JP2002206873A - Vacuum detecting pipe system for condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum detecting pipe system for a condenser which can perform accurate measurement. SOLUTION: This system is provided with a condenser 21, a detecting pipe 22 whose one end opens in the above condenser 21 and whose other end extends downward, a drain stay header 25 to which the other end of that detecting pipe 22 is connected and which separates drain from the fluid supplied from the above condenser 21, and a gauge board header 30 which is provided above the drain stay header 25 and is supplied with the fluid from the drain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vacuum detection piping system for a condenser used in a steam turbine or the like.

[0002]

2. Description of the Related Art A condenser is a device for cooling and condensing steam discharged from a steam turbine and returning it to water (drain). For example, a steam, a nuclear power plant, a combined power plant, etc. The system used for circulation includes
It is an essential component. Normally, the inside of such a condenser is set at a pressure lower than the atmospheric pressure, so that the steam from the steam turbine is sufficiently expanded to be easily condensed. The drain generated by condensation of the steam is drained from the condenser through a drain drain pipe, and is sent again to the boiler via a water supply pump or the like.

FIG. 6 shows a conventional vacuum detection piping system for a condenser. A plurality of condensers 1 are provided, and a detection pipe 2 for detecting the degree of vacuum extends from each condenser 1.
All of these detection pipes 2 are directly connected to one instrument panel header 3. A drain pipe 4 for returning drain to the condenser 1 is also connected to the instrument panel header 3.

[0004]

In the conventional condenser vacuum detection piping system, the instrument panel header 3 is provided on the same floor as the main valve of the detection pipe 2 of the condenser 1. A heater 5 is provided in this portion,
The detection pipe 2 and the drain pipe 4 need to be installed so as to avoid interference with the heater 5 and other pipes. For this reason,
The detection pipe 2 and the drain pipe 4 cannot be provided with a large gradient, and the horizontal portion increases. Due to this, the drain may stay in the horizontal portion in the detection pipe 2 and the drain pipe 4. As a result, the detected degree of vacuum fluctuates, and there is a problem that accurate measurement cannot be performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vacuum detection piping system of a condenser that can perform accurate measurement.

[0006]

According to a first aspect of the present invention, there is provided a vacuum detection piping system for a condenser, comprising: a condenser; a detection pipe having one end opened to the condenser and the other end extending downward; The other end of the detection pipe is connected, one drain retention header from which the drain is separated from the fluid supplied from the condenser,
An instrument panel header is provided above the drain retention header, and an instrument panel header to which a fluid from which drain is separated in the drain retention header is supplied.

In the present invention, the drain is once separated in the drain retention header. The drain retention header is set to have a size sufficient to retain the drain. Since the drain retention header is located below the opening on one end side of the detection pipe, a sufficient gradient can be provided to the pipe without increasing the height of the apparatus system.

According to a second aspect of the present invention, in the vacuum detection piping system for a condenser according to the first aspect, a plurality of the condensers are arranged adjacent to the drain retention header. And

In this invention, since the distance between each condenser and the drain retention header can be set short, the occurrence of drain retention in the detection pipe between the condenser and the drain retention header is avoided. . Also, by providing a common header without providing such a header for each condenser, the piping is simplified, and the installation work is facilitated.

According to a third aspect of the present invention, in the condenser vacuum detection piping system according to the first or second aspect, the drain retention header includes an upper header, a lower header, and an upper header and a lower header. And a communication pipe for communicating the

According to the present invention, the drain can be separated by increasing the capacity of the header without increasing the diameter of the header.

[0012] The invention according to claim 4 is the invention according to claims 1 to 3.
In any one of the condenser vacuum detection piping systems, the drain separated in the drain retention header is returned under the water in the condenser.

In the present invention, since the drain is returned directly into the water, dust and the like are prevented from adhering to the tip of the drain pipe.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a vacuum detection piping system of a condenser shown as a first embodiment of the present invention. In the figure, reference numerals 21, 21 and 21 are condensers. Each condenser 21 is provided with a detection pipe 22 having one end opened to the condenser 21 and the other end extending downward. Each detection pipe 22 is provided with a main valve 23. The other end of each of these detection pipes 22 is connected to one drain retention header 25. Each condenser 21
Is disposed adjacent to the drain retention header 25,
The detection pipe 22 is connected to the drain retention header 25 at a downward slope. In the drain retention header 25, each condenser 2
The drain is separated from the fluid supplied from 1 and the separated drain is connected to a lower drain pipe 27.
It is to be discharged from. Drain retention header 2
5 above the drain retention header 25 and the detection pipe 29.
An instrument panel header 30 is provided. The instrument panel header 30 is supplied with the fluid after the drain is separated in the drain retention header 25 via the detection pipe 29. Drain retention header 25
A header 35 is further provided below. The header 35 is connected to the drain pipe 27, and is further connected to the instrument panel header 30 by a drain pipe 36. One end of a drain pipe 38 is connected to the header 35. The other end of the drain pipe 38 is located below the water surface and opened in one condenser 21.

