JP4294549B2 - Condensate recovery device - Google Patents

Condensate recovery device Download PDF

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JP4294549B2
JP4294549B2 JP2004208336A JP2004208336A JP4294549B2 JP 4294549 B2 JP4294549 B2 JP 4294549B2 JP 2004208336 A JP2004208336 A JP 2004208336A JP 2004208336 A JP2004208336 A JP 2004208336A JP 4294549 B2 JP4294549 B2 JP 4294549B2
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steam
condensate
condensate recovery
turbine
pump
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JP2006029670A (en
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高之 森井
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Tlv Co Ltd
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Tlv Co Ltd
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Description

本発明は、蒸気使用機器等で発生した蒸気の凝縮水としての復水を、ボイラー等へ回収する復水回収装置に関する。蒸気使用機器で発生する復水は一般にスチームトラップを介して外部に排出されるが、排出される復水は高温高圧蒸気の復水であって、まだ高温の熱エネルギーを多く有しており、この熱エネルギーの有効利用を図るために復水の回収が従来から行われている。   The present invention relates to a condensate recovery device that recovers condensate as condensate of steam generated in a steam-using device or the like to a boiler or the like. Condensate generated in steam-using equipment is generally discharged to the outside through a steam trap, but the discharged condensate is high-temperature and high-pressure steam condensate and still has a lot of high-temperature heat energy. In order to make effective use of this thermal energy, recovery of condensate has been conventionally performed.

従来の復水回収装置は、電動モータと連結した循環ポンプと、この循環ポンプの吐出口と吸込口を結ぶ密閉の循環通路と、循環通路の途中に配置したエゼクタ部材とで構成され、循環ポンプで循環通路とエゼクタ部材内に復水の一部を循環させることによって、スチームトラップから排出される復水を吸引して所定の回収先へポンプ圧送することができるものである。 A conventional condensate recovery apparatus includes a circulation pump connected to an electric motor, a sealed circulation passage connecting a discharge port and a suction port of the circulation pump, and an ejector member disposed in the middle of the circulation passage. Thus, by circulating a part of the condensate in the circulation passage and the ejector member, the condensate discharged from the steam trap can be sucked and pumped to a predetermined recovery destination.

上記従来の復水回収装置では、電動モータを駆動して循環ポンプを連続的に作動させ、循環通路内に所定量の復水を絶えず循環させなければならないために、電動モータの連続運転が必要となり、電気エネルギーを多量に消費してしまい、エネルギーの有効利用を図る上で問題があった。
特公昭６１−１８０３８号公報 In the conventional condensate recovery device, the electric motor is driven to continuously operate the circulation pump, and a predetermined amount of condensate must be continuously circulated in the circulation passage. Therefore, the electric motor needs to be continuously operated. As a result, a large amount of electric energy is consumed, and there is a problem in effectively using the energy.
Japanese Examined Patent Publication No. 61-18038

解決しようとする課題は、電動モータの連続運転を不用にして、電気エネルギーの消費を極力少なくすることによって、エネルギーの回収効率の高い復水回収装置を得ることである。   The problem to be solved is to obtain a condensate recovery device with high energy recovery efficiency by eliminating the continuous operation of the electric motor and minimizing the consumption of electric energy.

本発明は、蒸気使用機器で発生した復水を復水回収ポンプによりボイラーあるいは給水タンク等の復水回収先へ回収するものにおいて、復水回収ポンプを駆動する蒸気タービンを接続すると共に、復水回収ポンプの循環ポンプと蒸気タービンの間に誘導電動機を介在させて、当該誘導電動機は、蒸気タービンが循環ポンプの必要とする回転力以上の出力状態となった場合に、発電を開始して所定の電力を得るものである。 The present invention recovers condensate generated in steam-using equipment to a condensate recovery destination such as a boiler or a water supply tank using a condensate recovery pump, and connects a steam turbine that drives the condensate recovery pump and An induction motor is interposed between the circulation pump of the recovery pump and the steam turbine, and the induction motor starts power generation when the steam turbine is in an output state higher than the rotational force required by the circulation pump. To get the power .

