JP2010196956A - Condensation unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure sufficient cooling water quantity all the time in regard to a condensation unit for cooling and condensing steam as exhaust from a steam turbine for condensation in a thermal power station. <P>SOLUTION: With a first condensation part first inlet valve 46 opened, a first condensation part second inlet valve 47 closed, a first condensation part first outlet valve 48 opened, a first condensation part second outlet valve 49 closed, a cooling water pump 21 operated and cooling water flowing in the direction shown by the arrow A1, when switching operation is performed, the first condensation part first outlet valve 48 becomes closed, the first condensation part first inlet valve 46 closed, the first condensation part second inlet valve 47 opened and the first condensation part second outlet valve 49 opened. Thus, in a first condensation part 17, the cooling water is made to flow in the direction reverse to the arrow A1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a condensate unit for cooling, condensing, and condensing steam as exhaust from a steam turbine in, for example, a thermal power plant.

  Conventionally, in a thermal power plant, as shown in FIG. 5 and FIG. 6, steam as exhaust from a steam turbine constituting the turbine part flows into the condenser 101 through the exhaust chamber, and the first condensate part. It cools by the cooling pipe (not shown) which comprises 102 and the 2nd condensate part 103, is condensed, and turns into water.

  The cooling water is taken from the intake channel Sa by the cooling water supply unit and supplied to the first condensate unit 102 and the second condensate unit 103. As shown in FIGS. 5 and 6, the cooling water supply unit includes cooling water pumps 104 and 105 for taking, for example, seawater as cooling water from the intake channel Sa, and first cooling water pumps for flowing cooling water. 1 inflow pipes 107, 108, 111, first outflow pipes 112, 114, second inflow pipes 116, 117, 118, second outflow pipes 119, 121, and connection pipes 109, 113, 122, respectively, A first condensate inlet valve 124, a first condensate outlet valve 125, a second condensate inlet valve 126, a second condensate outlet valve 127, and communication valves 129 and 131 for opening and closing the flow path. And have.

  Here, the first inflow pipe 108 is connected to the downstream end of the first inflow pipe 107 into which, for example, seawater taken in from the intake passage Sa by the cooling water pump 104 flows, and the downstream side of the first inflow pipe 108. A first inflow pipe 111 and a communication pipe 109 are connected to the ends. The downstream end of the first outflow pipe 112 is connected to the first outflow pipe 114 and the connection pipe 113, and the cooling water is discharged into the water discharge passage Sb through the first outflow pipe 114.

  In addition, a second inflow pipe 117 is connected to a downstream end of the second inflow pipe 116 into which seawater taken from the intake passage Sa by the cooling water pump 105 flows, and a downstream end of the second inflow pipe 117. The second inflow pipe 118 and the connection pipe 113 are connected to the main body. A second outflow pipe 121 and a communication pipe 109 are connected to the downstream end of the second outflow pipe 119, and the cooling water is discharged into the water discharge passage Sb through the second outflow pipe 121. In addition, the connection location of the 1st inflow piping 107 and 108 and the connection location of the 2nd inflow piping 116 and 117 are connected by the connection piping 122. FIG.

  The first condensate section inlet valve 124 is disposed on the cooling water flow path of the first inflow pipe 108, and the first condensate section outlet valve 125 is disposed on the cooling water flow path of the first outflow pipe 114. Has been. The second condensate inlet valve 126 is arranged on the cooling water flow path of the second inflow pipe 117, and the second condensate outlet valve 127 is on the cooling water flow path of the second outflow pipe 121. Is arranged. The communication valve 129 is disposed on the cooling water flow path of the communication pipe 109, and the communication valve 131 is disposed on the cooling water flow path of the communication pipe 113.

  Normally, as shown in FIG. 5, the first condenser inlet valve 124 is opened, the first condenser outlet valve 125 is opened, the second condenser inlet valve 126 is opened, and the second condenser is opened. By operating the cooling water pumps 104 and 105 with the water outlet valve 127 open and the communication valves 129 and 131 closed, the first condensing part 102 has a second condensing part facing left in the figure. The cooling water flows through 103 to the right in the figure.

