JP6038588B2 - Humidifier, gas turbine equipped with humidifier, and method for remodeling the same - Google Patents

Description

  The present invention relates to a humidifier and a gas turbine including the humidifier.

  Due to increasing interest in environmental problems in recent years, further improvement in performance is required for thermal power generation facilities. Among them, gas turbines have relatively high single unit efficiency, and can achieve high power generation efficiency of 50% or more by improving the heat cycle (eg combined cycle combined with steam turbine), which contributes to CO2 reduction. It is expected that.

  The gas turbine thermal cycle has been continuously improved, and one of them is the HAT (Humid Air Turbine) cycle. The HAT cycle is a type of regeneration cycle that exchanges heat between compressor discharge air and turbine exhaust gas using a regenerative heat exchanger. A humidifier is installed between the compressor and the regenerative heat exchanger to increase the amount of heat recovered by the regenerative heat exchanger. In addition, the output is increased by increasing the flow rate on the turbine side. In addition, the HAT cycle is equipped with an intercooler in the middle of the compressor, and the performance improvement effect by reducing the compression power is also added, so it is possible to achieve a significant performance improvement compared to the normal simple cycle (gas turbine alone). is there. However, the HAT cycle has drawbacks such as a large amount of water consumed by the humidifier and the need to install an intercooler in the compressor.

  In recent years, an AHAT (Advanced Humid Air Turbine) system has been proposed as a cycle that eliminates the drawbacks of these HAT cycles. The AHAT system is a system in which a humidifier that sprays droplets on the compressor intake is provided instead of the intermediate cooler in the HAT cycle, and an economizer and a water recovery device are provided downstream of the regeneration heat exchanger exhaust gas. By adopting such a configuration, water consumption is reduced compared to the HAT cycle, so that high efficiency can be achieved at low cost.

  Here, the performance of the HAT cycle including the AHAT system greatly depends on the performance of the humidifier. Specifically, it is important that the compressor discharge air that has flowed in can be humidified to near saturation. For this reason, a humidifying tower is often used as the humidifier, which includes a packing having a large number of holes and supplies water to the surface of the packing to humidify it. On the other hand, although the humidification performance is inferior to that of the humidification tower, a droplet spray type humidifier capable of humidification with an inexpensive configuration may be used.

  In the case of using a droplet spray type humidifier, it is necessary to achieve both a large amount of droplet spray and securing an evaporation time. As one of the means, it is conceivable that the humidifier is composed of an enlarged portion that enlarges the cross-sectional area in the flow direction and a spray portion that sprays droplets, and a spray device is provided downstream of the enlarged portion. In this case, since the cross-sectional area in the flow direction of the spraying portion is increased by the enlarged portion, it is possible to achieve both increase in the spray amount and securing of the evaporation time by decreasing the main flow velocity. However, if the divergence angle in the enlarged portion (the angle formed by the flow direction distance and the increased amount of the enlarged portion width) is large, the flow may be separated and the flow may flow backward on the outer peripheral side of the spray portion. When the reverse flow occurs, the spray droplets are liable to adhere to the spray device, and the amount of drain generated in the humidifier increases to deteriorate the performance of the humidifier.

  Here, Patent Document 1 describes a backflow suppressing structure in the case of having an enlarged portion and a spray device like the above-described humidifier. Patent Document 1 discloses a technique related to a spray drier for drying a solid solution or a dispersion liquid. A straight body and a spray device are installed upstream of an enlarged portion, and a rectifier is used upstream of the spray device. The backflow with respect to the spray solution is suppressed by adopting the structure. However, since the structure of Patent Document 1 is not intended for a humidifier for a HAT cycle, it cannot be applied to a HAT cycle as it is.

  Patent Document 2 describes a backflow suppression structure for a humidifier having an enlarged portion and a spray device. Patent Document 2 is a patent relating to a humidifier in an air conditioner. In order to suppress disturbance of the flow on the outer peripheral side of the enlarged portion, an independent flow path is provided on the inner peripheral side of the enlarged portion, and a metal mesh, a perforated plate, or the like is provided on the inner peripheral side. The flow velocity at the outer peripheral portion is increased by applying the above resistance.

