JP2014134323A

JP2014134323A - Condensate recovery device

Info

Publication number: JP2014134323A
Application number: JP2013001512A
Authority: JP
Inventors: Takayuki Morii; 高之森井
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2013-01-09
Filing date: 2013-01-09
Publication date: 2014-07-24

Abstract

PROBLEM TO BE SOLVED: To provide a condensate recovery device capable of being used with an economizer.SOLUTION: A condensate recovery device is composed of an ejector pump 4 composed of a circulation passage 3 connecting a circulation pump 1 and an ejector 2, a condensate discharge pipe 5 connected to a branched discharge side of the circulation pump 1, and a switch valve 6 mounted on the condensate discharge pipe 5. Pipe conduits 14 and 15 are connected to the switch valve 6. A water supply line 7 to a steam boiler 12 is connected to a discharge pipe 10 of a water supply pump 9 through an economizer 11. A flow channel of the condensate from the condensate discharge pipe 5 at the discharge side of the circulation pump 1, is switched by operating the switch valve 6 to prevent supply water from being boiled up at the economizer 11, thus the economizer 11 and the condensate recovery device can be used together.

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、蒸気ボイラへの給水ラインにエコノマイザーと併用することができない問題があった。
エコノマイザーは、蒸気ボイラの給水ラインに設置して、蒸気ボイラの燃焼ガスの余熱を利用してボイラへの給水を予熱するものであるが、このエコノマイザーと復水回収装置を併用すると、復水回収装置から高温復水が給水ラインへ供給されると共に、この高温復水がエコノマイザーで更に加熱されて沸騰してしまいボイラへの給水ができなくなってしまうために、両者を併用することができないのである。 This condensate recovery device has a problem that it cannot be used in combination with an economizer in a water supply line to a steam boiler.
The economizer is installed in the water supply line of the steam boiler and preheats the water supply to the boiler using the residual heat of the combustion gas of the steam boiler. Both high-temperature condensate is supplied from the water recovery device to the water supply line, and this high-temperature condensate is further heated by the economizer and boils, making it impossible to supply water to the boiler. It is not possible.

特開２００８−１７０１２６号公報JP 2008-170126 A

解決しようとする課題は、エコノマイザーと併用することのできる復水回収装置を提供することで、熱エネルギーの有効活用を図ることである。 The problem to be solved is to make effective use of thermal energy by providing a condensate recovery device that can be used in combination with an economizer.

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に流路の切替弁を取り付けて、当該切替弁の操作によって切替弁の一方の出口流路をエコノマイザーの入口側と連通し、切替弁の他方の出口流路をエコノマイザーを介さずに直接に蒸気ボイラの給水ライン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 to the discharge path of the circulation pump by connecting the ejector to the discharge side of the circulation pump. By operating the switch valve, one outlet flow path of the switching valve is communicated with the inlet side of the economizer. The other outlet flow path of the switching valve communicates directly with the water supply line of the steam boiler without going through the economizer.

本発明の復水回収装置は、循環ポンプの吐出側に流路の切替弁を取り付けて、この切替弁の操作によって切替弁の一方の出口流路をエコノマイザーの入口側と連通し、切替弁の他方の出口流路をエコノマイザーを介さずに直接に蒸気ボイラの給水ラインと連通したことによって、蒸気ボイラの給水入口側の給水温度が所定値よりも低い場合は、切替弁の一方の出口流路をエコノマイザーの入口側と連通して復水温度をエコノマイザーで更に加熱し、一方、蒸気ボイラの給水入口側の給水温度が所定値よりも高い場合は、切替弁の他方の出口流路をエコノマイザーを介さずに直接に蒸気ボイラの給水ラインと連通したことによって、エコノマイザーでの給水の沸騰を防止して、エコノマイザーと復水回収装置を併用することができる。 The condensate recovery device of the present invention is provided with a flow path switching valve on the discharge side of the circulation pump, and by operating this switching valve, one outlet flow path of the switching valve is communicated with the economizer inlet side. If the feed water temperature at the feed water inlet side of the steam boiler is lower than the predetermined value because the other exit flow path of the steam boiler is directly connected to the feed water line of the steam boiler without going through the economizer, If the flow path is in communication with the economizer inlet side and the condensate temperature is further heated by the economizer, while the water supply temperature on the water supply inlet side of the steam boiler is higher than the predetermined value, the other outlet flow of the switching valve By connecting the road directly to the water supply line of the steam boiler without going through the economizer, the economizer and the condensate recovery device can be used in combination by preventing the water supply from boiling in the economizer.

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、循環ポンプの吐出側に流路の切替弁を取り付けるものであるが、この切替弁としては、いわゆる三方切替弁が好適である。 The condensate recovery apparatus of the present invention is provided with a flow path switching valve on the discharge side of the circulation pump. As this switching valve, a so-called three-way switching valve is suitable.

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、復水吐出管５に取り付けた切替弁６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 switching valve 6 attached to the condensate discharge pipe 5. FIG.

