JP6157236B2 - Hot water spray device - Google Patents

Description

  The present invention relates to a spray device that sprays hot water into the intake air of a gas turbine compressor.

  In a gas turbine power generation system, it is known that the amount of air taken in by a compressor, that is, the amount of intake air, decreases under the condition that the atmospheric temperature rises such as in summer, and the power generation output also decreases accordingly. As one of means for suppressing a decrease in power generation output accompanying an increase in atmospheric temperature, there is a technique disclosed in Patent Document 1, for example. Specifically, a technique is disclosed in which high-pressure water is sprayed from a high-pressure one-fluid atomizing nozzle for gas turbine increase output during intake of the compressor to lower the intake temperature of the compressor and increase the intake density. Therefore, the present invention provides a high-pressure one-fluid atomizing nozzle that is small in size and has minimal system loss and can atomize a large amount of water into fine water droplets. Here, reducing the system loss means selecting a single fluid spray instead of a two fluid spray that can further liquefy the droplets but increases the loss of compressed air power, while rotating at high speed. An object of the present invention is to provide a spray nozzle capable of forming fine droplets in order to suppress erosion of a compressor blade.

  Conventionally, in intake air cooling, room temperature water was generally used because of the concept of cooling, but with a one-fluid spray nozzle the average Sauter average particle size of about 20 μm is the minimum, and compressor blade erosion is reduced. In order to perform efficient cooling while suppressing and increase the amount of cooling, further refinement of droplets has been required.

As a means for further refinement of droplets using a single fluid spray nozzle, there is a technique disclosed in Patent Document 2.
This is not a conventional high-pressure water at normal temperature, but is sprayed into the intake air at the atmospheric pressure level inside the intake duct upstream of the compressor as high-pressure hot water, so that the droplets are refined by the reduced pressure boiling effect, A method is described in which intake air cooling is performed by heat of vaporization at the time of boiling under reduced pressure.

JP 2004-150409 A WO2012 / 025967

  Unlike conventional high-pressure water spray using normal temperature water, in the case of spray using high-pressure hot water of about 100 ° C to 150 ° C boiling under reduced pressure at atmospheric pressure, the temperature of the intake air is increased by transferring heat from the hot water pipe to the intake air. It becomes a subject to prevent the temperature fall of the warm water which boils under reduced pressure. In particular, since the intake duct (cross-sectional area) of the gas turbine power generation system is large, in order to increase the amount of humidification by spraying, it was necessary to place a spray nozzle in the cross-section of the flow path, which caused the flow path to narrow . Since the amount of cooling can be increased more than before by fine spraying with high-pressure hot water, the number of spray nozzles increases, and when providing the spray nozzles inside the intake duct, it is also a problem that the intake passage resistance is not increased.

  An object of the present invention is to provide a hot water spray device that efficiently lowers the intake temperature of a gas turbine compressor and suppresses an increase in the flow resistance of the intake duct.

  The inventors of the present invention conducted comprehensive studies on the shape of the intake duct of the gas turbine compressor and the entire intake system in order to select the location of contact between the hot water and the intake air and the intake duct and the spray nozzle. From the inlet of the intake duct that takes in outside air to the end of the intake duct from the compressor to the compressor, it is usually not a straight line but a bent intake duct. A filter for removing dust and dust in the atmosphere is provided at the inlet of the intake duct, and a silencer is provided downstream thereof. The intake duct downstream of the silencer is bent at least once and connected to the compressor inlet. In such an air intake duct, a flow path from the silencer to the compressor inlet can be cited as an appropriate place for installing the spray nozzle.

  In order to prevent the temperature rise of the intake air due to heat transfer from the hot water hot water piping to the intake air and the temperature drop of the hot water boiling under reduced pressure at the appropriate place where the spray nozzle is installed, the hot water piping outside the intake duct In addition, it was determined that a configuration in which a spray nozzle is provided in the hot water pipe and the warm water of the spray nozzle is sprayed into the intake duct through the spray hole provided in the wall surface of the intake duct.

More specifically, a hot water pipe is installed outside the bent part of the intake duct and sprays into the air flow inside the intake duct to inject fine droplets. It is the structure connected through the polytetrafluoroethylene and silicon member which have the property.

