JP2015121368A - Direct contact condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a direct contact condenser capable of reducing the number of nozzles for injecting coolant.SOLUTION: A direct contact condenser includes: a condenser body having an internal space provided therein, turbine exhaust gas being introduced into the internal space; and a water spray tube 23 provided upright in the internal space of the condenser body and spraying coolant to the turbine exhaust gas introduced into the internal space of the condenser body, the water spray tube 23 including a water spray tube body 25 that includes a plurality of nozzles 24 provided to be distanced from one another in an axial direction for injecting the coolant; an opening/closing element 26 formed in a cylindrical shape so as to be slidable with the water spray tube body 25 to open or close the nozzles 24; and a drive mechanism 28 slidably moving the opening/closing element 26 to open or close the nozzles 24.

Description

  The present invention relates to a direct contact condenser that condenses water vapor contained in turbine exhaust by injecting and mixing cooling water into turbine exhaust, and in particular, injects cooling water without stopping operation. The present invention relates to a direct contact condenser that can reduce the number of nozzles.

  A condenser main body into which turbine exhaust is introduced into the internal space, and a water spray pipe standing in the internal space of the condenser main body, and cooling water is supplied to the turbine exhaust from a number of nozzles provided in the water spray pipe. Direct contact condensers for jetting are widely known. According to this condenser, the cooling water is injected into the turbine exhaust introduced into the internal space of the condenser main body from a number of nozzles provided in the water spray pipe, and the water vapor contained in the turbine exhaust is condensed ( For example, see Patent Document 1).

  A turbine that rotates using natural steam generated by geothermal heat, a condenser that introduces turbine exhaust into the interior space, injects cooling water into the turbine exhaust, and condenses water vapor contained in the turbine exhaust; 2. Description of the Related Art A geothermal power plant including a cooling tower that stores water condensed by a water vessel and generates cooling water is widely known. This geothermal power plant is provided with a recovery water pipe for collecting the water condensed by the condenser to the cooling tower, and a supply water pipe for supplying the cooling water generated by the cooling tower to the condenser. A pump is installed in the water pipe. According to this power plant, the required pressure of the nozzle that injects cooling water into the turbine exhaust is ensured (see, for example, Patent Document 2).

  A condenser body in which turbine exhaust is introduced into the internal space, and a water spray pipe provided horizontally in the internal space of the condenser body, and cooling water is supplied to the turbine exhaust from a number of nozzles provided in the water spray pipe. A direct contact condenser that injects water is known. In order to equalize the difference in water pressure corresponding to the height at which each sprinkler pipe is installed, this condenser has an inner diameter corresponding to the height at which the sprinkler pipe is installed. A throttle corresponding to the height at which the watering pipe is installed is provided (for example, see Patent Document 3).

Japanese Utility Model Publication No. 63-142575 JP 2013-79603 A JP 2012-117740 A

By the way, the geothermal power plant may attenuate the pressure of geothermal steam and the amount of geothermal steam ejected from the beginning of operation due to long-term operation. In such a case, it is preferable to reduce the amount of cooling water circulating through the cooling tower and the condenser, reduce the number of nozzles for injecting cooling water, and reduce the auxiliary power.
However, in order to reduce the number of nozzles for injecting cooling water, it is necessary to install a lid on the nozzle in a state where the operation of the condenser is stopped, and the cooling water is injected without stopping the operation of the condenser. The number of nozzles could not be reduced.
In view of the above circumstances, an object of the present invention is to provide a direct contact condenser that can reduce the number of nozzles that inject cooling water without stopping operation.

The present invention is provided with an internal space, a condenser main body into which turbine exhaust is introduced, and an internal space of the condenser main body, which is erected and introduced into the internal space of the condenser main body. A water spray pipe for spraying cooling water to the turbine exhaust, and the water spray pipe includes a water spray pipe main body in which a plurality of nozzles for injecting the cooling water are provided at intervals in the axial direction, and the water spray pipe main body. An opening / closing body that is formed into a slidable cylinder and opens and closes the nozzle, and a drive mechanism that slides the opening / closing body and opens and closes the nozzle.
According to the present invention, since the drive mechanism slides the opening / closing body to open / close the nozzles, the number of nozzles that inject cooling water can be reduced without stopping the operation. This reduces the amount of cooling water circulating between the cooling tower and the condenser without stopping the operation of the condenser when the geothermal steam pressure or geothermal steam ejection amount is attenuated. The number of nozzles that spray water can be reduced. As a result, auxiliary power can be reduced without stopping the operation of the condenser.

