JPS6352281B2 - - Google Patents
Info
- Publication number
- JPS6352281B2 JPS6352281B2 JP54114213A JP11421379A JPS6352281B2 JP S6352281 B2 JPS6352281 B2 JP S6352281B2 JP 54114213 A JP54114213 A JP 54114213A JP 11421379 A JP11421379 A JP 11421379A JP S6352281 B2 JPS6352281 B2 JP S6352281B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- flow rate
- water level
- tank
- level
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 135
- 239000007921 spray Substances 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 description 10
- 238000007664 blowing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000002123 temporal effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Control Of Non-Electrical Variables (AREA)
Description
【発明の詳細な説明】
この発明は、間欠的に動作する負荷へ脱気水を
供給する脱気器に適した水位レベルの制御方式に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water level control system suitable for a deaerator that supplies deaerated water to a load that operates intermittently.
例えば製鋼設備の一つとして酸素転炉が知られ
ており、この酸素転炉は吹錬時に多量の廃ガスを
発生する。この廃ガスは一酸化炭素ガスに富む有
価ガスであるので回収して燃料として用いられ
る。かかる廃ガス回収のための廃ガス処理装置の
煙道の一部である輻射部は、廃ガスが高温なため
加熱されるので、その周囲にパイプで冷却水を流
すことにより輻射部本体の熱に対する保護を図つ
ている。かかる冷却水としては、水の中に溶存酸
素や炭酸ガスが存在すると材料の腐食を招くなど
悪影響があるので、周知のように脱気水が用いら
れている。他方、酸素転炉における１回の吹錬時
間は約15分間程度であり、バツチ的に運転され
る。従つて輻射部に対する冷却水の供給も、吹錬
時には多く、非吹錬時には少なく、間欠的に行な
われる。この発明は、このように冷却水として間
欠的に供給される脱気水を作るための脱気器に適
した水位レベル制御方式に関するものである。 For example, an oxygen converter is known as one type of steel manufacturing equipment, and this oxygen converter generates a large amount of waste gas during blowing. Since this waste gas is a valuable gas rich in carbon monoxide gas, it is recovered and used as fuel. The radiant part, which is a part of the flue of the waste gas treatment equipment for recovering waste gas, is heated because the waste gas is at a high temperature, so by flowing cooling water through a pipe around the radiant part, the heat of the radiant part itself is reduced. We are trying to protect against. As such cooling water, degassed water is used as is well known, since the presence of dissolved oxygen or carbon dioxide in water has an adverse effect such as corrosion of materials. On the other hand, one blowing time in an oxygen converter is about 15 minutes, and it is operated in batches. Therefore, the supply of cooling water to the radiant section is also carried out intermittently, with a large amount during blowing and a small amount during non-blowing. The present invention relates to a water level control system suitable for a deaerator for producing deaerated water that is intermittently supplied as cooling water.
第１図は、脱気器の給水系統の概要とこの発明
の一実施例を示す概要図であるが、先ず第１図を
参照して脱気器給水系統の概要を説明する。輻射
部は、その周囲に巻かれたパイプを通る冷却水を
加熱することになるので、ボイラーと考えてよ
い。そこでボイラー１があり、その中を冷却水管
路２が走り、該管路２の中をポンプ３により冷却
水が送られる。冷却水はドラム４から供給され、
ボイラー１の中で加熱され、高温（200℃乃至250
℃）になつてドラム４へ戻る。従つてドラム４内
で水の一部は蒸気となつて出て行く。従つてドラ
ム４へその分だけ給水する必要があり、脱気器で
脱気された水がタンク５からポンプ８により脱気
水管路７を経てドラム４へ供給される。 FIG. 1 is a schematic diagram showing an outline of a deaerator water supply system and an embodiment of the present invention.First, the outline of the deaerator water supply system will be explained with reference to FIG. The radiant can be thought of as a boiler, since it heats the cooling water that passes through the pipes wrapped around it. There is a boiler 1, inside which runs a cooling water pipe 2, through which cooling water is sent by a pump 3. Cooling water is supplied from drum 4,
It is heated in boiler 1 and reaches a high temperature (200℃ to 250℃).
°C) and return to drum 4. A portion of the water within the drum 4 thus leaves as steam. Therefore, it is necessary to supply water to the drum 4 correspondingly, and water deaerated by the deaerator is supplied from the tank 5 to the drum 4 via the deaerated water pipe 7 by the pump 8.
