WO2010115571A1 - Wet gas scrubber - Google Patents
Wet gas scrubber Download PDFInfo
- Publication number
- WO2010115571A1 WO2010115571A1 PCT/EP2010/002061 EP2010002061W WO2010115571A1 WO 2010115571 A1 WO2010115571 A1 WO 2010115571A1 EP 2010002061 W EP2010002061 W EP 2010002061W WO 2010115571 A1 WO2010115571 A1 WO 2010115571A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- venturi
- wet gas
- gas scrubber
- gas
- zone
- Prior art date
Links
- 239000007789 gas Substances 0.000 claims abstract description 82
- 238000004140 cleaning Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 2
- 238000011086 high cleaning Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/10—Venturi scrubbers
-
- 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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- 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
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
Definitions
- This invention relates to a wet gas scrubber for removing solid and/or liquid particles from gases with a Venturi zone adjustable with respect to the flow cross-section, comprising a plurality of Venturi channels through which a mixture of the gas to be cleaned and the cleaning liquid droplets injected into the gas stream through a nozzle is guided.
- wet gas scrubbers for removing solid and/or liquid particles from gases are known, including those which utilize the so-called Venturi effect.
- the inlet gas stream to be cleaned here is utilized to decompose the cleaning liquid into extremely fine droplets which capture particle- and droplet-shaped impurities from the gas stream to be cleaned and can thus be discharged.
- Simple Venturi gas scrubbers have a central throat region with constant cross- section, to the inlet side of which a cone narrowing in flow direction is adjoined and to the outlet side of which a cone expanding in flow direction is adjoined. Therefore, such gas scrubbers can only be used effectively over a not too large range of gas flow rates. For this reason, more expensive Venturi gas scrubbers have already been proposed, in which the cross-section of the throat region can be varied for different gas flow rates, in order to maintain the cleaning effect.
- the object of the present invention to obtain an adjustable Venturi cleaning zone in a wet gas scrubber as mentioned above, in which a uniform gas velocity and consequently a uniform pressure drop is effected in a simple way, even if the flowing gas volume fluctuates, so that a uniform cleaning effect can always be achieved.
- this object in particular is solved in such wet gas scrubber in that the Venturi channels are formed between two substantially parallel Venturi plates provided with segments preferably arranged in a star shape, which engage in each other while the Venturi channels are kept free.
- the vertical gas stream is deflected horizontally, wherein gas and liquid in the Venturi channels undergo a strong acceleration. This results in the generation of a large number of extremely fine droplets and an intensive, thorough mixing with the particles.
- the Venturi plates can be adjusted in their distance relative to each other. In this way, a constantly high cleaning effect can be achieved even with greater fluctuations of the volumetric gas flow, because by relative adjustment of the coaxial Venturi plates the Venturi channel cross-sections can synchronously be adjusted and hence the total Venturi channel cross-section can be adjusted.
- the adjustment of the Venturi Plates relative to each other preferably can be controlled automatically in dependence on the changing difference of the gas pressure before and after the Venturi zone, i.e. between inlet cone and outlet cone of the Venturi zone.
- the Venturi channels formed between the Venturi plates extend substantially radially and are curved in the same direction in accordance with a particular embodiment of the invention. They are distributed over the Venturi plates in a star shape at the same angular intervals, in order to achieve a uniform flow pattern.
- the two Venturi plates advantageously lie one above the other, and preferably the lower Venturi plate is fixed and the upper Venturi plate is vertically adjustable.
- a reliable control of a uniform pressure drop in the Venturi zone can be achieved in that the one Venturi plate substantially has the negative shape of the second Venturi plate.
- An even more complete cleaning of the gases with the wet gas scrubber of the invention can be achieved in that the gas leaving the Venturi zone enters a second cleaning zone constituting a cyclone with a spin, in which second cleaning zone the solid and/or liquid particles from the gas are captured by the injected cleaning liquid droplets, guided to the housing wall of the cyclone and discharged from the same for instance due to gravity.
