JP2006146436A - Flow control device and flow control method - Google Patents

Flow control device and flow control method Download PDF

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JP2006146436A
JP2006146436A JP2004333652A JP2004333652A JP2006146436A JP 2006146436 A JP2006146436 A JP 2006146436A JP 2004333652 A JP2004333652 A JP 2004333652A JP 2004333652 A JP2004333652 A JP 2004333652A JP 2006146436 A JP2006146436 A JP 2006146436A
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valve
flow rate
opening
steam
opening degree
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JP4480552B2 (en
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Hiroyuki Kinoshita
博之 木下
Chikamasa Toriie
親昌 鳥家
Koji Kido
孝治 城戸
Kazuhiko Yamamoto
山本　　和彦
Toshikazu Tsunoda
敏和 角田
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Chugoku Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow control device and a method capable of preventing that opening and closing operation of a flow adjusting valve attached to a conduit in a system for supplying steam through the conduit cannot be performed by sticking (fixation) to dispense with periodic opening and closing inspection of the valve. <P>SOLUTION: This flow control device comprises the flow adjusting valve for adjusting, in a steam supplying device for supplying steam from a boiler device via the conduit by force feeding, the steam flow rate in the conduit; a means measuring a flow rate carried in the conduit; a means for determining the relation between a steam supply flow rate (t/h) and a valve opening (%) based on a predetermined value pressure loss (MPa) in the flow adjusting valve; a means for determining a valve opening increased while giving a predetermined tolerance to the valve opening (%) as a valve follow-up opening (%) to the steam supply flow rate (t/h); and a means controlling the valve opening of the flow adjusting valve to operate based on the valve follow-up opening (%). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ボイラ装置から管路を経由して蒸気を圧送して供給するため系統にかかり、より詳細には、蒸気供給の際にその管路を流れる流量を調整するための流量調整弁を備える流量制御装置またはその方法に関するものである。   The present invention relates to a system for pumping and supplying steam from a boiler device via a pipeline, and more specifically, a flow rate adjusting valve for adjusting the flow rate flowing through the pipeline when supplying steam. The present invention relates to a flow control device or a method therefor.

図４は、従来における蒸気供給で用いられる管路の系統図である。この系統１００で供給される蒸気１２は、管路(母管)１１を経由してボイラ１０側から客先側１３へと導かれる。この管路(母管)１１上には、分岐点１１ａにおいて中圧タービン１６側へと分岐する分岐管路１５を備えており、この分岐点１１ａより客先１３側に寄った位置には流量調節弁１４が配置されている。   FIG. 4 is a system diagram of a pipe line used in conventional steam supply. The steam 12 supplied by the system 100 is guided from the boiler 10 side to the customer side 13 via a pipe line (parent pipe) 11. A branch pipe 15 that branches to the intermediate pressure turbine 16 side at the branch point 11a is provided on the pipe (mother pipe) 11, and a flow rate is provided at a position closer to the customer 13 side than the branch point 11a. A control valve 14 is arranged.

図４のような従来の蒸気供給プラントの系統では、管路上に開閉可能な流量調節弁１４を設置しておき、通常時では「常時全開状態」になるように設定されているものの、流量超過時またはプラント保護動作時などの特定時においては、この弁１４を開状態から閉状態へと変換する動作をさせて、プラントを保護する必要がある。ところが、このような流量調節弁１４は、通常時では常に全開状態にして使用しているために、この弁１４がスティック（固着化、膠着化）してしまい、弁が開状態のまま閉じないという状況が起こることがある。この流量調節弁１４を閉じなければならないときに、この弁１４が開から閉へと移行動作しなくなるということは、蒸気供給のためのプラント自体を保護することが出来なくなる、ということを意味する。
なお、本発明に関連する分野の特許文献としては、例えば次のようなものがある。
特開２００２−４８９４号公報 In the system of the conventional steam supply plant as shown in FIG. 4, the flow control valve 14 that can be opened and closed is installed on the pipeline, and is set so as to be “always fully open” under normal conditions. At a specific time such as the time or the plant protection operation, it is necessary to protect the plant by performing an operation of converting the valve 14 from the open state to the closed state. However, since such a flow rate control valve 14 is always used in a fully open state during normal operation, the valve 14 is sticked (fixed or stuck), and the valve remains open and does not close. The situation may occur. When the flow control valve 14 has to be closed, the fact that the valve 14 does not shift from opening to closing means that the plant for supplying steam cannot be protected. .
In addition, as a patent document of the field | area relevant to this invention, there exist the following, for example.
JP 2002-4894 A

