[{"data":1,"prerenderedAt":857},["ShallowReactive",2],{"site-footer-common":3,"glossary:mass-loading":45,"glossary-related:mass-loading":214},{"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":195,"description":196,"extension":197,"meta":198,"navigation":199,"path":200,"relatedTerms":201,"seo":205,"sources":208,"stem":212,"term":47,"__hash__":213},"glossary\u002Fglossary\u002Fmass-loading.md","Mass loading",[49,50,51],"dust loading","particulate loading","PM loading",{"type":53,"value":54,"toc":189},"minimark",[55,78,83,151,159,163],[56,57,58,61,62,67,68,72,73,77],"p",{},[59,60,47],"strong",{}," is the particulate mass concentration in flue gas, typically expressed in g\u002FNm³ (boiler inlet) or mg\u002FNm³ (cleaned outlet). Mass loading at the inlet of an ",[63,64,66],"a",{"href":65},"\u002Fglossary\u002Felectrostatic-precipitator","ESP"," or ",[63,69,71],{"href":70},"\u002Fglossary\u002Fbaghouse","baghouse"," is the basis for sizing the equipment — higher inlet loading demands greater ",[63,74,76],{"href":75},"\u002Fglossary\u002Fspecific-collection-area","collecting area"," or more bag area to meet the same outlet target.",[79,80,82],"h2",{"id":81},"typical-inlet-mass-loadings","Typical inlet mass loadings",[84,85,86,99],"table",{},[87,88,89],"thead",{},[90,91,92,96],"tr",{},[93,94,95],"th",{},"Source",[93,97,98],{},"Approximate inlet loading",[100,101,102,111,119,127,135,143],"tbody",{},[90,103,104,108],{},[105,106,107],"td",{},"Coal-fired utility boiler",[105,109,110],{},"10–40 g\u002FNm³",[90,112,113,116],{},[105,114,115],{},"Cement kiln",[105,117,118],{},"15–80 g\u002FNm³",[90,120,121,124],{},[105,122,123],{},"Iron-ore sintering",[105,125,126],{},"5–15 g\u002FNm³",[90,128,129,132],{},[105,130,131],{},"WtE boiler",[105,133,134],{},"4–10 g\u002FNm³",[90,136,137,140],{},[105,138,139],{},"Biomass boiler",[105,141,142],{},"3–8 g\u002FNm³",[90,144,145,148],{},[105,146,147],{},"Gas-fired combined cycle",[105,149,150],{},"\u003C 0.05 g\u002FNm³",[56,152,153,154,158],{},"Outlet loadings after particulate control are typically 5–30 mg\u002FNm³ (ESP) or 1–10 mg\u002FNm³ (baghouse), often with sub-1 mg\u002FNm³ achievable on tight-emission applications using ",[63,155,157],{"href":156},"\u002Fglossary\u002Fptfe-membrane-filter-bag","PTFE membrane bags",".",[79,160,162],{"id":161},"related-terms","Related terms",[164,165,166,173,178,183],"ul",{},[167,168,169],"li",{},[63,170,172],{"href":171},"\u002Fglossary\u002Fparticulate-matter","Particulate matter",[167,174,175],{},[63,176,177],{"href":65},"Electrostatic precipitator",[167,179,180],{},[63,181,182],{"href":70},"Baghouse",[167,184,185],{},[63,186,188],{"href":187},"\u002Fglossary\u002Fcollection-efficiency","Collection efficiency",{"title":190,"searchDepth":191,"depth":191,"links":192},"",2,[193,194],{"id":81,"depth":191,"text":82},{"id":161,"depth":191,"text":162},"kpis-measurements","Mass loading is the particulate mass concentration in flue gas, typically expressed in g\u002FNm³ (boiler inlet) or mg\u002FNm³ (cleaned outlet). Mass loading at the inlet of an ESP or baghouse is the basis for sizing the equipment — higher inlet loading demands greater collecting area or more bag area to meet the same outlet target.","md",{},true,"\u002Fglossary\u002Fmass-loading",[202,203,71,204],"particulate-matter","electrostatic-precipitator","collection-efficiency",{"title":206,"description":207},"Mass