JP2009127568A - Sealing water collection system and power generation facility including same - Google Patents

Sealing water collection system and power generation facility including same Download PDF

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JP2009127568A
JP2009127568A JP2007304964A JP2007304964A JP2009127568A JP 2009127568 A JP2009127568 A JP 2009127568A JP 2007304964 A JP2007304964 A JP 2007304964A JP 2007304964 A JP2007304964 A JP 2007304964A JP 2009127568 A JP2009127568 A JP 2009127568A
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water
water recovery
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JP5121418B2 (en
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Hiroyuki Nagaoka
洋行 長岡
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing water collection system capable of collecting sealing water into a condenser even during failure of a sealing water pump. <P>SOLUTION: This system includes a sealing water collection tank 1 storing sealing water collected from each section of a generator set, a sealing water collecting pump 2 disposed in a middle of a sealing water collection conduit 3 providing communication between the sealing water collection tank 1 and the condenser 5 and supplying sealing water collected to the sealing water collection tank 1 to the condenser 5 via the sealing water collection conduit 3 by drive, and a bypass conduit 6 bypassing the sealing water collection pump 2 and providing communication between the sealing water collection tank 1 and the sealing water collection conduit 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は封水回収システムおよびこれを有する発電設備に関し、特に汽水発電設備に適用して有用なものである。   The present invention relates to a sealed water recovery system and a power generation facility having the same, and is particularly useful when applied to a brackish water power generation facility.

蒸気タービンを原動機として発電機を駆動する汽力発電システムでは、前記蒸気タービンで仕事をした蒸気は凝縮されて復水器で水に戻り、復水ポンプの駆動により復水系を介して再度ボイラ等の蒸気発生手段に供給される。一方、かかる汽水発電システムでは蒸気タービン等、当該発電設備の各種回転機器の回転軸のシールに封水を利用している。図４に示すように、かかる用途に供される封水は、当該発電設備の各所から封水回収タンク１に集積される。そして、封水回収タンク１に集積された封水は、封水回収ポンプ２の駆動により封水回収管路３及び封水弁４を介して復水器５に供給される。   In a steam power generation system in which a generator is driven using a steam turbine as a prime mover, the steam that has worked in the steam turbine is condensed and returned to water by a condenser, and again through a condensate system such as a boiler by driving a condensate pump. Supplied to the steam generating means. On the other hand, in such a brackish water power generation system, sealed water is used to seal the rotating shafts of various rotating devices of the power generation equipment such as a steam turbine. As shown in FIG. 4, the sealed water provided for such use is accumulated in the sealed water recovery tank 1 from various places of the power generation facility. The sealed water collected in the sealed water recovery tank 1 is supplied to the condenser 5 through the sealed water recovery pipe 3 and the sealed water valve 4 by driving the sealed water recovery pump 2.

なお、この種の封水回収システムを開示する公知文献として以下の特許文献が存在する。   In addition, the following patent documents exist as well-known documents which disclose this kind of sealed water recovery system.

特開平７−１２８４８７号公報JP-A-7-128487 特開平８−１３６１６５号公報JP-A-8-136165

上述の如き従来技術に係る封水回収システムにおいては、封水回収ポンプ２が故障した場合には、この封水回収ポンプ２を駆動することができず、封水を復水器５に回収することができないという問題を生起する。さらに、封水を復水器５に回収できない場合には、封水が封水回収タンク１から外部にオーバーフローしてしまうという問題も生起する。   In the sealed water recovery system according to the related art as described above, when the sealed water recovery pump 2 fails, the sealed water recovery pump 2 cannot be driven and the sealed water is recovered in the condenser 5. Cause the problem of not being able to. Furthermore, when the sealed water cannot be collected in the condenser 5, there also arises a problem that the sealed water overflows from the sealed water collection tank 1 to the outside.

一方、故障時に備え予備の封水回収ポンプ２という対策も考えられるが、この場合には設備費が高騰するという新たな問題を生起する。   On the other hand, a measure of a spare sealing water recovery pump 2 in case of a failure can be considered, but in this case, a new problem that the equipment cost increases is caused.

本発明は、上記従来技術に鑑み、封水回収ポンプの故障時であっても封水を復水器内に回収し得る封水回収システムを提供することを目的とする。   An object of the present invention is to provide a sealed water recovery system capable of recovering sealed water in a condenser even in the event of a failure of the sealed water recovery pump.

