WO2008106243A1 - Dense phase pump for pulverulent material - Google Patents

Dense phase pump for pulverulent material Download PDF

Info

Publication number
WO2008106243A1
WO2008106243A1 PCT/US2008/051038 US2008051038W WO2008106243A1 WO 2008106243 A1 WO2008106243 A1 WO 2008106243A1 US 2008051038 W US2008051038 W US 2008051038W WO 2008106243 A1 WO2008106243 A1 WO 2008106243A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
port
pulverulent material
fluidized
mixture
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/US2008/051038
Other languages
French (fr)
Inventor
Roger T. Cedoz
John F. Schaupp
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works 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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to DE212008000020U priority Critical patent/DE212008000020U1/en
Publication of WO2008106243A1 publication Critical patent/WO2008106243A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1463—Arrangements for supplying particulate material the means for supplying particulate material comprising a gas inlet for pressurising or avoiding depressurisation of a powder container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder

Definitions

  • This invention relates to apparatus and methods for the transport of pulverulent materials, hereinafter sometimes referred to as powder. It is disclosed in the context of powders which are used to coat articles. Such powders are hereinafter sometimes described as coating powders, powder coating materials, or similar terms.
  • a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes first, second, third and fourth ports.
  • the first port is provided for entry of a fluidizing gas or mixture of gases to the vessel.
  • the second port permits fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate to promote fluidization of bulk pulverulent material introduced into the vessel.
  • the third port permits fluidizing gas or mixture of gases to escape from the vessel at a selectively variable rate to cause fluidized pulverulent material to flow from the vessel.
  • the fluidized pulverulent material is withdrawn from the vessel through the fourth port under the control of the third port.
  • a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes first, second, third and fourth ports.
  • the first port is provided for entry of a fluidizing gas or mixture of gases to the vessel.
  • the second port controls a first stream of fluidizing gas or mixture of gases escaping from the vessel at a relatively constant rate to promote the fluidization of bulk pulverulent material introduced into the vessel.
  • the third port is selectively controlled to vary the rate of escape of a second stream of fluidizing gas or mixture of gases.
  • the fluidized pulverulent material is withdrawn from the vessel through the fourth port at a rate in opposition to the rate of escape of the second stream of fluidizing gas or mixture of gases.
  • the vessel further includes a fifth port for introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
  • the vessel includes a semipermeable membrane having a first side and a second side.
  • the first port is provided on the first side.
  • the second, third and fourth ports are provided on the second side.
  • the second side is adapted for receipt of bulk pulverulent material to be fluidized in the vessel.
  • the vessel includes a pulverulent material pickup conduit including a fifth port which lies in the fluidized powder zone of vessel.
  • the fourth port is coupled to the second end of pulverulent material pickup conduit.
  • a coating system is combined with the vessel.
  • the coating system includes a pulverulent material applicator and a conduit coupling the fourth port to the pulverulent material applicator.
  • a method of operating a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes providing on the vessel a first port, supplying a fluidizing gas or mixture of gases to the vessel through the first port, providing on the vessel a second port, permitting fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate through the second port to promote the fluidization of bulk pulverulent material introduced into the vessel, providing on the vessel a third port, permitting fluidizing gas or mixture of gases to escape from the vessel through the third port at a selectively variable rate, providing on the vessel a fourth port, and withdrawing fluidized pulverulent material from the vessel through the fourth port. Fluidized pulverulent material flows from the vessel through the fourth port in opposition to the selectively variable rate of escape of the
  • the method further includes providing on the vessel a fifth port and selectively opening the fifth port and introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
  • FIG. 1 illustrates a block diagram useful in understanding the invention
  • Fig. 2 illustrates a partly sectional side elevational view of components of the system illustrated in Fig. 1;
  • Fig. 3 illustrates a fragmentary, partly longitudinal sectional view of a detail of the system illustrated in Figs. 1-2;
  • Fig. 4 illustrates a fragmentary longitudinal sectional view of an alternative detail to the detail illustrated in Fig. 3.
