Mô hình lý thuyết sử dụng vỏ trấu trong lò đốt tầng sôi cho sản xuất nhiệt và điện ở việt nam

KHOA HOC - CONG NGHE

MO HlNH LY THUYET SIT DUNG VO TRAU TRONG LO DOT TANG SOI

CHO SAN XUAT NHIET VA DIEN 0 VIET NAM

Nguyen Dinh Titng'

TOM TAT

Bdi bdo ndy dua ra mdl ldng quan ngdn ggn cua md hinh vd ky thudi cua nhd mdy nhiel dien dugc dung vd

trdu trong Id dot ldng sdi (FBC) de Igo ra nhiel vd di?n. Nd md id ca sd ly thuyet md hinh cho nhirng ihdnh phdn

nhd mdy nhiet dien. Nhu mgt vi du, md hinh ly thuyet nhd mdy nhiel dien ddt sinh khdi cdng sudt 2 Megawal dien

da dugc xdy dung vd khdo sdt lu ddng vdi str irg giup cua md hinh EXCEL dugc hd trg bdi Visual Basic. Vdi gid

thiet ban ddu quy dinh nhiel do dot trong FBC Tfn = 800 - 850° C (vdi vd trdu). Kel qud tinh lodn cho thdy rdng:

lugng nguyen li?u cdn cung cdp m Vut/ ~ 0,75 kg/s, tuong ung vdi ndng lugng sa cdp cita nguyen lieu ~ 9688 kW,

ndng dg oxy trong khdi thdi Oz.dr ~ H Vol. %, nhiet do cita khdi Ihdi hdi luu dirac giir khdng thay doi Tuc ^ 170°

C = const, ty le cua khdi thdi hdi liru RC ^ 0,9, hieu sudt nhiel cue dgi cua nhd mdy nhiet dien Tjfh,si ~ 33,6%, hieu

sudt dien cue dgi rjei ~ 18,5%

THEORY MODELING UTILIZED RICE HUSKS IN THE FLUIDIZED BED COMBUSTOR

FOR PRODUCTION OF HEAT AND ELECTRICITY IN VIETNAM

Nguyen Dinh Tung'

SUMMARY

This paper gives a brief review ofthe modeling and techniques of steam power plant utilized rice husks in the

fluidized bed combuslor (FBC) for production of heal and electricity, ll describes basis theory model for power

plant components. As an example, a theory model for a 2 MWd biomass fired power plant has been built and

automatically investigated by the help ofthe EXCEL model supported by Visual Basic. With (he assumed initial

condition temperature in FBC TFB = 800 - 850° C (for rice husks). The calculation results showed that; ihe fuel

mass need to supply mVue/ ~ 0.75 kg/s, corresponding to primary energy of fuel 9688 kW, the oxygen

concentration in exhaust gas 02,dr ~ H Vol. %, the temperature of recirculation exhaust was kept at TRZ = 170° C

= const, Ihe ratio ofthe recirculation exhaust RC ~ 0.9. the maximal of thermal efficiency ofthe steam power

plant 7},h.si ~ 33.6%, the maximal of electrical efficiency r]ei ~ 18.5%.

I. DAT VAN BE

Viet Nam la mot trong s6 nuac dang phat TW vao nam 2010, va 160-200 TW nam 2020

tri8n vai luong dien nang tieu thu a mirc thap, (EVN, 2003. Ng-LTmong and Tran O.Cu. 2004).

uac tinh khoang 210 kg dau quy d6i/ngirai/nam. Da dap ijng dugc nhu chu nang luang ngay

Trong thai ky tiJ 1995-2000, tieu thu nang lugng cang lan nay, thi c5n thiSt phai dSu tu xay dung

dien tang rSt nhanh, trung binh khoang 15%/nam, nhieu nha may phat dien sii dung tu nhieu nguon

nhung nam sau len tai gin 17%. Ty le tang cao nguyen lieu khac nhau. Cac nha may dien. su

nhat la a nganh cong nghiep khoang 19,5%, khu dung cac nguon nguyen lieu truygn th6ng (than,

vuc dich vu 18,3%, ITnh vuc gia dinh khoang dSu, khi, thuy dien...) ngay cang can kiet.

14,2%/nam (Ei'N. 2003: Ng LTruong and Tran Q Cu. Chinh Vl vay, viec SU dung cac ngufin nang

2004). Theo (Ng. Le Truong and Tran Q Cu. 2004). nam lugng sinh kh6i tdi tao de tao ra nang lugng dien

2002 t6ng cong sudt dien dugc xay dung vao la viec lam rSt cSn thiet vao thai diem hien nay cf

khoang 8.860 MW, trong do 51% la tir thuy dien, Viet Nam. No hoan toan co the thay th£ dugc

17% tCr nhiet dien, 27% tir Gas turbine va tCr dong phan nao cho ngu6n nguyen lieu truygn th6ng ya

ca Diesel, va tCr cac ngudn doc lap khac la 5%. cac nguon nhien lieu khac. Ngoai ra con gop phan

Theo cac nha quan ly vg chuyen mon thi yeu chi dang ke vao muc tieu chong thay doi khi hau,

cho su phat trien nang lugng dien khoang 89-93 biSn chat thai (phu pham) cua nganh Nong, Lam

;—\—; nghiep thanh nang lugng nhiet dien.

' Vi?n nghien curu thiSt k£ chS tao may nong nghiep-RIAM.

TAP CHi CONG NGHIEP NONG THON - SO 8 - 2013 27

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