976 Khao sat t^c dpng cai thien tinh luu bien Phu Rdng va dau Bach Hd ciia thictj)[ j^ KHAO SAT TAG D Q N G CAI THIEN TINH LlTU BIEN DAU RONG VA DAU BACH H O CUA THIET BI NAM CHAM DAO CU C Nd Fe B Ngu[.]
Trang 1976 Khao sat t^c dpng cai thien tinh luu bien Phu Rdng va dau Bach Hd ciia thictj)[.j^
K H A O SAT TAG D Q N G CAI T H I E N TINH LlTU B I E N DAU R O N G
VA DAU B A C H H O CUA T H I E T BI N A M C H A M D A O CU C Nd-Fe-B
Nguyen Phuang Tung
Phdn viin Khoa hgc Vdt lieu tai Tp Hd Chi Minh
Nguyen Anh Diing
Trung tdm Nghiin ciru vd Phdt triin Chi biin Ddu khi
TOM TAT
Cdc thir nghiim nghiin cim khd ndng cdi thiin tinh luu biin cdc mdu ddu Rdng RP3
vd ddu Bgch Hd CTP2 cua thiit bi tgo tir trudmg b&i nam chdm ddt hiim Nd-Fe-B cd cdu hinh ddo cue da dugc thuc hiin trong vung nhiet do 35°C din 45°C, khi ddng ddu la chdt ldng phi Newton Cdc kit qud thu dugc cho thdy, ddi v&i ddu Rdng RP3, hiiu qud cdi thiin tinh luu biin rdt rd ret, trong cdc nhiet do khdo sdt, v&i cu&ng do tir trudng la 0,8T, th&i gian chiiu tu la 2 gidy, do nh&t ddng hgc, do nhcrt dio vd img sudt trugt gidm tuong ung la >40%, 25 - 50% vd 35 - 45% Ddi v&i ddu Bgch Hd CTP2 tinh luu biin dugc cdi thiin rd nhdt Id & nhiet do xu ly 40°C vd 45°C v&i su gidm do nh&t ddng hgc, do nh&t deo
vd img sudt trugt Id 40 - 60%>, 45 - 55% vd 8 - 30% Qua nhung so sdnh bu&c ddu cho thdy thiit bi nam chdm ddo cue tdc ddng cdi thiin tinh luu biin cua ddu thd & viing chdt long phi Newton tdt han so v&i cdu hinh nam chdm thdng thucmg
Ddy la mdt hudmg an todn, thdn thiin v&i mdi trudmg biin, khd thi vi mat cdng nghi
vd kinh ti di gdp phdn xir ly ddu thd trong qud trinh khai thac ngodi gidn, nhdt la ddi v&i ddu Ignh
GIOI THIEU
Dau th6 Viet Nam la loai dau chiia nhieu paraffin, co nhiet do dong dac cao nen thuong xuyen xay ra hien tugng ket tinh va lang dong trong cac gieng, cac duong 6ng khai thac, he thong 6ng dan va cac bg phan bam hiit Dieu nay lam giam kha nang khai thac, gia tang chi phi ngan ngua, khae phuc sir c6, nhat la d6i voi cac mo dau phat trien kh6ng d6ng bo va he th6ng duong 6ng van chuyen dau nam tren day bien kh6ng dugc bao 6n
De dam bao an toan cho cac duong 6ng va tang nang suat khai thac dau, viec nghien ciiu cac yeu t6 anh huong den qua trinh ket tinh va lang dgng paraffin cung nhu cac phuong phap de xii ly van de nay dugc cac nha ky thuat dau khi quan tam dac biet Tai nuoc ta, cho den nay, phuong phap sii dung phu gia boa hoc la th6ng dung va hieu qua hon ca Tuy nhien, qua thai gian khai thac, dau cang truong thanh va cung voi hien tugng ngap nuoc, dau cQng se nguoi din Phuong phap sii dung phu gia doi hoi gia nhiet de phu gia CO the hoa tan trong diu dam bao hieu qua tac dong Ben canh do, cac yeu cau ngay cang nghiem ngat dl bao ve m6i truong biin trong khai thac, van chuyen dau khi ciing la mot nhan t l quan trong thiic diy viec sir dung cac phuong phap kiem soit lang dong paraffin hieu qua va than thien voi m6i truong hon Cac thiet bj tu truong tren co so nam
