Characteristics of microbial fouling on Ni-P- (nano) TiO2 composite coating of plate heat exchanger

doi:10.11949/0438-1157.20200175

Abstract

Abstract:

The problem of microbial fouling of heat exchangers is common in the field of energy and chemical industry. The accumulation of fouling will lead to a substantial increase in the flow resistance, fuel consumption and maintenance cost of equipment. In this paper, a nano-composite coating was prepared to reduce the adhesion and deposition of microbial fouling on heat exchange surface. Firstly, the Ni-P- (nano) TiO₂ composite coatings and the controlled Ni-P coatings were prepared on stainless steel 316 plates of a plate heat exchanger by using electroless plating. Secondly, based on the heat exchanger microbial fouling on-line monitoring experimental system, the microbial fouling characteristics of plate heat exchangers coated Ni-P- (nano) TiO₂ composite coating were investigated experimentally. The results showed that the friction coefficient (f) and Nusselt number (Nu) of the two coated plate heat exchangers were a little higher than the uncoated one when it is in cleaning conditions. After the microbial fouling experiment, compared with the uncoated plate heat exchanger, the fouling resistance of Ni-P coated plate heat exchanger was reduced by 8.36%—23.07%, while the other one coated Ni-P- (nano) TiO₂ was reduced by 16.6%—30.96%. Under the same microbial fouling experimental conditions, the heat transfer and fouling characteristics of the two coatings were compared and analyzed further. The friction coefficient (f) of plate heat exchanger coated Ni-P- (nano) TiO₂ coating was reduced by 2.54%—11.82% compared with the coated Ni-P one, while Nu was increased by 8.47%—9.45%, and the fouling resistance was reduced by 10.66%—18.18% correspondingly. The plate heat exchanger coated Ni-P- (nano) TiO₂ composite coating showed an excellent microbial fouling inhibition performance in heat mass transfer process.

Key words: composite nanomaterial coating, microbial fouling, plate heat exchanger, heat transfer and mass transfer, deposition

摘要：

换热器微生物污垢问题普遍存在于能源化工领域，污垢的聚集会导致设备的流动阻力、燃料消耗和维护成本支出大幅度增加。本文采用复合纳米镀层来抑制和减轻换热表面的微生物污垢的附着和沉积。首先采用化学镀的方式，在板式换热器的不锈钢316板上镀覆 Ni-P-TiO₂复合纳米镀层和对照性的Ni-P 镀层。基于板式换热器的微生物污垢在线监测实验系统，研究了镀覆Ni-P-TiO₂复合纳米镀层的板式换热器微生物污垢特性。结果表明，清洁状态下，镀覆两种镀层的板式换热器其摩擦系数（f）和Nusselt数（Nu）相较未镀覆板式换热器均略有增加；微生物污垢实验后，相比较未镀覆的板式换热器，镀覆Ni-P镀层的板式换热器污垢热阻减少了8.36%~23.07%，而镀覆Ni-P-TiO₂复合纳米镀层的板式换热器污垢热阻减少了16.6%~30.96%；在相同微生物污垢实验工况下，镀覆Ni-P-TiO₂复合纳米镀层的板式换热器的摩擦系数（f）相比Ni-P镀层的低2.54%~11.82%，但Nu却明显高于Ni-P镀层达8.47%~9.45%，并且污垢热阻明显小于Ni-P镀层达10.66%~18.18%，镀覆Ni-P-TiO₂复合纳米镀层的板式换热器展现了优异的强化传热性能和抑垢性能。

关键词: 复合纳米镀层, 微生物污垢, 板式换热器, 传热传质, 沉积物

CLC Number:

TK 124

Zuodong LIU, Siqi LI, Weiwei XING, Zhiming XU. Characteristics of microbial fouling on Ni-P- (nano) TiO₂ composite coating of plate heat exchanger[J]. CIESC Journal, 2020, 71(8): 3535-3544.

刘坐东, 李斯琪, 邢维维, 徐志明. 板式换热器Ni-P-TiO₂复合纳米镀层微生物污垢特性[J]. 化工学报, 2020, 71(8): 3535-3544.

Figures/Tables 15

Table 1 Dimension parameters of the test plate heat exchanger

材料

板片尺寸/mm

波纹

形式

波纹深度/mm

当量直径/mm

单流道截面积/

m²

角孔直径/

Fig.1 Surface micromorphology

Table 3 Contact angle and surface energy of each surface

表面	θ^w/(°)	θ^Di/(°)	θ^EG/(°)	γ^LW/(mJ/m²)	γ^-/(mJ/m²)	γ⁺/(mJ/m²)	γ^TOT/(mJ/m²)
不锈钢	95.0±0.6	25.7±0.8	48.6±0.5	44.56	2.29	0.81	47.09
Ni-P镀层	84.3±0.5	28.6±1.8	43.5±2.5	44.83	1.41	0.29	46.11
Ni-P-TiO₂复合纳米镀层	64.3±2.4	38.4±1.2	58.8±0.8	41.15	9.58	0.41	44.29

Table 2 Surface energy of the test liquid

测试液体

γ l

/(mJ/m²)

$γ l L W$ /

(mJ/m²)

$γ l A B$ /

(mJ/m²)

γ l +

/(mJ/m²)

γ l -

/(mJ/m²)