このために、ドラム４にはドラム水位発信器２
０が取り付けられ、ドラム水位測定値がドラム水
位調節器２１へ与えられる。一方、脱気水管路７
には、脱気水補給量を測定するために、オリフイ
ス２２、脱気水補給量発信器２３、補給量調節器
２４が付設されている。さらに、脱気水管路７に
は脱気水補給量調節弁２８が設けられている。ま
た、蒸気管２９にはオリフイス２５および蒸気流
量発信器２６が付設されている。そして、ドラム
水位調節器２１の出力および蒸気流量発信器２６
の出力は演算器２７に供給され、この演算器２７
においては、ドラム水位発信器２０によつて測定
されたドラム水位測定値と蒸気流量発信器２６に
よつて測定された蒸気流量測定値とに基づいて、
ドラム４への脱気水補給量の設定値が演算され
る。この脱気水補給量設定値が補給量調節器２４
に与えられて、この脱気水補給量発信器２３によ
つて測定された脱気水補給量の測定値と比較さ
れ、その偏差に基づいて脱気水補給量調節弁２８
が制御される。それにより、ドラム水位は設定レ
ベルに維持される。 For this purpose, the drum 4 is equipped with a drum water level transmitter 2.
0 is attached and the drum water level measurement is provided to the drum water level regulator 21. On the other hand, deaerated water pipe 7
is equipped with an orifice 22, a deaerated water replenishment amount transmitter 23, and a replenishment amount regulator 24 in order to measure the deaerated water replenishment amount. Further, the deaerated water pipe line 7 is provided with a deaerated water replenishment amount regulating valve 28. Further, the steam pipe 29 is provided with an orifice 25 and a steam flow rate transmitter 26. Then, the output of the drum water level regulator 21 and the steam flow rate transmitter 26
The output of is supplied to the computing unit 27, and this computing unit 27
Based on the drum water level measurement measured by the drum water level transmitter 20 and the steam flow rate measurement value measured by the steam flow rate transmitter 26,
A set value for the amount of degassed water to be supplied to the drum 4 is calculated. This deaerated water replenishment amount set value is determined by the replenishment amount adjuster 24.
is compared with the measured value of the deaerated water replenishment amount measured by the deaerated water replenishment amount transmitter 23, and the deaerated water replenishment amount adjustment valve 28 is operated based on the deviation.
is controlled. Thereby, the drum water level is maintained at the set level.
第１図において、タンク５は脱気器を構成する
タンクであり、その中へ蒸気管６を通じて蒸気が
送り込まれている。タンク５の上部に取り付けら
れた噴霧ノズル９へ、給水管路１０から供給され
た水は、該ノズルにより霧状に微粒化して降下
し、蒸気と接触することにより加熱され脱気され
る。給水管路１０から供給された水が脱気される
ためには、、噴霧ノズル９から霧状になつて降下
することが必要条件の一つとなつている。 In FIG. 1, a tank 5 is a tank constituting a deaerator, into which steam is sent through a steam pipe 6. The water supplied from the water supply pipe 10 to the spray nozzle 9 attached to the upper part of the tank 5 is atomized into atomized particles by the nozzle and falls, and is heated and degassed by contact with steam. In order for the water supplied from the water supply pipe 10 to be deaerated, one of the necessary conditions is for it to descend from the spray nozzle 9 in the form of mist.
