GB2403226A - Method and apparatus for pickling and passivating metal fabrications - Google Patents
Method and apparatus for pickling and passivating metal fabrications Download PDFInfo
- Publication number
- GB2403226A GB2403226A GB0315188A GB0315188A GB2403226A GB 2403226 A GB2403226 A GB 2403226A GB 0315188 A GB0315188 A GB 0315188A GB 0315188 A GB0315188 A GB 0315188A GB 2403226 A GB2403226 A GB 2403226A
- Authority
- GB
- United Kingdom
- Prior art keywords
- passivating
- pickle
- fluid
- pickling
- acid
- 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.)
- Granted
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 7
- 239000002184 metal Substances 0.000 title claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 42
- 239000002253 acid Substances 0.000 claims description 31
- 235000021110 pickles Nutrition 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 10
- 238000010410 dusting Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 7
- 239000002344 surface layer Substances 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 238000010276 construction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000950638 Symphysodon discus Species 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- HOQADATXFBOEGG-UHFFFAOYSA-N isofenphos Chemical compound CCOP(=S)(NC(C)C)OC1=CC=CC=C1C(=O)OC(C)C HOQADATXFBOEGG-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920002449 FKM Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000003482 Pinner synthesis reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 238000003339 best practice Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910001293 incoloy Inorganic materials 0.000 description 1
- 229910001119 inconels 625 Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
- B05B1/1627—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
- B05B1/1663—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative translatory movement of the valve elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction, i.e. creating a spinning torque due to a tangential component of the jet
- B05B3/066—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction, i.e. creating a spinning torque due to a tangential component of the jet the movement of the outlet elements being a combination of two movements, one being rotational
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A method and apparatus 100 for pickling and passivating metal fabrications where pickling and passivating fluids are alternately sprayed at an elevated pressure in and around the inside of metal containers or ducting. The used pickling/passivating fluid and released debris is drained after the pickling and passivating stages respectively. A gearless turbine is used to control speed of delivery and a piston controlled separator 110 to alternate between the pickling and passivating phases. The apparatus can also comprise means for monitoring and controlling the apparatus remotely.
Description
1 2403226 A METHOD OF, AND APPARATUS FOR,
PICKLING AND PASSIVATING METAL CONTAINERS AND OTHER
FABRICATIONS
This invention relates to a method of, and apparatus for, pickling and passivating metal containers and other fabrications such as bulk storage tanks or tankers or ducting using a piston-controlled separator in a gearless spinner.
Tank, tanker and ducting manufacturers, owners and operators currently use cleaning devices - referred to as spinners - to spray pickle acids under pressure at welds and other accretions or areas in which bacteria or other harmful organisms can hide and multiply, in order that such accretions or organisms can be dissolved and removed, and by spraying water under pressure to neutralize the acid and to remove the pickle acid and dissolved material and passivate the construction allowing it to be used for the purpose intended.
The s pinners, because of the materials used and method of construction, do not withstand the aggressive effects of the chemicals used in the pickling process. For example, if a stainless steel tank is to be pickled and the spinner contains parts such as bearings and gears which can degrade rapidly from contact with chemicals such as < 5% Hydrofluoric Acid and <20% Nitric Acid or < 25% Sulphuric Acid contained in the pickle then the working life of the spinner is reduced. If, on the other hand, the spinner can be made wholly or mainly from materials which can, in the main, withstand the aggressive effects of the chemicals used then an economic advantage may be obtaired from the use of such spinner. Due to the current methods of construction, the weakest internal parts of the spinner are the gears, bearings and seals. By eliminating the gears, replacing vulnerable bearings with bushes and using appropriate seals then the weaknesses of construction of conventional models can be overcome, with a result that pickling costs can be reduced because the working life of the spinner is increased substantially. Further, best practice stipulates that pickle-acids are applied at a different pressure and flow compared with the application of passivating fluid to remove pickle acids and passivate the tank. By including a piston in the main bore of the body/rotor block which responds to different pressures different rotor attachments can be deployed for the different phases - pickling and passivating - to provide the desired flows and pressures for the job to be done from the same spinner assembly. To overcome the disadvantages and to be able to obtain the advantages and desired economies in operation the apparatus to be specified can be deployed in such environments.
According to one aspect of the present invention there is provided a method of pickling and passivating metal fabrications comprising the steps of: a. spraying pickle-acid fluid at an elevated pressure in and around the inside of open-topped or enclosed containers or dusting, and after b. draining the used pickle-acid fluid and released debris from such containers or dusting, then c. spraying passivating fluid at a different elevated pressure in and around the inside of such containers or ducting through d. a spinner, which utilizes a gear-less turbine to control speed of delivery and e. piston-controlled separator to distinguish between the pickling and passivating phases, before finally f. draining the used passivating fluid and released debris from such containers or ducting.