上述のように、従来の蒸気供給のためのシステム系統では、管路(流路)に設けられた流量調節弁１４がスティック(固着)してしまって閉じなくなる場合があり、このようなスティック防止のためには、定期的な頻度を定めて、管路上に設置された流量調節弁１４に開閉動作をさせて、スティック(固着)が無いことを確認するための点検をしなければない、という問題点があった。   As described above, in the conventional system for supplying steam, the flow rate control valve 14 provided in the pipe (flow path) may stick (stick) and cannot be closed. In order to achieve this, it is necessary to set a periodic frequency, open and close the flow control valve 14 installed on the pipe line, and perform an inspection to confirm that there is no stick (sticking). There was a problem.

本発明は前述の問題点に鑑みてなされたものであり、この流量調節弁１４がスティック(固着)して開閉動作ができなくなるということを防ぎ、定期的な弁の開閉点検の必要を無くし、また、蒸気供給にかかわる系統のシステム効率化・低コスト化などにも寄与することのできる流量制御装置およびその方法を提供することをその目的とする。   The present invention has been made in view of the above-mentioned problems, and prevents the flow rate control valve 14 from sticking (adhering) to be unable to open and close, eliminating the need for periodic valve opening and closing checks, It is another object of the present invention to provide a flow rate control apparatus and method that can contribute to system efficiency and cost reduction of a system related to steam supply.

（１）ボイラ装置から管路を経由して蒸気を圧送して供給するため蒸気供給装置において、前記管路の蒸気流量を調整するための流量調整弁と、前記管路を流れる流量を測定する手段と、を備え、
前記流量調整弁における所定の弁圧損(ＭＰａ)の値に基づいて、蒸気供給流量(ｔ/ｈ)と弁開度(％)との関係を求める手段と、
前記弁開度(％)に所定の余裕度を持たせて増加させた弁開度を、弁追従開度(％)として定める手段と、
前記流量調整弁の弁開度を、前記蒸気供給流量(ｔ/ｈ)に対する前記弁追従開度(％)に基づいて制御する手段と、を備える。 (1) In a steam supply device for supplying steam by pressure from a boiler device via a pipeline, a flow rate adjusting valve for adjusting the steam flow rate of the pipeline and a flow rate flowing through the pipeline are measured. Means, and
Means for determining a relationship between a steam supply flow rate (t / h) and a valve opening (%) based on a predetermined valve pressure loss (MPa) in the flow rate adjusting valve;
Means for determining, as a valve follow-up opening degree (%), a valve opening degree that is increased by giving a predetermined margin to the valve opening degree (%);
Means for controlling the valve opening degree of the flow rate adjusting valve based on the valve follow-up opening degree (%) with respect to the steam supply flow rate (t / h).

（２）(１)の流量制御装置において、
前記弁追従開度(％)は、前記弁開度(％)に１５〜２５％の余裕度を加えて構成される。 (2) In the flow control device of (1),
The valve follow-up opening degree (%) is configured by adding a margin of 15 to 25% to the valve opening degree (%).

