CA1170565A - Dust removal apparatus - Google Patents
Dust removal apparatusInfo
- Publication number
- CA1170565A CA1170565A CA000369292A CA369292A CA1170565A CA 1170565 A CA1170565 A CA 1170565A CA 000369292 A CA000369292 A CA 000369292A CA 369292 A CA369292 A CA 369292A CA 1170565 A CA1170565 A CA 1170565A
- Authority
- CA
- Canada
- Prior art keywords
- unit
- dust
- water
- outlet
- inlet
- 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
Links
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
- B01D47/06—Spray cleaning
-
- 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
- B01D50/10—Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Particles Using Liquids (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
ABSTRACT OF DISCLOSURE
The invention concerns a dust removal or collection unit for removing dust from the air, particularly in underground workings such as coal mines. The unit comprises, in a casing having an inlet and an outlet, means for drawing a dust-containing gaseous stream, such as air, through the unit via said inlet and outlet, means for wetting the dust with water and means for filtering out the wetted dust so that substantially dust-and water-free air leaves the outlet of the unit.
The invention concerns a dust removal or collection unit for removing dust from the air, particularly in underground workings such as coal mines. The unit comprises, in a casing having an inlet and an outlet, means for drawing a dust-containing gaseous stream, such as air, through the unit via said inlet and outlet, means for wetting the dust with water and means for filtering out the wetted dust so that substantially dust-and water-free air leaves the outlet of the unit.
Description
~ ~ 7 ~
This invention concerns apparatus for removing dust from the air, particularly in underground w-orkings.
A problem of underground working, as in mining, is the presence of respirable dust produced, for example, as a result of high speed working of modern cutting machinery. This dust can be hazardous to health and safety. For example, dust reduces the degree of visibility of operating personnel if not adequately collected or removed.
The object of this invention is to provide a dust removal or collection unit, particularly but not exclusively applicable to underground workings, and which may be mounted directly on machinery, such as a coal cutting machine, or located in a suit-able unobtrusive position.
Accordingly this invention provides a dust removal or collection unit comprising, in a casing having an inlet and an outlet, means for drawing a dust-containing gaseous stream through the unit via said inlet and outlet, means for wetting the dust with water, and filter means for filtering out the wctted dust, said filter means including a fibrous, woven or knitted type filter in a toothed formation.
The unit of the invention may also have a water collection system wherein water and possibly dust removed from the air by the filter means is collected, preferably in a sump, and removed from the unit. This water may be recirculated for use in wetting dust-containing air.
~ ~ 7 ~ 5 ~ :i Preferably the casing is generally rectangular in cross-section and has its inlet and outlet in horizontal align-ment. The means for drawing air through the unit can be an axial fan of the type wherein the blade of said fan is mounted for rotation on the drive shaft of an electric motor which drive shaft extends through the leading edge of a hollow aerodynamic strut in which the motor ;s housed.
The wetting means may be a water spinner of the type described in British Patent Specification No. 1280239 or may be a water spray system.
In a preferred embodiment the axial fan and wetting means are housed in a first part of the casing, the motor for the fan is housed in a hollow aerodynamic strut in a second part of the casing and the filter means is housed in a third part of the casing.
The third part of the casing preferably contains in ~equence a filter for separating out large lumps of any solids passing through the unit, the main fibrous, woven or knitted material filter for removing the majority of dust and separating out water and a means for trapping d ~
. ~
1 1 7~5~5 remaining water carried over from the main filter. The main ~ilter may be removable and the third part of the casing may be provided with hatches or the like for access to the filter. ~he hatches are preferably water tight. The bottom of the casing may be provided with openin~s to allow the water to escape, possibly to a sump.
~ he unit of the invention may be constructed as a compact unit so that it can be mounted on machiner~
or placed in an unobstrusive location.
This invention will now be further described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows a general sectional elevation of a dust removal unit;
Figure 2 shows a sump for the unit of ~igure 1;
Figure 3 shows a partial side view of the unit of Figures 1 and 2;
Figure 4 shows an arrangement for recirculation of water; and Figure 5 shows an alternative wetting system to that shown in the unit of ~igure 1.
