Plansifter no ne ade titiriw, ɔfã a wɔyam wɔ nnɛyi esiam afiri mu no koma. Sɛ roller mill no ne "crushing expert" a, ɛnde plansifter no ne "master of precision separation." Sɛnea wɔde di dwuma no na ɛkyerɛ esiam a woyi fi mu, aba a wonya, nneɛma a wɔyɛ no yiye, ne sɛnea nneɛma a wɔyɛ no gyina pintinn wɔ owiyammo no nyinaa mu no tẽẽ.
I. Nnwuma Titiriw: Sifting ne Grading
Adwuma titiriw a plansifter no yɛ ne sɛ ɔbɛkɔ so, ayɛ no yiye, na wayɛ no pɛpɛɛpɛ na wayɛ afrafrade a efi roller mills a ɛyɛ nneɛma nketenkete a ɛsono ne kɛse a esiam, bran, ne endosperm ka ho no mu.
Esiam a Wɔawie a Woyi:Nneɛma nketenkete a eye sen biara a ɛne esiam ho nsɛm hyia a wɔbɛtetew afi afrafrade a wɔde bɛmena sɛ ade a wɔawie no mu akɔ ɔfã a edi hɔ no mu.
Mfinimfini Stocks a Wɔde Di Dwuma:Nneɛma akɛse a ennya nyɛɛ fɛ yiye a wɔbɛkyekyɛ mu ayɛ no grade ahorow a egyina ne kɛse ne ne su so (sɛ nhwɛso no, bran a ɛwɔ mu). Saa nnuan ahorow yi bi ne esiam a ɛyɛ mmerɛw (dunst), semolina, middlings, ne bran.
Adeyɛ no Nsuo a Wɔde Besi hɔ:Wɔde stock biara a wɔahyɛ no agyirae no kɔ ne mfiri a edi hɔ a wɔakyerɛ no so pɛpɛɛpɛ wɔ adeyɛ no mu (te sɛ roller mills anaa purifiers ahorow), na wɔnam saayɛ so ayɛ milling nhyehyɛe no nyinaa a ɛkyinkyini no.
II. Gyinabea ne Dwuma a Edi wɔ Flour Mill Flow Sheet no mu
Plansifter no nyɛ adwuma wɔ baabi a atew ne ho. Wɔde abɔ mu ne roller mills ma ɛyɛ "grinding-sifting" units. Wɔnam akuw a ɛtete saa pii a wɔde bom nnidiso nnidiso so na ɛbɔ milling nhyehyɛe no nyinaa.
Adeyɛ a Wɔtaa Yɛ:
Roller Mill (Grinding) → Plansifter (Sifting & Grading) → Graded Stocks → Wɔde kɔma nea edi hɔ a wɔakyerɛ sɛ Roller Mill anaa Purifier → Reground → Hyehyɛ Plansifter a edi hɔ no mu...
Saa kyinhyia yi san yɛ bio, na ɛde nkakrankakra twitwiw endosperm no fi bran no mu na ɛtew so ma ɛbɛyɛ esiam.
Nhyehyɛe no Nhyehyɛe:Wɔ esiam afiri a emu duru yɛ tɔn 100/da mu no, wɔtaa de plansifter ahorow pii di dwuma, a emu biara na ɛhwɛ nnwuma a wɔyɛ wɔ "nhyehyɛe" ahorow mu, sɛ nhwɛso no:
Break System Nhyehyɛe Ho Nhyehyɛe:Di nneɛma a efi break rolls no mu ho dwuma. N’adwuma titiriw ne sɛ ɛbɛyi esiam a ɛyɛ papa-a ɛyɛ papa pii na ayɛ bran, coarse middlings, ne fine middlings a wɔde hyɛ mu.
Tew Nhyehyɛe Nhyehyɛe Nhyehyɛe:Di nneɛma a efi reduction rolls no mu ho dwuma. N’adwuma ne sɛ ɛbɛyam endosperm asinasin a ɛho tew kakra no yiye na ayɛ no yiye ma ayɛ esiam a ɛyɛ nsõ a ɛkorɔn-grade, a ɛba fam-.
