{"id":2236,"date":"2024-10-21T06:46:51","date_gmt":"2024-10-21T06:46:51","guid":{"rendered":"https:\/\/regenerative-thermal-oxidizers.com\/recuperative-thermal-oxidizer-efficiency\/"},"modified":"2024-10-21T06:46:51","modified_gmt":"2024-10-21T06:46:51","slug":"recuperative-thermal-oxidizer-efficiency","status":"publish","type":"post","link":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/recuperative-thermal-oxidizer-efficiency\/","title":{"rendered":"Rekupera\u010dn\u00ed tepeln\u00e1 oxida\u010dn\u00ed \u00fa\u010dinnost"},"content":{"rendered":"<p><!DOCTYPE html><br \/>\n<html><br \/>\n<head><br \/>\n<title>Rekupera\u010dn\u00ed tepeln\u00e1 oxida\u010dn\u00ed \u00fa\u010dinnost<\/title><br \/>\n<\/head><br \/>\n<body><\/p>\n<h1><a href=\"https:\/\/regenerative-thermal-oxidizers.com\/cs\/rto\/\">Rekupera\u010dn\u00ed tepeln\u00fd oxid\u00e1tor<\/a> \u00da\u010dinnost<\/h1>\n<h2>Zaveden\u00ed<\/h2>\n<p>Rekupera\u010dn\u00ed termick\u00fd oxid\u00e1tor je z\u00e1kladn\u00ed sou\u010d\u00e1st\u00ed pr\u016fmyslov\u00fdch proces\u016f pro regulaci zne\u010di\u0161t\u011bn\u00ed ovzdu\u0161\u00ed. Pom\u00e1h\u00e1 odstra\u0148ovat \u0161kodliv\u00e9 zne\u010di\u0161\u0165uj\u00edc\u00ed l\u00e1tky z v\u00fdfukov\u00fdch plyn\u016f jejich tepeln\u00fdm rozkladem. Jedn\u00edm z kl\u00ed\u010dov\u00fdch aspekt\u016f rekupera\u010dn\u00edho termick\u00e9ho oxid\u00e1toru je jeho \u00fa\u010dinnost, kter\u00e1 p\u0159\u00edmo ovliv\u0148uje jeho v\u00fdkon a dopad na \u017eivotn\u00ed prost\u0159ed\u00ed. V tomto \u010dl\u00e1nku se budeme zab\u00fdvat r\u016fzn\u00fdmi faktory, kter\u00e9 ovliv\u0148uj\u00ed \u00fa\u010dinnost rekupera\u010dn\u00edho termick\u00e9ho oxid\u00e1toru.<\/p>\n<h2>1. Syst\u00e9m rekuperace tepla<\/h2>\n<ul>\n<li>Syst\u00e9m rekuperace tepla hraje z\u00e1sadn\u00ed roli ve zvy\u0161ov\u00e1n\u00ed \u00fa\u010dinnosti rekuperativn\u00edho termick\u00e9ho oxid\u00e1toru. Vyu\u017e\u00edv\u00e1 tepelnou energii z upraven\u00fdch plyn\u016f k p\u0159edeh\u0159\u00e1t\u00ed vstupn\u00edch zne\u010di\u0161\u0165uj\u00edc\u00edch l\u00e1tek. Tento proces p\u0159edeh\u0159\u00edv\u00e1n\u00ed sni\u017euje energii pot\u0159ebnou k dosa\u017een\u00ed po\u017eadovan\u00e9 oxida\u010dn\u00ed teploty, a t\u00edm zvy\u0161uje celkovou \u00fa\u010dinnost.<\/li>\n<li>V syst\u00e9mu rekuperace tepla se pou\u017e\u00edvaj\u00ed \u00fa\u010dinn\u00e9 v\u00fdm\u011bn\u00edky tepla, kter\u00e9 maximalizuj\u00ed p\u0159enos tepla mezi v\u00fdfukov\u00fdmi plyny a vstupuj\u00edc\u00edmi zne\u010di\u0161\u0165uj\u00edc\u00edmi l\u00e1tkami. Tyto v\u00fdm\u011bn\u00edky tepla jsou navr\u017eeny tak, aby optimalizovaly povrchovou plochu a minimalizovaly tepeln\u00e9 ztr\u00e1ty, \u010d\u00edm\u017e zaji\u0161\u0165uj\u00ed p\u0159enos v\u00fdznamn\u00e9ho mno\u017estv\u00ed tepla.