[{"data":1,"prerenderedAt":968},["ShallowReactive",2],{"site-footer-common":3,"glossary:ptfe-membrane-filter-bag":45,"glossary-related:ptfe-membrane-filter-bag":185},{"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":166,"description":167,"extension":168,"meta":169,"navigation":170,"path":171,"relatedTerms":172,"seo":176,"sources":179,"stem":183,"term":47,"__hash__":184},"glossary\u002Fglossary\u002Fptfe-membrane-filter-bag.md","PTFE-membrane filter bag",[49,50,51],"PTFE membrane bag","ePTFE filter bag","Teflon membrane bag",{"type":53,"value":54,"toc":158},"minimark",[55,72,77,91,95,118,122,130,134],[56,57,58,59,62,63,67,68,71],"p",{},"A ",[60,61,47],"strong",{}," carries a microporous expanded-polytetrafluoroethylene (ePTFE) membrane laminated to the outside surface of a base felt (usually polyester, P84 or PPS). Particulate is trapped on the membrane surface rather than within the depth of the felt — ",[64,65,66],"em",{},"surface filtration",", also called ",[64,69,70],{},"cake filtration on a membrane",". Outlet particulate of below 1 mg\u002FNm³ is routinely achievable.",[73,74,76],"h2",{"id":75},"why-surface-filtration-changes-the-operating-regime","Why surface filtration changes the operating regime",[56,78,79,80,85,86,90],{},"In a conventional depth-filtration bag, particulate gradually loads into the felt itself, raising ",[81,82,84],"a",{"href":83},"\u002Fglossary\u002Fdifferential-pressure-baghouse","differential pressure"," over weeks and eventually causing ",[81,87,89],{"href":88},"\u002Fglossary\u002Fbag-blinding","bag blinding",". A PTFE membrane prevents particulate ingress; cleaning is more complete because the entire cake sits on a non-stick surface; ΔP stabilises quickly after each pulse-jet cycle.",[73,92,94],{"id":93},"where-ptfe-membrane-bags-are-specified","Where PTFE-membrane bags are specified",[96,97,98,106,109,112,115],"ul",{},[99,100,101,105],"li",{},[81,102,104],{"href":103},"\u002Fglossary\u002Fwaste-to-energy","Waste-to-energy"," baghouses with strict particulate limits",[99,107,108],{},"Hazardous-waste incineration",[99,110,111],{},"Pharmaceutical and food-grade applications",[99,113,114],{},"Cement bypass baghouses",[99,116,117],{},"Replacements for conventional bags facing tightened emission limits",[73,119,121],{"id":120},"cleaning-compatibility","Cleaning compatibility",[56,123,124,125,129],{},"PTFE-membrane bags tolerate ",[81,126,128],{"href":127},"\u002Fglossary\u002Fsonic-horn","sonic-horn"," cleaning without surface damage, provided horns are mounted to project sound across the bag rows rather than directly at any single bag at close range.",[73,131,133],{"id":132},"related-terms","Related terms",[96,135,136,142,148,153],{},[99,137,138],{},[81,139,141],{"href":140},"\u002Fglossary\u002Ffilter-bag","Filter bag",[99,143,144],{},[81,145,147],{"href":146},"\u002Fglossary\u002Fp84-nomex-ryton-filter-media","P84 \u002F Nomex \u002F Ryton filter media",[99,149,150],{},[81,151,152],{"href":88},"Bag blinding",[99,154,155],{},[81,156,157],{"href":127},"Sonic horn",{"title":159,"searchDepth":160,"depth":160,"links":161},"",2,[162,163,164,165],{"id":75,"depth":160,"text":76},{"id":93,"depth":160,"text":94},{"id":120,"depth":160,"text":121},{"id":132,"depth":160,"text":133},"baghouse","A PTFE-membrane filter bag carries a microporous expanded-polytetrafluoroethylene (ePTFE) membrane laminated to the outside surface of a base felt (usually polyester, P84 or PPS). Particulate is trapped on the membrane surface rather than within the depth of the felt — surface filtration, also called cake filtration on a membrane. Outlet particulate of below 1 mg\u002FNm³ is routinely achievable.","md",{},true,"\u002Fglossary\u002Fptfe-membrane-filter-bag",[173,174,175,128],"filter-bag","p84-nomex-ryton-filter-media","bag-blinding",{"title":177,"description":178},"PTFE-membrane filter bag — surface filtration for sub-mg particulate","A PTFE-membrane filter bag has a microporous Teflon membrane laminated to the surface of a base felt. Particulate is trapped on the membrane, not within the depth, giving sub-mg outlet performance.",[180],{"title":181,"url":182},"Wikipedia — Polytetrafluoroethylene","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPolytetrafluoroethylene","glossary\u002Fptfe-membrane-filter-bag","xdkHgDGDp_b3Zu1LKD-pAzJu8fK5YBj49NQ-mU1snOM",[186,419,575,736],{"id":187,"title":141,"aliases":188,"body":191,"category":166,"description":403,"extension":168,"meta":404,"navigation":170,"path":140,"relatedTerms":405,"seo":410,"sources":413,"stem":417,"term":141,"__hash__":418},"glossary\u002Fglossary\u002Ffilter-bag.md",[189,190],"filter bags","bag (baghouse)",{"type":53,"value":192,"toc":398},[193,214,218,228,327,331,364,366],[56,194,58,195,198,199,203,204,208,209,213],{},[60,196,197],{},"filter bag"," is the cylindrical fabric sock that traps particulate inside a ",[81,200,202],{"href":201},"\u002Fglossary\u002Ffabric-filter","fabric filter",". Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the ",[81,205,207],{"href":206},"\u002Fglossary\u002Ftubesheet","tubesheet",", supported internally by a wire ",[81,210,212],{"href":211},"\u002Fglossary\u002Fbag-cage","bag cage"," and sealed at the top by a snap-band collar.",[73,215,217],{"id":216},"media-selection","Media selection",[56,219,220,221,223,224,227],{},"Bag media must match the application temperature, gas chemistry, dust load and cleaning system. See ",[81,222,147],{"href":146}," and ",[81,225,226],{"href":171},"PTFE membrane filter bag",".",[229,230,231,247],"table",{},[232,233,234],"thead",{},[235,236,237,241,244],"tr",{},[238,239,240],"th",{},"Material",[238,242,243],{},"Max continuous temp",[238,245,246],{},"Typical use",[248,249,250,262,273,284,295,306,317],"tbody",{},[235,251,252,256,259],{},[253,254,255],"td",{},"Polyester",[253,257,258],{},"135 °C",[253,260,261],{},"Cement, food, light industrial",[235,263,264,267,270],{},[253,265,266],{},"Polypropylene",[253,268,269],{},"90 °C",[253,271,272],{},"Wet chemistry, washdown",[235,274,275,278,281],{},[253,276,277],{},"Nomex (aramid)",[253,279,280],{},"200 °C",[253,282,283],{},"Asphalt, metallurgical",[235,285,286,289,292],{},[253,287,288],{},"P84 (polyimide)",[253,290,291],{},"240 °C",[253,293,294],{},"Cement, biomass",[235,296,297,300,303],{},[253,298,299],{},"Ryton (PPS)",[253,301,302],{},"190 °C",[253,304,305],{},"Coal-fired utility, sulphur-rich",[235,307,308,311,314],{},[253,309,310],{},"Fibreglass",[253,312,313],{},"260 °C",[253,315,316],{},"Cement, WtE high-temperature",[235,318,319,322,324],{},[253,320,321],{},"PTFE (Teflon)",[253,323,313],{},[253,325,326],{},"Aggressive chemistry, sub-mg outlet",[73,328,330],{"id":329},"failure-modes","Failure modes",[96,332,333,340,346,352,358],{},[99,334,335,339],{},[60,336,337],{},[81,338,152],{"href":88}," — pore choking that raises ΔP",[99,341,342,345],{},[60,343,344],{},"Abrasion"," — wear at the bottom of the bag from falling cake",[99,347,348,351],{},[60,349,350],{},"Thermal degradation"," — exceeding the media's continuous-service rating",[99,353,354,357],{},[60,355,356],{},"Hydrolysis \u002F acid attack"," — at the cold end below the acid dew point",[99,359,360,363],{},[60,361,362],{},"Cage corrosion"," — failure of the cage allows bag collapse",[73,365,133],{"id":132},[96,367,368,373,379,384,388,394],{},[99,369,370],{},[81,371,372],{"href":201},"Fabric filter",[99,374,375],{},[81,376,378],{"href":377},"\u002Fglossary\u002Fbaghouse","Baghouse",[99,380,381],{},[81,382,383],{"href":211},"Bag cage",[99,385,386],{},[81,387,47],{"href":171},[99,389,390],{},[81,391,393],{"href":392},"\u002Fglossary\u002Ffibreglass-filter-bag","Fibreglass filter bag",[99,395,396],{},[81,397,152],{"href":88},{"title":159,"searchDepth":160,"depth":160,"links":399},[400,401,402],{"id":216,"depth":160,"text":217},{"id":329,"depth":160,"text":330},{"id":132,"depth":160,"text":133},"A filter bag is the cylindrical fabric sock that traps particulate inside a fabric filter. Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the tubesheet, supported internally by a wire bag cage and sealed at the top by a snap-band collar.",{},[406,166,407,408,409,174,175],"fabric-filter","bag-cage","ptfe-membrane-filter-bag","fibreglass-filter-bag",{"title":411,"description":412},"Filter bag — the cylindrical fabric element of a baghouse","A filter bag is the cylindrical fabric sock that traps particulate inside a fabric filter. Media selection depends on temperature, gas chemistry, dust load and cleaning cycle.",[414],{"title":415,"url":416},"Wikipedia — Baghouse","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaghouse","glossary\u002Ffilter-bag","c5qm1D9QdtuF4K2dtGAjDJ_qJJmuF0iuEqVTUcRXqww",{"id":420,"title":147,"aliases":421,"body":428,"category":166,"description":559,"extension":168,"meta":560,"navigation":170,"path":146,"relatedTerms":561,"seo":562,"sources":565,"stem":572,"term":573,"__hash__":574},"glossary\u002Fglossary\u002Fp84-nomex-ryton-filter-media.md",[422,423,424,425,426,427],"P84 filter bag","Nomex filter bag","Ryton filter bag","PPS filter bag","polyimide filter bag","aramid filter bag",{"type":53,"value":429,"toc":554},[430,446,450,521,525,538,540],[56,431,432,435,436,223,439,442,443,445],{},[60,433,434],{},"P84",", ",[60,437,438],{},"Nomex",[60,440,441],{},"Ryton"," are three mainstream high-temperature synthetic ",[81,444,173],{"href":140}," media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry.",[73,447,449],{"id":448},"side-by-side","Side-by-side",[229,451,452,470],{},[232,453,454],{},[235,455,456,459,462,465,468],{},[238,457,458],{},"Media",[238,460,461],{},"Polymer",[238,463,464],{},"Continuous max temp",[238,466,467],{},"Strengths",[238,469,246],{},[248,471,472,487,506],{},[235,473,474,476,479,481,484],{},[253,475,438],{},[253,477,478],{},"Meta-aramid",[253,480,280],{},[253,482,483],{},"Good flex life, dimensional stability",[253,485,486],{},"Asphalt, foundry, metallurgical off-gas",[235,488,489,491,494,496,499],{},[253,490,434],{},[253,492,493],{},"Polyimide",[253,495,291],{},[253,497,498],{},"High fibre surface area; excellent dust release; ideal for sticky dust",[253,500,501,502,505],{},"Cement kiln, lime kiln, ",[81,503,504],{"href":103},"biomass",", iron-ore pelletising",[235,507,508,510,513,515,518],{},[253,509,299],{},[253,511,512],{},"Polyphenylene sulphide",[253,514,302],{},[253,516,517],{},"Excellent acid resistance, including sulphurous and dilute mineral acids",[253,519,520],{},"Coal-fired utility baghouses, sulphur recovery, WtE",[73,522,524],{"id":523},"selection-logic","Selection logic",[56,526,527,528,223,531,534,535,227],{},"The choice is usually constrained by two questions: ",[64,529,530],{},"what is the highest continuous temperature?",[64,532,533],{},"is the flue gas chemically aggressive — sulphurous, acidic, hygroscopic?"," P84 is favoured where dust is sticky and temperature is high. Ryton is favoured where SO₂\u002FSO₃ chemistry attacks lesser media. Nomex is the budget high-temperature option for less aggressive duty. For sub-1 mg\u002FNm³ outlets, any of these are typically overlaid with a ",[81,536,537],{"href":171},"PTFE membrane",[73,539,133],{"id":132},[96,541,542,546,550],{},[99,543,544],{},[81,545,141],{"href":140},[99,547,548],{},[81,549,47],{"href":171},[99,551,552],{},[81,553,393],{"href":392},{"title":159,"searchDepth":160,"depth":160,"links":555},[556,557,558],{"id":448,"depth":160,"text":449},{"id":523,"depth":160,"text":524},{"id":132,"depth":160,"text":133},"P84, Nomex and Ryton are three mainstream high-temperature synthetic filter-bag media used in industrial baghouses. Each is engineered for a different combination of temperature and gas chemistry.",{},[173,408,409],{"title":563,"description":564},"P84, Nomex and Ryton — high-temperature synthetic filter media compared","P84 (polyimide), Nomex (aramid) and Ryton (PPS) are the three mainstream high-temperature synthetic filter media for baghouses. Each is matched to a different gas chemistry.",[566,569],{"title":567,"url":568},"Wikipedia — Polyphenylene sulfide","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPolyphenylene_sulfide",{"title":570,"url":571},"Wikipedia — Aramid","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAramid","glossary\u002Fp84-nomex-ryton-filter-media","P84, Nomex and Ryton filter