GB2154466A - Scrubbing gas stream - Google Patents

Scrubbing gas stream Download PDF

Info

Publication number
GB2154466A
GB2154466A GB08401197A GB8401197A GB2154466A GB 2154466 A GB2154466 A GB 2154466A GB 08401197 A GB08401197 A GB 08401197A GB 8401197 A GB8401197 A GB 8401197A GB 2154466 A GB2154466 A GB 2154466A
Authority
GB
United Kingdom
Prior art keywords
gaseous stream
liquid
water
housing
scrubbing
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.)
Withdrawn
Application number
GB08401197A
Other versions
GB8401197D0 (en
Inventor
Fung Chin Pang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB08401197A priority Critical patent/GB2154466A/en
Publication of GB8401197D0 publication Critical patent/GB8401197D0/en
Publication of GB2154466A publication Critical patent/GB2154466A/en
Withdrawn legal-status Critical Current

Links

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
    • B01D45/10—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators which are wetted
    • 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
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
    • B01D47/028—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by directing the gas through a wetted wire mesh or a perforated plate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

An apparatus for scrubbing a gaseous stream, such as hot dusty fumes produced by a stove, furnace or the like, comprises a housing (1) having an inlet (2) for receiving fumes from a first chimney (3) and an outlet pipe (4) for discharging scrubbed fumes into the atmosphere via a second chimney (5). Two staggered arrays of vertical square-section iron tubes (7) are disposed within the housing (1) and water is pumped continuously to the top of each tube (7) whence it is allowed to flow down the outer surface of the tube (7). Fumes entering the housing (1) are forced to follow a circuitous path through the arrays of tubes (7) and dust and the like from the fumes is entrained by the downwardly flowing water. Means are provided for maintaining the level of water in the housing (1) and for draining soiled water therefrom. The water may be recirculated. <IMAGE>

