JP2019082270A - Condenser cooling equipment of power generating plant, and back washing operation method - Google Patents

Abstract

To optimize reduction in amount of cooling piping and arrangement work thereof in condenser cooling equipment of a power generating plant.SOLUTION: Condenser cooling equipment of a power generating plant comprises: a first side pipe bundle and a second side pipe bundle, which are disposed in each of a plurality of condensers; a first side water chamber and a second side water chamber, which are connected to the first side pipe bundle and the second side pipe bundle, respectively; connecting pipes connecting the first side water chambers to each other and the second side water chambers to each other in adjacent condensers among the plurality of condensers; a header pipe supplying water for cooling; a supply branch pipe connecting side faces of the first side water chamber and the second side water chamber, which are disposed in the closest condenser to the water supply pipe side among the plurality of condensers, to the supply header pipe, respectively; a discharge header pipe discharging the water; and a discharge branch pipe connecting side faces of the first side water chamber and the second side water chamber, which are disposed in the closest condenser to the water discharge pipe side among the plurality of condensers, to the discharge header pipe, respectively.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to a condenser cooling system and a backwash operation method of a thermal power or nuclear power plant for cooling steam in a condenser.

  The condenser cooling equipment of a thermal power or nuclear power plant is equipment which cools the steam discharged from the steam turbine with seawater or the like. In the condenser, a large number of cooling pipes are accommodated as a cooling pipe bundle (hereinafter simply referred to as a “tube bundle”), and water such as seawater is passed through each cooling pipe. The steam discharged into the condenser is cooled in the cooling pipe and returned to the condensate.

  In a power plant that uses seawater as a cooling source, marine organisms attached to equipment upstream of the cooling pipe that constitutes the pipe bundle during operation and the inner wall of the cooling pipe peel off and ride on the water flow, and the cooling pipe inlet end And may cause clogging in the tube. In order to remove this sea life, there are many plants that enable backwash operation in which cooling water in a cooling pipe is flowed in reverse to that during normal operation.

  In the backwashing operation of the condenser cooling system, the flow of water in the cooling pipe is reversed, so the flow of water once stops at the transition from the normal operation to the backwashing operation. At this time, the cooling capacity of the condenser cooling system temporarily decreases, and the condenser vacuum deteriorates. Therefore, in the condenser cooling system that enables the backwashing operation, in order to suppress the decrease in the cooling capacity as much as possible, the configuration is considered such that the backwashing can be performed in order without backwashing all the pipe bundles simultaneously. For this reason, the condenser cooling system has a configuration in which cooling pipes such as a cooling water supply pipe, a discharge pipe, and a branch pipe, valves and the like are combined in a complicated manner.

JP, 2014-159883, A Unexamined-Japanese-Patent No. 2-169806

  In conventional condenser cooling equipment, in order to enable backwashing operation, each condenser has a pair of tube bundles, and water chambers are provided at both ends of each tube bundle, and there is cooling water for large diameter piping there Supply piping and discharge piping are connected separately. Therefore, although four large-bore pipes are disposed per condenser, usually, a large number of large-bore pipes are limited around the condenser because a plurality of condensers are adjacent to each other. It will be arranged in space. For this reason, it is necessary to excavate the floor surface at the lowermost part of the turbine building where the condenser is installed, and adopt a layout in which these large diameter pipes are embedded.

  Under such circumstances, the cost of civil engineering work for drilling and burial will be great, as well as the amount of piping, and in addition, installation of the lower floor equipment such as a condenser can not be started until the completion of burial of piping. Due to restrictions on the construction process, the construction period has been delayed.

  The condenser cooling installation of the power plant concerning this embodiment makes it a subject to carry out efficiency reduction of physical quantity of cooling piping, and arrangement operation. Moreover, the condenser cooling installation and the backwashing operation method of the power generation plant according to the present embodiment have an object of enabling the backwashing operation while improving the efficiency of the work of reducing the physical quantity of the cooling pipe and the arrangement operation.

  In order to solve the problems described above, the condenser cooling system of the power plant according to the present embodiment provided with the tube bundle disposed in the condenser and the water chambers connected to both ends of the tube bundle is a plurality of recovery units. A first side pipe bundle disposed on each condenser of the water tank and a second side pipe bundle, and a first side connected to each of the first side pipe bundle and the second side pipe bundle Pipe for connecting the water chambers on the first side and the water chambers on the second side of the condensers adjacent to each other among the plurality of water chambers and the water chambers on the second side A feed main pipe for supplying water for cooling, and a water chamber on the first side and a water chamber on the second side of the plurality of condensers disposed in the condenser closest to the feed water pipe Of the feed branch pipe respectively connecting the side surface of the pipe and the feed main pipe, the discharge main pipe for discharging the water, and the condenser on the side closest to the water discharge pipe among the plurality of condensers. A discharge branch pipe first side of the water chamber and the second side and the side surface of the water chamber and the discharge header tube connected respectively, characterized by comprising a.

