JPH0835601A - Sludge-collecting device in vertical steam generator - Google Patents

Sludge-collecting device in vertical steam generator

Info

Publication number
JPH0835601A
JPH0835601A JP17267294A JP17267294A JPH0835601A JP H0835601 A JPH0835601 A JP H0835601A JP 17267294 A JP17267294 A JP 17267294A JP 17267294 A JP17267294 A JP 17267294A JP H0835601 A JPH0835601 A JP H0835601A
Authority
JP
Japan
Prior art keywords
sludge
steam
water
steam generator
separated water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP17267294A
Other languages
Japanese (ja)
Inventor
Hisato Watakabe
壽人 渡壁
Sunao Shiraishi
直 白石
Nobuo Nakamori
信夫 中森
Takanari Kusakabe
隆也 日下部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP17267294A priority Critical patent/JPH0835601A/en
Publication of JPH0835601A publication Critical patent/JPH0835601A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To achieve an invariably stabilized high efficiency in collecting the sludge in a vertical steam generator. CONSTITUTION:A sludge-collecting device 30 is provided in a vertical steam generator 20 which has a plurality of swirl type steam separators 23 placed above a region of feedwater boiling under heat and has also a moisture separator placed above the steam separators. Between steam separators 23 a sludge- collecting box 31 with an inflow port 33 in the middle of the upper side and an outflow port 35 in the upper side at the periphery is provided. With a directly-impinging-flow arrester 37 directly above, the inflow port receives the separated water from the moisture separator. In addition, the separated water B from the steam separators 23 falls on the upper side of the sludge-collecting box 31 and is in part taken into a perforated cylinder 39 of the directly- impinging-flow arrester.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、加圧水型原子炉プラン
ト等に用いられる堅型蒸気発生器の構造に関し、特にそ
の内部上方に設けられるスラッジ回収装置に関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rigid steam generator used in a pressurized water reactor plant or the like, and more particularly to a sludge recovery device provided above the inside thereof.

【0002】[0002]

【従来の技術】堅型蒸気発生器において、下部に設けら
れた伝熱管の中を高温流体が流れ、外側の給水を加熱
し、沸騰せしめる。このようにしてできた蒸気と水の2
相流は、上方の旋回羽根式気水分離器に流入し、遠心力
によって蒸気と水は分離され、分離水は落下して加熱領
域へ戻される。
2. Description of the Related Art In a rigid steam generator, a high-temperature fluid flows through a heat transfer tube provided at a lower portion of the steam generator to heat and feed water to the outside. 2 of steam and water made in this way
The phase flow flows into the upper swirl vane type water-water separator, centrifugal force separates steam and water, and the separated water falls and is returned to the heating region.

【0003】その気水分離器を出た蒸気は、未だ微細な
水滴を含んでいるので、更に上方に設けられたジグザグ
通路式の湿分分離器を通り、ここで水滴が分離される。
この分離水滴も集まって分離水となり、下方の加熱領域
に戻される。
Since the steam exiting the steam separator still contains fine water droplets, it passes through a zigzag passage type moisture separator provided further above, where the water droplets are separated.
These separated water droplets also collect and become separated water, which is returned to the lower heating region.

【0004】このような堅型蒸気発生器内において、ス
ラッジが蒸気発生器内に蓄積することを防止するため、
スラッジ回収装置が設けられている。その例を図2及び
図3を参照して説明すると、蒸気発生器10の上部胴1
1の中に3個の旋回羽根式気水分離器13が設けられて
いる。この形式の気水分離器13では、内筒13a内を
上昇した2相流が旋回羽根13bによって遠心力を与え
られ、外筒13cと内筒13aの間へ分離水が流入し、
流下する。スラッジ回収装置15は、気水分離器13の
間の下部に設けられ、その中央部上面に流入口15a、
外周部上面に流出口15bが形成されている。このスラ
ッジ回収装置15は、通常運転時、給水リングヘッダ1
7から供給される給水19の液面19a下にある。
In such a rigid steam generator, in order to prevent sludge from accumulating in the steam generator,
Sludge recovery equipment is provided. An example thereof will be described with reference to FIGS. 2 and 3. The upper body 1 of the steam generator 10
Three swirl vane type water-water separators 13 are provided in one. In this type of steam-water separator 13, the two-phase flow that has risen in the inner cylinder 13a is given a centrifugal force by the swirl vanes 13b, and the separated water flows between the outer cylinder 13c and the inner cylinder 13a.
Run down. The sludge recovery device 15 is provided in the lower part between the steam separators 13, and has an inlet port 15a on the upper surface of the central part thereof.
An outlet 15b is formed on the upper surface of the outer peripheral portion. This sludge recovery device 15 is used for the water supply ring header 1 during normal operation.
It is below the liquid surface 19a of the water supply 19 supplied from 7.

