Dehumidification performance experiment of hydrophilic non-woven PVC composite structured packing

doi:10.11949/j.issn.0438-1157.20181029

Abstract

Abstract:

The hydrophilic non-woven PVC composite structured packing is used as the core of the solution dehumidification tower, and the dehumidification performance test of the hydrophilic non-woven PVC composite structured packing is carried out. The change of dehumidification rate, dehumidification efficiency, mass transfer coefficient and heat transfer coefficient of hydrophilic non-woven PVC composite structured packing under different air flow, liquid flow and liquid temperature were analyzed. Under experimental conditions, the maximum values of the dehumidification rate, dehumidification efficiency, mass transfer coefficient, and heat transfer coefficient are 11.05 g·kg^-1, 86.7%, 12.95 g·(m²·s)^-1, 10.33 W·(m²·℃)^-1, respectively. Compared with the CELdek structured packing and plastic corrugated-hole plate packing, the hydrophile non-woven PVC composite structured packing has the best dehumidifying performance. The experimental data were regressed to obtain a dehumidification efficiency correlation formula of a hydrophilic non-woven PVC composite structured packing.

Key words: wettability, structured packing, solution, mass transfer, heat transfer

摘要：

将亲水无纺布PVC复合规整填料作为溶液除湿塔芯体，开展亲水无纺布PVC复合规整填料除湿性能实验，分析在不同空气流量、溶液流量、溶液温度下，亲水无纺布PVC复合规整填料除湿率、除湿效率、传质系数和传热系数的变化。在实验条件下，除湿率、除湿效率、传质系数、传热系数最大值分别为11.05 g·kg^-1、86.7%、12.95 g·(m²·s)^-1、10.33 W·(m²·℃)^-1；与CELdek规整填料和塑料波纹孔板填料相比，亲水无纺布PVC复合规整填料除湿性能最优。对实验数据回归分析，得到亲水无纺布PVC复合规整填料除湿效率实验关联式。

关键词: 润湿性, 规整填料, 溶液, 传质, 传热

CLC Number:

TU 834.9

Zhijia HUANG, Liang LUO, Rui KE, Feifei ZHUO, Liang ZHONG. Dehumidification performance experiment of hydrophilic non-woven PVC composite structured packing[J]. CIESC Journal, 2019, 70(3): 913-921.

黄志甲, 罗良, 柯瑞, 卓飞飞, 钟亮. 亲水无纺布PVC复合规整填料除湿性能实验[J]. 化工学报, 2019, 70(3): 913-921.

Figures/Tables 12

References 30

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Parameter	Equipment name	Model	Accuracy	Measuring range
air
flow	air volume cover	TSI-8380	± 3%， ± 10 m3·h^-1	40—4000 m3·h^-1
pressure drop	wind pressure meter	ZC1000-1F	± 1 Pa	0—±3000 Pa
temperature and humidity	temperature and humidity loggers	TR-72wf	± 0.3℃，± 5% RH	-10—60℃,10%—95% RH
liquid
temperature	T-type thermocouple	TT-T-24-SLE	± 0.1℃	-200—260℃
flow	rotameter	LZT-25S25D	± 4%	250—2500 L·h^-1
concentration	electronic balance	AUW120D	± 0.01 mg	0.01—42 g

Parameter	Equipment name	Model	Accuracy	Measuring range
air
flow	air volume cover	TSI-8380	± 3%， ± 10 m3·h^-1	40—4000 m3·h^-1
pressure drop	wind pressure meter	ZC1000-1F	± 1 Pa	0—±3000 Pa
temperature and humidity	temperature and humidity loggers	TR-72wf	± 0.3℃，± 5% RH	-10—60℃,10%—95% RH
liquid
temperature	T-type thermocouple	TT-T-24-SLE	± 0.1℃	-200—260℃
flow	rotameter	LZT-25S25D	± 4%	250—2500 L·h^-1
concentration	electronic balance	AUW120D	± 0.01 mg	0.01—42 g

Ref.	Packing type		Air mass flow/(kg·s^-1)	Liquid mass flow/(kg·s^-1)	Liquid temperature/℃	Experimental result
35%LiCl^[26]	plant fiber packing(CELdek)	range	0.055—0.178	0.06—0.085	20.5—29.3
35%LiCl^[26]	plant fiber packing(CELdek)	α	↑	/	↓	3.1—12.3 g·(m²·s)^-1
34%LiCl^[27]	plastic corrugated-hole plate packing	range	0.038—0.113	0.005—0.2	15
34%LiCl^[27]	plastic corrugated-hole plate packing	α	↑	↓	/	2—10 g·(m²·s)^-1
33%LiCl^[28]	paper corrugated structured packing	range	0.171—0.241	0.08—0.24	38.3—39.4
33%LiCl^[28]	paper corrugated structured packing	k	↑	↑	/	3.1—5.3W·(m²·℃)^-1
30%LiCl^[29]	inorganic packing(GLASdek)	range	0.2	0.082—0.198	15.3—20.6
30%LiCl^[29]	inorganic packing(GLASdek)	k	/	↑	↓	2.8—4.3 W·(m²·℃)^-1
43%LiBr^[30]	plant fiber packing(CELdek)	range	0.378—0.521	0.475—0.994	22.2—26.7
43%LiBr^[30]	plant fiber packing(CELdek)	η	↓	↑	↓	0.552—0.639
this paper (42%LiBr)	hydrophilic non-woven PVC composite structure packing	range	0.067—0.2	0.06—0.22	7—23
		η	↓	↑	↓	0.224—0.896
		α	↑	↑	↓	5.39—12.95 g·(m²·s)^-1
		k	↑	↑	↓	5.6—10.3 W·(m²·℃)^-1

Ref.	Packing type		Air mass flow/(kg·s^-1)	Liquid mass flow/(kg·s^-1)	Liquid temperature/℃	Experimental result
35%LiCl^[26]	plant fiber packing(CELdek)	range	0.055—0.178	0.06—0.085	20.5—29.3
35%LiCl^[26]	plant fiber packing(CELdek)	α	↑	/	↓	3.1—12.3 g·(m²·s)^-1
34%LiCl^[27]	plastic corrugated-hole plate packing	range	0.038—0.113	0.005—0.2	15
34%LiCl^[27]	plastic corrugated-hole plate packing	α	↑	↓	/	2—10 g·(m²·s)^-1
33%LiCl^[28]	paper corrugated structured packing	range	0.171—0.241	0.08—0.24	38.3—39.4
33%LiCl^[28]	paper corrugated structured packing	k	↑	↑	/	3.1—5.3W·(m²·℃)^-1
30%LiCl^[29]	inorganic packing(GLASdek)	range	0.2	0.082—0.198	15.3—20.6
30%LiCl^[29]	inorganic packing(GLASdek)	k	/	↑	↓	2.8—4.3 W·(m²·℃)^-1
43%LiBr^[30]	plant fiber packing(CELdek)	range	0.378—0.521	0.475—0.994	22.2—26.7
43%LiBr^[30]	plant fiber packing(CELdek)	η	↓	↑	↓	0.552—0.639
this paper (42%LiBr)	hydrophilic non-woven PVC composite structure packing	range	0.067—0.2	0.06—0.22	7—23
		η	↓	↑	↓	0.224—0.896
		α	↑	↑	↓	5.39—12.95 g·(m²·s)^-1
		k	↑	↑	↓	5.6—10.3 W·(m²·℃)^-1

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