  With the above configuration, in the present invention, heat transfer from the hot water pipe to the intake air can be avoided, and a large amount of fine droplets can be sprayed into the intake air while maintaining the hot water temperature. Further, the flow resistance in the intake duct is not increased by the spray nozzle itself. As a result, the temperature of the air flowing through the intake duct can be lowered by the heat of vaporization of the high-temperature water, and the intake flow rate in the gas turbine compressor increases even when the atmospheric temperature rises in summer, etc. Can be increased.

According to the present invention, it is possible to provide a hot water spraying device suitable for lowering the intake temperature of a gas turbine compressor.

Ru configuration diagram der hot water spraying device. It is a change figure of the Sauter average particle size by water temperature. It is explanatory drawing of the principle of refinement | miniaturization of the spraying droplet by reduced pressure boiling. Ru configuration diagram der hot water spraying device. Ru intake duct connection diagram der hot water spray nozzle. Ru intake duct connection diagram der hot water spray nozzle. . It is an intake duct connection diagram of a hot water spray nozzle (Example 1 ). It is an intake duct connection diagram of a hot water spray nozzle (Example 2 ).

  The basic components of a gas turbine power generation system are a compressor that compresses air sucked from an intake duct, a combustor that combusts air and fuel compressed by the compressor, and combustion generated by the combustor. A turbine driven by gas.

  Hereinafter, a basic concept common to the embodiments of the present invention to be described in detail will be described.

In a compressor that compresses air, high-pressure hot water is sprayed and mixed into the compressor inlet air in order to lower the air temperature to the atmospheric temperature or lower in the intake duct that sucks air or upstream of the intake duct. Here, the high-pressure hot water may be generated by using exhaust heat in the gas turbine power generation system or by heating water with another heat collecting device and supplying the water to the intake duct. In general, it is known that the air temperature at the inlet of the compressor can be lowered even with water spray at normal temperature, but inside the compressor, which is a high-speed rotating machine, water droplets and the like are not formed, but it is possible to quickly vaporize the spray water and It is desirable from the viewpoint of equipment reliability (rotary machine balance). From this point of view, the present invention is characterized by spraying hot water that is apparently opposite to the purpose of lowering the compressor inlet air temperature. That is, taking advantage of the fact that about 70 to 80% of the amount of heat of high-pressure hot water is vaporization latent heat, the pressure is rapidly reduced from the high pressure state (inside the spray nozzle) to the atmospheric pressure state (inside the intake duct upstream of the compressor). Boil the hot water under reduced pressure. In this case, in normal temperature water, the endothermic effect due to the latent heat of vaporization causes the temperature to become below freezing, and it is easy to freeze at the inlet of the compressor. . Therefore, as in the present invention, it takes the form of spraying as high-pressure hot water so that atomization is promoted during boiling under reduced pressure.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

The embodiments of the present invention will be described with reference to Figures 1-8. The whole structure of the Example of the warm water spraying apparatus to which this invention is applied is demonstrated based on FIGS. 1-6, Example 1 and Example 2 of this invention are demonstrated based on FIG.7 and FIG.8.

  FIG. 1 is a configuration diagram of a hot water spray device provided in an intake duct 1 located on the upstream side of a compressor of a gas turbine power generation system.

  In FIG. 1, the hot water spraying apparatus of the present embodiment includes a hot water pipe 3 provided outside the intake duct 1 and a spray nozzle 4 connected to the hot water pipe 3, and is directed toward the inside of the intake duct 1 through which air 2 flows. The spray nozzle 4 for spraying hot water from the wall surface of the intake duct 1 is connected to the outer surface of the intake duct 1. The hot water pipe 3 is constructed by applying a heat insulating material to the outer surface of a member having a heat insulating effect or a metal pipe. The number of spray nozzles 4 is determined by the flow rate of air 2 to be cooled and the degree of temperature drop based on the spray nozzle performance to be used. Since the flow rate of the air 2 taken in by the gas turbine compressor is as large as several tens kg / s to several hundred kg / s, the intake duct passage area is also large. In order to cool the air 2 having a large flow rate as a whole, tens to hundreds of spray nozzles 4 are installed.

