[{"data":1,"prerenderedAt":914},["ShallowReactive",2],{"site-footer-common":3,"glossary:shock-pulse-generator":45,"glossary-related:shock-pulse-generator":192},{"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":172,"description":173,"extension":174,"meta":175,"navigation":176,"path":177,"relatedTerms":178,"seo":182,"sources":185,"stem":189,"term":190,"__hash__":191},"glossary\u002Fglossary\u002Fshock-pulse-generator.md","Shock-pulse generator (SPG)",[49,50,51],"SPG","Valmet SPG","shock pulse generator",{"type":53,"value":54,"toc":165},"minimark",[55,88,93,106,119,123,139,143],[56,57,58,59,63,64,66,67,72,73,77,78,82,83,87],"p",{},"A ",[60,61,62],"strong",{},"shock-pulse generator (SPG)"," — most commonly the ",[60,65,50],{}," — generates high-energy gas-detonation shock waves inside a ",[68,69,71],"a",{"href":70},"\u002Fglossary\u002Frecovery-boiler","recovery boiler"," for periodic deep cleaning of ",[68,74,76],{"href":75},"\u002Fglossary\u002Fsuperheater","superheater"," and ",[68,79,81],{"href":80},"\u002Fglossary\u002Fgenerating-bank","generating-bank"," deposits. The technology shares its physical principle with ",[68,84,86],{"href":85},"\u002Fglossary\u002Fdetonation-cleaning","detonation cleaning"," but is specifically engineered for kraft-recovery-boiler service.",[89,90,92],"h2",{"id":91},"where-spg-fits","Where SPG fits",[94,95,96,100,103],"ul",{},[97,98,99],"li",{},"Recovery-boiler superheater (high-value, deep cavities)",[97,101,102],{},"Recovery-boiler generating bank",[97,104,105],{},"Some industrial-boiler convective passes",[56,107,108,109,113,114,118],{},"The SPG is positioned as a complement to existing ",[68,110,112],{"href":111},"\u002Fglossary\u002Fik-long-retract-sootblower","IK long-retract sootblowers",", extending intervals between ",[68,115,117],{"href":116},"\u002Fglossary\u002Fchill-and-blow","chill-and-blow"," campaigns by handling consolidated deposits that sootblowers cannot dislodge.",[89,120,122],{"id":121},"position-relative-to-sonic-horns","Position relative to sonic horns",[56,124,125,129,130,134,135,138],{},[68,126,128],{"href":127},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," work ",[131,132,133],"em",{},"before"," deposits consolidate — they keep ash friable so it can be dislodged by mild cleaning. SPG works ",[131,136,137],{},"after"," consolidation — it breaks hardened deposits that sonic horns could not have prevented. The two technologies operate at opposite ends of the same fouling cycle and are complementary rather than competitive.",[89,140,142],{"id":141},"related-terms","Related terms",[94,144,145,150,155,160],{},[97,146,147],{},[68,148,149],{"href":85},"Detonation cleaning",[97,151,152],{},[68,153,154],{"href":70},"Recovery boiler",[97,156,157],{},[68,158,159],{"href":75},"Superheater",[97,161,162],{},[68,163,164],{"href":127},"Sonic horn",{"title":166,"searchDepth":167,"depth":167,"links":168},"",2,[169,170,171],{"id":91,"depth":167,"text":92},{"id":121,"depth":167,"text":122},{"id":141,"depth":167,"text":142},"alternative-cleaning","A shock-pulse generator (SPG) — most commonly the Valmet SPG — generates high-energy gas-detonation shock waves inside a recovery boiler for periodic deep cleaning of superheater and generating-bank deposits. The technology shares its physical principle with detonation cleaning but is specifically engineered for kraft-recovery-boiler service.","md",{},true,"\u002Fglossary\u002Fshock-pulse-generator",[179,180,76,181],"detonation-cleaning","recovery-boiler","sonic-horn",{"title":183,"description":184},"Shock-pulse generator (SPG) — Valmet's gas-detonation cleaning system","The