JPH0395301A - Deaerator device having control device for steam pressure and water level in emergency - Google Patents

Deaerator device having control device for steam pressure and water level in emergency

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Publication number
JPH0395301A
JPH0395301A JP23155789A JP23155789A JPH0395301A JP H0395301 A JPH0395301 A JP H0395301A JP 23155789 A JP23155789 A JP 23155789A JP 23155789 A JP23155789 A JP 23155789A JP H0395301 A JPH0395301 A JP H0395301A
Authority
JP
Japan
Prior art keywords
water level
pressure
normal
steam
deaerator
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.)
Pending
Application number
JP23155789A
Other languages
Japanese (ja)
Inventor
Junichi Ito
純一 伊藤
Akio Yoneyama
明男 米山
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP23155789A priority Critical patent/JPH0395301A/en
Publication of JPH0395301A publication Critical patent/JPH0395301A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To suppress a useless discharging of steam at the time of adjustment of pressure and water level by a method wherein an emergency adjusting valve is also applied as a shared adjusting valve, a piping around a deaeration device is reduced, the number of component parts is decreased and an outlet port of the shared adjusting valve is arranged at a position higher than a level of normal water and lower than an abnormal water level. CONSTITUTION:When a steam pressure reaches a dangerous pressure value, a shared adjusting valve 3 is opened in response to a control signal from a steam control means 9. When an internal pressure is decreased to a normal pressure, the shared adjusting valve 3 is closed and then the steam pressure is kept at a normal pressure under a normal control. Since an outlet port 15 is arranged at a position higher than a normal water level, a level of supplying water is not lowered than the normal water level, but a normal operation of the deaeration device 1 can be carried out just after a steam pressure is decreased to a normal pressure. When the water level reaches the dangerous water level, the shared adjusting valve 3 is opened in response to a control signal from a water supplying control means 11. When a supplying water level is decreased to reach the abnormal water level, the shared adjusting valve 3 is closed. Since an outlet port 15 is arranged at a position lower than the dangerous water level and the abnormal water level, only the supplied water is discharged and the steam is not discharged unnecessarily.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、緊急時に蒸気圧並びに水位を制御する装置を
備えた脱気器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deaerator equipped with a device for controlling steam pressure and water level in an emergency.

[従来の技術] 従来、ボイラ給水中の溶存ガスによるボイラヘの影響、
例えば溶存酸素による腐食等の防止するために、ボイラ
給水ポンプの吸込側等に鋭気器を設けている. 第3図に従来の脱気器の一例を示す。この脱気器には、
高圧力の蒸気を送り込み、内部圧力を所定値に維持する
ための蒸気流入調整弁305と、ボンブの吸込に伴い内
部の水位を通常使用状態の通常水位(N.W.L)に維
持する給水流入調整弁307とが設けられており、それ
ぞれ独自に制御されている. ところで、これら調整弁30.5,307や制御系30
9,311等が不調の場合に、内部圧力や水位が上昇し
すぎると装置自体の故障やときには破損等も生じるため
、このような緊急時の危険回避を行う手段が必要となる
. ここで、圧力については安全弁(図示せず)が設けられ
ているが、その作動時の騒音等を考慮すると、これを作
動させることは好ましくない.また、給水については脱
気器の排水弁を開くことも考えられるが、一旦排水する
と通常水位に復帰させ、又蒸気圧力を維持する迄に時間
がかかりその後の作業の工程に問題が多い。
[Conventional technology] Conventionally, the effects of dissolved gas in boiler feed water on boilers,
For example, to prevent corrosion caused by dissolved oxygen, a sharp air device is installed on the suction side of the boiler feed pump. FIG. 3 shows an example of a conventional deaerator. This deaerator has
A steam inflow regulating valve 305 that feeds high-pressure steam and maintains the internal pressure at a predetermined value, and a water supply that maintains the internal water level at the normal water level (N.W.L) in normal use as the bomb suctions. An inflow regulating valve 307 is provided, each of which is independently controlled. By the way, these regulating valves 30.5, 307 and control system 30
If 9,311, etc. are malfunctioning, if the internal pressure or water level rises too much, the equipment itself may malfunction or even be damaged, so a means to avoid danger in such an emergency is required. Here, a safety valve (not shown) is provided for pressure, but considering the noise caused when it is activated, it is not desirable to activate it. Regarding the water supply, opening the drain valve of the deaerator may be considered, but once the water is drained, it takes time to return to the normal water level and maintain the steam pressure, which causes many problems in the subsequent work process.