  • a powder coating system 20 includes a powder dispensing device or applicator 22 for atomizing and dispensing a selected powder coating material toward an article 24 (hereinafter sometimes a target) to be coated thereby. See Fig. 2.
  • the powder coating material is typically transported to the applicator 22 on a stream of delivery gas, such as compressed air.
  • the powder is delivered from a pressurized vessel 30, such as a fluidized bed.
  • the powder stream is conveyed through a tube 34 from fluidized bed 30 to the applicator 22.
  • the powder is transported to the applicator 22 nozzle and dispersed as powder particles.
  • a fluidized bed 30 is used to pump dense phase powder to an applicator 22.
  • the fluidized bed 30 includes powder supply tube 34, a fill port 35 and closure permitting the adding of powder, a fixed vent port 40 and a variable vent port 42.
  • the pressure in the fluidized bed 30 is achieved by having a supply of delivery gas introduced through a delivery gas port 44 under a semipermeable fluidizing membrane 46 of fluidized bed 30.
  • Semipermeable membrane 46 illustratively is (a) sintered resin or polymer material(s) that permits the delivery gas introduced through port 44 to pass through it, but prevents the powder coating material supplied through port 35 from passing through it.
  • Such materials are used, for example, in the fluidizing membranes of coating powder fluidizing beds, such as those illustrated and described in several of the above identified U. S. patents and published applications. Such materials include, for example, the porous plastics available from Atlas
  • the delivery gas passes through the fluidizing membrane 46, the powder, and is partially vented through the fixed port 40.
  • the delivery gas movement fluidizes the powder in bed 30.
  • the powder is transported through a powder pickup tube 48 (Fig. 2) from an inlet end 49 which lies in the fluidized powder zone of fluidized bed 30 upward through the powder outlet port 50 on fluidized bed 30 when a trigger valve 52 opens.
  • the trigger valve is illustrated as being on the applicator 22. However, it should be understood that it is also not uncommon to mount such trigger valves 52 on the fluidized bed 30 and have them controllable either from the fluidized bed 30 or from the dispensing device 22, or both.
  • opening trigger valve 52 permits the powder to travel to the output port 54 of the applicator 22 by virtue of the pressure differential between the fluidized bed 30 and the pressure in the environment at the output port 54 of the applicator 22, less any pressure losses in components 34, 48, 22.
  • Powder flow rate is controlled by controlling the pressure inside fluidized bed 30 by venting the internal pressure through fixed vent port 40 and variable vent port 42.
  • the method and apparatus provide flow control by controlling pressure inside fluidized bed 30 by venting fluidized bed 30 pressure through the fixed vent port 40 and variable vent port 42.
  • Variable vent port 42 illustratively comprises a valve 60 of the type illustrated and described in published US 2005/0253101 controlled from a microprocessor ( ⁇ P)-based valve controller module 62 which compares the pressure sensed by a pressure transducer 66 to atmospheric pressure to operate a stepper motor 68 associated with the valve 60 in a feedback loop.
  • Valve 42, controller module 62, transducer 66 and stepper motor 68 may all be of the general types illustrated and described in ITW Ransburg Electrostatic Systems AIRTRONIC Models: 79053 AirTronic Module Al 0449-XX Remote AirTronic Assembly, ⁇ 2005.
  • Pressure transducer 66 illustratively monitor the pressure below fluidizing membrane 46, as illustrated in Fig. 1, or the pressure within the powder fluidizing portion of fluidized bed 30, as illustrated in Fig. 2. Actuation of the stepper motor 68 adjusts the valve 60 to modulate the venting of compressed air from fluidized bed 30 as required to maintain the setpoint pressure in fluidized bed 30.
  • valve 60 Protection of the entry port 70 of valve 60 may be desired to minimize the entry of powder into valve 60. This can be achieved, for example, with a powder trap 71 of the general configuration illustrated in Fig. 3, or by placing a semipermeable disk 72, for example, a disk of the same material as fluidizing membrane 46, over the entry port 70 of valve 60, as illustrated in Fig. 4.
  • valve 60 includes an elastomeric sleeve 80 and the head 82 of valve needle 84 includes a wiper collar 86 that scrubs against the inside surface 88 of sleeve 80 as the stepper motor 68 advances and retracts the valve needle 84 toward and away from the seat 90 of valve 60. This scrubbing tends to wipe any accumulated powder from the adjacent surfaces of sleeve 80 and needle 84. The powder then falls back through port 70 into the powder trap 71.
  • powder coating system 20 applicator 22 target 24 venturi pump 26 positive displacement pump 28 fluidized bed 30 tube 34 fixed vent port 40 variable vent port 42 delivery gas port 44 semipermeable fluidizing membrane 46 powder pickup tube 48 inlet end 49 powder outlet port 50 on fluidized bed 30 trigger valve 52 on applicator 22 or fluidized bed 30 output port 54 of applicator 22

