KHOA HOC CONG NGHE
K£T Q U A IVGHIEIV CUU THIET K E CHE TAO V A KHAO IVGHIEM M A Y RIJA IMAM BAO IMGU
U Anh DiieS Bui Manh Tuan^ Vu K^ Ho^ich^
T6MTAT
Nghien ciiu nham thiet ke', che tao va khao nghiem may nia nam bao ngu vol muc dich nang cao hi^u sual qua trinh riia. K^t qua tinh loan thiet ke da xac dinh duac cac thong so cau tao va thong so lam viec cua may vcn nang suat thi^t k^ 200 kg/h. Tren co so tinh toan thiet ke, may riia nam da duuc che tao. Cac ket qua khao nghidm cho thay may hoat dong on dinh, cac thong so phu hop voi cac kf-t qua dnh toan thiet ke. Hieu su^t nia dat cao nhat tai gia tri thoi gian nia 2 phiit voi do sach ca hoc oia nam dat 100%. nSng suat may nia dat 245 kg/h, ty 1^ gay nat cua nam bao ngu sau khi qua may nia la 1,8%, tieu thu dien nSng neng cho qua trinh riia la 0,5 kWh/100 kg nam va luong nuoc cin thi&t cho qua trinh nia la 4,3 lit/kg nam.
Tir kh6a: Nam bao ngir, dg sach, thoi gian nia. Ueu tiiu dien nSng rieng.
1 . DAT VAN BE
Nam bao ngu co ten khoa hgc la Pleurotus sp., la mOt loai nam an dupe thugc hp Pleurotaceae. Nam bao ngu dupe sijr dung rpng rai lam thuc pham do co g\i tri dinh dirSng cao, c6 dg d^m cao (ham lugng protein tu 30 - 40% duoi dang sinh khdi kho), day du cic axit amin Ihid y^u, it chat beo nen tdt cho siic khoe. Ben canh dd nam c6n co gia tri nSng lugng cao, giau k h o ^ g ch^t v^ cctc vitamin, cd huong tham do su hi^n di^n cua benzaldehyde [1]. Trong nam co nhi^u boat chat sinh hpc cd cong dung dugc lieu nhu cac lovastatin, statin cd tac dung giam cholesterol [2],
Neim bao ngu dupe trdng tr^n cac gia the la miin cua, mun xa dira,... do dd sau khi thu hoach nam kh6ng th^ tranh khoi vi^c dinh theo cac tap chat la gia the va cac loai tap chat khac nhu bui, ban bam tr^n be m$t nam. Vi vay, cong doan riia sach nam trudc khi sii dung la rat can thi^t nhim dam bao ve sinh an toan thuc pham.
Phuong phap rua cac loai tap chat cho rau cu qua pho bi^n hi6n nay la nia thii cong bang tay, phuong phap nay ed nang suat thap, can nhi^u lao dgng ndn chi phi san xuat cao. Cac phuong phap rua ling dung trong san xuat bao gom phuong phap nia theo kieu mai cheo, rua thiing quay, nia thimg quay choi xa diia, nia kieu sang, nia siic nude, nia bang chuydn... M6i phuong phap cd nhung uu diem khac
' Tnrong Dgi hpc Nong Lam TP. Ho Chi Minh
•Tnrong Cao ddng Cong Thuong TP. H6 Chi Minh Email: [email protected]
nhau va dupe lua chon can cu vao nguydn bdu can nia va dac tinh chat ban bam tren nguydn li^u.
Tinh ddn hidn nay co 1300 sang chd dang ky bao hp vd cac thiet bi va he thdng rira rau |3]. Ddi voi cdc loai rau cii cd du lugng thude bao vd thirc vat trdn b^
mat can kdt hgp n ^ vdi Ozone [4]. Vdi cdng nghd trdng nam bao ngu bidn nay, qua trinh so ch^ nam sau khi thu hoach chi cdn lam sach cac ch^t ban eo hgc bam trdn bd mat nam. So voi cac loai n ^ khac, nam bao ngu la loai nam mem, dd bi gay nat trong qua trinh so ehd, vi vay can lua chgn phuong phap rira phii hap voi nam bao ngu dl dam bao do sach cho nam nhimg khong lam gay nat nam, dam bao nam sau khi rira dat Tieu chuan Viet Nam.
