Thong tin khoa hpc cong nghe m o
UfNG DUNG PH^N MEM MfiTLfiB
MO PHONG QUA TRINH BIEN THIEN SUAT TIEU THU DIEN NANG CUA BANG TAI
sur dung trong mo than ham 16
In the actual production, the determination of the specific energy consumption for the mining equipment has been considered as a very difficult task The software MATLAB could be useful in simulating the variable process of the specific energy consumption, corresponding to the assumption based on the actual conditions of the underground coal productio
ThS, VU THfe NAM KS, T R A N T R U N G H i t U KS, PHAM THANH LIEM K S . L E ' Q U A N G T U A N Viin Khoa hoc Cdng ngh6 Mo - Vinacomin
1 . T o n g q u a n v e s u d t t i e u t h u d i e n n a n g Suat tieu thy d i e n n a n g ( S T T D N ) la gia tn v l m d c tieu thy dien n a n g d e s a n x u l t ra mpt d a n vi san p h a m . D o i v d i cac d a n vj trong n g a n h m o thi S T T D N c 6 n la chi t i e u t o n g h g p d e lap k l hoach hang n a m v l n h u c a u s d d y n g dien n a n g , ngoai ra c 6 n lam c o n g c u c h o v i e c g i a m sat, phan phoi v a q u a n ly l y d i dien va t h i l t k l cung e l p dien cho cac m o t h a n .
S u i t tieu thu dien nang cua b a n g tai d y g e tao nen t d ba y e u to:
- Tieu thy dien nang t r o n g q u a t r i n h qua dp cua thiet bi: k h d i d p n g co tai, h a m n g y g e hoac h a m d p n g n a n g .
- Tieu t h u dien n a n g t r o n g q u a trinh bien doi CO q u a n he v d i eae y l u to
+ Dac tinh ky thuat cua t h i l t bj.
+ D a c d i e m c u a c o n g n g h e . + T i n h chat n g u y e n vat li$u.
+ S o l y a n g v a chat l y g n g s a n p h a m : y l u to nay ty le t h u a n v d i so l y g n g san p h l m .
- T o n that dien nang khi v a n h a n h : k h o n g p h y t h u p e v a o s o l y g n g s a n p h a m m a no chi p h y thuoe v a o hai y e u to
+ C o n g s u i t k h o n g tai T o n t h I t dien n a n g nay ty le t h u a n v d i c o n g s u i t k h o n g tai
+ T h d i gian chay may.
2. L f n g d u n g S i m u l i n k M a t l a b m o p h o n g b i l n t h i e n S T T D N c u a b a n g t a i s d d u n g t r o n g m o t h a n h i m 16
D i e n nang tieu t h u eua b a n g tai t h a y d l i c h u y e u t h e o b a y e u t o t h y e t e la: c h i l u d a i , g o c d i e v a n a n g s u a t b a n g . D l t i m h i l u a n h h y d n g t d 3 y e u t o d o ta t i e n h a n h x a y d y n g m o h i n h . C a c b y d e t i e n h a n h m o p h o n g d y g c t h e h i e n t r e n h i n h 2.
2.i Xay dLPng mo hinh
D I xay d y n g m o h i n h t i n h t o a n b a n g Simulink, t r y d c h i t p h a i x a y d y n g d y g c c a c h a m t o a n hpe m o ta q u a t r i n h t i n h t o a n S T T D N .
CAc bu6c USn h^nh ma ph6ng SSi tumg
tJijing bSng cdchSm lOcinhoc
Nh$p thAngstf
inkdtquS
X- Qui trinh qui dd;
Y - Qui trinh biSn dSi (ho^t d0ng cd tii);
Z - Qui trinh v$n hinh khdng tii \ ^ / Hinh 1. Bieu do chu trinh lim vi$c cOa bang tii Hinh 2. Cic bw&c tien hinh md phdng doi tu^ng
KliCiN.M M) 7-2012-* CO DIEN - T U D O N G HOA
W'
Thong tin l<hoa hgc cong ngh# mo
* Nang suat dinh miK cua bang chuyen:
Q,^=kJ^,,B\v.cl,llk, (1)
Trong d6:
kic - He so nay dygc tinh vdi goc t y chay (42") cua than,
A, = 5 7 f ) . / i ' ( — ) = 2 2 l
kgd - He s6 tinh d i n anh hydng giam nang suit do goc die;
B - Chieu rOng day bSng, m;
V - Toe do day bang, m/s;
d - Trpng lygng t h i tieh eua than van tai trfin bang, t/m^;
* Tai trqng than trin mpt m6t dii bing.
g^^^kG/m (2)
Trong do
Qbc - Nang suit ttii/c te cua bang chuyen, t/h, V - Toe do bang taj. m/s:
' Trong iw^ng 1m diii cua diy bang.
