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Claims  |
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What is claimed is:
1. A steam generator with a spray lance for cleaning contaminants off a surface of a heat exchange member of the steam generator, said steam generator comprising:
a combustion chamber for burning fuel to generate heat;
fuel supply means for supplying fuel to the combustion chamber;
a first chamber adjacent said combustion chamber for receiving heat generated by combustion from the combustion chamber;
a heat recovery chamber for containing water to be heated by heat generated by combustion;
said heat exchange member being disposed between said first chamber and said heat recovery chamber to transfer heat generated by combustion to water contained in the heat recovery chamber;
said heat exchange member having a first surface in said first chamber and a second surface in said heat recovery chamber and said heat exchange member being configured for transferring heat from said first surface to said second surface;
means for removing contaminants from said first heat exchange surface, said means for removing comprising:
said spray lance, said spray lance having a first end disposed towards said first surface for ejecting fluid under pressure against said first surface and a second end opposite said first end, said spray lance defining an axial direction between
said first and second ends;
means for pivotably mounting said spray lance in a third surface in said first chamber, said third surface being substantially opposite said first surface;
means for supplying fluid under pressure to said spray lance;
means for pivoting said first end of said spray lance relative to said second end of said spray lance to move said first end of said spray lance along at least:
a first substantially linear path; and
a second substantially linear path disposed angularly to said first path to define a plane of movement of said first and second paths said plane of movement being disposed angularly with respect to said axial direction of said spray lance said
means for moving comprising:
first moving means for moving said first end of said spray lance along said first substantially linear path; and
second moving means for moving said first moving means in said plane of movement;
said first moving means comprising:
a first substantially linear member, said first substantially linear member defining said first substantially linear path;
first guide means for being moved along said first substantially linear member, said first guide means comprising means for receiving said first end of said spray lance therein for movement of said spray lance with said first guide means; and
first apparatus for moving said first guide means along said first substantially linear member; and
said second moving means comprising means for moving said first substantially linear member within said plane of movement.
2. The steam generator with a spray lance according to claim 1, wherein said second moving means comprises: a second substantially linear member disposed angularly with respect to said first substantially linear member, said second substantially
linear member defining said second substantially linear path;
second guide means for being moved along said second substantially linear member, said second guide means comprising means for engaging said first substantially linear member for movement of said first substantially linear member along said
second substantially linear member; and
second apparatus for moving said second guide means along said second substantially linear member.
3. The steam generator with a spray lance according to claim 1, wherein:
said first substantially linear member is disposed substantially perpendicularly to said second substantially linear member; and
said first guide means further comprises:
a U-shaped portion having first and second arm members extending therefrom;
first sleeve means for being disposed about said first end of said spray lance, said spray lance being movable axially within said first sleeve means; and
means for pivotably mounting said first sleeve means between said first and second arm members to provide a conical angle of movement for said first sleeve means.
4. The steam generator with a spray lance according to claim 3, wherein:
said first substantially linear member has a first end and a second end;
said second guide means comprises means for engaging said first substantially linear member adjacent the first end of said first substantially linear member;
said second moving means further comprises:
a third substantially linear member disposed parallel to said second substantially linear member;
third guide means for being moved along said third substantially linear member, said third guide means comprising means for engaging said first substantially linear member adjacent the second end of said first substantially linear member.
5. The steam generator with a spray lance according to claim 4, wherein:
each of said first, second and third substantially linear members correspondingly comprise first, second and third threaded spindles, said second and third threaded spindles comprising bearing means for mounting said second and third threaded
spindles to said third surface in said first chamber;
each of said first, second and third guide means correspondingly comprise a threaded nut threaded onto a corresponding threaded spindle;
said means for engaging said first spindle by said second and third guide means comprise bearing means for rotatably guiding said first and second ends of said first spindle therein;
said first spindle comprises second sleeve means disposed therearound, said second sleeve means comprising a longitudinal slot disposed along said first spindle;
said nut threaded on said first spindle comprises a projection extending through said slot of said second sleeve means for maintaining said nut in a non-rotating manner on said first spindle;
said first apparatus for moving comprises a first drive means for rotating said first threaded spindle to move said corresponding nut means along said first threaded spindle;
said second apparatus for moving comprises a second drive means for rotating one of: said second and third threaded spindles; and
said second apparatus for moving comprises a transmission element disposed between said second and third threaded spindles for rotating said second and third threaded spindles in synchronization with one another.
