WO2010094062A1 - Fluid blasting apparatus - Google Patents
Fluid blasting apparatus Download PDFInfo
- Publication number
- WO2010094062A1 WO2010094062A1 PCT/AU2010/000170 AU2010000170W WO2010094062A1 WO 2010094062 A1 WO2010094062 A1 WO 2010094062A1 AU 2010000170 W AU2010000170 W AU 2010000170W WO 2010094062 A1 WO2010094062 A1 WO 2010094062A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- stem
- drive shaft
- rotation axis
- head assembly
- Prior art date
Links
Classifications
-
- 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
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
-
- 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
- B08B9/0936—Cleaning containers, e.g. tanks by the force of jets or sprays using rotating jets
Definitions
- Oil refineries process and refine crude oil into numerous petroleum products such as liquid petroleum gas (LPG), petrol (gasoline), kerosene, diesel oil, fuel oil, asphalt base, lubricating oil and paraffin wax.
- LPG liquid petroleum gas
- petrol gasoline
- kerosene diesel oil
- fuel oil asphalt base
- lubricating oil paraffin wax
- the crude oil is heated in a furnace and the various petroleum products are separated by fractional distillation based on the differing boiling points of the petroleum products.
- the longer-chain hydrocarbon molecule products, such as fuel oil have lower boiling points than the shorter-chain hydrocarbon molecule products, such as LPG.
- Fluid catalytic cracking is a process used to crack low-value, long-chain hydrocarbon molecules into high-value, short-chain hydrocarbon molecules that are used in petrol and LPG production.
- the process typically uses a hot zeolite-based catalyst (at around 700 0 C) which is mixed with a pre-heated oil feed in the base of a riser.
- the hot catalyst vaporises the oil and catalyses the cracking reactions that break down the long-chain hydrocarbon molecules as the mixture flows up the riser.
- coke a carbonaceous material
- the coke-impregnated refractory lining also becomes exceptionally hard (in the order of 150MPa), making it extremely difficult to remove.
- the coke-impregnated refractory lining is too hard to remove effectively by jack hammering and consequently, entire sections of the fluid catalytic cracking unit must be cut away and replaced. This process is prohibitively expensive and also involves long shutdown periods.
- the path of the stem about the rotation axis generally describes a conical surface.
- Fig. 2 is a top view of the fluid blasting apparatus of Fig. 1;
- Fig. 3 is a side view of a head assembly of the fluid blasting apparatus of Fig. 1;
- Fig. 5 is a sectional side view of the head assembly, taken through plane BB.
- a fluid blasting apparatus 10 is depicted in the drawings.
- the apparatus 10 is used to support, control and direct a high pressure liquid jet for removing a coke layer from the surface of a refractory material.
- the apparatus 10 includes a frame 12.
- the frame 12 is fabricated as a rigid metal structure or truss, capable of withstanding considerable forces.
- the frame 12 may be mounted to a heavy vehicle or crane, or alternatively secured to a larger structure, such as a concrete slab or wall.
- the apparatus 10 includes a nozzle 30 mounted to the head assembly 14.
- the nozzle 30 is best depicted in Fig. 3.
- the nozzle 30 has a stem or lance 32 extending along a longitudinal axis XX, and the nozzle has a nozzle tip 34, capable of ejecting water or other fluids at high pressure.
- the head assembly 14 includes a continuous drive means 40, in the form of a chain or belt drive 42.
- the continuous drive means 40 is adapted to rotate the stem 32 around the rotation axis ZZ, which is oblique to the longitudinal axis XX, such that during a revolution of the stem 32, the path of the nozzle tip 34 generally describes a circle and the path of the stem 32 generally describes a conical surface.
- the belt or chain 42 engages a drive sprocket 44 and a driven sprocket 46.
- the drive sprocket 44 has a smaller diameter than the driven sprocket 46, resulting in a reduction of angular velocity, and an increase in the torque.
- the drive sprocket 44 is powered by a hydraulic drive motor 50, best seen in Hg. 5.
- the driven sprocket 46 is secured to a nozzle drive shaft 60, and the nozzle drive shaft 60 rotates about the rotation axis ZZ during rotation of the driven sprocket 46.
- the nozzle drive shaft 60 is supported on a bearing 68.
- the nozzle drive shaft 60 supports a plate 62 having a front stem bearing 63 which is located eccentric relative to the rotation axis ZZ, such that the front stem bearing 63 rotates around a circular path during rotation of the nozzle drive shaft 60.
- the perpendicular distance between the rotation axis ZZ and the front stem bearing 63 is between about 5mm and 25mm.
- the trailing end 64 of the stem 32 is mounted on a rear stem bearing 66 which is mounted to an external surface of the head assembly 14.
- the rear stem bearing 66 is a self aligning bearing.