Nhu vay, de nang cao chat luong nam bao ngu sau thu hoaeh, vide nghien cuu thidt ke, che tao va thii nghidm may rua nam ed tinh cap thiet nham phuc vu nhu cau san xuat.
2 . PHUONB PHAP lUGHBU CUU 2.1. Vat lidu thi nghidm
Vat hdu thi nghiem la nam bao ngu xam tuoi dat Tieu chuan Viet Nam TCVN 5322:1991 (CODEX STAN 38-1981). Ydu cau sau khi nia eac tap chat ca hpe cdn lai trong nam < 2% va ty Id gay nat nam sau khi rira < 5% [51.
2.2. Phuong phap nghidn ciiu 2.2.1. Phuungphip tinh toin thiet ke Cac thong sd cua may riia duge tinh toan thidt ke can cii vao nang suat nia, cac tinh ehat vat ly ciia nam bao ngu, ap dung ly thuyet tinh toan bom, may nen [6] de tinh toan va xac dmh cae thong s6 dpng
NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 -THANG 12/2019 65
KHOA HOC CONG NGHE
lyc hpc eiia bom ninx-, bom th6i sue khi, cac duong 6ng: ap dung cac Iy thuydt tinh toan vd he dan dong i<7 khi [71 d^ linh toan cac bO truydn dong cho bom.
bang tai vert nim va ly thuv^t tinh loan chi Uct may 18).
2.2.2. Phuong phap thuc nghidm la do dac cac thdng so tiiuc ngbiem
Khao nghidm khong tai dd danh gia chat lupng ciu- tao may, kiem tra hoan chinh may va khao nghidm co tai d^ ki^m tra cac kel qua linh loan thie't kd va hidu chinh thong so cdng nghd ciia may.
Cac Ihi nghidm dupe lap lai 3 lan va tinh gia di trung binh cua 3 Ian thue nghidm.
2.2.3. Phuung phap xac dinh cac thdng sd thuc ildiicni
Sir dung cac dyng cu chuydn diing d^ do true tidp cic thong sd ciia may nhu khdi lupng nguyen lidu, thdi gian nia, didn nang Ueu thu,... Cae thdng sd cdn lgi dupe xac dinh thdng qua edng thiic quy (Idl.
+ Phuong phap xac dinh nang suait:
Dung cu do: gdm can ddng hd Nhon Hda loai 5 kg;
ddng hd bam giay HS-3V.
Khi may v ^ hanh dn dinh. lay ngau nhidn mdc thoi gian d^ do khdi lupng san pham m Uiu dupe trong t phiu. Nang suat xac dinh Uieo cong thiic (1).
cong thuc (2).
1000.A
(Wh/kir) 0
60.m
Q ^ - ^ (kg/h) (1)
m: khdi lupng san pham trong t phut, kg.
t: Uidi gian cbgy may, phiit.
+ Phuong phap xac dmh tidu Uiu dien nang ndng:
Trong Uiuc nghidm, Udu tiiu didn nang ndng cua qua Uinh nia (\VliAg) dm«: xac dinh trdn co so do luT?ng dien tidu thy ciia qua tiinh nia (Wh) bang c6ng-ta didn va chia cho khdi luong san pham gia c6ng (kg).
Dyng cy do gdm c6ng-ta didn KMIC, can done ho Muni 1 loa 5 kg; ddng ho bam giay HS:n".
Phuong phap xac dmh: khi may cha\ i.ii di:
lay ngau nhien moc tiioi gian de do khdi luimn ;i,. , m dupe nia va lupng dun nang Udu Uiu .A. (\\li) m ,ni;
then gian t irfiut 19).