  The backwash operation method according to the present embodiment in a condenser cooling system including a first side pipe bundle and a second side pipe bundle disposed in each of the plurality of condensers is the above-described problem. In order for the water to flow in the opposite direction to each other between the tube bundle on the first side and the tube bundle on the second side, or the tube bundle on the first side and the tube bundle on the second side. And controlling the flow direction of the water so that the water flows in the same direction.

  According to the condenser cooling facility of the power generation plant according to the present embodiment, it is possible to reduce the amount of material in the cooling pipe and the installation work efficiently. Further, according to the condenser cooling system and the backwashing operation method of the power generation plant according to the present embodiment, the backwashing operation can be performed while reducing the amount of material in the cooling pipe and arranging work.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the structure of the condenser cooling installation of the power generation plant which concerns on 1st Embodiment. (A), (B) is an XY side view showing a configuration of a condenser cooling system according to the first embodiment, (C), (D) is a condenser cooling system according to the first embodiment The YZ side view which shows the structure of these. An XY side view showing an example of composition of a tube bundle and a water room with which a condenser cooling installation concerning a 1st embodiment is equipped. (A), (B) is a perspective view which shows operation | movement of the condenser cooling installation which concerns on 1st Embodiment. The perspective view which shows the structure of the condenser cooling installation of the power generation plant which concerns on 2nd Embodiment. (A), (B) is an XY side view showing a configuration of a condenser cooling system according to the second embodiment, (C), (D) is a condenser cooling system according to the second embodiment The YZ side view which shows the structure of these. (A), (B) is a perspective view which shows operation | movement of the condenser cooling installation which concerns on 2nd Embodiment. The perspective view which shows the structure of the condenser cooling installation of the power generation plant which concerns on 3rd Embodiment. (A) is an X-Y side view showing a configuration example of a tube bundle, a water chamber, and a cooling pipe provided in a condenser cooling facility according to a third embodiment, (B) is a recovery according to the third embodiment YZ side view which shows the structural example of the tube bundle, water chamber, and cooling piping with which water cooler cooling installation is equipped. The perspective view which shows the structure of the cooling water piping in the conventional condenser cooling installation. (A) and (B) are XY side views which show the structural example of the tube bundle arrangement | positioning in the conventional condenser.

  A condenser cooling system of a thermal power or nuclear power plant according to the present embodiment will be described with reference to the attached drawings.

  Condenser cooling equipment for the conventional condenser is the condenser cooling equipment 111 of the upper and lower two-split tube bundle arrangement shown in FIG. 11 (A) and the condenser cooling equipment of the vertically long tube bundle arrangement shown in FIG. 11 (B) It is divided roughly into 112. An embodiment applied to the upper and lower two-segmented tube bundle arrangement will be described as the first embodiment, and an embodiment applied to the vertically long tube bundle arrangement will be described as the second and third embodiments.

1. First embodiment 1-1. Configuration FIG. 1 is a perspective view showing a configuration of a condenser cooling system of a power generation plant according to a first embodiment. FIG. 2: (A), (B) is a XY side view which shows the structure of the condenser cooling installation which concerns on 1st Embodiment. FIG.2 (C), (D) is a YZ side view which shows the structure of the condenser cooling installation which concerns on 1st Embodiment.

  FIG. 1 shows a condenser cooling system 11 according to a first embodiment corresponding to m (m = 2, 3,...) Rm, for example, two condensers R1 and R2. Condenser cooling equipment 11 includes a water chamber 3 provided at both ends of a tube bundle in condensers R1 and R2, a connecting pipe 4 connecting water chambers 3 with each other, a supply main pipe 5 for supplying cooling water, The supply branch pipe 6 connecting the supply main pipe 5 and the water chamber 3, the discharge branch pipe 7 connecting the water chamber 3 and the discharge main pipe 8, the discharge main pipe 8 discharging the hot water after cooling, the supply branch pipe 6 and a valve 9 provided on the discharge branch pipe 7 are provided. Hereinafter, the case of m = 2 will be described except for the case where particular mention is made, but it is not limited to that case. Further, the arrangement direction of the two condensers R1 and R2 is defined as the X axis direction, and the vertically upward direction is defined as the Y axis direction, ie, the direction in which the tube bundle 2 extends, that is, in the X axis direction and the Y axis direction The orthogonal direction is defined as the Z-axis direction.

