DE2544597A1 - Impulse-hydraulics applied to mixing and stirring - of liq., gaseous and solid systems - Google Patents

Abstract

Process for mixing or stirring of solid-liq., liq.-liq. gaseous or solid-gaseous systems using hydraulically driven mechanisms. The stirring mechanism or vessel is set in additional vibration or oscillation motion using hydraulic impulses of widely variable strength frequency and amplitude. The motion is produced through the hydraulic medium using a controller emitting a pulsing pressurising flow, leading to an ideal degree of homogeneity. In addn. to 'normal' systems, process can be applied to the mixing of high viscous and paste-like substances, addn. of alloying and other solids to molten metals and salts, flotation sepn. of ores, etc. High efficiency of mixing is achieved in a shorter time.

Description

Dr. Ing.Kurt Gruber, 400-Monchengladbach, Heidewegende

Dipl.-Ing. Heinrich Proell, 400-Monchengladbach, Bekeistr. 50 Dipl.-Ing. Helmut Sieke, Hannover 72, Kirchbischlerstr. 5 Mixing process and performance and stirring of solid, liquid and gaseous substances with impulse hydraulics Die The present invention relates to a new method and a new device for Mixing and stirring of solid, liquid and gaseous substances with hydraulic actuated, pulsating, variable frequency and amplitude tools of a device or a container with bilfe of the impulse hydraulics.

In process engineering, a distinction is made between mixing and stirring of mixtures of substances.

The process is referred to as "mixing" when the proportion of solid or gaseous substances to the liquid substance in the case of a substance mixture to be mixed predominates.

Conversely, one speaks of "stirring" when the liquid mixing component has a greater share in the mixing process.

According to the process, there are static and dynamic mixers Mixer.

Thanks to special constructions in containers, you can reach them without moving There is a certain turbulence in the device, for example, caused by animals, and receives a static mixer. However, if the turbulence is actively generated, a dynamic one is created Mixer.

The construction of this type of mixer usually consists of one Container with a removable device for mixing stolks.

This type of activities are unceremoniously called a stirrer, respectively. Agitators which are referred to according to internal flow patterns, mode of action or their external Calssitized shape.

The advancing technique has many variations in the development of Mixers and agitators, especially in the chemical and pharmaceutical industries shailed. They are adapted to the properties of the substances to be mixed.

With the agitators, which can be used as propeller, turbo, paddle, trough, Planetary, friction, screw, roller, strolling, countercurrent, jet, drum, honus, laumel, gyro, cooler, vacuum, flow-through, eluid stirrer, etc. just to name a few One tries to name one that is known in practice, not just the solid To distribute quassi-homogeneously in the Benalter, but outside the mixing time with the degree of homogeneity put in meaningful relationship.

After the pneumatics and oil hydraulics in the process engineering Misenen and stirring found its way into, pneumatic mixers are used today.

1) he oil hydraulics was mainly applied to the drive of agitators.

here were the advantages of hydroatatic drives, such as stepless good regularity within wide limits, acceleration with rolling torque, as well as overload protection, to name just a few, the decisive factor for the application.

In the course of rationalization, the designs of mixers are subject to change and agitators constant improvements with the aim of an optimally homogeneous product to be reached in the shortest possible time.

The present invention is also based on this idea.

The new process is based on the use of impulse hydraulics, which makes it possible to convert the substance mixture into additional during the work process To offset pulsations, which are variable in frequency and amplitude within wide limits are, in order to achieve a perfect product, the most favorable mixing time and performance characteristics to achieve.

Another advantage for a perfectly nomogenic product is if the oscillating movement of impulses introduced at intervals will. This makes it possible to design the vibrations in such a way that they are optimal Result in mixing values.

In particular, this is the case when pulses begin at the beginning of the pulse a strong increase in force and then up to the end of the impulse a steady or self have uniformly changing force.

The essence of the device according to the invention consists in the arrangement the container or the tool of a mixer, respectively. The agitator hydraulically to put a control unit inevitably into pulsations during the mixing process, which can be ideally adapted to the mixing process in terms of frequency and amplitude.