Trang 2Juyen tap bao cao Hdi nghj KHCN "30 nam Dau khi Viet Nam: Co' hdi mdi, thach thuc mdi" 977
cham Nd-Fe-B co thi thay thi mot phin phu gia boa hgc dl giam ling dong, cai thien tinh
luru biin cua diu th6 la mot huong huu hieu da dugc nhom tac gia nghien ciiu trong nhiing
nam gin day [1-6] dl tim kilm co hoi dua ra ung dung a cac gian khai thac dau ngoai
khoi
Trong bao cao nay chiing t6i trinh bay tac dong cai thien tinh luu bien, giam lang
dong dii voi cac miu diu Bach H6 va R6ng cua thiet bi tu truong voi nam cham Nd-Fe-B
dao cue
CO s o CUA PHirONG PHAP, LY THUYET VA MO TA THIET BI
Co so cua phuong phap xu ly tu truong la dung mot thiet bi tao tu truong, thuong la
tren co so nam cham vTnh cuu pha dat hiem, co cau hinh phu hgp de lap n6i tiep a mot
khoang thich hgp giiia 6ng khai thac hoae tren dau gieng, de cho dong dau di qua viing tu
truang co nhiet do can thiet, dam bao hieu qua xii ly t6i uu
Ly thuyet giai thich anh huong cua tu truong trong viec cai thien tinh luu bien ciia
dau th6 cho den nay van moi ehi la nhiing de xuat Nguoi ta nhan thay rang tu truong
kh6ng chi co tac dung giam do nhot ciia dau ma con co tac dung ban che hien tugng lang
dong cac hgp phan v6 co, hiru co trong he keo phan tan la dau tho
1 Lang dong vo co"
Tac dung ciia tu truang len cac hgp phan v6 co rat ro rang va nguyen nhan cua
tac dung nay chinh la lire Lorenz Luc Lorenz la lire tuong tac ciia tir truang voi cac
hgp phan v6 co mang dien dang chuyen dong theo chieu thang goc voi huong ciia tir
truang Duoi tac dung ciia lire Lorenz, cac lop dien kep ciia cac tieu phan bi bien d6i
ve dien tich tai cac be mat phan each dang trugt len nhau (mat phang trugt Hemholtz) Do do, tu truang anh huong den tuong tac giiia hat va hat, ciing nhu giiia
hat va chat long solvat boa, thay d6i each tao tinh the hoae s6 hydrat boa tren cac
phan tii chat lang dgng
Tuy nhien, theo cac tinh toan dua tren ly thuyet lap dien tich kep, cac tac gia [7]
da dua ra m6 hinh ly thuyet cua sir trung hoa be mat do sir dich chuyen cac ion tu
dung dich ve phia be mat cac hat nhu la nguyen nhan tac dong ciia tu truong tren cac
vi hat phi tu Hien tugng nay gay nen sir xao tron qua trinh ket tinh va phat trien cac
dam tinh the mu6i trong dung dich, dan den sir lic che lang dong cac mu6i v6 co
2 Lang dong hiru co"
Hien nay chua co sir th6ng nhat trong viec giai thich tac dong lie che lang dong
paraffin cua tu truong C6 the chap nhan hai each ly giai nhu sau:
Cac phan tu paraffin du co do tir tham rat thap, khong phan cue nhung trong dau,
