Wɔ esiam afiri mu no, ahotew fi ase wɔ pre-cleaner no so. Sɛ aburow ba mu ara pɛ a, ɛfa saa afiri yi mu de yi efĩ-fi hɔ a ɛde nneɛma hyehyɛ sɛnea ɛbɛyɛ a adeyɛ no nkae no betumi atu mmirika a biribiara nhaw no.
I. Adwuma Titiriw: Efĩ a Ɛyɛ Kɔkɔɔ ne Nea Ɛyɛ Hare a Woyi Fi Hɔ
Adwuma titiriw a pre-cleaner no yɛ ne sɛ ɔbɛyɛ mfitiaseɛ, kɛseɛ-ahohoro wɔ aburow a wɔannoa a ɛreba no ho, ayi efĩ a ɛyɛ kɛseɛ dodo anaasɛ emu duru yɛ hare dodo, a ɛnyɛ den sɛ nnwinnadeɛ a ɛdi hɔ no bedi ho dwuma.
Nneɛma atitiriw a woyi fi hɔ no bi ne:
Efĩ a Ɛyɛ Kɔkɔɔ:
Abo akɛse, birikisi, asase a wɔabɔ no asinasin, nhama, plastic ntama, bag asinasin a wɔanwene, atoko nnua, sare, nnua a wɔayam
Hann Efĩ (wɔ mfonini ahorow bi so):
husks, nwura aba
Fine Impurities (wɔ mfonini ahorow bi so):
Abo nketewa, anhwea nketenkete
II. Gyinabea wɔ Flour Mill Process Flow no mu
Wɔtaa de pre-cleaner no si hɔ wɔ ɔfã a wɔde siesie no mfiase pɛɛ, kyerɛ sɛ, sɛ adwinnade a edi kan wɔ aburow a wɔannoa a wɔagye akyi.
Typical Adeyɛ Flow Gyinabea:
Raw Grain Reception → Pre-Cleaner → Magnetic Separator (wɔpɛ) → Tempering/Unclean Wheat Silos (Bere tiaa mu Storage) → Nnwinnade a Ɛdi Akyiri a Wɔde Tew Ahotew (Vibrating Separator, Destoner, Scourer, ne nea ɛkeka ho) → Damping & Conditioning → Milling
Nea enti a wɔde si anim pɛɛ ne sɛ:
Efĩ a ɛyɛ den te sɛ abo akɛse ne dade bɛsɛe nneɛma a ɛpaapae nneɛma a ɛwosow no ntama, destoners deck, scourers nneɛma a ɛbɔ no kɛse, na sɛ ɛkɔ nnwinnade a ɛwɔ nsu no ase mu a, ɛde roller mills no ahobammɔ ato asiane mu tẽẽ.
Ɛnyɛ den sɛ efĩ a ɛyɛ mmerɛw te sɛ nhama ne plastic sheeting bɛkyekyere bearing ne pulley ahorow a ɛwɔ mfiri a wɔde fa nneɛma mu, na ɛde akwansiw ne nnwinnade mpo sɛe.
Sɛ woyi mfutuma ne efĩ a emu yɛ hare pii fi hɔ a, ɛtew mfutuma a ɛwɔ afã horow a ɛwɔ nsu no ase no so kɛse, na ɛma baabi a wɔyɛ adwuma no tu mpɔn.
III. Adwumayɛ Nnyinasosɛm ne Nneɛma Ahorow Titiriw
Pre-cleaners de nnyinasosɛm a ɛne sɛ wɔde sieving di dwuma titiriw, a mpɛn pii no wɔde mframa a wɔtwetwe anaa magnetic separation ka ho na ama wɔatumi ayi efĩ afi hɔ.
Nneɛma atitiriw abiɛsa na ɛwɔ hɔ:
1. Wosow Pre-Ahotew
Motor bi a ɛyɛ nwonwa anaasɛ ɛwosow na ɛma screen no ani yɛ nea ɛkɔ akyi anaasɛ ɛyɛ kurukuruwa. Nneɛma no kɔ n’anim wɔ ahurututu mu wɔ screen no ani. Screen layer a ɛwɔ soro (a ɛwɔ apon akɛse) no kura efĩ a ɛyɛ mmerɛw, bere a screen layer a ɛwɔ ase (a aperture nketewa wom) no kura aburow a ɛho tew no mu; efĩ pa ne mfutuma fa screen no mu hwe ase.