In addition, the hot water spraying apparatus of a present Example is not only applied to a newly installed gas turbine system, but a hot water spraying apparatus can be additionally installed as a modification method of the existing gas turbine system. In this case, a hot water pipe is arranged outside the intake duct, a spray nozzle is connected to the hot water pipe, a spray hole is formed in the wall surface of the intake duct, and the pressure is reduced from the spray nozzle to the inside of the intake duct through the spray hole. This can be realized by configuring the hot water spraying apparatus so as to spray hot water refined by boiling.
(Action / Effect)
Next, the operation of the embodiment of FIG. 1 will be described.

  In the present embodiment, the heat source that generates the hot water is not specified, but the use of exhaust heat in the gas turbine power generation system, a separate solar heater, or the like is assumed.

  In this embodiment, the operation at a water pressure of 7 MPa and a water temperature of 130 ° C. will be described as an example of the hot water condition. Pressurized hot water in a hot water pipe 3 installed outside the intake duct 1 and constructed by a heat insulating material is supplied to a plurality of spray nozzles 4 and is supplied to the intake duct 1 through spray holes on the wall surface of the intake duct 1. Is sprayed as a spray 5 (a group of fine droplets). The spray 5 merges with the air 2 flowing inside the intake duct 1, and the air 2 is cooled by the heat of vaporization that evaporates after the fine droplets are sprayed, and the temperature of the air 2 becomes lower than the outside air temperature. The air 2 having a temperature lower than the outside air temperature flows into the compressor in the downstream of the intake duct 1.

FIG. 2 is a graph showing experimental results of Sauter average particle size change depending on water temperature. The Sauter average particle diameter is an average particle diameter weighted by the square of the droplet diameter, and is the most frequently used index as a method for organizing the droplet diameter in a heat or mass transport process. As the Sauter average particle size is smaller, evaporation in the air is promoted, and the air can be efficiently cooled. Fig. 2 shows the result of measuring the particle size after spraying with a phase Doppler particle size measuring device using a laser. The horizontal axis is the particle size (μm), and the vertical axis is the particle count (measured number). This is a comparison of the particle size distributions when the water temperature and water pressure are the same at the same measurement point of the same spray nozzle and the water temperature is raised to room temperature and 130 ° C. From this, the average particle size of 26.3 μm at normal temperature has decreased to 15.6 μm of average particle size at 130 ° C., and the entire particle size distribution has shifted to a smaller particle size side. It can be seen that the drops are reduced. From this, it was found that by spraying the high-pressure hot water, the droplets were refined by the reduced pressure boiling effect, and the air 2 in the intake duct 1 could be efficiently cooled.
(Principle of droplet miniaturization by boiling under reduced pressure)
Next, the principle of atomization of spray droplets by vacuum boiling will be described in detail with reference to FIG.

  In this embodiment, the temperature of the spray water supplied to the spray device is set to be equal to or higher than the boiling point of water at the pressure (atmospheric pressure) of the air 2 supplied to the compressor, and the high-pressure hot water 6 is atomized by boiling under reduced pressure. The fine droplets 7 generated thereby are sprayed inside the intake duct 1. By using the high-pressure hot water 6, when the spray water temperature is sprayed under conditions higher than the boiling point of water at the ambient pressure after spraying, the decompression in which bubbles are generated in the spray 5 immediately after the spray nozzle 4 is discharged. Boiling occurs, and the droplets are further atomized to become fine droplets 7. When the droplets are atomized, evaporation of the droplets into the air 2 is accelerated, and a cooling effect due to evaporation of the droplets can be obtained in a short time.

From the viewpoint of droplet evaporation, generally, the higher the temperature of the droplet, the faster the droplet evaporates. When droplets evaporate in the compressor, the closer to the compressor inlet, the more the cooling effect associated with the evaporation will be reflected in the subsequent stage, and the power reduction effect will increase, improving the efficiency of the gas turbine power generation system. To do. The temperature of the air 2 flowing through the intake duct 1 can be lowered by the hot water spray device of this embodiment.
(Features of this embodiment)
In this embodiment, since the high-pressure hot water 6 used for spray water is supplied from the outside of the intake duct 1, the air 2 can be efficiently cooled without heating the air 2 inside the intake duct 1 with hot water, Since the spray device is located outside the intake duct 1, there is an advantage that the spray nozzle 4 can be easily maintained and managed. Moreover, since the spraying apparatus of the present embodiment refines the droplets by boiling under reduced pressure, no special spraying device is required for generating the fine droplets 7.

Next, the definitive configuration to an embodiment of the present invention by FIG.