Tidu thu didn nang ndng (Arl \.n dmh thin
m; khdi luong nam dupe nia. kg.
.A. tieu Uiu didn eho qua trinh nia m (kg) nam, kWh.
+ Phuong phap xac dinh do sach:
Chat lupng lam sach cua may rira dupe xac dinh thong qua dp ban sdt (b^) eiia nam sau khi rua [10]
theo edng thlic (3).
b. = ^2L:^.100% (3) q,n: khdi lugng nam sau khi duoc may riia (g).
q^; khdi lugng naim duge riia sach bang thii cong Khoi lupng Qs dugc xac dinh nhu sau: nam sau khi nia bang may duoc de rao nuoc b^ mat, sau d6 lay ng^u nhit^n cac mau nam nay vdi kh6i luong q,„
va dung cp m^m de rua lai bang tay duoi v6i mxdc chay lien tuc, sau khi rtra xong cha nam rao nuoc b^
mat va can lai duoc khoi luvng q^.
2.2.4. Phuong phip xie dinh tyligaynit Ty \h gay nat ciia nam sau khi rua (r) dupe xac dinh theo cong thiic (4).
^n
r . - ^ . 1 0 0 % (4) q,: khoi lupng nam bi gay nat sau khi nia (kg) q^: khoi lupng nam ban dau cap vao may nia (kg)
3. KET QUA VA DUO LUAN
3.1. Nguy«n Ijj ciu t?o v4 nguyta 1^ Um vi$c 3.1.1. Cic sd hiu thiet ke ban dau
Nang suit may nia: 200 kg/h. May nia theo nguyen ly nia "nia mem", co he thong sue nuoc bang khi va bom nuoc. Su dung dien ap 220 V, 50 Hz.
Khoi luong the tich cua nam bao ngu: 160 kg/m' (do thuc nghiem).
Thoi gian nia, cac thont- so ap luc • he, ap suat khi,vanUKbauBt>„v,.,,u h e d , , . chinh duoc.
mill,' I w ' i r n . U i , 1 "" " " ' ' ™ " " ^ t^ao ngu
NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 TH M
KHOA HOC CONG NGHf
Hinh 1. Nguydn If c^u lao mky rua n ^ bao ngu
1. Mang cap lidu; 2. Thiing rua; 3. Vdi phun nude; 4. Bang tai vdt nam; 5. Bom mrdc; i Bom khi; 7. Voi tudi lai; 8. Cac diu sue khi; 9. Sing ngdn tap chat ldn.
Nguyen ly boat dong; nam dupe cap vao mang cap lidu (1) va di chuyen xudng bdn riia, tai day cac d^u sue khi (8) sd thdi khi tir dudi len, sue nude vira dao trpn vira rua sach nam, ddng thdi voi phun nude (3) tao ddng nuoc de nam di chuyen den bang tai vol niim (4). Nam dupe bang tai dua ra ngoai, trong qua trinh di chuyen nam dugc rira lai mdt lan nira thdng qua voi phun nuoe tuoi lai (7).
3.2. K^t qua linh toin Ihi^t k^ v^ ch^ tao 3.2.1. Tinh toin thiet ke thiing rua
Can cii vao nang suat rua 200 kg/h va thdi gian nia lau nhat la 3 phiit, khdi lupng nam cd trong thiing nia tinh dugc la 10 kg, tuong duong the tich nam trong thimg la 0,062 m^. Voi ty le nam; nuoc frong thimg rita theo the tich la 1:15 [11] thi lugng nuoc trong thimg can thiet de nia nam la 0,42 m^. De nude khdng bi tran ra khdi thiing trong khi hoat
dgng, thung nia phai cd the tich Ion hon the ti'ch cua nuoe va the tich nam trong thimg, tiic la Ion hon 0,482 m^, vay chgn the tich thimg rira 0,5 m^.
