[{"data":1,"prerenderedAt":736},["ShallowReactive",2],{"site-footer-common":3,"glossary:clinker-cooler":45,"glossary-related:clinker-cooler":184},{"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":51,"category":165,"description":166,"extension":167,"meta":168,"navigation":169,"path":170,"relatedTerms":171,"seo":175,"sources":178,"stem":182,"term":47,"__hash__":183},"glossary\u002Fglossary\u002Fclinker-cooler.md","Clinker cooler",[49,50],"grate cooler","cement cooler",{"type":52,"value":53,"toc":158},"minimark",[54,87,92,99,121,125,132,136],[55,56,57,58,62,63,65,66,71,72,76,77,81,82,86],"p",{},"A ",[59,60,61],"strong",{},"clinker cooler"," (most commonly a ",[59,64,49],{},") quenches hot ",[67,68,70],"a",{"href":69},"\u002Fglossary\u002Fclinker","clinker"," discharged from the ",[67,73,75],{"href":74},"\u002Fglossary\u002Frotary-kiln","rotary kiln"," at ~1,400 °C down to ~100 °C using forced ambient air blown upward through a perforated grate. Hot air recovered from the cooler is used as secondary combustion air at the main kiln burner and as tertiary air at the ",[67,78,80],{"href":79},"\u002Fglossary\u002Fcalciner","calciner"," via the ",[67,83,85],{"href":84},"\u002Fglossary\u002Ftertiary-air-duct","tertiary air duct (TAD)",".",[88,89,91],"h2",{"id":90},"cooler-related-fouling","Cooler-related fouling",[55,93,94,95,98],{},"The cooler itself rarely fouls but generates substantial fines that drop out into hoppers below and along the ",[67,96,97],{"href":84},"TAD",":",[100,101,102,109,115],"ul",{},[103,104,105,108],"li",{},[59,106,107],{},"Cooler dust hopper bridging"," — hopper outlets clog with fine clinker dust",[103,110,111,114],{},[59,112,113],{},"Pulse-jet filter pluggage"," on cooler vent baghouses",[103,116,117,120],{},[59,118,119],{},"TAD bottom dropout"," along the air route to the calciner",[88,122,124],{"id":123},"sonic-horn-duty","Sonic-horn duty",[55,126,127,131],{},[67,128,130],{"href":129},"\u002Fglossary\u002Fsonic-horn","Sonic horns"," installed on the cooler dust hoppers prevent bridging and maintain dust extraction. The horns must tolerate the high-temperature environment immediately below the kiln-discharge zone; stainless-steel construction is standard.",[88,133,135],{"id":134},"related-terms","Related terms",[100,137,138,143,148,153],{},[103,139,140],{},[67,141,142],{"href":69},"Clinker",[103,144,145],{},[67,146,147],{"href":74},"Rotary kiln",[103,149,150],{},[67,151,152],{"href":84},"Tertiary air duct (TAD)",[103,154,155],{},[67,156,157],{"href":129},"Sonic horn",{"title":159,"searchDepth":160,"depth":160,"links":161},"",2,[162,163,164],{"id":90,"depth":160,"text":91},{"id":123,"depth":160,"text":124},{"id":134,"depth":160,"text":135},"cement","A clinker cooler (most commonly a grate cooler) quenches hot clinker discharged from the rotary kiln at ~1,400 °C down to ~100 °C using forced ambient air blown upward through a perforated grate. Hot air recovered from the cooler is used as secondary combustion air at the main kiln burner and as tertiary air at the calciner via the tertiary air duct (TAD).","md",{},true,"\u002Fglossary\u002Fclinker-cooler",[70,172,173,174],"rotary-kiln","tertiary-air-duct","sonic-horn",{"title":176,"description":177},"Clinker cooler — quench cooler at the rotary kiln discharge","A clinker cooler quenches hot clinker discharged from the rotary kiln using forced ambient air. Hot air recovered is sent to the calciner via the TAD; cooler dust hoppers benefit from sonic horns.",[179],{"title":180,"url":181},"Wikipedia — Cement kiln","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCement_kiln","glossary\u002Fclinker-cooler","QXNM4UlwGH82bX8us1X5_raAfNpFEkzmyhE_Rx9WnQs",[185,262,395,495],{"id":186,"title":142,"aliases":187,"body":190,"category":165,"description":248,"extension":167,"meta":249,"navigation":169,"path":69,"relatedTerms":250,"seo":253,"sources":256,"stem":260,"term":142,"__hash__":261},"glossary\u002Fglossary\u002Fclinker.md",[188,189],"cement clinker","clinker nodules",{"type":52,"value":191,"toc":244},[192,203,207,210,226,228],[55,193,194,196,197,199,200,202],{},[59,195,142],{}," is the dark, hard nodular intermediate product of cement manufacture. Raw meal — a mixture of limestone, clay, sand and iron — is burned at material temperatures of ~1,450 °C in the ",[67,198,75],{"href":74}," to drive the sequence of reactions that form the calcium-silicate minerals (alite, belite) that give cement its hydraulic properties. The resulting nodules — typically 3–25 mm in