[{"data":1,"prerenderedAt":622},["ShallowReactive",2],{"site-footer-common":3,"glossary:explosive-deslagging":45,"glossary-related:explosive-deslagging":182},{"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":163,"description":164,"extension":165,"meta":166,"navigation":167,"path":168,"relatedTerms":169,"seo":173,"sources":176,"stem":180,"term":47,"__hash__":181},"glossary\u002Fglossary\u002Fexplosive-deslagging.md","Explosive deslagging",[49,50,51],"explosive cleaning","controlled-detonation cleaning","dynamite deslagging",{"type":53,"value":54,"toc":156},"minimark",[55,78,83,96,100,126,133,137],[56,57,58,61,62,67,68,72,73,77],"p",{},[59,60,47],"strong",{}," uses controlled charges of solid explosive to fragment severe boiler slag during planned outages. Specialist contractor crews place charges in defined positions on accumulated slag masses; the detonation cracks the slag into manageable fragments that can then be removed manually or by mechanical equipment. Explosive deslagging is reserved for the toughest cases — where ",[63,64,66],"a",{"href":65},"\u002Fglossary\u002Fwater-cannon","water cannons",", ",[63,69,71],{"href":70},"\u002Fglossary\u002Fsteam-sootblower","steam sootblowers"," and ",[63,74,76],{"href":75},"\u002Fglossary\u002Fdetonation-cleaning","detonation cleaning"," have all failed to control slag during operation.",[79,80,82],"h2",{"id":81},"why-it-persists","Why it persists",[84,85,86,90,93],"ul",{},[87,88,89],"li",{},"Some severely-fouled boilers cannot be returned to service without explosive intervention",[87,91,92],{},"The economic alternative (extended manual cleaning, or boiler scrap-out) is worse",[87,94,95],{},"Specialist contractors maintain the niche expertise",[79,97,99],{"id":98},"trade-offs","Trade-offs",[84,101,102,108,114,120],{},[87,103,104,107],{},[59,105,106],{},"Permit burden"," — explosive handling, transport and use are heavily regulated",[87,109,110,113],{},[59,111,112],{},"Operator HSE risk"," — explosive work in a confined boiler shell",[87,115,116,119],{},[59,117,118],{},"Refractory and tube damage potential"," — over-charging risks structural damage",[87,121,122,125],{},[59,123,124],{},"Insurance complexity"," — many insurers view explosive cleaning as elevated risk",[56,127,128,132],{},[63,129,131],{"href":130},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," installed during normal operation reduce the slag accumulation that would otherwise eventually require explosive intervention. Plants with explosive-deslagging history are particularly receptive to acoustic-horn proposals.",[79,134,136],{"id":135},"related-terms","Related terms",[84,138,139,144,150],{},[87,140,141],{},[63,142,143],{"href":75},"Detonation cleaning",[87,145,146],{},[63,147,149],{"href":148},"\u002Fglossary\u002Fslagging","Slagging",[87,151,152],{},[63,153,155],{"href":154},"\u002Fglossary\u002Fwaterwall","Waterwall",{"title":157,"searchDepth":158,"depth":158,"links":159},"",2,[160,161,162],{"id":81,"depth":158,"text":82},{"id":98,"depth":158,"text":99},{"id":135,"depth":158,"text":136},"alternative-cleaning","Explosive deslagging uses controlled charges of solid explosive to fragment severe boiler slag during planned outages. Specialist contractor crews place charges in defined positions on accumulated slag masses; the detonation cracks the slag into manageable fragments that can then be removed manually or by mechanical equipment. Explosive deslagging is reserved for the toughest cases — where water cannons, steam sootblowers and detonation cleaning have all failed to control slag during operation.","md",{},true,"\u002Fglossary\u002Fexplosive-deslagging",[170,171,172],"detonation-cleaning","slagging","waterwall",{"title":174,"description":175},"Explosive