loading — particulate mass concentration in flue gas","Mass loading is particulate mass concentration in flue gas, typically expressed in g\u002FNm³ or mg\u002FNm³. The basis for sizing ESP and baghouse equipment.",[209],{"title":210,"url":211},"Wikipedia — Particulate matter","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FParticulate_matter","glossary\u002Fmass-loading","DY-NsQDa17oAvhV7JrP-Y9gXw22MFeE42AXIYbq-18k",[215,356,538,664],{"id":216,"title":217,"aliases":218,"body":224,"category":195,"description":344,"extension":197,"meta":345,"navigation":199,"path":171,"relatedTerms":346,"seo":349,"sources":352,"stem":354,"term":172,"__hash__":355},"glossary\u002Fglossary\u002Fparticulate-matter.md","Particulate matter (PM)",[219,220,221,222,223],"PM","PM10","PM2.5","PM1","particulate",{"type":53,"value":225,"toc":339},[226,231,286,290,301,305,317,319],[56,227,228,230],{},[59,229,217],{}," is airborne solid or liquid particulate. PM is categorised by aerodynamic diameter:",[84,232,233,246],{},[87,234,235],{},[90,236,237,240,243],{},[93,238,239],{},"Category",[93,241,242],{},"Diameter",[93,244,245],{},"Health and capture significance",[100,247,248,264,275],{},[90,249,250,253,256],{},[105,251,252],{},"PM₁₀",[105,254,255],{},"\u003C 10 µm",[105,257,258,259,261,262],{},"Inhalable; permit-limited; captured by ",[63,260,66],{"href":65}," and ",[63,263,71],{"href":70},[90,265,266,269,272],{},[105,267,268],{},"PM₂.₅",[105,270,271],{},"\u003C 2.5 µm",[105,273,274],{},"Respirable; tighter permit limits; demands high-efficiency control",[90,276,277,280,283],{},[105,278,279],{},"PM₁",[105,281,282],{},"\u003C 1 µm",[105,284,285],{},"Reaches deep lung; most health-significant; hardest to capture",[79,287,289],{"id":288},"smaller-pm-is-harder-to-capture","Smaller PM is harder to capture",[56,291,292,293,296,297,300],{},"ESPs and baghouses both capture larger particulate more easily than smaller. PM₁ capture demands either ",[63,294,295],{"href":156},"PTFE-membrane bags"," (baghouse) or carefully-tuned ESP fields with adequate ",[63,298,299],{"href":75},"SCA",". Fouling that degrades either system has its first visible impact on fine PM penetration.",[79,302,304],{"id":303},"sonic-horns-and-pm-control","Sonic horns and PM control",[56,306,307,311,312,316],{},[63,308,310],{"href":309},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," preserve ESP and baghouse collection efficiency across the operating cycle by preventing the dust-layer thickening or ",[63,313,315],{"href":314},"\u002Fglossary\u002Fbag-blinding","bag blinding"," that would otherwise compromise fine-PM capture.",[79,318,162],{"id":161},[164,320,321,327,331,335],{},[167,322,323],{},[63,324,326],{"href":325},"\u002Fglossary\u002Fopacity","Opacity",[167,328,329],{},[63,330,177],{"href":65},[167,332,333],{},[63,334,182],{"href":70},[167,336,337],{},[63,338,47],{"href":200},{"title":190,"searchDepth":191,"depth":191,"links":340},[341,342,343],{"id":288,"depth":191,"text":289},{"id":303,"depth":191,"text":304},{"id":161,"depth":191,"text":162},"Particulate matter (PM) is airborne solid or liquid particulate. PM is categorised by aerodynamic diameter:",{},[347,203,71,348],"opacity","mass-loading",{"title":350,"description":351},"Particulate matter (PM, PM10, PM2.5) — regulated airborne particulate","Particulate matter is regulated