[{"data":1,"prerenderedAt":978},["ShallowReactive",2],{"site-footer-common":3,"glossary:online-vs-offline-cleaning":45,"glossary-related:online-vs-offline-cleaning":219},{"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":52,"category":197,"description":198,"extension":199,"meta":200,"navigation":201,"path":202,"relatedTerms":203,"seo":209,"sources":212,"stem":216,"term":217,"__hash__":218},"glossary\u002Fglossary\u002Fonline-vs-offline-cleaning.md","Online vs offline cleaning",[49,50,51],"online cleaning","offline cleaning","in-service cleaning",{"type":53,"value":54,"toc":189},"minimark",[55,66,71,109,113,148,152,159,163],[56,57,58,62,63,65],"p",{},[59,60,61],"strong",{},"Online cleaning"," happens during plant operation; ",[59,64,50],{}," requires shutdown. The choice between them is one of the central economic decisions in industrial maintenance because every offline cleaning campaign costs lost production.",[67,68,70],"h2",{"id":69},"online-cleaning-toolkit","Online cleaning toolkit",[72,73,74,82,89,95,102],"ul",{},[75,76,77],"li",{},[78,79,81],"a",{"href":80},"\u002Fglossary\u002Fsonic-horn","Sonic horns",[75,83,84,88],{},[78,85,87],{"href":86},"\u002Fglossary\u002Fsteam-sootblower","Steam sootblowers"," (all types)",[75,90,91],{},[78,92,94],{"href":93},"\u002Fglossary\u002Fwater-cannon","Water cannons",[75,96,97,101],{},[78,98,100],{"href":99},"\u002Fglossary\u002Fdetonation-cleaning","Detonation cleaning"," (limited)",[75,103,104,108],{},[78,105,107],{"href":106},"\u002Fglossary\u002Fshock-pulse-generator","Shock-pulse generator"," (recovery-boiler)",[67,110,112],{"id":111},"offline-cleaning-toolkit","Offline cleaning toolkit",[72,114,115,121,127,133,139,145],{},[75,116,117],{},[78,118,120],{"href":119},"\u002Fglossary\u002Fhydroblasting-offline","Hydroblasting",[75,122,123],{},[78,124,126],{"href":125},"\u002Fglossary\u002Fdry-ice-blasting","Dry-ice blasting",[75,128,129],{},[78,130,132],{"href":131},"\u002Fglossary\u002Fmanual-lancing","Manual lancing",[75,134,135],{},[78,136,138],{"href":137},"\u002Fglossary\u002Fwater-wash-recovery-boiler","Water wash",[75,140,141],{},[78,142,144],{"href":143},"\u002Fglossary\u002Fexplosive-deslagging","Explosive deslagging",[75,146,147],{},"Chemical cleaning (water-side)",[67,149,151],{"id":150},"the-economic-logic","The economic logic",[56,153,154,155,158],{},"Online cleaning is always cheaper per cleaning event than offline cleaning, because no production is lost. The strategic role of ",[78,156,157],{"href":80},"sonic horns",", steam sootblowers and water cannons is therefore to defer offline cleaning campaigns as long as possible — typically aiming for one offline campaign per planned outage cycle, with online cleaning carrying the load between.",[67,160,162],{"id":161},"related-terms","Related terms",[72,164,165,170,175,180,184],{},[75,166,167],{},[78,168,169],{"href":80},"Sonic horn",[75,171,172],{},[78,173,174],{"href":86},"Steam sootblower",[75,176,177],{},[78,178,179],{"href":137},"Water wash (recovery boiler)",[75,181,182],{},[78,183,126],{"href":125},[75,185,186],{},[78,187,188],{"href":119},"Hydroblasting (offline)",{"title":190,"searchDepth":191,"depth":191,"links":192},"",2,[193,194,195,196],{"id":69,"depth":191,"text":70},{"id":111,"depth":191,"text":112},{"id":150,"depth":191,"text":151},{"id":161,"depth":191,"text":162},"alternative-cleaning","Online cleaning happens during plant operation; offline cleaning requires shutdown. The choice between them is one of the central economic decisions in industrial maintenance because every offline cleaning campaign costs lost production.","md",{},true,"\u002Fglossary\u002Fonline-vs-offline-cleaning",[204,205,206,207,208],"sonic-horn","steam-sootblower","water-wash-recovery-boiler","dry-ice-blasting","hydroblasting-offline",{"title":210,"description":211},"Online vs offline cleaning — the central trade-off in industrial maintenance","Online