I-Desulfurization gypsum iyi-gypsum yomkhiqizo wezimboni etholakala ngokususa i-sulfurizing nokuhlanza igesi ye-flue ekhiqizwa ngemva kokushiswa kukaphethiloli oqukethe isulfure ngokusebenzisa umcako ocolekile noma i-limestone powder slurry.Ukwakheka kwayo kwamakhemikhali kuyafana naleyo ye-dihydrate gypsum yemvelo, ikakhulukazi i-CaSO4 · 2H2O.Njengamanje, indlela yezwe lami yokuphehla ugesi isabuswa ukuphehlwa kukagesi ngamalahle, kanti i-SO2 ekhishwa ngamalahle ohlelweni lokuphehla ugesi oshisayo ibalelwa ngaphezu kwama-50% wezinto ezikhishwa minyaka yonke zezwe lami.Inani elikhulu lokukhishwa kwe-sulphur dioxide liye labangela ukungcoliswa kwemvelo okukhulu.Ukusetshenziswa kobuchwepheshe be-flue gas desulfurization ukukhiqiza i-gypsum ye-desulfurized kuyisinyathelo esibalulekile sokuxazulula ukuthuthukiswa kobuchwepheshe bezimboni ezihlobene namalahle.Ngokwezibalo ezingaphelele, ukukhishwa kwegypsum emanzi e-desulfurized ezweni lami sekudlule izigidi ezingama-90 t/a, futhi indlela yokucubungula ye-desulfurized gypsum inqwabelana kakhulu, engagcini nje ngokuthatha umhlaba, kodwa futhi idala ukumosheka okukhulu kwezinsiza.
I-Gypsum inemisebenzi yesisindo sokukhanya, ukunciphisa umsindo, ukuvimbela umlilo, ukufakwa kwe-thermal, njll. Ingasetshenziswa ekukhiqizeni usimende, ukukhiqizwa kwe-gypsum yokwakha, ubunjiniyela bokuhlobisa kanye neminye imikhakha.Njengamanje, izazi eziningi zenze ucwaningo ngokuplasta usimende.Ucwaningo lubonisa ukuthi izinto zokuplasta zikakhonkolo zinokunwebeka okuncane, zikwazi ukusebenza kahle kanye nepulasitiki, futhi zingangena esikhundleni sezinto ezijwayelekile zokuplasta zokuhlobisa udonga lwasendlini.Ucwaningo luka-Xu Jianjun nabanye lubonise ukuthi i-gypsum eyenziwe nge-desulfurized ingasetshenziswa ukwenza izinto zodonga ezingasindi.Ucwaningo olwenziwa u-Ye Beihong nabanye luye lwabonisa ukuthi i-gypsum yokunameka ekhiqizwa i-gypsum esuliwe ingasetshenziselwa ungqimba olunamatshe olungaphakathi lodonga lwangaphandle, udonga olungaphakathi oluhlukanisayo nophahla, futhi ingaxazulula izinkinga zekhwalithi evamile njengokugoqa nokuqhekeka udaka lwendabuko olukhonkolo.I-Gypsum yokuplasta engasindi iwuhlobo olusha lwezinto zokuplasta ezinobungani nemvelo.Yenziwe nge-hemihydrate gypsum njengento eyinhloko ye-cementitious ngokungeza ama-aggregates angasindi kanye nezixube.Uma kuqhathaniswa nezinto zokupulasitela zendabuko, akulula ukuqhekeka, ukunamathela Ukubopha okuhle, ukushwabana okuhle, ukuvikela okuluhlaza kanye nemvelo.Ukusetshenziswa kwe-gypsum ye-desulfurized ukukhiqiza i-hemihydrate gypsum akuxazululi kuphela inkinga yokuntuleka kwezinsiza ze-gypsum zokwakha zemvelo, kodwa futhi kuqaphela ukusetshenziswa kwensiza ye-gypsum desulfurized futhi kufeza inhloso yokuvikela imvelo.Ngakho-ke, ngokusekelwe ocwaningweni lwe-gypsum desulfurized, leli phepha lihlola isikhathi sokusetha, amandla aguquguqukayo namandla acindezelayo, ukutadisha izici ezithinta ukusebenza kwe-light-weight plastering desulfurization gypsum mortar, futhi inikeze isisekelo sethiyori sokuthuthukiswa kokukhanya- isisindo plastering desulfurization gypsum nodaka.