Referring to Figures 1 to ~, the numeral 1 generally denotes a ca~ing definin~ a flow path for a gaseous stream, such as air, the casing 1 having a ¢enerally circular inlet 2 and a generally rectangular outlet 3.
me outlet 3 can be fitted with a rectangular to circular conversion piece 4~
~,,, ~ , , , ~-`` 1 1 7~565 A water spinner 5 of the type described in British Patent Specification ~o. 12802~9 is mounted in the inlet 2 which provides an evenly distributed wall of finely atomised water to ensure thorough wetting of dust particles. The rotatable part of the water spinner 5, supplied with water via pipe 6, is mounted on drive shaft 7 of electric motor 8 as is an impeller 9. The impeller 9 is mounted concentrically in the inlet and is manufactured from high strength steel incorporating fixed pitch æ~odynamically shaped blades.
Hub 14 of the impeller 9 comprises a cylindrical part having a through bore whereby it can be slid onto and be keyed to the drive shaft of the electric motor.
me electric motor itself is fixed in hollow aerodynamic strut 10 by means of vertical foot plate 11. The drive shaft 7 extends through the leading edge of the strut 10 via a suitable seal 12.
me flow area between the strut 10 at its maximum depth and the upper and lower walls of the casin~ is preferably at least substantially equal to the cross-sectional area of the impeller 9.
Do~mstream of the strut 10 is a bank of secondary swirl nozzles 16 supplied with water via pipe 30 for additional wetting of dust particles and for cleaning down of that part of the unit. After the nozz]e,s 16 is a wire mesh guardl for catchin~ large lum~)~ of solids passin~ through the unit.
Follo~ing the ~uard 15 is a removable maiII filter ~ ~ 7~5 _ panel 17 for trapping the majority of du~t particles.
~ he filter 17 may be either of a fibrous type or knitted stainless steel. Access to the filter 7 is via water tight doors 31.
Water and dust collected in this part of the unit fall to the bottom of the casing and into sump 18 via slots 19.
Water carried over from the filter 17 is trapped in eliminator section 20 which is also removable, access being via a bolted panel 21. Water collected here falls to the bottom of the casing and drains into.the sump 17 via slots 22.
Relatively dust free air leaves the unit via the outlet 3.
The water slurry collected in the sump 18 can be drained away via valve 23 or can be transferred to a recirculation system via a pwnp ~4 (~ee Figure 4) which can also be operated by the electricmotor via a belt drive 25.
An alternative to the water spin~er 5 is a spray banX system 26, as sho~m in Figure 5, with finely atomising swirl nozzles at 27 supplied via pipe 28.
The dust removal unit of this invention has a number of advanta~es. It can be made small enough to be mounted on u.nderground minin~ machine~y, and so be capable of removin~ dust close to its source.
It ha.~ been found to be Ve~J efficient, because it ensures ~ood wettin~ of dusk l)articles, removin~ 9~,0 and more of respirable dust paItic].e, from the ai.r and , ~
1 ~7~5 it can move large volumes of air for its relative size.
It can be made as a self-contained unit with no water carry over and can be adapted for recirculation of used water.
It i9 relatively easy to maintain because the electric motor may be kept out of the contaminated air stream, access may be provided for inspection, cleaning and removal of filters, and provision of an auxiliary bank of water nozzles provides a means of cleaning the unit.
This invention concerns apparatus for removing dust from the air, particularly in underground w-orkings.
A problem of underground working, as in mining, is the presence of respirable dust produced, for example, as a result of high speed working of modern cutting machinery. This dust can be hazardous to health and safety. For example, dust reduces the degree of visibility of operating personnel if not adequately collected or removed.
The object of this invention is to provide a dust removal or collection unit, particularly but not exclusively applicable to underground workings, and which may be mounted directly on machinery, such as a coal cutting machine, or located in a suit-able unobtrusive position.
Accordingly this invention provides a dust removal or collection unit comprising, in a casing having an inlet and an outlet, means for drawing a dust-containing gaseous stream through the unit via said inlet and outlet, means for wetting the dust with water, and filter means for filtering out the wctted dust, said filter means including a fibrous, woven or knitted type filter in a toothed formation.
The unit of the invention may also have a water collection system wherein water and possibly dust removed from the air by the filter means is collected, preferably in a sump, and removed from the unit. This water may be recirculated for use in wetting dust-containing air.
~ ~ 7 ~ 5 ~ :i Preferably the casing is generally rectangular in cross-section and has its inlet and outlet in horizontal align-ment. The means for drawing air through the unit can be an axial fan of the type wherein the blade of said fan is mounted for rotation on the drive shaft of an electric motor which drive shaft extends through the leading edge of a hollow aerodynamic strut in which the motor ;s housed.