  By the way, when the cooling water is allowed to flow only in one direction, dirt or clogging occurs. For example, deposits caused by inorganic substances or living organisms contained in the cooling water accumulate. For this reason, cleaning (backwashing) is performed by reversing the direction of the flow of cooling water for a predetermined time (for example, approximately 20 minutes) every predetermined period (for example, every 1 to 2 days) (for example, Patent Documents). 1). For example, when backwashing the first condensate unit 102, as shown in FIG. 6, the first condensate unit inlet valve 124 is closed, the first condensate unit outlet valve 125 is closed, and the second condensate unit inlet is closed. By opening the valve 126, opening the second condensing part outlet valve 127, and opening the communication valves 129 and 131, both the first condensing part 102 and the second condensing part 103 are Cooling water flows to the middle right. Backwashing is performed alternately between the first condensing unit 102 and the second condensing unit 103. At this time, there is only one cooling water flow path.

JP 2005-326083 A

  However, at the time of backwashing, the amount of cooling water is reduced, and the absolute value (vacuum degree) of the pressure in the condenser 101 is deteriorated (vacuum degree is lowered), so it is necessary to suppress the output. For example, at a rating of 500 MW, it must be 300 MW or less during backwashing.

  An object of the present invention is to provide a condensate unit that can solve the above-described problems and can always secure a sufficient amount of cooling water.

  In order to solve the above problems, the invention of claim 1 comprises at least a pair of condensate parts through which cooling water flows, and cooling water supply means for supplying cooling water to the condensate parts, A condensate unit for heat-exchanged steam with cooling water by a condensate unit for cooling, condensing and condensing the cooling water, wherein the cooling water supply means converts the cooling water taken from a water intake source into the condensate A first flow path for flowing the water in the first section along the first direction and discharging water to the water discharge destination, and cooling water taken from the water intake source in the condensate section opposite to the first direction. It is characterized by having for each said condensing part a flow path switching means for switching between the second flow path for allowing water to flow along the second direction and discharging water to the water discharge destination.

  In the first aspect of the invention, the flow path switching means for each condensing part allows the cooling water taken from the water intake source to flow along the first direction in the condensate part and to discharge the water to the water discharge destination. The second flow for allowing the cooling water taken from the first flow path and the water intake source to flow through the condensate portion along the second direction opposite to the first direction and to discharge to the water discharge destination. Switch between roads.

  Invention of Claim 2 is a condensate unit of Claim 1, Comprising: The cooling water of a counterflow is each circulated through the said condensate part, and the said condensate part is the introduction direction of steam | vapor. The cooling water supply means includes a pump device for passing cooling water from the water intake source through the condensate unit to the water discharge destination, and cooling water taken from the water intake source. From the first end or the second end of the condensate part, and cooling water from the second end or the first end of the condensate part. First as the flow path switching means for selecting one of the second pipe for flowing out to the water discharge destination and the first end and the second end as the cooling water inflow destination. For selecting one of the second end and the first end as a cooling water outflow source A second valve device as Kiryuro switching means, is characterized by having independently for each of the condensing unit.

  According to the first aspect of the present invention, the flow path switching means for each condensing part causes the cooling water taken from the water intake source to flow along the first direction in the condensate part, and discharges it to the water discharge destination. And a second channel for discharging the cooling water taken from the water intake source along the second direction opposite to the first direction and discharging the water to the water discharge destination. Therefore, it is possible to always secure a sufficient amount of cooling water.

  According to the invention of claim 2, the first valve device for selecting one of the first end and the second end as the cooling water inflow destination, and the second end as the cooling water outflow source Since the second valve device for selecting one of the first end and the first end is provided independently for each condensing unit, a sufficient amount of cooling water can always be ensured reliably. .

It is explanatory drawing for demonstrating the structure of the thermal power generation equipment which concerns on one embodiment of this invention. It is a figure which shows the structure of the condensing unit of the thermal power generation equipment. It is explanatory drawing for demonstrating the structure and operation | movement of the same condensate unit. It is explanatory drawing for demonstrating the structure and operation | movement of the same condensate unit. It is explanatory drawing for demonstrating a prior art. It is explanatory drawing for demonstrating a prior art.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram for explaining the configuration of a thermal power generation facility according to an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of a condensing unit of the thermal power generation facility, and FIGS. It is explanatory drawing for demonstrating the structure and operation | movement of the same condensate unit.

