JP2016061528A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve effective steam condensing and low pressure loss.SOLUTION: A condenser 1A comprises: a main body shell 1 being disposed at a steam turbine 6 outlet side via a diffuser 8 and having a gas introduction section 2; and a plurality of cooling water supply tubes 4 disposed in a vertical direction inside the main body shell 1. Individual ones of the plurality of cooling water supply tubes 4 are fitted with a plurality of pieces of cooling water injection means 3. As the cooling water supply tubes 4 are spaced apart from a central axis L of the main body shell 1, intervals P in a horizontal direction among the cooling water supply tubes 4 adjacent to one another gradually become smaller.SELECTED DRAWING: Figure 1

Description

  Embodiments of the invention relate to a condensing device.

  A geothermal power generation system using geothermal heat, which is one of the renewable energies, is mainly composed of a flasher, pump, turbine, generator, and condensate device. The condensate device is provided downstream of the turbine and discharged from the turbine. It plays a role of increasing the power generation output by condensing the generated gas and keeping the internal pressure low. In addition to the steam, the gas discharged from the turbine may include a gas having a boiling point lower than that of the steam (hereinafter, non-condensable gas). In the condensing device, cooling water is refined and injected to the surface contact type and turbine exhaust steam configured to be cooling water inside the heat transfer tube and turbine exhaust steam outside, using cooling water injection means. There is a direct contact type to do. A nozzle having a constricted portion in the internal flow path may be used as the cooling water injection means. Further, in terms of equipment arrangement, there is a case where a condensing device is provided immediately below the turbine, or a condensing device is provided on the side of the turbine. In any type, the condensing device provided is required to have effective steam condensation and low pressure loss.

  When the above-mentioned direct contact type condensing device is provided directly under the turbine, the gas discharged in the axial direction of the horizontally installed turbine rotor becomes a downward flow in the vertical direction via the diffuser provided immediately after the turbine. It flows into the condenser. The condensing device has a main body cylinder and a cooling water supply pipe provided in the main body cylinder, and the steam is condensed by the cooling water injected from the cooling water injection means provided in the cooling water supply pipe. As the flow rate decreases, the concentration of non-condensable gas increases. A plurality of cooling water injection means are provided on the side surface of the cooling water supply pipe installed in the vertical direction, and the cooling water is injected so as to be orthogonal to the steam flowing downward in the vertical direction.

  The cooling water injected from the cooling water injection means gradually increases the downward velocity in the vertical direction by the drag received from the gravity and the steam flow. Generally, the cooling water jetted from the cooling water jetting means is in the form of droplets, and the size thereof is characterized by the differential pressure across the cooling water jetting means. That is, the cooling water injection means provided at the upper part of the cooling water supply pipe has a small differential pressure across the front and a relatively large droplet is injected. In the cooling water jetting means provided at the lower part of the supply pipe, the differential pressure across the front and rear is increased, so that relatively small droplets are jetted.

  By the way, in general, the cooling water supply pipes are arranged at equal intervals in the main body cylinder in order to make the cooling water filling the condensing device uniform.

  Regarding such a condensing device, there is a configuration as shown in Patent Document 1 as a conventional example.

  The one described in Patent Document 1 is a direct contact condenser for a geothermal power plant, and in a trunk having a steam condensing unit and a gas cooling unit inside, both the condensing unit and the gas cooling unit. In order to span, two cooling water supply pipes having spray nozzles are provided, and a cooling water flow rate adjusting valve is provided for each system. In Patent Document 1, an appropriate operating state corresponding to the coolant flow rate that can be supplied is maintained in preparation for a case where an auxiliary machine provided in the geothermal power plant fails.

Japanese Patent No. 3314566

  As described above, when the above-mentioned direct contact type condensing device is provided immediately below the turbine, the gas discharged in the axial direction of the turbine rotor installed horizontally is vertically directed through the diffuser provided immediately after the turbine. It flows downward into the condensate unit. At this time, due to the flow velocity distribution at the time of discharge from the turbine and the deviation of the flow that occurs when the flow direction is forcibly changed, the non-uniform flow velocity distribution in the same height cross section at the condensing unit inlet. A gas flow field is created.

