JP5546853B2 - Condenser and condenser assembly method - Google Patents

Description

  The present invention relates to a condenser applied to a power plant and a method for assembling the condenser.

  The configuration of a condenser applied to a power plant (thermal power plant or the like) is shown in FIG.

  In power plants, condensers are generally used to cool and condense steam. The condenser includes a plurality of heat transfer tubes 101 through which cooling water flows, a tube plate 102 that supports the plurality of heat transfer tubes 101 at both ends, a support plate 103 that supports portions other than both ends of the plurality of heat transfer tubes 101, and a plurality of heat transfer tubes. A main body 104 provided so as to enclose the heat pipe 101, a tube plate 102, and a water chamber 105 having a seawater inlet and outlet for flowing cooling water into the heat transfer pipe 101 are configured as main elements. Hereinafter, a group of the plurality of heat transfer tubes 101 is referred to as a tube bundle.

  A body 107 is connected to an upper portion of the main body body 104 and is connected to a steam turbine via a turbine connection unit 108.

  In the condenser shown in FIG. 9, when exchanging the tube bundle due to aging of the plant, increasing the capacity of the power generation facility, etc., a tube bundle unit in which the tube bundle to be exchanged is integrated is generally manufactured at the factory, and the existing tube bundle is manufactured. The method of replacing the unit is short in construction period and low in cost.

  However, since the condenser is very large and the tube bundle has a large structure, the tube bundle is divided and manufactured due to the problem of securing the installation space on the site and transportation, and transporting them to the site, Assembly and installation are performed at the site. Patent Documents 1 to 3 can be cited as methods for joining the separately manufactured tube bundles.

  Patent Document 1 describes a method of forming a short tube bundle in which a plurality of heat transfer tubes having a short length are fixed by a tube plate and a connection plate in a factory, and connecting the short tube bundles on site. Patent Document 2 describes a method in which a plurality of small tube bundles in which a small number of electric heating tubes are fixed with tube sheets are formed at a factory, and the tube sheets of the small tube bundles are joined together by welding. Patent Document 3 proposes a method in which tube sheets of similar small tube bundles are fastened and fixed with bolts.

JP 2001-201272 A JP 2001-272183 A JP 2003-240478 A

  All of the techniques disclosed in Patent Documents 1 to 3 connect tube sheets of small tube bundles manufactured at a factory to each other by welding or bolting. In such a method, if the tube sheets are distorted or the like, the dimensions may be shifted when they are joined together, and may not match the dimensions of the existing joint on the water chamber side. In addition, when joining is performed by welding, the members are thermally deformed. Further, when adjusting the dimensions, it takes a lot of time to adjust the dimensions, and it may take a lot of time and cost to complete the assembly.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a condenser and a condenser assembling method capable of easily and quickly attaching a tube bundle to a water chamber.

  A condenser according to an aspect of the present invention is a condenser in which a heat transfer tube group is attached to a water chamber flange of a water chamber via a tube plate, and constitutes a part of the heat transfer tube group, with first ends at both ends. Of the first small tube bundle to which the small tube plate is attached and the remaining part of the heat transfer tube group, the second small tube bundle to which the second small tube plate is attached to both ends, and the water chamber flange. A connecting plate that is located at the center and has both ends joined to the water chamber flange and forms a common surface together with the water chamber flange; and the first small tube plate and the second small tube plate, Without connecting them together, the first small tube plate is attached to a common first surface constituted by the water chamber flange and the connecting plate, and the second small tube plate is connected to the water chamber flange. It is attached to a common second surface composed of the connecting plate. .

  ADVANTAGE OF THE INVENTION According to this invention, the assembly method of the condenser and condenser which enabled it to attach to a water chamber of a tube bundle easily and for a short time can be provided.

