Coal Dej Slurry
I. Lub cev muaj zog thiab muaj nuj nqi
Coal-dej slurry yog slurry ua los ntawm cov thee, dej thiab me me ntawm cov tshuaj additives. Raws li lub hom phiaj, thee-dej slurry yog muab faib ua high-concentration thee-dej slurry roj thiab thee-dej slurry rau Texaco furnace gasification. Coal-dej slurry tuaj yeem nqus tau, atomized, khaws cia thiab ignited thiab hlawv nyob rau hauv ib qho kev ruaj khov. Kwv yees li 2 tons ntawm thee-dej slurry tuaj yeem hloov 1 tuj roj roj.
Coal-dej slurry rau kev kub hnyiab outperforms nyob rau hauv high-combustion efficiency, lub zog txuag thiab ib puag ncig cov txiaj ntsig, ib feem tseem ceeb ntawm cov thee huv si technology. Coal-dej slurry tuaj yeem thauj mus los ntev los ntawm kev thauj mus los ntawm cov kav dej nrog kev nqis peev tsawg thiab cov nqi khiav haujlwm tsawg. Nws tuaj yeem raug hlawv ncaj qha yam tsis muaj lub cev qhuav dej tom qab tuaj txog ntawm lub davhlau ya nyob twg, thiab cov txheej txheem khaws cia thiab kev thauj mus los tau raug kaw tag nrho.
Dej yuav ua rau kub poob thiab tsis tuaj yeem tsim cov cua sov hauv cov txheej txheem combustion. Yog li ntawd, qhov concentration ntawm cov thee yuav tsum mus txog qib siab - 65 ~ 70% feem ntau. Cov tshuaj ntxiv yog kwv yees li 1%. Qhov kub poob los ntawm cov dej suav txog li 4% ntawm tus nqi calorific ntawm cov thee-dej slurry. Dej yog ib qho khoom siv uas tsis tuaj yeem nyob hauv gasification. Los ntawm qhov kev pom no, cov thee concentration tuaj yeem txo qis mus rau 62% ~ 65%, uas tuaj yeem ua rau muaj peev xwm nce cov pa oxygen.
Txhawm rau ua kom yooj yim rau kev sib tsoo thiab kev tawm tsam gasification, thee-dej slurry muaj qee qhov yuav tsum tau ua rau cov thee fineness. Lub sab sauv txwv ntawm qhov loj me me ntawm cov thee-dej slurry rau roj (qhov loj me me nrog tus nqi dhau tsis tsawg dua 98%) yog 300μm, thiab cov ntsiab lus tsawg dua 74μm (200 mesh) tsis tsawg dua 75%. Qhov zoo ntawm cov thee-dej slurry rau gasification yog me ntsis coarser dua li cov thee-dej slurry rau roj. Lub sab sauv txwv ntawm qhov loj me yog tso cai kom ncav cuag 1410μm (14 mesh), thiab cov ntsiab lus tsawg dua 74μm (200 mesh) yog 32% mus rau 60%. Txhawm rau ua kom cov thee-dej slurry yooj yim rau cov twj tso kua mis thiab atomize, cov thee-dej slurry kuj muaj qhov yuav tsum tau ua kom muaj dej.
Nyob rau hauv chav tsev kub thiab ib tug shear npaum li cas ntawm 100s, qhov pom tseeb viscosity feem ntau yuav tsum tsis txhob siab tshaj 1000-1500mPas. Cov thee-dej slurry siv nyob rau hauv kev thauj mus los ntawm cov kav xa dej mus ntev yuav tsum muaj qhov pom tseeb viscosity tsis pub ntau tshaj 800mPa·s nyob rau hauv qhov kub thiab txias (qhov kub tshaj plaws ntawm lub xyoo rau cov kav dej faus hauv av) thiab tus nqi shear ntawm 10s-1. Tsis tas li ntawd, nws tseem yuav tsum tau hais tias cov thee-dej slurry muaj qis viscosity thaum nws nyob hauv lub xeev ntws, uas yooj yim rau kev siv; Thaum nws nres ntws thiab nyob rau hauv lub xeev zoo li qub, nws tuaj yeem pom cov viscosity siab rau kev khaws cia yooj yim.
Kev ruaj ntseg ntawm cov roj-dej slurry thaum lub sij hawm cia thiab kev thauj mus los yog ib qho tseem ceeb heev, vim hais tias thee-dej slurry yog ib qho kev sib xyaw ntawm cov khoom thiab cov theem ua kua, thiab nws yog ib qho yooj yim los cais cov khoom thiab cov kua, yog li nws yuav tsum tsis txhob "nyuaj nag" yog tsim thaum lub sij hawm cia thiab thauj. Lub npe hu ua "nyuaj nag lossis daus" yog hais txog cov nag lossis daus uas tsis tuaj yeem rov qab los rau nws lub xeev qub los ntawm kev nplawm cov thee-dej slurry. Lub peev xwm ntawm thee-dej slurry los tswj cov kev ua tau zoo ntawm tsis tsim cov nag lossis daus yog hu ua "stability" ntawm thee-dej slurry. Coal-dej slurry nrog kev ruaj ntseg tsis zoo yuav cuam tshuam rau kev tsim khoom thaum nag lossis daus tshwm sim thaum khaws cia thiab kev thauj mus los.