Preferred and/or optional features of the first aspect of the invention are set out in claims 2 to 6.
According to another aspect of the present invention there is provided apparatus for performing the method according to the first aspect of the invention comprising means for spraying pickle-acid fluid and different means for spraying passivating fluid into and around f abrications such as open-topped or enclosed containers or dusting which utilizes a gear- less turbine to control speed of delivery, and piston-controlled separator to distinguish between the pickling and passivating phases.
to Preferred and/or optional features of said another aspect of the invention are set out in claims 8 to 12.
A preferred pickle is formulated by AvestaPolarit Oyy Abp, PO Box 270, FIN-02601, ESPOO, Finland for use with stainless steel and recommended materials to be used in the manufacture of the spinner and which come into contact with the pickle are Viton, PTFE, Acetal, Nylon, Inconel 625 or Incoloy 825 or Titanium Preferably, the apparatus comprises rotors with a plurality of nowles where the flow to the rotors is controlled by piston reacting to pressure of fluid being pumped, and the fluid flowing through outlet nozzles on the components can cause rotors to rotate - for example - in a vertical plane and body of the spinner to rotate in a horizontal plane without the need for gears to transfer the drive from the one plane to the other.
A preferred embodiment of the apparatus is summarized as a multi-nozled spinner or rotor which is releasably secured to a pump and driven by a flow of pickle-acid or passivating fluid pumped under pressure from a pump. The pump may be either part of cleaning-in-place (CIP) setting to the fabrication to be cleaned or external to the fabrication - depending on circumstances applying at site of operation. The force of the pumped fluids delivered through outlet nozles located at specific points and angles on, along or around the circumference of a rotor block or outlets attached to the rotor block causes the rotor block to rotate in controlled manner and rotors attached to different outlets attached to the rotor block to be operated by changing the pressure of flow into the rotor block which cause a piston to move to cover/uncover selected ports in reaction to the change in fluid pressure allowing fluid to flow through uncovered ports then out through nozles attached to rotors and rotor block.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawings in which: Figure 1 shows details of the spinner assembly with piston allowing flow through upper outlets only.
Figure 2 shows details of the spinner assembly with piston allowing flow through lower outlets only.
Figure 3 shows 3D projection of spinner Figure 4 shows embodiment of apparatus as a tractor Referring to the drawing the apparatus shown therein comprises a block 100 releasably attached at 105 to rotateable inlet connector (not shown) with outlet assemblies 125U and 125D, outlet ports 115U and 115D, piston 110, shutter 111, annulus 112, piston spring 117, outlet nozles 135U on or around rotor arm or disc 130U and outlet nozles 135D on or around rotor arm or disc 130D. Right-angle nozles (not shown) are releasably attached at positions 116U and 116D.
The method for using the apparatus will now be described envisaging, by way of examples, (a) the pickling of all surfaces of an enclosed fabrication followed by (b) the passivation of the pickled surfaces of such fabrication, (c) assembled as a tractor to travel along ducting with ability to pickle and passivate as well as move forward and backward. The pressures referred to are by way of example as, in practice, the range of pressure used will depend on the parameters of construction.
(a) Assume that it is desired to pickle a tank with a flow rate delivered by pump (not shown) at about 35 psi or 2.5 Bar and that with piston spring 117 supporting piston 110 in such a position in the bore of rotor block 100 that the flow of pickle acid into the space contained by piston shutter 111 and head of piston 110 will pass through holes in an annulus 112 between the shutter 111 and head of piston 110 thus allowing the flow of pickle to be diverted through port 125U of to outlet assembly 120U and into the rotor 130U and nozzles 135U and also allowing some pickle-acid to be diverted through port 115U in rotor block 100 and through a rightangled nozzle (not shown) releasably attached to the periphery of rotor block at 116U to provide sufficient thrust for rotor block 100 to rotate at a controllable speed around the inlet connection (not shown).
lS (b) Assume that it is desired to passivate a pickled tank with water delivered at about 150 psi or 10.0 Bar; the effect of the pressure increase above 35 psi or 2.5 Bar on piston 110 will cause piston spring 117 supporting piston 110 to react to the pressure by compressing with the effect that the piston assembly of piston head, annulus and shutter will move down the bore of rotor block 110 and with the effect of closing-off flow through outlets 115U and 125U and opening-up the outlets 115D and 125D respectively. Whilst such higher pressure is maintained to compress piston spring 117 supporting piston 110 in such a position in the bore of rotor block 100 allowing passivating fluid to flow into the space contained by piston shutter 111 and head of piston 110 to pass through holes in an annulus 112 between the shutter 111 and head of piston 110 thus allowing the flow of passivating fluid to be diverted through port 125D of outlet assembly 120D and into the rotor 130D and nozles 135D and also allowing some passivating fluid to be diverted through port 115D in rotor block 100 and through a right-angled nozle (not shown) releasably attached to the periphery of rotor block at 116D to provide sufficient thrust for rotor block 100 to rotate at a controllable speed around the inlet connection (not shown).
