JP2009144609A - Steam ejector - Google Patents

Steam ejector Download PDF

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Publication number
JP2009144609A
JP2009144609A JP2007323252A JP2007323252A JP2009144609A JP 2009144609 A JP2009144609 A JP 2009144609A JP 2007323252 A JP2007323252 A JP 2007323252A JP 2007323252 A JP2007323252 A JP 2007323252A JP 2009144609 A JP2009144609 A JP 2009144609A
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diffuser
ejector
nozzle part
pressure
steam
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JP2007323252A
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JP5269407B2 (en
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Naoki Matsukawa
直樹 松川
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TLV Co Ltd
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TLV Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To maintain high ejector efficiency even when a driving steam pressure, a suction fluid amount, or a delivery pressure is varied. <P>SOLUTION: A steam pipe 8 is connected to a driving steam port 10 of an ejector 22 through a pressure reducing valve 1. A nozzle part needle valve 7 is attached to a nozzle part 2 of the ejector 22. A diffuser part needle valve 9 is attached to an inside of a diffuser 4 of the ejector 22. One end of a pipe passage 5 is connected to the half way of an outlet side pipe 23, and the other end is connected to a secondary pressure detecting port 3 of the pressure reducing valve 1. A suction chamber 6 of the ejector 22 is connected to a re-evaporation tank 13. The nozzle part needle valve 7 and the diffuser part needle valve 9 are suitably rotated, and thereby, a flow passage area in the nozzle part 2 and the diffuser 4 can be adjusted, and an original function of the ejector 22 can be fulfilled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、駆動蒸気をノズルから高速で噴出させて、その流体の速度エネルギにより吸込室に吸引力を発生する蒸気エゼクタに関する。   The present invention relates to a steam ejector that ejects drive steam from a nozzle at high speed and generates suction force in a suction chamber by velocity energy of the fluid.

蒸気エゼクタは、ノズルを内蔵した吸引室の入口側に圧力調節弁を接続し、ディフューザの出口側に圧力センサを取り付けて、この圧力センサの検出値に応じて圧力調節弁の弁開度を駆動制御することによって、吸引室で発生する吸引力を制御することができるものである。   The steam ejector is connected to a pressure control valve on the inlet side of a suction chamber with a built-in nozzle, and a pressure sensor is attached to the outlet side of the diffuser, and the valve opening of the pressure control valve is driven according to the detected value of this pressure sensor. By controlling, the suction force generated in the suction chamber can be controlled.

この蒸気エゼクタにおいては、ノズルとディフューザの流路面積がある一定の固定値であり適宜に調節することができないために、駆動蒸気圧力が変動したり、吸引する流体量が変動したり、あるいは、ディフューザからの吐出圧力が変動すると、エゼクタ効率が極端に低下してしまい、本来のエゼクタとしての機能を果たせなくなってしまう問題があった。
特開２００３−２６９４００号公報 In this steam ejector, the flow area of the nozzle and diffuser is a certain fixed value and cannot be adjusted appropriately, so the driving steam pressure fluctuates, the amount of fluid to be sucked fluctuates, or When the discharge pressure from the diffuser fluctuates, the ejector efficiency is extremely lowered, and the original function as an ejector cannot be performed.
JP 2003-269400 A

解決しようとする課題は、ノズルとディフューザの流路面積を任意に調節することができるようにして、駆動蒸気圧力の変動や、吸引流体量の変動、あるいは、吐出圧力が変動しても、高いエゼクタ効率を維持することのできる蒸気エゼクタを提供することである。   The problem to be solved is that the flow area of the nozzle and the diffuser can be arbitrarily adjusted, and even if the fluctuation of the driving steam pressure, the fluctuation of the suction fluid amount, or the fluctuation of the discharge pressure is high A steam ejector capable of maintaining ejector efficiency is provided.

