Desulfurization gypsum bụ ụlọ ọrụ gypsum sitere na ngwaahịa nke enwetara site na desulfurizing na sachapụ gas flue nke na-emepụta mgbe ọkụ ọkụ nke sọlfọ nwere mmanụ sitere na ezigbo wayo ma ọ bụ limestone powder slurry. Ngwakọta kemịkalụ ya bụ otu nke gypsum eke dihydrate, tumadi CaSO4 · 2H2O. Ka ọ dị ugbu a, usoro mmepụta ike nke obodo m ka na-achịkwa ike ọkụ na-agba ọkụ, na SO2 nke coal na-ebupụta n'usoro mmepụta ike ọkụ na-akpata ihe karịrị 50% nke mba m kwa afọ. Ọnụ ọgụgụ dị ukwuu nke ikuku sọlfọ dioxide akpatala ajọ mmetọ gburugburu ebe obibi. Iji teknụzụ desulfurization flue gas na-emepụta gypsum desulfurized bụ ihe dị mkpa iji dozie mmepe teknụzụ nke ụlọ ọrụ ndị metụtara coal. Dị ka ezughị ezu ọnụ ọgụgụ, emission nke mmiri desulfurized gypsum mba m karịrị 90 nde t / a, na nhazi usoro nke desulfurized gypsum na-tumadi ikpo, nke ọ bụghị nanị na ogide ala, ma na-akpata a nnukwu n'efu nke ihe onwunwe.
Gypsum nwere ọrụ nke ịdị arọ dị arọ, mbelata mkpọtụ, mgbochi ọkụ, ihe mkpuchi ọkụ, wdg. Enwere ike iji ya mee ihe na mmepụta ciment, mmepụta gypsum na-ewu ụlọ, ihe ịchọ mma na ubi ndị ọzọ. Ka ọ dị ugbu a, ọtụtụ ndị ọkà mmụta emeela nchọpụta banyere plasta. Nnyocha ahụ na-egosi na ihe nkedo plasta nwere micro-mgbasawanye, ezigbo ọrụ na plasticity, ma nwee ike dochie ihe plasta omenala maka ịchọ mma mgbidi ime ụlọ. Nnyocha nke Xu Jianjun na ndị ọzọ egosila na a pụrụ iji gypsum desulfurized mee ihe mgbidi dị arọ. Nnyocha nke Ye Beihong na ndị ọzọ egosila na gypsum plasta na-emepụta site na gypsum desulfurized nwere ike iji mee ihe maka plasta oyi akwa nke n'ime akụkụ nke mgbidi dị n'ime, mgbidi nkebi na n'elu ụlọ, ma nwee ike dozie nsogbu ndị a na-ahụkarị dị ka shelling na cracking. ngwa agha plasta omenala. Gypsum plasta dị fechaa bụ ụdị ọhụrụ nke ihe plasta na-emetụta gburugburu ebe obibi. A na-eme ya na hemihydrate gypsum dị ka isi ihe simenti na-emepụta site n'ịgbakwụnye mkpokọta dị arọ na ihe mgbakwunye. E jiri ya tụnyere omenala ciment plasta ihe, ọ dịghị mfe ịgbawa, arapara Ezi njide, mma shrinkage, green na gburugburu ebe obibi nchebe. Ojiji nke gypsum desulfurized na-emepụta gypsum hemihydrate ọ bụghị naanị na-edozi nsogbu nke enweghị akụrụngwa ụlọ gypsum sitere n'okike, kamakwa na-achọpụta ojiji akụrụngwa nke gypsum desulfurized ma nweta ebumnuche nke ichebe gburugburu ebe obibi. Ya mere, dabere na ọmụmụ nke desulfurized gypsum, akwụkwọ a na-anwale oge ntọala, ike mgbanwe na ike mkpakọ, na-amụ ihe na-emetụta arụmọrụ nke ìhè arọ plasta desulfurization gypsum ngwa agha, na-enye a theoretical ndabere maka mmepe nke ìhè- arọ plasta desulfurization ngwa agha gypsum.