  As shown in FIG. 2, the condenser cooling system 11 includes a first bundle of pipes 2A and a second bundle of pipes 2B disposed in the condenser R1 among the two condensers R1 and R2. And a tube bundle 2C on the first side, which is a tube bundle disposed in the condenser R2, and a tube bundle 2D on the second side. Hereinafter, the “first side” is referred to as “upper side” in the vertical direction (Y-axis direction), the “second side” is referred to as “lower side” in the Y-axis direction, and the condenser cooling facility 11 is an upper tube bundle ( The case where the upper one or more tube bundles) and the lower tube bundle (lower one or more tube bundles) are provided will be described. However, it is not limited to that case. For example, as described later with reference to FIGS. 5 to 9, “first side” is the “supply water pipe side” of the cooling water, and “second side” is the “discharge water pipe side” of the cooling water. Also good.

  The tube bundle 2 is constituted by eight tube bundles of right and left and upper and lower. Specifically, the tube bundle 2 is an upper tube bundle (for example, two left and right upper tube bundles in FIG. 2) 2A disposed in a condenser R1 and a lower tube bundle (for example, two left and right in FIG. 2) Tube bundle 2B, upper tube bundle (for example, two upper tube bundles in left and right in FIG. 2) 2C and lower tube bundle (for example, two lower tube bundles in left and right in FIG. 2) 2D disposed in the condenser R2 Prepare.

  As shown in FIG. 2, the water chamber 3 is constituted by a pair of four water chambers, that is, eight water chambers, and is connected to the tube bundle 2. Specifically, as shown in FIG. 3, the condenser Rm assigns one upper water chamber 3A to the upper tube bundle 2A consisting of the upper two tube bundles 2 on the upper side, and the lower two tubes One lower water chamber 3B is allocated to the lower tube bundle 2B consisting of the tube bundle 2 of FIG.

  The condenser cooling system 11 has a configuration in which the large water chamber is separated by the partition plate V to the upper side and the lower side so that the upper water chamber 3A and the lower water chamber 3B are allocated. This enables water to flow separately to the upper tube bundle 2A and the lower tube bundle 2B. The upper and lower divisions are not limited to the configuration in which the large water chamber is partitioned by the partition plate V, and the upper water chamber and the lower water chamber may be separately installed.

  Returning to the explanation of FIG. 2, the connecting pipe 4 is a cooling pipe, and in the case of m = 2, it is constituted by four connecting pipes. Specifically, the connecting pipe 4 connects the upper water chambers of the adjacent condensers R1 and R2, that is, the connecting pipe 4P connecting the upper water chamber 3A and the upper water chamber 3C, the upper water chamber 3A 'and the upper water chamber A connecting pipe 4P 'connecting the water chamber 3C' is provided. Similarly, the connecting pipe 4 is a connecting pipe 4Q connecting the lower water chambers of the adjacent condensers R1 and R2, that is, the lower water chamber 3B and the lower water chamber 3D, and a lower water chamber 3B ' And a connecting pipe 4Q 'connecting the lower water chamber 3D'. In the case of m ≧ 3, the connecting pipe 4 connects the upper water chambers and the lower water chambers of the adjacent condensers among the plurality of condensers.

  The supply main pipe 5 is a cooling pipe for supplying cooling water to the condenser cooling facility 11, that is, a supply water pipe, and only one is provided regardless of the number of m.

  The supply branch pipes 6 are cooling pipes branched from the supply main pipe 5, and four are provided regardless of the number of m. Specifically, the condenser cooling system 11 is provided with four of the supply branch pipes 6A, 6A ', 6B, 6B', and the upper side disposed in the condenser R1, which is the condenser closest to the water supply pipe. The supply main pipe 5 is connected to the water chambers 3A, 3A 'and the lower water chambers 3B, 3B', respectively. Further, valves 9A, 9A ', 9B, 9B' are provided in the supply branch pipes 6A, 6A ', 6B, 6B' respectively.

  The discharge branch pipe 7 is a cooling pipe for discharging the hot water after cooling, and four pipes are provided regardless of the number of m. Specifically, the condenser cooling system 11 is provided with four of the discharge branch pipes 7C, 7C ', 7D, 7D', and the upper side disposed in the condenser R2, which is the condenser closest to the discharge water pipe. The water chambers 3C, 3C 'and the lower water chambers 3D, 3D' are connected to the discharge main pipe 8, respectively. Further, valves 9C, 9C ', 9D, 9D' are provided in the discharge branch pipes 7C, 7C ', 7D, 7D' respectively.

  The discharge main pipe 8 is a cooling pipe that combines and discharges the drainage sent from the discharge branch pipes 7C, 7C ', 7D, 7D', that is, a discharge water pipe, and only one is installed regardless of the number of m.

  Note that the supply branch pipe 6 and the discharge branch pipe 7 connected to the water chamber 3 shown in FIG. 1 are connected to a surface other than the lower surface of the water chamber 3 in order to avoid the embedding of the cooling pipe. More preferably, it is connected to the side surface of the water chamber 3, that is, to the YZ plane. As a result, since the cooling pipes such as the supply branch pipe 6 are connected to the side surface of the water chamber 3, an effect of not inhibiting the drawing operation of the cooling pipe (tube) necessary for maintenance can be obtained. The drawing operation of the cooling pipe means the operation of drawing the cooling pipe constituting the pipe bundle 2 along the Z-axis.