このため、従来の脱気器には蒸気および給水の夫々につ
いて緊急時の逃がし弁302,304が設けられている
. [発明が解決しようとする課!!I] このような従来の脱気器には、上記のように蒸気及び給
水の夫々について、常用並びに緊急用の調整弁並び心逃
がし弁が各々設けられており、これらの弁の操作並びに
制御動作が複雑となる問題があった. さらに、これらの各々の弁のために脱気器周りの配管等
が複雑となり、部品点数もふえるため製造コストがかさ
む問題もあった。
For this reason, conventional deaerators are provided with emergency relief valves 302 and 304 for steam and water supply, respectively. [The problem that the invention tries to solve! ! I] As mentioned above, such conventional deaerators are provided with regulating valves and heart relief valves for regular use and emergency use, respectively, for steam and water supply, and the operation and control operations of these valves are There was a problem that made it complicated. Furthermore, each of these valves complicates the piping around the deaerator and increases the number of parts, resulting in an increase in manufacturing costs.

[課題を解決するための手段] 上記の問題を解決するために本発明に係る蒸気圧並びに
水位制御装置を備えた脱気器では、蒸気流入調整弁と、
給水流入調整弁とを有し、所定の蒸気圧並びに所定の水
位の状態で給水中の溶存ガスを脱気する脱気器において
、脱気器内部の通常水位より高く異常水位より低い位置
に取り出し口を備え、緊急時に脱気器内部の水位若しく
は蒸気圧力を減少させるための共用調整弁を有し、脱気
器内部の水位が、異常水位より高い危険水位に達した場
合に前記共用調整弁を開き、異常水位に下がった場合に
前記共用調整弁を閉じる緊急水位制御手段と、脱気器内
部の蒸気圧が危険圧力に達した場合に前記共用調整弁を
開き、通常圧力に戻った場合に前記共用調整弁を閉じる
緊急圧力制御手段とを有することを特徴とする。
[Means for Solving the Problems] In order to solve the above problems, a deaerator equipped with a steam pressure and water level control device according to the present invention includes a steam inflow regulating valve,
In a deaerator that has a feed water inflow regulating valve and deaerates dissolved gas in the feed water at a predetermined steam pressure and a predetermined water level, the deaerator is taken out at a position higher than the normal water level and lower than the abnormal water level inside the deaerator. and a common regulating valve for reducing the water level or steam pressure inside the deaerator in an emergency, and when the water level inside the deaerator reaches a dangerous water level higher than the abnormal water level, the common regulating valve an emergency water level control means that opens the common regulating valve and closes the common regulating valve when the water level drops to an abnormal water level, and opens the common regulating valve when the steam pressure inside the deaerator reaches a dangerous pressure and returns to normal pressure. and emergency pressure control means for closing the common regulating valve.

[作用] 本発明に係る鋭気器は、上記のように構成されているた
め、脱気器内部の水位が危険水位に達した場合.並びに
脱気器内部の蒸気圧が危険圧力に達した場合に共用調整
弁が開かれ、給水若しくは蒸気が脱気器外部に逃がされ
て水位若しくは圧力が低下する. そして、脱気器内部の水位が異常水位に下がった場合,
並びに脱気器内部の蒸気圧が通常圧力に戻った場合には
共用調整弁が閉じられ、通常使用状態に復帰する。
[Function] Since the deaerator according to the present invention is configured as described above, when the water level inside the deaerator reaches a dangerous water level. In addition, when the steam pressure inside the deaerator reaches a dangerous pressure, the common regulating valve is opened, and the water or steam is released to the outside of the deaerator, reducing the water level or pressure. If the water level inside the deaerator drops to an abnormal level,
Furthermore, when the steam pressure inside the deaerator returns to normal pressure, the common regulating valve is closed and the normal operating state is restored.

ここで、通常使用状態とは、蒸気圧であれば脱気器の使
用設定温度における所定の蒸気圧、例えば溶存酸素の脱
気を容易ならしめる酸素分圧となる蒸気圧(通常圧力)
をいい、給水の水位であれば安全に使用できる一般使用
状態における設定水位(通常水位)をいう. ところで、脱気器では給水の水位が通常水位より高い水
位の状態であっても充分に鋭気することが可能であり、
そのまま使用しても装置に危険の伴わない水位(異常水
位)がある。また、この異常水位より高いある水位に達
すると装置の作動に危険が伴う事がある水位(危険水位
)がある。
Here, the normal usage state refers to the steam pressure at the predetermined steam pressure at the set operating temperature of the deaerator, for example, the steam pressure (normal pressure) at which the oxygen partial pressure makes it easy to degas the dissolved oxygen.
This refers to the set water level (normal water level) under conditions of general use that can be used safely if it is the water level of the water supply. By the way, with a deaerator, even if the water level of the feed water is higher than the normal water level, it is possible to sufficiently aerate the water.
There is a water level (abnormal water level) that does not pose any danger to the equipment even if it is used as is. Additionally, there is a water level (dangerous water level) that, if it reaches a certain water level higher than this abnormal water level, may pose a danger to the operation of the device.

