DETULFURIZATION YIZA YIZA NA LIME / LIMESTONE SLURRY

Ibiranga

• Desulphurisation ikora neza hejuru ya 99% irashobora kugerwaho
• Kuboneka hejuru ya 98% birashobora kugerwaho
• Ubwubatsi ntabwo bushingiye ahantu runaka
• Ibicuruzwa bicuruzwa
• Igikorwa cyo kugabanya imitwaro itagira imipaka
• Uburyo hamwe numubare munini wibisobanuro kwisi

Ibyiciro

Inzira zingenzi zuburyo bwubu buryo bwa desulphurisation ni:

• Gutegura nabi no kunywa
• Gukuraho SOx (HCl, HF)
• Kuvomera amazi no gutunganya ibicuruzwa

Muri ubu buryo, hekeste (CaCO3) cyangwa igihe cyihuse (CaO) irashobora gukoreshwa nkuwinjiza. Guhitamo inyongeramusaruro ishobora kongerwaho byumye cyangwa nkibishishwa bikozwe hashingiwe kumishinga yihariye imipaka. Kugira ngo ukureho okiside ya sulfure (SOx) hamwe n’ibindi bigize aside (HCl, HF), gaze ya flue izanwa cyane cyane nigituba kirimo inyongeramusaruro muri zone yinjira. Muri ubu buryo, ubuso bunini bushoboka bushoboka kuboneka kubwinshi. Mu karere kinjirira, SO2 iva mu kirere ya flue ikora hamwe niyinjira kugirango ikore calcium sulphite (CaSO3).

Amabuye ya hekeste arimo calcium sulphite yakusanyirijwe mumashanyarazi. Urutare rukoreshwa mugusukura imyuka ya flue rwongerwaho ubudahwema kumashanyarazi kugirango ubushobozi bwisuku bwimyanda bugume buhoraho. Ibishishwa noneho bisubizwa mukarere ka sisitemu.

Muguhumeka umwuka mumashanyarazi, gypsumu ikorwa muri calcium sulphite kandi ikurwa mubikorwa nkigice cya slurry. Ukurikije ubuziranenge bwibisabwa kubicuruzwa byarangiye, ubundi buvuzi burakorwa kugirango habeho gypsumu igurishwa.

Ubwubatsi bw'ibihingwa

Muri gaz flul gaz desulphurisation, ibyuma bifata umunara wa spray byatsinze bigabanijwemo ibice bibiri byingenzi. Aka ni agace kinjizwamo gazi ya flue hamwe na sompe ya sisitemu, aho urutare rwa hekeste rufashwe hanyuma rugakusanywa. Kugirango wirinde kubitsa mumashanyarazi, slurry ihagarikwa hakoreshejwe uburyo bwo kuvanga.

Gazi ya flue itembera mumashanyarazi hejuru yurwego rwamazi hanyuma ikanyura muri zone yinjira, igizwe nurwego rwinshi rwo gutera no gukuraho ibicu.

Amabuye ya hekeste yakuwe mu cyuma gikurura ibintu yatewe neza hamwe na hamwe kugeza kuri gaze ya flue binyuze murwego rwo gutera. Gutondekanya amajwi mu munara utera ni ngombwa cyane kugirango ikureho neza. Gukwirakwiza neza rero birakenewe cyane. Mu gukuraho ibicu, ibitonyanga bitwarwa mukarere ka sisitemu na gaze ya flue bisubizwa mubikorwa. Ku isohoka ry’imashini, gaze isukuye iruzuye kandi irashobora gukurwaho biturutse ku munara ukonje cyangwa ahantu hatose. Ubundi, gaze isukuye irashobora gushyuha no kuyoherezwa ahantu humye.

Ibishishwa byavanywe mu cyuma gikurura amazi bigenda byangirika hakoreshejwe hydrocyclone. Mubisanzwe iyi pre-concentrated slurry irushijeho kuba amazi binyuze mu kuyungurura. Amazi yabonetse muriki gikorwa, arashobora gusubizwa ahanini mumashanyarazi. Igice gito cyakuweho muburyo bwo gutembera muburyo bwo gutemba kwamazi.

Flue gaz desulphurisation mu nganda zinganda, inganda zamashanyarazi cyangwa uruganda rutwika imyanda biterwa na nozzles zitanga imikorere neza mugihe kirekire kandi zihanganira ibidukikije bikabije. Hamwe na sisitemu ya nozzle, Lechler itanga ibisubizo byumwuga kandi bigakoreshwa muburyo bwo gutera imiti ya spray scrubbers cyangwa imiti ikurura spray kimwe nubundi buryo bwo gukora flue gaz desulphurisation (FGD).

Kuzimya amazi