JPH0666485A - Jet condensor - Google Patents

Abstract

(57) [Summary] [Objective] The bottom plate of the main body of a casing of a jet condenser is provided with a stay provided in the main body to withstand the compressive force due to the vacuum of the casing. [Structure] A bottom plate stay 20 and a cooling water mother pipe 13 which connect the bottom plate 5 of the main body body 3 to the bottom plate 5, the cooling water rising pipe 16a, and the lower surface of the cooling water mother pipe 13 at the place where the cooling water rising pipe 16 directly rises. It is reinforced by the bottom plate stay 20a connected to the lower surface and is reinforced by the corner stays 24, 26 provided at the corners formed by the bottom plate 5 and the side walls 23, 25 respectively connected to the bottom plate 5 and the side walls 23, 25. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet condenser for cooling and condensing steam by cooling water sprayed from a spray nozzle, and more particularly to a jet condenser for a geothermal steam turbine.

[0002]

2. Description of the Related Art A condenser used in a geothermal steam turbine for geothermal power generation has a jet condenser that cools and condenses the steam discharged from the steam turbine by using cooling water sprayed from a spray nozzle. A structure having a structure shown in FIG. 6 which is a sectional view taken along the line AA of FIG. 5 and FIG. 5 is known.

In FIGS. 5 and 6, the casing 2 of the jet condenser is composed of a main body 3 and a quadrangular pyramid-shaped upper body 4 attached to the upper part thereof. The bottom plate 5 of the main body 3 has a thickness of about 40 mm, and is installed on the foundation 7 by dozens of M36 anchor bolts 6 arranged in a grid pattern at intervals of about 1 m to withstand the compressive force of the vacuum in the jet condenser 1. Has been. The installation state of the anchor bolt 6 is shown in FIG. In FIG. 7, the anchor bolt 6 is inserted into the box punching hole 8 provided in the base 7 through the through hole 9 having a diameter of 150 mm of the bottom plate 5 and fastened to the bottom plate 5 with a nut. The bottom plate 5 is installed on the foundation 7 by pouring grout 10 between and. Reference numeral 11 is a cap that covers the tightening portion of the anchor bolt 6.

A drain pipe 12 is provided at the center of the bottom plate 5 for discharging cooling water for cooling and condensing steam and condensed water condensed by the cooling water to the outside. In the main body 3, two cooling water mother pipes 13 are arranged in parallel in the horizontal direction. Reference numeral 15 is a bellow that absorbs thermal expansion. The cooling water riser pipe 1 which is provided directly upright on the cooling water mother pipe 13
A large number of 6 are provided at substantially the same intervals as the anchor bolts 6, and the cooling water rising pipes 16 provided in the cooling water mother pipes 13 are provided between the opposing cooling water mother pipes 13 so as to be horizontal every other space. The cooling water rising pipes 16a extending in the right angle direction and provided upright are provided in a line. A support 14 is welded to support the cooling water mother pipe 13 and the cooling water rising pipes 16 and 16a.

The cooling water rising pipes 16 and 16a are supported by a horizontal stay 18 vertically and horizontally attached to the side wall of the body case 3 and the partition wall 17 so as to restrain the movement in the horizontal direction. The horizontal stays 18 are attached to the cooling water rising pipes 16 and 16a at a plurality of positions in the height direction. Here, the rigidity of the main body 3 is also increased by the horizontal stay 18. The cooling water rising pipes 16 and 16a are provided with spray nozzles 19 for injecting cooling water at a plurality of positions in the height direction at four positions around the cooling water rising pipes 16 and 16a.

With such a configuration, the cooling water flowing into the cooling water mother pipe 13 is jetted from the spray nozzle 19 of the cooling water rising pipes 16 and 16a. In this state, when the steam discharged from the steam turbine flows into the main body 3 through the upper cylinder 4, the steam is cooled and condensed by the cooling water injected from the spray nozzle 19 to become condensed water, and A vacuum is created in the casing 2 including the upper body 4.

The cooling water obtained by cooling and condensing the steam and the condensate are discharged from the drain pipe 12 to the outside.

[0008]

[Problems to be Solved by the Invention] Jet condenser 1
Since the inside of the casing 2 becomes a vacuum, the bottom plate 5 of the main body 3 is
In order to withstand the compressive force of this vacuum, the anchors 6 are installed on the foundation 7 by the anchor bolts 6 provided in a grid shape as described above. For this reason, the bottom plate 5 has a large number of through holes 9 for the anchor bolts 6, such as several tens, and thus has a drawback that it takes a lot of labor and cost to manufacture.