ところで従来の脱気器における水位レベル制御
は、タンク５内の水位レベルが設定レベルに維持
されるように、給水管路１０を流れる水量を調節
するものであつた。転炉の吹錬時には、ボイラー
１が高温になり、管路２を流れる冷却水も強く加
熱されるのでドラム４から出て行く蒸気の量も多
くなる。従つてタンク５から管路７を経てドラム
４へ補給される脱気水も多く必要とし、そのため
給水管路１０からも多量の水が送られて噴霧ノズ
ル９に供給され、該ノズルから霧状になつて降下
する。ところが転炉の非吹錬時には、ボイラー１
は高温にならないから、先の場合と異なり、タン
ク５からドラム４へ補給される脱気水も少なくて
よく、管路１０から供給される水も少なくてよ
い。水量が少ないと噴霧ノズル９からは、水が霧
状に噴射されず、ちよろちよろと流れる単なる水
の流れとして落下する。従つてタンク５内での脱
気能力が失われるという問題が生じる。転炉の如
きバツチ操業をする負荷に対して脱気水を補給す
る場合には、脱気器が間欠的に脱気能力を失い、
全体として脱気効率が悪くなるという欠点があつ
た。 By the way, water level control in a conventional deaerator has been to adjust the amount of water flowing through the water supply pipe 10 so that the water level in the tank 5 is maintained at a set level. During blowing in the converter, the boiler 1 becomes high in temperature and the cooling water flowing through the pipe line 2 is also strongly heated, so the amount of steam leaving the drum 4 also increases. Therefore, a large amount of degassed water is required to be supplied from the tank 5 to the drum 4 via the pipe line 7, and therefore a large amount of water is also sent from the water supply pipe line 10 and supplied to the spray nozzle 9, from which it is sprayed in the form of a mist. descends. However, when the converter is not blowing, boiler 1
Since the temperature does not reach a high temperature, the amount of degassed water supplied from the tank 5 to the drum 4 may be less, and the amount of water supplied from the pipe line 10 may also be less, unlike the previous case. If the amount of water is small, the water will not be sprayed from the spray nozzle 9 in the form of mist, but will fall as a mere trickling stream of water. Therefore, a problem arises in that the deaeration ability within the tank 5 is lost. When replenishing deaerated water to a load that operates in batches, such as a converter, the deaerator may intermittently lose its deaeration capacity, resulting in
The drawback was that the degassing efficiency deteriorated overall.
この発明は、上述のような従来技術の欠点を克
服するためになされたものであり、従つてこの発
明の目的は、脱気水の補給量が減少した場合にも
脱気能力を維持できるようにした脱気器における
水位レベルの制御方式を提供することにある。 This invention has been made to overcome the drawbacks of the prior art as described above, and an object of the invention is to maintain the deaeration ability even when the amount of deaeration water supplied is reduced. An object of the present invention is to provide a water level control method in a deaerator.
この発明の構成の要点は、脱気器を構成するタ
ンクにおいて、噴霧ノズルに供給すべき水の量が
或る限度以下に低下して脱気能力が失われるとき
には、給水を全部止めてしまい、タンク内の給水
レベルが下限まで低下し、設定レベルに対する偏
差レベルが充分大きくなつたとき給水を再開する
ことにより、まとまつた量の給水を行なつて噴霧
させ脱気能力を維持するようにした点にある。 The main point of the configuration of this invention is that when the amount of water to be supplied to the spray nozzle in the tank constituting the deaerator drops below a certain limit and the deaeration ability is lost, all water supply is stopped. By restarting the water supply when the water supply level in the tank drops to the lower limit and the deviation level from the set level becomes sufficiently large, a large amount of water is supplied and sprayed to maintain the deaeration ability. It is in.
次に図を参照してこの発明の一実施例を詳細に
説明する。再び第１図を参照する。脱気器水位発
信器１１はタンク５内の水位レベルを検出して演
算器付水位調節計１２へ送る。給水管１０にオリ
フイス１４を設け、そこで差圧を検出することに
より測定された給水流量を脱気器給水流量発信器
１３が調節計１２へ送る。調節計１２は操作出力
を給水流量調節弁１５へ送つて管路１０を流れる
給水流量を調節する。以上の如き構成において、
如何なる制御方式を採るかを次に説明する。 Next, one embodiment of the present invention will be described in detail with reference to the drawings. Referring again to FIG. The deaerator water level transmitter 11 detects the water level in the tank 5 and sends it to the water level controller 12 with a calculator. An orifice 14 is provided in the water supply pipe 10, and a deaerator water supply flow rate transmitter 13 sends the measured water supply flow rate to the controller 12 by detecting the differential pressure there. The controller 12 sends an operation output to the water supply flow rate control valve 15 to adjust the flow rate of the water supply flowing through the pipe 10 . In the above configuration,
The control method to be adopted will be explained next.