cleaning happens during plant operation; offline cleaning requires shutdown. Sonic horns, sootblowers and water cannons are online; water washes, dry-ice and hydroblasting are offline.",[213],{"title":214,"url":215},"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\u002Fonline-vs-offline-cleaning","Online and offline cleaning","-asyWvoa8Ikjo7HZnLsh3CbYTLjLCSN_v3O9dmezFEs",[220,462,703,824,904],{"id":221,"title":169,"aliases":222,"body":225,"category":437,"description":438,"extension":199,"meta":439,"navigation":201,"path":80,"relatedTerms":440,"seo":447,"sources":450,"stem":460,"term":169,"__hash__":461},"glossary\u002Fglossary\u002Fsonic-horn.md",[157,223,224],"sonic cleaning horn","industrial sonic horn",{"type":53,"value":226,"toc":430},[227,262,266,274,278,346,350,387,391,398,400],[56,228,229,230,233,234,238,239,243,244,243,248,243,252,256,257,261],{},"A ",[59,231,232],{},"sonic horn"," is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of ",[78,235,237],{"href":236},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[78,240,242],{"href":241},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",", ",[78,245,247],{"href":246},"\u002Fglossary\u002Ffabric-filter","baghouses",[78,249,251],{"href":250},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[78,253,255],{"href":254},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces"," and ",[78,258,260],{"href":259},"\u002Fglossary\u002Fhopper","hoppers and silos",".",[67,263,265],{"id":264},"how-a-sonic-horn-works","How a sonic horn works",[56,267,268,269,273],{},"Compressed plant air admitted through a ",[78,270,272],{"href":271},"\u002Fglossary\u002Fsolenoid-valve","solenoid valve"," drives a metal diaphragm — typically titanium or 316 stainless — into resonant oscillation at the horn's fundamental frequency. The oscillating pressure field is amplified by an exponential bell horn and projected into the vessel as a near-spherical sound wave. Particulate already deposited on internal surfaces receives an oscillating acceleration that overcomes adhesion; loosened material is then carried out with the gas flow before it can sinter, bridge or bond. Because the cleaning is acoustic and non-contact, the horn can fire while the plant is online without tube erosion, refractory damage or thermal shock.",[67,275,277],{"id":276},"key-parameters","Key parameters",[279,280,281,294],"table",{},[282,283,284],"thead",{},[285,286,287,291],"tr",{},[288,289,290],"th",{},"Parameter",[288,292,293],{},"Typical range",[295,296,297,306,314,322,330,338],"tbody",{},[285,298,299,303],{},[300,301,302],"td",{},"Fundamental frequency",[300,304,305],{},"60–400 Hz",[285,307,308,311],{},[300,309,310],{},"Sound pressure level",[300,312,313],{},"140–180 dB",[285,315,316,319],{},[300,317,318],{},"Compressed-air consumption",[300,320,321],{},"8–14 Nm³\u002Fmin at 4–7 bar",[285,323,324,327],{},[300,325,326],{},"Operating temperature (with appropriate materials)",[300,328,329],{},"−40 °C to +500 °C",[285,331,332,335],{},[300,333,334],{},"Firing cycle",[300,336,337],{},"5–15 s burst, repeated every 3–15 minutes",[285,339,340,343],{},[300,341,342],{},"Mass",[300,344,345],{},"15–60 kg depending on horn size",[67,347,349],{"id":348},"frequency-selection","Frequency selection",[56,351,352,353,243,357,361,362,243,366,370,371,243,374,378,379,256,383,261],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[78,354,356],{"href":355},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[78,358,360],{"href":359},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[78,363,365],{"href":364},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[78,367,369],{"href":368},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[78,372,373],{"href":246},"fabric-filter