JP2014047987A - Condensate recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condensate recovery device not generating any steam loss.SOLUTION: A condensate recovery pipe 8 is connected to a separation tank 9. A water ejector 7 is connected to an upper part of the separation tank 9, and an ejector 2 of an ejector pump 4 is connected to a lower part of the separation tank 9. The ejector pump 4 is formed of a circulation pump 1, a circuit 3 and the ejector 2. The circuit 3 is branched to cause a condensate discharge pipe 5 to be communicated with a branch pipe 6. The water ejector 7 is connected to the branch pipe 6, and a suction port 12 is communicated with an upper part of the separation tank 9. The lower part of the separation tank 9 is communicated with a suction port 13 of the ejector 2. Re-evaporated steam evaporated again from high temperature condensate within the separation tank 9 is sucked into the suction port 12 of the water ejector 7, whereby the re-evaporated steam from the high temperature condensate is not discharged out of a system and steam loss can be prevented.

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、蒸気ボイラや給水タンク等の所定の復水回収先へ回収する復水回収装置に関する。 The present invention relates to a condensate recovery apparatus that recovers condensate as condensed water of steam generated in a steam-using device to a predetermined condensate recovery destination such as a steam boiler or a water supply tank.

従来の復水回収装置は、蒸気使用機器の復水出口側を蒸気トラップと復水集合タンクと逆止弁を介して復水圧送部材に接続し、この復水圧送部材の高圧操作流体排出口に圧力制御弁を取り付けたもので、熱エネルギー損失を少なくすることができるものである。 In the conventional condensate recovery device, the condensate outlet side of the steam-using device is connected to the condensate pumping member via the steam trap, the condensate collecting tank, and the check valve, and the high-pressure operation fluid discharge port of the condensate pumping member A pressure control valve is attached to the tube, and heat energy loss can be reduced.

この復水回収装置においては、高圧操作流体排出口から、高圧の操作流体、例えば、高圧蒸気が系外へ排出されることに伴う蒸気損失を発生する問題があった。   This condensate recovery device has a problem of generating steam loss due to discharge of a high-pressure operation fluid, for example, high-pressure steam, from the high-pressure operation fluid discharge port.

特開２００８−１７０１２６号公報JP 2008-170126 A

解決しようとする課題は、蒸気損失を発生することのない復水回収装置を提供すること。 The problem to be solved is to provide a condensate recovery device that does not generate steam loss.

本発明は、蒸気使用機器で蒸気が凝縮して発生した復水を、復水回収管から復水回収ポンプによって所定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、循環ポンプとエゼクタを循環路で接続したエゼクタポンプとし、当該循環ポンプの吐出側の循環路の一部を分岐して復水吐出菅を接続して、当該復水吐出菅の出口側を復水回収先と接続すると共に、循環ポンプの吐出側の循環路の一部を別個に分岐して水エゼクタと接続して、当該水エゼクタの吸引口と上記エゼクタの吸引口とを、それぞれ復水回収管と接続し、当該水エゼクタの出口側を復水吐出菅と連通したものである。 The present invention recovers condensate generated by condensing steam in a steam-using device from a condensate recovery pipe to a predetermined condensate recovery destination by a condensate recovery pump. The condensate recovery pump is a circulation pump. The ejector pump is connected by a circulation path, and a part of the circulation path on the discharge side of the circulation pump is branched to connect a condensate discharge rod. The outlet side of the condensate discharge rod is used as a condensate recovery destination. In addition to connecting, a part of the circulation path on the discharge side of the circulation pump is branched separately and connected to the water ejector, and the suction port of the water ejector and the suction port of the ejector are connected to the condensate recovery pipe, respectively. The outlet side of the water ejector communicates with the condensate discharge rod.

本発明の復水回収装置は、水エゼクタの吸引口と、復水回収ポンプのエゼクタの吸引口とを、それぞれ復水回収管と接続したことによって、復水回収管内で高温復水から再蒸発した再蒸発蒸気は、主に水エゼクタの吸引口へ吸引され、復水吐出菅から復水回収先へと供給されることにより、再蒸発蒸気を系外へ排出することがなく、蒸気損失を防止することができる。   The condensate recovery device of the present invention is configured to re-evaporate from the high-temperature condensate in the condensate recovery pipe by connecting the suction port of the water ejector and the suction port of the condensate recovery pump to the condensate recovery pipe, respectively. The re-evaporated steam is mainly sucked into the suction port of the water ejector and supplied from the condensate discharge tank to the condensate recovery destination. Can be prevented.

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.

