JP2645766B2 - Power recovery system for steam supply line - Google Patents
Power recovery system for steam supply lineInfo
- Publication number
- JP2645766B2 JP2645766B2 JP16182791A JP16182791A JP2645766B2 JP 2645766 B2 JP2645766 B2 JP 2645766B2 JP 16182791 A JP16182791 A JP 16182791A JP 16182791 A JP16182791 A JP 16182791A JP 2645766 B2 JP2645766 B2 JP 2645766B2
- Authority
- JP
- Japan
- Prior art keywords
- steam
- flow rate
- power recovery
- load
- turbine
- 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 - Fee Related
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- Control Of Turbines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は蒸気供給ラインの動力回
収装置、詳しくは蒸気源と蒸気負荷との間の蒸気供給ラ
インから蒸気タービンにより動力回収するようにした動
力回収装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power recovery system for a steam supply line, and more particularly to a power recovery system for recovering power from a steam supply line between a steam source and a steam load by a steam turbine.
【０００２】[0002]
【従来の技術】従来、蒸気源を設備した蒸気消費工場に
おいて、蒸気源から蒸気負荷との間に設ける蒸気供給ラ
インには、第１流量調整弁（減圧弁）を介装した蒸気通
路とアキュムレータ及び第２流量調整弁（減圧弁）を介
装した蓄圧通路とを並設し、前記第１流量調整弁により
蒸気負荷側圧力（以下蒸気圧力という）を所定圧力（例
えば７Kg/cm2）に設定し、蒸気負荷の減少で蒸気圧力が
上昇したとき前記第１流量調整弁を絞り込んで蒸気圧力
を設定値に調整すると共に、前記アキュムレータに蓄圧
し、また、蒸気負荷の増大で蒸気圧力が低下したとき、
前記第２流量調整弁を開いて蓄圧した蒸気を流出するよ
うにしており、また、前記蒸気供給ラインに並設する前
記各通路には、動力回収用蒸気タービンを介装した動力
回収通路を並設し、前記蒸気タービンにより動力回収が
行えるようにしている。2. Description of the Related Art Conventionally, in a steam consuming plant equipped with a steam source, a steam supply line provided between a steam source and a steam load has a steam passage provided with a first flow control valve (pressure reducing valve) and an accumulator. And a pressure accumulating passage interposed with a second flow control valve (pressure reducing valve). A steam load side pressure (hereinafter referred to as a steam pressure) is set to a predetermined pressure (for example, 7 kg / cm 2 ) by the first flow control valve. When the steam pressure rises due to a decrease in steam load, the first flow control valve is throttled to adjust the steam pressure to a set value, and the pressure is accumulated in the accumulator, and the steam pressure decreases due to an increase in the steam load. When
The second flow control valve is opened to discharge the accumulated steam, and a power recovery passage provided with a power recovery steam turbine is provided in parallel with each of the passages arranged in parallel with the steam supply line. And power recovery can be performed by the steam turbine.
【０００３】[0003]
【発明が解決しようとする課題】所が以上の如くアキュ
ムレータを介装した蓄圧通路をもつ蒸気供給ラインにお
いて、この蓄圧通路に蒸気タービンをもつ動力回収路を
並設し、前記蒸気タービンにより動力回収する場合、前
記蒸気タービンには、蒸気負荷に対応した所定圧力、つ
まり、前記蒸気圧力が背圧として作用しており、また、
蒸気負荷が減少して蒸気流量が少なくなっても駆動され
るようになっていると共に、前記動力回収路とアキュム
レータを介装した蓄圧通路とは並設されているのである
から、蒸気流量が、蒸気タービンの出力が零となる無負
荷蒸気流量より少ない場合においても、蒸気タービンが
無負荷運転されて蒸気が消費され、前記アキュムレータ
での蓄圧が行えなかったり、また、蒸気流量が無負荷蒸
気流量より増大しても前記アキュムレータを介装した蓄
圧通路に蒸気が流れて前記蒸気タービンによる動力回収
の効率が悪くなったりする問題があった。As described above, in a steam supply line having a pressure accumulation passage with an accumulator interposed therein, a power recovery passage having a steam turbine is provided in parallel with the pressure accumulation passage, and power is recovered by the steam turbine. In this case, the steam turbine has a predetermined pressure corresponding to a steam load, that is, the steam pressure acts as a back pressure, and
Even when the steam load is reduced and the steam flow rate is reduced, the steam is driven, and the power recovery path and the accumulator passage provided with the accumulator are arranged side by side. Even when the output of the steam turbine is smaller than the no-load steam flow at which the output becomes zero, the steam turbine is operated under no load and the steam is consumed, and the accumulator cannot perform pressure accumulation. Even if it increases further, there is a problem that steam flows into the accumulator passage provided with the accumulator and the efficiency of power recovery by the steam turbine is reduced.
【０００４】即ち、蒸気タービンには背圧が作用してい
るため、例えば背圧７Kg/cm2においては、蒸気流量が5,
000Kg/h 以下で無負荷運転となり、出力（Ｋｗ) は零に
なるのであって、蒸気流量が無負荷蒸気流量より少ない
ときには動力回収はできないのであり、また、この無負
荷蒸気流量より蒸気流量が増大するときには、蒸気ター
ビンの蒸気消費量に比例して出力（Ｋｗ）が増大するの
である。That is, since a back pressure acts on the steam turbine, for example, when the back pressure is 7 kg / cm 2 , the steam flow rate is 5,
When the steam flow is less than the no-load steam flow, the power cannot be recovered when the steam flow is less than the no-load steam flow, and the steam flow is lower than the no-load steam flow. When it increases, the output (Kw) increases in proportion to the steam consumption of the steam turbine.