compartments",[78,375,377],{"href":376},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[78,380,382],{"href":381},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[78,384,386],{"href":385},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[67,388,390],{"id":389},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[56,392,393,394,397],{},"Sonic horns are increasingly specified alongside or in place of ",[78,395,396],{"href":86},"steam sootblowers"," because they consume no boiler-grade steam, cause no tube erosion, require almost no moving parts and can fire every few minutes without operator intervention. They are less effective on hard, fused slag than retractable steam lances, so on furnace waterwalls and high-temperature superheaters they typically complement rather than replace mechanical cleaning.",[67,399,162],{"id":161},[72,401,402,407,413,419,425],{},[75,403,404],{},[78,405,406],{"href":236},"Acoustic cleaner",[75,408,409],{},[78,410,412],{"href":411},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[75,414,415],{},[78,416,418],{"href":417},"\u002Fglossary\u002Fbell-horn","Bell horn",[75,420,421],{},[78,422,424],{"href":423},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[75,426,427],{},[78,428,429],{"href":381},"Low-frequency acoustic cleaner",{"title":190,"searchDepth":191,"depth":191,"links":431},[432,433,434,435,436],{"id":264,"depth":191,"text":265},{"id":276,"depth":191,"text":277},{"id":348,"depth":191,"text":349},{"id":389,"depth":191,"text":390},{"id":161,"depth":191,"text":162},"core-technology","A sonic horn is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of acoustic cleaner and the default specification for cleaning ESPs, baghouses, SCR catalysts, boiler heat-transfer surfaces and hoppers and silos.",{},[441,442,443,444,445,446],"acoustic-cleaner","acoustic-cleaning-system","sonic-sootblower","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":448,"description":449},"Sonic horn — definition, frequency, SPL and industrial applications","A sonic horn is a pneumatically-driven low-frequency sound emitter (typically 60–400 Hz at 140–180 dB SPL) used to dislodge particulate fouling from boilers, ESPs, baghouses and process vessels.",[451,454,457],{"title":452,"url":453},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":455,"url":456},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":458,"url":459},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",{"id":463,"title":174,"aliases":464,"body":468,"category":197,"description":686,"extension":199,"meta":687,"navigation":201,"path":86,"relatedTerms":688,"seo":693,"sources":696,"stem":701,"term":174,"__hash__":702},"glossary\u002Fglossary\u002Fsteam-sootblower.md",[465,466,467],"sootblower","steam soot blower","steam blower",{"type":53,"value":469,"toc":680},[470,476,480,543,547,638,642,648,650],[56,471,229,472,475],{},[59,473,474],{},"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.",[67,477,479],{"id":478},"types","Types",[279,481,482,492],{},[282,483,484],{},[285,485,486,489],{},[288,487,488],{},"Type",[288,490,491],{},"Use case",[295,493,494,505,516,524,535],{},[285,495,496,502],{},[300,497,498],{},[78,499,501],{"href":500},"\u002Fglossary\u002Fik-long-retract-sootblower","IK (long retract)",[300,503,504],{},"Convective superheater, reheater, generating bank",[285,506,507,513],{},[300,508,509],{},[78,510,512],{"href":511},"\u002Fglossary\u002Fir-rotary-sootblower","IR (rotary)",[300,514,515],{},"Air heater, deep convective banks",[285,517,518,521],{},[300,519,520],{},"Wall blowers",[300,522,523],{},"Furnace waterwalls, short reach",[285,525,526,532],{},[300,527,528],{},[78,529,531],{"href":530},"\u002Fglossary\u002Fretract-sootblower","Retractable",[300,533,534],{},"High-temperature service, withdrawn between uses",[285,536,537,540],{},[300,538,539],{},"Fixed",[300,541,542],{},"Air heaters, smaller industrial duty",[67,544,546],{"id":545},"trade-offs-vs-sonic-horns","Trade-offs vs sonic horns",[279,548,549,562],{},[282,550,551],{},[285,552,553,556,558],{},[288,554,555],{},"Attribute",[288,557,174],{},[288,559,560],{},[78,561,169],{"href":80},[295,563,564,575,586,597,608,619,629],{},[285,565,566,569,572],{},[300,567,568],{},"Cleaning