<\/li>\n<li>Spr\u00e1vn\u00e1 izolace syst\u00e9mu rekuperace tepla je z\u00e1sadn\u00ed pro prevenci tepeln\u00fdch ztr\u00e1t. Pro minimalizaci p\u0159enosu tepla do okoln\u00edho prost\u0159ed\u00ed se pou\u017e\u00edvaj\u00ed izola\u010dn\u00ed materi\u00e1ly s n\u00edzkou tepelnou vodivost\u00ed.<\/li>\n<\/ul>\n<h2>2. Regulace spalov\u00e1n\u00ed<\/h2>\n<ul>\n<li>P\u0159esn\u00e1 regulace spalov\u00e1n\u00ed je nezbytn\u00e1 pro maximalizaci \u00fa\u010dinnosti rekuperativn\u00edho termick\u00e9ho oxid\u00e1toru. Pom\u011br vzduchu a paliva by m\u011bl b\u00fdt pe\u010dliv\u011b udr\u017eov\u00e1n, aby se zajistilo \u00fapln\u00e9 spalov\u00e1n\u00ed zne\u010di\u0161\u0165uj\u00edc\u00edch l\u00e1tek. Prost\u0159ed\u00ed bohat\u00e9 na palivo m\u016f\u017ee v\u00e9st k ne\u00fapln\u00e9 oxidaci, zat\u00edmco prost\u0159ed\u00ed chud\u00e9 na palivo m\u016f\u017ee v\u00e9st k pl\u00fdtv\u00e1n\u00ed energi\u00ed.<\/li>\n<li>Pro monitorov\u00e1n\u00ed a \u00fapravu spalovac\u00edho procesu v re\u00e1ln\u00e9m \u010dase se pou\u017e\u00edvaj\u00ed pokro\u010dil\u00e9 \u0159\u00eddic\u00ed syst\u00e9my, jako jsou kysl\u00edkov\u00e9 senzory a zp\u011btnovazebn\u00ed smy\u010dky. Tyto syst\u00e9my zaji\u0161\u0165uj\u00ed optim\u00e1ln\u00ed \u00fa\u010dinnost spalov\u00e1n\u00ed a minimalizuj\u00ed tvorbu \u0161kodliv\u00fdch vedlej\u0161\u00edch produkt\u016f.<\/li>\n<li>Pou\u017eit\u00ed v\u00edce ho\u0159\u00e1k\u016f rovnom\u011brn\u011b rozm\u00edst\u011bn\u00fdch v oxida\u010dn\u00ed komo\u0159e pom\u00e1h\u00e1 dos\u00e1hnout rovnom\u011brn\u00e9ho rozlo\u017een\u00ed teploty. Tato rovnom\u011brnost zlep\u0161uje oxida\u010dn\u00ed proces a zlep\u0161uje celkovou \u00fa\u010dinnost.<\/li>\n<\/ul>\n<h2>3. P\u0159edeh\u0159\u00edv\u00e1n\u00ed vzduchu<\/h2>\n<ul>\n<li>P\u0159edeh\u0159\u00edv\u00e1n\u00ed vzduchu je dal\u0161\u00edm kl\u00ed\u010dov\u00fdm faktorem pro zv\u00fd\u0161en\u00ed \u00fa\u010dinnosti rekuperativn\u00edho termick\u00e9ho oxid\u00e1toru. P\u0159edeh\u0159\u00e1t\u00fd vzduch sni\u017euje energii pot\u0159ebnou k dosa\u017een\u00ed oxida\u010dn\u00ed teploty a zlep\u0161uje \u00fa\u010dinnost spalov\u00e1n\u00ed.