高浓度冰浆管内流动特性及清管能力衰减研究

doi:10.11949/0438-1157.20250532

化工学报 ›› 2025, Vol. 76 ›› Issue (11): 5842-5852.DOI: 10.11949/0438-1157.20250532

• 流体力学与传递现象 • 上一篇

高浓度冰浆管内流动特性及清管能力衰减研究

陈永珍¹^,²(), 宋文吉²(), 陈二雄², 秦坤², 周雨杰³, 杜群², 冯自平¹^,²

^1.中国科学技术大学热科学与能源工程系，安徽合肥 230026
^2.中国科学院广州能源研究所，广东广州 510640
^3.沈阳化工大学机械与动力工程学院，辽宁沈阳 110142

收稿日期:2025-05-13 修回日期:2025-06-30 出版日期:2025-11-25 发布日期:2025-12-19
通讯作者: 宋文吉
作者简介:陈永珍（1985—），女，博士研究生，工程师，chenyz@ms.giec.ac.cn
基金资助:
广东省国际科技合作基地项目(2023A0505090006)

Flow characteristics and pigging performance degradation of high-concentration ice slurry in pipelines

Yongzhen CHEN¹^,²(), Wenji SONG²(), Erxiong CHEN², Kun QIN², Yujie ZHOU³, Qun DU², Ziping FENG¹^,²

^1.Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
^2.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
^3.School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, China

Received:2025-05-13 Revised:2025-06-30 Online:2025-11-25 Published:2025-12-19
Contact: Wenji SONG

摘要/Abstract

摘要：

为了对冰浆清管能力进行定量描述，以实验研究的方式分析过冷水冰浆管内流动及清管能力特性。首先，对体积含冰率范围为22.7%~33.5%的冰浆柱塞流动的管壁切应力进行研究，发现切应力大小主要受含冰率和推动水流速的影响。重点研究冰浆清管能力衰减特性，发现推动水流速越快，冰浆空隙率越高，渗透速率越快。柱塞长度为总管长度的10%，且温度分别为6、9和12℃时，冰浆柱塞前进21.5 m，压降保持率分别为87.02%、81.13%和74.21%，温度提高3℃，压降保持率分别下降了5.89%和6.92%。柱塞长度为20%，温度分别为15、18和21℃时，叠加了推动水流速提高了0.02 m/s对压降的影响，温度提高3℃，压降保持率分别下降了1.75%和3.09%，推动水温度增加引起的压降降低不容忽视。根据冲量定律定义冰浆柱塞清管能力保持率，柱塞长度分别为管长的10%、20%和30%时，冰浆柱塞前进21.5 m，6℃时清管能力保持率分别为67.18%、79.60%和86.67%。且温度每增加1℃，10%和20%冰浆柱塞长度时的清管能力衰减约为1.1%，30%冰浆柱塞长度时的清管能力衰减约为0.9%。

关键词: 冰浆, 流动, 渗透, 冰清管, 性能衰减

Abstract:

In order to quantitatively describe the cleaning ability of ice-pigging, this study analyzes the characteristics of supercooled ice slurry cleaning through experimental research. Firstly, the morphology of supercooled ice slurry particles produced from a 5% NaCl solution was studied, and the interpolation estimation method was used to determine an average ice crystal particle size of 275 μm with a roundness of 0.64. The shear stress of ice slurry plungers with an ice volume fraction of 22.7%—33.5% was investigated, revealing that it is primarily influenced by ice fraction and pushing water flow velocity, with minimal dependence on solution salinity. This study primarily investigates the performance degradation characteristics of ice-pigging. Research on the permeability characteristics of ice slurry plungers revealed that both the pushing water flow rate and porosity significantly influence the permeability rate: the higher the pushing water flow rate and porosity, the faster the permeability rate. When the plunger length accounted for 10% of the total pipe length, at temperatures of 6, 9 and 12℃ respectively,the ice slurry plungers advanced 21.5 m along the pipe section, with pressure drop retention rates of 87.02%, 81.13% and 74.21%, respectively. The pressure drop retention rates decreases by 5.89% and 6.92%, respectively, for each 3℃ temperature increase. When the plunger length was 20% and the temperatures were 15, 18 and 21℃, respectively, the pressure drop retention rates decreased by 1.75% and 3.09%, respectively, due to the effect of a 0.02 m/s increase in the driving water velocity. The pressure drop reduction caused by the increase in driving water temperature cannot be ignored. Based on the impulse law, the retention rate of ice slurry plunger cleaning ability was defined, and its attenuation performance was studied. At plunger lengths of 10%, 20% and 30%, the ice slurry plunger advances 21.5 meters, with cleaning ability retention rates at 6℃ of 67.18%, 79.60% and 86.67%, respectively. For every 1℃ temperature increase, the cleaning ability decreases by approximately 1.1% at 10% and 20% plunger lengths and by about 0.9% at a 30% plunger length.

Key words: ice slurry, flow, permeation, ice-pigging, performance degradation

中图分类号:

TB 64

陈永珍, 宋文吉, 陈二雄, 秦坤, 周雨杰, 杜群, 冯自平. 高浓度冰浆管内流动特性及清管能力衰减研究[J]. 化工学报, 2025, 76(11): 5842-5852.