本発明は、復水回収ポンプに蒸気タービンを接続したことにより、この蒸気タービンでもって循環ポンプを連続的に作動させることができ、電気エネルギーを使用することなく復水を回収することができる。   In the present invention, by connecting a steam turbine to the condensate recovery pump, the circulation pump can be continuously operated with this steam turbine, and the condensate can be recovered without using electric energy.

蒸気タービンとしては従来から使用されているものを用いることができ、単段あるいは多段式の背圧タービンや抽気タービン等を用いることができる。   As the steam turbine, those conventionally used can be used, and a single-stage or multi-stage back pressure turbine, an extraction turbine, or the like can be used.

図１において、エゼクタ１と循環通路２と循環ポンプ３と蒸気タービン４、及び、循環通路２から分岐した復水回収管５とで復水回収装置を構成する。   In FIG. 1, an ejector 1, a circulation path 2, a circulation pump 3, a steam turbine 4, and a condensate recovery pipe 5 branched from the circulation path 2 constitute a condensate recovery apparatus.

蒸気発生源としてのボイラー６と蒸気使用機器７を蒸気供給管８で接続する。蒸気供給管８には蒸気使用機器７へ供給する蒸気の圧力を制御する圧力制御弁９を取り付けると共に、蒸気タービン４へ駆動用の蒸気を供給するタービン蒸気供給管１０と、蒸気タービン４から蒸気を排出して蒸気使用機器７へ供給するタービン蒸気排出管１１をそれぞれ接続する。タービン蒸気供給管１０には、蒸気タービン４へ供給する蒸気量を制御する蒸気制御弁１２を取り付ける。   A boiler 6 as a steam generation source and a steam using device 7 are connected by a steam supply pipe 8. A pressure control valve 9 for controlling the pressure of the steam supplied to the steam using device 7 is attached to the steam supply pipe 8, a turbine steam supply pipe 10 that supplies driving steam to the steam turbine 4, and steam from the steam turbine 4. Are connected to turbine steam discharge pipes 11 that supply the steam to the steam-using device 7. A steam control valve 12 that controls the amount of steam supplied to the steam turbine 4 is attached to the turbine steam supply pipe 10.

蒸気使用機器７の下部にスチームトラップ１３を取り付ける。スチームトラップ１３は、蒸気使用機器７内で熱を奪われて凝縮した復水だけを排出し、一方、蒸気は排出することのない自動弁の一種である。スチームトラップ１３の出口側は管１４によってエゼクタ１の吸込室と接続する。   A steam trap 13 is attached to the lower part of the steam using device 7. The steam trap 13 is a kind of automatic valve that discharges only the condensed water that has been deprived of heat in the steam-using device 7 and does not discharge steam. The outlet side of the steam trap 13 is connected to the suction chamber of the ejector 1 by a pipe 14.

エゼクタ１の手前に配置した循環ポンプ３は、循環通路２側の流体を吸引してエゼクタ１側へ吐出するものであり、循環ポンプ３と蒸気タービン４の間には誘導電動機１５を介在させる。タービン蒸気供給管１０から蒸気タービン４へ供給される蒸気によって蒸気タービン４が回転駆動され、この回転力が誘導電動機１５を介して循環ポンプ３へ伝達される。なお、誘導電動機１５は、蒸気タービン４が循環ポンプ３の必要とする回転力以上の出力状態となった場合に、発電を開始して所定の電力を得ることができるものである。   The circulation pump 3 disposed in front of the ejector 1 sucks the fluid on the circulation passage 2 side and discharges it to the ejector 1 side. An induction motor 15 is interposed between the circulation pump 3 and the steam turbine 4. The steam turbine 4 is rotationally driven by the steam supplied from the turbine steam supply pipe 10 to the steam turbine 4, and this rotational force is transmitted to the circulation pump 3 via the induction motor 15. In addition, the induction motor 15 can start electric power generation and can obtain predetermined electric power, when the steam turbine 4 will be in the output state more than the rotational force which the circulation pump 3 requires.

