Nneɛma a mfiri a ɛma ɛyow di ho dwuma no nni ano. Sɛ nsonsonoeɛ a ɛwɔ physicochemical su a ɛwɔ nneɛma ahodoɔ ne nneɛma a wɔhwehwɛ mu no da nkyɛn a, thermophysical su a ɛwɔ nneɛma no mu wɔ berɛ a ɛreyow no ne nneɛma a ɛhia ma drying system nnwinnadeɛ berɛ a ɛreyɛ hyeɛ no nso yɛ adeɛ titire a ɛsɛ sɛ wɔyɛ ma adwumfoɔ. Saa asɛm yi de akwan bi a wɔfa so paw nneɛma wɔ mfiri a wɔde dwira mu ma wɔn a wɔyɛ nneɛma no ho nyansahyɛ ma.
Nneɛma a ɛwɔ mfiri a ɛma ɛyow mu .
Ɛde besi nnɛ no, wɔayɛ mfiri ahorow ɔhaha pii a wɔde ma ɛyow no yiye, na wɔtaa de bɛboro ɔha di dwuma wɔ mfiridwuma mu. Akwan ahorow nso wɔ hɔ a wɔfa so kyekyɛ nnwinnade a wɔde ma ɛyow mu. Sɛ wogyina ɔkwan a wɔfa so de ɔhyew kɔ baabi foforo no so a, wobetumi akyekyɛ mu ayɛ no convection dryers (te sɛ mframa a wɔde dry, spray dryers, rotary rapid dryers, fluidized bed dryers, ne nea ɛkeka ho), conduction dryers (te sɛ rake dryers, roller dryers), ne radiation dryers (te sɛ microwave dryers, far{3}} infrared dryers). Nea ɛka ho no, nnwinnade a ɛma ɛyow a ɛka akwan pii a ɛma ɔhyew kɔ so te sɛ paddle dryers bom wɔ hɔ.
Dryers dodow no ara nyɛ non{0}}standard nnwinnade, titiriw esiane sɛ dryer biara di nneɛma ahorow ho dwuma nti, na drying tebea horow pii sesa gyina nneɛma no so, na ɛde nsakrae ba dryer no nhyehyɛe ne nneɛma mu. Enti, ɛho hia sɛ yɛkyerɛkyerɛ nneɛma pɔtee a ɛwɔ nneɛma a ɛsɛ sɛ ɛyow no mu pefee, te sɛ nneɛma tebea, nsu ahorow a ɛwɔ mu, nneɛma a wɔde yɛ adwuma, nneɛma no su wɔ bere a ɛreyow no mu, corrosiveness a ɛwɔ hɔ, ogya a ɛyɛ hyew ne nea ɛpae, anyinam ahoɔden a ɛyɛ gyinabea, nneɛma pɔtee a wɔhwehwɛ, ne nneɛma no ɔhyew hyew, sɛnea ɛbɛyɛ a wobehu nneɛma ahorow a ɛma nsu no yɛ hyew no. Eyi nti, dryers pii ntumi nyɛ mass- Enti, ɛsɛ sɛ nhyehyɛe no hwɛ sɛnea nneɛma no pɔtee te ne sɛnea ebetumi ayɛ nsakrae wɔ adwumayɛ tebea horow no mu.