Scratch System Nhyehyɛe Ho Nhyehyɛe:Di nneɛma a efi scratch rolls no ho dwuma. Ɛyɛ endosperm asinasin a ɛwɔ bran nketenkete a ɛbata ho no ho adwuma ma ɛho tew bio.
Tailings System Nhyehyɛe Ho Nhyehyɛe:Di nneɛma a efi tailings rolls no mu ho dwuma. Ɛyɛ stocks a bran pii wom ho adwuma, na ne botae ne sɛ ebeyi esiam pii sɛnea ɛbɛyɛ yiye bere a ɛma esiam no yɛ papa no.
III. Adwumayɛ Nnyinasosɛm ne Nhyehyɛe mu Nneɛma
Nhyehyɛe Titiriw:
Sieve Casing:Dade dan tenten bi, a emu no akyekyɛ mu ayɛ no adan anaa "afã horow" pii a ɛde ne ho.
Sieve Frames a Wɔde Yɛ Nneɛma:Nneɛma atitiriw a wɔde yɛ adwuma no. Frame biara a wɔaboaboa ano no kura sieves a ɛsono nea wɔakyerɛkyerɛ mu (wɔde silk anaa nylon ahama anwene). Mesh aperture no taa yɛ finer fi soro kosi ase, anaasɛ wɔahyehyɛ no sɛnea nhyehyɛe ahwehwɛde ahorow te. Nneɛma no tu wɔ ɔkwan a ɛkɔ soro a ɛkyinkyini wɔ nnua no mu. Nneɛma nketenkete a ɛsua sen aperture no fa mu ("throughs"), bere a nneɛma akɛse no da so ara wɔ sieve no ani ("overtails").
Mfiri a Wɔde Ka Kar:Mpɛn pii no, wɔde motor a ɛda hɔ a wɔde ahyɛ soro na ɛka no. Ɛnam nneɛma a wɔde siw ano so ma ɛyɛ nea ɛkɔ soro, ɛyɛ wimhyɛn a ɛkyinkyini. Saa kankyee yi trɛw ade no mu pɛpɛɛpɛ wɔ sieve no ani, na ɛma ɛkɔ abɔnten wɔ ɔkwan a ɛyɛ nkuruwankuruwa so ma ɛne apon no di nkitaho yiye.
Adwumayɛ Nhyehyɛe:
Didi:Asase so nneɛma fi plansifter no atifi hyɛn mu na wɔkyekyɛ mu kɔ mmeae ahorow ne akwan a wɔahyɛ ato hɔ a ɛsen fa mu.
Nkɔso a Wɔde Sifting:Adeɛ a ɛnam rotary motion so na ɛkanyan no, fa sieve layers ahodoɔ a ɛsono mesh akɛseɛ no mu nnidiso nnidiso.
Grading & Nneɛma a Wɔaboaboa Ano:Sieve layer biara tetew nneɛma no mu ma ɛyɛ overtails (retained) ne throughs (passed). Wɔnam akwan a ɛwɔ mu so boaboa nneɛma a efi ntoatoaso ne akwan horow a ɛsen mu ano wɔ ɔkwan soronko so.
Yi no:Awiei koraa no, aguadidan ahorow pii a ɛwɔ plansifter no ase no gyae nneɛma ahorow a wɔahyɛ da ayɛ no bere koro mu. Afei wɔde eyinom kɔ baabi a wɔrekɔ no pɛpɛɛpɛ (mpɛn pii no wɔde mframa) kɔ.
IV. Mfiridwuma mu Nneɛma Titiriw ne Nkɛntɛnso
Plansifter no adwumayɛ na ɛkyerɛ sɛnea milling nhyehyɛe no nyinaa bɛyɛ adwuma yiye:
Sifting Surface Area: Ɔde ne nsa kyerɛɛ ne so.Beae a wɔsesa no kɛse kyerɛ sɛ wobetumi asiesie nneɛma a ɛkorɔn na wɔayɛ no yiye. Mfaso titiriw a plansifter no wɔ ne sɛ obenya beae kɛse a wɔde siw nneɛma wɔ nan ase ketewaa bi mu denam ntoatoaso pii a wɔbɛboaboa ano so. owiyammo a emu duru yɛ tɔn 100/da hia beae a ɛdɔɔso a wɔde siesie nneɛma sɛnea wɔayɛ no sɛnea wɔyɛ no.
