[{"data":1,"prerenderedAt":1149},["ShallowReactive",2],{"site-footer-common":3,"glossary:pulse-jet-cleaning-cycle":45,"glossary-related:pulse-jet-cleaning-cycle":249},{"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":228,"description":229,"extension":230,"meta":231,"navigation":232,"path":233,"relatedTerms":234,"seo":240,"sources":243,"stem":247,"term":47,"__hash__":248},"glossary\u002Fglossary\u002Fpulse-jet-cleaning-cycle.md","Pulse-jet cleaning cycle",[49,50,51],"pulse cycle","pulse-jet cycle","bag pulsing",{"type":53,"value":54,"toc":220},"minimark",[55,75,80,152,156,162,173,176,180,187,191],[56,57,58,59,63,64,69,70,74],"p",{},"The ",[60,61,62],"strong",{},"pulse-jet cleaning cycle"," is the firing pattern of brief compressed-air pulses that clean the ",[65,66,68],"a",{"href":67},"\u002Fglossary\u002Ffilter-bag","filter bags"," of a ",[65,71,73],{"href":72},"\u002Fglossary\u002Fpulse-jet-baghouse","pulse-jet baghouse",". The cycle is controlled by a sequencer (often a baghouse PLC) and is tuned through three primary variables.",[76,77,79],"h2",{"id":78},"cycle-parameters","Cycle parameters",[81,82,83,99],"table",{},[84,85,86],"thead",{},[87,88,89,93,96],"tr",{},[90,91,92],"th",{},"Parameter",[90,94,95],{},"Typical range",[90,97,98],{},"Effect of increasing",[100,101,102,114,130,141],"tbody",{},[87,103,104,108,111],{},[105,106,107],"td",{},"Pulse duration",[105,109,110],{},"100–300 ms",[105,112,113],{},"More cleaning per pulse; more bag flex \u002F wear",[87,115,116,119,122],{},[105,117,118],{},"Pulse interval (continuous mode)",[105,120,121],{},"10–120 s per row",[105,123,124,125,129],{},"Less ",[65,126,128],{"href":127},"\u002Fglossary\u002Ffilter-cake","filter cake"," build-up; more compressed-air use",[87,131,132,135,138],{},[105,133,134],{},"ΔP set-point (on-demand mode)",[105,136,137],{},"12–18 mbar",[105,139,140],{},"Cleaning fires only when ΔP rises; minimum bag wear",[87,142,143,146,149],{},[105,144,145],{},"Pulse pressure",[105,147,148],{},"4–7 bar",[105,150,151],{},"Stronger pulse; deeper penetration into the bag",[76,153,155],{"id":154},"continuous-vs-on-demand-cleaning","Continuous vs on-demand cleaning",[56,157,158,161],{},[60,159,160],{},"Continuous cycling"," runs the cleaning sequence on a fixed schedule regardless of dust load. Simple, but wastes air and bag life on lightly-loaded periods.",[56,163,164,167,168,172],{},[60,165,166],{},"On-demand cleaning"," fires only when ",[65,169,171],{"href":170},"\u002Fglossary\u002Fdifferential-pressure-baghouse","differential pressure"," crosses a set-point. Minimises wear and air use but can fall behind when dust load spikes.",[56,174,175],{},"Most modern baghouses run a hybrid: on-demand control with a maximum-interval limit to prevent indefinite skipping.",[76,177,179],{"id":178},"how-sonic-horns-interact-with-the-pulse-cycle","How sonic horns interact with the pulse cycle",[56,181,182,186],{},[65,183,185],{"href":184},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," running continuously between pulse events keep cake from consolidating, which lets the pulse-jet system run a less aggressive cycle for the same ΔP. The combined OPEX saving (lower compressed-air use, longer bag life) is the headline argument for retrofitting horns onto an existing pulse-jet baghouse.",[76,188,190],{"id":189},"related-terms","Related terms",[192,193,194,200,205,210,215],"ul",{},[195,196,197],"li",{},[65,198,199],{"href":72},"Pulse-jet baghouse",[195,201,202],{},[65,203,204],{"href":67},"Filter bag",[195,206,207],{},[65,208,209],{"href":127},"Filter cake",[195,211,212],{},[65,213,214],{"href":170},"Differential