JP2005069012A - Fuel gas supply device - Google Patents

Fuel gas supply device Download PDF

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Publication number
JP2005069012A
JP2005069012A JP2003208467A JP2003208467A JP2005069012A JP 2005069012 A JP2005069012 A JP 2005069012A JP 2003208467 A JP2003208467 A JP 2003208467A JP 2003208467 A JP2003208467 A JP 2003208467A JP 2005069012 A JP2005069012 A JP 2005069012A
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JP
Japan
Prior art keywords
fuel gas
compressor
check valve
supply device
gas supply
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
JP2003208467A
Other languages
Japanese (ja)
Inventor
Toshiaki Tsuchiya
利明 土屋
Masanori Okamoto
正範 岡本
Hiroshi Sato
浩 佐藤
Daisuke Kawamata
大祐 川又
Hiroshi Nishikawa
弘 西川
Takehiro Nishikawa
剛弘 西川
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.)
Sanyo Electric Co Ltd
Tokyo Gas Co Ltd
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Sanyo Electric Co Ltd
Tokyo Gas Co 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 Tokyo Electric Power Co Inc, Sanyo Electric Co Ltd, Tokyo Gas Co Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP2003208467A priority Critical patent/JP2005069012A/en
Publication of JP2005069012A publication Critical patent/JP2005069012A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel gas supply device capable of smoothly returning a part of fuel gas delivered from a compressor to the suction side of the compressor, without causing turbulence in a suction flow of the fuel gas in a suction pipe of the compressor. <P>SOLUTION: This fuel gas supply device supplies the fuel gas to a load 16 by boosting pressure of this fuel gas to a prescribed pressure by compressing the fuel gas by the compressor 7. The fuel gas supply device has a check valve 5 arranged on the suction side of the compressor 7, and a bypass return circuit 21 for returning a part of the fuel gas delivered from this compressor 7 to the suction side for controlling a delivery quantity. This bypass return circuit 21 is connected between the check valve 5 and the compressor 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、例えば、2kPa程度の燃料ガスを600kPa程度にまで昇圧して負荷に供給する燃料ガス供給装置に関する。
【0002】
【従来の技術】
一般に、都市ガス、LPG、バイオガス等の燃料ガスを、インバータ制御によるレシプロ型圧縮機により圧縮して、この燃料ガスの圧力を600kPa程度の圧力に昇圧させて、マイクロガスタービン等の負荷に供給する燃料ガス供給装置が知られている(例えば、特許文献1)。
【0003】
この種のものでは、燃料ガス圧力の昇圧幅が大きいため、レシプロ型圧縮機から吐出された燃料ガスの一部を圧力異常上昇防止のために吸込側に戻すリリーフ回路や、当該圧縮機から吐出された燃料ガスの一部を吐出量制御のために吸込側に戻すバイパス戻し回路等が必要になる。
【0004】
【特許文献1】
特開平6−11099号公報
【0005】
【発明が解決しようとする課題】
しかし、従来のように、レシプロ型圧縮機から吐出された燃料ガスの一部を吸込側に戻す場合、燃料ガスの吐出脈動が影響して、圧縮機の吸込管内における燃料ガスの吸込流れに乱れが発生する等の問題がある。
【0006】
そこで、本発明の目的は、上述した従来の技術が有する課題を解消し、圧縮機の吸込管内における燃料ガスの吸込流れに乱れを発生させることなく、圧縮機から吐出された燃料ガスの一部を当該圧縮機の吸込側に円滑に戻すことができる燃料ガス供給装置を提供することにある。
【0007】
【課題を解決するための手段】
請求項1記載の発明は、圧縮機により燃料ガスを圧縮してこの燃料ガスの圧力を所定の圧力に昇圧させて負荷に供給する燃料ガス供給装置において、前記圧縮機の吸込側に設けられた逆止弁と、この圧縮機から吐出された燃料ガスの一部を吐出量制御のために吸込側に戻すバイパス戻し回路とを備え、このバイパス戻し回路を前記逆止弁と前記圧縮機との間に接続したことを特徴とする。
【0008】