Description

SPECIFICATION A method of, and an apparatus for, scrubbing a gaseous stream This invention relates to a method of, and an apparatus for, scrubbing a gaseous stream, such as the hot dust bearing fumes produced by a stove, furnace or the like, to remove therefrom dust and other particulate material or the like.
The hot dust bearing fumes which are produced by factory furnaces burning fuels such as industrial diesel and by stoves and similar appliances utilized in restaurants constitute a serious problem of air pollution. Accordingly, it has been proposed to provide a scrubbing device between the burning zone and the point at which the fumes are discharged into the atmosphere, for removing pollutants such as dust and other particulate material from the fumes. One such previously proposed scrubbing device operates using static electricity. However, such devices are relatively complex and costly. Another previously proposed device comprises means for scattering particulate material from its point of entry into the atmosphere, which does not, however, prevent air pollution. It has also been proposed to scrub fumes using a finely divided water spray before discharging them into the atmosphere.However, this method has the disadvantage that flashing tends to occur as the water spray comes into contact with the moving gaseous stream, that is to say, the water tends to vaporise.
It is an object of the present invention to enable the provision of a method of, and an apparatus for, scrubbing a gaseous stream, whereby the above disadvantages may be obviated or at least mitigated.
According to a first aspect of the present invention there is provided apparatus for scrubbing a gaseous stream, which apparatus comprises means for providing å continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby, in use, matter carried by the gaseous stream is entrained in the liquid.
According to a second aspect of the present invention there is provided a method of scrubbing a gaseous stream, which method comprises providing a continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby matter carried by the gaseous stream is entrained in the liquid.
Thus the present invention enables the provision of an effective and economical scrubbing device in which dust and other particulate material are removed from hot dust bearing fumes by being entrained in a moving "membrane" of water. Such a membrane may be produced by allowing water to flow downwards over the surface of an obstacle.
Preferably, a plurality of such obstacles, comprising, for example, vertical iron bars, are disposed in a staggered array so that the hot dust bearing fumes are forced to follow a circuitous path through the array.
For a better understanding of the present invention, and to show how the same may be put into effect, reference will now be made, by way of example, to the accompanying drawings, in which:~ Figure 1 is a front elevational view of an apparatus in accordance with the invention Figure 2 is a side elevational view of the apparatus of Figure 1, viewed from the left hand side, Figure 3 is a top plan view of the apparatus of Figures 1 and 2, Figure 4 is a cross-sectional view taken on the line lV-lV of Figure 1, and Figure 5 is a cross-sectional view taken on the line V-V of Figure 3.
Referring now to the drawings, the apparatus comprises a housing 1 of 1.5 mm thick stainless steel having an inlet 2 for receiving hot dust bearing fumes from a first chimney 3 and an outlet pipe 4 for discharging the scrubbed fumes into the atmosphere via a second chimney 5. A 40 mm thick layer 6 of insulating material is provided on the housing 1, the outlet pipe 4 and the chimneys 3, 5.
As can most clearly be seen in Figures 4 and 5, two staggered arrays of square section vertical iron tubes 7 are disposed in the housing 1 in such a way that fumes passing through the housing 1 must follow a circuitous path as illustrated by the curved arrows.
In use, water is introduced into the housing 1 from a water supply 8 and the level of the water in the housing 1 is maintained at a desired value by means of a ballcock, as can most clearly be seen in Figure 4.
If the water level drops below the desired value, the float 9 of the ballcock falls sufficiently far to open a valve and thereby allow water to enter the housing 1 from the water supply 8. As can be seen in Figure 4, water is continuously pumped from the bottom of the housing 1 to the top of each iron tube 7 by means of a 5 horse power (3.7 kw) pump 10 via valves 11, 12 and 50 mm diameter pipes 13, 14. The top end of each tube 7 is open, so that the water flows down over the outer surface of the tube, entraining particles from the hot dust bearing fumes as they trace a circuitous path through the arrays of tubes 7. The particles are thus washed down into the bottom of the housing 1, which is provided with a drain 15 for removing soiled water. In order to obtain the best results, the water is pumped only at a moderate speed so as to avoid the formation of jets of water and thus prevent flashing and to avoid allowing water to enter the first chimney 3. The water in the housing 1 can be allowed to circulate for some time, for example, for a few days, before being removed via the drain 15 and replaced with clean water from the water supply 8.
The housing 1 is provided with a door 16 to facilitate cleaning, and angled steel supports 17.
