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WO1986004527A1 - Dispositif et procede de broyage pneumatique - Google Patents

Dispositif et procede de broyage pneumatique Download PDF

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Publication number
WO1986004527A1
WO1986004527A1 PCT/US1986/000122 US8600122W WO8604527A1 WO 1986004527 A1 WO1986004527 A1 WO 1986004527A1 US 8600122 W US8600122 W US 8600122W WO 8604527 A1 WO8604527 A1 WO 8604527A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
housing
comminutor
inlet
sleeve
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.)
Ceased
Application number
PCT/US1986/000122
Other languages
English (en)
Inventor
Allen C. Wiley
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.)
CP COAL MILLS Inc
Original Assignee
CP COAL MILLS Inc
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 CP COAL MILLS Inc filed Critical CP COAL MILLS Inc
Publication of WO1986004527A1 publication Critical patent/WO1986004527A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • B02C19/005—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) the materials to be pulverised being disintegrated by collision of, or friction between, the material particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/001—Pumps adapted for conveying materials or for handling specific elastic fluids
    • F04D23/003—Pumps adapted for conveying materials or for handling specific elastic fluids of radial-flow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel

Definitions

  • This invention relates to a means and method of comminuting materials/ in particular/ a means and method of pneumatically comminuting various materials.
  • Micronized coal burns more efficiently than lump coal.
  • Micronized coal is lump coal which is disintegrated to micron sized particles.
  • Micronized coal also provides for easier handling/ more efficient/ complete and controllable combustion/ and an opportunity to reduce particulate emissions.
  • a micronized coal particle has a larger surface per unit volume/ thereby increasing the burning rate.
  • Micronized coal burns much like a No. 2 oil/ suggesting that retrofitting can be accomplished by replacement of the oil or gas burner with a coal burner/ and derating of a furnace is unnecessary. Further develop- ment of techniques for combustion systems using micronized coal and applications of these techniques to industrial size furnaces is in process.
  • Micronized coal of the size between 5 micrometers (um) and 30 um is more advantageous than the particles produced by conventional pulverizers where particle sizes range from 50 to 150 um.
  • the centrifugal comminutor of this invention will efficiently and economically produce coal particles between 5 um and 30 um in diameter.
  • the surface area per unit weight has become a standard for characterizing cement quality. Acceptable fineness is around 3/200 to 4,200 cm 2 per gram (cm2/gm) of cement.
  • This measurement/ known as Blaine Surface Measurement/ is made by measuring the pressure drop which results from the flow of air through a standard packed bed of cement.
  • comminution is utilized on a signifi- cant scale for many other commodities including/ but not limited to the following: aluminum/ arsenic/ asbestos/ barite, boron/ calcium/ ceramics/ chromium/ clays/ copper/ diatomite/ feldspar / fluorspar, golds/ grain/ gypsum/ iron ore/ lead/ lithium/ magnesium/ manganese/ mercury/ mica, molybdenum, nickel/ perlite/ phosphate/ potassium/ pumice, rare earth/ sand and gravel/ salts/ silicon/ silver/ a stone/ chalk/ titanium/ tungsten/ uranium/ vermiculite/ and zinc. It is estimated that the energy used for comminution of these materials approaches 30 billion kilowatt hours per year.
  • the present invention represents a significant improvement over the above mentioned conventional comminutors as it utilizes pneumatics and particle-to- particle attrition for both transport of the material and comminution of the material/ respectively.
  • the present invention provides a means and method of significantly economizing energy use and capital costs associated with comminution technology, while at the same time providing accurate and uniform-in-size • comminution/ with minimal metal loss to the comminuting device.
  • Improvements in the structure include inter alia modification of the fan structure and its association with the fan housing/ horizontal placement and rotation of the fan/ variations in the dimensions and relation- ship of the cone leading into the fan housing with fan size and speed; and tailoring of the structure and method to enhance performance with minerals and other product .
  • the present invention includes a fan means rotatably connected to a power source and enclosed within a fan housing.
  • the axle of the fan extends upwardly through the top surface of the housing, whereas an opening concentrically aligned with the fan axis exists on the lower surface of the housing.
  • An outlet opening is provided along the perimeter of the fan housing.
  • the lowermost portion of the fan has a ring member including a flange means which is mateable in close proximity with the flange means of a journaling means mounted surrounding the inlet opening to the fan housing.
  • the ring member and journaling means combina ⁇ tion assures a sealed and efficient air flow through the device by creating an air lock between the inlet/ the fan housing and the outlet.