上記目的を達成する本発明の第１の態様は、
発電設備の各所から集積される封水を貯留する封水回収タンクと、
前記封水回収タンクと復水器との間を連通する封水回収管路の途中に配設され、駆動により前記封水回収タンクに集積された封水を前記封水回収管路を介して復水器に供給する封水回収ポンプと、
前記封水回収ポンプをバイパスして前記封水回収タンクと前記封水回収管路とを連通するバイパス管路とを有することを特徴とする封水回収システムにある。 The first aspect of the present invention for achieving the above object is as follows:
A sealed water recovery tank for storing sealed water accumulated from various places of the power generation facility;
The sealed water collected in the sealed water recovery tank by driving is disposed in the middle of the sealed water recovery pipe that communicates between the sealed water recovery tank and the condenser. A sealed water recovery pump that supplies the condenser;
The seal water recovery system includes a bypass pipe that bypasses the seal water recovery pump and communicates the seal water recovery tank and the seal water recovery pipe.

本発明の第２の態様は、
上記第１の態様に記載する封水回収システムにおいて、
前記バイパス管路には、前記封水回収タンクから復水器に向かう封水の流通のみを許容する逆止弁を配設したことを特徴とする封水回収システムにある。 The second aspect of the present invention is:
In the sealed water recovery system described in the first aspect,
The bypass water pipe is provided with a non-return valve for allowing only a seal water to flow from the seal water recovery tank to the condenser.

本発明の第３の態様は、
上記第１の態様又は第２の態様に記載する封水回収システムにおいて、
さらに前記復水器に流入する封水の量を調整し得るよう前記封水回収管路に配設されている封水弁と、前記封水回収タンクに貯留されている封水の水位を検出するとともに検出した水位に基づき前記封水弁の開度を調整する水位制御手段とを有することを特徴とする封水回収システムにある。 The third aspect of the present invention is:
In the sealed water recovery system described in the first aspect or the second aspect,
Further, a seal valve disposed in the seal water recovery pipe so that the amount of seal water flowing into the condenser can be adjusted, and a water level of the seal water stored in the seal water recovery tank is detected. And a water level control means for adjusting the opening of the water seal valve based on the detected water level.

本発明の第４の態様は、
上記第１の態様乃至第３の態様の何れか一つに記載する封水回収システムにおいて、
さらに前記封水回収タンクに貯留されている封水の水位を検出するとともに、検出した水位に基づき前記ポンプの駆動を制御する水位スイッチ手段を有することを特徴とする封水回収システムにある。 The fourth aspect of the present invention is:
In the sealed water recovery system according to any one of the first to third aspects,
The seal water recovery system further includes a water level switch means for detecting the level of the seal water stored in the seal water recovery tank and controlling the drive of the pump based on the detected water level.

本発明の第５の態様は、
上記第１乃至第４の態様の何れか一つに記載する封水回収システムを有することを特徴とする発電設備にある。 According to a fifth aspect of the present invention,
The power generation facility includes the sealed water recovery system according to any one of the first to fourth aspects.

本発明によれば、封水回収ポンプが故障等により停止しても復水器を介してバイパス管路に作用する負圧で封水回収タンクの封水を吸引して復水器に導入することができる。この結果、封水回収タンクにおける封水のオーバーフローを防止して良好に封水の復水器への回収を継続することができる。   According to the present invention, even if the seal water recovery pump stops due to a failure or the like, the seal water in the seal water recovery tank is sucked and introduced into the condenser with a negative pressure acting on the bypass line via the condenser. be able to. As a result, it is possible to prevent the seal water from overflowing in the seal water recovery tank and to continue the recovery of the seal water to the condenser.

以下本発明の実施の形態を図面に基づき詳細に説明する。なお、図４に示す従来技術と同一部分には同一番号を付している。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same parts as those in the prior art shown in FIG.