Valmet SPG generates high-energy gas-detonation shock waves inside the recovery boiler for periodic deep cleaning. Complementary to continuous sonic-horn cleaning.",[186],{"title":187,"url":188},"Valmet — Shock Pulse Generator","https:\u002F\u002Fwww.valmet.com\u002Fpulp\u002Fchemical-recovery\u002Frecovery-boilers\u002Fshock-pulse-generator\u002F","glossary\u002Fshock-pulse-generator","Shock-pulse generator","2iQaMLgxQEmWgLzgW3GFFVJmisTH9KMkVgTA_odCb4s",[193,350,535,687],{"id":194,"title":149,"aliases":195,"body":199,"category":172,"description":336,"extension":174,"meta":337,"navigation":176,"path":85,"relatedTerms":338,"seo":341,"sources":344,"stem":348,"term":149,"__hash__":349},"glossary\u002Fglossary\u002Fdetonation-cleaning.md",[196,197,198],"shock wave cleaning","pulse detonation cleaning","Bang & Clean",{"type":53,"value":200,"toc":332},[201,218,222,311,314,316],[56,202,203,205,206,208,209,213,214,217],{},[60,204,149],{}," 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 ",[60,207,198],{}," system, marketed primarily for ",[68,210,212],{"href":211},"\u002Fglossary\u002Fwaste-to-energy","WtE",", ",[68,215,216],{"href":211},"biomass",", and lignite-fired boilers with persistent fouling.",[89,219,221],{"id":220},"trade-offs-vs-sonic-horns","Trade-offs vs sonic horns",[223,224,225,241],"table",{},[226,227,228],"thead",{},[229,230,231,235,237],"tr",{},[232,233,234],"th",{},"Attribute",[232,236,149],{},[232,238,239],{},[68,240,164],{"href":127},[242,243,244,256,267,278,289,300],"tbody",{},[229,245,246,250,253],{},[247,248,249],"td",{},"Energy per shot",[247,251,252],{},"Very high",[247,254,255],{},"Low",[229,257,258,261,264],{},[247,259,260],{},"Frequency",[247,262,263],{},"Episodic (per shift)",[247,265,266],{},"Continuous (every few minutes)",[229,268,269,272,275],{},[247,270,271],{},"Damage potential",[247,273,274],{},"Documented on weld points if mis-targeted",[247,276,277],{},"None",[229,279,280,283,286],{},[247,281,282],{},"Capital cost per unit",[247,284,285],{},"Higher",[247,287,288],{},"Lower",[229,290,291,294,297],{},[247,292,293],{},"Best application",[247,295,296],{},"Hard consolidated deposits, periodic remediation",[247,298,299],{},"Continuous prevention",[229,301,302,305,308],{},[247,303,304],{},"Operator presence required",[247,306,307],{},"Yes for each shot",[247,309,310],{},"No, fully automatic",[56,312,313],{},"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.",[89,315,142],{"id":141},[94,317,318,324,328],{},[97,319,320],{},[68,321,323],{"href":322},"\u002Fglossary\u002Fexplosive-deslagging","Explosive deslagging",[97,325,326],{},[68,327,190],{"href":177},[97,329,330],{},[68,331,164],{"href":127},{"title":166,"searchDepth":167,"depth":167,"links":333},[334,335],{"id":220,"depth":167,"text":221},{"id":141,"depth":167,"text":142},"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.",{},[339,340,181],"explosive-deslagging","shock-pulse-generator",{"title":342,"description":343},"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.",[345],{"title":346,"url":347},"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":351,"title":154,"aliases":352,"body":356,"category":516,"description":517,"extension":174,"meta":518,"navigation":176,"path":70,"relatedTerms":519,"seo":523,"sources":526,"stem":533,"term":154,"__hash__":534},"glossary\u002Fglossary\u002Frecovery-boiler.md",[353,354,355],"kraft recovery boiler","black-liquor recovery boiler","BLRB",{"type":53,"value":357,"toc":510},[358,371,375,382,410,421,425,455,459,467,469],[56,359,58,360,362,363,213,365,367,368,370],{},[60,361,71],{}," (also ",[131,364,353],{},[131,366,354],{},", or ",[131,369,355],{},") 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.",[89,372,374],{"id":373},"the-iconic-sonic-horn-application","The iconic sonic-horn application",[56,376,377,378,381],{},"Recovery boilers are the iconic application for ",[68,379,380],{"href":127},"sonic horns",". Three features combine to make them so:",[94,383,384,395,404],{},[97,385,386,389,390,77,392,394],{},[60,387,388],{},"Sticky, alkali-rich ash"," — sodium-sulphate carry-over deposits aggressively on ",[68,391,76],{"href":75},[68,393,81],{"href":80}," tubes",[97,396,397,400,401,403],{},[60,398,399],{},"Long-run-time targets"," — mills target 12–18 months between ",[68,402,117],{"href":116}," wash cycles, and every extra week of run time is worth tens of thousands of dollars",[97,405,406,409],{},[60,407,408],{},"Deep cavities"," — the superheater bundles are tall and bafflingly inaccessible to short-throw cleaning",[56,411,412,413,415,416,420],{},"Both conventional ",[68,414,380],{"href":127}," at 60–125 Hz and ",[68,417,419],{"href":418},"\u002Fglossary\u002Finfrasonic-cleaner","infrasonic cleaners"," 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.",[89,422,424],{"id":423},"other-applications-inside-the-recovery-island","Other applications inside the recovery island",[94,426,427,433,439,449],{},[97,428,429,432],{},[60,430,431],{},"ESP hoppers"," — sodium-rich fly-ash bridging",[97,434,435,438],{},[60,436,437],{},"Economiser pluggage"," — salt-cake build-up on tube bundles",[97,440,441,444,445],{},[60,442,443],{},"Lime kiln preheater"," — see ",[68,446,448],{"href":447},"\u002Fglossary\u002Flime-kiln","lime kiln",[97,450,451,454],{},[60,452,453],{},"Smelt dissolving tank"," vent stack — sodium-fume build-up",[89,456,458],{"id":457},"safety","Safety",[56,460,461,462,466],{},"Recovery-boiler operations are governed by ",[68,463,465],{"href":464},"\u002Fglossary\u002Fblrbac","BLRBAC"," Recommended Good Practices. Any cleaning intervention — including acoustic — is reviewed against BLRBAC water-side-incident and emergency-shutdown protocols.",[89,468,142],{"id":141},[94,470,471,477,482,486,492,497,501,505],{},[97,472,473],{},[68,474,476],{"href":475},"\u002Fglossary\u002Fboiler","Boiler",[97,478,479],{},[68,480,481],{"href":80},"Generating bank",[97,483,484],{},[68,485,159],{"href":75},[97,487,488],{},[68,489,491],{"href":490},"\u002Fglossary\u002Feconomiser","Economiser",[97,493,494],{},[68,495,496],{"href":116},"Chill-and-blow",[97,498,499],{},[68,500,465],{"href":464},[97,502,503],{},[68,504,164],{"href":127},[97,506,507],{},[68,508,509],{"href":418},"Infrasonic cleaner",{"title":166,"searchDepth":167,"depth":167,"links":511},[512,513,514,515],{"id":373,"depth":167,"text":374},{"id":423,"depth":167,"text":424},{"id":457,"depth":167,"text":458},{"id":141,"depth":167,"text":142},"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.",{},[516,81,76,520,117,521,181,522],"economiser","blrbac","infrasonic-cleaner",{"title":524,"description":525},"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.",[527,530],{"title":528,"url":529},"Wikipedia — Recovery boiler","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRecovery_boiler",{"title":531,"url":532},"BLRBAC — Recovery Boilers in Service","https:\u002F\u002Fblrbac.net\u002Frecovery-boilers-in-service\u002F","glossary\u002Frecovery-boiler","mXzBGZ7hSMEgl58wabmRAArKMR06mHldZvB1HJLRt0g",{"id":536,"title":159,"aliases":537,"body":542,"category":516,"description":671,"extension":174,"meta":672,"navigation":176,"path":75,"relatedTerms":673,"seo":678,"sources":681,"stem":685,"term":159,"__hash__":686},"glossary\u002Fglossary\u002Fsuperheater.md",[538,539,540,541],"superheaters","primary