JP2017067027A - Gas turbine storage package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover foreign objects in air at an intake passage and inhibit pressure loss in a gas turbine storage package for storing a gas turbine.SOLUTION: A package for storing a gas turbine 3 includes: a first intake passage 21 which suctions air in the outside from a first intake port 210 and circulates the air to a connection port 211 connected with the gas turbine 3. The first intake passage 21 has a bending part 213 which bends an intake air circulation direction in the vicinity of the upstream side of the connection port 211. A first foreign object recovery part 214 which recovers foreign objects is provided at an outer periphery part of the connection port 211.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a gas turbine storage package.

  Conventionally, a package containing a gas turbine and a generator is installed as an emergency power generator in a building such as a building, underground, on the roof, or outdoors. The package is provided with an intake passage through which external air is drawn from the intake port and flows to a connection port connected to the gas turbine. If foreign matter such as dust is mixed in the air supplied to the gas turbine, an operation failure occurs. Therefore, an air filter or the like is usually provided in the intake passage to remove the foreign matter.

  For example, according to Patent Document 1, in a gas turbine intake system facility, a net is provided at the intake port in order to prevent relatively large foreign objects such as birds and insects from entering the intake pipe. Further, a weather louver is provided on the downstream side of the net to prevent rain or snow from entering the intake pipe. Further, an air filter is provided on the downstream side of the weather louver in order to prevent foreign matters such as dust from entering the intake pipe.

Japanese Patent Laid-Open No. 11-311131

  However, in the technology of Patent Document 1, foreign matters can be prevented from entering the gas turbine by making the air filter particularly fine, but the fuel consumption rate deteriorates because the pressure loss increases. Or, if the air filter is made finer, it is not preferable to design the air filter so that the pressure loss does not increase, because the apparatus becomes larger. Conversely, if the air filter is made coarser, the pressure loss is reduced, but it is not possible to prevent foreign matter from entering the gas turbine.

  An object of the present invention is to suppress pressure loss while collecting foreign matter in the air in an intake passage in a gas turbine storage package for storing a gas turbine.

  A gas turbine storage package for storing a gas turbine includes an intake passage that sucks external air from an intake port and distributes the air to a connection port connected to the gas turbine, and the intake passage is in the vicinity of the upstream side of the connection port. It has a curved part that bends the flow direction of the intake air, and a foreign substance collecting part that collects the foreign substance is provided on the outer peripheral part of the connection port in the intake passage.

  In the gas turbine storage package, the intake passage includes a horizontal passage disposed substantially horizontally and a lower passage that extends downward from the horizontal passage through the curved portion and has the connection port formed at a lower end. The foreign matter collecting portion has a foreign matter collecting wall provided in a substantially vertical direction between an outer peripheral portion of the connection port in the intake passage and the connection port, and an upper end of the foreign matter collecting wall. May be lower than the floor of the horizontal passage.

  Further, in the gas turbine storage package described above, the second foreign matter collecting part may be provided on the floor surface of the intake passage.

  According to the gas turbine storage package, by providing the foreign matter collecting part for collecting foreign matter at the outer periphery of the connection port in the intake passage, pressure loss can be suppressed while collecting foreign matter in the air in the intake passage.

  Further, according to the gas turbine storage package, when the intake passage has a horizontal passage and a lower passage, it is easy to install a foreign matter collecting wall between the outer peripheral portion of the connection port and the connection port in the intake passage. A foreign matter collecting part can be provided in the case. Further, by making the upper end of the foreign matter collecting wall lower than the floor surface of the horizontal passage, light foreign matter contained in the intake air flowing near the floor surface of the horizontal passage can be more reliably collected.

  Further, according to the gas turbine storage package, by providing the second foreign material recovery part on the floor surface of the intake passage, it is possible to recover heavy foreign material rolling on the floor surface of the intake passage.

It is a front view of the power generator of one embodiment. It is a right view of the power generator of one embodiment. It is a longitudinal cross-sectional view of the electric power generating apparatus of one Embodiment. It is an enlarged view of the CD part of FIG. It is the BB sectional view taken on the line of FIG. It is sectional drawing which shows a part of 1st intake passage of another example. It is sectional drawing which shows a part of 1st intake passage of another example. It is sectional drawing which shows a part of 1st intake passage of another example.

  In the following embodiments, as an example of use of a gas turbine storage package, an emergency power generation apparatus in which a gas turbine and a generator are stored in a package will be described as an example. This power generator is installed inside and outside a building such as a hospital. The gas turbine storage package can be widely used at least for a package for storing a gas turbine.