図１は本発明の実施の形態に係る封水回収システムを有する発電設備の概略を示すブロック線図である。同図に示すように、当該発電設備は、燃料Ｆが高温で燃焼されるボイラ１００を備えており、このボイラ１００で発生した蒸気を蒸気タービン１０１に供給し、この蒸気タービン１０１を駆動することにより発電機１０２を駆動して所定の電力を発生する。一方、蒸気タービン１０１で仕事をした蒸気は復水器５で凝縮されて水に戻る。復水器５で凝縮された水は、管路である復水系１０３を介してボイラ１００に戻り、再度蒸気となって循環する。復水系１０３の途中には復水ポンプ１０４、脱塩装置１０５、脱気器１０６及び給水ポンプ１０７が配設してあり、復水ポンプ１０４で循環させる復水を脱塩、脱気の後、給水ポンプ１０７でボイラ１００に圧送している。   FIG. 1 is a block diagram showing an outline of a power generation facility having a sealed water recovery system according to an embodiment of the present invention. As shown in the figure, the power generation facility includes a boiler 100 in which fuel F is combusted at a high temperature, supplies steam generated in the boiler 100 to a steam turbine 101, and drives the steam turbine 101. To drive the generator 102 to generate predetermined power. On the other hand, the steam that has worked in the steam turbine 101 is condensed in the condenser 5 and returned to water. The water condensed in the condenser 5 returns to the boiler 100 through the condensate system 103 which is a pipe, and circulates again as steam. In the middle of the condensate system 103, a condensate pump 104, a demineralizer 105, a deaerator 106, and a feed water pump 107 are disposed. The feed water pump 107 pumps the boiler 100.

さらに、本形態にかかる発電設備は蒸気タービン１０１等、当該発電設備の各種回転機器の回転軸のシールに利用する封水を封水回収タンク１に収集して回収するための封水回収システムを有している。また、本形態に係る封水回収システムは、従来と同様の、封水回収タンク１、封水回収ポンプ２、封水回収管路３及び封水弁４に加えてバイパス管路６、逆止弁７、水位制御装置８及び水位スイッチ装置１０を有している。   Furthermore, the power generation facility according to the present embodiment includes a seal water recovery system for collecting and recovering the seal water used for sealing the rotary shafts of various rotating devices of the power generation facility such as the steam turbine 101 in the seal water recovery tank 1. Have. The sealed water recovery system according to the present embodiment is similar to the conventional sealed water recovery tank 1, sealed water recovery pump 2, sealed water recovery pipeline 3, and sealed water valve 4 in addition to the bypass pipeline 6, check. It has a valve 7, a water level control device 8 and a water level switch device 10.

図２は図１に示す発電設備における封水回収システムを抽出・拡大して示す説明図である。図１とともに図２に明確に示すように、封水回収タンク１は当該発電設備の各所から集積される封水を貯留する。封水回収ポンプ２は封水回収タンク１と復水器５との間を連通する封水回収管路３の途中に配設されている。この封水回収ポンプ２の駆動により、封水回収タンク１に集積された封水を封水回収管路３を介して復水器５に供給する。バイパス管路６は、封水回収ポンプ２をバイパスして封水回収タンク１と封水回収管路３とを連通する。このバイパス管路６の途中には封水回収タンク１から復水器５に向かう封水の流通のみを許容する逆止弁７が配設してある。水位制御装置８は、封水回収タンク１に貯留されている封水の水位を検出するとともに、その水位が予め設定された設定水位になるように封水弁４の開度を調整する。このため、水位制御装置８は封水回収タンク１内の封水に浸漬され得るセンサ９を有しており、このセンサ９が検出する封水の水位に基づいて封水弁４の開度を調整する（調整の具体的内容は後に詳述する。）。水位スイッチ装置１０は、封水回収タンク１に貯留されている封水の水位をセンサ１１ａ，１１ｂ，１１ｃにより検出し、検出した水位に基づき所定の警報の発信や封水回収ポンプ２の駆動・停止を制御する。ここで、センサ１１ａ乃至１１ｃは封水回収タンク１内における各配設位置を変えてあり、封水回収タンク１内における位置が高いほうからセンサ１１ａ，１１ｂ，１１ｃとなっている。これにより、水位に応じた適切な制御を行うようになっているが、具体的な内容に関しては後に詳述する。   FIG. 2 is an explanatory view showing the seal water recovery system in the power generation facility shown in FIG. As clearly shown in FIG. 2 together with FIG. 1, the sealed water recovery tank 1 stores sealed water collected from various places of the power generation facility. The seal water recovery pump 2 is disposed in the middle of a seal water recovery pipe 3 that communicates between the seal water recovery tank 1 and the condenser 5. The sealed water collected in the sealed water collection tank 1 is supplied to the condenser 5 through the sealed water collection pipe 3 by driving the sealed water collection pump 2. The bypass line 6 bypasses the seal water recovery pump 2 to connect the seal water recovery tank 1 and the seal water recovery pipe line 3. In the middle of the bypass pipe 6, a check valve 7 that allows only the circulation of the sealed water from the sealed water recovery tank 1 to the condenser 5 is disposed. The water level control device 8 detects the level of the sealed water stored in the sealed water recovery tank 1 and adjusts the opening degree of the sealing valve 4 so that the water level becomes a preset set water level. For this reason, the water level control device 8 has a sensor 9 that can be immersed in the sealed water in the sealed water recovery tank 1, and the opening degree of the sealing valve 4 is set based on the level of the sealed water detected by the sensor 9. Adjust (details of the adjustment will be described later in detail). The water level switch device 10 detects the water level of the seal water stored in the seal water recovery tank 1 by means of the sensors 11a, 11b, 11c. Control the stop. Here, the sensors 11a to 11c are arranged at different positions in the sealed water recovery tank 1, and are arranged as sensors 11a, 11b, and 11c from the higher position in the sealed water recovery tank 1. As a result, appropriate control according to the water level is performed, but specific contents will be described in detail later.

