Kupararira kwehukuru hwezvimedu zve coke mbishi kunokanganisa sei kupenya kwechinhu uye kufanana kwe calcination mu rotary kiln?

Kuwanda kwemhedzisiro yekugoverwa kwehukuru hwezvimedu zve coke pahuwandu hwekuyerera kwechikamu chezvinhu uye kufanana kwe calcination muchoto chinotenderera kunogona kuongororwa kuburikidza nehukama huripo pakati pezvikamu zvehukuru hwezvimedu uye zviratidzo zvemaitiro seizvi:

I. Kuwanda kweKupararira kweSaizi yeZvidimbu paKupinda kweChinhu

Kufanana kweSaizi yeChidimbu (PDI Kukosha)

• Tsanangudzo: Particle size distribution distribution index (PDI = D90/D10, apo D90 iri saizi yesefa iyo 90% yezvikamu inopfuura, uye D10 iri saizi yesefa iyo 10% yezvikamu inopfuura).
• Maitiro Ekuchinja:
  Kukosha kudiki kwePDI (zvinoratidza saizi yezvikamu zvakafanana) kunotungamira kune porosity yakakwira yechikamu chezvinhu, ne permeability index (K kukosha) ichiwedzera neinenge 15% kusvika 20%.
• Ruzivo rweKuedza:
  Kana PDI yadzikira kubva pa2.0 kusvika pa1.3, kuderera kwedzvinyiriro mukati mechoto kunodzikira ne22%, uye mwero wekufamba kwegasi unowedzera ne18%, zvichiratidza kuvandudzika kukuru mukubvumidzwa kwemvura.
• Maitiro:
  Kukura kwezvikamu zvakafanana kunoderedza chiitiko chekuti zvikamu zvidiki zvinozadza mipata iri pakati pezvikamu zvikuru, zvichidzivirira "kuvharira zvikamu" uye nokudaro zvichideredza kuramba kwemhepo.

Zviri Mukati Mezvidimbu Zvidiki (<0.5 mm)

• Nzvimbo Yakakosha:
  Kana chikamu chezvidimbu zvidiki zvikadarika 10%, kuyerera kwemvura kunowedzera kuipa zvakanyanya.
• Hukama Hwehuwandu:
  Pakuwedzera kwega kwega kwe5% kwezvidimbu zvidiki, kuderera kwekumanikidzwa mukati mechoto kunokwira neinenge 30%, uye mwero wekuyerera kwegasi unoderera ne25%.
• Chidzidzo Chenyaya:
  Muchitofu chemafuta epetroleum coke calcination, kana huwandu hwezvinhu zvidiki hukawedzera kubva pa8% kusvika pa15%, kumanikidzwa kusina kunaka pamusoro pechitofu kunokwira kubva pa -200 Pa kusvika pa -350 Pa, zvichiita kuti simba refeni riwedzere kuti rirambe richishanda, zvichikonzera kuwedzera kwe12% mukushandiswa kwesimba.

Avhareji yeSaizi yeZvidimbu (D50)

• Range Yakakodzera:
  Kupinda kwemvura kwakanyanya kunowanikwa kana D50 iri pakati pe8 ne15 mm.
• Mhedzisiro Yekutsauka:
  Kana D50 iri pasi pe5 mm, porosity yechikamu chezvinhu inoderera kusvika pasi pe35%, uye permeability index inoderera ne40%;
  Kana D50 ikadarika 20 mm, kunyangwe porosity yakakwira, nzvimbo yekubatana pakati pezvikamu inoderera, zvichideredza kushanda kwekupisa ne15% uye zvichikanganisa zvisina kunanga kufanana kwe calcination.

II. Kuwanda kweKupararira kweSaizi yeParticles paKufanana kweCalcination

Kutsauka Kwakajairika Kwekupararira Kwekupisa (σT)

• Tsanangudzo:
  Chiratidzo chenhamba chekuchinja-chinja kwehukuru hwetembiricha ye axial mukati mehorni, ne σT diki ichiratidza calcination yakafanana.
• Kukanganiswa kweSaizi yeChidimbu:
  Kana saizi yezvikamu yakaenzana (PDI < 1.5), σT inogona kudzorwa mukati me ±15℃;
  Kana saizi yezvikamu isiri yakafanana (PDI > 2.5), σT inowedzera kusvika ±40℃, zvichikonzera kupiswa zvakanyanya munzvimbo iyoyo kana kupiswa zvishoma.
• Chidzidzo Chenyaya:
  Muchoto chealuminium carbon rotary, nekuvandudza kugoverwa kwehukuru hweparticle kuti kuderedzwa kwePDI kubva pa2.8 kusvika pa1.4, kutsauka kwakajairwa kwehuwandu hwevolatible muzvigadzirwa kunoderera kubva pa0.8% kusvika pa0.3%, zvichivandudza zvakanyanya kufanana kwe calcination.

