JP5248400B2 - Ejector vacuum pump - Google Patents
Ejector vacuum pump Download PDFInfo
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- JP5248400B2 JP5248400B2 JP2009099286A JP2009099286A JP5248400B2 JP 5248400 B2 JP5248400 B2 JP 5248400B2 JP 2009099286 A JP2009099286 A JP 2009099286A JP 2009099286 A JP2009099286 A JP 2009099286A JP 5248400 B2 JP5248400 B2 JP 5248400B2
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- ejector
- condensate
- temperature
- vacuum pump
- valve
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Description
本発明は、蒸気使用機器で発生した蒸気の凝縮水としての復水を、ボイラー等の復水回収先へ回収するエゼクタ真空ポンプに関する。 The present invention relates to an ejector vacuum pump that recovers condensate as condensate of steam generated in a steam-using device to a condensate recovery destination such as a boiler.
従来のエゼクタ真空ポンプは、エゼクタとタンクと液体循環ポンプを組み合わせたもので、比較的高い温度の復水も回収することができるものである。 A conventional ejector vacuum pump is a combination of an ejector, a tank, and a liquid circulation pump, and can recover condensate at a relatively high temperature.
上記従来のエゼクタ真空ポンプでは、蒸気使用機器からの複数の復水排出箇所を、1台のエゼクタ真空ポンプに接続した場合に、エゼクタ真空ポンプの真空吸引力が低下してしまい、復水を確実に吸引することができなくなる問題があった。これは、蒸気使用機器からの複数の復水排出箇所の中には、復水の温度が高いものもあり、エゼクタ真空ポンプにこの高温復水が流入することによって、エゼクタ真空ポンプの真空度が低下して吸引力も低下するためである。 In the above-mentioned conventional ejector vacuum pump, when a plurality of condensate discharge points from a steam-using device is connected to one ejector vacuum pump, the vacuum suction force of the ejector vacuum pump is reduced, and condensate is surely secured. There was a problem that could not be sucked. This is because some of the condensate discharge points from the steam-using equipment have a high condensate temperature, and this high-temperature condensate flows into the ejector vacuum pump. This is because the suction force also decreases.
解決しようとする問題点は、復水の温度が高温の場合に、高温のままで復水がエゼクタ真空ポンプへ流入しないようにして、エゼクタ真空ポンプを循環する液体の温度が上昇することを防止することによって、所定の真空吸引力を維持することのできるエゼクタ真空ポンプを得ることである。 The problem to be solved is that when the temperature of the condensate is high, the condensate does not flow into the ejector vacuum pump at a high temperature and the temperature of the liquid circulating in the ejector vacuum pump is prevented from rising. Thus, an ejector vacuum pump capable of maintaining a predetermined vacuum suction force is obtained.
本発明は、エゼクタの入口側を液体循環ポンプを介してタンクと接続し、エゼクタの吸込室を蒸気使用機器の複数の復水排出箇所と接続したものにおいて、蒸気使用機器の復水排出箇所とエゼクタの吸込室との接続管路の一部を分岐して、所定温度以上の復水が流入してくると開弁する自動温度開閉弁を取り付けて、当該自動温度開閉弁をアクチュエータ部に感温素子としてのバイメタルを積層配置した構成にすると共に、当該自動温度開閉弁の出口側に熱交換器を介してエゼクタの吸込室と接続したものである。 In the present invention, the inlet side of the ejector is connected to a tank via a liquid circulation pump, and the suction chamber of the ejector is connected to a plurality of condensate discharge points of the steam-using device. An automatic temperature on / off valve that opens when a condensate with a temperature equal to or higher than the specified temperature flows in is branched from the ejector's suction chamber, and the actuator is sensed by the automatic temperature on / off valve. In addition to a configuration in which bimetals as temperature elements are stacked, the outlet side of the automatic temperature on-off valve is connected to the suction chamber of the ejector via a heat exchanger.
本発明は、蒸気使用機器の復水排出箇所と、エゼクタの吸込室との間に自動温度開閉弁と熱交換器を取り付けたことによって、所定温度以上の復水がこの自動温度開閉弁に流入してくると、自動温度開閉弁が開弁して高温復水を熱交換器へ通過させて温度低下した復水をエゼクタの吸込室へ供給することで、エゼクタ真空ポンプの循環液体の温度上昇を防止して、エゼクタ真空ポンプの真空吸引力を所定値に維持することができるという利点がある。 In the present invention, an automatic temperature on / off valve and a heat exchanger are installed between the condensate discharge point of the steam-using device and the suction chamber of the ejector, so that condensate of a predetermined temperature or more flows into the automatic temperature on / off valve. When this happens, the temperature of the circulating liquid in the ejector vacuum pump rises by opening the automatic temperature on-off valve and passing the hot condensate through the heat exchanger to supply the condensate whose temperature has decreased to the suction chamber of the ejector. This is advantageous in that the vacuum suction force of the ejector vacuum pump can be maintained at a predetermined value.
本発明は、所定温度以上の復水が流入してくると開弁する自動温度開閉弁を取り付けるものであるが、自動温度開閉弁としては、例えば、バイメタルや液封ベローズや形状記憶合金などを感温素子に用いた従来公知のものを用いることができる。 The present invention attaches an automatic temperature on / off valve that opens when condensate of a predetermined temperature or more flows in. As the automatic temperature on / off valve, for example, bimetal, liquid seal bellows, shape memory alloy, etc. The conventionally known one used for the temperature sensitive element can be used.