【０００５】従って、蒸気流量が無負荷蒸気流量より少
なくなる場合には蒸気タービンを運転しても無負荷運転
となって動力回収できないにも拘らず、無負荷運転して
いるため、つまり蒸気タービンで蒸気を消費しているた
めアキュムレータを備えながら蓄圧できないことになる
のであり、また一方、蒸気量が無負荷蒸気流量を越えて
動力回収ができる場合には、前記蒸気通路や蓄圧通路に
蒸気を流すと動力回収通路への蒸気流量が減少し、それ
だけ蒸気タービンの出力（Ｋｗ）が減少して動力回収の
効率が悪くなるのである。[0005] Therefore, when the steam flow rate is smaller than the no-load steam flow rate, the steam turbine is operated without load even though the steam turbine is operated, although no power can be recovered due to no-load operation. Therefore, if the amount of steam exceeds the no-load steam flow and power can be recovered, steam cannot be accumulated in the steam passage or the accumulation passage. When the steam flows, the steam flow rate to the power recovery passage decreases, and the output (Kw) of the steam turbine decreases accordingly, and the efficiency of power recovery deteriorates.
【０００６】本発明の目的は、蒸気負荷が小さく蒸気流
量が蒸気タービンの無負荷蒸気流量より少ない場合に
は、蒸気タービンの無負荷運転をなくしてアキュムレー
タでの蓄圧を可能とし、該アキュムレータを有効に利用
できながら、蒸気流量が蒸気タービンの無負荷流量を越
える場合には前記蒸気タービンによる動力回収を効率よ
く行える動力回収装置を提供する点にある。An object of the present invention is to eliminate the no-load operation of the steam turbine and to accumulate the pressure in the accumulator when the steam load is small and the steam flow rate is smaller than the no-load steam flow rate of the steam turbine. Another object of the present invention is to provide a power recovery device that can efficiently use the steam turbine when the steam flow rate exceeds the no-load flow rate of the steam turbine.
【０００７】また、他の目的は、蒸気負荷の減少で蒸気
タービンの運転が停止する場合でも、蒸気タービンの出
力側に設ける負荷の常時駆動を補償できる動力回収装置
を提供する点にあり、更に他の目的は、蒸気タービンの
出力側に設ける負荷の常時駆動を補償しながら、補償す
るために設ける電動モ−タが、蒸気タービンの出力によ
り、該モ−タの定格回転数を越えて発電機となるのを防
止でき、かつ、前記負荷を、該負荷に応じた必要回転数
で駆動させることのできる動力回収装置を提供する点に
ある。It is another object of the present invention to provide a power recovery apparatus capable of compensating for a constant drive of a load provided on the output side of a steam turbine even when the operation of the steam turbine is stopped due to a decrease in steam load. Another object of the present invention is to provide an electric motor provided to compensate while constantly driving a load provided on the output side of the steam turbine, and to generate electric power exceeding the rated rotation speed of the motor by the output of the steam turbine. Another object of the present invention is to provide a power recovery apparatus that can prevent the load from being used as a power source and can drive the load at a required rotation speed according to the load.
【０００８】[0008]
【課題を解決するための手段】本発明は、蒸気源１と蒸
気負荷２との間の蒸気供給ライン３に、第１流量調整弁
６を介装した蒸気通路７と、アキュムレータ８及び第２
流量調整弁９を介装した蓄圧通路１０とを並設すると共
に前記各通路７，１０に動力回収蒸気タービン１１を介
装した動力回収通路１２を並設し、前記蒸気タービン１
１により動力回収を可能にした動力回収装置において、
前記動力回収通路１１に開閉弁１３と第３流量調整弁１
４とを介装して、この第３流量調整弁１４により調整す
る前記蒸気供給ライン３の圧力設定を、前記第１及び第
２流量調整弁６，９により調整する前記蒸気供給ライン
３の圧力設定より高くする一方、前記動力回収通路１２
の蒸気流量を検出する第１流量検出器２２と、前記蒸気
供給ライン３の蒸気負荷側蒸気流量を検出する第２流量
検出器２３及び前記第１流量検出器２２の検出結果によ
り、前記動力回収通路１２の蒸気流量が、前記タービン
１１の無負荷蒸気流量より低下したとき、前記開閉弁１
３を閉じ、前記第２流量検出器２３の検出結果により前
記蒸気供給ライン３の蒸気流量が、前記タービン１１の
無負荷蒸気流量より増大したとき前記開閉弁１３を開く
コントロ−ラ２４とを設けたのである。The present invention provides a steam supply line 3 between a steam source 1 and a steam load 2, a steam passage 7 provided with a first flow control valve 6, an accumulator 8 and a second
A pressure recovery passage 10 provided with a flow control valve 9 is provided in parallel with a power recovery passage 12 provided with a power recovery steam turbine 11 in each of the passages 7, 10.
In the power recovery device that enabled power recovery by 1,
On-off valve 13 and third flow control valve 1 in power recovery passage 11
4, the pressure of the steam supply line 3 adjusted by the third flow control valve 14 is adjusted by the first and second flow control valves 6, 9. The power recovery passage 12
The power recovery is performed based on the detection results of the first flow rate detector 22 for detecting the steam flow rate of the steam, the second flow rate detector 23 for detecting the steam flow rate on the steam load side of the steam supply line 3, and the first flow rate detector 22. When the steam flow rate in the passage 12 is lower than the no-load steam flow rate in the turbine 11, the on-off valve 1
And a controller for opening the on-off valve when the steam flow rate of the steam supply line is greater than the no-load steam flow rate of the turbine based on the detection result of the second flow rate detector. It was.
