Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
  • F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
  • F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
  • F04F1/10—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/01—Physico-chemical properties
  • C10N2020/077—Ionic Liquids

Definitions

• the invention relates to a method for compressing a gaseous medium, in particular hydrogen.
• the invention relates to an apparatus for compressing a gaseous medium, in particular of hydrogen.
• Piston compressor systems for use. Piston compressors require appropriate sealing systems in order to keep the medium to be compressed separated from the drive (drive) medium which drives the piston, for example hydraulic oil.
• Generic methods and devices are used, for example, in natural gas compressor stations, as implemented in natural gas filling stations.
• Object of the present invention is to provide a generic method and a generic device for compressing a gaseous medium, in particular of hydrogen, indicate that or avoid the aforementioned disadvantages.
• this object is achieved in that the compression of the gaseous medium is carried out by a liquid, wherein a liquid in which the gaseous medium does not dissolve and / or which is separable from the gaseous medium without residue, is used.
• the inventive device for compressing a gaseous medium is characterized in that it a) one or more cylinders, b) supply and discharge lines, which serve to supply and discharge of the gaseous medium to be compressed in or out of the cylinder or cylinders, c ) per cylinder at least one liquid line, which serves to supply and discharge of the gaseous medium-compressing liquid in the cylinder, and d).
• the liquid is a liquid in which the gaseous medium to be compressed does not dissolve and / or which is separable from the gaseous medium without residue comprises.
• the invention makes it possible to dispense with the compression of a gaseous medium to a piston and any (piston) sealing systems. This is achieved by realizing a compression of the gaseous medium to be compressed via a column of liquid which can be changed within a cylinder.
• the previously used pistons which consist of a solid material, are replaced by a non-compressible liquid or liquid column. By moving up and down the liquid column - analogous to the upward and downward movement of a piston - the gaseous medium to be compressed is sucked in and compacted.
• a liquid is preferably selected in which the gaseous medium to be compressed does not dissolve and which can be separated from the gaseous medium without residue.
• an ionic liquid a high-boiling Hydrauliköi or liquids which have a very low vapor pressure, such as vacuum pump oils, molten salts and metals low melting point, or liquids having a Gaslösiichkeit of less than 10 "4 mol / l bar used.
• Ionic liquids are low-melting, organic salts with melting points between 100 and -90 0 C, wherein most of the known ionic liquids are already in liquid form at room temperature. In contrast to conventional molecular liquids, ionic liquids are entirely ionic and therefore show new and unusual properties. Ionic liquids can be adapted comparatively well by varying the structure of anion and / or cation and by varying their combinations in terms of their properties to given technical problems. For this reason, they are often referred to as so-called "Designer Solvents". With conventional molecular liquids, however, only a variation of the structure is possible.
• ionic liquids In contrast to conventional molecular liquids, ionic liquids also have the advantage that they have no measurable vapor pressure. This means that, as long as their decomposition temperature is not reached, they do not evaporate in the slightest traces, even in a high vacuum. This results in the properties of incombustibility and environmental friendliness, since ionic liquids can not escape into the atmosphere.
• the melting points of known ionic liquids are by definition below 100 ° C.
• the so-called liquidus range-this is the range between melting point and thermal decomposition-is generally 400 ° C. or more.
• ionic liquids have a high thermal stability. Often, their decomposition points are above 400 0 C. The density and the mixing behavior with other liquids can beei ⁇ flus ⁇ t or adjusted in ionic liquids by the choice of the ions. Ionic liquids also have the advantage that they are electrically conductive and thereby can prevent electrical charging - which represent a potential hazard. Ionic liquids have the advantage that their complete separation from the compressed medium with a comparatively low expenditure on equipment is mögiich.
• the figure shows a possible embodiment of the invention, in which the compression takes place in two separate cylinders Z1 and 22.
• the compression can also be realized only in one or in more than two cylinders.
• the cylinders Z1 and Z2 are supplied with the gaseous medium to be compressed via lines 1, 1 'and 1 ", and inlet valves a and b are arranged in the aforesaid conduits, after which the compressed gaseous medium from the cylinders Z1 and Z2 is transferred the discharge lines 2 'and 2 ", in which also valves c and d are arranged, deducted.
• the compressed gaseous medium is in a separation device A of the cylinders Z1 and Z2 possibly entrained liquid, which will be discussed in more detail below, freed and then fed via line 2 its further use and / or intermediate storage.
• a suitable liquid D which serves for the compression of the gaseous medium, is provided inside the cylinders Z1 and Z2.
• the cylinders Z1 and Z2 are connected via the lines 3 to 6 and the hy rauiikpumpe X, which is driven by an electric motor M connected.
• the fluid levels D in the cylinders Z1 and Z2 are varied in such a way that one of the cylinders sucks the medium to be compressed, while at the same time or substantially simultaneously in the other cylinder a compression of the gaseous medium takes place.