FIG. 1 is a view showing a cross-sectional shape when two small tube bundles with small tube plates and a water chamber arranged in the main body of the condenser according to the first embodiment of the present invention are viewed from the front. FIG. 2 (a) is a diagram showing a cross-sectional shape of the two small tube bundles with small tube plates when viewed from the front direction, and FIG. 2 (b) shows the two small tube bundles with small tube plates from the side direction. It is a figure which shows the shape when it sees. Fig.3 (a) is a figure which shows the shape when the said water chamber is seen from the side surface, FIG.3 (b) is a figure which shows the cross-sectional shape when the said water chamber is seen from the front. 4A is a diagram showing a main part of the cross-sectional shape in the AA portion in FIG. 3, and FIG. 4B is a main portion of the cross-sectional shape in the BB portion in FIG. FIG. FIGS. 5A and 5B are diagrams showing a modification of the structure shown in FIG. FIG. 6 is a diagram showing still another modification of the structure shown in FIG. Fig.7 (a) is a figure which shows a shape when the water chamber arrange | positioned at the condenser which concerns on the 2nd Embodiment of this invention is seen from upper direction. FIG.7 (b) is a figure which shows a shape when the water chamber is seen from the front. FIGS. 8A and 8B are diagrams showing a modification of the structure shown in FIG. FIG. 9 is a diagram showing a configuration of a general condenser.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
Initially, the 1st Embodiment of this invention is described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the element which is common in the structure shown in above-mentioned FIG. 9, and the description is abbreviate | omitted.

  FIG. 1 is a view showing a cross-sectional shape when two small tube bundles with small tube plates and a water chamber arranged in the main body of the condenser according to the first embodiment of the present invention are viewed from the front. FIG. 2A is a view showing a cross-sectional shape of the two small tube bundles with small tube plates when viewed from the front direction, and FIG. 2B is a side view of the two small tube bundles with small tube plates. It is a figure which shows a shape when it sees from a direction. Moreover, Fig.3 (a) is a figure which shows the shape when the said water chamber is seen from the side surface, FIG.3 (b) is a figure which shows the cross-sectional shape when the said water chamber is seen from the front. .

  The condenser according to the first embodiment has two small tube bundles 1 a and 1 b that are arranged vertically in the main body trunk 104. The 1st small tube bundle 1a comprises a part (for example, half) of the heat exchanger tube group of the whole condenser, and is equipped with the 1st small tube plate 2a in the both ends. Moreover, the 2nd small tube bundle 1b comprises the remaining part (for example, half) of the heat exchanger tube group of the whole condenser, and is equipped with the 2nd small tube plate 2b at both ends.

  As shown in FIG. 2 (b), the first small tube plate 2a and the second small tube plate 2b are respectively formed in the central portion of the first small tube bundle 1a and the second small tube bundle 1b. A plurality of holes for passing through the heat transfer tubes are provided. That is, one hole corresponds to one heat transfer tube. The individual heat transfer tubes are passed through the respective holes and attached to the inside of the holes by welding or the like. Further, as shown in FIG. 2B, a water chamber flange 3 and a connecting plate 5 on the water chamber side, which will be described later, are provided in the area around the center of the first small tube plate 2a and the second small tube plate 2b. There are provided a plurality of holes for passing bolts used for joining with.

  The condenser of the first embodiment has a water chamber 4 provided with a water chamber flange 3. A connecting plate 5 is joined to the water chamber flange 3. The connecting plate 5 is located at the center of the water chamber flange 3, and both ends thereof are joined to the water chamber flange 3 to constitute one common surface together with the water chamber flange 3. For example, as shown in FIG. 3A, the water chamber flange 3 and the connecting plate 5 are provided with holes for passing bolts used for joining to the first and second small tube plates 2. .

  4A is a diagram showing a main part of the cross-sectional shape in the AA portion in FIG. 3, and FIG. 4B is a main portion of the cross-sectional shape in the BB portion in FIG. FIG.

  As shown in FIGS. 4A and 4B, the first small tube plate 2a and the second small tube plate 2b do not need to be connected to each other.

  As shown in FIG. 4A, in the AA portion in FIG. 3, the first small tube plate 2 a is attached to a common first surface constituted by the water chamber flange 3 and the connecting plate 5. It is done. Similarly, the 2nd small tube board 1b is attached to the 2nd common surface comprised with the water chamber flange 3 and the connecting board 5. FIG.

  For example, the first small tube plate 2a is fastened and fixed to the first surface by using bolts 6 with the rubber packing 11 interposed therebetween. Similarly, the second small tube plate 2b is fastened and fixed to the second surface with bolts 6 with the rubber packing 11 interposed therebetween. At this time, the lining 12 is provided on the water chamber flange 3 and the connecting plate 5 on the water chamber side, and then tightening and fixing with the bolt 6 is performed.

