[{"data":1,"prerenderedAt":795},["ShallowReactive",2],{"site-footer-common":3,"glossary:retract-sootblower":45,"glossary-related:retract-sootblower":154},{"id":4,"extension":5,"footer":6,"meta":40,"navbar":41,"stem":43,"__hash__":44},"common\u002Fcommon.yml","yml",{"tagline":7,"links":8,"sections":9},"Acoustic cleaning intelligence for industrial fouling, soot, ash, dust and build-up.",[],[10,19,31],{"title":11,"links":12},"Product",[13,16],{"label":14,"to":15},"How it works","\u002F#product",{"label":17,"to":18},"Cost assessment","\u002F#hero",{"title":20,"links":21},"Company",[22,25,28],{"label":23,"to":24},"What we build","\u002F#about",{"label":26,"to":27},"Careers","\u002F#careers",{"label":29,"to":30},"Contact","\u002F#contact",{"title":32,"links":33},"Resources",[34,37],{"label":35,"to":36},"Blog","\u002Fresources\u002Fblog",{"label":38,"to":39},"Glossary","\u002Fglossary",{},{"links":42},[],"common","YocmZRy1AYfBbpgGVms-zhdiABlF8VTxHx6h4rDmZBA",{"id":46,"title":47,"aliases":48,"body":51,"category":135,"description":136,"extension":137,"meta":138,"navigation":139,"path":140,"relatedTerms":141,"seo":145,"sources":148,"stem":152,"term":47,"__hash__":153},"glossary\u002Fglossary\u002Fretract-sootblower.md","Retract sootblower",[49,50],"retractable sootblower","retract blower",{"type":52,"value":53,"toc":129},"minimark",[54,63,77,82,98,101,105],[55,56,57,58,62],"p",{},"A ",[59,60,61],"strong",{},"retract sootblower"," withdraws its lance into a parked position outside the boiler flue gas between cleaning operations. The retracted position protects the lance from continuous high-temperature exposure, allowing the use of relatively economical materials for long-life lances even in service above 1,000 °C.",[55,64,65,66,71,72,76],{},"The two principal retract designs are the ",[67,68,70],"a",{"href":69},"\u002Fglossary\u002Fik-long-retract-sootblower","IK long retract"," (used for cross-pass convective-bank cleaning) and short wall-blower retracts (used for ",[67,73,75],{"href":74},"\u002Fglossary\u002Fwaterwall","waterwall"," cleaning).",[78,79,81],"h2",{"id":80},"why-retract-over-fixed-designs","Why retract over fixed designs",[83,84,85,89,92,95],"ul",{},[86,87,88],"li",{},"Lance does not see continuous flue-gas exposure",[86,90,91],{},"Lance materials can be less exotic (and cheaper)",[86,93,94],{},"Inspection and replacement of the lance is straightforward",[86,96,97],{},"Cleaning sequencing can be precisely controlled in time",[55,99,100],{},"The mechanical complexity (drive motor, packing, sealing, position sensing) is the trade-off — retract designs need more maintenance than fixed alternatives.",[78,102,104],{"id":103},"related-terms","Related terms",[83,106,107,113,118,124],{},[86,108,109],{},[67,110,112],{"href":111},"\u002Fglossary\u002Fsteam-sootblower","Steam sootblower",[86,114,115],{},[67,116,117],{"href":69},"IK long retract sootblower",[86,119,120],{},[67,121,123],{"href":122},"\u002Fglossary\u002Fir-rotary-sootblower","IR rotary sootblower",[86,125,126],{},[67,127,128],{"href":74},"Waterwall",{"title":130,"searchDepth":131,"depth":131,"links":132},"",2,[133,134],{"id":80,"depth":131,"text":81},{"id":103,"depth":131,"text":104},"alternative-cleaning","A retract sootblower withdraws its lance into a parked position outside the boiler flue gas between cleaning operations. The retracted position protects the lance from continuous high-temperature exposure, allowing the use of relatively economical materials for long-life lances even in service above 1,000 °C.","md",{},true,"\u002Fglossary\u002Fretract-sootblower",[142,143,144,75],"steam-sootblower","ik-long-retract-sootblower","ir-rotary-sootblower",{"title":146,"description":147},"Retract sootblower — withdrawable steam lance for high-temperature service","A retract sootblower withdraws its lance into a parked position outside the flue gas between operations, protecting it from continuous high-temperature exposure.",[149],{"title":150,"url":151},"Babcock & Wilcox — Sootblower and Boiler Cleaning Terminology","https:\u002F\u002Fwww.babcock.com\u002Fhome\u002Fabout\u002Fresources\u002Flearning-center\u002Fsootblower-and-boiler-cleaning-terminology-principles-and-applications","glossary\u002Fretract-sootblower","s6q5kIYRPVlMOv7nzwcFYnLTqunbYwILUkGHVik1TaY",[155,402,516,663],{"id":156,"title":112,"aliases":157,"body":161,"category":135,"description":385,"extension":137,"meta":386,"navigation":139,"path":111,"relatedTerms":387,"seo":392,"sources":395,"stem":400,"term":112,"__hash__":401},"glossary\u002Fglossary\u002Fsteam-sootblower.md",[158,159,160],"sootblower","steam soot blower","steam blower",{"type":52,"value":162,"toc":379},[163,169,173,239,243,336,340,347,349],[55,164,57,165,168],{},[59,166,167],{},"steam sootblower"," projects high-pressure steam (typically 17–35 bar) through nozzles onto boiler tube banks to dislodge accumulated soot, ash and slag. Steam sootblowing is the dominant traditional boiler-cleaning technology, with major suppliers including Diamond Power (now part of ANDRITZ), Clyde Bergemann, Babcock & Wilcox and Mitsubishi Heavy Industries.",[78,170,172],{"id":171},"types","Types",[174,175,176,189],"table",{},[177,178,179],"thead",{},[180,181,182,186],"tr",{},[183,184,185],"th",{},"Type",[183,187,188],{},"Use case",[190,191,192,203,213,221,231],"tbody",{},[180,193,194,200],{},[195,196,197],"td",{},[67,198,199],{"href":69},"IK (long retract)",[195,201,202],{},"Convective superheater, reheater, generating bank",[180,204,205,210],{},[195,206,207],{},[67,208,209],{"href":122},"IR (rotary)",[195,211,212],{},"Air heater, deep convective banks",[180,214,215,218],{},[195,216,217],{},"Wall blowers",[195,219,220],{},"Furnace waterwalls, short reach",[180,222,223,228],{},[195,224,225],{},[67,226,227],{"href":140},"Retractable",[195,229,230],{},"High-temperature service, withdrawn between uses",[180,232,233,236],{},[195,234,235],{},"Fixed",[195,237,238],{},"Air heaters, smaller industrial duty",[78,240,242],{"id":241},"trade-offs-vs-sonic-horns","Trade-offs vs sonic horns",[174,244,245,260],{},[177,246,247],{},[180,248,249,252,254],{},[183,250,251],{},"Attribute",[183,253,112],{},[183,255,256],{},[67,257,259],{"href":258},"\u002Fglossary\u002Fsonic-horn","Sonic horn",[190,261,262,273,284,295,306,317,327],{},[180,263,264,267,270],{},[195,265,266],{},"Cleaning medium",[195,268,269],{},"High-pressure steam jet",[195,271,272],{},"Pulsed sound",[180,274,275,278,281],{},[195,276,277],{},"Tube erosion risk",[195,279,280],{},"Documented",[195,282,283],{},"None",[180,285,286,289,292],{},[195,287,288],{},"Steam \u002F energy consumption",[195,290,291],{},"Significant boiler steam",[195,293,294],{},"Plant compressed air only",[180,296,297,300,303],{},[195,298,299],{},"Frequency",[195,301,302],{},"Per shift typical",[195,304,305],{},"Every few minutes",[180,307,308,311,314],{},[195,309,310],{},"Effective on bonded slag",[195,312,313],{},"Yes",[195,315,316],{},"No",[180,318,319,322,324],{},[195,320,321],{},"Effective on dry friable deposits",[195,323,313],{},[195,325,326],{},"Yes (and earlier in the consolidation cycle)",[180,328,329,332,334],{},[195,330,331],{},"Moving parts in flue gas",[195,333,313],{},[195,335,283],{},[78,337,339],{"id":338},"position-in-modern-cleaning-practice","Position in modern cleaning practice",[55,341,342,343,346],{},"Modern practice typically combines both: steam sootblowers for periodic deeper cleaning, ",[67,344,345],{"href":258},"sonic horns"," for continuous prevention between sootblower cycles. The combination outperforms either alone on most convective-pass duty.",[78,348,104],{"id":103},[83,350,351,357,361,365,369,375],{},[86,352,353],{},[67,354,356],{"href":355},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[86,358,359],{},[67,360,117],{"href":69},[86,362,363],{},[67,364,123],{"href":122},[86,366,367],{},[67,368,47],{"href":140},[86,370,371],{},[67,372,374],{"href":373},"\u002Fglossary\u002Fwater-cannon","Water