Trpng lu'p'ng n^y ta c6 th^ tinh b^ng cong thCfc sau ho^c c6 t h i diing ao dem thMic t l d l xic dinh trpng lu'png 1 m dSy bing.
g„ = l,l /!(l,25./+rf'W),iG/m ,3) Trong d6'
d' - Chilu dSy m§t d a * v6 bpc, mm, ( / " - C h i l u day mSt trdn v6 bpc, mm;
i - S6 idp;
* Trong iwt?ng dii cua cic con lin thuQC nhinh c6 tii vi khdng til
Trong d6:
Gp, Gx- Trpng iu-p-ng p h l n quay cua cac con ISn nhSnh co tai va nhSnh I<h6ng tai,
U, U - Khoang each giiJa cic con ISn nhSnh c6 tai vd nhcinh khong tai
• Si>c cin Ihinh phSn cua nhinh khdng tai.
Fi-2 = (go + g,)L„c<isPgoUnP, kG; (5) Trong do
&-ffl
QlK Gocdo«
go (P P I.
r i - 2 F3-*
FO QW P
Ptt
Ndng suit bang lai Tai trpng than tren Im Aii Trong l i r ^ g Im dai cua day bang
Trpng luvng Im dii cua d£y bang nhinh cA tai Trong luwng Im dai cua day bing nhanh khong tai Sire can thinh ph£n nhinh kbdng l i i
Stfc can thanh phan nhanh co tai L ^ k^o cua bing tii
C6ng su^t yeu ciu ciia bing tai
Cong suat thyc le Suat lieu thu
=s-
| B i l u d 6 s u i t t i a u thy Bilu de sin luyng thyc ti
c
Hinh 3. Sc do khoi mo phong bing matlab tinh toan bien thien STTDN ciia bang tai md.
KHCNM S 6 7/2012» CO D l t N - TUOONG H 6 A
Thong tin khoa hoc cong nghe mo
Fi.2 - Sdc can thanh phan nhanh khong tai, L - Chilu dai bang tai, m,
P - Goc die dat bang tai, dp CO - He so sdc can truyin dpng.
* SCfc can thanh phan cQa nhanh co tai
Fy, =te+6+g,).i.'».coS;8+(«+&).i.siiiA*G (8)
* Cac (yng suit cua day bang:
S.=S, + F,_,.kG (7)
S-,=\.05.S,.kG (8) S,=S-+F^_,.kG (9) S,=S,.e"\kG (10) Trong do'
kdi - He s6 tinh d i n dy try lyc ma sat, thydng chpnkdi = 1.2-1,25;
e - Ca s6 logarit ty nhien e = 2,71, 10, - He s6 ma sat cua day bang d tang, a - Goe 6m cua day bang vdi tang truyin dpng, do
D I xac dinh STTDN bang tai trong dilu kien cy t h i neu d bang 1 lly kdt = 1,2; |j. = 0,3; a = 210°, tac6:e"« = 3
Giai he phyang trinh
[S, = 3S,
' Xac dinh ii/c keo cua bang chuyen:
(12) ,lcG
1-0,05
* Cong suit yeu ciu cua ddng co bang chuySn:
P ^ ^ , , i v (^3' 102
Trong do:
v - Toe do day bang m/s, Fo- Lyc keo cua bang chuyen, kG, ' Suaf tieu thy di0n nang cua bang chuyen:
A, a,r';,,-^,„
•.kWhIl (14)
Trong do:
P- Cong suit y^u cau trung binh thyc te cua bang chuyen, kW,
Qbi - Nang suit thyc te cua bang chuyen, t/h;
r|ac- Hipu suat dong ca, Tim- Hieu suit mang dien;
2.2. Ket qua mo phong theo dieu kien thirc te
Td mo hinh xay dyng k i t hgp vdi cac so lieu tren thyc t l , ta tiln hanh mo phong doi vdi bang
Bing 1. Cic thdng so ciia bang tai md phong TT
1 2 3 4 5 6 7 8 9 10
Thong so Cong suat dong c a NSng suatdinii mi>c Chi^u rong bang Chjgu dai bang tai Too do bang