In ig. l a hydrostatic agitator drive is shown schematically. The controllable pump A, driven by an electric motor, pumps your oil in closed price for the oil motor B. The oil that is too warm and used is over in this circle the flush valve C removed from the circuit. The fresh oil comes over the Feed block D into the system on the low pressure side and compensates for this escaping flushing fluid. The feed pressure pump E is also used to deliver this oil E-motor drive and accessories, such as cooler, filter, pressure relief valve, pressure monitor, Pressure gauges, oil tanks, etc.

Serves to improve the misunderstanding and performance characteristics the impulse hydraulics, its additional structure for a hydrostatic agitator drive schematically emerges from FIG.

In essence, however, a device is pulsating pressure oil, in Frequency and amplitude variably fed to a hydraulic cylinder and these pulsations üi with the help of one or two further working cylinders on the tool of the agitator or transferred to the container.

The construction of a pressurized oil supply for a pubic tool an agitator system from FIGS. 2 and 3. In Fig. 4 is the application ues pulsating container before, which is acted upon by a double-sided or possibly is also only caused to vibrate by a cylinder acted upon on one side.

The pressure oil required for pulsation is supplied by a pump 2, which is driven by an electric motor 1, via a volume controller 4 for amplitude control to the pulse generator (control unit) 6, the latter is conveyed hydraulically or electrically with fixed or adjustable speed for frequency control 6 driven and has four line connections. Lines B and A lead the pressurized oil to the pulsating one Hydroxylinder 7, which is alternately applied.

In the stener device, the connection P-A is short-circuited and the backflow Oil from cylinder 7 flows back from B-T via filter 8 into tank 9. The pressure relief valve 3 determines the system pressure and is used to regulate the force.

The Vorriehlung for generating pressure pulses (control unit) can be a drenender or swinging spool, with soft at least against one side of the Kelbenz in the working cylinder in a changing rim once one Pressure line, the other is connected to the return line.

The rotating or swinging control slide has very different possibilities to change the pulse shape and the pulse frequency.

A possibility for the specific design of pulse shapes and also to change it is that the slots and openings for the pressure medium passage are equipped with curved edges in the control spool. »Uren Differing from the hesenteck shape and openings, different pulse shapes can be created produce.

The frequency can easily be adjusted with a swinging control slide thereby varying; that a cam wheel is provided as the drive, the drive motor of which is provided is adjustable to accidental speeds.

With a drenenden control slide, the frequency can be adjusted more easily change by using a drive motor that can be adjusted to different speeds as the drive is provided.

The control valve piston of a rotary valve can be dren, and be designed to be displaceable. With a drenenden control spool that is The drive speed of the control piston is decisive for the pressure frequencies generated. An additional shift in the rotating Sieuerscheberkelben causes a change of the flow rates un «at N = const. a change in pressures.

In the case of an oscillating spool valve, the oscillation frequency is used of the piston to generate a certain frequency of the hydraulic impulses. Additionally the oscillating spool valve can still be twisted during its rub. This also gives variable flow rates.

The formation of the Drenschieber driven by a drive motor in a simple design without longitudinal displacement and its mode of action gent from Fig. 5 here.

The illustration shows schematically the development of the circumference of the Rotary valve in connection with the working piston in both end positions and nor the splitting of the stream. with hydraulic actuation of the rotary liver the oil enters through an inlet opening in the housing and a connection to a circumferential ring groove of the rotary valve. Right and left of this ring groove one or two axially arranged oil pockets are offset by 180 ° on the circumference drilled in.

In addition, there are one or two corresponding ones belonging to the oil pockets Oil bores arranged offset on the circumference, which run inward and the pressure medium lead with an axially directed bore to the oil outlet ring groove.

Rotary valve housings are also provided with radial bores that with one turn of the rotary valve with the oil pockets and holes in the valve come to cover.

As a result, when the pressure medium enters the annular groove, the section a-b short-circuited the oil hole A of the working cylinder.