khi hinh thanh mang tinh the, chiing co sir ket tu voi nhirng tieu phan khae mang
dien nhu cac phan tir asphanten, cac mu6i v6 co va nuoc bien di ciing Duoi tac
dong cua tir truong nhung tieu phan nay nhilm tir, dugc sap xep lai, bao boc
xung quanh cac tinh thi paraffin, lam cho cac phin ling dong tron ban, giam sire
cang bl mat, dl dang trugt len nhau, lam giam do nhdt ciia diu; ding thai nho
lire day giira cac phan tu phan cue gilng nhau, lam giam xac suit gap nhau giira
cac tieu phan, lam giam sir kit tu, giam ling dong
Trang 3978 Khao sat tac dgng cai thien tinh luu biin Bau Rdng va d5u Bach Hd ciia thigt bj
- Kh6ng thi ap dung lire Lorenz dii voi ling dong paraffin dl giai thich tuong tac giira tir truong va cac phan tir phi tir Rocha va n.n.k [8] dl xuit la khi dau th6 chay ngang qua vimg co tir truong thich hgp, cac phan tir paraffin co khuynh huong sip xip lai cac cue cua chung theo huong cua tir truong trong dieu kien chuyin dong nhiet kh6ng qua manh Tac dong cua tir truong len cac phan tir nay
se thay dii kilu quay va tinh tien ciia cac electron, din din sir thay d6i momen goc va van dao cua chung, gay nen sir xao tron trong qua trinh ket tinh paraffin Thuc ra, duoi anh buong cua tir truang, cac phan tir paraffin co mot luong cue ylu Chinh luong cue nay da tao nen mot lire day giiia cac phan tit paraffin, lam thay dii hinh thai ciia cac phan tir paraffin, thay d6i tinh luu bien cua dau th6 Tuy nhien, tuong tac giira diu th6 va tir truang kh6ng chi phu thuoc vao chinh cac tinh thi paraffin ma con phu thuoc vao nhieu phan tir phan cue khae hien dien trong diu th6 Tac dong cai thien tinh lim bien cua dau th6 bai tac dong cua tir truang vao cac phan tir nay da dugc trinh bay truac do Ciing chinh nha tir truong, cac mam tinh the paraffin ket tinh trong dau se bi phan tan trong dong chay thay vi tren thanh 6ng
3 Mo ta thilt bi
Da CO nhieu c6ng trinh c6ng b6 ve nhirng thir nghiem cai thien tinh luu bien cua dau th6 bang tir truang tren co so nam cham vTnh ciru pha dat hiem [1-6, 8] va nam cham dien [9] Diem khae nhau chinh cua hai loai thiet bi nay la tir truang tao ra bai nam cham dat hiem th6ng thuang khong co sir thay d6i huong con dien tir truang
CO the tao ra tir truang voi sy thay d6i tan s6 rat lan va huong ciia tir tuang ciing lien tuc xoay theo Dieu nay dan den nhirng ket qua thir nghiem tren dau th6 rat kbac nhau D6i voi loai thiet bi dau, do nhot va lang dong ciia dau sau xir ly giam dang ke nhung cho den nay van chua ghi nhan dugc su giam nhiet do d6ng dac cua diu Dii voi thiet bi dien tir truang, tac gia Phiing Dinh Thuc [10] da ghi nhan dugc sir giam nhiet do d6ng dac, giam lang dong rat ro ret sau khi cho dau chay qua thiet bi tir truang xoay chieu ket hgp voi gia nhiet Tuy nhien, kh6ng thiy ghi nhan sir thay dii