（３）ボイラ装置から管路を経由して蒸気を圧送して供給するための蒸気供給方法であって、前記管路の蒸気流量を調整するための流量調整弁と、前記管路を流れる流量を測定する手段と、を備え、
前記流量調整弁における所定の弁圧損(ＭＰａ)の値に基づいて、蒸気供給流量(ｔ/ｈ)と弁開度(％)との関係を求めるステップと、
前記弁開度(％)に所定の余裕度を持たせて増加させた弁開度を、弁追従開度(％)として定めるステップと、
前記流量調整弁の弁開度を、前記蒸気供給流量(ｔ/ｈ)に対する前記弁追従開度(％)に基づいて制御するステップと、を備える。 (3) A steam supply method for pumping and supplying steam from a boiler device via a pipeline, a flow rate adjusting valve for adjusting the steam flow rate of the pipeline, and a flow rate flowing through the pipeline And means for measuring
Obtaining a relationship between a steam supply flow rate (t / h) and a valve opening (%) based on a value of a predetermined valve pressure loss (MPa) in the flow regulating valve;
Determining the valve opening increased by giving a predetermined margin to the valve opening (%) as a valve follow-up opening (%);
Controlling the valve opening degree of the flow rate adjusting valve based on the valve follow-up opening degree (%) with respect to the steam supply flow rate (t / h).

本発明による流量制御装置またはその方法によれば、蒸気供給系統で流路上に付設された流量調節弁において、実流量に対して余裕を持った値の弁追従開度を定め、この流量調節弁をこれに基づいて常時追従制御させるよう構成した。これにより、流路上の流量調節弁は中間開度で常に動作できるようになり、この流量調節弁１４がスティック(固着化)して開閉動作ができなくなるということを防止し、定期的な弁の開閉点検の必要が無くなる。   According to the flow control device or the method thereof according to the present invention, in the flow control valve provided on the flow path in the steam supply system, the valve follow-up opening having a value having a margin with respect to the actual flow is determined, and the flow control valve Based on this, it is configured to always follow-up control. As a result, the flow rate control valve on the flow path can always operate at an intermediate opening, and the flow rate control valve 14 is prevented from sticking (fixed) and cannot be opened and closed. No need for open / close inspection.

以下に、本発明による流量制御装置および流量制御方法にかかる好適な実施形態について、添付の図１〜３を参照して説明する。
図１は、本発明による流量制御装置の一実施形態にかかる蒸気供給のための系統図である。この系統２００で供給される蒸気２２は、管路(母管)２１を経由してボイラ２０側から客先側２３へと導かれ、管路(母管)２１上には、従来の系統図(図４)と同様に、流量調整弁２４を備える。そして、本発明によるこの系統２００では、流量調整弁２４の下流側にある管路２１'の流量を測定するための流量計(ＦＸ)２７と、この流量計(ＦＸ)２７からの測定信号に基づいて流量調整弁２４の開閉を制御するための弁制御部２８とを備え、この弁制御部２８は指令信号２８'を出力して流量調整弁２４の開閉動作を制御する。 DESCRIPTION OF EXEMPLARY EMBODIMENTS A preferred embodiment of a flow rate control device and a flow rate control method according to the present invention will be described below with reference to FIGS.
FIG. 1 is a system diagram for supplying steam according to an embodiment of a flow control device of the present invention. The steam 22 supplied by the system 200 is guided from the boiler 20 side to the customer side 23 via a pipeline (mother pipe) 21, and a conventional system diagram is provided on the pipeline (mother pipe) 21. As with (FIG. 4), a flow rate adjusting valve 24 is provided. In this system 200 according to the present invention, a flow meter (FX) 27 for measuring the flow rate in the pipe 21 ′ on the downstream side of the flow rate adjusting valve 24 and the measurement signal from the flow meter (FX) 27 are used. And a valve control unit 28 for controlling the opening / closing of the flow rate adjusting valve 24. The valve control unit 28 outputs a command signal 28 'to control the opening / closing operation of the flow rate adjusting valve 24.