  • the method of the present invention utilizes various structural relationships to provide an improved method of comminution within the device.
  • the fan speed is variably adjustable in accordance with the throughput and is directly related to particle size output.
  • Fan size and blade shape is related to the input cone size and shape to achieve a desired air flow and particle size.
  • the step of providing an air lock by way of the ring and journal means improves the air flow through the device, to achieve better particle- to-particle attrition.
  • the results of the improved structure and method of the present invention provide unifor ity-in-size of comminuted particles which is accurately controllable, while at the same time minimizing or eliminating any metal loss from the blades of the fan.
  • the means and method of the present invention allow it to be effectively operative for many different types of ma'terials with the same results, from very hard minerals such as granite, iron ore, chromium and mica, to soft materials such as grain, clay/ and the like.
  • the present invention also presents the advantages of significant economy in energy consumption per product comminuted/ and significant savings in capital equipment costs, for the comminutor itself by elimi ⁇ nating the need for most ancillary equipment. It can be operatively implemented into micronized coal combustion systems, cement grinding operations, and a multitude of other applications. It is therefore a primary object of the invention to improve over the problems and upon the deficiencies in the art of comminutors.
  • a further object of the invention is to provide a means and method for comminuting materials which does so efficiently and effectively.
  • Another object of the invention is to provide a blade means and method of comminuting materials which produces effective suction or vacuum and creates an effective comminuting environment which combines the effects of reduced environment pressure and centrifugal force in combination with a pulsating turbulence zone just in front of the fan blade tips.
  • a further object of the invention is to provide a means and method of comminuting materials which provides an effective air lock throughout the device.
  • a further object of the invention is to provide a means and method of comminuting material which is variable in adjustment of air flow speed which as a result allows selection of particle size output.
  • Another object of the invention is to provide a means and method of comminuting materials which can be used for many different applications, from hard materials to soft materials.
  • Figure 1 is a partial elevational view/ partial perspective view ; and a partial schematic view of the invention.
  • Figure 2 is an elevational view with the fan r housing and conduits in section.
  • Figure 3 is a partial sectional view of the fan.
  • Figure 4 is a partial elevational view and partial sectional view of the fan.
  • Figure 5 is a bottom view of the fan with a broken away portion.
  • Figure 6 is a partial sectional top view of a fan blade of the invention taken along lines 6-6 of Figure 4.
  • Figure 7 is a partial sectional view of a fan blade tip of the invention taken along lines 7-7 of Figure 4.
  • Figure 1 depicts the comminutor 10 schematically in association with ancillary supporting components for micronizing coal and introducing it into a coal furnace 12.
  • the basic comminutor 10 consists of a fan 14 (see Figure 2) contained within a housing 16.
  • Fan 14 is rotatable within housing 16 by operative connection of axle 18 via belts 20 to a motor 22.
  • Belts 20 enhance safety of the invention by providing slippage in the event of any jamming of fan 14.
  • An input conduit 24 is comprised of an annular section 26 attached to the bottom of said housing surrounding an inlet opening 28 (see Figure 2 ) , a conical section 30 and tubular section 32 having a side opening 34 therein.
  • Side tube 36 is attached to tubular section 32 around side opening 34 and in turn/ at its outer end/ is put into communication with hopper 38 having a feeder gate 40.
  • Fan housing 16 has an outlet opening 42 along the -perimetric edge of housing 16 to which is connected an outlet conduit 44.
  • a partial vacuum is produced in input conduit 24.
  • the partial vacuum in- input conduit 24 causes most of the material to be suctioned into conical section 30 where/ because of the shape of conical section 30, the material is caused to assume a centrifugal/ upward spiraling path.
  • the centrifugal motion is at a maximum in annular section 26 (the rotational impact zone)/ at a level nearest fan 14/ the greatest amount of attrition occurs at that location/ i .e . , just prior to fan entry.
  • a twincone classifier 54 is connected to outlet conduit 44 and serves to reject non-uniform size coal particles or otherwise unacceptable particles and rechannels them through air lock 56 into hopper 38.
  • the pressure from fan 14 provides the force to move the micronized coal to classifier 54 and then to damper 58/ which controls the amount of micronized coal going into furnace or kiln 12.
  • coal rate controller 60 which is electronically connected to damper actuator 62 on the one hand/ and a semi-conductor controlled rectifier