本発明の復水回収装置は、水エゼクタの吸引口と、復水回収ポンプのエゼクタの吸引口とを、それぞれ復水回収管と接続するものであるが、それぞれの吸引口と復水回収管との間に、復水回収管内の高温復水と再蒸発蒸気を分離する分離タンクを配置することが好適である。分離タンクで復水と再蒸発蒸気が分離され、分離された再蒸発蒸気は水エゼクタの吸引口に吸引され、一方、分離された復水は復水回収ポンプのエゼクタの吸引口に吸引される。 The condensate recovery apparatus of the present invention connects the suction port of the water ejector and the suction port of the ejector of the condensate recovery pump to the condensate recovery pipe, respectively. It is preferable to arrange a separation tank for separating the high-temperature condensate and the re-evaporated steam in the condensate recovery pipe. Condensate and re-evaporated steam are separated in the separation tank, and the separated re-evaporated steam is sucked into the suction port of the water ejector, while the separated condensate is sucked into the suction port of the condensate recovery pump. .

図１は本実施例の構成図であって、循環ポンプ１とエゼクタ２とを接続する循環路３からなるエゼクタポンプ４と、循環ポンプ１の吐出側を分岐して接続した復水吐出管５と、循環ポンプ１の吐出側を別個に分岐して分岐管６で接続した水エゼクタ７とで復水回収装置を構成する。 FIG. 1 is a block diagram of the present embodiment, in which an ejector pump 4 comprising a circulation path 3 that connects a circulation pump 1 and an ejector 2 and a condensate discharge pipe 5 that branches and connects the discharge side of the circulation pump 1. And the condensate collection | recovery apparatus is comprised with the water ejector 7 which branched the discharge side of the circulation pump 1 separately, and was connected with the branch pipe 6. FIG.

図示しない蒸気使用機器と接続した復水回収管８を分離タンク９に連通する。分離タンク９の上部に管路１０を介して水エゼクタ７の吸引口１２を接続する。分離タンク９の下部には管路１１を介してエゼクタ２の吸引口１３を接続する。 A condensate recovery pipe 8 connected to a steam using device (not shown) is communicated with the separation tank 9. A suction port 12 of the water ejector 7 is connected to the upper part of the separation tank 9 through a pipe line 10. A suction port 13 of the ejector 2 is connected to the lower part of the separation tank 9 through a pipe line 11.

分離タンク９は円筒状の密閉タンクとして、図示しない蒸気使用機器で発生した復水を復水回収管８から受け入れて、その内部で復水から再蒸発した再蒸発蒸気と復水とに分離する。 The separation tank 9 is a cylindrical sealed tank that receives condensate generated by a steam-using device (not shown) from the condensate recovery pipe 8 and separates it into re-evaporated steam and condensate re-evaporated from the condensate. .

エゼクタポンプ４の循環路３を分岐した復水吐出菅５の出口側すなわち右端部は図示しない復水回収先と接続する。復水吐出菅５には、この復水吐出菅５を流下する復水の量を調節するための流量調節弁１４を取り付ける。 The outlet side of the condensate discharge rod 5 branched from the circulation path 3 of the ejector pump 4, that is, the right end is connected to a condensate collection destination (not shown). A flow rate adjusting valve 14 for adjusting the amount of condensate flowing down the condensate discharge rod 5 is attached to the condensate discharge rod 5.

水エゼクタ７と接続した分岐管６にも、流下する復水の量を調節するための流量調節弁１４を取り付ける。水エゼクタ７の出口側は、管路１６を介して復水吐出菅５と連通する。 The branch pipe 6 connected to the water ejector 7 is also provided with a flow rate adjusting valve 14 for adjusting the amount of condensed water flowing down. The outlet side of the water ejector 7 communicates with the condensate discharge rod 5 via a pipe line 16.

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は、復水回収管８を通って分離タンク９へ至る。分離タンク９へ至った復水は、分離タンク９内で復水から再蒸発した再蒸発蒸気と再蒸発し切れなかった復水とに分離され、再蒸発蒸気が分離タンク９の上部に溜まり、復水が分離タンク９の下部に溜まる。 Condensate generated by condensing steam in a steam-using device (not shown) passes through the condensate recovery pipe 8 to the separation tank 9. The condensate that has reached the separation tank 9 is separated into re-evaporated steam re-evaporated from the condensate and condensate that has not been re-evaporated in the separation tank 9, and the re-evaporated steam accumulates in the upper part of the separation tank 9. Condensate accumulates in the lower part of the separation tank 9.