6. The steam generator with a spray lance according to claim 5, wherein:
said first guide means comprises a first housing disposed between said first and second arm members;
said first housing having first and second sides disposed adjacent said first and second arm members;
said adjacent ones of said first and second sides and first and second arm members comprise pivot means for mounting said first housing to said first and second arm members to rotate about a first axis of rotation, said first axis of rotation
being substantially parallel to said first spindle means;
said first housing additionally comprises third and fourth sides disposed between and connecting said first and second sides;
said first sleeve means with said third and fourth sides comprising pivot means for mounting said first sleeve means to said third and fourth sides to rotate about a second axis of rotation, said second axis of rotation being perpendicular to
said first axis of rotation; and
said first guide means further comprises a second housing disposed about said second sleeve means, said projection of said corresponding threaded nut of said first spindle engaging said second housing for maintaining said second housing in a
non-rotatable manner about said first spindle; and
said first and second arm members being attached to said second housing.
7. The steam generator with a spray lance according to claim 6, wherein:
said first guide means comprises a single component forming said second housing and said first and second arm members;
said second housing portion of said single component has an interior portion disposed towards said second sleeve means and an exterior portion opposite to said interior portion;
said second housing portion comprises a slot therein aligned with said slot of said second sleeve means;
said projection of said nut means comprises a T-shaped key member having a first portion for being inserted through said second housing portion of said single component from the exterior thereof into engagement with said corresponding threaded
nut of said first spindle, and a second portion for abutting said exterior of said second housing portion; and
said first portion of said key member comprising means for fastening said key member to said corresponding threaded nut and said second portion of said key member comprises means for fastening said key member to said exterior portion of said
second housing portion.
8. The steam generator with a spray lance according to claim 7, wherein:
said first and second drive means comprise first and second geared motors;
said steam generator further comprises computer processing means for operating said geared motors to rotate said first, second and third spindles to move said spray lance according to predetermined spray patterns, said predetermined spray patters
comprising patterns having 90.degree. turns;
said first, second and third spindles comprise a protective member disposed thereabout for protecting said spindles from contamination, said protective member comprises one of:
bellows; and
a spiral spring;
said second and third spindles each comprise a first end and a second end;
said means for washing further comprises:
a first mounting box for rotatably mounting said first ends of said second and third spindles; and
a second mounting box for rotatably mounting said second ends of said second and third spindles;
one of said first and second mounting boxes housing said transmission element between said second and third spindles;
said transmission element comprises a chain transmission disposed about said second and third spindles;
said first spindle comprises a vertical spindle;
said second spindle comprises an upper horizontal spindle and said third spindle comprises a lower horizontal spindle;
said upper spindle being driven by said geared motor, and said lower spindle being driven by said chain transmission via said second geared motor;
said means for washing further comprises a square-pyramidal shaped housing member having a base portion projecting away from said first surface of said heat exchange member, and opening outwardly towards said first surface of said heat exchange
member;
said base portion of said pyramidal housing comprising a cardan joint for mounting said second end of said spray lance to said third surface of said first chamber;
said pyramidal housing comprising means for attaching said housing to said third surface of said first chamber;
said first, second and third spindles comprise sensor means for sensing movement of said first, second and third spindles;
said spray lance comprises a spray lance for ejecting liquid under pressure towards said first surface of said heat exchange member;
said first sleeve means of said first guide means has first and second ends, and at least said first and second ends of said sleeve means comprises slide bushings disposed therein and disposed about said spray lance to facilitate axial sliding of
said spray lance within said sleeve means;
said first guide means further comprises a bushing disposed about said second sleeve means between said second sleeve means and said second housing portion of said single component at least adjacent ends of said second housing portion;
said second and third guide means further comprise additional housings for housing said bearing means for engaging said first spindle; and
said corresponding threaded nuts of said second and third spindles comprise means for engaging said additional housings of the corresponding second and third guide means.