airborne particulate. PM10 = below 10 µm aerodynamic diameter; PM2.5 = below 2.5 µm; PM1 = below 1 µm. Smaller is more health-significant and harder to capture.",[353],{"title":210,"url":211},"glossary\u002Fparticulate-matter","IlViiL35TtRKwPE6q8ke7mjs_8OgrFqWieHPTbI0g4g",{"id":357,"title":358,"aliases":359,"body":362,"category":512,"description":513,"extension":197,"meta":514,"navigation":199,"path":65,"relatedTerms":515,"seo":523,"sources":526,"stem":536,"term":177,"__hash__":537},"glossary\u002Fglossary\u002Felectrostatic-precipitator.md","Electrostatic precipitator (ESP)",[66,360,361],"electrostatic precipitators","dry ESP",{"type":53,"value":363,"toc":506},[364,380,384,402,406,441,445,477,479],[56,365,366,367,370,371,375,376,379],{},"An ",[59,368,369],{},"electrostatic precipitator (ESP)"," is an air-pollution-control device that removes particulate matter from a flue-gas stream by electrostatically charging dust particles and collecting them on grounded plate electrodes. ESPs are the dominant particulate-control technology on coal-fired boilers, cement kilns, ",[63,372,374],{"href":373},"\u002Fglossary\u002Fwaste-to-energy","waste-to-energy"," plants, ",[63,377,378],{"href":373},"biomass"," plants, sinter strands and many other heavy-industry off-gas streams.",[79,381,383],{"id":382},"how-an-esp-works","How an ESP works",[56,385,386,387,391,392,396,397,401],{},"Flue gas flows horizontally between a parallel array of vertical ",[63,388,390],{"href":389},"\u002Fglossary\u002Fcollecting-electrode","collecting electrodes"," (plates) and ",[63,393,395],{"href":394},"\u002Fglossary\u002Fdischarge-electrode","discharge electrodes"," (high-voltage wires or rigid spikes). A negative DC potential of 40–80 kV applied to the discharge electrodes generates a ",[63,398,400],{"href":399},"\u002Fglossary\u002Fcorona-discharge","corona discharge"," that ionises the gas. Charged dust particles drift to the collecting plates, accumulate as a dust layer, are rapped down into hoppers below and removed by ash-handling equipment.",[79,403,405],{"id":404},"where-sonic-horns-fit","Where sonic horns fit",[56,407,408,409,413,414,416,417,421,422,426,427,431,432,436,437,158],{},"ESPs accumulate dust faster than mechanical rapping can release it, and hoppers below ESP fields routinely ",[63,410,412],{"href":411},"\u002Fglossary\u002Fbridging","bridge"," and choke. ",[63,415,310],{"href":309}," installed on the ESP ",[63,418,420],{"href":419},"\u002Fglossary\u002Fesp-penthouse","penthouse"," and on hopper walls keep dust dislodged, supplement ",[63,423,425],{"href":424},"\u002Fglossary\u002Fesp-rapper","rappers",", prevent ",[63,428,430],{"href":429},"\u002Fglossary\u002Fback-corona","back-corona"," by limiting plate dust thickness, and eliminate hopper ",[63,433,435],{"href":434},"\u002Fglossary\u002Frat-holing","rat-holing"," without the structural fatigue of ",[63,438,440],{"href":439},"\u002Fglossary\u002Ftumbling-hammer-rapper","tumbling-hammer rappers",[79,442,444],{"id":443},"common-failure-modes","Common failure modes",[164,446,447,453,459,465,471],{},[167,448,449,452],{},[59,450,451],{},"High opacity \u002F particulate emissions"," from thick dust layers reducing collection efficiency",[167,454,455,458],{},[59,456,457],{},"Back-corona"," in high-resistivity ash that reverses ionisation and collapses