<\/li>\n<li>K p\u0159enosu tepla z upraven\u00fdch plyn\u016f do p\u0159iv\u00e1d\u011bn\u00e9ho vzduchu se pou\u017e\u00edvaj\u00ed \u00fa\u010dinn\u00e9 p\u0159edeh\u0159\u00edva\u010de vzduchu, jako jsou deskov\u00e9 v\u00fdm\u011bn\u00edky tepla nebo regenerativn\u00ed v\u00fdm\u011bn\u00edky tepla. Tato za\u0159\u00edzen\u00ed zaji\u0161\u0165uj\u00ed maxim\u00e1ln\u00ed rekuperaci tepla a minimalizuj\u00ed spot\u0159ebu energie.<\/li>\n<li>Pravideln\u00e1 \u00fadr\u017eba a \u010di\u0161t\u011bn\u00ed syst\u00e9mu p\u0159edeh\u0159evu vzduchu jsou nezbytn\u00e9 pro prevenci zne\u010di\u0161t\u011bn\u00ed a udr\u017een\u00ed optim\u00e1ln\u00ed \u00fa\u010dinnosti p\u0159enosu tepla. Jak\u00e9koli zne\u010di\u0161t\u011bn\u00ed nebo ucp\u00e1n\u00ed m\u016f\u017ee br\u00e1nit procesu p\u0159enosu tepla a sni\u017eovat celkovou \u00fa\u010dinnost oxida\u010dn\u00edho za\u0159\u00edzen\u00ed.<\/li>\n<\/ul>\n<h2>4. N\u00e1vrh a optimalizace syst\u00e9mu<\/h2>\n<ul>\n<li>Celkov\u00fd n\u00e1vrh a optimalizace rekupera\u010dn\u00edho termick\u00e9ho oxid\u00e1toru v\u00fdznamn\u011b ovliv\u0148uj\u00ed jeho \u00fa\u010dinnost. B\u011bhem f\u00e1ze n\u00e1vrhu je t\u0159eba pe\u010dliv\u011b zv\u00e1\u017eit faktory, jako je doba zdr\u017een\u00ed, rozlo\u017een\u00ed proud\u011bn\u00ed a pokles tlaku.<\/li>\n<li>Dostate\u010dn\u011b dimenzovan\u00e9 oxida\u010dn\u00ed \u010dinidlo zaji\u0161\u0165uje dostate\u010dnou dobu zdr\u017een\u00ed pro \u00faplnou oxidaci zne\u010di\u0161\u0165uj\u00edc\u00edch l\u00e1tek. Nedostate\u010dn\u00e1 doba zdr\u017een\u00ed m\u016f\u017ee v\u00e9st k nedokonal\u00e9mu spalov\u00e1n\u00ed a sn\u00ed\u017een\u00e9 \u00fa\u010dinnosti.<\/li>\n<li>Efektivn\u00ed distribuce proud\u011bn\u00ed v oxida\u010dn\u00ed komo\u0159e pom\u00e1h\u00e1 udr\u017eovat rovnom\u011brnou teplotu a koncentraci plynu, \u010d\u00edm\u017e zaji\u0161\u0165uje optim\u00e1ln\u00ed \u00fa\u010dinnost oxidace.<\/li>\n<li>Minimalizace tlakov\u00e9 ztr\u00e1ty v cel\u00e9m syst\u00e9mu sni\u017euje spot\u0159ebu energie a zvy\u0161uje celkovou \u00fa\u010dinnost. Pro dosa\u017een\u00ed tohoto c\u00edle je kl\u00ed\u010dov\u00fd spr\u00e1vn\u00fd v\u00fdb\u011br velikost\u00ed potrub\u00ed, ventil\u00e1tor\u016f a regula\u010dn\u00edch ventil\u016f.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/regenerative-thermal-oxidizers.com\/wp-content\/uploads\/2024\/10\/0-6.RTO-for-Petrochemical-.webp\" alt=\"Rekupera\u010dn\u00ed tepeln\u00e1 oxida\u010dn\u00ed \u00fa\u010dinnost\" title=\"\"><\/p>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>\u00da\u010dinnost je kritick\u00fdm faktorem p\u0159i n\u00e1vrhu a provozu rekupera\u010dn\u00edho termick\u00e9ho oxid\u00e1toru. Zohledn\u011bn\u00edm faktor\u016f, jako je rekuperace tepla, regulace