CA1321478C - Particle blast cleaning and treating of surfaces - Google Patents
Particle blast cleaning and treating of surfacesInfo
- Publication number
- CA1321478C CA1321478C CA000601142A CA601142A CA1321478C CA 1321478 C CA1321478 C CA 1321478C CA 000601142 A CA000601142 A CA 000601142A CA 601142 A CA601142 A CA 601142A CA 1321478 C CA1321478 C CA 1321478C
- Authority
- CA
- Canada
- Prior art keywords
- particle
- treating
- flow
- blast
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
- B24C11/005—Selection of abrasive materials or additives for abrasive blasts of additives, e.g. anti-corrosive or disinfecting agents in solid, liquid or gaseous form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C5/00—Working or handling ice
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Abstract
13597 This is disclosed a method of particle blast cleaning and treating of surfaces and apparatus therefor including metering a flow of particles from a supply, positively feeding the particle flow from the metering stage into a mixer or fluidizer, fluidizing the particle flow with a controlled, metered flow of fluid taken from a pressurized fluid source, pneumatically conveying a particlefluid stream from the fluidizing stage to a blast head, and controlling the fluid flow rates and the particle amount rates and the mass flow ratios of the two flows precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
Description
-~32~7~ 13597 BACKGROUND OF TH~ INVENTION:
This invention relates to a method and apparatus for particle blast cleaning and treating of surfaces.
Sand blast technoloqy has been well developed and widely used and acceptable cleaning results are able to be obtained with crude systems and low cost abrasives. However many types of surfaces of materials are not able to be cleaned in this way because of damage to the surfaces and possible effect on the integrity of the objects being cleaned . Also, aside from environmental considerations nearby objects are often inconvenienced or damaged by over spray effects and clean-up is normally time consuming and costly. Over the last few years the use of other abra-sive materials such as plastic chips and frozen liquids such as water (H20) ice, dry ice (C02), and pellets of ; 15 these mixed with certain chemical materials have been ` proposed for use in air blast technology to clean, wash, decontaminate or otherwise treat surfaces of a wide range of objects and materials.
The following are patents that show methods and apparatus using these types of materials:
British Patent No. lr397,102 filed March 22, 1972 Published June 11, 1975 U.S. Patent No. 4,703,590 issued November 3, 1987 U.S. Patent No. 4,769,956 issued September 13, 1988 French Patent App. 80-03099 filed February 8, 1980 Publication No. 2,475,g25 French Patent App. 80-24375 filed November 17, 1980 Publication No. 2,494,160 ~ritish Patent App. GB 2,171,624A Published September 3, 1986 Japanese Public Dlsclosure No. 97533 dated August 2, U.S. Patent No. 3,676~963 issued July 18, 1972 All of these patents disclose abrasive particle blast systems involving rudimentary apparatus for preparing the pellets and controlling th~ size, shapes, and condition of these in relation to the air blast flow streams.
BRIEF SUMMARY OF THE I~VENTION: ~ 3 2 1 ~ 7 .
It is an object of the present inven-tion to provide a method and apparatus for cleaning and treating surfaces of objects and materials using particles wherein the various parameters such as particle size, shape, amounts and ratios, and air blast flow velocities are under precise control over wide ranges such that different surface types and conditions can be cleaned or treated more effectively, convenien-tly and economically.
This and other objects of the invention are achieved by a method of particle blast cleaning and treating of surfaces comprising metering a flow of particles from a supply, ~^ positively feeding the particle flow from the metering stage into a fluidizer, fluidizing the particle flow with a controlled metered flow of fluid taken from a pressurized fluid source, pneumatically conveying a particle-fluid stream from the fluid-izing stage to a blast head, and controlling the fluid flow rates and -the particle amount rates and the mass flow ratios of the flows precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
The objects of the invention are also achieved by apparatus for effec-ting the above method s-teps.
BRIEF DESCRIPTION OF DRAWING:
FIGURE 1 is a flow diagram of a particle blast cleaning and treating system according to an embodiment v~ the invention wherein a wide variety of material including frozen liquids may be used.
FIGURE 2 is a flow diagram of a particle blast system similar to that of ~igure 1 but with acceleration input to the blast head.
FIGURE 3 is a flow diagram of a blast cleaning and treating system using a batch supply of particles with con-ditioning of media particles and air supply.
FIGURE 4 is a flow diagram of a complete system using a continuous production of a frozen liquid such as lH20~ as the treating material and with integrated system control.
. ~
~3~ 132~78 FIGURE 5 shows typical e~uipment for a bateh media input system according to the flow diagram of Figure 1.
FIGURE 6 is a eross-seetion of the fluidizer accel-erator assembly as used in the apparatus shown in Figure 5.
FIGURE 7 is a cross-section of a single stage aceel-erator/blast head nozzle as used in the apparatus shown in Figures 3 and 4.
FIGURE 8 is a cross-seetion of a blast head consisting oE a two stage accelerator, nozzle set as used in the appar-atus shown in Figures 3 and 4.