Vol thdi gian rira la 3 phiit, van tdc nam di chuyen trong thimg la v = 0,01 m/s thi ehidu dai phan rira la 1,44 m.
De lap bang tai vat nam voi goc nghieng 30", chpn chieu dai thimg nia la 2,4 m. chieu cao thiing nJra 0,6 m, vay chidu rong thiing nia la 0,7 m. Nhu vay, the tich chiia nude tdi da ciia thiing nia la 0,75 m'l Thimg rua dugc chd tao bang thep khong gi day 1,4 mm. Trdn thimg dupe thiet ke cac dng xa Iran, dng cap nuoc cho bom, dng xa day d^ dam bao cho ydu eau hoat dpng eua may.
3.2.2. Tinh toan toan thiet ke bang tai vdt nam Chieu dai phan bang tai v6t nam trong thiing nia dugc chgn theo kich thuoe thiing rira va gdc nghieng NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 12/2019 67
mOHHOCCdW NOHf bans till 3(r. nhu vay phan chieu dai bang lai nghidng
Irong thung la 12 m. Chpn chidu dai phan Uiao lid"
la 0,5 m. Bang lai dupe gan cac canh gat vm nam voi chieu eao canh la 60 mm. Kich thuoc cua bang lai vol nam Uinh bay trdn hinh 2.
can cuvao 2 thdng s6 luu lupng ^ V ' " ^ " . " L ^ v3n ...- khi, dua vao sa dd phan b6 ong f "
l6ng ldn thai ap suait cua h* thdng bom Uu la ^ Pa. Nhu vay, cong suSt may bont khi la 1 Hf.
.i-J Tmh toan diiitki hi thdngeuc diin nudv vi bom nudv . , .j,
Muc dich cua he thdng bom nude nham hudng dong cho nam di chuyen ddn bang tai vdt nam va gop phandaolrdnruanamhdn-pquatrinhnia. ^
Vi ai cac dau phun nude dupe bd tri d dau thing vdi 4 vdi phun, mdi vdi phun cd the didu chinh dupe ap luc nude phun va gdc nghieng phun. Thidt ke hi thdng bom nude dupe Uinh bay d hinh 4.
Hinh 2. Bang tai vdt nfci Xac djnh cdng suat ddng ca keo bang tai: cdng sual (loiiK CO can tbi^'t de keo bang tai khi cd tai dupe dnh toan dua tren luc keo cua nhanh cd tai va nhanh khdng lai. Kdl qua xac dinh dupe lue keo can thiet la 30,87 kG. Trdn co sd dd tinh dupe cdng suat cua dpng CO kdo bang tai la 0.5 HP.
Chpn loai dpng cu keo bang tai vdt nam la loai dpng ca Torque, day la loai dpng ca dupe che tap theo cdng ngh§ d$c bi^t dd moment cua dpng ca khdng ddi then tpc dp quay cua ddng cp.
3.2.3. Tinh toin thidt kehi thdng dng cdp khi va bom cip khi
Bom ciip khi cd tac dung thdi ddng khi vdi ap suat cao tu phia dudi ldn phia tren ben trong thimg rua nham xao trdn toan bd khdi nude trong thung hia, giup dao Upn vat lieu rua hieu qua ciia qua trinh rua tdt hon. H^ thdng dng dan khi cd dudng kinh 27 mm va cac vi in d4u phun khi dupe bd Ui tai day lllung rira vdi kich tiiudc nhu hinh 3.
1 XJ^
Hinh 3. Kich Uiudc va bd Ui cic 16 ti^ dng thdi khi M.i> bom khi lam vide 6f ap suat khi quyen la 76((
mniHg. Thani khao eac thong so may rira kit-u sue khi hidn co, chpn luu lugng may bom khi la 5 \\\.l<
Trdn ca sdf do tinh diroc vgn I6c khi la 5.68 m/s.