今、管路１０を流れる給水流量が、規定の流量
の30％以下に低下すると、噴霧ノズル９からの噴
射が弱くなり脱気能力が不充分になることが判明
しているものとする。管路１０を流れる給水流量
が30％以上のときは、調節計１２は、水位発信器
１１からの給水レベルと流量発信器１３からの給
水流量に基づき、タンク５内の水位が設定レベル
を維持するよう、調節弁１５へ操作出力を送つて
通常のPI制御を行なう。給水流量が30％以下に
なると、調節計１２は調節弁１５を全閉としてタ
ンク５への給水を断つ。そのためタンク５内の水
位は少しづつ低下し或る下限に達したとする。こ
のとき調節計１２は、調節弁１５を開いてPI動
作による通常の自動制御を再開する。このとき
は、タンク５内の水位は、設定レベルに対し偏差
が大きいので調節計１２によるＩ動作が強く利く
ため、調節弁１５の開度が大きくなる。そこで管
路１０には規定量の30％を越える水量が流れ、脱
気器は脱気能力を維持できる。次いでタンク５内
の水位は上昇する。水位上昇が上限に達する前
に、給水流量が30％以下に低下したらその時点で
また調節弁１５を全閉する。以上のような制御方
式は、一見すると危険なように見えるが、管路１
０における給水流量が少ないということは、転炉
で云えば非吹錬時に当たること、またタンク５内
の容積が大きければ、その水位が前述の下限に達
してから、更に本当に危険な水位である下々限レ
ベルに達するまでにはかなりの余裕時間をとり得
ること、などの理由により実用上問題を生じない
と云える。 Assume now that it has been found that if the flow rate of water flowing through the pipe 10 decreases to 30% or less of the specified flow rate, the spray from the spray nozzle 9 will become weaker and the deaeration capacity will become insufficient. When the water supply flow rate flowing through the pipe 10 is 30% or more, the controller 12 maintains the water level in the tank 5 at the set level based on the water supply level from the water level transmitter 11 and the water supply flow rate from the flow rate transmitter 13. In order to do so, normal PI control is performed by sending the operation output to the control valve 15. When the water supply flow rate becomes 30% or less, the controller 12 completely closes the control valve 15 and cuts off the water supply to the tank 5. Therefore, it is assumed that the water level in the tank 5 gradually decreases and reaches a certain lower limit. At this time, the controller 12 opens the control valve 15 and resumes normal automatic control by PI operation. At this time, since the water level in the tank 5 has a large deviation from the set level, the I operation by the controller 12 is strongly effective, so that the opening degree of the control valve 15 becomes large. Therefore, an amount of water exceeding 30% of the specified amount flows through the pipe 10, and the deaerator can maintain its deaeration capacity. The water level in tank 5 then rises. If the water supply flow rate drops to 30% or less before the water level rise reaches the upper limit, the control valve 15 is fully closed again at that point. Although the control method described above may seem dangerous at first glance,
The low water supply flow rate at 0 means that the converter is not blowing, and if the volume inside the tank 5 is large, the water level will become even more dangerous once it reaches the lower limit mentioned above. It can be said that there is no problem in practice because it can take a considerable amount of time to reach the lower limit level.
第２図は、この発明によつた場合の、給水流量
に対する調節弁１５の開度を示した特性図であ
る。給水流量が30％以下では弁開度が零になるこ
とが示されている。 FIG. 2 is a characteristic diagram showing the opening degree of the control valve 15 with respect to the water supply flow rate according to the present invention. It has been shown that the valve opening becomes zero when the water supply flow rate is less than 30%.
第３図は第１図に示した実施例の動作を説明す
るための動作説明図である。この第３図におい
て、ａはドラム４からの蒸気流量の時間的変化、
ｂはドラム４への脱気水補給量の時間的変化、ｃ
は脱気器（タンク５）への給水量の時間的変化、
ｄはタンク５内の水位レベル時間的変化をそれぞ
れ示す。しかして、同図ａに示す如く非吹錬時に
なるとドラム４からの蒸気流量が減少し、その結
果同図ｂに示す如くドラム４への脱気水補給量も
減少する。それに応じて、同図ｃに示す如く脱気
器給水量も減少し、そしてついには脱気器給水量
が時刻t1にFL（例えば、規定流量の30％値）以下
になると調節弁１５が閉にされる。その結果、タ
ンク５内の水位レベルは徐々に低下する。時刻t2
にタンク５内の水位レベルが制御再開値LLに到
達すると、調節弁１５が開にされて、レベル制御
が再開される。このとき、この制御再開値LLは
タンク５内に水位レベル設定値に比較して偏差が
大きいので、その偏差をなくすために調節弁１５
が大きく開かれ、多流量の給水が供給されること
になり、その結果、給水は噴霧ノズル９の先端で
は霧状になる。そして、タンク５内の水位レベル
が上昇するに従つて調節弁１５の開度が小さくな
り、そのために給水流量が少なくなり、ついには
時点t3に再び噴霧ノズル９の先端で霧状噴出が出
来なくなる給水流量FLに達すると、上述と同様
にして、調節弁１５が閉にされる。このような制
御が時点t4，t5と繰り返し行われる。このように
タンク５内の水位レベルは制御再開値LLになる
と再び増加させられるので、その制御再開値LL
の定め方に注意すれば、危険を生ずることはな