media","4OnX2N85IrlUTdns6Bo5OfpVG45TlyWilO_Te5gJ4vM",{"id":576,"title":152,"aliases":577,"body":580,"category":166,"description":723,"extension":168,"meta":724,"navigation":170,"path":88,"relatedTerms":725,"seo":729,"sources":732,"stem":734,"term":152,"__hash__":735},"glossary\u002Fglossary\u002Fbag-blinding.md",[578,579],"filter bag blinding","bag binding",{"type":53,"value":581,"toc":717},[582,599,603,645,649,670,674,689,691],[56,583,584,586,587,590,591,595,596,598],{},[60,585,152],{}," is the choking of a ",[81,588,589],{"href":140},"filter bag's"," pore structure by dust that has worked its way into the fabric itself rather than remaining on the surface. Once embedded, the dust cannot be released by any normal ",[81,592,594],{"href":593},"\u002Fglossary\u002Fpulse-jet-cleaning-cycle","cleaning cycle","; ",[81,597,84],{"href":83}," rises and stays high. Blinding is the leading cause of premature bag replacement on most industrial baghouses.",[73,600,602],{"id":601},"when-blinding-accelerates","When blinding accelerates",[96,604,605,611,617,623,634],{},[99,606,607,610],{},[60,608,609],{},"Acid dew-point excursions"," — condensed acid bonds dust into the fabric",[99,612,613,616],{},[60,614,615],{},"Hygroscopic dust"," — moisture pickup turns surface dust into a wet paste",[99,618,619,622],{},[60,620,621],{},"Tar or oil aerosol"," in the inlet gas",[99,624,625,633],{},[60,626,627,628,632],{},"Excessive bag-velocity (",[81,629,631],{"href":630},"\u002Fglossary\u002Fair-to-cloth-ratio","air-to-cloth ratio",")"," — forces particulate into the pores",[99,635,636],{},[60,637,638,639,642,643],{},"Sub-micron ash from ",[81,640,641],{"href":103},"WtE"," or ",[81,644,504],{"href":103},[73,646,648],{"id":647},"mitigation","Mitigation",[96,650,651,654,661,664],{},[99,652,653],{},"Maintain gas temperature above the acid dew point (typically 130–150 °C)",[99,655,656,657,660],{},"Use ",[81,658,659],{"href":171},"PTFE-membrane bags"," for surface filtration where chemistry warrants",[99,662,663],{},"Right-size the baghouse so air-to-cloth ratio stays moderate",[99,665,656,666,669],{},[81,667,668],{"href":127},"sonic horns"," to keep cake from consolidating into the medium before each pulse",[73,671,673],{"id":672},"distinguishing-from-cake-bridging","Distinguishing from cake bridging",[56,675,676,680,681,684,685,688],{},[81,677,679],{"href":678},"\u002Fglossary\u002Fcake-bridging-cake-blinding","Cake bridging"," is a ",[64,682,683],{},"cake-on-surface"," problem and is fixable with better cleaning. Blinding is ",[64,686,687],{},"dust-in-fabric"," and is not fixable without bag replacement.",[73,690,133],{"id":132},[96,692,693,698,704,708,713],{},[99,694,695],{},[81,696,697],{"href":678},"Cake bridging \u002F cake blinding",[99,699,700],{},[81,701,703],{"href":702},"\u002Fglossary\u002Ffilter-cake","Filter cake",[99,705,706],{},[81,707,141],{"href":140},[99,709,710],{},[81,711,712],{"href":83},"Differential pressure (baghouse)",[99,714,715],{},[81,716,157],{"href":127},{"title":159,"searchDepth":160,"depth":160,"links":718},[719,720,721,722],{"id":601,"depth":160,"text":602},{"id":647,"depth":160,"text":648},{"id":672,"depth":160,"text":673},{"id":132,"depth":160,"text":133},"Bag blinding is the choking of a filter bag's pore structure by dust that has worked its way into the fabric itself rather than remaining on the surface. Once embedded, the dust cannot be released by any normal cleaning cycle; differential pressure rises and stays high. Blinding is the leading cause of premature bag replacement on most industrial baghouses.",{},[726,727,173,728,128],"cake-bridging-cake-blinding","filter-cake","differential-pressure-baghouse",{"title":730,"description":731},"Bag blinding — pore choking that destroys baghouse performance","Bag blinding is the choking of filter-bag pores by dust embedded within the medium. It raises differential pressure permanently and is the leading cause of premature bag replacement.",[733],{"title":415,"url":416},"glossary\u002Fbag-blinding","-0FrhXk5-j24S5xuHXl-Fl5tAcqRGunLiGuaHiN9eWQ",{"id":737,"title":157,"aliases":738,"body":741,"category":943,"description":944,"extension":168,"meta":945,"navigation":170,"path":127,"relatedTerms":946,"seo":953,"sources":956,"stem":966,"term":157,"__hash__":967},"glossary\u002Fglossary\u002Fsonic-horn.md",[668,739,740],"sonic