  • Coal rate controller 60 can be a computerized mechanism having sensors of rates of flow which can compare said rates to predetermined values for furnace 12 output/ and/ of course/ can consist of manual controls. Such coal rate controllers are known in the art.
  • Fan 14 is removably secured to axle 18 within housing 16.
  • an effective air lock is accomplished throughout the system, and particularly between input conduit 24, housing 16, and output conduit 44, by a ring means 66 secured annularly to the bottom of fan 14.
  • Ring means 66 has a flange means consisting of annular rings 70 (see Figure 4) which are mateable with flange means or rings 74 (see Figure 4) of a journal means 76 which is secured around the inlet opening 28 on the bottom surface of housing 16. This arrangement forces all materials to pass between blades or vanes 78 of fan 14 and in conjunction with the air pressure relationships within the comminutor creates an effective air lock throughout the system.
  • the ring and journal means also provides for retention of the bottom portion of the fan for stability and accurate positioning although a gap of approximately .30 cm exists therebetween. It is to be understood that the air lock gets stronger as fan speed increases because of a corresponding increase in pressure differential above and below fan 14.
  • Axle 18 is itself journaled within two bearings/ the first bearing 80 being secured to the top surface of housing 16, the second bearing 82 extending from supports 84 which in turn is attached to housing 16 * .
  • a pulley 86 is rigidly secured to axle 18 between first and second bearings 80 and 82 and is frictionally rotated by belts 20 which are attached to drive wheel 88 of electric motor 22 which is connected to an electrical power source (not shown) by electrical conduit 90.
  • journal means 76 is comprised of two semi-circular parts, both semi ⁇ circular parts being attached to housing 16 by bolts 92 (three bolts per semicircular part).
  • the two piece construction of journal means 76 allows journal means 76 to be removed from mating engagement with ring means 66 of fan 14 to allow removal and maintenance to fan 14.
  • the attachment of input conduit 24 to journal means 76, and tubular section 32 to conical section 30 of input conduit 24, and hopper 38 to side tube 36 can be accomplished by methods known within the art, and usually can be accomplished by some sort of bolt means or other removable fastening means. It is to be understood that journal means 76 could also be comprised of three or more parts.
  • Figure 3 illustrates the shape and association of the preferred fan blades or vanes 78.
  • the center of the fan is comprised of a sleeve 94 having a key slot 96 extending its longitudinal length for matable matching of a key 98 (not shown) on axle 18.
  • Blades 78 are attached to sleeve 94 at their innermost ends 100, and are attached at their upper edges 102 to plate 104.
  • ring means 66 is secured in the L-shaped cut-out portions of the lower parts of blades 78.
  • Ring means 66 consists basically of a ring shaped member 108 secured to the vertical edge 110 of L-shaped cutouts 106 of blades 78, and an annular ring 112 attached to ring shaped member 108 and the horizontal edge of L-shaped cutouts 106 of blades 78 extending to the lowermost edge 116 of blades 78.
  • a middle ring 118 and a bottom ring 120 comprise the ring means 66 described above.
  • journal means 76 includes a top ring 122 and a middle ring 124 which matingly position between middle ring 118 and bottom ring 120 of ring means 66 to provide a journaling and retententive relationship for ring means 66 to housing 16.
  • Journal means 76 is secured to a supporting piece 126 which is rigidly attached to housing 16 by bolts 92, and as discussed above, journal means 76 is split into two semi-circular parts (not shown) so that by removing bolts 92, journal means 76 can be split apart, thus allowing access to and maintenance capabilities to fan 14.
  • the farthest width of fan 14 does not extend as far as supporting ⁇ ring 126, thus allowing removal of fan 14 through inlet opening 28.
  • annular section 26 of input conduit 24 can be removably attached to supporting piece 126, or can be rigidly secured thereto. The methods and manner of securement of the various components can be as is sufficient and as is known in the art.
  • FIGS 3 and 4 illustrate that the lower surface 128 of plate 104 is of increasing thickness from its perimetric edge to its point of attachment with sleeve 94. Therefore, the upper edges 102 of blades 78 are correspondingly sloped e.g., 10° downward. This solid back with an inward taper improves air flow.
  • plate 104 and ring means 66 essentially sandwich and provide upper and lower boundaries and stress bearing members for fan 14, whereas blades 78 extend essentially between plate 104 and the lower edge of ring means 66.
  • the major portion 'of blades 78/ as can be seen in Figure 4, consists of the portion extending from the points of attachment with sleeve 94 outward to outer end 130.
  • upper blade portion 132 An addi ⁇ tional part of blade 78 extends downwardly from this upper blade portion 132 and has a lowermost edge 116 and an outermost edge (vertical edge 110) attached to annular ring 112 of ring means 66.
  • lower blade portion 134 For reference, this will be referred to as lower blade portion 134.