- the rear stem bearing 66 is connected to a high pressure hydro blast pipe with hydraulic fittings 70, which receive high pressure water from a pump (not shown).
- the operation of the fluid blasting apparatus 10 will now be described.
- the riser tube is typically between 800mm and 1600mm in diameter, and up to 30 metres in length.
- the fluid blasting apparatus 10 is located within the riser, and anchored to the walls, or another fixed structure within the refinery. High pressure water is then ejected from the nozzle tip 34 at a pressure of at least 120 MPa. In practice, the optimal pressure is between 250 MPa, and 350 MPa, preferably around 300 MPa. However, the nozzle 30 may be operated at pressures as high as 600 MPa.
- the hydraulic motor 50 drives the chain or belt 42, to rotate the nozzle drive shaft 60 about the rotation axis ZZ.
- the stem 32 rotates with the nozzle drive shaft 60.
- the front stem bearing 63 is eccentric relative to the rotation axis ZZ, and the rear stem bearing 66 is located generally on the rotation axis ZZ, the result is that the stem 32 traces out a right circular conic profile.
- the conic profile advantageously means that the water jet is dispensed in a circular pattern, meaning that the portion of the refractory and coke layer which is blasted constantly changes.
- the expansion of the cylinder 16 results in translational movement of the head assembly 14, which moves generally up or down within the riser tube.
- the fluid blasting apparatus 10 can also rotate around a vertical axis, enabling the complete circumference of the internal riser wall to be blasted with water.
- the conical motion of the stem 32 permits the water jet to hit the coke- impregnated refractory material at an angle which is oblique or non-perpendicular to the riser surface. This assists the water jet to contact and hence remove coke and coke- impregnated refractory material from a large surface area of the riser.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coke Industry (AREA)
- Cleaning In General (AREA)
- Nozzles (AREA)
- Soil Working Implements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG2011066016A SG174371A1 (en) | 2009-02-17 | 2010-02-17 | Fluid blasting apparatus |
NZ595187A NZ595187A (en) | 2009-02-17 | 2010-02-17 | A fluid blasting apparatus where the front stem bearing is supported on the nozzle drive shaft and located eccentric to the rotation axis |
AU2010215063A AU2010215063B2 (en) | 2009-02-17 | 2010-02-17 | Fluid blasting apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009900661 | 2009-02-17 | ||
AU2009900661A AU2009900661A0 (en) | 2009-02-17 | Fluid Blasting Apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010094062A1 true WO2010094062A1 (en) | 2010-08-26 |
Family
ID=42633346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2010/000170 WO2010094062A1 (en) | 2009-02-17 | 2010-02-17 | Fluid blasting apparatus |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU2010215063B2 (en) |
MY (1) | MY165877A (en) |
NZ (1) | NZ595187A (en) |
SG (1) | SG174371A1 (en) |
WO (1) | WO2010094062A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3009203A1 (en) * | 2014-10-13 | 2016-04-20 | Gerhan Lease B.V. | Method and device for removing an interior coating from hollow bodies |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836054C1 (en) * | 1988-10-22 | 1990-01-04 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | Rotor nozzle for a high-pressure cleaning appliance |
US5203842A (en) * | 1989-03-17 | 1993-04-20 | Edi Mark | Nozzle device for a high-pressure liquid jet |
US5941458A (en) * | 1997-03-20 | 1999-08-24 | Suttner Gmbh & Co. Kg | Rotor nozzle for a high pressure cleaning device |
-
2010
- 2010-02-17 SG SG2011066016A patent/SG174371A1/en unknown
- 2010-02-17 AU AU2010215063A patent/AU2010215063B2/en not_active Ceased
- 2010-02-17 NZ NZ595187A patent/NZ595187A/en not_active IP Right Cessation
- 2010-02-17 MY MYPI2011004391A patent/MY165877A/en unknown
- 2010-02-17 WO PCT/AU2010/000170 patent/WO2010094062A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836054C1 (en) * | 1988-10-22 | 1990-01-04 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | Rotor nozzle for a high-pressure cleaning appliance |
US5203842A (en) * | 1989-03-17 | 1993-04-20 | Edi Mark | Nozzle device for a high-pressure liquid jet |
US5941458A (en) * | 1997-03-20 | 1999-08-24 | Suttner Gmbh & Co. Kg | Rotor nozzle for a high pressure cleaning device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3009203A1 (en) * | 2014-10-13 | 2016-04-20 | Gerhan Lease B.V. | Method and device for removing an interior coating from hollow bodies |
Also Published As
Publication number | Publication date |
---|---|
SG174371A1 (en) | 2011-10-28 |
AU2010215063B2 (en) | 2016-01-28 |
AU2010215063A1 (en) | 2011-10-06 |
MY165877A (en) | 2018-05-18 |
NZ595187A (en) | 2013-03-28 |
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