In the condenser vacuum detection piping system configured as described above, the fluid in the condenser 21 once flows into the drain retention header 25 via the detection piping 22. The drain is separated in the drain retention header 25, and flows into the header 35 through the drain pipe 27. Then, the water is sent below the water surface of the condenser 21 through the drain pipe 38. on the other hand,
The gas in the drain retention header 25 communicates with the instrument panel header 30 via the detection pipe 29, and the degree of vacuum of the gas is measured.

As described above, the following effects can be obtained in the condenser vacuum detection piping system of the present invention. The fluid in the condenser 21 is temporarily drained by the drain retention header 25.
And drain is separated there, so that stagnation of the drain in each pipe is prevented. Since the drain retention header 25 is sufficiently large, the separated drain is
It does not flow into zero. Since the drain retention header 25 is located below the opening of the detection pipe 22 on the condenser 21 side, the pipe 22 can have a sufficient gradient without increasing the height of the apparatus system. Further, since the condenser 21 is disposed adjacent to the drain retention header 25, the distance between each condenser 21 and the drain retention header 25 can be set short, and the drain of the detection pipe 22 can be reduced. The occurrence of stagnation can be avoided. In addition, by providing a common header 25 without providing such a header for each condenser 21, the piping is simplified and the installation work can be easily performed. Further, since the end of the drain pipe 38 is open to the water in the condenser 21, the drain is directly returned to the water. Therefore, there is no possibility that dust or the like adheres to the tip of the drain pipe 38 to prevent the drain from being discharged.

It should be noted that a sufficiently large drain retention header 2
When space cannot be taken for the space for arranging 5, FIG.
However, not all the condensers need to be adjacent to the drain retention header 25 as illustrated in FIG. The drain retention header 25 ′ in the figure is configured to be shorter in the longitudinal direction than the drain retention header 25 in FIG. 1 and is adjacent to only one condenser 21. Further, as shown in FIG.
A plurality of detection pipes 22 may be used to connect one to the drain retention header 25.

Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 4, reference numeral 40 denotes a drain retention header. The drain retention header 40 includes an upper header 41, a lower header 42,
A plurality of communication pipes 43 connecting the upper header 41 and the lower header 42 are formed. The upper header 41 and the lower header 42 are located vertically.

In this embodiment, the drain separated from the fluid flowing into the drain retention header 40 flows into the lower header 42, and then returns from the header 35 to the condenser 21. With such a configuration, unlike the drain retention header 25 shown in FIG. 1 and the like, the upper header 41 and the lower header 42 are gaseous without increasing the cross-sectional area of the upper header 41 and the lower header 42. The drain can be separated, and a sufficient amount of drain can be separated.

As shown in FIG. 5, one condenser 2
A plurality of detection pipes 22 may be used to connect one and the drain retention header 40.

[0021]

As described above, the condenser vacuum detection piping system of the present invention has the following effects. According to the first aspect of the present invention, since the drain is once separated in the drain retention header, the retention of the drain in the pipe can be prevented. Since the drain retention header is located below the opening on one end side of the detection pipe, a sufficient gradient can be provided to the pipe without increasing the height of the apparatus system.

According to the second aspect of the present invention, since the distance between each condenser and the drain retention header can be set short, the drainage in the detection pipe between the condenser and the drain retention header can be reduced. The occurrence of stagnation can be avoided. Further, by providing a common header without providing such a header for each condenser, piping can be simplified.

According to the third aspect of the invention, the drain can be separated by increasing the capacity of the header without increasing the diameter of the header. According to the fourth aspect of the present invention, since the drain is directly returned to the water, there is no possibility that dust or the like adheres to the end of the drain pipe to prevent the drain from being discharged.

[Brief description of the drawings]

FIG. 1 is a vacuum detection piping system of a condenser shown as a first embodiment of the present invention.

FIG. 2 is a modified example of the vacuum detection piping system of the condenser.

FIG. 3 is a modified example of the vacuum detection piping system of the condenser.

FIG. 4 is a vacuum detection piping system of a condenser shown as a second embodiment of the present invention.

FIG. 5 is a modified example of the vacuum detection piping system of the condenser.

FIG. 6 shows a conventional vacuum detection piping system for a condenser.

[Explanation of symbols]

 21 condenser 22 detection pipe 25, 25 ', 40 drain retention header 30 instrument panel header 41 upper header 42 lower header 43 communication pipe

Claims (4)

[Claims] 1. A condenser, one end of which is open to the condenser,
The other end of the detection pipe extending downward at the other end, the other end of the detection pipe is connected, one drain retention header from which the drain is separated from the fluid supplied from the condenser, and above the drain retention header A vacuum detection piping system for a condenser, further comprising: an instrument panel header provided at a position and supplied with a fluid from which drain is separated at the drain retention header. 2. The condenser vacuum detection system according to claim 1, wherein a plurality of the condensers are arranged adjacent to the drain retention header. Detection piping system. 3. The condenser vacuum detection piping system according to claim 1, wherein the drain retention header includes an upper header, a lower header,
A vacuum detection piping system for a condenser, comprising: a communication pipe connecting the upper header and the lower header. 4. The vacuum detection piping system for a condenser according to claim 1, wherein the drain separated in the drain retention header is:
A vacuum detection piping system for a condenser, wherein the condenser is returned below the surface of the water in the condenser.