  • lower blade portion 134 consists of curved edge 136 which creates a substantial open area 138 below sleeve 94 in the interior of housing 16, directly adjacent to and above inlet opening 28.
  • the lowermost edges 116 of lower blade portions 134 of blades 78 extend inwardly from journal means 76 in inlet opening 28.
  • a hard, durable material such as tungsten carbide piece 140 is secured behind and along lowermost edge 116 and curved edges 136 to create a thickened hammer edge. These carbide pieces 140 are easily replaceable/ and enhance the grinding action.
  • Figures 3 and 4 also illustrate the concaval shape of the forward faces of blades 78. Additional features characterize blades 78.
  • the very outer portion of upper blade portion 132 of each of blades 78 is bent slightly backwards from the direction of travel. Whereas the invention operates adequately with the outer portion of upper blade portion 132 extending in alignment with the entire upper blade portion 132/ it has been found that abrasion can carve a groove to be formed in the middle of the blades 78 and that bending back these outer portions prevents blade abrasion from the comminuted particles which are being conducted and pushed through fan housing 16 and out of outlet opening 42.
  • Secondly/ ring means 66 includes a rounded shoulder 67 which mateably is positioned against rounded edge 69 of blades 78 formed between horizontal edge 114 and vertical edge 110.
  • Rounded shoulder 69 prevents particle build-up between blades 78 and enhances air flow throughout comminutor 10.
  • blades 78 In addition to the structure of blades 78, the operation of the invention is dependent upon other. factors. The number and spacing of blades 78 and the speed at which fan 14 is rotated all are critical factors in the operation of comminutor 10. In the preferred embodiment, eleven blades 78 are utilized. The spacing of blades 78 is controlled by the following ratio: Blade gap area; total inlet area/ where blade gap area and total inlet area are both measured in plane 146 defined by lowermost edges 116 of lower blade portions 134 of blades 78/ or equivalently/ defined by the lowermost surface of journal means 76 or ring means 66. Blade gap area is thus the area between each blade 78 shown by the dotted line 148 in Figure 5. It is preferred that the ratio between 1:15 and 1:25 and in particular/ between 1:18 and 1:23.
  • fan 14 is variable/ but for a desired particle size can be determined by utilizing fan laws such as are known in* the art.
  • Fan 14 is generally rotated at a tip. speed of from 61 meters to 90 meters/ second.
  • Motor 22 generally must produce a rotation of axle 18 of from 7,000 to 10,000 r.p.m.
  • fan 14 was 30.48 cm in diameter, had 11 blades each being 6.99 cm tall/ and the fan was rotated at 7250 rpms resulting in the lowermost edges 116 traveling at 82 meters per second/ the air volume of fan 14 would be approximately 1000 acfm (average cubic feet/minute) .
  • FIG. 5 shows clearly how the blades 78 are attached to sleeve 94 at a location along sleeve 94 which is forward from an imaginery line drawn between the center of sleeve 94 and the outer edge 130 of blade 78. Therefore/ outer edge 130 trails inner end 100 for each blade 78.
  • Figure 5 also shows how upper blade portions 130 of blades 78 extend past the opening defined by journal means 76.
  • the material is then comminuted to a reduced size between 0 and .6 cm depending on the pressure being produced (which is negative in front of the fan) .
  • the material will be light enough that it rises to the fan where they are then sent out of outlet opening 42 into classifier 54, wherein the material is sorted, either to be reintroduced into the comminuter or channeled directly into the kiln 12.
  • blades 78 extend downwardly to just above the bottom of journal means 76.
  • the portion of annular section 26 of input conduit 24 comprises what shall be known as the rotational impact area.
  • fan housing 116 could include a ceramic lining 41 or blades' 78 of fan 14 could be coated with a material such as, for example/ ceramic tiles, a tungsten carbide sheet, or a rubber lining to reduce wear.
  • a window could be added to input conduit 24 for viewing of the comminution and access to the interior of input s conduit 24.
  • dynamics of the rota ⁇ tional impact area throughout the comminutor 10 can be changed by altering the fan blade angle and the blade spacing or gap area to inlet area ratio.
  • the size of the comminuted particles can be altered.
  • a damper could be inserted which could be actuated at the point of impact of the fan which would thus change the air flow and pressure, thus altering the comminuting properties of the invention.
  • comminuted materials leaving outlet conduit 44 could be rechanneled into input conduit 24 and be further reduced in size. It is to be further understood that the present invention can be applied to other areas such as fine particle technology, biotechnology, heterogeneous combustion, multi-phase and turbulen/t heat transfer, pollution control, feedback control and explosion prevention. Additional industrial applications include boiler and dryer combustion chambers, asphalt/ lime/cement/gypsum kiln combustion chambers, incinerator combustion chambers and ammonia reformer combustion chambers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