  1 is a front view of the power generation apparatus, FIG. 2 is a right side view of the power generation apparatus, FIG. 3 is a longitudinal sectional view of the power generation apparatus, FIG. 4 is an enlarged view of a portion CD in FIG. FIG. 2 is a cross-sectional view taken along line BB in FIG. 1. FIG. 3 shows a cross section of the package portion. Moreover, in FIG. 3, the arrow has shown the direction through which air flows.

  As shown in FIGS. 1 to 2, the power generation device 1 is covered with a package 2, and as shown in FIG. 3, three sets of gas turbines 3 and a generator 4 are housed inside the package 2. Is done. The power generation apparatus 1 is also provided with other related devices such as a high-pressure panel that can be connected to an external device to supply power generated by a gas supply unit, a gas valve unit, and a generator 4 (not shown). By housing the gas turbine 3 and the generator 4 in the package 2, a soundproof effect can be obtained. Further, when the power generation device 1 is installed outdoors, the package 2 also has a role of protecting the device from rainwater or the like.

  The exterior of the package 2 is composed of a plurality of panels and doors, and is mainly composed of a right housing 2a and a left housing 2b. The right housing 2a of the package 2 includes four doors 20 on the front and two doors 20 on the right side. The gas turbine 3 or the generator 4 can be easily accessed from each door 20 and maintenance can be performed.

  As shown in FIG. 2, on the right side surface of the right housing 2a of the package 2, two first air inlets 210 arranged on the left and right of the upper stage and two second air inlets 220 arranged on the left and right of the middle stage. And two third air inlets 230 disposed on the left and right of the lower stage. The first intake port 210 is an intake port for taking in combustion air for the gas turbine 3, and the second and third intake ports 220 and 230 are intake ports for taking in cooling air for the gas turbine 3 and the generator 4. It is. A net is attached to each intake port to prevent relatively large foreign objects from entering. For example, the mesh pitch can be 10 mm, and the mesh size can be about 8 mm. According to this net, foreign matters having a diameter of about 9 mm or more (about 3 g in terms of iron) can be captured.

  A first exhaust port 240 for exhausting the exhaust from the gas turbine 3 to the outside is provided in the upper part of the left side surface of the left housing 2 b of the package 2. A second exhaust port 250 for exhausting cooling air for the gas turbine 3 and the generator 4 is provided on the upper surface of the package 2. A net is attached to the second exhaust port 250 in the same manner as each intake port.

  As shown in FIG. 3, the package 2 is partitioned by a partition wall, the first intake passage 21 in the upper stage, the second intake passage 22 in the middle stage, the equipment storage chamber 23 in the lower stage, and the left side of the equipment storage room 23. A second exhaust passage 25 is disposed above one exhaust passage (not shown), the first intake passage 21, and the equipment storage chamber 23. The first exhaust passage is formed in the left housing 2 b of the package 2.

  The first intake passage 21 is a cylindrical air passage, and has a first intake port 210 for sucking external air at one end and three connection ports 211 (see FIG. 5) connected to the gas turbine 3 at the other end. 5) is formed. The first intake passage 21 sucks external air from the first intake port 210 and distributes it into the gas turbine 3 through the connection port 211. As shown in FIG. 5, a part of the first intake passage 21 is partitioned by a partition wall 212 into a front-side passage and a back-side passage.

  The first intake passage 21 has a curved portion 213 that bends the flow direction of intake air. The first intake passage 21 includes a horizontal passage 21a disposed substantially horizontally on the upstream side in the flow direction of the intake air of the curved portion 213, and extends downward from the horizontal passage 21a via the curved portion 213 and has a connection port at the lower end. And a lower passage 21b in which 211 is formed.

  The first intake passage 21 is provided with first and second foreign matter collection units 214 and 215 that collect foreign matters contained in the intake air. Details of the first and second foreign matter collection units 214 and 215 will be described later.

  The second intake passage 22 is a cylindrical air passage, and a second intake port 220 for sucking external air is formed at one end, and a radiator 221 is disposed at the other end connected to the device storage chamber 23. . The second intake passage 22 draws external air from the second intake port 220 and distributes it to the device storage chamber 23 through the radiator 221.