International Publication WO2007 / 114468 JP 2010-19453 A

  When the structure of Patent Document 1 as a dryer is used as a humidifier for the HAT cycle, there are several problems. First of all, since the spray part exists upstream of the enlarged part, there is a high possibility that the spray amount necessary for improving the performance of the HAT cycle cannot be secured. Further, in Patent Document 1, the range of the divergence angle of the enlarged portion is assumed to be 5 degrees or more and within 20 degrees. However, the distance in the flow direction of the enlarged portion in the humidifier described above is preferably as short as possible from the viewpoint of cost (the enlarged portion is evaporated). Because it does not contribute to securing time). For this reason, in order to achieve cost reduction, it is desirable that it is larger than the spread angle of Patent Document 1. Further, Patent Document 1 does not describe details of the rectifier, but in order to make it applicable even when the spread angle is large, there is a possibility that the backflow cannot be suppressed unless the shape of the rectifier is tuned.

  Even when the structure of Patent Document 2 is used as a humidifier for the HAT cycle, there are some problems. First, a support member for holding an independent inner peripheral flow path is required, but the support member may induce flow disturbance. Furthermore, in the HAT cycle, since the temperature of the working fluid is high and the temperature change is large, a large thermal stress is likely to occur in the support member. For this reason, it is difficult to provide an independent flow path on the inner peripheral side as in Patent Document 2, and it is considered difficult to ensure reliability. Moreover, in patent document 2, the flow direction position of the wire mesh installed in an inner peripheral side flow path or a perforated plate is arbitrary, and the backflow in the expansion part exit of the flow which passes an inner peripheral side is not assumed. On the other hand, when applied to the HAT cycle, it is necessary to sufficiently humidify a large amount of air in order to achieve good performance, and the spread angle of the enlarged portion becomes large. Therefore, when the structure of Patent Document 2 is applied, there is a possibility that a large separation region may be generated at the enlarged portion outlet of the inner peripheral side flow path instead of suppressing the outer peripheral side separation.

  Accordingly, an object of the present invention is to provide a humidifier suitable for application to a HAT cycle.

The present invention relates to an enlarged portion that expands a cross-sectional area in the flow direction of compressed air, a spray device that sprays droplets, a spray portion that evaporates the sprayed droplets, and a drain generated in the spray portion. And a drain recovery hole that recovers the flow path, is disposed on the downstream side of the enlarged portion and on the upstream side of the spraying device so as to cover the entire flow path , and includes a rectification device that rectifies the flow in the mainstream direction. Is a perforated plate having a large number of holes, and when the spraying device and the perforated plate are viewed from the downstream side of the spraying device, the total area in which the holes of the spraying device and the perforated plate overlap is the hole of the perforated plate The total area is less than 50% .

  According to the present invention, it is possible to provide a humidifier suitable for application to a HAT cycle.

1 is a schematic view of a humidifying device according to a first embodiment of the present invention. The cycle lineblock diagram of the gas turbine containing the humidification device of the 1st example of the present invention. The flow direction sectional view of the humidification device in the first example of the present invention. The arrow line view at the time of seeing an upstream from the downstream section of the humidification device in the first example of the present invention. Flow direction sectional drawing of the humidification apparatus in the 2nd Example of this invention. Flow direction sectional drawing of the humidification apparatus in the 3rd Example of this invention. The arrow line view at the time of seeing an upstream from the downstream section of the humidification device in the first example of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the configuration of each embodiment of the present invention described below, since the rectifier is present after passing through the enlarged portion, even if a reverse flow is generated by separation when passing through the enlarged portion, the backflow is significantly suppressed in the spray portion. For this reason, it becomes possible to significantly suppress the amount of drainage generated in the spray section and to improve the performance of the humidifier. Furthermore, since the structure of each embodiment is applicable even when the spread angle of the enlarged portion is as large as 20 deg or more, the flow direction distance of the enlarged portion can be reduced, and an independent flow path is provided in the inner peripheral portion. Since it is not necessary, the cost can be reduced.