Appareil et procédé de broyage pneumatique de matériaux. Les appareils connus pour broyer pneumatiquement un matériau demandent beaucoup d'énergie et sont inefficaces. Ces problèmes sont résolus par l'appareil de broyage pneumatique (10) de l'invention, lequel comprend: une enceinte (16) contenant un ventilateur (14) connecté de manière opérative à un moteur (22), l'enceinte (16) ayant une ouverture d'admission (28) alignée avec un axe du ventilateur (14) et une ouverture de sortie (42) prévue sur le périmètre de l'enceinte (16); un conduit d'admission (30) monté sur l'enceinte (16); un conduit d'admission (30) monté sur l'enceinte (16) et entourant l'ouverture d'entrée (28), le conduit d'admission (30) comprenant une section de forme tronconique adjacente à l'enceinte; et un conduit de sortie (44) fixé à l'enceinte et entourant l'ouverture de sortie (42). Le matériau à triturer est introduit dans le conduit d'admission (30) et est aspiré dans la section de forme tronconique par l'aspiration produite par le ventilateur (14). Le matériau est trituré dans le conduit d'admission (30) dans une zone d'impact par rotation qui se trouve directement sous le ventilateur (14), après quoi le matériau est aspiré au travers du ventilateur (14) et sort par la conduite de sortie (44) de force par la pression produite par le ventilateur (14).
PCT/US1986/000122 1985-01-31 1986-01-21 Dispositif et procede de broyage pneumatique Ceased WO1986004527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69704285A 1985-01-31 1985-01-31
US697,042 1985-01-31