1-2. Operation FIGS. 4A and 4B are perspective views showing the operation of the condenser cooling system 11. 4A and 4B, two right and left tube bundles constituting the upper tube bundle 2A, two right and left tube bundles constituting the lower tube bundle 2B, and two left and right tubes constituting the upper tube bundle 2C. The tube bundle and the two left and right tube bundles constituting the lower tube bundle 2D are conveniently expressed as being one each.

  FIG. 4 (A) schematically shows the flow of water during normal operation in the condenser cooling system 11.

  As shown in FIG. 4 (A), during normal operation of the condenser cooling system 11, the valve is formed so that the flow in the opposite direction is formed by the upper pipe bundle 2A and the lower pipe bundle 2B disposed in the condenser R1. The opening and closing of 9 is set. For example, of the valves 9, the valves 9A, 9D, 9B ', 9C' are closed, while the valves 9B, 9C, 9A ', 9D' are opened. By opening and closing the valve 9, the water for cooling is branched from the supply main pipe 5 and supplied to the supply branch pipes 6B and 6A '. The water supplied to the supply branch pipe 6B passes through the valve 9B, branches, and is supplied to the lower pipe bundle 2D via the lower pipe bundle 2B and the connecting pipe 4Q. That is, water flows in the same direction (Z-axis direction) to the lower tube bundles 2B and 2D.

  Subsequently, the water flowing through the lower pipe bundle 2B passes through the connecting pipe 4Q ′, joins with the water flowing through the lower pipe bundle 2D, passes through the valve 9D ′, and is discharged to the discharge main pipe 8.

  On the other hand, the water supplied to the supply branch pipe 6A 'passes through the valve 9A', branches and is supplied to the upper pipe bundle 2A and the upper pipe bundle 2C. That is, water flows in the same direction (opposite to the Z-axis direction) to the upper tube bundles 2A and 2C.

  Subsequently, the water flowing through the upper tube bundles 2A and 2C merges, passes through the valve 9C, and is discharged to the discharge main pipe 8.

  FIG. 4B schematically shows the flow of water when only the upper tube bundle is backwashed in the condenser cooling system 11.

  When the valves 9A and 9C 'in the closed state shown in FIG. 4 (A) are opened while the valves 9C and 9A' in the open state are closed, the backwash operation of the upper tube bundle 2A, 2C shown in FIG. 4 (B). It becomes. Here, the opening and closing of the valve may be manually performed by the operation of the valve by the operator, or may be automatically performed by the control unit (not shown) according to the input by the operator.

  By such opening / closing operation of the valve 9, water for cooling is branched from the supply main pipe 5, flows to the supply branch pipe 6A, passes through the valve 9A, branches and is supplied to the upper pipe bundle 2A and the upper pipe bundle 2C. .

  Subsequently, the water flowing through the upper tube bundle 2A passes through the joint tube 4P ', joins with the water flowing through the upper tube bundle 2C, passes through the valve 9C', and is discharged to the discharge main pipe 8.

  On the other hand, the water supplied to the supply branch pipe 6B passes through the valve 9B and branches to be supplied to the lower pipe bundle 2B and the lower pipe bundle 2D as in the normal operation.

  As described with reference to FIG. 4B, when only the upper tube bundles 2A and 2C are backwashed, the upper tube bundles 2A and 2C and the lower tube bundles 2B and 2D are in the same direction (Z-axis direction) Water will flow. That is, it is possible to reverse the direction of the water flow in the upper tube bundles 2A, 2C while maintaining the water flow in the lower tube bundles 2B, 2D. In the case where the lower tube bundles 2B and 2D are backwashed, control can be similarly performed by opening and closing the valve 9. Specifically, when the closed valves 9D and 9B 'shown in FIG. 4A are opened while the open valves 9B and 9D' are closed, the lower tube bundle 2B or 2D is backwashed and Become.

1-3. Effects According to the condenser cooling system 11, if only one supply main pipe 5 for cooling water and one discharge main pipe 8 are installed at both ends of the adjacent condensers R1 and R2, the cooling function is satisfied can do. Further, according to the condenser cooling system 11, since the number of main pipes is small, cooling pipes such as the supply main pipe 5, the supply branch pipe 6, the discharge branch pipe 7, and the discharge main pipe 8 are laid on the floor of the turbine building. It is possible to do enough. As a result, due to the building layout of the turbine building, the amount of cooling piping buried underground and reduced can be reduced, and the construction cost can be reduced. For example, in the case of a plant having three condensers, it is possible to reduce the number of main pipes from six to two, but there is no need to bury the cooling pipes underground in the turbine building, so Installation of the water tank can be performed simultaneously, and the construction period can be shortened.