かかる、本形態においてセンサ９及びセンサ１１ａ，１１ｂ，１１ｃで検出する封水回収タンク１内の封水の水位が、図３に示すように、設定水位（±０ｍｍ）＋１５０（ｍｍ）と設定水位（±０ｍｍ）−２５０（ｍｍ）との間である範囲Ａ（通常運転範囲）にあるときには、設定水位になるように封水弁４の開度を調整するとともに、封水回収ポンプ２は停止させて復水器５の負圧によりバイパス管路６を介して封水を回収する。   In this embodiment, as shown in FIG. 3, the water level of the sealed water in the sealed water recovery tank 1 detected by the sensor 9 and the sensors 11a, 11b, and 11c is set water level (± 0 mm) +150 (mm). When in the range A (normal operation range) between (± 0 mm) and 250 (mm), the opening degree of the sealing valve 4 is adjusted so that the set water level is reached, and the sealing water recovery pump 2 is stopped. The sealed water is recovered via the bypass line 6 by the negative pressure of the condenser 5.

一方、バイパス管路６を介した回収では間に合わず、図３に示すように、封水の水位が範囲Ａの上限を超えて範囲Ｂに至った場合には、水位高の警報を発するとともに封水回収ポンプ２を起動させて封水回収管路３を介しても封水の回収を行う。この結果、水位が低下し範囲Ａに収まった場合には封水回収ポンプ２を停止させて再度バイパス管路６のみによる封水の回収を行う。   On the other hand, if the recovery level through the bypass line 6 is not in time, and the water level of the sealed water exceeds the upper limit of the range A and reaches the range B, as shown in FIG. The water recovery pump 2 is activated and the sealed water is recovered also through the sealed water recovery pipe 3. As a result, when the water level falls and falls within the range A, the seal water recovery pump 2 is stopped and the seal water is recovered again only by the bypass pipe 6.

封水の水位が範囲Ａの下限を超えて低下した場合には、封水弁４を全閉状態として封水の回収を停止させる。   When the water level of the sealed water falls below the lower limit of range A, the sealing valve 4 is fully closed and the recovery of the sealed water is stopped.

かかる一連の調整乃至制御の態様をまとめたのが表１である。   Table 1 summarizes a series of such adjustment and control modes.

Figure 2009127568
Figure 2009127568

上記本形態によれば、封水回収ポンプ２が故障等により停止しても復水器５を介してバイパス管路６に作用する負圧で封水回収タンク１の封水を吸引して復水器５に導入することができる。   According to the present embodiment, even if the seal water recovery pump 2 is stopped due to a failure or the like, the seal water in the seal water recovery tank 1 is sucked back by the negative pressure acting on the bypass pipe 6 via the condenser 5. It can be introduced into the water vessel 5.

この結果、封水回収ポンプ２が停止していても封水回収タンク１における封水のオーバーフローを防止して良好に封水の復水器５への回収を継続することができる。   As a result, even if the seal water recovery pump 2 is stopped, it is possible to prevent the seal water from overflowing in the seal water recovery tank 1 and to continue the recovery of the seal water to the condenser 5 well.

一方、封水回収ポンプ２の駆動時には逆止弁７の作用により、バイパス管路６を介して封水が封水回収管路３から封水回収タンク１に逆流するのを防止することができる。   On the other hand, when the sealed water collection pump 2 is driven, the check valve 7 can prevent the sealed water from flowing back from the sealed water collection pipe 3 to the sealed water collection tank 1 through the bypass pipe 6. .