In one aspect of the present invention, it is preferable that the opening / closing body sequentially closes a plurality of nozzles provided at intervals in the axial direction from below.
In this way, efficient nozzles for condensing turbine exhaust can be kept open and inefficient nozzles can be closed, so that turbine exhaust can be efficiently condensed.

In one aspect of the present invention, the opening / closing body is preferably configured as a single body that simultaneously closes at least two of the plurality of nozzles provided at intervals in the axial direction.
In this way, since the open / close body configured as a single body simultaneously closes at least two nozzles, it is not necessary to provide a drive mechanism for each nozzle.

In one aspect of the present invention, it is preferable that the opening / closing body is configured as an individual body that individually closes a plurality of nozzles provided at intervals in the axial direction.
In this way, since the opening / closing body constituted by the individual body individually closes the plurality of nozzles, the control of the drive mechanism can be simplified.

In one aspect of the present invention, it is preferable that the opening / closing body closes only a nozzle provided in a lower region among a plurality of nozzles provided at intervals in the axial direction.
In this way, since the nozzles that are efficient for condensing the turbine exhaust are kept open and only the inefficient nozzles are closed, the turbine exhaust can be efficiently condensed.

In one aspect of the present invention, the opening / closing body is in a state in which the first through hole that overlaps the first nozzle provided in the water spray pipe body, and the first nozzle and the first through hole overlap each other. And a second through hole that overlaps with the second nozzle provided in the upper region of the first nozzle and overlaps the second nozzle even when the first through hole is detached from the first nozzle. It is preferable to have.
If it does in this way, only the 1st nozzle can be closed in the state where the 2nd nozzle was opened.

  As described above, according to the present invention, the drive mechanism slides the opening / closing body to open / close the nozzles, so that the number of nozzles for injecting cooling water can be reduced without stopping the operation. This reduces the amount of cooling water circulating between the cooling tower and the condenser without stopping the operation of the condenser when the geothermal steam pressure or geothermal steam ejection amount is attenuated. The number of nozzles that spray water can be reduced. As a result, auxiliary power can be reduced without stopping the operation of the condenser.

It is a schematic diagram which shows the geothermal power plant using the direct contact type condenser which is embodiment of this invention. It is a schematic diagram which shows the external appearance of the watering pipe which concerns on embodiment of this invention. It is a schematic diagram which shows the structure of the watering pipe which concerns on embodiment of this invention. It is a figure which shows the relationship between the water spray pipe main body shown in FIG. 3, and an opening-closing body. 5 is a cross-sectional view taken along line VV shown in FIG. It is a figure which shows the open state and closed state of a nozzle. It is a figure which shows the drive mechanism of the opening-closing body which concerns on embodiment of this invention.

  Exemplary embodiments of a direct contact condenser according to the present invention will be described below in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments.

  First, a main part of a geothermal power plant using a direct contact condenser which is an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram showing a geothermal power plant using a direct contact condenser which is an embodiment of the present invention.

  A geothermal power generation plant pumps steam from a well called a production well from a geothermal reservoir formed deep in the ground, and rotates the turbine with the power of the steam to generate power. The geothermal reservoir is formed near a magma chamber that occurs several kilometers to several tens of kilometers below the volcanic belt. The rock around the magma chamber is heated at a high temperature of 1000 ° C., and rainwater and groundwater reach from the surface of the rock through the cracks in the heated rock, thereby forming a geothermal reservoir.

  As shown in FIG. 1, the geothermal power plant includes a direct contact condenser 2 that is an embodiment of the present invention, a steam separator, a decompressor, a steam turbine 3, a generator, and a cooling tower 4. Configured. In the geothermal power plant, the steam pumped from the production well is supplied to the steam turbine 3 through a steam separator and a decompressor. The steam supplied to the steam turbine 3 rotates a turbine (not shown), and a generator provided coaxially with the turbine generates electricity (power generation). On the other hand, the exhaust discharged from the steam turbine 3 (referred to as “turbine exhaust” in the following description) is introduced into the direct contact condenser 2 according to the embodiment of the present invention, and the steam contained in the turbine exhaust is condensed. The water is then recovered and passed through the recovery water pipe 11 and recovered in the cooling tower 4. On the other hand, after the water recovered in the cooling tower 4 is cooled in the tank 41, a part of the water passes through the supply water pipe 12 as cooling water and is supplied to the direct contact condenser 2 according to the embodiment of the present invention. The part is returned deep underground with a well called a reduction well.

