[{"data":1,"prerenderedAt":903},["ShallowReactive",2],{"site-footer-common":3,"glossary:high-dust-low-dust-tail-end-scr":45,"glossary-related:high-dust-low-dust-tail-end-scr":259},{"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":53,"category":238,"description":239,"extension":240,"meta":241,"navigation":242,"path":243,"relatedTerms":244,"seo":249,"sources":252,"stem":256,"term":257,"__hash__":258},"glossary\u002Fglossary\u002Fhigh-dust-low-dust-tail-end-scr.md","High-dust \u002F low-dust \u002F tail-end SCR",[49,50,51,52],"HD SCR","LD SCR","tail-end SCR","high dust SCR",{"type":54,"value":55,"toc":231},"minimark",[56,78,156,161,189,193,201,205],[57,58,59,63,64,67,68,71,72,77],"p",{},[60,61,62],"strong",{},"High-dust",", ",[60,65,66],{},"low-dust"," and ",[60,69,70],{},"tail-end"," describe where an ",[73,74,76],"a",{"href":75},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalyst"," sits in the flue-gas path relative to upstream particulate-control equipment.",[79,80,81,100],"table",{},[82,83,84],"thead",{},[85,86,87,91,94,97],"tr",{},[88,89,90],"th",{},"Configuration",[88,92,93],{},"Position",[88,95,96],{},"Gas temperature",[88,98,99],{},"Trade-off",[101,102,103,125,140],"tbody",{},[85,104,105,111,119,122],{},[106,107,108],"td",{},[60,109,110],{},"High-dust (HD-SCR)",[106,112,113,114,118],{},"Upstream of ",[73,115,117],{"href":116},"\u002Fglossary\u002Felectrostatic-precipitator","ESP"," \u002F baghouse",[106,120,121],{},"300–400 °C",[106,123,124],{},"Natural operating temperature; high catalyst pluggage and erosion",[85,126,127,132,135,137],{},[106,128,129],{},[60,130,131],{},"Low-dust (LD-SCR)",[106,133,134],{},"Between hot-side ESP and air heater",[106,136,121],{},[106,138,139],{},"Cleaner gas; needs hot-side ESP upstream",[85,141,142,147,150,153],{},[106,143,144],{},[60,145,146],{},"Tail-end (TE-SCR)",[106,148,149],{},"Downstream of all particulate control",[106,151,152],{},"130–200 °C",[106,154,155],{},"Cleanest gas; requires gas reheating; ABS risk",[157,158,160],"h2",{"id":159},"why-high-dust-dominates","Why high-dust dominates",[57,162,163,164,168,169,173,174,178,179,183,184,188],{},"Most coal-fired utility SCRs are high-dust because no flue-gas reheating is required and SCR slots cleanly between the ",[73,165,167],{"href":166},"\u002Fglossary\u002Feconomiser","economiser"," outlet and the ",[73,170,172],{"href":171},"\u002Fglossary\u002Fair-heater","air heater"," inlet at the natural process temperature. The penalty is high fly-ash loading at the catalyst inlet — hence the need for ",[73,175,177],{"href":176},"\u002Fglossary\u002Flarge-particle-ash","LPA screens",", guard layers and active cleaning (",[73,180,182],{"href":181},"\u002Fglossary\u002Fsonic-horn","sonic horns"," plus ",[73,185,187],{"href":186},"\u002Fglossary\u002Fsonic-sootblower","sootblowers",").",[157,190,192],{"id":191},"tail-end-scr-niche","Tail-end SCR niche",[57,194,195,196,200],{},"Tail-end SCRs are favoured where dust loading would otherwise destroy the catalyst (some ",[73,197,199],{"href":198},"\u002Fglossary\u002Fwaste-to-energy","WtE"," plants), where retrofitting onto an existing layout leaves no upstream space, or where catalyst poisons (arsenic, alkali) must be filtered out first. The reheating energy penalty is significant.",[157,202,204],{"id":203},"related-terms","Related terms",[206,207,208,214,220,226],"ul",{},[209,210,211],"li",{},[73,212,213],{"href":75},"Selective Catalytic Reduction (SCR)",[209,215,216],{},[73,217,219],{"href":218},"\u002Fglossary\u002Fcatalyst-pluggage","Catalyst pluggage",[209,221,222],{},[73,223,225],{"href":224},"\u002Fglossary\u002Fammonium-bisulphate","Ammonium