  Further, when the cooling water is uniformly injected in the same height cross section in the condensing device as in the conventional configuration, even after a part of the steam is condensed, the gas flow field is non-uniform as described above. In order to realize a low pressure loss, it is desirable to have an orderly gas flow field in the condensing device. For this reason, when there is a flow velocity distribution at the inlet of the condensing device, one of the problems is to alleviate the non-uniformity that occurs in the gas flow field in the condensing device.

  Since the gas obtained from the steam generation well in geothermal power generation generally contains a non-condensable gas, the concentration of the non-condensable gas increases as the vapor condenses. In the case of having a structure in which cooling water and steam are brought into direct contact, such as the condensing device targeted by the present invention, it is known that the condensation effect is reduced if non-condensable gas is contained in the steam. The effect becomes even greater as the gas concentration increases. For this reason, in a condensing device having a complicated internal structure, a non-condensable gas retention part may be formed in a low flow velocity region, and it is expected that vapor condensation in the region is inhibited.

  An object of the present embodiment is to provide a condensing device that realizes effective steam condensation and low pressure loss by optimizing the distribution of cooling water inside the condensing device.

  In this embodiment, in the condensing device arranged on the steam turbine outlet side via a diffuser, a mixed gas containing steam discharged from the steam turbine is introduced, and a gas introduction unit connected to the diffuser A main body cylinder having a central axis extending in the vertical direction, and a plurality of cooling water supply pipes provided in the main body cylinder, each having a plurality of cooling water injection means, while cooling water flows upward in the main body cylinder And the horizontal interval between the adjacent cooling water supply pipes gradually decreases as the cooling water supply pipes move away from the central axis of the main body cylinder.

  In this embodiment, in the condensing device arranged on the steam turbine outlet side via a diffuser, a mixed gas containing steam discharged from the steam turbine is introduced, and a gas introduction unit connected to the diffuser A main body cylinder having a central axis extending in the vertical direction, and a plurality of cooling water supply pipes provided in the main body cylinder, each having a plurality of cooling water injection means, while cooling water flows upward in the main body cylinder And the number of the cooling water injection means of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body barrel.

  In this embodiment, in the condensing device arranged on the steam turbine outlet side via a diffuser, a mixed gas containing steam discharged from the steam turbine is introduced, and a gas introduction unit connected to the diffuser A main body cylinder having a central axis extending in the vertical direction, and a plurality of cooling water supply pipes provided in the main body cylinder, each having a plurality of cooling water injection means, while cooling water flows upward in the main body cylinder The total length of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body barrel.

  In this embodiment, in the condensing device arranged on the steam turbine outlet side via a diffuser, a mixed gas containing steam discharged from the steam turbine is introduced, and a gas introduction unit connected to the diffuser A main body cylinder having a central axis extending in the vertical direction, and a plurality of cooling water supply pipes provided in the main body cylinder, each having a plurality of cooling water injection means, while cooling water flows upward in the main body cylinder A control valve is attached to at least one cooling water supply pipe, and the control valve is controlled to supply cooling water in the cooling water supply pipe as the cooling water supply pipe moves away from the central axis of the main body cylinder. It is a condensing device characterized by gradually increasing the amount.

FIG. 1 shows a first embodiment of a condensing device. FIG. 2 is a view showing a condensing device as a comparative example. FIG. 3 is a conceptual diagram showing the flow velocity distribution in the gas introduction part. FIG. 4 is a diagram showing a second embodiment of the condensing device. FIG. 5 is a view showing a third embodiment of the condensing device. FIG. 6 is a diagram showing a fourth embodiment of the condensing device.

<First Embodiment>
Hereinafter, a first embodiment of a condensing device will be described with reference to the drawings.