本発明は、流体を絞る細孔からなるノズル部と、当該ノズル部の周囲に形成した吸込室と、当該吸込室及び上記ノズル部と連通したディフューザとからなるものにおいて、ノズル部の内部流路を調節するノズル流路調節部材と、ディフューザの内部流路を調節するディフューザ流路調節部材を取り付けると共に、ノズル部の入口側に減圧弁を接続して、当該減圧弁の二次側圧力検出口を、ディフューザ内の出口側部、又は、ディフューザの出口側部と接続したものである。   The present invention consists of a nozzle part composed of pores for restricting fluid, a suction chamber formed around the nozzle part, and a diffuser communicating with the suction chamber and the nozzle part. A nozzle flow path adjusting member that adjusts the inner flow path and a diffuser flow path adjusting member that adjusts the internal flow path of the diffuser are attached, and a pressure reducing valve is connected to the inlet side of the nozzle portion, and a secondary pressure detection port of the pressure reducing valve Is connected to the outlet side of the diffuser or the outlet side of the diffuser.

本発明の蒸気エゼクタは、ノズル部の内部流路を調節するノズル流路調節部材と、ディフューザの内部流路を調節するディフューザ流路調節部材を取り付けたことにより、駆動蒸気圧力が変動したり、吸引流体量の変動、あるいは、吐出圧力が変動しても、それぞれノズル部とディフューザの流路を調節することにより、エゼクタ効率を高く維持できるそれぞれの流体通過量を確保することができ、エゼクタ本来の機能を果たすことのできる蒸気エゼクタとすることができる。   The steam ejector of the present invention has a nozzle flow path adjustment member that adjusts the internal flow path of the nozzle portion and a diffuser flow path adjustment member that adjusts the internal flow path of the diffuser, so that the driving steam pressure fluctuates, Regardless of fluctuations in the amount of suction fluid or discharge pressure, by adjusting the flow path of the nozzle part and diffuser, it is possible to secure the respective fluid passage amounts that can maintain high ejector efficiency. The steam ejector can perform the following functions.

本発明は、ノズル部とディフューザにそれぞれ流路調節部材を取り付けるものであり、この流路調節部材としては、ノズル部とディフューザの流路を連続的に且つ精度良く調節することのできる、針状弁すなわちニードル弁を用いることが好ましい。   The present invention attaches a flow path adjusting member to each of the nozzle part and the diffuser, and as the flow path adjusting member, a needle-like shape capable of continuously and accurately adjusting the flow path of the nozzle part and the diffuser. Preferably, a valve or needle valve is used.

図１において、減圧弁１と、エゼクタ２２と、エゼクタ２２のディフューザ４の出口側部と減圧弁１の二次側圧力検出口３とを接続する管路５とで蒸気エゼクタを構成する。   In FIG. 1, a steam ejector is configured by a pressure reducing valve 1, an ejector 22, and a pipe line 5 that connects an outlet side portion of a diffuser 4 of the ejector 22 and a secondary pressure detection port 3 of the pressure reducing valve 1.

減圧弁１は、自力式圧力調整弁としての減圧弁であり、二次側圧力検出口３に管路５からディフューザ４の出口側の圧力が印加され、図示しないダイヤフラム等の感圧部材の一面にその圧力が印加されることにより、ディフューザ４の出口側圧力を所定値に維持することができるものである。   The pressure reducing valve 1 is a pressure reducing valve as a self-acting pressure adjusting valve. The pressure on the outlet side of the diffuser 4 is applied to the secondary pressure detecting port 3 from the duct 5, and one surface of a pressure sensitive member such as a diaphragm (not shown). By applying this pressure, the outlet side pressure of the diffuser 4 can be maintained at a predetermined value.