  The equipment storage chamber 23 stores three sets of the gas turbine 3 and the generator 4 arranged side by side. In the device storage chamber 23, a third intake port 230 for sucking outside air is formed in the right panel, a connection port 231 connected to the first exhaust passage is formed in the left panel, and a second exhaust passage is formed in the upper partition. A connection port 232 connected to 25 is formed. The exhaust pipe 31 of the gas turbine 3 is inserted through the connection port 231. The device storage chamber 23 circulates the air sucked from the second intake passage 22 and the third intake port 230 and discharges it to the second exhaust passage 25 through the connection port 232.

  The gas turbine 3 burns a mixture of compressed air and fuel gas, and obtains rotational power by high-temperature and high-pressure combustion gas generated at that time, and includes a compressor, a combustion chamber, and a turbine. One end of an intake pipe 32 is connected to the compressor. On the other hand, the other end of the intake pipe 32 is connected to the connection port 211. The generator 4 is connected to the output shaft of the gas turbine 3 and generates power by the rotational power transmitted from the output shaft. The gas turbine 3 and the generator 4 are supported on a common platform 234 disposed on the base 233 through vibration isolation rubber.

  In the first exhaust passage, a connection port (not shown) through which the exhaust pipe 31 is inserted is formed at one end, and a first exhaust port 240 is formed at the other end. The first exhaust passage circulates the exhaust from the exhaust pipe 31 and discharges it from the first exhaust port 240 to the outside.

  In the second exhaust passage 25, a fan 251 is disposed at one end connected to the connection port 232 of the device storage chamber 23, and a second exhaust port 250 is formed at the other end connected to the outside. The portion of the second exhaust passage 25 where the fan 251 is disposed branches into two cylindrical passages (see FIG. 5), and the fan 251 is disposed in both passages. The second exhaust passage 25 circulates the air sucked from the device storage chamber 23 by driving the fan 251 and discharges it from the second exhaust port 250 to the outside.

  Next, the operation of the power generator 1 will be described. The gas turbine 3 is started by mixing fuel gas and air with a mixer (not shown). When the compressor of the gas turbine 3 is operated, a negative pressure is generated in the first intake passage 21. Thereby, outside air is taken in from the first intake port 210 and supplied to the compressor through the first intake passage 21 and the intake pipe 32. The air compressed by the compressor is mixed with fuel gas in the combustion chamber and burned, and the turbine is rotated by the high-temperature and high-pressure combustion gas. This rotational power is transmitted to the generator 4 via the output shaft, and is used for power generation by the generator 4.

  And the combustion gas which passed the turbine is discharged | emitted outside through the exhaust pipe 31 and the 1st exhaust passage. Further, the fan 251 is appropriately driven during the operation of the power generation device 1. By driving the fan 251, external air is taken in from the second air inlet 220 and the third air inlet 230. The air taken in from the second intake port 220 flows through the second intake passage 22 and is supplied to the device storage chamber 23 through the radiator 221. On the other hand, the air taken in from the third intake port 230 is directly supplied to the device storage chamber 23. The air supplied to the device storage chamber 23 absorbs heat from the gas turbine 3 and the generator 4. The heated air is guided to the second exhaust passage 25 by the fan 251 and is discharged to the outside from the second exhaust port 250.

  Next, the details of the first and second foreign matter collection units 214 and 215 will be described with reference to FIG. The first and second foreign matter collecting units 214 and 215 collect small foreign matter (for example, foreign matter having a diameter of less than 9 mm) in the intake air that has entered the first intake passage 21 without being collected by the net of the first intake port 210. To do.

  The air sucked from the first air inlet 210 flows horizontally along the horizontal passage 21 a, bends downward along the lower passage 21 b, and is guided to the intake pipe 32 through the connection port 211. At this time, the heavy foreign matter contained in the air falls in the middle of the horizontal passage 21a and proceeds so as to roll on the floor surface of the horizontal passage 21a (see arrow E in FIG. 4). The second collection unit 215 collects such heavy foreign matter by depositing it. Here, the heavy foreign matter refers to a foreign matter of 1 g or more, for example.

  On the other hand, among the foreign matters contained in the air, the light foreign matter that has not fallen into the horizontal passage 21a is the direction in which the inertial force of the foreign matter acts when the intake air is bent downward along the lower passage 21b, that is, substantially horizontal It falls while proceeding in the direction (see arrow F in FIG. 4). The 1st collection part 214 collects by depositing such a light foreign matter. The light foreign matter here refers to a foreign matter of less than 1 g, for example.

  The first and second foreign matter collecting sections 214 and 215 have the following shapes and arrangements so that foreign matters can be collected in this way.