bisulphate",[209,227,228],{},[73,229,230],{"href":116},"Electrostatic precipitator",{"title":232,"searchDepth":233,"depth":233,"links":234},"",2,[235,236,237],{"id":159,"depth":233,"text":160},{"id":191,"depth":233,"text":192},{"id":203,"depth":233,"text":204},"scr-sncr","High-dust, low-dust and tail-end describe where an SCR catalyst sits in the flue-gas path relative to upstream particulate-control equipment.","md",{},true,"\u002Fglossary\u002Fhigh-dust-low-dust-tail-end-scr",[245,246,247,248],"selective-catalytic-reduction","catalyst-pluggage","ammonium-bisulphate","electrostatic-precipitator",{"title":250,"description":251},"High-dust, low-dust and tail-end SCR — where the SCR sits in the gas path","High-dust SCR sits upstream of ESP\u002Fbaghouse at 300–400 °C. Low-dust sits between ESP and air heater. Tail-end SCR sits downstream of all particulate control at lower temperature.",[253],{"title":254,"url":255},"Power Engineering — Applying SCR NOx Reduction in High-Dust Environments","https:\u002F\u002Fwww.powerengineeringint.com\u002Fcoal-fired\u002Fapplying-scr-nox-reduction-in-high-dust-environments\u002F","glossary\u002Fhigh-dust-low-dust-tail-end-scr","High-dust, low-dust and tail-end SCR","Qy7U8_A9-ck_Ayfw2C3rnfFmFkSIBZHyZ_5QyGMIkLA",[260,420,567,726],{"id":261,"title":213,"aliases":262,"body":266,"category":238,"description":397,"extension":240,"meta":398,"navigation":242,"path":75,"relatedTerms":399,"seo":407,"sources":410,"stem":417,"term":418,"__hash__":419},"glossary\u002Fglossary\u002Fselective-catalytic-reduction.md",[263,264,265],"SCR","SCR system","SCR reactor",{"type":54,"value":267,"toc":392},[268,285,289,304,308,311,338,352,354],[57,269,270,272,273,277,278,67,281,284],{},[60,271,213],{}," is the dominant flue-gas NOx-control technology on coal-fired and gas-fired utility boilers, ",[73,274,276],{"href":275},"\u002Fglossary\u002Fheat-recovery-steam-generator","HRSGs"," in combined-cycle plants, ",[73,279,280],{"href":198},"waste-to-energy",[73,282,283],{"href":198},"biomass"," boilers, cement plants and major refining furnaces. Ammonia or aqueous urea is injected upstream of a catalyst bed; the catalyst lowers the activation energy for the reaction NOx + NH₃ → N₂ + H₂O, achieving 80–95% NOx reduction across the reactor.",[157,286,288],{"id":287},"reactor-layout","Reactor layout",[57,290,291,292,296,297,300,301,303],{},"A typical SCR reactor is a vertical or horizontal duct containing 2–4 layers of catalyst modules. Upstream of the catalyst sits the ",[73,293,295],{"href":294},"\u002Fglossary\u002Fammonia-injection-grid","ammonia injection grid (AIG)"," that distributes the ammonia evenly into the flue gas. Most installations operate in the ",[60,298,299],{},"high-dust"," position (between economiser and air heater) where catalyst temperature is around 300–400 °C; ",[60,302,70],{}," SCRs sit downstream of particulate control at lower temperatures, with the trade-off of needing flue-gas reheating.",[157,305,307],{"id":306},"fouling-and-cleaning","Fouling and cleaning",[57,309,310],{},"SCR catalysts foul in two ways:",[206,312,313,329],{},[209,314,315,320,321,67,325,328],{},[60,316,317],{},[73,318,319],{"href":218},"Pluggage"," — fly ash, ",[73,322,324],{"href":323},"\u002Fglossary\u002Fpopcorn-ash","popcorn ash",[73,326,327],{"href":176},"large-particle ash"," wedge into the catalyst cells, blocking the gas path",[209,330,331,337],{},[60,332,333],{},[73,334,336],{"href":335},"\u002Fglossary\u002Fcatalyst-masking","Masking"," — a thin layer of deposit covers the active sites; gas flow continues but catalytic activity falls",[57,339,340,341,345,346,63,349,351],{},"Both