cannon",[86,376,377],{},[67,378,259],{"href":258},{"title":130,"searchDepth":131,"depth":131,"links":380},[381,382,383,384],{"id":171,"depth":131,"text":172},{"id":241,"depth":131,"text":242},{"id":338,"depth":131,"text":339},{"id":103,"depth":131,"text":104},"A steam sootblower projects high-pressure steam (typically 17–35 bar) through nozzles onto boiler tube banks to dislodge accumulated soot, ash and slag. Steam sootblowing is the dominant traditional boiler-cleaning technology, with major suppliers including Diamond Power (now part of ANDRITZ), Clyde Bergemann, Babcock & Wilcox and Mitsubishi Heavy Industries.",{},[388,143,144,389,390,391],"sonic-sootblower","retract-sootblower","water-cannon","sonic-horn",{"title":393,"description":394},"Steam sootblower — the dominant traditional boiler-cleaning technology","A steam sootblower projects high-pressure steam jets onto boiler tube banks to dislodge soot and ash. Effective but causes documented tube erosion and consumes valuable boiler steam.",[396,399],{"title":397,"url":398},"Wikipedia — Soot blower","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSoot_blower",{"title":150,"url":151},"glossary\u002Fsteam-sootblower","XD3SJC43DwsBLNSvsJdGRtCtrjPlwojM--cj2MByKQo",{"id":403,"title":117,"aliases":404,"body":408,"category":135,"description":506,"extension":137,"meta":507,"navigation":139,"path":69,"relatedTerms":508,"seo":509,"sources":512,"stem":514,"term":117,"__hash__":515},"glossary\u002Fglossary\u002Fik-long-retract-sootblower.md",[405,406,407],"IK sootblower","long retract sootblower","IK lance",{"type":52,"value":409,"toc":501},[410,426,430,444,448,474,480,482],[55,411,412,413,415,416,420,421,425],{},"An ",[59,414,117],{}," advances a long horizontal steam lance into the boiler's convective-pass gas flow, rotates the lance through a full revolution while emitting steam jets through paired side nozzles, then retracts the lance back into a parked position outside the flue gas. The IK type is the workhorse of convective ",[67,417,419],{"href":418},"\u002Fglossary\u002Fsuperheater","superheater"," and ",[67,422,424],{"href":423},"\u002Fglossary\u002Freheater","reheater"," cleaning on industrial and utility boilers.",[78,427,429],{"id":428},"why-it-dominates-the-convective-pass","Why it dominates the convective pass",[83,431,432,435,438,441],{},[86,433,434],{},"Steam jets reach deep between tube banks",[86,436,437],{},"Lance rotation cleans 360° of surrounding tubes per insertion",[86,439,440],{},"Lance is fully withdrawn between operations, protecting it from continuous high-temperature exposure",[86,442,443],{},"Mature design with several decades of operating experience",[78,445,447],{"id":446},"trade-offs","Trade-offs",[83,449,450,456,462,468],{},[86,451,452,455],{},[59,453,454],{},"Tube erosion"," — documented at nozzle impingement points and on the directly-opposite tube row",[86,457,458,461],{},[59,459,460],{},"Steam consumption"," — typical IK consumes 5–15 tonnes of medium-pressure steam per cycle",[86,463,464,467],{},[59,465,466],{},"Mechanical complexity"," — drive motor, lance, packing, nozzles, all require maintenance",[86,469,470,473],{},[59,471,472],{},"Lance bowing"," — long lances sag and bow under thermal cycling",[55,475,476,479],{},[67,477,478],{"href":258},"Sonic horns"," complement IK sootblowers by providing continuous low-intensity cleaning between cycles, allowing the IK to fire less frequently and reducing its contribution to tube erosion.",[78,481,104],{"id":103},[83,483,484,488,492,496],{},[86,485,486],{},[67,487,112],{"href":111},[86,489,490],{},[67,491,123],{"href":122},[86,493,494],{},[67,495,47],{"href":140},[86,497,498],{},[67,499,500],{"href":418},"Superheater",{"title":130,"searchDepth":131,"depth":131,"links":502},[503,504,505],{"id":428,"depth":131,"text":429},{"id":446,"depth":131,"text":447},{"id":103,"depth":131,"text":104},"An IK long retract sootblower advances a long horizontal steam lance into the boiler's convective-pass gas flow, rotates the lance through a full revolution while