The direct contact condenser 2 according to the embodiment of the present invention includes a condenser main body 21, a watering mother pipe 22, and a plurality of watering pipes 23.
The condenser main body 21 is a box-shaped sealed container called a trunk provided with an internal space, and is maintained in a vacuum state. Further, the condenser main body 21 is connected to the steam turbine 3, and turbine exhaust is introduced from the steam turbine 3 into the upper area of the internal space. On the other hand, a hot well (pit) 211 for storing condensed water is provided in a lower area of the internal space. The recovery water pipe 11 described above is connected to the hot well 211. A pump 111 is provided in the middle of the recovery water pipe 11, and water stored in the hot well 211 is pumped up through the recovery water pipe 11 and recovered in the cooling tower 4. On the other hand, the cooling water stored in the tank 41 provided in the cooling tower 4 passes through the supply water pipe 12 due to a water head difference and is supplied to the condenser main body 21 maintained in a vacuum state.
The condenser body 21 is provided with a gas discharge pipe 212. The gas exhaust pipe 212 is for exhausting the turbine exhaust in which the steam is condensed, and the turbine exhaust in which the steam is condensed passes through the gas exhaust pipe 212 and is discharged to the outside from the gas exhaust port 212a.

  The watering mother pipe 22 is for supplying cooling water to the plurality of watering pipes 23, and the watering mother pipe 22 is installed in a lower area of the internal space. The sprinkling mother pipe 22 is connected to the above-described feed water pipe 12, and the cooling water supplied from the cooling tower 4 through the feed water pipe 12 to the direct contact condenser 2 is supplied to the sprinkling mother pipe 22.

Drawing 2 is a mimetic diagram showing the appearance of the watering pipe concerning an embodiment of the invention.
As shown in FIG. 2, the plurality of sprinkling pipes 23 are for injecting cooling water into the turbine exhaust introduced into the internal space of the condenser main body 21. It is erected in the internal space of the main body 21. Accordingly, each of the plurality of water spray pipes 23 extends from the lower area toward the upper area in the internal space of the condenser body 21.

  Drawing 3 is a mimetic diagram showing the composition of the watering pipe concerning an embodiment of the invention. 4 is a view showing the relationship between the water spray pipe main body and the opening / closing body shown in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line V-V shown in FIG. FIG. 6 is a diagram illustrating an open state and a closed state of the nozzle.

  The water spray pipe 23 according to the embodiment of the present invention is capable of closing a plurality of nozzles 24 provided in the axial direction in a stepwise manner. As shown in FIG. It is configured. As shown in FIGS. 2 and 3, a plurality of nozzles 24 are provided on the outer periphery of the water spray pipe body 25 in the axial direction (vertical direction). The plurality of nozzles 24 are for injecting cooling water evenly and uniformly into the turbine exhaust introduced into the condenser main body 21, and as shown in FIG. A plurality of stages are provided at intervals. The predetermined interval is not limited to a certain interval as long as the cooling water can be uniformly and uniformly injected into the turbine exhaust. Further, the plurality of stages are, for example, a large number of stages of about 8 to 10 stages. Further, the plurality of nozzles 24 may be arranged in a staggered manner in the axial direction (vertical direction) of the water spray pipe body 25 as shown in FIG. 2, but as shown in FIG. 3, they are arranged in a straight line in the axial direction. May be used. The plurality of nozzles 24 may have a predetermined angular difference in the circumferential direction (circumferential direction) of the water spray pipe main body 25, and draw a spiral when the plurality of nozzles 24 are sequentially traced from below to above. It may be a thing.

  The nozzle 24 is capable of injecting the cooling water in a mist-dropped state, and the cooling water introduced into the internal space of the condenser main body 21 is evenly injected and water vapor contained in the turbine exhaust. Is efficiently condensed.

