活性炭吸附床計算,,,,,,,

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序號,名稱符號,,單位,公式,算值,備注,

,項目,符號意義,,,,,

1,VOC氣體原始數據,VOC處理風量Q,m3/h,,30000,,1、廢氣成分：乙酸乙酯、異丙醇、醋酸正丙酯、丙醇等

2,,VOC氣體的濃度C0,mg/m3,,500,,

3,,VOC氣體的溫度T,℃,,40,,

4,,VOC氣體的壓力P,Pa,,103125,,

5,,VOC氣體的密度ρ0,kg/m3,,1.127265,,

6,,VOC氣體的黏度μ,Pa.S,,1.91616E-05,,

7,,VOC氣體的比熱容Cp,kJ/(kg.C),,1.002,,

8,活性炭數據,蜂窩狀活性炭堆積密度ρs,kg/m3,,500,,

9,,蜂窩狀活性炭靜態活性XT,%,kg吸附質/kg吸附劑（廠家提供）,0.35,,1.一般空塔流速0.8~1.2m/s時，動活性XT1=(0.75~0.8)XT，流速越快，動活性越小，公司取8%~10%

10,,蜂窩狀活性炭動態活性XT1,%,kg吸附質/kg吸附劑（實驗獲得）,0.1,取值,

11,,蜂窩狀活性炭孔隙率ε,,,0.5,,

12,,蜂窩狀活性炭比表面積a,m2/g,,700,,

13,,蜂窩狀活性炭使用溫度TS,℃,≤,400,,

14,,蜂窩狀活性炭抗壓強度,Mpa,≤,0.8,,

15,,蜂窩狀活性炭外形規格,mm,,100x100x100,,

16,固定床吸附器數據及計算,吸附器吸附效率η,%,,0.93,,標準上規定：固定床吸附劑顆粒型活性炭0.2-0.6纖維狀吸附劑（活性炭纖維氈）0.1-0.15蜂窩狀吸附劑0.7-1.2

17,,吸附器的空塔截面流速u,m/s,（Q/3600）/A,1.780626781,,

18,,吸附器的截面有效面積A,m2,L*B,4.68,,

19,,活性炭層有效高度Z,m,,0.5,0.5m~0.9m,層高中間需要留一定空間，使熱量均勻分散，局部碳層過熱燒炭

20,,活性炭層的容積Vs,m3,A*Z（或L*B*Z）,2.34,,

21,,吸附器的截面有效長度L,m,取值,2.6,,

22,,吸附器的截面有效寬度B,m,取值,1.8,,

23,吸附時間計算,活性炭作用時間t,h,(Vs*ρs*XT1)/(C/1000000*Q*η),8.387096774,,

24,,在吸附作用時間內的吸附量X,kg,C0*Q/1000000*η*t,117,,被吸附物沸點升高，吸附量增加（規律）

25,,吸附波的移動速度Uc,m/s,(u*C0/1000000)/(ρs*XT1),1.78063E-05,,

26,,有效高度下的活性炭作用時間t',h,Z/Uc/3600,7.8,t'接近t,

27,經驗公式壓降計算,活性炭層有效高度Z,m,,0.5,,

28,,活性炭床壓降△P,Pa,經驗公式：945.1*u1.055×Z,868.5647061,,

29,當量直徑壓降計算,活性炭細管內的流速u1,m/s,u/ε,3.561253561,,

30,,細管的當量直徑de,m,(4*ε）/[a*(1-ε)],0.005714286,,

31,,活性炭平均直徑dp,m,6/a,0.008571429,,

32,,A,,(1-ε)2/ε3,2,,

33,,B,,μ*u/dp2,0.464405488,,

34,,C,,(1-ε)/ε2,2,,

35,,D,,ρ0*u2/dp,416.9832542,,

36,,雷諾數Re,,dp*ρ0*u/μ,897.8861464,,

37,,當Re/(1-ε)≤2500時