なお、本形態に係る発電設備においては、封水回収ポンプ２を駆動することなく負圧だけで充分な処理量の封水を復水器５に導入することはできない場合がある。充分な処理量の封水を吸引するには復水器５の真空度が不足する場合があるからである。このため、本形態では、回収能力が低くて済む通常時には負圧を利用してバイパス管路６を介して回収することにより封水回収ポンプ２の駆動に要するランニングコストの低減を図り、封水の水位が異常状態となったときのみ、封水回収ポンプ２の駆動による回収も行うようにした。   In the power generation facility according to this embodiment, there is a case where a sufficient amount of sealed water cannot be introduced into the condenser 5 only by negative pressure without driving the sealed water recovery pump 2. This is because the vacuum degree of the condenser 5 may be insufficient to suck a sufficient amount of sealed water. For this reason, in this embodiment, the running cost required for driving the seal water recovery pump 2 is reduced by using the negative pressure to recover through the bypass line 6 at normal times when the recovery capability is low, Only when the water level becomes abnormal, recovery by driving the sealed water recovery pump 2 is also performed.

なお、上記実施の形態では水位制御装置８及び水位スイッチ装置１０を設けたので、上述の如き水位に応じた適切な制御を行うことができるが、かかる制御を行わず、封水回収ポンプ２の故障時にも封水を回収してオーバーフローを防止するだけを目的とする場合には水位制御装置８及び水位スイッチ装置１０は必要ではない。かかる態様でも本願発明の所期の目的は達成できる。   In the above embodiment, since the water level control device 8 and the water level switch device 10 are provided, it is possible to perform appropriate control according to the water level as described above. The water level control device 8 and the water level switch device 10 are not necessary when the purpose is to recover the sealed water even in the event of a failure and prevent overflow. Even in such an embodiment, the intended object of the present invention can be achieved.

また、上記実施の形態ではボイラを蒸気発生源とする発電設備について説明したが、これに限定する必要はなく、封水を一旦封水回収タンクに集積して復水器に回収する封水回収システムを有する発電設備であれば何れの方式のものにも適用し得る。   In the above embodiment, the power generation facility using a boiler as a steam generation source has been described. However, the present invention is not limited to this. Sealed water recovery is performed by collecting the sealed water in a sealed water recovery tank and collecting it in a condenser. Any type of power generation equipment having a system can be applied.

本発明は発電設備を製造販売する産業分野や、保守・点検する産業分野で利用することができる。   The present invention can be used in an industrial field in which power generation equipment is manufactured and sold, and an industrial field in which maintenance and inspection are performed.

本発明の実施の形態に係る発電設備の概略を示すブロック線図である。It is a block diagram which shows the outline of the electric power generation equipment which concerns on embodiment of this invention. 本発明の実施の形態に係る封水回収システムの概略を拡大して示す説明図である。It is explanatory drawing which expands and shows the outline of the sealing water collection | recovery system which concerns on embodiment of this invention. 本発明の実施の形態における封水回収タンクの水位と制御の関係を示す説明図である。It is explanatory drawing which shows the relationship between the water level of the sealing water collection | recovery tank in embodiment of this invention, and control. 従来技術に係る封水回収システムの概略を示す説明図である。It is explanatory drawing which shows the outline of the sealing water collection | recovery system which concerns on a prior art.

符号の説明Explanation of symbols

１ 封水回収タンク
２ 封水回収ポンプ
３ 封水回収管路
５ 復水器
６ バイパス管路
７ 逆止弁
８ 水位制御装置
１０ 水位スイッチ装置
１００ ボイラ
１０１ 蒸気タービン
１０２ 発電機
１０３ 復水系 DESCRIPTION OF SYMBOLS 1 Sealed water recovery tank 2 Sealed water recovery pump 3 Sealed water recovery pipeline 5 Condenser 6 Bypass pipeline 7 Check valve 8 Water level control device 10 Water level switch device 100 Boiler 101 Steam turbine 102 Generator 103 Condensate system

Claims (5)

