DE3240923A1 - Process and device for preparing a homogeneous gas mixture - Google Patents

Description

Patent attorneys Dipl ^ IngVH% WiickMANN, BTipl.-Phys. Dr. K. Fincke

DiPL.-iNG * F. A'WeVckma'nn.'Dipl.-Chem. B. Huber Dr.-Ing. H. LisKA ο

PL / ML 323 82 05

8OOOMÜNCHUN 86 PO Box 860 820 MU! 11STRASSE 22 TF.UFON ((m) 98 OJ 52 TElKX 5 22621

TIlFGRAM PATiNTWI- ICKMANN MUNICH

5th November 1982

UNION DES GAZ MODERNES Societe Anonyme Francaise 152, avenue des Champs-Elysees 75008 PARIS (France)

Method and device for producing a homogeneous gas mixture

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.PL / ML 323 82 05

DESCRIPTION

The invention relates to a method and a device for producing a homogeneous gas mixture in predetermined Amount ratios based on a carrier gas and a liquid enrichment additive, which gas mixture can be used in particular as fuel for industry or household or as fuel.

To produce the desired enriched gas mixture, attempts have already been made to use the liquid enrichment additive or to spray the liquid enrichment additive into a carrier gas stream, the proportions of the Components of the mixture by controlling the additional amount sprayed in and / or by controlling the throughput the gas flow can be regulated. In all cases, this well-known procedure has proven to be useful in practice turned out to be of little interest: On the one hand, the injection device for the liquid additive is in the form of a spray expensive, both in terms of initial cost and operational cost; on the other hand, the entire facility (container for the carrier gas, container for the liquid additive and Injection device) a relatively large space requirement and must be arranged at the same place of application, what for certain areas of application in which the available space is limited, poses difficulties.

To overcome these disadvantages, it has also been proposed that the desired gas mixture be achieved, for example produce that one introduces the carrier gas into the liquid additive and the gas phase for the desired

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Application deducts. Although this known method has the advantage of simplicity, it has the great disadvantage that, despite the fact that the liquid additive is introduced into the mixture in precisely predetermined proportions, it is impossible to ensure that the additive in the same proportions in is contained in a stable manner in the withdrawn gas mixture. Depending on the Raoult ¹ see and Dalton's laws which have been generalized with respect to the evaporation of fully miscible mixtures, the concentration of the gas phase above the mixture varies depending on the pressure and the temperature.

In certain applications, the mixture to be used is a combustible mixture, the is present in a container, the filling of which depends to a considerable extent on the consumption of the fuel varies. Due to this fact, the composition of the vapor phase is also subject to above the liquid one Phase of significant changes.

If on the other hand, for example, the fuel A fuel for an internal combustion engine of a motor vehicle, the temperature can also be considerable Way depending on the atmospheric conditions in which the vehicle is operated.

Due to this fact, it was impossible, if the mixture was withdrawn directly from the gas phase, to ensure a stability of the pressure and the temperature, so that it was not possible, the constancy to maintain the mixing ratios in this gas phase.

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The object of the present invention is thus to overcome the above-mentioned disadvantages of the conventional methods to overcome and to create a method and a device that are better than the previously known methods and devices correspond to the various requirements of practice, in particular in that one in can obtain an enriched gas mixture that is homogeneous and stable in a simple and inexpensive manner.

ο This task is now solved by the characteristic Features of the method according to the main claim. The subclaims relate to particularly preferred embodiments of this subject matter of the invention and a device to carry out the procedure.

The invention is therefore a method for producing a homogeneous gas mixture, in particular can be used as fuel for industry or household or as fuel, starting from a carrier gas and a liquid enrichment additive or enrichment additive characterized by that one after the other

- the carrier gas liquefies,

- the liquefied carrier gas in the required or desired proportions with the liquid Enrichment additive mixed to form a homogeneous liquid mixture,

- Introduces the homogeneous liquid mixture into an evaporator and

- A gaseous mixture wins in a simple and inexpensive way at the outlet of the evaporator, which the Contains carrier gas and the enrichment additive in gaseous form.