  FIG. 1 is a diagram showing a first embodiment of a condensing device.

  As shown in FIG. 1, the condensing device 1 </ b> A according to the present embodiment is a direct contact condensing device installed below a steam turbine 6 that rotates around a rotating shaft 7.

  Such a condensing device (direct contact condensing device) 1A is installed below the steam turbine 6 via a diffuser 8, and a mixed gas of steam and non-condensable gas discharged from the steam turbine 6 is introduced. A main body cylinder 1 having a gas introduction section 2 communicated with the diffuser 8 and having a discharge pipe (discharge section) 11 for discharging drainage, and a cooling water provided inside the main body cylinder 1 upward. A plurality of flowing cooling water supply pipes 4 are provided.

  Of these, the main body cylinder 1 has a central axis L extending in the vertical direction. Further, each cooling water supply pipe 4 provided in the main body body 1 is provided with a plurality of cooling water injection means 3 for injecting cooling water.

  Each cooling water supply pipe 4 provided in the main body cylinder 1 extends in the vertical direction in the main body cylinder 1. Each cooling water supply pipe 4 is connected to a mother pipe 5, and cooling water is supplied from the mother pipe 5 to each cooling water supply pipe 4.

  Furthermore, as shown in FIG. 1, as the cooling water supply pipe 4 moves away from the central axis L of the main body barrel 1, the horizontal interval (pitch) P between adjacent cooling water supply pipes 4 gradually decreases. Therefore, the number of the cooling water injection means 3 in the vicinity of the inner wall of the main body cylinder 1 is larger than that in the vicinity of the central axis L.

  Next, the operation of the present embodiment having such a configuration will be described.

  In FIG. 1, a mixed gas composed of steam and noncondensable gas discharged from the steam turbine 6 flows into the main body cylinder 1 from the gas introduction part 2 of the main body cylinder 1. The mixed gas flowing into the main body cylinder 1 comes into contact with the cooling water droplets supplied to the inside of the main body cylinder 1 by the cooling water injection means 3, and only the vapor is condensed. The condensed water in which the steam is condensed is discharged from the discharge pipe 11, and non-condensable gas such as carbon dioxide or hydrogen sulfide is not condensed. After being raised and cooled in the gas cooling unit 10, it is released into the atmosphere through the discharge pipe 12.

  In FIG. 1, as the distance l between the cooling water supply pipe 4 and the central axis L increases, the pitch p between the adjacent cooling water supply pipes 4 decreases, so that the cooling water injection means in the vicinity of the inner wall of the main body barrel 1. The number of 3 is larger than the vicinity of the central axis L. For this reason, as the distance l between the cooling water supply pipe 4 and the central axis L increases, the number density of droplets existing inside the main body cylinder 1 increases.

  By the way, in this Embodiment, since the direct contact type condensing apparatus 1A is provided directly under the steam turbine 6, the mixed gas from the steam turbine 6 discharged | emitted in the axial direction of the rotating shaft 7 installed horizontally. Flows through the diffuser 8 provided immediately after the turbine 6 and changes the flow direction downward in the vertical direction and flows into the main body cylinder 1. For this reason, an uneven flow occurs in the gas introduction part 2. That is, since the mixed gas discharged from the steam turbine 6 tends to flow along the inner wall surface of the diffuser 8, the gas introduction part 2 connected to the diffuser 8 is similarly located near the inner wall surface of the main body cylinder 1. The flow velocity becomes relatively large. Here, FIG. 3 is a diagram showing the relationship between the axial distance X of the steam turbine 6 and the gas flow velocity Vg. As shown in FIG. 3, although the pressure of the gas introduction part 2 has a minute cross-sectional distribution, it is expected that the influence on the gas density is small, so the flow velocity distribution and the mass flow distribution of the mixed gas are considered to be approximately equal. It's okay. That is, the flow velocity distribution of the mixed gas immediately before the droplet existence range inside the main body cylinder 1 is large near the inner wall surface of the main body cylinder 1 and is small at the gas cooling section 10 near the center line L.

