JPH0684165U - Geothermal power plant gas extractor - Google Patents
Geothermal power plant gas extractorInfo
- Publication number
- JPH0684165U JPH0684165U JP1740793U JP1740793U JPH0684165U JP H0684165 U JPH0684165 U JP H0684165U JP 1740793 U JP1740793 U JP 1740793U JP 1740793 U JP1740793 U JP 1740793U JP H0684165 U JPH0684165 U JP H0684165U
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- gas
- condenser
- power plant
- geothermal power
- 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
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
(57)【要約】
【目的】 地熱発電プラントの起動、停止時に復水器に
滞留するガスを抽出するコンプレッサがサージング状態
に入るのを防止すること。
【構成】 コンプレッサ14の吐出系統16に流量計19を設
置する。この流量計19下流側より分岐し、調節弁18を介
して復水器11へガスを再循環させるガス再循環系統17を
設ける。また、コンプレッサ14の吸込系統15に開閉弁21
を備えた空気導入系統20を接続する。
(57) [Summary] [Purpose] To prevent the compressor, which extracts the gas accumulated in the condenser when starting and stopping the geothermal power plant, from entering the surging state. [Configuration] A flow meter 19 is installed in the discharge system 16 of the compressor 14. A gas recirculation system 17 is provided which branches from the downstream side of the flow meter 19 and recirculates the gas to the condenser 11 via the control valve 18. In addition, the intake system 15 of the compressor 14 has an open / close valve 21
The air introduction system 20 provided with is connected.
Description
【０００１】[0001]
本考案は地熱蒸気を用いて発電する地熱発電プラントのガス抽出装置に関する 。 The present invention relates to a gas extraction device for a geothermal power plant that generates electricity using geothermal steam.
【０００２】[0002]
地熱蒸気を利用して発電する地熱発電プラントの一例を図３に示す。 地熱蒸気の持つ熱エネルギーは蒸気タージ10で、回転エネルギーに変換される 。蒸気タービン10を出た低温低圧の地熱蒸気は復水器11へと導かれる。復水器11 に流れた地熱蒸気は冷却搭12からの冷却水と直接接触し、液化する。液化した地 熱水は循環ポンプ13により冷却搭12へ送られ、冷却搭12内で地熱水より蒸発熱を 奪われて冷却水となる。ここで、復水器11の内部圧力は低いほど蒸気タービン10 で多くの仕事ができるため、発電プラントの熱効率は高くなるが、地熱蒸気中に 含まれる不凝縮ガス分が復水器11の内部圧力を上昇させるため、コンプレッサ14 にて復水器11内の不凝縮ガス分を除去し、器内圧力を低く保持している。 FIG. 3 shows an example of a geothermal power plant that uses geothermal steam to generate power. The thermal energy of geothermal steam is converted into rotational energy at steam stage 10. The low-temperature low-pressure geothermal steam exiting the steam turbine 10 is guided to the condenser 11. The geothermal steam flowing to the condenser 11 directly contacts the cooling water from the cooling tower 12 and liquefies. The liquefied geothermal water is sent to the cooling tower 12 by the circulation pump 13, and the evaporation heat is taken from the geothermal water in the cooling tower 12 to become cooling water. Here, the lower the internal pressure of the condenser 11, the more work can be done in the steam turbine 10, so the thermal efficiency of the power plant will be higher, but the non-condensable gas component contained in the geothermal steam will be inside the condenser 11. In order to increase the pressure, the compressor 14 removes the non-condensable gas component in the condenser 11 to keep the internal pressure low.
【０００３】 発電プラントの低負荷時には、復水器11内部での不凝縮ガス量が低下し、コン プレッサ14の定格吸込流量に対して、少ない流量で運転されるため、コンプレッ サ14がサージング域に入るのを防ぐ必要があり、コンプレッサ吐出系統16から復 水器11に調節弁18を介して戻るガス再循環系統17が設けられている。調節弁18は コンプレッサ吐出系統16に設けられた流量計19と連動しており、コンプレッサ吐 出流量を監視してサージング域に入らないように調節弁18の開度が調節される。When the load of the power plant is low, the amount of non-condensable gas inside the condenser 11 decreases, and the compressor 14 is operated at a smaller flow rate than the rated suction flow rate, so the compressor 14 is in the surging region. A gas recirculation system 17 is provided which has to be prevented from entering the compressor and returns from the compressor discharge system 16 to the condenser 11 via a control valve 18. The control valve 18 is linked with a flow meter 19 provided in the compressor discharge system 16, and the opening of the control valve 18 is adjusted by monitoring the compressor discharge flow rate so as not to enter the surging area.