Landscapes

  • Nozzles (AREA)
  • Coating Apparatus (AREA)

Abstract

A vessel (30) for fluidizing bulk pμlverulent material to render the pulverulent material flowable for removal from the vessel (30) includes first, second, third and fourth ports (40, 42, 44, 50). The first port (44) is provided for entry of a fluidizing, gas or mixture of gases to the vessel (30). The second port (40) controls a first stream of fluidizing gas or mixture of gases escaping from the vessel (30) at a relatively constant rate to promote the fluidization of bulk pulverulent material introduced into the vessel (30). The third port (42) is selectively controlled to vary the rate of escape of a second stream of fluidizing gas or mixture of gases. The fluidized pulverulent material is withdrawn from the vessel (30) through the fourth port (50) at a rate in opposition to the rate of. escape ofthe second stream of fluidizing gas or mixture of gases.

Description

DENSE PHASE PUMP FOR PULVERULENT MATERIAL
FIELD OF THE INVENTION
This invention relates to apparatus and methods for the transport of pulverulent materials, hereinafter sometimes referred to as powder. It is disclosed in the context of powders which are used to coat articles. Such powders are hereinafter sometimes described as coating powders, powder coating materials, or similar terms.
BACKGROUND OF THE INVENTION Various types of powder coating equipment are known. There are, for example, the systems illustrated and described in the following listed U. S. Patents and published applications, and in the prior art cited therein: 2004/0174862; 2005/0207901; 2006/0159565; 2006/0185586; 4,744,701; 5,199,989; 5,215,261; 5,240,185; 5,271,695; 5,323,547; 5,335,828; 5,351,520; 5,473,947; 5,518,344; 5,662,772; 5,690,450; 5,768,800; 5,800,876; 6,432,173; 6,669,780; 6,878,205; and, 6,908,048; in WO 2006/084253, EP 1 454 675 A2 and DE 103 53 968; and in ITW Gema FPPOl Fresh Powder Pump Operating Instructions And Spare Parts List, November, 2004. There are also the devices illustrated and described in US 2005/0253101 and ITW Ransburg Electrostatic Systems AIRTRONIC Models: 79053 AirTronic Module Al 0449-XX Remote AirTronic Assembly, © 2005. The disclosures of all of those references are hereby incorporated herein by reference. This listing is not intended to be representations that a complete search of all relevant art has been made, or that no more pertinent art than that listed exists, or that the listed art is material to patentability. Nor should any such representation be inferred.
DISCLOSURE OF THE INVENTION
According to an aspect of the invention, a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes first, second, third and fourth ports. The first port is provided for entry of a fluidizing gas or mixture of gases to the vessel. The second port permits fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate to promote fluidization of bulk pulverulent material introduced into the vessel. The third port permits fluidizing gas or mixture of gases to escape from the vessel at a selectively variable rate to cause fluidized pulverulent material to flow from the vessel. The fluidized pulverulent material is withdrawn from the vessel through the fourth port under the control of the third port.
According to another aspect of the invention, a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes first, second, third and fourth ports. The first port is provided for entry of a fluidizing gas or mixture of gases to the vessel. The second port controls a first stream of fluidizing gas or mixture of gases escaping from the vessel at a relatively constant rate to promote the fluidization of bulk pulverulent material introduced into the vessel. The third port is selectively controlled to vary the rate of escape of a second stream of fluidizing gas or mixture of gases. The fluidized pulverulent material is withdrawn from the vessel through the fourth port at a rate in opposition to the rate of escape of the second stream of fluidizing gas or mixture of gases.
Illustratively, the vessel further includes a fifth port for introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