減圧弁１の入口側には高圧蒸気源と連通している蒸気管８を接続すると共に、減圧弁１の出口側は、エゼクタ２２の駆動蒸気口１０と接続する。エゼクタ２２は、ノズル部２と吸込室６とディフューザ４とで構成する。ノズル部２には、ノズル流路調節部材としてのノズル部ニードル弁７を、左右方向に進退自在にねじ結合により取り付ける。また、ディフューザ４内にも、ディフューザ流路調節部材としてのディフューザ部ニードル弁９を、左右方向に進退自在にねじ結合により取り付ける。   A steam pipe 8 communicating with a high pressure steam source is connected to the inlet side of the pressure reducing valve 1, and the outlet side of the pressure reducing valve 1 is connected to the driving steam port 10 of the ejector 22. The ejector 22 includes the nozzle portion 2, the suction chamber 6, and the diffuser 4. A nozzle part needle valve 7 as a nozzle flow path adjusting member is attached to the nozzle part 2 by screw connection so as to be movable back and forth in the left-right direction. Also in the diffuser 4, a diffuser portion needle valve 9 as a diffuser flow path adjusting member is attached by screw coupling so as to be movable back and forth in the left-right direction.

ノズル部ニードル弁７の左端には、ニードル弁７を回転操作するためのハンドル２０を取り付ける。また、ディフューザ部ニードル弁９の右端にもハンドル２１を取り付ける。ハンドル２０を回転操作してノズル部ニードル弁７を右方向へ移動させることにより、ノズル部２の流路面積を徐々に小さくすることができ、また、ハンドル２１を回転操作してディフューザ部ニードル弁９を左方向へ移動させることにより、ディフューザ４内の流路面積を徐々に小さくすることができるものである。上記とは反対方向にニードル弁７，９を移動させることにより、それぞれの流路を大きくすることができる。   A handle 20 for rotating the needle valve 7 is attached to the left end of the nozzle needle valve 7. A handle 21 is also attached to the right end of the diffuser needle valve 9. By rotating the handle 20 and moving the nozzle part needle valve 7 to the right, the flow area of the nozzle part 2 can be gradually reduced, and the handle 21 is operated to rotate the diffuser part needle valve. By moving 9 in the left direction, the flow passage area in the diffuser 4 can be gradually reduced. By moving the needle valves 7 and 9 in the opposite direction, the respective flow paths can be enlarged.

本実施例においては、減圧弁１の管路５の一端をディフューザ４から離れた出口側部２３に接続した例を示したが、管路５の一端はディフューザ４から離れることなくディフューザ４内の出口側に接続することもできる。管路５の一端部は、出口側管２３から図示しない蒸気使用装置等へ供給されるプロセス蒸気圧力を検出できる位置に接続することが好ましい。なお、エゼクタ２２の吸込室６の下端には、吸込室６で吸引する流体の流入する吸込通路１２を設ける。 In the present embodiment, an example is shown in which one end of the pipe line 5 of the pressure reducing valve 1 is connected to the outlet side portion 23 separated from the diffuser 4. However, one end of the pipe line 5 is not separated from the diffuser 4. It can also be connected to the exit side. One end of the pipe 5 is preferably connected to a position where the process steam pressure supplied from the outlet side pipe 23 to a steam using device (not shown) or the like can be detected. A suction passage 12 into which a fluid sucked in the suction chamber 6 flows is provided at the lower end of the suction chamber 6 of the ejector 22.

吸込通路１２の下部には再蒸発タンク１３を接続する。再蒸発タンク１３は縦長円筒状で、左側面上部に高温復水流入管１４を接続すると共に、右側面下部に復水排出管１５を接続する。復水排出管１５には蒸気トラップ１６を介在する。   A reevaporation tank 13 is connected to the lower part of the suction passage 12. The re-evaporation tank 13 has a vertically long cylindrical shape, and a high-temperature condensate inflow pipe 14 is connected to the upper left side and a condensate discharge pipe 15 is connected to the lower right side. A steam trap 16 is interposed in the condensate discharge pipe 15.

