Agitating – Stationary deflector in flow-through mixing chamber
Patent
1997-09-30
1999-05-18
Soohoo, Tony G.
Agitating
Stationary deflector in flow-through mixing chamber
366340, 138 42, B01F5/00
Patent
active
059044241
DESCRIPTION:
BRIEF SUMMARY
The-invention relates to a device for mixing liquids, in which the mixing takes place while the liquids to be mixed are flowing through narrow channels.
Devices for mixing liquids are known in the prior art in the form of static or dynamic mixers. Static mixers generally consist of pipe systems with internal fixtures. By utilizing the kinetic energy of a flowing liquid, it is homogenized after a specific flow path. Dynamic mixers have rotating mixing tools. These cause the mixing energy to enter the mixing product and bring about homogenization. Owing to the size of the equipment, mixers of this type can only be used for large quantities of liquid. However, the end or intermediate products occurring are often not required in this quantity.
By an extreme reduction in the reaction environment, attempts have been made to provide arrangements which enable mixing with little use of material. Such mixers operate as static mixers for the homogeneous mixing of small quantities of liquid according to the principle of the diffusion of liquid particles. In Proceedings .mu.-TAS; Enschede 1994; pages 142-151; ISBN 0-7923-3217-2, a device is described, in which the liquids flow through narrow channels and become mixed by diffusion after correspondingly long flow paths. In these arrangements, the high pressure loss and low degree of efficiency have proved to be a disadvantage.
A further design of static mixers is described in Proceedings .mu.-TAS; Enschede 1994; page 79. This arrangement has a large number of nozzles through which the liquids to be mixed are forced into one another. In these designs, too, the high pressure loss and the low degree of efficiency are a disadvantage.
Furthermore, mixers are known, which have a complicated shape of the channels, and in which, by means of internal fixtures, rotation and thus mixing of the liquid is to be brought about, a division of the liquid disadvantageously taking place after each mixing element and, after the following element, the division again leading to mechanical separation of the liquid (Proceedings .mu.-TAS; Enschede 1994; pages 237-243). The known mixers for small quantities of liquid are either of very complicated construction or they have a very low degree of efficiency.
The invention is based on the object of specifying a device which can homogenize even very small quantities of liquids with high efficiency and is simple to manufacture.
According to the invention, the object is achieved in that inlet channel and at least one outlet channel, channels lying in one branching plane, effected in one plane which is arranged rotated through 90.degree. relative to the branching plane and planar surface of the substrate being hermetically tightly sealed by a covering.
Advantageous refinements of the arrangement according to the invention are specified in the subclaims.
The device according to the invention is suitable for mixing very small quantities of liquid with a high efficiency and is distinguished by a very small construction size. Each element has at least two inlet channels for the liquids to be mixed. These channels can be arranged in a vertical or a horizontal plane. In the flow direction, these channels meet at a point, the confluence element. This is designed in such a way that, with a horizontal position of n inlet channels, n-outlet channels issue from this confluence in n different vertical planes respectively. If the n inlet channels lie in a vertical plane, n outlet channels issue from said confluence in a horizontal plane. The outlet channels, in turn, then form the inlet channels for the following mixing element. The overall arrangement consists of a large number, but of at least two, interconnections of these elements. Mixing of the liquids is achieved in that, for example, two liquids flowing in horizontal flow channels meet one another at the confluence in such a way that a vertical boundary layer develops between the two liquids. Two outlet channels then issue from this confluence in two planes disposed perpendicular to one another. This brings ab
REFERENCES:
patent: 3701619 (1972-10-01), Appeldoorn et al.
patent: 3881701 (1975-05-01), Schoenman et al.
patent: 4572435 (1986-02-01), Thompson
patent: 4908112 (1990-03-01), Pace
patent: 5252294 (1993-10-01), Kroy et al.
patent: 5304487 (1994-04-01), Wilding et al.
patent: 5376252 (1994-12-01), Ekstrom et al.
patent: 5427946 (1995-06-01), Kricka et al.
patent: 5443890 (1995-08-01), Ohman
Frank Thomas
Schwesinger Norbert
Merck Patent Gesellschaft mit beschrankter Haftung
Soohoo Tony G.
LandOfFree
Device for mixing small quantities of liquids does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for mixing small quantities of liquids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for mixing small quantities of liquids will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1754949