Hmh 4. So dd h^ tii6ng bom nude ctta may riia 1. Bom ly tam; 2. Ong hdi nude; 3. Van diSu chinh; 4. Ong din nude; 5. Cic dau phun nude
Ket qua tinh toan dupe cac thdng sd eo ban cua bom nuoc nhu sau:
- Luu lugng bom: 1,567 lit/s.
- Tdc do nuoc di Uong dau day ciia bom- 2 5 m/5
Cpt ap b(mi. 18.9 inmH/J. tuong duong 185 Pa.
Cong .uai dong .a keo .om theo tinh toan la 1' -ii-j 1. W. Chon btrTTi ly tam cong suat 1 HP
Tif cac ktt qua linh loan du^ k^ r^.,' - -•
da duo,- che tao hoan chinh. C c t h 6 „ g ^ " " "™^
dieu khi(-n.
so van hanh
^ ^ sat trdn bd
NONG NGHIEP VA PHATTRIEN NONG THON - KY 1
" ^ N G 12/2019
KHOA HOC CdNG NGHfi
Hinh 5. May nia n ^ bao ngu C^ thdng sd cua miy rua:
- Nang suat thidt kd: 200 kg/h.
- Kich thude thimg rua: dai x rpng x cao: 2490 x 700 X 600 mm.
- Th6 tich nuoc tdi da trong thiing: 750 lit.
- So dau phun nuoc; 4 voi phun.
- Bom nude: bom ly tam ed eong suat 1 HP.
- Bom khi: cdng suat 1 HP.
- Bang tai vdt nam; xich inox 304. Cong sual dpng CO 0,5 HP.
- Kich thude may; dai x r6ng x eao: 2980 x 1000 x 1450 mm.
3.3. K^t qua khao nghidm - Muc dich khio nghidm:
dd sach ciia nam sau khi nia; xac dinh nang suat nia va tieu thu didn nang, lugng niroc cho qua trinh nia.
- Ndi dung khio nghidm:
Do cong suat dpng eo bang tai khi chay khdng tai va khi chay cd tai; do eong suat bom nirbfc va may thoi khi. Luu lugng bom nude va bom khi; do then gian ngam nia naim; do cong suat tidu thu eua may;
xac dinh nang suat nia va do sach eiia nam sau khi rua; xac dinh thong sd cong nghd ciia may nia.
- Bd tri khio nghiem:
cai dat cac thong sd lam vide cua may theo cac ket qua tinh toan thiet k^.
Nguydn lidu khao nghidm la nam bao ngu tuoi sau thu hoach. Cac thi nghiem dupe l§p lai 5 lan va tinh gia tri trung binh.
- Ke't qua khio nghidm:
+Xac dinh van tdc bdng til vdt nam:
Khdi dpng bang tai vdt nam, di^u chinh bi^n tin theo cae gia tri ydu eau, dimg ddng hd do thdi gian tir khi nam dugc vot len bang tai cho d^n khi nEtm roi khdi may. Loai bidn tan su dung trong nghidn ciiu la bi^n tan ABB cd thiet k^ ho?it dgng dn dinh trong t4n sd 1 - 60 Hz dd didu khien eho dpng co 1 pha loai Torque. Ket qua khao nghiem trinh bay trong bang 1.
Kiem tra kha nang hoat dpng eua may; xac dinh
B ^ 1. T ^ sd b i ^ t ^ - v$n tdc bang tai v6t nSm - thdi gian vdt n ^ Tan sp (Hz)
Van tdc bang (m/min) Thpi gian thap lieu (s)
2 0,41 205
3 0,9 93,6
4 1,26 66,6
5 1,62 51,6
6 2,04 41,4
7 2,4 34,8
8 2,69 31,8
9 3,12 24,6
10 3,6 23,4
Tail 30 (Hz) Hinh 6. Quan h§ tin sd v i van toe th^o li^u
Nhu vay, thdi gian thao lidu ed thi tiiy ehinh phii hop vol nhu cau thue te sir dung. Can cir vao kit qua trinh bay trong bang 1 de chgn gia tri eiia biin tin.