1 nnwale
1.1 Akụrụngwa
Desulfurization gypsum ntụ ntụ: Hemihydrate gypsum na-emepụta na calcined site flue gas desulfurization technology, ya isi ihe na-egosi na Isiokwu 1. Lightweight mkpokọta: vitrified microbeads na-egosi na ya isi ihe na-egosi na Isiokwu 2. Vitrified microbeads na-agwakọta na nha nke 4. %, 8%, 12% na 16% dabere na oke nha nke ìhè plastered ngwa ngwa gypsum desulfurized.
Retarder: Jiri sodium citrate, chemical analysis dị ọcha reagent, sodium citrate dabeere na arọ ruru nke ìhè plasta desulfurization gypsum ngwa agha, na Ịgwakọta ruru bụ 0, 0.1%, 0,2%, 0.3%.
Cellulose ether: jiri hydroxypropyl methylcellulose (HPMC), viscosity bụ 400, HPMC dabeere na arọ ruru nke ìhè plastered desulfurized ngwa agha gypsum, na ngwakọta ruru 0, 0.1%, 0.2%, 0.4%.
1.2 Usoro ule
The mmiri oriri na mwube oge nke ọkọlọtọ adịgide adịgide nke desulfurized gypsum na-ezo aka GB/T17669.4-1999 "Mkpebi nke Physical Properties nke Building Gypsum plasta", na mwube oge nke ìhè plasta desulfurized gypsum ngwa agha na-ezo aka GB/T 28627- 2012 "Plastering Gypsum" a rụrụ.
A na-eme ike mgbanwe na mkpakọ nke gypsum desulfurized dị ka GB / T9776-2008 "Ụlọ Gypsum", na ihe atụ ndị nwere nha 40mm × 40mm × 160mm na-akpụzi, na ike 2h na ike akọrọ na-atụle n'otu n'otu. A na-eme ike mgbanwe na mkpakọ nke ngwa ngwa gypsum plastered dị arọ dị arọ dịka GB/T 28627-2012 "Plastering Gypsum", na ike nke ọgwụgwọ eke maka 1d na 28d ka a tụrụ n'otu n'otu.
2 Nsonaazụ na mkparịta ụka
2.1 Mmetụta nke ọdịnaya gypsum ntụ ntụ na akụrụngwa akụrụngwa nke plasta dị fechaa desulfurization gypsum
Ngụkọta ego nke ntụ ntụ gypsum, ntụ ntụ limestone na nchịkọta dị arọ bụ 100%, na ọnụ ọgụgụ nke nchịkọta ọkụ a kapịrị ọnụ na admixture na-agbanwe agbanwe. Mgbe ọnụọgụ gypsum ntụ ntụ bụ 60%, 70%, 80%, na 90%, desulfurization nsonaazụ nke ike mgbanwe na mkpakọ nke ngwa agha gypsum.
Ike mgbanwe na ike mkpakọ nke ìhè plastered desulfurized gypsum Mortar na-abawanye na afọ, na-egosi na ogo hydration nke gypsum na-etowanye karịa ka ọ dị afọ. Site na mmụba nke gypsum ntụ ntụ desulfurized, ike na-agbanwe agbanwe na ike mkpakọ nke plasta gypsum dị fechaa gosipụtara usoro elu n'ozuzu ya, mana mmụba dị ntakịrị, na ike mkpakọ na ụbọchị 28 pụtara ìhè karịsịa. Na 1d afọ, ike mgbanwe nke gypsum ntụ ntụ jikọtara na 90% mụbara site na 10.3% ma e jiri ya tụnyere nke 60% gypsum ntụ ntụ, na ike mkpakọ kwekọrọ na-abawanye site na 10.1%. Mgbe ọ dị afọ 28, ike ike nke gypsum ntụ ntụ jikọtara ya na 90% mụbara site na 8.8% ma e jiri ya tụnyere nke gypsum ntụ ntụ jikọtara ya na 60%, na ike mkpakọ kwekọrọ na-abawanye site na 2.6%. Iji chịkọta ọnụ, enwere ike ikwubi na ọnụọgụ gypsum ntụ ntụ na-enwe mmetụta dị ukwuu na ike mgbanwe karịa ike mkpakọ.
