[{"data":1,"prerenderedAt":853},["ShallowReactive",2],{"site-footer-common":3,"glossary:chill-and-blow":45,"glossary-related:chill-and-blow":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":52,"category":149,"description":150,"extension":151,"meta":152,"navigation":153,"path":154,"relatedTerms":155,"seo":160,"sources":163,"stem":167,"term":47,"__hash__":168},"glossary\u002Fglossary\u002Fchill-and-blow.md","Chill-and-blow",[49,50,51],"chill and blow","C&B","thermal-shock cleaning",{"type":53,"value":54,"toc":141},"minimark",[55,78,83,86,90,102,106,113,117],[56,57,58,61,62,67,68,72,73,77],"p",{},[59,60,47],"strong",{}," is the periodic thermal-shock cleaning campaign performed on ",[63,64,66],"a",{"href":65},"\u002Fglossary\u002Frecovery-boiler","kraft recovery-boiler"," ",[63,69,71],{"href":70},"\u002Fglossary\u002Fsuperheater","superheaters"," when in-service cleaning is no longer sufficient. The boiler load is rapidly reduced; the superheater tubes cool quickly; the temperature differential between the cooled tubes and the consolidated deposit cracks the deposit; intense ",[63,74,76],{"href":75},"\u002Fglossary\u002Fsonic-sootblower","sootblowing"," then dislodges the cracked deposit.",[79,80,82],"h2",{"id":81},"why-it-matters-operationally","Why it matters operationally",[56,84,85],{},"A chill-and-blow campaign typically interrupts the boiler at full load for several hours and may require a brief mill production cutback. Mills target intervals of 12–18 months between chill-and-blow events; each additional week of run time defers a chill event and improves the mill's bottom line.",[79,87,89],{"id":88},"continuous-cleaning-to-extend-the-interval","Continuous cleaning to extend the interval",[56,91,92,96,97,101],{},[63,93,95],{"href":94},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," and ",[63,98,100],{"href":99},"\u002Fglossary\u002Finfrasonic-cleaner","infrasonic cleaners"," installed on the superheater extend the chill-and-blow interval substantially by preventing deposits from consolidating to the point where chill-and-blow is required. This is the headline operating-cost argument for acoustic-cleaning installation on recovery boilers.",[79,103,105],{"id":104},"distinguishing-from-water-wash","Distinguishing from water wash",[56,107,108,112],{},[63,109,111],{"href":110},"\u002Fglossary\u002Fwater-wash-recovery-boiler","Water wash"," is the more aggressive offline cleaning during a full boiler shutdown, where high-pressure water removes baked-on deposits that even chill-and-blow could not address.",[79,114,116],{"id":115},"related-terms","Related terms",[118,119,120,126,131,136],"ul",{},[121,122,123],"li",{},[63,124,125],{"href":65},"Recovery boiler",[121,127,128],{},[63,129,130],{"href":70},"Superheater",[121,132,133],{},[63,134,135],{"href":110},"Water wash (recovery boiler)",[121,137,138],{},[63,139,140],{"href":94},"Sonic horn",{"title":142,"searchDepth":143,"depth":143,"links":144},"",2,[145,146,147,148],{"id":81,"depth":143,"text":82},{"id":88,"depth":143,"text":89},{"id":104,"depth":143,"text":105},{"id":115,"depth":143,"text":116},"pulp-paper","Chill-and-blow is the periodic thermal-shock cleaning campaign performed on kraft recovery-boiler superheaters when in-service cleaning is no longer sufficient. The boiler load is rapidly reduced; the superheater tubes cool quickly; the temperature differential between the cooled tubes and the consolidated deposit cracks the deposit; intense sootblowing then dislodges the cracked deposit.","md",{},true,"\u002Fglossary\u002Fchill-and-blow",[156,157,158,159],"recovery-boiler","superheater","water-wash-recovery-boiler","sonic-horn",{"title":161,"description":162},"Chill-and-blow — thermal-shock cleaning campaign on recovery-boiler superheaters","Chill-and-blow