このため、脱気器内部の給水の水位が危険水位に達する
と共用調整弁が開かれ、異常水位より低い位置にある調
整弁の取り出し口からは給水のみが排出され、この水位
が異常水位に下がった状態で共用調整弁が閉じられるた
め、前記取り出し口からは不必要な蒸気が逃げることは
ない。
Therefore, when the water level inside the deaerator reaches a dangerous level, the common regulating valve is opened, and only the supplied water is discharged from the outlet of the regulating valve located at a position lower than the abnormal water level. Since the common regulating valve is closed in the lowered state, unnecessary steam will not escape from the outlet.

一方、装置の作動に危険が伴う事がある蒸気圧を危険圧
力という。脱気器内部の蒸気圧が危険圧力に達すると、
やはり共用調整弁が開かれて、通常水位の状態では蒸気
のみが排出される。
On the other hand, vapor pressure that can pose a danger to the operation of equipment is called dangerous pressure. When the vapor pressure inside the deaerator reaches a dangerous pressure,
Again, the common regulating valve is opened and only steam is discharged under normal water level conditions.

ここで、水位が通常水位より高い場合には、蒸気ととも
に給水も一部排出されるが、取り出し口が通常水位より
高い位置にあるため、水位が通常水位を下回ることは無
い。
Here, if the water level is higher than the normal water level, a portion of the supplied water is discharged together with the steam, but since the outlet is located at a higher position than the normal water level, the water level will not fall below the normal water level.

そして、蒸気圧が通常圧力に戻った状態で共用調整弁が
閉じられると、脱気器は通常使用状態に復帰しすぐに装
置を可動できる。
Then, when the common regulating valve is closed with the steam pressure returning to normal pressure, the deaerator returns to its normal operating state and the device can be operated immediately.

[実施例] 本発明の実施例を図面を参照して説明する。[Example] Embodiments of the present invention will be described with reference to the drawings.

第1図に本発明の一実施例を示す。この図において、1
は蒸気流入調整弁5と給水流入調整弁7とを備えた脱気
器である。この脱気器1には、通常水位(N.W.L)
より高く、異常水位(H.A.L)より低い位置に取り
出し口を有する共用調整弁3が設けられている。
FIG. 1 shows an embodiment of the present invention. In this figure, 1
is a deaerator equipped with a steam inflow regulating valve 5 and a feed water inflow regulating valve 7. This deaerator 1 has a normal water level (N.W.L).
A common regulating valve 3 is provided which has an outlet at a position higher than the abnormal water level (H.A.L) and lower than the abnormal water level (H.A.L).

蒸気流入調整弁5は、圧力検出千段13により測定され
た脱気器内部の蒸気の圧力が通常圧力に保たれるように
蒸気制御千段9により流入量の制御(弁の開閉)が行わ
れる。また、給水流入調整弁7は、水位検出手段14に
より測定された脱気器内部の給水の水位が通常水位(N
.W.L)に保たれるように給水制御手段1lにより流
入量の制御が行われる。
The steam inflow regulating valve 5 has an inflow amount controlled (opening/closing the valve) by a steam control stage 9 so that the steam pressure inside the deaerator measured by a pressure detection stage 13 is maintained at a normal pressure. be exposed. The feed water inflow regulating valve 7 also detects that the water level of the feed water inside the deaerator measured by the water level detection means 14 is the normal water level (N
.. W. The inflow amount is controlled by the water supply control means 1l so that it is maintained at L).

この脱気器1の通常作動時には、蒸気及び給水が通常圧
力並びに通常水位(N.W.L)に保たれた状態で給水
の脱気が行われ、脱気された給水がボイラヘ送られる。
During normal operation of the deaerator 1, the feed water is degassed while the steam and feed water are maintained at normal pressure and normal water level (N.W.L), and the degassed feed water is sent to the boiler.

次に、この脱気器1の緊急時における蒸気圧及び水位の
制御を説明する。
Next, control of the steam pressure and water level of this deaerator 1 in an emergency will be explained.

