EP0486726B1 - Pompe à anneau liquide - Google Patents

Pompe à anneau liquide Download PDF

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Publication number
EP0486726B1
EP0486726B1 EP19900122405 EP90122405A EP0486726B1 EP 0486726 B1 EP0486726 B1 EP 0486726B1 EP 19900122405 EP19900122405 EP 19900122405 EP 90122405 A EP90122405 A EP 90122405A EP 0486726 B1 EP0486726 B1 EP 0486726B1
Authority
EP
European Patent Office
Prior art keywords
separator
ring pump
liquid ring
condensate
liquid
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 - Lifetime
Application number
EP19900122405
Other languages
German (de)
English (en)
Other versions
EP0486726A1 (fr
Inventor
Günter Dipl.-Ing. Holzheimer (FH)
Kurt-Willy Dipl.-Ing. Mugele
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP19900122405 priority Critical patent/EP0486726B1/fr
Priority to DE59006448T priority patent/DE59006448D1/de
Publication of EP0486726A1 publication Critical patent/EP0486726A1/fr
Application granted granted Critical
Publication of EP0486726B1 publication Critical patent/EP0486726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid

Definitions

  • the invention relates to a liquid ring pump according to the preamble of claim 1 and claim 4.
  • liquid ring pump In the liquid ring pump, a liquid ring of operating liquid circulates through an impeller in a housing.
  • the liquid ring stands out on the suction side of the impeller hub so that the gas to be pumped can enter. On the pressure side, the liquid ring approaches the impeller hub again, whereby the now compressed delivery gas is pushed out.
  • the liquid ring pump works with a downstream separator for the recovery of operating fluid.
  • the return line of the separator is optionally passed through a heat exchanger to cool down the operating fluid.
  • Liquid ring pumps are particularly suitable for the oil-free compression of dry gases that are partially or completely saturated with water vapor.
  • the pumping speed and the suction pressure change with the temperature of the operating liquid, since the vapor pressure is temperature-dependent.
  • Usual operating characteristics are recorded for the suction of air with 100% relative humidity and a temperature of 20 ° C as well as for water as operating liquid at a temperature of 15 ° C.
  • the operating fluid also has another function, namely to dissipate the compression heat and, if necessary, to seal gaps between the impeller and control discs and, if necessary, also to cool internal parts of a shaft seal.
  • the extracted operating fluid can be separated from the conveying gas in a downstream separator.
  • the invention has for its object to develop a liquid ring pump that works more economically and less sensitive to changes in temperature and relative humidity of the conveying gas.
  • the operating liquid present in the exhaust air is recovered by a heat exchanger arranged in the exhaust air line of the separator.
  • the cooling capacity of the heat exchanger is regulated as a function of a level sensor on the condensate of the separator in such a way that the cooling capacity increases as the condensate level drops and the cooling capacity decreases as the condensate level increases.
  • the recovered operating fluid in the heat exchanger should be cooled down to a temperature in the order of 5 ° C for an operating fluid made of water.
  • liquid ring pump If you want to make compromises for special reasons, you can train the liquid ring pump according to claim 2 and arrange a drain valve and an inlet valve in the return line between the separator and the heat exchanger. So that can the liquid ring pump also work in a superimposed mode with operating liquid to be supplied and drained.
  • a liquid ring pump according to claim 3 offers, due to an air cooler connected to the return line of the separator, a further improved cooling capacity and thus a further improved pumping speed. All operating fluid in the circuit is cooled by the air cooler. The operating fluid is recovered from the exhaust air via the heat exchanger located in the exhaust air line.
  • a gas ring compressor or fan which presses air into the separator, can also be arranged in liquid ring pumps in which heat exchangers are arranged in the exhaust air line and, if appropriate, in the return line as well.
  • a liquid ring pump is then obtained according to claim 5.
  • the gas ring compressor or the fan can be arranged in such a way that the air is introduced either through the condensate or above the condensate into the separator.
  • Both the regulation of the supply of operating fluid and the regulation of the cooling capacity of the heat exchanger should preferably be carried out via a level sensor which e.g. can be formed according to claim 13 or 14.
  • a level sensor which e.g. can be formed according to claim 13 or 14.
  • Advantageous exemplary embodiments are specified in claims 11 and 12 for regulating the supply of operating fluid.
  • liquid ring pump In a liquid ring pump according to claim 15, the pumping speed and the achievable vacuum is further improved. A liquid ring pump designed in this way is thus even more economical.
  • 1 denotes a liquid ring pump, which is followed by a separator 3 via a connecting line 2.
  • the separator 3 has an exhaust air line 4 which opens into the atmosphere. Furthermore, the separator 3 is connected to the liquid ring pump 1 via a return line 5.
  • a heat exchanger 6 is arranged in the exhaust air line 4 and is connected to the return line 5 via a pipe 7.
  • the separator 3, together with the heat exchanger 6, serves to recover operating liquid which, after compression of the gas to be conveyed, is partially pressed out of the liquid ring pump 1.
  • the recovered operating fluid from the separator 3 is returned to the liquid ring pump 1 via the return line 5 and from the heat exchanger 6 via the pipeline 7.
  • the level of the condensate 9 formed by the operating liquid in the separator 3 is detected by a level sensor 10, which preferably comprises a Peltier element.
  • the level sensor 10 is functionally part of a controller 11.
  • the controller 11 therefore regulates the cooling capacity of the heat exchanger 6 as a function of the level of the condensate 9.
  • the regulation is carried out in such a way that the cooling capacity is increased when the condensate level drops and the cooling capacity is reduced when the condensate level increases .
  • the condensate level drops, the condensate gain increases and, when the condensate level is high, discharge through evaporation.
  • water is used as the operating fluid.
  • an amount of heat exchanger 6 is required Handling operating fluid in the order of 450 kg per hour.
  • a drain valve 12 and / or an inlet valve 13 can be provided in the return line 5 between separator 3 and air cooler 8.
  • a gas ring compressor 14 is arranged on the separator 3.
  • the gas ring compressor 14 blows air from the atmosphere into the separator 3.
  • the air is introduced through the condensate 9 into the separator 3. This results in a particularly high degree of saturation of the air introduced.
  • the heat of vaporization required to saturate the air with water is extracted from the water, which is thereby cooled.
  • the water loss that occurs here leads to a lowering of the condensate 9.
  • the lowering of the condensate 9 is detected by a level sensor 15, which is designed as a float switch and automatically connects a water-carrying supply line 16.
  • the supply line 16 can in turn be connected via an inlet valve 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (15)