  As shown in FIGS. 4 and 5, the opening / closing body 26 is for opening and closing the nozzle 24 provided in the water spray pipe main body 25, and is slightly smaller than the inner diameter of the water spray pipe main body 25 as shown in FIG. 5. It is composed of a cylindrical circular pipe having a small outer shape, and is housed inside the water spray pipe body 25 so as to be slidable in the axial direction (vertical direction). Further, a detent (not shown) is provided between the water spray pipe main body 25 and the opening / closing body 26, and the opening / closing body 26 does not circulate even if the opening / closing body 26 slides in the axial direction inside the water spray pipe main body 25. Never turn in the direction. The opening / closing body 26 may be made of a resin material such as FRP (Fiber Reinforced Plastic) in addition to the steel material. Further, as shown in FIG. 3, the opening / closing body 26 has a plurality of nozzles 24 (specifically, three nozzles 24A, 24B, 24C) provided at predetermined intervals in the axial direction of the water spray pipe body 25. However, the present invention is not limited to this, and may be provided for each nozzle 24. Further, the nozzle 24 may be opened / closed by one opening / closing body 26 for the two nozzles 24A, 24B, or one opening / closing body 26 for four or more nozzles 24A, 24B, 24C,. The nozzle 24 may be opened and closed.

  As shown in FIG. 3, through holes 27A, 27B, and 27C that open the nozzles 24A, 24B, and 24C provided in the water spray pipe body are provided on the side surface of the opening and closing body 26 for each of the nozzles 24A, 24B, and 24C. . The through holes 27A, 27B, and 27C provided for each of the nozzles 24A, 24B, and 24C allow the nozzles 24A, 24B, and 24C provided in the water spray pipe body 25 to be closed stepwise in order from the bottom. The plurality of nozzles 24 </ b> A, 24 </ b> B, 24 </ b> C on the base side close to the mother water tube 22 have different lengths in the axial direction (vertical direction) of the opening / closing body 26. In the present embodiment, as shown in FIG. 3, the through holes 27A, 27B, 27C corresponding to the at least three nozzles 24A, 24B, 24C on the base side have different lengths. Specifically, the through hole located above the reference through hole has a length that is longer in the axial direction. That is, the second through-hole 27B from the bottom of the opening / closing body is longer in the axial direction than the lowermost through-hole 27A, and the third through-hole 27C from the bottom is more axial than the second through-hole 27B from the bottom. Long in the direction.

  As shown in FIG. 6A, the through hole 27 </ b> A provided in the lowermost stage of the opening / closing body 26 is provided at a position overlapping the nozzle 24 </ b> A provided in the lowermost stage on the base side of the water spray pipe body 25. The through hole 27A provided in the lowermost stage is a circular through hole slightly larger than the inner diameter of the nozzle 24A, and the through hole 27A provided in the lowermost stage is provided in the lowermost stage on the base side of the water spray pipe body 25. By overlapping with the nozzle 24A, as shown in FIG. 4 and FIG. Opened. On the other hand, as shown in FIG. 6 (b), the through hole 27A provided in the lowermost stage of the opening / closing body 26 disengages upward from the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, thereby opening and closing. The inside of the body 26 and the outside of the water spray pipe body 25 are shut off, and the nozzle 24A provided at the lowermost stage on the base side of the water pipe main body 25 is closed.

  As shown in FIG. 3A, in the through hole 27 </ b> B provided in the second stage from the bottom of the opening / closing body 26, the through hole 27 </ b> A provided in the lowest stage is provided in the lowermost stage on the base side of the water spray pipe body 25. The nozzle 24A is provided at a position overlapping the nozzle 24B provided at the second stage on the base side of the water spray pipe main body 25 in a state of overlapping with the nozzle 24A. The through hole 27B provided in the second step from the bottom is an oblong through hole that is slightly larger than the inner diameter of the nozzle 24B and extends downward, as shown in FIGS. 3 (a) and 3 (b). The through hole 27B provided in the second stage from the top overlaps with the nozzle 24B provided in the second stage on the base side of the water spray pipe main body 25, so that the inside of the opening / closing body 26 and the outside of the water spray pipe main body 25 communicate with each other. The nozzle 24B is opened. On the other hand, as shown in FIG. 3 (c), the through hole 27B provided in the second stage from the bottom opens and closes by disengaging upward from the nozzle 24B provided in the second stage on the base side of the water spray pipe body 25. The inside of the body 26 and the outside of the water spray pipe body 25 are blocked, and the nozzle 24B is closed.

