JP2008256279A - Condensing facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condensing facility capable of making the length of a circulation water pipe of condensers short and equivalent, and thereby, capable of preventing complication of a drain recovery pipe, and capable of securing a space without excessively enlarging the condenser by securing a drain recovery pipe connecting space to the condenser. <P>SOLUTION: A plurality of condensers 1, 2 and 3 having different length of a condenser barrel are arranged in parallel, the condensers are connected in series by the circulation water pipe, barrel longitudinal center positions of the condensers are different in the longitudinal direction, and the lengths of inlet side circulation water pipes and outlet side circulation water pipes of the adjacent condensers are coincident with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a condensing facility that condenses exhaust steam after driving a steam turbine in a nuclear power plant or the like, and more particularly to a condensing facility that applies a plurality of condensers in series.

  For example, in a nuclear power plant, steam generated in a nuclear reactor is supplied to a steam turbine, and the generator is driven to generate electricity. A circulation system for supplying to the furnace is adopted. Normally, in a large-capacity nuclear power plant with a power generation output of 1000 MW, a steam turbine that rotates a generator is a high-pressure turbine that is driven by steam generated in a nuclear reactor, and steam that has been worked in the high-pressure turbine. Consists of a driving low-pressure turbine. Two or three low-pressure turbines are installed, and steam discharged from the work of these low-pressure turbines is led to a condensing facility equipped with a plurality of condensers. It becomes.

  The condensate facility of the nuclear power plant will be specifically described with reference to FIG. As shown in FIG. 4, the steam S <b> 1 generated in the nuclear reactor 100 is sent to the high-pressure turbine 102 through the steam pipe 101, and then becomes low-pressure steam S <b> 2 through the turbine pipe 103, for example, a plurality of low-pressure turbines 3. It is sent to the low-pressure turbines 10, 11, and 12, and the generator 104 is driven for work. The exhaust steam (S3) discharged from these low-pressure turbines 10, 11, and 12 is supplied to, for example, three-body condensers 1, 2, and 3 having three condenser bodies.

  Cooling pipes 4, 5, 6 are installed in the trunks 1 a, 2 a, 3 a of the condensers 1, 2, 3, respectively, and the cooling water supply pipe 104 is provided in these cooling pipes 4, 5, 6. Are supplied with cooling waters w1, w2, and w3, respectively. The steam S3 discharged from the work by the three low-pressure turbines 1, 2, 3 and led to the condensers 1, 2, 3 is cooled by the cooling pipes 4, 5 provided in the cylinders 1a, 2a, 3a. , 6 passes through the outside of the cooling pipes 4, 5, 6 at that time and exchanges heat with the cooling waters w 1, w 2, w 3, respectively, and condenses into condensates 19, 20, 21. It collects in the hot wells 16, 17, and 18 provided in the lower parts of the water vessels 1, 2, and 3.

  Condensate 19, 20, and 21 accumulated in the hot wells 16, 17, and 18 are discharged to the circulation pipe 105 by the condensate pump 22 installed in the vicinity of the condensers 1, 2, and 3, and further, by the feed pump 23. The pressure is increased and guided to the nuclear reactor 24.

  The condensate pump 22 may be referred to as a low-pressure condensate pump. In this case, a pump referred to as a high-pressure condensate pump may be further provided on the downstream side.

  By the way, as shown in FIG. 4, about the cooling water w1, w2, w3 which flows through the inside of the cooling pipes 4, 5, and 6 mentioned above, when introducing in parallel to several condenser 1, 2, 3 As shown in FIG. 5, the cooling waters w1, w2, and w3 may be introduced in series using a series piping configuration.

  As shown in FIG. 4, when the cooling waters w1, w2, and w3 are introduced in parallel, the cooling water having the same temperature and the same flow rate is introduced into the plurality of condensers 1, 2, and 3, respectively. Therefore, the heat exchange with the steam s3 exhausted by work in the low-pressure turbines 10, 11, 12 and led to the condensers 1, 2, 3 is performed under the same conditions in the plurality of condensers 1, 2, 3. It is done at.