• an axial piston pump with swashplate control is preferably used, wherein through a simple adjustment of the swashplate flow rate and / or conveying direction can be changed.
• the invention also has the advantage over the prior art that an at least partial removal of the (compression) heat produced during the compression can take place via the liquid D.
• heat exchangers or coolers K1 and K2 are provided, via which the heat generated in the cylinders Z1 and Z2 during compression can be dissipated, for example, to the environment and / or another suitable medium.
• the device according to the invention can be arranged in the cylinders Z1 and Z2 heat exchangers E1 and E2.
• heat exchanger here are any constructions of heat exchangers - hereinafter referred to as “active heat exchanger” - and heat storage - hereinafter referred to as “passive heat exchanger” - to understand.
• the aforementioned advantageous embodiment of the device according to the invention thus enables a substantial reduction of the required compression energy and thus an approximately isothermal compression. Furthermore, lower gas outlet temperatures can be realized and a reduction of the thermal load of the compressor valves can be achieved.
• the liquid separated from the compressed medium in the separating device A and originating from the cylinders Z1 and Z2 is optionally provided via line 9, in which a stop valve e is arranged
• the liquid can be supplied according to the need in the cylinders Z1 and Z2 via the lines T and 8 and the two shut-off valves f and h the cylinders Z1 and / or Z2.
• the dosing of liquid required for the compression takes place during a suction cycle.
• Liquid feed in which the prescribed requirements can be kept &.
• the time for the make-up of liquid required for the compression should be based on the current power consumption of the system; Preferably, the dosing of liquid should be done during or near a performance minimum. At this time, the system or the drive pump has sufficient power reserves that can be used for the Nacfispeisen the liquid.
• the liquid to be replenished D is passed during a suction cycle via the line 10, which has a feed pump P, in the corresponding cylinder Z1 and Z2.
• the make-up does not take place immediately in the vicinity of the reversal point, since then there is the danger that liquid D u. U. from the corresponding cylinder Z1 or Z2 via the pressure line 2 'and 2 "exits.
• the separation device A- which serves to separate from the cylinders Z1 and Z2 entrained liquid, correspondingly larger
• a liquid feed during the suction cycle minimizes the energy requirement of the feed pump P.
• the detection of the fluid loss takes place via a measure of the deviations of the fluid levels in the cylinders Z1 and Z2 from a reference value, which is normally determined at the beginning of the compression process.
• the liquid is exposed to an electric field.
• the device side Mittet for generating an electric field in the cylinder or cylinders are provided
• a mixing and formation of a two-phase mixture may occur at the separation surface.
• such a two-phase mixture may, for example, arise within the cylinder (s) at the interface between ionic liquid and the medium to be compressed.
• ionic liquids which have a corresponding dipole moment and / or a corresponding electrical conductivity.
• the influence of ionic liquids by means of an electric field makes it possible to increase the acceleration in the reversal points of the pistonless compressor, without there being an increased risk of phase mixing. Furthermore, a clean and reliable separation of ionic liquids from a two-phase mixture is possible even if the
• Density differences between the ionic liquid and the medium to be compressed are comparatively low.
• embodiments of erfindungsgernä H method and apparatus of the invention can be realized in which only one cylinder or three or more cylinders are provided. While a cylinder is not capable of delivering the compressed medium continuously with respect to the compression pressure, such often desired delivery of the compressed medium is possible with two or more cylinders.
• the invention is suitable for compression of gaseous media to pressures of 1000 bar, which is currently feasible. It should be emphasized, however, that in principle also arbitrarily higher pressures can be achieved.
• the invention further enables compression to maximum pressure with only a single compression stage. Furthermore, the flow rate can be varied as desired.
• the invention provides a cost effective way to compress such media to very high pressures.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Reciprocating Pumps (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Compressor (AREA)
• Hydrogen, Water And Hydrids (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Manufacture Of Iron (AREA)
• Jet Pumps And Other Pumps (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)

Applications Claiming Priority (2)

Publications (2)

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• 2004
  • 2004-09-24 DE DE102004046316A patent/DE102004046316A1/de not_active Withdrawn
• 2005
  • 2005-08-02 WO PCT/EP2005/008370 patent/WO2006034748A1/fr active Application Filing
  • 2005-08-02 CA CA002581280A patent/CA2581280A1/fr not_active Abandoned
  • 2005-08-02 EP EP05768562A patent/EP1792087B1/fr not_active Not-in-force
  • 2005-08-02 US US11/575,956 patent/US20070258828A1/en not_active Abandoned
  • 2005-08-02 AT AT05768562T patent/ATE530772T1/de active
  • 2005-08-02 JP JP2007532789A patent/JP4986161B2/ja not_active Expired - Fee Related
  • 2005-08-02 AU AU2005289219A patent/AU2005289219A1/en not_active Abandoned
  • 2005-08-02 CN CN2005800319092A patent/CN101023272B/zh not_active Expired - Fee Related
  • 2005-08-02 KR KR1020077004889A patent/KR20070057813A/ko not_active Application Discontinuation
• 2007
  • 2007-03-22 ZA ZA200702362A patent/ZA200702362B/xx unknown

Non-Patent Citations (1)

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