Water is preferred as the entraining liquid because of its low cost and comparative safety, but it is envisaged that other liquids could be utilised. It is also envisaged that a number of the apparatus described could be used to serve a single chimney 3, if necessary.
Claims
1. Apparatus for scrubbing a gaseous stream,
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A method of, and an apparatus for, scrubbing a gaseous stream This invention relates to a method of, and an apparatus for, scrubbing a gaseous stream, such as the hot dust bearing fumes produced by a stove, furnace or the like, to remove therefrom dust and other particulate material or the like. The hot dust bearing fumes which are produced by factory furnaces burning fuels such as industrial diesel and by stoves and similar appliances utilized in restaurants constitute a serious problem of air pollution. Accordingly, it has been proposed to provide a scrubbing device between the burning zone and the point at which the fumes are discharged into the atmosphere, for removing pollutants such as dust and other particulate material from the fumes. One such previously proposed scrubbing device operates using static electricity. However, such devices are relatively complex and costly. Another previously proposed device comprises means for scattering particulate material from its point of entry into the atmosphere, which does not, however, prevent air pollution. It has also been proposed to scrub fumes using a finely divided water spray before discharging them into the atmosphere.However, this method has the disadvantage that flashing tends to occur as the water spray comes into contact with the moving gaseous stream, that is to say, the water tends to vaporise. It is an object of the present invention to enable the provision of a method of, and an apparatus for, scrubbing a gaseous stream, whereby the above disadvantages may be obviated or at least mitigated. According to a first aspect of the present invention there is provided apparatus for scrubbing a gaseous stream, which apparatus comprises means for providing å continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby, in use, matter carried by the gaseous stream is entrained in the liquid. According to a second aspect of the present invention there is provided a method of scrubbing a gaseous stream, which method comprises providing a continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby matter carried by the gaseous stream is entrained in the liquid. Thus the present invention enables the provision of an effective and economical scrubbing device in which dust and other particulate material are removed from hot dust bearing fumes by being entrained in a moving "membrane" of water. Such a membrane may be produced by allowing water to flow downwards over the surface of an obstacle. Preferably, a plurality of such obstacles, comprising, for example, vertical iron bars, are disposed in a staggered array so that the hot dust bearing fumes are forced to follow a circuitous path through the array. For a better understanding of the present invention, and to show how the same may be put into effect, reference will now be made, by way of example, to the accompanying drawings, in which:~ Figure 1 is a front elevational view of an apparatus in accordance with the invention Figure 2 is a side elevational view of the apparatus of Figure 1, viewed from the left hand side, Figure 3 is a top plan view of the apparatus of Figures 1 and 2, Figure 4 is a cross-sectional view taken on the line lV-lV of Figure 1, and Figure 5 is a cross-sectional view taken on the line V-V of Figure 3. Referring now to the drawings, the apparatus comprises a housing 1 of 1.5 mm thick stainless steel having an inlet 2 for receiving hot dust bearing fumes from a first chimney 3 and an outlet pipe 4 for discharging the scrubbed fumes into the atmosphere via a second chimney 5. A 40 mm thick layer 6 of insulating material is provided on the housing 1, the outlet pipe 4 and the chimneys 3, 5. As can most clearly be seen in Figures 4 and 5, two staggered arrays of square section vertical iron tubes 7 are disposed in the housing 1 in such a way that fumes passing through the housing 1 must follow a circuitous path as illustrated by the curved arrows. In use, water is introduced into the housing 1 from a water supply 8 and the level of the water in the housing 1 is maintained at a desired value by means of a ballcock, as can most clearly be seen in Figure 4. If the water level drops below the desired value, the float 9 of the ballcock falls sufficiently far to open a valve and thereby allow water to enter the housing 1 from the water supply 8. As can be seen in Figure 4, water is continuously pumped from the bottom of the housing 1 to the top of each iron tube 7 by means of a 5 horse power (3.7 kw) pump 10 via valves 11, 12 and 50 mm diameter pipes 13, 14. The top end of each tube 7 is open, so that the water flows down over the outer surface of the tube, entraining particles from the hot dust bearing fumes as they trace a circuitous path through the arrays of tubes 7. The particles are thus washed down into the bottom of the housing 1, which is provided with a drain 15 for removing soiled water.In order to obtain the best results, the water is pumped only at a moderate speed so as to avoid the formation of jets of water and thus prevent flashing and to avoid allowing water to enter the first chimney 3. The water in the housing 1 can be allowed to circulate for some time, for example, for a few days, before being removed via the drain 15 and replaced with clean water from the water supply 8. The housing 1 is provided with a door 16 to facilitate cleaning, and angled steel supports 17. Water is preferred as the entraining liquid because of its low cost and comparative safety, but it is envisaged that other liquids could be utilised. It is also envisaged that a number of the apparatus described could be used to serve a single chimney 3, if necessary. Claims