emitting steam jets through paired side nozzles, then retracts the lance back into a parked position outside the flue gas. The IK type is the workhorse of convective superheater and reheater cleaning on industrial and utility boilers.",{},[142,144,389,419],{"title":510,"description":511},"IK long retract sootblower — the workhorse of convective-pass cleaning","An IK sootblower advances a long steam lance into the gas path, rotates through 360°, and retracts. The workhorse of convective superheater and reheater cleaning.",[513],{"title":150,"url":151},"glossary\u002Fik-long-retract-sootblower","UWMSBNBfp6ftsYiv_bE3SEQ56Nm0HV9Mcho_ohsWXeQ",{"id":517,"title":123,"aliases":518,"body":521,"category":135,"description":652,"extension":137,"meta":653,"navigation":139,"path":122,"relatedTerms":654,"seo":656,"sources":659,"stem":661,"term":123,"__hash__":662},"glossary\u002Fglossary\u002Fir-rotary-sootblower.md",[519,520],"IR sootblower","rotary sootblower",{"type":52,"value":522,"toc":647},[523,532,536,555,559,628,631,633],[55,524,412,525,527,528,531],{},[59,526,123],{}," is a short, fixed-position rotating steam lance with permanently-installed nozzles. Unlike the ",[67,529,530],{"href":69},"IK long-retract design",", the IR lance does not withdraw between operations — it rotates in place, projecting steam onto adjacent tube banks within its rotation radius.",[78,533,535],{"id":534},"typical-applications","Typical applications",[83,537,538,545,548],{},[86,539,540,544],{},[67,541,543],{"href":542},"\u002Fglossary\u002Fair-heater","Air heater"," cold-end cleaning",[86,546,547],{},"Deep convective superheater banks where insertion is impractical",[86,549,550,554],{},[67,551,553],{"href":552},"\u002Fglossary\u002Frecovery-boiler","Recovery boilers"," — used alongside IK retract designs",[78,556,558],{"id":557},"trade-offs-vs-ik","Trade-offs vs IK",[174,560,561,574],{},[177,562,563],{},[180,564,565,567,570],{},[183,566,251],{},[183,568,569],{},"IR rotary",[183,571,572],{},[67,573,70],{"href":69},[190,575,576,587,598,607,617],{},[180,577,578,581,584],{},[195,579,580],{},"Lance withdrawal",[195,582,583],{},"Continuous in flue gas",[195,585,586],{},"Withdrawn between cycles",[180,588,589,592,595],{},[195,590,591],{},"Reach",[195,593,594],{},"Short, fixed radius",[195,596,597],{},"Long, traverses across pass",[180,599,600,603,605],{},[195,601,602],{},"Continuous-exposure damage",[195,604,313],{},[195,606,316],{},[180,608,609,611,614],{},[195,610,466],{},[195,612,613],{},"Lower",[195,615,616],{},"Higher",[180,618,619,622,625],{},[195,620,621],{},"Coverage",[195,623,624],{},"Local",[195,626,627],{},"Cross-section of pass",[55,629,630],{},"IR lances suffer accelerated wear from continuous flue-gas exposure compared with IK retracts but are mechanically simpler and suit applications where the cleaning zone is fixed.",[78,632,104],{"id":103},[83,634,635,639,643],{},[86,636,637],{},[67,638,112],{"href":111},[86,640,641],{},[67,642,117],{"href":69},[86,644,645],{},[67,646,543],{"href":542},{"title":130,"searchDepth":131,"depth":131,"links":648},[649,650,651],{"id":534,"depth":131,"text":535},{"id":557,"depth":131,"text":558},{"id":103,"depth":131,"text":104},"An IR rotary sootblower is a short, fixed-position rotating steam lance with permanently-installed nozzles. Unlike the IK long-retract design, the IR lance does not withdraw between operations — it rotates in place, projecting steam onto adjacent tube banks within its rotation radius.",{},[142,143,655],"air-heater",{"title":657,"description":658},"IR rotary sootblower — short rotating lance for air heaters and convective banks","An IR sootblower is a short fixed rotating lance with permanently-positioned nozzles. Common on air heaters and deeper convective banks; smaller than IK long retracts.",[660],{"title":150,"url":151},"glossary\u002Fir-rotary-sootblower","IrstHhTcdAMm6Uwt6MUrNzBrscTKxXs-G8HXxpnEGgY",{"id":664,"title":128,"aliases":665,"body":669,"category":780,"description":781,"extension":137,"meta":782,"navigation":139,"path":74,"relatedTerms":783,"seo":786,"sources":789,"stem":793,"term":128,"__hash__":794},"glossary\u002Fglossary\u002Fwaterwall.md",[666,667,668],"water