循環ポンプ３からエゼクタ１へ復水が吐出されてエゼクタ１で吸引力を発生し、スチームトラップ１３から排出される復水を吸引して循環通路２内を循環する。循環通路２内の循環液量を必要最低限に維持しつつ復水回収管５に取り付けた制御弁１６の開度を制御して余剰復水をボイラー６へ回収する。 Condensate is discharged from the circulation pump 3 to the ejector 1 and a suction force is generated by the ejector 1, and the condensate discharged from the steam trap 13 is sucked and circulated in the circulation passage 2. Excess condensate is recovered in the boiler 6 by controlling the opening of the control valve 16 attached to the condensate recovery pipe 5 while maintaining the amount of circulating fluid in the circulation passage 2 to the minimum necessary.

蒸気タービン４を駆動して所定のエネルギーを消費した蒸気は、タービン蒸気排出管１１から蒸気供給管８で混合されて蒸気使用機器７内へ供給される。 The steam that consumes predetermined energy by driving the steam turbine 4 is mixed in the steam supply pipe 8 from the turbine steam discharge pipe 11 and supplied into the steam using device 7.

このように、蒸気タービン４の回転力によって循環ポンプ３を駆動することによって、電動モータを作動させる電気エネルギーは不要となり、エネルギーの回収効率を高めることが出来る。   Thus, by driving the circulation pump 3 by the rotational force of the steam turbine 4, no electric energy is required to operate the electric motor, and the energy recovery efficiency can be increased.

本発明の復水回収装置の実施例を示す構成図。The block diagram which shows the Example of the condensate collection | recovery apparatus of this invention.

符号の説明Explanation of symbols

１ エゼクタ
２ 循環通路
３ 循環ポンプ
４ 蒸気タービン
５ 復水回収管
６ ボイラー
７ 蒸気使用機器
８ 蒸気供給管
１０ タービン蒸気供給管
１１ タービン蒸気排出管
１３ スチームトラップ
１５ 誘導電動機
DESCRIPTION OF SYMBOLS 1 Ejector 2 Circulation passage 3 Circulation pump 4 Steam turbine 5 Condensate recovery pipe 6 Boiler 7 Steam use apparatus 8 Steam supply pipe 10 Turbine steam supply pipe 11 Turbine steam discharge pipe 13 Steam trap 15 Induction motor

Claims (1)

蒸気使用機器で発生した復水を復水回収ポンプによりボイラーあるいは給水タンク等の復水回収先へ回収するものにおいて、復水回収ポンプを駆動する蒸気タービンを接続すると共に、復水回収ポンプの循環ポンプと蒸気タービンの間に誘導電動機を介在させて、当該誘導電動機は、蒸気タービンが循環ポンプの必要とする回転力以上の出力状態となった場合に、発電を開始して所定の電力を得ることを特徴とする復水回収装置。 Condensate generated from steam-using equipment is collected by a condensate recovery pump to a condensate recovery destination such as a boiler or a water supply tank. A steam turbine that drives the condensate recovery pump is connected to the condensate recovery pump and An induction motor is interposed between the pump and the steam turbine, and the induction motor starts generating power and obtains predetermined power when the steam turbine is in an output state that exceeds the rotational force required by the circulation pump. A condensate recovery device characterized by that.
JP2004208336A 2004-07-15 2004-07-15 Condensate recovery device Expired - Fee Related JP4294549B2 (en)

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JP4294549B2 true JP4294549B2 (en) 2009-07-15

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Publication number Priority date Publication date Assignee Title
CN102425783B (en) * 2011-11-17 2013-09-18 北京中科华誉能源技术发展有限责任公司 Direct afterheat recycling system of water-cooled steam turbine for introducing steam exhaust into heat pump in tandem type
CN102537935B (en) * 2012-02-28 2013-08-14 西安交通大学 Heat regenerative system adopting jet-type heat pumps
CN105180149A (en) * 2015-09-28 2015-12-23 武汉长海高新技术有限公司 Emergent water replenishing device for boiler

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