【０００９】また、以上の構成において、前記蒸気ター
ビン１１の出力側に電動モ−タ２５を接続するのが好ま
しい。また、電動モ−タ２５を接続する場合、前記動力
回収蒸気タービン１１の回転数を検出する回転数検出器
２８を設け、前記タービン１１の回転数が、該タービン
１１の出力側に接続する電動モ−タ２５の定格回転数の
範囲内で設定する上限値Ｈを越えたとき、該モ−タ２５
の運転を停止するモ−タ運転制御手段３０を設けるのが
好ましい。In the above configuration, it is preferable to connect an electric motor 25 to the output side of the steam turbine 11. When the electric motor 25 is connected, a rotation speed detector 28 for detecting the rotation speed of the power recovery steam turbine 11 is provided, and the rotation speed of the turbine 11 is connected to the output side of the turbine 11. When the motor 25 exceeds the upper limit value H set within the range of the rated rotation speed of the motor 25,
It is preferable to provide a motor operation control means 30 for stopping the operation of the motor.
【００１０】[0010]
【作用】蒸気タービン１１の運転中、蒸気負荷が小さく
なり、この蒸気負荷での蒸気消費量が少なくなると、動
力回収通路１２の蒸気流量も減少するが、この蒸気流量
が前記蒸気タービン１１の無負荷蒸気流量より少なくな
って、蒸気タービン１１の出力（Ｋｗ）が零となるとき
には、前記第１流量検出器２２の検出結果により前記開
閉弁１３が閉じ、前記動力回収通路１２が遮断されるの
で、前記蒸気タービン１１の無負荷運転が防止される。When the steam load is reduced during the operation of the steam turbine 11 and the amount of steam consumed by the steam load is reduced, the steam flow rate in the power recovery passage 12 also decreases. When the output (Kw) of the steam turbine 11 becomes zero when the flow rate becomes smaller than the load steam flow rate, the on-off valve 13 is closed and the power recovery passage 12 is shut off according to the detection result of the first flow rate detector 22. Thus, no-load operation of the steam turbine 11 is prevented.
【００１１】従って、蒸気流量が少なく前記蒸気タービ
ン１１により動力回収できない場合には前記蒸気タービ
ン１１を停止して該蒸気タービン１１による蒸気消費を
なくすことができるため、前記アキュムレータ８での蓄
圧が可能となるのであって、前記アキュムレータ８を有
効に利用できるのである。Therefore, when the steam flow rate is so small that the power cannot be recovered by the steam turbine 11, the steam turbine 11 can be stopped and the steam consumption by the steam turbine 11 can be eliminated, so that the accumulator 8 can accumulate pressure. Thus, the accumulator 8 can be used effectively.
【００１２】また負荷が増大して蒸気流量が増し、前記
蒸気タービン１１の無負荷蒸気流量を越える場合には、
前記第２流量検出器２３の検出結果により前記開閉弁１
３が開き、前記蒸気タービン１１が駆動され動力回収が
行える。When the load increases and the steam flow rate increases and exceeds the no-load steam flow rate of the steam turbine 11,
According to the detection result of the second flow rate detector 23, the on-off valve 1
3, the steam turbine 11 is driven to recover power.
【００１３】この場合、前記開閉弁１３が開いた状態で
蒸気負荷の減少で蒸気圧力が上昇したとき、圧力設定を
前記第３流量調整弁１４より低くしている前記第１及び
第２流量調整弁６，９は閉じ、前記第３流量調整弁１４
のみが開き、蒸気圧力は、この第３流量調整弁１４の圧
力設定に調整されるのであって、前記蒸気タービン１１
がアキュムレータ８に優先して運転されることになる。In this case, when the steam pressure rises due to a decrease in steam load with the on-off valve 13 open, the first and second flow rate adjustments are performed by setting the pressure lower than that of the third flow rate adjustment valve 14. The valves 6 and 9 are closed and the third flow control valve 14 is closed.
Is opened, and the steam pressure is adjusted to the pressure setting of the third flow control valve 14.
Is operated in preference to the accumulator 8.
【００１４】このため、前記蒸気タービン１１による動
力回収の効率をそれだけ向上できるのである。Therefore, the efficiency of power recovery by the steam turbine 11 can be improved accordingly.
【００１５】また、蒸気負荷が更に減少し、蒸気流量が
前記タービン１１の無負荷蒸気流量より減少する場合、
前記コントローラ２４により前記開閉弁１３が閉じる。
この場合、蒸気圧力は低下するから、先ず前記第２流量
調整弁９が開き、アキュムレータ８で蓄圧した蒸気を放
出できる。When the steam load further decreases and the steam flow rate becomes lower than the no-load steam flow rate of the turbine 11,
The on-off valve 13 is closed by the controller 24.
In this case, since the steam pressure decreases, first, the second flow control valve 9 is opened, and the steam accumulated by the accumulator 8 can be discharged.
【００１６】前記開閉弁１３が閉じることにより、前記
蒸気タービン１１は停止するが、該蒸気タービン１１の
出力側に電動モ−タ２５を接続することにより、前記蒸
気タービン１１が停止しても、該蒸気タービン１１の出
力側に設ける例えば冷凍機の圧縮機や、ポンプ或はファ
ンなどの負荷の常時駆動を補償できる。When the on-off valve 13 is closed, the steam turbine 11 is stopped. However, when the electric motor 25 is connected to the output side of the steam turbine 11, even if the steam turbine 11 is stopped, The constant drive of a load such as a compressor of a refrigerator or a pump or a fan provided on the output side of the steam turbine 11 can be compensated.
【００１７】また、前記蒸気負荷が大きいときに蒸気タ
ービン１１が運転される場合、この蒸気タービン１１の
出力が増大し、該モ−タ２５がその定格回転数より大き
くなると、該モ−タ２５は発電機となるが、前記蒸気タ
ービン１１の回転数が、前記モ−タ２５の定格回転数の
範囲内で設定する上限値Ｈを越えるとき前記モ−タ２５
の運転を停止するモ−タ運転制御手段３０を設けること
により前記モ−タ２５が発電機となるのを防止できるの
であって、前記モ−タ２５を用いながら、該モ−タ２５
が発電機になることなく負荷に必要な回転数での駆動が
可能となるのである。Further, when the steam turbine 11 is operated when the steam load is large, the output of the steam turbine 11 increases, and when the motor 25 exceeds its rated speed, the motor 25 Is a generator. When the rotation speed of the steam turbine 11 exceeds an upper limit H set within the range of the rated rotation speed of the motor 25, the motor 25
By providing the motor operation control means 30 for stopping the operation of the motor 25, it is possible to prevent the motor 25 from becoming a generator.
