JPS62150085A - Energy recovery method in under-ground reinjection for geothermal gas - Google Patents

Energy recovery method in under-ground reinjection for geothermal gas

Info

Publication number
JPS62150085A
JPS62150085A JP29044685A JP29044685A JPS62150085A JP S62150085 A JPS62150085 A JP S62150085A JP 29044685 A JP29044685 A JP 29044685A JP 29044685 A JP29044685 A JP 29044685A JP S62150085 A JPS62150085 A JP S62150085A
Authority
JP
Japan
Prior art keywords
gas
geothermal
duct
power plant
expansion turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP29044685A
Other languages
Japanese (ja)
Inventor
Kenjiro Ishii
石井　健二郎
Nobuhiko Hara
信彦 原
Mutsuo Kuragasaki
倉ケ崎　六夫
Sanae Kawazoe
川添　早苗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP29044685A priority Critical patent/JPS62150085A/en
Publication of JPS62150085A publication Critical patent/JPS62150085A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To aim at enhancing the thermal efficiency of a geothermal power plant, by pressurizing and cooling discharged gas from the geothermal power plant to liquefy and separate a specific gas component, and by introducing the pressurized residual gas is introduced into an expansion turbine to recover energy. CONSTITUTION:Geothermal gas extracted from a condenser or the like, is led through a duct 1 into a compressor 2 in which the gas is compressed, and is cooled down in a cooler 3 by coolant flowing through a duct 4. Thereby a specific gas component in the geothermal gas is liquiefied and is separated in a separation and absorption tank 5, and then it is reinjected into the underground from a duct 6 through a heat-exchanger. Meanwhile uncondensed gas is led into an expansion turbine 8 in a high pressure condition, and the thus obtained rotation of the turbine 8 is transmitted to a compressor 2 so that it is possible to recover energy. Thereafter the gas is discharged. Thus, it is possible to aim at recovering the energy and to enhance the thermal efficiency of the geothermal power plant.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、地熱プラントから排出される地熱ガスを地下
還元する際のエネルギ回収方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for recovering energy when geothermal gas discharged from a geothermal plant is returned underground.

従来の技術 従来は、地熱プラントから排出される地熱ガスを圧縮、
冷却することにより特定ガスを液化分離し、その際残留
せる圧縮ガスをそのまま大気に放出している。Conventional technology Conventionally, geothermal gas discharged from geothermal plants was compressed,
By cooling, the specific gas is liquefied and separated, and the remaining compressed gas is released directly into the atmosphere.

発明が解決しようとする問題点 このような従来技術では、したがって、少量特定ガスの
数倍〜数十倍もの多量の不凝結ガスをも同時に圧縮、冷
却せねばならず、そのためのエネルギが膨大なものとな
る。Problems to be Solved by the Invention In such conventional techniques, therefore, it is necessary to simultaneously compress and cool a large amount of non-condensable gas, several times to several tens of times as large as a small amount of specific gas, and the energy required to do so is enormous. Become something.

本発明は、このような従来の問題点を解決するためにな
されたもので、圧縮された不凝結ガスのエネルギを有効
に回収することを目的とする。The present invention was made to solve these conventional problems, and aims to effectively recover the energy of compressed non-condensable gas.

問題点を解決するための手段 本発明は、この目的を達成するために、地熱プラントよ
り排出されるガスを加圧、冷却することにより特定ガス
成分を液化分離させ、その加圧された残留ガスを膨脹タ
ービンに導くことによりエネルギを回収するようにした
ものである。Means for Solving the Problems In order to achieve this objective, the present invention liquefies and separates specific gas components by pressurizing and cooling gas discharged from a geothermal plant, and extracts the pressurized residual gas. The energy is recovered by guiding it to an expansion turbine.

作用 このような方法によれば、したがって、地熱ガスの有効
なエネルギ回収をなすことができ、膨脹タービンを系統
の圧縮機又は他の補機と接続させることにより動力の回
収を計り、またその排気ガス又は液化部を熱交換器に導
くことにより熱効率の向上が計れる。According to this method, effective energy recovery of geothermal gas can be achieved, and the power can be recovered by connecting the expansion turbine to the compressor or other auxiliary equipment of the system, and its exhaust gas can be recovered. Thermal efficiency can be improved by guiding the gas or liquefied part to a heat exchanger.