  According to the present embodiment, as the distance l between the cooling water supply pipe 4 and the central axis L increases as described above, the pitch p between the adjacent cooling water supply pipes 4 becomes smaller. The number of droplets increases near the inner wall surface. Since the number of droplets can be increased in the vicinity of the inner wall surface of the main body cylinder 1 where the flow velocity distribution of the mixed gas becomes large in this way, the vapor contained in the mixed gas has a high number density of the droplets (the main body cylinder 1). In the vicinity of the inner wall surface). Therefore, as the mixed gas flows in the main body 1, the mass flow rate distribution and the flow velocity distribution are leveled and approach an orderly flow field. Thereby, the pressure loss of a condensing apparatus can be suppressed.

  On the other hand, in the comparative example shown in FIG. 2, the number of the cooling water injection means 3 between the vicinity of the inner wall of the main body cylinder 1 and the central axis L in the same height section of the main body cylinder 1 regardless of the mass flow rate of the gas. The number density of droplets is also uniform. In such a comparative example, in the central region where the mass flow rate of the mixed gas is small, the amount of vapor condensation becomes excessive, and there is a possibility that the local non-condensable gas concentration increases and the gas flow rate decreases. In the comparative example shown in FIG. 2, the mass flow rate of the gas is large in the vicinity of the inner wall surface of the main body cylinder 1 and the gas flow rate of the mixed gas is not sufficiently lowered. Therefore, the mixed gas does not flow out to the gas cooling water section 10 and moves upward. There is a possibility of backflow. The formation of the high-concentration gas region and the occurrence of the backflow are expected to cause a gas retention portion in the vicinity of the central axis, thereby greatly reducing the vapor condensation effect.

  On the other hand, according to the present embodiment, it is possible to level the flow field of the mixed gas and suppress the generation of the gas retention portion. As a result, in the condensing device, the steam contained in the air-fuel mixture can be effectively condensed.

  In order to determine the pitch p between the cooling water supply pipes 4, it is necessary to consider the shape of the gas introduction unit 2 and the operating conditions of the turbine 6. A method of predicting the flow field of the mixed gas in advance by fluid analysis or the like may be used.

<Second Embodiment>
Next, a second embodiment of the condensing device will be described with reference to the drawings.

  FIG. 4 is a diagram showing a second embodiment of the condensing device. In the second embodiment shown in FIG. 4, the same parts as those in the first embodiment shown in FIG.

  As shown in FIG. 4, the condensing device 1 </ b> A according to the present embodiment is a direct contact condensing device installed below a steam turbine 6 that rotates around a rotating shaft 7.

  Such a condensing device (direct contact condensing device) 1A is installed below the steam turbine 6 via a diffuser 8, and a mixed gas of steam and non-condensable gas discharged from the steam turbine 6 is introduced. A main body cylinder 1 having a gas introduction section 2 communicated with the diffuser 8 and having a discharge pipe (discharge section) 11 for discharging drainage, and a cooling water provided inside the main body cylinder 1 upward. A plurality of flowing cooling water supply pipes 4 are provided.

  Of these, the main body cylinder 1 has a central axis L extending in the vertical direction. Further, each cooling water supply pipe 4 provided in the main body body 1 is provided with a plurality of cooling water injection means 3 for injecting cooling water.

  Each cooling water supply pipe 4 provided in the main body cylinder 1 extends in the vertical direction in the main body cylinder 1. Each cooling water supply pipe 4 is connected to a mother pipe 5, and cooling water is supplied from the mother pipe 5 to each cooling water supply pipe 4.

  Further, as the cooling pipe 4 moves away from the central axis L of the main body barrel 1, the number of cooling water injection means attached to the cooling water supply pipe 4 increases.

  Next, the operation of the present embodiment having such a configuration will be described.