1 ukuhlola
1.1 Izinto ezisetshenziswayo
I-Desulfurization gypsum powder: I-Hemihydrate gypsum ekhiqizwa futhi ibalwa nge-flue gas desulfurization technology, izakhiwo zayo eziyisisekelo ziboniswa kuThebula 1. I-aggregate engasindi: kusetshenziswa ama-microbeads a-vitrified, futhi izakhiwo zawo eziyisisekelo ziboniswa kuThebula 2. Ama-microbeads a-Vitrified axutshwe ngezilinganiso ze-4 %, 8%, 12%, kanye no-16% ngokusekelwe esilinganisweni sobuningi bodaka lwegypsum olunamekiwe olukhanyayo.
I-retarder: Sebenzisa i-sodium citrate, ukuhlaziya amakhemikhali i-reagent ehlanzekile, i-sodium citrate isekelwe esilinganisweni sesisindo se-desulfurization gypsum mortar, futhi isilinganiso sokuxuba singu-0, 0.1%, 0.2%, 0.3%.
I-Cellulose ether: sebenzisa i-hydroxypropyl methylcellulose (HPMC), i-viscosity ingu-400, i-HPMC isekelwe esilinganisweni sesisindo sodaka lwegypsum olunamekiwe olukhanyayo, kanti isilinganiso sokuxuba singu-0, 0.1%, 0.2%, 0.4%.
1.2 Indlela yokuhlola
Ukusetshenziswa kwamanzi kanye nesikhathi sokusetha sokungaguquguquki okujwayelekile kwe-gypsum desulfurized kubhekisela ku-GB/T17669.4-1999 “Ukunqunywa Kwezakhiwo Ezingokoqobo Zokwakha I-Gypsum Plaster”, kanye nesikhathi sokusetha sokukhonkoloka kodaka lwegypsum olula lubhekisela ku-GB/T 28627- Ngo-2012 kwenziwa "Plastering Gypsum".
Amandla aguquguqukayo futhi acindezelayo we-gypsum desulfurized enziwa ngokusho kwe-GB/T9776-2008 “Building Gypsum”, futhi ama-specimens anosayizi we-40mm×40mm×160mm ayabunjwa, futhi amandla we-2h namandla omile akalwa ngokulandelana.Amandla aguquguqukayo futhi acindezelayo we-light-weight plastered desulfurized gypsum mortar wenziwa ngokusho kwe-GB/T 28627-2012 “Plastering Gypsum”, futhi amandla okuphulukisa okungokwemvelo kwe-1d ne-28d akalwa ngokulandelana.
2 Imiphumela nengxoxo
2.1 Umthelela wokuqukethwe kwempuphu ye-gypsum kuzakhiwo zemishini ye-gypsum yokuplasta engasindi ye-desulfurization
Isamba esiphelele se-gypsum powder, i-limestone powder kanye ne-lightweight aggregate ngu-100%, futhi inani le-fixed light aggregate ne-admixture lihlala lingashintshile.Lapho inani le-gypsum powder liyi-60%, i-70%, i-80%, ne-90%, i-desulfurization Imiphumela yamandla aguquguqukayo nokucindezela kwe-gypsum mortar.