エゼクタポンプ４の循環ポンプ１を駆動して、循環路３内に復水を循環させる。循環する復水によって、エゼクタ２で吸引力を発生して吸引口１３から分離タンク９内の下部に溜まった復水を、管路１１を介して吸引する。循環している復水の一部を、流量調節弁１５から分岐管６を経て水エゼクタ７へ供給すると共に、流量調節弁１４から復水吐出菅５を経て図示しない復水回収先へも供給する。 The circulation pump 1 of the ejector pump 4 is driven to circulate the condensate in the circulation path 3. Condensate collected in the lower portion of the separation tank 9 from the suction port 13 by generating suction force by the circulating condensate 2 is sucked through the conduit 11. A part of the circulated condensate is supplied from the flow control valve 15 to the water ejector 7 through the branch pipe 6, and also supplied from the flow control valve 14 to the condensate collection destination (not shown) through the condensate discharge rod 5. To do.

流量調節弁１５から分岐管６を経て水エゼクタ７へ供給する復水によって、水エゼクタ７で吸引力を発生して吸引口１２から分離タンク９の上部に溜まった再蒸発蒸気を、管路１０を介して吸引する。このように、復水回収管８内と分離タンク９内で高温復水から再蒸発した再蒸発蒸気を、水エゼクタ７の吸引口１２へ吸引して、管路１６と復水吐出菅５から復水回収先へと供給することにより、高温復水からの再蒸発蒸気を系外へ排出することがなく、蒸気損失を防止することができる。 By the condensate supplied from the flow control valve 15 to the water ejector 7 via the branch pipe 6, the re-evaporated vapor generated in the water ejector 7 and accumulated in the upper part of the separation tank 9 from the suction port 12 is supplied to the pipe 10. To suck through. In this way, the re-evaporated vapor re-evaporated from the high-temperature condensate in the condensate recovery pipe 8 and the separation tank 9 is sucked into the suction port 12 of the water ejector 7, and from the conduit 16 and the condensate discharge rod 5. By supplying to the condensate recovery destination, re-evaporated steam from the high-temperature condensate is not discharged out of the system, and steam loss can be prevented.

分岐管６から水エゼクタ７へ供給する復水の温度をより低くすることによって、水エゼクタ７で発生する吸引力を、より大きなものとすることができるために、分岐管６に図示はしないが多数の冷却フィンを取り付けて、分岐管６を流下する復水の温度を低下させることが望ましい。 Although the suction force generated in the water ejector 7 can be increased by lowering the temperature of the condensate supplied from the branch pipe 6 to the water ejector 7, the branch pipe 6 is not illustrated. It is desirable to reduce the temperature of the condensate flowing down the branch pipe 6 by attaching a large number of cooling fins.

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、蒸気ボイラや給水タンク等の所定の復水回収先へ回収する復水回収装置として利用することができる。   INDUSTRIAL APPLICABILITY The present invention can be used as a condensate recovery device that recovers condensate as condensate of steam generated in a steam-using device to a predetermined condensate recovery destination such as a steam boiler or a water supply tank.

１ 循環ポンプ
２ エゼクタ
３ 循環路
４ エゼクタポンプ
５ 復水吐出菅
６ 分岐管
７ 水エゼクタ
８ 復水回収管
９ 分離タンク
１２，１３ 吸引口 DESCRIPTION OF SYMBOLS 1 Circulation pump 2 Ejector 3 Circulation path 4 Ejector pump 5 Condensate discharge tank 6 Branch pipe 7 Water ejector 8 Condensate recovery pipe 9 Separation tanks 12 and 13 Suction port

Claims (1)

蒸気使用機器で蒸気が凝縮して発生した復水を、復水回収管から復水回収ポンプによって所定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、循環ポンプとエゼクタを循環路で接続したエゼクタポンプとし、当該循環ポンプの吐出側の循環路の一部を分岐して復水吐出菅を接続して、当該復水吐出菅の出口側を復水回収先と接続すると共に、循環ポンプの吐出側の循環路の一部を別個に分岐して水エゼクタと接続して、当該水エゼクタの吸引口と上記エゼクタの吸引口とを、それぞれ復水回収管と接続し、当該水エゼクタの出口側を復水吐出菅と連通したことを特徴とする復水回収装置。 Condensate generated by steam condensing in steam-using equipment is collected from the condensate recovery pipe to the specified condensate recovery destination by the condensate recovery pump. The condensate recovery pump is connected to the circulation pump and the ejector. In the ejector pump connected at, a part of the circulation path on the discharge side of the circulation pump is branched to connect a condensate discharge rod, and the outlet side of the condensate discharge rod is connected to the condensate recovery destination. A part of the circulation path on the discharge side of the circulation pump is separately branched and connected to a water ejector, and the suction port of the water ejector and the suction port of the ejector are connected to a condensate recovery pipe, respectively. A condensate recovery device characterized in that the outlet side of the ejector communicates with a condensate discharge rod.

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