【0005】そして、更に上方にある湿分分離器(図示
しない)から中央管18を通って落ちる2次分離水aの
一部が、流入口15aからスラッジ回収装置13の中に
流入し、流出口15bから流出する。この間、伴流スラ
ッジが沈降分離され、スラッジ回収装置15の中に捕集
される。他方、前述の気水分離器13からの分離水すな
わち1次分離水bは、スラッジ回収装置15の上面に向
かって流下した後、これに沿って上部胴11の方に流
れ、流水リングヘッダ17からの給水と合流し、下方の
加熱部へ向かって流れる。スラッジ回収装置15に流入
しなかった2次分離水aも、その上面に沿って流れる。
Then, a part of the secondary separated water a, which drops from a moisture separator (not shown) located further above through the central pipe 18, flows into the sludge recovery device 13 from the inflow port 15a and flows. It flows out from the outlet 15b. During this time, the wake sludge is separated by sedimentation and collected in the sludge recovery device 15. On the other hand, the separated water from the steam separator 13, that is, the primary separated water b, flows down toward the upper surface of the sludge recovery device 15, and then flows toward the upper cylinder 11 along the sludge recovery device 15, and the running water ring header 17 It joins with the water supply from and flows toward the heating part below. The secondary separated water a that did not flow into the sludge recovery device 15 also flows along the upper surface thereof.

【0006】[0006]

【発明が解決しようとする課題】以上説明した従来のス
ラッジ回収装置においては、重力落下する2次分離水を
流入口に直射させ、その一部を装置内部に導いて通過さ
せ、スラッジを捕集するものであるが、蒸気発生器の運
転状況によっては、2次分離水の流量が大きく増減す
る。
In the conventional sludge recovery device described above, the secondary separated water that falls by gravity is directly exposed to the inflow port, and a part of it is guided to the inside of the device to pass therethrough to collect the sludge. However, the flow rate of the secondary separated water greatly increases or decreases depending on the operating conditions of the steam generator.

【0007】一方、発明者の知見によれば、回収装置内
のスラッジ沈降分離特性は、水の通過流速に大きく依存
し、適正な流速値を外れると性能が大きく低下する。し
かしながら、蒸気発生器において2次分離水の流量が大
きく増減しやすいので、常に十分なスラッジ回収性能を
得ることができなかった。
On the other hand, according to the knowledge of the inventor, the sludge settling separation characteristic in the recovery device largely depends on the flow velocity of water passing therethrough, and if it deviates from an appropriate flow velocity value, the performance is greatly reduced. However, since the flow rate of the secondary separated water in the steam generator is likely to change greatly, it was not always possible to obtain sufficient sludge recovery performance.

【0008】したがって、本発明は、堅型蒸気発生器に
おいて常に安定して高い回収性能が得られるスラッジ回
収装置を提供することを目的としてなされたものであ
る。
[0008] Therefore, the present invention has been made for the purpose of providing a sludge recovery device which can always obtain a high recovery performance in a rigid steam generator.

【0009】[0009]