Figure 4 is a block diagram of the hot water spraying device, in addition to the spray nozzle provided at the embodiment of Figure 1 (reference numeral 4b in Fig. 4), even before and after the intake duct corners 8 of the intake duct 1 A spray nozzle (reference numerals 4a and 4c) is provided. This is because the spray 5 from the spray nozzles 4 a and 4 c is sufficiently mixed with the air 2 using the stirring flow 9 generated in the air 2 flowing inside the intake duct corner portion 8. FIG. 4 is an example in which three spray nozzle groups are roughly arranged in the S-shaped intake duct 1.
(Action / Effect)
Next, the operation of the embodiment of FIG. 4 will be described.

  Spray droplets from the spray nozzle 4a provided in the uppermost stream of the intake duct 1 are mixed with the air 2 by the stirring flow 9a immediately downstream, and the spray nozzle 4b provided in the second position of the intake duct 1 The air 2 is mixed by the stirring flow 9a and the downstream stirring flow 9b. The spray 5 of the spray nozzle 4c provided at the most downstream of the intake duct 1 is promoted to be mixed with the air 2 by the upstream stirring flow 9b.

  In FIG. 4, the spray nozzle group 4 is provided in three places in a plane, but the spray nozzle 4 can be provided also from the vertical direction of the drawing to further promote the mixing of the air 2 and the spray 5. That is, the installation position of the spray nozzle 4 and the number of spray nozzles 4 may be arbitrarily changed according to the shape of the intake duct 1.

  According to this embodiment in which the spray nozzles are arranged immediately upstream and immediately downstream of the bent portion of the intake duct, the spray 5 from the spray nozzle 4 is mixed with the air 2 using the stirring flow 9 generated in the intake duct 1. Therefore, a device for mixing the spray 5 and the air 2 becomes unnecessary. Further, since all the spray nozzles 4 are arranged outside the intake duct 1, there is an advantage that maintenance of the spray nozzles 4 is easy.

Next, it will be described with reference to FIG. 5 the configuration in Example of the present invention.

Figure 5 is a block diagram of the hot water spraying device, that is provided in a zigzag manner on the linear portion of the Oite, a plurality of intake spray nozzle 4 groups duct 1 to the embodiment of the Example and Figure 2 in FIG. 1 Features. In the illustrated example, when the intake duct 1 is viewed in the plane direction, the spray nozzle 4d disposed on a certain duct wall surface 1d side, and the spray nozzle 4e disposed on the duct wall surface 1e side facing the duct wall surface 1d, Are staggered (alternately). That is, the sprays 5d and 5e from the spray nozzles 4d and 4e are arranged at positions where they do not collide with each other. FIG. 5 shows an example in which three spray nozzles 4 d and 4 e are arranged on the opposite side of the intake duct 1.
(Action / Effect)
Next, the operation of the embodiment of FIG. 5 will be described.

  The spray 5d from the spray nozzle 4d provided in the uppermost stream on one side 1d of the intake duct 1 penetrates the air 2 and promotes mixing with air. The spray nozzle 4e provided on the uppermost stream on the other surface 1e of the intake duct 1 (the surface of the lower intake duct 1 in FIG. 5) does not collide the spray 5e from the spray nozzle 4e with the facing spray 5d. Provided in position. By following the positional relationship of the spray nozzles 4d and 4e provided on the opposite surfaces of the intake duct 1, the spray nozzles 4d and 4e are arranged in an alternating arrangement or a staggered arrangement, and the sprays 5d and 5e sprayed from the spray nozzles 4d and 4e. Are joined to the air 2 without colliding with each other. The flow of the air 2 is disturbed by the sprays 5d and 5e of the spray nozzles 4d and 4e provided in the staggered arrangement, and mixing of the air 2 and the spray 5 is promoted.

  In FIG. 5, the spray sprays 4d and 4e are provided in three locations on the plane in a plane, but the spray nozzles 4d and 4e are also provided from the vertical direction of the drawing to further promote the mixing of the air 2 and the sprays 5d and 5e. it can. That is, the arrangement of the spray nozzles 4 shown in FIG. 5 can be applied to the linear shape portion of the intake duct 1.