  On the other hand, as shown in FIG. 5, when the cooling water w is introduced in series, the cooling water w is sequentially introduced into the condensers 1, 2, 3. In the condenser 1 into which the cooling water is introduced, the temperature of the cooling water is low, and in the condensers 2 and 3 into which the cooling water w is introduced later, the temperature of the cooling water w is high. Therefore, the heat exchange with the steam S3 discharged from the low-pressure turbines 10, 11 and 12 and led to the condensers 1, 2 and 3 has different conditions in the condensers 1, 2 and 3, respectively. It is done at.

  Since the steam S3 is saturated outside the cooling pipes 4, 5, and 6 when it is condensed into condensate, the temperatures of the cooling waters w1, w2, and w3 in the condensers 1, 2, and 3 are If they are different, the pressure outside the cooling tubes 4, 5, 6 will also be different. Such condensers having different internal pressures in a plurality of barrels are generally called “multiple pressure condensers”. In the case of a multi-pressure condenser, the internal pressures of the condensers 1, 2 and 3 are different, so the size of the condensers 1, 2 and 3 is changed in consideration of the balance of the exchange heat. Sometimes.

  FIG. 6 shows the configuration of the trunks 1a, 2a, 3a of the condensers 1, 2, 3 shown in FIG. 5 as a plan view. As shown in FIG. 6, in the case of a three-body double pressure condenser, the size is gradually increased along the steam supply direction, and the size is set as condenser 1 <condenser 2 <condenser 3 There are things to do.

  However, even if the sizes of the condensers 1, 2, and 3 are changed in this way, the sizes of the plurality of low-pressure turbines 10, 11, and 12 are generally the same. Since the turbines 10, 11, and 12 have the same rotation shaft, the plurality of condensers 1, 2, and 3 disposed below the turbines are also disposed on the same center line O as shown in FIG. It is common. In FIG. 6, reference numerals 27, 28, 29, 30, 31, 32, 33, and 34 denote circulating water pipes that guide the cooling water to the condensers 1, 2, and 3.

  In the configuration shown in FIG. 6, the cooling water w is first guided to the condenser 1 by the circulating water pipe 27 on the upstream side, and the cooling water w flowing inside the cooling pipe 4 is steam that passes outside the cooling pipe 4. After the temperature is raised by heat exchange, the water is discharged from the condenser 1, passes through the circulating water pipes 28, 29, and 30, and is led to the condenser 2 in the next stage. The cooling water w guided to the condenser 2 flows inside the cooling pipe 5, raises the temperature by heat exchange with steam passing outside the cooling pipe 5, and then is discharged from the condenser 2 and circulated. The water pipes 31, 32, 33 are led to the condenser 3. The cooling water w guided to the condenser 3 flows inside the cooling pipe 6, raises the temperature by heat exchange with steam passing outside the cooling pipe 6, and then is discharged from the condenser 3 and circulated. It is discharged through the water pipe 34.

  Further, as described above, the steam discharged from the work by the low-pressure turbine and led to the condenser passes through the outside of the cooling pipes 4, 5, 6 and passes through the inside of the cooling pipes 4, 5, 6. By exchanging heat with the flowing cooling water w, the steam condenses into condensate and accumulates in a hot well at the lower part of the condenser. In the case of a double pressure condenser, the condensate accumulated in the hot well at the lower part of the condenser is sequentially transferred from the condenser 1 to the condenser 2 and the condenser 3 in order from the hot well of the low pressure side condenser. It is sent to the hot well of the high pressure side condenser, and finally discharged by the condensate pump 22 installed in the vicinity of the condenser 3.