図２は、図１の系統２００において、蒸気供給の管路に設置された流量調節(調整)弁２４の特性の一例を示す図である。
図２の上の表データは、流量調整弁２４において、所定の弁圧損(ＭＰａ)の値に基づいて、蒸気供給流量(ｔ/ｈ)と弁開度(％)と関係を実測により求めたものである。
図２の下のグラフ図中のＡ線は、図２の上の表データを基にした、蒸気供給流量(ｔ/ｈ)−弁開度(％)を示すラインである。また、Ｂ線は弁追従開度(％)を示す線であり、Ａ線における弁開度(％)に所定の余裕度(ここでは２０％)を持たせて増加させた弁開度を、蒸気供給流量(ｔ/ｈ)に対する弁追従開度(％)として定めて、この関係をグラフ化して示したものである。これらのＡ線とＢ線とは、共に弁開度１００％未満では略直線状のラインが得られている。 FIG. 2 is a diagram illustrating an example of characteristics of the flow rate adjustment (regulation) valve 24 installed in the steam supply pipeline in the system 200 of FIG.
The upper table data in FIG. 2 is obtained by actually measuring the relationship between the steam supply flow rate (t / h) and the valve opening degree (%) based on a predetermined valve pressure loss (MPa) value in the flow rate adjusting valve 24. Is.
A line A in the lower graph of FIG. 2 is a line indicating steam supply flow rate (t / h) −valve opening degree (%) based on the upper table data of FIG. 2. Line B is a line indicating the valve opening degree (%), and the valve opening degree increased by giving a predetermined margin (here, 20%) to the valve opening degree (%) in the line A, This relationship is defined as a valve follow-up opening degree (%) with respect to the steam supply flow rate (t / h), and this relationship is shown in a graph. As for these A line and B line, when the valve opening is less than 100%, a substantially linear line is obtained.

図２の下のグラフ図において、Ａ線はａ１−ａ２−ａ３を結んでプロットしたもので示され、Ｂ線はｂ１−ｂ２−を結んでプロットしたもので示されるが、図２の上の表データを参照して、これらのデータをまとめて示すと次のとおりである。
蒸気供給流量（スプレ量含まず） 弁開度 弁追従開度(＋２０％)
ａ１ ３５.２ｔ/ｈ １５％ ３５％ (ｂ１点)
ａ２ １００.１ｔ/ｈ ４４％ ６４％ (ｂ２点)
ａ３ ２２９.３ｔ/ｈ １００％ １００％ (ｂ３点) In the lower graph of FIG. 2, the A line is shown by plotting a1-a2-a3 and the B line is shown by plotting b1-b2-. With reference to the table data, these data are summarized as follows.
Steam supply flow rate (not including spray amount) Valve opening Valve following opening (+ 20%)
a1 35.2t / h 15% 35% (b1 point)
a2 100.1 t / h 44% 64% (b2 points)
a3 229.3t / h 100% 100% (b3 points)

図２の下のグラフ図において、地点毎に説明すると次のとおりである。
ａ１は、蒸気供給流量４０ｔ/ｈのときの値であって、弁圧損０.０６１３ＭＰａとなる弁開度は１５％であり、これに余裕度(ここでは２０％)を持たせて増加させた弁追従開度(％)では、蒸気供給流量４０ｔ/ｈのときに弁追従開度３５％（ｂ１点）となる。
ａ２は、蒸気供給流量１１４ｔ/ｈのときの値であって、弁圧損０.０６１３ＭＰａとなる弁開度は４４％であり、これに余裕度(ここでは２０％)を持たせて増加させた弁追従開度(％)は、蒸気供給流量１１４ｔ/ｈのときに弁追従開度６４％（ｂ２点）となる。
ａ３は、蒸気供給流量２６０ｔ/ｈのときの値であって、弁圧損０.０６１３ＭＰａとなる弁開度は１００％であり、これに余裕度(ここでは２０％)を持たせて増加させた弁追従開度(％)では、弁開度は１００％以上に増加させることはできないので、蒸気供給流量２６０ｔ/ｈのときに弁追従開度１００％のままとなり、ｂ３点はａ３点とその位置が重なこととなる。 In the lower graph of FIG. 2, each point will be described as follows.
a1 is a value when the steam supply flow rate is 40 t / h, and the valve opening degree at which the valve pressure loss becomes 0.0613 MPa is 15%, which is increased with a margin (20% here). In the valve follow-up opening degree (%), the valve follow-up opening degree is 35% (b1 point) when the steam supply flow rate is 40 t / h.
a2 is a value when the steam supply flow rate is 114 t / h, and the valve opening degree at which the valve pressure loss becomes 0.0613 MPa is 44%, which is increased with a margin (20% here). The valve follow-up opening degree (%) becomes the valve follow-up opening degree 64% (b2 point) when the steam supply flow rate is 114 t / h.
a3 is a value when the steam supply flow rate is 260 t / h, and the valve opening degree at which the valve pressure loss becomes 0.0613 MPa is 100%, which is increased with a margin (20% here). Since the valve opening cannot be increased to 100% or more at the valve follow-up opening (%), the valve follow-up opening remains at 100% when the steam supply flow rate is 260 t / h. The position will be heavy.