collection",[167,460,461,464],{},[59,462,463],{},"Re-entrainment"," as rapper puffs return dust to the gas stream",[167,466,467,470],{},[59,468,469],{},"Hopper bridging"," that stops ash extraction and triggers field shutdowns",[167,472,473,476],{},[59,474,475],{},"Discharge-electrode breakage"," from rapper fatigue or sparking",[79,478,162],{"id":161},[164,480,481,486,491,495,501],{},[167,482,483],{},[63,484,485],{"href":389},"Collecting electrode",[167,487,488],{},[63,489,490],{"href":394},"Discharge electrode",[167,492,493],{},[63,494,457],{"href":429},[167,496,497],{},[63,498,500],{"href":499},"\u002Fglossary\u002Fesp-hopper","ESP hopper",[167,502,503],{},[63,504,505],{"href":309},"Sonic horn",{"title":190,"searchDepth":191,"depth":191,"links":507},[508,509,510,511],{"id":382,"depth":191,"text":383},{"id":404,"depth":191,"text":405},{"id":443,"depth":191,"text":444},{"id":161,"depth":191,"text":162},"esp","An electrostatic precipitator (ESP) is an air-pollution-control device that removes particulate matter from a flue-gas stream by electrostatically charging dust particles and collecting them on grounded plate electrodes. ESPs are the dominant particulate-control technology on coal-fired boilers, cement kilns, waste-to-energy plants, biomass plants, sinter strands and many other heavy-industry off-gas streams.",{},[516,517,518,519,520,521,430,522],"wet-esp","collecting-electrode","discharge-electrode","corona-discharge","esp-hopper","esp-rapper","sonic-horn",{"title":524,"description":525},"Electrostatic precipitator (ESP) — how it works and how it fouls","An ESP removes particulate from flue gas by charging dust and collecting it on plate electrodes. Sonic horns are widely used to dislodge ash from plates and to keep hoppers from bridging.",[527,530,533],{"title":528,"url":529},"Wikipedia — Electrostatic precipitator","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FElectrostatic_precipitator",{"title":531,"url":532},"EPA — Monitoring Knowledge Base: Electrostatic Precipitators","https:\u002F\u002Fwww.epa.gov\u002Fair-emissions-monitoring-knowledge-base\u002Fmonitoring-control-technique-electrostatic-precipitators",{"title":534,"url":535},"Babcock & Wilcox — Basics of ESP Operation","https:\u002F\u002Fwww.babcock.com\u002Fhome\u002Fabout\u002Fresources\u002Flearning-center\u002Fbasic-esp-operation","glossary\u002Felectrostatic-precipitator","hT_C4hmid3iZaYWhLpiSJ2tBfL0bSJ-uhzn7TY4Vtj4",{"id":539,"title":182,"aliases":540,"body":544,"category":71,"description":648,"extension":197,"meta":649,"navigation":199,"path":70,"relatedTerms":650,"seo":655,"sources":658,"stem":662,"term":182,"__hash__":663},"glossary\u002Fglossary\u002Fbaghouse.md",[541,542,543],"baghouses","bag filter house","dust collector house",{"type":53,"value":545,"toc":643},[546,567,571,583,587,590,607,609],[56,547,548,549,551,552,556,557,561,562,566],{},"A ",[59,550,71],{}," is the structural enclosure that houses the bags, cages, cleaning system, ",[63,553,555],{"href":554},"\u002Fglossary\u002Ftubesheet","tubesheet",", ",[63,558,560],{"href":559},"\u002Fglossary\u002Fplenum-clean-side-dirty-side","plenums"," and hoppers of a ",[63,563,565],{"href":564},"\u002Fglossary\u002Ffabric-filter","fabric-filter"," dust collector. The word is used in both broad (\"the plant has a 12-compartment baghouse\") and narrow (\"a baghouse is the housing, the fabric filter is the system\") senses; in