2.2 Mmetụta nke mkpokọta mkpokọta dị fechaa na akụrụngwa nke gypsum desulfurized plastered dị fechaa.
Ọnụ ego gypsum ntụ ntụ, ntụ ntụ limestone na nchịkọta dị arọ bụ 100%, na ọnụọgụ gypsum ntụ ntụ na admixture na-agbanwe agbanwe. Mgbe ọnụọgụ nke microbeads vitrified bụ 4%, 8%, 12% na 16%, plasta ìhè nsonaazụ nke ike mgbanwe na mkpakọ nke ngwa agha gypsum desulfurized.
N'otu afọ ahụ, ike mgbanwe na ike mkpakọ nke ìhè plastered desulfurized gypsum motar belatara site na mmụba nke ọdịnaya nke microbeads vitrified. Nke a bụ n'ihi na ihe ka ọtụtụ n'ime microbeads vitrified nwere oghere dị n'ime ma ike nke ha dị ala, nke na-ebelata ike mgbanwe na mkpakọ nke plasta gypsum dị arọ. Na 1d afọ, ike mgbanwe nke 16% gypsum ntụ ntụ belata site na 35.3% ma e jiri ya tụnyere nke 4% gypsum ntụ ntụ, na ike mkpakọ kwekọrọ na-ebelata site na 16.3%. Mgbe ọ dị afọ 28 ụbọchị, ike mgbanwe nke 16% gypsum ntụ ntụ belata site na 24.6% ma e jiri ya tụnyere nke 4% gypsum ntụ ntụ, ebe ike mkpakọ kwekọrọ na-ebelata naanị 6.0%. Iji chịkọta ọnụ, enwere ike ikwubi na mmetụta nke ọdịnaya nke microbeads vitified na ike mgbanwe dị ukwuu karịa na ike mkpakọ.
2.3 Mmetụta nke ọdịnaya retarder na ịtọ oge nke gypsum desulfurized nke ọkụ plastered
Ngụkọta usoro ọgwụgwọ gypsum ntụ ntụ, ntụ ntụ limestone na mkpokọta dị arọ bụ 100%, na usoro ọgwụgwọ gypsum ntụ ntụ, ntụ ntụ limestone, mkpokọta dị arọ na cellulose ether na-agbanwe agbanwe. Mgbe usoro onunu ogwu nke sodium citrate bụ 0, 0.1%, 0.2%, 0.3 %, mwube oge nsonaazụ nke ìhè plastered desulfurized gypsum ngwa agha.
Oge nhazi mbụ na oge nhazi ikpeazụ nke ọkụ plastered desulfurized gypsum motar abụọ na-abawanye site na mmụba nke ọdịnaya sodium citrate, mana mmụba nke nhazi oge dị ntakịrị. Mgbe ọdịnaya sodium citrate bụ 0.3%, oge ntọala mbụ na-agbatị 28min, ma ogologo oge nhazi ikpeazụ bụ nkeji 33. Ịgbatị oge nhazi ahụ nwere ike ịbụ n'ihi nnukwu elu nke gypsum desulfurized, nke nwere ike ịmịnye retarder gburugburu gypsum particles, si otú ahụ belata mgbasa nke gypsum na-egbochi crystallization nke gypsum, na-akpata enweghị ike nke gypsum slurry. iji guzobe usoro nhazi siri ike. Gbatịkwuo oge nhazi nke gypsum.