請求項2記載の発明は、圧縮機により燃料ガスを圧縮してこの燃料ガスの圧力を所定の圧力に昇圧させて負荷に供給する燃料ガス供給装置において、前記圧縮機の吸込側に設けられた逆止弁と、この圧縮機から吐出された燃料ガスの一部を圧力異常上昇防止のために吸込側に戻すリリーフ回路とを備え、このリリーフ回路を前記逆止弁と前記圧縮機との間に接続したことを特徴とする。
【0009】
請求項3記載の発明は、請求項1又は2記載のものにおいて、前記逆止弁と前記圧縮機との間にバッファタンクを備えたことを特徴とする。
【0010】
請求項4記載の発明は、請求項1乃至3のいずれか一項記載のものにおいて、前記圧縮機の吐出側にリザーバタンクを備えたことを特徴とする。
【0011】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
【0012】
図1において、100はマイクロガスタービン用燃料ガス供給装置を示している。この燃料ガス供給装置100はガス入口1を有し、このガス入口1には下流に向けて低圧圧力スイッチ2、塵埃除去用のストレーナ3、電磁弁(吸入遮断弁)4、逆止弁5が順に接続されている。この逆止弁5には、燃料ガスの圧力を平衡圧とするバッファタンク6、レシプロ型圧縮機7が接続され、更に逆止弁8を介して高圧圧力スイッチ9、吐出圧力の脈動を防止するリザーバタンク10が順に接続されている。13はガス出口である。
【0013】
レシプロ型圧縮機7と逆止弁8との間には戻り管20が接続されている。この戻り管20は、2本に分岐されて、一方の分岐管(バイパス戻し回路)21にはバイパスガス容量制御弁11が接続され、他方の分岐管(リリーフ回路)22にはリリーフ弁12が接続されている。これら各回路21,22は、合流管23に合流し、この合流管23は、逆止弁5とバッファタンク6の間に接続されている。14は、圧縮機冷却用のファンである。この圧縮機7は、インバータ制御回路15によって駆動制御される。
【0014】
燃料ガス供給装置100を経たガスは、ガス出口13を通じてマイクロガスタービン(負荷)16に送られ、このマイクロガスタービン16を駆動する。この燃料ガス供給装置100は、ガス入口1を通じて供給される例えば2kPa程度の都市ガス、LPG、バイオガス等の燃料ガスを昇圧させた後、ガス出口13を通じて、マイクロガスタービン16に供給する装置であり、ガス出口13では、600kPa程度にまで圧縮されている。
【0015】
次に、本実施形態の動作を説明する。
【0016】
圧縮機7が駆動制御されると、これに連動し電磁弁4が開放される。この電磁弁4が開放されると、ガスは実線矢印で示す方向に流れ、ストレーナ3、電磁弁4、逆止弁5、バッファタンク6を順に経て、圧縮機7に至り、ここから吐出された燃料ガスは、逆止弁8、高圧圧力スイッチ9、リザーバタンク10、ガス出口13を順に経て、マイクロガスタービン16に供給される。
【0017】
バイパス戻し回路21が、逆止弁5とレシプロ型圧縮機7との間に接続されるため、容量制御弁11が開放されると、圧縮機7から吐出された燃料ガスの一部が吸込側に戻されて、吐出量が制御される。
【0018】
本実施形態では、バイパス戻し回路21を通じて戻される燃料ガスが、逆止弁5とレシプロ型圧縮機7との間に戻されるため、この脈動が、逆止弁5の上流に影響を与えることが少なく、圧縮機7の吸込管内における燃料ガスの吸込流れに乱れを発生させる恐れが解消され、圧縮機から吐出された燃料ガスの一部を当該圧縮機の吸込側に円滑に戻すことができる。
【0019】
また、リリーフ回路22が逆止弁5と圧縮機7との間に接続されるため、リリーフ弁12が開放されると、レシプロ型圧縮機7から吐出された燃料ガスの一部が吸込側に戻されて、圧力異常上昇防止が図られる。このリリーフ弁12は、例えば、1MPaで全開となる。
【0020】
本実施形態では、リリーフ回路22を通じて戻される燃料ガスが、逆止弁5とレシプロ型圧縮機7との間に戻されるため、この脈動が、逆止弁5の上流に影響を与えることが少なく、圧縮機7の吸込管内における燃料ガスの吸込流れに乱れを発生させる恐れが解消され、圧縮機から吐出された燃料ガスの一部を当該圧縮機の吸込側に円滑に戻すことができる。
【0021】
上記構成では、図1中における各回路構成A、Bを、別の回路構成とすることが可能である。すなわち、図2は、バイパスガス容量制御弁11からバッファタンク6への戻り部(回路構成A)の各種変形例を示す。各種変形例において、ストレーナ3、電磁弁4、逆止弁5に関し、図2A〜図2Cに示すように、種々の組み合わせが可能になる。図2Aでは、ストレーナ3が省略され、このストレーナ3は、電磁弁4に内蔵されている。図2Bでは、電磁弁(吸入遮断弁)4が省略される。この場合、レシプロ型圧縮機7の停止と共に、このレシプロ型圧縮機7でガスが遮断される。図2Cでは、ストレーナ3と電磁弁(吸入遮断弁)4が省略され、逆止弁5にストレーナが内蔵される。この場合、図2Bと同様に、ガス遮断に関し、レシプロ型圧縮機7の停止と共に、このレシプロ型圧縮機7でガスが遮断される。図2A〜図2Cでは、上述した合流管23が、バッファタンク6の頂部に接続されている。この構成によると、圧縮機7の吸込側に戻される燃料ガスが、直接、バッファタンク6に戻されるため、燃料ガスの吐出脈動が、圧縮機7の吸込管内に殆ど影響を与えることがなく、燃料ガスの吸込流れに乱れを発生させる恐れが解消される。
【0022】
図3は、回路構成Bの変形例である。図1の例では、リリーフ弁12を経たガスを圧縮機7の吸込側に戻したが、この変形例に示すように、リリーフ弁12を経たガスを大気開放させてもよい。
【0023】
以上、一実施形態に基づいて本発明を説明したが、本発明は、これに限定されるものではない。例えば、吐出圧力の脈動を防止するリザーバタンク10は、これを省略することが可能である。
【0024】
【発明の効果】
本発明では、圧縮機の吸込管内における燃料ガスの吸込流れに乱れを発生させることなく、圧縮機から吐出された燃料ガスの一部を当該圧縮機の吸込側に円滑に戻すことができる。
【図面の簡単な説明】
【図1】本発明による燃料ガス供給装置の一実施形態を示す回路図である。
【図2】A〜Cは、バイパスガス容量制御弁からバッファタンクへの戻り部の各種変形例を示す回路図である。
【図3】リリーフ弁を経たガスの戻り部の変形例を示す回路図である。
【符号の説明】
1 ガス入口
3 ストレーナ
4 電磁弁(吸入遮断弁)
5 逆止弁
6 バッファタンク
7 圧縮機
8 逆止弁
10 リザーバタンク
11 バイパスガス容量制御弁
12 リリーフ弁
13 ガス出口
16 マイクロガスタービン
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel gas supply device that boosts a fuel gas of about 2 kPa to about 600 kPa and supplies the pressure to a load, for example.