everyday industry practice the two terms overlap.",[79,568,570],{"id":569},"compartmented-design","Compartmented design",[56,572,573,574,578,579,582],{},"Large industrial baghouses are subdivided into several compartments — each with its own gas-flow damper — so that one compartment can be isolated for offline cleaning or bag replacement while the rest stay online. The standard ",[63,575,577],{"href":576},"\u002Fglossary\u002Fpulse-jet-baghouse","pulse-jet"," compartment count for utility duty is 8–16; cement and ",[63,580,581],{"href":373},"WtE"," baghouses may run 20+.",[79,584,586],{"id":585},"why-sonic-horns-help","Why sonic horns help",[56,588,589],{},"Sonic horns mounted at compartment level address fouling that the primary cleaning system (pulse-jet, reverse-air or shaker) cannot reach:",[164,591,592,595,601,604],{},[167,593,594],{},"Bag-row dead zones at the back of the compartment",[167,596,597,600],{},[63,598,599],{"href":554},"Tubesheet"," area dust deposits",[167,602,603],{},"Hopper bridging below the bags",[167,605,606],{},"Inlet-plenum dust dropout",[79,608,162],{"id":161},[164,610,611,616,621,627,633,639],{},[167,612,613],{},[63,614,615],{"href":564},"Fabric filter",[167,617,618],{},[63,619,620],{"href":576},"Pulse-jet baghouse",[167,622,623],{},[63,624,626],{"href":625},"\u002Fglossary\u002Freverse-air-baghouse","Reverse-air baghouse",[167,628,629],{},[63,630,632],{"href":631},"\u002Fglossary\u002Fshaker-baghouse","Shaker baghouse",[167,634,635],{},[63,636,638],{"href":637},"\u002Fglossary\u002Fcompartment-isolation","Compartment isolation",[167,640,641],{},[63,642,505],{"href":309},{"title":190,"searchDepth":191,"depth":191,"links":644},[645,646,647],{"id":569,"depth":191,"text":570},{"id":585,"depth":191,"text":586},{"id":161,"depth":191,"text":162},"A baghouse is the structural enclosure that houses the bags, cages, cleaning system, tubesheet, plenums and hoppers of a fabric-filter dust collector. The word is used in both broad (\"the plant has a 12-compartment baghouse\") and narrow (\"a baghouse is the housing, the fabric filter is the system\") senses; in everyday industry practice the two terms overlap.",{},[565,651,652,653,654,522],"pulse-jet-baghouse","reverse-air-baghouse","shaker-baghouse","compartment-isolation",{"title":656,"description":657},"Baghouse — vessel that houses fabric-filter bags for industrial dust control","A baghouse is the structural enclosure that holds the bags, cages, tubesheet, cleaning system and hoppers of a fabric-filter dust collector. Sized in compartments for online isolation.",[659],{"title":660,"url":661},"Wikipedia — Baghouse","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaghouse","glossary\u002Fbaghouse","TraeRQp5lNGOrkFkwjsoYRrhIIRrMkFonwryXyc1wGw",{"id":665,"title":188,"aliases":666,"body":670,"category":195,"description":845,"extension":197,"meta":846,"navigation":199,"path":187,"relatedTerms":847,"seo":850,"sources":853,"stem":855,"term":188,"__hash__":856},"glossary\u002Fglossary\u002Fcollection-efficiency.md",[667,668,669],"collection efficiency","capture efficiency","ESP collection efficiency",{"type":53,"value":671,"toc":840},[672,686,690,767,771,774,812,817,819],[56,673,674,676,677,556,679,556,681,685],{},[59,675,188],{}," is the fraction of inlet particulate captured by an ",[63,678,66],{"href":65},[63,680,71],{"href":70},[63,682,684],{"href":683},"\u002Fglossary\u002Fcyclone-separator","cyclone"," or other particulate-control device. It is calculated as (inlet mass loading − outlet mass loading) \u002F inlet mass loading and reported as a percentage.",[79,687,689],{"id":688},"typical-values","Typical values",[84,691,692,702],{},[87,693,694],{},[90,695,696,699],{},[93,697,698],{},"Device",[93,700,701],{},"Typical collection efficiency",[100,703,704,715,726,737,747,756],{},[90,705,706,712],{},[105,707,708,709],{},"Single ",[63,710,711],{"href":683},"cyclone separator",[105,713,714],{},"70–90%",[90,716,717,723],{},[105,718,719],{},[63,720,722],{"href":721},"\u002Fglossary\u002Fmulti-cyclone-multiclone","Multi-cyclone",[105,724,725],{},"85–95%",[90,727,728,734],{},[105,729,730],{},[63,731,733],{"href":732},"\u002Fglossary\u002Fventuri-scrubber","Venturi scrubber",[105,735,736],{},"95–99%",[90,738,739,744],{},[105,740,741,743],{},[63,742,177],{"href":65}," (modern)",[105,745,746],{},"99.5–99.95%",[90,748,749,753],{},[105,750,751],{},[63,752,182],{"href":70},[105,754,755],{},"99.9–99.99%",[90,757,758,764],{},[105,759,760],{},[63,761,763],{"href":762},"\u002Fglossary\u002Fwet-esp","Wet ESP (WESP)",[105,765,766],{},"99.9% (especially fine PM)",[79,768,770],{"id":769},"how-fouling-erodes-collection-efficiency","How fouling erodes collection efficiency",[56,772,773],{},"Each device fouls in characteristic ways that degrade its collection efficiency:",[164,775,776,790,801],{},[167,777,778,780,781,556,783,556,786],{},[59,779,66],{}," — ",[63,782,430],{"href":429},[63,784,785],{"href":499},"hopper bridging",[63,787,789],{"href":788},"\u002Fglossary\u002Fre-entrainment","re-entrainment",[167,791,792,780,794,556,796,800],{},[59,793,182],{},[63,795,315],{"href":314},[63,797,799],{"href":798},"\u002Fglossary\u002Fcake-bridging-cake-blinding","cake bridging",", bag failures",[167,802,803,806,807,811],{},[59,804,805],{},"Cyclone"," — wall build-up, ",[63,808,810],{"href":809},"\u002Fglossary\u002Fcyclone-dipleg","dipleg"," pluggage",[56,813,814,816],{},[63,815,310],{"href":309}," address the first three mechanisms in their respective applications.",[79,818,162],{"id":161},[164,820,821,825,829,835],{},[167,822,823],{},[63,824,177],{"href":65},[167,826,827],{},[63,828,182],{"href":70},[167,830,831],{},[63,832,834],{"href":833},"\u002Fglossary\u002Fremoval-efficiency","Removal efficiency",[167,836,837],{},[63,838,839],{"href":75},"Specific collection area (SCA)",{"title":190,"searchDepth":191,"depth":191,"links":841},[842,843,844],{"id":688,"depth":191,"text":689},{"id":769,"depth":191,"text":770},{"id":161,"depth":191,"text":162},"Collection efficiency is the fraction of inlet particulate captured by an ESP, baghouse, cyclone or other particulate-control device. It is calculated as (inlet mass loading − outlet mass loading) \u002F inlet mass loading and reported as a percentage.",{},[203,71,848,849],"removal-efficiency","specific-collection-area",{"title":851,"description":852},"Collection efficiency — fraction of inlet particulate captured by the cleaning device","Collection efficiency is the fraction of inlet particulate captured by an ESP, baghouse or cyclone. Reported as a percentage; modern ESPs achieve 99.5%+, baghouses 99.9%+.",[854],{"title":531,"url":532},"glossary\u002Fcollection-efficiency","_cGtM6lyYxWcd21mZNA6in_t4XcwLZgPZBCgilBKMek",1782613745533]