  According to the present embodiment, since the sprays 5d and 5e from the spray nozzles 4d and 4e are sprayed in a staggered arrangement inside the intake duct 1, the flow of the air 2 is disturbed, and the sprays 5d and 5e and the air 2 are mixed. This eliminates the need for a device for mixing the sprays 5d, 5e and the air 2. Further, since the spray nozzles 4d and 4e are arranged outside the linear intake duct 1, there are advantages that the spray nozzles 4d and 4e are easy to install and maintenance of the spray nozzles 4d and 4e is easy. .

Next, the definitive configuration to an embodiment of the present invention by FIG. FIG. 6 is a connection diagram between the spray nozzle 4 for spraying hot water and the intake duct wall 10.

6, example embodiment and Figure 2 in FIG. 1, Oite to the embodiment of FIG. 3, it is possible to suppress the thermal conduction time of fixing the spray nozzle 4 into the intake duct wall 10, the hot water pipe 3 A gasket 13 for absorbing thermal expansion and contraction due to the above is provided. The connection configuration of the intake duct wall 10 and the spray nozzle 4 is as follows.

A spray hole 11 is provided in the intake duct wall 10, and a bolt 14 is provided at a position surrounding the spray hole 11 toward the outside of the intake duct wall 10. On the other hand, a mounting plate 12 is provided circumferentially around the spray nozzle 4 connected to the hot water pipe 3. A heat insulating material 15 is applied around the hot water pipe 3. The spray hole 11 provided in the intake duct wall 10 is set so that the end face of the spray nozzle 4 can be seen. At that time, a gasket 13 is provided between the intake duct wall 10 and the mounting plate 12 of the spray nozzle 4. Insert and fix with bolts 14. The gasket 13 is preferably made of a material having heat resistance, heat insulation, and stretchability. For example, polytetrafluoroethylene or silicon is used.
(Action / Effect)
Next, the operation of the embodiment of FIG. 6 will be described.

  The spray nozzle 4 fixed to the intake duct wall 10 through the gasket 13 is supplied with hot water of 130 ° C. to 150 ° C. pressurized from about 5 MPa to 7 MPa from the hot water pipe 3 toward the inside 22 of the intake duct. Spray 5 is sprayed from spray nozzle 4. Although the temperature of the spray nozzle 4 is increased by the hot water, the heat transfer to the intake duct wall 10 is suppressed by the gasket 13, so that the spray 5 is sprayed while maintaining the hot water temperature. Part of heat conduction is generated from the spray nozzle 4 to the intake duct wall 10 via the mounting plate 12 and the bolts 14. However, the heat quantity of the hot water flow rate per spray nozzle 4 is hindered from lowering the hot water temperature. Can be sprayed in the absence.

  According to the present embodiment, since the amount of heat transfer from the spray nozzle 4 to the intake duct wall 10 can be suppressed, a fine spray 5 can be realized, and the air 2 inside the intake duct 22 can be efficiently cooled. Further, the spray nozzle 4 can be detached from the outside of the intake duct 1, and there is an advantage that the spray nozzle 4 can be easily inspected and maintained. In addition, if necessary, an installation that can further suppress heat conduction from the spray nozzle 4 to the intake duct wall 10 by providing a gap between the mounting plate 12 and the bolt 14 or interposing a heat insulating member. Has the above flexibility.

Next, the configuration of the first embodiment of the present invention will be described with reference to FIG. FIG. 7 is a connection diagram between the spray nozzle 4 for spraying hot water and the intake duct wall 10.

Figure 7 shows fraud and mitigating risk further suppressing structure thermal conduction at the time of spraying nozzles 4 fixed to the intake duct wall 10 in the embodiment of FIG. The connection configuration of the intake duct wall 10 and the spray nozzle 4 is as follows.

A spray hole 11 is provided in the intake duct wall 10. On the other hand, a pressing plate 16 is circumferentially provided around the spray nozzle 4 connected to the hot water pipe 3. A heat insulating material 15 is applied around the hot water pipe 3. The spray hole 11 provided in the intake duct wall 10 is set so that the end face of the spray nozzle 4 can be seen. At that time, a gasket 13 is provided between the intake duct wall 10 and the pressing plate 16 of the spray nozzle 4. Make contact with the clamping surface. The gasket 13 is preferably made of a material having heat resistance, heat insulation, and stretchability. For example, polytetrafluoroethylene or silicon is used. A support 18 is provided in the vicinity of the hot water pipe 3, and a pressing spring 17 is provided between the support 18 and the hot water pipe 3.
(Action / Effect)
Next, the operation of the embodiment of FIG. 7 will be described.