deslagging — controlled-explosive cleaning of severely-slagged boilers","Explosive deslagging uses controlled charges of solid explosive to fragment severe boiler slag during outages. Specialised contractor service; permit-heavy; for the toughest cases.",[177],{"title":178,"url":179},"Power Engineering — How to Deal with Ceaseless Slagging","https:\u002F\u002Fwww.power-eng.com\u002Foperations-maintenance\u002Fhow-to-deal-with-ceaseless-slagging\u002F","glossary\u002Fexplosive-deslagging","NsDARvUySn6eIBzaXoPgSCpTtMQeCn-gSGWBEYATaeg",[183,341,496],{"id":184,"title":143,"aliases":185,"body":189,"category":163,"description":326,"extension":165,"meta":327,"navigation":167,"path":75,"relatedTerms":328,"seo":332,"sources":335,"stem":339,"term":143,"__hash__":340},"glossary\u002Fglossary\u002Fdetonation-cleaning.md",[186,187,188],"shock wave cleaning","pulse detonation cleaning","Bang & Clean",{"type":53,"value":190,"toc":322},[191,207,211,301,304,306],[56,192,193,195,196,198,199,67,203,206],{},[59,194,143],{}," uses a controlled pulse-detonation device — a small chamber where a gaseous fuel-air mixture is ignited — to generate high-energy shock waves projected into the boiler. The shock waves dislodge consolidated deposits that lighter cleaning methods cannot remove. The best-known commercial offering is the Swiss-based ",[59,197,188],{}," system, marketed primarily for ",[63,200,202],{"href":201},"\u002Fglossary\u002Fwaste-to-energy","WtE",[63,204,205],{"href":201},"biomass",", and lignite-fired boilers with persistent fouling.",[79,208,210],{"id":209},"trade-offs-vs-sonic-horns","Trade-offs vs sonic horns",[212,213,214,231],"table",{},[215,216,217],"thead",{},[218,219,220,224,226],"tr",{},[221,222,223],"th",{},"Attribute",[221,225,143],{},[221,227,228],{},[63,229,230],{"href":130},"Sonic horn",[232,233,234,246,257,268,279,290],"tbody",{},[218,235,236,240,243],{},[237,238,239],"td",{},"Energy per shot",[237,241,242],{},"Very high",[237,244,245],{},"Low",[218,247,248,251,254],{},[237,249,250],{},"Frequency",[237,252,253],{},"Episodic (per shift)",[237,255,256],{},"Continuous (every few minutes)",[218,258,259,262,265],{},[237,260,261],{},"Damage potential",[237,263,264],{},"Documented on weld points if mis-targeted",[237,266,267],{},"None",[218,269,270,273,276],{},[237,271,272],{},"Capital cost per unit",[237,274,275],{},"Higher",[237,277,278],{},"Lower",[218,280,281,284,287],{},[237,282,283],{},"Best application",[237,285,286],{},"Hard consolidated deposits, periodic remediation",[237,288,289],{},"Continuous prevention",[218,291,292,295,298],{},[237,293,294],{},"Operator presence required",[237,296,297],{},"Yes for each shot",[237,299,300],{},"No, fully automatic",[56,302,303],{},"The two technologies are complementary: sonic horns prevent the buildup that detonation cleaning is otherwise needed to remove, allowing detonation cycles to be reduced in frequency.",[79,305,136],{"id":135},[84,307,308,312,318],{},[87,309,310],{},[63,311,47],{"href":168},[87,313,314],{},[63,315,317],{"href":316},"\u002Fglossary\u002Fshock-pulse-generator","Shock-pulse generator",[87,319,320],{},[63,321,230],{"href":130},{"title":157,"searchDepth":158,"depth":158,"links":323},[324,325],{"id":209,"depth":158,"text":210},{"id":135,"depth":158,"text":136},"Detonation cleaning uses a controlled pulse-detonation device — a small chamber where a gaseous fuel-air mixture is ignited — to generate high-energy shock waves projected into the boiler. The shock waves dislodge consolidated deposits that lighter cleaning methods cannot remove. The best-known commercial offering is the Swiss-based Bang & Clean system, marketed primarily for WtE, biomass, and lignite-fired boilers with