Can be driven at the required number of revolutions for the load without becoming a generator.
【００１８】[0018]
【実施例】図１に示した実施例は、ボイラーから成る蒸
気源１と蒸気を消費して仕事をする蒸気負荷２との間の
蒸気供給ライン３に高圧ヘッダー４と低圧ヘッダー５と
を介して第１流量調整弁６を介装した蒸気通路７と、ア
キュムレータ８及び第２流量調整弁９を介装した蓄圧通
路１０とを並設すると共に、これら各通路７，１０に、
動力回収用蒸気タービン１１を介装した動力回収通路１
２を並設し、この動力回収通路１２に開閉弁１３と第３
流量調整弁１４とを介装して前記開閉弁１３の開時、前
記蒸気タービン１１により動力回収を可能にしたもの
で、前記各流量調整弁６，９，１４を介装する各通路
７，１０，１２には、これら各流量調整弁６，９，１４
の二次側の蒸気圧力を検出する圧力検出器１５，１６，
１７を設けており、これら圧力検出器１５，１６，１７
の検出結果に基づき、予め設定する設定圧力との比較で
前記各流量調整弁６，９，１４に開度指令を出力する開
度指示器１８，１９，２０を設け、前記蒸気供給ライン
３の蒸気負荷側における蒸気圧力を前記所定圧力に調整
するようにしている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 has a high-pressure header 4 and a low-pressure header 5 connected to a steam supply line 3 between a steam source 1 consisting of a boiler and a steam load 2 consuming steam and performing work. A steam passage 7 having a first flow control valve 6 interposed therein and a pressure accumulating passage 10 having an accumulator 8 and a second flow control valve 9 interposed therebetween are arranged side by side.
Power recovery passage 1 with power recovery steam turbine 11 interposed
The power recovery passage 12 has an on-off valve 13 and a third
When the on-off valve 13 is opened with the flow control valve 14 interposed therebetween, power can be recovered by the steam turbine 11, and each of the passages 7, with the flow control valves 6, 9, 14 interposed therebetween, The flow control valves 6, 9, 14 are provided in 10 and 12 respectively.
Pressure detectors 15, 16 for detecting the steam pressure on the secondary side of
17 are provided, and these pressure detectors 15, 16, 17 are provided.
Based on the detection result, opening degree indicators 18, 19, and 20 for outputting opening instructions to the flow rate regulating valves 6, 9, and 14 by comparison with a preset pressure are provided. The steam pressure on the steam load side is adjusted to the predetermined pressure.
【００１９】尚、図１の実施例においては、前記第１，
第２流量調整弁６，９は減圧弁から成り、前記開度指示
器１８，１９からの開度指令による開度調整で高圧ヘッ
ダー４から導く高圧蒸気（例えば１４Kg/cm2）を、前記
各開度指示器１８，１９で設定する所望の設定圧力に減
圧し、低圧ヘッダー５から蒸気負荷２に通ずる蒸気負荷
側における蒸気圧力を、前記設定圧力に調整するように
しており、また、第３流量調整弁１４は調整弁から成
り、前記開度指示器２０で設定する設定圧力をもとに前
記蒸気タービン１１を調速し、蒸気負荷側における蒸気
圧力を前記設定圧力に調整するようにしている。図１に
おいて２１はガバナーである。Incidentally, in the embodiment of FIG.
The second flow control valve 6 and 9 is made of a pressure reducing valve, the high pressure steam derived from the high-pressure header 4 in the opening adjustment by opening command from the position indicator 18 and 19 (e.g. 14 kg / cm 2), each The pressure is reduced to a desired set pressure set by the opening degree indicators 18 and 19, and the steam pressure on the steam load side from the low-pressure header 5 to the steam load 2 is adjusted to the set pressure. The flow rate regulating valve 14 is composed of a regulating valve, regulates the speed of the steam turbine 11 based on the set pressure set by the opening degree indicator 20, and adjusts the steam pressure on the steam load side to the set pressure. I have. In FIG. 1, reference numeral 21 denotes a governor.
【００２０】しかして以上の構成において、前記各開度
指示器１８，１９，２０で設定する設定圧力は、前記第
１流量調整弁６の設定圧力Ｐ1 が最も低い例えば６．５
Kg/cm2とし、第２流量調整弁９の設定圧力Ｐ2 を前記設
定圧力Ｐ1 より高い例えば６．７５Kg/cm2とし、更に第
３流量調整弁１４の設定圧力Ｐ3 を最も高い例えば７Kg
/cm2とするのである。[0020] Thus the above configuration, the setting pressure set by the opening indicator 18, 19, 20, the set pressure P 1 is the lowest for example 6.5 of the first flow rate regulation valve 6
Kg / cm 2 , the set pressure P 2 of the second flow control valve 9 is set to be higher than the set pressure P 1 , for example, 6.75 kg / cm 2, and the set pressure P 3 of the third flow control valve 14 is set to be the highest, for example. 7kg
/ cm 2 .