superheater","secondary superheater","finishing superheater",{"type":53,"value":543,"toc":666},[544,554,558,594,598,608,630,633,635],[56,545,58,546,548,549,553],{},[60,547,76],{}," is a tube bank in a boiler's ",[68,550,552],{"href":551},"\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).",[89,555,557],{"id":556},"fouling","Fouling",[94,559,560,574,580],{},[97,561,562,568,569,573],{},[60,563,564],{},[68,565,567],{"href":566},"\u002Fglossary\u002Fslagging","Slagging"," on the finishing superheater — semi-molten ash from the ",[68,570,572],{"href":571},"\u002Fglossary\u002Ffurnace","furnace"," deposits on the hottest tubes",[97,575,576,579],{},[60,577,578],{},"Bonded ash"," on the primary superheater — drier deposits that sinter under sustained temperature",[97,581,582,585,586,213,588,77,590,593],{},[60,583,584],{},"Sodium \u002F potassium-rich deposits"," on ",[68,587,216],{"href":211},[68,589,212],{"href":211},[68,591,592],{"href":70},"recovery boilers"," — sticky, low-melting, aggressive",[89,595,597],{"id":596},"cleaning","Cleaning",[56,599,600,601,77,605,607],{},"Steam ",[68,602,604],{"href":603},"\u002Fglossary\u002Fsteam-sootblower","sootblowers",[68,606,380],{"href":127}," work together:",[94,609,610,613,621],{},[97,611,612],{},"Sootblowers attack hard slag on the finishing superheater",[97,614,615,616,620],{},"Sonic horns (",[68,617,619],{"href":618},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","60–125 Hz",") keep dry ash from consolidating on the primary superheater and convective superheater",[97,622,623,626,627,629],{},[68,624,625],{"href":418},"Infrasonic cleaners"," below 30 Hz are used on deep ",[68,628,180],{"href":70}," superheater cavities",[56,631,632],{},"The combination extends the interval between major water-washes and reduces steam-attemperation requirements that mask deteriorating heat transfer.",[89,634,142],{"id":141},[94,636,637,641,646,652,656,660],{},[97,638,639],{},[68,640,476],{"href":475},[97,642,643],{},[68,644,645],{"href":551},"Convective pass \u002F backpass",[97,647,648],{},[68,649,651],{"href":650},"\u002Fglossary\u002Freheater","Reheater",[97,653,654],{},[68,655,567],{"href":566},[97,657,658],{},[68,659,164],{"href":127},[97,661,662],{},[68,663,665],{"href":664},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",{"title":166,"searchDepth":167,"depth":167,"links":667},[668,669,670],{"id":556,"depth":167,"text":557},{"id":596,"depth":167,"text":597},{"id":141,"depth":167,"text":142},"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).",{},[516,674,675,676,181,677],"convective-pass-backpass","reheater","slagging","sonic-sootblower",{"title":679,"description":680},"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.",[682],{"title":683,"url":684},"Wikipedia — Superheater","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSuperheater","glossary\u002Fsuperheater","hYVXyyVmlWCU3AXfAl0l3YAhHpWty_akkDsBJGC_NDs",{"id":688,"title":164,"aliases":689,"body":692,"category":890,"description":891,"extension":174,"meta":892,"navigation":176,"path":127,"relatedTerms":893,"seo":899,"sources":902,"stem":912,"term":164,"__hash__":913},"glossary\u002Fglossary\u002Fsonic-horn.md",[380,690,691],"sonic cleaning horn","industrial sonic horn",{"type":53,"value":693,"toc":883},[694,725,729,737,741,803,807,842,846,853,855],[56,695,58,696,699,700,704,705,213,709,213,713,213,717,77,720,724],{},[60,697,698],{},"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 ",[68,701,703],{"href":702},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[68,706,708],{"href":707},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",[68,710,712],{"href":711},"\u002Fglossary\u002Ffabric-filter","baghouses",[68,714,716],{"href":715},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[68,718,719],{"href":75},"boiler heat-transfer surfaces",[68,721,723],{"href":722},"\u002Fglossary\u002Fhopper","hoppers and silos",".",[89,726,728],{"id":727},"how-a-sonic-horn-works","How a sonic horn works",[56,730,731,732,736],{},"Compressed plant air admitted through a ",[68,733,735],{"href":734},"\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.",[89,738,740],{"id":739},"key-parameters","Key parameters",[223,742,743,753],{},[226,744,745],{},[229,746,747,750],{},[232,748,749],{},"Parameter",[232,751,752],{},"Typical range",[242,754,755,763,771,779,787,795],{},[229,756,757,760],{},[247,758,759],{},"Fundamental frequency",[247,761,762],{},"60–400 Hz",[229,764,765,768],{},[247,766,767],{},"Sound pressure level",[247,769,770],{},"140–180 dB",[229,772,773,776],{},[247,774,775],{},"Compressed-air consumption",[247,777,778],{},"8–14 Nm³\u002Fmin at 4–7 bar",[229,780,781,784],{},[247,782,783],{},"Operating temperature (with appropriate materials)",[247,785,786],{},"−40 °C to +500 °C",[229,788,789,792],{},[247,790,791],{},"Firing cycle",[247,793,794],{},"5–15 s burst, repeated every 3–15 minutes",[229,796,797,800],{},[247,798,799],{},"Mass",[247,801,802],{},"15–60 kg depending on horn size",[89,804,806],{"id":805},"frequency-selection","Frequency selection",[56,808,809,810,213,814,817,818,213,822,826,827,213,830,834,835,77,838,724],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[68,811,813],{"href":812},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[68,815,816],{"href":70},"recovery-boiler superheaters",", large ",[68,819,821],{"href":820},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[68,823,825],{"href":824},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[68,828,829],{"href":711},"fabric-filter compartments",[68,831,833],{"href":832},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[68,836,837],{"href":618},"low-frequency acoustic cleaner",[68,839,841],{"href":840},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[89,843,845],{"id":844},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[56,847,848,849,852],{},"Sonic horns are increasingly specified alongside or in place of ",[68,850,851],{"href":603},"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.",[89,854,142],{"id":141},[94,856,857,862,866,872,878],{},[97,858,859],{},[68,860,861],{"href":702},"Acoustic cleaner",[97,863,864],{},[68,865,665],{"href":664},[97,867,868],{},[68,869,871],{"href":870},"\u002Fglossary\u002Fbell-horn","Bell horn",[97,873,874],{},[68,875,877],{"href":876},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[97,879,880],{},[68,881,882],{"href":618},"Low-frequency acoustic cleaner",{"title":166,"searchDepth":167,"depth":167,"links":884},[885,886,887,888,889],{"id":727,"depth":167,"text":728},{"id":739,"depth":167,"text":740},{"id":805,"depth":167,"text":806},{"id":844,"depth":167,"text":845},{"id":141,"depth":167,"text":142},"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.",{},[894,895,677,896,897,898],"acoustic-cleaner","acoustic-cleaning-system","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":900,"description":901},"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.",[903,906,909],{"title":904,"url":905},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":907,"url":908},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":910,"url":911},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",1782613719165]