FIGURE 9 is a broken sectional view of the system in a mobile unit.
FIGURE 10 is a diagrammatic view of the air supply system.
FIGURE 11 is a diagrammatic view of the refrigeration and ice supply system.
DESCRIPTION OF EMBODIMENTS OF THE INVENTION:
-Figure 1 is a flow diagram of a blast system using a media including frozen liquids where the input particles are fed either from a media fresh or recycle supply to an atmospherie hopper 2. From the hopper the material is fed by batch to surge tank 3. Compressed air (or other suitable gases) is taken from supply 1 and after passing through filter la, dryer lb having a condensate trap lc to conden-sate return line ld, and inlet val~e le provides a fluidizing air supply via surge fluidizer valve 3a eontrolled by press-ure meter 3b to the surge tank. The media materials then go to metering device 4 which would typieally be a scroll positive displaeement pump driven by variable speed motor 4a and eontrolled from computer station 7 to provide a precisely controlled input to fluidizer/accelerator 5.
This latter also has pressurized air inputs via air flow control valve 5a controlled from computer station 7 and fluidizer air control valve 5b connected via pressure control 5c to pressure control 3b and computer 7 through flow indication and controller 7a to precisely control the rate amounts and ratios of the air and treating particle streams. Output from the fluidizer/accelerator is conveyed pneumatically to blast nozzle 6.
' 132~ ~7~
Figure 2 is a blast system similar to that of Figure 1 but where the metering device provides controlled media at a ~ pressure consistent with higher pressure of the fluidizer 5.
Fluidizer 8, control valve 8a assist in pneumatically trans-porting the media from hopper 2 to metering device 4. Fluid-izer 5 provides only enough energy to transport the particle mi~ through the hose without undue damage of the media part-icles such as ice, plastic chips, nut shells, glass beads, sand, gritty materials, etc. Acceleration energy is added at the blast head 6 via additional controlled air. This air input is ; taken from the air supply via air flow control valve 9 controlled by flow indicator and controller 9a connected to computer 7. If desired additives such as cleaning and chemical agents may be introduced into the system by adding to - the particle media feed as shown.
Figure 3 is a more detailed flow diagram of the system with air as the propellant and ice as the treating media. Air from a compressed air source 1 is passed through af-tercooler 17 to reservoir 18 and from there through air filter l9a to dryer 20. The aftercooler, reservoir and dryer are connected through traps 21a, 21b, and 21c to condensate return line 22. Air under pressure from the reservoir and dryer is fed through air filter l9b to air flow control valves 23, 24, and 25 with the flow rates being measured and controlled by flow meters 23a/
24a, and 25a. Ice from a batch supply source 2a is fed into hopper 2 whose output feed is controlled by variable speed motor 47 and controlled air supply from the compressed air sources via control valves 2c and 2d.
Ice from the hopper is passed to ice crusher/sizer 29 with the crushed iC2 passing to surge tank 30 and then to metering apparatus 31 which positively feeds controlled amounts of ice crystals or pellets to fluidizer 32 where they are com-bined and fluidized with a pressurized air flow from control valve 23. Line 33 carries the fluidized air and treating ice particles into blast head 34 where this flow has injected into it at entry points 34a and 34b two high velocity air streams from control valves 24 and 25 via lines 36 and 37 resulting in a treating particle blast to a work piece for cleaning purposes.
~ ... .. . . .
- 1321~7~
Crusher/sizer 29 is connected to variable speed drive 47, cooled by the refrigerant supply 42, crushes and sizes the ice Erom the hopper to a controlled working size after which it is fed into surge tank 30. Pressurized air input via control valve 48 acts with control valve 49 as an auto-matic purge system sending reject fines and purge air to - output line 50. Ice is fed from the surge tank into metering device 31 which would typically be a scroll positive dis-placement pump connected to a variable speed drive motor 52 to positively feed a measured supply of ice into fluid-. izer 32.
Figure 4 is similar to Figure 3 but shows a completesystem including ice making apparatus and a computerized control system. Water is fed to precooler/deaerator 26 ~: 15 and then to ice maker 27. If desired chemicals may be added to the feed water via line 28. Other media may be added by ; simi.lar process systems for multiphase treating flows. Pre-coo].er 26 is operated through valve 40 controlled by auto-matic temperature control 41 to a refrigerant supply 42 having a temperature control 43. The rate of i.ce making in ice maker 27 is controlled by variable speed drive 44 which is supplied according to demand of metering rates set by metering device 52 which is itself the master control point Coolant demand is through valve 45 controlled by automatic temperature control 46 to the refrigerant supply 42. The surge tank 30 also cooled by the refrigerant source had its level monitored by the level control 51 which controls variable speed drives 44 and 47 to main-tain the appropriate ice supply levels. Valves 48 and 49 serve to purge rejects~
As in Figure 3 ice from the surge tank is fed to metering device 31 and to fluidizer 32 which provides an air/ice supply via line 33 to blast head 34.