  1. Pompe à anneau liquide (1) comportant un séparateur (3) monté en aval, destiné à la récupération du liquide de fonctionnement, qui présente un conduit (4) d'évacuation d'air ainsi qu'un conduit de retour (5) ramenant à la pompe à anneau liquide (1),
    caractérisée en ce que
    dans le conduit (4) d'évacuation d'air du séparateur (3) est monté un échangeur (6) de chaleur dont la puissance de refroidissement peut être réglée au moyen d'un capteur (10, 15) de niveau, en fonction du niveau du condensat (9) collecté dans le séparateur (3) de façon telle que lorsque le niveau de condensat s'abaisse la puissance de refroidissement est augmentée et que lorsque le niveau du condensat s'élève la puissance de refroidissement est diminuée.
  2. Pompe à anneau liquide (1) selon la revendication 1, caractérisée en ce qu'
    une valve de décharge (12) et/ou une valve d'entrée (13) sont disposées dans le conduit de retour (5).
  3. Pompe à anneau liquide (1) selon la revendication 1 ou 2, dans lequel est monté un autre échangeur (8) de chaleur dans le conduit (5) de retour, caractérisée en ce que cet échangeur de chaleur est du type échangeur à air (8).
  4. Pompe à anneau liquide (1) comportant un séparateur (3) monté en aval pour la récupération du liquide de fonctionnement, qui présente un conduit (5) de retour ramenant à la pompe à anneau liquide (1), caractérisée en ce qu'
    au moins un compresseur annulaire pour gaz (14) ou un ventilateur envoyant de l'air sous pression dans le séparateur (3) est disposé dans celui-ci.
  5. Pompe à anneau liquide (1) selon une ou plusieurs des revendications 1 à 3, caractérisée en ce qu'au moins un compresseur annulaire pour gaz (14) ou un ventilateur envoyant de l'air sous pression dans le séparateur (3) est disposé dans celui-ci.
  6. Pompe à anneau liquide (1) selon la revendication 4 ou 5, caractérisée en ce que l'air est introduit dans le séparateur (3) en lui faisant traverser le condensat (9).
  7. Pompe à anneau liquide (1) selon l'une des revendications 4 à 6, caractérisée en ce que l'air est introduit dans le séparateur (3) au-dessus du condensat.
  8. Pompe à anneau liquide (1) selon l'une des revendications 3 à 8, caractérisée en ce que dans le conduit (5) de retour une valve (12) de décharge et/ou une valve d'entrée (13), sont disposées entre le séparateur (3) et le dispositif (8) de refroidissement d'air.
  9. Pompe à anneau liquide (1) selon l'une des revendications 3 à 8, caractérisée en ce que dans le conduit (5) de retour, une valve (12) de décharge et/ou une valve d'entrée (13) raccordée à un conduit d'alimentation en liquide de fonctionnement sont disposées entre le séparateur (3) et le dispositif de refroidissement d'air.
  10. Pompe à anneau liquide (1) selon une ou plusieurs des revendications 1 à 9, caractérisée en ce qu'une valve d'entrée (17) raccordée à un conduit d'alimentation (16) en liquide de fonctionnement est disposée sur le séparateur (3).
  11. Pompe à anneau liquide (1) selon une ou plusieurs des revendications 8 à 10, caractérisée en ce que la valve d'entrée (13, 17) et/ou la valve de décharge (12) peuvent être réglées en fonction du niveau de condensat dans le séparateur (3).
  12. Pompe à anneau liquide (1) selon la revendication 11, caractérisée en ce que la régulation s'effectue au moyen d'un capteur de niveau (10, 13) de façon telle que dans le cas où le niveau de condensat s'abaisse en dessous d'une valeur de seuil inférieure susceptible d'être fixée à l'avance, la valve d'entrée (13, 17) est ouverte et que dans le cas où le niveau de condensat s'élève au-dessus d'une valeur de seuil supérieure susceptible d'être fixée à l'avance, la valve de décharge (12) est ouverte.
  13. Pompe à anneau liquide (1) selon la revendication 12, caractérisée en ce que le capteur de niveau est du type interrupteur (15) à flotteur.
  14. Pompe à anneau liquide (1) selon l'une des revendications 1 à 12, caractérisée en ce que le capteur de niveau comprend un élément Peltier (10).
  15. Pompe à anneau liquide (1) selon l'une des revendications 1 à 14, caractérisée en ce qu'au moins une pompe à anneau de gaz est montée en amont de celle-ci.
EP19900122405 1990-11-23 1990-11-23 Pompe à anneau liquide Expired - Lifetime EP0486726B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19900122405 EP0486726B1 (fr) 1990-11-23 1990-11-23 Pompe à anneau liquide
DE59006448T DE59006448D1 (de) 1990-11-23 1990-11-23 Flüssigkeitsringpumpe.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19900122405 EP0486726B1 (fr) 1990-11-23 1990-11-23 Pompe à anneau liquide