  Further, in a power plant, there are various heat exchangers such as a feed water heater and a moisture separation heater, and the drain discharged from them is generally collected in a condenser. When the condenser is a three-cylinder type, the condenser 2 arranged in the center has little space for connecting a pipe for collecting drain, and is shown by drain pipes 35, 36, 37, and 38 in FIG. As described above, it is general that the drain recovery pipe is connected mainly to the condenser 1 and the condenser 3 and not connected to the condenser 2.

In addition, in Patent Document 1 as a publicly known document, the degree of vacuum is different in a multi-cylinder condenser, and the average degree of vacuum is described as being equal to or greater than that of a single degree of vacuum, There is no particular mention about the arrangement method of the multiple cylinders of different sizes.
JP-A-8-21205 “Condenser Device”

  In the planar arrangement of a conventional general multi-pressure condenser, as shown in FIG. 6, when a plurality of condensers 1, 2, and 3 are arranged on the same center line O, Since the length of the trunk gradually increases with the condensers 1, 2, and 3, the positions of the cooling water outlet portions and the cooling water inlet portions are shifted. That is, in FIG. 6, when comparing the length l1 of the outlet circulating water pipe 28 of the condenser 1 and the length l2 of the inlet circulating water pipe 30 of the condenser 2, the length of l1 is the shortest length. However, there is a problem that the circulating water pipe 28 becomes long. Similarly, since the piping positions of the outlet circulating water pipe 31 of the condenser 2 and the inlet circulating pipe 33 of the condenser 3 are shifted, the condenser 2 is provided even when the circulating water pipe 33 is set to the shortest length. When the length l3 of the outlet circulating water pipe 31 is compared with the length l4 of the inlet circulating water pipe 33 of the condenser 3, the circulating water pipe 31 becomes long even if l3 is the shortest length. . That is, there is a problem that the pipe loss increases as the circulating water pipe 28 and the circulating water pipe 31 become longer.

  Moreover, when each condenser 1,2,3 is arrange | positioned on the same center line, the position of the cooling water inlet / outlet part of each condenser 1,2,3 has shifted | deviated from the condenser centerline little by little. Therefore, the condensate pump 22 needs to be arranged sufficiently separated (below in the drawing in FIG. 6) so as not to interfere with the circulating water pipes 27 to 34 that enter and exit the condensers 1, 2, and 3.

  Furthermore, with regard to drain recovery piping from various heat exchangers such as feed water heaters and moisture separation heaters to the condenser, the condenser 2 arranged in the center has almost no space for connecting the drain recovery piping. Therefore, the drain recovery piping connection to the condensers 1 and 3 is increased, so that the drain recovery piping is complicated, or the drain recovery piping connection space to the condensers 1 and 3 is insufficient. There was a problem that it had to be made larger.

  The present invention has been made in view of such circumstances, and the length of the circulation piping of each condenser can be shortened and equalized, thereby preventing the drain recovery piping from being complicated, It is an object of the present invention to provide a condensing facility that can secure a drain recovery piping connection space to the condenser without enlarging the condenser and securing the space.

  In order to achieve the above object, in the condensing facility according to the present invention, a plurality of condensers having different condenser body lengths are arranged in parallel, and these condensers are connected in series by circulating water piping. The condensers in the trunk length direction of the condensers differ in the length direction, and the inlet side circulating water piping and the outlet side circulation of the condensers adjacent to each other The length is the same as that of the pipe.

  According to the present invention, the length of the circulation piping of each condenser can be shortened and equalized, thereby preventing the drain recovery piping from being complicated, and the drain recovery piping connection space to the condenser. It is possible to secure space and the like without increasing the condenser and making the condenser larger.

  Hereinafter, an embodiment of a condensate facility according to the present invention will be described with reference to the drawings.