  As shown in FIG. 1, a thermal power generation facility 1 according to an embodiment of the present invention includes, for example, a generator 2, a feed water pump 3, and a boiler unit 4 that generates superheated steam by supplying compressed water from the feed water pump 3. A steam turbine, supplied with steam from the boiler unit 4, a turbine unit 5 for driving the generator 2, and a condensate unit 6 that condenses and condenses exhaust gas from the turbine unit 5 and sends it to the feed water pump 3 side. And a deaerator 7.

  As shown in FIGS. 1 to 4, the condensate unit 6 includes a condenser 9, a cooling water supply unit 11, and a condensate pump 12. As shown in FIG. 2, the condenser 9 includes a first condensing unit 17 and a second condensing unit 18. Steam as exhaust from the steam turbine 14 constituting the turbine unit 5 flows into the condenser 9 through the exhaust chamber 15, and the cooling pipes (non-condensation) constituting the first condensate unit 17 and the second condensate unit 18. It is cooled and condensed to become water.

  As shown in FIGS. 3 and 4, the cooling water supply unit 11 includes cooling water pumps 21 and 22 for taking, for example, seawater as cooling water from the intake channel Qa, 1st inflow piping 23, 24, 1st branch piping 25, 26, 1st inlet piping 27, 28, 1st outflow piping 29, 31, 32, 2nd inflow piping 34, 35, 2nd branch piping 36, 37, The second inlet pipes 38, 39, the second outlet pipes 41, 42, 43, and the connecting pipe 44, respectively, a first condensate section first inlet valve 46 for opening and closing the cooling water passage, Condensate part second inlet valve 47, first condensate part first outlet valve 48, first condensate part second outlet valve 49, second condensate part first inlet valve 51, second condensate part second inlet It has a valve 52, a second condensing part first outlet valve 53, and a second condensing part second outlet valve 54.

  Here, the first inflow pipe 24 is connected to the downstream end of the first inflow pipe 23 into which, for example, seawater taken in from the intake channel Qa by the cooling water pump 21 flows, and the downstream side of the first inflow pipe 24. First branch pipes 25 and 26 are connected to the ends. A first inlet pipe 27 connected to one end of the first condensate part 17 and a first outlet pipe 32 are connected to the downstream end of the first branch pipe 25. A first inlet pipe 28 connected to the other end of the first condensate part 17 and a first outlet pipe 29 are connected to the downstream end of the first branch pipe 26. The downstream end portions of the first outflow pipes 29 and 32 are connected to the first outflow pipe 31, and the cooling water is discharged into the water discharge channel Qb through the first outflow pipe 31.

  A second inflow pipe 35 is connected to the downstream end of the second inflow pipe 34 into which seawater taken from the intake channel Qa by the cooling water pump 22 flows, and the downstream end of the second inflow pipe 35 is connected. Are connected to the second branch pipes 36 and 37. A second inlet pipe 38 connected to one end of the second condensate part 18 and a second outlet pipe 43 are connected to the downstream end of the second branch pipe 36. A second inlet pipe 39 connected to the other end of the second condensate part 18 and a second outlet pipe 41 are connected to the downstream end of the second branch pipe 37. The downstream end portions of the second outflow pipes 41 and 43 are connected to the second outflow pipe 42, and the cooling water is discharged into the water discharge channel Qb through the second outflow pipe 42. In addition, the connection location of the 1st inflow piping 23 and 24 and the connection location of the 2nd inflow piping 34 and 35 are connected by the connection piping 44. FIG.

  The first condensate section first inlet valve 46 is disposed on the cooling water flow path of the first branch pipe 25, and the first condensate section second inlet valve 47 is the cooling water flow path of the first branch pipe 26. It is arranged on the route. The first condensate section first outlet valve 48 is disposed on the cooling water flow path of the first outlet pipe 29, and the first condensate section second outlet valve 49 is the cooling water of the first outlet pipe 32. It is arranged on the flow path. The second condensate section first inlet valve 51 is disposed on the cooling water flow path of the second branch pipe 36, and the second condensate section second inlet valve 52 is the cooling water of the second branch pipe 37. It is arranged on the flow path. The second condensate section first outlet valve 53 is disposed on the cooling water flow path of the second outlet pipe 41, and the second condensate section second outlet valve 54 is the cooling water of the second outlet pipe 43. It is arranged on the flow path.