do nhot trong cac thi nghiem nay
Tren co so cho rang thiet bi tao ra tir truang xoay chilu bing nam cham dien rat kho dugc iing dung tai gian khai thac diu ngoai khoi do dac dilm clu true va van hanh cua chiing, chiing t6i dua ra thir nghiem cai thien tinh luu biin cua diu th6 bing thiet bi tir truang tren co so nam cham Nd-Fe-B clu hinh dao cue d l khao sat tac dong ciia tir truang len cac dac trung quan trong cua diu th6 khi 6 trang thai chit long phi Newton nhu do nhot deo, irng suit trugt, nhiet do dong dac, kha nang ling
dong, V.V
Thiet bi tao tir truong dao cue, dugc cbl tao tai Vien Khoa hoc Vat lieu - Vien Khoa hoc va C6ng nghe Viet Nam, co nguyen ly clu hinh nhu sau:
Trang 4Juygn tap bao cao Hdi nghj KHCN "30 nam Phu khi Viet Nam: Co' hdi mdi, thach thiic mdi" 979
F^
dp
jr=c>
I ^
v///// , >//y.'////// /J /V
Ook-A H-V-i .LJ^f^
! / / > / - / / / ^/•Z / Z-/-,;:.-Z
I =^
s i z _ _ j k J ,^ , A S ^
':r^::.'x 'XV \ v \ l \ ^C'r^-x"^'''vV V'A Vx'-cK ,^.:::,<J:S
r' ( 0 - I O "- 'V•^J
Hinh 1: Mieu ta nguyen ly cau hinh thiet bj nam cham dao cue
Nhu tren Hinh 1, voi cuong do tir truong c6 thi thay d6i tir 0,6 din 0,8T, trong doan 6ng dai 30cm, sir dao cue dugc thuc hien 3 ian
THIET BI VA HOA CHAT
1 Thiet bi
•
Mieu ta va van hanh he th6ng nghien cim anh huong cua tir truong boi thiet bi nam cham dao cue da neu tren len dong dau nhu da dugc trinh bay [2]
- May do luu biin Brookfield DVIlf (My)
Binh on nhiet chuang trinh hoa Brookfield TC-100 (My)
2 Hoa chat
Cac mau dau Bach Ho CTP2 va R6ng RP3 dugc cung cap boi XNLD Vietsovpetro
KET QUA VA T H A O LUAN
Cac ehi tieu ly boa chinh cua cac mau dau RP3 va CTP2 da dugc trinh bay tai c6ng trinh [4] vai RP3 co nhiet do s6i la 31°C, ham lugng paraffin, nhua, asphanten tuong img
la 22,94, 9,45 va 4,02; diu Bach H i CTP2 co nhiet do s6i la 32°C, ham lugng paraffin, nhua, asphanten tuong img la 26,34, 1,94 va 0,08
Cac mau dau dugc khao sat a cac nhiet do khae nhau, voi cac thdi gian chilu tir khae nhau va co sir so sanh vdi cac miu diu xir ly tren thilt bi nam cham Nd-Fe-B co ciing cudng do tir trudng nhung hudng tir trudng bit biin
Trang 5980 Khao sat tac ddng cai thien tinh luu bign Phu Rong va dhu Bach Hd cua t h i e t ^
L Xir ly mau dau Rong RP3
a Khdo sdt tdc dpng cdi thiin tinh luu biin
Cac kit qua thir nghiem tren mau dau
trinh bav tai cac Hinh 2-^7
Nhl^t i5$ xir ly36°C ThWgianchi4utip2s
ddu RP3 theo nhiet do xu- ly tw
RP3 theo cac nhiet do xir ly kbac nhau dugc
50
5r40
o
20
-MiuTr§ng -Xi>lytif ;
10
30 31 32 33 34 35 36 37
Nhi^t dOCC)
Hinh 2: Do thi do nhot cua mau dau
RP3 xir ly ff nhiet do 36°C
30 31 32 33 34 35 36 37 38 39 40 41
Nhi$t(J«{oC)
Hinh 4: Do thi dp nh6t/nhi?t dp cua