【００２１】そして、前記動力回収通路１２には、該動
力回収通路１２の蒸気流量を検出する第１流量検出器２
２を設け、また、前記蒸気供給ライン３の蒸気負荷側、
つまり前記低圧ヘッダー５の二次側には、蒸気負荷側蒸
気流量を検出する第２流量検出器２３を設けると共に、
前記第１流量検出器２２の検出結果により、前記動力回
収通路１２の蒸気流量が前記タービン１１の無負荷蒸気
流量より低下したとき、前記開閉弁１３を閉じ、また、
前記第２流量検出器２３の検出結果により、前記低圧ヘ
ッダー５の二次側における蒸気流量が前記タービン１１
の無負荷蒸気流量より増大したとき、前記開閉弁１３を
開くコントロ−ラ２４を設けるのである。The power recovery passage 12 has a first flow rate detector 2 for detecting a steam flow rate in the power recovery passage 12.
2 and a steam load side of the steam supply line 3;
That is, on the secondary side of the low-pressure header 5, the second flow rate detector 23 for detecting the steam flow rate on the steam load side is provided,
According to the detection result of the first flow rate detector 22, when the steam flow rate of the power recovery passage 12 is lower than the no-load steam flow rate of the turbine 11, the on-off valve 13 is closed,
According to the detection result of the second flow rate detector 23, the steam flow rate on the secondary side of the low pressure
A controller 24 is provided to open the on-off valve 13 when the flow rate of the steam exceeds the no-load steam flow.
【００２２】前記無負荷蒸気流量は、前記第３流量調整
弁１４の開度指示器２０で設定する前記設定圧力Ｐ3 に
より、換言すると前記タービン１１の背圧により決まる
もので、前記設定圧力Ｐ3 を前記したように７Kg/cm2に
した場合、図２に示した蒸気消費量（Kg/h）と出力（Ｋ
ｗ）との特性を示すウイランス線から明らかな通り、蒸
気消費量が約5,000Kg/h で出力零となるのであるから、
無負荷蒸気流量は、5,000Kg/h となるのである。この場
合、前記開閉弁１３の開閉は、ディファレンシャルをと
り、例えば5,000Kg/h で閉じ、例えば6,000Kg/h で開く
ようにするのが好ましい。The no-load steam flow is determined by the set pressure P 3 set by the opening indicator 20 of the third flow control valve 14, in other words, by the back pressure of the turbine 11. When 3 is set to 7 kg / cm 2 as described above, the steam consumption (Kg / h) and the output (K
w), the output becomes zero at about 5,000Kg / h, as is clear from the Willans line showing the characteristic of
The no-load steam flow is 5,000 kg / h. In this case, it is preferable to open and close the on-off valve 13 by taking a differential and closing it at, for example, 5,000 kg / h and opening it at, for example, 6,000 kg / h.
【００２３】次に以上の如く構成する動力回収装置の作
用を説明する。Next, the operation of the power recovery apparatus configured as described above will be described.
【００２４】先ず蒸気タービン１１の運転中、蒸気負荷
が小さくなり、この蒸気負荷２での蒸気消費量が少なく
なると、動力回収通路１２の蒸気流量も減少する。そし
て、この蒸気流量が前記蒸気タービン１１の無負荷蒸気
流量より少なくなると、前記第１流量検出器２２の検出
結果に基づき前記コントロ−ラ２４からの指示で前記開
閉弁１３が閉じ、前記タービン１１の無負荷運転が防止
されるのである。First, during the operation of the steam turbine 11, the steam load decreases, and when the steam consumption at the steam load 2 decreases, the steam flow rate in the power recovery passage 12 also decreases. When the steam flow rate becomes lower than the no-load steam flow rate of the steam turbine 11, the on-off valve 13 is closed by an instruction from the controller 24 based on the detection result of the first flow rate detector 22, and the turbine 11 No-load operation is prevented.
【００２５】従って、蒸気流量が少なく、前記蒸気ター
ビン１１が無負荷運転となって動力回収できない場合に
は、前記動力回収通路１２を遮断し、前記蒸気タービン
１１による蒸気消費をなくすことができるのであるか
ら、前記アキュムレータ８での蓄圧が可能となるのであ
って、該アキュムレータ８を有効に利用できるのであ
る。Therefore, when the steam flow rate is small and the steam turbine 11 is in a no-load operation and power cannot be recovered, the power recovery passage 12 is shut off, so that steam consumption by the steam turbine 11 can be eliminated. Therefore, the accumulator 8 can accumulate the pressure, and the accumulator 8 can be used effectively.
【００２６】即ち、前記開閉弁１３が閉じる場合、蒸気
負荷が小さいため蒸気負荷側の蒸気圧力は上昇すること
になるが、前記第１流量調整弁６の設定圧力Ｐ1 より第
２流量調整弁９の設定圧力Ｐ2 の方が高いため、前記第
１流量調整弁６が先に全閉し、前記アキュムレータ８に
蓄圧されることになるのである。That is, when the on-off valve 13 is closed, the steam pressure on the steam load side rises because the steam load is small, but the second flow rate regulating valve is set at a pressure higher than the set pressure P 1 of the first flow rate regulating valve 6. Since the set pressure P 2 of 9 is higher, the first flow rate control valve 6 is fully closed first, and the pressure is accumulated in the accumulator 8.
【００２７】次に前記蒸気負荷２での蒸気消費量が増
し、蒸気流量が増大して前記蒸気タービン１１の無負荷
蒸気流量を越える場合には、前記第２流量検出器２３の
検出結果に基づく前記コントロ−ラ２４の指示により前
記開閉弁１３が開き、この開動作により前記蒸気タービ
ン１１が駆動され動力回収が行えるのである。Next, when the amount of steam consumed by the steam load 2 increases and the steam flow rate increases to exceed the no-load steam flow rate of the steam turbine 11, it is based on the detection result of the second flow rate detector 23. The on-off valve 13 opens according to an instruction from the controller 24, and the opening operation drives the steam turbine 11 to recover power.
