[{"data":1,"prerenderedAt":550},["ShallowReactive",2],{"site-footer-common":3,"glossary:blrbac":45,"glossary-related:blrbac":169},{"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":148,"description":149,"extension":150,"meta":151,"navigation":152,"path":153,"relatedTerms":154,"seo":157,"sources":160,"stem":167,"term":47,"__hash__":168},"glossary\u002Fglossary\u002Fblrbac.md","BLRBAC",[49,50],"Black Liquor Recovery Boiler Advisory Committee","BLRBAC Recommended Good Practices",{"type":52,"value":53,"toc":141},"minimark",[54,67,72,80,102,106,119,123],[55,56,57,60,61,66],"p",{},[58,59,47],"strong",{}," (the Black Liquor Recovery Boiler Advisory Committee) is a non-profit industry advisory body that publishes Recommended Good Practices governing the safe operation of kraft ",[62,63,65],"a",{"href":64},"\u002Fglossary\u002Frecovery-boiler","recovery boilers",". Member mills participate voluntarily but membership and adherence are effectively universal across the North American kraft industry, with international mills adopting BLRBAC standards as best practice.",[68,69,71],"h2",{"id":70},"why-blrbac-matters","Why BLRBAC matters",[55,73,74,75,79],{},"Recovery boilers carry unique safety risks — primarily smelt-water explosions from any contact between molten ",[62,76,78],{"href":77},"\u002Fglossary\u002Fsmelt","smelt"," and water. BLRBAC Recommended Good Practices cover:",[81,82,83,87,90,93,96,99],"ul",{},[84,85,86],"li",{},"Emergency shutdown procedures (ESP)",[84,88,89],{},"Water-side incident protocols",[84,91,92],{},"Auxiliary fuel firing",[84,94,95],{},"Sootblowing system design",[84,97,98],{},"Inspection programmes",[84,100,101],{},"Combustion control",[68,103,105],{"id":104},"implications-for-cleaning-system-changes","Implications for cleaning-system changes",[55,107,108,109,113,114,118],{},"Any change to a recovery-boiler cleaning system — including the addition of ",[62,110,112],{"href":111},"\u002Fglossary\u002Fsonic-horn","sonic horns"," or ",[62,115,117],{"href":116},"\u002Fglossary\u002Finfrasonic-cleaner","infrasonic cleaners"," — is reviewed against BLRBAC guidelines before implementation. Sylio's recovery-boiler installations include a BLRBAC-aligned engineering review as standard practice.",[68,120,122],{"id":121},"related-terms","Related terms",[81,124,125,130,135],{},[84,126,127],{},[62,128,129],{"href":64},"Recovery boiler",[84,131,132],{},[62,133,134],{"href":77},"Smelt",[84,136,137],{},[62,138,140],{"href":139},"\u002Fglossary\u002Fblack-liquor","Black liquor",{"title":142,"searchDepth":143,"depth":143,"links":144},"",2,[145,146,147],{"id":70,"depth":143,"text":71},{"id":104,"depth":143,"text":105},{"id":121,"depth":143,"text":122},"pulp-paper","BLRBAC (the Black Liquor Recovery Boiler Advisory Committee) is a non-profit industry advisory body that publishes Recommended Good Practices governing the safe operation of kraft recovery boilers. Member mills participate voluntarily but membership and adherence are effectively universal across the North American kraft industry, with international mills adopting BLRBAC standards as best practice.","md",{},true,"\u002Fglossary\u002Fblrbac",[155,78,156],"recovery-boiler","black-liquor",{"title":158,"description":159},"BLRBAC — recovery-boiler safety advisory committee","BLRBAC (Black Liquor Recovery Boiler Advisory Committee) publishes Recommended Good Practices governing safe operation of kraft recovery boilers. Mandatory reference for any cleaning-system change.",[161,164],{"title":162,"url":163},"BLRBAC — About","https:\u002F\u002Fblrbac.net\u002Fabout\u002F",{"title":165,"url":166},"AF&PA — Recovery Boiler Safety Audit