US3703800A - Humid de-dusting device for gas-conveyor conduits - Google Patents
Humid de-dusting device for gas-conveyor conduits Download PDFInfo
- Publication number
- US3703800A US3703800A US127635A US3703800DA US3703800A US 3703800 A US3703800 A US 3703800A US 127635 A US127635 A US 127635A US 3703800D A US3703800D A US 3703800DA US 3703800 A US3703800 A US 3703800A
- Authority
- US
- United States
- Prior art keywords
- conduit
- gas
- venturi
- dusting device
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
- B01D2247/101—Means for removing the washing fluid dispersed in the gas or vapours using a cyclone
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/54—Venturi scrubbers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Separation Of Particles Using Liquids (AREA)
- Cyclones (AREA)
Abstract
Device intended to free a flow of gas from the dust and solid particles which it carries in suspension. It comprises a venturi wherein water is sprayed and which is comprised between a junction converging portion having a apex angle in the vicinity of 90* and a junction diverging portion having an apex angle in the vicinity of 90*. This latter is provided, on the one hand, with means for setting into rotation the flow of humidified gas, on the other hand, with a centrifugal separation conduit with an axial transfer sleeve. This de-duster device may be inserted into a conduit system of ventilation air such as the ventilation pipes of underground mine workings.
Description
Umted States Patent 1 3,703,800
Courbon [451 Nov. 28, 1972 54] HUMID DE-DUSTING DEVICE FOR 2,871,973 2/1959 Roujob ..55/23s x GAS-CONVEYOR CONDUITS 2,935,375 5/1960 Bou cher ..23/2 [72] Inventor, Paul Combo, Oise, France 3,106,459 /1963 Osgood et a1 ..23/259.6
[73] Assignee: Charbonnages De France, Paris, primary Examfner DenniS E Talbert, JL
France Att0mey--Karl w. Flocks 22 Filed: March 24, 1971 Appl. No.: 127,635
[] Foreign Application Priority Data April 8, 1970 France ..7012770 [52] US. Cl. ..55/238, /257, 55/260, 55/435, 55/457, 261/116, 26l/DlG. 54 [51] Int. Cl. ..B01d 47/10 [58] Field of Search ..55/240, 238, 257, 260, 435, 55/457; 261/116, DIG. 54
[56] References Cited UNITED STATES PATENTS 2,032,404 3/1936 Fisher ..261/1 16 2,337,983 12/1943 Fisher ..261/DIG. 54
[57] ABSTRACT Device intended to free a flow of gas from the dust and solid particles which it carries in suspension.
It comprises a venturi wherein water is sprayed and which is comprised between a junction converging portion having a apex angle in the vicinity of and a junction diverging portion having an apex angle in the vicinity of 90. This latter is provided, on the one hand, with means for setting into rotation the flow of humidified gas, on the other hand, with a centrifugal separation conduit with an axial transfer sleeve.
This de-duster device may be inserted into a conduit system of ventilation air such as the ventilation pipes of underground mine workings.
7 Claims, 5 Drawing Figures PATENTED 3,703,800
Fig.3
ATTORNEY INVENTOR' HUMID DE-DUSTING DEVICE FOR GAS- CONVEYOR CONDUITS The present invention relates to a device known as de-dusters, intended to free a flow of gas from the dust and solid particles which it carries in suspension.
De-dusting apparatus is already known which utilizes the principle of the increase in weight of solid particles of pollution by mixing the flow of polluted gas with an aerosol dispersed in the turbulent medium formed by the neck of a venturi, the droplets of polluted water being subsequently arrested by transverse impact means such as impact plates or rings.
The known devices are complicated and generally have dimensions and loss of pressure such that they can only be used with difficulty for de-dusting a flow of gas circulating in very long conduits.
The present invention relates to an apparatus of simple construction, of small overall size and more particularly adapted to be inserted in a conduit system of ventilation air such as the ventilation pipes of underground mine workings.
The device according to the invention is characterized by the fact that the venturi is on the one hand preceded by a junction stage constituted successively by a cylindrical portion having a diameter equal to the diameter of the conduit, and by a convergent portion having an apex angle in the vicinity of 90, and on the other hand it is followed by a header stage formed successively by a frusto-conical divergent junction having an apex angle in the vicinity of 90 and provided with means for setting in rotation the humidified flow of gas, and by.a centrifugal separation conduit of generally cylindrical shape and provided with an axial transfer sleeve.