[First Embodiment (FIG. 1)]
FIG. 1 is a plan view showing a condensing facility according to a first embodiment of the present invention. As shown in FIG. 1, in this embodiment, circulating water pipes 27 to 34 that guide the cooling water w to three condensers 1, 2, and 3 are provided. That is, cooling pipes 4, 5, and 6 are installed in the trunks 1a, 2a, and 3a of the condensers 1, 2, and 3, respectively, and cooling water is supplied into these cooling pipes 4, 5, and 6, respectively. Cooling water w is supplied from the piping. The steam guided to the condensers 1, 2, 3 passes outside the cooling pipes 4, 5, 6 provided in the trunks 1 a, 2 a, 3 a, and at that time, the cooling pipes 4, 5, 6 Heat is exchanged with the cooling water w flowing inside to condense, and condensate to accumulate in hot wells 16, 17, 18 provided below the condensers 1, 2, 3. .

  Condensate accumulated in the hot wells 16, 17, and 18 is discharged to a circulation pipe by a condensate pump (not shown) installed in the vicinity of the condensers 1, 2, and 3, and is boosted and guided to the nuclear reactor. About the cooling water w which flows through the inside of the cooling pipes 4, 5, and 6, it has the structure which introduce | transduces the cooling water w into a plurality of condensers 1, 2, and 3 in series using a serial piping structure.

  In FIG. 1, the structure of trunk | drum 1a, 2a, 3a of the condenser 1,2,3 is shown as a top view. As shown in FIG. 1, in the case of a three-body double pressure condenser, the size is gradually increased along the steam supply direction, and the size is set as condenser 1 <condenser 2 <condenser 3 is doing. And centerline O1, O2, O3 of each condenser 1,2,3 has the structure shifted in the axial direction of the trunk | drum. That is, a plurality of condensers having different trunk lengths are arranged in parallel, and these condensers 1, 2, 3 are connected in series by circulating water pipes 27, 28, 29, 30, 31, 32, 33, 34. Condensation equipment connected to And the trunk | drum length direction center position of each condenser 1,2,3 is varied in the said length direction, the inlet-side circulating water piping and outlet of each condenser 1,2,3 adjacent to each other The length is the same as that of the side circulation pipe.

  As a result, the cooling water w is first guided to the condenser 1 by the circulating water pipe 27 on the upstream side, and the cooling water w flowing inside the cooling pipe 4 is heated by heat exchange with the steam passing outside the cooling pipe 4. Is then discharged from the condenser 1, passes through the circulating water pipes 28, 29, and 30, and is led to the condenser 2 in the next stage. The cooling water w guided to the condenser 2 flows inside the cooling pipe 5, raises the temperature by heat exchange with steam passing outside the cooling pipe 5, and then is discharged from the condenser 2 and circulated. The water pipes 31, 32, 33 are led to the condenser 3. The cooling water w guided to the condenser 3 flows inside the cooling pipe 6, raises the temperature by heat exchange with steam passing outside the cooling pipe 6, and then is discharged from the condenser 3 and circulated. It is discharged through the water pipe 34.

  The steam guided to the condensers 1, 2, 3 exchanges heat with the cooling water w flowing inside the cooling pipes 4, 5, 6 when passing outside the cooling pipes 4, 5, 6. As a result, the steam condenses into condensate and accumulates in the hot well at the bottom of the condenser. Condensate accumulated in the hot well at the lower part of the condenser is sequentially transferred from the condenser 1 to the condenser 2 and the condenser 3 in order from the hot well of the low pressure side condenser to the hot well of the high pressure side condenser. And is finally discharged by a condensate pump 22 installed in the vicinity of the condenser 3.

  Thus, in this embodiment, each condenser 1, 2, 3 is not arrange | positioned on the same center line, but the cooling water outlet part of the condenser 1 and the cooling water inlet part of the condenser 2 are provided. Arranged to align the positions. Further, the cooling water outlet portion of the condenser 2 and the cooling water inlet portion of the condenser 3 are arranged so as to be aligned. That is, l1 and l2, l3 and l4, and l5 and l6 are made to coincide with each other.