  The spray nozzle 4 fixed to the intake duct wall 10 through the gasket 13 is supplied with hot water of 130 ° C. to 150 ° C. pressurized from about 5 MPa to 7 MPa from the hot water pipe 3 toward the inside 22 of the intake duct. Spray 5 is sprayed from spray nozzle 4. Although the temperature of the spray nozzle 4 is increased by the hot water, the heat transfer to the intake duct wall 10 is suppressed by the gasket 13, so that the spray 5 is sprayed while maintaining the hot water temperature. The pressing plate 16 and the gasket 13 are pressed against the intake duct wall 10 by utilizing a reaction force that the elastic body contracted by the pressing spring 17 with the column 18 as a fixed point tries to expand. In this case, since there is no bolt 14 used in FIG. 6, heat transfer from the spray nozzle 4 to the intake duct wall 10 is mainly performed from the pressing plate 16 through the gasket 13. Although some heat is transferred from the spray nozzle 4 to the intake duct wall 10 as radiant heat, spraying can be performed in a state that does not hinder a decrease in the temperature of the hot water from the amount of heat of the flow rate of the hot water per spray nozzle 4. Thus, one of the factors that press the spray nozzle 4 by surface contact without mechanically fixing the spray nozzle 4 to the intake duct wall 10 is that the inside of the intake duct 22 is slightly negative pressure due to suction of the compressor. Can be mentioned.

  According to the present embodiment, the amount of heat transfer from the spray nozzle 4 to the intake duct wall 10 can be further suppressed, so that a stable fine spray 5 can be realized and the air 2 inside the intake duct 22 can be efficiently cooled. it can. Further, since the spray nozzle 4 is not fixed to the intake duct wall 10, the spray nozzle 4 can be easily detached from the outside of the intake duct (1), and the spray nozzle 4 is inspected and maintained by removing the pressing spring 17. There is an advantage that it is easy to do. Further, if necessary, the heat conduction from the spray nozzle 4 to the intake duct wall 10 can be further suppressed by changing the pressing area of the pressing plate 16 and the thickness of the gasket 13. Have Note that the gasket 13 may be bonded to the intake duct wall 10 with silicon rubber paste or the like so that the gasket 13 is not displaced.

Next, the configuration of the second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a connection diagram between the spray nozzle 4 that sprays hot water and the intake duct wall 10.

8 suppresses in Example 1 of Example and Figure 7 in FIG. 6, by changing the method of fixing the spray nozzle 4 into the intake duct wall 10, the heat conduction from the spray nozzle 4 into the intake duct wall 10 A screw-in gasket 19 is provided, and a flexible pipe 21 for absorbing thermal expansion and contraction by the hot water pipe 3 is provided. The connection configuration of the intake duct wall 10 and the spray nozzle 4 is as follows.

A spray hole 11 is provided in the intake duct wall 10. On the other hand, the hot water pipe 3 and the spray nozzle 4 are connected by a flexible pipe 21. A heat insulating material 15 is applied around the hot water pipe 3. The spray hole 11 provided in the intake duct wall 10 is set so that the end face of the spray nozzle 4 can be seen. At that time, the intake duct wall 10 and the spray nozzle 4 are fixed via a screwed gasket 19. The The screwed gasket 19 is preferably made of a material having heat resistance, heat insulation, and stretchability, and for example, polytetrafluoroethylene or silicon is used. A screw portion 20 is provided around the spray hole 11 of the intake duct wall 10, and a screw-in gasket 19 is screwed and fixed to the screw portion 20. There is a hole for setting the spray nozzle 4 on the central axis of the screw gasket 19, and the spray nozzle 4 is inserted into the hole of the screw gasket 19. In this case, the spray nozzle 4 and the screwed gasket 19 are fixed by pressure bonding by making the hole diameter on the central axis of the screwed gasket 19 slightly smaller than the outer diameter of the spray nozzle 4, or the spray nozzle 4 There is a method in which a screw thread is provided on the outer periphery and screwed into the screwed gasket 19 to be fixed.
(Action / Effect)
Next, the operation of the embodiment of FIG. 8 will be described.