  As shown in FIG. 3, the first condensate section first inlet valve 46 is opened, the first condensate section second inlet valve 47 is closed, the first condensate section first outlet valve 48 is opened, When the 1st condensing part 2nd exit valve 49 is made into a closed state and the cooling water pump 21 is drive | operated, a cooling water flows through the 1st condensing part 17 in the direction shown by arrow A1. Further, as shown in FIG. 4, the first condensate section first inlet valve 46 is closed, the first condensate section second inlet valve 47 is opened, and the first condensate section first outlet valve 48 is closed. By operating the cooling water pump 21 with the first condensing part second outlet valve 49 opened, the cooling water flows through the first condensing part 17 in the direction indicated by the arrow A2.

  As shown in FIGS. 3 and 4, the second condensate section first inlet valve 51 is opened, the second condensate section second inlet valve 52 is closed, and the second condensate section first outlet valve 53 is closed. Is opened, and the cooling water pump 22 is operated with the second condensing part second outlet valve 54 closed, so that cooling water flows through the second condensing part 18 in the direction indicated by the arrow B1. To do.

  Switching of the flow path of the cooling water supplied to the first condensate unit 17 (second condensate unit 18) is controlled by a control device (not shown) such as the first condensate unit first inlet valve 46 and the like (first 2 is performed by opening and closing the valve device of the second condensing section first inlet valve 51 and the like. In this embodiment, the direction of the flow of the cooling water is reversed in the first condensate unit 17 and the second condensate unit 18 by switching at a predetermined cycle (for example, 1 to 2 days).

  Next, the cooling water passage switching method of this embodiment will be described with reference to FIGS. First, as shown in FIG. 3, the first condensate section first inlet valve 46 is open, the first condensate section second inlet valve 47 is closed, and the first condensate section first outlet valve 48 is open. It is assumed that the first condensing unit second outlet valve 49 is closed and the cooling water pump 21 is operated. In this case, cooling water flows through the first condensate unit 17 in the direction indicated by the arrow A1. That is, seawater as cooling water taken from the water intake channel Qa by the cooling water pump 21 flows through the first inflow pipes 23, 24, the first branch pipe 25, and the first inlet pipe 27, and the first condensing part. 17 flows from one end side, flows in the direction indicated by arrow A1, cools the steam (exchanges heat with the steam), flows out from the other end side of the first condensate unit 17, The first outlet pipes 29 and 31 are passed through and discharged into the water discharge channel Qb.

  At the same time, as shown in FIG. 3, the second condensate section first inlet valve 51 is open, the second condensate section second inlet valve 52 is closed, and the second condensate section first outlet valve 53 is open. And the 2nd condensing part 2nd exit valve 54 shall be in a closed state, and the cooling water pump 22 shall be drive | operated. In this case, the cooling water flows through the second condensate unit 18 in the direction indicated by the arrow B1. That is, seawater as cooling water taken from the intake channel Qa by the cooling water pump 22 flows through the second inflow pipes 34 and 35, the second branch pipe 36, and the second inlet pipe 38, so that the second condensing part 18 flows from one end side, flows in the direction shown by arrow B1, cools the steam (exchanges heat with the steam), flows out from the other end side of the second condensate section 18, The second outflow pipes 41 and 42 are passed through and discharged into the water discharge channel Qb.

  Next, the case where the direction of the flow of the cooling water is reversed in the first condensate unit 17 from the state shown in FIG. 3 will be described. For example, when the switching operation is performed, as shown in FIG. 4, first, the first condensing unit first outlet valve 48 is closed, and then the first condensing unit first inlet valve 46 is closed. It is said. Next, the first condensate part second inlet valve 47 is opened, and then the first condensate part second outlet valve 49 is opened. Thereby, the cooling water flows through the first condensate unit 17 in the direction indicated by the arrow A2. That is, seawater as cooling water taken from the water intake channel Qa by the cooling water pump 21 flows through the first inflow pipes 23 and 24, the first branch pipe 26, and the first inlet pipe 28, and the first condensing part. 17 flows from the other end side, flows in the direction shown by arrow A2, cools the steam (exchanges heat with the steam), flows out from one end side of the first condensate unit 17, The first outflow pipes 32 and 31 are passed through and discharged into the water discharge channel Qb.