The oil displaced on B flows at the same time through hole B. Oil outlet ring groove.

After half a turn of the throttle valve, the oil hole will open C short-circuited to the pressure medium supply. A and B remain closed. The pressure medium now acts on the piston side C. The The working piston moves into the other end position division and drags the oil over hole D.

By choosing this valve, the pressure medium flow becomes intermittent divided into two streams of oil. The frequency changes with the speed. The change in flow rate varies the pressure.

In connection with the already mentioned, various guarded of Rünrwerke two states are worth mentioning in the Verlanrenstechnik Mixing and Tubing, which are particularly suitable for the application of impulse hydraulics.

This is the mixing of "solids in liquids".

The recent technology is known to convert solids into liquids quickly to dissolve or to be able to be very effective in a solid-catalyzed reaction, that the entire surface of the solids with the liquids contact, respectively. the solid particles must come into suspension. The turn of the impulse hydraulics would achieve this effect simply by vibrating the tool or an agitator of the container disrupts the solid particles in the liquid and has a relatively favorable whirling characteristic.

A very process of the process engineering described here is the "mixed land." in the pasty state ".

In Wieses Geldet Tallen e.g. single-shaft or multi-shaft agitators just choose media. Special concrete and word preparation machines. The place the hydraulics would work on this sector, since the drum autrieds onhelung viellach Delhydraulic are, through additionally hydraulically generated, to an improved one Product lead.

Advantages through superimposed pulsations that calibrate the working percentage You can also use the plastic extruder technology to achieve this.

The process technology mixing and hearing trills in its application also in the manufacture of konelsen too. It is well known that the liquid Steel test ingredients are added.

In the production of rear-end cast iron, as Mehaniete- or Hydraullägus, are sometimes used to improve quality.

Impulse hydraulics would be applied to these Genletes their variation of the controllable frequency and amplitude within wide limits of great Be useful.

There are two rings pointing out that the proposed application The Erilhdung specializes in the mentioned sector also on mixing processes at high Temperatures.

Liquid metal or salt baths in which solids are desirable can be introduced, the mixture of substances according to the technology of the invention in particular be advantageously nomogenized and improved in their quality.

An area related to the process of mixing and stirring is "flotation" individual minerals ". When processing minerals such as copper pebbles, Nickel, cobalt, lead or zinc ores become auxiliary equipment for mixing and conditioning used, which are similar to the devices mentioned. Are also in this sector Oil hydraulic drives known, the additional facilities for impulse hydraulics can get to work more rationally.

A new type of device that is used in process engineering for mixing and Stirring is not yet known, goes from Fig. 6 nerver.

After the chemical industry succeeded in removing membrane bodies Rautschuk with vulcanized metal lattice fabrics, which not only Achieve high strength, but also high durability values, it is possible Mixing liquids or gases in the liquid-liquid or liquid-gaseous state to be achieved by mixers equipped with membranes.

As can be seen, in a cylindrical container, which is closed at the ends with lids, membrane body, which is of one expand with the mixture of substances inside the container and on the lid side a pressure medium from a control unit 6 and a working cylinder 7 alternately be applied.

The substances to be mixed M1 and M2 enter the container at the top, flow through it over baffles to the exit at M. During the mixing process the substances M1 and M2 will be liereienen with frequencies and amplitudes in wide variable pulsations and thus an ideal degree of homogeneity of the straw mixture achieved.

If a mixer is not sufficient during pulsation mixing, Best option to have multiple mixers come in either. (see. Fig. 7) too switch to get a homogeneous mixture of substances. (see Fig. 7) with this circuit additional additives M and M can be added to the one or more at a later point in time other membrane mixer can be introduced into the working process for the main mixing process and exit at M0.

In summary, the invention has advantages over the previous process engineering based on mixing and stirring: -pulse mixing or impulse stirring a mixture of substances through pulsations of a variable in frequency and amplitude hydraulically or pneumatically operated control unit, which during the work process either on the tool or on the container of a mixer BEZW. Agitator and thus to an optimal mixing time-assisting characterisitk Stir.