- the mixture of gas to be cleaned and cleaning liquid droplets is introduced into the Venturi zone preferably vertically from the top to the bottom, so that it can leave the Venturi zone horizontally into the cyclone. Carry-over of droplets into the cleaned gas stream is minimized.
- the cleaned gas then can be guided out of the housing of the cyclone, which the captured solid and/or liquid particles leave in downward direction, through a central upper outlet.
- the measure that the two cleaning zones are accommodated in one and the same housing serves for a compact protected construction of the wet gas scrubber.
- Fig. 1 schematically shows a vertical section through an embodiment of a wet gas scrubber including the invention
- Fig. 2 shows a partial section through a modified version of the wet gas scrubber as shown in Fig. 1 , and
- Fig. 3A-D show the Venturi plates used for example in the wet gas scrubber in an enlarged representation as compared to Figures 1 and 2 in perspective, side and top views.
- the wet gas scrubber shown in the drawing serves to remove solid and/or liquid particles from water-saturated gases with constantly high cleaning efficiency.
- An adjustable Venturi cleaning zone formed by two horizontally arranged Venturi plates 5, 6 adjustable in their relative distance to each other, ensures the uni- form cleaning efficiency in that a uniform gas velocity and consequently a uniform pressure drop is achieved with a fluctuating gas volume.
- the adjustable Venturi zone includes a plurality of curved Venturi channels 9, 9 1 which extend from radially inside to radially outside between correspondingly designed protruding segments 10, 10' of the Venturi plates 5, 6.
- cleaning liquid is injected into the gas to be cleaned, which is introduced into the wet gas scrubber from above, before it reaches the Venturi zone.
- the mixture of gas to be cleaned and cleaning liquid droplets then gets into the horizontal, but curved Venturi channels 9, 9', whose flow cross-section can be varied simultaneously by adjusting the distance of the Venturi plates 5, 6.
- the mixture flows out of the Venturi zone with a spin along the outer periphery and gets into a second cleaning stage which is formed as a cyclone cleaner 11.
- the two cleaning. zones are accommodated in a common housing 1.
- the solid and/or liquid particles are captured by the cleaning liquid droplets and precipitated on the housing wall 8, where they are downwardly discharged from the conical outlet 2.
- the housing has a flat bottom. The solid and/or liquid particles then can be withdrawn, e.g. also through a non-illustrated lateral outlet.
- the cleaned gas flows upwards in the housing 1 , gets into a central gas outlet 4 via outlet slots 4' and exits to the outside.
- the water-saturated gas and the injected cleaning liquid initially flow vertically into the Venturi zone, which is formed by the Venturi plates 5, 6 equipped with curved Venturi channels 9, 9'.
- a stationary lower Venturi plate 5 equipped with protruding segments 10, which together with an upper vertically adjustable Venturi plate 6 equipped with protruding segments 10' forms a plurality of Venturi channels 9, 9', deflects the gas/liquid mixture into the horizontal.
- the vertical gas/liquid stream gets into the horizontal star-shaped Venturi channels 9, 9', where it is accelerated.
- the high velocity in the small throat region of the individual Venturi channels 9, 9' of the Venturi zone generates a large number of very fine liquid droplets.
- the particles contained in the gas are intensively mixed with the mist of these tiny liquid droplets. Due to the high relative velocity between droplets, particles and gas, the particles are captured by the droplets.
- the gas pressure drop is kept constant by regulating the total flow cross-section of the Venturi channels 9, 9'.
- the adjust- ment of cross-section is effected with the second Venturi plate 6, which represents a negative shape of the lower, stationary Venturi plate 5, so that the two plates 5, 6 can plunge into each other more or less, in order to determine the Venturi cross-section of the Venturi throat.
- This adjustment can be effected automatically, controlled by setpoints of the gas pressure difference across the Venturi zone.
- the mixture of gas and cleaning liquid droplets emerging from the Venturi zone receives a spin due to the horizontal star-shaped and curved design of the Ven- turi channels 9, 9', i.e. it enters the cyclone cleaner 11 with a spin.