cleaning horn","industrial sonic horn",{"type":53,"value":742,"toc":936},[743,773,777,785,789,851,855,892,896,904,906],[56,744,58,745,748,749,753,754,435,758,435,761,435,765,223,769,227],{},[60,746,747],{},"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 ",[81,750,752],{"href":751},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[81,755,757],{"href":756},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",[81,759,760],{"href":201},"baghouses",[81,762,764],{"href":763},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[81,766,768],{"href":767},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces",[81,770,772],{"href":771},"\u002Fglossary\u002Fhopper","hoppers and silos",[73,774,776],{"id":775},"how-a-sonic-horn-works","How a sonic horn works",[56,778,779,780,784],{},"Compressed plant air admitted through a ",[81,781,783],{"href":782},"\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.",[73,786,788],{"id":787},"key-parameters","Key parameters",[229,790,791,801],{},[232,792,793],{},[235,794,795,798],{},[238,796,797],{},"Parameter",[238,799,800],{},"Typical range",[248,802,803,811,819,827,835,843],{},[235,804,805,808],{},[253,806,807],{},"Fundamental frequency",[253,809,810],{},"60–400 Hz",[235,812,813,816],{},[253,814,815],{},"Sound pressure level",[253,817,818],{},"140–180 dB",[235,820,821,824],{},[253,822,823],{},"Compressed-air consumption",[253,825,826],{},"8–14 Nm³\u002Fmin at 4–7 bar",[235,828,829,832],{},[253,830,831],{},"Operating temperature (with appropriate materials)",[253,833,834],{},"−40 °C to +500 °C",[235,836,837,840],{},[253,838,839],{},"Firing cycle",[253,841,842],{},"5–15 s burst, repeated every 3–15 minutes",[235,844,845,848],{},[253,846,847],{},"Mass",[253,849,850],{},"15–60 kg depending on horn size",[73,852,854],{"id":853},"frequency-selection","Frequency selection",[56,856,857,858,435,862,866,867,435,871,875,876,435,879,883,884,223,888,227],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[81,859,861],{"href":860},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[81,863,865],{"href":864},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[81,868,870],{"href":869},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[81,872,874],{"href":873},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[81,877,878],{"href":201},"fabric-filter compartments",[81,880,882],{"href":881},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[81,885,887],{"href":886},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[81,889,891],{"href":890},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[73,893,895],{"id":894},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[56,897,898,899,903],{},"Sonic horns are increasingly specified alongside or in place of ",[81,900,902],{"href":901},"\u002Fglossary\u002Fsteam-sootblower","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.",[73,905,133],{"id":132},[96,907,908,913,919,925,931],{},[99,909,910],{},[81,911,912],{"href":751},"Acoustic cleaner",[99,914,915],{},[81,916,918],{"href":917},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[99,920,921],{},[81,922,924],{"href":923},"\u002Fglossary\u002Fbell-horn","Bell horn",[99,926,927],{},[81,928,930],{"href":929},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[99,932,933],{},[81,934,935],{"href":886},"Low-frequency acoustic cleaner",{"title":159,"searchDepth":160,"depth":160,"links":937},[938,939,940,941,942],{"id":775,"depth":160,"text":776},{"id":787,"depth":160,"text":788},{"id":853,"depth":160,"text":854},{"id":894,"depth":160,"text":895},{"id":132,"depth":160,"text":133},"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.",{},[947,948,949,950,951,952],"acoustic-cleaner","acoustic-cleaning-system","sonic-sootblower","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":954,"description":955},"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.",[957,960,963],{"title":958,"url":959},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":961,"url":962},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":964,"url":965},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",1782613721209]