The complete system is monitored and controlled from master control panel 60 and remote control panels 61 and 62 with connections to -the various air and ice flow control valves and surge tank level controls.
In essence the overall s~stem is arranged to prepare treating material in suitable form and to monitor and control . .
.
-6- 132~7~
the mass flows of the air and particle flows and the ratios of these extremely precisely and over fairly wide range such that a wide spectrum of material surfaces can be treated without damage to these surfaces and with bestoverall effect.
The system provides a positive, metered controlled flow of both air and media with propellant energy added at appropriate points resulting in less energy loss and media damage.
Figure 5 shows the media feed equipment for a batch pressure pot blast system as shown in Figure 1. The particle media is fed into hopper 65 and then to surge vessel 66. A
compressed air input is taken from a supply through air flow control valves 67 which is item 7a of Figure 1 and 68 which forms items 5a and 5b of Fiyure 1 into fluidizer 69. The feed passes to metering pump 70 which is item ~ of Figure 1 connected to variable speed drive (4a of figure 1) and to fluidizer/accelerator 71 having compressed air inputs 71a and 71b. Output from the Eluidizer/accelerator is piped to the blast head.
Figure 6 shows the fluidizer/accelerator assembly as shown in Figure 5 (Item 71). Controlled, metered blast head media from the metering pump enters at 72 and is accelerated by a controlled, metered air input to jet nozzle 73. Fluid-izing air (metered and controlled) is injected at 7~1 and further fluidizes and accelerates the air/particle media - 25 stream with the output being piped -to the blast head.
Figure 7 shows a single stage fluidizer/accelerator of a type that could be used in Figure 2 (Item 6) with the non or partially fluidized media stream (metered and controlled) entering at 75 and a metered, controlled air stream injected at 76. This flow passes into annular distributing chamber 77 through a gap formed by pressure O-ring seal 78 into the venturi shaped interior to form a fluidizing, accelerating stream. The output provides a fluidized and accelerated air stream, controlled and metered to a required degree for trans-port, conveying and work energy to the blast head.
Figure 8 is a two stage accelerator/fluidizer similar to that of Figure 7 bu-t for ~ore precise control of conditions, having a second air input at 76a passing into the interior .
~7~ ~2~8 via annular distributing chamber 77a and the gap formed by O-ring seal 78a. This device ~orms the blast heads shown in Figures 3 and 4 ~Items 34, 34a and 34b).
A mobile version of the system is shown in Figure 9 with the air supply portion in Figure 10 and the refriger-ation and ice supply portion shown in Figure 11. Power plant 80 drives compressor 81 drawing ambient air frolll air intake 82 and sending it via line 83 to air cooler 84.
The air is then passed through condensate trap 84a to air - 10 xeservoir 85 having condensate trap 86, through air filter ~7 and dryer 88 and through air filter 89 to control valves 90.
The power plant also drives refrigeration plant 91 to provide refrigerant for ice making and cooling the ice process components. Water from tanks 92 passes through deaerator 93, and precooler 94 to ice maker and sizer g5.
The ice is crushed in crusher 9~ and passed to metering device 97 and fluidizer 98 which also has an air input from control valves 90 to direct a fluidized ice-air stream via line 99 to the blast heads. As shown, two compressed air Elows are taken from valves 90 via lines 100a and 100b.
Other elements shown are refrigerant cooler 101, engine cooler 102, fuel tank 103, control room 104 and control panel 105 (Figure 10).
: , ' , . ': . ,
This invention relates to a method and apparatus for particle blast cleaning and treating of surfaces.
Sand blast technoloqy has been well developed and widely used and acceptable cleaning results are able to be obtained with crude systems and low cost abrasives. However many types of surfaces of materials are not able to be cleaned in this way because of damage to the surfaces and possible effect on the integrity of the objects being cleaned . Also, aside from environmental considerations nearby objects are often inconvenienced or damaged by over spray effects and clean-up is normally time consuming and costly. Over the last few years the use of other abra-sive materials such as plastic chips and frozen liquids such as water (H20) ice, dry ice (C02), and pellets of ; 15 these mixed with certain chemical materials have been ` proposed for use in air blast technology to clean, wash, decontaminate or otherwise treat surfaces of a wide range of objects and materials.
The following are patents that show methods and apparatus using these types of materials:
British Patent No. lr397,102 filed March 22, 1972 Published June 11, 1975 U.S. Patent No. 4,703,590 issued November 3, 1987 U.S. Patent No. 4,769,956 issued September 13, 1988 French Patent App. 80-03099 filed February 8, 1980 Publication No. 2,475,g25 French Patent App. 80-24375 filed November 17, 1980 Publication No. 2,494,160 ~ritish Patent App. GB 2,171,624A Published September 3, 1986 Japanese Public Dlsclosure No. 97533 dated August 2, U.S. Patent No. 3,676~963 issued July 18, 1972 All of these patents disclose abrasive particle blast systems involving rudimentary apparatus for preparing the pellets and controlling th~ size, shapes, and condition of these in relation to the air blast flow streams.