Illustratively, the vessel includes a semipermeable membrane having a first side and a second side. The first port is provided on the first side. The second, third and fourth ports are provided on the second side. The second side is adapted for receipt of bulk pulverulent material to be fluidized in the vessel. Further illustratively, the vessel includes a pulverulent material pickup conduit including a fifth port which lies in the fluidized powder zone of vessel. The fourth port is coupled to the second end of pulverulent material pickup conduit.
Illustratively, a coating system is combined with the vessel. The coating system includes a pulverulent material applicator and a conduit coupling the fourth port to the pulverulent material applicator. According to another aspect of the invention, a method of operating a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel includes providing on the vessel a first port, supplying a fluidizing gas or mixture of gases to the vessel through the first port, providing on the vessel a second port, permitting fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate through the second port to promote the fluidization of bulk pulverulent material introduced into the vessel, providing on the vessel a third port, permitting fluidizing gas or mixture of gases to escape from the vessel through the third port at a selectively variable rate, providing on the vessel a fourth port, and withdrawing fluidized pulverulent material from the vessel through the fourth port. Fluidized pulverulent material flows from the vessel through the fourth port in opposition to the selectively variable rate of escape of the fluidizing gas or mixture of gases.
Illustratively according to this aspect of the invention, the method further includes providing on the vessel a fifth port and selectively opening the fifth port and introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
BRIEF DESCRIPTION OF THE DRAWINGS The invention may best be understood by referring to the following detailed description and accompanying drawings which illustrate the invention, hi the drawings:
Fig. 1 illustrates a block diagram useful in understanding the invention; Fig. 2 illustrates a partly sectional side elevational view of components of the system illustrated in Fig. 1;
Fig. 3 illustrates a fragmentary, partly longitudinal sectional view of a detail of the system illustrated in Figs. 1-2; and,
Fig. 4 illustrates a fragmentary longitudinal sectional view of an alternative detail to the detail illustrated in Fig. 3. DETAILED DESCRIPTIONS OF ILLUSTRATIVE EMBODIMENTS
Referring to Fig. 1, a powder coating system 20 includes a powder dispensing device or applicator 22 for atomizing and dispensing a selected powder coating material toward an article 24 (hereinafter sometimes a target) to be coated thereby. See Fig. 2. The powder coating material is typically transported to the applicator 22 on a stream of delivery gas, such as compressed air. The powder is delivered from a pressurized vessel 30, such as a fluidized bed. The powder stream is conveyed through a tube 34 from fluidized bed 30 to the applicator 22. The powder is transported to the applicator 22 nozzle and dispersed as powder particles.
Every effort is made in a powder delivery system 20 to provide a powder particle stream having a consistent output without any pulsation. Care must also be taken in the design, construction and operation of the powder coating system 20 that the powder particles do not drop from the powder stream as they travel from the fluidized bed 30 to the applicator 22. Thus, for example, care is taken in the selection of the tube 34 cross sectional area (which is typically circular) to maintain the speed at which the delivery gas and powder flow fast enough to maintain the powder suspended in the delivery gas flow through the tube 34.
A fluidized bed 30 is used to pump dense phase powder to an applicator 22. The fluidized bed 30 includes powder supply tube 34, a fill port 35 and closure permitting the adding of powder, a fixed vent port 40 and a variable vent port 42. The pressure in the fluidized bed 30 is achieved by having a supply of delivery gas introduced through a delivery gas port 44 under a semipermeable fluidizing membrane 46 of fluidized bed 30. Semipermeable membrane 46 illustratively is (a) sintered resin or polymer material(s) that permits the delivery gas introduced through port 44 to pass through it, but prevents the powder coating material supplied through port 35 from passing through it. Such materials are used, for example, in the fluidizing membranes of coating powder fluidizing beds, such as those illustrated and described in several of the above identified U. S. patents and published applications. Such materials include, for example, the porous plastics available from Atlas