【００２８】この場合、前記開閉弁１３が開いた状態で
蒸気負荷の減少で蒸気圧力が増大すると、圧力設定の最
も低い第１流量調整弁６が先ず全閉し、次に第２流量調
整弁９が全閉し、第３流量調整弁１４のみが開くことに
なり、蒸気流量は全量が動力回収通路１２に流れ、アキ
ュムレータ８に優先して蒸気タービン１１が運転される
ことになり、この蒸気タービン１１による動力回収の効
率を向上できるのである。In this case, if the steam pressure increases due to a decrease in the steam load while the on-off valve 13 is open, the first flow control valve 6 having the lowest pressure setting is first fully closed, and then the second flow control valve is set. 9 is completely closed, and only the third flow control valve 14 is opened, and the entire steam flow rate flows into the power recovery passage 12, and the steam turbine 11 is operated prior to the accumulator 8. The efficiency of power recovery by the turbine 11 can be improved.
【００２９】この場合、前記蒸気供給ライン３の蒸気圧
力は、前記第３流量調整弁１４の設定圧力（７Kg/cm2）
に調整される。In this case, the steam pressure in the steam supply line 3 is equal to the set pressure of the third flow control valve 14 (7 kg / cm 2 ).
It is adjusted to.
【００３０】また、以上の状態から蒸気負荷が増大する
と蒸気圧力は低下するのであるから、前記第３流量調整
弁１４が全開している状態で先ず第２流量調整弁９が開
き、アキュムレータ８で蓄圧した蒸気を放出できるので
ある。Since the steam pressure decreases when the steam load increases from the above state, the second flow control valve 9 is first opened with the third flow control valve 14 fully opened, and the accumulator 8 The accumulated steam can be released.
【００３１】そして、前記蒸気負荷が更に増大して、蒸
気圧力が低下すると第１流量調整弁６が開き、前記蒸気
通路７から蒸気が流れることになる。When the steam load further increases and the steam pressure decreases, the first flow control valve 6 opens, and steam flows from the steam passage 7.
【００３２】所で、図１に示した実施例では、前記蒸気
タービン１１の出力側に電動モ−タ２５をクラッチ２６
を介して接続し、該モ−タ２５により前記蒸気タービン
１１のバックアップを行い、前記蒸気タービン１１の出
力側に接続する例えば冷凍機の圧縮機やポンプ或はファ
ンなどの負荷２７の常時駆動を補償している。In the embodiment shown in FIG. 1, an electric motor 25 is connected to the output side of the steam turbine 11 by a clutch 26.
And a backup of the steam turbine 11 by the motor 25, and constantly drives a load 27 such as a compressor, a pump or a fan of a refrigerator connected to the output side of the steam turbine 11. Compensated.
【００３３】従って、蒸気流量が減少し、前記第１流量
検出器２２の検出結果に基づき前記開閉弁１３が閉じ
て、前記タービン１１の運転が停止しても、前記負荷２
７は前記モ−タ２５により駆動されるのであって、蒸気
負荷２の変動で駆動を停止されるのを防止できるのであ
る。Therefore, even if the steam flow rate decreases and the on-off valve 13 closes based on the detection result of the first flow rate detector 22 and the operation of the turbine 11 stops, the load 2
The motor 7 is driven by the motor 25, and can be prevented from being stopped due to the fluctuation of the steam load 2.
【００３４】また、前記モ−タ２５を用いる場合、図１
に示したように前記蒸気タービン１１の回転数を検出す
る回転数検出器２８を設け、前記タービン１１の出力が
増大して、その回転数が、例えば前記モ−タ２５の定格
回転数を越えるような回転数を上限値Ｈとして前記モ−
タ２５の運転を停止し、前記タービン１１の出力が減少
し前記モ−タ１１の定格回転数より小さくなる回転数を
下限値Ｌとして前記モ−タ２５の運転を開始する開閉ス
イッチ３０ａをもったモ−タ運転制御手段３０を設ける
のが好ましい。When the motor 25 is used, FIG.
As shown in the figure, a rotation speed detector 28 for detecting the rotation speed of the steam turbine 11 is provided, and the output of the turbine 11 increases, and the rotation speed exceeds, for example, the rated rotation speed of the motor 25. The rotation speed is set as the upper limit value H and the motor
The motor 25 has an open / close switch 30a for stopping the operation of the motor 25 and starting the operation of the motor 25 with the lower limit value L being the rotation speed at which the output of the turbine 11 decreases and becomes lower than the rated rotation speed of the motor 11. Preferably, a motor operation control means 30 is provided.
【００３５】この場合、前記蒸気負荷２が小さく、前記
蒸気タービン１１により動力回収しているとき、この蒸
気タービン１１の出力が増大しても、前記モ−タ２５が
その定格回転数を越えて回転し発電機になるのを防止で
きるし、前記負荷２７に応じた必要回転数での駆動が可
能となるのである。In this case, when the steam load 2 is small and the power is recovered by the steam turbine 11, even if the output of the steam turbine 11 increases, the motor 25 exceeds the rated speed. It is possible to prevent the generator from rotating and becoming a generator, and it is possible to drive at a required rotation speed according to the load 27.
【００３６】尚、前記モ−タ２５の運転を停止する上限
値Ｈは、前記モ−タ２５の定格回転数を基準に設定する
以外、定格回転数の範囲内で、前記負荷２７に応じて必
要な回転数を基準に設定してもよい。The upper limit value H at which the operation of the motor 25 is stopped is set in accordance with the load 27 within the range of the rated speed, except that the upper limit H is set based on the rated speed of the motor 25. The required rotation speed may be set as a reference.
【００３７】又、以上説明した実施例において、前記第
３流量調整弁１４を調速弁を利用して構成したが、調速
弁とは別に設けてもよいし、調速弁の代わりに設けても
よい。In the embodiment described above, the third flow control valve 14 is constituted by using a speed control valve. However, it may be provided separately from the speed control valve, or may be provided instead of the speed control valve. You may.