また図１の系統２００に戻ると、本発明では、流量調整弁２４における所定の弁圧損(ＭＰａ)の値に基づいて実測して、蒸気供給流量(ｔ/ｈ)と弁開度(％)との関係を求めておき、この弁開度(％)に所定の余裕度(ここでは２０％)を持たせて増加させた弁開度を弁追従開度(％)として定める。そして、この系統２００での流量調整弁２４の弁開度を、蒸気供給流量(ｔ/ｈ)に対する弁追従開度(％)として設定し、これらに基づいて、弁制御部２４では、流量計２７で実際に測定された蒸気供給流量(ｔ/ｈ)に対応する流量調整弁２４の弁開度が、弁追従開度(％)となるように制御する。なお、この弁追従開度(％)としては、弁開度(％)に１５〜２５％の余裕度を加えて構成されるのが好適であることが、実験の結果確認されている。   Returning to the system 200 of FIG. 1, in the present invention, the steam supply flow rate (t / h) and the valve opening (%) are measured based on a predetermined valve pressure loss (MPa) value in the flow rate adjusting valve 24. The valve opening degree which is increased by giving a predetermined margin (here, 20%) to this valve opening degree (%) is determined as the valve following opening degree (%). Then, the valve opening degree of the flow rate adjusting valve 24 in the system 200 is set as the valve follow-up opening degree (%) with respect to the steam supply flow rate (t / h), and based on these, the valve control unit 24 uses The valve opening degree of the flow rate adjusting valve 24 corresponding to the steam supply flow rate (t / h) actually measured at 27 is controlled to be the valve follow-up opening degree (%). As a result of experiments, it has been confirmed that the valve follow-up opening (%) is preferably configured by adding a margin of 15 to 25% to the valve opening (%).

このように、本発明では弁追従開度(％)を設定して流量調整弁２４を動作させることにより、流量調整弁２４の開閉を常に中間開度でフレキシブルに追従制御できるようになり、弁のスティック(固着)を防止することができる。また、図２に示すように、弁追従開度(％)の設定にあたっては、蒸気供給量が常用される範囲（４０〜２００ｔ／ｈ）において流量調整弁２４が常に動作するように設定され、また、客先の蒸気使用量が最も多くなる非定常時（２００ｔ／ｈ以上）においては、圧力損失が小さくなるよう流量調整弁２４を全開として設定する。   As described above, in the present invention, by setting the valve follow-up opening degree (%) and operating the flow rate adjusting valve 24, the opening and closing of the flow rate adjusting valve 24 can always be flexibly controlled with an intermediate opening amount. Can prevent sticking. Further, as shown in FIG. 2, in setting the valve follow-up opening degree (%), the flow rate adjusting valve 24 is set to always operate in a range in which the steam supply amount is regularly used (40 to 200 t / h). Further, in the non-steady state (200 t / h or more) when the customer's steam usage is the largest (200 t / h or more), the flow rate adjustment valve 24 is set to be fully opened so that the pressure loss is reduced.