い。 FIG. 3 is an operational explanatory diagram for explaining the operation of the embodiment shown in FIG. In this FIG. 3, a is the temporal change in the steam flow rate from the drum 4,
b is the temporal change in the amount of degassed water supplied to the drum 4, c
is the temporal change in the amount of water supplied to the deaerator (tank 5),
d indicates a temporal change in the water level in the tank 5, respectively. However, as shown in FIG. 5A, when the blowing is not performed, the flow rate of steam from the drum 4 decreases, and as a result, the amount of degassed water supplied to the drum 4 also decreases, as shown in FIG. Accordingly, the amount of water supplied to the deaerator decreases as shown in c in the figure, and finally, when the amount of water supplied to the deaerator becomes less than F L (for example, 30% of the specified flow rate) at time t1 , the control valve 15 is closed. As a result, the water level in the tank 5 gradually decreases. time t 2
When the water level in the tank 5 reaches the control restart value LL , the control valve 15 is opened and the level control is restarted. At this time, this control restart value L L has a large deviation compared to the water level setting value in the tank 5, so in order to eliminate the deviation, the control valve 15
is opened wide and a large amount of water is supplied, and as a result, the water becomes atomized at the tip of the spray nozzle 9. As the water level in the tank 5 rises, the opening degree of the control valve 15 becomes smaller, and as a result, the water supply flow rate decreases, and finally, at time t3 , atomized spray is generated again at the tip of the spray nozzle 9. When the water supply flow rate F L is reached, the control valve 15 is closed in the same manner as described above. Such control is repeated at times t4 and t5 . In this way, the water level in the tank 5 is increased again when it reaches the control restart value L L.
If you pay attention to how to set the values, there will be no danger.
なお、本発明においては、第１図の説明からも
理解出来るように、ドラム４内の水位レベルの制
御と、タンク５内の水位レベルの制御とは全く独
立に行われる。即ち、先ず、ドラム水位発信器２
０、ドラム水位が水位調節器２１、脱気水補給量
発信器２３、補給量調節器２４、蒸気流量発信器
２６、演算器２７および調節弁２８から成る制御
ループによつて、蒸気管２９を介して流出する蒸
気流量ならびにドラム水位に応じてドラム４内の
水位レベルが設定レベルに制御される。そのため
にタンク５から脱気水がドラム４に補給される。
一方、タンク５では、その補給分に応じて、脱気
器水位発信器１１、演算器付水位調節計１２、脱
気器給水流量発信器１３および給水流量調節弁１
５から成る制御ループによつて、タンク５内の水
位レベルが設定レベルに制御される。そのため
に、給水がタンク５に供給される。このようにし
て、結果的に、蒸気管２９を介して流出する蒸気
流量と、給水管路１０を介して供給される給水流
量とはバランスが取れるようになる。 In the present invention, as can be understood from the explanation of FIG. 1, the control of the water level in the drum 4 and the control of the water level in the tank 5 are performed completely independently. That is, first, the drum water level transmitter 2
0, the drum water level is controlled by a control loop consisting of a water level regulator 21, a deaerated water replenishment amount transmitter 23, a replenishment amount regulator 24, a steam flow rate transmitter 26, a calculator 27, and a control valve 28. The water level in the drum 4 is controlled to a set level depending on the flow rate of steam flowing out through the drum 4 and the drum water level. For this purpose, the drum 4 is replenished with degassed water from the tank 5.
On the other hand, in the tank 5, a deaerator water level transmitter 11, a water level controller with arithmetic unit 12, a deaerator water supply flow rate transmitter 13, and a water supply flow rate control valve 1 are installed in accordance with the replenishment amount.
5 controls the water level in the tank 5 to a set level. For this purpose, feed water is supplied to the tank 5. In this way, as a result, the flow rate of steam flowing out via the steam pipe 29 and the flow rate of water supply supplied via the water supply pipe line 10 can be balanced.
