JP3253503B2 - Air injection type sewage pumping line - Google Patents
Air injection type sewage pumping lineInfo
- Publication number
- JP3253503B2 JP3253503B2 JP28905195A JP28905195A JP3253503B2 JP 3253503 B2 JP3253503 B2 JP 3253503B2 JP 28905195 A JP28905195 A JP 28905195A JP 28905195 A JP28905195 A JP 28905195A JP 3253503 B2 JP3253503 B2 JP 3253503B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- pipeline
- liquid
- gas
- sewage pumping
- 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.)
- Expired - Fee Related
Links
Landscapes
- Sewage (AREA)
- Pipeline Systems (AREA)
- Degasification And Air Bubble Elimination (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気注入式の汚水圧
送管路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air injection type sewage pumping line.
【０００２】[0002]
【従来の技術】圧送管路を用いて汚水を圧送する場合に
は、圧送管路内が嫌気状態になることによる硫化水素の
発生が問題となる。この硫化水素の発生を防止するため
の対策として、汚水圧送管路内へ空気を注入して、管路
内が嫌気状態とならないようにすることが行われてい
る。2. Description of the Related Art When sewage is pumped by using a pumping line, generation of hydrogen sulfide due to an anaerobic state in the pumping line becomes a problem. As a countermeasure for preventing the generation of hydrogen sulfide, air is injected into a sewage pumping pipeline to prevent the pipeline from becoming anaerobic.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このように管
路内に空気を注入すると、たしかに硫化水素の発生は抑
制されるが、管路内の流れが気液二相流となるため、汚
水のみが満管状態で流れる場合と比較して、一般に圧力
損失が増大するという問題点がある。However, when air is injected into the pipe as described above, generation of hydrogen sulfide is certainly suppressed, but since the flow in the pipe becomes a gas-liquid two-phase flow, sewage In general, there is a problem that the pressure loss increases as compared with the case where only the full tube flows.
【０００４】特に下り勾配区間においては気相と液相と
が完全に分離した自然流下の状態となり、その区間の損
失圧力水頭は流下した高低差に等しくなると考えられ
る。このため、管路全体での圧力損失の中で、この下り
勾配区間の圧力損失が占める割合が大きくなるという問
題点がある。[0004] In particular, in the downward slope section, the gas phase and the liquid phase are in a state of natural flow completely separated from each other, and the pressure loss head in that section is considered to be equal to the height difference flowing down. For this reason, there is a problem that the ratio of the pressure loss in the downward slope section to the pressure loss in the entire pipeline increases.
【０００５】そこで本発明はこのような問題点を解決
し、空気の注入によって気液二相流となる汚水圧送管路
において、下り勾配部で大きな圧力損失が生じないよう
にすることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to prevent a large pressure loss from being generated in a down-slope section in a sewage pumping line which becomes a gas-liquid two-phase flow by injecting air. I do.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明は、空気が注入されることで気液二相流が圧送さ
れる汚水圧送管路において、この管路の下り勾配部の手
前で管路内の空気と汚水とを分離する手段と、この分離
手段によって分離された空気を前記下り勾配部をバイパ
スさせるバイパス管路と、このバイパス管路からの空気
を管路の下り勾配部の終端部よりも下流側に強制的に再
注入させる手段とを設けたものである。SUMMARY OF THE INVENTION In order to achieve this object, the present invention relates to a sewage pumping line in which a gas-liquid two-phase flow is pumped by injecting air, before a downwardly inclined portion of the line. Means for separating the air and sewage in the pipeline by a bypass, a bypass pipe for bypassing the air separated by the separation means to the downgraded section, and a downgraded section of the pipeline from the air from the bypass pipe. Means for forcibly re-injecting the gas to the downstream side of the terminal end of the above.
【０００７】このような構成であると、管路の下り勾配
部の手前で管路内の気液二相流から空気がバイパス管路
に分離され、この下り勾配部では汚水のみが流されるた
め、その圧力損失は満管時と同等になり、大きな圧力損
失は生じない。またバイパス管路からの空気を管路の下
り勾配部の終端部よりも下流側に再注入させるため、そ
れよりも下流側では下り勾配部の手前側と同様に気液二
相流が圧送されることになる。With this configuration, air is separated from the gas-liquid two-phase flow in the pipeline to the bypass pipeline just before the downward gradient in the pipeline, and only sewage flows in the downward gradient. The pressure loss is equal to that when the vessel is full, and no large pressure loss occurs. In addition, in order to re-inject the air from the bypass pipe downstream of the end of the downgraded section of the pipe, a gas-liquid two-phase flow is pumped downstream from the bypass pipe in the same manner as before the downgraded section. Will be.