図1において、図示しない蒸気使用機器の復水排出箇所と接続した複数の復水排出管1,2と、復水排出管1の下部に取り付けた自動温度開閉弁3と熱交換器15、及び、エゼクタ4とタンク5と液体循環ポンプ6とでエゼクタ真空ポンプを構成する。 In FIG. 1, a plurality of condensate discharge pipes 1 and 2 connected to a condensate discharge point of a steam-using device (not shown), an automatic temperature on-off valve 3 and a heat exchanger 15 attached to the lower part of the condensate discharge pipe 1, The ejector 4, the tank 5 and the liquid circulation pump 6 constitute an ejector vacuum pump.
図示しない蒸気使用機器で蒸気が凝縮して発生した復水が、復水排出管1,2を流下してエゼクタ4に吸引されるものである。復水排出管1の接続管路7を分岐して分岐管8を接続する。分岐管8に自動温度開閉弁3と熱交換器15を取り付ける。 Condensate generated by condensing steam in a steam using device (not shown) flows down the condensate discharge pipes 1 and 2 and is sucked into the ejector 4. The connecting pipe 7 of the condensate discharge pipe 1 is branched and the branch pipe 8 is connected. The automatic temperature switching valve 3 and the heat exchanger 15 are attached to the branch pipe 8.
自動温度開閉弁3は、アクチュエータ部9に感温素子としてのバイメタルを積層配置したもので、このバイメタルの外周に復水排出管1からの復水が流入して、復水の温度が所定温度以上の高温の場合に、バイメタルが膨張して開弁して分岐管8から熱交換器15へ高温復水が流下して熱交換され低温復水となる。一方、復水排出管1からの復水温度が所定温度以下の低温の場合は、バイメタルが収縮して閉弁し、低温復水が接続管路7を流下してエゼクタ4に吸引される。 The automatic temperature on-off valve 3 is formed by stacking bimetals as temperature sensing elements on the actuator unit 9. Condensate from the condensate discharge pipe 1 flows into the outer periphery of the bimetal, and the temperature of the condensate is a predetermined temperature. In the case of the above high temperature, the bimetal expands and opens, and the high-temperature condensate flows from the branch pipe 8 to the heat exchanger 15 to exchange heat and become low-temperature condensate. On the other hand, when the condensate temperature from the condensate discharge pipe 1 is a low temperature equal to or lower than a predetermined temperature, the bimetal contracts and closes, and the low-temperature condensate flows down the connecting pipe 7 and is sucked into the ejector 4.
エゼクタ4とタンク5と液体循環ポンプ6を、それぞれ循環路10で接続する。エゼクタ4の入口側に液体循環ポンプ6を接続し、エゼクタ4の出口側にタンク5を接続する。タンク5の上部に冷却水補給管11を接続する。また、循環路10を分岐して復水回収管12を接続する。 The ejector 4, the tank 5, and the liquid circulation pump 6 are connected by a circulation path 10. A liquid circulation pump 6 is connected to the inlet side of the ejector 4, and a tank 5 is connected to the outlet side of the ejector 4. A cooling water supply pipe 11 is connected to the upper part of the tank 5. Further, the circulation path 10 is branched and a condensate recovery pipe 12 is connected.
タンク5内の冷却水が、液体循環ポンプ6の駆動によってエゼクタ4に供給され、エゼクタ4の吸込室13で真空吸引力を発生して、復水排出管1,2の復水を吸引するものである。 Cooling water in the tank 5 is supplied to the ejector 4 by driving the liquid circulation pump 6 and generates a vacuum suction force in the suction chamber 13 of the ejector 4 to suck the condensate in the condensate discharge pipes 1 and 2. It is.
復水排出管1から流下してきた復水の温度が所定値以上の場合に、自動温度開閉弁3が自動開弁して、高温復水を熱交換器15で低温復水とすることによって、タンク5内の冷却水の温度上昇を防止して、エゼクタ4での真空吸引力を所定値に維持することができる。 When the temperature of the condensate flowing down from the condensate discharge pipe 1 is equal to or higher than a predetermined value, the automatic temperature on / off valve 3 is automatically opened, and the high-temperature condensate is converted into the low-temperature condensate by the heat exchanger 15. The temperature rise of the cooling water in the tank 5 can be prevented, and the vacuum suction force in the ejector 4 can be maintained at a predetermined value.
蒸気使用機器で発生する復水の温度が、高温と低温の複数種の場合のエゼクタ真空ポンプとして適用できる。 It can be applied as an ejector vacuum pump when the temperature of the condensate generated in the steam-using equipment is high or low.
1,2 復水排出管
3 自動温度開閉弁
4 エゼクタ
5 タンク
6 液体循環ポンプ
7 接続管路
8 分岐管
9 アクチュエータ部
10 循環路
12 復水回収管
13 吸込室
15 熱交換器
1, 2 Condensate discharge pipe 3 Automatic temperature switching valve 4 Ejector 5 Tank 6 Liquid circulation pump 7 Connection pipe 8 Branch pipe 9 Actuator section 10 Circulation path 12 Condensate recovery pipe 13 Suction chamber 15 Heat exchanger
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2009099286A JP5248400B2 (en) | 2009-04-15 | 2009-04-15 | Ejector vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009099286A JP5248400B2 (en) | 2009-04-15 | 2009-04-15 | Ejector vacuum pump |
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Publication Number | Publication Date |
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JP2010249025A JP2010249025A (en) | 2010-11-04 |
JP5248400B2 true JP5248400B2 (en) | 2013-07-31 |
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JP2009099286A Expired - Fee Related JP5248400B2 (en) | 2009-04-15 | 2009-04-15 | Ejector vacuum pump |
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Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6016817Y2 (en) * | 1980-04-15 | 1985-05-24 | 熱工技術株式会社 | Drain recovery device |
JP2004073941A (en) * | 2002-08-13 | 2004-03-11 | Tlv Co Ltd | Steam heating equipment |
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JP2010249025A (en) | 2010-11-04 |
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