Minerals & Chemicals, Inc., P.O. Box 38, 1227 Valley Road, Mertztown, PA 19539. The delivery gas passes through the fluidizing membrane 46, the powder, and is partially vented through the fixed port 40. The delivery gas movement fluidizes the powder in bed 30. The powder is transported through a powder pickup tube 48 (Fig. 2) from an inlet end 49 which lies in the fluidized powder zone of fluidized bed 30 upward through the powder outlet port 50 on fluidized bed 30 when a trigger valve 52 opens. The trigger valve is illustrated as being on the applicator 22. However, it should be understood that it is also not uncommon to mount such trigger valves 52 on the fluidized bed 30 and have them controllable either from the fluidized bed 30 or from the dispensing device 22, or both. In any event, opening trigger valve 52 permits the powder to travel to the output port 54 of the applicator 22 by virtue of the pressure differential between the fluidized bed 30 and the pressure in the environment at the output port 54 of the applicator 22, less any pressure losses in components 34, 48, 22. Powder flow rate is controlled by controlling the pressure inside fluidized bed 30 by venting the internal pressure through fixed vent port 40 and variable vent port 42.
The method and apparatus provide flow control by controlling pressure inside fluidized bed 30 by venting fluidized bed 30 pressure through the fixed vent port 40 and variable vent port 42. Variable vent port 42 illustratively comprises a valve 60 of the type illustrated and described in published US 2005/0253101 controlled from a microprocessor (μP)-based valve controller module 62 which compares the pressure sensed by a pressure transducer 66 to atmospheric pressure to operate a stepper motor 68 associated with the valve 60 in a feedback loop. Valve 42, controller module 62, transducer 66 and stepper motor 68 may all be of the general types illustrated and described in ITW Ransburg Electrostatic Systems AIRTRONIC Models: 79053 AirTronic Module Al 0449-XX Remote AirTronic Assembly, © 2005. Pressure transducer 66 illustratively monitor the pressure below fluidizing membrane 46, as illustrated in Fig. 1, or the pressure within the powder fluidizing portion of fluidized bed 30, as illustrated in Fig. 2. Actuation of the stepper motor 68 adjusts the valve 60 to modulate the venting of compressed air from fluidized bed 30 as required to maintain the setpoint pressure in fluidized bed 30.
Protection of the entry port 70 of valve 60 may be desired to minimize the entry of powder into valve 60. This can be achieved, for example, with a powder trap 71 of the general configuration illustrated in Fig. 3, or by placing a semipermeable disk 72, for example, a disk of the same material as fluidizing membrane 46, over the entry port 70 of valve 60, as illustrated in Fig. 4. To provide additional protection of valve 60 against the effects of entry of powder through port 70, valve 60 includes an elastomeric sleeve 80 and the head 82 of valve needle 84 includes a wiper collar 86 that scrubs against the inside surface 88 of sleeve 80 as the stepper motor 68 advances and retracts the valve needle 84 toward and away from the seat 90 of valve 60. This scrubbing tends to wipe any accumulated powder from the adjacent surfaces of sleeve 80 and needle 84. The powder then falls back through port 70 into the powder trap 71.
powder coating system 20 applicator 22 target 24 venturi pump 26 positive displacement pump 28 fluidized bed 30 tube 34 fixed vent port 40 variable vent port 42 delivery gas port 44 semipermeable fluidizing membrane 46 powder pickup tube 48 inlet end 49 powder outlet port 50 on fluidized bed 30 trigger valve 52 on applicator 22 or fluidized bed 30 output port 54 of applicator 22

