JP2016057050A - Steam condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser further improving the steam cooling performance of a multi-tube condenser using a conventional pipe or a U-shaped cooling water pipe.
SOLUTION: A steam descending flow guide plate 11 is disposed on a wall surface opposite to the steam downstream flow direction between the shelves of a cooling water flow pipe 7 in a container 1 of a conventional multi-tube condenser. The steam condenser is provided with a steam lowering shelf flow passage D that is offset and installed in a shelf shape.
[Selection] Figure 3

Description

  The present invention relates to a steam condenser that effectively cools steam fed into a container from a steam turbine, a cylinder, or the like with cooling water flowing through a plurality of cooling water pipes provided in the container. is there.

  A condenser is a device that cools steam extracted from a turbine, a cylinder, or the like to a reuse region temperature such as a turbine. There are many types of condensers such as a multi-tube type, a spiral type such as a coil type or a spiral pipe type, and a fin type depending on the arrangement structure of the cooling water pipes stored in the condensate container. For example, a multi-tube condenser in which a large number of cooling pipes are divided into several groups in a condensate vessel and arranged radially and a steam passage for guiding steam to the center of the tube group is provided between Since it flows while in contact with the cooling water pipe, it is said that the cooling effect is large and the condensation effect is high. In addition, a condenser with two cooling function bodies finished in a combined structure of radiant and dense parts in a cooling water tube group is housed in a condensate vessel. It is used for the vessel. However, such a condenser group with a cooling pipe group is manufactured in a complicated structure that holds a steam flow passage in a narrow gap of the cooling water pipe group, and the structure has troubled for some reason. There was a problem that could not be repaired easily.

  Because of these problems, the straight pipe condenser or the bent pipe condenser with a simple structure in which the cooling water pipe is processed into a U-shape is easy to manufacture and repair. Is generally used since. There are also many patent publications that use this type of condenser. For example, Japanese Patent Laid-Open No. 6-146810 discloses a condenser used in a “condensation apparatus having a deaeration device that removes dissolved oxygen from condensate and makeup water introduced into the condenser” It is a multi-tube condenser with an airtight holding structure in which a partition member is provided between an upper space that stores a tube bundle that condenses steam and a lower space that stores condensed condensate. Japanese Patent Laid-Open No. 7-260375 states that “a check valve is provided in a condensate inlet pipe of a ground steam condenser used in a thermal power / nuclear power plant, so that condensate heated by steam enters by natural convection. The condenser used in this apparatus is a U-shaped condenser from the drawings, and Japanese Patent Laid-Open No. 9-273875 is disclosed. “To provide a steam turbine condensing device for condensing steam discharged from a steam turbine, the condensing device is an upper and lower stage equipped with a large number of cooling water tubes in an axial exhaust condenser. The condenser is a multi-tube type.

Conventionally used condensers are, as introduced in the above-mentioned patent gazette, simple condensers that are easy to repair and have a straight pipe or U-shaped pipe installed in a container. In such a simple structure condenser, in order to quickly cool steam with a larger capacity and higher temperature, a large number of cooling water pipes can be installed in the container or the cooling water flowing through the cooling water pipes can be cooled. Many cooling effects, such as increasing the flow rate of water, lowering the temperature of cooling water normally used (average cooling water temperature of 20-24 ° C per year), or using cooling water pipes made of materials with excellent heat transfer performance Although improvement measures can be considered, the condenser used under high-temperature and high-pressure steam usage conditions has a limited cooling effect, and there are also problems with maintenance management and high production costs.
JP-A-6-146810 JP 7-260375 A JP-A-9-27387

  The present inventors have improved the steam cooling performance of a multi-tube condenser that uses the straight pipe or U-shape most frequently used today, and can be used as an auxiliary device for small power generation facilities for remote islands and remote areas. As a result of various studies for the purpose of developing a water vessel, by installing a steam flow path guide plate between the shelves of the cooling water circulation pipe in the container, the steam sent into the container is placed in the cooling container. It has been found that it flows so as to surround the peripheral surface of the cooling water distribution pipe installed on the pipe, and also flows while colliding with and touching the cooling water distribution pipe many times, so that even a small-capacity steam cooling vessel can be effectively cooled to a low temperature. .