The present invention will be better understood by reference to the description which follows below, and referring to the accompanying drawings, in which FIGS. 1 and 3 are two views in cross-section-elevation of two forms of embodiment of the device according to the invention;
FIGS. 2 and 4 show respectively two views in transverse section made at the level of the centrifugal separation conduit;
and FIG. is a view in transverse section of an advantageous alternative form of the centrifugal separation conduit.
In the figures of the accompanying drawings, the reference I indicates the conduit in which the flow of gas to be purified is set into circulation in the direction of flow shown symbolically by the arrow F, by means of a fan (not shown).
In the text which follows, it will be assumed that all the elements described have a form of revolution having as their axis x'x the axis of the conduit.
The de-dusting device according to the invention comprises, in succession in the direction F:
An upstream cylindrical junction section 2 having a diameter equal to that of the conduit 1;
An upstream frusto-conical coupling convergent 3 having an apex angle in the vicinity of 90;
A venturi 4;
A downstream coupling divergent 5 having an apex angle in the vicinity of 90, provided with means for setting the flow of gas in rotation, constituted by a divergent conical deflector 6 having an axis x-x, supported by radial blades 7 fixed to the internal wall of .the divergent 5 and impressing on the flow of gas a movement of rotation shown symbolically by the arrow f;
And a centrifugal separation stage, constituted by a conduit 8 of generally cylindrical shape, having a diameter equal to the diameter of the conduit 1 and coupled to the downstream portion of the conduit by means of a transfer sleeve 9 passing through a transverse wall 10.
The separation stage 8 has the shape of an elongated ejector, the tangential opening 11 of which is directed downwards and in the direction opposite to the rotation of the flow of gas f.
In more precise terms, the wall of the collection stage comprises a flat vertical portion 12 tangential to a cylindrical portion 13 which is in turn coupled to the opening 11 by means of a flat tangential portion 14 inclined with respect to the horizontal.
The venturi is provided with water-spraying means 15 discharging in proximity to the intake of the neck of the venturi.
Advantageously, the convergent portion 16 and the neck 17 of the venturi have an identical length with a value equal to that of the diameter of the neck 17.
In FIG. '1, the convergent portion l6'and the divergent portion 18 of the venturi have a frusto-conical shape and have respectively apex angles of 21 and 7.
As shown in FIG. 3, the convergent 16 and the divergent 18 may be shaped so as to form a discharge nozzle.
The apex angle of the conical deflector 6 preferably has a value such that the straight annular outlet section S provided for the passage of the flow of gas at the level of the base 19 of the deflector 6, is at least equal to the straight inlet section S provided for the passage of the flow of gas at the level of the point 20 of the deflector 6.
The dust in suspension in the flow of gas is collected in the following manner. It is collected in the venturi by the droplets of water spray; the blades 7 impress on the purified glow of gas and on the droplets of polluted water a movement of rotation f which is superimposed on the movement of translation F, and centrifugal force drives the droplets of water against the internal wall 21 of the collection stage 8, the flow of purified gas being evacuated by means of the transfer sleeve 10.
In this stage, the inclined flat portion 14 serves as a run-off plane for a film of water 22 deposited against the internal wall 21 of the collection stage, while the flat vertical portion 12 serves as an impact plate for the finest droplets of water which are not deposited against the internal wall 21 at the outlet of the setting-in-rotation stage, and at the same time prevents a continuous movement of rotation of the film of water 22 which would be likely to be established if the internal wall 21 were entirely cylindrical.
The form of embodiment shown in FIGS. 1 and 2 is more particularly adapted to the case in which the fan (not shown) is located on the upstream side of the collection device.
In the form of embodiment shown in FIGS. 3 and 4, the opening of the evacuation conduit 23, which extends downwards the opening 11 of the ejector, is provided with lower closure clappers 24. This form of embodiment is more particularly adapted to the case in which the fan is located on the downstream side of the collection device.
in order to improve the collection and evacuation of the droplets of polluted water, it may be advantageous to make the internal wall 21 of the conduit 8 rough, for example by means of a rough coating or of a curved plate of expanded metal 25 (see FIG.