Claims

What is claimed is:
1. A vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel, the vessel including a first port for entry of a fluidizing gas or mixture of gases to the vessel, a second port permitting fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate to promote fluidization of bulk pulverulent material introduced into the vessel, a third port permitting fluidizing gas or mixture of gases to escape from the vessel at a selectively variable rate to cause fluidized pulverulent material to flow from the vessel, and a fourth port through which fluidized pulverulent material is withdrawn from the vessel under the control of the third port.
2. The vessel of claim 1 further including a fifth port for introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
3. The vessel of claim 1 further including a semipermeable membrane having a first side and a second side, the first port provided on the first side, the second, third and fourth ports provided on the second side, and the second side adapted for receipt of bulk pulverulent material to be fluidized in the vessel.
4. The vessel of claim 3 further including a pulverulent material pickup conduit including a fifth port which lies in the fluidized powder zone of vessel, the fourth port being coupled to the second end of pulverulent material pickup conduit.
5. In combination with the vessel of claim 1, a coating system including a pulverulent material applicator and a conduit coupling the fourth port to the pulverulent material applicator.
6. A vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel, the vessel including a first port for entry of a fluidizing gas or mixture of gases to the vessel, a second port controlling a first stream of fluidizing gas or mixture of gases escaping from the vessel at a relatively constant rate to promote the fluidization of bulk pulverulent material introduced into the vessel, a third port for selectively controlling a second stream of fluidizing gas or mixture of gases escaping from the vessel at a selectively variable rate, and a fourth port through which fluidized pulverulent material is withdrawn from the vessel under the control of the third port, fluidized pulverulent material flowing from the vessel in opposition to the rate of escape of the second stream of fluidizing gas or mixture of gases.
7. The vessel of claim 6 further including a fifth port for introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
8. The vessel of claim 6 further including a semipermeable membrane having a first side and a second side, the first port provided on the first side, the second, third and fourth ports provided on the second side, and the second side adapted for receipt of bulk pulverulent material to be fluidized in the vessel.
9. The vessel of claim 7 further including a pulverulent material pickup conduit including a fifth port which lies in a fluidized powder zone of vessel, the fourth port being coupled to the second end of pulverulent material pickup conduit.
10. In combination with the vessel of claim 6, a coating system including a pulverulent material applicator and a conduit coupling the fourth port to the pulverulent material applicator.
11. A method of operating a vessel for fluidizing bulk pulverulent material to render the pulverulent material flowable for removal from the vessel, the method including providing on the vessel a first port, supplying a fluidizing gas or mixture of gases to the vessel through the first port, providing on the vessel a second port, permitting fluidizing gas or mixture of gases to escape from the vessel at a relatively constant rate through the second port to promote the fluidization of bulk pulverulent material introduced into the vessel, providing on the vessel a third port, permitting fluidizing gas or mixture of gases to escape from the vessel through the third port at a selectively variable rate, providing on the vessel a fourth port, and withdrawing fluidized pulverulent material from the vessel through the fourth port, fluidized pulverulent material flowing from the vessel through the fourth port in opposition to the selectively variable rate of escape of the fluidizing gas or mixture of gases.
12. The vessel of claim 11 further including providing on the vessel a fifth port and selectively opening the fifth port and introducing pulverulent material to be fluidized into the vessel for fluidization and withdrawal.
PCT/US2008/051038 2007-02-27 2008-01-15 Dense phase pump for pulverulent material Ceased WO2008106243A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212008000020U DE212008000020U1 (en) 2007-02-27 2008-01-15 Dense-flow pump for fine-powdered material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/679,245 2007-02-27
US11/679,245 US20080205189A1 (en) 2007-02-27 2007-02-27 Dense phase pump for pulverulent material