is the thermal-shock cleaning campaign on a recovery-boiler superheater. The boiler is rapidly cooled to crack deposits; intense sootblowing then dislodges them.",[164],{"title":165,"url":166},"Valmet — Recovery Boiler Cleaning","https:\u002F\u002Fwww.valmet.com\u002Finsights\u002Farticles\u002Fup-and-running\u002Fnew-technology\u002FFPWashX\u002F","glossary\u002Fchill-and-blow","sjLYpF11nYsIy0KEZpWRg_7vmJAPSKd4yqkrlXBqAao",[170,359,512,620],{"id":171,"title":125,"aliases":172,"body":176,"category":340,"description":341,"extension":151,"meta":342,"navigation":153,"path":65,"relatedTerms":343,"seo":347,"sources":350,"stem":357,"term":125,"__hash__":358},"glossary\u002Fglossary\u002Frecovery-boiler.md",[173,174,175],"kraft recovery boiler","black-liquor recovery boiler","BLRB",{"type":53,"value":177,"toc":334},[178,195,199,206,237,246,250,280,284,292,294],[56,179,180,181,184,185,188,189,191,192,194],{},"A ",[59,182,183],{},"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.",[79,196,198],{"id":197},"the-iconic-sonic-horn-application","The iconic sonic-horn application",[56,200,201,202,205],{},"Recovery boilers are the iconic application for ",[63,203,204],{"href":94},"sonic horns",". Three features combine to make them so:",[118,207,208,221,231],{},[121,209,210,213,214,96,216,220],{},[59,211,212],{},"Sticky, alkali-rich ash"," — sodium-sulphate carry-over deposits aggressively on ",[63,215,157],{"href":70},[63,217,219],{"href":218},"\u002Fglossary\u002Fgenerating-bank","generating-bank"," tubes",[121,222,223,226,227,230],{},[59,224,225],{},"Long-run-time targets"," — mills target 12–18 months between ",[63,228,229],{"href":154},"chill-and-blow"," wash cycles, and every extra week of run time is worth tens of thousands of dollars",[121,232,233,236],{},[59,234,235],{},"Deep cavities"," — the superheater bundles are tall and bafflingly inaccessible to short-throw cleaning",[56,238,239,240,242,243,245],{},"Both conventional ",[63,241,204],{"href":94}," at 60–125 Hz and ",[63,244,100],{"href":99}," 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.",[79,247,249],{"id":248},"other-applications-inside-the-recovery-island","Other applications inside the recovery island",[118,251,252,258,264,274],{},[121,253,254,257],{},[59,255,256],{},"ESP hoppers"," — sodium-rich fly-ash bridging",[121,259,260,263],{},[59,261,262],{},"Economiser pluggage"," — salt-cake build-up on tube bundles",[121,265,266,269,270],{},[59,267,268],{},"Lime kiln preheater"," — see ",[63,271,273],{"href":272},"\u002Fglossary\u002Flime-kiln","lime kiln",[121,275,276,279],{},[59,277,278],{},"Smelt dissolving tank"," vent stack — sodium-fume build-up",[79,281,283],{"id":282},"safety","Safety",[56,285,286,287,291],{},"Recovery-boiler operations are governed by ",[63,288,290],{"href":289},"\u002Fglossary\u002Fblrbac","BLRBAC"," Recommended Good Practices. Any cleaning intervention — including acoustic — is reviewed against BLRBAC water-side-incident and emergency-shutdown protocols.",[79,293,116],{"id":115},[118,295,296,302,307,311,317,321,325,329],{},[121,297,298],{},[63,299,301],{"href":300},"\u002Fglossary\u002Fboiler","Boiler",[121,303,304],{},[63,305,306],{"href":218},"Generating bank",[121,308,309],{},[63,310,130],{"href":70},[121,312,313],{},[63,314,316],{"href":315},"\u002Fglossary\u002Feconomiser","Economiser",[121,318,319],{},[63,320,47],{"href":154},[121,322,323],{},[63,324,290],{"href":289},[121,326,327],{},[63,328,140],{"href":94},[121,330,331],{},[63,332,333],{"href":99},"Infrasonic cleaner",{"title":142,"searchDepth":143,"depth":143,"links":335},[336,337,338,339],{"id":197,"depth":143,"text":198},{"id":248,"depth":143,"text":249},{"id":282,"depth":143,"text":283},{"id":115,"depth":143,"text":116},"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.",{},[340,219,157,344,229,345,159,346],"economiser","blrbac","infrasonic-cleaner",{"title":348,"description":349},"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.",[351,354],{"title":352,"url":353},"Wikipedia — Recovery boiler","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRecovery_boiler",{"title":355,"url":356},"BLRBAC — Recovery Boilers in Service","https:\u002F\u002Fblrbac.net\u002Frecovery-boilers-in-service\u002F","glossary\u002Frecovery-boiler","mXzBGZ7hSMEgl58wabmRAArKMR06mHldZvB1HJLRt0g",{"id":360,"title":130,"aliases":361,"body":365,"category":340,"description":496,"extension":151,"meta":497,"navigation":153,"path":70,"relatedTerms":498,"seo":503,"sources":506,"stem":510,"term":130,"__hash__":511},"glossary\u002Fglossary\u002Fsuperheater.md",[71,362,363,364],"primary superheater","secondary superheater","finishing superheater",{"type":53,"value":366,"toc":491},[367,377,381,420,424,434,456,459,461],[56,368,180,369,371,372,376],{},[59,370,157],{}," is a tube bank in a boiler's ",[63,373,375],{"href":374},"\u002Fglossary\u002Fconvective-pass-backpass","convective pass"," that raises the steam temperature beyond its saturation point using residual heat from the flue gas. Most utility boilers have at least two superheater stages: a primary superheater (cooler gas) and a secondary or finishing superheater (closest to the furnace, hottest gas).",[79,378,380],{"id":379},"fouling","Fouling",[118,382,383,397,403],{},[121,384,385,391,392,396],{},[59,386,387],{},[63,388,390],{"href":389},"\u002Fglossary\u002Fslagging","Slagging"," on the finishing superheater — semi-molten ash from the ",[63,393,395],{"href":394},"\u002Fglossary\u002Ffurnace","furnace"," deposits on the hottest tubes",[121,398,399,402],{},[59,400,401],{},"Bonded ash"," on the primary superheater — drier deposits that sinter under sustained temperature",[121,404,405,408,409,188,413,96,416,419],{},[59,406,407],{},"Sodium \u002F potassium-rich deposits"," on ",[63,410,412],{"href":411},"\u002Fglossary\u002Fwaste-to-energy","biomass",[63,414,415],{"href":411},"WtE",[63,417,418],{"href":65},"recovery boilers"," — sticky, low-melting, aggressive",[79,421,423],{"id":422},"cleaning","Cleaning",[56,425,426,427,96,431,433],{},"Steam ",[63,428,430],{"href":429},"\u002Fglossary\u002Fsteam-sootblower","sootblowers",[63,432,204],{"href":94}," work together:",[118,435,436,439,447],{},[121,437,438],{},"Sootblowers attack hard slag on the finishing superheater",[121,440,441,442,446],{},"Sonic horns (",[63,443,445],{"href":444},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","60–125 Hz",") keep dry ash from consolidating on the primary superheater and convective superheater",[121,448,449,452,453,455],{},[63,450,451],{"href":99},"Infrasonic cleaners"," below 30 Hz are used on deep ",[63,454,156],{"href":65}," superheater cavities",[56,457,458],{},"The combination extends the interval between major water-washes and reduces steam-attemperation requirements that mask deteriorating heat transfer.",[79,460,116],{"id":115},[118,462,463,467,472,478,482,486],{},[121,464,465],{},[63,466,301],{"href":300},[121,468,469],{},[63,470,471],{"href":374},"Convective pass \u002F backpass",[121,473,474],{},[63,475,477],{"href":476},"\u002Fglossary\u002Freheater","Reheater",[121,479,480],{},[63,481,390],{"href":389},[121,483,484],{},[63,485,140],{"href":94},[121,487,488],{},[63,489,490],{"href":75},"Sonic sootblower",{"title":142,"searchDepth":143,"depth":143,"links":492},[493,494,495],{"id":379,"depth":143,"text":380},{"id":422,"depth":143,"text":423},{"id":115,"depth":143,"text":116},"A superheater is a tube bank in a boiler's convective pass that raises the steam temperature beyond its saturation point using residual heat from the flue