I claim l. A de-dusting device of the type comprising a venturi, at the neck of which is discharged a water-spraying device, inserted in a conveyor conduit of a flow of gas for the purpose of removing dust and solid particles which are carried in suspension in the said gas, said device comprising:
on the upstream side of said venturi, a junction stage constituted successively by: a cylindrical portion of the same diameter as that of the upstream portion of said conveyor conduit; and by a convergent portion having an apex angle in the vicinity of 90; on the downstream side of said venturi, a collector stage constituted successively by: a frusto-conical junction divergent having an apex angle in the vicinity of 90; and by a centrifugal separation conduit of generally cylindrical shape provided with an axial transfer sleeve communicating with the downstream portion of said conveyor conduit; and means for setting into rotation the flow of humidified gas coming from the venturi, constituted by a divergent conical deflector coupled to the internal wall of said frustoconical junction divergent by means of radial blades and delimiting with this latter a passage having a straight annular section; the apex angle of said deflector being detenninal so posite sense to the direction of movement of rotation impressed on said flow of gas by said radial blades.
3. A de-dusting device as claimed in claim 2, in which said evacuation slot is delimited in width by a vertical wall tangential to the upper cylindrical portion of said separation conduit, and by the edge of the wall slightly inclined downwards and tangential to the lower cylindrical portion of said separation conduit.
4. A de-dusting device as claimed in claim 3, in I which said evacuation slot is extended downwards by a parallelepiped evacuation conduit provided at its lower portion with a closure clapper opened by gravity.
5. A de-dusting device as claimed in claim 1, in which the internal wall of said separation conduit is made rough.
6. Ade-dusting device as claimed in claim 1, in which the internal wall of said separation conduit is covered by a curved surface of expanded metal.
7. A de-dusting device as claimed in claim 1, in which said convergent and the neck of said venturi have identically the same length having a value equal to that of the diameter of said neck.
Claims (7)
1. A de-dusting device of the type comprising a venturi, at the neck of which is discharged a water-spraying device, inserted in a conveyor conduit of a flow of gas for the purpose of removing dust and solid particles which are carried in suspension in the said gas, said device comprising: on the upstream side of said venturi, a junction stage constituted successively by: a cylindrical portion of the same diameter as that of the upstream portion of said conveyor conduit; and by a convergent portion having an apex angle in the vicinity of 90*; on the downstream side of said venturi, a collector stage constituted successively by: a frusto-conical junction divergent having an apex angle in the vicinity of 90*; and by a centrifugal separation conduit of generally cylindrical shape provided with an axial transfer sleeve communicating with the downstream portion of said conveyor conduit; and means for setting into rotation the flow of humidified gas coming from the venturi, constituted by a divergent conical deflector coupled to the internal wall of said frustoconical junction divergent by means of radial blades and delimiting with this latter a passage having a straight annular section; the apex angle of said deflector being determinal so that the surface area of the straight section provided for the passage of the gases at the level of the base of said deflector is at least equal to the surface area of the straight section provided for the passage of the gases at the level of the point of said deflector.
2. A de-dusting device as claimed in claim 1, in which said centrifugal separation conduit has the shape of an elongated ejector provided at its lower portion with a longitudinal evacuation slot directed in the opposite sense to the direction of movement of rotation impressed on said flow of gas by said radial blades.
3. A de-dusting device as claimed in claim 2, in which said evacuation slot is delimited in width by a vertical wall tangential to the upper cylindrical portion of said separation conduit, and by the edge of the wall slightly inclined downwards and tangential to the lower cylindrical portion of said separation conduit.
4. A de-dusting device as claimed in claim 3, in which said evacuation slot is extended downwards by a parallelepiped evacuation conduit provided at its lower portion with a closure clapper opened by gravity.
5. A de-dusting device as claimed in claim 1, in which the internal wall of said separation conduit is made rough.
6. A de-dusting device as claimed in claim 1, in which the internal wall of said separation conduit is covered by a curved surface of expanded metal.