[0002]
[Prior art]
In general, fuel gas such as city gas, LPG, biogas, etc. is compressed by a reciprocating compressor under inverter control, and the pressure of this fuel gas is increased to a pressure of about 600 kPa and supplied to a load such as a micro gas turbine. A fuel gas supply device is known (for example, Patent Document 1).
[0003]
In this type, since the pressure increase range of the fuel gas pressure is large, a relief circuit that returns a part of the fuel gas discharged from the reciprocating compressor to the suction side to prevent an abnormal increase in pressure, or a discharge from the compressor. A bypass return circuit for returning a part of the fuel gas returned to the suction side for discharge amount control is required.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-11099
[Problems to be solved by the invention]
However, when a part of the fuel gas discharged from the reciprocating compressor is returned to the suction side as in the past, the discharge pulsation of the fuel gas has an influence, and the suction flow of the fuel gas in the compressor suction pipe is disturbed. There are problems such as
[0006]
Accordingly, an object of the present invention is to solve the above-described problems of the prior art and to prevent a part of the fuel gas discharged from the compressor without causing a disturbance in the suction flow of the fuel gas in the suction pipe of the compressor. It is in providing the fuel gas supply apparatus which can return smoothly to the suction side of the said compressor.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a fuel gas supply device that compresses fuel gas by a compressor, raises the pressure of the fuel gas to a predetermined pressure, and supplies the compressed gas to a load, and is provided on the suction side of the compressor. A check valve and a bypass return circuit for returning a part of the fuel gas discharged from the compressor to the suction side for discharge amount control, and the bypass return circuit is connected to the check valve and the compressor. It is characterized by being connected between.
[0008]
According to a second aspect of the present invention, in the fuel gas supply device that compresses the fuel gas by the compressor, raises the pressure of the fuel gas to a predetermined pressure, and supplies it to the load, the fuel gas supply device is provided on the suction side of the compressor. A check valve and a relief circuit that returns a part of the fuel gas discharged from the compressor to the suction side to prevent an abnormal increase in pressure, and the relief circuit is provided between the check valve and the compressor. It is characterized by being connected to.
[0009]
According to a third aspect of the present invention, in the first or second aspect of the present invention, a buffer tank is provided between the check valve and the compressor.