pressure (baghouse)",[195,216,217],{},[65,218,219],{"href":184},"Sonic horn",{"title":221,"searchDepth":222,"depth":222,"links":223},"",2,[224,225,226,227],{"id":78,"depth":222,"text":79},{"id":154,"depth":222,"text":155},{"id":178,"depth":222,"text":179},{"id":189,"depth":222,"text":190},"baghouse","The pulse-jet cleaning cycle is the firing pattern of brief compressed-air pulses that clean the filter bags of a pulse-jet baghouse. The cycle is controlled by a sequencer (often a baghouse PLC) and is tuned through three primary variables.","md",{},true,"\u002Fglossary\u002Fpulse-jet-cleaning-cycle",[235,236,237,238,239],"pulse-jet-baghouse","filter-bag","filter-cake","differential-pressure-baghouse","sonic-horn",{"title":241,"description":242},"Pulse-jet cleaning cycle — pulse duration, interval and on-demand tuning","The pulse-jet cleaning cycle is the firing pattern of compressed-air pulses across a baghouse. Tuned by pulse duration, interval and ΔP set-point to balance cleaning against bag wear.",[244],{"title":245,"url":246},"Micronics — Sonic Horns for Baghouses","https:\u002F\u002Fwww.micronicsinc.com\u002Fdry-baghouse-filtration\u002Fparts\u002Fbaghouse-accessories\u002Fsonic-horns\u002F","glossary\u002Fpulse-jet-cleaning-cycle","xTWyvWFeqO0jdzrM9_SIfkzZDlTkLFSKbX2ESybPeAA",[250,369,593,743,919],{"id":251,"title":199,"aliases":252,"body":256,"category":228,"description":355,"extension":230,"meta":356,"navigation":232,"path":72,"relatedTerms":357,"seo":359,"sources":362,"stem":367,"term":199,"__hash__":368},"glossary\u002Fglossary\u002Fpulse-jet-baghouse.md",[253,254,255],"pulse jet baghouse","pulse-jet filter","PJBH",{"type":53,"value":257,"toc":350},[258,273,277,296,300,303,317,324,326],[56,259,260,261,263,264,268,269,272],{},"A ",[60,262,73],{}," is a ",[65,265,267],{"href":266},"\u002Fglossary\u002Ffabric-filter","fabric filter"," design in which each ",[65,270,271],{"href":67},"filter bag"," is cleaned by a brief, high-pressure pulse of compressed air directed downwards into the open top of the bag. The pulse momentarily reverses the gas flow through the bag wall, dislodges the dust cake, and lets it fall into the hopper. Pulse-jet is the dominant industrial baghouse design for new installations.",[76,274,276],{"id":275},"how-a-pulse-jet-cycle-runs","How a pulse-jet cycle runs",[56,278,279,280,284,285,287,288,292,293,295],{},"Solenoid valves on a manifold above the ",[65,281,283],{"href":282},"\u002Fglossary\u002Ftubesheet","tubesheet"," fire one row at a time, typically every 1–10 minutes during normal operation, more often when ",[65,286,171],{"href":170}," climbs. Pulse duration is 100–300 ms at 4–7 bar. The cleaning is ",[289,290,291],"em",{},"online",": the rest of the baghouse continues filtering during each pulse. See ",[65,294,62],{"href":233},".",[76,297,299],{"id":298},"where-pulse-jet-underperforms","Where pulse-jet underperforms",[56,301,302],{},"Pulse-jet cleaning is highly effective on the bag surface directly under the venturi nozzle, but weaker on:",[192,304,305,308,311,314],{},[195,306,307],{},"Bag rows at the back of the compartment, furthest from the manifold",[195,309,310],{},"The top and bottom inches of each bag where the pulse loses momentum",[195,312,313],{},"Tubesheet area between rows where airborne dust resettles",[195,315,316],{},"Compartment hoppers, which the pulse cannot reach at all",[56,318,319,320,323],{},"Adding ",[65,321,322],{"href":184},"sonic horns"," at the compartment roof and at the hopper wall closes these gaps, reducing total compressed-air consumption per kg of dust cleaned and