size — are then cooled in the ",[67,201,61],{"href":170}," and ground with gypsum to produce finished cement powder.",[88,204,206],{"id":205},"why-clinker-matters-operationally","Why clinker matters operationally",[55,208,209],{},"Clinker is the value-bearing intermediate in cement manufacture. Lost clinker production from an unplanned kiln stop directly maps to lost revenue: a 5,000 t\u002Fday kiln stopped for 24 hours destroys ~5,000 t of clinker output, equivalent to ~$300,000 in selling-price-equivalent product.",[55,211,212,213,215,216,220,221,225],{},"Every operational improvement that protects kiln availability — including ",[67,214,174],{"href":129}," installation on the ",[67,217,219],{"href":218},"\u002Fglossary\u002Fpreheater-tower","preheater tower"," and ",[67,222,224],{"href":223},"\u002Fglossary\u002Fkiln-inlet-riser-duct","kiln inlet"," — defends clinker output. This is the underlying economic logic for acoustic cleaning in the cement industry.",[88,227,135],{"id":134},[100,229,230,234,238],{},[103,231,232],{},[67,233,147],{"href":74},[103,235,236],{},[67,237,47],{"href":170},[103,239,240],{},[67,241,243],{"href":242},"\u002Fglossary\u002Fraw-mill-cement-mill-coal-mill","Raw mill \u002F cement mill \u002F coal mill",{"title":159,"searchDepth":160,"depth":160,"links":245},[246,247],{"id":205,"depth":160,"text":206},{"id":134,"depth":160,"text":135},"Clinker is the dark, hard nodular intermediate product of cement manufacture. Raw meal — a mixture of limestone, clay, sand and iron — is burned at material temperatures of ~1,450 °C in the rotary kiln to drive the sequence of reactions that form the calcium-silicate minerals (alite, belite) that give cement its hydraulic properties. The resulting nodules — typically 3–25 mm in size — are then cooled in the clinker cooler and ground with gypsum to produce finished cement powder.",{},[172,251,252],"clinker-cooler","raw-mill-cement-mill-coal-mill",{"title":254,"description":255},"Clinker — the intermediate product of cement manufacture","Clinker is the dark, hard nodular intermediate product of cement manufacture, formed by burning raw meal at 1,450 °C in the rotary kiln before grinding to cement powder.",[257],{"title":258,"url":259},"Wikipedia — Cement clinker","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCement_clinker","glossary\u002Fclinker","vLdWVe6SN8tpgSfToU5mXX1uao0_LXdP9UfQi_knTLg",{"id":263,"title":147,"aliases":264,"body":267,"category":165,"description":382,"extension":167,"meta":383,"navigation":169,"path":74,"relatedTerms":384,"seo":388,"sources":391,"stem":393,"term":147,"__hash__":394},"glossary\u002Fglossary\u002Frotary-kiln.md",[265,266],"cement kiln","rotary cement kiln",{"type":52,"value":268,"toc":376},[269,277,281,292,296,299,303,306,343,348,350],[55,270,57,271,273,274,276],{},[59,272,75],{}," is a long (typically 50–100 m), large-diameter (typically 4–6 m), gently inclined rotating steel cylinder lined with refractory brick where preheated raw meal is burned at flame temperatures of ~2,000 °C and material temperatures of ~1,450 °C to form ",[67,275,70],{"href":69},". The rotary kiln is the heart of every cement plant.",[88,278,280],{"id":279},"layout","Layout",[55,282,283,284,220,286,288,289,291],{},"The kiln is fed at its upper end by raw meal pre-calcined in the ",[67,285,219],{"href":218},[67,287,80],{"href":79},". The main burner fires at the lower (clinker discharge) end, opposing the gas flow direction. Discharged clinker falls into the ",[67,290,61],{"href":170}," below.",[88,293,295],{"id":294},"why-kiln-stops-are-catastrophic","Why kiln stops are catastrophic",[55,297,298],{},"A cement kiln is designed for continuous operation. Stopping and restarting the kiln means cooling and re-heating massive refractory mass, which damages the lining and incurs substantial fuel cost. A typical unplanned kiln stop loses 24–72 hours of clinker production, equivalent to thousands of tonnes of lost output.",[88,300,302],{"id":301},"what-stops-the-kiln","What stops the kiln",[55,304,305],{},"Most unplanned kiln stops trace to upstream or downstream problems rather than the kiln itself:",[100,307,308,316,325,331,337],{},[103,309,310,313,314],{},[59,311,312],{},"Preheater pluggage"," — see ",[67,315,219],{"href":218},[103,317,318,324],{},[59,319,320],{},[67,321,323],{"href":322},"\u002Fglossary\u002Fkiln-inlet-ring-snowman","Kiln-inlet ring \u002F snowman"," formation",[103,326,327,330],{},[59,328,329],{},"Clinker cooler upset"," — bridging in the