  The case where the direction of the flow of the cooling water is reversed in the first condensate unit 17 from the state shown in FIG. 4 will be described. For example, when the switching operation is performed, as shown in FIG. 3, first, the first condensing part second outlet valve 49 is closed, and then the first condensing part second inlet valve 47 is closed. It is said. Next, the first condensate section first inlet valve 46 is opened, and then the first condensate section first outlet valve 48 is opened. Thereby, the cooling water flows through the first condensate unit 17 in the direction indicated by the arrow A1. That is, seawater as cooling water taken from the water intake channel Qa by the cooling water pump 21 flows through the first inflow pipes 23, 24, the first branch pipe 25, and the first inlet pipe 27, and the first condensing part. 17 flows from one end side, flows in the direction indicated by arrow A1, cools the steam (exchanges heat with the steam), flows out from the other end side of the first condensate unit 17, The first outlet pipes 29 and 31 are passed through and discharged into the water discharge channel Qb.

  Next, the case where the direction of the flow of the cooling water is reversed in the second condensing unit 18 from the state shown in FIGS. 3 and 4 will be described. For example, when the switching operation is performed, first, the second condensing unit first outlet valve 53 is closed, then the second condensing unit first inlet valve 51 is closed, and then the second condensing unit first outlet valve 53 is closed. The second condensate part second inlet valve 52 is opened, and then the second condensate part second outlet valve 54 is opened. Thereby, the cooling water flows through the second condensate portion 18 in the direction opposite to the arrow B2. That is, seawater as cooling water taken from the intake channel Qa by the cooling water pump 22 flows through the second inflow pipes 34 and 35, the second branch pipe 37, and the second inlet pipe 39, so that the second condensing part 18 flows from the other end side, flows in the direction opposite to the arrow B2, cools the steam (exchanges heat with the steam), flows out from one end side of the second condensate portion 18, and enters the second inlet pipe 38, The second outlet pipes 43 and 42 are passed through and discharged into the water discharge channel Qb.

  The case where the direction of the flow of the cooling water is reversed in the second condensate unit 18 from this state to the state shown in FIGS. 3 and 4 will be described. For example, when a switching operation is performed, first, the second condensing unit second outlet valve 54 is closed, then the second condensing unit second inlet valve 52 is closed, and then the second condensing unit second outlet valve 54 is closed. The second condensate section first inlet valve 51 is opened, and then the second condensate section first outlet valve 53 is opened. As a result, seawater as cooling water taken from the intake channel Qa by the cooling water pump 22 flows through the second inflow pipes 34, 35, the second branch pipe 36, and the second inlet pipe 38, and the second condensate. It flows into the part 18 from one end side, flows in the direction shown by the arrow B2, cools the steam (exchanges heat with the steam), flows out from the other end side of the second condensate part 18, and enters the second inlet pipe 39. Then, the second outflow pipes 41 and 42 are passed through and discharged into the water discharge channel Qb.

  In this embodiment, the reversal of the flow direction of the cooling water in the first condensate unit 17 and the second condensate unit 18 is performed substantially simultaneously so that the cooling water becomes a counter flow. Thereby, the water temperature rise along the flow direction (length direction) is compensated. Thereafter, in the first condensate unit 17 and the second condensate unit 18, the direction of the flow of the cooling water is reversed approximately periodically. Thereby, the dirt and clogging in the cooling pipe of the 1st condensing part 17 and the 2nd condensing part 18 are always removed. That is, it is not necessary to perform the cleaning process specially as in the prior art.

  Thus, according to the configuration of this embodiment, the cooling water is distributed to the first condensate unit 17 and the second condensate unit 18 through the communication valve at the time of washing (back washing) as in the prior art. Therefore, the first cooling water flow path corresponding to the first condensate part 17 and the second condensate part 18 is always secured. In the water part 17 and the second condensate part 18, a sufficient amount of cooling water can always be secured. For this reason, the absolute value (vacuum degree) of the pressure in the condenser 9 can always be kept favorable, and output suppression can be avoided.