miu dau RP3 xiir ly 6* nhift dp 40"C
Hinh 6: Do thi dp nh6t/nhi?t dp cua
mau diu RP3 xu ly 6 nhi?t dp 45"C
D w n g cong l i m bifen d i u RP3 ThW gian chlAu tif 2»
300 ^
250 J
I 200 J
1 ^®°
"3 100 •
E
so
0
nastlc viscosity: 156.3 cP YleW Stress: 90 95 dyn/cnC
istic vl9COSity:113.3cP Yield Stress: 57.96 dyn/cmZ
V.4n t6c w i n dang{S-l)
- ^ * u TrSng — • — Mg+sboQ+izsl
1 2 0
Hinh 3: Dircmg Iiru bien cua mau dau RP3 xu ly ff nhiet do 36°C
xo
I 203 ^
S 150 4
€>u o'ttg con(j luu bl^n d^u RP3
Mlll*td8f Slffli'40'i::
Haili: !»lJOOTl6':l5S.3cP
1 ItM e t e ff : 90 S5 dyt^'cm;
CVllOitlfrlllSCP
Yield Clrsf f : 7 5 S 6 aynlaiii
tO 6D 8 0 » t j i : ti>m darnji C - 1 •
.aajitnv .t.\l*eO(Xi*2t
Hinh 5: Duong luu bien cua mau dau RP3 xu ly ff nhiet do 40°C
3C0 ,
Ou o'n0 oong tu u tfl^li <jSu PP3
l l t i l i t d * tu;i;,-45 C
nas I c vb CDf liy: 156.3 c P
t > l i i O » e j i ;90.?t5iJyr*'crn2
Plaeir y ! i c o i » / s s S c P
I ItM 0 > f r ; : 3 D T « d / r \ a n :
•0 "iO so lOO
Sn Viz no- .)«» > I,
Hinh 7: Duong luu bien ciia mau dau RP3 xu ly o nhiet do 45*'C
Trang 6J ^ ^ J | p J ) a o cao Hgi nghj KHCN "30 nam D^u khi Viet Nam: Co hdi mdi, thach thuc mdi" 981
Qua cac kit qua dugc trinh bay tren cac do thi nay ta thay hieu qua cai thien luu biin ciia cac mau RP3 dugc xir ly bang tir trudng dao cue co cudng do 0,8T rat ro ret Tuy nhiet do xir ly khae nhau nhung ca d 3 che do nhiet, do nhdt dong hoc ciia cac miu diu sau khi xir ly diu giam hon 40% d nhiet do do 31°C, do nhdt deo giam tir 25 - 50% va img suat trugt ciing giam tir 35 - 45%) Do ban che ciia thiet bi nen chua do dugc do nhdt d nhiet do dudi 3l'^C Sap tdi, vdi thiet bi do luu bien tit ban, vin dl nay se dugc khic phuc
b Khdo sdt tdc dgng cdi thiin tinh Iwu bien ddu RP3 theo th&i gian chiiu tir
Cac kit qua khao sat anh hudng cua thdi gian chilu tir (2, 4, 6 giay) din sir cai thien
do nhdt cua cac miu dau RP3 dugc trinh bay tai cac d l thi (Hinh 8 - 10)
55
50
45
40
oT
•a
= 30
•
<o-a
25
20
15
10
Anh hifffng thiiiigian c h i S u t i J I e n do nh(MciJj d j u RP3 Nhi6t dd xi> ly 36°C
Cu'ii'nsd6 8000G
- M 5 U trang
- Thoi gian chieu lir 2s
- Thc/i gian chi^u lir 4s
- Thin gian ch^u li> 6s
r '
55
50
45 _ 4 0
Q
25
20 I
15 J
10 i
I
Anh hifcrng thij'i gian chilu tip len dp nhM cua diu RP3 Nhi^t dft xip ly 40°C
yCu«ng d6 8000G
• - - Miu trSng
•—Ttiaigenchieu til'2s
J lir 4s r6s
o
31 32 33 34
NJi^i dp {°q
l^iel do {°C)
35 36
Hinh 8: Anh huong cua thoi gian chieu
tu len do nhot cua dau RP3, nhiet do
xu ly Se^C
Hinh 9: Anh huong cua thoi gian chieu
tu len do nhot cua dau RP3, nhiet do
xu ly 40''C
55
, 50 '•
j
i 45 i
<0
1.35
; 30
1
25
20
15
10 '
*^ Anh hu^fig th6i gian chiiu tii" lin Ct> nh6t ciia diu RP3
Mli«tlI6ii>ly45"C
\ Cir&ng att MOOG
\
i ^v
'-"••••• M ^ t r ^ n g j