  The present invention is configured based on this finding, and the gist of the present invention is that the partition chambers at both ends formed by separating and standing two partition wall plates in an openable sealed container are the cooling water circulation chambers. The compartment between them is a steam circulation chamber, and the cooling water circulation chambers at both ends are separated into one or both chambers, and a cooling water inlet is provided on the lower side and a cooling water outlet is provided on the upper side. Between the cooling water circulation chambers separated from each other, there is provided a cooling water rising flow passage in which one or a plurality of cooling water circulation pipes penetrating the vapor circulation chamber are installed in a shelf shape above the other steam circulation chamber. An exhaust steam inlet is provided on the side and a condensate outlet is provided on the lower side, and a guide plate for lowering the steam is provided between the shelves of the cooling water circulation pipe described above, which is shorter than the length between the opposing walls of the opposing sealed containers. Standing on the wall on the opposite side of the steam descending flow direction and erected in a shelf shape And a steam condenser which is constructed by providing a steam lowering tray flow passage.

すなわち、表１の実施結果から明らかな様に、本発明による復水器の出口温度は２８〜８９℃で、比較用復水器の６３〜１８３℃に比べてかなり低い。この様な温度差を起こる理由は、流される蒸気が蒸気流通用誘導板によって冷却水流通用パイプに確実に接触していると同時に接触時間が長くなって流動する原因にあると考えられる。また本発明は、冷却容器の容積の大きさを変える事なく、蒸気下流流通用誘導板の架設枚数を加減する事によって手洗用や浴槽用や医療用器具の消毒用など必要とする温度に調節する事ができる特長がある。The present invention has the effect of remarkably improving the steam condensation effect, that is, the heat exchange efficiency, only by installing a flat steam flow guide plate in the cooling water pipe shelf space of a conventionally used multi-tube condenser. Play. Table 1 shows a comparison of the steam temperature drop of the comparative condenser without the present invention in which the steam distribution guide plate is provided between the condenser water pipe shelves.

That is, as apparent from the results of Table 1, the outlet temperature of the condenser according to the present invention is 28 to 89 ° C, which is considerably lower than that of the comparative condenser 63 to 183 ° C. It is considered that the reason why such a temperature difference occurs is that the flowing steam surely contacts the cooling water distribution pipe by the steam distribution guide plate and at the same time, the contact time becomes long and flows. In addition, the present invention adjusts the temperature to the required temperature for hand washing, tub use, medical equipment disinfection, etc. by adjusting the number of installed steam downstream flow guide plates without changing the volume of the cooling container. There is a feature that can be done.

Hereinafter, the structure of the steam condenser of the present invention will be described in detail with reference to the drawings.
1 shows an embodiment of the present invention, FIG. 1 is a perspective view of a main body, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a sectional view taken along line YY of FIG. . 1 and 2, reference numeral 1 denotes an openable sealed container having a lid or a door (not shown) provided on an upper surface or a side surface. There are no particular limitations on the shape and material of the sealed container, and generally a sealed container having a rectangular cross-sectional shape is preferable, and it is also preferable to use a metallic material that is resistant to vapor erosion. Inside the sealed container 1, a partition chamber A on both ends formed by separating and standing two partition wall plates 2 is a cooling water circulation chamber 3 and a partition chamber B therebetween is a steam circulation chamber 4. The cooling water distribution chambers 3 at both ends are shifted to one or both chambers, and a cooling water inlet 5 is provided on the lower side and a cooling water outlet 6 is provided on the upper side. FIG. 2 shows an embodiment in which a cooling water inlet 5 and a cooling water outlet 6 are provided on one side of the cooling water circulation chamber 3. Further, between the cooling water circulation chambers 3 separated on both ends, a cooling water upward flow passage C is formed in which one or many cooling water circulation pipes 7 penetrating the steam circulation chamber 4 are installed in a shelf shape. . That is, the cooling water circulation chamber 3 flows directly through the cooling water circulation pipe 7 in which the cooling water flowing in from the cooling water inlet 5 on the lower side flows, and a part thereof does not flow through the cooling water circulation pipe 7. It is provided in a structure that flows out from the cooling water outlet 6 on the upper side while flowing. Further, in the present invention, the cooling water flowing in from the cooling water inlet 5 is forced to prevent the cooling water from flowing into the cooling water outlet 6 directly above the cooling water circulation chamber 3 without flowing through the cooling water circulation pipe 7. As shown, the cooling water flow baffle plate 8 may be provided at an arbitrary height position in the cooling water circulation chamber 3 as required.