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Investigations have shown that the gas mixture obtained according to the invention is completely homogeneous and great stability with regard to the required or desired proportions of the Has components.

It can of course be advantageous to mix the mixture of the carrier gas and the liquid enrichment additive, to improve the homogeneity of the mixture if necessary.

Another advantage of the method according to the invention can be seen in the fact that it does not pose any technical problems and with simple and inexpensive devices can be put into practice.

Another advantage of the method according to the invention relies on the simplicity of separating the stages of preparing the liquid mixture and the stages of the Evaporation of the liquid mixture to form the desired enriched gas mixture. These latter Measures can easily be carried out at the point of consumption of the enriched gas mixture itself when the space requirements are small, since a significant proportion of the devices are allocated to that area can, in which the production of the liquid mixture takes place.

Depending on the intended application of the gaseous mixture, the carrier gas can either be a combustible gas or a propellant gas. Furthermore can the liquid additive or the liquid additive which serves to achieve at least one of the properties of the carrier gas to improve and / or increase, for example, but not exclusively, a caloric or heat-supplying one Be an addition if the carrier used

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gas is a fuel, or an additive that has the properties and performances of that used as a fuel Carrier gas improves (for example, the octane number of a fuel for an internal combustion engine, the Sept number of a fuel for a diesel engine, the density, the viscosity etc.).

Another object of the invention is a device for producing a homogeneous gas mixture, in particular can be used as fuel for industry or household, or as fuel, starting from one Carrier gas and a liquid enrichment additive that is characterized by a combination of

- a source for the gaseous carrier gas,

- a device for liquefying the carrier gas, which is supplied from the source,

- a source for the liquid enrichment additive,

- A mixing device for mixing the liquefied Carrier gas with the liquid enrichment additive in the required or desired proportions, and

- An evaporation device which is connected to the mixing device for supplying the liquid mixture and a removal device for the gaseous mixture which contains the carrier gas and the enrichment additive contains in gaseous form in the required or desired proportions in stable and homogeneous form.

According to a preferred embodiment, the invention comprises Device additionally on the one hand a single pumping and measuring device, the output of which with the mixing device is connected, and on the other hand distribution devices, which are above or upstream of the pumping device are arranged and the supply of either the liquefied carrier gas or the liquid

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- Allow 9 enrichment additives to be added to the pump.

Preferably, the apparatus further comprises primary storage facilities for storing the manufactured items liquid mixture and secondary storage facilities which are located on the consumer side and which are provided with the evaporation device are connected. ·

According to the invention, only the secondary storage facilities (e.g. a simple bottle or an automobile tank) and vaporization facilities available. In this way, the application is made much easier, especially if the enriched gas mixture is used in the household such as for heating rooms, or as fuel for the supply of an internal combustion engine.

Furthermore, since the liquid mixture is produced in facilities separate from the application facilities may be, these manufacturing facilities for the liquid mixture can be in another more convenient location be arranged, for example, in the vicinity of a manufacturing facility for the carrier gas, and can in particular with all desired advantageous devices be provided without having to take into account the space required to in this way the To increase the production yield of the liquid mixture. In this way, the cost of making these can be reduced Mixture can be lowered in a considerable way compared to the conventional method.

The invention is explained in more detail below with reference to the accompanying drawing. In the drawing demonstrate

Fig. 1 is a schematic representation of an inventive Device and FIG. 2 shows a schematic representation of a further one

Embodiment of that shown in FIG Contraption.

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Referring initially to FIG. 1, the device according to the invention comprises a feed line 1 for the carrier gas, which is a fuel or a propellant that is to be enriched.

The liquefaction device 2 connected to the supply line 1 enables the liquefaction of the carrier gas in the desired, known manner, either by compressing at constant temperature (especially at Room temperature) or by cooling at constant pressure (especially at atmospheric pressure).