【課題を解決するための手段】叙上の目的の下に、本発
明によれば、給水の加熱沸騰領域の上方に設けられた複
数の旋回式気水分離器及びその気水分離器の上方に設け
られた湿分分離器を有する堅型蒸気発生器に設けられる
スラッジ回収装置は、次のように構成される。すなわ
ち、気水分離器相互の間に、スラッジ捕集箱が設けら
れ、その中央部上面に流入口が、外周部上面に流出口が
夫々設けられる。そして、その流入口の直上部に直射流
防止器が設置され、湿分分離器からの分離水を受けるよ
うに構成され、更に気水分離器からの分離水が、スラッ
ジ捕集箱の上面に落下し、直射流防止器の多孔円筒が、
その分離水の一部を受け入れるように構成される。
For the purposes of the above, according to the invention, a plurality of swirl-type steam-water separators provided above the heating and boiling area of the feed water and above the steam-water separators are provided. The sludge recovery device provided in the rigid steam generator having the moisture separator provided in is configured as follows. That is, the sludge collection box is provided between the steam separators, and the inlet is provided on the upper surface of the central portion and the outlet is provided on the upper surface of the outer peripheral portion. Then, a direct flow preventer is installed directly above the inflow port, is configured to receive the separated water from the moisture separator, and the separated water from the steam separator is on the upper surface of the sludge collection box. If it falls, the perforated cylinder of the direct flow preventer
It is configured to accept a portion of its separated water.

【0010】[0010]

【作用】前記した構成において、気水分離器から落下し
た分離水(一次)は、スラッジ捕集箱の上面で外周方向
流と中心方向流に2分されて水平に流れる。中心方向流
は、直射流防止器の多孔円筒に当たってせき止められ、
水頭を増す。一方、外周方向流は、流出口の上を流れ、
動圧分のみ捕集箱内圧力を低下させる。即ち、捕集箱の
中で、流入口近傍と流出口近傍との間に圧力差が生じ、
これにより流入口から流出口に向かう流れが生じる。換
言すれば、気水分離器から落下して生じた中心方向流の
一部が流入口を経てスラッジ捕集箱に入り、そこを流れ
つつ、スラッジを落とす。そして、流出口から流れ出て
加熱沸騰領域へ環流する。
In the above structure, the separated water (primary) dropped from the steam separator is divided into an outer peripheral direction flow and a central direction flow on the upper surface of the sludge collection box and flows horizontally. The central flow hits the perforated cylinder of the direct flow preventer and is stopped,
Increase head. On the other hand, the flow in the outer peripheral direction flows over the outlet,
The pressure inside the collection box is reduced only by the dynamic pressure. That is, in the collection box, a pressure difference occurs between the vicinity of the inlet and the vicinity of the outlet,
This causes a flow from the inlet to the outlet. In other words, a part of the central flow generated by falling from the steam separator enters the sludge collection box through the inflow port and flows there, dropping sludge. Then, it flows out from the outlet and recirculates to the heating / boiling region.

【0011】[0011]

【実施例】以下、添付の図面を参照して本発明の実施例
を説明する。図1において、蒸気発生器20の上部胴2
1の中には、旋回式の気水分離器23が等円周間隔で3
個設けられている。勿論気水分離器23は、蒸気発生器
20の大きさ等に応じて2個にしてもよいし、又、4個
以上の適当な数にしてもよい。このような気水分離器2
3の配置は、前述の従来構造のものと同等であり、図2
を参照すれば、よく理解できよう。これから容易に想像
できるように、気水分離器23の上方には、図示しない
湿分分離器(2次分離器)が設けられており、この湿分
分離器からの分離水(2次分離水)を流す中央管28が
設けられている。
Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, the upper body 2 of the steam generator 20
In 1, the swirl type water-water separator 23 has three equal circumferential intervals.
It is provided individually. Of course, the steam separator 23 may be two in number depending on the size of the steam generator 20, or may be an appropriate number of four or more. Such a steam separator 2
The arrangement of 3 is the same as that of the above-mentioned conventional structure, and FIG.
See for a better understanding. As can be easily imagined from this, a moisture separator (secondary separator) (not shown) is provided above the steam separator 23, and the separated water (secondary separated water) from this moisture separator is provided. A central tube 28 through which a) flows.

【0012】このような構造の蒸気発生器20におい
て、給水リングヘッダ27から流入した低温の給水29
は、上部胴21の内面に沿って流下し、更に図示しない
下部胴の内面に沿って流下して、加熱沸騰領域に入る。
その加熱沸騰領域を上昇する間に、加熱され、沸騰して
蒸気と水の2相流となる。
In the steam generator 20 having such a structure, the low temperature feed water 29 flowing in from the feed water ring header 27.
Flows down along the inner surface of the upper cylinder 21, further flows down along the inner surface of the lower cylinder (not shown), and enters the heating / boiling region.
While rising in the heating boiling region, it is heated and boils into a two-phase flow of steam and water.

