart shown in FIG. 2, the control device 70 stops the cooling water pump 51 and executes a cooling water supply stop step S3. Furthermore, when the water detector 65 issues a signal indicating that water is not flowing into the drain line 60 in the water detection step S2, the control device 70 determines whether this signal was issued immediately after the alarm was issued (determination step S4). If the control device 70 determines that this signal was issued immediately after the alarm was issued, the control device 70 opens the drain valve 63 and executes a drain step S5. Thereafter, the control device 70 restarts the cooling water pump 51 and resumes the supply of water from the cooling water tank 47 to the multiple coolers 45 (cooling water supply step S1). Furthermore, if the control device 70 determines that this transmission does not occur immediately after an alarm has been transmitted, it immediately restarts the cooling water pump 51 to resume the supply of water from the cooling water tank 47 to the multiple coolers 45 (cooling water supply process S1).

[0058] As described above, in this embodiment, the control device 70 controls the driving and stopping of the cooling water pump 51, which reduces the burden on the worker.

[0059] Furthermore, in this embodiment, the time from when the water detector 65 issues an alarm to when the cooling water pump 51 stops can be made shorter than when an operator stops the cooling water pump 51, which not only reduces the amount of circulating water consumed but also minimizes the time when the cooling water pump 51 is not operating.

[0060] "Variations" The intake air cooling device 40 in the above embodiment does not include a circulating water cooler that cools the circulating water. However, if necessary, a circulating water cooler may be provided, for example, in the cooling water tank 47 or in the main supply line 50m of the cooling water supply line 50, downstream Dd of the cooling water pump 51.

[0061] Furthermore, the present disclosure is not limited to the embodiments described above, and various additions, modifications, substitutions, partial deletions, etc. are possible within the scope of the conceptual idea and spirit of the present invention as derived from the content defined in the claims and their equivalents.

[0062] "Addendum" The intake air cooling device 40 in each of the above embodiments can be understood, for example, as follows.

[0063] (1) The intake air cooling device 40 in the first embodiment is an intake duct 41 having an intake port 41i capable of sucking in air and an intake outlet 41o from which the air sucked in from the intake port 41i flows out; a cooler 45 arranged in the intake duct 41 and capable of cooling the air by bringing the air that has flowed into the intake duct 41 from the intake port 41i into contact with water; a cooling water tank 47 capable of storing water for cooling; a cooling water supply line 50 that can lead the water in the cooling water tank 47 to the cooler 45; a cooling water pump 51 provided in the cooling water supply line 50 and capable of supplying the water in the cooling water tank 47 to the cooler 45; a tray 52 arranged below the cooler 45 and receiving the water used to cool the air in the cooler 45; to the cooling water tank 47; a weir 59 located in the intake duct 41 on the downstream side Dd where the intake outlet 41o is located relative to the intake port 41i, with respect to the cooler 45, and capable of damming up water overflowing from the tray 52 and water that has scattered from the cooler 45 without reaching the tray 52; a drainage line 60 located in the intake duct 41 on the upstream side Du where the intake port 41i is located relative to the intake outlet 41o, with respect to the weir 59, and capable of draining water that has accumulated in the intake duct 41 on the upstream side Du where the intake port 41i is located relative to the intake outlet 41o; and a water detector 65 that detects whether water has flowed into the drainage line 60 and is capable of issuing an alarm when it detects that water has flowed into the drainage line 60.

[0064] In this embodiment, the cooling water tank 47, the cooling water supply line 50, the cooling water pump 51, the cooler 45, the tray 52, and the cooling water recovery line 53 constitute a water circulation line. In this embodiment, water circulates within this water circulation line.

[0065] However, depending on the amount of water supplied to the cooler 45, water may overflow from the tray 52. ​​Also, water from the cooler 45 may splash without reaching the tray 52. ​​That is, water may leak from the water circulation line. In this case, water accumulates in the intake duct 41, and the weir 59 prevents the water from flowing downstream of the weir 59 to Dd. Water that accumulates upstream of the weir 59 to Du flows into the drain line 60. In this embodiment, when water flows into the drain line 60, the water detector 65 detects this and issues an alarm. If the cooling water pump 51 is stopped based on this alarm, the supply of water to the cooler 45 stops. Stopping the supply of water to the cooler 45 prevents water from overflowing from the tray 52 and also prevents water from the cooler 45 from splashing without reaching the tray 52.

[0066] Therefore, in this embodiment, it is possible to prevent water from overflowing the weir 59 and being discharged from the intake outlet 41o of the intake duct 41. Furthermore, in this embodiment, it is possible to reduce the consumption of circulating water, which is water flowing in the water circulation line.

[0067] (2) The intake air cooling device 40 in the second embodiment is The intake air cooling device 40 in the first aspect includes a control device 70 that stops the cooling water pump 51 when the water detector 65 issues the alarm.