Publications (1)

Publication Number Publication Date
WO2008106243A1 true WO2008106243A1 (en) 2008-09-04

Family

ID=39401097

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/051038 Ceased WO2008106243A1 (en) 2007-02-27 2008-01-15 Dense phase pump for pulverulent material

Country Status (4)

Country Link
US (1) US20080205189A1 (en)
DE (1) DE212008000020U1 (en)
TW (1) TW200843863A (en)
WO (1) WO2008106243A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2836307A1 (en) 2012-04-13 2015-02-18 Nordson Corporation Powder gun configurable for supply from venturi or dense phase pump
US20150084282A1 (en) * 2013-09-25 2015-03-26 Hogsback Designs, Inc Systems and methods for pneumatically actuated displays for colored powder
PL3238832T5 (en) 2016-04-29 2024-06-03 Wagner International Ag Powder conveying device for conveying coating powder to a powder applicator, powder coating installation and method for operating the powder conveying device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1454675A2 (en) * 2003-03-07 2004-09-08 Haden Schweitzer corporation Powder transport method and apparatus
FR2876303A1 (en) * 2004-10-08 2006-04-14 Sames Technologies Soc Par Act DEVICE FOR DOSING AND CONTINUOUS TRANSPORTING PULVERULENT PRODUCT, USE OF SUCH A DEVICE AND PROJECTING DEVICE FOR PROJECTING PRODUCT COMPRISING SUCH A DEVICE
WO2006084253A2 (en) * 2005-02-04 2006-08-10 Durr Systems, Inc. Powder paint transport system and method

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149884A (en) * 1963-01-07 1964-09-22 Magnet Cove Barium Corp Pneumatic conveyer
FR2521170B1 (en) * 1982-02-09 1986-11-21 Dietrich & Cie De PROCESS FOR ENAMELLING OBJECTS BY ELECTROSTATIC PISTOLING
US4744701A (en) * 1986-11-07 1988-05-17 Ransburg Corporation Drum unloader
US5271695A (en) * 1990-07-07 1993-12-21 Gema Volstatic Ag Device for pneumatically feeding powder from a container
ES2083537T3 (en) * 1990-12-27 1996-04-16 Matsuo Sangyo Kk DEVICE TO SUPPLY POWDER PAINT.
FR2677900B1 (en) * 1991-06-24 1993-10-08 Sames Sa INSTALLATION FOR ELECTROSTATIC SPRAYING OF POWDER COATING PRODUCT.
US5199989A (en) * 1991-07-31 1993-04-06 Ransburg Corporation Powder booth floor wiping mechanism
FR2680416B1 (en) * 1991-08-12 1995-06-30 Sames Sa FLUIDIZED POWDER FLOW MEASURING METHOD AND FLOW MEASURING DEVICE USING SUCH A METHOD.
DE69212756T2 (en) * 1992-04-30 1997-02-13 Nordson Corp Method and device for unloading powder from a container
US5654042A (en) * 1992-12-17 1997-08-05 Nordson Corporation Powder coating system for difficult to handle powders
TW371775B (en) * 1995-04-28 1999-10-11 Siemens Ag Method for the selective removal of silicon dioxide
US5768800A (en) * 1995-06-08 1998-06-23 Matsuo Sangyo Co. Ltd. Powder feed mechanism
DE19606214B4 (en) * 1996-02-20 2006-06-01 Abb Research Ltd. Method and device for controlling the discharge of a fluidized solid from a container
FR2812566B1 (en) * 2000-08-02 2003-02-21 Sames Sa DEVICE FOR SUPPLYING POWDER COATING PRODUCT TO A PROJECTOR AND PROJECTION INSTALLATION COMPRISING SUCH A DEVICE
US20020046702A1 (en) 2000-10-24 2002-04-25 James M. Browning Powder coating system and method for quick color change
US6669780B2 (en) * 2000-10-24 2003-12-30 Illinois Tool Works Inc. Color change booth
US6432173B1 (en) * 2000-10-27 2002-08-13 Donaldson Company, Inc. Centrifugal separator arrangement for powder coating recovery system and methods
DE10300280A1 (en) * 2003-01-08 2004-07-22 Itw Gema Ag Pump device for powder, process therefor and powder coating device
US6876205B2 (en) * 2003-06-06 2005-04-05 Advanced Energy Industries, Inc. Stored energy arc detection and arc reduction circuit
US7043518B2 (en) 2003-07-31 2006-05-09 Cradle Technologies, Inc. Method and system for performing parallel integer multiply accumulate operations on packed data
DE10353968A1 (en) 2003-11-19 2005-07-07 Itw Gema Ag Coating powder conveying device, especially for transporting powder from a storage container, e.g. a sack or bag, has a hose membrane pump for transporting powder that has been fluidized using compressed air
US7241080B2 (en) * 2004-03-22 2007-07-10 Durr Industries, Inc. Pump for transferring particulate material
US7168678B2 (en) * 2004-05-17 2007-01-30 Illinois Tool Works Inc. Needle valve construction
US7530768B2 (en) * 2005-02-17 2009-05-12 Durr Systems, Inc. Powder conveying pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1454675A2 (en) * 2003-03-07 2004-09-08 Haden Schweitzer corporation Powder transport method and apparatus
FR2876303A1 (en) * 2004-10-08 2006-04-14 Sames Technologies Soc Par Act DEVICE FOR DOSING AND CONTINUOUS TRANSPORTING PULVERULENT PRODUCT, USE OF SUCH A DEVICE AND PROJECTING DEVICE FOR PROJECTING PRODUCT COMPRISING SUCH A DEVICE
WO2006084253A2 (en) * 2005-02-04 2006-08-10 Durr Systems, Inc. Powder paint transport system and method