Publications (2)

Publication Number Publication Date
EP0486726A1 EP0486726A1 (fr) 1992-05-27
EP0486726B1 true EP0486726B1 (fr) 1994-07-13

Family

ID=8204745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900122405 Expired - Lifetime EP0486726B1 (fr) 1990-11-23 1990-11-23 Pompe à anneau liquide

Country Status (2)

Country Link
EP (1) EP0486726B1 (fr)
DE (1) DE59006448D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8034144B2 (en) 1999-02-26 2011-10-11 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
CN110418891A (zh) * 2017-02-24 2019-11-05 佶缔纳士机械有限公司 包括控制器的泵系统

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59402988D1 (de) * 1993-08-11 1997-07-10 Siemens Ag Mechanischer Verdichteranlage
FR2709428B1 (fr) * 1993-09-01 1995-09-29 Cit Alcatel Installation pour l'épuration en continu d'un solvant.
DE59500510D1 (de) * 1994-12-06 1997-09-18 Siemens Ag Verdichteraggregat
DE29714851U1 (de) * 1997-08-19 1997-10-23 Siemens AG, 80333 München Flüssigkeitsringpumpenaggregat
FI110537B (fi) * 2001-06-29 2003-02-14 Evac Int Oy Alipaineviemärijärjestelmä
US7762789B2 (en) * 2007-11-12 2010-07-27 Ingersoll-Rand Company Compressor with flow control sensor
CN105822577B (zh) * 2015-01-06 2018-01-09 中国石化工程建设有限公司 一种液环泵/压缩机系统和防止过载的方法
CN108223375A (zh) * 2017-11-23 2018-06-29 中材节能股份有限公司 一种一体化液环抽真空装置
CN112344215A (zh) * 2020-09-18 2021-02-09 南通新金丰皮革机械有限公司 一种皮革用真空系统液体供料装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785755A (en) * 1971-11-22 1974-01-15 Rogers Machinery Co Inc Air compressor system
FR2374539A1 (fr) * 1976-12-15 1978-07-13 Air Ind Procede de compression de vapeur d'eau, et circuits thermiques pour sa mise en oeuvre
FR2553500B1 (fr) * 1983-10-14 1986-01-03 Sihi Pompes Procede et dispositif de recuperation de vapeurs d'hydrocarbures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8034144B2 (en) 1999-02-26 2011-10-11 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
US8246708B2 (en) 1999-02-26 2012-08-21 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
CN110418891A (zh) * 2017-02-24 2019-11-05 佶缔纳士机械有限公司 包括控制器的泵系统

Also Published As

Publication number Publication date
DE59006448D1 (de) 1994-08-18
EP0486726A1 (fr) 1992-05-27

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