BRIEF SUMMARY OF THE I~VENTION: ~ 3 2 1 ~ 7 .
It is an object of the present inven-tion to provide a method and apparatus for cleaning and treating surfaces of objects and materials using particles wherein the various parameters such as particle size, shape, amounts and ratios, and air blast flow velocities are under precise control over wide ranges such that different surface types and conditions can be cleaned or treated more effectively, convenien-tly and economically.
This and other objects of the invention are achieved by a method of particle blast cleaning and treating of surfaces comprising metering a flow of particles from a supply, ~^ positively feeding the particle flow from the metering stage into a fluidizer, fluidizing the particle flow with a controlled metered flow of fluid taken from a pressurized fluid source, pneumatically conveying a particle-fluid stream from the fluid-izing stage to a blast head, and controlling the fluid flow rates and -the particle amount rates and the mass flow ratios of the flows precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
The objects of the invention are also achieved by apparatus for effec-ting the above method s-teps.
BRIEF DESCRIPTION OF DRAWING:
FIGURE 1 is a flow diagram of a particle blast cleaning and treating system according to an embodiment v~ the invention wherein a wide variety of material including frozen liquids may be used.
FIGURE 2 is a flow diagram of a particle blast system similar to that of ~igure 1 but with acceleration input to the blast head.
FIGURE 3 is a flow diagram of a blast cleaning and treating system using a batch supply of particles with con-ditioning of media particles and air supply.
FIGURE 4 is a flow diagram of a complete system using a continuous production of a frozen liquid such as lH20~ as the treating material and with integrated system control.
. ~
~3~ 132~78 FIGURE 5 shows typical e~uipment for a bateh media input system according to the flow diagram of Figure 1.
FIGURE 6 is a eross-seetion of the fluidizer accel-erator assembly as used in the apparatus shown in Figure 5.
FIGURE 7 is a cross-section of a single stage aceel-erator/blast head nozzle as used in the apparatus shown in Figures 3 and 4.
FIGURE 8 is a cross-seetion of a blast head consisting oE a two stage accelerator, nozzle set as used in the appar-atus shown in Figures 3 and 4.
FIGURE 9 is a broken sectional view of the system in a mobile unit.
FIGURE 10 is a diagrammatic view of the air supply system.
FIGURE 11 is a diagrammatic view of the refrigeration and ice supply system.
DESCRIPTION OF EMBODIMENTS OF THE INVENTION:
-Figure 1 is a flow diagram of a blast system using a media including frozen liquids where the input particles are fed either from a media fresh or recycle supply to an atmospherie hopper 2. From the hopper the material is fed by batch to surge tank 3. Compressed air (or other suitable gases) is taken from supply 1 and after passing through filter la, dryer lb having a condensate trap lc to conden-sate return line ld, and inlet val~e le provides a fluidizing air supply via surge fluidizer valve 3a eontrolled by press-ure meter 3b to the surge tank. The media materials then go to metering device 4 which would typieally be a scroll positive displaeement pump driven by variable speed motor 4a and eontrolled from computer station 7 to provide a precisely controlled input to fluidizer/accelerator 5.
This latter also has pressurized air inputs via air flow control valve 5a controlled from computer station 7 and fluidizer air control valve 5b connected via pressure control 5c to pressure control 3b and computer 7 through flow indication and controller 7a to precisely control the rate amounts and ratios of the air and treating particle streams. Output from the fluidizer/accelerator is conveyed pneumatically to blast nozzle 6.
' 132~ ~7~
Figure 2 is a blast system similar to that of Figure 1 but where the metering device provides controlled media at a ~ pressure consistent with higher pressure of the fluidizer 5.
Fluidizer 8, control valve 8a assist in pneumatically trans-porting the media from hopper 2 to metering device 4. Fluid-izer 5 provides only enough energy to transport the particle mi~ through the hose without undue damage of the media part-icles such as ice, plastic chips, nut shells, glass beads, sand, gritty materials, etc. Acceleration energy is added at the blast head 6 via additional controlled air. This air input is ; taken from the air supply via air flow control valve 9 controlled by flow indicator and controller 9a connected to computer 7. If desired additives such as cleaning and chemical agents may be introduced into the system by adding to - the particle media feed as shown.
Figure 3 is a more detailed flow diagram of the system with air as the propellant and ice as the treating media. Air from a compressed air source 1 is passed through af-tercooler 17 to reservoir 18 and from there through air filter l9a to dryer 20. The aftercooler, reservoir and dryer are connected through traps 21a, 21b, and 21c to condensate return line 22. Air under pressure from the reservoir and dryer is fed through air filter l9b to air flow control valves 23, 24, and 25 with the flow rates being measured and controlled by flow meters 23a/
24a, and 25a. Ice from a batch supply source 2a is fed into hopper 2 whose output feed is controlled by variable speed motor 47 and controlled air supply from the compressed air sources via control valves 2c and 2d.