Further, since the casing 2 of the jet condenser 1 is a welded structure, it is necessary to carry out a water tension test at the factory and confirm that there is no defect in the welded portion before shipment. Therefore, in the case of the water tension test, the through hole 9 provided in the bottom plate 5 is to be drilled after the water tension test, or a blind cap or the like must be provided in the case of drilling first, which is a great labor and manufacturing effort. And there is a drawback that it is costly.

Further, since the bottom plate 5 of the main body 3 is placed on the foundation 7, it is fixed by the anchor bolts 6 during installation.
Since it is necessary to pour grout on the entire lower surface of the above, this also has a drawback that it requires a lot of labor and cost. Further, the thinning of the plate thickness of the upper body 4 of the casing 2 was also examined. The object of the present invention is to obtain the rigidity of the bottom plate of the main body of the casing to withstand the compressive force of the vacuum in the condenser without requiring much labor and cost, and to reduce the plate thickness of the upper cylinder. It is to provide a jet condenser.

[0011]

In order to solve the above-mentioned problems, according to the present invention, a casing composed of an upper cylinder through which steam flows and a main cylinder connected to the upper cylinder, and a main cylinder that penetrates a side wall of the main cylinder It has a cooling water mother pipe horizontally arranged inside and a spray nozzle that branches from this mother pipe and rises up to inject cooling water. In a jet condenser having a cooling water rising pipe arranged in a distributed manner and cooling and condensing steam flowing into a casing by cooling water jetted from the spray nozzle, a bottom plate of a main body body, a cooling water mother pipe, and a cooling water rising pipe. A bottom plate stay provided to be connected to the pipe, and a corner stay provided to be connected to the bottom plate and the side wall at a corner portion formed by the bottom plate and the side wall of the main body body. .

In the above jet condenser, the bottom plate stay is provided so as to be connected to the bottom plate of the main body and at least the lower surface of the cooling water rising pipe and the lower surface of the cooling water mother pipe where the cooling water rising pipe directly rises. . Further, in the above-mentioned jet condenser, an upper body stay connected to the side wall of the upper body and the cooling water rising pipe is provided.

[0013]

The bottom plate of the main body of the casing of the jet condenser is a bottom plate stay connected to a cooling water mother pipe and a large number of cooling water rising pipes arranged in the main body body. The bottom plate stay serves as the bottom plate stay and at least the cooling water. The riser pipes and the cooling water riser pipes are reinforced by bottom plate stays which are connected to the lower surface of the cooling water mother pipe at a portion where they directly rise and are provided in a distributed manner. In this case, the compressive force applied to the bottom plate by the vacuum in the casing is evenly applied to the cooling water rising pipe whose horizontal movement is restricted by the stay.

Further, the corner portion formed by the bottom plate and the side wall of the main body body is provided with a corner portion stay connected to the bottom plate and the side wall to reinforce the corner portion. Therefore, due to the large number of bottom plate stays and the corner stays described above, the bottom plate of the main body cylinder can withstand the compressive force of the vacuum in the casing. Therefore, it is not necessary to install the bottom plate on the foundation with a large number of anchor bolts as in the conventional case.

Further, in the jet condenser of the above construction, by providing the upper body stay for connecting the upper body and the cooling water rising pipe, the upper body of the casing is reinforced and withstands the compressive force due to the vacuum in the casing. The plate thickness of the upper body can be reduced, and the weight of the casing can be reduced.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a jet condenser according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line CC of FIG. 1 and 2, the same parts as those of the conventional example of FIGS. 5 and 6 are designated by the same reference numerals, and the description thereof will be omitted. 1 and 2
The following points are different from the conventional example.

A bottom plate stay 20 is provided so as to be connected to the bottom plate 5 of the main body 3 and the lower surface of the cooling water mother pipe 13 and the lower surface of the cooling water rising pipe 16a where the cooling water rising pipe 16 directly rises. In addition, near the side wall of the main body 3, the cooling water rising pipe 16
A bottom plate stay 20a is provided at a position of the cooling water rising pipe 16 at a position where there is no cooling water mother pipe 13. In addition,
A support plate 22 is provided in the opening of the drainage pipe 12, and the cooling water rising pipe 1 facing the opening of the drainage pipe 12 is provided on the support plate 22.
The bottom plate stay 20 is attached to 6a. At this time, the distance between the bottom plate stays 20 and 20a is about 1 m, which is the same as in the conventional anchor bolt.

