JPS59119182A - Condenser - Google Patents

Abstract

PURPOSE:To increase reliability and durability, by preventing condensate streams falling from a group of cooling pipes from meeting exhaust streams from a turbine for driving a feed water pump. CONSTITUTION:The exhaust from a main turbine flows down from each upper opening 11, then after the exhaust is condensed by the cooling pipe groups 14, the resulting condensate falls from the cooling pipe groups 14 onto condensate receiving plates 19, and then flows through guide troughs 22 to reach opening sections 21 of hot well rool plates 17, from which it flows into hot wells 16. The exhaust from the feed water pump driving turbine is allowed to flow through feed water pump driving turbine exhaust pipes 18 horizontally into a space between each hot well roof plate 17 and each condensate receiving plate 19 in each condenser, diffuses in said space, and rises along the shorter sides 19c, 19d of each condensate receiving plate 19. Thus, the vertically falling condensate streams from the cooling pipe groups 14 and the horizontal exhaust streams from the feed water pump driving turbine are separated from each other by the condensate receiving plates 9 without meeting each other, so that the reliability of the condenser can be improved.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a condenser for a thermal power plant, and in particular to a condensate flow from a group of cooling pipes in the condenser and a water pump driving turbine (RFPT). The present invention relates to a condenser that can improve reliability and durability by providing a condensate receiving plate that separates it from the exhaust flow.

[Technical background of the invention]

Generally, the feedwater pump in a thermal power plant is driven by a steam turbine, and the exhaust gas from the turbine for driving the feedwater pump is introduced into a condenser together with the exhaust gas from the main turbine that drives the generator, where it is condensed and recovered. It has become. That is, as shown in Fig. 1 and the striped λ diagram, the exhaust gas from the main turbine is introduced into the condenser from above, and the main turbine exhaust gas is condensed by the cooling pipe group λ. At the same time, due to the exhaust pipe +, <z, which is connected almost horizontally to one side 3 of the main body body, the exhaust gas J of the water supply pump driving turbine flows into the condenser and is condensed, and becomes the main turbine exhaust gas. The condensed water is stored in a hot well located at the bottom.

[Problems with background technology]

However, the condensed water flow g of the main turbine exhaust and water supply pump driving turbine exhaust that falls from the cooling pipe group A to the roof plate 7 of the real well B, flows in the water pump driving turbine flowing in a horizontal direction. Exhaust flow!
4 butt against each other almost at right angles. The speed of the turbine exhaust flow j for driving the water supply pump is approximately / 00 m/sec.
e, and the flow rate is about / 00 tonA, so the falling condensate flow is accelerated to crush by the water supply pump driving turbine exhaust flow j, and the internal structure such as the reinforcing pipe pipe and the inner wall of the main body shell 3 are accelerated. In some cases, the nitrogen content in the condenser deteriorated due to gas being generated due to sweat mixing between the two streams, and the condenser became inoperable.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks of conventional condensers, prevents collision between the falling condensate flow from the cooling pipe group and the turbine exhaust flow for driving the water supply pump, and provides highly reliable and durable condensate water. The purpose is to provide equipment.

[Summary of the invention]

In order to achieve the above object, the present invention fixes a condensate receiving plate for receiving condensate falling from a cooling pipe group to the inner wall of the main body of the condenser, and then allows the water receiving plate to receive condensate from the cooling pipe group. The falling condensate flow and the turbine exhaust flow for driving the water supply pump are separated so that the two flows do not intersect, and a water receiving guide gutter is installed to guide the condensate on the condensate receiving plate to the real well. The water receiving plate is installed at an angle so that condensate can be completely stored in the hot well.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In the embodiment shown in FIG.
When using two condensers, the upper opening of each condenser
is connected to the exhaust pipe of the main turbine that rotates the generator, and the exhaust gas of the main turbine is introduced into the condenser through this upper opening l/. Furthermore, inside the condenser body shell/2, a large number of cooling pipes are installed on the support plate/3. /
3. ..., /3 A group of cooling pipes bundled in a bell shape /
Two units of 4' are arranged, and the exhaust gas of the main turbine is condensed by this cooling pipe group/hole. I got the support plate/
3. /3. ...13 is condensate water, a large number of auxiliary pipes provided so as to protrude upward from the bottom of the vessel/3. B,
..., 7.5, and this auxiliary pipe/3.
/3. ..., /j also holds the roof plate /7 of the hot well /O provided at the bottom of the condenser at the same time.

1. On one side of the condenser main body/unit, λ water supply pump driving turbine exhaust pipes/g are connected and opened almost horizontally directly above the hot well roof plate/7. ing. Through these water pump driving turbine exhaust pipes ig, ig, the exhaust gas of the water supply pump driving turbine enters the condenser almost horizontally, and then rises inside the condenser and flows into the cooling pipe group 1, / It has been condensed by Hiroshi.