Kiioi lirong 3 con lan nhanti co tai Kiioang cacti giOa cac con lan ntianh co tai
Khoi lifong 1 con lan nlianti khong tai
Khoang each giOa cSc con l§n nhanh khong tai
Goc d3t bang
Gii tri 2x55kW i50t;h
1m 250m 2,04m/s
46kg 0,9m 42kg
2,7m 0»
a Dd thi sin IwQng b. Suit tieu thu di$n ning Hinh 4. Ket qua md phdng STTDN cOa bang khi ning suat bang thay doi
KHCNM s o 7/2012* CO DifiN - TU DONG HOA
06 thi STTDN bing dii 200m ft DS thi STTBN bSng dii 100m Hmh 5, Ket qua mo phong STTDN cua bing cd dd dii khic nhau
a STTDN khi gdc ddc bing li S°
Hinh 6. Do thi STTDN khi tai CO cac thong s6 trong bang 1.
a) Ket qua mo phong su' bien thien suat tieu thu khi nang suit bang thay doi theo thyc te, ehieu dai bang 250m va goc doe dat bang khong doi (hinh 4).
STTDN iuon luon ty le nghieh vol san lu'p'ng, Trong mot ea san xuat san iypng vao dau ea, cuoi ca va tho'i gian nghi rat thclp. Do bang iuon phai hoat dpng nen vao lue san iupng thap, STTDN tren met dffn v| san pham la rat cao.
Suat tieu thu dien nang vao glo nghi cao nhat ien den 5,76 kWh/tiin
b) Ket qua mo phong suat tieu thu khi san lifpng bang chuygn thay doi theo thyc te, chl^u dai bang thay doi tCf 250m xuong con 100m va goc d6c dat bang khong d6i (hinh 5).
STTDN giam ty Ip vol chieu dai bang giam, khi bang chuyen dai 200m STTDN la 4,53 kWh/tan, khi bang chuyen dai 100m STTDN la 2,25 kWh/t^n.
c) Ket qua mo phong STTDN khi san iypng bang ehuyen thay d6i theo thyc te, ehl^u dai bang va goc doe d j t bang thay d6i (hinh 6),
STTON tang ty ip khi goo d6c l i p bang tSng
b. STTBN khi gdc ddc bSng li 20°
gdc ddc bang thay ddi
t y 5° len 20° Khi bang chuyen eo goe doc 5°, STTBN nho nhat la 0,106 kWh/tan, khi goe lip bang thay doi len 20°, STTDN nho nhat tang ien 0,38 kWh/tan
3, Kk luan
- Van hanh thiet bl vai nang suat Ion nhat de CO STTON ia nho nhat.
- Chi4u dai tuy^n van tai bang ehuyen cang ngan STTON cang nho.
- Goc dat bang cang doe thi dipn nang tieu thu tren mpt do-n vi san phlm cang Ion.
- Viec tinh lean tryac STTDN se quyet dinh dype vipc iya chpn hp thpng bang tai, do do can ap dung phyang phap mo phong de h6 trp cong tac thi^t ke dyp-c t6t han./.
Tai lieu tham khao:
1. Pham Dire Dp. "Huvng dan xac dinh suit tieu thu dien nang cho cic mo than to thien, ham Id, xi nghiep tuyen than Viet Nam". Vien Khoa hoc Cdng nghe Mo -1998.
2. Vu The Nam. "Nghien ciru xac dinh suat tieu thij dien nang cho do khiu san xuat cua md than him Id vung Quing Ninh". Vien Khoa hoc Cdng nghe Md - Vinacomin 2011.
KHCNM S 6 7/2012' CO BI$N - TVTDONG H 6 A