再蒸発タンク１３の内部で、高温復水流入管１４から流入してきた高温復水が再蒸発して再び蒸気となり、吸込通路１２からエゼクタの吸込室６へ吸引される。再蒸発してある程度温度の低下した復水は、蒸気トラップ１６を通って復水排出管１５から系外へ排出される。   Inside the re-evaporation tank 13, the high-temperature condensate flowing from the high-temperature condensate inflow pipe 14 is re-evaporated and becomes steam again, and is sucked from the suction passage 12 into the suction chamber 6 of the ejector. Condensate whose temperature has decreased to some extent after re-evaporation passes through the steam trap 16 and is discharged from the condensate discharge pipe 15 to the outside of the system.

蒸気管８から供給される高圧蒸気は、減圧弁１で所定圧力まで減圧されてエゼクタ２２のノズル部２へ供給され、このノズル部２で駆動蒸気は絞られて高速流となることによって、吸引力を発生して吸込通路１２から再蒸発蒸気を吸引する。吸引された再蒸発蒸気は駆動蒸気と混合されてディフューザ４を通って出口側管２３から蒸気使用装置等へ供給される。   The high-pressure steam supplied from the steam pipe 8 is decompressed to a predetermined pressure by the pressure reducing valve 1 and supplied to the nozzle part 2 of the ejector 22, and the driving steam is squeezed by the nozzle part 2 to become a high-speed flow. A force is generated to suck re-evaporated vapor from the suction passage 12. The sucked re-evaporated steam is mixed with the driving steam and supplied to the steam using device or the like from the outlet side pipe 23 through the diffuser 4.

出口側管２３を通過する蒸気圧力は、管路５を通って減圧弁１の二次側圧力検出口３へ伝達されることによって、減圧弁１のコイルバネ等で設定された設定圧力と等しい圧力値に維持される。   The vapor pressure passing through the outlet side pipe 23 is transmitted to the secondary side pressure detection port 3 of the pressure reducing valve 1 through the pipe line 5, thereby being equal to the set pressure set by the coil spring or the like of the pressure reducing valve 1. Maintained at the value.

エゼクタ２２の駆動蒸気口１０からの蒸気量が変動したり、吸込室６への再蒸発蒸気の量が変動したり、あるいは、出口側管２３への吐出蒸気量が変動する場合は、ノズル部ニードル弁７とディフューザ部ニードル弁９を適宜回転操作して、ノズル部２とディフューザ４での流路面積を調節することにより、エゼクタ効率を高く維持できるそれぞれの流体通過量を確保することができ、エゼクタ２２本来の機能を果たすことができる。   If the amount of steam from the drive steam port 10 of the ejector 22 varies, the amount of re-evaporated steam to the suction chamber 6 varies, or the amount of discharged steam to the outlet side pipe 23 varies, the nozzle portion By appropriately rotating the needle valve 7 and the diffuser part needle valve 9 to adjust the flow passage area in the nozzle part 2 and the diffuser 4, it is possible to secure the respective fluid passage amounts capable of maintaining high ejector efficiency. Thus, the original function of the ejector 22 can be achieved.

本発明の蒸気エゼクタの実施例を示す構成図。The block diagram which shows the Example of the steam ejector of this invention.

符号の説明Explanation of symbols

１ 減圧弁
２ ノズル部
３ 二次側圧力検出口
４ ディフューザ
５ 管路
６ 吸込室
７ ノズル部ニードル弁
８ 蒸気管
９ ディフューザ部ニードル弁
１０ 駆動蒸気口
１２ 吸込通路
１３ 再蒸発タンク
１４ 高温復水流入管
１５ 復水排出管
１６ 蒸気トラップ
２０，２１ ハンドル
２２ エゼクタ
２３ 出口側管
DESCRIPTION OF SYMBOLS 1 Pressure reducing valve 2 Nozzle part 3 Secondary side pressure detection port 4 Diffuser 5 Pipe line 6 Suction chamber 7 Nozzle part needle valve 8 Steam pipe 9 Diffuser part needle valve 10 Driving steam port 12 Suction passage 13 Re-evaporation tank 14 High temperature condensate inflow pipe 15 Condensate discharge pipe 16 Steam trap 20, 21 Handle 22 Ejector 23 Outlet pipe