II. Txheej txheem cej luam ntawm Coal-Dej Slurry Preparation Technology
Coal-dej slurry yuav tsum muaj cov thee siab concentration, nplua particle loj, zoo fluidity, thiab zoo stability kom tsis txhob hnyav nag lossis daus. Nws yuav nyuaj rau ua kom tau raws li tag nrho cov khoom saum toj no tib lub sijhawm, vim qee qhov ntawm lawv muaj kev sib koom ua ke. Piv txwv li, nce qhov concentration yuav ua rau lub viscosity nce thiab fluidity mus deteriorate. Zoo fluidity thiab viscosity tsawg yuav ua rau lub stability tsis zoo. Yog li ntawd, nws yog ib qho tsim nyog los saib xyuas cov concentration hauv lub sijhawm tiag tiag. CovLonnmeterhandheld density metermuaj qhov tseeb txog li 0.003 g / ml, uas tuaj yeem ua tiav qhov ntsuas qhov ceev thiab tswj tau qhov ceev ntawm slurry.
1. Xaiv qhov Raw Coal rau Pulping
Ntxiv rau qhov ua tau raws li qhov yuav tsum tau ua ntawm cov neeg siv qis qis, qhov zoo ntawm cov thee rau pulping yuav tsum tau them sai sai rau nws cov khoom pulping - qhov nyuaj ntawm pulping. Qee cov coals yog ib qho yooj yim los ua kom muaj siab-concentration thee-dej slurry nyob rau hauv ib txwm muaj. Rau lwm cov coals, nws yog ib qho nyuaj los yog yuav tsum tau ib tug complex pulping txheej txheem thiab tus nqi siab dua los ua high-concentration thee-dej slurry. Lub zog pulping ntawm raw cov ntaub ntawv rau pulping muaj kev cuam tshuam zoo rau kev nqis peev, cov nqi tsim khoom thiab qhov zoo ntawm cov thee-dej slurry ntawm cov nroj tsuag pulping. Yog li ntawd, txoj cai ntawm thee pulping zog yuav tsum tau mastered, thiab cov thee raw rau pulping yuav tsum tau xaiv raws li qhov tseeb xav tau thiab cov hauv paus ntsiab lus ntawm technical feasibility thiab economic rationality.
2. Qib
Coal-dej slurry tsis tsuas yog yuav tsum tau cov thee particle loj kom ncav cuag qhov kev nplua nuj, tab sis kuj yuav tsum tau muaj cov khoom loj me me, kom cov khoom siv sib txawv tuaj yeem sau ib leeg, txo qhov khoob ntawm cov khoom siv hluav taws xob, thiab ua tiav "stacking efficiency". Tsawg qhov sib txawv tuaj yeem txo cov dej siv, thiab nws yooj yim los ua kom muaj cov pa roj-dej slurry. Cov tshuab no qee zaum hu ua "kev muab qhab nia".
3. Pulping txheej txheem thiab khoom siv
Raws li cov khoom siv raw ntawm cov khoom siv me me thiab cov yam ntxwv sib tsoo, yuav ua li cas kom cov khoom loj me me ntawm cov khoom siv roj av slurry ua tiav ntau dua "stacking efficiency" yuav tsum muaj kev xaiv tsim nyog ntawm cov khoom sib tsoo thiab cov txheej txheem pulping.
4. Xaiv Kev Ua Haujlwm-Matching Additives
Txhawm rau ua kom cov thee-dej slurry ua tiav siab concentration, tsis muaj viscosity, thiab zoo rheology thiab stability, me me ntawm cov tshuaj, hu ua "additives", yuav tsum tau siv. Cov molecules ntawm cov additive ua nyob rau hauv lub interface ntawm thee particles thiab dej, uas yuav txo tau viscosity, txhim kho cov dispersion ntawm thee hais nyob rau hauv dej, thiab txhim kho stability ntawm thee-dej slurry. Tus nqi ntawm cov additives feem ntau yog 0.5% mus rau 1% ntawm cov nyiaj thee. Muaj ntau ntau yam khoom siv ntxiv, thiab cov qauv tsis raug kho thiab yuav tsum tau txiav txim siab los ntawm kev sim kev tshawb fawb.
Post lub sij hawm: Feb-13-2025