Guidelines","https:\u002F\u002Fwww.afandpa.org\u002Fsites\u002Fdefault\u002Ffiles\u002F2021-05\u002Frecovery-boiler-safety-audit-guidelines.pdf","glossary\u002Fblrbac","-54-x_egrW2NlNahUvEMwaZvoZgrl8ey0RjG2Dm0dJ0",[170,364,456],{"id":171,"title":129,"aliases":172,"body":176,"category":344,"description":345,"extension":150,"meta":346,"navigation":152,"path":64,"relatedTerms":347,"seo":352,"sources":355,"stem":362,"term":129,"__hash__":363},"glossary\u002Fglossary\u002Frecovery-boiler.md",[173,174,175],"kraft recovery boiler","black-liquor recovery boiler","BLRB",{"type":52,"value":177,"toc":338},[178,195,199,205,240,249,253,283,287,293,295],[55,179,180,181,184,185,188,189,191,192,194],{},"A ",[58,182,183],{},"recovery boiler"," (also ",[186,187,173],"em",{},", ",[186,190,174],{},", or ",[186,193,175],{},") is a unique industrial boiler at the centre of every kraft pulp mill. It burns concentrated black liquor — the spent cooking-chemicals stream — to generate steam, electrical power and to recover the sodium and sulphur compounds that re-enter the pulping cycle as smelt. Recovery boilers are large, complex, expensive and irreplaceable to mill operation.",[68,196,198],{"id":197},"the-iconic-sonic-horn-application","The iconic sonic-horn application",[55,200,201,202,204],{},"Recovery boilers are the iconic application for ",[62,203,112],{"href":111},". Three features combine to make them so:",[81,206,207,223,234],{},[84,208,209,212,213,217,218,222],{},[58,210,211],{},"Sticky, alkali-rich ash"," — sodium-sulphate carry-over deposits aggressively on ",[62,214,216],{"href":215},"\u002Fglossary\u002Fsuperheater","superheater"," and ",[62,219,221],{"href":220},"\u002Fglossary\u002Fgenerating-bank","generating-bank"," tubes",[84,224,225,228,229,233],{},[58,226,227],{},"Long-run-time targets"," — mills target 12–18 months between ",[62,230,232],{"href":231},"\u002Fglossary\u002Fchill-and-blow","chill-and-blow"," wash cycles, and every extra week of run time is worth tens of thousands of dollars",[84,235,236,239],{},[58,237,238],{},"Deep cavities"," — the superheater bundles are tall and bafflingly inaccessible to short-throw cleaning",[55,241,242,243,245,246,248],{},"Both conventional ",[62,244,112],{"href":111}," at 60–125 Hz and ",[62,247,117],{"href":116}," below 30 Hz are deployed on recovery boilers. Major OEM aftermarket teams (ANDRITZ, Valmet, Babcock & Wilcox Vølund) all integrate acoustic cleaning into their service portfolios.",[68,250,252],{"id":251},"other-applications-inside-the-recovery-island","Other applications inside the recovery island",[81,254,255,261,267,277],{},[84,256,257,260],{},[58,258,259],{},"ESP hoppers"," — sodium-rich fly-ash bridging",[84,262,263,266],{},[58,264,265],{},"Economiser pluggage"," — salt-cake build-up on tube bundles",[84,268,269,272,273],{},[58,270,271],{},"Lime kiln preheater"," — see ",[62,274,276],{"href":275},"\u002Fglossary\u002Flime-kiln","lime kiln",[84,278,279,282],{},[58,280,281],{},"Smelt dissolving tank"," vent stack — sodium-fume build-up",[68,284,286],{"id":285},"safety","Safety",[55,288,289,290,292],{},"Recovery-boiler operations are governed by ",[62,291,47],{"href":153}," Recommended Good Practices. Any cleaning intervention — including acoustic — is reviewed against BLRBAC water-side-incident and emergency-shutdown protocols.",[68,294,122],{"id":121},[81,296,297,303,308,313,319,324,328,333],{},[84,298,299],{},[62,300,302],{"href":301},"\u002Fglossary\u002Fboiler","Boiler",[84,304,305],{},[62,306,307],{"href":220},"Generating bank",[84,309,310],{},[62,311,312],{"href":215},"Superheater",[84,314,315],{},[62,316,318],{"href":317},"\u002Fglossary\u002Feconomiser","Economiser",[84,320,321],{},[62,322,323],{"href":231},"Chill-and-blow",[84,325,326],{},[62,327,47],{"href":153},[84,329,330],{},[62,331,332],{"href":111},"Sonic horn",[84,334,335],{},[62,336,337],{"href":116},"Infrasonic