Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
  • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
  • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/20—Removing cooking fumes
  • F24C15/2035—Arrangement or mounting of filters

Definitions

• the invention relates to a separator for liquids from a gas stream, in particular for oil mist, with two curved deflecting surfaces opposite one another, laterally offset with the concave sides, along which a gas stream to be cleaned flows in succession.
• Such an oil mist separator is known for example from DE-OS 35 21 927. It is used, for example, to clean air streams contaminated by oil mist or similar substances in kitchens or in factory halls. For this purpose, these air streams are guided along the deflection surfaces. Air droplets entrained on the deflection surfaces are thrown by the deflection and settle there, while the air stream freed from the oil droplets and other liquid particles then leaves the oil separator again. The direction change is repeated in known separators carried out one after the other, for this purpose in known oil separators, a larger number of opposing deflection surfaces adjoin one another in such a way that the air flow flows along a larger number of deflection surfaces while swirling.
• a first deflection surface first acted on by the gas stream extends over a circumference of less than 180 ° and the gas stream is lets out an acute angle to the direction of incidence.
• the deflection of the first deflection surface, which is thus less than 180 °, and the deflection of the second deflection surface, which deflects over an angle of more than 180 °, can be coordinated with one another in such a way that both deflection surfaces jointly deflect the gas flow by an angle , which overall is somewhat larger than 360 °. It is advantageous if the deflection direction is the same on the first and on the second deflection surface.
• a third adjoins the second deflecting surface, which extends circumferentially over more than 180 ° and deflects the gas stream emerging from the second chamber to such an extent that it leaves the third deflecting surface on a path crossing the incoming gas stream. In this way, a second crossing point is obtained which adjoins the first and at which the remaining liquid particles are thoroughly separated again. It is advantageous if the deflection direction on the third deflection surface is opposite to that of the second deflection surface.
• the arrangement is advantageously made such that the gas stream leaving the first deflecting surface and the gas stream leaving the third deflecting surface run essentially parallel.
• first and the third deflection surface are arranged next to one another and open together towards the second deflection surface.
• the third is followed by a fourth deflecting surface which directs the gas stream leaving the third deflecting surface in a direction parallel to the direction of entry of the gas flow into the first deflecting surface.
• the gas flow is thus deflected by the four deflecting surfaces first in one direction by slightly more than 360 ° and then in the opposite direction by the same angle, so that it leaves the oil separator offset parallel to the inflow direction and laterally opposite the inflow point.
• the second and fourth deflecting surfaces are arranged next to one another and open together towards the first and third deflecting surfaces, the second and fourth deflecting surfaces preferably deflecting the gas flow in the same direction.
• edges of the deflecting surfaces have thickened areas with a circular arc in cross section. It has been found that these thickenings lead to a particularly effective separation of the liquid which is entrained by the gas flow along the deflecting surfaces. The gas stream breaks off at the thickenings without taking the liquid particles with them, which can then flow off at the thickenings of the deflection surfaces.
• an inlet gap for the gas stream to be cleaned is arranged between two second deflecting surfaces which are formed in mirror image with respect to one another, and in the flow direction behind the gap there is a flow divider which is triangular in cross section, side surfaces which are spaced apart from one another are each part of a first deflecting surface, these first deflecting surfaces being formed in mirror image of one another.
• Two fourth deflecting surfaces embodied in mirror image to one another advantageously meet at an acute angle at the outlet of the gas stream, the tip being directed towards an outlet gap between two adjacent, third mirror deflecting surfaces embodied in mirror image.
• incoming gas flows are introduced into two separating units which are formed in mirror image to one another and each have four deflecting surfaces, which then leave them laterally offset with respect to the incoming flow.
• the exiting gas stream combines with an adjacent, cleaned gas stream which originates from a second gas stream entering the unit, which in turn has been divided.