  Thereby, when the circulation water piping 30 of the condenser 2 is made the shortest length, the circulation water piping 28 of the condenser 1 can be similarly made the shortest length. Similarly, when the circulating water pipe 33 has the shortest length, the circulating water pipe 31 can also have the shortest length.

  According to the present embodiment, the piping loss can be reduced as much as the circulating water piping 28 and the circulating water piping 31 are shortened.

[Second Embodiment (FIG. 2)]
A second embodiment of the present invention will be described with reference to FIG.

  FIG. 2 is a plan view showing a configuration example of a condenser according to claim 2 of the present invention, and the components will be described below.

  In FIG. 2, reference numerals 27 to 34 denote circulating water pipes that guide the cooling water to the condensers 1, 2, and 3. That is, the cooling water is first guided to the condenser 1 by the circulating water pipe 27, and the cooling water 7 flowing inside the cooling pipe 4 is raised in temperature by heat exchange with steam passing outside the cooling pipe 4. The water is discharged from the condenser 1 and is led to the condenser 2 through the circulating water pipes 28, 29 and 30. The cooling water w guided to the condenser 2 flows inside the cooling pipe 5, raises the temperature by heat exchange with steam passing outside the cooling pipe 5, and then is discharged from the condenser 2 and circulated water. The pipe 31, 32, 33 is led to the condenser 3. The cooling water 9 guided to the condenser 3 flows inside the cooling pipe 6, raises the temperature by heat exchange with steam passing outside the cooling pipe 6, and then is discharged from the condenser 3 and circulated water. It is discharged through the pipe 34.

  In FIG. 2, the condensers are not arranged on the same center line, but are arranged so that the positions of the cooling water outlet part of the condenser 1 and the cooling water inlet part of the condenser 2 are aligned. Further, the cooling water outlet portion of the condenser 2 and the cooling water inlet portion of the condenser 3 are arranged so as to be aligned. That is, l1 and l2, l3 and l4, and l5 and l6 are made to coincide with each other.

  In FIG. 2, the condensate pump 22 that discharges the condensate from the hot well of the condenser 3 is arranged so that the positions of the cooling water outlet portion of the condenser 2 and the cooling water inlet portion of the condenser 3 are aligned. By using a large space generated on the opposite side, the condenser 3 is disposed in the vicinity.

  Thereby, since the positional relationship of the cooling water inlet part of the condenser 2 and the cooling water outlet part of the condenser 3 has shifted | deviated largely, the space which can arrange | position the condensate pump 22 in the vicinity of the condenser 3 is made. Yes. For this reason, the pipe connecting the condenser 3 and the condensate pump 22 can be shortened, that is, the pipe loss can be reduced.

[Third Embodiment (FIG. 3)]
A third embodiment of the present invention will be described with reference to FIG.

  FIG. 3 is a plan view showing an example of the configuration of a condenser according to claim 3 of the present invention, and the components will be described below. In FIG. 3, reference numerals 27 to 34 denote circulating water pipes that guide the cooling water w to the condensers 1, 2, and 3. That is, the cooling water w is first guided to the condenser 1 by the circulating water pipe 27, and the temperature of the cooling water w flowing inside the cooling pipe 4 is increased by heat exchange with steam passing outside the cooling pipe 4. Thereafter, the water is discharged from the condenser 1 and led to the condenser 2 through the circulating water pipes 28, 29 and 30. The cooling water w guided to the condenser 2 flows inside the cooling pipe 5, raises the temperature by heat exchange with steam passing outside the cooling pipe 5, and then is discharged from the condenser 2 and circulated water. The pipe 31, 32, 33 is led to the condenser 3. The cooling water 9 guided to the condenser 3 flows inside the cooling pipe 6, raises the temperature by heat exchange with steam passing outside the cooling pipe 6, and then is discharged from the condenser 3 and circulated water. It is discharged through the pipe 34.