7. A de-dusting device as claimed in claim 1, in which said convergent and the neck of said venturi have identically the same length having a value equal to that of the diameter of said neck.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7012770A FR2085316A1 (en) | 1970-04-08 | 1970-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3703800A true US3703800A (en) | 1972-11-28 |
Family
ID=9053652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US127635A Expired - Lifetime US3703800A (en) | 1970-04-08 | 1971-03-24 | Humid de-dusting device for gas-conveyor conduits |
Country Status (8)
Country | Link |
---|---|
US (1) | US3703800A (en) |
AT (1) | AT321871B (en) |
BE (1) | BE763445A (en) |
DE (1) | DE2116482C2 (en) |
FR (1) | FR2085316A1 (en) |
GB (1) | GB1317348A (en) |
LU (1) | LU62685A1 (en) |
NL (1) | NL170376C (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5363771A (en) * | 1976-09-07 | 1978-06-07 | Bischoff Gasreinigung | Ring aperture type washing apparatus for purification of gas |
US4136036A (en) * | 1976-04-07 | 1979-01-23 | Eastman Kodak Company | Collection and dispensing device for non-pressurized liquids |
US4401444A (en) * | 1981-08-27 | 1983-08-30 | Teller Enviromental Systems, Inc. | Process for removing particulates from gas with liquid particulate condensation |
US4921546A (en) * | 1987-07-27 | 1990-05-01 | Naylor Industrial Services, Inc. | Method and apparatus for cleaning conduits |
US4922937A (en) * | 1987-07-27 | 1990-05-08 | Naylor Industrial Services | Method and apparatus for cleaning conduits |
US5017203A (en) * | 1985-05-31 | 1991-05-21 | Cox James P | Gas scrubbing apparatus and process |
US5178656A (en) * | 1990-08-15 | 1993-01-12 | Kuettner Gmbh & Co. K.G. | Solid particle separator for gas flows loaded with solid particles |
US5413626A (en) * | 1992-12-23 | 1995-05-09 | Norddeutsche Affinerie Aktiengesellschaft | Process for the wet cleaning of gases |
US6468321B2 (en) * | 2001-01-10 | 2002-10-22 | John W. Kinsel | Blade and skirt assembly for directional gas cleaning and drying system |
WO2003102407A1 (en) * | 2002-05-31 | 2003-12-11 | Catalytica Energy Systems, Inc. | Fuel-air premixing system for a catalytic combustor |
CN104606988A (en) * | 2015-01-21 | 2015-05-13 | 沈阳鼓风机集团洁净煤气化技术有限公司 | Wet type dust removal device |
WO2019186430A3 (en) * | 2018-03-27 | 2019-11-07 | Aerizone Industries (Pty) Limited | A scrubber with a frusto-conical body and a frusto-conical insert |
CN111502738A (en) * | 2020-04-30 | 2020-08-07 | 辽宁工程技术大学 | Dust control and removal device for mine driving working face and use method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT330136B (en) * | 1971-02-01 | 1976-06-10 | Waagner Biro Ag | WASHING DEVICE FOR RAW GAS STREAMS CONTAINED IN DUST OR POLLUTED BY NUDE GAS COMPONENTS |
CN106731430A (en) * | 2017-04-05 | 2017-05-31 | 哈尔滨锅炉厂环保工程技术有限公司 | A kind of venturi bundled tube dedusting demister |
CN114146522B (en) * | 2021-11-30 | 2023-02-03 | 华能吉林发电有限公司长春热电厂 | Venturi wet dust removal device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2032404A (en) * | 1935-06-03 | 1936-03-03 | Ernest F Fisher | Air cooling, washing, and humidifying apparatus |
US2337983A (en) * | 1941-05-13 | 1943-12-28 | Ernest F Fisher | Spray booth |
US2871973A (en) * | 1955-03-04 | 1959-02-03 | Belge Prat Daniel Sa Soc | Apparatus for washing gases |
US2935375A (en) * | 1956-02-17 | 1960-05-03 | Gulton Ind Inc | Method of purifying a gaseous current containing an aerosol |
US3106459A (en) * | 1962-01-10 | 1963-10-08 | Huber Corp J M | Carbon black collection systems |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT223176B (en) * | 1960-01-30 | 1962-09-10 | Gerhard Ing Miczek | Wet separator |
-
1970
- 1970-04-08 FR FR7012770A patent/FR2085316A1/fr not_active Withdrawn