  The first foreign matter collecting unit 214 is provided on the downstream side of the curved portion 213 in the flow direction of the intake air in the first intake passage 21 and in the direction of the inertial force acting on the foreign matter in the intake air. In other words, it can be said that the first foreign material recovery part 214 is provided on the outer peripheral part on the downstream side of the curved part 213 in the first intake passage 21. For example, the first foreign matter recovery unit 214 is connected to the wall surface 216 corresponding to the outer peripheral portion on the downstream side of the curved portion 213 in the wall surface of the lower passage 21b (in the direction of inertial force acting on foreign matter in the intake air). Provided between the mouth 211. By providing the first foreign material recovery part 214 on the side opposite to the horizontal passage 21a of the connection port 211, the first foreign material recovery part 214 is unlikely to become resistance to the flow of intake air.

  Further, from the viewpoint of the collection rate of foreign matter, the first foreign matter collection unit 214 is preferably provided over the entire width direction in the first intake passage 21 (direction perpendicular to the flow direction of intake air).

  The first foreign matter collection unit 214 has a foreign matter collection wall 217 provided in a substantially vertical direction so as to face the wall surface 216 between the wall surface 216 and the connection port 211. For example, as shown in FIG. 4, the foreign matter collection wall 217 is formed of an angle (light mountain shape steel). According to such a configuration, the first foreign matter collecting part 214 is formed between the wall surface 216 and the foreign matter collecting wall 217. As shown in FIG. 3, the left side of the wall surface 216 is a space for disposing the second exhaust passage 25, so that the first foreign matter collecting unit 214 can be enlarged by moving the wall surface 216 leftward. it can. In addition, as long as the foreign material collection | recovery wall 217 has a substantially perpendicular | vertical wall part, there will be no limitation in the shape, and members of various shapes, such as a channel (light groove shape steel), can be used.

  The upper end of the foreign matter collecting wall 217 is preferably lower than the floor surface of the horizontal passage 21a. That is, it is preferable that the 1st foreign material collection | recovery part 214 is provided in a position lower than the horizontal channel | path 21a. Since the light foreign matter that has not fallen into the horizontal passage 21a falls while proceeding in a substantially horizontal direction as shown by the arrow F, the horizontal passage 21a is provided by providing the first foreign matter collection unit 214 at a position lower than the horizontal passage 21a. It is possible to collect more reliably without blocking light foreign substances contained in the intake air flowing in the vicinity of the floor surface.

  Note that a plurality of first foreign matter collection units 214 may be provided. Further, a foreign matter collecting wall 217 may be provided over the entire circumference of the connection port 211. As a result, the foreign matter recovery rate can be further improved.

  Next, the second foreign matter collection unit 215 is provided on the floor surface in the first intake passage 21. For example, the second foreign material recovery unit 215 is provided on the floor near the curved portion 213. By providing the second foreign matter collection unit 215 closer to the downstream side of the first intake passage 21, heavy foreign matter contained in the air will fall before the second foreign matter collection unit 215, so that the foreign matter can be more reliably removed. It can be recovered.

  From the viewpoint of the collection rate of foreign matter, the second foreign matter collection unit 215 is preferably provided over the entire width direction in the first intake passage 21 (direction perpendicular to the flow direction of intake air). Further, as shown in FIG. 4, the second foreign matter collecting part 215 is provided on the inclined surface of the lower passage 21 b on the downstream side of the curved part 213, so that it is difficult for resistance to flow of the intake air.

  For example, as shown in FIG. 4, the second foreign material recovery unit 215 is formed of a channel. As long as the second foreign material recovery part 215 has a substantially vertical wall part, the shape thereof is not particularly limited, and members of various shapes such as angles can be used. Note that a plurality of second foreign matter collection units 215 may be provided.

  As described above, the first and second foreign matter collection units 214 and 215 collect foreign matter in the intake air to prevent the entry of foreign matter into the gas turbine 3 and hardly inhibit the flow of the intake air. The pressure loss in the intake passage 21 is suppressed and does not cause deterioration of the fuel consumption rate. Therefore, the fuel consumption rate can be improved and the fuel cost can be suppressed as compared with the case where an air filter is used as in the prior art. Further, the periodic replacement work of the air filter is not required, and maintenance is facilitated.

  The first and second foreign matter collection units 214 and 215 can be applied to other forms than the package 2 described above. With reference to FIGS. 6-8, the other example of the package which can apply the 1st and 2nd foreign material collection | recovery parts 214 and 215 is demonstrated.