cleaner",{"title":142,"searchDepth":143,"depth":143,"links":339},[340,341,342,343],{"id":197,"depth":143,"text":198},{"id":251,"depth":143,"text":252},{"id":285,"depth":143,"text":286},{"id":121,"depth":143,"text":122},"boiler","A recovery boiler (also kraft recovery boiler, black-liquor recovery boiler, or BLRB) is a unique industrial boiler at the centre of every kraft pulp mill. It burns concentrated black liquor — the spent cooking-chemicals stream — to generate steam, electrical power and to recover the sodium and sulphur compounds that re-enter the pulping cycle as smelt. Recovery boilers are large, complex, expensive and irreplaceable to mill operation.",{},[344,221,216,348,232,349,350,351],"economiser","blrbac","sonic-horn","infrasonic-cleaner",{"title":353,"description":354},"Recovery boiler — kraft pulp mill steam-and-chemicals plant","A recovery boiler burns kraft black liquor to generate steam, electrical power and recovered pulping chemicals. Iconic application for sonic horns on superheater cleaning.",[356,359],{"title":357,"url":358},"Wikipedia — Recovery boiler","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRecovery_boiler",{"title":360,"url":361},"BLRBAC — Recovery Boilers in Service","https:\u002F\u002Fblrbac.net\u002Frecovery-boilers-in-service\u002F","glossary\u002Frecovery-boiler","mXzBGZ7hSMEgl58wabmRAArKMR06mHldZvB1HJLRt0g",{"id":365,"title":134,"aliases":366,"body":369,"category":148,"description":443,"extension":150,"meta":444,"navigation":152,"path":77,"relatedTerms":445,"seo":448,"sources":451,"stem":453,"term":454,"__hash__":455},"glossary\u002Fglossary\u002Fsmelt.md",[367,368],"kraft smelt","recovery boiler smelt",{"type":52,"value":370,"toc":438},[371,384,388,407,409,415,417],[55,372,373,375,376,378,379,383],{},[58,374,134],{}," is the molten inorganic phase recovered from the bottom of a ",[62,377,173],{"href":64},". It consists primarily of sodium carbonate (Na₂CO₃) and sodium sulphide (Na₂S) at ~800 °C and is the chemical-recovery product of black-liquor combustion. Smelt is discharged from the boiler bottom through spouts into a ",[62,380,382],{"href":381},"\u002Fglossary\u002Fsmelt-dissolving-tank","smelt dissolving tank (SDT)"," where it is quenched into water to form green liquor.",[68,385,387],{"id":386},"smelt-carry-over","Smelt carry-over",[55,389,390,391,395,396,188,399,217,401,403,404,406],{},"A portion of the inorganic burden — sodium sulphate, sodium chloride, fume — does not settle as smelt but is entrained upward in the flue gas as ",[62,392,394],{"href":393},"\u002Fglossary\u002Fcarry-over","carry-over",". This carry-over is what fouls the ",[62,397,398],{"href":220},"generating bank",[62,400,216],{"href":215},[62,402,348],{"href":317},", and is the target of ",[62,405,350],{"href":111}," cleaning.",[68,408,286],{"id":285},[55,410,411,412,414],{},"Molten smelt contact with water is the leading documented cause of catastrophic recovery-boiler explosions. ",[62,413,47],{"href":153}," Recommended Good Practices govern smelt-handling procedures and any change to cleaning systems — including acoustic-horn additions — requires review against the smelt-water-explosion protocols.",[68,416,122],{"id":121},[81,418,419,423,427,432],{},[84,420,421],{},[62,422,129],{"href":64},[84,424,425],{},[62,426,140],{"href":139},[84,428,429],{},[62,430,431],{"href":381},"Smelt dissolving tank (SDT)",[84,433,434],{},[62,435,437],{"href":436},"\u002Fglossary\u002Frecausticising","Recausticising",{"title":142,"searchDepth":143,"depth":143,"links":439},[440,441,442],{"id":386,"depth":143,"text":387},{"id":285,"depth":143,"text":286},{"id":121,"depth":143,"text":122},"Smelt is the molten inorganic phase recovered from the bottom of a kraft recovery boiler. It consists primarily of sodium carbonate (Na₂CO₃) and sodium sulphide (Na₂S) at ~800 °C and is the chemical-recovery