【００３８】[0038]
【発明の効果】本発明は以上の如く蒸気源１と蒸気負荷
２との間の蒸気供給ライン３に、第１流量調整弁６を介
装した蒸気通路７と、アキュムレータ８及び第２流量調
整弁９を介装した蓄圧通路１０とを並設すると共に前記
各通路７，１０に動力回収蒸気タービン１１を介装した
動力回収通路１２を並設し、前記蒸気タービン１１によ
り動力回収を可能にした動力回収装置において、前記動
力回収通路１２に開閉弁１３と第３流量調整弁１４とを
介装して、この第３流量調整弁１４により調整する前記
蒸気供給ライン３の圧力設定を、前記第１及び第２流量
調整弁６，９により調整する前記蒸気供給ライン３の圧
力設定より高くする一方、前記動力回収通路１２の蒸気
流量を検出する第１流量検出器２２と、前記蒸気供給ラ
イン３の蒸気負荷側蒸気流量を検出する第２流量検出器
２３及び前記第１流量検出器２２の検出結果により、前
記動力回収通路１２の蒸気流量が、前記タービン１１の
無負荷蒸気流量より低下したとき、前記開閉弁１３を閉
じ、前記第２流量検出器２３の検出結果により前記蒸気
供給ライン３の蒸気流量が、前記タービン１１の無負荷
蒸気流量より増大したとき前記開閉弁１３を開くコント
ロ−ラ２４とを設けたことにより、蒸気負荷が小さく蒸
気流量が蒸気タービン１１の無負荷流量より少ない場合
には、前記開閉弁１３を閉じて前記蒸気タービン１１の
無負荷運転を防止できるのであって、アキュムレータ８
での蓄圧を可能にし、該アキュムレータ８を有効に利用
できるのである。According to the present invention, as described above, the steam supply line 3 between the steam source 1 and the steam load 2, the steam passage 7 having the first flow control valve 6 interposed, the accumulator 8 and the second flow control A pressure storage passage 10 with a valve 9 interposed is arranged in parallel, and a power recovery passage 12 with a power recovery steam turbine 11 interposed in each of the passages 7 and 10 to enable power recovery by the steam turbine 11. In this power recovery device, an on-off valve 13 and a third flow control valve 14 are interposed in the power recovery passage 12, and the pressure setting of the steam supply line 3 adjusted by the third flow control valve 14 is A first flow rate detector 22 for detecting a steam flow rate in the power recovery passage 12 while the pressure is set higher than a pressure setting of the steam supply line 3 adjusted by first and second flow rate adjustment valves 6 and 9; 3 steam load When the steam flow rate of the power recovery passage 12 falls below the unloaded steam flow rate of the turbine 11 based on the detection results of the second flow rate detector 23 and the first flow rate detector 22 for detecting the steam flow rate, the on-off valve A controller for closing the valve and opening the on-off valve when the steam flow in the steam supply line exceeds the no-load steam flow of the turbine based on the detection result of the second flow detector; Accordingly, when the steam load is small and the steam flow rate is smaller than the no-load flow rate of the steam turbine 11, the on-off valve 13 can be closed to prevent no-load operation of the steam turbine 11, and the accumulator 8
Thus, the accumulator 8 can be effectively used.
【００３９】その上、蒸気負荷が増し、蒸気流量が蒸気
タービン１１の無負荷蒸気流量を越える場合には、前記
開閉弁１３を開き、前記蒸気タービン１１を運転させ、
該タービン１１による動力回収が行えるのであり、しか
もこの場合には、前記第１及びひ第２流量調整弁６，９
を閉じ、前記第３流量調整弁１４のみを開いて前記蒸気
タービン１１による動力回収が行えるから、換言する
と、アキュムレータ８に優先して動力回収が行えるか
ら、動力回収の効率を向上できるのである。In addition, when the steam load increases and the steam flow exceeds the no-load steam flow of the steam turbine 11, the on-off valve 13 is opened to operate the steam turbine 11,
Power can be recovered by the turbine 11, and in this case, the first and second flow control valves 6, 9
And the power recovery by the steam turbine 11 can be performed by opening only the third flow control valve 14, in other words, the power recovery can be performed prior to the accumulator 8, so that the efficiency of power recovery can be improved.
【００４０】また、前記蒸気タービン１１の出力側に電
動モ−タ２５を接続する場合には、蒸気負荷の減少で蒸
気タービン１１の運転が停止する場合でも、前記蒸気タ
ービン１１の出力側に設ける冷凍機などの負荷２７の常
時駆動を補償できるのである。When the electric motor 25 is connected to the output side of the steam turbine 11, it is provided on the output side of the steam turbine 11 even when the operation of the steam turbine 11 is stopped due to a decrease in steam load. The constant drive of the load 27 such as a refrigerator can be compensated.
【００４１】更に、前記モ−タ２５を用いる場合、前記
蒸気タービン１１の回転数を検出する回転数検出器２８
を設けると共に、前記蒸気タービン１１の回転数が、前
記モ−タ２５の定格回転数の範囲内で設定する上限値Ｈ
を越えるとき、前記モ−タ２５の運転を停止するモ−タ
運転制御手段３０を設けることにより、前記蒸気タービ
ン１１の出力が増大し、前記蒸気タービン１１の回転数
が前記モ−タ２５の定格回転数を越えても、前記モ−タ
２５が発電機になるのを防止できるし、また、前記負荷
２７に応じた必要回転数での駆動が可能となるのであ
る。Further, when the motor 25 is used, a rotation speed detector 28 for detecting the rotation speed of the steam turbine 11 is used.
And the upper limit H of the rotation speed of the steam turbine 11 set within the range of the rated rotation speed of the motor 25.
Is provided, the motor operation control means 30 for stopping the operation of the motor 25 is provided, so that the output of the steam turbine 11 is increased, and the rotation speed of the steam turbine 11 is reduced. Even if the rated speed is exceeded, the motor 25 can be prevented from becoming a generator, and can be driven at a required speed according to the load 27.