reduce NOx-reduction efficiency, raise ",[73,342,344],{"href":343},"\u002Fglossary\u002Fammonia-slip","ammonia slip",", and shorten catalyst life. Cleaning options include steam ",[73,347,187],{"href":348},"\u002Fglossary\u002Fsteam-sootblower",[73,350,182],{"href":181}," and offline campaigns (vacuum \u002F water wash \u002F regeneration). Sonic horns are increasingly favoured because they continuously dislodge ash before it cements onto the catalyst face, without the steam erosion of mechanical sootblowing.",[157,353,204],{"id":203},[206,355,356,362,367,372,377,381,387],{},[209,357,358],{},[73,359,361],{"href":360},"\u002Fglossary\u002Fselective-non-catalytic-reduction","Selective Non-Catalytic Reduction (SNCR)",[209,363,364],{},[73,365,366],{"href":294},"Ammonia injection grid",[209,368,369],{},[73,370,371],{"href":343},"Ammonia slip",[209,373,374],{},[73,375,376],{"href":335},"Catalyst masking",[209,378,379],{},[73,380,219],{"href":218},[209,382,383],{},[73,384,386],{"href":385},"\u002Fglossary\u002Fhoneycomb-catalyst","Honeycomb catalyst",[209,388,389],{},[73,390,391],{"href":181},"Sonic horn",{"title":232,"searchDepth":233,"depth":233,"links":393},[394,395,396],{"id":287,"depth":233,"text":288},{"id":306,"depth":233,"text":307},{"id":203,"depth":233,"text":204},"Selective Catalytic Reduction (SCR) is the dominant flue-gas NOx-control technology on coal-fired and gas-fired utility boilers, HRSGs in combined-cycle plants, waste-to-energy and biomass boilers, cement plants and major refining furnaces. Ammonia or aqueous urea is injected upstream of a catalyst bed; the catalyst lowers the activation energy for the reaction NOx + NH₃ → N₂ + H₂O, achieving 80–95% NOx reduction across the reactor.",{},[400,401,402,403,404,246,405,406],"selective-non-catalytic-reduction","denox","ammonia-injection-grid","ammonia-slip","catalyst-masking","honeycomb-catalyst","sonic-horn",{"title":408,"description":409},"Selective Catalytic Reduction (SCR) — how the dominant NOx-control technology works","SCR is the dominant NOx-control technology on industrial combustion plant. Ammonia is injected upstream of a catalyst that converts NOx to nitrogen and water.",[411,414],{"title":412,"url":413},"Wikipedia — Selective catalytic reduction","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSelective_catalytic_reduction",{"title":415,"url":416},"Power Engineering — SCR Catalyst Cleaning: Sootblowers vs. Acoustic Horns","https:\u002F\u002Fwww.power-eng.com\u002Foperations-maintenance\u002Fscr-catalyst-cleaningsootblowers-vs-acoustic-horns\u002F","glossary\u002Fselective-catalytic-reduction","Selective Catalytic Reduction","fmMCMd4NY3eZdSk_UYlbZ9ryi-9CR2Os6DivQjXEPCU",{"id":421,"title":219,"aliases":422,"body":426,"category":238,"description":553,"extension":240,"meta":554,"navigation":242,"path":218,"relatedTerms":555,"seo":558,"sources":561,"stem":565,"term":219,"__hash__":566},"glossary\u002Fglossary\u002Fcatalyst-pluggage.md",[423,424,425],"catalyst plugging","catalyst channelling","SCR catalyst pluggage",{"type":54,"value":427,"toc":548},[428,440,444,478,482,519,521],[57,429,430,432,433,435,436,439],{},[60,431,219],{}," is the physical blockage of ",[73,434,76],{"href":75}," channels by particulate material. Unlike ",[73,437,438],{"href":335},"catalyst masking"," (a thin surface blanket), pluggage fills the catalyst channels themselves, stopping gas flow through affected cells. The result is ΔP rise across the SCR, gas-flow maldistribution into the remaining open cells, and channelling effects that reduce overall NOx reduction.",[157,441,443],{"id":442},"sources-of-pluggage-material","Sources of pluggage