,., ihcri gian chieu tir 2s'
- • Thoi gian chi^u ti; 4s -•••••• Thoi gian chieu ti>6s
^
~ ^ » ^ ^ = ^ s , = , _ _ „
33 34
tiiieUoCC)
Hinh 10: Anh huo-ng cua thoi gian chieu tir len
do nhot cua dau RP3, nhiet do xu ly 45°C Qua cac Hinh 8 - 1 0 nhan thiy, nlu keo dai thdi gian chilu tir tir 2 den 6 giay, do nhdt cua mau dau RP3 xir ly tir tiep tuc giam Tuy vay, su giam nay cung chi trong khoang
Trang 7982 Khao sat tac ddng cai thien tinh luu bien Phu Rong va dau Bach Hd c u a j h j g j j ^
5 - 15% tuy theo nhiet do xir ly Do vay, thdi gian chilu tir 2 giay la co the chap nhan dugc
2 Khao sat tren mau dau Bach H6 CTP2
a Khdo sdt tdc dgng cdi thien tinh Iwu biin ddu CTP2 theo nhiet do xw ly tw
Cac Hinh 11 ^ 16 trinh bay sir thay dii do nhdt cua cac miu dau Bach H6 CTP2 sau khi xir ly tir Co thi nhan thiy ring co sir khae biet ro ret so vdi cac ket
qua thu dugc trudc day khi xir ly tir mau diu Bach H I CTP2 [2, 4] Ngoai trii' mau
dau dugc xir ly d nhiet do 35°C it co sir cai thien tinh luu biin, hieu qua xir ly tir d nhiet do 40°C va 45°C la rit ro ret, dac biet la d 45"C 6 40''C hieu qua cai thien do nhdt dong hgc, do nhdt deo va irng suat trugt tuong irng la: 40, 45 va 8%) Tuong tu nhu vay, d nhiet do xir ly 45°C ghi nhan dugc su cai thien cac th6ng s6 tuong u'ng la: 60, 55 va 30%o Sir khae biet thu dugc nhu tren co the dugc giai thich dua tren ban chat cua mau dau Bach H6 CTP2 co nhiet do d6ng dac la 32''C, ham lugng paraffin ran la 26,34%o, ham lugng nhua va asphanten rat thap Khi xir ly d nhiet do 35°C, nhiet do nay kh6ng dii de lam nong chay hoan toan cac phan tir paraffin ran, vdi rat it ham lugng nhua va asphanten, nhiing chat phan cue boat dong be mat tu nhien, kh6ng dii de phan tan va bao boc quanh cac phan tir paraffin ran chua nong chay het nen sir sap xep lai chung dudi tac dong ciia tir trudng bi ban che nen kh6ng ghi nhan dugc hieu qua dang ke ve sir cai thien tinh luu bien O cac nhiet do xir ly cao hon, paraffin ran nong chay hoan toan hon trong khi chuyen dong nhiet chua dang ke so vdi su sap xep lai trong tir trudng nen tac dpng ciia tir trudng thu dugc rat ro ret D6i vdi cac mau dau RP3, tuy co nhiet do d6ng dac 31°C, cao gan bang CLia CTP2 nhung t6ng ham lugng nhua va asphanten cao gap ban 6 ian nen chiing lu6n thuc hien vai tro phan tan, bao boc cac phan tir paraffin, dan den co sir nhiem tir de dang va tai sap xep hieu qua khi chay qua viing tir trudng
55
50
45-40
?35
•»30
.»25
o
20
15
10
5
Ml iet do xi> ly se'c
t Thdi gian chieu tip 2s
\ I — • — Miu Trang
N \ I—•—Xiflytip
Nhiet d6(°C)
250-^ 200
g 150
%
b'
t
100= 60
-0
DuKjfng cong \mi bidn d'Su CPT2
Th6>i gian chiiu tir 2s
^ ^ ^ - ^
^ ^ ^ ^ ^ ^ ' " ' ' ^
3 20 40 60 80 100
van tiic bi^ndang(S-l)
1 —•— Kfeu TrSng - • — l^+800G+2s !