Ɔkwan a wɔfa so paw nneɛma a wɔde di dwuma wɔ mfiri a wɔde dwira mu no mu no yɛ-a wonim. Nneɛma a wɔde yɛ mfiri a ɛma ɛyow no yɛ ade titiriw wɔ ɛka a wɔbɔ wɔ afiri a wɔde pam nneɛma ho no mu, na nneɛma a ɛfata a wɔpaw no yɛ ɔkwan titiriw a wɔfa so di nnwinnade bo so. Mpɛn pii no, ɛsɛ sɛ wosusuw afã horow a edidi so yi ho bere a wɔrepaw nneɛma a wɔde bɛyow no: sɛ wobedi nneɛma a wɔreyɛ ho adwuma no ahiade ho dwuma. Adwuma titiriw a mfiri a wɔde ma ɛyow yɛ ne sɛ ɛbɛma nneɛma bi a wɔde ama no ayow. Esiane sɛ dryers di nneɛma ahorow pii ho dwuma, na ɛkata mfuw pii te sɛ aburow, aduan, nnuru, nnuru, kwae mu nneɛma, krataa, ne dade so nti, nneɛma dodow a wɔde yɛ no nni ano. Ahwehwɛde ahorow a ɛwɔ hɔ ma nneɛma a wɔreyow no gu ahorow kɛse. Sɛ nhwɛso no, ɛnsɛ sɛ wɔde nnuru a wɔde yɛ nneɛma, nnuru, ɛlɛtrɔnik nneɛma, ne nneɛma a wɔde yɛ anyinam ahoɔden a wɔde yɛ nneɛma no fra dade ions bere a wɔreyɛ adwuma no; Enti, ɛsɛ sɛ wɔkwati carbon steel nneɛma wɔ nnwinnade a wɔpaw mu. Bio nso, sɛ nsu a ɛwɔ ade no mu no wɔ acid, alkali, nkyene, anaa nneɛma a ɛma nkwa a, ebetumi asɛe dade nneɛma ahorow. Saa nsɛe yi mu yɛ den, titiriw bere a wɔreyɛ hyew no. Enti, ɛsɛ sɛ wogyina nsu a ɛwɔ nneɛma no mu no su so paw nneɛma a ɛfata.
Ɛdefa nneɛma a wɔpaw a egyina dryer type so, sɛnea yɛadi kan aka no, dryers ahorow ahorow wɔ hɔ, a emu biara wɔ adwumayɛ nnyinasosɛm soronko. Enti, ɛsɛ sɛ wosusuw eyi ho yiye bere a wɔrepaw nneɛma no. Sɛ nhwɛso no, sɛ wɔde magnesium oxide a ɛwɔ mframa a ɛsen mu no yow a, ahoɔhare kɛse a ade no de ba mframa paipu no mu ne magnesium oxide a ɛyɛ den no ma afiri a ɛma ɛyow no kɔn. Enti, ɛsɛ sɛ wɔyɛ ade a ɛho ayɛ fĩ-ɛko tia nneɛma a ɛho ayɛ fĩ-nneɛma a ɛko tia ade no ma saa beae yi. Bio nso, dade a ɛnyɛ den no wɔ ɔhyew a ɛkɔ fam no so tew kɛse sen carbon dade. Enti, wɔ drying equipment a conduction yɛ primary heat transfer kwan no, sɛ wɔpaw stainless steel sɛ ade titiriw a, ɛsɛ sɛ wɔbu ɔhyew exchange area no ho akontaa gyina thermal conductivity a ɛwɔ stainless steel so. Engineering nhwɛsoɔ kyerɛ sɛ sɛ worepaw steam heat exchangers a, stainless steel hwehwɛ sɛ 30% wɔ soro sen carbon steel.
Nneɛma a wɔpaw ma ɔkwan a wɔfa so ma ɛyow no gu ahorow gyina nneɛma a wɔde yɛ ne sɛnea ɛyow no so. Bere bi meyɛɛ-temperature dryer a ɛkorɔn a bere koro no ara mu no ɛyow nkyene a ɛnyɛ nkwaboaa na efi polymerization reaction ase. Na mframa a ɛma ɛyow a wɔhwehwɛ no boro digrii 800 , na ɛho hia sɛ wɔde dade a ɛnyɛ den a ɛnyɛ hyew a ɛyɛ den a ne bo yɛ den di dwuma. Nanso, sɛ yɛsusu sɛ ɛnyɛ drying chambers nyinaa na ɛwɔ soro-temperature zone no a, akontabuo kyerɛɛ sɛ wɔde nneɛma a ɛkorɔn-temperature resistant materials dii dwuma wɔ-temperature area no mu nko ara. Ɛatu mmirika sɛnea ɛsɛ bɛboro afe biako ni.
