填料塔的等板高度计算
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
Column Tag No.:C-4101 (MAX)Job No.:4506A Client :JOL
Project :SR - Plant -4, 5
Input Data Packing type =Pall metal rings Packing size
=25mm
Gas / Vapour Properties Gas / Vapour flow rate, V =3843kg/h = 1.0675kg/s
= 3.9352kg/m 3
Liquid Properties
Liquid flow rate, L =2317kg/h =0.6436kg/s =769.87kg/m 3
Conversion :Liquid Viscosity, µL =0.0002218Ns/m 20.2218C p =
Ns/m 2
Packing factor, F p
=
160m -1
Calculation
Liq.-Vap. Flow factor, F LV
==Design for an initial pressure drop of 20mm H 2O /m packing From K 4 v/s F LV ,K 4
=0.76K 4 at flooding =
4.50
Trial % flooding
==Gas mass flow rate, V m
==
2.2198kg/m 2.s Trial column c/s area =V / V m
(Trial A s )
=
0.4809m 2Trial column dia., D =
0.7825m
D = (4/pi) x Trial A s COLUMN DIAMETER / HYDRAULIC CHECK
0.00022180(1/2)
Round off 'D' to nearest standard size
Therefore, D=0.600m
Column C/S area, A s=2A s =(pi/4) x D2
% flooding=% flooding = Trial % flooding x (Trial A s / A s) Conclusion
Generally packed towers are designed for 50% -- 85% flooding.
If flooding is to be reduced,
(i) Select larger packing size and repeat the above steps.
OR
(ii) Increase the column diameter and repeat the above steps.
Input Data 0.017 N/m =dyne/cm Liquid-phase Surface Tension, =17dyne/cm Liquid Viscosity =0.2218cP n
=
1.13080
Calculation ln HETP =HETP
=
1.323415ft =
0.403377m
For separations, less than 15 theoritical stages, a 20% design safety factor can be applied.Considering 20% safety factor, HETP =0.484052m
For separations, requiring 15 to 25 theoritical stages, a 15% design safety factor can be applied.Considering 15% safety factor, HETP =0.463883m
HETP PREDICTION
Norton's Correlation Applicable Norton's Correlation Applicable
17