図３は、本発明が適用可能な系統の例を示す図であって、蒸気供給系統図である。この図３の系統３００で供給される蒸気３２は、管路３１を経由してボイラ３０側から客先側３３へと導かれ、管路３１上に流量調整弁３４と、流量調整弁３４の下流側の管路３１'での実流量を測定する流量計(ＦＸ)３５とを備え、この流量計(ＦＸ)３５からの測定信号に基づいて、余裕度を持った値に設定された弁追従開度(％)に従って、流量調整弁３４の弁の開閉動作が制御される。なお、この図３の系統３００においては、管路３１上の流量調節弁３４の上流側には、逆止弁３６と蒸気供給元弁３７とが直列に配置され、この流量調節弁３４の下流側には温度計３８が直列に配置されている。   FIG. 3 is a diagram showing an example of a system to which the present invention can be applied, and is a steam supply system diagram. The steam 32 supplied in the system 300 of FIG. 3 is guided from the boiler 30 side to the customer side 33 via the pipeline 31, and the flow rate adjustment valve 34 and the flow rate adjustment valve 34 are connected to the pipeline 31. A flow meter (FX) 35 for measuring the actual flow rate in the downstream pipe line 31 ', and a valve set to a value having a margin based on a measurement signal from the flow meter (FX) 35 The opening / closing operation of the flow rate adjusting valve 34 is controlled according to the follow-up opening degree (%). In the system 300 of FIG. 3, a check valve 36 and a steam supply source valve 37 are arranged in series on the upstream side of the flow rate adjustment valve 34 on the pipe 31, and downstream of the flow rate adjustment valve 34. On the side, a thermometer 38 is arranged in series.

この図３の系統３００の管路３１上の流量調節弁３４は、通常時においては本発明による弁追従開度(％)に従って流量調節弁３４の開閉動作が制御されるが、ある特定時においてこの流量調節弁３４の開閉動作を別の設定にして制御することも可能である。
つぎに、その特定時の弁の動作の制御について、いくつかの例を挙げておく。
(１)温度計３８の測定において供給蒸気温度が「高」のときには、一定時限後、流量調節弁３４を「閉」とし、蒸気供給元弁３８を「閉」とする。
(２)流量計３５において蒸気供給可能量の超過のときは、流量調節弁３４は蒸気供給可能量以下に「制限」動作をする。
(３)蒸気遮断動作のときには、流量調節弁３４を「全閉」とする。 The flow control valve 34 on the pipe line 31 of the system 300 in FIG. 3 is normally controlled to open and close the flow control valve 34 according to the valve follow-up opening degree (%) according to the present invention. It is also possible to control the opening / closing operation of the flow rate adjusting valve 34 with different settings.
Next, some examples will be given for controlling the operation of the valve at the specific time.
(1) When the supply steam temperature is “high” in the measurement by the thermometer 38, the flow rate control valve 34 is set to “closed” and the steam supply source valve 38 is set to “closed” after a certain period of time.
(2) When the steam supply capacity exceeds the steam supply capacity in the flow meter 35, the flow control valve 34 performs a “restriction” operation below the steam supply capacity.
(3) During the steam shut-off operation, the flow control valve 34 is set to “fully closed”.

本発明による流量制御装置および流量制御方法は、蒸気を供給する系統において、管路上に設けられた流量調整弁がスティックすることのない流量制御システムとして広く適用することができ、とりわけ電気・エネルギー産業上での利用可能性は極めて大きい。   INDUSTRIAL APPLICABILITY The flow rate control device and the flow rate control method according to the present invention can be widely applied as a flow rate control system in which a flow rate adjusting valve provided on a pipe does not stick in a system for supplying steam. The above availability is extremely large.

本発明による流量制御装置または方法の一実施形態を示す系統図である。1 is a system diagram showing an embodiment of a flow control device or method according to the present invention. 本発明による流量制御装置または方法の一実施形態を説明するためのデータ図である。It is a data figure for demonstrating one Embodiment of the flow control apparatus or method by this invention. 本発明による流量制御装置または方法の別の実施形態を示す系統図である。It is a systematic diagram which shows another embodiment of the flow control apparatus or method by this invention. 従来の蒸気供給の流量制御を説明するための系統図である。It is a systematic diagram for demonstrating the flow control of the conventional steam supply.