Nneɛma a wɔpaw a egyina nnwinnade a wɔde si hɔ so: Wɔ nsɛm pii mu no, sɛ wodi atifi hɔ tebea horow no so mpo a, ɛsɛ sɛ wosusuw nneɛma a wɔde si hɔ no ho wɔ nneɛma no so. Sɛ wɔde nnwinnade no si nnuru adwumayɛbea bi mu a, ɛsɛ sɛ wosusuw sɛnea nneɛma a atwa yɛn ho ahyia no nsɛe wɔ mfiri no ho, nhyehyɛe a wɔde di dwuma, ne anyinam ahoɔden nhyehyɛe no ho yiye na ama wɔanya ano aduru a ɛfata a wɔde bɛyɛ adwuma.
Akwan a wɔfa so bɔ nneɛma a ɛma nsu no nsɛe ho ban: Nneɛma dodow no ara a wɔde ma ɛyow no yɛ afã horow a wɔde weld ayɛ, mprɛte, ne cylinders. corrosion protection treatment ho hia ma dryers a ɛsono sɛnea wɔde di dwuma. Osuahu ahorow bi a ɛwɔ nneɛma a ɛma nneɛma nsɛe ne akwan a wɔfa so yɛ nneɛma no wɔ ase ha.
Phosphating-Passivation Process: Wɔ wosow fluidized bed dryers a wɔyɛ mu no, 70% afã horow no yɛ carbon steel. Bere tenten a wɔde dannan nneɛma wɔ akwan horow ntam no ma rust kɛse bi ba wɔ soro, na ɛhwehwɛ sɛ wɔde nsa yɛ adwuma kɛse ansa na wɔayi nkannare ansa na wɔayɛ mfonini. Phosphating-Passivation, ɛnam electrochemical reaction so, sa rust-akata dade adwuma so wɔ anammɔn biako mu, na ɛda mfitiase dade kɔla adi bere a bere koro no ara ɛyɛ den anti-rust film. Saa sini yi betumi agyina mframa a ɛyɛ nwini a wɔde di dwuma no ano bɛboro nna du a ɛnyɛ nea ɛyɛ mmerɛw. Ne dwumadi yɛ mmerɛw, ɛma adwumayɛbea no tu mpɔn, ɛtew adwumayɛfo ahoɔden so, na ɛma nnipa tumi ne nneɛma a wɔde yɛ adwuma no tra hɔ. Phosphate-aduru a ɛma nneɛma kɔ so no kura emulsifiers, molybdates, phosphate a ɛtumi nwura mu, ne acid ahodoɔ. Ɛnyɛ sɛ saa kwan yi fa mfiri ahorow a yɛadi kan aka ho asɛm no ho nko na mmom wobetumi de adi dwuma de abɔ corrosion ahobammɔ ho ban wɔ nhyehyɛe anaa nnua afoforo a ɛte saa ara ho.
Electrostatic powder coating a wɔde di dwuma wɔ mfiri a wɔde ma ɛyow mu: Atetesɛm mu mfoniniyɛ yɛ nsu a ester, ketone, ne hydrocarbon pii wom, na ɛde ɔhaw pii ba wɔ nneɛma a wɔyɛ, nea wɔkora so, nea wɔde kɔ, ne ne yɛ mu. Wɔyɛ ogya, ɛpae, na ɛnyɛ nea ahobammɔ wom koraa. Esiane sɛ ɛyɛ awuduru nti, ɛyɛ hyew kɔ wim, na ɛma nneɛma a atwa yɛn ho ahyia no ho gu fĩ kɛse. Enti, wɔn a wɔyɛ nneɛma a wɔde kata wɔn ho wɔ ɔman no mu ne amanaman ntam nneɛma a wɔde kata so no ayɛ wɔn ho sɛ wɔbɛyɛ nneɛma foforo a wɔde kata so a wɔde ano aduru kakraa bi na edi dwuma anaasɛ wɔmfa nni dwuma koraa. Ade foforo a ɛte saa a wɔde kata so no biako ne powder a wɔde kata so.