  In FIG. 4, a mixed gas composed of steam and noncondensable gas discharged from the steam turbine 6 flows into the main body cylinder 1 from the gas introduction part 2 of the main body cylinder 1. The mixed gas flowing into the main body cylinder 1 comes into contact with the cooling water droplets supplied to the inside of the main body cylinder 1 by the cooling water injection means 3, and only the vapor is condensed. The condensed water in which the steam is condensed is discharged from the discharge pipe 11, and non-condensable gas such as carbon dioxide or hydrogen sulfide is not condensed. After being raised and cooled in the gas cooling unit 10, it is released into the atmosphere through the discharge pipe 12.

  In FIG. 4, as the distance l between the cooling water supply pipe 4 and the central axis L increases, the number of the cooling water injection means 3 attached to the cooling water supply pipe 4 increases. As the distance l from the axis increases, the number density of droplets existing inside the main body cylinder 1 increases.

  According to the present embodiment, the number distribution of the cooling water ejecting means 3 can increase the droplet number density in the vicinity of the inner wall surface of the main body cylinder 1. In addition, using the condensing device with the configuration shown in the conventional example, it is possible to respond only by processing the cooling water supply pipe and changing the mounting position of the cooling water injection means, and it is possible to improve the performance of the condensing device at low cost and short delivery time. It becomes.

<Third Embodiment>
Next, a third embodiment of the condensing device will be described with reference to the drawings.

  FIG. 5 is a view showing a third embodiment of the condensing device. In the third embodiment shown in FIG. 5, the same parts as those in the first embodiment shown in FIG.

  As shown in FIG. 5, the condensing device 1 </ b> A according to the present embodiment is a direct contact condensing device installed below a steam turbine 6 that rotates around a rotating shaft 7.

  Such a condensing device (direct contact condensing device) 1A is installed below the steam turbine 6 via a diffuser 8, and a mixed gas of steam and non-condensable gas discharged from the steam turbine 6 is introduced. A main body cylinder 1 having a gas introduction section 2 communicated with the diffuser 8 and having a discharge pipe (discharge section) 11 for discharging drainage, and a cooling water provided inside the main body cylinder 1 upward. A plurality of flowing cooling water supply pipes 4 are provided.

  Of these, the main body cylinder 1 has a central axis L extending in the vertical direction. Further, each cooling water supply pipe 4 provided in the main body body 1 is provided with a plurality of cooling water injection means 3 for injecting cooling water.

  Each cooling water supply pipe 4 provided in the main body cylinder 1 extends in the vertical direction in the main body cylinder 1. Each cooling water supply pipe 4 is connected to a mother pipe 5, and cooling water is supplied from the mother pipe 5 to each cooling water supply pipe 4.

  Further, as the cooling water supply pipe 4 moves away from the center line L of the main body body 1, the total length of the cooling water supply pipe 4 gradually increases. Furthermore, as the cooling water supply pipe 4 moves away from the center line L of the main body body 1, the average installation position of the cooling water injection means 3 provided in each cooling water supply pipe 4 (the installation positions of the plurality of cooling water injection means 3). The average position) gradually increases.

  Next, the operation of the present embodiment having such a configuration will be described. As shown in FIG. 5, a mixed gas composed of steam and noncondensable gas discharged from the steam turbine 6 flows into the main body cylinder 1 from the gas introduction part 2 of the main body cylinder 1. The mixed gas flowing into the main body cylinder 1 comes into contact with the cooling water droplets supplied to the inside of the main body cylinder 1 by the cooling water injection means 3, and only the vapor is condensed. The condensed water in which the steam is condensed is discharged from the discharge pipe 11, and non-condensable gas such as carbon dioxide or hydrogen sulfide is not condensed. After being raised and cooled in the gas cooling unit 10, it is released into the atmosphere through the discharge pipe 12. In FIG. 5, when the total length of the cooling water supply pipe 4 is gradually increased as the distance from the central axis L of the main body body 1 increases, the steam can be condensed immediately after the gas introduction unit 2. That is, in the vicinity of the inner wall surface of the main body cylinder 1, the mixed gas immediately after being introduced into the gas introduction part 2 can be cooled with the cooling water at an early stage, and the contact time with the cooling water can be increased. For this reason, the cooling efficiency as a whole can be raised.

