振动往复螺旋强化传热性能及结晶垢微观形貌分析研究

doi:10.11949/0438-1157.20241005

化工学报 ›› 2025, Vol. 76 ›› Issue (4): 1559-1568.DOI: 10.11949/0438-1157.20241005

振动往复螺旋强化传热性能及结晶垢微观形貌分析研究

彭德其¹(), 刘奎霖¹, 武洋¹, 俞天兰², 谭卓伟¹(), 吴淑英¹, 陈莹¹, 唐明成³, 彭建国³

^1.湘潭大学机械工程学院，湖南湘潭 411105
^2.湖南工业大学机械工程学院，湖南株洲 412007
^3.株洲宏大高分子材料有限公司，湖南株洲 412007

收稿日期:2024-09-05 修回日期:2024-11-12 出版日期:2025-04-25 发布日期:2025-05-12
通讯作者: 谭卓伟
作者简介:彭德其（1972—），男，博士，教授，pengshuaike@163.com
基金资助:
湖南省自然科学基金项目(2024JJ7546);湘潭大学博士科研启动项目(21QDZ70)

Enhanced heat transfer performance of vibrating reciprocating helix and micro-morphological analysis of crystallization scale

Deqi PENG¹(), Kuilin LIU¹, Yang WU¹, Tianlan YU², Zhuowei TAN¹(), Shuying WU¹, Ying CHEN¹, Mingcheng TANG³, Jianguo PENG³

^1.College of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, Hunan, China
^2.College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan, China
^3.Zhuzhou Hongda Polymer Material Co. , Ltd. , Zhuzhou 412007, Hunan, China

Received:2024-09-05 Revised:2024-11-12 Online:2025-04-25 Published:2025-05-12
Contact: Zhuowei TAN

摘要/Abstract

摘要：

管内插往复螺旋具有较好的强化传热及阻垢性能，通过实验系统研究了三种螺旋节距对总传热系数、污垢热阻、污垢层厚度的影响，并结合复杂流场条件下结晶垢的微观表征，对内插往复螺旋阻垢除垢原因进行深入分析。结果表明：在实验条件范围内，随管内溶液流速增大，当往复位移为一个节距时总传热系数稳定值较未结垢时仅降低3%，管内污垢热阻稳定值最大降幅为84%，污垢平均厚度小于0.1 mm，污垢微观形貌出现六方晶体及小颗粒致密晶体块，垢层已不能完整覆盖传热面，此时往复螺旋具有连续在线阻垢性能，螺旋线对污垢层剪切力大于其所能承受的最大剪切力是阻垢性能较好的根本原因。

关键词: 螺旋节距, 结垢, 传热, 显微结构, 阻垢性能

Abstract:

The reciprocating spiral inserted in the tube has good heat transfer enhancement and scale inhibition performance. The effects of three spiral pitches on the total heat transfer coefficient, scale thermal resistance and scale layer thickness were studied through an experimental system. Combined with the microscopic characterization of crystallized scale under complex flow field conditions, the reasons for the scale inhibition and removal of the inserted reciprocating spiral were deeply analyzed. The results show that: within the experimental conditions, with the increase of the solution flow rate in the tube, when the reciprocating displacement is one pitch, the total heat transfer coefficient stability value is only 3% lower than that of the non-fouling, the maximum reduction of the stability value of the fouling thermal resistance of the tube is 84%, and the average thickness of the fouling is less than 0.1 mm, and the fouling microscopic appearance appears as hexagonal crystals and small dense crystals, and the fouling layer can't completely cover the heat transfer surface. At this time, the reciprocating spiral has continuous on-line scale inhibition performance, and the shear force of the spiral on the dirt layer is greater than the maximum shear force it can withstand, which is the fundamental reason for the better scale inhibition performance.

Key words: helical pitch, fouling, heat transfer, microstructure, scale inhibition properties

中图分类号:

TK 124

彭德其, 刘奎霖, 武洋, 俞天兰, 谭卓伟, 吴淑英, 陈莹, 唐明成, 彭建国. 振动往复螺旋强化传热性能及结晶垢微观形貌分析研究[J]. 化工学报, 2025, 76(4): 1559-1568.

Deqi PENG, Kuilin LIU, Yang WU, Tianlan YU, Zhuowei TAN, Shuying WU, Ying CHEN, Mingcheng TANG, Jianguo PENG. Enhanced heat transfer performance of vibrating reciprocating helix and micro-morphological analysis of crystallization scale[J]. CIESC Journal, 2025, 76(4): 1559-1568.

图/表 14

图1 实验系统1—恒温水箱;2,4,5,10—阀门;3,9—离心泵;6—电磁阀;7,11—流量计;8—冷冻水箱

Fig.1 Experimental system

图2 螺旋结构示意图

Fig.2 Schematic diagram of spiral structure

表1 螺旋往复位移测定结果

Table 1 Measurement results of spiral repositioning

流速/(m/s)	p/mm	x/mm	t/s
0.2	10	＜1	—
	20	0.8	—
	30	5.0	3.0
0.5	10	3.0	1.7
	20	5.0	2.3
	30	13.0	4.0
0.9	10	7.0	3.7
	20	13.0	4.0
	30	28.0	6.2
1.1	10	9.3	4.2
	20	22.0	5.8
	30	36.0	8.0
1.4	10	12.0	4.5
	20	33.0	8.3
	30	51.0	9.3

图3 硫酸钠溶解度曲线

Fig.3 Solubility curve of sodium sulfate

图4 可拆卸结构实物图

Fig.4 Physical drawing of detachable structure

图5 污垢层观察位置示意图

Fig.5 Observation position diagram of scale layer

图6 污垢样本照片

Fig.6 Scale sample photo

表2 相对误差

Table 2 Relative error

误差来源	误差值
温度记录仪	±0.11%
压力表	±0.28%
热电偶	±1.10%
流量计	±1%

图7 不同流速、不同螺旋节距总传热系数曲线

Fig.7 Curves of total heat transfer coefficient for different flow rates with different helical pitches

图8 不同流速、不同螺旋节距污垢热阻曲线

Fig.8 Fouling thermal resistance curves for different helical pitches at different flow rates

图9 内插往复螺旋污垢平均厚度曲线

Fig.9 Interpolated reciprocating spiral fouling average thickness curve

图10 不同往复位移螺旋污垢形貌照片

Fig.10 Fouling profile of each spiral with different reciprocating displacements

图11 螺旋截面示意图

Fig.11 Schematic diagram of spiral coil cross-section

图12 流速与螺旋剪切力对比

Fig.12 Comparison of flow velocity and spiral shear force

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振动往复螺旋强化传热性能及结晶垢微观形貌分析研究

Enhanced heat transfer performance of vibrating reciprocating helix and micro-morphological analysis of crystallization scale

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