extending bag life.",[76,325,190],{"id":189},[192,327,328,334,338,342,346],{},[195,329,330],{},[65,331,333],{"href":332},"\u002Fglossary\u002Fbaghouse","Baghouse",[195,335,336],{},[65,337,204],{"href":67},[195,339,340],{},[65,341,47],{"href":233},[195,343,344],{},[65,345,214],{"href":170},[195,347,348],{},[65,349,219],{"href":184},{"title":221,"searchDepth":222,"depth":222,"links":351},[352,353,354],{"id":275,"depth":222,"text":276},{"id":298,"depth":222,"text":299},{"id":189,"depth":222,"text":190},"A pulse-jet baghouse is a fabric filter design in which each filter bag is cleaned by a brief, high-pressure pulse of compressed air directed downwards into the open top of the bag. The pulse momentarily reverses the gas flow through the bag wall, dislodges the dust cake, and lets it fall into the hopper. Pulse-jet is the dominant industrial baghouse design for new installations.",{},[228,236,358,238,239],"pulse-jet-cleaning-cycle",{"title":360,"description":361},"Pulse-jet baghouse — short reverse-pulse cleaning while online","A pulse-jet baghouse cleans bags with brief, high-pressure reverse-air pulses while staying on-line. The dominant industrial fabric-filter design for new installations.",[363,366],{"title":364,"url":365},"Wikipedia — Baghouse","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaghouse",{"title":245,"url":246},"glossary\u002Fpulse-jet-baghouse","oII2ot9x7DDD5B_k0HtTsFgDF5ZIGi7x0O0Qc826Jlo",{"id":370,"title":204,"aliases":371,"body":373,"category":228,"description":577,"extension":230,"meta":578,"navigation":232,"path":67,"relatedTerms":579,"seo":586,"sources":589,"stem":591,"term":204,"__hash__":592},"glossary\u002Fglossary\u002Ffilter-bag.md",[68,372],"bag (baghouse)",{"type":53,"value":374,"toc":572},[375,391,395,407,500,504,539,541],[56,376,260,377,379,380,382,383,385,386,390],{},[60,378,271],{}," is the cylindrical fabric sock that traps particulate inside a ",[65,381,267],{"href":266},". Bags are typically 120–300 mm in diameter and 2–10 m long, suspended vertically from the ",[65,384,283],{"href":282},", supported internally by a wire ",[65,387,389],{"href":388},"\u002Fglossary\u002Fbag-cage","bag cage"," and sealed at the top by a snap-band collar.",[76,392,394],{"id":393},"media-selection","Media selection",[56,396,397,398,402,403,295],{},"Bag media must match the application temperature, gas chemistry, dust load and cleaning system. See ",[65,399,401],{"href":400},"\u002Fglossary\u002Fp84-nomex-ryton-filter-media","P84 \u002F Nomex \u002F Ryton filter media"," and ",[65,404,406],{"href":405},"\u002Fglossary\u002Fptfe-membrane-filter-bag","PTFE membrane filter bag",[81,408,409,422],{},[84,410,411],{},[87,412,413,416,419],{},[90,414,415],{},"Material",[90,417,418],{},"Max continuous temp",[90,420,421],{},"Typical use",[100,423,424,435,446,457,468,479,490],{},[87,425,426,429,432],{},[105,427,428],{},"Polyester",[105,430,431],{},"135 °C",[105,433,434],{},"Cement, food, light industrial",[87,436,437,440,443],{},[105,438,439],{},"Polypropylene",[105,441,442],{},"90 °C",[105,444,445],{},"Wet chemistry, washdown",[87,447,448,451,454],{},[105,449,450],{},"Nomex (aramid)",[105,452,453],{},"200 °C",[105,455,456],{},"Asphalt, metallurgical",[87,458,459,462,465],{},[105,460,461],{},"P84 (polyimide)",[105,463,464],{},"240 °C",[105,466,467],{},"Cement, biomass",[87,469,470,473,476],{},[105,471,472],{},"Ryton (PPS)",[105,474,475],{},"190 °C",[105,477,478],{},"Coal-fired utility, sulphur-rich",[87,480,481,484,487],{},[105,482,483],{},"Fibreglass",[105,485,486],{},"260 °C",[105,488,489],{},"Cement, WtE high-temperature",[87,491,492,495,497],{},[105,493,494],{},"PTFE (Teflon)",[105,496,486],{},[105,498,499],{},"Aggressive chemistry, sub-mg outlet",[76,501,503],{"id":502},"failure-modes","Failure modes",[192,505,506,515,521,527,533],{},[195,507,508,514],{},[60,509,510],{},[65,511,513],{"href":512},"\u002Fglossary\u002Fbag-blinding","Bag blinding"," — pore choking that raises ΔP",[195,516,517,520],{},[60,518,519],{},"Abrasion"," — wear at the bottom of the bag from falling cake",[195,522,523,526],{},[60,524,525],{},"Thermal degradation"," — exceeding the media's continuous-service rating",[195,528,529,532],{},[60,530,531],{},"Hydrolysis \u002F acid attack"," — at the cold end below the acid dew point",[195,534,535,538],{},[60,536,537],{},"Cage corrosion"," — failure of the cage allows bag collapse",[76,540,190],{"id":189},[192,542,543,548,552,557,562,568],{},[195,544,545],{},[65,546,547],{"href":266},"Fabric filter",[195,549,550],{},[65,551,333],{"href":332},[195,553,554],{},[65,555,556],{"href":388},"Bag cage",[195,558,559],{},[65,560,561],{"href":405},"PTFE-membrane filter bag",[195,563,564],{},[65,565,567],{"href":566},"\u002Fglossary\u002Ffibreglass-filter-bag","Fibreglass filter bag",[195,569,570],{},[65,571,513],{"href":512},{"title":221,"searchDepth":222,"depth":222,"links":573},[574,575,576],{"id":393,"depth":222,"text":394},{"id":502,"depth":222,"text":503},{"id":189,"depth":222,"text":190},"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.",{},[580,228,581,582,583,584,585],"fabric-filter","bag-cage","ptfe-membrane-filter-bag","fibreglass-filter-bag","p84-nomex-ryton-filter-media","bag-blinding",{"title":587,"description":588},"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.",[590],{"title":364,"url":365},"glossary\u002Ffilter-bag","c5qm1D9QdtuF4K2dtGAjDJ_qJJmuF0iuEqVTUcRXqww",{"id":594,"title":209,"aliases":595,"body":598,"category":228,"description":730,"extension":230,"meta":731,"navigation":232,"path":127,"relatedTerms":732,"seo":734,"sources":737,"stem":741,"term":209,"__hash__":742},"glossary\u002Fglossary\u002Ffilter-cake.md",[596,597],"dust cake","filter cake layer",{"type":53,"value":599,"toc":725},[600,611,615,662,666,699,704,706],[56,601,602,604,605,607,608,610],{},[60,603,209],{}," is the dust layer that progressively builds up on the gas-side surface of a ",[65,606,271],{"href":67}," during normal operation. Counter-intuitively, the cake itself performs most of the fine-particle filtration: a fresh bag with no cake has higher penetration than a bag with a developed cake. The art of baghouse operation is to maintain a useful cake without letting it grow so thick that ",[65,609,171],{"href":170}," climbs unsustainably.",[76,612,614],{"id":613},"cake-life-cycle","Cake life cycle",[616,617,618,624,630,650,656],"ol",{},[195,619,620,623],{},[60,621,622],{},"Conditioning"," — a new or freshly cleaned bag is \"pre-coated\" by initial dust loading",[195,625,626,629],{},[60,627,628],{},"Steady-state filtration"," — the cake builds, ΔP rises slowly, outlet remains low",[195,631,632,635,636,639,640,644,645,649],{},[60,633,634],{},"Cleaning cycle"," — ",[65,637,638],{"href":233},"pulse-jet",", ",[65,641,643],{"href":642},"\u002Fglossary\u002Freverse-air-baghouse","reverse-air"," or ",[65,646,648],{"href":647},"\u002Fglossary\u002Fshaker-baghouse","shaker"," releases part of the cake",[195,651,652,655],{},[60,653,654],{},"Residual cake"," — a thin layer remains; ΔP resets but not to zero",[195,657,658,661],{},[60,659,660],{},"Long-term drift"," — over many cycles, residual cake gradually thickens, eventually requiring offline cleaning or bag