Also Published As

Publication number Publication date
DE212008000020U1 (en) 2009-11-26
TW200843863A (en) 2008-11-16
US20080205189A1 (en) 2008-08-28

Similar Documents

Publication Publication Date Title
US6398462B1 (en) Powder transfer apparatus having powder fluidizing tube
CN109070112B (en) Powder conveyor for conveying coating powder to a powder applicator, powder coating system and method for operating a powder conveyor
US7241080B2 (en) Pump for transferring particulate material
CN101563167B (en) Powder pump with vacuum filling
EP2376236B1 (en) Powder hopper with quiet zone, a combination of a powder hopper and a powder spray gun and a method of operating a powder hopper
CN105121027A (en) Powder conveyor and associated operating method
US20140248095A1 (en) Device for pneumatically conveying powder and method for cleaning such a device
WO2002024558A1 (en) Powder weight or volumetric or counting feeder
JPH1024255A (en) Powder coating device
CN101821016A (en) Method for providing granular auxiliary materials for coating systems
US7273339B2 (en) Powder transport method and apparatus
US20080205189A1 (en) Dense phase pump for pulverulent material
CN1150110A (en) powder conveying mechanism
US8978578B2 (en) Powder delivery apparatus
EP1506817B1 (en) Canister assembly for powder delivery sytem
CA2346147A1 (en) Coating device for coating powder
CN100571891C (en) Devices for conveying powdery fluidized media
CN107148304B (en) Powder containers for powder coating equipment
US20160001315A1 (en) System and Method for Conveying Low-Shear Tolerant Matrixes
EP0455686A1 (en) Feeder for particulate material
JP3062792B2 (en) Powder coating material transfer device and transfer method
JPH06286872A (en) Powder/grain pneumatic transport method, transport temporary stop method and device therefor
US20240042409A1 (en) Device for aerosol generation and use of a device for aerosol generation
CA2587099C (en) Manifold for selectively connecting powder material sources
JP2020190180A (en) Spraying device and spraying method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08705914

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2120080000202

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08705914

Country of ref document: EP

Kind code of ref document: A1