- the liquid droplets, the particles and the gas are caused to rotate due to a centrifugal force along the housing wall 8 thereof. This force causes an additional agglomeration of particles and liquid droplets. Due to the helical movement of the mixture of gas and liquid droplets, the latter and the particles are separated and collected in the cone-shaped outlet 2 of the housing 8, whereas the cleaned gas flows upwards into the central outlet 4 and to the outside.
- the invention substantially is characterized by an infinitely variably adjustable four-channel Venturi cleaning zone.
- the flow cross-section and the shape of the entire Venturi cleaning zone are adjustable proportional to the pressure gradient, so that the gas flow model remains unchanged for each cross-sectional size.
- the adjustment of the individual Venturi channels is effected synchronously. Due to the curved Venturi outlet diffuser, an additional cyclone effect is obtained.
- the Venturi cleaning zone and the cyclone cleaning zone are combined in one and the same housing.
- An automatic control is effected via the pressure drop, so that in the case of fluctuating gas flows the cleaning efficiency remains the same. There are no uncontrolled turbulences and a carry-over of droplets is minimized. Furthermore, certain cleaning effects can be preselected. The adjustment of the cleaning effect can be accomplished from outside.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Particles Using Liquids (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10718860A EP2416867A1 (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
CA2752147A CA2752147A1 (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
BRPI1014823A BRPI1014823A2 (en) | 2009-04-09 | 2010-03-31 | "wet gas scrubber" |
AU2010234013A AU2010234013A1 (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
US13/259,364 US8691000B2 (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
EA201190147A EA201190147A1 (en) | 2009-04-09 | 2010-03-31 | WET GAS CLEANER |
CN2010800128397A CN102438724A (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
MX2011010460A MX2011010460A (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009016731A DE102009016731B4 (en) | 2009-04-09 | 2009-04-09 | Wet scrubbers |
DE102009016731.5 | 2009-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010115571A1 true WO2010115571A1 (en) | 2010-10-14 |
Family
ID=42352489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/002061 WO2010115571A1 (en) | 2009-04-09 | 2010-03-31 | Wet gas scrubber |
Country Status (11)
Country | Link |
---|---|
US (1) | US8691000B2 (en) |
EP (1) | EP2416867A1 (en) |
CN (1) | CN102438724A (en) |
AU (1) | AU2010234013A1 (en) |
BR (1) | BRPI1014823A2 (en) |
CA (1) | CA2752147A1 (en) |
CL (1) | CL2011002502A1 (en) |
DE (1) | DE102009016731B4 (en) |
EA (1) | EA201190147A1 (en) |
MX (1) | MX2011010460A (en) |
WO (1) | WO2010115571A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114225606A (en) * | 2020-09-09 | 2022-03-25 | 财团法人工业技术研究院 | Particulate trapping system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010022840A1 (en) | 2010-06-07 | 2011-12-08 | Outotec Oyj | Radial flow scrubber for separating dust and pollutants from useful- and exhaust gases, has circular segment cylinder with multiple circular segments spaced from each other |
EP2900133B1 (en) * | 2012-09-25 | 2019-02-27 | Inhalation Sciences Sweden AB | Exposure method and device for aerosol and model material interaction |
WO2014053150A1 (en) | 2012-10-05 | 2014-04-10 | Outotec Oyj | Radial-flow scrubber |
PL3083007T3 (en) | 2013-12-20 | 2018-09-28 | Outotec (Finland) Oy | Method and wet scrubber for removing particles from gases |