【０００４】[0004]
プラント負荷運転中はタービン駆動蒸気中に含まれるガス分が復水器11内に供 給されるため、調節弁18を開けガス再循環系統17を利用することにより、コンプ レッサ14のサージングを防止できるが、プラント起動時の低負荷帯や復水器真空 を保持したまま、蒸気タービン10を停止しておく場合には、ガス再循環系統17に 設けられた調節弁18を開けても、コンプレッサ14のサージングを防止するのに必 要なガス流量を得られない。このため、コンプレッサ14がサージング状態に入り 、コンプレッサ14が損傷する可能性がある。 During the plant load operation, the gas component contained in the turbine driving steam is supplied to the condenser 11.Therefore, by opening the control valve 18 and using the gas recirculation system 17, the surging of the compressor 14 is prevented. However, if the steam turbine 10 is stopped while maintaining the low load zone and condenser vacuum at the time of plant startup, even if the control valve 18 provided in the gas recirculation system 17 is opened, 14 The gas flow rate required to prevent surging cannot be obtained. Therefore, the compressor 14 may enter the surging state, and the compressor 14 may be damaged.
【０００５】 そこで、考案の目的は地熱発電プラントの起動、停止時に復水管に滞留するガ スを抽出するコンプレッサがサージング状態に入るのを防止するようにした地熱 発電プラントのガス抽出装置を提供することにある。Therefore, an object of the invention is to provide a gas extraction device for a geothermal power plant, which prevents a compressor, which extracts gas accumulated in the condensate pipe when starting or stopping the geothermal power plant, from entering a surging state. Especially.
【０００６】[0006]
上記目的を達成するために本考案は、コンプレッサ吸込系統に開閉弁を備えた 空気導入系統を接続し、コンプレッサ吐出ガス流量と、ガス再循環系統に設けら れた調節弁開度とに基づいて、上記開閉弁を開閉制御することを特徴とするもの である。 In order to achieve the above object, the present invention connects an air intake system equipped with an on-off valve to a compressor suction system, and based on the compressor discharge gas flow rate and a control valve opening degree provided in a gas recirculation system. The on / off valve is controlled to be opened / closed.
【０００７】[0007]
コンプレッサは規定流量以上流さないと、サージング域に入り損傷の虞れがあ るため、ガス流量の少ない時にはガス再循環系統を通してガスを再循環させてい るが、ガス分が少ないときにはこの方法が用いられない。 Since the compressor may enter the surging area and be damaged if it does not flow beyond the specified flow rate, the gas is recirculated through the gas recirculation system when the gas flow rate is low, but this method is used when the gas content is low. I can't.
【０００８】 そこで、空気導入系統から空気が流れるように空気導入系統の開閉弁が開けら れる。すなわち、コンプレッサ吐出ガス流量と調節弁開度とを検出して規定され る値で開閉弁が開くように制御する。こうして、空気導入系統を通して空気が導 入され、サージング域に入ることが防止される。Therefore, the opening / closing valve of the air introduction system is opened so that the air flows from the air introduction system. That is, the on-off valve is controlled to open at a specified value by detecting the compressor discharge gas flow rate and the control valve opening. Air is thus introduced through the air introduction system and prevented from entering the surging area.
【０００９】[0009]
以下、本考案の一実施例について図１を参照して説明する。 図１において、復水器11とコンプレッサ14とはコンプレッサ吸込系統15により 結ばれている。コンプレッサ吐出系統16には流量計19が設置されており、流量計 下流のコンプレッサ吐出系統より分岐して復水器11とを連絡するガス再循環系統 17が設けられている。ガス再循環系統17には調節弁18が設置され、流量計19より の信号により調節弁開度が設定される。 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the condenser 11 and the compressor 14 are connected by a compressor suction system 15. A flow meter 19 is installed in the compressor discharge system 16, and a gas recirculation system 17 that branches from the compressor discharge system downstream of the flow meter and connects the condenser 11 is provided. A control valve 18 is installed in the gas recirculation system 17, and a control valve opening degree is set by a signal from a flow meter 19.
【００１０】 さらに、コンプレッサ吸込系統15には、空気導入系統20が接続され、空気導入 系統20には開閉弁21が設けられている。 次に、上記の構成によるところの作用を説明する。Further, an air introducing system 20 is connected to the compressor suction system 15, and an opening / closing valve 21 is provided in the air introducing system 20. Next, the operation of the above configuration will be described.
【００１１】 発電プラントの通常運転中において、蒸気タービン10で仕事を終えた流体中の 水蒸気は、復水器11にて凝縮し液体となるが、ガス分は復水器11の内部に滞留す るため、コンプレッサ吸込系統15を介してコンプレッサ14により抽出される。コ ンプレッサ14は規定流量以上流さないとサージング域に入り、損傷の虞れがある ため、流量計19で検出したガス流量の少ない時にはガス再循環系統17に設けられ た調節弁18が開き、コンプレッサ必要流量が確保される。During normal operation of the power plant, water vapor in the fluid that has finished its work in the steam turbine 10 is condensed in the condenser 11 to become a liquid, but the gas component stays inside the condenser 11. Therefore, it is extracted by the compressor 14 via the compressor suction system 15. If the flow rate of the compressor 14 does not exceed the specified flow rate, it may enter the surging area and be damaged.Therefore, when the gas flow rate detected by the flow meter 19 is low, the control valve 18 provided in the gas recirculation system 17 opens and the compressor The required flow rate is secured.