Example 1
FIG. 1 shows a schematic diagram of a humidifier in the present embodiment, and FIG. 2 shows a cycle configuration diagram of a gas turbine including the humidifier of the present embodiment. In FIG. 2, the gas turbine cycle of this embodiment includes a generator 6 connected to the shaft 5 and generating electric power, in addition to the gas turbine main body 1 composed of the compressor 2, the combustor 3, the turbine 4 and the shaft 5. The regenerative heat exchanger 7 and the humidifier 8 are configured. The discharged air that has passed through the compressor 2 is supplied to the humidifier 8 through the pipe 21. The humid air that has passed through the humidifier 8 flows into the regenerative heat exchanger 7 via the pipe 22, exchanges heat with the exhaust gas that has passed through the turbine 4 to become high-temperature humid air, and then passes through the pipe 23 to combustor. 3 flows into.

  In the combustor 3, fuel is injected to generate high-temperature and high-pressure combustion gas. This combustion gas becomes exhaust gas after driving the turbine 4 and flows into the regenerative heat exchanger 7 and is finally discharged to the atmosphere via a chimney (not shown). Further, water is supplied to the humidifying device 8 from the water supply device 30 via the supply pipe 31. A part of the supplied water is discharged from the humidifier 8 as drain. This drain returns to the supply pipe 31 via the drain pipe 32 and is used again as spray water in the humidifier 8.

  FIG. 2 shows only the minimum necessary cycle configuration as a gas turbine cycle to which the humidifier of the present invention can be applied. In practice, an intermediate cooler is installed in the middle of the compressor 2 as in the HAT cycle, or a spray cooler is installed at the inlet of the compressor 2 as in the AHAT system, and a mist eliminator and water are provided at the exhaust side of the regenerative heat exchanger exhaust gas. Although a recovery device is often provided, the present invention is naturally applicable to such a cycle configuration. Similarly, the present invention is applicable even when a water treatment device is provided in the middle of the drain pipe 32.

  The humidifier 8 includes an introduction part 81 connected to a pipe 21 for supplying compressor discharge air, an enlargement part 82 for the purpose of slowing the flow and securing a spray region, a spray part 83 for spraying and evaporating droplets, a flow Are composed of a rectifying device 84 for rectifying the liquid, a spraying device 85 for spraying droplets, and a drain recovery hole 86. The spray device 85 is connected to the water supply pipe 31 and the drain collection hole 86 is connected to the drain pipe 32, respectively, and humidifies the main stream by droplet spraying while collecting the drain. In addition, the spread angle θ of the enlarged portion 82 is assumed to be about 30 degrees. From the viewpoint of cost, it is desirable in practice that the spread angle in the enlarged portion is 20 degrees or more.

  In this embodiment, the spray unit 83 is directly connected to the pipe 22 that connects the humidifier 8 and the regenerative heat exchanger 7, but the flow direction cross-sectional area is reduced downstream of the spray unit 83 in order to reduce the diameter of the pipe 22. There is no problem even if a reduction unit is provided. Further, in order to suppress the inflow of spray droplets to the regenerative heat exchanger 7, there is no problem even if a structure having a mist eliminator downstream of the spray section 83 is provided.

  In FIG. 3, the flow direction sectional drawing in the rectifier 84 (AA part) of the humidification apparatus 8 in a present Example is shown. Since the cross section of the pipe 21 is generally circular, in this embodiment, a circular shape is assumed as the cross section of the spray unit 83 and the rectifier 84. By making the cross-sectional shape circular, it is possible to suppress the occurrence of stagnation in the mainstream. Further, as a specific structure of the rectifying device 84, a perforated plate having a large number of holes 87 is assumed. In this embodiment, the hole diameter of the perforated plate is the same throughout. In this embodiment, the holes are assumed to be concentric. However, other arrangement methods (triangular arrangement or the like) can be used as long as the arrangement of the holes does not impede the flow property. In this example, the ratio of the total area of the holes (opening ratio) to the cross-sectional area of the porous plate is assumed to be about 40%.

Next, in FIG. 4, the arrow line view at the time of seeing an upstream from the downstream cross section (BB part) of the spraying apparatus 85 of the humidification apparatus 8 in a present Example is shown. In the present embodiment, as shown in FIG. 4, the spray device 85 is assumed to have a shape including a plurality of nozzle headers and a plurality of spray nozzles installed in each nozzle header. As the shape of the spray nozzle, a one-fluid nozzle that sprays high-pressure water is assumed.
As for the nozzle shape, it is possible to use a two-fluid nozzle that mixes and sprays air and water.