エゼクタポンプ４の下方に給水タンク８と給水ポンプ９を配置して、給水ポンプ９の吐出菅１０にエコノマイザー１１を介在して蒸気ボイラ１２への給水ライン７と接続する。給水タンク８の水が給水ポンプ９によってエコノマイザー１１へ供給され、蒸気ボイラ１２の燃焼ガスの余熱を利用して給水ライン７の水を予熱するものである。 A water supply tank 8 and a water supply pump 9 are arranged below the ejector pump 4 and connected to a water supply line 7 to the steam boiler 12 via an economizer 11 in a discharge tank 10 of the water supply pump 9. The water in the water supply tank 8 is supplied to the economizer 11 by the water supply pump 9 and preheats the water in the water supply line 7 using the residual heat of the combustion gas in the steam boiler 12.

エゼクタポンプ４のエゼクタ２には、図示しない蒸気使用機器と連通した復水回収管１３を接続する。蒸気使用機器で発生した高温復水が復水回収管１３を通ってエゼクタ２へ吸引されるものである。 Connected to the ejector 2 of the ejector pump 4 is a condensate recovery pipe 13 communicated with a steam using device (not shown). The high-temperature condensate generated in the steam-using device is sucked into the ejector 2 through the condensate recovery pipe 13.

循環ポンプ１の吐出側を分岐して接続した復水吐出菅５に切替弁６を取り付ける。切替弁６は、いわゆる三方切替弁で一方の出口流路を管路１４によってエコノマイザー１１の入口側の吐出菅１０と連通し、他方の出口流路を管路１５によって蒸気ボイラ１２の給水ライン７と連通する。給水ライン７には、流下する給水温度を検出することのできる温度センサ１６を取り付ける。 A switching valve 6 is attached to a condensate discharge rod 5 that is branched and connected to the discharge side of the circulation pump 1. The switching valve 6 is a so-called three-way switching valve, with one outlet flow path communicating with the discharge tank 10 on the inlet side of the economizer 11 via a pipe line 14 and the other outlet flow path connecting with a water supply line of the steam boiler 12 via a pipe line 15. Communicate with 7 A temperature sensor 16 capable of detecting the temperature of the flowing water is attached to the water supply line 7.

温度センサ１６の検出値が、例えば、蒸気ボイラ１２で発生する蒸気圧力の飽和温度のマイナス５℃よりも低下すると、切替弁６を操作して一方の出口流路を管路１４によってエコノマイザー１１の入口側の吐出菅１０と接続することで、循環ポンプ１の吐出側の復水吐出菅５からの復水が、管路１４からエコノマイザー１１へ供給されて熱交換されて昇温して給水ライン７から蒸気ボイラ１２へ供給される。 When the detected value of the temperature sensor 16 falls below, for example, minus 5 ° C. of the saturation temperature of the steam pressure generated in the steam boiler 12, the economizer 11 is operated through the conduit 14 by operating the switching valve 6. The condensate from the condensate discharge basin 5 on the discharge side of the circulation pump 1 is supplied to the economizer 11 from the pipe line 14 and is heat-exchanged to raise the temperature. It is supplied from the feed water line 7 to the steam boiler 12.

温度センサ１６の検出値が、蒸気ボイラ１２で発生する蒸気圧力の飽和温度のマイナス５℃よりも上昇すると、切替弁６を操作して他方の出口通路を管路１５によって蒸気ボイラ１２の給水ライン７と直接に接続することで、循環ポンプ１の吐出側の復水吐出菅５からの復水が、管路１５から給水ライン７を通って蒸気ボイラ１２へ供給される。 When the detected value of the temperature sensor 16 rises above minus 5 ° C. of the saturation temperature of the steam pressure generated in the steam boiler 12, the switching valve 6 is operated and the other outlet passage is connected to the water supply line of the steam boiler 12 through the pipe line 15. 7, the condensate from the condensate discharge tank 5 on the discharge side of the circulation pump 1 is supplied to the steam boiler 12 through the water supply line 7 from the pipe line 15.

このように、切替弁６を操作して循環ポンプ１の吐出側の復水吐出管５からの復水の流路を切り替えることによって、エコノマイザー１１での給水の沸騰を防止して、エコノマイザー１１と復水回収装置を併用することができる。 In this way, by operating the switching valve 6 and switching the flow path of the condensate from the condensate discharge pipe 5 on the discharge side of the circulation pump 1, the economizer 11 is prevented from boiling and the economizer 11 11 and the condensate recovery device can be used in combination.

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 APPLICATION This invention can be utilized as a condensate collection | recovery apparatus which collect | recovers the condensate as the condensed water of the steam which generate | occur | produced with the apparatus using steam to a steam boiler.

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切替弁
７給水ライン
８給水タンク
９給水ポンプ
１１エコノマイザー
１２蒸気ボイラ
１４，１５管路
１６温度センサ DESCRIPTION OF SYMBOLS 1 Circulation pump 2 Ejector 3 Circulation path 4 Ejector pump 5 Condensate discharge rod 6 Switching valve 7 Water supply line 8 Water supply tank 9 Water supply pump 11 Economizer 12 Steam boilers 14 and 15 Pipe line 16 Temperature sensor

Claims

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に流路の切替弁を取り付けて、当該切替弁の操作によって切替弁の一方の出口流路をエコノマイザーの入口側と連通し、切替弁の他方の出口流路をエコノマイザーを介さずに直接に蒸気ボイラの給水ライン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. Connect the ejector pump connected to the outlet of the circulation pump to the discharge side of the circulation pump, and connect one outlet flow path of the switching valve to the inlet side of the economizer by operating the switching valve. A condensate recovery apparatus characterized in that the other outlet channel is directly connected to a water supply line of a steam boiler without using an economizer.