  The spray nozzle 4 fixed to the intake duct wall 10 through the screwed gasket 19 is supplied with hot water of 130 ° C. to 150 ° C. pressurized from about 5 MPa to 7 MPa from the hot water pipe 3, and is supplied to the inside 22 of the intake duct. A spray 5 is sprayed from the spray nozzle 4. Although the temperature of the spray nozzle 4 rises due to the hot water, the heat transfer to the intake duct wall 10 is suppressed by the heat-insulating screw gasket 19, so that the spray 5 is sprayed while maintaining the hot water temperature. A part of heat conduction is generated from the spray nozzle 4 to the intake duct wall 10 via the screwed gasket 19, but there is no problem in reducing the temperature of the hot water from the amount of heat of the hot water flow rate per spray nozzle 4. Can be sprayed with. Further, the thermal expansion and contraction of the spray nozzle 4 fixed to the intake duct wall 10 via the screwed gasket 19 is alleviated by the flexible pipe 21 provided between the hot water pipe 3 and the spray nozzle 4.

  According to the present embodiment, since the amount of heat transfer from the spray nozzle 4 to the intake duct wall 10 can be suppressed, a stable fine spray 5 can be realized, and the air 2 inside the intake duct 22 can be efficiently cooled. . Further, the spray nozzle 4 can be attached and detached outside the intake duct 1, and there is an advantage that the spray nozzle 4 can be easily inspected and maintained. Further, since the hot water pipe 3 and the spray nozzle 4 are connected using the flexible pipe 21, it is possible to cope with thermal expansion and contraction in multiple directions by the hot water pipe 3, and the positional relationship between the spray nozzle 4 and the intake duct wall 10 is shifted. Without spraying, the spray 5 can be sprayed to an appropriate position inside the intake duct 22.

1 Intake duct 2 Air 3 Hot water piping 4 Spray nozzle 5 Spray (fine droplet group)
6 High-pressure hot water 7 Fine droplet 8 Outside the intake duct 9 Stir flow 10 Intake duct wall 11 Spray hole 12 Mounting plate 13 Gasket 14 Bolt 15 Heat insulating material 16 Pressing plate 17 Pressing spring 18 Strut 19 Screw-in gasket 20 Screw portion 21 Flexible piping 22 Inside the intake duct

Claims (5)

In a hot water spraying device that atomizes hot water by vacuum boiling and sprays it inside the intake duct,
A hot water pipe is arranged outside an intake duct for introducing air into the compressor, and a spray nozzle is connected to the hot water pipe, and the intake duct is connected to the intake duct through a spray hole formed in a wall surface of the intake duct. Configure to spray hot water inside,
Having a mounting plate for mounting the spray nozzle to the intake duct, and interposing a heat insulating member between a wall surface of the intake duct and the mounting plate;
A hot water spraying device, wherein a pressing spring for pressing the spray nozzle against a wall surface of the intake duct is provided in the hot water pipe. In a hot water spraying device that atomizes hot water by vacuum boiling and sprays it inside the intake duct,
A hot water pipe is arranged outside an intake duct for introducing air into the compressor, and a spray nozzle is connected to the hot water pipe, and the intake duct is connected to the intake duct through a spray hole formed in a wall surface of the intake duct. Configure to spray hot water inside,
Having a mounting plate for mounting the spray nozzle to the intake duct, and interposing a heat insulating member between a wall surface of the intake duct and the mounting plate;
A hot water spraying apparatus comprising a screwed gasket for joining the spray nozzle and a wall surface of the intake duct, and connecting the spray nozzle and the hot water pipe with a flexible pipe. The warm water spray device according to claim 1 or 2 ,
The hot water spraying apparatus, wherein the spray nozzle is disposed immediately upstream or immediately downstream of a bent portion of the intake duct. The warm water spray device according to claim 1 or 2 ,
The said spray nozzle is arrange | positioned at the duct surface which the said air intake duct mutually opposes, and has arrange | positioned with respect to the spray nozzle of an opposing surface, the hot water spray apparatus characterized by the above-mentioned. An intake duct for sucking air; a hot water spraying device for spraying hot water refined by boiling under reduced pressure; a compressor for compressing air sucked from the intake duct; and air compressed by the compressor A gas turbine system comprising: a combustor that combusts fuel and fuel; and a turbine that is driven by combustion gas generated in the combustor.
A gas turbine system using the hot water spray device according to claim 1 as the hot water spray device .