The wetting means may be a water spinner of the type described in British Patent Specification No. 1280239 or may be a water spray system.
In a preferred embodiment the axial fan and wetting means are housed in a first part of the casing, the motor for the fan is housed in a hollow aerodynamic strut in a second part of the casing and the filter means is housed in a third part of the casing.
The third part of the casing preferably contains in ~equence a filter for separating out large lumps of any solids passing through the unit, the main fibrous, woven or knitted material filter for removing the majority of dust and separating out water and a means for trapping d ~
. ~
1 1 7~5~5 remaining water carried over from the main filter. The main ~ilter may be removable and the third part of the casing may be provided with hatches or the like for access to the filter. ~he hatches are preferably water tight. The bottom of the casing may be provided with openin~s to allow the water to escape, possibly to a sump.
~ he unit of the invention may be constructed as a compact unit so that it can be mounted on machiner~
or placed in an unobstrusive location.
This invention will now be further described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows a general sectional elevation of a dust removal unit;
Figure 2 shows a sump for the unit of ~igure 1;
Figure 3 shows a partial side view of the unit of Figures 1 and 2;
Figure 4 shows an arrangement for recirculation of water; and Figure 5 shows an alternative wetting system to that shown in the unit of ~igure 1.
Referring to Figures 1 to ~, the numeral 1 generally denotes a ca~ing definin~ a flow path for a gaseous stream, such as air, the casing 1 having a ¢enerally circular inlet 2 and a generally rectangular outlet 3.
me outlet 3 can be fitted with a rectangular to circular conversion piece 4~
~,,, ~ , , , ~-`` 1 1 7~565 A water spinner 5 of the type described in British Patent Specification ~o. 12802~9 is mounted in the inlet 2 which provides an evenly distributed wall of finely atomised water to ensure thorough wetting of dust particles. The rotatable part of the water spinner 5, supplied with water via pipe 6, is mounted on drive shaft 7 of electric motor 8 as is an impeller 9. The impeller 9 is mounted concentrically in the inlet and is manufactured from high strength steel incorporating fixed pitch æ~odynamically shaped blades.
Hub 14 of the impeller 9 comprises a cylindrical part having a through bore whereby it can be slid onto and be keyed to the drive shaft of the electric motor.
me electric motor itself is fixed in hollow aerodynamic strut 10 by means of vertical foot plate 11. The drive shaft 7 extends through the leading edge of the strut 10 via a suitable seal 12.
me flow area between the strut 10 at its maximum depth and the upper and lower walls of the casin~ is preferably at least substantially equal to the cross-sectional area of the impeller 9.
Do~mstream of the strut 10 is a bank of secondary swirl nozzles 16 supplied with water via pipe 30 for additional wetting of dust particles and for cleaning down of that part of the unit. After the nozz]e,s 16 is a wire mesh guardl for catchin~ large lum~)~ of solids passin~ through the unit.
Follo~ing the ~uard 15 is a removable maiII filter ~ ~ 7~5 _ panel 17 for trapping the majority of du~t particles.
~ he filter 17 may be either of a fibrous type or knitted stainless steel. Access to the filter 7 is via water tight doors 31.
Water and dust collected in this part of the unit fall to the bottom of the casing and into sump 18 via slots 19.
Water carried over from the filter 17 is trapped in eliminator section 20 which is also removable, access being via a bolted panel 21. Water collected here falls to the bottom of the casing and drains into.the sump 17 via slots 22.
Relatively dust free air leaves the unit via the outlet 3.
The water slurry collected in the sump 18 can be drained away via valve 23 or can be transferred to a recirculation system via a pwnp ~4 (~ee Figure 4) which can also be operated by the electricmotor via a belt drive 25.
An alternative to the water spin~er 5 is a spray banX system 26, as sho~m in Figure 5, with finely atomising swirl nozzles at 27 supplied via pipe 28.
The dust removal unit of this invention has a number of advanta~es. It can be made small enough to be mounted on u.nderground minin~ machine~y, and so be capable of removin~ dust close to its source.
It ha.~ been found to be Ve~J efficient, because it ensures ~ood wettin~ of dusk l)articles, removin~ 9~,0 and more of respirable dust paItic].e, from the ai.r and , ~
1 ~7~5 it can move large volumes of air for its relative size.
It can be made as a self-contained unit with no water carry over and can be adapted for recirculation of used water.
