窑炉设计 课程设计 窑炉 CAD 景德镇陶瓷学院

b. 窑墙 窑 耐火层 墙 隔热层 莫来石轻质高铝砖 硅酸盐耐火纤维束 1600℃ 1350 0.310+0.176×10t 0.1～0.3 -30.23 190 t1?725 ℃ ta?40 ℃

设t2?485 ℃ ，t3?73 ℃

?1?0.31?0.176?10?3t1?t2-3

=0.31+0.176×10（725+485）/2=0.416 W/m·℃ 2??273?t3?4?273?ta?4?4.54???????1100100???????? 4a?2.56(t3?ta)?t3?ta??273?73?4?273?40?4?4.54???????1100100???????? 4 =2.56(73?40)?73?40 =12.65 W/m·℃

?1=0.23m

?2＝0.2 W∕(m?℃) ?2=0.19m

热流密度：q??1?21???1?2at1?ta?725?40=433（W/㎡）

0.230.191??0.4160.212.65校核t2、t3

t2?t1??10.23?q?725??433?486 ℃ ?10.416??486?485?100%?0.62%<5% 允许 485??1?2??0.230.19??t3?t1????q?725?????433?74 ℃ ????0.4160.2??2??1??74?73?100%?1.4%<5% 允许 730.68?1.42窑墙散热面积:A墙??2.21?16?37.13 m2

2则Q墙＝2qA墙＝2×433×37.13×3.6＝115806 (kJ/h)

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c. 窑底

耐火层 窑 底 膨胀层 硅酸盐耐火纤维束 1350 0.1～0.3 隔热层 莫来石轻质高铝砖 硅藻土砖 1600℃ 900 0.310+0.176×10t 0.063+0.14×10?3-3230 130 t t1?725 ℃ ta?40 ℃

设t2?470 ℃ ，t3?74 ℃，

?1?0.31?0.176?10?3t1?t2-3

=0.31+0.176×10（725+470）/2=0.415 W/m·℃ 2??273?t3?4?273?ta?4?4.54???????1100100????????

a?2.56(t3?ta)4?t3?ta??273?74?4?273?40?4?4.54???????1100100????????

=2.56(74?40)4?74?40 =12.73 W/m·℃

?1=0.23m

?2?0.063?0.14?10?3?2=0.13m

热流密度：q?t1?t2-3

=0.063+0.14×10（725+470）/2=0.147 W/m·℃ 2?1?21???1?2at1?ta?725?40=451（W/㎡）

0.230.131??0.4150.14712.73校核t2、t3

t2?t1??10.23?q?725??451?475 ℃ ?10.415??475?470?100%?1.1%<5% 允许 470??1?2?0.13??0.23?t3?t1????q?725?????451?75 ℃ ????0.4150.147??2??1??75?74?100%?1.35%<5% 允许 74窑底散热面积:A底＝111.03 m

则Q底＝qA底＝451×111.03×3.6＝180244 (kJ/h)

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ⅱ第22～35节窑体散热计算如下:

取窑外壁温度80℃,窑内壁平均温度为1065℃ d. 窑顶 窑 耐火层 顶 隔热层 莫来石轻质高铝砖 硅酸盐耐火纤维束 1600℃ 1150 0.310+0.176×10t 0.1～0.3 -30.23 150 t1?1065 ℃ ta?80 ℃

设t2?680 ℃ ，t3?124 ℃，

?1?0.31?0.176?10?3t1?t2-3

=0.31+0.176×10（1065+680）/2=0.464 W/m·℃ 2??273?t3?4?273?ta?4?4.54???????1100100???????? a?2.56(t3?ta)4?t3?ta??273?124?4?273?80?4?4.54???????1100100????????

=2.56(124?80)4?124?80 =16.2 W/m·℃

?1=0.23m

?2=0.2 W/m·℃ ?2=0.15m

热流密度：q??1?21???1?2at1?ta?1065?80=753（W/㎡）

0.230.151??0.4640.1216.2校核t2、t3

t2?t1??10.23?q?1065??753?691 ℃ ?10.464??691?680?100%?1.62%<5% 允许 680??1?2??0.230.15??t3?t1????q?1065?????753?126 ℃ ?????0.4640.2?2??1??126?124?100%?1.6%<5% 允许

124窑顶散热面积:A顶＝[（2.73+3.43）/2]×2.21×14＝95.3m 则Q顶＝qA顶＝753×95.3×3.6＝258383 (kJ/h)

2 １８

e. 窑墙 窑 耐火层 墙 隔热层 莫来石轻质高铝砖 混合纤维 1600℃ 1350 0.310+0.176×10t 0.12 -30.23 120 t1?1065 ℃ ta?80 ℃

设t2?580 ℃ ，t3?133 ℃，

?1?0.31?0.176?10?3t1?t2-3

=0.31+0.176×10（1065+580）/2=0.455 W/m·℃ 2??273?t3?4?273?ta?4?4.54???????1100100???????? 4a?2.56(t3?ta)?t3?ta??273?133?4?273?80?4?4.54???????1100100???????? 4 =2.56(133?80)?133?80 =16.88 W/m·℃

?1=0.23m

?2＝0.25 W∕(m?℃) ?2=0.12m

热流密度：q??1?21???1?2at1?ta?1065?80=943（W/㎡）

0.230.121??0.4550.2516.88校核t2、t3

t2?t1??10.23?q?1065??943?588 ℃ ?10.455??588?580?100%?1.38%<5% 允许 580??1?2??0.230.12??t3?t1????q?1065?????943?136 ℃ ????0.4550.25??2??1??136?133?100%?2.26%<5% 允许 133窑墙散热面积:A墙＝[（0.82+1.42）/2]×2.21×14＝34.65m 则Q墙＝2qA墙＝2×943×34.65×3.6＝235156(kJ/h)

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