[0068] In this embodiment, the cooling water pump 51 can be stopped by the control device 70, which reduces the amount of work required by the worker. Furthermore, in this embodiment, the time from when the water detector 65 issues an alarm to when the cooling water pump 51 stops can be made shorter than when the worker stops the cooling water pump 51, thereby reducing the amount of circulating water consumed.

[0069] (3) The intake air cooling device 40 in the third aspect is In the intake air cooling device 40 of the second aspect, after the water detector 65 issues the alarm, when it detects that no water is flowing into the drain line 60, the control device 70 drives the cooling water pump 51.

[0070] In this embodiment, the time during which the cooling water pump 51 is not driven can be minimized.

[0071] (4) The intake air cooling device 40 in the fourth aspect is In the intake air cooling device 40 according to any one of the first to third aspects, the drain line 60 includes a drain pipe 61 into which water accumulated on the upstream side Du of the weir 59 in the intake duct 41 flows and which has a drain outlet 61o through which the water can be drained, a drain pot 62 provided in the drain pipe 61 and capable of temporarily storing water flowing through the drain pipe 61, and a drain valve 63 which is switchable between an open state in which the water accumulated in the drain pot 62 can be drained from the drain outlet 61o and a closed state in which the water cannot be drained from the drain outlet 61o. The water detector 65 is a water meter capable of detecting the amount of water in the drain pot 62.

[0072] In this embodiment, the reliability of detecting whether water is flowing into the drain line 60 can be improved.

[0073] (5) The intake air cooling device 40 in the fifth aspect is In the intake air cooling device 40 in the fourth aspect, after the water detector 65 issues the alarm, a control device 70 is provided which, when it detects that no water is flowing into the drain line 60, opens the drain valve 63 for a predetermined period of time.

[0074] In this embodiment, the water in the drain pot 62 can be drained, and the next time water flows into the drain line 60, it can be prepared.

[0075] (6) The intake air cooling device 40 in the sixth aspect is The intake air cooling device 40 according to any one of the first to fifth aspects includes a plurality of the coolers 45 and a plurality of the trays 52. The plurality of coolers 45 are aligned in the vertical direction.

[0076] (7) The intake air cooling device 40 according to the seventh aspect is The intake air cooling device 40 according to any one of the first to sixth aspects includes a silencer 43 disposed in the intake duct 41 on the downstream side Dd of the weir 59.

[0077] In this embodiment, water can be prevented from overflowing the weir 59 and flowing downstream Dd of the weir 59, thereby preventing a reduction in the sound-absorbing effect of the silencer 43 due to part of the silencer 43 being submerged in water.

[0078] (8) The intake air cooling device 40 in the eighth aspect is In the intake air cooling device 40 in any one of the first to seventh embodiments, a filter 42 is provided in the intake duct 41, positioned upstream Du of the cooler 45, and capable of removing foreign matter contained in the air flowing in from the intake port 41i.

[0079] In this embodiment, the amount of foreign matter in the air passing through the cooler 45 can be reduced, and therefore contamination of the circulating water by foreign matter can be suppressed.

[0080] The gas turbine plants in the above embodiments can be understood, for example, as follows. (9) A ninth aspect of the gas turbine plant includes: The present invention includes an intake air cooling device 40 according to any one of the first to eighth aspects, and a gas turbine GT. The gas turbine GT has a compressor 10 capable of compressing air that has passed through the intake duct 41 to generate compressed air, a combustor 20 capable of burning fuel in the compressed air to generate combustion gas, and a turbine 30 that can be driven by the combustion gas.

[0081] In this embodiment, water can be prevented from overflowing the weir 59 and being discharged from the intake outlet 41o of the intake duct 41, and therefore damage to the compressor 10 caused by water from the intake duct 41 can be prevented.

[0082] The intake air cooling method in each of the above embodiments can be understood, for example, as follows. (10) The intake air cooling method according to the tenth aspect is an intake air cooling method in the intake air cooling device 40 described below. The intake air cooling device 40 includes an intake duct 41 having an intake port 41i capable of sucking in air and an intake outlet 41o through which the air sucked in from the intake port 41i flows out, a cooler 45 arranged in the intake duct 41 and capable of cooling the air by bringing the air that has flowed into the intake duct 41 from the intake port 41i into contact with water, a cooling water tank 47 capable of storing water for cooling, a cooling water supply line 50 that can introduce water from the cooling water tank 47 to the cooler 45, a cooling water pump 51 that is provided in the cooling water supply line 50 and can supply water from the cooling water tank 47 to the cooler 45, and a cooling water pump 51 arranged below the cooler 45 and in front of the cooler 45. The cooling water recovery line 53 is provided with a tray 52 that receives the water used to cool the air in the cooler 45, a cooling water recovery line 53 that can guide the water received by the tray 52 to the cooling water tank 47, a weir 59 that is located within the air intake duct 41 on the downstream side Dd where the air intake outlet 41o is located relative to the air intake port 41i, based on the cooler 45, and that can block water that overflows from the tray 52 and water that splashes from the cooler 45 without reaching the tray 52, and a drainage line 60 that is located within the air intake duct 41 on the upstream side Du where the air intake port 41i is located relative to the weir 59, based on the weir 59, and that can drain water that has accumulated within the air intake duct 41. The intake air cooling method in this intake air cooling device 40 executes a cooling water supply process S1 in which the cooling water pump 51 is driven to supply water in the cooling water tank 47 to the cooler 45, a water detection process S2 in which whether or not water has flowed into the drain line 60 is detected and an alarm is issued if water inflow into the drain line 60 is detected, and a cooling water supply stop process S3 in which the cooling water pump 51 is stopped and the supply of water to the cooler 45 is stopped if the alarm is issued in the water detection process S2.