[0010]
According to a fourth aspect of the present invention, in any one of the first to third aspects, a reservoir tank is provided on the discharge side of the compressor.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0012]
In FIG. 1, reference numeral 100 denotes a fuel gas supply device for a micro gas turbine. The fuel gas supply apparatus 100 has a gas inlet 1, and a low pressure switch 2, a dust removal strainer 3, an electromagnetic valve (suction cutoff valve) 4, and a check valve 5 are provided downstream of the gas inlet 1. Connected in order. Connected to the check valve 5 are a buffer tank 6 and a reciprocating compressor 7 that equilibrate the pressure of the fuel gas, and a high pressure switch 9 through the check valve 8 to prevent pulsation of the discharge pressure. The reservoir tank 10 is connected in order. 13 is a gas outlet.
[0013]
A return pipe 20 is connected between the reciprocating compressor 7 and the check valve 8. The return pipe 20 is branched into two, and a bypass gas capacity control valve 11 is connected to one branch pipe (bypass return circuit) 21, and a relief valve 12 is connected to the other branch pipe (relief circuit) 22. It is connected. Each of these circuits 21 and 22 joins a joining pipe 23, and this joining pipe 23 is connected between the check valve 5 and the buffer tank 6. Reference numeral 14 denotes a compressor cooling fan. The compressor 7 is driven and controlled by an inverter control circuit 15.
[0014]
The gas that has passed through the fuel gas supply device 100 is sent to the micro gas turbine (load) 16 through the gas outlet 13 to drive the micro gas turbine 16. The fuel gas supply device 100 is a device for boosting a fuel gas such as city gas of about 2 kPa supplied through the gas inlet 1, LPG, biogas, etc., and then supplying it to the micro gas turbine 16 through the gas outlet 13. Yes, the gas outlet 13 is compressed to about 600 kPa.
[0015]
Next, the operation of this embodiment will be described.
[0016]
When the compressor 7 is driven and controlled, the solenoid valve 4 is opened in conjunction with this. When the electromagnetic valve 4 is opened, the gas flows in the direction indicated by the solid line arrow, passes through the strainer 3, the electromagnetic valve 4, the check valve 5, and the buffer tank 6 in order, reaches the compressor 7, and is discharged therefrom. The fuel gas is supplied to the micro gas turbine 16 through the check valve 8, the high pressure switch 9, the reservoir tank 10, and the gas outlet 13 in this order.
[0017]
Since the bypass return circuit 21 is connected between the check valve 5 and the reciprocating compressor 7, when the capacity control valve 11 is opened, a part of the fuel gas discharged from the compressor 7 is on the suction side. Then, the discharge amount is controlled.
[0018]
In the present embodiment, since the fuel gas returned through the bypass return circuit 21 is returned between the check valve 5 and the reciprocating compressor 7, this pulsation may affect the upstream of the check valve 5. Therefore, the possibility of turbulence in the suction flow of the fuel gas in the suction pipe of the compressor 7 is eliminated, and a part of the fuel gas discharged from the compressor can be smoothly returned to the suction side of the compressor.
[0019]
Further, since the relief circuit 22 is connected between the check valve 5 and the compressor 7, when the relief valve 12 is opened, a part of the fuel gas discharged from the reciprocating compressor 7 is moved to the suction side. It is returned to prevent abnormal pressure rise. For example, the relief valve 12 is fully opened at 1 MPa.
[0020]
In this embodiment, since the fuel gas returned through the relief circuit 22 is returned between the check valve 5 and the reciprocating compressor 7, this pulsation hardly affects the upstream of the check valve 5. Thus, the possibility of turbulence in the suction flow of the fuel gas in the suction pipe of the compressor 7 is eliminated, and a part of the fuel gas discharged from the compressor can be smoothly returned to the suction side of the compressor.
[0021]
In the above configuration, the circuit configurations A and B in FIG. 1 can be different circuit configurations. That is, FIG. 2 shows various modifications of the return portion (circuit configuration A) from the bypass gas capacity control valve 11 to the buffer tank 6. In various modified examples, various combinations are possible with respect to the strainer 3, the solenoid valve 4, and the check valve 5, as shown in FIGS. 2A to 2C. In FIG. 2A, the strainer 3 is omitted, and the strainer 3 is built in the electromagnetic valve 4. In FIG. 2B, the electromagnetic valve (suction cutoff valve) 4 is omitted. In this case, the gas is shut off by the reciprocating compressor 7 as the reciprocating compressor 7 is stopped. In FIG. 2C, the strainer 3 and the electromagnetic valve (suction cutoff valve) 4 are omitted, and the checker 5 has a built-in strainer. In this case, as with FIG. 2B, regarding the gas shutoff, the gas is shut off by the reciprocating compressor 7 as the reciprocating compressor 7 is stopped. 2A to 2C, the junction pipe 23 described above is connected to the top of the buffer tank 6. According to this configuration, since the fuel gas returned to the suction side of the compressor 7 is directly returned to the buffer tank 6, the discharge pulsation of the fuel gas hardly affects the suction pipe of the compressor 7, The risk of disturbing the fuel gas suction flow is eliminated.