+Xie dinh cdng suit dong co:
Khoi dpng bang tai, dieu ehinh bien tan theo cae gia tri yen eSu tuong tu nhu bang 1, sii dung ampe kim do cudng do dong dien, tir dd tinh cong suat dpng CO bang tai ling vdi mdi gia tri tan sd ciia biin tan. Kit qua trinh bay trong bang 2.
NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 12/2019 69
KHOA HOC CONG N O H |
[J^ansdJHz)_
Cdng sual khdng taiO\^
Cong suat co tii (A\-)
_Bang 2^ K6t quA do cdng suat d<ing ca bang lai_
4
136.4 I 147.4
10 123,2 ; 134.2 15-1.(1 165,0 156,2 I 173.8 Ii)3,tJ | I'OdS
• 200 J hi(
1 \w
•i -^^' 0
0 I 2 .1 -I 5 6 S 9 III 11 Tan so (Hz)
Hinh 7. Quan hd tin sd va cdng su^t ddng co bang tai thao lidu
Kdl qua khao nghidm eho thay eong suat dpng eo khi khdng tai cung nhu khi co tai deu tang khi tang lAn sd eiia bidn tan, nghia la tang van tdc ciia bang tai vol nam. Cac kdl qua trong bang 2 diing dd x.ic dinh cong suat lieu Qiu cua bang tai vdt nam tmmg ihig vdi cac diong sd van hanh eiia bang tai vot njiin. Cdng sual bang tai vot nam khi co tai dao ddng lu 88 - 20(i.8 W, gia tri nay thap hon cong suat tinh loan, nhu vfiy cong suat dong co dap img duoe yeu cAu vgn hanh cua mdy.
+ .\;/.- dfnh hni hr^mg ldn nhit ciia may bom nuoc:
Mb van chinh nuoe cr vi tri Imi lupng nude phun Idn nhat. Do lugng nuoc do bom nude phun ra trong thoi gian 60 giay. Tir do tmh duoe luu lugng nude trong 1 gid.
Kel qua luu luong trung binh thuc te cua may bom 115 b't/phut, cao ban luu lupng theo tinh toan thiet kd.
+Xac dinh luu luong Idn nhit ciia bom thdi klii:
Luu lupng ti-ung binh thuc te eua may thdi khi la 23 mVh, ldn hon luu lupng tinh toan 18 mVh dam bao dugc iuu lugng theo thiet kl.
+Xac dinh cdng suit cua miy nia nim:
Tien hanh do lan lugt eong suat tidu thu cua may bom nuoe va bom thdi khi.
Khoi dpng bom nude, do cudng dd ddng didn ciia bom nude.
Tat bom nude, khdi dpng may tlioi khi, do cudng do dong didn ciia may thdi khi.
Khdi dgng ca bom, may thdi khi, dpng co bang tai, ddng thoi chinh bien tan den nhirng tan sd chi dinh, do tong cong suat cila may nia nam.
Ket qua: cong suat may bom nude: 574 W. Cdng sual bom thdi khi: 412 W. Tdng edng suit ciia may rua trinh bay trong bang 3.
Bang 3. Tdng cdng suit cua may nia nim I Tan so (Hz) 1 _ 3 4 ' Cniig suat may nia (W) 1192 1201 Cony suat Uiue Id ciia may bom nuoc va cua bom khi nho hon eong suat tinh loan, nhu va\ da dam bao dugc ydu cau lam vide ciia dpng co khi ma>' rira boat dgng.
•h Xac dmh thdi gian nia nam:
KI161 dt.ni; bom nuoc. may diOi khi, dttnfi co bang tai. IIRU chinh vi Ui vm phun phun runjc. w \n van ihdi khi.