persistent fouling.",{},[329,330,331],"explosive-deslagging","shock-pulse-generator","sonic-horn",{"title":333,"description":334},"Detonation cleaning — controlled shock-wave cleaning of boiler internals","Detonation cleaning uses a controlled pulse-detonation device to generate high-energy shock waves that dislodge boiler deposits. Best-known commercial offering is Bang & Clean.",[336],{"title":337,"url":338},"Energy Central — Comparison of Online Backpass Cleaning Technologies","https:\u002F\u002Fenergycentral.com\u002Fc\u002Fgn\u002Fcomparison-online-backpass-cleaning-technologies-detonation-acoustic-and","glossary\u002Fdetonation-cleaning","_e6HnLwjNKMF5qkDU4-Je3xe3q9P-QpVIt8IjJnshn8",{"id":342,"title":149,"aliases":343,"body":347,"category":371,"description":485,"extension":165,"meta":486,"navigation":167,"path":148,"relatedTerms":487,"seo":489,"sources":492,"stem":494,"term":149,"__hash__":495},"glossary\u002Fglossary\u002Fslagging.md",[344,345,346],"slag deposit","slag bonding","molten slag deposit",{"type":53,"value":348,"toc":480},[349,373,377,391,395,448,453,455],[56,350,351,353,354,358,359,362,363,367,368,372],{},[59,352,149],{}," is the deposition of molten or semi-molten ash on high-temperature surfaces inside a boiler — primarily the ",[63,355,357],{"href":356},"\u002Fglossary\u002Ffurnace","furnace"," ",[63,360,361],{"href":154},"waterwalls"," and the finishing ",[63,364,366],{"href":365},"\u002Fglossary\u002Fsuperheater","superheater",". Slag is distinguished from ",[63,369,371],{"href":370},"\u002Fglossary\u002Ffouling","fouling"," generally by being formed at temperatures high enough to melt the ash; once cooled against the tube it solidifies as a hard, bonded layer.",[79,374,376],{"id":375},"why-slag-is-hard-to-clean","Why slag is hard to clean",[84,378,379,382,385,388],{},[87,380,381],{},"Bonded directly to the tube — not a loose surface deposit",[87,383,384],{},"Hardness comparable to the tube metal itself",[87,386,387],{},"Resists acoustic cleaning — sound energy cannot dislodge a bonded interface",[87,389,390],{},"Removable only with high-energy mechanical methods",[79,392,394],{"id":393},"cleaning-options","Cleaning options",[212,396,397,407],{},[215,398,399],{},[218,400,401,404],{},[221,402,403],{},"Tool",[221,405,406],{},"Use case",[232,408,409,419,431,440],{},[218,410,411,416],{},[237,412,413],{},[63,414,415],{"href":65},"Water cannon",[237,417,418],{},"Standard for furnace waterwall slag",[218,420,421,428],{},[237,422,423,424],{},"Steam ",[63,425,427],{"href":426},"\u002Fglossary\u002Fretract-sootblower","retract sootblower",[237,429,430],{},"Finishing superheater slag, with care for tube erosion",[218,432,433,437],{},[237,434,435],{},[63,436,47],{"href":168},[237,438,439],{},"Severe build-up, periodic intervention",[218,441,442,445],{},[237,443,444],{},"Manual lancing (offline)",[237,446,447],{},"During major outages",[56,449,450,452],{},[63,451,131],{"href":130}," are not effective on furnace slag, but they are effective immediately downstream where deposits cool to a friable consistency. Sylio's value on slag-prone units lies in the convective pass, not in the furnace itself.",[79,454,136],{"id":135},[84,456,457,461,466,471,476],{},[87,458,459],{},[63,460,155],{"href":154},[87,462,463],{},[63,464,465],{"href":365},"Superheater",[87,467,468],{},[63,469,470],{"href":356},"Furnace",[87,472,473],{},[63,474,475],{"href":370},"Fouling",[87,477,478],{},[63,479,415],{"href":65},{"title":157,"searchDepth":158,"depth":158,"links":481},[482,483,484],{"id":375,"depth":158,"text":376},{"id":393,"depth":158,"text":394},{"id":135,"depth":158,"text":136},"Slagging is the deposition of molten or semi-molten ash on high-temperature surfaces inside