  As shown in FIG. 3, the other steam circulation chamber 4 is provided with an exhaust steam inlet 9 on the upper side and a condensate outlet 10 on the lower side, and further the shelf of the above-described cooling water circulation pipe 7. Steam lowering shelf circulation in which a steam lowering flow guide plate 11 that is shorter than the length between opposite walls of the opposing sealed container is placed on the opposite wall to the steam lowering direction and installed in a shelf shape between the spaces. A path D is provided. In other words, the steam that holds the high-temperature heat that has flowed into the sealed container 1 is provided in such a structure that it is brought into contact with the cooling water circulation pipe 7 in a long time and quickly cooled. Further, the steam descending flow guide plate 11 may be installed horizontally, or may be installed at an arbitrary inclination angle in the direction of steam flow as shown in FIG. Further, the steam descending flow guide plate 11 is controlled at the both ends so as to control the flow velocity of the steam flowing in the sealed container 1 by adjusting the inclination angle so that the cooling temperature required at the condensate outlet 10 can be easily obtained. It may be installed on a seesaw structure that moves up and down. That is, the steam that has flowed into the sealed container 1 from the upper exhaust steam inlet 9 collides with the cooling water circulation pipe 7 while flowing on the steam descending circulation guide plate 11, and further rotates in the direction near the wall surface of the sealed container 1. The turbulent flow phenomenon is caused to flow out of the condensate outlet 10 through the long-distance steam lowering shelf flow passage D, and thus the cooling water flowing through the cooling water circulation pipe 7 is sufficiently cooled. Such operational effects can be clearly seen from the experimental results in Table 1 already described.

  Since the steam condenser of the present invention configured as described above is used in the same working method as a conventionally used condenser, it is used in all equipment that requires a condenser. It is a condenser.

  Since the steam condenser of the present invention has a simple structure and has a very high steam cooling effect despite its small size, it has the potential to be used as an accessory device for small power generation facilities for remote islands and remote areas. It is considered that there is a high possibility that a condenser having the same structure as that of the present invention will be used more and more in the future even in a large-scale equipment using a large condenser.

In one Example of this invention, the perspective view of a main-body part is shown with a shortening figure. The XX sectional view taken on the line of FIG. 1 is shown. FIG. 2 is a sectional view taken along line YY in FIG. 1.

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Ward wall board 3 Cooling water distribution chamber 4 Steam distribution chamber 5 Cooling water inlet 6 Cooling water outlet 7 Cooling water distribution pipe 8 Cooling water flow baffle plate 9 Exhaust steam inlet 10 Condensate outlet 11 Guidance for steam descending distribution Plate A Ward wall room B Compartment room C Cooling water upward flow path D Steam flow downward shelf flow path

Claims (1)

  The partition chamber (A) on both sides formed by separating and separating two partition wall plates (2) in the openable closed container (1) is a cooling water circulation chamber (3), and a partition chamber between them. (B) is used as a steam circulation chamber (4), and the cooling water circulation chamber (3) at both ends is separated into one or both chambers and cooled to the cooling water inlet (5) or to the upper side. Between the cooling water circulation chamber (3) provided with a water outlet (6) and spaced apart at both ends, one or many cooling water circulation pipes (7) penetrating the steam circulation chamber (4) are formed in a shelf shape. The cooling water rising flow passage (C) is provided on the other side, the exhaust steam inlet (9) is provided on the upper side of the other steam circulation chamber (4), and the condensate outlet (10) is provided on the lower side. Between the two shelves of the cooling water flow pipe (7), which is shorter than the length between the opposite walls of the opposite airtight container (11) Steam condenser, characterized in that constructed by the opposite side steam lowering tray flow path bridged performed on a biased wall to the shelf stepped to (D) provided with steam downward flow direction.

Images