Ice from the hopper is passed to ice crusher/sizer 29 with the crushed iC2 passing to surge tank 30 and then to metering apparatus 31 which positively feeds controlled amounts of ice crystals or pellets to fluidizer 32 where they are com-bined and fluidized with a pressurized air flow from control valve 23. Line 33 carries the fluidized air and treating ice particles into blast head 34 where this flow has injected into it at entry points 34a and 34b two high velocity air streams from control valves 24 and 25 via lines 36 and 37 resulting in a treating particle blast to a work piece for cleaning purposes.
~ ... .. . . .
- 1321~7~
Crusher/sizer 29 is connected to variable speed drive 47, cooled by the refrigerant supply 42, crushes and sizes the ice Erom the hopper to a controlled working size after which it is fed into surge tank 30. Pressurized air input via control valve 48 acts with control valve 49 as an auto-matic purge system sending reject fines and purge air to - output line 50. Ice is fed from the surge tank into metering device 31 which would typically be a scroll positive dis-placement pump connected to a variable speed drive motor 52 to positively feed a measured supply of ice into fluid-. izer 32.
Figure 4 is similar to Figure 3 but shows a completesystem including ice making apparatus and a computerized control system. Water is fed to precooler/deaerator 26 ~: 15 and then to ice maker 27. If desired chemicals may be added to the feed water via line 28. Other media may be added by ; simi.lar process systems for multiphase treating flows. Pre-coo].er 26 is operated through valve 40 controlled by auto-matic temperature control 41 to a refrigerant supply 42 having a temperature control 43. The rate of i.ce making in ice maker 27 is controlled by variable speed drive 44 which is supplied according to demand of metering rates set by metering device 52 which is itself the master control point Coolant demand is through valve 45 controlled by automatic temperature control 46 to the refrigerant supply 42. The surge tank 30 also cooled by the refrigerant source had its level monitored by the level control 51 which controls variable speed drives 44 and 47 to main-tain the appropriate ice supply levels. Valves 48 and 49 serve to purge rejects~
As in Figure 3 ice from the surge tank is fed to metering device 31 and to fluidizer 32 which provides an air/ice supply via line 33 to blast head 34.
The complete system is monitored and controlled from master control panel 60 and remote control panels 61 and 62 with connections to -the various air and ice flow control valves and surge tank level controls.
In essence the overall s~stem is arranged to prepare treating material in suitable form and to monitor and control . .
.
-6- 132~7~
the mass flows of the air and particle flows and the ratios of these extremely precisely and over fairly wide range such that a wide spectrum of material surfaces can be treated without damage to these surfaces and with bestoverall effect.
The system provides a positive, metered controlled flow of both air and media with propellant energy added at appropriate points resulting in less energy loss and media damage.
Figure 5 shows the media feed equipment for a batch pressure pot blast system as shown in Figure 1. The particle media is fed into hopper 65 and then to surge vessel 66. A
compressed air input is taken from a supply through air flow control valves 67 which is item 7a of Figure 1 and 68 which forms items 5a and 5b of Fiyure 1 into fluidizer 69. The feed passes to metering pump 70 which is item ~ of Figure 1 connected to variable speed drive (4a of figure 1) and to fluidizer/accelerator 71 having compressed air inputs 71a and 71b. Output from the Eluidizer/accelerator is piped to the blast head.
Figure 6 shows the fluidizer/accelerator assembly as shown in Figure 5 (Item 71). Controlled, metered blast head media from the metering pump enters at 72 and is accelerated by a controlled, metered air input to jet nozzle 73. Fluid-izing air (metered and controlled) is injected at 7~1 and further fluidizes and accelerates the air/particle media - 25 stream with the output being piped -to the blast head.
Figure 7 shows a single stage fluidizer/accelerator of a type that could be used in Figure 2 (Item 6) with the non or partially fluidized media stream (metered and controlled) entering at 75 and a metered, controlled air stream injected at 76. This flow passes into annular distributing chamber 77 through a gap formed by pressure O-ring seal 78 into the venturi shaped interior to form a fluidizing, accelerating stream. The output provides a fluidized and accelerated air stream, controlled and metered to a required degree for trans-port, conveying and work energy to the blast head.
Figure 8 is a two stage accelerator/fluidizer similar to that of Figure 7 bu-t for ~ore precise control of conditions, having a second air input at 76a passing into the interior .
~7~ ~2~8 via annular distributing chamber 77a and the gap formed by O-ring seal 78a. This device ~orms the blast heads shown in Figures 3 and 4 ~Items 34, 34a and 34b).
A mobile version of the system is shown in Figure 9 with the air supply portion in Figure 10 and the refriger-ation and ice supply portion shown in Figure 11. Power plant 80 drives compressor 81 drawing ambient air frolll air intake 82 and sending it via line 83 to air cooler 84.
The air is then passed through condensate trap 84a to air - 10 xeservoir 85 having condensate trap 86, through air filter ~7 and dryer 88 and through air filter 89 to control valves 90.