  In the condenser cooling system 11, the pair of the upper tube bundle 2A, 2C and the pair of the lower tube bundle 2B, 2D can be independently backwashed. Therefore, since it is possible to realize the backwashing of the other of the upper tube bundles 2A and 2C and the lower tube bundle 2B and 2D while maintaining the cooling function of one of them, the backwashing operation of the conventional condenser cooling facility Similarly, it is possible to switch to the backwash operation without causing a temporary stop of all the coolant flow.

2. Second Embodiment 2-1. Configuration The condenser cooling system according to the second embodiment is applied to a conventional condenser cooling system 112 having the longitudinal tube bundle arrangement shown in FIG. 11 (B). In the vertically long tube bundle arrangement, it is difficult to divide the water chamber up and down in structure, so the water chamber on the water supply pipe side and the water chamber on the discharge water pipe side are configured similarly to the conventional condenser cooling equipment 112 Be done. The condenser cooling system according to the second embodiment is characterized by the water chamber on the water supply pipe side in the X-axis direction so that the cooling pipe connected to the side surface of the water chamber can be constituted by a straight pipe (linear pipe). By arranging the water chambers on the side of the discharge water pipe alternately in the Y-axis direction, the installation area (space) of the cooling piping is secured.

  FIG. 5 is a perspective view showing a configuration of a condenser cooling system of a power plant according to a second embodiment. FIGS. 6A and 6B are X-Y side views showing the configuration of a condenser cooling system according to a second embodiment. FIG.6 (C), (D) is a YZ side view which shows the structure of the condenser cooling installation which concerns on 2nd Embodiment.

  FIG. 5 shows a condenser cooling system 12 according to a second embodiment corresponding to m, for example, two condensers R1 and R2. Condenser cooling system 12 includes a water chamber 31 provided at both ends of the longitudinally long tube bundle in condensers R1 and R2, a connecting pipe 41 connecting water chambers 31 with each other, and a supply main pipe 5 for supplying cooling water. A supply branch pipe 61 connecting the supply main pipe 5 and the water chamber 31, a discharge branch pipe 71 connecting the water chamber 31 and the discharge main pipe 8, a discharge main pipe 8 discharging the hot water after cooling, a supply branch A valve 9 provided in the pipe 61 and the discharge branch pipe 71 is provided. Hereinafter, the case of m = 2 will be described except for the case where particular mention is made, but it is not limited to that case.

  As shown in FIG. 6, the tube bundle 21 is constituted by four longitudinal tube bundles. Specifically, the tube bundle 21 includes a tube bundle 21A and a tube bundle 21B disposed in the condenser R1, and a tube bundle 21C and a tube bundle 21D disposed in the condenser R2.

  As shown in FIG. 6, the water chamber 31 is constituted by a pair of four water chambers, that is, eight water chambers, and is connected to the tube bundle 21. Specifically, the water chamber 31 includes water chambers 31A and 31A 'connected to both ends of the pipe bundle 21A in the condenser R1, water chambers 31B and 31B' similarly connected to the pipe bundle 21B, and condensate The water chambers 31C and 31C 'connected to the tube bundle 21C in the vessel R2 and the water chambers 31D and 31D' similarly connected to the tube bundle 21D.

  In FIG. 6, the connecting pipe 41 is a cooling pipe, and in the case of m = 2, it is constituted by four connecting pipes. Specifically, the connecting pipe 4 is one side water chambers of adjacent condensers R1 and R2, that is, a connecting pipe 41P connecting the water chamber 31A and the water chamber 31C, and a water chamber on the opposite side of the condenser. A connection pipe 41P 'is provided which connects the water chamber 31A' and the water chamber 31C '. In addition, the connecting pipe 4 is a water pipe 31Q connecting the water chambers 31B and 31D with water chambers on the other side of adjacent condensers R1 and R2, that is, a water chamber 31B on the other side of the condenser. A connecting pipe 41Q 'connecting the water chamber 31D' and the water chamber 31D 'is provided. In the case of m ≧ 3, the connecting pipe 41 connects the water chambers on the same side on the left and right sides of the adjacent condensers among the plurality of condensers.

  In addition, the connecting pipe 41 is disposed using an empty space formed by the water chambers 31 disposed alternately in the vertical direction (shown in FIG. 5).

  The supply branch pipes 61 are cooling pipes branched from the supply main pipe 5, and four are provided regardless of the number of m. Specifically, the condenser cooling system 12 is provided with four of the supply branch pipes 61A, 61A ', 61B, 61B', and the water disposed in the condenser R1, which is the condenser closest to the water supply pipe. The supply main pipe 5 is connected to the chambers 31A, 31A ', 31B and 31B', respectively. Further, valves 9A, 9A ', 9B, 9B' are provided in the supply branch pipes 61A, 61A ', 61B, 61B' respectively.