It i9 relatively easy to maintain because the electric motor may be kept out of the contaminated air stream, access may be provided for inspection, cleaning and removal of filters, and provision of an auxiliary bank of water nozzles provides a means of cleaning the unit.
Claims (9)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A dust removal or collection unit comprising, in a casing having an inlet and an outlet, means for drawing a dust-containing gaseous stream through the unit via said inlet and outlet, means for wetting the dust with water, and filter means for filtering out the wetted dust, said filter means including a fibrous, woven or knitted type filter in a toothed formation.
2. A unit as claimed in claim 1 further comprising a water collection system, wherein water and possibly dust removed from the gaseous stream by the filter means is collected.
3. A unit as claimed in claim 2 having means for recirculating collected water to said wetting means.
4. A unit as claimed in claim 1 wherein the inlet and outlet are in horizontal alignment.
5. A unit as claimed in claim 1 wherein the means for drawing air through the unit is a fan.
6. A unit as claimed in claim S wherein the fan is an axial fan having its blade mounted for rotation on a motor drive shaft.
7. A unit as claimed in claim 6 wherein the motor is mounted in a hollow aerodynamic strut having a leading edge through which the motor shaft extends.
8. A unit as claimed in claim 7 wherein the motor is electri-cally operated.
9. A unit as claimed in claim 1 wherein the wetting means is a water spinner.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8038963A GB2088743B (en) | 1980-12-04 | 1980-12-04 | Water-spray dust removal apparatus |
| GB80/38963 | 1980-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1170565A true CA1170565A (en) | 1984-07-10 |
Family
ID=10517760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000369292A Expired CA1170565A (en) | 1980-12-04 | 1981-01-26 | Dust removal apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1170565A (en) |
| FR (1) | FR2495491A1 (en) |
| GB (1) | GB2088743B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1949700A (en) * | 2000-02-25 | 2001-08-30 | Joy Mm Delaware, Inc. | Dust collection system for a bolting machine |
| DE102011016289A1 (en) | 2011-04-07 | 2012-10-11 | Cft Gmbh Compact Filter Technic | Wet scrubbers with reduced energy requirement requiring compact demister |
| CN104368215B (en) * | 2014-08-28 | 2016-12-07 | 北京清新环境技术股份有限公司 | A kind of degree of depth takes off dirt demister |
| CN105536392A (en) * | 2016-01-07 | 2016-05-04 | 华电郑州机械设计研究院有限公司 | Attached-type spray dust suppression system for air-film totally-enclosed coal storage shed |
| CN105569722B (en) * | 2016-02-24 | 2018-04-06 | 吕志 | Portable mining face deduster |
| CN108499272A (en) * | 2018-04-04 | 2018-09-07 | 江苏建筑职业技术学院 | A kind of environmental project atomization big gun main body mechanism based on lift adjustment technology |
| CN111495073A (en) * | 2018-05-23 | 2020-08-07 | 石英权 | Water flow type air dust filter for passenger room of coal mine factory and use method |
| CN110469523A (en) * | 2019-07-12 | 2019-11-19 | 淮北矿业股份有限公司 | A kind of mine main fan energy-saving control device |
| CN114433566B (en) * | 2022-01-18 | 2023-06-16 | 山东华宇工学院 | Electric automatization industry dust collecting equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3036417A (en) * | 1959-03-06 | 1962-05-29 | Airfilpat Holdings Proprietary | Gas scrubbing and like operations |
| GB1280239A (en) * | 1970-04-25 | 1972-07-05 | Robertson Co H H | Improvements in or relating to spray or mist producing means |
| GB1457298A (en) * | 1974-06-18 | 1976-12-01 | Coal Industry Patents Ltd | Dust suppression equipment |
| DE2501537C3 (en) * | 1975-01-16 | 1979-03-22 | Ferroplast Gesellschaft Fuer Metall- Und Kunststofferzeugnisse Mbh, 4320 Hattingen | Wet dedusting system, especially for underground operation |
-
1980
- 1980-12-04 GB GB8038963A patent/GB2088743B/en not_active Expired
-
1981
- 1981-01-26 CA CA000369292A patent/CA1170565A/en not_active Expired
- 1981-01-28 FR FR8101585A patent/FR2495491A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2088743A (en) | 1982-06-16 |
| FR2495491A1 (en) | 1982-06-11 |
| GB2088743B (en) | 1985-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20010710 |