1. Apparatus for scrubbing a gaseous stream, which apparatus comprises means for providing a continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby, in use, matter carried by the gaseous stream is entrained in the liquid.
2. Apparatus according to Claim 1, which comprises means for allowing the liquid to flow downwards over the surface of one or more obstacles.
3. Apparatus according to Claim 2, wherein the obstacles are disposed in an array defining a circuitous path therethrough for the gaseous stream.
4. Apparatus according to Claim 2 or 3, wherein the or each obstacle comprises a vertically extending tube having an open upper end, further comprising means for pumping liquid through the tube to the said upper end thereof.
5. Apparatus according to any one of the preceding claims, which comprises means for circulating the liquid.
6. Apparatus according to Claims 4 and 5, which comprises means for retaining liquid which has flowed downwards over the surface of the or each tube, the pumping means being in communication with the retaining means.
7. A method of scrubbing a gaseous stream, which method comprises providing a continuous contact surface between the gaseous stream and a liquid which is moving relative thereto, whereby matter carried by the gaseous stream is entrained in the liquid.
8. A method according to Claim 7, which comprises allowing the liquid to flow downwards over the surface of oen or more obstacles.
9. A method according to Claim 8, wherein the obstacles are disposed in an array defining a circuitous path therethrough for the gaseous stream.
10. A method of scrubbing a gaseous stream, substantially as hereinbefore described with reference to the accompanying drawings.
10. A method according to Claim 8 or 9, wherein the or each obstacle comprises a vertically extending tube having an open upper end, further comprising pumping the liquid through the tube to the said upper end thereof.
11. A method according to any one of Claims 7 to 10, which comprises circulating the liquid.
12. A method according to Claims 10 and 11, which comprises retaining liquid which has flowed downwards over the surface of the or each tube and pumping the liquid which has been retained.
13. An apparatus for scrubbing a gaseous stream, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
14. A method of scrubbing a gaseous stream, substantially as hereinbefore described with reference to the accompanying drawings.
15. Any novel feature or combination of features described herein.
Claims 1-10 above have been deleted or textually amended.
New or textually amended claims have been filed as follows:~ Claims
1. Apparatus for scrubbing a gaseous stream, which apparatus comprises a housing having a gas inlet and a gas outlet, means for maintaining the level of a liquid in the housing at a desired value, one or more obstacles disposed in the housing, and means for continuously circulating the liquid so as to allow the same repeatedly to flow downwards over the surface of the one or more obstacles, whereby a continuous contact surface is provided between the gaseous stream and the liquid so that, in use, matter carried by the gaseous stream is entrained in the liquid.
2. Apparatus according to Claim 1, wherein the obstacles are disposed in an array defining a circuitous path therethrough for the gaseous stream.
3. Apparatus according to Claim 1 or 2, wherein the or each obstacle comprises a vertically extending tube having an open upper end, the circulating means comprising means for pumping liquid through the tube to the said upper end thereof.
4. Apparatus according to Claim 1, 2 or 3, wherein the means for maintaining the level of a liquid in the housing at a desired value comprises a ballcock.
5. A method of scrubbing a gaseous stream, which method comprises allowing the gaseous stream to pass through a housing having one or more obstacles disposed therein, maintaining the level of a liquid in the housing at a desired value, and continuously circulating the liquid so as to allow the same repeatedly to flow downwards over the surface of the one or more obstacles, whereby a continuous contact surface is provided between the gaseous stream and the liquid so that matter carried by the gaseous stream is entrained in the liquid.
6. A method according to Claim 5, wherein the obstacles are disposed in an array defining a circuitous path therethrough for the gaseous stream.
7. A method according to Claim 5 or 6, wherein the or each obstacle comprises a vertically extending tube having an open upper end, comprising pumping the liquid through the tube to the said upper end thereof.
8. A method according to Claim 5, 6 or 7, wherein the level of the liquid in the housing is maintained at the desired value by means of a ballcock.
9. An apparatus for scrubbing a gaseous stream, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
GB08401197A 1984-01-17 1984-01-17 Scrubbing gas stream Withdrawn GB2154466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08401197A GB2154466A (en) 1984-01-17 1984-01-17 Scrubbing gas stream