  Therefore, as shown in FIG. 3A, in the state where the through hole 27A provided in the lowermost stage of the opening / closing body 26 overlaps the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, The through hole 27B provided in the second stage from the bottom overlaps the nozzle 25B provided in the second stage on the base side of the water spray pipe body 25. As a result, the nozzle 24 </ b> A provided in the lowermost stage on the base side of the water spray pipe main body 25 and the nozzle 24 provided in the second stage on the base side are opened.

  On the other hand, as shown in FIG. 3 (b), even though the through hole 27A provided in the lowermost stage of the opening / closing body 26 is disengaged above the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, The through hole 27 </ b> B provided in the second stage from the bottom of the opening / closing body 26 maintains a state where it overlaps with the nozzle 24 </ b> B provided in the second stage on the base side of the water spray pipe body 25. As a result, the state in which the nozzle 24B provided in the second stage on the base side of the water spray pipe main body 25 is kept open while the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe main body 25 is closed.

  As shown in FIG. 3A, the through hole 27 </ b> C provided in the third stage from the bottom of the opening / closing body 26 has the through hole 27 </ b> A provided in the lowest stage provided in the lowest part on the base side of the water spray pipe body 25. The nozzle 24 </ b> A is provided at a position overlapping the nozzle 24 </ b> C provided at the third stage on the base side of the water spray pipe main body 25 in a state of overlapping with the nozzle 24 </ b> A. The through hole 27C provided in the third step from the bottom is an oval through hole that is slightly larger than the inner diameter of the nozzle 24C and extends downward, and as shown in FIG. 3A, the second step from the bottom. It extends below the through hole 27B provided in the. As shown in FIGS. 3A to 3C, the through-hole 27 </ b> C provided in the third stage from the bottom overlaps with the nozzle 24 </ b> C provided in the third stage on the base side of the water spray pipe body 25, thereby opening and closing the body. The inside of 26 and the outside of the water spray pipe main body 25 communicate with each other, and the nozzle 24C is opened. On the other hand, the through hole 27 </ b> C provided in the third stage from the bottom is disengaged above the nozzle 24 </ b> C provided in the third stage on the base side of the sprinkling pipe body 25, so that the inside of the opening / closing body 26 and the sprinkling pipe body 25 The outside is shut off, and the nozzle 24C is closed.

  Therefore, as shown in FIG. 3A, in the state where the through hole 27A provided in the lowermost stage of the opening / closing body 26 overlaps the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, The through hole 27C provided in the third stage from the bottom overlaps the nozzle 24C provided in the third stage on the base side of the water spray pipe body 25. Further, in this state, the through hole 27 </ b> B provided in the second stage from the bottom of the opening / closing body 26 overlaps with the nozzle 24 </ b> B provided in the second stage on the base side of the water spray pipe body 25.

  Further, as shown in FIG. 3 (b), even though the through hole 27A provided in the lowermost stage of the opening / closing body 26 is disengaged above the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, When the through hole 27B provided in the second stage from the bottom of the opening / closing body 26 overlaps the nozzle 24B provided in the second stage on the base side of the sprinkling pipe body 25, it is provided in the third stage from the bottom of the opening / closing body 26. The through hole 27 </ b> C overlaps with the nozzle 24 </ b> C provided at the third stage on the base side of the water spray pipe main body 25. Accordingly, the second and third nozzles 24B and 24C from the bottom can be opened in a state where the lowermost nozzle 24A is closed.

  Further, as shown in FIG. 3C, the through hole 27 </ b> B provided in the second stage from the bottom of the opening / closing body 26 is disengaged above the nozzle 24 </ b> B provided in the second stage on the base side of the water spray pipe body 25. Even in this state, the through hole 27 </ b> C provided in the third stage from the bottom of the opening / closing body 26 overlaps the nozzle 24 </ b> C provided in the third stage on the base side of the water spray pipe body 25. Thereby, the nozzle 24C of the third stage from the bottom can be opened in a state where the nozzles 24A and 24B of the second stage from the bottom and the bottom are closed.