【０００８】[0008]
【発明の実施の形態】図１において、１は汚水圧送管路
であり、実質的に水平な方向に設置されている。この管
路１は、大きく傾斜した下り勾配部２を有している。下
り勾配部２よりも上流側における管路１の内部では、空
気が注入された汚水が気液二相流３となって加圧状態で
圧送されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a sewage pumping line, which is installed in a substantially horizontal direction. The pipeline 1 has a downwardly inclined portion 2 that is greatly inclined. Inside the pipe line 1 on the upstream side of the downgraded portion 2, the sewage into which air has been injected is sent as a gas-liquid two-phase flow 3 and is pressure-fed under pressure.
【０００９】管路１における下り勾配部２の直前には、
管路１内の空気を抜くための空気弁４が設置されてい
る。この空気弁４には、管路１から抜かれた空気を通す
ためのバイパス管路５の一端部が接続され、このバイパ
ス管路５は、管路１の下り勾配部２に沿って配置されて
いる。そして、バイパス管路５の他端部は、下り勾配部
２の終端部の位置に設けられたコンプレッサ６の吸入側
に接続されている。このコンプレッサ６の吐出側は、管
路１における下り勾配部２の終端部よりも下流側に連通
されている。Immediately before the downward slope 2 in the pipeline 1,
An air valve 4 for bleeding air from the pipeline 1 is provided. The air valve 4 is connected to one end of a bypass pipe 5 for passing the air extracted from the pipe 1, and the bypass pipe 5 is arranged along the downward slope 2 of the pipe 1. I have. The other end of the bypass pipe 5 is connected to the suction side of the compressor 6 provided at the end of the downhill section 2. The discharge side of the compressor 6 is connected to the downstream side of the end of the downward slope 2 in the pipeline 1.
【００１０】このような構成によれば、下り勾配部２よ
りも上流側における管路１の内部を流れてきた気液二相
流３に含まれる空気８は、空気弁４により分離されて、
管路１からバイパス管路５へ排出される。したがって下
り勾配部２には、このようにして空気が分離された汚水
のみが液相満管流９として流れ、このため、この下り勾
配部における圧力損失が、気液二相流を流す場合に比べ
格段に軽減されることになる。このため、下り勾配部２
に気液二相流を流す場合に比べ、圧送用のポンプの所要
動力を低減することができる。According to such a configuration, the air 8 contained in the gas-liquid two-phase flow 3 flowing in the pipeline 1 on the upstream side of the downward slope 2 is separated by the air valve 4,
It is discharged from the pipe 1 to the bypass pipe 5. Therefore, only the sewage from which the air has been separated in this way flows as the liquid full tube flow 9 into the downward slope 2, and the pressure loss in this downward slope causes the gas-liquid two-phase flow to flow. It will be significantly reduced. For this reason, the descending slope section 2
The required power of the pump for pressure feeding can be reduced as compared with the case where a gas-liquid two-phase flow is caused to flow through the pump.
【００１１】空気弁８によって管路１から排出された空
気は、並行してバイパス管路５内を流れ、コンプレッサ
６によって、管路１における下り勾配部２の終端部より
も下流側に再注入される。したがって、この部分よりも
下流側では、再び気液二相流３が圧送されることになっ
て、硫化水素の発生が防止される。このようにコンプレ
ッサ６によって空気を強制的に再注入しているため、空
気弁４の設置位置よりも下流側かつ鉛直方向の下側に位
置することで、この空気弁４の設置位置よりも管路内圧
力が上昇している部分に、容易に空気を再注入すること
ができる。The air discharged from the pipe 1 by the air valve 8 flows in the bypass pipe 5 in parallel, and is re-injected by the compressor 6 downstream of the end of the downgraded portion 2 in the pipe 1. Is done. Therefore, on the downstream side of this part, the gas-liquid two-phase flow 3 is pumped again, and the generation of hydrogen sulfide is prevented. As described above, since the air is forcibly re-injected by the compressor 6, the air valve 4 is located downstream and vertically below the installation position of the air valve 4, so that the pipe is located farther than the installation position of the air valve 4. Air can be easily re-injected into the portion where the passage pressure is increasing.