  However, since the two-fluid nozzle needs to supply high-pressure air separately from the compressor outlet or the like, the overall performance of the gas turbine tends to be lower than when the one-fluid nozzle is used. In addition, when a plurality of spray nozzles are provided to perform sufficient humidification as in this embodiment, this tendency becomes more prominent. For this reason, it is desirable to use a one-fluid nozzle as the spray nozzle. FIG. 4 also shows the position of the hole 87 of the rectifier 84. As for the arrangement of the spray device 85, it is desirable that the total area where the spray device 85 and the hole 87 of the rectifier 84 overlap is less than 50% of the total area of the hole 87 of the rectifier 84.

  Here, the specific operation of the gas turbine cycle and the humidifier 8 in the present embodiment will be described. First, the gas turbine 1 in the present embodiment assumes a suction flow rate of 120 kg / s, a pressure ratio of 16, and a combustion temperature of 1300 ° C. The suction air that has passed through the compressor 2 becomes air having a pressure of about 1.5 MPa and a temperature of about 420 ° C., and flows into the humidifier 8 through the pipe 21. In the humidifier 8, high-pressure water having a pressure of about 7 MPa and a temperature of about 40 ° C. is supplied from the spray device 85 to the spray section 83, and the air is cooled to about 200 ° C. by evaporation of the spray droplets.

  The cooled humid air is heat-exchanged with the exhaust gas having a pressure of about 0.1 MPa and a temperature of about 500 ° C. in the regenerative heat exchanger 7, becomes humid air of about 330 ° C., flows into the combustor 3, and then flows into the turbine 4. Then, the turbine 4 is driven. The exhaust gas after passing through the turbine is heat-recovered by heat exchange with the humid air that has passed through the humidifier 8 in the regenerative heat exchanger 7 as described above, and finally discharged as exhaust gas of about 370 ° C.

  Next, details of the flow inside the humidifier 8 will be described. The average flow velocity in the pipe 21 and the introduction part 81 is assumed to be about 50 m / s. The flow that has flowed into the enlarged portion 82 decelerates as the cross-sectional area increases, and flows into the rectifier 84 and the spray portion 83 at an outlet of the enlarged portion 82 with an average flow velocity of about 4 m / s. When passing through the rectifier 84, a pressure loss of about 0.0005 MPa occurs. Droplets having an average diameter of about 30 μm are supplied from the spraying device to the air passing through the spraying section 83, and the mainstream air is cooled by droplet evaporation and then flows into the downstream pipe 22. The residence time is assumed to be about 1.5 seconds so that most of the spray droplets floating in the main stream evaporate.

  In this embodiment, since the spread angle θ of the enlarged portion 82 is large, a large peeling region is generated on the outer peripheral side of the enlarged portion outlet. At this time, if there is no rectifying device 84, the separation region on the outer peripheral side reaches the spray device 85, and a flow on the upstream side in the flow direction occurs in a partial region of the spray device 85. As a result, the droplets sprayed from the spray nozzle return to and adhere to the spray device 85, and a large amount of drain may be generated.

  When the amount of generated drain is predicted by analysis, when there is no rectifier 84, about 45% of spray droplets are drained. By adding the rectifier 84, the drain rate can be reduced to about 30%. As a result, it became possible. That is, it is considered that the performance of the humidifier 8 is improved by adopting the structure of the present embodiment. On the other hand, the pressure loss increases due to the presence of the rectifier 84, but since the pressure loss is sufficiently small, 0.7% or less of the pressure loss generated between the compressor outlet and the combustor inlet, it is considered that there is almost no deterioration in gas turbine performance due to the increase in pressure loss. .

  Further, in this embodiment, the total area where the spray device 85 and the hole 87 of the rectifier 84 overlap is less than 50% of the total area of the hole 87 of the rectifier 84, so that the hole 87 of the rectifier 84 and the spray device 85 are. Are arranged so as not to overlap with the flow direction as much as possible. Such an arrangement has two merits in terms of humidification performance, compared to the case where the hole 87 of the rectifying device 84 and the spray device 85 are substantially overlapped in the flow direction. One is that the local backflow around the spraying device generated when the compressor discharge air that has passed through the perforated plate hits the rectifier can be suppressed.

  The other is related to the relationship between the coarse droplet sprayed from the nozzle and the main flow velocity. Droplets sprayed from the nozzle form a cone shape, but coarse droplets are often located at the outer edge of the cone. At this time, if the flow velocity around the coarse droplet is small, the mass flow rate of the main stream sufficient for the coarse droplet to evaporate is not secured, and further coarse droplets are generated due to collisions between the non-evaporated droplets and the evaporation amount There is a possibility of reducing the amount of water and increasing the amount of drainage. Since the hole 87 and the spraying device 85 are arranged so as not to overlap as much as in this embodiment, a flow having a high flow velocity passes through the outer edge of the cone formed during spraying. It is possible to suppress the amount reduction and the increase of the generated drain amount.

  In particular, as in this embodiment, the total area in which the spray device 85 and the hole 87 of the rectifying device 84 overlap each other with respect to the spray device 85 in which a plurality of nozzle headers and a plurality of spray nozzles are provided in each nozzle header. Is less than 50% of the total area of the holes 87 of the rectifier 84, it is possible to achieve good humidification performance by more uniform water spraying while reducing the amount of generated drain as described above.

  In summary, in this embodiment, the rectifier 84 that rectifies the flow in the mainstream direction is installed on the downstream side of the enlarged portion 82 and the upstream side of the spraying device 85 so as to cover the entire flow path. It is possible to suppress a disturbance such as a backflow generated in the section 82 from reaching the spray section, and it is possible to realize a humidifier suitable for application to the HAT cycle with a small amount of drain generation.

  Further, by arranging the hole 87 of the flow straightening device 84 and the spray device 85 so as not to overlap with each other in the flow direction, local backflow around the spray device can be suppressed. At the same time, the main flow with a large flow velocity passes through the area where the coarse droplets generated during spraying pass, ensuring a sufficient mass flow rate for the coarse droplets to evaporate, and reducing the amount of evaporation due to collisions between unevaporated droplets. And drainage can also be suppressed. Specifically, when the spray device and the porous plate are viewed from the downstream side of the spray device, the total area where the holes of the spray device and the porous plate overlap is less than 50% of the total area of the holes of the porous plate. Thus, it is possible to suppress local backflow around the spraying device that occurs when the compressor discharge air that has passed through the perforated plate collides with the rectifier.

  Compared to Patent Document 1, since the spray device is installed after passing through the enlarged portion 82, spraying at a large flow rate is possible. And since it can apply also when the angle of an expansion part is 20 degrees or more, the full length of a humidification apparatus can be shortened and cost reduction can be achieved. Furthermore, since an independent flow path is not provided on the inner peripheral side compared to Patent Document 2, and a porous plate is fixed to the enlarged portion outlet, a structure that achieves both cost reduction and suppression of peeling at the enlarged portion outlet It becomes possible.

(Example 2)
FIG. 5 shows a cross-sectional view in the flow direction of the rectifier 84 (AA section) of the humidifier 8 in the present embodiment. The difference from the first embodiment is that the diameter of the hole 88 located on the center side of the rectifier 84 is made smaller than the diameter of the hole 87 located on the outer peripheral side. In addition, about the apparatus which overlaps with FIG. 3, the number is the same and detailed description is abbreviate | omitted.

  In the structure of the first embodiment, the flow straightening device 84 suppresses the separation at the spraying portion 83 and the upstream flow with respect to the spraying device 85, but still a slight backflow occurs in the vicinity of the outer peripheral portion of the spraying portion 83. According to this, drainage of about 30% of the spray amount is generated. As a reason why the flow to the upstream side occurs at the outer peripheral portion, it can be considered that the flow distribution is not optimized. Since the separation region generated in the enlarged portion 82 is mainly on the outer peripheral side, the mass flow rate of the main flow at the outlet of the enlarged portion 82 increases as it approaches the central portion, and decreases as it approaches the outer peripheral side.

In the structure of the first embodiment, since the diameters of the holes 87 of the rectifying device 84 are all the same, the flow distribution is not adequately optimized even when passing through the rectifying device 84, and the flow rate on the outer peripheral side is relative to the central portion. Less. In this case, the flow that has passed through the central portion of the rectifying device 84 is diffused in the radial direction (in this case, the outer peripheral side) at the spray portion 83, and induces a flow upstream with respect to the spray device 85 during diffusion.
Thereby, there is a possibility that the reduction of the drain generation amount is hindered.

  Therefore, in this embodiment, the diameter of the hole 88 located on the center side of the rectifier 84 is made smaller than the diameter of the hole 87 located on the outer peripheral side. In general, the smaller the hole diameter, the greater the pressure loss during passage. Therefore, the mainstream air is more likely to flow on the outer peripheral side than on the center. As a result, the flow distribution that is biased toward the central portion is optimized, and the above-described upstream flow can be reduced on the outer peripheral side of the spray portion 83. According to the analysis results, the drainage rate of the spray droplets can be reduced from about 30% to about 5% by setting the diameter of the central hole 88 to about 85% of the diameter of the outer peripheral hole 87. It becomes.

  In this embodiment, since the hole area ratio of the entire rectifier (area ratio of the entire hole to the cross-sectional area of the rectifier) is reduced as compared with the first embodiment, the pressure loss is increased by about 0.0002 MPa. However, as in the first embodiment, the pressure loss generated in the rectifier 84 is sufficiently smaller than the pressure loss generated between the compressor outlet and the combustor inlet, and therefore it is considered that there is almost no deterioration in the gas turbine performance due to the increase in pressure loss.

  In summary, in this embodiment, a porous plate is used as the structure of the rectifier, and the diameter of the hole located on the center side is made smaller than the diameter of the hole located on the outer peripheral side, so that the compressor discharge air is removed by peeling. Is more uniformly supplied to the outer peripheral side of the spraying portion where it is difficult to supply. For this reason, compared with the case where the diameter of the hole of the whole area is simply made the same, evaporation in an outer peripheral part is accelerated | stimulated and it becomes possible to improve the performance of a humidification apparatus.

  Therefore, it can be said that the present embodiment can provide a humidifier that further reduces the amount of drain generation with a slight structural change compared to the first embodiment.

Example 3
FIG. 6 shows a cross-sectional view in the flow direction of the rectifier 84 (AA portion) of the humidifier 8 in the present embodiment. The difference from the first embodiment is that the cross-sectional shape in the flow direction from the downstream portion of the enlarged portion 82 to the spray portion 83 is not a circular shape but a rectangular shape (square shape). In addition, about the apparatus which overlaps with FIG. 3, the number is the same and detailed description is abbreviate | omitted.

  FIG. 7 shows an arrow view when the upstream side is viewed from the downstream cross section (BB portion) of the spray device 85 of the humidifying device 8 in the present embodiment. From FIG. 7, the structure of the present embodiment has two merits with respect to the arrangement of the spray device 85 compared to the first embodiment. The first is that when the holes 87 of the rectifier 84 are spatially arranged at equal intervals, the holes can be arranged in a lattice shape. Accordingly, by appropriately selecting the position of the spraying device 85, the hole 87 of the rectifying device 84 and the spraying device 85 can be arranged so as not to overlap at all in the flow direction as shown in FIG. Problems such as local backflow in the spraying device 85 and a decrease in the evaporation amount due to the collection of unevaporated droplets can be made more difficult to occur.

  Another is that the spatial symmetry of the spray droplets is easily maintained. In general, the shape of the spray device 85 is often a type in which a plurality of nozzles are attached to a straight tube as shown in FIGS. 4 and 7. When this type of spraying device 85 is used, if the cross-sectional shape of the spraying portion 83 is circular as in the first embodiment, it is difficult to spatially arrange the nozzle arrangement in the vicinity of the outer peripheral side, Deviation tends to occur in the evaporation amount. There is a possibility that the non-evaporated droplets locally gather due to the deviation of the evaporation amount and the drain amount increases. On the other hand, in this embodiment, since the cross-sectional shape of the spray portion 83 is rectangular, it is easy to maintain the spatial symmetry of the spray droplets when the linear spray device 85 is used, and the drain amount is reduced. It is thought.

  Further, when the cross-sectional shape is a rectangular shape, the inside of the humidifying device 8 is not a curved surface, so that workability during maintenance is improved. Specifically, it is considered that the replacement of the spray nozzle of the spray device 85 and the like becomes easier than in the first embodiment.

  In summary, it can be said that this embodiment can provide a humidifier that not only reduces the amount of drain generation but also improves maintainability compared to the first embodiment.

  It should be noted that the hole diameter ratio change shown in the second embodiment can also be applied to the rectifier 84 in the present embodiment. In that case, it is possible to provide a humidifier that further reduces the amount of drain generation than in the present embodiment.