9. In a steam generator, a means for washing contaminants off at least a first surface of a heat exchange member, the steam generator having a combustion chamber for burning fuel to generate heat; a first chamber adjacent said combustion
chamber for receiving heat generated by combustion from the combustion chamber, a heat recovery chamber for containing water to be heated by heat generated by combustion, the heat exchange member being disposed between said first chamber and said heat
recovery chamber, and the first surface of the heat exchange member being disposed in said first chamber, said means for washing comprising:
nozzle means for ejecting fluid under pressure against said first surface, the nozzle means having a first end for being disposed toward the first surface of the heat exchange member and a second end disposed opposite said first end, said nozzle
means defining an axial direction between said first and second ends;
means for pivotably mounting said nozzle means in the first chamber at a position substantially opposite said first surface;
means for supplying fluid under pressure to said nozzle means;
means for pivoting said first end of said nozzle means relative to said second end of said nozzle means to move said first end of said nozzle means along at least:
a first substantially linear path; and
a second substantially linear path disposed angularly to said first path to define a plane of movement of said first and second paths, said plane of movement being disposed angularly with respect to said axial direction of said nozzle means;
said means for moving comprising:
first moving means for moving said first end of said nozzle means along said first substantially linear path, said first moving means comprising:
a first substantially linear member, said first substantially linear member defining said first substantially linear path;
first guide means for being moved along said first substantially linear member, said first guide means comprising means for receiving said first end of said nozzle means therein for movement of said nozzle means with said first guide means; and
first apparatus for moving said first guide means along said first substantially linear member; and second moving means for moving said first substantially linear member in said plane of movement.
10. The washing means according to claim 9, wherein said first guide means further comprises:
a U-shaped portion having first and second arm members extending therefrom;
first sleeve means for being disposed about said first end of said nozzle means, said nozzle means being movable axially within said first sleeve means; and
means for pivotably mounting said first sleeve means between said first and second arm members to provide a conical angle of movement for said first sleeve means.
11. The washing means according to claim 10, wherein said first substantially linear member has a first end and a second end, and said second moving means comprises:
a second substantially linear member disposed angularly with respect to said first substantially linear member, said second substantially linear member defining said second substantially linear path;
second guide means for being moved along said second substantially linear member, said second guide means comprising means for engaging said first substantially linear member adjacent the first end of said first substantially linear member for
movement of said first substantially linear member along said second substantially linear member;
a third substantially linear member disposed parallel to said second substantially linear member;
third guide means for being moved along said third substantially linear member, said third guide means comprising means for engaging said first substantially linear member adjacent the second end of said first substantially linear member; and
second apparatus for moving said second and third guide means along said second and third substantially linear members.
12. The washing means according to claim 11, wherein:
said first substantially linear member is disposed substantially perpendicularly to said second and third substantially linear members;
said first guide means comprises a first housing disposed between said first and second arm members;
said first housing having first and second sides disposed adjacent said first and second arm members;
said adjacent ones of said first and second sides and first and second arm members comprise pivot means for mounting said first housing to said first and second arm members to rotate about a first axis of rotation, said first axis of rotation
being substantially parallel to said first spindle means;
said first housing additionally comprises third and fourth sides disposed between and connecting said first and second sides;
said first sleeve means with said third and fourth sides comprising pivot means for mounting said first sleeve means to said third and fourth sides to rotate about a second axis of rotation, said second axis of rotation being perpendicular to
said first axis of rotation;
said first guide means further comprises a second housing disposed about said first spindle, said projection of said corresponding threaded nut of said first spindle engaging said second housing for maintaining said second housing in a
non-rotatable manner about said first spindle; and
said first and second arm members being attached to said second housing.