The power plant also drives refrigeration plant 91 to provide refrigerant for ice making and cooling the ice process components. Water from tanks 92 passes through deaerator 93, and precooler 94 to ice maker and sizer g5.
The ice is crushed in crusher 9~ and passed to metering device 97 and fluidizer 98 which also has an air input from control valves 90 to direct a fluidized ice-air stream via line 99 to the blast heads. As shown, two compressed air Elows are taken from valves 90 via lines 100a and 100b.
Other elements shown are refrigerant cooler 101, engine cooler 102, fuel tank 103, control room 104 and control panel 105 (Figure 10).
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Claims (14)
1. A method of particle blast cleaning and treating of surfaces comprising:
a) metering a flow of particles from a supply, b) positively feeding the particle flow from the meter-ing stage into a mixer or fluidizer, c) fluidizing the particle flow with a controlled, metered flow of fluid taken from a pressurized fluid source, d) pneumatically conveying a particle-fluid stream from the fluidizing stage to a blast head, and e) controlling the fluid flow rates and the particle amount rates and the mass flow ratios of the two flows precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
a) metering a flow of particles from a supply, b) positively feeding the particle flow from the meter-ing stage into a mixer or fluidizer, c) fluidizing the particle flow with a controlled, metered flow of fluid taken from a pressurized fluid source, d) pneumatically conveying a particle-fluid stream from the fluidizing stage to a blast head, and e) controlling the fluid flow rates and the particle amount rates and the mass flow ratios of the two flows precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
2. A method of particle blast cleaning and treating of surfaces as in Claim 1 further comprising piping at least one high pressure controlled fluid stream from a pressurized fluid source to the blast head to interact with the particle-fluid stream to provide a particle blast for surface cleaning and treating purposes.
3. A method of particle blast cleaning and treating of surfaces as in Claim 1 or in Claim 2 wherein the particle material is a frozen liquid.
4. A method of particle blast cleaning and treating of surfaces as in Claim 1 or Claim 2 wherein the treating material is of the group: plastic chips, glass beads, nut shells, sand, gritty materials.
5. A method of particle blast cleaning and treating of surfaces comprising:
a) grinding, crushing or sizing a supply of particle material to a controlled particle size, b) metering a flow of particles from the grinding/
crushing/sizing stages, c) positive feeding this particle flow into a fluid-izer, d) fluidizing the particle flow with a metered flow of air taken through an air flow control valve from a compressed air source, e) pneumatically conveying a fluidized particle-air stream from the fluidizing stage to a particle blast head, and f) controlling the air flow rates and the particle amount rates and the mass flow ratios of two flows precisely and other fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
a) grinding, crushing or sizing a supply of particle material to a controlled particle size, b) metering a flow of particles from the grinding/
crushing/sizing stages, c) positive feeding this particle flow into a fluid-izer, d) fluidizing the particle flow with a metered flow of air taken through an air flow control valve from a compressed air source, e) pneumatically conveying a fluidized particle-air stream from the fluidizing stage to a particle blast head, and f) controlling the air flow rates and the particle amount rates and the mass flow ratios of two flows precisely and other fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
6. A method of particle blast cleaning and treating of surfaces as in claim 5 further comprising piping at least one pressurized air stream from a compressed air source through a flow control valve to the blast head to interact with the particle-air stream to provide particle blast for surface cleaning and treating purposes.
7. A method of particle blast cleaning and treating of sur-faces as in claim 5 or claim 6 wherein the treating material is a frozen liquid.
8. A method of particle blast cleaning and treating of surfaces as in claim 5 or claim 6 wherein the treating material is of the group: plastic chips, glass beads, nut shells, sand and other gritty materials.
9. A method of particle blast cleaning and treating Of surfaces comprising:
a) forming a supply of ice by refrigeration, b) grinding or crushing this ice supply to a controlled particle size, c) metering by means of a positive displacement means a flow of ice particles from the grinding or crushing stage and feeding this flow into a fluidizer, d) fluidizing the ice particle flow with a metered flow of air taken through an air flow control valve from a com-pressed air supply source, e) pneumatically conveying and accelerating a fluidized ice particle-air stream from the fluidizer to an ice particle blast head, and f) controlling the air flow rates and the ice particle amount rates and the mass flow ratios of the two flows precisely and over fairly wide ranges to provide an ice particle blast cleaning and treating effect for a wide range of surfaces and objects.
a) forming a supply of ice by refrigeration, b) grinding or crushing this ice supply to a controlled particle size, c) metering by means of a positive displacement means a flow of ice particles from the grinding or crushing stage and feeding this flow into a fluidizer, d) fluidizing the ice particle flow with a metered flow of air taken through an air flow control valve from a com-pressed air supply source, e) pneumatically conveying and accelerating a fluidized ice particle-air stream from the fluidizer to an ice particle blast head, and f) controlling the air flow rates and the ice particle amount rates and the mass flow ratios of the two flows precisely and over fairly wide ranges to provide an ice particle blast cleaning and treating effect for a wide range of surfaces and objects.