  Here, the cooling water injection means 3 installed in the vicinity of the inner wall surface of the main body barrel 1 and at the uppermost stage of the cooling water supply pipe 4 will be considered. In general, the size of a droplet discharged from the cooling water ejecting means 3 is characterized by a differential pressure across the cooling water ejecting means 3. Further, the larger the droplets, the lower the vapor condensation effect. The front-rear differential pressure of the cooling water ejecting means 3 located at the uppermost stage is small and large droplets are ejected. On the other hand, a droplet present in a flow is deformed or vibrated by a drag force received from the flow, and if the force that separates the droplet itself against the surface tension of the droplet is strong, the droplet breaks up. Increase in number density is expected. This contributes to the realization of effective condensation.

  Note that the third embodiment and the first embodiment may be combined, or the third embodiment and the second embodiment may be combined.

  For example, when the number of the cooling water injection means 3 provided in the cooling water supply pipe 4 is increased as in the second embodiment, the cooling pitch of the cooling water injection means 3 is reduced and the cooling located at the lowermost part is performed. It is considered that it is difficult for the water ejecting means 3 to ensure the time for the droplet-shaped cooling water to come into contact with the steam. Thus, by combining the second embodiment and the third embodiment, it is possible to ensure the contact time between the cooling water and the steam. The combination of the third embodiment and the first embodiment, or the combination of the third embodiment and the second embodiment is determined according to the degree of drift in the gas introduction unit 2. May be.

<Fourth embodiment>
Next, a fourth embodiment of the condensing device will be described with reference to the drawings.

  FIG. 6 is a view showing a fourth embodiment of the condensing device. In the fourth embodiment shown in FIG. 6, the same parts as those in the first embodiment shown in FIG.

  As shown in FIG. 6, the condensing device 1 </ b> A according to the present embodiment is a direct contact condensing device installed below a steam turbine 6 that rotates around a rotating shaft 7.

  Such a condensing device (direct contact condensing device) 1A is installed below the steam turbine 6 via a diffuser 8, and a mixed gas of steam and non-condensable gas discharged from the steam turbine 6 is introduced. A main body cylinder 1 having a gas introduction section 2 communicated with the diffuser 8 and having a discharge pipe (discharge section) 11 for discharging drainage, and a cooling water provided inside the main body cylinder 1 upward. A plurality of flowing cooling water supply pipes 4 are provided.

  Of these, the main body cylinder 1 has a central axis L extending in the vertical direction. Further, each cooling water supply pipe 4 provided in the main body body 1 is provided with a plurality of cooling water injection means 3 for injecting cooling water.

  Each cooling water supply pipe 4 provided in the main body cylinder 1 extends in the vertical direction in the main body cylinder 1. Each cooling water supply pipe 4 is connected to a mother pipe 5, and cooling water is supplied from the mother pipe 5 to each cooling water supply pipe 4.

  A control valve 9 that can be controlled from the outside is attached to all or part of the cooling water supply pipe 4.

  Next, the operation of the present embodiment having such a configuration will be described.

  In FIG. 6, a mixed gas composed of steam and noncondensable gas discharged from the steam turbine 6 flows into the main body cylinder 1 from the gas introduction part 2 of the main body cylinder 1. The mixed gas flowing into the main body cylinder 1 comes into contact with the cooling water droplets supplied to the inside of the main body cylinder 1 by the cooling water injection means 3, and only the vapor is condensed. The condensed water in which the steam is condensed is discharged from the discharge pipe 11, and non-condensable gas such as carbon dioxide or hydrogen sulfide is not condensed. After being raised and cooled in the gas cooling unit 10, it is released into the atmosphere through the discharge pipe 12.