spalov\u00e1n\u00ed, p\u0159edeh\u0159ev vzduchu a optimalizace n\u00e1vrhu syst\u00e9mu, mohou pr\u016fmyslov\u00e9 procesy maximalizovat \u00fa\u010dinnost sv\u00fdch termick\u00fdch oxid\u00e1tor\u016f. Dob\u0159e navr\u017een\u00fd a efektivn\u011b provozovan\u00fd rekupera\u010dn\u00ed termick\u00fd oxid\u00e1tor nejen zaji\u0161\u0165uje \u00fa\u010dinnou kontrolu zne\u010di\u0161t\u011bn\u00ed ovzdu\u0161\u00ed, ale tak\u00e9 sni\u017euje spot\u0159ebu energie a dopad na \u017eivotn\u00ed prost\u0159ed\u00ed.<\/p>\n<p><\/body><br \/>\n<\/html><!DOCTYPE html><br \/>\n<html><br \/>\n<head><br \/>\n<title>P\u0159edstaven\u00ed spole\u010dnosti<\/title><br \/>\n<\/head><br \/>\n<body><\/p>\n<h2>P\u0159edstaven\u00ed spole\u010dnosti<\/h2>\n<p>Jsme high-tech v\u00fdrobn\u00ed podnik specializuj\u00edc\u00ed se na komplexn\u00ed \u010di\u0161t\u011bn\u00ed a sni\u017eov\u00e1n\u00ed emis\u00ed uhl\u00edku z odpadn\u00edch plyn\u016f s vyu\u017eit\u00edm energeticky \u00fasporn\u00fdch technologi\u00ed pro t\u011bkav\u00e9 organick\u00e9 slou\u010deniny (VOC). Mezi na\u0161e kl\u00ed\u010dov\u00e9 technologie pat\u0159\u00ed tepeln\u00e1 energie, spalov\u00e1n\u00ed, t\u011bsn\u011bn\u00ed a automatick\u00e9 \u0159\u00edzen\u00ed. Dok\u00e1\u017eeme simulovat teplotn\u00ed pole a pole proud\u011bn\u00ed vzduchu, stejn\u011b jako testovat v\u00fdkon keramick\u00fdch materi\u00e1l\u016f pro akumulaci tepla, v\u00fdb\u011br materi\u00e1l\u016f pro adsorpci molekul\u00e1rn\u00edch s\u00edt a vysokoteplotn\u00ed spalovac\u00ed oxidaci organick\u00fdch slou\u010denin VOC.<\/p>\n<h2>V\u00fdhody t\u00fdmu<\/h2>\n<p>V Si-anu m\u00e1me v\u00fdzkumn\u00e9 a v\u00fdvojov\u00e9 centrum pro technologie RTO a technologick\u00e9 centrum pro sni\u017eov\u00e1n\u00ed emis\u00ed uhl\u00edku z odpadn\u00edch plyn\u016f a tak\u00e9 v\u00fdrobn\u00ed z\u00e1kladnu o rozloze 30 000 metr\u016f \u010dtvere\u010dn\u00edch v Yanglingu. Jsme p\u0159edn\u00edm v\u00fdrobcem za\u0159\u00edzen\u00ed RTO a rota\u010dn\u00edch za\u0159\u00edzen\u00ed s molekul\u00e1rn\u00edmi s\u00edty na cel\u00e9m sv\u011bt\u011b. N\u00e1\u0161 hlavn\u00ed technick\u00fd t\u00fdm poch\u00e1z\u00ed z V\u00fdzkumn\u00e9ho \u00fastavu pro letectv\u00ed a kosmonautiku (6. akademie letectv\u00ed a kosmonautiky). V sou\u010dasn\u00e9 dob\u011b m\u00e1me v\u00edce ne\u017e 360 zam\u011bstnanc\u016f, v\u010detn\u011b v\u00edce ne\u017e 60 technick\u00fdch \u010dlen\u016f v\u00fdzkumn\u00e9 a v\u00fdvojov\u00e9 p\u00e1te\u0159e, v\u010detn\u011b 3 vedouc\u00edch in\u017een\u00fdr\u016f s v\u00fdzkumnou \u00farovn\u00ed, 6 vedouc\u00edch in\u017een\u00fdr\u016f a 4 doktor\u016f termodynamiky.