【００１２】 また、プラント起動時や復水器内部真空保持中には蒸気タービン10を通して復 水器11に新たに供給されるガス分がほとんどなくなるが、コンプレッサ吐出流量 がサージング防止のための必要流量以下で、なおかつ調節弁18が全開状態の時に 開閉弁21が開く。このとき空気導入系統20から空気が吸い込まれ、コンプレッサ 14がサージング運転とならないように保護される。Further, when the plant is started up or the vacuum inside the condenser is maintained, almost no gas is newly supplied to the condenser 11 through the steam turbine 10, but the compressor discharge flow rate is the required flow rate for preventing surging. In the following, the on-off valve 21 is opened while the control valve 18 is fully open. At this time, the air is sucked from the air introduction system 20, and the compressor 14 is protected from the surging operation.
【００１３】 なお、図１に示す実施例では、コンプレッサ吸込系統15に空気導入系統20を接 続するようにしたが、図２に示すように、空気導入系統22を直接復水器11に接続 してもよい。本実施例においても、同様の効果を得ることができる。In the embodiment shown in FIG. 1, the air introduction system 20 is connected to the compressor suction system 15, but the air introduction system 22 is directly connected to the condenser 11 as shown in FIG. You may. Also in this embodiment, the same effect can be obtained.
【００１４】[0014]
以上述べたように本考案によれば、コンプレッサ再循環系統の他に、空気導入 系統を設置することにより、あらゆるプラント運用状態に対してコンプレッサが サージング域に入ることなく運転することができ、信頼性の高今地熱発電プラン トを提供できるという効果を奏する。 As described above, according to the present invention, by installing the air introduction system in addition to the compressor recirculation system, it is possible to operate the compressor without entering the surging area for all plant operating conditions, and it is reliable. The effect of being able to provide a highly efficient geothermal power plant.
【図１】本考案による地熱発電プラントのガス抽出装置
の一実施例を示す系統図。FIG. 1 is a system diagram showing an embodiment of a gas extraction device for a geothermal power plant according to the present invention.
【図２】本考案の他の実施例を示す系統図。FIG. 2 is a system diagram showing another embodiment of the present invention.
【図３】従来の地熱発電プラントのガス抽出装置を示す
系統図。FIG. 3 is a system diagram showing a gas extraction device of a conventional geothermal power plant.
11…復水器、 14…コンプレッサ、17…ガ
ス再循環系統、 18…調節弁、19…流量計、
20，22…空気導入系統、21…開閉弁。11 ... Condenser, 14 ... Compressor, 17 ... Gas recirculation system, 18 ... Control valve, 19 ... Flowmeter,
20, 22 ... Air introduction system, 21 ... Open / close valve.
Claims (3)
サにて抽出するようにしたものにおいて、前記コンプレ
ッサの吐出系統に流量計を設置し、流量計下流より分岐
し、調節弁を介して該復水器へガスを再循環させる系統
を設けるとともに、コンプレッサの吸込系統に開閉弁を
備えた空気導入系統を接続したことを特徴とする地熱発
電プラントのガス抽出装置。1. In a system in which a gas component accumulated in a condenser is extracted by a compressor, a flow meter is installed in a discharge system of the compressor, a flow meter is branched from a downstream side of the flow meter, and a control valve is provided. A gas extraction device for a geothermal power plant, wherein a system for recirculating gas to the condenser is provided and an air introduction system having an on-off valve is connected to a suction system of a compressor.
量と調節弁開度とに基づいて制御されることを特徴とす
る請求項１記載の地熱発電プラントのガス抽出装置。2. The gas extraction device for a geothermal power plant according to claim 1, wherein the on-off valve is controlled based on a compressor discharge gas flow rate and a control valve opening degree.
ることを特徴とする請求項１記載の地熱発電プラントの
ガス抽出装置。3. The gas extraction device for a geothermal power plant according to claim 1, wherein the air introduction system is connected to the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1740793U JPH0684165U (en) | 1993-04-08 | 1993-04-08 | Geothermal power plant gas extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1740793U JPH0684165U (en) | 1993-04-08 | 1993-04-08 | Geothermal power plant gas extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0684165U true JPH0684165U (en) | 1994-12-02 |
Family
ID=11943150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1740793U Pending JPH0684165U (en) | 1993-04-08 | 1993-04-08 | Geothermal power plant gas extractor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0684165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011169207A (en) * | 2010-02-17 | 2011-09-01 | Tohoku Suiryoku Chinetsu Kk | Gas extraction system of steam turbine plant, gas extraction operating method, and constructing method of gas extraction system |
-
1993
- 1993-04-08 JP JP1740793U patent/JPH0684165U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011169207A (en) * | 2010-02-17 | 2011-09-01 | Tohoku Suiryoku Chinetsu Kk | Gas extraction system of steam turbine plant, gas extraction operating method, and constructing method of gas extraction system |
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