13. The washing means according to claim 12, wherein:
each of said first, second and third substantially linear members correspondingly comprise first, second and third threaded spindles, said second and third threaded spindles comprising bearing means for mounting said second and third threaded
spindles to a second surface in said first chamber;
each of said first, second and third guide means correspondingly comprise a threaded nut threaded onto a corresponding threaded spindle;
said means for engaging said first spindle means by said second and third guide means comprise bearing means for rotatably guiding said first and second ends of said first spindle therein;
said first spindle comprises second sleeve means disposed therearound, said second sleeve means comprising a longitudinal slot disposed along said first spindle;
said nut threaded on said first spindle comprises a projection extending through said slot of said second sleeve means for maintaining said nut in a non-rotating manner on said first spindle;
said first apparatus for moving comprises a first drive means for rotating said first threaded spindle to move said corresponding nut means along said first threaded spindle;
said second apparatus for moving comprises a second drive means for rotating one of: said second and third threaded spindles; and
said second apparatus for moving comprises a transmission element disposed between said second and third threaded spindles for rotating said second and third threaded spindles in synchronization with one another.
14. The washing means according to claim 13, further comprising:
a square-pyramidal shaped housing member having a base portion projecting away from said first surface of said heat exchange member, and opening outwardly towards said first surface of said heat exchange member;
said base portion of said pyramidal housing comprising a cardan joint for mounting said second end of said nozzle means to said second surface of said first chamber;
said cardan joint providing a fluid communication through said second surface of said first chamber to said means for providing fluid under pressure; and
said pyramidal housing comprising means for attaching said housing to said second surface of said first chamber.
15. The washing means according to claim 14, wherein said second and third spindles each comprise a first end and a second end, and said means for washing further comprises:
a first mounting box for rotatably mounting said first ends of said second and third spindles; and
a second mounting box for rotatably mounting said second ends of said second and third spindles;
one of said first and second mounting boxes houses said transmission element between said second and third spindles; and
said transmission element comprises a chain transmission disposed about said second and third spindles.
16. The washing means according to claim 15, wherein:
said first guide means comprises a single component forming said second housing and said first and second arm members;
said second housing portion of said single component has an interior portion disposed towards said second sleeve means and an exterior portion opposite to said interior portion;
said second housing portion comprises a slot therein aligned with said slot of said second sleeve means;
said projection of said nut means comprises a T-shaped key member having a first portion for being inserted through said second housing portion of said single component from the exterior thereof into engagement with said corresponding threaded
nut of said first spindle, and a second portion for abutting said exterior of said second housing portion; and
said first portion of said key member comprising means for fastening said key member to said corresponding threaded nut and said second portion of said key member comprises means for fastening said key member to said exterior portion of said
second housing portion.
17. The washing means according to claim 16, wherein:
said first and second drive means comprise first and second geared motors;
said steam generator further comprises computer processing means for operating said geared motors to rotate said first, second and third spindles to move said nozzle means according to predetermined spray patterns, said predetermined spray
patters comprising patterns having 90.degree. turns;
said first, second and third spindles comprise a protective member disposed thereabout for protecting said spindles from contamination, said protective member comprises one of:
bellows; and
a spiral spring;
said first spindle comprises a vertical spindle;
said second spindle comprises an upper horizontal spindle and said third spindle comprises a lower horizontal spindle;
said upper spindle being driven by said geared motor, and said lower spindle being driven by said chain transmission via said second geared motor;
said first, second and third spindles comprise sensor means for sensing movement of said first, second and third spindles;
said nozzle means comprises a nozzle means for ejecting liquid under pressure towards said first surface of said heat exchange member;
said first sleeve means of said first guide means has first and second ends, and at least said first and second ends of said sleeve means comprises slide bushings disposed therein and disposed about said nozzle means to facilitate axial sliding
of said nozzle means within said first sleeve means;
said first guide means further comprises a bushing disposed about said second sleeve means between said second sleeve means and said second housing portion of said single component at least adjacent ends of said second housing portion;
said second and third guide means further comprise additional housings for housing said bearing means for engaging said first spindle; and
said corresponding threaded nuts of said second and third spindles comprise means for engaging said additional housings of the corresponding second and third guide means. |
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Claims |
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Description |
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CONTINUING
APPLICATION DATA
This application is a continuation-in-part application of International Application No. PCT/DE92/01050, filed on Dec. 9, 1992, which claims priority from Federal Republic of Germany Patent Application No, P 42 39 410.4, filed on Nov. 17, 1992,
and Federal Republic of Germany Patent Application No, P 41 42 448, filed on Dec. 18, 1991. International Application No. PCT/DE92/01050, was pending as of the filing date of this application.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention generally relates to a steam generator with a water lance sprayer, or blower, for cleaning heat exchange surfaces, and more particularly for cleaning a combustion-chamber heat-transfer surface in a steam boiler. Such a water lance
blower can have an outlet opening swivellably supported in a wall of the steam generator, with the rear parts thereof swivellably suspended for movement at the mounting wall.
2. Background Information
The cleaning of the combustion chambers of steam boilers having a high capacity, during operation, can be achieved, among other methods, with the aid of water lance blowers which can be mounted on a first wall of the steam boiler to throw a
concise water jet, through the combustion chamber, and against the opposite wall. The contaminations of soot, slag and ash can then be peeled off due to the kinetic energy of the water jet hitting the surfaces, and also as a result of the thermal shock
caused when the cooler water hits the heated surfaces of the exchanger.
To enable such a cleaning, the blowpipe, provided with a concentric spray nozzle, has been linked via a roller guide, with a drive for carrying out superimposed movements of the blow pipe, in an articulated way. For cleaning purposes, the water
lance blower can be guided through a wall of the combustion chamber at an opened hatch, or the blowpipe can be entered into the combustion chamber through a piece of pipe supported in the hatch. Then, subsequent to the cyclic cleaning process, the water
lance blower will typically be swung out or moved backward linearly, to remove the pipe from the combustion chamber, and thereby protect the blowing nozzle thermally and mechanically. Such a procedure, however, requires expensive equipment which is
susceptible to trouble and, apart from that, renders it very difficult to automate the cleaning process. Moreover, with such solutions, multiple deflections, or bends, are needed in the water supply system, which deflections can cause high losses of
water pressure ejected from the nozzles.
For avoiding the leakage of air into the steam boiler, and also for preventing contamination from exiting out of the steam boiler, the pipe passage through the combustion-chamber wall must preferably be as tight as possible.
For sealing longitudinally shiftable and rotatable jet pipes, it is known that the jet pipe can be passed through a stuffing box which is screwed to the face plate of the soot blower, as is described by Federal Republic of Germany Patent No. 17
51 511. This type of solution is essentially applicable, however, only to rigid water lance blowers.
For swivel-type water lance blowers, it is known that the blower head can be supported in a hatch of the combustion-chamber wall by means of a ball joint as is disclosed by German Democratic Republic Patent No. 145 476. With this solution, it is
however disadvantageous that the hatch in the combustion-chamber wall must be divided horizontally and inserted into a machined spheroidal bore of a ball joint. Due to the entry of impurities into the sliding surfaces of the ball joint, the sliding
surfaces tend to wear very quickly, so that the service life will typically be very short and the sealing and swivel function cannot be ensured any longer due to the fact that the ball joint gets jammed.
For exchanging the ball joint, the entire hatch must be removed. Thus, the removal of the hatch would provide an opening in the chamber surfaces, and the steam boiler essentially has to be put out of service for this purpose, so that
contaminants do not leak out of the combustion chamber.
With another known water lance blower, the blowpipe is not required to be moved axially any longer, the diameter of the pipe passage through the hatch is reduced, and a self-cleaning effect is achieved between the sliding parts of the pipe
passage. Such an arrangement is shown by German Democratic Republic Patent No. 235 102.
This is constructively achieved by a blow-through cylinder which is rigidly flange-mounted to the front of the blowing nozzle, and the outlet opening of the blowing nozzle is introduced into the blow-through cylinder. The blow-through cylinder
is rigidly fastened in the ball joint, formed by a ball segment, and, in its free part, is slotted or provided with bores.
With this type of water lance blower, it is disadvantageous that the self-cleaning effect of the ball joint have not been found to be sufficient. The partition of the joint proves to be disadvantageous with regard to the heat admission due to
the different expansions of both the halves. In spite of the design of a swivel-type roller guide, even with this solution, in the combustion chamber, no exact rectangular blowing pattern can be achieved on the opposite combustion-chamber wall by the
ejected stream.
OBJECT OF THE INVENTION
The present invention is based on the task of designing a water lance blower, whose outlet opening can be swivellably supported in the wall of the steam boiler and whose rear end can be swivellably suspended in such a way that an all-around
movability in a plane is ensured at the outlet opening, without contamination, and that the ejected jet describes an essentially exactly defined course at the opposite boiler wall.
SUMMARY OF THE INVENTION
According to the present invention, this object can be achieved by providing the blowpipe assembly with a flange which can be disposed at the outlet opening of the blowpipe, which flange can be attached to a segment of a cardan, or universal
joint, while the cardan joint can be fastened in the combustion-chamber wall. The rear part of the blowpipe can preferably be arranged in a guide, which guide can preferably be vertically shiftable on a vertical spindle. In turn, the vertical spindle,
at the top and bottom thereof, can preferably be shiftable horizontally on horizontal spindles, The guide can preferably be formed from a housing that can be non-rotatably located on the vertical spindle and, on the side thereof, can carry a fork-shaped
accommodation in which a cardan-shaped cage is arranged. The cardan-shaped cage can be internally designed as a sleeve which can accept the blowpipe therein in an axially shiftable way.
Furthermore, the vertical spindle can preferably be enclosed by a stationary protective pipe, or sleeve, with a longitudinal groove. A threaded nut with a fitting key can then be arranged on the vertical spindle with the fitting key being guided
in the longitudinal groove and projecting from this groove. The key can be configured to hold a bushing, on which bushing the housing can be located. The vertical spindle can be driven by a geared motor, which geared motor can turn the vertical
spindle. Thus, since the threaded nut can preferably be held in a non-rotatable manner about the vertical spindle, the nut will move upwardly and downwardly depending on the direction of rotation of the spindle.
The housing and the fork-shaped accommodation can preferably advantageously be made of one piece, and the fitting key can preferably be T-shaped. The flange of the key can then preferably be fastened to the housing from the outside, and the
shaft can preferably pass through the housing into engagement with the threaded nut. The vertical and the horizontal spindles are enclosed by a bellow or a spiral protective spring.
Both the horizontal spindles can preferably be supported at least adjacent the ends thereof in a front box, or housing, and in a rear box, or housing. The upper spindle can preferably be driven by a geared drive motor, and the lower spindle can
be driven in conjunction with the upper spindle by means of a chain located in the rear box and engaged between both horizontal spindles, i.e. about toothed gears disposed about the spindles.
Alternatively, the lower horizontal spindle could be driven by a drive motor, if desired, and the upper spindle could be driven by a chain engaged between the two spindles, or it might also be conceivable to drive both horizontal spindles by
separate motors which can be driven in synchronization with one another.
In summary, one aspect of the invention resides broadly in a steam generator with a spray lance for cleaning contaminants off a surface of a heat exchange member of the steam generator, the steam generator comprising: a combustion chamber for
burning fuel to generate heat; fuel supply apparatus for supplying fuel to the combustion chamber; a first chamber adjacent the combustion chamber for receiving heat generated by combustion from the combustion chamber; a heat recovery chamber for
containing water to be heated by heat generated by combustion; the heat exchange member being disposed between the first chamber and the heat recovery chamber to transfer heat generated by combustion to water contained in the heat recovery chamber; the
heat exchange member having a first surface in the first chamber and a second surface in the heat recovery chamber and the heat exchange member being configured for transferring heat from the first surface to the second surface; and apparatus for
removing contaminants from the first heat exchange surface, the apparatus for removing comprising: the spray lance, the spray lance having a first end disposed towards the first surface for ejecting fluid under pressure against the first surface, and a
second end opposite the first end, the spray lance defining an axial direction between the first and second ends; apparatus for pivotably mounting the spray lance in a third surface in the first chamber, the third surface being substantially opposite the
first surface; apparatus for supplying fluid under pressure to the spray lance; apparatus for pivoting the first end of the spray lance relative to the second end of the spray lance to move the first end of the spray lance along at least: a first
substantially linear path; and a second substantially linear path disposed angularly to the first path to define a plane of movement of the first and second paths, the plane of movement being disposed angularly with respect to the axial direction of the
spray lance.
Another aspect of the invention resides broadly in apparatus for washing contaminants off at least a first surface of a heat exchange member in a steam generator, the steam generator having a combustion chamber for burning fuel to generate heat;
a first chamber adjacent the combustion chamber for receiving heat generated by combustion from the combustion chamber, a heat recovery chamber for containing water to be heated by heat generated by combustion, the heat exchange member being disposed
between the first chamber and the heat recovery chamber, and the first surface of the heat exchange member being disposed in the first chamber, the apparatus for washing comprising: nozzle apparatus for ejecting fluid under pressure against the first
surface, the nozzle apparatus having a first end for being disposed toward the first surface of the heat exchange member and a second end disposed opposite the first end, the nozzle apparatus defining an axial direction between the first and second ends;
apparatus for pivotably mounting the nozzle apparatus in the first chamber at a position substantially opposite the first surface; apparatus for supplying fluid under pressure to the nozzle apparatus; apparatus for pivoting the first end of the nozzle
apparatus relative to the second end of the nozzle apparatus to move the first end of the nozzle apparatus along at least: a first substantially linear path; and a second substantially linear path disposed angularly to the first path to define a plane of
movement of the first and second paths, the plane of movement being disposed angularly with respect to the axial direction of the nozzle apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
The embodiments of the present invention are explained in greater detail herebelow, including an operational example, with reference to the accompanying drawings, in which:
FIG. 1b shows a partial view of a steam boiler with a water lance blower for cleaning a heat exchange surface;
FIG. 1 shows a front view of the water lance blower;
FIG. 1a shows a more detailed view of the water lance blower of FIG. 1;
FIG. 2 shows a side view in accordance with the embodiment depicted in FIG. 1;
FIG. 2a shows a more detailed view of the embodiment of FIG. 2;
FIG. 3 shows one embodiment of a guide for the blowpipe;
FIG. 3a shows an embodiment similar to that of FIG. 3, but more detailed;
FIG. 4 shows a section through the guide according to FIG. 3;
FIG. 4a shows an embodiment similar to that of FIG. 4, but more detailed;
FIG. 5 depicts an alternative version of a guide for the blowpipe in a partial section;
FIG. 6 shows a section through the housing with the fitting key according to the embodiment of FIG. 5; and
FIGS. 7a and 7b show possible spray patterns which can be provided by possible embodiments of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A general type of heating apparatus which heats via combustion, such as the simplified representation of a steam boiler 100, shown in FIG. 1b, will typically have a combustion chamber 101 which is separated from a heat recovery area 102 by a heat
exchange surface 103. In general, a heat recovery area 102 will be flushed through with a fluid, such as liquid or air, to heat the fluid with the heat generated in the combustion chamber 101. In the depicted embodiment, water is used to generate
steam. The heated fluid can then be conducted to remote locations for area heating, etc., or in the case of the depicted embodiment, to an electric generator for generating electricity. The heat exchange surface 103 in essence, keeps the combustion
pollutants, such as soot, ash, carbon monoxide, etc., from entering into the heated fluid, while also receiving the heat generated by the combustion, to thereby transfer the heat to the fluid on the other side thereof.
During the combustion process, soot and ash can tend to form a layer of contamination on the surface 103, and this layer of contamination can then reduce the effectiveness of the heat exchange which occurs at the surface 103. Thus, cleaning
apparatus, such as the water lance sprayer, blower, or nozzle 105, can be provided at another surface 104 of the heating apparatus, which surface can preferably be a non-heat exchange surface, to force water, under high pressure, against the heat
exchange surface 103 to remove any deposits which might have formed thereon. The water from the the lance blower 105 and any contaminants washed off of surface 103 can be drained from the boiler 100 by means of a water collection and drain area | | |