material",[206,445,446,454,462,472],{},[209,447,448,453],{},[60,449,450],{},[73,451,452],{"href":176},"Large-particle ash (LPA)"," — slag fragments and agglomerated ash carried over from the boiler",[209,455,456,461],{},[60,457,458],{},[73,459,460],{"href":323},"Popcorn ash"," — porous low-density ash particles that wedge into honeycomb cells",[209,463,464,467,468,471],{},[60,465,466],{},"Ammonium-salt deposits"," — ",[73,469,470],{"href":224},"ammonium bisulphate"," on tail-end SCRs at lower temperatures",[209,473,474,477],{},[60,475,476],{},"Refractory debris"," — fragments from upstream furnace or duct repairs",[157,479,481],{"id":480},"prevention","Prevention",[206,483,484,489,495,501,510],{},[209,485,486,488],{},[60,487,177],{}," — coarse mesh screens upstream of the catalyst trap large particles",[209,490,491,494],{},[60,492,493],{},"Guard layers"," — sacrificial top catalyst layer with larger pitch absorbs the initial particulate",[209,496,497,500],{},[60,498,499],{},"Larger pitch on the top layer"," — wider cell openings on the first catalyst layer pass LPA through to a removable screen below",[209,502,503,509],{},[60,504,505,506,508],{},"Periodic ",[73,507,406],{"href":181}," cleaning"," — dislodges accumulating ash before it cements",[209,511,512,518],{},[60,513,514,515],{},"Steam ",[73,516,517],{"href":186},"sootblowing"," — for harder deposits",[157,520,204],{"id":203},[206,522,523,527,532,536,540,544],{},[209,524,525],{},[73,526,213],{"href":75},[209,528,529],{},[73,530,531],{"href":176},"Large-particle ash",[209,533,534],{},[73,535,460],{"href":323},[209,537,538],{},[73,539,376],{"href":335},[209,541,542],{},[73,543,386],{"href":385},[209,545,546],{},[73,547,391],{"href":181},{"title":232,"searchDepth":233,"depth":233,"links":549},[550,551,552],{"id":442,"depth":233,"text":443},{"id":480,"depth":233,"text":481},{"id":203,"depth":233,"text":204},"Catalyst pluggage is the physical blockage of SCR catalyst channels by particulate material. Unlike catalyst masking (a thin surface blanket), pluggage fills the catalyst channels themselves, stopping gas flow through affected cells. The result is ΔP rise across the SCR, gas-flow maldistribution into the remaining open cells, and channelling effects that reduce overall NOx reduction.",{},[245,556,557,404,405,406],"large-particle-ash","popcorn-ash",{"title":559,"description":560},"Catalyst pluggage — channel blockage that reduces SCR gas flow","Catalyst pluggage is the physical blockage of SCR catalyst channels by large-particle ash, popcorn ash or ammonium-salt deposits. It causes ΔP rise and gas-flow maldistribution.",[562],{"title":563,"url":564},"Airflow Sciences — SCR Catalyst Pluggage Reduction at Roxboro Unit 3","https:\u002F\u002Fwww.airflowsciences.com\u002Fsites\u002Fdefault\u002Ffiles\u002Fdocs\u002F2010_MEGA_Symposium_Roxboro_U3.pdf","glossary\u002Fcatalyst-pluggage","m2viiLe19KKcTBiDWhyUc38xPIzoOiMpL15r0i_ayHg",{"id":568,"title":569,"aliases":570,"body":575,"category":238,"description":712,"extension":240,"meta":713,"navigation":242,"path":224,"relatedTerms":714,"seo":717,"sources":720,"stem":724,"term":225,"__hash__":725},"glossary\u002Fglossary\u002Fammonium-bisulphate.md","Ammonium bisulphate (ABS)",[571,572,573,574],"ABS","ammonium bisulfate","ammonium sulphate","NH4HSO4",{"type":54,"value":576,"toc":707},[577,597,601,604,640,644,681,683],[57,578,579,582,583,586,587,590,591,593,594,596],{},[60,580,581],{},"Ammonium bisulphate (NH₄HSO₄, ABS)"," — sometimes written ",[584,585,572],"em",{}," in US technical literature — is a sticky, low-melting deposit formed when ",[73,588,589],{"href":343},"slipped ammonia"," reacts with SO₃ in