克莱德吹灰器VS_description_and_specifications

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 1 of 1A1Revision Number0GENERAL DESCRIPTION17 October 2005Document l DescriptionA1.1Principle and Design(Reference: Section H1 (Illustrations)- VS Blower Component Identification drawing.)The VS Short Retracting Blower is a soot blower used for cleaning slag from furnace walls. Thebasic element is a nozzle head normally equipped with a single venturi nozzle the blower is started, from the idle position, the nozzle head advances into its blowingposition behind the internal tube wall. At this point the blower valve opens and the nozzle rotatesaccording to the required blowing arch. After completion of the blowing arc, the feed of blowingmedium is shut off and the nozzle head retracts to its original position in the wall ht-line and rotating movements are initiated by the screw tube which is attached to thenozzle head. A single, high-efficiency gearmotor drive assembly provides power for all motion ofthe unit.

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 1 of 5A2MAJOR COMPONENTSRevision NumberVS.A2.0.019 October 2005Document I.D.A2.1BLOWER FRAME(Reference: Section H1 (Illustrations) – VS Blower Component Identification drawing.)The blower frame is compact, but sturdy. The frame is constructed from structural steel angleand heavy steel plate. The welded frame ensures rigidity of the entire unit. The valve plate isbolted into position for ease of , side, and poppet valve covers protect workers from the blower’s moving parts duringoperation. These covers are easily removable for maintenance.A2.2BLOWER DRIVE AND CONTROL SYSTEM(Reference: Section H1 (Illustrations) – VS Blower Component Identification drawing.)The VS blower is driven by an AC gearmotor assembly. This gearmotor drives the hub sprocketby means of a heavy duty rotational motion of the hub sprocket assy. is transmitted to the screw tube by means of abronze threaded screw nut. A guide rod, located inside the blower frame, ensures properalignment of the blower internals and forces axial movement (straight-forward movement withoutblowing) of the screw tube. In the blowing position the guide rod and screw tube are no longerengaged (the axial movement stops). At this point, the screw tube has screwed itself fully into thebronze nut and is set into rotation by the two limit switches are mounted to and wired to the terminal box ready for operation in theworkshop. They control the screw tube’s forward and rearward movements as well as theblowing required one or several blowing revolutions can be performed.A2.3SCREW TUBE, FEED TUBE AND VALVE ACTUATION(Reference: Section H1 (Illustrations) – VS Blower Component Identification drawing.)The screw tube moves forward and rearward along the fixed feed nozzle head is attached to the front end of the screw tube. A stuffing box is located at therear (poppet valve) end of the screw tube. The stuffing box contains packing which seals theannular space between the screw and the feed tube to prevent the blowing medium fromescaping.

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 2 of 5A2MAJOR COMPONENTSRevision NumberVS.A2.0.019 October 2005Document front portion of the stainless steel feed tube remains inside the screw spindle and its rear endis attached to the valve ed to the screw tube flange is the poppet cam. At full forward travel, the poppet camengages a roller attached to the lever arm assy. The screw tube at this point may only rotation of the screw tube in turn rotates the lever arm assy. which opens the poppet the end of the blowing cycle, the poppet cam releases the valve lever permitting the valve toclose. The motor direction is reversed and the screw tube is retracted from the poppet cam is designed for the specific blowing arc required at the installation. Should theblowing arc need to be changed, the cam can be replaced with little effort. Contact your ClydeBergemann for further information.A2.4NOZZLE HEAD(Reference: Section H1,(Illustrations) Project specific lance tube drawing.)The VS blower’s nozzle head is made of heat and scale resisting project specific lance tube assy. is normally provided with a nozzle head containing oneventuri nozzle. The jet produced blows at an incline to the wall heating surfaces. Betweenblowing cycles, the nozzle head is retracted into the wall sleeve.A2.5BLOWER VALVE(Reference: Section H1, (Illustrations) BE-1151A-WC6-2 – Poppet Valve Assy.)The blowing medium is fed to the feed and lance tube through a poppet valve, which has astandard ANSI 600# R.F. flange. The flange on the poppet valve is connected to the blowingmedium supply piping. The valve stem is sealed off by means of a pure graphite valve stempacking. A matching set of cone, stem, seat and packing is available for replacement and readilyassembled for blower valve is opened by the rotating action of the screw tube. The poppet cam on thescrew tube flange engages a roller on the valve lever at the end of the forward travel. When thevalve lever engages, this depresses the valve stem and thus opens the poppet the end of the blowing cycle, the poppet cam releases the valve lever permitting the valve toclose. The motor direction is reversed and the screw tube is retracted from the boiler.

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 3 of 5A2MAJOR COMPONENTSRevision NumberVS.A2.0.019 October 2005Document pressure from the supply line can be independently adjusted with respect to the valveopening via the pressure control disc. There are two threaded plug openings supplied as astandard for monitoring of the blowing pressure downstream of the seat and for connection of avent valve and seal air.A2.6VENT VALVETo prevent corrosive flue gases from penetrating the nozzle head, a vent valve is installedlaterally at the blower valve’s casing. It is opened between blowing cycles and permitsscavenging air to pass through the components in which a blowing medium flows. As soon asthe blower valve opens, the vent valve is closed by the pressure of the incoming blowing normal operating conditions, the pressure differential between the negative furnacepressure and the surrounding atmosphere provides a sufficient flow of scavenging air through thevent valve. Then this flows through the nozzle head at the soot blower locations where the boiler pressure is positive, the vent valve must be connectedto an air supply with over pressure (4 – 6” wg) (100-150 mm), to prevent the flue gasespenetrating the components in which the blowing agent flows.A2.7WALLBOX(Reference: Section H1 (Illustrations), Wallbox DetailA2.7aNegative Pressure InstallationsThe wallbox seals the entry point of the nozzle head through the boiler wall and serves toattach the blower to the furnace. The blower is bolted to the front plate of the permanent negative pressure on the flue gas side, the annular space between theentry point at the boiler and the nozzle head, provides a sufficient flow of sealing air intothe additional pipe union for impinging sealing air is provided at the wallbox to protectagainst short-term positive furnace pressure.A2.7bPositive Pressure InstallationsThe wallbox is functionally the same as noted above. However for positive flue gaspressures, sealing air MUST be provided to the connection point noted. The sealing airshould be supplied at a pressure 4-6” wg higher than maximum boiler pressure to preventthe flue gases from entering the wallbox.A branch from the sealing air line can be connected to the vent valve to supply the scavenging airrequired to purge flue gases from the lance tube.

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 4 of 5A2MAJOR COMPONENTSRevision NumberVS.A2.0.019 October 2005Document DATADrive Speed1Advancement per revolutionBlowing ArcDimensions & Material TubeMaterialOuter DiameterWall TubeMaterialOuter DiameterInner HeadMaterialOuter DiameterWall thicknessASTM A447 Stainless Steel60.3 mm (2.375”)5.5 mm (.22”)ASTM A-819 102668.2 mm (2.687”)51.4 mm (2.025”)304 Stainless Steel49 mm (1.96”)3 mm (.118”)ASTM A217, Grade WC6Type 440 Stainless SteelType 416 Stainless Steel0.25 HP (208-230/460V, 3 Phase, 60 Hz, 1800 RPM)250 mm (9 13/16”)438 mm/min (17.25”/min)127mm (5”)360 degrees

VS WALL SOOTBLOWERINSTALLATION,COMMISSIONING, OPERATION &MAINTENANCE MANUALPage 5 of 5A2MAJOR COMPONENTSRevision NumberVS.A2.0.019 October 2005Document aterialDiameter304 Stainless Steel2-3/8” O.D.