  Moreover, in the 1st condensate part 17 and the 2nd condensate part 18, since the direction of the flow of cooling water is periodically reversed, the 1st condensate part 17 and the 2nd condensate part 18 Dirt and clogging in the cooling pipe can be always removed. That is, it is not necessary to perform the cleaning process specially as in the prior art. Therefore, the recovery operation that has been performed in the prior art is also unnecessary. For this reason, the switching frequency can be reduced.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the gist of the present invention. Is included in the present invention. For example, in the above-described embodiment, the case where the condenser has two condensing parts, that is, a single first condensing part and a single second condensing part has been described. Not limited to three or more. For example, a plurality of first condensing units and a plurality of second condensing units may be provided. Here, the pipes may be provided independently corresponding to the plurality of first condensing units (second condensing units), or some of them may be common. Further, instead of switching at a predetermined cycle (for example, 1st to 2nd), switching may be performed according to the situation such as the degree of contamination. Further, the flow time (period) may be changed depending on the direction of flow of the cooling water. The switching may be performed manually or automatically. Further, the communication pipe may be eliminated, or a valve device for opening and closing the flow path may be disposed in the flow path. In addition to the case of a new installation, the existing equipment may be refurbished so as to be completely divided into two systems. The cooling water pump may also be provided on the outflow side. Moreover, the direction of the flow of the cooling water in the first condensate unit 17 and the second condensate unit 18 may be reversed at the same time, or may be reversed separately. In any case, the cooling water flow path can be switched independently. The direction of the cooling water flow in the first condensate unit 17 and the second condensate unit 18 is independently reversed, so that it is not necessary to wash alternately as in the prior art, and the operational flexibility is increased. Can be secured.

  It can be applied to combined cycle power generation facilities as well as steam power generation facilities. It can also be applied to nuclear power plants as well as thermal power plants. In addition to the ocean, the cooling water intake source and the water discharge destination can also be applied to rivers, lakes, and the like.

1 Thermal Power Generation Equipment 6 Condensation Unit 9 Condenser 11 Cooling Water Supply Unit (Cooling Water Supply Means)
17 First Condensate Department (Condensate Department)
18 Second Condensate Department (Condensate Department)
21, 22 Cooling water pump (pump device)
23, 24 First inflow piping (first piping)
25, 26 First branch pipe (first pipe)
27, 28 First inlet pipe (first pipe or second pipe)
29, 31, 32 First outflow pipe (second pipe)
34, 35 Second inflow piping (first piping)
36, 37 Second branch pipe (first pipe)
38, 39 Second inlet pipe (first pipe or second pipe)
41, 42, 43 Second outflow pipe (second pipe)
44 Connection piping (first piping)
46 1st condensing part 1st inlet valve (a part of flow-path switching means, 1st valve apparatus)
47 1st condensing part 2nd inlet valve (a part of flow-path switching means, 1st valve apparatus)
48 1st condensing part 1st outlet valve (a part of flow-path switching means, 2nd valve apparatus)
49 1st condensing part 2nd outlet valve (a part of flow-path switching means, 2nd valve apparatus)
51 2nd condensing part 1st inlet valve (a part of flow-path switching means, 1st valve apparatus)
52 2nd condensing part 2nd inlet valve (a part of flow-path switching means, 1st valve apparatus)
53 2nd condensing part 1st outlet valve (a part of flow-path switching means, 2nd valve apparatus)
54 2nd condensing part 2nd outlet valve (a part of flow-path switching means, 2nd valve apparatus)
Qa intake channel (intake source)
Qb Water discharge channel (water discharge destination)

Claims (2)

Comprising at least a pair of condensate parts through which cooling water flows, and cooling water supply means for supplying cooling water to the condensate part, and cooling the steam by heat exchange with the cooling water by the condensate part, A condensate unit for condensing and condensing,
The cooling water supply means includes a first flow path for allowing cooling water taken from a water intake source to flow through the condensate portion along a first direction and discharging the water to a water discharge destination, and the water intake source. Switching between the second water flow path for discharging the cooling water taken from the water through the condensate portion along the second direction opposite to the first direction and discharging the water to the water discharge destination. A condensing unit comprising a means for each condensing unit. The condensate section is circulated with counter-flow cooling water, and the condensate section is arranged in parallel with the steam introduction direction.
The cooling water supply means includes a pump device for allowing cooling water to flow from the water intake source to the water discharge destination through the condensate unit;
A first pipe for allowing cooling water taken from the water intake source to flow in from the first end or the second end of the condensing part;
A second pipe for flowing cooling water from the second end of the condensate part or the first end to the water discharge destination;
A first valve device as the flow path switching means for selecting one of the first end and the second end as the cooling water inflow destination, and the second as the cooling water outflow source The second valve device as the flow path switching means for selecting one of the end portion and the first end portion is independently provided for each condensing portion. Condensate unit as described in.

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