The liquefied carrier gas is in the liquid state in a buffer tank 3 transferred.

Another container 4 contains the liquid additive which is used to enrich the carrier gas. Although the Invention is not intended to be limited to this special case, it should be noted, however, that it is most advantageous is when the additive is liquid under normal conditions of temperature (room temperature) and pressure (atmospheric pressure).

The containers 3 and 4 are connected to outlets 5 and 6 through which the liquid phases are withdrawn. For this the lines 5 and 6 are inserted into the lower portion (as shown in FIG. 1) of the container 3 and 4.

Two groups of pumping and measuring devices (for example volume measuring devices) 7 and 8 represent the promotion of the relevant liquids in defined proportions in the mixing container 9 safe. Although the introduction of the two liquids in the container 9 alone can be sufficient to form a homogeneous mixture, it can for certain more difficult to mix liquid products from

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It may be advantageous to provide additional equipment, such as mechanical mixing equipment (e.g. a circulation pump) in order to improve the homogeneity of the liquid mixture present in the container 9 even further (These additional devices are not shown in FIG. 1). The liquid obtained in this way Mixture contains the liquefied carrier gas and the liquid additive in the required or desired Proportions and is homogeneous and stable.

An outlet line 10 is arranged in the lower region of the container 9 in such a way that only the liquid phase the mixture can be withdrawn, depending on the pressure or with the aid of a pump (not shown).

Via line 10, the liquid mixture becomes the Inlet of an evaporation device 11 led to the its output delivers a gas mixture that the vaporized carrier gas and the vaporized enrichment additive in the contains required or desired proportions. This gas mixture is completely homogeneous and stable. The evaporation device can be any device known to those skilled in the art which is suitable for the intended purpose suitable is.

The resulting at the outlet of the evaporation device 11 gaseous mixture can then via an interposed expansion and control valve 13 (via line 12) are fed to the consumer device.

· Fig. 2 illustrates in more detail a modified one Embodiment of the device shown in FIG. 1, which is designed particularly advantageously «

The carrier gas is supplied from a container 21 at which is either a buffer tank of a facility that continuously supplies the gas, or a

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Storage and transport container of the gas between the production site and the manufacturing device according to the invention acts.

The carrier gas, possibly sucked in with the aid of a pump 22, is introduced into the liquefaction device 23, which is operated under the same conditions as described above. At the outlet of the liquefaction device, the liquefied carrier gas is stored in a buffer container 24.

The liquid enrichment additive is placed in a container 25 under the same conditions as specified above, stored. Here it is provided that only a single pumping and measuring device (for example a volume measuring device) 26 to keep the set-up costs as low as possible. To this end are two Lines 27 and 28 introduced into the containers 24 and 25 and provided with taps 29 and 30, respectively, before they are in the · The inlet of the pumping and measuring device 26 open. The two taps 29 and 30 are connected to each other (via the dashed line 31) connected so that it is possible depending on the operation the pumping and measuring device 26 the required quantities, for example volumes) of the two liquid components refer to. For example, the common control circuit of the cocks 29 bund 30 can be designed so that only one of these taps is open at the same time, while the other is closed, so that you can go through the appropriate opening these taps can regulate the proportions of the components of the mixture by adjusting the throughput and / or the operating time of the pump 26 controls.

The products, which are sucked in one after the other via the pump 26, are introduced into a single storage container 32, in which one can, if necessary, provide suitable mixing devices to, if necessary, the Homogeneity of the liquid mixture, i.e. the mixture

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from the liquefied carrier gas and the liquid enrichment additive to improve.

The part of the device according to the invention just described (the part shown to the left of the vertical dash-dotted line 33 in FIG. 2) can be in the form of a Fixed unit are formed, which together with all additional devices that improve the Effectiveness and the yield are necessary, can be placed in another place without being thereby an impairment of space occurs. In other words, it can be an industrial facility that produced the desired mixture in liquid form and stored in storage containers 32 (primary storage containers) is retained until it is ultimately distributed in shares.

