Gas separation – Multiple separators – each with discrete and longitudinally... – Centrifugal
Patent
1991-12-06
1992-11-17
Hart, Charles
Gas separation
Multiple separators, each with discrete and longitudinally...
Centrifugal
55348, 554591, 2105122, B01D 4512
Patent
active
051639866
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a vortex chamber separator with at least one vortex chamber and in each case two immersion pipes, which are placed coaxially in the vortex chamber, and in each case extend toward one another from their end walls and are connected to a clean gas outlet.
A vortex chamber separator of this type is described, e.g., in DE-Al 32 03 498. It, like other known vortex chamber separators, has the drawback that because of the flow losses in the vortex chamber separator its separation efficiency relative to the energy use is relatively small and the multichamber arrangements often necessary to increase the separation efficiency have a relatively large construction volume. As a result, the range of use of these known vortex chamber separators is limited.
The object of the invention is to improve the vortex chamber separator of the initially mentioned type so that with a reduction of the flow losses the separation efficiency of the vortex chamber is improved and with single chamber and multichamber arrangements with increased separation efficiency a reduction of the construction volume is achieved.
According to the invention the object is achieved by the characterizing features of claim 1. Advantageous configurations of the invention are described in the dependent claims. These vortex chamber separators, equipped with an immersion pipe spiral housing, bends and diffusers for clean gas suction make possible small total pressure losses so that the vortex chambers comprise very small loss factors. According to the invention, certain ratios are observed with respect to the geometric dimensions. Vortex chamber diameter d, immersion pipe diameter dt and vortex chamber height h advantageously are linked to one another by an annular cross-sectional characteristic number K, which describes the heightwidth ratio of the cross section of the vortex annular space. The annular cross-sectional characteristic number K.sub.opt is defined by the relationship (d-dt)/(2h).sub.min. As small a value as possible is to be sought for the annular cross-sectional characteristic number K.sub.opt. As a result, the advantage of the smallest vortex volume at constant vortex chamber diameter d and minimum vortex pressure losses connected with it in the vortex space of the vortex chamber is achieved. K.sub.opt is selected as small as possible so that the secondary flow is just still maintained to keep up the helical flow zone on the immersion pipes with its high separation capacity and thus separation efficiency. The helical flow zone is placed in a circular manner around the immersion pipes and forms the fine separation zone of the vortex chamber. The helical flow lines produce on the particles particle separation forces with two components perpendicular to one another. Radially the centrifugal force of the vortex flow in its full extent acts as a particle displacement force. Axially the flow sweeping force of the secondary flow acts on the particles. The aim is that the centrifugal forces on the particles become as great as possible and the flow sweeping forces become as small as possible. This results in small increases of the helical flow lines with high displacement forces (centrifugal forces) at great retention times of the particles in the fine separation zone. As a result great separation efficiencies are achieved. It is advantageous to design the vortex chamber so that the quotient of immersion pipe diameter dt and vortex chamber diameter d is close to 1. Basically it is true for dt/d.ltoreq.1. At this selected ratio, the total pressure losses are reduced or at constant allowed pressure losses higher flow rates in the vortex chamber are possible. As a result, the separation efficiencies are increased and the gas throughput of the vortex chamber is increased. Further, the construction size and thus the construction volume of a vortex chamber at constant gas throughput is reduced. The quotient of vortex chamber diameter d and vortex chamber height h is to be considered as another magnitude. The quotient d/h as much as pos
REFERENCES:
patent: 4244708 (1981-01-01), Bielefeldt
patent: 4276068 (1981-01-01), Loussermair et al.
patent: 4375365 (1983-03-01), Muller et al.
patent: 4801310 (1989-01-01), Bielefeldt
LandOfFree
Vortex chamber separator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vortex chamber separator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vortex chamber separator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1168885