  According to the present embodiment, as shown in FIG. 3, the condensers are not arranged on the same center line, but instead of the cooling water outlet part of the condenser 1 and the cooling water inlet part of the condenser 2. Arranged to align the positions. Further, the cooling water outlet portion of the condenser 2 and the cooling water inlet portion of the condenser 3 are arranged so as to be aligned. That is, l1 and l2, l3 and l4, and l5 and l6 are made to coincide with each other.

  Therefore, as shown in FIG. 3, the drain recovery piping from the various heat exchangers such as the feed water heater and moisture separation heater to the condenser is only connected to the drain recovery piping to the condensers 1 and 3. In addition, a drain recovery pipe is also connected to the condenser 2 disposed in the center and the condenser 3 inside.

  That is, since the positional relationship between the cooling water inlet portion of the condenser 1 and the cooling water outlet portion of the condenser 2 is greatly deviated, a space is provided for connecting the drain recovery pipe 37 to the condenser 2. In addition, since the positional relationship between the cooling water inlet of the condenser 2 and the cooling water outlet of the condenser 3 is greatly deviated, there is a space for connecting the drain recovery pipes 39 and 40 inside the condenser 3. Yes.

  According to the present embodiment, not only the drain recovery pipe connection to the condensers 1 and 3 but also the drain recovery pipe connected to the condenser 2 disposed in the center and the condenser 3 inside can be connected. Therefore, since the drain recovery pipe connection is equalized to each condenser, the drain recovery pipe connection to the condensers 1 and 3 is increased, and the drain recovery pipe is complicated, or the drain to the condensers 1 and 3 is complicated. This has the effect of solving the problem that the condenser pipes 1 and 3 have to be enlarged due to insufficient recovery pipe connection space.

The block diagram which shows the structure of the condenser by the 1st Embodiment of this invention. The block diagram which shows the structure of the condenser by the 2nd Embodiment of this invention. The block diagram which shows the structure of the condenser by the 3rd Embodiment of this invention. The block diagram which shows the structure of the condenser by a prior art example. The block diagram which shows the structure of the condenser by a prior art example. The block diagram which shows the structure of the condenser by a prior art example.

Explanation of symbols

1, 2, 3 Condenser 4, 5, 6 Cooling pipe w Cooling water 16, 17, 18 Condenser hot well 19, 20, 21 Condensate 22 Condensate pump 23 Feed water pump 24 Reactor 25 High-pressure turbine 26 Power generation Machines 27-34 Circulating water piping 35-40 Drain recovery piping

Claims (4)

A condenser facility in which a plurality of condensers having different condenser body lengths are arranged in parallel, and these condensers are connected in series by circulating water piping, and the trunk length of each condenser is A condensing device characterized in that the direction center position is varied in the length direction, and the lengths of the inlet side circulating water piping and the outlet side circulating piping of the condensers adjacent to each other are matched. . Condensation equipment with multiple condensers that supply steam generated at the power plant to the steam turbine, rotate the generator, cool the exhaust steam to condensate, and the length of the condenser body In a condensing facility in which a plurality of condensers of different condensers are arranged in parallel and these condensers are connected in series by circulating water piping, the center position in the trunk length direction of each condenser is in the length direction. A condensing device characterized in that the lengths of the inlet-side circulating water piping and the outlet-side circulating piping of the condensers adjacent to each other are made to coincide with each other. A large space on the opposite side created by arranging multiple condensers with different sizes and aligning the cooling water outlet of the condenser with the cooling water inlet of the adjacent condenser. The condensate facility according to claim 1 or 2, wherein a condensate pump is disposed in the vicinity of the condenser. A large space on the opposite side created by arranging three condensers of different sizes and aligning the cooling water outlet part of the condenser and the cooling water inlet part of the adjacent condenser. The condensate facility according to claim 1 or 2, wherein a drain recovery pipe is connected to a condenser installed in the center.

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