Su ahorow: Nhyehyɛe a ɛnyɛ den, tumi kɛse a wɔde di dwuma, screening a ɛkorɔn. Eyi ne mprempren ade titiriw a wɔpaw, a ɛfata ma esiam afiri ahorow, titiriw akɛse ne akɛse{1}}kɛse.
2. Rotary Drum Pre-Ahotew ho
Ɛwɔ sanku a ɛkyinkyini a ɛyɛ ahinanan anaa kurukuruwa a ntokuru wom. Sanku no di akɔneaba nkakrankakra. Nneɛma hyɛn sanku no mu; bere a ɛkyinkyini no, awi no fa ntokuru no mu hwe ase, bere a efĩ a ɛyɛ mmerɛw fi sanku no awiei fi mu ba no.
Su ahorow: Ɔdansi a ɛyɛ den, etu mpɔn wɔ efĩ a ɛyɛ mmerɛw a woyi fi hɔ mu, ɛyɛ adwuma a ɛyɛ den. Nanso, ɛwɔ anammɔn kɛse na ɛfata ma tebea horow a ɛhwehwɛ sɛ woyi efĩ a ɛyɛ mmerɛw kɛse fi hɔ yiye na wotumi yɛ nneɛma akɛse.
3. Pre-Cleaner a wɔaka abom
Ɛgyina screen a ɛwosow anaa drum screen so na ɛka aspiration system ne magnetic separator bom. Aspiration nhyehyɛe no yi efĩ a emu yɛ hare (mfutuma, awns, awi a ayɛ mmerɛw) fi hɔ, na magnetic separator no yi magnetic dade efĩ fi hɔ.
Su ahorow: Dwumadi a wɔaka abom, ahotew a etu mpɔn, nan ase a ɛyɛ ketewaa bi. Ɛfata ma nnɛyi esiam afiri a wɔde afiri a wɔde yɛ adwuma a ɛkorɔn.
IV. Adwumayɛ Nhyehyɛe
Sɛ yɛde vibrating pre-cleaner di dwuma sɛ nhwɛso a, adwumayɛ nhyehyɛe no te sɛ nea edidi so yi:
Infeed: Raw grain nam pre{0}}cleaner no feed inlet no mu denam conveying equipment so na wɔkyekyɛ no pɛpɛɛpɛ wɔ screen no ani.
Nhwehwɛmu a wɔyɛ:
Top Screen: Openings yɛ akɛse-taa yɛ φ8–12 mm anaasɛ ahinanan slots. Nneɛma a ɛyɛ mmerɛw te sɛ abo, nhama, ne sare ntumi mfa mu; wɔtwetwe fi screen no so kɛkɛ na wofi efĩ a ɛyɛ mmerɛw no mu.
Bottom Screen: Nneɛma a wɔbue no yɛ nketewa, mpɛn pii no ɛyɛ φ2.5–4.0 mm. Awi a ɛho tew tra so na ɛkɔ baabi a wɔtɔn aburow a ɛho tew no. Nneɛma pa-mfutuma, abo nketewa, nnua a abubu-hwe ase fa mu na ɛtwetwe sɛ ɛnyɛ kɛse.
Aspiration (sɛ wɔde ahyɛ mu a): Aspiration nhyehyɛe bi twe efĩ a emu yɛ hare-awns, awi a ayɛ mmerɛw, mfutuma-bere a wɔrema aduan anaasɛ wɔrehwehwɛ mu, na ɛboaboa ano wɔ beae biako.
Magnetic Separation (sɛ wɔde ahyɛ mu a): Magnets (ɛtena hɔ daa anaa anyinam ahoɔden) tena baabi a ɛkɔ anaa nea ɛkɔ mu no kyere na yi magnetic dade asinasin.
Nneɛma a wɔde gu mu: Hohoro aburow ti ho kɔ silo ahorow no mu ma wɔde sie bere tiaa bi. Efĩ a ɛyɛ mmerɛw, efĩ a ɛyɛ fɛ, efĩ a emu yɛ hare, ne dade a ɛyɛ fĩ biara kɔ mmeae a wɔboaboa ano.