10. A method of particle blast cleaning and treating of surfaces as in Claim 9 further comprising piping at least one metered and controlled air stream from a compressed air supply source through a control valve to the blast head input line to interact with and accelerate to the ice particle-air stream.
11. Particle blast cleaning and treating equipment comprising:
a) means for metering a flow of particles from a supply, b) positive displacement means connected to the out-put of the metering device to provide a controlled, metered flow of particles to an output, c) a fluidizer connected to the output of the positive displacement means and to a pressurized source of metered, controlled fluid for fluidizing the the particle flow and to provide a positive-fluid stream to an output, d) a blast head connected via a piping line to the output of the fluidizer for providing a cleaning and treating particle-fluid blast to a workpiece surface, and e) control means connected to the metering means, the positive displacement means and the fluidizer to control the particle and fluid flow rates and the mass flow rates of the two streams precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
a) means for metering a flow of particles from a supply, b) positive displacement means connected to the out-put of the metering device to provide a controlled, metered flow of particles to an output, c) a fluidizer connected to the output of the positive displacement means and to a pressurized source of metered, controlled fluid for fluidizing the the particle flow and to provide a positive-fluid stream to an output, d) a blast head connected via a piping line to the output of the fluidizer for providing a cleaning and treating particle-fluid blast to a workpiece surface, and e) control means connected to the metering means, the positive displacement means and the fluidizer to control the particle and fluid flow rates and the mass flow rates of the two streams precisely and over fairly wide ranges to provide a particle blast cleaning and treating effect for a wide range of surfaces and objects.
12. Particle blast cleaning and treating equipment as in Claim 11 further comprising at least one piping means connected to a high pressure source of fluid and to the blast head for providing an accelerating effect to the fluid-particle stream in the blast head.
13. Particle blast cleaning and treating equip-ment as in Claim 11 or Claim 12 when the treating particles are of the group: plastic chips, glass beads, nut shells, sand, gritty materials and further comprising grinding/crushing/sizing means for preparing the particles for feeding a supply to the metering means.
14. Particle blast cleaning and treating equip ment as in Claim 11 or Claim 12 wherein the treating particles are frozen liquid pellets and further comprising refrigeration means and grinding and crushing means for preparing the ice particles for feeding a controlled supply to the metering means.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000601142A CA1321478C (en) | 1989-05-30 | 1989-05-30 | Particle blast cleaning and treating of surfaces |
| PCT/CA1990/000174 WO1990014927A1 (en) | 1989-05-30 | 1990-05-29 | Particle blast cleaning and treating of surfaces |
| AU56622/90A AU5662290A (en) | 1989-05-30 | 1990-05-29 | Particle blast cleaning and treating of surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000601142A CA1321478C (en) | 1989-05-30 | 1989-05-30 | Particle blast cleaning and treating of surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1321478C true CA1321478C (en) | 1993-08-24 |
Family
ID=4140123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000601142A Expired - Fee Related CA1321478C (en) | 1989-05-30 | 1989-05-30 | Particle blast cleaning and treating of surfaces |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU5662290A (en) |
| CA (1) | CA1321478C (en) |
| WO (1) | WO1990014927A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4302893A (en) * | 1992-06-01 | 1993-12-30 | Ice Blast International Ltd. | Particle blasting utilizing crystalline ice |
| NL9301237A (en) * | 1993-07-14 | 1995-02-01 | Harko Bv | Method for treating surfaces with cryogenic particles |
| WO1995022432A1 (en) * | 1994-02-21 | 1995-08-24 | Waterkracht B.V. | Blasting device with adjustable blast strength |
| US5853493A (en) * | 1997-08-22 | 1998-12-29 | Albany International Corp. | Cleaning of industrial fabrics using cryoblasting techniques |
| ES2332069T3 (en) * | 2007-04-05 | 2010-01-25 | Rosa Rotstein | DEVICE AND PROCEDURE FOR SURFACE HANDLING OR SURFACE TREATMENT THROUGH A DRY ICE GRANULATE. |
| US9050184B2 (en) | 2008-08-13 | 2015-06-09 | Allergan, Inc. | Dual plane breast implant |