[0022]
FIG. 3 shows a modification of the circuit configuration B. In the example of FIG. 1, the gas that has passed through the relief valve 12 is returned to the suction side of the compressor 7, but the gas that has passed through the relief valve 12 may be opened to the atmosphere as shown in this modification.
[0023]
As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this. For example, the reservoir tank 10 that prevents the pulsation of the discharge pressure can be omitted.
[0024]
【The invention's effect】
In the present invention, a part of the fuel gas discharged from the compressor can be smoothly returned to the suction side of the compressor without causing a disturbance in the suction flow of the fuel gas in the suction pipe of the compressor.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing an embodiment of a fuel gas supply device according to the present invention.
FIGS. 2A to 2C are circuit diagrams showing various modifications of a return portion from a bypass gas capacity control valve to a buffer tank. FIGS.
FIG. 3 is a circuit diagram showing a modification of the return part of the gas that has passed through the relief valve.
[Explanation of symbols]
1 Gas inlet 3 Strainer 4 Solenoid valve (suction shutoff valve)
5 Check valve 6 Buffer tank 7 Compressor 8 Check valve 10 Reservoir tank 11 Bypass gas capacity control valve 12 Relief valve 13 Gas outlet 16 Micro gas turbine

Claims (4)

圧縮機により燃料ガスを圧縮してこの燃料ガスの圧力を所定の圧力に昇圧させて負荷に供給する燃料ガス供給装置において、
前記圧縮機の吸込側に設けられた逆止弁と、この圧縮機から吐出された燃料ガスの一部を吐出量制御のために吸込側に戻すバイパス戻し回路とを備え、
このバイパス戻し回路を前記逆止弁と前記圧縮機との間に接続したことを特徴とする燃料ガス供給装置。
In a fuel gas supply device that compresses fuel gas by a compressor and raises the pressure of the fuel gas to a predetermined pressure and supplies the pressure to a load.
A check valve provided on the suction side of the compressor, and a bypass return circuit for returning a part of the fuel gas discharged from the compressor to the suction side for discharge amount control,
The fuel gas supply apparatus, wherein the bypass return circuit is connected between the check valve and the compressor.
圧縮機により燃料ガスを圧縮してこの燃料ガスの圧力を所定の圧力に昇圧させて負荷に供給する燃料ガス供給装置において、
前記圧縮機の吸込側に設けられた逆止弁と、この圧縮機から吐出された燃料ガスの一部を圧力異常上昇防止のために吸込側に戻すリリーフ回路とを備え、
このリリーフ回路を前記逆止弁と前記圧縮機との間に接続したことを特徴とする燃料ガス供給装置。
In a fuel gas supply device that compresses fuel gas by a compressor and raises the pressure of the fuel gas to a predetermined pressure and supplies the pressure to a load.
A check valve provided on the suction side of the compressor, and a relief circuit for returning a part of the fuel gas discharged from the compressor to the suction side to prevent abnormal pressure rise,
A fuel gas supply device, wherein the relief circuit is connected between the check valve and the compressor.
前記逆止弁と前記圧縮機との間にバッファタンクを備えたことを特徴とする請求項1又は2記載の燃料ガス供給装置。The fuel gas supply apparatus according to claim 1, wherein a buffer tank is provided between the check valve and the compressor. 前記圧縮機の吐出側にリザーバタンクを備えたことを特徴とする請求項1乃至3のいずれか一項記載の燃料ガス供給装置。The fuel gas supply device according to any one of claims 1 to 3, further comprising a reservoir tank on a discharge side of the compressor.
JP2003208467A 2003-08-22 2003-08-22 Fuel gas supply device Pending JP2005069012A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023129662A1 (en) * 2021-12-30 2023-07-06 Tpe Midstream Llc Jumper lines with pumps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023129662A1 (en) * 2021-12-30 2023-07-06 Tpe Midstream Llc Jumper lines with pumps

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