実施例 以下図面を参照して本発明の好適な実施例について詳述
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

単一の図において、地熱ガスは、図示されない復水器等
から抽出され、導管１を経て圧縮機２に導かれる。ここ
で圧縮されたガスは、冷却器（熱交換器）３で導管４に
よって流通される冷媒によって冷却され、特定ガス成分
を液化し、分離吸収槽５で不凝結ガス成分と液化成分と
に完全に分けられ、液化成分は系外に排出されて地下に
還元される。In the single figure, geothermal gas is extracted from a condenser or the like (not shown) and led via conduit 1 to compressor 2 . The compressed gas is cooled by a refrigerant flowing through a conduit 4 in a cooler (heat exchanger) 3, liquefies specific gas components, and is completely separated into non-condensable gas components and liquefied components in a separation absorption tank 5. The liquefied components are discharged outside the system and returned to the underground.

一方、不凝結ガスは高圧に圧縮されたま＼なので、これ
を導管７を通して膨脹タービン８に導く。On the other hand, since the non-condensable gas remains compressed to a high pressure, it is guided to the expansion turbine 8 through the conduit 7.

そして、この膨脹タービンを本系統の圧縮機２に接ｒ・ 続することにより動力の回収を計る。また、この膨脹タ
ービン８を他の図示されな（・補機の駆動用としても使
用出来る。Power is then recovered by connecting this expansion turbine to the compressor 2 of the main system. Further, this expansion turbine 8 can also be used to drive other auxiliary equipment (not shown).

その上、膨脹タービン８の排気は、十分冷却されている
ので、導管４の系統に設けられた熱交換Ｊ 器９に導き、冷媒の温度を下げることに使用するｔとも
できるし、又は直接熱交換＝ＦＡ導くこともできる。一
方、系外如排出される液化成分を導管６に設けられた熱
交換器１１に導いて、熱回収を計ることも出来る。Moreover, since the exhaust gas of the expansion turbine 8 is sufficiently cooled, it can be led to a heat exchanger 9 provided in the conduit 4 system and used to lower the temperature of the refrigerant, or it can be used to directly generate heat. Exchange = FA can also be derived. On the other hand, it is also possible to recover heat by guiding the liquefied components discharged outside the system to the heat exchanger 11 provided in the conduit 6.

発明の効果 以上詳述したように、本発明によれば、地熱ガの回収が
計れ、またその排気及び／又は液化成分をそれぞれの熱
交換器に導くことにより熱効率の向上が計れる。Effects of the Invention As detailed above, according to the present invention, geothermal gas can be recovered, and thermal efficiency can be improved by guiding its exhaust gas and/or liquefied components to the respective heat exchangers.

【図面の簡単な説明】[Brief explanation of drawings]

る。 １・・導管、２・・圧縮機、３・・冷却器、４・・導管
、５・・分離吸収槽、６，７・・導管、８・・膨脹ター
ビン、９・・熱交換器、１０・・ポンプ、１１，１２・
・熱交換器。 （ほか／荀Ru. 1. Conduit, 2. Compressor, 3. Cooler, 4. Conduit, 5. Separation absorption tank, 6, 7. Conduit, 8. Expansion turbine, 9. Heat exchanger, 10・・Pump, 11, 12・
·Heat exchanger. (Others/Xun

Claims (1)

【特許請求の範囲】[Claims] 地熱プラントより排出されるガスを加圧、冷却すること
により特定ガス成分を液化分離させ、その加圧された残
留ガスを膨脹タービンに導くことによりエネルギを回収
するようにしたことを特徴とする地熱ガス地下還元にお
けるエネルギ回収方法。A geothermal system characterized by pressurizing and cooling the gas discharged from a geothermal plant to liquefy and separate specific gas components, and recovering energy by guiding the pressurized residual gas to an expansion turbine. Energy recovery method in gas underground reduction.
JP29044685A 1985-12-25 1985-12-25 Energy recovery method in under-ground reinjection for geothermal gas Pending JPS62150085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29044685A JPS62150085A (en) 1985-12-25 1985-12-25 Energy recovery method in under-ground reinjection for geothermal gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29044685A JPS62150085A (en) 1985-12-25 1985-12-25 Energy recovery method in under-ground reinjection for geothermal gas

Publications (1)

Publication Number Publication Date
JPS62150085A true JPS62150085A (en) 1987-07-04

Family

ID=17756134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29044685A Pending JPS62150085A (en) 1985-12-25 1985-12-25 Energy recovery method in under-ground reinjection for geothermal gas

Country Status (1)

Country Link
JP (1) JPS62150085A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63130088U (en) * 1987-02-19 1988-08-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63130088U (en) * 1987-02-19 1988-08-25
JPH0546791Y2 (en) * 1987-02-19 1993-12-08

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