| EP2343157A1 (en) * | 2010-01-08 | 2011-07-13 | TQ-Systems GmbH | Processing machine or device for dry ice |
| US9205577B2 (en) | 2010-02-05 | 2015-12-08 | Allergan, Inc. | Porogen compositions, methods of making and uses |
| US11202853B2 (en) | 2010-05-11 | 2021-12-21 | Allergan, Inc. | Porogen compositions, methods of making and uses |
| US8506361B2 (en) * | 2011-08-25 | 2013-08-13 | General Electric Company | Fixture to facilitate sandblasting of a cylindrical object |
| EP2962662A1 (en) | 2012-12-13 | 2016-01-06 | Allergan, Inc. | Variable surface breast implant |
| US10092392B2 (en) * | 2014-05-16 | 2018-10-09 | Allergan, Inc. | Textured breast implant and methods of making same |
| DE102016100243A1 (en) * | 2016-01-08 | 2017-07-13 | Rehau Ag + Co. | Method for painting automotive plastic components |
| EP3814050A4 (en) * | 2018-06-26 | 2022-03-09 | Coulson Ice Blast Ltd. | Ice blasting machine with dual-mode operation for water ice and dry ice |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE168849C (en) * | ||||
| BE648487A (en) * | ||||
| US2108545A (en) * | 1934-10-20 | 1938-02-15 | American Foundry Equip Co | Low pressure abrasive blast system |
| GB907937A (en) * | 1959-10-21 | 1962-10-10 | Vacu Blast Ltd | Fluidization and feeding of finely divided materials |
| GB958759A (en) * | 1962-11-02 | 1964-05-27 | Vacu Blast Ltd | Improvements in or relating to abrasive blasting apparatus |
| GB1397102A (en) * | 1972-03-22 | 1975-06-11 | Carrier Drysys Ltd | Abrasive treatment of a surface of a metal substrate |
| GB1432351A (en) * | 1972-06-23 | 1976-04-14 | Brooker Ltd W J | Cleaning of metal building material and like surfaces |
| US3858358A (en) * | 1973-01-02 | 1975-01-07 | American Aero Ind | High pressure liquid and abrasive cleaning apparatus |
| US4048757A (en) * | 1976-08-16 | 1977-09-20 | Union Carbide Corporation | System for metering abrasive materials |
| GB2075879B (en) * | 1980-05-16 | 1983-04-07 | Link John | Cleaning apparatus and method |
| GB2077158A (en) * | 1980-06-07 | 1981-12-16 | Wood Group Structural Coatings | Wet grit blasting |
| US4389820A (en) * | 1980-12-29 | 1983-06-28 | Lockheed Corporation | Blasting machine utilizing sublimable particles |
| EP0086616A1 (en) * | 1982-02-12 | 1983-08-24 | Industrial Chemical Cleaners (Hull) Limited | Wet blasting apparatus |
| GB2128911B (en) * | 1982-10-22 | 1986-04-16 | Shiftworker Limited | Sand blasting apparatus |
| GB8324553D0 (en) * | 1983-09-14 | 1983-10-19 | Btr Plc | Monitoring flow of particulate material in impact treatment equipment |
| US4630410A (en) * | 1983-12-06 | 1986-12-23 | Westinghouse Electric Corp. | Reactor vessel stud cleaning machine |
| GB2153717B (en) * | 1984-02-09 | 1987-02-25 | Water Res Centre | Providing high pressure abrasive jets |
| GB8425539D0 (en) * | 1984-10-10 | 1984-11-14 | Brent Chemicals Int | Abrading surfaces |
| FR2576821B1 (en) * | 1985-02-04 | 1987-03-27 | Carboxyque Francaise | PLANT FOR SPRAYING CARBONIC ICE PARTICLES |
| FR2581324B1 (en) * | 1985-05-03 | 1988-07-15 | Porte Michel | DEVICE FOR PROVIDING A REGULAR FLOW SPRAY OF POWDERY PRODUCTS OF VERY FINE GRANULOMETRY AND ITS DIFFERENT APPLICATIONS IN PARTICULAR FOR ABRASIVE PRODUCTS |
| DE3533667A1 (en) * | 1985-09-20 | 1987-04-02 | Schlick Roto Jet Masch | Apparatus for the uniform metering of granular abrasive in pneumatically operating abrasive-blasting plants |
| US4693102A (en) * | 1985-11-05 | 1987-09-15 | Metal Improvement Co., Inc. | Shot-peening method |
| JPS62208872A (en) * | 1986-03-11 | 1987-09-14 | Taiyo Sanso Kk | Fine frosen grain housing equipment |
| US4744181A (en) * | 1986-11-17 | 1988-05-17 | Moore David E | Particle-blast cleaning apparatus and method |
| US4769956A (en) * | 1987-09-02 | 1988-09-13 | Engineered Abrasives, Inc. | Abrasive cleaning and treating device |
| DE3738246A1 (en) * | 1987-11-11 | 1989-05-24 | Werner & Zeisse Gmbh & Co | METHOD AND DEVICE FOR REMOVING COATINGS AND IMPURITIES |
| US4805429A (en) * | 1987-12-28 | 1989-02-21 | General Electric Company | Shot peening system and method with velocity sensing |
| CH674096A5 (en) * | 1988-01-19 | 1990-04-30 | Lonza Ag |
-
1989
- 1989-05-30 CA CA000601142A patent/CA1321478C/en not_active Expired - Fee Related
-
1990
- 1990-05-29 AU AU56622/90A patent/AU5662290A/en not_active Abandoned
- 1990-05-29 WO PCT/CA1990/000174 patent/WO1990014927A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990014927A1 (en) | 1990-12-13 |
| AU5662290A (en) | 1991-01-07 |
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Legal Events
| Date | Code | Title | Description |
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| MKLA | Lapsed |