<\/p>\n<h2>Z\u00e1kladn\u00ed produkty<\/h2>\n<p>Mezi na\u0161e hlavn\u00ed produkty pat\u0159\u00ed rota\u010dn\u00ed ventil RTO (rekuperativn\u00ed termick\u00fd oxid\u00e1tor) a rota\u010dn\u00ed kolo s adsorp\u010dn\u00ed koncentrac\u00ed molekul\u00e1rn\u00edho s\u00edta. V kombinaci s na\u0161imi odborn\u00fdmi znalostmi v oblasti ochrany \u017eivotn\u00edho prost\u0159ed\u00ed a in\u017een\u00fdrstv\u00ed tepeln\u00fdch energetick\u00fdch syst\u00e9m\u016f m\u016f\u017eeme z\u00e1kazn\u00edk\u016fm poskytovat komplexn\u00ed \u0159e\u0161en\u00ed pro \u010di\u0161t\u011bn\u00ed pr\u016fmyslov\u00fdch odpadn\u00edch plyn\u016f, sni\u017eov\u00e1n\u00ed emis\u00ed uhl\u00edku a vyu\u017eit\u00ed tepeln\u00e9 energie za r\u016fzn\u00fdch provozn\u00edch podm\u00ednek.<\/p>\n<h2>Certifikace, patenty a vyznamen\u00e1n\u00ed<\/h2>\n<p>\u2013 Certifikace syst\u00e9mu spr\u00e1vy du\u0161evn\u00edho vlastnictv\u00ed<br \/>\n\u2013 Certifikace syst\u00e9mu managementu kvality<br \/>\n\u2013 Certifikace syst\u00e9mu environment\u00e1ln\u00edho managementu<br \/>\n\u2013 Kvalifikace pro podniky ve stavebnictv\u00ed<br \/>\n\u2013 High-tech podnik<br \/>\n\u2013 Patent na rota\u010dn\u00ed ventil v rekuperativn\u00edm termick\u00e9m oxid\u00e1toru<br \/>\n\u2013 Patent na za\u0159\u00edzen\u00ed na spalov\u00e1n\u00ed rota\u010dn\u00edho kola s akumulac\u00ed tepla<br \/>\n\u2013 Patent na rota\u010dn\u00ed kolo s diskov\u00fdm molekul\u00e1rn\u00edm s\u00edtem\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/regenerative-thermal-oxidizers.com\/wp-content\/uploads\/2024\/10\/0-rto-factory-1.webp\" alt=\"Tov\u00e1rna spole\u010dnosti\" title=\"\"><\/p>\n<h2>V\u00fdb\u011br spr\u00e1vn\u00e9ho za\u0159\u00edzen\u00ed RTO<\/h2>\n<p>Pro v\u00fdb\u011br vhodn\u00e9ho za\u0159\u00edzen\u00ed RTO je t\u0159eba zv\u00e1\u017eit n\u00e1sleduj\u00edc\u00ed body:<\/p>\n<ol>\n<li>Ur\u010dete vlastnosti odpadn\u00edho plynu<\/li>\n<li>Pochopte m\u00edstn\u00ed p\u0159edpisy a emisn\u00ed normy<\/li>\n<li>Vyhodno\u0165te energetickou \u00fa\u010dinnost<\/li>\n<li>Zva\u017ete provoz a \u00fadr\u017ebu<\/li>\n<li>Analyzujte rozpo\u010det a n\u00e1klady<\/li>\n<li>Vyberte vhodn\u00fd typ RTO<\/li>\n<li>Zva\u017ete environment\u00e1ln\u00ed a bezpe\u010dnostn\u00ed faktory<\/li>\n<li>Prov\u00e1d\u011bjte testov\u00e1n\u00ed a ov\u011b\u0159ov\u00e1n\u00ed v\u00fdkonu<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/regenerative-thermal-oxidizers.com\/wp-content\/uploads\/2023\/12\/0_rto-17.webp\" alt=\"V\u00fdb\u011br