change",[76,663,665],{"id":664},"how-cake-behaviour-varies","How cake behaviour varies",[192,667,668,674,684,693],{},[195,669,670,673],{},[60,671,672],{},"Coal fly ash"," — releases relatively cleanly under pulse-jet",[195,675,676,679,680],{},[60,677,678],{},"Cement kiln dust"," — can be sticky, prone to ",[65,681,683],{"href":682},"\u002Fglossary\u002Fcake-bridging-cake-blinding","bridging",[195,685,686,689,690,692],{},[60,687,688],{},"Wet or hygroscopic dusts"," — cake hardens; classic ",[65,691,585],{"href":512}," risk",[195,694,695,698],{},[60,696,697],{},"Sub-micron biomass \u002F WtE ash"," — fine cake bonds firmly to bag surface",[56,700,701,703],{},[65,702,185],{"href":184}," supplement primary cleaning by addressing residual cake before it consolidates.",[76,705,190],{"id":189},[192,707,708,712,717,721],{},[195,709,710],{},[65,711,204],{"href":67},[195,713,714],{},[65,715,716],{"href":682},"Cake bridging \u002F cake blinding",[195,718,719],{},[65,720,513],{"href":512},[195,722,723],{},[65,724,214],{"href":170},{"title":221,"searchDepth":222,"depth":222,"links":726},[727,728,729],{"id":613,"depth":222,"text":614},{"id":664,"depth":222,"text":665},{"id":189,"depth":222,"text":190},"Filter cake is the dust layer that progressively builds up on the gas-side surface of a filter bag during normal operation. Counter-intuitively, the cake itself performs most of the fine-particle filtration: a fresh bag with no cake has higher penetration than a bag with a developed cake. The art of baghouse operation is to maintain a useful cake without letting it grow so thick that differential pressure climbs unsustainably.",{},[236,733,585,238,358],"cake-bridging-cake-blinding",{"title":735,"description":736},"Filter cake — the dust layer that performs most of the filtration","Filter cake is the dust layer that builds up on the surface of a baghouse filter bag. The cake itself does most of the fine-particle filtration; cleaning balances cake build-up against ΔP.",[738],{"title":739,"url":740},"Wikipedia — Filter cake","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFilter_cake","glossary\u002Ffilter-cake","i7km6mXaz39JRBZKEHi5VmJkbsQH_9lsoFWRNtoUZrI",{"id":744,"title":214,"aliases":745,"body":750,"category":228,"description":907,"extension":230,"meta":908,"navigation":232,"path":170,"relatedTerms":909,"seo":910,"sources":913,"stem":917,"term":214,"__hash__":918},"glossary\u002Fglossary\u002Fdifferential-pressure-baghouse.md",[746,747,748,749],"baghouse ΔP","baghouse delta-P","filter ΔP","baghouse dP",{"type":53,"value":751,"toc":901},[752,771,775,853,857,864,868,873,875],[56,753,754,757,758,760,761,765,766,644,768,295],{},[60,755,756],{},"Differential pressure (ΔP)"," across a ",[65,759,228],{"href":332}," is the pressure drop between the dirty-gas inlet ",[65,762,764],{"href":763},"\u002Fglossary\u002Fplenum-clean-side-dirty-side","plenum"," and the clean-gas outlet plenum. ΔP is the headline operational KPI for any fabric filter: too low signals broken bags or open compartments, too high signals fouling, ",[65,767,683],{"href":682},[65,769,770],{"href":512},"blinding",[76,772,774],{"id":773},"typical-operating-bands","Typical operating bands",[81,776,777,793],{},[84,778,779],{},[87,780,781,784,787,790],{},[90,782,783],{},"Application",[90,785,786],{},"Normal ΔP",[90,788,789],{},"Alarm",[90,791,792],{},"Trip",[100,794,795,811,827,840],{},[87,796,797,802,805,808],{},[105,798,799,800],{},"Cement ",[65,801,638],{"href":72},[105,803,804],{},"8–15 mbar (3–6 inWG)",[105,806,807],{},"20 mbar",[105,809,810],{},"25 mbar",[87,812,813,818,821,824],{},[105,814,815,816],{},"Coal utility ",[65,817,643],{"href":642},[105,819,820],{},"10–18 mbar",[105,822,823],{},"22 mbar",[105,825,826],{},"28 mbar",[87,828,829,832,835,837],{},[105,830,831],{},"WtE pulse-jet",[105,833,834],{},"12–20 mbar",[105,836,810],{},[105,838,839],{},"32 mbar",[87,841,842,845,848,851],{},[105,843,844],{},"Light industrial pulse-jet",[105,846,847],{},"5–12 mbar",[105,849,850],{},"18 mbar",[105,852,810],{},[76,854,856],{"id":855},"why-operators-obsess-over-δp","Why operators obsess over ΔP",[56,858,859,860,863],{},"Every additional mbar of ΔP costs ID-fan power and reduces plant throughput. A 5-mbar ΔP rise on a large coal-fired baghouse can mean hundreds of kW of additional fan power and the loss of a few MW of derate-induced generation. Sustained high ΔP also accelerates ",[65,861,862],{"href":512},"bag blinding"," and triggers premature bag-change campaigns.",[76,865,867],{"id":866},"how-sonic-horns-reduce-δp","How sonic horns reduce ΔP",[56,869,870,872],{},[65,871,185],{"href":184}," keep the bag-surface cake from consolidating into the medium between primary cleaning cycles. Pulse-jet, reverse-air or shaker cleaning then has less work to do and removes a larger fraction of the cake. Plants retrofitting sonic horns commonly see 2–5 mbar ΔP reduction and 25–40% extension of bag life.",[76,874,190],{"id":189},[192,876,877,881,885,889,893,897],{},[195,878,879],{},[65,880,547],{"href":266},[195,882,883],{},[65,884,333],{"href":332},[195,886,887],{},[65,888,209],{"href":127},[195,890,891],{},[65,892,513],{"href":512},[195,894,895],{},[65,896,47],{"href":233},[195,898,899],{},[65,900,219],{"href":184},{"title":221,"searchDepth":222,"depth":222,"links":902},[903,904,905,906],{"id":773,"depth":222,"text":774},{"id":855,"depth":222,"text":856},{"id":866,"depth":222,"text":867},{"id":189,"depth":222,"text":190},"Differential pressure (ΔP) across a baghouse is the pressure drop between the dirty-gas inlet plenum and the clean-gas outlet plenum. ΔP is the headline operational KPI for any fabric filter: too low signals broken bags or open compartments, too high signals fouling, bridging or blinding.",{},[580,228,237,585,358,239],{"title":911,"description":912},"Differential pressure (baghouse ΔP) — the headline KPI for fabric filters","Differential pressure (ΔP) across a baghouse is the pressure drop between dirty and clean plenums. It is the headline operational KPI: too low signals broken bags, too high signals fouling.",[914],{"title":915,"url":916},"Sly Inc — How to Monitor Baghouse Health Through Differential Pressure","https:\u002F\u002Fwww.slyinc.com\u002Fblog\u002Fhow-to-monitor-baghouse-health-through-differential-pressure\u002F","glossary\u002Fdifferential-pressure-baghouse","5pIag8o_scInCb_UF6sVlqlEgtkNoIR5M4nNm3qHxk4",{"id":920,"title":219,"aliases":921,"body":924,"category":1124,"description":1125,"extension":230,"meta":1126,"navigation":232,"path":184,"relatedTerms":1127,"seo":1134,"sources":1137,"stem":1147,"term":219,"__hash__":1148},"glossary\u002Fglossary\u002Fsonic-horn.md",[322,922,923],"sonic cleaning horn","industrial sonic horn",{"type":53,"value":925,"toc":1117},[926,956,960,968,972,1032,1036,1073,1077,1085,1087],[56,927,260,928,931,932,936,937,639,941,639,944,639,948,402,952,295],{},[60,929,930],{},"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 ",[65,933,935],{"href":934},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[65,938,940],{"href":939},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",[65,942,943],{"href":266},"baghouses",[65,945,947],{"href":946},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[65,949,951],{"href":950},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces",[65,953,955],{"href":954},"\u002Fglossary\u002Fhopper","hoppers