2.4 Mmetụta nke cellulose ether ọdịnaya na akụrụngwa nke gypsum desulfurized plastered dị fechaa.
Ngụkọta usoro ọgwụgwọ gypsum ntụ ntụ, ntụ ntụ limestone na nchịkọta dị fechaa bụ 100%, na usoro ọgwụgwọ gypsum ntụ ntụ, ntụ ntụ limestone, mkpokọta dị arọ na retarder na-agbanwe agbanwe. Mgbe usoro onunu ogwu nke hydroxypropyl methylcellulose bụ 0, 0.1%, 0.2% na 0.4%, ike mgbanwe na mkpakọ na-arụpụta nke ìhè plastered desulfurized gypsum ngwa agha.
Na afọ 1d, ike mgbanwe nke ìhè plastered desulfurized gypsum motar mbụ mụbara wee belata site na mmụba nke ọdịnaya hydroxypropyl methylcellulose; na 28d afọ, ike mgbanwe nke ìhè plastered desulfurized gypsum motar Site na mmụba nke ọdịnaya nke hydroxypropyl methylcellulose, ike na-agbanwe agbanwe gosipụtara usoro nke mbụ na-ebelata, mgbe ahụ na-abawanye ma na-ebelata. Mgbe ọdịnaya nke hydroxypropyl methylcellulose bụ 0.2%, ike mgbanwe na-erute kacha, ma karịa ike kwekọrọ ekwekọ mgbe ọdịnaya nke cellulose bụ 0. N'agbanyeghị afọ 1d ma ọ bụ 28d, ike mkpakọ nke ìhè plastered desulfurized gypsum ngwa agha na-ebelata. mmụba nke ọdịnaya hydroxypropyl methylcellulose, na usoro ọdịda kwekọrọ na ya na-apụta ìhè karịa 28d. Nke a bụ n'ihi na ether cellulose nwere mmetụta nke njide mmiri na ịgbatị, na ọchịchọ nke mmiri maka nhazi ọkọlọtọ ga-abawanye site na mmụba nke cellulose ether ọdịnaya, na-eme ka mmụba nke mmiri-ciment ruru nke slurry nhazi, si otú ahụ na-ebelata ike. nke ụdị gypsum.
3 Nkwubi okwu
(1) Ogo hydration nke gypsum desulfurized na-aghọ nke zuru oke na afọ. Site na mmụba nke ọdịnaya gypsum ntụ ntụ desulfurized, ike mgbanwe na ike mkpakọ nke plasta gypsum dị fechaa gosipụtara usoro elu n'ozuzu ya, mana mmụba dị ntakịrị.
(2) Site na mmụba nke ọdịnaya nke microbeads vitrified, ike na-agbanwe agbanwe na ike mkpakọ nke ngwa ngwa plastered desulfurized gypsum nke dị arọ na-ebelata, mana mmetụta nke ọdịnaya nke microbeads vitrified na ike mgbanwe dị ukwuu karịa nke ike mkpakọ. ike.
(3) Site na mmụba nke ọdịnaya sodium citrate, oge ntọala mbụ na oge nhazi ikpeazụ nke ìhè plastered desulfurized gypsum mortar na-agbatị ogologo oge, ma mgbe ọdịnaya nke sodium citrate dị ntakịrị, mmetụta na ịtọ oge adịghị anya.
(4) Site na mmụba nke ọdịnaya hydroxypropyl methylcellulose, ike mkpakọ nke ìhè plastered desulfurized gypsum ngwa agha na-ebelata, ma ike mgbanwe na-egosi na a na-emekarị nke mbụ na-abawanye ma na-ebelata na 1d, na na 28d Ọ na-egosi na-emekarị nke na-ebelata mbụ, mgbe ahụ. na-abawanye na mgbe ahụ na-ebelata.
Oge nzipu: Feb-02-2023