蒸気流入調整弁5の不調等により内部圧力が上昇し、圧
力検知手段13により検知した蒸気圧が危険圧力に達す
ると、蒸気制御千段9からの制御信号に基き共用調整弁
3が開かれる。さらに、内部圧力が通常圧力に下がると
蒸気制御千段9からの制御信号に基き共用調整弁3が閉
じられ、前記の通常制御により通常圧力に維持される。
When the internal pressure increases due to a malfunction of the steam inflow regulating valve 5 and the steam pressure detected by the pressure detection means 13 reaches a dangerous pressure, the common regulating valve 3 is opened based on a control signal from the steam control stage 9. Furthermore, when the internal pressure falls to the normal pressure, the common regulating valve 3 is closed based on a control signal from the steam control stage 9, and the normal pressure is maintained by the above-mentioned normal control.

このとき、給水の水位が通常水位(N.W.L〉であれ
ば蒸気のみが排出されるが、通常水位より高く、取り出
し口15付近若しくはそれ以上の水位の状態である場合
には、蒸気とともに給水の一部も排出される。しかし、
取り出し口l5が通常水位より高い位置に設けられてい
るため、給水の水位が通常水位を下回る事はなく、蒸気
圧が通常圧力に下がった後、すぐに脱気器1の通常作動
が可能である。
At this time, if the water level of the supply water is at the normal water level (N.W.L), only steam will be discharged, but if the water level is higher than the normal water level and near or above the outlet 15, steam will be discharged. At the same time, some of the water supply is also discharged.However,
Since the outlet 15 is provided at a position higher than the normal water level, the water level of the feed water does not fall below the normal water level, and normal operation of the deaerator 1 is possible immediately after the steam pressure drops to the normal pressure. be.

一方、給水調整弁7等の不調により、給水の水位が上昇
する場合がある。
On the other hand, due to malfunction of the water supply regulating valve 7 or the like, the water level of the water supply may rise.

この場合、水位検知千段14により検知した給水の水位
が取り出し口15を越え異常水位( H .A.L)に
達しても脱気器1は安全に通常作動するので、共用調整
弁3の制御は行われない.しかし、危険水位(H.H.
A.L)に達した場合には、給水制御手段11からの制
御信号に基き共用調整弁3が開かれる。そして、給水の
水位が下がり異常水位(H.A.L)に達すると、給水
制御千段11からの制御信号に基き共用調整弁3が閉じ
られる。
In this case, even if the water level of the feed water detected by the water level detection stage 14 exceeds the outlet 15 and reaches the abnormal water level (H.A.L.), the deaerator 1 will operate safely and normally, so the common regulating valve 3 There is no control. However, the dangerous water level (H.H.
A. L), the common regulating valve 3 is opened based on a control signal from the water supply control means 11. Then, when the water level of the water supply falls and reaches an abnormal water level (H.A.L), the common regulating valve 3 is closed based on a control signal from the water supply control stage 11.

ここで、取り出し口15は、危険水位及び異常水位より
低い位置に設けられているため、給水のみが排出され、
蒸気が不必要に排出されることはない。
Here, since the outlet 15 is provided at a position lower than the dangerous water level and the abnormal water level, only the supplied water is discharged.
Steam is not discharged unnecessarily.

ところで、蒸気圧並びに水位が共に危険圧力.危険水位
に達した場合には、やはり共用調整弁3が開かれるが、
水位が異常水位(H.A.L)に達した状態で、蒸気圧
が未だ通常圧力状態に下がっていない場合には、蒸気圧
が通常圧力に下がるまで共用調整弁3は閉じられずに開
かれたままである。
By the way, both steam pressure and water level are dangerous pressures. If the dangerous water level is reached, the common regulating valve 3 is also opened, but
If the water level has reached the abnormal water level (H.A.L) and the steam pressure has not yet fallen to the normal pressure state, the common regulating valve 3 will not be closed and will remain open until the steam pressure has fallen to the normal pressure. It remains dry.

これは、脱気器1の通常使用状態にいちはやく復帰させ
るためであり、この場合にも取り出し口15が通常水位
よりも高い位置に設けられていることから、給水の水位
が通常水位を下回ることはない. 逆に、水位が異常水位(H.A..L)に達する前に、
蒸気圧が通常圧力に下がった場合にも、共用調整弁3は
閉じられずに開かれたままである。
This is to quickly return the deaerator 1 to the normal operating state, and in this case as well, since the outlet 15 is provided at a position higher than the normal water level, the water level of the supplied water will not fall below the normal water level. No. Conversely, before the water level reaches the abnormal water level (H.A..L.),
Even when the steam pressure drops to normal pressure, the common regulating valve 3 remains open without being closed.