wall","membrane wall","furnace wall",{"type":52,"value":670,"toc":773},[671,682,686,689,693,701,705,710,734,738,744,746],[55,672,673,676,677,681],{},[59,674,675],{},"Waterwalls"," are panels of vertical evaporator tubes welded into a gas-tight membrane that line the ",[67,678,680],{"href":679},"\u002Fglossary\u002Ffurnace","furnace"," walls of an industrial boiler. They absorb the radiant heat of the burning fuel and produce most of the boiler's steam.",[78,683,685],{"id":684},"construction","Construction",[55,687,688],{},"Adjacent tubes are connected by a thin steel fin running their full length, forming a continuous gas-tight pressure boundary. Tube diameters are typically 38–63 mm, on 50–80 mm pitches. Wall sections can be hung from headers above (suspension waterwalls) or supported from below (sit-on).",[78,690,692],{"id":691},"fouling-slag-not-ash","Fouling: slag, not ash",[55,694,695,696,700],{},"Furnace temperatures and radiant heat transfer mean that any ash that hits the waterwall is partly molten. Cooled rapidly against the tube wall, it solidifies as ",[67,697,699],{"href":698},"\u002Fglossary\u002Fslagging","slag",". Slag is hard, bonded, and grows in characteristic patterns: thicker near burner clusters, thinner in cold corners.",[78,702,704],{"id":703},"cleaning-waterwalls","Cleaning waterwalls",[55,706,707,709],{},[67,708,478],{"href":258}," are not effective on hard furnace slag — the deposit is too well-bonded for acoustic energy to dislodge. The standard cleaning tools are:",[83,711,712,720,725],{},[86,713,714,719],{},[59,715,716],{},[67,717,718],{"href":373},"Water cannons"," — high-pressure water lances mounted on the waterwall, fired at specific tube sections",[86,721,722,724],{},[59,723,217],{}," — short retract sootblowers with multiple nozzles",[86,726,727,733],{},[59,728,729],{},[67,730,732],{"href":731},"\u002Fglossary\u002Fexplosive-deslagging","Explosive deslagging"," — periodic shock cleaning for severe build-up",[78,735,737],{"id":736},"tube-failures-on-waterwalls","Tube failures on waterwalls",[55,739,740,743],{},[67,741,454],{"href":742},"\u002Fglossary\u002Ftube-erosion-tube-wastage"," and tube wastage on waterwalls are the leading cause of forced outages on coal-fired and biomass boilers. Mitigation is largely combustion-control rather than cleaning, but excessive aggressive cleaning (especially water cannons) contributes to thermal-fatigue cracking.",[78,745,104],{"id":103},[83,747,748,754,759,764,769],{},[86,749,750],{},[67,751,753],{"href":752},"\u002Fglossary\u002Fboiler","Boiler",[86,755,756],{},[67,757,758],{"href":679},"Furnace",[86,760,761],{},[67,762,763],{"href":698},"Slagging",[86,765,766],{},[67,767,768],{"href":742},"Tube erosion \u002F tube wastage",[86,770,771],{},[67,772,374],{"href":373},{"title":130,"searchDepth":131,"depth":131,"links":774},[775,776,777,778,779],{"id":684,"depth":131,"text":685},{"id":691,"depth":131,"text":692},{"id":703,"depth":131,"text":704},{"id":736,"depth":131,"text":737},{"id":103,"depth":131,"text":104},"boiler","Waterwalls are panels of vertical evaporator tubes welded into a gas-tight membrane that line the furnace walls of an industrial boiler. They absorb the radiant heat of the burning fuel and produce most of the boiler's steam.",{},[780,680,784,785,390],"slagging","tube-erosion-tube-wastage",{"title":787,"description":788},"Waterwall — tube panels lining the furnace of a boiler","Waterwalls are panels of vertical evaporator tubes welded into a gas-tight membrane that line the furnace. They absorb radiant heat and produce most of the boiler's steam.",[790],{"title":791,"url":792},"Wikipedia — Water-tube boiler","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWater-tube_boiler","glossary\u002Fwaterwall","rkJ624Wtxzhq9pJlFII6R5mMnwza1b97OTUWYv_7eng",1782613719152]