120
Hinh 11: Do thi do nhot cua mau
dau CTP2 6 nhiet do 35°C
Hinh 12: Duong luu bien ctia mau dau CTP2 ff nhiet do 35"C
Trang 8Juygn tap bao cao Hdi nghi KHCN "30^namJHuJ<hiyigt Nam: Co' hdi mdi, thach thiic mdi" 983
60
55
50
45
ar40
o
=35
:|30
.^25
15 I
10 \
5
4-Nhi^t d^ xu> ly 40°C Thoi gian chieu tir 2s
-Mau trang I -XCflytCi' I
Nhiet <lo(°C)
38 39 40 41
Hinh 13: Do thj do nhot ciia mau dau
CTP2 6 nhiet do 40°C
60
55
50
45
s:4o
o
•§ 30
'S'25
20
15
10
Nhi^ta$XLPly45''C Thd"! gian chilu tip 2s
-•—MSu Tring i -•— Xi> ly to
^ • i i
30 31 32 33 34 35 36 37 38 39 40 411
Nhi?t dpCC)
Hinh 15: Do thj do nhot ciia mau dau
CTP2 6 nhiet do 45°C
^ 2 0 0 ^
•§• 150
OiKrng cong ILFU bi^n d^u CPT2 Hnm 06 xir ly ACC
Rastc viscosity: 128.1 cP Yield Stress:75.33 dyn/cm2
ICO Rastic viscosity:66-1 cP
Yield Stress: 69,75 dyn/cmZ
50 -i
20 40 60 80 100
Vant6cbifendang(S-1)
120
- ffeu TrSng • - t^+800G+2s
Hinh 14: Duong luu bien ciia mau dau
CTP2 6 nhiet do 40''C
250
^ 200
Oirong eong li/u bien dau CPT2 Nhiet dp xip ly4S»C
Rastic viscosity: 128.1 cP Yteld Stress:75.33 dyn/cm2
150
100
Rastic viscosity:53.8 cP Yield Stress:50 99 dyn/cm2
20 40 60 80 100
V.ant6cbi#ndang(S-1)
I — • — Nfeu Tring — • — Mg+800G+6s
120
Hinh 16: Ducmg luu bien cua mau dau
CTP2 ff nhiet do 45''C
b Khdo sdt tdc dgng cdi thiin tinh Iwu biin ddu CTP2 theo th&i gian chiiu tir
Theo cac ket qua dugc trinh bay trong cac Hinh 17-^19 dudi day, co the nhan thay rang, kbac vdi dau RP3, su keo dai thdi gian chieu tir tir 2 - 6 giay tren dau
CTP2, ngoai trir d nhiet do xir ly 35°C c6 su giam do nhdt them khoang 30%, hau
nhu kh6ng co them hieu qua cai thien do nhdt dong hoc d cac nhiet do xir ly con lai Dieu CO the ly giai nhu da thao luan d phan 2(a) d nhiet do 35°C thdi gian chieu tir
2 giay chua dii de c6 sir sap xep hieu qua, cai thien do nhdt ciia dong dau CTP2 Keo dai them thdi gian chieu tir giup cho do nhdt tiep tuc giam Con d cac nhiet do xir ly 40 va 45°C, hieu qua cai thien do nhdt gan nhu da dat dugc toi da sau 2 giay chieu tir
Trang 9984 Khao sat tac ddng cai thien tinh luu bign Phu Rdng va dhu Bach Hd ciia thiet bj
60
55
-50
45
-t ^
* 30
2 0
15
10
5
A n h h m > n g ttidi gian chi^u tip I6n d $ n h 6 t cua dku CFT2 M<l«t ai >i> ly 3E°C
Cit&ng ai eoooG
~ K ^ u t r ^ n g
- Thfiri gian chi^u tu" 2s
- Thb-i gian chi^u tt> 4s
ctii^u tif 6s
Mli^t di> ( " O
6 0 T
1
5 5 ^
50 i
Anh huOTg t h o i gian c h i i u tip I6n d? nh<H cua d i u CPT2
^ 4 0 ' C
»8000G
l \ ^ u tr^ng Ttie>igianciii^utu'25 Thd^igian ctiifiu tu-4s
Thoi gian chteu lu 6s
33 34 Mli^t ao (»C)
Hinh 17: Su cai thien do nhot ciia mau
diu CTP2 theo thffi gian chieu tir, xu ly
ff nhiet do 35°C
Hinh 18: Su cai thien do nhot ciia mau dau CTP2 theo thoi gian chieu tir, xir iy ff nhiet do 40"C
60
55
50
45
40
fi:
a 35
I"
25
20
15
10