C ^ i n : ' ' " * ' " ™ <•»-!« ft-Heu
ddng no bs,„ „,j ^.^^ . ; ' "'-"• ^-1 ••''" dinh bang niTOT dmn.- U,,„M., !,.,„„ T"^ ™^ '"^ '' - Phun Ciia
Ki'l < | U a l l M ,.._.. ,,
va lau nhal la 3 phut JH' •' nSm nhanh nhat la
• • " • " " " ' « " I g vdi „' 25 giay lang suat 70 NONG NGHIEP VA PHAT TRIEN NONG THON - KY
KHOA HOC COHG H G H t
nia dao dpng tir 157 - 332 kg/h. Thdi gian nia cu the sd dupe xac dinh thong qua chi tieu dp ban sot cua nam sau khi riia.
+ DQ sach ctia nam sau khi rua:
Dp saeh ciia nam dugc xac dinh thong qua dp ban sot nhu cdng thiie (3). Dieu chinh cac miic thdi gian rua tang dan, thap nhat la 30 giay, sau dd lang ldn dan vdi gian each moi lin tang la 30 giay eho den khi do sgch ciia nim dat 100% thi ghi nhan gia tri thoi gian nia nay. Kit qua sau thdi gian nia 2 phut do ban sdt ciia nim bao ngu sau khi nia dat 0%, tiic dd saeh CO hoe aJa nam sau khi riia dat 100%.
Nang suit nia tuong ling vdi thai gian nay la 245 kg/h. Ty Id gay nat cua nim bao ngu sau khi qua may riia dugc xac dinh theo cong thuc (4) la 1,8%.
Nhu vay, nam sau khi rira dam bao do saeh va ty Id gay nat eiia nim theo Tieu ehuan Viet Nam TCVN 5322:1991.
•h Tidu thu dien ndng ridng va luong nude cin thidt cbo qua trinh rira:
Tidu thu di|n nang ridng cho qua trinh nia duge tinh loan theo edng Uiirc (2) tren co so' nang suit may rira la 245 kg/h. Tieu thu dien nang cho qua trinh nia bao gdm dien nang cho dgng eo bang tai vdt nim, ddng eo bom nude va dgng eo thdi khi, gia tri nay do dupe la 1,22 kWh. Nhu vay, tieu thu didn nang rieng cho qua trinh rira la 0,5 kWh/100 kg nam.
Lupng nuoe can thiet eho qua trinh nia bao gdm lugng nude cip ban dau vao day thiing nia va lupng nuoc tieu tdn cho he thdng voi phun nude nia lai bd tri tai diu cudi ciia bang tai vdt nam. Tdng lupng nuoc tidu thu do duge la 1.050 lit/h. Nhu vay luong nude can thill d l rira saeh 1 kg nam la 4.3 lit/kg nim.
4 . KET LUAN
Tren co so ydu cau thuc te ciia nganh san xuat nam saeh, nghidn eiiu da danh gia cac uu nhiKJc diem cua eac phuong phap rira hien nay, kit hop ly thuyet va thue nghiem de tinh toan thidt k l va chd 1^0 may nia nam Iheo nguyen ly "rua mdm" ed ket hpp hd thdng voi phun xdi nude rira lai nham nang cao chat lugng nim va hieu qua eua qua trinh nia.
Da thill kl, chi tao dugc may nia nam bao ngu.
Cac kit qua khao nghiem eho thiy voi thdi gian rira 2 phut, do sach co hpc ciia nim sau khi rira dat 100%, nang suit may nia dat 245 kg/h, ty le gay nat ciia
nam bao ngu sau khi qua may nia la 1,8%, bdu thu dien nSng rieng cho qua trinh nia la 0,5 kWh/100 kg nim va lupng nuoc can thilt cho qua trinh nia la 4,3 lilAg. Nam bao ngu sau khi rira dam bao vd dd sach va ty Id gay nat aia nim, dat Tidu chuin Vidt Nam TCVN 5322:1991.