Claims (1)

流体を絞る細孔からなるノズル部と、当該ノズル部の周囲に形成した吸込室と、当該吸込室及び上記ノズル部と連通したディフューザとからなるものにおいて、ノズル部の内部流路を調節するノズル流路調節部材と、ディフューザの内部流路を調節するディフューザ流路調節部材を取り付けると共に、ノズル部の入口側に減圧弁を接続して、当該減圧弁の二次側圧力検出口を、ディフューザ内の出口側部、又は、ディフューザの出口側部と接続したことを特徴とする蒸気エゼクタ。
A nozzle that adjusts the internal flow path of the nozzle part, comprising a nozzle part composed of pores for constricting fluid, a suction chamber formed around the nozzle part, and a diffuser communicating with the suction chamber and the nozzle part Attach the flow path adjusting member and the diffuser flow path adjusting member for adjusting the internal flow path of the diffuser, connect the pressure reducing valve to the inlet side of the nozzle part, and connect the secondary side pressure detection port of the pressure reducing valve to the inside of the diffuser. A steam ejector characterized in that it is connected to the outlet side portion of the above or the outlet side portion of the diffuser.
JP2007323252A 2007-12-14 2007-12-14 Steam ejector Expired - Fee Related JP5269407B2 (en)

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JP2009144609A true JP2009144609A (en) 2009-07-02
JP5269407B2 JP5269407B2 (en) 2013-08-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036956A1 (en) * 2009-09-28 2011-03-31 株式会社テイエルブイ Steam supply system and check valve used for same
WO2012092685A1 (en) * 2011-01-04 2012-07-12 Carrier Corporation Ejector
US10345018B2 (en) * 2016-10-27 2019-07-09 Lg Electronics Inc. Ejector and refrigeration cycle apparatus having ejector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200400A (en) * 1985-03-01 1986-09-04 Hitachi Ltd Ejector
JPH01196000A (en) * 1988-02-01 1989-08-07 Toshiba Corp Steam injector
JPH0687700U (en) * 1993-06-10 1994-12-22 株式会社神戸製鋼所 Ejector type mixing device
JP2003269400A (en) * 2002-03-14 2003-09-25 Tlv Co Ltd Steam ejector device
JP2004278871A (en) * 2003-03-14 2004-10-07 Tlv Co Ltd Condensate re-evaporation device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200400A (en) * 1985-03-01 1986-09-04 Hitachi Ltd Ejector
JPH01196000A (en) * 1988-02-01 1989-08-07 Toshiba Corp Steam injector
JPH0687700U (en) * 1993-06-10 1994-12-22 株式会社神戸製鋼所 Ejector type mixing device
JP2003269400A (en) * 2002-03-14 2003-09-25 Tlv Co Ltd Steam ejector device
JP2004278871A (en) * 2003-03-14 2004-10-07 Tlv Co Ltd Condensate re-evaporation device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036956A1 (en) * 2009-09-28 2011-03-31 株式会社テイエルブイ Steam supply system and check valve used for same
JP2011069335A (en) * 2009-09-28 2011-04-07 Tlv Co Ltd Steam supply system and check valve used for the same
CN102725537A (en) * 2009-09-28 2012-10-10 Tlv有限公司 Steam supply system and check valve used for same
US8881761B2 (en) 2009-09-28 2014-11-11 Tlv Co., Ltd. Steam supply system and check valve for use therein
AU2010299261B2 (en) * 2009-09-28 2015-07-16 Tlv Co., Ltd. Steam supply system and check valve for use therein
WO2012092685A1 (en) * 2011-01-04 2012-07-12 Carrier Corporation Ejector
US9285146B2 (en) 2011-01-04 2016-03-15 Carrier Corporation Ejector
US9696069B2 (en) 2011-01-04 2017-07-04 Carrier Corporation Ejector
US10345018B2 (en) * 2016-10-27 2019-07-09 Lg Electronics Inc. Ejector and refrigeration cycle apparatus having ejector

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