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08401197A GB2154466A (en) 1984-01-17 1984-01-17 Scrubbing gas stream

Publications (2)

Publication Number Publication Date
GB8401197D0 GB8401197D0 (en) 1984-02-22
GB2154466A true GB2154466A (en) 1985-09-11

Family

ID=10555109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08401197A Withdrawn GB2154466A (en) 1984-01-17 1984-01-17 Scrubbing gas stream

Country Status (1)

Country Link
GB (1) GB2154466A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006026818A1 (en) * 2004-09-10 2006-03-16 Malcolm Coleman Odour reduction apparatus
WO2011054878A1 (en) * 2009-11-05 2011-05-12 Omega Thermo Products Llc Panel and use of such a panel in a device for cleaning gases by removing impurities therefrom
EP2638943A3 (en) * 2009-11-12 2013-12-25 Novomatic AG Air cleaner for removing air pollutants from an air stream

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB277281A (en) * 1926-09-13 1927-12-08 Hanrez Sa J Atel Apparatus for the removal of dust from gases
GB823542A (en) * 1956-01-13 1959-11-11 Maurice Wyatt Flood Page Improvements relating to methods and apparatus for extracting dust and like fragments of burnt or partially burnt solid material from combustion gases
GB851672A (en) * 1959-04-10 1960-10-19 Maurice Wyatt Flood Page Dust extractor
GB1096444A (en) * 1965-01-11 1967-12-29 Detrick M H Co Apparatus for removing solids from hot gas
GB1334776A (en) * 1970-06-03 1973-10-24 Detrick M H Co Scrubbing apparatus for polluted gases

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB277281A (en) * 1926-09-13 1927-12-08 Hanrez Sa J Atel Apparatus for the removal of dust from gases
GB823542A (en) * 1956-01-13 1959-11-11 Maurice Wyatt Flood Page Improvements relating to methods and apparatus for extracting dust and like fragments of burnt or partially burnt solid material from combustion gases
GB851672A (en) * 1959-04-10 1960-10-19 Maurice Wyatt Flood Page Dust extractor
GB1096444A (en) * 1965-01-11 1967-12-29 Detrick M H Co Apparatus for removing solids from hot gas
GB1334776A (en) * 1970-06-03 1973-10-24 Detrick M H Co Scrubbing apparatus for polluted gases

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006026818A1 (en) * 2004-09-10 2006-03-16 Malcolm Coleman Odour reduction apparatus
WO2011054878A1 (en) * 2009-11-05 2011-05-12 Omega Thermo Products Llc Panel and use of such a panel in a device for cleaning gases by removing impurities therefrom
US8303686B2 (en) 2009-11-05 2012-11-06 Omega Thermo Products Llc Panel and use of such a panel in a device for cleaning gases by removing impurities therefrom
EP2638943A3 (en) * 2009-11-12 2013-12-25 Novomatic AG Air cleaner for removing air pollutants from an air stream
EP2327466B1 (en) * 2009-11-12 2014-08-06 Novomatic AG Air cleaner for removing air pollutants from an air stream

Also Published As

Publication number Publication date
GB8401197D0 (en) 1984-02-22

Similar Documents

Publication Publication Date Title
US3731462A (en) Air purification systems
US4822385A (en) Exhaust cleansing apparatus
US5298043A (en) Filter system for smoke or polluted air
US7252807B2 (en) Apparatus and method for cleaning, neutralizing and recirculating exhaust air in a confined environment
US1866193A (en) Purification of furnace or other gases
CN1030177A (en) Cleaning system
EP1448291A2 (en) Method and apparatus for scrubbing gases, using mixing vanes
US6966942B2 (en) Process for purifying exhaust gases by employing a bubble generator
CN201120236Y (en) Hydrosphere mixing, separating multilevel air purification device
US3224170A (en) Gas purification apparatus
US3686833A (en) Self-cleaning air scrubber
GB2154466A (en) Scrubbing gas stream
US4099938A (en) Mist eliminator cleaning device
US4132537A (en) Down draft scrubber apparatus
US4219342A (en) Pollution control system
CN1418719A (en) Apparatus for purifying cooking-fume
US2818135A (en) Dust laden air separator
US4165973A (en) Dust collector and air scrubber
US4708722A (en) Air washer and heat exchanger
US2830673A (en) Smoke-arresting apparatus
KR200148745Y1 (en) Degasing washing machine
CA2104362A1 (en) Smoke/gas exhausting and purifying device
CN109173683A (en) Close the general clarifier of variant exhaust gas
CN220920295U (en) Flue gas dynamic wave cleaning device
KR100220857B1 (en) Single and multi-stage air control system

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)