Kufamba Kwepamberi Kwechiito Kumhanya (Vr)

• Tsanangudzo:
  Kumhanya kwekufambisa kwechikamu che calcination reaction muchikamu chezvinhu, zvichiratidza kushanda zvakanaka kwe calcination.
• Kubatana neSaizi yeParticle:
  Pakuwedzera kwe10% kwechikamu chezvidimbu zvidiki (<3 mm), Vr inowedzera neinenge 25%, asi inowanzo kukonzera maitiro anokurumidza uye kupisa zvakanyanya munzvimbo iyoyo;
  Pakuwedzera kwe10% kwechikamu chezvikamu zvakakora (>20 mm), Vr inoderera ne15% nekuda kwekuwedzera kwekudzivirira kupisa.
• Nzvimbo yeKuenzana:
  Kana kugoverwa kwehukuru hwezvikamu kuri bimodal (semuenzaniso, musanganiswa wezvikamu zve3-8 mm uye 15-20 mm), Vr inogona kuchengetedzwa mukati mehuwandu hwakakodzera (0.5-1.0 mm/min) uku ichivimbisa kufanana.

Mwero weKukodzera Chigadzirwa (Q)

• Hukama Hwehuwandu:
  Pakuwedzera kwega kwega kwemayuniti 0.5 muhukuru hwezvikamu zvakafanana (kureva, kudzikira kwehuwandu hwePDI), chiyero chekukosha kwechigadzirwa chinowedzera neinenge 8%;
  Pakudzikira kwega kwega kwe5% kwehuwandu hwezvinhu zvidiki, huwandu hwemarara hunokonzerwa nekupiswa zvakanyanya kana kupiswa zvakanyanya hunoderera ne12%.
• Ruzivo rweMaindasitiri:
  Muchoto chinotenderera chetitanium dioxide, nekudzora saizi yezvikamu zvecoke yezvinhu zvisina kucheneswa (D50 = 12 mm, PDI = 1.6), kucheneswa kwechigadzirwa kunoderera kubva pa1.2 kusvika pa0.5, uye mwero wechigadzirwa chegiredhi rekutanga unokwira kubva pa75% kusvika pa92%.

III. Mazano Ekugadzirisa Zvakakwana

Zvinangwa zveKudzora Saizi yeZvidimbu:

• D50: 8-15 mm (inogadziriswa zvichienderana nehunhu hwezvinhu);
• PDI: <1.5;
• Hunhu hwechinhu chakatsetseka (<0.5 mm): <8%.

Maitiro Ekugadzirisa Maitiro:

• Shandisa maitiro ekupwanya nekuongorora zvidimbu zvakasiyana-siyana kuti uve nechokwadi chekupararira kwehukuru hwezvidimbu zvakasanganiswa;
• Ita mushonga wekugadzirira usati wagadzira (semuenzaniso, kugadzira briquetting) pazvidimbu zvidiki kuti uderedze kurasikirwa nemhepo inobhururuka;
• Gadzirisa kukura kwezvikamu zvichienderana nerudzi rwechitofu (hurefu kusvika padhayamita, kumhanya kwekutenderera), semuenzaniso, uchishandisa zvikamu zvakaoma sechikamu chikuru chemachitofu marefu uye kuwedzera nezvimedu zvidiki zvemachitofu mapfupi.

Kuongorora uye Mhinduro:

• Isai ma "particle size analyzers" epamhepo kuti muone kupararira kweparticle size yezvinhu zviri kupinda muchoto panguva chaiyo;
• Sanganisa pamwe chete nekushandisa komputa yekufananidza fluid dynamics (CFD) yenzvimbo yekupisa mukati mechoto kuti ugadzirise parameters yehukuru hweparticle uye calcination regime.