符号の説明Explanation of symbols

２００ 系統
２０ ボイラ
２１、２１’ 管路(母管)
２２、２２’ 蒸気の流れ
２３ 客先
２４ 流量調整弁
２５ 再熱蒸気管
２６ タービン
２７ 流量計(ＦＸ)
２８ 弁制御部
Ａ 弁開度(％)を示す線
Ｂ 弁追従開度(％)を示す線 200 system 20 boiler 21, 21 'pipeline (mother pipe)
22, 22 'Steam flow 23 Customer 24 Flow control valve 25 Reheat steam pipe 26 Turbine 27 Flow meter (FX)
28 Valve control unit
A Line indicating valve opening (%)
B Line indicating valve follow-up opening (%)

Claims (3)

ボイラ装置から管路を経由して蒸気を圧送して供給するため蒸気供給装置において、
前記管路の蒸気流量を調整するための流量調整弁と、前記管路を流れる流量を測定する手段と、を備え、
前記流量調整弁における所定の弁圧損(ＭＰａ)の値に基づいて、蒸気供給流量(ｔ/ｈ)と弁開度(％)との関係を求める手段と、
前記弁開度(％)に所定の余裕度を持たせて増加させた弁開度を、前記蒸気供給流量(ｔ/ｈ)に対する弁追従開度(％)として定める手段と、
前記流量調整弁の弁開度を、前記弁追従開度(％)に基づいて動作するよう制御する手段と、を備えることを特徴とする流量制御装置。 In the steam supply device for supplying steam by pressure from the boiler device via a pipeline,
A flow rate adjusting valve for adjusting the steam flow rate of the pipeline, and means for measuring the flow rate flowing through the pipeline,
Means for determining a relationship between a steam supply flow rate (t / h) and a valve opening (%) based on a predetermined valve pressure loss (MPa) in the flow rate adjusting valve;
Means for determining, as a valve follow-up opening degree (%) with respect to the steam supply flow rate (t / h), a valve opening degree obtained by increasing the valve opening degree (%) with a predetermined margin;
And a means for controlling the valve opening degree of the flow rate adjusting valve so as to operate based on the valve follow-up opening degree (%). 請求項１に記載の流量制御装置において、
前記弁追従開度(％)は、前記弁開度(％)に１５〜２５％の余裕度を加えて構成される、ことを特徴とする流量制御装置。 The flow control device according to claim 1,
The valve follow-up opening degree (%) is configured by adding a margin of 15 to 25% to the valve opening degree (%). ボイラ装置から管路を経由して蒸気を圧送して供給するため蒸気供給方法であって、
前記管路の蒸気流量を調整するための流量調整弁と、前記管路を流れる流量を測定する手段と、を備え、
前記流量調整弁における所定の弁圧損(ＭＰａ)の値に基づいて、蒸気供給流量(ｔ/ｈ)と弁開度(％)との関係を求めるステップと、
前記弁開度(％)に所定の余裕度を持たせて増加させた弁開度を、前記蒸気供給流量(ｔ/ｈ)に対する弁追従開度(％)として定めるステップと、
前記流量調整弁の弁開度を、前記弁追従開度(％)に基づいて動作させるよう制御するステップと、を備えることを特徴とする流量制御方法。 A steam supply method for pumping and supplying steam from a boiler device via a pipeline,
A flow rate adjusting valve for adjusting the steam flow rate of the pipeline, and means for measuring the flow rate flowing through the pipeline,
Obtaining a relationship between a steam supply flow rate (t / h) and a valve opening (%) based on a value of a predetermined valve pressure loss (MPa) in the flow regulating valve;
Determining the valve opening increased by giving a predetermined margin to the valve opening (%) as a valve follow-up opening (%) with respect to the steam supply flow rate (t / h);
And a step of controlling the valve opening degree of the flow rate adjusting valve to operate based on the valve follow-up opening degree (%).
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113687665A (en) * 2020-05-19 2021-11-23 华龙国际核电技术有限公司 Method and device for controlling water supply flow, electronic equipment and readable storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113687665A (en) * 2020-05-19 2021-11-23 华龙国际核电技术有限公司 Method and device for controlling water supply flow, electronic equipment and readable storage medium
CN113687665B (en) * 2020-05-19 2023-07-25 华龙国际核电技术有限公司 Method and device for controlling water supply flow, electronic equipment and readable storage medium

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