cooler hopper",[103,332,333,336],{},[59,334,335],{},"Calciner pluggage"," — accreted build-up from AFR firing",[103,338,339,342],{},[59,340,341],{},"ID-fan trip"," — fouled blades causing vibration",[55,344,345,347],{},[67,346,130],{"href":129}," installed across the preheater, calciner and kiln-inlet area address several of these directly.",[88,349,135],{"id":134},[100,351,352,356,360,365,370],{},[103,353,354],{},[67,355,142],{"href":69},[103,357,358],{},[67,359,47],{"href":170},[103,361,362],{},[67,363,364],{"href":223},"Kiln inlet \u002F riser duct",[103,366,367],{},[67,368,369],{"href":218},"Preheater tower",[103,371,372],{},[67,373,375],{"href":374},"\u002Fglossary\u002Falternative-fuel","Alternative fuel",{"title":159,"searchDepth":160,"depth":160,"links":377},[378,379,380,381],{"id":279,"depth":160,"text":280},{"id":294,"depth":160,"text":295},{"id":301,"depth":160,"text":302},{"id":134,"depth":160,"text":135},"A rotary kiln is a long (typically 50–100 m), large-diameter (typically 4–6 m), gently inclined rotating steel cylinder lined with refractory brick where preheated raw meal is burned at flame temperatures of ~2,000 °C and material temperatures of ~1,450 °C to form clinker. The rotary kiln is the heart of every cement plant.",{},[70,251,385,386,387],"kiln-inlet-riser-duct","preheater-tower","alternative-fuel",{"title":389,"description":390},"Rotary kiln — the heart of the cement plant","A rotary kiln is a long inclined rotating cylinder where preheated raw meal is burned at 1,450 °C to form clinker. The heart of every cement plant.",[392],{"title":180,"url":181},"glossary\u002Frotary-kiln","MIYT9G3DCofPYVl4SqD8erG8mcl6gg4VWmUXfvLV0fc",{"id":396,"title":152,"aliases":397,"body":400,"category":165,"description":482,"extension":167,"meta":483,"navigation":169,"path":84,"relatedTerms":484,"seo":485,"sources":488,"stem":492,"term":493,"__hash__":494},"glossary\u002Fglossary\u002Ftertiary-air-duct.md",[97,398,399],"tertiary air","cement TAD",{"type":52,"value":401,"toc":477},[402,417,421,447,451,456,458],[55,403,404,405,407,408,410,411,413,414,416],{},"The ",[59,406,85],{}," routes hot combustion air from the ",[67,409,61],{"href":170}," to the ",[67,412,80],{"href":79}," firing zone, bypassing the ",[67,415,75],{"href":74},". The TAD is essential to separate-calciner designs because it provides the oxygen needed to burn calciner fuel without diverting kiln air.",[88,418,420],{"id":419},"operational-issues","Operational issues",[100,422,423,429,435,441],{},[103,424,425,428],{},[59,426,427],{},"Dust dropout"," — fine clinker dust carried over from the cooler settles along the TAD bottom and accumulates",[103,430,431,434],{},[59,432,433],{},"Localised build-up"," at bends and restrictions in the duct path",[103,436,437,440],{},[59,438,439],{},"Pluggage"," at the TAD-calciner inlet",[103,442,443,446],{},[59,444,445],{},"Refractory wear"," from impingement at duct bends",[88,448,450],{"id":449},"cleaning","Cleaning",[55,452,453,455],{},[67,454,130],{"href":129}," installed along the TAD prevent dust settlement and keep the air flow free of restrictions. Periodic pneumatic-gate discharge of accumulated dust from purpose-built TAD hoppers complements acoustic cleaning.",[88,457,135],{"id":134},[100,459,460,465,469,473],{},[103,461,462],{},[67,463,464],{"href":79},"Calciner",[103,466,467],{},[67,468,47],{"href":170},[103,470,471],{},[67,472,369],{"href":218},[103,474,475],{},[67,476,157],{"href":129},{"title":159,"searchDepth":160,"depth":160,"links":478},[479,480,481],{"id":419,"depth":160,"text":420},{"id":449,"depth":160,"text":450},{"id":134,"depth":160,"text":135},"The tertiary air duct (TAD) routes hot combustion air from the clinker cooler to the calciner firing zone, bypassing the rotary kiln. The TAD is essential to separate-calciner designs because it provides the oxygen needed to burn calciner fuel without diverting kiln air.",{},[80,251,386,174],{"title":486,"description":487},"Tertiary air duct (TAD) — combustion air route from clinker cooler to calciner","The tertiary air duct routes hot air from the clinker cooler to the calciner combustion zone, bypassing the kiln. Dust dropout in the TAD is a recurring operational issue.",[489],{"title":490,"url":491},"CemNet — Clinker dust in tertiary air duct","https:\u002F\u002Fwww.cemnet.com\u002FForum\u002Fthread\u002F107759\u002Fclinker-dust-in-tertiary-air-duct.html","glossary\u002Ftertiary-air-duct","Tertiary air