- Impulse mixing without an agitator, only by means of a container Membrane bodies that give off forced vibrations on the mixture of substances and thereby a good, homogeneous product is achieved.

- Using a rotary valve with division of the pressure medium flow sun vibrations are transmitted to the tool or container of an agitator, which are due to variable frequencies and amplitudes within wide limits to the mixing process adapt in an ideal way,

Claims (1)

Protection claims 1. Verlauren for mixing or stirring mixtures of substances in solid-liquid, liquid-liquid or test-gaseous, resp. liquid-gaseous Exchange by means of a hydraulic device, characterized in that iuau the tool or the container of a mixer BEZW. agitator using hydraulic impulses, variable within wide limits in terms of force, frequency and amplitude, by a pulsating pressure medium flow generated by a control unit are caused in additional vibrating, respectively. oscillating movement offset, csie lead to an ideal degree of hemogeneity, 2. The method according to claim 1 daduren characterized that the frequency of the oscillating movement is constantly between an upper and a lower limit value changed. 3. The method according to claim 1, characterized in that the oscillating movement in the form of a time interval a led impulses generated. 4. The method according to claim 1, characterized in that the pulses a strong increase in force at the beginning of the impulse and then a steady increase until the end of the impulse or show even Endernue strength. 5. The method according to claim 1, characterized in uass one in constant Change the tool once with a pulse in the axial direction, once with a pulse applied in three directions. 6. The method according to claim 1, characterized in that the mixing of liquids with solids, e.g. in metal or salt baths even with high Temperatures can take place. Method according to claim 1, characterized in that milk of Liquids or gases in the liquid-liquid or liquid-gaseous state without Agitators only through the in to homogenize the stack mixture flowing through a container. 8. Device for mixing and holding of Stoligemiscnen by means of a pneumatic or hydraulic device for generating a vibratory movement according to claim 1 - 7 characterized in that the device for generating the Vibration movement from a control unit for a hydraulic or pneumatic one Pressure medium with intermittently emerging pressure impulses and an impinged upon it The working piston consists of a cylinder, measuring reciprocal positions in frequency and amplitude variable on the rotating tool or the container of the mixer Dec. ltunrwerkes are transferred and to an optimal mixing time performance characteristics lead 9. Vorricntung according to Anspruen 8 a characterized in that the control unit is a rotating or swinging control slide, with which at least the one side of the piston in the cylinder in alternating sequence once a pressure line, the other time the return line is connected. 0. Device according to Anairucn 9 dadurcn marked that control unit and working cylinders are arranged one behind the other in tandem design and the drive shaft, respectively Rotary valve shaft are also part of the working cylinder. 11. The device according to claim 9, characterized in that the slots and openings for the pressure medium flow in the control slide of the control unit with in Curved shutters are equipped. 12. The device according to claim 9, characterized in that the drive for the rotating control spool piston, preferably at various speeds continuously adjustable drive motor is provided. 14 '. Device according to claim 9, characterized in that the Control slide piston of the control unit is both rotatable and displaceable. 14. The device according to claim 9, characterized in that the device to generate the vibratory movement directly on the tool or on the container of the Agitator is arranged. 15. Vorricntuiig according to claim 8 gekennzeichnnet that the Device without a rotary mechanism only through in a container on one side with a pressure medium Membrankörljer applied a forced pulsation to the mixture of substances flowing through of the mixer. 16. The device according to claim from characterized in that the Vorrintung without an agitator just by in a container with a pulsating Pressurized hose or several hoses that are in their Functioning like membrane bodies behave, a forced pulsation on the flowing through Dispense the mixture of substances from the mixer. 174 Device according to claims 15 and 16, characterized in that instead of a mixer, several mixers parallel or one behind the other for the flowing Mixture of substances are provided. 18. The device according to claim 8-14, characterized in that as pressure medium to drive the control device to the pulsations also to another The pressure medium used is the same as the mixture of substances, e.g. cooking oil is used.