  Further, in the state where the through hole 27C provided in the third stage from the bottom of the opening / closing body 26 is disengaged upward from the nozzle 24C provided in the third stage on the base side of the sprinkling pipe body 25, the bottom stage, the second stage from the bottom. The nozzles 24A, 24B, 24C in the third stage from the bottom can be closed.

  In the example shown in FIG. 3, the plurality of nozzles 24 provided on the water spray pipe body 25 are closed in stages by the opening and closing body 26 one by one from the bottom. However, the present invention is not limited to this. A plurality of nozzles 24 (for example, two nozzles 24) may be closed together as long as they are closed in stages.

  Further, FIG. 3 does not show an opening / closing body (not shown) for opening and closing the nozzle 24 above from the fourth step on the base side of the water spray main body 25, but the base portion of the water spray main body 25 without providing the opening / closing body. The upper nozzle 24 from the fourth side of the side may be always open. This is because the condensation efficiency is better when the nozzle 24 in the lower region of the water spray pipe body 25 is closed and the nozzle 24 in the upper region is opened. Even when the opening / closing body is provided, the upper nozzles from the fourth stage on the base side of the water spray pipe main body 25 may be closed simultaneously. This is because the number of nozzles 24 that inject cooling water can be reduced stepwise in order from the bottom by closing the nozzle 24 in the lower region of the water spray pipe body 25, and the nozzle that injects cooling water by closing the nozzle in the upper region. This is because there is no need to reduce the quantity of the products in stages.

FIG. 7 is a diagram showing a drive mechanism of the opening / closing body according to the embodiment of the present invention.
As shown in FIG. 7, a drive mechanism 28 is provided on the inner side of the water spray pipe main body 25, which is a lower area of the opening / closing body 26. The drive mechanism 28 opens and closes the nozzle 24. The drive mechanism 28 closes the nozzle 24 by sliding the opening / closing body 26 to the upper position, and slides the opening / closing body 26 to the original position (downward position). The nozzle 24 is opened.

  Any drive mechanism 28 can be employed. For example, as shown in FIG. 7, a cam 281 that slides the opening / closing body 26 to an upper position and a motor (drive source) that rotates the cam 281 (not shown). Or a handle (drive source) (not shown) for rotating the cam 281. The drive mechanism 28 is not limited to the cam 281 and the motor, and the cam 281 and the handle, but may be configured by combining a known one such as a link or a known one.

The direct contact type condenser 2 according to the embodiment of the present invention is in direct contact with the cooling tower 4 when the pressure of geothermal steam and the amount of jet of geothermal steam are attenuated from the beginning of operation after many years of operation. It is preferable that the amount of water circulating through the water device 2 is reduced, the number of nozzles 24 for injecting cooling water is reduced, and auxiliary power is reduced.
In this case, the direct contact condenser 2 according to the embodiment of the present invention closes the nozzles 24 provided in the axial direction of the water spray pipe 23 step by step in order from the lowest stage.

  Specifically, the drive mechanism 28 is operated to move the opening / closing body 26 accommodated in the water spray pipe body 25 upward. When the opening / closing body 26 is moved upward, the through-hole 27A provided in the lowermost stage of the opening / closing body 26 is disengaged upward from the nozzle 24A provided in the lowermost stage on the base side of the water spray pipe body 25, thereby opening / closing body 26. And the outside of the water spray pipe body 25 are shut off, and the nozzle 24A provided at the lowermost stage on the base side of the water pipe main body 25 is closed (see FIG. 3B). Thereby, the number of the nozzles 24 which inject cooling water decreases, and auxiliary machine power can be reduced.

  Furthermore, when the condensing capacity of the direct contact condenser 2 exceeds the pressure of geothermal steam and the amount of geothermal steam ejected, the drive mechanism 28 is operated to open and close the opening / closing body 26 accommodated in the water spray pipe body 25. Is further moved upward. When the opening / closing body 26 is further moved upward, the through hole 27B provided in the second stage from the bottom of the opening / closing body 26 is disengaged upward from the nozzle 24B provided in the second stage on the base side of the water spray pipe body 25. As a result, the inside of the opening / closing body 26 and the outside of the water spray pipe main body 25 are shut off, and the nozzle 24B provided at the second stage on the base side of the water spray pipe main body 25 is closed (see FIG. 3C). Thereby, the number of the nozzles 24 which inject cooling water decreases, and auxiliary machine power can be reduced.