-
1971
- 1971-02-25 BE BE763445A patent/BE763445A/en not_active IP Right Cessation
- 1971-02-26 LU LU62685D patent/LU62685A1/xx unknown
- 1971-03-24 NL NLAANVRAGE7103925,A patent/NL170376C/en not_active IP Right Cessation
- 1971-03-24 US US127635A patent/US3703800A/en not_active Expired - Lifetime
- 1971-03-31 AT AT273071A patent/AT321871B/en not_active IP Right Cessation
- 1971-04-05 DE DE2116482A patent/DE2116482C2/en not_active Expired
- 1971-04-19 GB GB2618171*A patent/GB1317348A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2032404A (en) * | 1935-06-03 | 1936-03-03 | Ernest F Fisher | Air cooling, washing, and humidifying apparatus |
US2337983A (en) * | 1941-05-13 | 1943-12-28 | Ernest F Fisher | Spray booth |
US2871973A (en) * | 1955-03-04 | 1959-02-03 | Belge Prat Daniel Sa Soc | Apparatus for washing gases |
US2935375A (en) * | 1956-02-17 | 1960-05-03 | Gulton Ind Inc | Method of purifying a gaseous current containing an aerosol |
US3106459A (en) * | 1962-01-10 | 1963-10-08 | Huber Corp J M | Carbon black collection systems |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4136036A (en) * | 1976-04-07 | 1979-01-23 | Eastman Kodak Company | Collection and dispensing device for non-pressurized liquids |
JPS5363771A (en) * | 1976-09-07 | 1978-06-07 | Bischoff Gasreinigung | Ring aperture type washing apparatus for purification of gas |
US4401444A (en) * | 1981-08-27 | 1983-08-30 | Teller Enviromental Systems, Inc. | Process for removing particulates from gas with liquid particulate condensation |
US5017203A (en) * | 1985-05-31 | 1991-05-21 | Cox James P | Gas scrubbing apparatus and process |
US4921546A (en) * | 1987-07-27 | 1990-05-01 | Naylor Industrial Services, Inc. | Method and apparatus for cleaning conduits |
US4922937A (en) * | 1987-07-27 | 1990-05-08 | Naylor Industrial Services | Method and apparatus for cleaning conduits |
US5178656A (en) * | 1990-08-15 | 1993-01-12 | Kuettner Gmbh & Co. K.G. | Solid particle separator for gas flows loaded with solid particles |
US5413626A (en) * | 1992-12-23 | 1995-05-09 | Norddeutsche Affinerie Aktiengesellschaft | Process for the wet cleaning of gases |
US6468321B2 (en) * | 2001-01-10 | 2002-10-22 | John W. Kinsel | Blade and skirt assembly for directional gas cleaning and drying system |
WO2003102407A1 (en) * | 2002-05-31 | 2003-12-11 | Catalytica Energy Systems, Inc. | Fuel-air premixing system for a catalytic combustor |
US20040021235A1 (en) * | 2002-05-31 | 2004-02-05 | Catalytica Energy Systems, Inc. | Fuel-air premixing system for a catalytic combustor |
US7093445B2 (en) | 2002-05-31 | 2006-08-22 | Catalytica Energy Systems, Inc. | Fuel-air premixing system for a catalytic combustor |
CN104606988A (en) * | 2015-01-21 | 2015-05-13 | 沈阳鼓风机集团洁净煤气化技术有限公司 | Wet type dust removal device |
CN104606988B (en) * | 2015-01-21 | 2016-06-29 | 沈阳鼓风机集团洁净煤气化技术有限公司 | A kind of wet dust separater |
WO2019186430A3 (en) * | 2018-03-27 | 2019-11-07 | Aerizone Industries (Pty) Limited | A scrubber with a frusto-conical body and a frusto-conical insert |
CN111502738A (en) * | 2020-04-30 | 2020-08-07 | 辽宁工程技术大学 | Dust control and removal device for mine driving working face and use method |
CN111502738B (en) * | 2020-04-30 | 2021-12-31 | 辽宁工程技术大学 | Dust control and removal device for mine driving working face and use method |
Also Published As
Publication number | Publication date |
---|---|
GB1317348A (en) | 1973-05-16 |
NL7103925A (en) | 1971-10-12 |
LU62685A1 (en) | 1971-10-06 |
FR2085316A1 (en) | 1971-12-24 |
AT321871B (en) | 1975-04-25 |
DE2116482C2 (en) | 1982-10-21 |
NL170376C (en) | 1982-11-01 |
DE2116482A1 (en) | 1971-10-28 |
BE763445A (en) | 1971-08-25 |
NL170376B (en) | 1982-06-01 |
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