This distribution (which is shown in Figure 2 with the dashed arrow 34) still provides the mixture in liquid form to individual storage containers (secondary storage containers) 35 to be used by the consumer are provided. The distribution can take place in any way, either depending on the type of material to be distributed Product or the type of individual storage container (distribution station for liquid propellant ' substance for filling the tanks of motor vehicles with Internal combustion engines are equipped which are operated with the enriched gas mixture; Bottles or Containers that are filled at the main reservoir 32 and the consumer for a technical application - cutting from sheet metal with the cutting torch - or for use in the household - for heating rooms will? or a transport with the help of a tank truck to fill individual containers).

From the individual storage containers 35 is the liquid mixture fed to an evaporator 36, which the

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Enriched gas mixture is supplied to the desired consumer 38 via an expansion and control valve 3 7.

This part of the device according to the invention (the one on the right the dash-dotted line 33 of FIG. 2) can be designed in a sufficiently compact form to Can also be used where there is little space available (for example in vehicles that have operated with a gaseous fuel).

Thus, the device according to the invention enables in addition to their flexibility of use, the use of simple and common facilities and is therefore inexpensive, nevertheless enables the formation of a homogeneous and stable gaseous mixture, which has considerable advantages versus the mixtures made by conventional procedures (same or better properties, greater economy and safer use).

It goes without saying that the invention is not restricted to the preferred embodiments described is, but also includes all modifications.

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Claims (7)

• UNION DES GAZ MODERNES '.. *.: .. PL / ML 323 82 05 claims 1. Process for the production of a homogeneous gas mixture, which can be used in particular as fuel for industry or household or as fuel, starting from a carrier gas and a liquid enrichment additive, characterized in that one after another - the carrier gas liquefies, - the liquefied carrier gas in the required proportions mixed with the liquid enrichment additive to form a homogeneous liquid mixture, - Introduces the homogeneous liquid mixture into an evaporator and - In a simple and inexpensive way at the output of the Evaporator a gaseous mixture wins, which the . Carrier gas and the enrichment additive in gaseous form and with great stability of the required proportions contains in a perfectly homogeneous form. 2. The method according to claim 1, characterized in that the mixture of the liquefied carrier gas and the liquid Enrichment additive mixed. 3. The method according to claim 1 or 2, characterized in that a fuel is used as the carrier gas and a liquid additive is used caloric additive used. 4. The method according to claim 1 or 2, characterized in that a fuel is used as the carrier gas and a liquid additive uses an agent that improves the properties and performances of the carrier gas. UNION DES GAZ MODERNES PL / ML 323 82 05 5. Device for producing a homogeneous gas mixture, which can be used in particular as fuel for industry or household or as fuel, starting from a carrier gas and a liquid enrichment additive, characterized by a combination of - a source (1) for the gaseous carrier gas, - A device (2) for liquefying the source (1) originating carrier gas, - a source (4) for the liquid enrichment additive, - A mixing device (9) for mixing the liquefied Carrier gas and the liquid enrichment additive in the required proportions, - And an evaporation device (11), which is associated with the mixing device (9) is connected to the supply of the liquid mixture and a removal device (12, 13) for the gaseous mixture containing the carrier gas and the enrichment additive in gaseous form in the required proportions contains in stable and homogeneous form. 6. Apparatus according to claim 5, characterized in that it also has a single pumping and measuring device on the one hand (26), the output of which is connected to the mixing device (32), and on the other hand distribution devices (29, 30) which are arranged above the pumping device and the Feeding either the liquefied carrier gas or the enable liquid enrichment additive to the inlet of the pump. 7. Device according to claims 5 or 6, characterized in that it additional primary storage facilities (32) for storing the liquid mixture produced and secondary ones Has storage devices (35), which are arranged on the consumer side and with the evaporation device are connected.