【図１】本発明の一実施例を示す配管系統図。FIG. 1 is a piping system diagram showing one embodiment of the present invention.
【図２】無負荷蒸気消費量と出力との特性を示すウイラ
ンス線図。FIG. 2 is a Willance diagram showing characteristics of a no-load steam consumption and an output.
１ 蒸気源 ２ 蒸気負荷 ３ 蒸気供給ライン ６ 第１流量調整弁 ７ 蒸気通路 ９ 第２流量調整弁 １０ 蓄圧通路 １１ 蒸気タービン １２ 動力回収通路 １３ 開閉弁 １４ 第３流量調整弁 ２２ 第１流量検出器 ２３ 第２流量検出器 ２４ コントロ−ラ ２５ 電動モ−タ ２７ 負荷 ２８ 回転数検出器 ３０ モ−タ運転制御手段 DESCRIPTION OF SYMBOLS 1 Steam source 2 Steam load 3 Steam supply line 6 1st flow regulating valve 7 Steam passage 9 2nd flow regulating valve 10 Accumulation passage 11 Steam turbine 12 Power recovery passage 13 Opening / closing valve 14 3rd flow regulating valve 22 First flow detector 23 Second Flow Detector 24 Controller 25 Electric Motor 27 Load 28 Speed Detector 30 Motor Operation Control Means
Claims (3)
ライン３に、第１流量調整弁６を介装した蒸気通路７
と、アキュムレータ８及び第２流量調整弁９を介装した
蓄圧通路１０とを並設すると共に前記各通路７，１０に
動力回収蒸気タービン１１を介装した動力回収通路１２
を並設し、前記蒸気タービン１１により動力回収を可能
にした動力回収装置において、前記動力回収通路１２に
開閉弁１３と第３流量調整弁１４とを介装して、この第
３流量調整弁１４により調整する前記蒸気供給ライン３
の圧力設定を、前記第１及び第２流量調整弁６，９によ
り調整する前記蒸気供給ライン３の圧力設定より高くす
る一方、前記動力回収通路１２の蒸気流量を検出する第
１流量検出器２２と、前記蒸気供給ライン３の蒸気負荷
側蒸気流量を検出する第２流量検出器２３及び前記第１
流量検出器２２の検出結果により、前記動力回収通路１
２の蒸気流量が、前記タービン１１の無負荷蒸気流量よ
り低下したとき、前記開閉弁１３を閉じ、前記第２流量
検出器２３の検出結果により前記蒸気供給ライン３の蒸
気流量が、前記タービン１１の無負荷蒸気流量より増大
したとき前記開閉弁１３を開くコントロ−ラ２４とを設
けていることを特徴とする蒸気供給ラインの動力回収装
置。1. A steam passage (7) having a first flow control valve (6) interposed in a steam supply line (3) between a steam source (1) and a steam load (2).
And a pressure recovery passage 10 in which an accumulator 8 and a second flow control valve 9 are interposed, and a power recovery passage 12 in which a power recovery steam turbine 11 is interposed in each of the passages 7, 10.
In the power recovery apparatus in which power recovery is enabled by the steam turbine 11, an on-off valve 13 and a third flow control valve 14 are interposed in the power recovery passage 12, and the third flow control valve The steam supply line 3 adjusted by 14
Is set higher than the pressure setting of the steam supply line 3 adjusted by the first and second flow control valves 6 and 9, while the first flow detector 22 detects the steam flow rate of the power recovery passage 12. A second flow rate detector 23 for detecting a steam flow rate on the steam load side of the steam supply line 3;
According to the detection result of the flow rate detector 22, the power recovery passage 1
When the steam flow rate of the steam supply line 2 is lower than the no-load steam flow rate of the turbine 11, the on-off valve 13 is closed, and the steam flow rate of the steam supply line 3 is reduced based on the detection result of the second flow rate detector 23. And a controller 24 for opening the on-off valve 13 when the flow rate exceeds the no-load steam flow rate.
動モ−タ２５を接続している請求項１記載の蒸気供給ラ
インの動力回収装置。2. The power recovery apparatus for a steam supply line according to claim 1, wherein an electric motor is connected to an output side of the power recovery steam turbine.
出する回転数検出器２８を設け、前記タービン１１の回
転数が、該タービン１１の出力側に接続する電動モ−タ
２５の定格回転数の範囲内で設定する上限値Ｈを越えた
とき、該モ−タ２５の運転を停止するモ−タ運転制御手
段３０を設けている請求項２記載の蒸気供給ラインの動
力回収装置。3. A rotating speed detector 28 for detecting the rotating speed of the power recovery steam turbine 11, wherein the rotating speed of the turbine 11 is the rated rotating speed of the electric motor 25 connected to the output side of the turbine 11. 3. A power recovery system for a steam supply line according to claim 2, further comprising a motor operation control means for stopping the operation of said motor when an upper limit value H set within the range is exceeded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16182791A JP2645766B2 (en) | 1991-07-02 | 1991-07-02 | Power recovery system for steam supply line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16182791A JP2645766B2 (en) | 1991-07-02 | 1991-07-02 | Power recovery system for steam supply line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0642308A JPH0642308A (en) | 1994-02-15 |
| JP2645766B2 true JP2645766B2 (en) | 1997-08-25 |
Family
ID=15742672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16182791A Expired - Fee Related JP2645766B2 (en) | 1991-07-02 | 1991-07-02 | Power recovery system for steam supply line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2645766B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2899787T3 (en) | 2015-03-05 | 2022-03-14 | Equalaire Systems Inc | Tire inflation system for a steering axle |
-
1991
- 1991-07-02 JP JP16182791A patent/JP2645766B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0642308A (en) | 1994-02-15 |
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