  According to the embodiments described above, in a regenerative cycle gas turbine equipped with a regenerative heat exchanger, the present invention relates to a humidifier installed between a compressor and a regenerative heat exchanger for the purpose of increasing the amount of recovered heat. is there. Although the present invention is applied to all HAT cycles, it can also be applied as a modification method for existing regenerative cycle gas turbines.

DESCRIPTION OF SYMBOLS 1 Gas turbine 2 Compressor 3 Combustor 4 Turbine 5 Shaft 6 Generator 7 Regenerative heat exchanger 8 Humidifier 21, 22, 23 Air piping 30 Water supply pump 31, 32 Water piping 81 Introduction part 82 Expansion part 83 Spraying part 84 Rectification Device 85 Spraying device 86 Drain recovery holes 87, 88

Claims (10)

A compressor that compresses and discharges air; a combustor that combusts air and fuel compressed by the compressor to generate combustion gas; and a turbine that is driven by the combustion gas generated by the combustor; The exhaust gas discharged from the turbine is provided in a gas turbine facility including a regenerative heat exchanger that exchanges heat with the compressed air supplied from the compressor to the combustor, and is compressed into the compressed air compressed by the compressor. A humidifier for supplying moisture,
The expansion part which expands a cross-sectional area toward the mainstream direction of the compressed air, the spray device which sprays droplets, the spray part which evaporates the sprayed droplets, and the drain generated in the spray part are collected A drain recovery hole,
Provided on the downstream side of the enlarged portion and the upstream side of the spraying device so as to cover the entire flow path , and includes a rectifier that rectifies the flow in the mainstream direction ,
The rectifier is a perforated plate having a large number of holes,
When the spraying device and the perforated plate are viewed from the downstream side of the spraying device, the total area where the holes of the spraying device and the perforated plate overlap is less than 50% of the total area of the holes of the perforated plate. Humidifying device as a feature. The humidifier according to claim 1,
The cross-sectional shape on the upstream side of the enlarged portion is circular,
The humidifier characterized by the cross-sectional shape of the downstream of the said enlarged part and the said spray part being circular. The humidifier according to claim 1,
The cross-sectional shape on the upstream side of the enlarged portion is circular,
The humidifier characterized by the cross-sectional shape of the said enlarged part downstream side and the said spraying part being a rectangular shape. The humidifying device according to any one of claims 1 to 3,
Humidifying apparatus comprising: a first fluid nozzle for spraying liquid at high pressure as the spray device. The humidifying device according to claim 4 ,
The humidifier characterized by the diameter of the hole located in the center side of the said porous plate being smaller than the diameter of the hole located in the outer peripheral side of the said porous plate. In the humidification apparatus in any one of Claim 1 to 5 ,
A humidifier, wherein the total area of the holes of the porous plate is less than 50% of the cross-sectional area in the flow direction of the porous plate. The humidifier according to claim 1 ,
The humidifying device, wherein the spraying device has a plurality of nozzle headers, and the nozzle header is provided with a plurality of one-fluid nozzles. The humidifying device according to any one of claims 1 to 7 ,
A humidifier characterized in that a spread angle θ of the enlarged portion is 20 deg or more. A compressor that compresses and discharges air; a combustor that combusts air and fuel compressed by the compressor to generate combustion gas; and a turbine that is driven by the combustion gas generated by the combustor; A gas turbine facility comprising a regenerative heat exchanger for exchanging heat between the exhaust gas discharged from the turbine and compressed air supplied from the compressor to the combustor,
A gas turbine facility comprising the humidifier according to any one of claims 1 to 8 as a humidifier for supplying moisture to compressed air compressed by the compressor. A compressor that compresses and discharges air; a combustor that combusts air and fuel compressed by the compressor to generate combustion gas; and a turbine that is driven by the combustion gas generated by the combustor; A regenerative heat exchanger that exchanges heat between the exhaust gas discharged from the turbine and the compressed air supplied from the compressor to the combustor; and a humidifier that supplies moisture to the compressed air compressed by the compressor. A gas turbine equipment modification method comprising:
A method for remodeling gas turbine equipment, wherein the humidifier is replaced with the humidifier according to any one of claims 1 to 8 .