Furthermore, this water supply pump driving turbine exhaust pipe/l, 1
At a position above the internal opening lδ-a, /ga of the cooling tube group /41. A condensate receiving plate /9 is provided to receive condensate water falling from ,/Hiro. As particularly shown in FIG. 5, this condensate receiving plate /9 is made of a rectangular plate material, and its long edges /9a and /9b are respectively connected to the condenser body body /2.
The long edge /qa is located directly above the opening /ga of the exhaust pipe /box of the water pump driving turbine. It's a trench.Weirs 20, , ) and 0 are erected on both short edges /9c and /9d of this condenser receiving plate /q to prevent the water on the plate from flowing out.

The hot well roof board 17 is provided with openings 2/, 2/, and 2/ to the hot well /A.
These openings 2/, 2/ and the condensate receiving plate/de are connected to water receiving guide troughs n, 2 consisting of slanted grooves with a U-shaped cross section, so that the water above the condensate receiving plate/d passes through the water receiving guide troughs U, U and reaches the openings 2/, , 2/.

In addition, when one condenser is used as in this embodiment, both condensers are connected to each other by the duct J, and the condenser receiving plate and the hotwell roof plate are connected by this duct. /7
The space formed between them is designed to communicate with each other.

In a condenser with such a configuration, exhaust gas from the main turbine flows downward from the upper opening, is condensed in the cooling pipe group, and then condensed from the cooling pipe group. The condensate falls and is received by the condensate receiving plate 15, and then passes through the condensate guide trough 9.2- to the hotwell roof plate 7.
opening 2/ , 2/ , its opening U/ , Ko/
From there, it flows into Hotwell/Otsu.

The exhaust air from the water supply pump driving turbine passes through the water supply pump driving turbine exhaust pipe /g and Ig, and is narrowed between the condensate receiving plate /9 in the water tank and the hotwell roof board /7. It flows into the space almost horizontally, diffuses, and the condenser receiving plate/q
It rises through the sides of the short edges /9c and /9d,
Similar to the main turbine exhaust, it is condensed in the cooling pipe group/Hiro and then received as condensate in the condensate receiving plate/wa, and the water receiving guide % 2.2, 22 and the opening of the hotwell roof plate/7 It flows into the hot well /A through parts 2/ and 2/.

In this way, the vertical condensate falling flow from the cooling pipe group/4' and the horizontal exhaust flow from the water supply pump driving turbine are separated by the condensate receiving plate, and the two flows flow without colliding with each other. .

Note that a part of the water supply pump driving turbine exhaust flow is
It flows into another condenser through duct/3 without rising inside the vessel, and is condensed to become condensate.

By using duct 3 to allow part of the turbine exhaust for driving the water supply pump to flow into the other condensers, the pressure in both condensers can be balanced, resulting in extremely good operation. You can get the status.

〔Effect of the invention〕

As described above, the present invention receives a falling flow of condensate from a group of cooling pipes through a condensate receiving plate disposed above an opening in a condenser of a turbine exhaust pipe for driving a drizzle pump, and The condensate on the 14iJ condensate receiving plate is introduced into the hot well through the water receiving guide trough provided to descend from the condensate receiving plate toward the hot well, and the condensate is introduced into the hot well from the cooling pipe group. Since the condensate falling vertical flow and the exhaust horizontal flow of the water supply pump driving turbine are separated by the condensate receiving plate, it is possible to prevent the two flows from colliding and interfering with each other. Prevents deterioration of the vacuum level due to erosion and gas generation of the condenser internal structures such as reinforcing pipes and the inner wall of the condenser body, which were caused by collisions and interference, and significantly improves the reliability and durability of the condenser. let me,
This has the great effect of ensuring very good operating conditions.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 and 2 are longitudinal and cross sectional views showing a conventional condenser, and FIGS. 3, 1, and 5 are views of a conventional condenser. They are a longitudinal sectional view, a transverse sectional view, and a partial perspective view of the water container. /l...Hotwell, /7...Hotwell roof board, 7g...Turbine exhaust pipe for driving water pump, /
ri...Condensate receiving plate, 2/...Opening, Ω...Water receiving guide trough, J...Duct. Applicant's agent Kiyonori Inomata 1 Figure 52 Figure 53 Figure 4 Flash

Claims (1)

[Claims] The exhaust pipe of the turbine for driving the water supply pump is connected to the main body body so as to open between the stations directly above the hot well provided at the lowest part of the vessel, and the exhaust pipe of the turbine for driving the water supply pump is connected to the exhaust pipe for driving the water supply pump. In a condenser of a thermal power plant, in which exhaust gas from a turbine is introduced into the vessel and condensed through a group of cooling pipes; A condensate receiving plate for receiving the water is provided at a position above the opening of the turbine exhaust pipe for driving the water supply pump, and a water receiving guide gutter for guiding the condensate on the condensate receiving plate through the hot well casing is provided above the condensate receiving plate. A condenser characterized in that a hook is installed so as to pass between the board and the hotwell roof board.