product of black-liquor combustion. Smelt is discharged from the boiler bottom through spouts into a smelt dissolving tank (SDT) where it is quenched into water to form green liquor.",{},[155,156,446,447],"smelt-dissolving-tank","recausticising",{"title":449,"description":450},"Smelt — molten inorganic recovered from kraft recovery boilers","Smelt is the molten sodium carbonate and sulphide mixture that accumulates in the bottom of a kraft recovery boiler. It is dissolved into green liquor and recausticised to pulping reagent.",[452],{"title":357,"url":358},"glossary\u002Fsmelt","Smelt (recovery boiler)","5L_O2eD74h-akmEsbjqyXkvnBQBYbTR5ZDvCt6_gCD4",{"id":457,"title":140,"aliases":458,"body":462,"category":148,"description":537,"extension":150,"meta":538,"navigation":152,"path":139,"relatedTerms":539,"seo":541,"sources":544,"stem":548,"term":140,"__hash__":549},"glossary\u002Fglossary\u002Fblack-liquor.md",[459,460,461],"kraft black liquor","weak black liquor","heavy black liquor",{"type":52,"value":463,"toc":533},[464,477,492,496,512,514],[55,465,466,468,469,473,474,476],{},[58,467,140],{}," is the concentrated spent cooking liquor from kraft pulping, containing dissolved lignin, hemicellulose, sodium carbonate, sodium sulphate and other inorganic compounds. After pulping, the weak black liquor (~15% solids) is concentrated in a ",[62,470,472],{"href":471},"\u002Fglossary\u002Fmulti-effect-evaporator","multi-effect evaporator"," train to heavy black liquor (~70–75% solids) and burned in the ",[62,475,183],{"href":64},". Combustion serves three purposes simultaneously:",[478,479,480,483,489],"ol",{},[84,481,482],{},"Generate steam and electrical power for the mill",[84,484,485,486,488],{},"Recover the sodium and sulphur chemicals as ",[62,487,78],{"href":77}," for re-use in pulping",[84,490,491],{},"Destroy the organic-loaded waste stream",[68,493,495],{"id":494},"why-it-matters-for-cleaning","Why it matters for cleaning",[55,497,498,499,501,502,188,504,217,506,508,509,511],{},"Burning concentrated black liquor produces uniquely sticky, alkali-rich ",[62,500,394],{"href":393}," that deposits on the recovery-boiler ",[62,503,398],{"href":220},[62,505,216],{"href":215},[62,507,348],{"href":317}," tubes. Black-liquor combustion is what makes recovery boilers the iconic application for ",[62,510,112],{"href":111}," — no other industrial-boiler fuel produces fouling so aggressive yet so responsive to acoustic cleaning.",[68,513,122],{"id":121},[81,515,516,520,524,529],{},[84,517,518],{},[62,519,129],{"href":64},[84,521,522],{},[62,523,134],{"href":77},[84,525,526],{},[62,527,528],{"href":471},"Multi-effect evaporator",[84,530,531],{},[62,532,437],{"href":436},{"title":142,"searchDepth":143,"depth":143,"links":534},[535,536],{"id":494,"depth":143,"text":495},{"id":121,"depth":143,"text":122},"Black liquor is the concentrated spent cooking liquor from kraft pulping, containing dissolved lignin, hemicellulose, sodium carbonate, sodium sulphate and other inorganic compounds. After pulping, the weak black liquor (~15% solids) is concentrated in a multi-effect evaporator train to heavy black liquor (~70–75% solids) and burned in the recovery boiler. Combustion serves three purposes simultaneously:",{},[155,78,540,447],"multi-effect-evaporator",{"title":542,"description":543},"Black liquor — concentrated kraft pulping spent liquor burned in recovery boilers","Black liquor is the concentrated spent cooking liquor from kraft pulping. It is burned in the recovery boiler to generate steam, power and to recover the pulping chemicals.",[545],{"title":546,"url":547},"Wikipedia — Black liquor","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBlack_liquor","glossary\u002Fblack-liquor","gg0HQ0VOAJ4Y-oJjXnj1VtHfSrn5coQQ7Kgldrp5uaY",1782613748426]