Yongzhen CHEN, Wenji SONG, Erxiong CHEN, Kun QIN, Yujie ZHOU, Qun DU, Ziping FENG. Flow characteristics and pigging performance degradation of high-concentration ice slurry in pipelines[J]. CIESC Journal, 2025, 76(11): 5842-5852.

图/表 16

图1 冰浆管道流动实验示意图

Fig.1 Schematic diagram of ice slurry flow experimental system

表1 冰浆含冰率系数相对误差

Table 1 Relative error of ice fraction

序号	Φ_v	Φ_m	Φ	相对误差/%
1	31.01	29.23	30.51	4.20
2	41.04	39.01	39.41	1.01
3	45.60	43.51	45.74	4.88

图2 含盐率分别为1.0%、2.0%和4.0%的盐水制备的冰浆冰晶形貌

Fig.2 Ice crystal morphology in ice slurries prepared with 1.0%, 2.0% and 4.0% NaCl solutions respectively

图3 不同初始盐浓度下的冰晶平均粒径(a)及正态分布曲线(b)

Fig.3 Particle size distribution (a) and Gaussian fitting curves (b) of ice slurry at different initial NaCl concentrations

图4 1.5%含盐率下制备的冰浆不同含冰率下的流速和切应力关系

Fig.4 Relationship between liquid flow velocity and shear stress of ice slurry prepared with 1.5% NaCl solutions under different ice fractions

图5 2.2%含盐率下制备的冰浆不同含冰率下的流速和切应力关系

Fig.5 Relationship between liquid flow velocity and shear stress of ice slurry prepared with 2.2% NaCl solutions under different ice fractions

图6 2.9%含盐率下制备的冰浆不同含冰率下的流速和切应力关系

Fig.6 Relationship between liquid flow velocity and shear stress of ice slurry prepared with 2.9% NaCl solutions under different ice fractions

图7 0.3、0.5和0.7 m/s时的含冰率和切应力关系曲线

Fig.7 Relationship between ice fraction and shear stress at flow velocities of 0.3, 0.5 and 0.7 m/s

图8 冰浆柱塞流动渗透界面(a)及测量方式(b)

Fig.8 Ice-pigging permeation interface (a) and measurement method (b)

表2 σ值计算结果

Table 2 Calculation results of σ values

序号	实验条件			实验结果
序号	Φ_v,caf	ε	推动水流速/(m/s)	渗透速率/(mm/s)	修正σ
1	0.72	0.59	0.47	6.09	303.10
2	0.70	0.60	0.21	4.16	791.88
3	0.70	0.60	0.22	4.49	783.90
4	0.68	0.61	0.21	4.31	763.28
5	0.68	0.61	0.40	6.73	367.22
6	0.66	0.62	0.23	5.09	691.76
7	0.66	0.62	0.27	5.30	542.90
8	0.66	0.62	0.34	6.17	411.94
9	0.66	0.62	0.54	7.69	234.69
10	0.65	0.63	0.24	5.26	612.69
11	0.65	0.63	0.53	7.95	244.97
12	0.65	0.63	0.56	8.21	217.74
13	0.64	0.64	0.21	4.89	709.87
14	0.64	0.64	0.22	5.00	668.29
15	0.63	0.64	0.49	7.46	234.24
16	0.62	0.64	0.52	7.90	215.92
17	0.61	0.65	0.54	8.97	222.85
18	0.61	0.65	0.56	9.30	218.25

图9 σ值和渗透速率的关系

Fig.9 Relationship between σ value and percolation rate

图10 冰浆柱塞经过前后测试段压降及流速变化

Fig.10 Pressure drop and liquid flow velocity variation across test sections during ice-pigging flow

表3 不同柱塞长度及温度下的平均压降保持率

Table 3 Average pressure drop retention rates under different ice-pigging lengths and temperatures

温度/℃	柱塞长度10%		柱塞长度20%		柱塞长度30%
温度/℃	ΔP_r/%	Δu/(m/s)	ΔP_r/%	Δu/(m/s)	ΔP_r/%	Δu/(m/s)
6	87.02	-0.0058	90.22	0.0273	101.12	0.0212
9	81.13	0.0062	87.28	0.0286	101.49	0.0217
12	74.21	0.0054	86.83	0.0301	88.08	0.0266
15	77.76	0.0202	83.29	0.0180	88.93	0.0327
18	72.01	0.0402	81.54	0.0196	85.39	0.0271
21	71.00	0.0395	78.45	0.0189	89.07	0.0458
24	—	—	68.47	0.0140	78.51	0.0251

图11 柱塞长度为10%管长时清管能力保持率

Fig.11 Pigging performance maintenance for 10%-length ice plug

图12 柱塞长度为20%管长时清管能力保持率

Fig.12 Pigging performance maintenance for 20%-length ice plug

图13 柱塞长度为30%管长时清管能力保持率

Fig.13 Pigging performance maintenance for 30%-length ice plug

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高浓度冰浆管内流动特性及清管能力衰减研究

Flow characteristics and pigging performance degradation of high-concentration ice slurry in pipelines

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