(c) Assume it is desired to pickle then passivate along or across a fabrication then the components can, as shown in Figure 4, be assembled as an hydraulically powered tractor where a flow delivered by pump (not shown) at about 35 psi or 2.5 Bar can be converted into traction energy as well as undertaking the pickling process whereby piston spring 117 supporting piston 110 in such a position in the bore of block 100 that the flow of pickle-acid or passivating fluid into the space contained by piston shutter 111 and head of piston 110 will pass through holes in an annulus 112 between the shutter 111 and head of piston 110 thus allowing the flow of pickle to be diverted through ports 125U of outlet assemblies 120U and into rotors 130U and nozles 135U. Reverse traction is achieved by increasing pressure above 35 psi or 2.5 Bar on piston 110 to cause piston spring 117 supporting piston 110 to react to the pressure by compressing with the effect that the piston assembly of piston head 110, annulus 112 and shutter 111 will move down the bore of block 110 and with the effect of closing-off flow through outlets 125U and opening-up the outlets 125D respectively. Whilst such higher pressure is maintained to compress piston spring 117 supporting piston in such a position in the bore of block 100 allowing fluid to flow into the space contained by piston shutter 111 and head of piston 110 to pass through holes in an annulus 112 between the shutter 111 and head of piston 110 thus allowing the flow of pickle or passivating fluid to be diverted through ports 125D of outlet assemblies 120D and into rotors 130D and nozles 135D.
The method for using the apparatus will now be described envisaging A. a circumstance in which a tank is to be pickled and passivated B. a circumstance in which ducting is to be pickled and passivated using the apparatus in tractor mode With circumstance A, to pickle and passivate all internal surfaces and welds of a tank a spinner will need to be located in a position so that the effective throw-distance of the jet - that is, the distance before the jet of fluid breaks up into disconnected splashes - of pickle-acid fluid will reach and coyer al I s urfaces end w eldsto be p ickled at the minimum effective pressure from a spinner with appropriately tensioned piston spring I 117 for such pressure. Speed of rotation of rotor block 100 in horizontal plane and discus 130U in vertical plane can be controlled by the aperture size and angle of thrust created by the flow of pickle-acid fluid through right-angled nozle (not shown) releasably attached at port 116U and nozles 135U respectively. After application of pickle-acid, recycling of pickle acid and surface material or debris starting to be released and waiting time for the acid to take effect to remove the planned amount of surface material, passivating fluid and released surface material or debris in passivating fluid can be pumped at higher pressure and different flow rate by causing piston-spring 117 to compress with the effect that ports 115U and 125U are closed and ports 115D and 125D are opened with the effect that the speed of rotation of rotor block 100 in horizontal and plane and discus 130D in vertical plane can be controlled by the aperture size and angle of thrust created by the flow of passivating fluid through right angled nozle (not shown) releasably attached at port 116D and nozles 135D respectively.
With circumstance B. to pickle and passivate all internal surfaces and welds of ducting I a spinner will need to be located on a tractor which can travel along the duct as it is applying pickle-acid or passivating fluids in either direction. This is achieved with 8( appropriately tensioned piston spring 117 which reacts to the fluid pressure to be able to cover or uncover the appropriate ports to achieve the pickling or passivating and travel in desired direction. As a tractor the block 100 housing the piston will not need to rotate. The discii 130UT and 130DT perform the functions of traction wheels and the discii 130U and 130D deliver the pickle-acid or passivating fluid as required. Speed and direction of rotation of all discii 130U, 130UT, 130D and 130DT can be controlled by the aperture size and angle of thrust created by the flow of pickle-acid or passivating fluids through nozzles 135U and 135D as appropriate. After application of pickle-acid and pickle acid and surface material or debris and waiting time for the acid to take effect to remove the planned amount of surface material, water and water and dissolved surface material and debris as passivating fluid can be pumped at higher pressure and different flow rate by causing piston-spring 117 to compress with the effect that ports 125U are closed and ports 125D are opened with the effect that the return journey can be made through thrust derived from traction wheels 130DT as passivation takes place through discus 130D; the speeds of rotation being controlled by the aperture size and angle of thrust created by the flow of passivating fluid through nozzles 135D.
The methods and apparatus described above are given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention as defined and appended claims.