A corner stay 24 is formed at a corner portion formed by the bottom plate 5 of the main body 3 and a semicylindrical side wall 23 through which the cooling water mother pipe 13 penetrates, and a semicylindrical side wall 25 opposed to the side wall 23. A plurality of corner portion stays 26 are provided in the corner portion formed by the bottom plate 5 and the bottom plate 5. A support base 27 is provided on the bottom plate 5, and the jet condenser 1 is installed on the foundation 7 by anchor bolts 28 attached to the support base 27.

With such a structure, the bottom plate 5 of the body 3 of the casing 2 is located at the position of the cooling water rising pipe 16 where the cooling water rising pipe 16 directly rises, and also at the cooling water rising pipe 16.
It is reinforced by the bottom plate stay 20 at the position a, and is further reinforced by the bottom plate stay 20a at the same interval as the arrangement interval of the cooling water rising pipes at the location of the cooling water mother pipe 13 where the cooling water rising pipe is not branched.

Further, the corner portion formed by the bottom plate 5 without the bottom plate stays 20 and 20a and the side walls 23 and 25 is reinforced by the corner stays 24 and 26. Therefore, due to the above-mentioned bottom plate stays 20 and 20a and corner portion stays 24 and 26, the bottom plate 5 of the main body 3 has strength enough to withstand the compressive force of the vacuum in the casing 2.

FIG. 3 is a sectional view of a jet condenser according to another embodiment of the present invention, and FIG. 4 is a view taken in the direction of arrow D in FIG.
3 and 4, the side wall of the upper body 4 and the cooling water rising pipe 1
6 and 16a, except that the upper case stay 29 is attached and the same as in FIG. With such a configuration, the upper body stay 29 serves to reinforce the upper body 4 of the casing 2, so that the plate thickness of the upper body 4 of the casing 2 can be reduced.

[0022]

As is apparent from the above description, according to the present invention, the bottom plate of the main body of the casing is reinforced by the cooling water mother pipe and the cooling water rising pipe by the bottom plate stay, and the corner portion is Since it is reinforced by the corner stays, it has the strength to withstand the compressive force due to the vacuum in the casing, and as a result, it does not require much labor and cost for manufacturing, water tension test and installation as in the conventional case.

Further, since the upper shell of the casing is reinforced by the upper shell stay connected to the upper shell and the cooling water rising pipe, the plate thickness of the upper shell of the casing is thin and a lightweight jet condenser can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a jet condenser according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line CC of the jet condenser of FIG.

FIG. 3 is a sectional view of a jet condenser according to another embodiment of the present invention.

FIG. 4 is a view of the jet condenser of FIG. 3 as seen from the direction of arrow D.

FIG. 5 is a sectional view of a conventional jet condenser.

6 is a cross-sectional view taken along the line AA of the jet condenser of FIG.

FIG. 7 is a detailed view of part B of the jet condenser of FIG.

[Explanation of symbols]

 1 Jet Condenser 2 Casing 3 Main Body 4 Upper Body 5 Bottom Plate 13 Cooling Water Mother Pipe 16 Cooling Water Rise Pipe 16a Cooling Water Rise Pipe 20 Bottom Plate Stay 20a Bottom Plate Stay 24 Corner Stay 26 Corner Stay 29 Upper Body Stay

Claims (3)

[Claims] 1. A casing comprising an upper cylinder through which steam flows and a main cylinder connected to the upper cylinder, a cooling water mother pipe penetrating a side wall of the main cylinder and horizontally arranged in the main cylinder, and the mother pipe. In the casing, a spray nozzle that branches and rises and sprays cooling water is provided, and a horizontal movement is restrained and supported by stays, and a large number of cooling water rising pipes are distributed and arranged in the body barrel. In a jet condenser that cools and condenses the steam flowing into the cooling water by the cooling water jetted from the spray nozzle, a bottom plate stay connected to the bottom plate of the main body barrel and the cooling water mother pipe and the cooling water rising pipe, and a bottom plate of the main body barrel And a corner stay formed by connecting the bottom plate and the side wall to a corner formed by the side wall and the side wall. 2. The jet condenser according to claim 1, wherein the bottom plate stay is provided so as to be connected to the bottom plate of the main body body and at least the lower surface of the cooling water rising pipe and the cooling water mother pipe at a portion where the cooling water rising pipe directly rises. A jet condenser characterized by that. 3. The jet condenser according to claim 1, further comprising an upper body stay connected to the side wall of the upper body and the cooling water rising pipe.