Publications (1)

Publication Number Publication Date
WO1986004527A1 true WO1986004527A1 (fr) 1986-08-14

Family

ID=24799554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/000122 Ceased WO1986004527A1 (fr) 1985-01-31 1986-01-21 Dispositif et procede de broyage pneumatique

Country Status (5)

Country Link
EP (1) EP0209580A1 (fr)
AU (1) AU5357186A (fr)
CA (1) CA1305116C (fr)
WO (1) WO1986004527A1 (fr)
ZA (1) ZA86711B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998035756A1 (fr) * 1997-02-12 1998-08-20 Next Century Technologies Ltd. Appareil de traitement d'un materiau et ventilateur associe
WO2000024518A1 (fr) * 1998-10-28 2000-05-04 Douglas Forbes Dispositif et procede permettant de produire un materiau granulaire
GB2357499A (en) * 1999-08-11 2001-06-27 Mark Youds Methods and apparatus for sewage processing and treatment
GB2358629A (en) * 2000-05-18 2001-08-01 Mark William Youds Cyclone apparatus for treating sewage, dissociating water, comminuting matter
GB2354232B (en) * 1999-08-03 2001-11-07 Mark William Youds Sewage processing treatment invention

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138087C (fr) *
US1090073A (en) * 1911-01-07 1914-03-10 Gen Electric Centrifugal pump.
US2851289A (en) * 1957-03-22 1958-09-09 Thiokol Chemical Corp Recirculation seal with plastic wear ring for hydraulic apparatus
US3255793A (en) * 1963-03-01 1966-06-14 Francis H Clute & Son Inc Vacuum comminutor
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138087C (fr) *
US1090073A (en) * 1911-01-07 1914-03-10 Gen Electric Centrifugal pump.
US2851289A (en) * 1957-03-22 1958-09-09 Thiokol Chemical Corp Recirculation seal with plastic wear ring for hydraulic apparatus
US3255793A (en) * 1963-03-01 1966-06-14 Francis H Clute & Son Inc Vacuum comminutor
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998035756A1 (fr) * 1997-02-12 1998-08-20 Next Century Technologies Ltd. Appareil de traitement d'un materiau et ventilateur associe
AU742906B2 (en) * 1997-02-12 2002-01-17 Next Century Technologies Ltd. Apparatus for processing a material and fan therefor
WO2000024518A1 (fr) * 1998-10-28 2000-05-04 Douglas Forbes Dispositif et procede permettant de produire un materiau granulaire
GB2354232B (en) * 1999-08-03 2001-11-07 Mark William Youds Sewage processing treatment invention
GB2357499A (en) * 1999-08-11 2001-06-27 Mark Youds Methods and apparatus for sewage processing and treatment
GB2357499B (en) * 1999-08-11 2001-10-24 Mark Youds Methods and apparatus for sewage processing and treatment
GB2358629A (en) * 2000-05-18 2001-08-01 Mark William Youds Cyclone apparatus for treating sewage, dissociating water, comminuting matter
GB2358629B (en) * 2000-05-18 2001-12-19 Mark William Youds Formulae, methods and apparatus for the: treatment of; processing of; pasteurisation; dissociating water in; and the communication of: materials;

Also Published As

Publication number Publication date
ZA86711B (en) 1986-09-24
EP0209580A1 (fr) 1987-01-28
AU5357186A (en) 1986-08-26
CA1305116C (fr) 1992-07-14

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