medium",[300,570,571],{},"High-pressure steam jet",[300,573,574],{},"Pulsed sound",[285,576,577,580,583],{},[300,578,579],{},"Tube erosion risk",[300,581,582],{},"Documented",[300,584,585],{},"None",[285,587,588,591,594],{},[300,589,590],{},"Steam \u002F energy consumption",[300,592,593],{},"Significant boiler steam",[300,595,596],{},"Plant compressed air only",[285,598,599,602,605],{},[300,600,601],{},"Frequency",[300,603,604],{},"Per shift typical",[300,606,607],{},"Every few minutes",[285,609,610,613,616],{},[300,611,612],{},"Effective on bonded slag",[300,614,615],{},"Yes",[300,617,618],{},"No",[285,620,621,624,626],{},[300,622,623],{},"Effective on dry friable deposits",[300,625,615],{},[300,627,628],{},"Yes (and earlier in the consolidation cycle)",[285,630,631,634,636],{},[300,632,633],{},"Moving parts in flue gas",[300,635,615],{},[300,637,585],{},[67,639,641],{"id":640},"position-in-modern-cleaning-practice","Position in modern cleaning practice",[56,643,644,645,647],{},"Modern practice typically combines both: steam sootblowers for periodic deeper cleaning, ",[78,646,157],{"href":80}," for continuous prevention between sootblower cycles. The combination outperforms either alone on most convective-pass duty.",[67,649,162],{"id":161},[72,651,652,656,661,666,671,676],{},[75,653,654],{},[78,655,412],{"href":411},[75,657,658],{},[78,659,660],{"href":500},"IK long retract sootblower",[75,662,663],{},[78,664,665],{"href":511},"IR rotary sootblower",[75,667,668],{},[78,669,670],{"href":530},"Retract sootblower",[75,672,673],{},[78,674,675],{"href":93},"Water cannon",[75,677,678],{},[78,679,169],{"href":80},{"title":190,"searchDepth":191,"depth":191,"links":681},[682,683,684,685],{"id":478,"depth":191,"text":479},{"id":545,"depth":191,"text":546},{"id":640,"depth":191,"text":641},{"id":161,"depth":191,"text":162},"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.",{},[443,689,690,691,692,204],"ik-long-retract-sootblower","ir-rotary-sootblower","retract-sootblower","water-cannon",{"title":694,"description":695},"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.",[697,700],{"title":698,"url":699},"Wikipedia — Soot blower","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSoot_blower",{"title":214,"url":215},"glossary\u002Fsteam-sootblower","XD3SJC43DwsBLNSvsJdGRtCtrjPlwojM--cj2MByKQo",{"id":704,"title":179,"aliases":705,"body":709,"category":810,"description":811,"extension":199,"meta":812,"navigation":201,"path":137,"relatedTerms":813,"seo":815,"sources":818,"stem":822,"term":179,"__hash__":823},"glossary\u002Fglossary\u002Fwater-wash-recovery-boiler.md",[706,707,708],"recovery boiler water wash","water washing","hydroblasting (recovery)",{"type":53,"value":710,"toc":804},[711,740,743,746,764,768,771,775,781,783],[56,712,229,713,716,717,720,721,243,724,256,728,732,733,256,735,739],{},[59,714,715],{},"water wash"," on a ",[78,718,719],{"href":359},"recovery boiler"," is the offline cleaning campaign performed during a full boiler shutdown, using high-pressure water lances to remove consolidated deposits from ",[78,722,723],{"href":254},"superheater",[78,725,727],{"href":726},"\u002Fglossary\u002Fgenerating-bank","generating-bank",[78,729,731],{"href":730},"\u002Fglossary\u002Feconomiser","economiser"," tubes that in-service ",[78,734,157],{"href":80},[78,736,738],{"href":737},"\u002Fglossary\u002Fchill-and-blow","chill-and-blow"," could not remove.",[67,741,601],{"id":742},"frequency",[56,744,745],{},"Mills target intervals of 18–36 months between water-wash campaigns, depending on:",[72,747,748,751,754,761],{},[75,749,750],{},"Boiler design and age",[75,752,753],{},"Black-liquor solids loading",[75,755,756,757,760],{},"Effectiveness of continuous cleaning (sonic horns, ",[78,758,759],{"href":500},"IK