[0083] In this embodiment, similar to the intake air cooling device 40 in the first embodiment, it is possible to prevent water from being discharged from the intake outlet 41o of the intake duct 41, and it is also possible to reduce the consumption of circulating water, which is the water flowing in the water circulation line.

[0084] (11) An intake air cooling method according to an eleventh aspect includes: In the intake air cooling method of the tenth aspect, in the cooling water supply process S1, after the alarm is issued in the water detection process S2, if it is detected that water is not flowing into the drain line 60, the cooling water pump 51 is restarted to resume the supply of water in the cooling water tank 47 to the cooler 45.

[0085] (12) In a twelfth aspect, an intake air cooling method includes: In the intake air cooling method of the tenth or eleventh aspect, the drainage line 60 includes a drainage pipe 61 into which water accumulated on the upstream side Du of the weir 59 in the intake duct 41 flows and which has a drainage outlet 61o through which the water can be drained, a drainage pot 62 provided in the drainage pipe 61 and capable of temporarily storing water flowing through the drainage pipe 61, and a drainage valve 63 which is switchable between an open state in which the water accumulated in the drainage pot 62 can be drained from the drainage outlet 61o and a closed state in which the water cannot be drained from the drainage outlet 61o. In the water detection step S2, the amount of water in the drainage pot 62 is detected.

[0086] In this aspect, similar to the intake-air cooling device 40 in the fourth aspect, it is possible to improve the reliability of detecting whether water has flowed into the drain line 60 or not.

[0087] (13) In a thirteenth aspect, the intake air cooling method comprises: In the intake air cooling method of the twelfth aspect, after the alarm is issued in the water detection step S2, if it is detected that no water is flowing into the drain line 60, a drain step S5 is executed in which the drain valve 63 is kept in the open state for a predetermined period of time.

[0088] In this embodiment, similarly to the intake air cooling device 40 in the fifth embodiment, the water in the drain pot 62 can be discharged, and preparation can be made for the next time water flows into the drain line 60. [Explanation of symbols]

[0089] GT: Gas turbine GEN: Generator 1: Gas turbine rotor 10: Compressor 11: Compressor rotor 12: Compressor casing 15: Intake casing 20: Combustor 25: Intermediate casing 30: Turbine 31: Turbine rotor 32: Turbine casing 35: Exhaust casing 39: Chimney 40: Intake air cooling device 41: Intake duct 41i: Air intake 41o: Intake outlet 41a:Horizontal part 41ab: Bottom plate 41as: Side plate 41at:Top plate 41b: Transition part 41c: Vertical section 42: Filter 43: Silencer 45:Cooler 46: Partition board 47: Cooling water tank 48: Brow line 49: Blow valve 50: Cooling water supply line 50b: Branch supply line 50m: Main supply line 51: Cooling water pump 52: Tray 53: Cooling water recovery line 53c: Tray connection and collection line 53m: Main recovery line 54: Pure water tank 55: Pure water line 56: Pure water pump 59: Weir 60: Drain line 61: Drainage piping 61o: Drain port 62: Drainage pot 63: Drain valve 65: Water detector 70: Control device A: Air Acom: Compressed air F:Fuel Ar: Axis line Da: Axial direction Dau: Axis upstream side Dad: Downstream of the axis Du: Upstream Dd: downstream side

Claims

1. an intake duct having an intake port capable of sucking air and an intake outlet port through which the air sucked through the intake port flows out; a cooler that is disposed in the air intake duct and that is capable of cooling the air by bringing the air that has flowed into the air intake duct from the air intake port into contact with water; a cooling water tank capable of storing water for cooling; a cooling water supply line that can guide the water in the cooling water tank to the cooler; a cooling water pump provided in the cooling water supply line and capable of supplying water in the cooling water tank to the cooler; a tray disposed below the cooler for receiving water used to cool the air in the cooler; a cooling water recovery line that can guide the water received by the tray to the cooling water tank; a weir that is disposed in the air intake duct downstream of the air intake port relative to the cooler, where the air intake outlet is located, and that is capable of damming up water that overflows from the tray and water that is scattered from the cooler without reaching the tray; a drainage line capable of draining water accumulated in the intake duct on an upstream side of the intake port relative to the intake outlet, where the intake port is located, with the weir as a reference; a water detector that detects whether water has flowed into the drain line and that can issue an alarm when it detects water flowing into the drain line; An intake air cooling device comprising:

2. The intake air cooling device according to claim 1, a control device that stops the cooling water pump when the water detector issues the alarm; Intake air cooling device.

