Xây dựng phần mềm thiết kế máy tầng sôi liên tục ứng dụng sấy muối tinh

NGHIEN cuu - TRAO DOI

X^y dung phan nndm thiet k^ may t^ng

sOi lign tuc Ung dung sdy mudi tinh

(*) BUI TRUNG THANH

NGUYEN PHAM DlTC QUYNH

1. Gioi thieu

Cong nghe saj' tang sdi duoc xem la mot trong so cac cdng nghe hien dai dang dugc khuyen khich nghien

cim img dung say cac loai vat lieu rdi trong nganh che bien thuc pham, dugc lieu vl hda chat d Viet Nam [7].

Nhirng nam gan day, cic phuong tien truyen thong da cong bd nhieu cong trinh irng dung nguyen ly say

tang soi de thiet ke say nhieu loai san pham dat ket qua khich le, trong dd cd lanh -vuc say mudi tinh tang sdi

lien tuc thay the cho cong nghe say bang may say thung quay hoac say tren may say rung tang soi [7].

Thuc te cho thay, de thuc hien thiet ke hoin chinh mgt he thdng say, ngudi thiet ke phai giai quyet mot khoi

lugng Idn cong viec de giai bai toan say tang sdi. Toan bg cac noi dung cua bai toan thiet ke nay phai giai tren

may tinh bam, trong do, cd nhieu phep tinh phai sir dung phuong phap tinh lap, tinh di, tinh lai nen khd tranh

khdi cic sai sdt dan den san pham thiet ke sai nhieu ldi, ml ngudi thiet ke kho, tham chi 11 khdng the nhan ra

dugc cho den khi may say dugc che tao xong mdi hay biet. Ket qua tiep theo la phai tien hanh hieu chinh lai

cic thong so, hieu chinh kich thude che tao, tham chi phai che tao lai...

Cic sai sdt trong tinh toan va trong thiet ke da gdp phan lam tang chi phi che tao, keo dii thdi gian hieu

chuan thiet bi, gay trd ngai cho cdng tac phit trien cdng nghe say tang soi.

Xuat phat tir cic ly do thuc te tren, yeu can can phai cd mgt phan mem de hd trg viec tinh toin thiet ke may

say tang soi. Phan mem dugc xay dung phii bao dam dugc cac yeu can ciia cong nghe say tang sdi, trg giup dac

luc cho ngudi sir dung thuc hien tinh toan thiet ke may say tang soi nhanh, sd lieu chinh xac hon, day nhanh tien do

tinh toan thiet ke. Tir y nghia vl muc dich dd, chung tdi gidi thieu tdi ban dgc "Phan mem sir dung thiet ke may

say tang soi lien tuc". Cic phan tinh toan cua phan mpm gdm: tinh toin qui trinh say ly thuyet, tinh toan qua trinh

say thuc, xac dinh khong gian say, tinh toin thiet bi phu (Ghi phan phoi khi. Cyclone, budng dot cap nhiet gian

tiep, calorifer khi - khdi. Trong khuon khd bai bao, chimg tdi xin khdng trinh bay phan tinh toin thiet hi phu.

2. Dir lieu va phuong phap

2.1. Cac van de chung

De cd the xay dung dugc mgt phan mem thiet ke ml}', van de trudc tien la ngudi thiet ke phii nam virng

ciing nhu phai thuc hien dugc cac noi dung co ban ciia cong tac thiet ke mly^ cu the nhu sau:

- Nam •virng dugc cac van de ly thuyet co bin cua cdng nghe say tang sdi, su khac biet co ban ciia nguyen

ly say tang sdi so vdi cac nguyen ly say tinh va say khi dong.

- Biet thuc hien tuan tu cac budc de giai bai toin say ly thuyet, bai toin say thuc.

De thuc hien tinh toan thiet ke mo hinh may, ngudi thiet ke phai thuc hien hai ndi dung co ban 11: tinh toan

qua trinh say thdng thudng vl tinh toan xlc dinh cac thong sd van tdc tac nhan say de tao ra che do say ldp hat

sdi on dinh trong khong gian say.

Cu the: De thuc hien dugc hai noi dung tinh toan ndi tren, phai tien hanh thuc hien cac budc nhu sau:

-Xac dinh cac tinh chat vat ly ciia vat lieu am c ^ say (do am vat lieu dau vio, dau ra, dang lien ket am,

nhiet dung rieng, do dan nhiet, kich thude hat vat lieu. [5] [6]

(*) Khoa Cong nghe Nhiet lanh - Dai hoc Cong nghiep TP. HCM

TAP CHica KHi VIET NAM <• So 07-Thang 7 nam 2010