Claims (11)
1. A method of pickling and passivating metal fabrications, comprising the steps of: a. spraying pickle-acid fluid at an elevated pressure in and around the inside of open-topped or enclosed containers or dusting, and after b. draining the used pickle-acid fluid and released debris from such containers or ducting, then c. spraying passivating fluid at a different elevated pressure in and around the inside of such containers or ducting through d. a spinner, which utilizes a gear-less turbine to control speed of delivery and e. piston-controlled separator to distinguish between the pickling and passivating phases, before finally f. draining the used passivating fluid and released debris from such containers orducting.
2. A method as claimed in 1, wherein step a. is carried out on a continuous basis until such time as it is estimated sufficient material has been removed from the surface being processed.
3. A method as claimed in 1, wherein step c. is carried out on a continuous basis until such time as it is estimated that acid has been neutralized, debris removed, the surface being processed is passivated.
4. A method as claimed in 1, wherein step e. utilizes a piston to separate flows for the different phases of pickling and passivating.
5. A method as claimed in 1, wherein the elevated and different elevated pressures operate within safety range limits of the apparatus.
6. A method as claimed in any one of the preceding claims, wherein the pickle is formulated from a blend of chemicals appropriate for the surface being processed.
7. Apparatus for performing the method as claimed in any one of the preceding S claims comprising means for spraying pickle acid and dissolved surface layer and other debris, means for removing the used pickle acid from the fabrication, means for spraying passivating fluid and dissolved surface layer and other debris, means for removing the used passivating fluid from the fabrication, means for making the switch between pickle phase and passivating phase remotely, means for controlling the speeds of operation of different phases of operation independently.
8. Apparatus as claimed in 7, wherein the means for spraying the pickle acid and dissolved surface mixture, and passivating fluid and dissolved surface mixture comprises a rotor block with a plurality of rotors through which the pickle acid and dissolved mixture and passivating fluid and dissolved surface mixture can be selectively directed.
9. Apparatus as claimed in 8, wherein the means for traversing along or across a surface comprises a block with multiple adjacent pairs of rotors providing traction through which pumped pickle acid and dissolved surface mixture, and passivating fluid and dissolved surface mixture can be selectively directed to obtain forward or backward motion.
10. Apparatus as claimed in 8 and 9, wherein the pickling and passivating phases and traction abilities are combined in the same apparatus. !
11. Apparatus as claimed in 10, wherein pickling with traction, and passivating with traction operate through connected rotors independently.
Apparatus as claimed in 7 to 11, wherein the flows for the different phases are controlled by a piston reacting to changes in operating pressures to open or close ports as appropriate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0315188A GB2403226B (en) | 2003-06-28 | 2003-06-28 | A method of and apparatus for pickling and passivating metal cntainers and other fabrications. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0315188A GB2403226B (en) | 2003-06-28 | 2003-06-28 | A method of and apparatus for pickling and passivating metal cntainers and other fabrications. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0315188D0 GB0315188D0 (en) | 2003-08-06 |
| GB2403226A true GB2403226A (en) | 2004-12-29 |
| GB2403226B GB2403226B (en) | 2006-11-22 |
Family
ID=27676295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0315188A Expired - Fee Related GB2403226B (en) | 2003-06-28 | 2003-06-28 | A method of and apparatus for pickling and passivating metal cntainers and other fabrications. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2403226B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465575B (en) * | 2018-02-21 | 2020-09-04 | 福州合农农业科技有限公司 | Geological disaster rescue epidemic prevention is with spouting medicine equipment fast |
| CN108262186B (en) * | 2018-03-13 | 2020-09-04 | 福州普来尔电器有限公司 | Medicine equipment is spouted in wide range epidemic prevention in geological disaster earthquake district |
| CN114293197A (en) * | 2021-12-31 | 2022-04-08 | 中国二十二冶集团有限公司 | Pipeline pickling and passivating system and using method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3989070A (en) * | 1974-04-26 | 1976-11-02 | Jonkopings Mekaniska Werkstads Ab | System for and method of carrying out wash-draining, after-draining and the like |
| EP0645191A2 (en) * | 1993-08-26 | 1995-03-29 | SPRAYING SYSTEMS DEUTSCHLAND GmbH & Co. KG | Nozzle |
-
2003
- 2003-06-28 GB GB0315188A patent/GB2403226B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3989070A (en) * | 1974-04-26 | 1976-11-02 | Jonkopings Mekaniska Werkstads Ab | System for and method of carrying out wash-draining, after-draining and the like |
| EP0645191A2 (en) * | 1993-08-26 | 1995-03-29 | SPRAYING SYSTEMS DEUTSCHLAND GmbH & Co. KG | Nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2403226B (en) | 2006-11-22 |
| GB0315188D0 (en) | 2003-08-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20100628 |