za\u0159\u00edzen\u00ed RTO\" title=\"\"><\/p>\n<h2>Servisn\u00ed proces<\/h2>\n<p>N\u00e1\u0161 servisn\u00ed proces zahrnuje n\u00e1sleduj\u00edc\u00ed kroky:<\/p>\n<ol>\n<li>Konzultace a hodnocen\u00ed: P\u0159edb\u011b\u017en\u00e1 konzultace, inspekce na m\u00edst\u011b a anal\u00fdza pot\u0159eb<\/li>\n<li>N\u00e1vrh a v\u00fdvoj \u0159e\u0161en\u00ed: N\u00e1vrh \u0159e\u0161en\u00ed, simulace a modelov\u00e1n\u00ed a revize \u0159e\u0161en\u00ed<\/li>\n<li>V\u00fdroba a zpracov\u00e1n\u00ed: Zak\u00e1zkov\u00e1 v\u00fdroba, kontrola kvality a tov\u00e1rn\u00ed testov\u00e1n\u00ed<\/li>\n<li>Instalace a uveden\u00ed do provozu: Instalace, uveden\u00ed do provozu a \u0161kolen\u00ed na m\u00edst\u011b<\/li>\n<li>Poprodejn\u00ed podpora: Pravideln\u00e1 \u00fadr\u017eba, technick\u00e1 podpora a dod\u00e1vky n\u00e1hradn\u00edch d\u00edl\u016f<\/li>\n<\/ol>\n<p>Jsme hrd\u00ed na to, \u017ee jsme poskytovatelem komplexn\u00edch \u0159e\u0161en\u00ed s profesion\u00e1ln\u00edm t\u00fdmem, kter\u00fd se v\u011bnuje p\u0159izp\u016fsoben\u00ed RTO \u0159e\u0161en\u00ed pro na\u0161e klienty.<\/p>\n<p>Autor: Miya<\/p>\n<p><\/body><br \/>\n<\/html><\/p>","protected":false},"excerpt":{"rendered":"<p>Recuperative Thermal Oxidizer Efficiency Recuperative Thermal Oxidizer Efficiency Introduction A recuperative thermal oxidizer is an essential component in industrial processes for air pollution control. It helps to eliminate harmful pollutants from exhaust gases by thermally decomposing them. One crucial aspect of a recuperative thermal oxidizer is its efficiency, which directly impacts its performance and environmental [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[22],"tags":[23,18,19,20],"class_list":["post-2236","post","type-post","status-publish","format-standard","hentry","category-recuperative-thermal-oxidizer-blog","tag-recuperative-thermal-oxidizer","tag-regenerative-thermal-oxidizer","tag-rto","tag-rto-thermal-oxidizer"],"_links":{"self":[{"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/posts\/2236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/comments?post=2236"}],"version-history":[{"count":0,"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/posts\/2236\/revisions"}],"wp:attachment":[{"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/media?parent=2236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/categories?post=2236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/regenerative-thermal-oxidizers.com\/cs\/wp-json\/wp\/v2\/tags?post=2236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}