cooling flue gas. ABS condenses between roughly 150 °C and 250 °C, coating the cold end of any ",[73,592,172],{"href":171}," downstream of an ",[73,595,263],{"href":75},".",[157,598,600],{"id":599},"why-abs-is-the-most-feared-cold-end-deposit","Why ABS is the most-feared cold-end deposit",[57,602,603],{},"ABS is uniquely problematic because it is:",[206,605,606,612,622,628,634],{},[209,607,608,611],{},[60,609,610],{},"Sticky"," — bonds tenaciously to air-heater baskets and economiser tubes",[209,613,614,617,618],{},[60,615,616],{},"Hygroscopic"," — picks up moisture and accelerates ",[73,619,621],{"href":620},"\u002Fglossary\u002Fcold-end-corrosion-dew-point-corrosion","cold-end corrosion",[209,623,624,627],{},[60,625,626],{},"Hard to remove"," — resists steam sootblowing once consolidated",[209,629,630,633],{},[60,631,632],{},"Self-reinforcing"," — coated surfaces trap more ash, accelerating fouling",[209,635,636,639],{},[60,637,638],{},"Concentrated in a narrow temperature band"," — predictably plugs the same air-heater rows",[157,641,643],{"id":642},"mitigation","Mitigation",[206,645,646,654,660,666,675],{},[209,647,648,653],{},[60,649,650,651],{},"Minimise ",[73,652,344],{"href":343}," at the SCR (the single biggest lever)",[209,655,656,659],{},[60,657,658],{},"Manage SO₃ formation"," — fuel sulphur control, catalyst formulation",[209,661,662,665],{},[60,663,664],{},"Avoid the dew-point window"," — keep cold-end gas temperature above the formation band",[209,667,668,674],{},[60,669,670,673],{},[73,671,672],{"href":181},"Sonic horns"," on the cold end"," — continuous cleaning prevents ABS from consolidating before periodic water-washing",[209,676,677,680],{},[60,678,679],{},"Water-washing campaigns"," — periodic offline washes restore air-heater performance",[157,682,204],{"id":203},[206,684,685,689,693,698,703],{},[209,686,687],{},[73,688,371],{"href":343},[209,690,691],{},[73,692,213],{"href":75},[209,694,695],{},[73,696,697],{"href":171},"Air heater",[209,699,700],{},[73,701,702],{"href":620},"Cold-end corrosion \u002F dew-point corrosion",[209,704,705],{},[73,706,391],{"href":181},{"title":232,"searchDepth":233,"depth":233,"links":708},[709,710,711],{"id":599,"depth":233,"text":600},{"id":642,"depth":233,"text":643},{"id":203,"depth":233,"text":204},"Ammonium bisulphate (NH₄HSO₄, ABS) — sometimes written ammonium bisulfate in US technical literature — is a sticky, low-melting deposit formed when slipped ammonia reacts with SO₃ in cooling flue gas. ABS condenses between roughly 150 °C and 250 °C, coating the cold end of any air heater downstream of an SCR.",{},[403,245,715,716,406],"air-heater","cold-end-corrosion-dew-point-corrosion",{"title":718,"description":719},"Ammonium bisulphate (ABS) — sticky deposit from SCR slip plus SO3","Ammonium bisulphate is a sticky low-melting deposit formed when slipped ammonia reacts with SO3 in cooling flue gas. The dominant cold-end fouling species on SCR-equipped boilers.",[721],{"title":722,"url":723},"POWER Magazine — SO3's impacts on plant O&M","https:\u002F\u002Fwww.powermag.com\u002Fso3s-impacts-on-plant-om-part-ii\u002F","glossary\u002Fammonium-bisulphate","eVfkw0arMYLXvUn7Eb2ZquRKgct13PXCySe8Iclt3GY",{"id":727,"title":728,"aliases":729,"body":732,"category":878,"description":879,"extension":240,"meta":880,"navigation":242,"path":116,"relatedTerms":881,"seo":888,"sources":891,"stem":901,"term":230,"__hash__":902},"glossary\u002Fglossary\u002Felectrostatic-precipitator.md","Electrostatic precipitator (ESP)",[117,730,731],"electrostatic precipitators","dry ESP",{"type":54,"value":733,"toc":872},[734,747,751,769,773,808,812,844,846],[57,735,736,737,740,741,743,744,746],{},"An ",[60,738,739],{},"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, ",[73,742,280],{"href":198}," plants, ",[73,745,283],{"href":198}," plants, sinter strands and many other heavy-industry off-gas streams.",[157,748,750],{"id":749},"how-an-esp-works","How an ESP works",[57,752,753,754,758,759,763,764,768],{},"Flue gas flows horizontally between a parallel array of vertical ",[73,755,757],{"href":756},"\u002Fglossary\u002Fcollecting-electrode","collecting electrodes"," (plates) and ",[73,760,762],{"href":761},"\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 ",[73,765,767],{"href":766},"\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.",[157,770,772],{"id":771},"where-sonic-horns-fit","Where sonic horns fit",[57,774,775,776,780,781,783,784,788,789,793,794,798,799,803,804,596],{},"ESPs accumulate dust faster than mechanical rapping can release it, and hoppers below ESP fields routinely ",[73,777,779],{"href":778},"\u002Fglossary\u002Fbridging","bridge"," and choke. ",[73,782,672],{"href":181}," installed on the ESP ",[73,785,787],{"href":786},"\u002Fglossary\u002Fesp-penthouse","penthouse"," and on hopper walls keep dust dislodged, supplement ",[73,790,792],{"href":791},"\u002Fglossary\u002Fesp-rapper","rappers",", prevent ",[73,795,797],{"href":796},"\u002Fglossary\u002Fback-corona","back-corona"," by limiting plate dust thickness, and eliminate hopper ",[73,800,802],{"href":801},"\u002Fglossary\u002Frat-holing","rat-holing"," without the structural fatigue of ",[73,805,807],{"href":806},"\u002Fglossary\u002Ftumbling-hammer-rapper","tumbling-hammer rappers",[157,809,811],{"id":810},"common-failure-modes","Common failure modes",[206,813,814,820,826,832,838],{},[209,815,816,819],{},[60,817,818],{},"High opacity \u002F particulate emissions"," from thick dust layers reducing collection efficiency",[209,821,822,825],{},[60,823,824],{},"Back-corona"," in high-resistivity ash that reverses ionisation and collapses collection",[209,827,828,831],{},[60,829,830],{},"Re-entrainment"," as rapper puffs return dust to the gas stream",[209,833,834,837],{},[60,835,836],{},"Hopper bridging"," that stops ash extraction and triggers field shutdowns",[209,839,840,843],{},[60,841,842],{},"Discharge-electrode breakage"," from rapper fatigue or sparking",[157,845,204],{"id":203},[206,847,848,853,858,862,868],{},[209,849,850],{},[73,851,852],{"href":756},"Collecting electrode",[209,854,855],{},[73,856,857],{"href":761},"Discharge electrode",[209,859,860],{},[73,861,824],{"href":796},[209,863,864],{},[73,865,867],{"href":866},"\u002Fglossary\u002Fesp-hopper","ESP hopper",[209,869,870],{},[73,871,391],{"href":181},{"title":232,"searchDepth":233,"depth":233,"links":873},[874,875,876,877],{"id":749,"depth":233,"text":750},{"id":771,"depth":233,"text":772},{"id":810,"depth":233,"text":811},{"id":203,"depth":233,"text":204},"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.",{},[882,883,884,885,886,887,797,406],"wet-esp","collecting-electrode","discharge-electrode","corona-discharge","esp-hopper","esp-rapper",{"title":889,"description":890},"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.",[892,895,898],{"title":893,"url":894},"Wikipedia — Electrostatic precipitator","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FElectrostatic_precipitator",{"title":896,"url":897},"EPA — Monitoring Knowledge Base: Electrostatic Precipitators","https:\u002F\u002Fwww.epa.gov\u002Fair-emissions-monitoring-knowledge-base\u002Fmonitoring-control-technique-electrostatic-precipitators",{"title":899,"url":900},"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",1782613751226]