  The discharge branch pipe 71 is a cooling pipe for discharging the hot water after cooling, and four pipes are provided regardless of the number of m. Specifically, the condenser cooling system 12 is provided with four of the discharge branch pipes 71C, 71C ', 71D, 71D', and the water disposed in the condenser R2, which is the condenser closest to the discharge water pipe. The chambers 31C, 31C ', 31D, 31D' are connected to the discharge main pipe 8, respectively. Further, valves 9A, 9A ', 9B, 9B' are provided in the discharge branch pipes 71C, 71C ', 71D, 71D', respectively.

  Here, the connection pipe 41, the supply branch pipe 61, and the discharge branch pipe 71 connected to the water chamber 31 shown in FIG. 5 are connected to a surface other than the lower surface of the water chamber 31 in order to avoid the embedding of the cooling piping. . More preferably, the water chamber 31 is connected to the side surface, that is, the Y-Z surface. As a result, the cooling piping such as the supply branch pipe 61 is connected to the side surface of the water chamber 31, so that an effect of not inhibiting the drawing operation of the cooling pipe, which is necessary for maintenance, can be obtained.

  In FIG. 5 and FIG. 6, the same members as those in FIG. 1 and FIG.

2-2. Operation FIGS. 7A and 7B are perspective views showing the operation of the condenser cooling system 12.

  FIG. 7 (A) schematically shows the flow of water during normal operation in the condenser cooling system 12.

  As shown in FIG. 7A, during normal operation of the condenser cooling system 12, the valve 9 is opened and closed so as to form a flow in the opposite direction between the pipe bundle 21A and the pipe bundle 21B disposed in the condenser R1. Is set. For example, of the valves 9, the valves 9A, 9D, 9B ', 9C' are closed, while the valves 9B, 9C, 9A ', 9D' are opened. By opening and closing the valve 9, the water for cooling is branched from the supply main pipe 5 and supplied to the supply branch pipes 61B and 61A '. The water supplied to the supply branch pipe 61B passes through the valve 9B, branches at the water chamber 31B, and is supplied to the pipe bundle 21D via the pipe bundle 21B and the connecting pipe 41Q. That is, water flows in the same direction (Z-axis direction) in the tube bundles 21B and 21D.

  Subsequently, the water flowing through the tube bundle 21B passes through the connecting tube 41Q ′, joins with the water flowing through the tube bundle 21D in the water chamber 31D ′, passes through the valve 9D ′, and is discharged to the discharge main pipe 8.

  On the other hand, the water supplied to the supply branch pipe 61A 'passes through the valve 9A', branches at the water chamber 31A ', and is supplied to the pipe bundle 21A and the connecting pipe 41P'. The pipe bundle 21C is supplied via the connecting pipe 41P '. That is, water flows in the same direction (in the direction opposite to the Z-axis direction) to the tube bundles 21A and 21C.

  Subsequently, the water flowing through the pipe bundle 21A passes through the connecting pipe 41P, joins with the water flowing through the pipe bundle 21C in the water chamber 31C, passes through the valve 9C, and is discharged to the discharge main pipe 8.

  FIG. 7 (B) schematically shows the flow of water when only one tube bundle at the condenser cooling system 12 is backwashed.

  When the closed valves 9A and 9C 'shown in FIG. 7A are opened and the opened valves 9C and 9A' are closed, the backwashing operation of the tube bundles 21A and 21C shown in FIG. 7B and Become. Here, the opening and closing of the valve may be manually performed by the operation of the valve by the operator, or may be automatically performed by the control unit (not shown) according to the input by the operator.

  By the opening and closing operation of the valve 9 as described above, the water for cooling is branched from the supply main pipe 5 and supplied to the supply branch pipes 61A and 61B. The water supplied to the supply branch pipe 61A passes through the valve 9A, branches at the water chamber 31A, and is supplied to the pipe bundle 21C via the pipe bundle 21A and the connecting pipe 41P.

  Subsequently, the water flowing through the tube bundle 21A passes through the connecting tube 41P ', joins with the water flowing through the tube bundle 21C in the water chamber 31C', passes through the valve 9C ', and is discharged to the discharge main pipe 8.

  On the other hand, the water supplied to the supply branch pipe 61B passes through the valve 9B and is supplied to the pipe bundle 21B and the pipe bundle 21D as in the normal operation.

  As described with reference to FIG. 7B, when backwashing only the tube bundles 21A and 21C, water flows in the same direction (Z-axis direction) in the tube bundles 21A and 21C and the tube bundles 21B and 21D. become. That is, it is possible to reverse the direction of the water flow in the tube bundles 21A and 21C while maintaining the water flow in the tube bundles 21B and 21D. In the case of backwashing the tube bundles 21B and 21D, control can be similarly performed by opening and closing the valve 9. Specifically, when the closed valves 9D and 9B 'shown in FIG. 7A are opened, and the opened valves 9B and 9D' are closed, the tube bundles 21B and 21D are backwashed.