Sieve Nsiesiei:Sieve specifications a wɔpaw (mesh dodow, nneɛma, weave density) yɛ ade titiriw a ɛwɔ nhyehyɛe nhyehyɛe mu. Ɛkyerɛ tẽẽ grading precision, flow ratio of different stocks, ne awiei esiam quality parameters (te sɛ particle size, ash content).
Sifting a Ɛyɛ Yiye:Esiam a wotumi tetew mu ɔha biara mu nkyem 100 a woyi fi stock no mu ankasa. Adwumayɛ a ɛkɔ soro no hwɛ hu sɛ "wɔyi nneɛma pii," ɛtew nneɛma a wɔsan di akɔneaba a ɛho nhia so, ɛma esiam a wonya ne nea wotumi yɛ no kɔ soro, na ɛtew ahoɔden a wɔde di dwuma no so.
Nneɛma a Wɔde Kankan:Ahoɔhare a ɛkyinkyini ne eccentricity na ɛkyerɛ ahoɔhare ne akwan a nneɛma a ɛwɔ sieve no ani fa so. Eyinom hia optimization a egyina stock su ne sieve specifications so.
Sieve a Wɔde Hohoro Nneɛma:Nea ɛbɛyɛ na wɔasiw anifurae (ansiw) ano no, mpɛn pii no, mfiri a wɔde tew nneɛma ho (sɛ nhwɛso no, ntama a wɔde ayɛ ntama, rɔba bɔɔl) a ɛbɔ abɔ ahama no ase bere a wɔreyɛ adwuma no, na ɛma apon no mu da hɔ.
V. Nsɛm a Wɔaboaboa Ano: "Separation Hub" a ɛwɔ Milling Process no mu
Yebetumi afa nsɛdi so ate dwuma a nhyehyɛeyɛfo no di ase:
Asoɛe a Ɛhwɛ Kar Ho Nsɛm So:Ɛfa "karka" a wɔadi afra (asase so nneɛma a efi roller mills) na ɛkyerɛ kar biara (particle) kwan pɛpɛɛpɛ kɔ nea edi hɔ a ɛfata a egyina ne "su ne baabi a ɛkɔ" (kɛse ne ne su so).
Ɔpon ano hwɛfo a ɔyɛ papa:Ɛdenam nkyerɛwde a ɛyɛ pɛpɛɛpɛ so no, ɛhwɛ hu sɛ endosperm kronkron nkutoo na ɛhyɛn nhyehyɛe a wɔde tew so no mu, na ɛma wotumi yɛ esiam soronko a ɛyɛ papa-. Ɛsan nso mma bran a ɛpaapae dodo no nsɛe esiam no, na ɛma esiam no ho tew.
Aba ne Mfaso Ho Bɔhyɛfo:Mpɛn pii no, tumi a plansifter no tumi yiyi nneɛma mu no yɛ ade titiriw a ɛma owiyammo bi yɛ nneɛma. Ne dwumadi a etu mpɔn na ɛyɛ pintinn no yɛ ade titiriw a ɛbɛma wɔanya tumi a wɔayɛ ne sɛnea woyi fi mu no.
Sɛ ɛnyɛ plansifter no a, anka nnɛyi esiam afiri a wɔde yɛ nneɛma a etu mpɔn, ɛyɛ pɛpɛɛpɛ, na ɛkɔ so yɛ no rentumi nyɛ yiye. Egyina hɔ komm wɔ owiyammo no mu, na ɛyɛ "ahyɛde ahorow a ɛyɛ den na ɛyɛ pɛpɛɛpɛ a wɔde hyehyɛ nneɛma" denam ne mu mesh apertures mpempem pii so, na egyina hɔ ma nneɛma atitiriw a ɛho hia sen biara wɔ mfiridwuma mu no mu biako wɔ akwantu a efi "ayam" kosi " esiam a wɔawie" no mu.