V. Mfiridwuma mu Nneɛma Titiriw ne Ne Nkɛntɛnso
Pre-cleaner no adwumayɛ nya ahotew ɔfã no nyinaa adwumayɛ ne ahoɔden so nkɛntɛnso tẽẽ:
Processing Capacity: Ɛsɛ sɛ ɛne esiam afiri no mu nneɛma a wɔyɛ no hyia. Wɔ owiyammo a emu duru yɛ tɔn 100-da biara ho no, mpɛn pii no, nea ɛsɛ sɛ nea wɔde tew nneɛma ho no tumi yɛ tɔn 120-150/da (sɛ wosusuw nsu a ɛsen sen biara ho a).
Screen Aperture Configuration: Aperture kɛse ne ne nsusuwii a wobɛpaw no ho hia yiye. Sɛ ɛyɛ ketewaa dodo a, ebia ntama a wɔde kata so no siw, na ebia wɔde efĩ no bɛbɔ aburow bi a ɛho tew no ho wɔ ɔkwan a ɛnteɛ so. Sɛ ɛsõ dodo a, efĩ a ɛyɛ mmerɛw bi betumi afa mfiri a ɛwɔ nsu no ase mu.
Screening Efficiency: Efĩ dodow a woyi fi aburow a ɛho tew no mu yiye. Ɛsɛ sɛ pre-cleaner a ɛyɛ adwuma yiye yi efĩ a ɛyɛ mmerɛw bɛboro 95% ne efĩ a ɛyɛ hare no fã kɛse bi fi hɔ.
Grain Loss in Reject: Aburow a ɛho tew a wɔde fra efĩ a wɔtow gu no mu fã. Eyi yɛ sikasɛm mu sɛnkyerɛnne titiriw a ɛkyerɛ sɛnea wɔyɛ adwuma ansa na -ho tew. Aburow a ɛyera kɛse kyerɛ sɛ nneɛma a wɔde yɛ nneɛma no sɛe na ɛhwehwɛ sɛ wɔyɛ nsakrae wɔ adwumayɛ mu.
Ankasa-Ahotew Tumi: Sɛ́ ebia screen no ani taa siw ne sɛ ebia wɔde mfiri a wɔde tew nneɛma ho (sɛ nhwɛso no, bɔɔl a ɛrehuruhuruw, brɔs a wɔde siesie) ahyɛ mu no nya adwumayɛ a ɛkɔ so no pintinn no so nkɛntɛnso tẽẽ.
VI. Tɔfabɔ
Ɛwom sɛ ɛnyɛ den koraa wɔ adansi mu de, nanso pre-cleaner no kura gyinabea a ɛyɛ ɔkwan a wontumi nsi ananmu wɔ esiam afiri mu:
Adwinnade Ho Banbɔfo: Ɛyɛ akwanside a edi kan ne nea ɛho hia sen biara a ɛbɔ nnwinnade ho ban, na esiw nnwinnade a ne bo yɛ den a edi hɔ (titiriw roller mills) a efĩ a ɛyɛ mmerɛw sɛe no ano yiye.
Production Continuity Ensurer: Ɛdenam efĩ a ɛyɛ mmerɛw sɛ ɛbɛkyekyere te sɛ nhama ne plastic sheeting a woyi fi hɔ so no, ɛhwɛ ma nneɛma a wɔde fa nneɛma no yɛ adwuma pintinn na ɛtew bere a wɔde gyae adwuma a wɔnyɛ ho nhyehyɛe no so.
Fapem a Ɛma Nneɛma a Wɔyɛ no Yiye: Ɛma adwumayɛ tebea pa ma mfiri a wɔde siesie nneɛma a ɛwɔ nsuo ase no, na ɛma wɔde wɔn adwene si efĩ a ne kɛseɛ te sɛ awi ("efĩ a ne kɛseɛ te sɛ awi") a wɔbɛyi afiri hɔ so, na ɛnam so ama ɔfa a wɔde tew nneɛma ho no nyinaa yɛ adwuma yie.
Sɛ yɛbɛka no sɛnkyerɛnne kwan so a, nea ɔyɛ pre-cleaner ne "goalkeeper" a ɔwɔ esiam afiri no mu. Esiane sɛ ɛwɔ nea edi kan wɔ nneɛma a wɔyɛ no nyinaa mu nti, ɛde ɔkwan a ɛyɛ den na etu mpɔn di dwuma de siw "ntuafo" a ɛda adi na wɔn ho yɛ hu sen biara no kwan, na ɛto fapem a ɛyɛ den ma nnwinnade a edi hɔ a edi hɔ pɛpɛɛpɛ a edi hɔ nyinaa a wɔde bɛyɛ adwuma a ahobammɔ wom na etu mpɔn.