Amandla aguquguqukayo namandla acindezelayo odaka lwegypsum olukhanyayo olunamekiwe kokubili akhula ngokukhula, okubonisa ukuthi idigri ye-hydration ye-gypsum iba yanele ngokukhula.Ngokukhula kwe-gypsum powder e-desulfurized, amandla aguquguqukayo namandla okucindezela we-gypsum elula yokufaka i-gypsum abonise ukuthambekela okuphezulu okuphezulu, kodwa ukwanda kwakuncane, futhi amandla okucindezela ezinsukwini ze-28 abonakala ikakhulukazi.Eminyakeni engu-1d, amandla okuguquguquka kwe-gypsum powder axutshwe ne-90% akhuphuke ngo-10.3% uma kuqhathaniswa ne-60% ye-gypsum powder, futhi amandla okucindezela ahambisanayo anda ngo-10.1%.Lapho eneminyaka engu-28 ubudala, amandla okuguquguquka kwe-gypsum powder ahlanganiswe ne-90% akhuphuke ngo-8.8% uma kuqhathaniswa ne-gypsum powder exutshwe ne-60%, futhi amandla okucindezela ahambisanayo anda ngo-2.6%.Ukufingqa, kungaphetha ngokuthi inani le-gypsum powder linomphumela omkhulu emandleni aguquguqukayo kunamandla okucindezela.
2.2 Umthelela wokuqukethwe kwe-aggregate engasindi kuzakhiwo zemishini ze-gypsum ekhokhiwe nge-desulfurized gypsum.
Isamba esiphelele se-gypsum powder, i-limestone powder kanye ne-lightweight aggregate yi-100%, futhi inani le-gypsum powder engaguquki kanye ne-admixture lihlala lingashintshiwe.Lapho inani le-microbeads e-vitrified liyi-4%, 8%, 12%, kanye ne-16%, i-plaster elula Imiphumela yamandla aguquguqukayo kanye namandla acindezelayo e-desulfurized gypsum mortar.
Ngaso leso sikhathi, amandla aguquguqukayo namandla acindezelayo odaka lwegypsum olukhanyayo olunamekiwe ehla ngokunyuka kokuqukethwe kwe-microbeads e-vitrified.Lokhu kungenxa yokuthi iningi lama-microbeads ane-vitrified anesakhiwo esingenalutho ngaphakathi futhi amandla awo aphansi, okunciphisa amandla aguquguqukayo kanye nokucindezelwa kwe-lightweight plastering gypsum mortar.Eminyakeni engu-1d, amandla aguquguqukayo we-16% i-gypsum powder ancishiswa ngo-35.3% uma kuqhathaniswa ne-4% ye-gypsum powder, futhi amandla okucindezela ahambisanayo ancishiswa ngo-16.3%.Ngesikhathi sezinsuku ze-28, amandla okuguquguquka kwe-16% i-gypsum powder ancishiswa ngo-24.6% uma kuqhathaniswa ne-4% ye-gypsum powder, kuyilapho amandla okucindezela ahambisanayo ancishiswa kuphela yi-6.0%.Ukufingqa, kungaphethwa ngokuthi umthelela wokuqukethwe kwe-vitrified microbeads kumandla aguquguqukayo mkhulu kunalowo emandleni okucindezela.
2.3 Umthelela wokuqukethwe kwe-retarder ekusetheni isikhathi segypsum ekhokhiwe nge-desulfurized gypsum
Isamba esiphelele se-gypsum powder, i-limestone powder kanye ne-lightweight aggregate yi-100%, futhi isilinganiso se-gypsum powder ehleliwe, i-limestone powder, i-lightweight aggregate kanye ne-cellulose ether ihlala ingashintshiwe.Lapho umthamo we-sodium citrate ungu-0, 0.1%, 0.2%, 0.3 %, ukusetha imiphumela yesikhathi sodaka lwegypsum olunamekiwe olukhanyayo.
Isikhathi sokuqala sokusetha kanye nesikhathi sokugcina sokusetha sodaka lwegypsum olulamekiwe olukhanyayo kokubili sikhuphuka ngokwanda kokuqukethwe kwe-sodium citrate, kodwa ukwanda kwesikhathi sokusetha kuncane.Uma okuqukethwe kwe-sodium citrate kungu-0.3%, isikhathi sokuqala sokusetha sandisa i-28min, futhi isikhathi sokugcina sokusetha sandiswa nge-33min.Ukwelulwa kwesikhathi sokusetha kungase kube ngenxa yendawo enkulu ye-gypsum desulfurized, ekwazi ukumunca i-retarder ezungeze izinhlayiya ze-gypsum, ngaleyo ndlela yehlise izinga lokuqedwa kwe-gypsum futhi ivimbele ukucwebezela kwe-gypsum, okuholela ekungakwazini kwe-gypsum slurry. ukwakha uhlelo oluqinile lwesakhiwo.Yandisa isikhathi sokusetha se-gypsum.