sootblowers",")",[75,762,763],{},"BLRBAC inspection programme",[67,765,767],{"id":766},"cost-of-a-water-wash","Cost of a water wash",[56,769,770],{},"A water-wash campaign typically takes 5–10 days of full boiler shutdown — multi-million-dollar lost production — plus the labour and consumables of the cleaning itself. Every additional month between water-washes is therefore worth substantial money to the mill operator.",[67,772,774],{"id":773},"how-sonic-horns-extend-the-water-wash-interval","How sonic horns extend the water-wash interval",[56,776,777,778,780],{},"Continuous ",[78,779,204],{"href":80}," cleaning during operation prevents the deepest, hardest deposits from forming. Plants commonly report water-wash interval extension from 18 months to 24+ months after retrofitting horns to a previously sootblower-only recovery boiler.",[67,782,162],{"id":161},[72,784,785,790,795,800],{},[75,786,787],{},[78,788,789],{"href":359},"Recovery boiler",[75,791,792],{},[78,793,794],{"href":737},"Chill-and-blow",[75,796,797],{},[78,798,799],{"href":254},"Superheater",[75,801,802],{},[78,803,169],{"href":80},{"title":190,"searchDepth":191,"depth":191,"links":805},[806,807,808,809],{"id":742,"depth":191,"text":601},{"id":766,"depth":191,"text":767},{"id":773,"depth":191,"text":774},{"id":161,"depth":191,"text":162},"pulp-paper","A water wash on a recovery boiler is the offline cleaning campaign performed during a full boiler shutdown, using high-pressure water lances to remove consolidated deposits from superheater, generating-bank and economiser tubes that in-service sonic horns and chill-and-blow could not remove.",{},[814,738,723,204],"recovery-boiler",{"title":816,"description":817},"Water wash (recovery boiler) — offline high-pressure cleaning campaign","A water wash is the offline cleaning campaign performed during recovery-boiler shutdowns, using high-pressure water to remove deposits that in-service cleaning cannot reach.",[819],{"title":820,"url":821},"Valmet — Recovery Boiler Cleaning","https:\u002F\u002Fwww.valmet.com\u002Finsights\u002Farticles\u002Fup-and-running\u002Fnew-technology\u002FFPWashX\u002F","glossary\u002Fwater-wash-recovery-boiler","rX-p3SRsB-4pGFR0cei_CBc6DRSim1vUWzK-yxwuAE8",{"id":825,"title":826,"aliases":827,"body":831,"category":197,"description":891,"extension":199,"meta":892,"navigation":201,"path":125,"relatedTerms":893,"seo":895,"sources":898,"stem":902,"term":126,"__hash__":903},"glossary\u002Fglossary\u002Fdry-ice-blasting.md","Dry-ice blasting (CO₂)",[828,829,830],"CO2 blasting","dry ice blasting","solid CO2 blasting",{"type":53,"value":832,"toc":886},[833,838,842,856,860,874,876],[56,834,835,837],{},[59,836,126],{}," projects solid CO₂ pellets at supersonic velocity onto a surface. The pellets impact, sublimate from solid to gas on contact (absorbing local heat and producing thermal shock), and lift the deposit off the surface. The only secondary waste is the dislodged material itself — the dry ice converts entirely to CO₂ gas.",[67,839,841],{"id":840},"industrial-uses","Industrial uses",[72,843,844,847,850,853],{},[75,845,846],{},"Offline cleaning of boiler internals during major outages",[75,848,849],{},"Cement-plant cooler internals",[75,851,852],{},"Heat-exchanger external cleaning",[75,854,855],{},"General industrial surface cleaning where wet cleaning is undesirable",[67,857,859],{"id":858},"position-vs-sonic-horns","Position vs sonic horns",[56,861,862,863,866,867,869,870,873],{},"Dry-ice blasting is an ",[59,864,865],{},"offline"," technology — the boiler must be shut down and cooled, operators must access the cleaning area, and the cleaning happens during a planned outage window. ",[78,868,81],{"href":80}," are ",[59,871,872],{},"online"," technology that cleans during operation. The two technologies serve different points in the maintenance cycle and do not directly