  FIG. 6 is a cross-sectional view showing a part of another example of the first intake passage. The first intake passage 5 has a curved shape. The first intake passage 5 has a curved portion 53 that bends the flow direction of intake air. The first intake passage 5 has a horizontal passage 5a disposed substantially horizontally on the upstream side of the curved portion 53 in the flow direction of the intake air, and extends downward while curving from the horizontal passage 5a via the curved portion 53. And a lower passage 5b in which a connection port 51 is formed. The first intake passage 5 is provided with first and second foreign matter collection units 214 and 215.

  FIG. 7 is a cross-sectional view showing a part of another example of the first intake passage. The first intake passage 6 has a substantially T shape. The first intake passage 6 has a curved portion 63 that bends the flow direction of intake air. The first intake passage 6 has a horizontal passage 5a arranged substantially horizontally and a lower passage that branches off in the middle of the horizontal passage 6a and extends downward through the curved portion 63 and has a connection port 51 formed at the lower end. 5b. The first intake passage 5 is provided with first and second foreign matter collection units 214 and 215.

  FIG. 8 is a cross-sectional view showing a part of another example of the first intake passage. The first intake passage 7 has a step shape. The first intake passage 7 has two curved portions 73 and 74 that bend the flow direction of the intake air. The first intake passage 7 includes a horizontal passage 7a arranged substantially horizontally, a lower passage 7b extending downward from the horizontal passage 7a via a curved portion 73, and a horizontal extension extending substantially horizontally from the lower end of the lower passage 7b. It comprises a passage 7c and a lower passage 7d extending downward from the horizontal passage 7c via a curved portion 74 and having a connection port 71 formed at the lower end. The first intake passage 7 is provided with two first and second foreign matter collection units 214 and 215, respectively.

  Even in the first intake passage having the form as shown in FIGS. 6 to 8, foreign matters in the intake air can be collected to prevent foreign matters from entering the gas turbine, and pressure loss in the first intake passage can be suppressed. it can.

  Moreover, you may provide the hood which covers the outer side of the 1st-3rd inlet ports 210,220,230 as another form. The hood has an opening at the lower end and is sucked from here. By sucking upward from the lower end of the hood, the foreign matter must rise against the gravity, so that the foreign matter is less likely to be mixed into the intake air. The hood also serves as a rain guard when installed outdoors.

  In each of the above embodiments, the curved portion of the first intake passage is shaped to bend the passage downward from the horizontal direction. However, the bending direction is not particularly limited, for example, the shape is bent from the horizontal direction upward or left and right. It may be a shape bent from the vertical direction to the horizontal direction. Since the first intake passage has at least one such curved portion, the direction of the inertial force acting on the foreign matter does not coincide with the flow direction of the intake air, so that the foreign matter deviates from the flow direction of the intake air. By disposing the first foreign matter collecting portion on the direction of inertial force (outer peripheral portion on the downstream side of the curved portion in the intake passage), the foreign matter can be efficiently collected while suppressing the pressure loss in the first intake passage.

1 Power generator 2 Package (Gas turbine storage package)
21 First intake passage (intake passage)
21a Horizontal passage 21b Lower passage 210 First intake port (intake port)
211 Connection Port 213 Curved Portion 214 First Foreign Object Collection Unit (Foreign Material Collection Unit)
215 Second foreign matter recovery part 216 Wall surface 217 Foreign matter recovery wall

Claims (3)

In the gas turbine storage package for storing the gas turbine,
It has an intake passage that sucks external air from the intake port and distributes it to the connection port connected to the gas turbine,
The intake passage has a curved portion that bends the flow direction of intake air in the vicinity of the upstream side of the connection port,
A gas turbine storage package, characterized in that a foreign matter collecting portion for collecting the foreign matter is provided on an outer peripheral portion of the connection port in the intake passage. The intake passage includes a horizontal passage disposed substantially horizontally, and a lower passage that extends downward from the horizontal passage through the curved portion and has the connection port formed at a lower end thereof.
The foreign matter recovery part has a foreign matter recovery wall provided in a substantially vertical direction between the outer peripheral part of the connection port and the connection port in the intake passage,
The gas turbine storage package according to claim 1, wherein an upper end of the foreign material recovery wall is lower than a floor surface of the horizontal passage.   3. The gas turbine storage package according to claim 1, wherein a second foreign matter collecting portion is provided on a floor surface of the intake passage.

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