2-3. Effects According to the condenser cooling system 12, if only one supply main pipe 5 for cooling water and one discharge main pipe 8 are installed at both ends of the adjacent condensers R1 and R2, the cooling function is satisfied can do. Further, according to the condenser cooling system 12, since the number of main pipes is small, cooling pipes such as the supply main pipe 5, the supply branch pipe 61, the discharge branch pipe 71, and the discharge main pipe 8 are laid on the floor of the turbine building. It is possible to do enough. As a result, due to the building layout of the turbine building, the amount of cooling piping buried underground and reduced can be reduced, and the construction cost can be reduced. For example, in the case of a plant having three condensers, it is possible to reduce the number of main pipes from six to two, but there is no need to bury the cooling pipes underground in the turbine building, so Installation of the water tank can be performed simultaneously, and the construction period can be shortened.

  In the condenser cooling system 12, the tube bundles 21A and 21C and the tube bundles 21B and 21D can be independently backwashed. Therefore, since the other backwashing can be realized while maintaining the cooling function of one of the pair of pipe bundles 21A and 21C and the pair of pipe bundles 21B and 21D, the backwash operation of the conventional condenser cooling system As with time, it is possible to switch to the backwash operation without causing a temporary stop of all cooling water flow.

3. Third embodiment 3-1. Configuration A condenser cooling system according to the third embodiment is the same as the condenser cooling system according to the second embodiment in the conventional condenser cooling system 112 having the vertically long tube bundle arrangement shown in FIG. Apply to The condenser cooling installation which concerns on 3rd Embodiment connects the water chamber side surfaces of the same side in an X-axis direction with cooling piping similarly to the condenser cooling installation which concerns on 2nd Embodiment. A characteristic of the condenser cooling system according to the third embodiment is that a water chamber having a recessed shape is installed so that the cooling pipe connected to the side surface of the water chamber can be constituted by a straight pipe. Was secured.

  FIG. 8 is a perspective view showing a configuration of a condenser cooling system of a power generation plant according to a third embodiment.

  FIG. 8 shows a condenser cooling system 13 according to a third embodiment corresponding to m, for example, two condensers R1 and R2. Condenser cooling system 13 includes a water chamber 31 provided at both ends of the longitudinally long tube bundle in condensers R1 and R2, a connecting pipe 41 connecting water chambers 31 with each other, and a supply main pipe 5 for supplying cooling water. A supply branch pipe 61 connecting the supply main pipe 5 and the water chamber 31, a discharge branch pipe 71 connecting the water chamber 31 and the discharge main pipe 8, a discharge main pipe 8 discharging the hot water after cooling, a supply branch A valve 9 provided in the pipe 61 and the discharge branch pipe 71 is provided. Hereinafter, the case of m = 2 will be described except for the case where particular mention is made, but it is not limited to that case.

  The configuration of the condenser cooling system 13 different from the condenser cooling system 12 shown in FIGS. 5 and 6 is the shape of a water chamber. The water chamber 31 of the condenser cooling system 13 has a concave shape to secure the installation area of the cooling pipe.

  FIG. 9A is an X-Y side view showing a configuration example of the tube bundle 21, the water chamber 31, and the cooling piping provided in the condenser cooling facility 13. FIG. 9B is a Y-Z side view showing a configuration example of the pipe bundle 21, the water chamber 31, and the cooling pipe provided in the condenser cooling facility 13.

  Condenser cooling installation 13 equips the right and left of condenser Rm with two tube bundles 21, as shown in Drawing 9 (A). Then, in the condenser cooling facility 13, the water chambers 31A and 31A 'are allocated to the end of the tube bundle 21A on one side, and the water chambers 31B and 31B' are allocated to the end of the tube bundle 21B on the other side.

  Further, as shown in FIG. 8 and FIGS. 9A and 9B, in the condenser cooling facility 13, in order to secure the installation area of the cooling piping connected to the side surfaces of the water chambers 31A and 31B, The water chambers 31A, 31B have a recessed shape. For example, the water chamber 31A has a shape with a recess on the lower side to secure the installation area of the supply branch pipe 61B connected to the water chamber 31B, while the water chamber 31B is a connecting pipe connected to the water chamber 31A. In order to secure the installation area of 41 P, the upper side has a concave shape.

3-2. Operation The operation of the condenser cooling system 13 is the same as the operation of the condenser cooling system 12 described with reference to FIG.

3-3. Effects The condenser cooling system 13 has the same effects as the condenser cooling system 12. In the condenser cooling system 12, each water chamber extends upward or downward with respect to the tube bundle. On the other hand, in the condenser cooling system 13, the height of the water chamber does not change as compared with the conventional condenser cooling system, so application is possible even when there is no margin in the vertical installation area of the condenser. It is possible.