この場合にも、蒸気は取り出し口15から排出されない
ので、蒸気制御千段9の通常制御により蒸気流入調整弁
5から蒸気が流入し、蒸気圧が通常圧力に維持される。
In this case as well, since steam is not discharged from the outlet 15, steam flows in from the steam inflow regulating valve 5 under the normal control of the steam control stage 9, and the steam pressure is maintained at the normal pressure.

[発明の効果] 以上説明したように本発明によれば、緊急用の調整弁を
共用調整弁の一つとしたことで、脱気器周りの配管を少
なくし、また部品個数を少なくできる。
[Effects of the Invention] As explained above, according to the present invention, by using the emergency regulating valve as one of the common regulating valves, the number of piping around the deaerator can be reduced, and the number of parts can be reduced.

さらに、緊急時の蒸気圧並びに給水水位の調整制御が容
易になる利点がある。
Furthermore, there is an advantage that the adjustment control of the steam pressure and the water supply level in an emergency becomes easy.

また、共用調整弁の取り出し口を通常水位より高く異常
水位より低い位置に配設したことにょり、前記の圧力、
水位調整の際に無駄な蒸気の排出を押え、迅速に通常状
態に復帰させることができる利点もある.
In addition, by arranging the outlet of the common regulating valve at a position higher than the normal water level and lower than the abnormal water level, the above-mentioned pressure,
It also has the advantage of suppressing wasteful steam emissions when adjusting the water level and quickly returning to normal conditions.

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

第1図は本発明の一実施例の構成を示す説明図、第2図
は同じく一実施例にお番ナる緊急時の水位.圧力制御状
態を示す説明図、第3図は従来に実施例の構戒を示す説
明図である。 [主要部分の符号の説明] 1・・・脱気器、3・・・共用調整弁、5・・・蒸気流
入弁、7・・・給水流入弁、9・・・蒸気制御手段、l
1・・・給水制御手段。
FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the water level in an emergency according to the embodiment. FIG. 3 is an explanatory diagram showing the pressure control state, and FIG. 3 is an explanatory diagram showing the configuration of the conventional embodiment. [Explanation of symbols of main parts] 1... Deaerator, 3... Common adjustment valve, 5... Steam inflow valve, 7... Water supply inflow valve, 9... Steam control means, l
1...Water supply control means.

Claims (1)

【特許請求の範囲】 蒸気流入調整弁と、給水流入調整弁とを有し、所定の蒸
気圧並びに所定の水位の状態で給水中の溶存ガスを脱気
する脱気器において、 脱気器内部の通常水位より高く異常水位より低い位置に
取り出し口を備え、緊急時に脱気器内部の水位若しくは
蒸気圧力を減少させるための共用調整弁を有し、 脱気器内部の水位が、異常水位より高い危険水位に達し
た場合に前記共用調整弁を開き、異常水位に下がった場
合に前記共用調整弁を閉じる緊急水位制御手段と、 脱気器内部の蒸気圧が危険圧力に達した場合に前記共用
調整弁を開き、通常圧力に戻った場合に前記共用調整弁
を閉じる緊急圧力制御手段とを有することを特徴とする
緊急時の蒸気圧並びに水位制御装置を備えた脱気器。
[Scope of Claims] A deaerator that has a steam inflow regulating valve and a feed water inflow regulating valve and degasses dissolved gas in the feed water at a predetermined steam pressure and a predetermined water level, comprising: It has an outlet located higher than the normal water level and lower than the abnormal water level, and has a common regulating valve to reduce the water level or steam pressure inside the deaerator in case of an emergency, so that the water level inside the deaerator is lower than the abnormal water level. emergency water level control means that opens the common regulating valve when a high dangerous water level is reached and closes the common regulating valve when the water level drops to an abnormal water level; 1. A deaerator equipped with an emergency steam pressure and water level control device, comprising an emergency pressure control means that opens a common regulating valve and closes the common regulating valve when the pressure returns to normal.
JP23155789A 1989-09-08 1989-09-08 Deaerator device having control device for steam pressure and water level in emergency Pending JPH0395301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23155789A JPH0395301A (en) 1989-09-08 1989-09-08 Deaerator device having control device for steam pressure and water level in emergency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23155789A JPH0395301A (en) 1989-09-08 1989-09-08 Deaerator device having control device for steam pressure and water level in emergency

Publications (1)

Publication Number Publication Date
JPH0395301A true JPH0395301A (en) 1991-04-19

Family

ID=16925373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23155789A Pending JPH0395301A (en) 1989-09-08 1989-09-08 Deaerator device having control device for steam pressure and water level in emergency

Country Status (1)

Country Link
JP (1) JPH0395301A (en)

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