以上説明したとおりであるから、この発明によ
れば、脱気器への給水流量が大きく変動する場合
でも、脱気能力を常に維持できるという利点がが
あり、ひいてはバツチプロセスで運転されるプラ
ントに対しても常に充分脱気された水を供給でき
るので、プラントの寿命、安全性を高め得るとい
う利点がある。 As explained above, the present invention has the advantage that the deaeration capacity can be maintained at all times even when the flow rate of water supplied to the deaerator varies greatly, and this invention has the advantage that it is possible to maintain deaeration capacity at all times, and is useful for plants operated in a batch process. This has the advantage of increasing the lifespan and safety of the plant, since it can always supply sufficiently deaerated water.
第１図は脱気器の給水系統とこの発明の一実施
例を示す概要図、第２図は、この発明によつた場
合の、給水流量に対する調節弁の開度を示す特性
図、第３図は第１図に示した実施例の動作を説明
するための動作説明図である。
図において、１はボイラ、２は冷却水管路、３
はポンプ、４はドラム、５はタンク、６は蒸気
管、７は脱気水管路、８はポンプ、９は噴霧ノズ
ル、１０は給水管路、１１は脱気器水位発信器、
１２は演算器付水位調節計、１３は脱気器給水流
量発信器、１４はオリフイス、１５は給水流量調
節弁、を示す。
Fig. 1 is a schematic diagram showing a water supply system of a deaerator and an embodiment of the present invention; Fig. 2 is a characteristic diagram showing the opening degree of the control valve with respect to the water supply flow rate according to the present invention; The figure is an operational explanatory diagram for explaining the operation of the embodiment shown in FIG. 1. In the figure, 1 is the boiler, 2 is the cooling water pipe, and 3 is the boiler.
is a pump, 4 is a drum, 5 is a tank, 6 is a steam pipe, 7 is a deaerated water pipe, 8 is a pump, 9 is a spray nozzle, 10 is a water supply pipe, 11 is a deaerator water level transmitter,
12 is a water level controller with a calculator, 13 is a deaerator water supply flow rate transmitter, 14 is an orifice, and 15 is a water supply flow rate control valve.
Claims (1)
器における水位レベルの制御方法において、 前記タンクにおける水位レベルの検出手段と、 前記噴霧ノズルに供給される給水流量の測定手
段と、 検出された水位レベルと測定された給水流量と
に基づき給水流量を調節して前記タンク内の水位
レベルを制御する給水流量調節計と、を備え、 前記給水流量調節計は、測定された給水流量が
或る限界値以下に低下したときは、噴霧ノズルに
対する給水を遮断し、その後、タンク内水位レベ
ルが低下して調節計における設定水位に対するレ
ベル偏差が一定限度を超えて大きくなつたとき、
給水を再開して水位レベル制御動作に移行するよ
うにした、 ことを特徴とする脱気器における水位レベルの制
御方法。[Claims] 1. A method for controlling a water level in a deaerator comprising a spray nozzle in an upper part of a tank, comprising: means for detecting the water level in the tank; and means for measuring the flow rate of water supplied to the spray nozzle. and a water supply flow rate controller that controls the water level in the tank by adjusting the water supply flow rate based on the detected water level level and the measured water supply flow rate, When the water supply flow rate drops below a certain limit value, the water supply to the spray nozzle is cut off, and after that, when the water level in the tank decreases and the level deviation from the set water level on the controller increases beyond a certain limit. ,
A method for controlling a water level in a deaerator, characterized in that the water supply is restarted and the water level control operation is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11421379A JPS5640004A (en) | 1979-09-07 | 1979-09-07 | Water level controlling system for deairing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11421379A JPS5640004A (en) | 1979-09-07 | 1979-09-07 | Water level controlling system for deairing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5640004A JPS5640004A (en) | 1981-04-16 |
| JPS6352281B2 true JPS6352281B2 (en) | 1988-10-18 |
Family
ID=14632041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11421379A Granted JPS5640004A (en) | 1979-09-07 | 1979-09-07 | Water level controlling system for deairing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5640004A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140004A (en) * | 1975-05-28 | 1976-12-02 | Toshiba Corp | Water level controlling device of steam extractor |
-
1979
- 1979-09-07 JP JP11421379A patent/JPS5640004A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140004A (en) * | 1975-05-28 | 1976-12-02 | Toshiba Corp | Water level controlling device of steam extractor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5640004A (en) | 1981-04-16 |
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