Hukumar mai a cikin gidan mai a cikin gida tsara iko samar da sharar gida, kamar su kasa da kuma tashi ash, da kuma gas mai gas wanda aka fitar da yanayi. Ana buƙatar tsire-tsire da yawa don cire ɓoyayyen sox daga gas mai amfani da tsarin gas na Desulfurization (FGD). Kwararrun fasahar FGD na uku da aka yi amfani da su a cikin Amurka suna da rigar goge (85% na shigarwa), bushe goge (12%), da kuma bushewar sorbent (3%). Rigar scrubbrial yawanci cire sama da 90% na sox, idan aka kwatanta da bushe fasahar, wanda ke cire kashi 80%. Wannan labarin ya gabatar da fasahar-fasahar fasaha don kula da sharar gida wanda aka samar da rigarTsarin FGD.
Rigar FGD
Rigar FGD fasahar da aka saba da sashe na slurry reactor da daskararru na lalata sashe. An yi amfani da nau'ikan nau'ikan masu ɗaukar hankali da yawa, gami da hasumiya da tuddai masu tuddai, Venturi scrubbubs, da kuma fesa scrubbubs a cikin reactor sashe. Mai amfani yana hana mallakar acidic tare da alkaline slurry na lemun tsami, sodium hydroxide, ko farar wuta. A sau da yawa dalilan tattalin arziki, sabbin scruxers suna iya amfani da farar ƙasa slurry.
A lokacin da fari na ruwa ya yi wasa da sox a cikin rage yanayin abubuwan sha, don haka 2 (Babban bangaren sox) an canza shi cikin sulfite, kuma an samar da slurry mawadaci a cikin sulfite an samar. A farkon tsarin tsarin hadawa (a matsayin hadin hada hadaka na halitta ko hana tsarin oxidanation na oxidation) ya samar da sulfite sulfite ta-samfurin. SaboTsarin FGDYi amfani da kayan haɗi da iskar shaye-shaye wanda a cikin abin da aka canza slurry slurry na sulfate (Gypsum); Ana magana da waɗannan a matsayin jememone na lalata iskar shaka (lsfo) tsarin fgd.
Tsarin tsarin LSFO na zamani na zamani yana amfani da hasumiyar feshin abu mai ɗorewa tare da tsarin iskar shaye-shex tare da tsarin harkar (Hoto 1) ko kuma tsarin jet mai betbler. A cikin kowane gas yana cikin wani yanki mai narkewa a ƙarƙashin yanayin otexic; The slurry sannan ya wuce zuwa wani reactor reactor ko yankin amshe, in da sulfite ya canza zuwa sulfate, da gypsum precipites. Lokacin tsare hydraulic a cikin iskar shaye-shaye shine kimanin minti 20.
1. SPRAY POREMN Dememone da iskar shaka (lsfo) tsarin fgd. A cikin wani lsfo goge slrubber slurrry yana wucewa mai martaba, inda aka ƙara iska don tilasta ocfuding na sulfite don sulfate. Wannan hadaka tazambuwa ta bayyana don canza Selenite zuwa Senenate, sakamakon haifar da matsalolin jiyya na gaba. Source: Ch2m Hill
Wadannan tsarin suna aiki da aiki tare da daskararren raunuka na 14% zuwa 18%. Dakatar da daskararru ya ƙunshi kyau da m gypsum daskararru, tashi ash, da kuma kayan aiki da ba a ciki tare da dutsen. Lokacin da daskararru ya kai iyaka, slurry ya tsarkaka. Yawancin tsarin tsarin LSFO FGD suna amfani da tsayar da daskararru na kayan masarufi da na numfashi don raba gypsum da sauran daskararren ruwa (Hoto na 2).
2. Fgd purge na gypsum tsarin. A cikin misalin gypsum na gypsum na tsarin tsarin kayan masarufi a cikin tsarkake an rarrabe shi, ko rabuwa, cikin m da kyawawan comptions. An raba barbashi mai kyau a cikin hydroclone daga hydroclone don samar da wani farin lu'ulu'u lu'ulu'u (don siyarwa) wanda za'a iya lalata shi zuwa tsarin danshi na numfashi. Source: Ch2m Hill
Wasu tsarin fgd suna amfani da madaidaici ko daidaita tafkuna don rarrabewar daskararru da na ruwa, kuma wasu sabbin tsarin suna amfani da hydroclones da injin amfani da beluum. Wasu na iya amfani da hydrocles biyu a cikin jerin don ƙara cire daskararru a cikin tsarin numfashi. Za'a iya dawo da rabo daga hydroclone ya sake dawowa zuwa tsarin FGD don rage kwarara mai shayarwa.
Purging may also be initiated when there is a buildup of chlorides in the FGD slurry, necessitated by limits imposed by the corrosion resistance of the FGD system's construction materials.
FGD halaye na shayarwa
Abubuwa da yawa suna shafar tsarin ɓoyayyen asarar ruwa, kamar tsarin Lemunstone, nau'in mai goge-goge, da tsarin demeum-na ruwa da aka yi amfani da shi. Molddinin din na acidic - kamar chlawies, fitsari, da sulfate, ciki da kuma metals, mercury, selenium, boron, cadmium, da zinc. Jirgin ruwan yana ba da baƙin ƙarfe da aluminium (daga ma'adanai na yumbu) ga sharar gida. Lememone da yawanci an cire shi a cikin wani rigar ball Mill, da kuma lalacewa da lalata da kwallaye suna ba da ƙarfe zuwa ga farar fata slurry. Clays lanna bayar da gudummawar teres na INGES, wanda yake daya daga cikin dalilan da aka tsarkake sharar gida daga goge.
Daga: Thomas E. Higgins, Phd, PE; A. Thomas Sandy, PE; da Sila W. yana ba da, PE.
Email: caroline@rbsic-sisic.com
Lokaci: Aug-04-2018