3. The intake air cooling device according to claim 2, When the water detector detects that water is not flowing into the drain line after issuing the alarm, the control device drives the cooling water pump. Intake air cooling device.

4. The intake air cooling device according to claim 1, The drain line is a drainage pipe into which water accumulated on the upstream side of the weir in the intake duct flows and which has a drainage outlet through which the water can be discharged; a drainage pot provided in the drainage pipe and capable of temporarily storing water flowing through the drainage pipe; a drain valve that is displaceable between an open state in which water accumulated in the drain pot can be drained through the drain outlet and a closed state in which the water cannot be drained through the drain outlet; and The water detector is a water meter capable of detecting the amount of water in the drain pot. Intake air cooling device.

5. The intake air cooling device according to claim 4, and a control device that opens the drain valve for a predetermined period of time when it detects that no water is flowing into the drain line after the water detector issues the alarm. Intake air cooling device.

6. The intake air cooling device according to claim 1, The cooling system includes a plurality of the cooling devices, A plurality of the trays are provided, The plurality of coolers are arranged in a vertical direction. Intake air cooling device.

7. The intake air cooling device according to claim 1, a silencer disposed in the intake duct on the downstream side of the weir; Intake air cooling device.

8. The intake air cooling device according to claim 1, a filter disposed in the intake duct on the upstream side of the cooler, the filter being capable of removing foreign matter contained in the air flowing in from the intake port; Intake air cooling device.

9. The intake air cooling device according to any one of claims 1 to 8; A gas turbine, Equipped with The gas turbine includes a compressor capable of compressing air that has passed through the intake duct to generate compressed air, a combustor capable of burning fuel in the compressed air to generate combustion gas, and a turbine that can be driven by the combustion gas. Gas turbine plant.

10. an intake duct having an intake port capable of sucking air and an intake outlet port through which the air sucked through the intake port flows out; a cooler that is disposed in the air intake duct and that is capable of cooling the air by bringing the air that has flowed into the air intake duct from the air intake port into contact with water; a cooling water tank capable of storing water for cooling; a cooling water supply line that can guide the water in the cooling water tank to the cooler; a cooling water pump provided in the cooling water supply line and capable of supplying water in the cooling water tank to the cooler; a tray disposed below the cooler for receiving water used to cool the air in the cooler; a cooling water recovery line that can guide the water received by the tray to the cooling water tank; a weir that is disposed in the air intake duct downstream of the air intake port relative to the cooler, where the air intake outlet is located, and that is capable of damming up water that overflows from the tray and water that is scattered from the cooler without reaching the tray; a drainage line capable of draining water accumulated in the intake duct on an upstream side of the intake port relative to the intake outlet, where the intake port is located, with the weir as a reference; An intake air cooling method for an intake air cooling device comprising: a cooling water supply step of driving the cooling water pump to supply water in the cooling water tank to the cooler; a water detection step of detecting whether water has flowed into the drain line and issuing an alarm when water has flowed into the drain line; a cooling water supply stopping step of stopping the cooling water pump to stop the supply of water to the cooler when the alarm is issued in the water detection step; This is an intake cooling method.

11. The intake air cooling method according to claim 10, In the cooling water supply step, if it is detected in the water detection step that water is not flowing into the drain line after issuing the alarm, the cooling water pump is driven again to resume supply of water in the cooling water tank to the cooler. Intake cooling method.

12. The intake air cooling method according to claim 10, The drain line is a drainage pipe into which water accumulated on the upstream side of the weir in the intake duct flows and which has a drainage outlet through which the water can be discharged; a drainage pot provided in the drainage pipe and capable of temporarily storing water flowing through the drainage pipe; a drain valve that is displaceable between an open state in which water accumulated in the drain pot can be drained through the drain outlet and a closed state in which the water cannot be drained through the drain outlet; and In the water detection step, the amount of water in the drain pot is detected. Intake cooling method.

13. 13. The intake air cooling method according to claim 12, In the water detection step, after issuing the alarm, if it is detected that water is not flowing into the drain line, a drainage step is executed in which the drain valve is kept in the open state for a predetermined time. Intake cooling method.

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