4. Conventional Condenser Cooling Equipment FIG. 10 is a perspective view showing a configuration of cooling water piping in a conventional condenser cooling equipment. FIGS. 11A and 11B are X-Y side views showing a configuration example of a tube bundle arrangement in a conventional condenser. Fig. 11 (A) shows a condenser cooling system 111 of upper and lower two-divided tube bundles, and Fig. 11 (B) shows a condenser cooling system 112 of a vertically long tube bundle arrangement.

  FIG. 10 shows a conventional condenser cooling system 111 (the same applies to the condenser cooling system 112) corresponding to the condenser Sm. Condenser cooling equipment 111 includes a tube bundle 102 (shown in FIGS. 11A and 11B), a water chamber 103, a water chamber connecting pipe 104, a supply piping 105, a discharge piping 108, a valve 109, and a water chamber communication valve. 110 is provided.

  In the condenser cooling system 111 shown in FIG. 10, the backwashing operation for each water chamber can be performed by the combination of the opening and closing of the valves 109 and 110. However, when it is necessary to install four large-diameter cooling water pipes (supply pipe 105 and discharge pipe 108) per condenser, and a plurality of condensers 111 are adjacent to each other, due to restrictions on the arrangement, Large diameter piping excavates the lowermost part of the turbine building, and will adopt the layout buried under the installation floor G of the condenser.

  While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  11, 12, 13, ... condenser cooling equipment, 2, 21 ... tube bundle, 3, 31 ... water chamber, 4, 41 ... connection pipe, 5 ... supply main pipe, 6, 61 ... supply branch pipe, 7, 71 ... Discharge branch pipe, 8 ... discharge mother pipe, 9 ... valve.

Claims (8)

A condenser cooling system of a power plant, comprising a tube bundle disposed in a condenser and water chambers connected to both ends of the tube bundle,
A first side tube bundle and a second side tube bundle disposed in each of the plurality of condensers,
A first side water chamber and a second side water chamber connected to the first side tube bundle and the second side tube bundle respectively;
A connecting pipe for connecting the water chambers on the first side and the water chambers on the second side of the adjacent condensers among the plurality of condensers;
A supply main pipe for supplying water for cooling;
A supply branch connecting the side surface of the first side water chamber and the second side water chamber disposed in the condenser closest to the supply water pipe among the plurality of condensers and the supply main pipe With the tube,
A discharge main pipe for discharging the water;
A discharge branch that connects the side surface of the first water chamber and the second water chamber disposed in the condenser closest to the discharge water pipe among the plurality of condensers to the discharge main pipe With the tube,
Condenser cooling equipment of a power plant characterized by having. The supply branch pipe and the discharge branch pipe are each provided with a valve,
The condenser cooling installation of the power plant according to claim 1. The opening and closing of the valve is controlled such that water flows in the opposite direction between the first side tube bundle and the second side tube bundle, or the first side tube bundle and the second side A control unit is further provided to control opening and closing of the valve so that water flows in the same direction with the tube bundle.
The condenser cooling installation of a power plant according to claim 2. The first side tube bundle is an upper tube bundle in the vertical direction,
The second side tube bundle is a lower tube bundle in the vertical direction,
The first water chamber is an upper water chamber connected to both ends of the upper tube bundle,
The second water chamber is a lower water chamber connected to both ends of the lower tube bundle,
The condenser cooling installation according to any one of claims 1 to 3. The first side pipe bundle is a pipe bundle on the supply water pipe side,
The second side pipe bundle is a water pipe side pipe bundle,
The water chamber on the first side is a water chamber on the side of the supply water pipe connected to both ends of the tube bundle on the side of the supply water pipe,
The water chamber on the second side is a water chamber on the side of the discharge water pipe connected to both ends of the tube bundle on the side of the discharge water pipe,
The condenser cooling installation according to any one of claims 1 to 3. The water chambers on the side of the supply water pipe and the water chambers on the side of the discharge water pipe are alternately arranged in the vertical direction so that the connection pipe can be configured as a straight pipe.
The condenser cooling installation of the power plant according to claim 5. The water chamber on the side of the supply water pipe and the water chamber on the side of the discharge water pipe have a recessed shape so as to secure the installation area of the connection pipe so that the connection pipe can be constituted by a straight pipe.
The condenser cooling installation of the power plant according to claim 5. A backwash operation method in a condenser cooling system comprising a first side pipe bundle and a second side pipe bundle disposed in each condenser of the plurality of condensers, wherein
Water flows opposite to each other between the first side tube bundle and the second side tube bundle, or the same direction is applied to the first side tube bundle and the second side tube bundle Control the flow direction of the water so as to
A backwash operation method characterized by

Images