A n h hu'O'ng t h o i gian c h i i u tir ldn d ^ n h o t cua d i i u RP3 ( « i i ^ t d 6 xi> ly 45»C
Cu-d-ng afy 8000G
- M 3 U t r i n g
- Tbdi gian c h i i u tir 2s
- TTtiri gian c h i i u t u 4s
- Th&i gian c h i i u tir 6s
Nhi«t ao (°C)
Hinh 19: Su cai thien do nhot ciia mau dau CTP2 theo thffi gian chieu tu, xu iy ff nhiet do 45''C
c So sdnh hiiu qud cdi thiin dp nhdi cdc mdu ddu CTP2 b&i tir trw&ng cua cdc nam cham CO cdu hinh khdc nhau
Trong phan nay hai thiet hi tir trudng co cac cau hinh nam cham kbac nhau dugc sir dung, do la nam cham dao cue va nam cham 2 cue th6ng thudng Cac nam cham nay d^u
la nam cham Nd-Fe-B, cudng do tir trudng dugc sir dung d^u la 0,8T Cac kkt qua so sanh hieu qua cai thien do nhdt cac miu dku CTP2 d cac nhiet do xir ly kbac nhau dugc trinh bay trong cac Hinh 1 8 - 2 0 Nhin chung, co t\\k thay rSng tir trudng ciia nam cham dao
cue cai thien do nhdt cua cac mau dau co phan t6t hon so vdi tir trudng kh6ng doi hudng
ciia cau hinh nam cham th6ng dung Tuy nhien, dk dinh lugng dugc hieu qua cai thien, cin
thirc hien them nhieu thir nghiem nira va cac phuang tien do dac, danh gia cin phii hgp ban
Trang 10TjjygnJip bao cao Hdi nghi KHCN "30 nam Phu khi Viet Nam: Co' hdi mdi, thach thiic mdi' 985
60
50
_ 4 0
0
(J
* 30
c
<5-Q
20
10
0
29
N h i i t <36 xi> ly 35°C
\ \
30 31 32 33
— • — M i u T r i n g
— • — Tir trudrng Xo^n
—A— Tii" tTLK/ng <5eu
• ^ ^ «
34 35 36
N h i i t 3 6 (°C)
37
70
60
50
s:
^ 4 0
S 3 0 •
O
20
10
0
29
\
30 31
Nhiet d o
\
\
32
XLC ly 40°C
— • — MSu Trjng
^ — • — Ti> truang Xoan
V — * — Ti> Irirong <Jeu
^ ^ ^ ^ ^ ^ ^ ^ • k ^ ^
^*^~^-»- " a —
33 34 35 36
N h i i t d o (°C)
:i A
37
Hinh 20: Su cai thien do nhot boi tir
truffng ciia cac nam cham co cau hinh
khae nhau, nhiet do xu ly 35°C
Hinh 21: Su cai thien do nhot boi tu truong cua cac nam cham co cau hinh khae nhau, nhiet do xii' ly 40°C
70
60
50
a 40 •
'1
1 3 0
a
20
10 :
0 •
29
30 31
Ntii?t ap
,
xu- ly 45°C
32 33
N h i e t d o
— • — M i u Trang
— • — Ti> t r u a n g Xoan
— i l l — Ti> t r u a n g deu
\^Nk ~"*\
34 35 36
(°C)
*
37
Hinh 22: Su cai thien do nhot boi tir truong cua cac nam cham
CO cau hinh khae nhau, nhiet do xu ly 45°C KET LUAN
• Thiet bi nam cham dao cue c6 cudng do tir trudng la 0,8T co kha nang cai thien ro ret tinh luu bien ciia cac mau dau thir nghiem trong viing nhiet do xir ly la 35°C, 40°C va45"C
• Vdi thdi gian chieu tir la 2 giay, dau MP3 sau khi xu ly d ca 3 nhiet do tren, co su
giam do nhdt dong hoc, do nhdt deo va ung suat trugt la > 40%, 25 - 50% va 35 - 45%
• Vdi thdi gian chieu tir la 2 giay, dau CTP2 sau khi xir ly, co su giam do nhdt dong hoc, do nhdt deo va img suAt trugt la 40 - 60%, 45 - 55% va 8 - 30% d nhiet do xir ly la40va45"C
Day la mot thiet bi an toan va gop phan bao ve m6i trudng bien, kha thi ve mat c6ng nghe va kinh te de img dung xir ly dau ngoai gian khai thac, nhat la d6i vdi dong dau lanh