2.4 Umthelela wokuqukethwe kwe-cellulose ether kuzakhiwo zemishini zegypsum ekhokhiwe nge-desulfurized gypsum.
Isamba esiphelele se-gypsum powder, i-limestone powder kanye ne-lightweight aggregate ngu-100%, futhi umthamo we-gypsum powder engashintshi, i-limestone powder, i-lightweight aggregate kanye ne-retarder ayishintshile.Lapho umthamo we-hydroxypropyl methylcellulose ungu-0, 0.1%, 0.2% no-0.4%, imiphumela yamandla aguquguqukayo kanye nacindezelayo wodaka lwegypsum olunamekiwe olukhanyayo.
Eminyakeni engu-1, amandla aguquguqukayo odaka lwe-gypsum okhanyayo owenziwe nge-desulfurized aqala ukwanda bese ehla ngokunyuka kokuqukethwe kwe-hydroxypropyl methylcellulose;eminyakeni engu-28, amandla okuguquguquka okukhanya okukhonjiwe kwe-gypsum mortar Ngokukhula kokuqukethwe kwe-hydroxypropyl methylcellulose, amandla aguquguqukayo abonisa umkhuba wokuqala wokuncipha, bese ukhula bese uyancipha.Uma okuqukethwe kwe-hydroxypropyl methylcellulose kungu-0.2%, amandla okuguquguquka afinyelela ezingeni eliphezulu, futhi edlula amandla ahambisanayo lapho okuqukethwe kwe-cellulose kungu-0. Kungakhathaliseki ubudala be-1d noma i-28d, amandla okucindezela okukhanya okunamathiselwe kwe-gypsum mortar ayancipha ukwanda kokuqukethwe kwe-hydroxypropyl methylcellulose, kanye nokuthambekela kokwehla okuhambisanayo kubonakala kakhulu ku-28d.Lokhu kungenxa yokuthi i-cellulose ether inomphumela wokugcinwa kwamanzi nokuqina, futhi isidingo samanzi sokungaguquguquki okujwayelekile sizokhula ngokunyuka kokuqukethwe kwe-cellulose ether, okuholela ekwandeni kwesilinganiso samanzi-samende wesakhiwo se-slurry, ngaleyo ndlela sinciphise amandla. isampula ye-gypsum.
3 Isiphetho
(1) Idigri ye-hydration ye-gypsum desulfurized iba yanele ngokukhula.Ngokukhula kokuqukethwe kwempuphu ye-gypsum e-desulfurized, amandla aguquguqukayo futhi acindezelayo we-gypsum elula yokufaka i-gypsum abonise ukuthambekela okungaphezulu, kodwa ukunyuka kwakuncane.
(2) Ngokukhula kokuqukethwe kwe-microbeads e-vitrified, amandla aguquguqukayo namandla acindezelayo odaka lwe-gypsum olunamekwe ngesisindo sokukhanya ayancipha ngokufanele, kodwa umphumela wokuqukethwe kwe-microbeads e-vitrified kumandla aguquguqukayo mkhulu kunalowo wamandla okucindezela. amandla.
(3) Ngokukhula kokuqukethwe kwe-sodium citrate, isikhathi sokuqala sokusetha kanye nesikhathi sokugcina sokugcina se-gypsum mortar ekhanyiswe nge-desulfurized sikhula isikhathi eside, kodwa lapho okuqukethwe kwe-sodium citrate kukuncane, umphumela wokusetha isikhathi awubonakali.
(4) Ngokukhula kokuqukethwe kwe-hydroxypropyl methylcellulose, amandla acindezelayo odaka lwe-gypsum olulayishiwe olukhanyayo ayancipha, kodwa amandla aguquguqukayo abonisa umkhuba wokunyuka kokuqala bese wehla ngo-1d, futhi ku-28d Kubonise umkhuba wokuncipha kuqala, bese ukwanda bese kuncipha.
Isikhathi sokuthumela: Feb-02-2023