Nneɛma a ɛyɛ nwini a wɔde nsu a ɛyɛ nwini ayɛ a ɛwosow no atifi kataso no mu dodow no ara yɛ nea ɛyɛ nwini-rolled stainless steel, na ɛma ɛho ka yɛ kɛse. Nea enti a wɔde dade a ɛnyɛ den di dwuma sen sɛ wɔde carbon dade a ɛyɛ mmerɛw bedi dwuma ne sɛ nnwinnade no ne nneɛma ne mframa ahorow a ɛporɔw no bedi nkitaho bere a wɔreyɛ adwuma no, na dade a ɛnyɛ den no wɔ ahoɔden a ɛyɛ den a ɛko tia nsɛe; Enti, wɔde dade a ɛnyɛ den a ɛyɛ nwini-de dade a ɛnyɛ den na edi dwuma.
Electrostatic spraying of polyester resin powder coatings onto ordinary carbon steel no nya corrosion resistance a ɛne dade a ɛnyɛ den hyia. Esiane sɛ saa powder a wɔde kata so yi yɛ den, ɛyɛ nea ɛtra hɔ kyɛ, na ɛwɔ nneɛma pa a wɔde siesie hɔ, ne abɔnten wim tebea a ɛyɛ papa a ɛko tia ne ɔhyew a ɛko tia, ne nea ɛyɛ papa a ɛko tia corrosion, chalking a ɛko tia, gloss, ne kɔla adwumayɛ nti, electrostatic powder a wɔde petepete so no fata koraa ma corrosion ahobammɔ a ɛwɔ dryer shells no mu.
Nkɔmmɔbɔ a ɛfa welding a ɛfa austenitic nickel-Chromium stainless steel ho no, nneɛma pii a wɔde yɛ drying no yɛ welded sheet metal structures, a nkratafa dodow no ara yɛ 1cr18ni9ti (18-8 type). Mpɛn pii no, ɔhaw ahorow a ɛba wɔ nsɛe ne akisikuru mu ba bere a wɔreyɛ welding no. Eyi ka nneɛma a wɔyɛ no nkwa nna ne sɛnea ɛyɛ adwuma kɛse. Nsonsonoe a ɛda austenitic stainless steel ne carbon steel a ɛyɛ mpapahwekwa ntam no da ne ɔhyew a ɛnyɛ yiye, ɔhyew ntrɛwmu nsusuwii kɛse bere a wɔreyɛ ɔhyew, ne anyinam ahoɔden a ɛko tia kɛse. Esiane saa su ahorow yi nti, welding nhyehyɛe soronko ho hia ma austenitic dade. Intergranular corrosion yɛ ɔhaw atitiriw a ɛwɔ dade a ɛwɔ ahoɔden kɛse mu no mu biako. Bere a saa dade yi ankasa wɔ corrosion resistance a ɛkorɔn no, welding nhyehyɛe no brɛ saa resistance yi ase. Nneɛma a ɛyɛ mmerɛw bere a wɔreyɛ austenitic dade no welding no bi ne: ne nyinaa mu, baabi a ɛwɔ, ne nsɛe a ɛwɔ granular ntam. adwumayɛbea bi a ɛwɔ ɔman no mu de mfiri a ɛma nsu fi amannɔne ba amannɔne. Welding akwan a ɛmfata no sɛee microstructure a ɛwɔ dade a ɛnyɛ den a ɛwɔ bag filter no mu no, na ɛmaa intergranular corrosion bae. Bere a wɔreyow no, na nneɛma a ɛwɔ ade no mu no wɔ nneɛma a acid wom, na ɛma dade no bubu ntɛmntɛm.
Awiei Bere a mfiridwuma a ɛma ɛyow no anya nkɔso akodu ne tebea a ɛwɔ hɔ mprempren no mu, sɛ mfiridwuma ho mfiridwuma no, ɛnyɛ sɛ ne nkonimdi no gyina sɛnea nneɛma a wɔde hohoro nneɛma ho no te so nko, na mmom egyina nnwinnade nhyehyɛe, nneɛma a wɔpaw, ne akwan a wɔfa so yɛ so nso. Sɛ yesusuw nneɛma ahorow ho a, nneɛma a wɔyɛ ho nhyehyɛe a ntease wom a wɔbɛyɛ no ho hia kɛse wɔ sikasɛm mu.