and silos",[76,957,959],{"id":958},"how-a-sonic-horn-works","How a sonic horn works",[56,961,962,963,967],{},"Compressed plant air admitted through a ",[65,964,966],{"href":965},"\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.",[76,969,971],{"id":970},"key-parameters","Key parameters",[81,973,974,982],{},[84,975,976],{},[87,977,978,980],{},[90,979,92],{},[90,981,95],{},[100,983,984,992,1000,1008,1016,1024],{},[87,985,986,989],{},[105,987,988],{},"Fundamental frequency",[105,990,991],{},"60–400 Hz",[87,993,994,997],{},[105,995,996],{},"Sound pressure level",[105,998,999],{},"140–180 dB",[87,1001,1002,1005],{},[105,1003,1004],{},"Compressed-air consumption",[105,1006,1007],{},"8–14 Nm³\u002Fmin at 4–7 bar",[87,1009,1010,1013],{},[105,1011,1012],{},"Operating temperature (with appropriate materials)",[105,1014,1015],{},"−40 °C to +500 °C",[87,1017,1018,1021],{},[105,1019,1020],{},"Firing cycle",[105,1022,1023],{},"5–15 s burst, repeated every 3–15 minutes",[87,1025,1026,1029],{},[105,1027,1028],{},"Mass",[105,1030,1031],{},"15–60 kg depending on horn size",[76,1033,1035],{"id":1034},"frequency-selection","Frequency selection",[56,1037,1038,1039,639,1043,1047,1048,639,1052,1056,1057,639,1060,1064,1065,402,1069,295],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[65,1040,1042],{"href":1041},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[65,1044,1046],{"href":1045},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[65,1049,1051],{"href":1050},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[65,1053,1055],{"href":1054},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[65,1058,1059],{"href":266},"fabric-filter compartments",[65,1061,1063],{"href":1062},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[65,1066,1068],{"href":1067},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[65,1070,1072],{"href":1071},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[76,1074,1076],{"id":1075},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[56,1078,1079,1080,1084],{},"Sonic horns are increasingly specified alongside or in place of ",[65,1081,1083],{"href":1082},"\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.",[76,1086,190],{"id":189},[192,1088,1089,1094,1100,1106,1112],{},[195,1090,1091],{},[65,1092,1093],{"href":934},"Acoustic cleaner",[195,1095,1096],{},[65,1097,1099],{"href":1098},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[195,1101,1102],{},[65,1103,1105],{"href":1104},"\u002Fglossary\u002Fbell-horn","Bell horn",[195,1107,1108],{},[65,1109,1111],{"href":1110},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[195,1113,1114],{},[65,1115,1116],{"href":1067},"Low-frequency acoustic cleaner",{"title":221,"searchDepth":222,"depth":222,"links":1118},[1119,1120,1121,1122,1123],{"id":958,"depth":222,"text":959},{"id":970,"depth":222,"text":971},{"id":1034,"depth":222,"text":1035},{"id":1075,"depth":222,"text":1076},{"id":189,"depth":222,"text":190},"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.",{},[1128,1129,1130,1131,1132,1133],"acoustic-cleaner","acoustic-cleaning-system","sonic-sootblower","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":1135,"description":1136},"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.",[1138,1141,1144],{"title":1139,"url":1140},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":1142,"url":1143},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":1145,"url":1146},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",1782613721237]