gas. Most utility boilers have at least two superheater stages: a primary superheater (cooler gas) and a secondary or finishing superheater (closest to the furnace, hottest gas).",{},[340,499,500,501,159,502],"convective-pass-backpass","reheater","slagging","sonic-sootblower",{"title":504,"description":505},"Superheater — boiler tube bank that raises steam temperature beyond saturation","A superheater is a tube bank that raises steam temperature beyond the saturation point using flue-gas heat. Sticky alkali ash and slag deposits are the dominant fouling concerns.",[507],{"title":508,"url":509},"Wikipedia — Superheater","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSuperheater","glossary\u002Fsuperheater","hYVXyyVmlWCU3AXfAl0l3YAhHpWty_akkDsBJGC_NDs",{"id":513,"title":135,"aliases":514,"body":518,"category":149,"description":610,"extension":151,"meta":611,"navigation":153,"path":110,"relatedTerms":612,"seo":613,"sources":616,"stem":618,"term":135,"__hash__":619},"glossary\u002Fglossary\u002Fwater-wash-recovery-boiler.md",[515,516,517],"recovery boiler water wash","water washing","hydroblasting (recovery)",{"type":53,"value":519,"toc":604},[520,541,545,548,567,571,574,578,584,586],[56,521,180,522,525,526,528,529,188,531,96,533,535,536,96,538,540],{},[59,523,524],{},"water wash"," on a ",[63,527,183],{"href":65}," is the offline cleaning campaign performed during a full boiler shutdown, using high-pressure water lances to remove consolidated deposits from ",[63,530,157],{"href":70},[63,532,219],{"href":218},[63,534,344],{"href":315}," tubes that in-service ",[63,537,204],{"href":94},[63,539,229],{"href":154}," could not remove.",[79,542,544],{"id":543},"frequency","Frequency",[56,546,547],{},"Mills target intervals of 18–36 months between water-wash campaigns, depending on:",[118,549,550,553,556,564],{},[121,551,552],{},"Boiler design and age",[121,554,555],{},"Black-liquor solids loading",[121,557,558,559,563],{},"Effectiveness of continuous cleaning (sonic horns, ",[63,560,562],{"href":561},"\u002Fglossary\u002Fik-long-retract-sootblower","IK sootblowers",")",[121,565,566],{},"BLRBAC inspection programme",[79,568,570],{"id":569},"cost-of-a-water-wash","Cost of a water wash",[56,572,573],{},"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.",[79,575,577],{"id":576},"how-sonic-horns-extend-the-water-wash-interval","How sonic horns extend the water-wash interval",[56,579,580,581,583],{},"Continuous ",[63,582,159],{"href":94}," 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.",[79,585,116],{"id":115},[118,587,588,592,596,600],{},[121,589,590],{},[63,591,125],{"href":65},[121,593,594],{},[63,595,47],{"href":154},[121,597,598],{},[63,599,130],{"href":70},[121,601,602],{},[63,603,140],{"href":94},{"title":142,"searchDepth":143,"depth":143,"links":605},[606,607,608,609],{"id":543,"depth":143,"text":544},{"id":569,"depth":143,"text":570},{"id":576,"depth":143,"text":577},{"id":115,"depth":143,"text":116},"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.",{},[156,229,157,159],{"title":614,"description":615},"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.",[617],{"title":165,"url":166},"glossary\u002Fwater-wash-recovery-boiler","rX-p3SRsB-4pGFR0cei_CBc6DRSim1vUWzK-yxwuAE8",{"id":621,"title":140,"aliases":622,"body":625,"category":829,"description":830,"extension":151,"meta":831,"navigation":153,"path":94,"relatedTerms":832,"seo":838,"sources":841,"stem":851,"term":140,"__hash__":852},"glossary\u002Fglossary\u002Fsonic-horn.md",[204,623,624],"sonic cleaning horn","industrial sonic horn",{"type":53,"value":626,"toc":822},[627,658,662,670,674,742,746,781,785,792,794],[56,628,180,629,632,633,637,638,188,642,188,646,188,650,96,653,657],{},[59,630,631],{},"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 ",[63,634,636],{"href":635},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[63,639,641],{"href":640},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",[63,643,645],{"href":644},"\u002Fglossary\u002Ffabric-filter","baghouses",[63,647,649],{"href":648},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[63,651,652],{"href":70},"boiler heat-transfer surfaces",[63,654,656],{"href":655},"\u002Fglossary\u002Fhopper","hoppers and silos",".",[79,659,661],{"id":660},"how-a-sonic-horn-works","How a sonic horn works",[56,663,664,665,669],{},"Compressed plant air admitted through a ",[63,666,668],{"href":667},"\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.",[79,671,673],{"id":672},"key-parameters","Key parameters",[675,676,677,690],"table",{},[678,679,680],"thead",{},[681,682,683,687],"tr",{},[684,685,686],"th",{},"Parameter",[684,688,689],{},"Typical range",[691,692,693,702,710,718,726,734],"tbody",{},[681,694,695,699],{},[696,697,698],"td",{},"Fundamental frequency",[696,700,701],{},"60–400 Hz",[681,703,704,707],{},[696,705,706],{},"Sound pressure level",[696,708,709],{},"140–180 dB",[681,711,712,715],{},[696,713,714],{},"Compressed-air consumption",[696,716,717],{},"8–14 Nm³\u002Fmin at 4–7 bar",[681,719,720,723],{},[696,721,722],{},"Operating temperature (with appropriate materials)",[696,724,725],{},"−40 °C to +500 °C",[681,727,728,731],{},[696,729,730],{},"Firing cycle",[696,732,733],{},"5–15 s burst, repeated every 3–15 minutes",[681,735,736,739],{},[696,737,738],{},"Mass",[696,740,741],{},"15–60 kg depending on horn size",[79,743,745],{"id":744},"frequency-selection","Frequency selection",[56,747,748,749,188,753,756,757,188,761,765,766,188,769,773,774,96,777,657],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[63,750,752],{"href":751},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[63,754,755],{"href":65},"recovery-boiler superheaters",", large ",[63,758,760],{"href":759},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[63,762,764],{"href":763},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[63,767,768],{"href":644},"fabric-filter compartments",[63,770,772],{"href":771},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[63,775,776],{"href":444},"low-frequency acoustic cleaner",[63,778,780],{"href":779},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[79,782,784],{"id":783},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[56,786,787,788,791],{},"Sonic horns are increasingly specified alongside or in place of ",[63,789,790],{"href":429},"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.",[79,793,116],{"id":115},[118,795,796,801,805,811,817],{},[121,797,798],{},[63,799,800],{"href":635},"Acoustic cleaner",[121,802,803],{},[63,804,490],{"href":75},[121,806,807],{},[63,808,810],{"href":809},"\u002Fglossary\u002Fbell-horn","Bell horn",[121,812,813],{},[63,814,816],{"href":815},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[121,818,819],{},[63,820,821],{"href":444},"Low-frequency acoustic cleaner",{"title":142,"searchDepth":143,"depth":143,"links":823},[824,825,826,827,828],{"id":660,"depth":143,"text":661},{"id":672,"depth":143,"text":673},{"id":744,"depth":143,"text":745},{"id":783,"depth":143,"text":784},{"id":115,"depth":143,"text":116},"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.",{},[833,834,502,835,836,837],"acoustic-cleaner","acoustic-cleaning-system","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":839,"description":840},"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.",[842,845,848],{"title":843,"url":844},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":846,"url":847},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":849,"url":850},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",1782613748824]