【００１２】[0012]
【発明の効果】以上述べたように本発明によると、汚水
圧送管路の下り勾配部の手前で管路内の空気と水とを分
離する手段と、この分離手段によって分離された空気を
前記下り勾配部をバイパスさせるバイパス管路と、この
バイパス管路からの空気を管路の下り勾配部の終端部よ
りも下流側に再注入させる手段とを設けたため、管路の
下り勾配部では液相のみを液相満管流として圧送するこ
とができ、このため、この下り勾配部における圧力損失
を気液二相流を流す場合に比べて軽減させることがで
き、また管路の下り勾配部の終端部よりも下流側にバイ
パス管路からの空気を強制的に再注入させるため、それ
よりも下流側では再び気液二相流を圧送させることがで
きて、硫化水素の発生を防止できる。As described above, according to the present invention, means for separating air and water in the pipeline before the downward slope of the sewage pumping pipeline, and separating the air separated by the separating means into Since a bypass pipe for bypassing the downgraded section and means for re-injecting the air from the bypass pipe downstream of the terminal end of the downgraded section of the pipe are provided, the liquid in the downgraded section of the pipeline is provided. Only the phase can be pressure-fed as a liquid full tube flow, so that the pressure loss in this downgraded portion can be reduced as compared with the case of flowing a gas-liquid two-phase flow, and the downgraded portion of the pipeline can be reduced. Forcibly re-inject the air from the bypass line downstream of the end of the gas, so that the gas-liquid two-phase flow can be pumped again downstream of the end, preventing the generation of hydrogen sulfide .
【図１】本発明にもとづく空気注入式の汚水圧送管路の
実施の一形態を示す概略図である。FIG. 1 is a schematic view showing an embodiment of an air injection type sewage pumping line according to the present invention.
１ 汚水圧送管路 ２ 下り勾配部 ３ 気液二相流 ４ 空気弁 ５ バイパス管路 ６ コンプレッサ DESCRIPTION OF SYMBOLS 1 Sewage pumping line 2 Downhill part 3 Gas-liquid two-phase flow 4 Air valve 5 Bypass line 6 Compressor
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−258424（ＪＰ，Ａ) 特開 平５−202554（ＪＰ，Ａ) 特開 平４−131439（ＪＰ，Ａ) 特開 昭63−297593（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F17D 1/20 B01D 19/00 C02F 1/00 E03F 3/02 E03F 7/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-258424 (JP, A) JP-A-5-202554 (JP, A) JP-A-4-131439 (JP, A) JP-A-63-1988 297593 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F17D 1/20 B01D 19/00 C02F 1/00 E03F 3/02 E03F 7/00
Claims (1)
される汚水圧送管路において、この管路の下り勾配部の
手前で管路内の空気と汚水とを分離する手段と、この分
離手段によって分離された空気を前記下り勾配部をバイ
パスさせるバイパス管路と、このバイパス管路からの空
気を管路の下り勾配部の終端部よりも下流側に強制的に
再注入させる手段とを設けたことを特徴とする空気注入
式の汚水圧送管路。A means for separating air and sewage in the pipeline in front of a downward slope of the pipeline in a sewage pumping pipeline in which a gas-liquid two-phase flow is pumped by injection of air; a bypass line the air separated by the separating means to bypass the descending slope portion, forcing the downstream side of the end portion of the down slope portion of the air duct from the bypass conduit <br / > An air-injection type sewage pumping line characterized by having means for re-injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28905195A JP3253503B2 (en) | 1995-11-08 | 1995-11-08 | Air injection type sewage pumping line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28905195A JP3253503B2 (en) | 1995-11-08 | 1995-11-08 | Air injection type sewage pumping line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09133299A JPH09133299A (en) | 1997-05-20 |
| JP3253503B2 true JP3253503B2 (en) | 2002-02-04 |
Family
ID=17738194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28905195A Expired - Fee Related JP3253503B2 (en) | 1995-11-08 | 1995-11-08 | Air injection type sewage pumping line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3253503B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182920A (en) * | 2011-03-07 | 2011-09-14 | 云南大红山管道有限公司 | Large-fall drop-out type pipeline energy dissipation and transportation device |
-
1995
- 1995-11-08 JP JP28905195A patent/JP3253503B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182920A (en) * | 2011-03-07 | 2011-09-14 | 云南大红山管道有限公司 | Large-fall drop-out type pipeline energy dissipation and transportation device |
| CN102182920B (en) * | 2011-03-07 | 2012-11-07 | 云南大红山管道有限公司 | Large-fall drop-out type pipeline energy dissipation and transportation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09133299A (en) | 1997-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |