EP0461747A2 - Nettoyeur de l'ouverture auxiliaire pour l'ouverture de détection dans l'écran d'une chaudière - Google Patents

Nettoyeur de l'ouverture auxiliaire pour l'ouverture de détection dans l'écran d'une chaudière Download PDF

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Publication number
EP0461747A2
EP0461747A2 EP91303171A EP91303171A EP0461747A2 EP 0461747 A2 EP0461747 A2 EP 0461747A2 EP 91303171 A EP91303171 A EP 91303171A EP 91303171 A EP91303171 A EP 91303171A EP 0461747 A2 EP0461747 A2 EP 0461747A2
Authority
EP
European Patent Office
Prior art keywords
wallbox
port
cleaner
cutting member
sleeve
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.)
Withdrawn
Application number
EP91303171A
Other languages
German (de)
English (en)
Other versions
EP0461747A3 (en
Inventor
Paul Thomas Anderson
Richard Charles Vetterick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of EP0461747A2 publication Critical patent/EP0461747A2/fr
Publication of EP0461747A3 publication Critical patent/EP0461747A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H15/00—Cleaning arrangements for grates; Moving fuel along grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers

Definitions

  • the present invention relates to a cleaner for a port in the sidewall of a recovery boiler and more particularly to a cleaner for a sensing port used by sonic or video measuring devices or other similar instruments.
  • a sonic temperature measuring device projects sound waves across the boiler. Time in flight and amplitude of the sound waves across the boiler are measured to provide an average temperature across the width of the boiler. Sonic as well as video devices must have a clear path through the boiler wall to function properly.
  • a sonic sensing device includes a sonic transducer coupled to the boiler wall through a wallbox mounted to the boiler wall.
  • a port through the boiler wall provides access to the interior of the boiler through which the transducer transmits and receives sound waves.
  • PYROSONIC-2000 is a Registered Trademark of the Babcock & Wilcox company.
  • the sensing port cleaner of this invention will be described in conjunction with the PYROSONIC-2000. It is to be understood that the sensing port cleaner of this invention can be used with various instruments with appropriate adaptation.
  • the boiler wall port In operation, the boiler wall port will become clogged by matter contained in combustion gasses and also by slag products running down the furnace wall.
  • the term "slag" will be used throughout the remainder of the specification to refer to the matter accumulating on the boiler wall. The accumulation of slag in the port interferes with the transmission and reception of the acoustic wave from the sonic device.
  • the wallbox used to mount sound and light sensing devices is a generally tubular shaped member mounted at one end to the boiler wall surrounding the port.
  • the opposite end of the wallbox includes a mounting flange to which the port cleaner and sonic device are mounted.
  • the sonic device includes a wave guide through which the sound waves are emitted and received.
  • the wave guide forms a passage diverging from the sound wave source and terminates in a flange for attaching the device to the wallbox mounting flange.
  • a funnel or cylindrical shaped wave guide extension may also be included within the wallbox and forms an extension of the wave guide from the mounting flange to the boiler wall port.
  • the port cleaner comprises a cutting sleeve disposed in the wallbox surrounding the wave guide extension.
  • An air cylinder is coupled to the cutting sleeve to move the sleeve longitudinally from a retracted position in the wallbox to an extended position in which the end of the cutting sleeve extends through the boiler wall port.
  • the cutting sleeve removes slag from the port to clean the port.
  • the cutting end of the sleeve defines a plane which is at an angle relative to the plane of the port such that the sleeve end forms an advancing shearing line as the sleeve moves through the port.
  • the terminal end of the wave guide extension has an outside diameter closely fitting the inner diameter of the cutting sleeve such that as the sleeve is retracted, the terminal end of the wave guide extension removes accumulated slag from the inside of the sleeve.
  • the end of the wave guide extension defines a plane at an angle to the plane of the port with the top portion of the wave guide extension projecting further than the lower portion in a manner that is complementary to sonic transmission. As the top of the wave guide extension removes slag from the cleaning sleeve, the falling slag will clear the lower end of the extension to avoid slag accumulation in the extension.
  • the cutting sleeve is coupled to the piston rod of an air cylinder by two parallel connecting rods.
  • the connecting rod move the sleeve between the retracted and extended positions as the cylinder is actuated.
  • Two connecting rods are used to insure parallel alignment of the sleeve in the wallbox and about the wave guide extension to prevent jamming of the sleeve.
  • An adjustable electrically operated timer energizes a solenoid at preset intervals to provide air pressure to the cylinder via a valve.
  • a purge air coupling in the wallbox enables air to be introduced into the wallbox at a slight positive pressure to remove airborne fumes and loose particles from the wallbox. Purge air may also be used to condition the slag to provide positive shearing characteristics.
  • the sensing port cleaner of the present invention for cleaning a boiler port used by a sonic temperature sensor is designated generally at 10 in Figure 1.
  • the port cleaner 10 includes a cutting sleeve 12 which, as will be described in greater detail below, is moved longitudinally in and out of the boiler wall port to clean the port.
  • Cutting sleeve 12 is supported by two parallel connecting rods 14 connected at one end to the rear face 15 of the sleeve 12 at the lower portion of sleeve 12.
  • Rear face 15 is normal to the longitudinal centerline of the sleeve.
  • the opposite ends of rods 14 are attached to offset plate 16 which is in turn secured to piston rod 18 of actuating cylinder 20 by bolt 22.
  • Offset plate 16 extends radially from piston rod 18.
  • Actuating cylinder 20 is mounted to the cylinder mounting flange 24 of weldment 26.
  • the longitudinal axis 29 of sleeve 12 is thus offset from the parallel longitudinal axis 31 of the piston rod 18.
  • the end of weldment 26, opposite from the cylinder 20, includes a wallbox mounting flange 28 through which the port cleaner 10 is mounted to a boiler wallbox.
  • FIG. 2 shows the port cleaner 10 in assembly relationship with a boiler and the PYROSONIC-2000 device 44.
  • the wall of the boiler is formed by a number of water cooled tubes 32 which may be welded together by means of fins 34 in such a manner to form an opening, or port, 36.
  • the desired port for the PYROSONIC-2000 device is obtained by bending one or more tubes to form the port or by removing stud plates between the tubes.
  • a cylindrical wallbox 38 is mounted to the exterior side of the boiler wall and reinforced by a mounting bracket 40. Wallbox 38 forms a cylindrical housing surrounding the port 36.
  • the terminal end of the wallbox opposite from the boiler wall forms a mounting flange 42 through which the port cleaner 10 and sonic device are mounted to the boiler wall.
  • the PYROSONIC-2000 device 44 includes a wave guide 46 which terminates in a mounting flange 48.
  • Wave guide 46 forms a diverging passage 50 through which the device 44 emits and receives sound waves. Passage 50 diverges in the direction away from the device 44, toward the boiler.
  • a wave guide extension 52 is mounted in the wallbox 38 and forms an internal passage which serves as a continuation of the passage 50 of wave guide 46.
  • the outward end of the extension 52 includes a flange 56 which is positioned between the mounting flange 42 of the wallbox and mounting flange 48 of the device 44 to mount the extension within wallbox 38.
  • the actuating cylinder 20 is operated by a solenoid controlled valve 60 which regulates the flow of a fluid, typically air, through tubes 62 and 64 connecting the valve 60 with both ends of the cylinder 20.
  • An adjustable electrically operated timer (not shown) energizes the solenoid at preset intervals to actuate the cylinder.
  • the cutting end 66 of sleeve 12 is angled relative to the plane of the port 36 so as to present a progressive cut as it advances through the port 36.
  • the diverged end 68 of the wave guide extension 52 is also inclined relative to the plane of port 36 in a manner that is complementary to sonic transmission.
  • the wave guide extension upper end terminates closer to port 36 than does the bottom of the wave guide extension.
  • the inner periphery of cutting sleeve 12 is closely fitting with the outer periphery of the wave guide extension so that as the cutting sleeve 12 is retracted into the wallbox, any slag 70 which may accumulate on the inner surface of sleeve 12 can be removed by the end of the wave guide extension.
  • the wave guide extension end is inclined so that as slag is removed from the top portion of the sleeve 12, the falling slag will clear the lower end of the wave guide extension rather than accumulate within the extension.
  • Wallbox 38 includes a purge air connection 72 through which air is continuously supplied at a pressure of approximately 1 to 5 inches water.
  • the cutting sleeve 12 has a large diameter aperture 74 which allows for circulation of the purge air between the cutting sleeve and the wave guide extension.
  • the purge air provides continuous removal of fumes and airborne particulates in the wallbox and port 36 which may interfere with the devices. In some cases the purge air may be used to condition the slag to improve cutting characteristics.
  • the cutting sleeve 12 is mounted by two connecting rods 14 to insure parallel operation of the cutting sleeve to prevent jamming of the sleeve on the extension or the wallbox.
  • the wallbox mounting flange 28 is configured to match the wallbox mounting flange to which it is connected. Two apertures are bored through the wallbox mounting flange 48 of the device to allow the two connecting rods 14 to pass through.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
EP19910303171 1990-06-13 1991-04-10 Auxiliary port cleaner for boiler wall sensing port Withdrawn EP0461747A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53734290A 1990-06-13 1990-06-13
US537342 1990-06-13

Publications (2)

Publication Number Publication Date
EP0461747A2 true EP0461747A2 (fr) 1991-12-18
EP0461747A3 EP0461747A3 (en) 1992-04-22

Family

ID=24142249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910303171 Withdrawn EP0461747A3 (en) 1990-06-13 1991-04-10 Auxiliary port cleaner for boiler wall sensing port

Country Status (8)

Country Link
EP (1) EP0461747A3 (fr)
JP (1) JPH0593502A (fr)
KR (1) KR920001129A (fr)
CN (1) CN1057323A (fr)
AU (1) AU7509491A (fr)
BR (1) BR9102427A (fr)
CA (1) CA2039384A1 (fr)
ZA (1) ZA912799B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1937854B1 (fr) 2005-09-23 2014-11-12 Posco Feuille d'acier laminee a froid, durcissable a la cuisson dotee d'une resistance superieure, feuille d'acier galvanisee au moyen de la feuille d'acier laminee a froid et procede de fabrication de cette feuille d'acier laminee a froid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742916A (en) * 1971-01-07 1973-07-03 Goetaverken Angteknik Ab Arrangement for cleaning an air passage in the wall of a refuse burning furnace
EP0192382A2 (fr) * 1985-02-13 1986-08-27 Lt-Produkter Skutskar AB Appareil pour régler et nettoyer un passage d'air dans la paroi d'un four
US4759299A (en) * 1987-10-27 1988-07-26 Kennedy Jesse R Deslagger for instrument equipped boiler port

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742916A (en) * 1971-01-07 1973-07-03 Goetaverken Angteknik Ab Arrangement for cleaning an air passage in the wall of a refuse burning furnace
EP0192382A2 (fr) * 1985-02-13 1986-08-27 Lt-Produkter Skutskar AB Appareil pour régler et nettoyer un passage d'air dans la paroi d'un four
US4759299A (en) * 1987-10-27 1988-07-26 Kennedy Jesse R Deslagger for instrument equipped boiler port

Also Published As

Publication number Publication date
BR9102427A (pt) 1992-01-14
CA2039384A1 (fr) 1991-12-14
CN1057323A (zh) 1991-12-25
JPH0593502A (ja) 1993-04-16
AU7509491A (en) 1991-12-19
KR920001129A (ko) 1992-01-30
EP0461747A3 (en) 1992-04-22
ZA912799B (en) 1992-02-26

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