duct","65fo4jNdus5BZoMPtuOGW0E3HXWP9mTBJ7ZRBSmtBVU",{"id":496,"title":157,"aliases":497,"body":501,"category":711,"description":712,"extension":167,"meta":713,"navigation":169,"path":129,"relatedTerms":714,"seo":721,"sources":724,"stem":734,"term":157,"__hash__":735},"glossary\u002Fglossary\u002Fsonic-horn.md",[498,499,500],"sonic horns","sonic cleaning horn","industrial sonic horn",{"type":52,"value":502,"toc":704},[503,535,539,547,551,619,623,660,664,672,674],[55,504,57,505,508,509,513,514,518,519,518,523,518,527,220,531,86],{},[59,506,507],{},"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 ",[67,510,512],{"href":511},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner"," and the default specification for cleaning ",[67,515,517],{"href":516},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs",", ",[67,520,522],{"href":521},"\u002Fglossary\u002Ffabric-filter","baghouses",[67,524,526],{"href":525},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[67,528,530],{"href":529},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces",[67,532,534],{"href":533},"\u002Fglossary\u002Fhopper","hoppers and silos",[88,536,538],{"id":537},"how-a-sonic-horn-works","How a sonic horn works",[55,540,541,542,546],{},"Compressed plant air admitted through a ",[67,543,545],{"href":544},"\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.",[88,548,550],{"id":549},"key-parameters","Key parameters",[552,553,554,567],"table",{},[555,556,557],"thead",{},[558,559,560,564],"tr",{},[561,562,563],"th",{},"Parameter",[561,565,566],{},"Typical range",[568,569,570,579,587,595,603,611],"tbody",{},[558,571,572,576],{},[573,574,575],"td",{},"Fundamental frequency",[573,577,578],{},"60–400 Hz",[558,580,581,584],{},[573,582,583],{},"Sound pressure level",[573,585,586],{},"140–180 dB",[558,588,589,592],{},[573,590,591],{},"Compressed-air consumption",[573,593,594],{},"8–14 Nm³\u002Fmin at 4–7 bar",[558,596,597,600],{},[573,598,599],{},"Operating temperature (with appropriate materials)",[573,601,602],{},"−40 °C to +500 °C",[558,604,605,608],{},[573,606,607],{},"Firing cycle",[573,609,610],{},"5–15 s burst, repeated every 3–15 minutes",[558,612,613,616],{},[573,614,615],{},"Mass",[573,617,618],{},"15–60 kg depending on horn size",[88,620,622],{"id":621},"frequency-selection","Frequency selection",[55,624,625,626,518,630,634,635,518,639,643,644,518,647,651,652,220,656,86],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[67,627,629],{"href":628},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[67,631,633],{"href":632},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[67,636,638],{"href":637},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[67,640,642],{"href":641},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[67,645,646],{"href":521},"fabric-filter compartments",[67,648,650],{"href":649},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[67,653,655],{"href":654},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[67,657,659],{"href":658},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[88,661,663],{"id":662},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[55,665,666,667,671],{},"Sonic horns are increasingly specified alongside or in place of ",[67,668,670],{"href":669},"\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.",[88,673,135],{"id":134},[100,675,676,681,687,693,699],{},[103,677,678],{},[67,679,680],{"href":511},"Acoustic cleaner",[103,682,683],{},[67,684,686],{"href":685},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[103,688,689],{},[67,690,692],{"href":691},"\u002Fglossary\u002Fbell-horn","Bell horn",[103,694,695],{},[67,696,698],{"href":697},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[103,700,701],{},[67,702,703],{"href":654},"Low-frequency acoustic cleaner",{"title":159,"searchDepth":160,"depth":160,"links":705},[706,707,708,709,710],{"id":537,"depth":160,"text":538},{"id":549,"depth":160,"text":550},{"id":621,"depth":160,"text":622},{"id":662,"depth":160,"text":663},{"id":134,"depth":160,"text":135},"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.",{},[715,716,717,718,719,720],"acoustic-cleaner","acoustic-cleaning-system","sonic-sootblower","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":722,"description":723},"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.",[725,728,731],{"title":726,"url":727},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":729,"url":730},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":732,"url":733},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",1782613727293]