• equidistant inlet gaps are distributed over the inlet surface, which are opposed by equidistant outlet gaps on the opposite side of the separator, which are each located between two inlet gaps. It is particularly expedient if two pairs of first and third or second and fourth deflecting surfaces formed in mirror image form a common component and if these components are mutually offset by approximately half the width. The deflection surfaces are preferably perpendicular, so that the separated liquid can run off downwards.
• Second and fourth deflecting surfaces and first and third deflecting surfaces can each be held on a common support, it being particularly advantageous if the supports are displaceable relative to one another transversely to their longitudinal extent, so that the distance between the first and third is thereby achieved Deflection surfaces on the one hand and second and fourth deflection surfaces on the other hand are adjustable. This enables easy access to the deflecting surfaces by simply pushing the supports far apart. In this way, the deflecting surfaces can be cleaned in a simple manner, for example by brushing, washing or spraying.
• a trough can be arranged between the supports, it being advantageous if a collecting surface is arranged on both sides of the trough, which extends essentially horizontally under the deflection surfaces.
• the collecting surfaces can be part of the carrier and can support the deflecting surfaces.
• the collecting surfaces go at their opposite the trough Page in a vertical support wall against which the components containing the deflection surfaces lie.
• the components containing the deflection surfaces can be bent from sheet metal or stainless steel, it is advantageous if these components are extruded parts.
• Figure 1 is a cross-sectional view of a first preferred embodiment of an oil separator with a plurality of components each containing two pairs of deflection surfaces;
• Figure 2 is a sectional view taken along line 2-2 in Figure 1 and
• Figure 3 a view similar to Figure 1 in a modified embodiment of an oil mist separator.
• the oil mist separator shown in the drawing comprises two supports 1 arranged parallel to one another, which have a horizontal support and collecting surface 2, followed by a downwardly directed guide wall 3 on the opposite inside and a vertically projecting support wall 4 on the outside.
• These two mirror images, which are arranged at a distance from one another, are, for example, correspondingly bent metal profile rails which are not shown by one in the drawing the distance between the drive shown can be adjusted, as indicated by the arrows C and D in FIG. 2.
• the guide walls 3 laterally delimit a trough 5 which is arranged between the two supports and extends over their entire length and which is connected to a drain in a manner which cannot be seen from the drawing.
• a larger number of identically designed components 6 are held on the collecting surfaces 2 of the two supports, and their rear faces 7 rest against the supporting walls 4. These components 6 are all of the same design, several such components 6 are arranged on each carrier 1 in such a way that a gap 8 or 9 remains free between adjacent components 6, the gaps 8 or 9 of the mutually opposite carriers being respectively one half the length of the components 6 are offset from one another, that is to say the components 6 on the two mutually opposite supports are also offset from one another by half a length of the components 6 (FIGS. 1 and 3).
• Each component 6 is mirror image of a central plane running perpendicular to the beams 1. This central plane of each component 6 coincides with the center of the gap 8 or 9 on the opposite support, and in the region of this central plane each component 6 has a flow divider 10 standing at an acute angle, the tip 11 of which splits into the gap 8 or 9 of the each opposite carrier is directed.
• the side surfaces 12 of each flow divider 10 merge into concave deflection chambers 15, 16 as seen from the opposite support, two of which are provided in each component 6 on both sides of the flow divider 10 and are mirror-symmetrical due to the overall symmetry of the component.
• deflection chambers 15 and 16 are discussed below with reference to the flow path 13, which results from the arrangement of these components for a gas flow entering the gap 8 between two adjacent components 6 of a carrier perpendicular to the longitudinal extent of the carriers. This entering gas stream is characterized by arrow A in FIG. 1.
• Such a gas stream which is loaded with liquid particles according to the task and is to be cleaned by them, enters through the gap 8 between two adjacent components 6 and meets the flow divider 10 of the opposite component 6.
• the gas stream is divided at the flow divider, in In the following, only the part deflected to the right is considered in more detail. Due to the symmetry of the overall arrangement, the flow path for the half separated to the left is obtained accordingly.
• the gas stream flows from the tip 11 of the flow divider 10 along a first deflection surface 21, which is formed by the side surface 12 of the flow divider 10 and by the adjoining, approximately circular wall of the deflection chamber 15 of the opposite component 6.
