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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
  • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
  • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
  • B01D46/0031—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid with collecting, draining means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies

Definitions

• the invention relates to a device for the separation of liquid droplets, in particular oil, from a gas stream according to the preamble of the main claim.
• gases that are enriched with drops of liquid, especially oil drops, and thus form so-called aerosols, which may be harmful to downstream aggregates.
• drops of liquid can mechanically, z. B. are entrained in the passage of the gas through the liquid or in a guide of the gas flow over a liquid or are included by design.
• mist eliminators may be formed in a conventional manner as inertial, wherein the inertia of the drops is used to deposit the drops on walls.
• Inertia separators are particularly suitable for larger drops, usually above about 20 microns droplet diameter.
• a simple form of mist eliminator is a baffle plate in which a gas stream charged with liquid droplets is directed against a plate so that the gas flow changes direction. As a result of the inertia, drops contained in the gas stream retain their direction, impinge on the plate and are discharged from there.
• a special type of inertial separation is carried out with centrifugal forces in so-called cyclones, wherein the gas flow is guided by guide elements on a curved path. Due to the centrifugal forces, the drops are guided on an outer path with the greatest possible radius of curvature. The drops can then z. B. be deposited on a wall along the outer region of the gas stream and from the wall, the drops can be derived and optionally recycled back into the system.
• Such a guide element for an oil separator in a screw compressor is known for example from DE 36 42 002 C, in which an axially entering flow of a gas stream to be cleaned is diverted into a radially outward flow and then the liquid droplets in an outer annular Flow channel are derived.
• Such devices for the separation of liquid droplets are also constructed in several stages, wherein the aforementioned cyclones are used as pre-and / or Nachabscheider and then main separator then called drainage elements are used.
• a gas stream laden with liquid droplets is separated by a reticulated and / or porous drainage structure, e.g. B. a knitted wire or a nonwoven, z. B. plastic or glass fiber, driven.
• the liquid droplets pass through the drainage structure more slowly than the gas flow and, by gravity, the liquid droplets move to the geodesic lower portion of the drainage structure, accumulate and can be discharged. Due to certain drainage structures, smaller drops combine to form larger drops, ie they coalesce, and can thus be better removed from the gas stream.
• the pre-separator is constructed so that a direct inflow of the gas stream to be cleaned with a nearly vertical impact of the gas stream is selected on a wall, even tears a vertically upwardly directed gas flow in the wall region still so many drops of liquid with it that this can lead to a disadvantageous overloading of the downstream drainage element.
• the invention relates to a device for the separation of liquid droplets from a gas stream with a Vorabscheidehunt, in which the gas stream to be cleaned is directed such that it ricochets on a wall of the pre-separation chamber and is passed vertically upward through the flow pressure in the wall region. Furthermore, a main separator arranged vertically above the preliminary separator is provided with a drainage element which can be flowed through laterally from outside to inside by the gas stream to be cleaned and which discharges the purified gas stream vertically upwards in the center.
• a guide element between the Vorabscheidehunt and the main separator is present in the outer wall region has a sealed the gas flow blocking area and the center of an open gas flow passage area, the gas flow through arranged in the central region guide parts laterally outward to the flow of the main separator is steerable.
• the gas stream to be cleaned may be, for example, the oil-enriched compressed air of a screw compressor.
• the invention can then be achieved in an advantageous manner that the oil that is sprayed with the incoming air flow against the wall and then flows up through the guide element no longer to a high oil pollution of the Main separator or the drainage element leads, since the oil flow is blocked here by the shape of the nozzle in the wall area. It can thus be used the full Vorabscheidegrad, since a pressure loss is largely avoided by a possibly clogged main separator and thus the life of the device can be extended.
• the oil can be geodetically guided and discharged in the Vorabscheidehunt in the apparatus according to the invention.
• the inventive device with the Vorabscheidehunt, the guide element and the drainage element is advantageously cylindrical and the gas stream to be cleaned is passed centrally through a correspondingly arranged opening centrally in the Vorabscheidehunt, so that essentially a collision of the gas stream with the liquid droplets on the opposite wall side of the pre-separation chamber results.
• the guide parts on the guide element are tangentially offset in a particularly advantageous manner from the inside out that results in a tangential flow of gas flow to the drainage element.
• FIG. 1 shows a schematic representation of a device as an oil separator for the compressed air of a screw compressor with a guide element according to the invention
• Figure 2 shows an embodiment of the guide element in a detailed view as a sectional view
• Figures 3 and 4 are two plan views of soclhe vanes in various embodiments.
• Embodiment (s) of the invention are two plan views of soclhe vanes in various embodiments.
• Figure 1 is a schematic representation of a device 1 for the separation of oil from the compressed air of a screw compressor shown, as described in the introduction to the description.
• the liquid droplet (oil) afflicted gas stream 2 passes through an opening 3 in a Vorabscheidehunt 4 of the device 1.
• arrows 5 is indicated as the gas stream impinges on the opposite wall 6 of the pre-separation chamber 4 and then the gas flow flows upward according to arrow 7 in the flow direction of the device 1.
• the gas flow here has so much kinetic energy that it entrains a large part of the liquid droplets, which would easily lead to a quick blockage in a direct impact with a geodetically arranged on top of main 13 with a three-nail element here.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Separating Particles In Gases By Inertia (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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ID=40229698

Family Applications (1)

Country Status (5)

Cited By (1)

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Citations (5)

Family Cites Families (23)

• 2007
  • 2007-10-26 DE DE202007015034U patent/DE202007015034U1/de not_active Expired - Lifetime
• 2008
  • 2008-10-20 CN CN2008801138327A patent/CN101835522B/zh not_active Expired - Fee Related
  • 2008-10-20 JP JP2010530416A patent/JP2011500320A/ja not_active Ceased
  • 2008-10-20 WO PCT/EP2008/064102 patent/WO2009053326A1/de not_active Ceased
  • 2008-10-20 US US12/739,824 patent/US7985273B2/en not_active Expired - Fee Related
  • 2008-10-20 DE DE112008002732.3T patent/DE112008002732B4/de not_active Expired - Fee Related

Patent Citations (5)

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