  Thus, by closing the nozzles 24 provided in the axial direction of the water spray pipe 23 in a stepwise manner from the lowest stage, it is possible to reduce the number of nozzles 24 that inject cooling water.

As described above, according to the direct contact condenser 2 according to the embodiment of the present invention, the water spray pipe body 25 is formed in a slidable cylinder shape and has the opening / closing body 26 that opens and closes the nozzle 24. The number of nozzles 24 that inject cooling water can be reduced.
In addition, since the nozzle 24 can be closed without stopping the operation, when the pressure of the geothermal steam or the amount of jet of the geothermal steam is attenuated, the cooling tower 4 and the cooling tower 4 are stopped without stopping the operation of the condenser. The amount of cooling water circulating through the direct contact condenser 26 can be reduced, the number of nozzles 24 for injecting cooling water can be reduced, and auxiliary power can be reduced.

  Further, if the opening / closing body 26 closes the nozzle 24 when the pump 111 is tripped, water injection (a situation in which cooling water flows into the steam turbine 3) can be suppressed.

  Further, when the opening / closing body 26 is made of a resin material such as FRP, the opening / closing body 26 becomes lighter, so that the drive mechanism 28 can be configured relatively easily. In addition, since the resin material such as FRP is excellent in corrosion resistance, it is not necessary to consider the corrosion of the opening / closing body 26.

  In the above-described embodiment, the opening / closing body 26 is accommodated in the water spray pipe body 25. However, the opening / closing body may be provided so as to slide on the outer periphery of the water spray pipe body 25. In this way, the drive mechanism can be easily provided, and the drive mechanism can be easily operated.

  The direct contact condenser according to the present invention can reduce the number of nozzles for injecting cooling water without stopping the operation. This is suitable for a direct contact condenser installed in a geothermal power plant in which the amount of squirting can be attenuated.

DESCRIPTION OF SYMBOLS 11 Recovery water pipe 111 Pump 12 Supply water pipe 2 Direct contact type condenser 21 Condenser main body 211 Hot well 212 Gas exhaust pipe 212a Gas exhaust port 22 Water sprinkling mother pipe 23 Water sprinkling pipe 24 Nozzle 25 3 Steam turbine 28 Drive mechanism 281 Cam 4 Cooling tower 41 Tank

Claims (6)

A condenser body in which an internal space is provided and turbine exhaust is introduced into the internal space;
A water sprinkling pipe which is erected in the internal space of the condenser main body and sprays cooling water to the turbine exhaust introduced into the internal space of the condenser main body;
With
The watering pipe is
A water spray pipe main body provided with a plurality of nozzles for injecting the cooling water at intervals in the axial direction;
An opening / closing body that is formed in a cylindrical shape that is slidable relative to the water spray pipe body, and that opens and closes the nozzle;
A drive mechanism for sliding the opening and closing body and opening and closing the nozzle;
A direct contact condenser, characterized by comprising: The opening and closing body is
The direct contact condenser according to claim 1, wherein a plurality of nozzles provided at intervals in the axial direction are sequentially closed from below. The opening and closing body is
3. The direct contact condenser according to claim 1, wherein the direct contact condenser is configured as a single body that simultaneously closes at least two of a plurality of nozzles provided at intervals in the axial direction. The opening and closing body is
The direct contact condenser according to claim 1 or 2, wherein the direct contact condenser is configured by an individual body that individually closes a plurality of nozzles provided at intervals in the axial direction. The opening and closing body is
The direct contact type condensate according to any one of claims 1 to 4, wherein only a nozzle provided in a lower region among a plurality of nozzles provided at intervals in the axial direction is closed. vessel. The opening and closing body is
A first through hole that overlaps with a first nozzle provided in the sprinkling pipe body;
In a state where the first nozzle and the first through hole overlap with each other, the first nozzle overlaps with a second nozzle provided in an upper region of the first nozzle, and the first through hole serves as the first nozzle. A second through hole that overlaps with the second nozzle even when detached from the second nozzle,
The direct contact condenser according to claim 1, comprising:

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