  Further, in the example of FIG. 4 (a), there is a portion where the bolt 6 penetrates the connecting plate 5 and protrudes toward the water chamber side, and the portion is covered with a filler 10 so as not to be exposed, and a titanium cover is further formed thereon. 8, and the titanium cover 8 is fixed to the connecting plate 5 by the titanium bolt 7. Thereby, it can prevent that the volt | bolt 6 deteriorates with the liquid of the water chamber side, or a liquid leak arises through the penetration part of the volt | bolt 6.

  Further, as shown in FIG. 4B, in the BB portion in FIG. 3, the first small tube plate 2 a is attached to the water chamber flange 3, and the second small tube plate 1 b is also connected to the water chamber flange 3. It is attached.

  FIGS. 5A and 5B are diagrams showing a modification of the structure shown in FIG.

  In the example of FIG. 4, there is a portion in which the bolt 6 penetrates the connecting plate 5 and protrudes toward the water chamber side. However, in the example of FIG. 5, the implanted bolt that penetrates partway through the connecting plate and does not protrude toward the water chamber side. 9 is used. Thereby, the filler 10, the titanium cover 8, and the titanium bolt 7 become unnecessary, and liquid leakage and bolt deterioration can be reliably prevented.

  FIG. 6 is a diagram showing still another modification of the structure shown in FIG.

  In the example of FIG. 4 and the example of FIG. 5, the bolt 6 and the implanted bolt 9 are used for joining the first small tube plate 2 a and the connecting plate 5 and joining the second small tube plate 2 b and the connecting plate 5. In the example of FIG. 6, welding is employed without using bolts. That is, the first small tube plate 2a and the connecting plate 5 are joined by welding, and the second small tube plate 2b and the connecting plate 5 are joined by welding. Thereby, the number of bolts used for assembly can be reduced, and the drilling process for passing the bolts can be reduced. In this case, the structure of the BB portion in FIG. 3 is the same as the example of FIGS. 4B and 5B.

  In the assembly of the condenser according to the first embodiment, the first small tube bundle 1a having the first small tube plates 2a attached to both ends is manufactured at the factory in advance, and the second small tubes are formed at both ends. The second small tube bundle 1b to which the small tube plate 2b is attached is manufactured and transported to the plant site. And the 1st small tube board 2a attached to the 1st small tube bundle 1a is attached to the 1st common surface comprised by the water chamber flange 3 and the connecting plate 5 by the side of the water chamber 4, and 2nd The second small tube plate 2 b attached to the small tube bundle 1 b is attached to a common second surface constituted by the water chamber flange 3 and the connecting plate 5. In that case, the operation | work which connects the 1st small tube plate 2a and the 2nd small tube plate 2b mutually is not performed.

  Thus, according to 1st Embodiment, the conventional problems which connected the small tube sheets are solved. Moreover, since it is not necessary to connect the small tube plates, the tube plate can be reduced in size.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.

  Fig.7 (a) is a figure which shows a shape when the water chamber arrange | positioned at the condenser which concerns on the 2nd Embodiment of this invention is seen from upper direction. FIG.7 (b) is a figure which shows a shape when the water chamber is seen from the front.

  The second embodiment is different from the first embodiment in the structure relating to the water chamber flange of the water chamber 4. In the first embodiment described above, the connecting plate 5 is attached to the water chamber flange 3. However, in the second embodiment, the connecting plate 5 is not necessary. Further, the structure of the water chamber flange 3 is different from the structure shown in FIG. 3A of the first embodiment described above.

  The water chamber flange 3 according to the second embodiment has a surface having the same shape as the surfaces of the two small tube plates 2 shown in FIG. 2B of the first embodiment described above. That is, the water chamber flange 3 according to the second embodiment is divided into a first water chamber flange 3a having a first surface and a second water chamber flange 3b having a second surface. The first small tube plate 1a is attached to the surface of the first water chamber flange 3a, and the second small tube plate 1b is attached to the surface of the second water chamber flange 3b.