• first deflection surface 21 which is formed by the side surface 12 of the flow divider 10 and by the adjoining, approximately circular wall of the deflection chamber 15 of the opposite component 6.
• the deflection chamber 16 forms a second deflection surface 22 with an essentially circular curve, which, however, extends over a circumference of significantly more than 180 °, so that the gas flow at the deflection surface 22 is deflected to the right by an angle of approximately 240 ° .
• the gas stream emerging from the deflection chamber 16 crosses the gas stream entering the deflection chamber 16, the crossover point 25 is located approximately in the middle between the two supports exactly above the trough 5.
• the arrangement is such that both a deflection in the same direction, that is to the right in the exemplary embodiment shown, is carried out on the first as well as on the second deflection surface.
• the gas flow enters the deflection chamber 16 of the opposite component 6, namely through the strong deflection at the deflection surface 22 to the outer end of this deflection chamber 16.
• This deflection surface also results in a deflection of approximately 240 °, but this time to the left.
• This also leads to a crossover of the gas stream entering and exiting the deflection chamber 16, the crossover point 26 is located directly next to the crossover point 25, so that there is a turbulent flow area in the region of the two crossover points.
• the gas stream then arrives again in the deflection chamber 15 of the opposite component 6, this chamber forms a fourth deflection surface 24, which Deflects gas flow again by an angle of about 150 ° to the left, this deflection corresponds to the deflection at the first deflection surface 1, but in the opposite direction.
• the gas stream leaves the deflection chamber 15 along the flow divider 10 through the gap 9 approximately parallel to the direction of the incoming gas stream (arrow A).
• the emerging gas stream is symbolized by arrow B in FIG. 1.
• the gas flow covers an U-shaped path with two crossing points, two almost complete reversals of the flow direction and two three-quarter circular orbits, the deflection direction is the same for the first two distractions and opposite for the other two distractions.
• a contaminated gas quantity can be extracted from a room in a plurality of gas streams arranged next to one another, the extracted gas streams each being divided into two partial streams, which in turn then separate themselves combine again with a further partial flow and emerge clean again on the other side of the liquid separator.
• the cleaning of the liquid particles takes place by means of a cyclone effect in the individual deflection chambers, the cleaning effect being considerably improved by the crossover and the swirling caused thereby.
• Such a complementary cleaning action could be called the X-cyclone action.
• the respective deflection surfaces end in thickenings 27 and 28 with an arcuate cross-section, which particularly promote the tearing off of a cleaned gas stream from the separated liquid particles and thus support the cleaning process.
• the remaining liquid particles run vertically downwards on the vertical deflecting surfaces 21 to 24 and in particular in the area of the thickenings 27 and 28 and reach the trough 5 there either directly or via the collecting surface 2.
• FIGS. 1 and 3 do not differ fundamentally; the same parts therefore have the same reference numerals.
• the spacing of the carriers from one another is somewhat larger, and accordingly the deflecting surfaces in the direction transverse to the longitudinal direction of the carrier are somewhat elongated than in the embodiment of FIG. 3.
• the gas flow crosses twice during a complete passage.
• the change in distance between the two carriers is not only advantageous in order to enable access to the individual components 6 from the chamber side, for example for cleaning purposes, but this change in distance also enables the flow conditions to be influenced, since the precise adjustment of the mutual Distance of the components 6, the swirling and the exact guidance of the gas flow can be changed. This is clearly shown by the fact that the flow path does not run exactly perpendicular to the carrier, but rather obliquely with respect to the carrier, so that the impact points on the opposite component can be influenced by the changes in distance. An additional adjustment possibility is obtained in this way.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Separating Particles In Gases By Inertia (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6407019

Family Applications (1)

Country Status (2)

Cited By (9)

Families Citing this family (9)

Citations (3)

Family Cites Families (1)

• 1990
  • 1990-05-23 DE DE19904016582 patent/DE4016582A1/de active Granted
• 1991
  • 1991-04-26 WO PCT/EP1991/000813 patent/WO1991017813A1/de unknown

Patent Citations (3)

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