【0013】この蒸気と水の2相流は、気水分離器23
の内筒23aの中を上昇し、旋回羽根23bによって旋
回流となる。水は、遠心力によって内筒23aの内面に
押しつけられ、分離水となって内筒23aと外筒23c
の間の環状流路に入り、流下する。矢印Bは、このよう
な分離水(一次分離水)の流れを示している。一方、比
重量の小さい蒸気は、気水分離器23の上部開口23d
を通って上昇し、図示しない湿分分離器に入って、乾燥
蒸気と水滴等に分離される。分離された水滴等は、(二
次)分離水Aとなって、中央管28内を流下する。
The two-phase flow of steam and water is the steam separator 23.
It rises in the inner cylinder 23a and becomes a swirl flow by the swirl vanes 23b. The water is pressed against the inner surface of the inner cylinder 23a by centrifugal force to become separated water, and the inner cylinder 23a and the outer cylinder 23c are separated.
It enters the annular flow path between and flows down. Arrow B indicates the flow of such separated water (primary separated water). On the other hand, the steam with a small specific weight is used for the upper opening 23d of the steam separator 23d.
Through the moisture separator (not shown) to be separated into dry steam and water droplets. The separated water drops and the like become (secondary) separated water A and flow down in the central pipe 28.

【0014】このような一次分離水B、二次分離水Aか
らスラッジを回収するスラッジ回収装置30は、次のよ
うに構成されている。即ち、前述の従来のものと同様な
外形形状をもつ捕集箱本体31は、気水分離器23の内
筒23aの間に設けられている。そして、その上面に
は、中心部に比較的大きい径の流入口33が穿設され、
又、外周部には、比較的小さい径の流出口35が複数穿
設されている。捕集箱31の平面形状は前述の従来のも
のと同じであるから、流出口35は、3つの外周端部に
夫々設けられている。
The sludge recovery device 30 for recovering sludge from the primary separated water B and the secondary separated water A is constructed as follows. That is, the collection box body 31 having an outer shape similar to that of the conventional one described above is provided between the inner cylinders 23 a of the steam separator 23. Then, on its upper surface, an inflow port 33 having a relatively large diameter is bored in the central portion,
In addition, a plurality of outlets 35 having a relatively small diameter are formed in the outer peripheral portion. Since the planar shape of the collection box 31 is the same as the conventional one described above, the outflow ports 35 are provided at the three outer peripheral ends, respectively.

【0015】更に、捕集箱31の流入口33の上方に、
直射流防止器37が設けられている。直射流防止器37
は、概して筒形であり、下部に多孔円筒39を備え、そ
の上方に直射流防止板41を備えている。
Further, above the inflow port 33 of the collection box 31,
A direct flow preventer 37 is provided. Direct flow preventer 37
Is generally cylindrical, has a perforated cylinder 39 in the lower part, and has a direct flow prevention plate 41 above it.

【0016】以上のような構成のスラッジ回収装置30
の作用について説明するに、中央管28内を流下した二
次分離水Aは、直射流防止板41に当たり、直射流防止
器37の外に溢れ出して、多孔円筒39のまわりに落下
する。更に、気水分離器23から落下した一次分離水B
の一部は、中心方向へ向かい、多孔円筒39に接近し、
前述の二次分離水Aと合流してこの部分の水頭を増す。
一方、一次分離水Bの残りは、スラッジ捕集箱31の上
面を外周方向へ向って流れ、流出口35の上を流れ、吸
出し作用を生ずる。このようにして、スラッジ捕集箱3
1の中に、流入口33から流出口35へ向う流れCを生
じ、この流速は小さいから伴流していたスラッジが沈降
して分離され、捕集される。
The sludge recovery device 30 having the above structure
The secondary separated water A flowing down in the central pipe 28 hits the direct flow prevention plate 41, overflows to the outside of the direct flow prevention device 37, and falls around the perforated cylinder 39. Further, the primary separated water B dropped from the steam separator 23
A part of the heading toward the center and approaching the perforated cylinder 39,
It merges with the above-mentioned secondary separated water A to increase the head of this portion.
On the other hand, the rest of the primary separated water B flows in the outer peripheral direction on the upper surface of the sludge collection box 31, flows over the outflow port 35, and causes a suction action. In this way, the sludge collection box 3
A flow C flowing from the inflow port 33 to the outflow port 35 is generated in the No. 1, and since the flow velocity is small, the sludge that was accompanying the flow settles, is separated, and is collected.