  In the assembly of the condenser according to the second embodiment, the first small tube bundle 1a with the first small tube plates 2a attached to both ends is manufactured in advance at the factory, and the second bundle is formed at both ends. The second small tube bundle 1b to which the small tube plate 2b is attached is manufactured and transported to the plant site. Up to this point, the process is the same as in the first embodiment. And the 1st small tube sheet 2a attached to the 1st small tube bundle 1a is attached to the surface of the 1st water chamber flange 3a by the side of the water chamber 4, and is attached to the 2nd small tube bundle 1b. Two small tube plates 2b are attached to the surface of the second water chamber flange 3b. In that case, the operation | work which connects the 1st small tube plate 2a and the 2nd small tube plate 2b mutually is not performed.

  FIGS. 8A and 8B are diagrams showing a modification of the structure shown in FIG.

  In the example of FIG. 7, the number of the water chamber 4 is one, but in the example of FIG. 8, the water chamber 4 is divided into two.

  That is, the water chamber 4 is divided into a first water chamber 4 a having a first water chamber flange 3 and a second water chamber 4 b having a second water chamber flange 3. Thereby, each of the small tube bundle 1, the small tube plate 2, the water chamber flange 3, and the water chamber 4 is arranged two by two, and the performance of the condenser can be further improved.

  Thus, according to 2nd Embodiment, attachment of a connecting plate to a water chamber flange becomes unnecessary, and a water chamber flange can be manufactured easily. Moreover, since it is not necessary to connect the small tube plates, the tube plate can be reduced in size.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Small tube bundle, 2 ... Small tube plate, 3 ... Water chamber flange, 4 ... Water chamber, 5 ... Connecting plate, 6 ... Bolt, 7 ... Titanium bolt, 8 ... Titanium cover, 9 ... Implantation bolt, 10 ... Filler, DESCRIPTION OF SYMBOLS 11 ... Rubber packing, 12 ... Lining, 101 ... Heat-transfer tube, 102 ... Tube plate, 103 ... Branch plate, 104 ... Main body trunk, 105 ... Water chamber, 107 ... Body, 108 ... Turbine connection part.

Claims (6)

In the condenser where the heat transfer tube group is attached to the water chamber flange of the water chamber via the tube plate,
Constituting a part of the heat transfer tube group, a first small tube bundle in which first small tube plates are attached to both ends; and
Constituting the remaining part of the heat transfer tube group, a second small tube bundle having a second small tube plate attached to both ends; and
Located at the center of the water chamber flange, both ends are joined to the water chamber flange, and a connecting plate that forms one common surface with the water chamber flange,
Without connecting the first small tube plate and the second small tube plate to each other, the first small tube plate is attached to a common first surface constituted by the water chamber flange and the connecting plate. A condenser having the second small tube plate attached to a common second surface constituted by the water chamber flange and the connecting plate. The condenser according to claim 1,
The first small tube plate is attached to the first surface using a bolt, and the second small tube plate is attached to the second surface using a bolt. Condenser. The condenser according to claim 2,
A condenser having a portion through which the bolt penetrates the connecting plate and projecting toward the water chamber, and a member covering the projecting portion so as not to be exposed is provided. The condenser according to claim 2,
The condenser which uses the implantation bolt which penetrates to the middle of the said connection board and does not protrude to the water chamber side is used. The condenser according to claim 1,
The condenser, wherein the first small tube plate and the connecting plate are joined by welding, and the second small tube plate and the connecting plate are joined by welding. In the assembly method of the condenser in which the heat transfer tube group is attached to the water chamber flange of the water chamber via the tube plate,
Attach the connecting plate to the center of the water chamber flange so that both ends are joined to the water chamber flange,
A part of the heat transfer tube group is formed, a first small tube bundle having a first small tube plate attached to both ends is prepared, the remaining part of the heat transfer tube group is formed, Prepare a second bundle of small tubes with two small tube plates attached,
Without connecting the first small tube plate and the second small tube plate to each other, the first small tube plate is attached to a common first surface constituted by the water chamber flange and the connecting plate. A condenser assembly method, wherein the second small tube plate is attached to a common second surface constituted by the water chamber flange and the connecting plate.

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