US10222302B1 (en) * | 2014-11-06 | 2019-03-05 | Mayeaux Holding Llc | Cyclonic system for enhanced separation in fluid sample probes and the like |
US9909956B1 (en) | 2014-12-03 | 2018-03-06 | Mayeaux Holding Llc | Cyclonic system for enhanced separation of fluid samples and the like, and method therefore |
CN107744708A (en) * | 2017-11-13 | 2018-03-02 | 湖北徐风环保科技有限公司 | A kind of wet type fine particle capture device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3746322A (en) * | 1972-01-03 | 1973-07-17 | Andco Inc | Gas scrubber |
DE2311314A1 (en) * | 1973-03-07 | 1974-09-12 | Artur Simon Maschb Gmbh | Centrifugal wet dust separator - having venturi passages through rotor made from sheet steel |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE685365A (en) | 1965-08-14 | 1967-01-16 | ||
DE2224519C3 (en) * | 1972-05-19 | 1974-10-24 | Metallgesellschaft Ag, 6000 Frankfurt | Single or multi-stage washer |
US3913399A (en) * | 1974-07-08 | 1975-10-21 | Oliver P Sheeks | Rate-of-flow meter with attached generator |
US3998612A (en) * | 1975-09-05 | 1976-12-21 | Schneible Company | Annular venturi gas scrubber |
US4198815A (en) * | 1975-12-24 | 1980-04-22 | General Electric Company | Central injection fuel carburetor |
FR2564331B1 (en) * | 1984-05-15 | 1986-10-03 | Air Ind Systemes Sa | IMPROVEMENTS RELATING TO POLLUTION GAS CLEANING PLANTS BY SOLID AND / OR LIQUID PARTICLES |
FI87541C (en) | 1991-04-19 | 1993-01-25 | Outokumpu Research Oy | Flergastvättare |
US20080307964A1 (en) * | 2004-04-09 | 2008-12-18 | Turbosonic Inc. | Pollution Control in Wood Products Dryer |
CA2607978C (en) * | 2005-05-12 | 2013-08-06 | Turbosonic Inc. | Pollution control in wood products dryer operation |
-
2009
- 2009-04-09 DE DE102009016731A patent/DE102009016731B4/en not_active Expired - Fee Related
-
2010
- 2010-03-31 BR BRPI1014823A patent/BRPI1014823A2/en not_active IP Right Cessation
- 2010-03-31 EA EA201190147A patent/EA201190147A1/en unknown
- 2010-03-31 MX MX2011010460A patent/MX2011010460A/en unknown
- 2010-03-31 AU AU2010234013A patent/AU2010234013A1/en not_active Abandoned
- 2010-03-31 CN CN2010800128397A patent/CN102438724A/en active Pending
- 2010-03-31 US US13/259,364 patent/US8691000B2/en not_active Expired - Fee Related
- 2010-03-31 EP EP10718860A patent/EP2416867A1/en not_active Withdrawn
- 2010-03-31 CA CA2752147A patent/CA2752147A1/en not_active Abandoned
- 2010-03-31 WO PCT/EP2010/002061 patent/WO2010115571A1/en active Application Filing
-
2011
- 2011-10-07 CL CL2011002502A patent/CL2011002502A1/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3746322A (en) * | 1972-01-03 | 1973-07-17 | Andco Inc | Gas scrubber |
DE2311314A1 (en) * | 1973-03-07 | 1974-09-12 | Artur Simon Maschb Gmbh | Centrifugal wet dust separator - having venturi passages through rotor made from sheet steel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114225606A (en) * | 2020-09-09 | 2022-03-25 | 财团法人工业技术研究院 | Particulate trapping system |
US11850606B2 (en) | 2020-09-09 | 2023-12-26 | Industrial Technology Research Institute | Particles capturing system |
Also Published As
Publication number | Publication date |
---|---|
EA201190147A1 (en) | 2012-04-30 |
DE102009016731A1 (en) | 2010-10-14 |
EP2416867A1 (en) | 2012-02-15 |
BRPI1014823A2 (en) | 2016-04-05 |
CA2752147A1 (en) | 2010-10-14 |
US8691000B2 (en) | 2014-04-08 |
CN102438724A (en) | 2012-05-02 |
US20120000366A1 (en) | 2012-01-05 |
CL2011002502A1 (en) | 2012-02-17 |
MX2011010460A (en) | 2011-10-17 |
DE102009016731B4 (en) | 2013-02-21 |
AU2010234013A1 (en) | 2011-09-01 |
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