  In FIG. 6, the supply amount of the cooling water flowing downstream from the control valve 9 can be controlled by the control valve 9 provided in the cooling water supply pipe 4. In this case, the cooling water supply amount is controlled by the control valve 9 so that the cooling water supply amount in the cooling water supply tube 4 is gradually increased as the cooling water supply tube 4 is separated from the central axis L of the main body barrel 1. Control.

  In the power generation system in which the condensing device 1A is installed, there are cases where operating conditions change due to deterioration over time, or intentional partial load operation is executed. According to the present embodiment, it is possible to operate the condensing device suitable for various operating conditions while maintaining the configuration of the condensing device at the time of power plant construction. As the control valve 9, a control valve that automatically adjusts the opening while monitoring the flow rate of the cooling water flowing inside each cooling water supply pipe 4 can be used. Furthermore, when the control valve 9 is provided in all the cooling water supply pipes 4, the flow rate of the cooling water flowing into the cooling water supply pipe 4 can be controlled independently.

  Note that the fourth embodiment and the third embodiment can be combined. In this case, the further condensing effect of the condensing device 1A and a flexible operation according to the operation state are possible.

  While the present embodiment has been described above, the above embodiment is illustrative, and the scope of the present invention is not limited to the above embodiment, and does not depart from the spirit of the present invention. Various changes in range are possible.

DESCRIPTION OF SYMBOLS 1 Main body trunk, 1A Condensation device, 2 Gas introduction part, 3 Cooling water injection means, 4 Cooling water supply pipe, 5 Mother pipe, 6 Steam turbine, 7 Rotating shaft, 8 Diffuser, 9 Control valve, 10 Gas cooling part, 11 Discharge pipe

Claims (7)

In the condensing device arranged through the diffuser on the steam turbine outlet side,
A main body cylinder having a central axis extending in the vertical direction, having a gas introduction portion connected to the diffuser, and a gas mixture containing steam discharged from the steam turbine;
A plurality of cooling water supply pipes each provided with a plurality of cooling water jetting means provided in the main body trunk, while cooling water flows upward in the interior;
A condensing device, wherein a horizontal interval between adjacent cooling water supply pipes gradually decreases as the cooling water supply pipe moves away from the central axis of the main body cylinder. In the condensing device arranged through the diffuser on the steam turbine outlet side,
A main body cylinder having a central axis extending in the vertical direction, having a gas introduction portion connected to the diffuser, and a gas mixture containing steam discharged from the steam turbine;
A plurality of cooling water supply pipes each provided with a plurality of cooling water jetting means provided in the main body trunk, while cooling water flows upward in the interior;
The condensing device, wherein the number of cooling water injection means of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body cylinder. In the condensing device arranged through the diffuser on the steam turbine outlet side,
A main body cylinder having a central axis extending in the vertical direction, having a gas introduction portion connected to the diffuser, and a gas mixture containing steam discharged from the steam turbine;
A plurality of cooling water supply pipes each provided with a plurality of cooling water jetting means provided in the main body trunk, while cooling water flows upward in the interior;
The condensing device, wherein the total length of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body cylinder.   The condensing device according to claim 1, wherein the number of cooling water injection means of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body cylinder.   5. The condensing device according to claim 1, wherein the total length of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body body. In the condensing device arranged through the diffuser on the steam turbine outlet side,
A main body cylinder having a central axis extending in the vertical direction, having a gas introduction portion connected to the diffuser, and a gas mixture containing steam discharged from the steam turbine;
A plurality of cooling water supply pipes each provided with a plurality of cooling water jetting means provided in the main body trunk, while cooling water flows upward in the interior;
A control valve is attached to at least one cooling water supply pipe, and the control valve is controlled so that the cooling water supply amount in the cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the body trunk. A condensing device characterized by increasing.   The condensing device according to claim 6, wherein the total length of each cooling water supply pipe gradually increases as the cooling water supply pipe moves away from the central axis of the main body barrel.

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