compete.",[67,875,162],{"id":161},[72,877,878,882],{},[75,879,880],{},[78,881,188],{"href":119},[75,883,884],{},[78,885,132],{"href":131},{"title":190,"searchDepth":191,"depth":191,"links":887},[888,889,890],{"id":840,"depth":191,"text":841},{"id":858,"depth":191,"text":859},{"id":161,"depth":191,"text":162},"Dry-ice blasting projects solid CO₂ pellets at supersonic velocity onto a surface. The pellets impact, sublimate from solid to gas on contact (absorbing local heat and producing thermal shock), and lift the deposit off the surface. The only secondary waste is the dislodged material itself — the dry ice converts entirely to CO₂ gas.",{},[208,894],"manual-lancing",{"title":896,"description":897},"Dry-ice blasting — solid-CO2 abrasive cleaning leaving no secondary waste","Dry-ice blasting projects solid CO2 pellets onto a surface; the pellets sublimate on impact, leaving only the dislodged material as secondary waste. Common for offline boiler cleaning.",[899],{"title":900,"url":901},"Wikipedia — Dry-ice blasting","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDry-ice_blasting","glossary\u002Fdry-ice-blasting","pRelFwz5EmgMFPFRNl8PPpFB5jofASjJPivAtyC1KPU",{"id":905,"title":188,"aliases":906,"body":910,"category":197,"description":965,"extension":199,"meta":966,"navigation":201,"path":119,"relatedTerms":967,"seo":968,"sources":971,"stem":975,"term":976,"__hash__":977},"glossary\u002Fglossary\u002Fhydroblasting-offline.md",[907,908,909],"hydroblasting","hydro blasting","high-pressure water cleaning",{"type":53,"value":911,"toc":960},[912,917,919,936,938,944,946],[56,913,914,916],{},[59,915,120],{}," uses high-pressure water (typically 700–2,000 bar at the nozzle) to remove hardened deposits from boiler tubes, heat-exchanger surfaces, and process-equipment internals during planned outages. Hydroblasting is the standard offline cleaning method for deposits beyond the reach of online cleaning systems.",[67,918,841],{"id":840},[72,920,921,927,930,933],{},[75,922,923,926],{},[78,924,925],{"href":137},"Recovery-boiler water washes"," — periodic deep cleaning campaigns",[75,928,929],{},"Heat-exchanger off-line tube cleaning",[75,931,932],{},"Refining furnace radiant-tube decoking adjunct",[75,934,935],{},"Cement-plant preheater and kiln-inlet manual cleaning",[67,937,859],{"id":858},[56,939,940,941,943],{},"Hydroblasting is offline (requires shutdown), labour-intensive, and addresses deposits that have already consolidated into hard, bonded layers. ",[78,942,81],{"href":80}," are online, automatic, and prevent the consolidation that would otherwise require hydroblasting. Most plants run both: continuous acoustic cleaning extends the interval between hydroblasting campaigns, often doubling the campaign-to-campaign run time.",[67,945,162],{"id":161},[72,947,948,952,956],{},[75,949,950],{},[78,951,179],{"href":137},[75,953,954],{},[78,955,126],{"href":125},[75,957,958],{},[78,959,132],{"href":131},{"title":190,"searchDepth":191,"depth":191,"links":961},[962,963,964],{"id":840,"depth":191,"text":841},{"id":858,"depth":191,"text":859},{"id":161,"depth":191,"text":162},"Hydroblasting uses high-pressure water (typically 700–2,000 bar at the nozzle) to remove hardened deposits from boiler tubes, heat-exchanger surfaces, and process-equipment internals during planned outages. Hydroblasting is the standard offline cleaning method for deposits beyond the reach of online cleaning systems.",{},[206,207,894],{"title":969,"description":970},"Hydroblasting — offline high-pressure water cleaning of boiler internals","Hydroblasting uses high-pressure water (typically 700–2,000 bar) to remove hardened deposits from boiler tubes and process equipment during planned outages.",[972],{"title":973,"url":974},"Wikipedia — Water blasting","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWater_blasting","glossary\u002Fhydroblasting-offline","Hydroblasting (offline cleaning)","SNPynlovB3D-a9r5kizOqPr6G0FG4mMnqAd33DsRTjM",1782613719142]