a boiler — primarily the furnace waterwalls and the finishing superheater. Slag is distinguished from fouling generally by being formed at temperatures high enough to melt the ash; once cooled against the tube it solidifies as a hard, bonded layer.",{},[172,366,357,371,488],"water-cannon",{"title":490,"description":491},"Slagging — molten ash bonding to high-temperature boiler surfaces","Slagging is the deposition of molten or semi-molten ash on radiant and high-temperature surfaces in the boiler furnace. Hard, bonded; usually requires water cannons or explosive deslagging.",[493],{"title":178,"url":179},"glossary\u002Fslagging","ETHZyOpE6ep9L5Ko6HI45eGDis7f8SAGpAWqJo3Z414",{"id":497,"title":155,"aliases":498,"body":502,"category":608,"description":609,"extension":165,"meta":610,"navigation":167,"path":154,"relatedTerms":611,"seo":613,"sources":616,"stem":620,"term":155,"__hash__":621},"glossary\u002Fglossary\u002Fwaterwall.md",[499,500,501],"water wall","membrane wall","furnace wall",{"type":53,"value":503,"toc":601},[504,513,517,520,524,531,535,540,563,567,574,576],[56,505,506,509,510,512],{},[59,507,508],{},"Waterwalls"," are panels of vertical evaporator tubes welded into a gas-tight membrane that line the ",[63,511,357],{"href":356}," walls of an industrial boiler. They absorb the radiant heat of the burning fuel and produce most of the boiler's steam.",[79,514,516],{"id":515},"construction","Construction",[56,518,519],{},"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).",[79,521,523],{"id":522},"fouling-slag-not-ash","Fouling: slag, not ash",[56,525,526,527,530],{},"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 ",[63,528,529],{"href":148},"slag",". Slag is hard, bonded, and grows in characteristic patterns: thicker near burner clusters, thinner in cold corners.",[79,532,534],{"id":533},"cleaning-waterwalls","Cleaning waterwalls",[56,536,537,539],{},[63,538,131],{"href":130}," are not effective on hard furnace slag — the deposit is too well-bonded for acoustic energy to dislodge. The standard cleaning tools are:",[84,541,542,550,556],{},[87,543,544,549],{},[59,545,546],{},[63,547,548],{"href":65},"Water cannons"," — high-pressure water lances mounted on the waterwall, fired at specific tube sections",[87,551,552,555],{},[59,553,554],{},"Wall blowers"," — short retract sootblowers with multiple nozzles",[87,557,558,562],{},[59,559,560],{},[63,561,47],{"href":168}," — periodic shock cleaning for severe build-up",[79,564,566],{"id":565},"tube-failures-on-waterwalls","Tube failures on waterwalls",[56,568,569,573],{},[63,570,572],{"href":571},"\u002Fglossary\u002Ftube-erosion-tube-wastage","Tube erosion"," 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.",[79,575,136],{"id":135},[84,577,578,584,588,592,597],{},[87,579,580],{},[63,581,583],{"href":582},"\u002Fglossary\u002Fboiler","Boiler",[87,585,586],{},[63,587,470],{"href":356},[87,589,590],{},[63,591,149],{"href":148},[87,593,594],{},[63,595,596],{"href":571},"Tube erosion \u002F tube wastage",[87,598,599],{},[63,600,415],{"href":65},{"title":157,"searchDepth":158,"depth":158,"links":602},[603,604,605,606,607],{"id":515,"depth":158,"text":516},{"id":522,"depth":158,"text":523},{"id":533,"depth":158,"text":534},{"id":565,"depth":158,"text":566},{"id":135,"depth":158,"text":136},"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.",{},[608,357,171,612,488],"tube-erosion-tube-wastage",{"title":614,"description":615},"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.",[617],{"title":618,"url":619},"Wikipedia — Water-tube boiler","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWater-tube_boiler","glossary\u002Fwaterwall","rkJ624Wtxzhq9pJlFII6R5mMnwza1b97OTUWYv_7eng",1782613719086]