発電設備の各所から集積される封水を貯留する封水回収タンクと、
前記封水回収タンクと復水器との間を連通する封水回収管路の途中に配設され、駆動により前記封水回収タンクに集積された封水を前記封水回収管路を介して復水器に供給する封水回収ポンプと、
前記封水回収ポンプをバイパスして前記封水回収タンクと前記封水回収管路とを連通するバイパス管路とを有することを特徴とする封水回収システム。 A sealed water recovery tank for storing sealed water accumulated from various places of the power generation facility;
The sealed water collected in the sealed water recovery tank by driving is disposed in the middle of the sealed water recovery pipe that communicates between the sealed water recovery tank and the condenser. A sealed water recovery pump that supplies the condenser;
A seal water recovery system comprising a bypass pipe that bypasses the seal water recovery pump and communicates the seal water recovery tank and the seal water recovery pipe. 請求項１に記載する封水回収システムにおいて、
前記バイパス管路には、前記封水回収タンクから復水器に向かう封水の流通のみを許容する逆止弁を配設したことを特徴とする封水回収システム。 In the sealed water recovery system according to claim 1,
The seal water recovery system according to claim 1, wherein a check valve that allows only the flow of seal water from the seal water recovery tank to the condenser is disposed in the bypass line. 請求項１又は請求項２に記載する封水回収システムにおいて、
さらに前記復水器に流入する封水の量を調整し得るよう前記封水回収管路に配設されている封水弁と、前記封水回収タンクに貯留されている封水の水位を検出するとともに検出した水位に基づき前記封水弁の開度を調整する水位制御手段とを有することを特徴とする封水回収システム。 In the sealed water recovery system according to claim 1 or claim 2,
Further, a seal valve disposed in the seal water recovery pipe so that the amount of seal water flowing into the condenser can be adjusted, and a water level of the seal water stored in the seal water recovery tank is detected. And a water level control means for adjusting the opening degree of the water seal valve based on the detected water level. 請求項１乃至請求項３の何れか一つに記載する封水回収システムにおいて、
さらに前記封水回収タンクに貯留されている封水の水位を検出するとともに、検出した水位に基づき前記ポンプの駆動を制御する水位スイッチ手段を有することを特徴とする封水回収システム。 In the sealed water recovery system according to any one of claims 1 to 3,
The seal water recovery system further comprises a water level switch means for detecting the level of the seal water stored in the seal water recovery tank and controlling the drive of the pump based on the detected water level. 請求項１乃至請求項４の何れか一つに記載する封水回収システムを有することを特徴とする発電設備。   A power generation facility comprising the sealed water recovery system according to any one of claims 1 to 4.
JP2007304964A 2007-11-26 2007-11-26 Sealed water recovery system and power generation equipment having the same Expired - Fee Related JP5121418B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775329A (en) * 2013-12-25 2014-05-07 华电国际电力股份有限公司山东分公司 Feed water pump seal water system with heating mode and pure condensing mode
CN106640738A (en) * 2016-12-28 2017-05-10 中国能源建设集团华北电力试验研究院有限公司 Protection method for safe operation of condensate water pump at special stage
CN107165854A (en) * 2017-05-08 2017-09-15 华电电力科学研究院 Sealing Water for Feedwater Pump is automatically controlled and retracting device
JP2019188270A (en) * 2018-04-18 2019-10-31 日本ウォーターシステム株式会社 Water treatment apparatus

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JPH06257564A (en) * 1993-03-03 1994-09-13 Toshiba Corp High-pressure drain pump shaft sealing facility
JPH07128487A (en) * 1993-10-29 1995-05-19 Toshiba Corp Shaft sealing water recovery device for draining pump of supply water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06257564A (en) * 1993-03-03 1994-09-13 Toshiba Corp High-pressure drain pump shaft sealing facility
JPH07128487A (en) * 1993-10-29 1995-05-19 Toshiba Corp Shaft sealing water recovery device for draining pump of supply water heater

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775329A (en) * 2013-12-25 2014-05-07 华电国际电力股份有限公司山东分公司 Feed water pump seal water system with heating mode and pure condensing mode
CN103775329B (en) * 2013-12-25 2016-01-06 华电国际电力股份有限公司山东分公司 A kind of possess heat supply and the double mode Sealing Water for Feedwater Pump system of pure condensate
CN106640738A (en) * 2016-12-28 2017-05-10 中国能源建设集团华北电力试验研究院有限公司 Protection method for safe operation of condensate water pump at special stage
CN107165854A (en) * 2017-05-08 2017-09-15 华电电力科学研究院 Sealing Water for Feedwater Pump is automatically controlled and retracting device
CN107165854B (en) * 2017-05-08 2023-11-14 华电电力科学研究院有限公司 Automatic control and recovery device for sealing water of water supply pump
JP2019188270A (en) * 2018-04-18 2019-10-31 日本ウォーターシステム株式会社 Water treatment apparatus
JP7078983B2 (en) 2018-04-18 2022-06-01 日本ウォーターシステム株式会社 Water treatment equipment

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