【0017】[0017]

【発明の効果】以上、説明したように、本発明によれ
ば、湿分分離器からの二次分離水は、直射流防止器によ
って受けられ、気水分離器からスラッジ捕集箱の上に落
下する一次分離水の分流と、直射流防止器の多孔円筒と
の協働作用により、スラッジ捕集箱を貫く流れが生じ、
スラッジが回収される。そして、この気水分離器からの
一次分離水の流量は、蒸気発生器の運転中、安定してい
るので、スラッジ捕集箱を貫流する流れも安定して、常
に高効率のスラッジ回収を行うことができる。
As described above, according to the present invention, the secondary separated water from the moisture separator is received by the direct flow preventer, and the secondary separated water is discharged from the steam separator onto the sludge collection box. The flow of the primary separation water that falls and the perforated cylinder of the direct flow preventer cooperate to generate a flow through the sludge collection box.
Sludge is collected. Since the flow rate of the primary separated water from this steam separator is stable during the operation of the steam generator, the flow through the sludge collection box is also stable and sludge recovery is always performed with high efficiency. be able to.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の実施例を示す要部立断面図である。FIG. 1 is a vertical sectional view of an essential part showing an embodiment of the present invention.

【図2】 従来装置の平断面図である。FIG. 2 is a plan sectional view of a conventional device.

【図3】 従来装置の立断面図である。FIG. 3 is a vertical cross-sectional view of a conventional device.

【符号の説明】[Explanation of symbols]

20…蒸気発生器、23…気水分離器、30…スラッジ
回収装置、31…スラッジ捕集箱、33…流入口、35
…流出口、37…直射流防止器、39…多孔円筒、41
…直射流防止板、A…二次分離水、B…一次分離水。
20 ... Steam generator, 23 ... Steam separator, 30 ... Sludge recovery device, 31 ... Sludge collection box, 33 ... Inflow port, 35
... Outlet port, 37 ... Direct flow preventer, 39 ... Perforated cylinder, 41
... direct flow prevention plate, A ... secondary separated water, B ... primary separated water.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 日下部 隆也 兵庫県神戸市兵庫区和田崎町一丁目1番1 号 三菱重工業株式会社神戸造船所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takaya Kusakabe 1-1-1 Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries Ltd. Kobe Shipyard

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 給水の加熱沸騰領域の上方に設けられた
複数の旋回式気水分離器及び同気水分離器の上方に設け
られた湿分分離器を有する堅型蒸気発生器において、上
面に流入口と流出口とが離れて形成されたスラッジ捕集
箱が前記気水分離器にはさまれて設けられ、前記気水分
離器の分離水が前記スラッジ捕集箱の上面上に落下して
流れるように構成され、多孔円筒を備えた直射流防止器
が前記流入口の直上に設けられて前記湿分分離器からの
分離水がその直射流防止器上に落下するように構成され
ていることを特徴とする堅型蒸気発生器のスラッジ回収
装置。
1. A rigid steam generator having a plurality of swirl type steam-water separators provided above a heating and boiling region of feed water and a moisture separator provided above the steam-water separators. A sludge collection box having an inflow port and an outflow port separated from each other is provided so as to be sandwiched by the steam separator, and the separated water of the steam separator falls on the upper surface of the sludge collection box. And a direct flow preventer having a perforated cylinder is provided directly above the inflow port so that the separated water from the moisture separator falls on the direct flow preventer. A sludge recovery device for a rigid steam generator, which is characterized in that
JP17267294A 1994-07-25 1994-07-25 Sludge-collecting device in vertical steam generator Withdrawn JPH0835601A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17267294A JPH0835601A (en) 1994-07-25 1994-07-25 Sludge-collecting device in vertical steam generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17267294A JPH0835601A (en) 1994-07-25 1994-07-25 Sludge-collecting device in vertical steam generator

Publications (1)

Publication Number Publication Date
JPH0835601A true JPH0835601A (en) 1996-02-06

Family

ID=15946236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17267294A Withdrawn JPH0835601A (en) 1994-07-25 1994-07-25 Sludge-collecting device in vertical steam generator

Country Status (1)

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