TAI UEU THAM KHAO
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2. Gunde C, Cimemian A., 1995. Pleurotus fruiting bodies contain the inhibitor of 3-hydroxy-3- methylglutaryl-coenzyme A reductase-lovastatin.
Experimental mycology, Vol. 19(1): 1 - 6.
3. Trin Van Khu, 2015. Bao eao phan tieh xu huong eong nghd: hudng ling dung day chuydn nia, xii ly rau phuc vu tieu diing trong nude va xuit khau.
Trung tam Thong tin Khoa hpc va Cdng nghd. So Khoa hgc va Cong nghd TP. Hd Chi Minh, 10/2017, 35 trang.
4. Tran Anh Son, Dang Quang Ky, 2017. Nghidn ciiu thilt bi va thuc nghidm quy trinh so che rau sach. Tap chi Phat triln Khoa hgc va Cong nghd, t$p 20,sdK6-2017,87-94.
5. Tidu chuan Viet Nam TCVN 5322:1991 (CODEX STAN 38-1981). Nim an va san phim nim an. Tdng cue Tieu chuan do ludng chit lugng tham dinh, Bp Khoa hpe va Cong nghd.
6. Le Xuan Hoa, Nguydn Thi Bich Ngoc, 2015.
Bom - quat - may nen - Ly thuylt va thuc hanh. Nha xuat ban Khoa hgc va Ky thuat.
7. Trinh Chat, Le Van Uyen, 2006. Tinh toan, thiet ke he din dpng ca khi, tap 1 va H. Nha xuit ban Giao due.
8. Nguydn Trpng Hiep, Nguydn Van Lim, 1999.
Thiet ke chi tilt may. Nha xuit ban Giao due.
9. Le Anh Diic, Nguydn Hiru Hda, 2014. Xac dinh phuong phap say va che dd say nam Ddng eo. Tap chi Nong nghidp va Phat trien ndng thon, sd 19/2014,43-48.
10. Nguyin Hay, 2003. May sau thu hoaeh, Nha
NONG NGHIEP VA PHAT TRIEN N O N G THON - KY 1 - THANG 12/2019 71
KHOA HOC C A N C N C H I
xual ban Dji hgc Quoc gia TP. Ho Chi .Minh. KI may san xual Uiirc phain. Nha xuat ban Bw.i H"
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Nhu Thung bitn dich. 1976. Ca sa tinh loan va thiet
RESEARCH RESULTS OF DESIGNING, MANUFACIXIRING AND TESTING OYSTER MUSHROOM WASHING MACHINE
Le Anh Due', Bui Manh ^^an^ Vu Ke Hoach' Wong Lam University Ho Chj Minh eily -Ho Chi Mmh city Industry and Trade College Summary
The sludy aims to design, manufacture and test of a washmg machine for Oyster mushroom to improve the washioR efficiency. The results of calculation liave determined the structure and working parameters of the machine with design productivity of 200 kg/hour. Based on the result, the Oyster mushroom washing machine has been manufactured. The experimental results show tliat the machine works stably, the operaliiig paraiiielers St to the calculation resulls. The highest washing efflciency at the washing time of 2 minutes, mechanical impurities rate of mushrooms reaches 100%, the producbvity of the washing machme reaches 245 kg/h. broken raUo of oyster mushroom after washing is 1.8%, the specific energy for washing process is 0.5 kWh/100 kg of mushrooms and the amount of water needed for washing is 4.3 liters/kg.
Keywords: Oyslernmshroom. purity rale, washing Ome, speciSc electricity consumpUon.
NgttW p h ^ bi$n: TS. Nguy&i Nang Nhuvng Ngiy nhjn b4i: 14/10/2019
Ngiy thOng qua phin bl^n: 14/11/2019 Ngiy duyft dang: 21/11/2019
" NONG NGHIEP VA PHAT TRIEN NONG T H O N - K Y I T H ^ M