水

二碘甲烷

乙二醇

Table 2 Surface energy of the test liquid

测试液体

γ l

/(mJ/m²)

$γ l L W$ /

(mJ/m²)

$γ l A B$ /

(mJ/m²)

γ l +

/(mJ/m²)

γ l -

/(mJ/m²)

水

二碘甲烷

乙二醇

72.8

21.8

51.0

25.5

50.8

48.0

29.0

19.0

1.92

47.0

Fig.2 Experimental system

Table 4 Uncertainty estimates for measurement and calculation

范宁

摩擦系数f

Table 5 Instrument uncertainty

Pt100热电阻	压差变送器	绕线电阻	A/D转换器	电磁流量计
0.2%	0.1%	0.05%	0.01%	0.5%

Fig.3 Stability verification of experimental system

Fig.4 Relationship between f and Re in different states

Fig.5 Relationship between Nu and Re in different states

Table 6 Correlation between friction factors and Nu on different surfaces

表面	$f = C R e n$		$N u = C R e n P r m μ f / μ w 0.14$
表面	清洁状态	污垢状态	清洁状态	污垢状态
不锈钢	C=28.58,n=-0.57	C=166.49,n=-0.73	C=0.238,n=0.50	C=0.052,n=0.69
Ni-P镀层	C=30.53,n=-0.59	C=190.45,n-0.76	C=0.245,n=0.51	C=0.144,n=0.55
Ni-P-TiO₂复合纳米镀层	C=42.35,n=-0.64	C=267.25,n=-0.83	C=0.161,n=0.59	C=0.205,n=0.52

Table 6 Correlation between friction factors and Nu on different surfaces

表面	$f = C R e n$		$N u = C R e n P r m μ f / μ w 0.14$
表面	清洁状态	污垢状态	清洁状态	污垢状态
不锈钢	C=28.58,n=-0.57	C=166.49,n=-0.73	C=0.238,n=0.50	C=0.052,n=0.69
Ni-P镀层	C=30.53,n=-0.59	C=190.45,n-0.76	C=0.245,n=0.51	C=0.144,n=0.55
Ni-P-TiO₂复合纳米镀层	C=42.35,n=-0.64	C=267.25,n=-0.83	C=0.161,n=0.59	C=0.205,n=0.52

Table 7 Fluctuation range of fouling resistance on different surfaces at different flow rates

表面	热阻波动范围/（m²·K/W）
表面	0.1 m/s	0.2 m/s	0.3 m/s
不锈钢表面	-2.69×10^-5~25.59×10^-5	-1.91×10^-5~19.72×10^-5	-0.80×10^-5~12.49×10^-5
Ni-P镀层	-1.44×10^-5~22.50×10^-5	-0.47×10^-5~16.75×10^-5	-0.31×10^-5~11.17×10^-5
Ni-P-TiO₂复合纳米镀层	-0.57×10^-5~20.10×10^-5	-0.95×10^-5~14.98×10^-5	-1.19×10^-5~9.99×10^-5

Fig.6 Fouling resistance on stainless steel 316 plates, Ni-P coating and Ni-P-TiO2 composite coating at different flow rates

Fig.7 Effect of flow velocity on shear force

Fig.8 Effect of flow rate on asymptotic value of fouling resistance

References 33

1	杨善让, 徐志明, 孙灵芳, 等. 换热设备污垢与对策[M]. 2版. 北京: 科学出版社, 2004: 17.
	Yang S R, Xu Z M, Sun L F, et al. Fouling and Countermeasures of Heat Exchanger[M]. 2nd ed. Beijing: Science Press, 2004: 17.
2	Yang Q, Wilson D I, Chen X, et al. Experimental investigation of interactions between the temperature field and biofouling in a synthetic treated sewage stream[J]. Biofouling, 2013, 29(5): 513-523.
3	Cao S X, Zhang Y H, Zhang J, et al. Experimental study on dynamic simulation for biofouling resistance prediction by least squares support vector machine[J]. Energy Procedia, 2012, 17(Part A): 74-78.
4	王洋, 张晓健, 陈雨乔, 等. 给水管网管壁铁细菌生长特性模拟及控制对策研究[J]. 环境科学, 2009, 30(11): 3293-3299.
	Wang Y, Zhang X J, Chen Y Q, et al. Growth characteristics and control of iron bacteria on cast iron in drinking water distribution systems[J]. Environmental Science, 2009, 30(11): 3293-3299.
5	崔艳雨, 宁丽纳. 飞机油箱用材7075铝合金在积水环境中的微生物腐蚀规律[J]. 材料保护, 2014, 47(12): 29-32.
	Cui Y Y, Ning L N. Microbial corrosion of 7075 aluminum alloy for aircraft fuel tank materials in water environment[J]. Materials Protection, 2014, 47(12): 29-32.
6	叶春松, 郝洪铎, 王天平, 等. 微生物菌剂处理循环冷却水的作用原理及其工业应用试验[J]. 环境工程, 2019, 37(8): 42-46.
	Ye C S, Hao H D, Wang T P, et al. Principle of recirculating cooling water treated with microbial agents and its industrial test[J]. Environmental Engineering, 2019, 37(8): 42-46.
7	常思远, 方宇晴, 史琳, 等. Ca²⁺浓度对再生水源热泵系统中微生物污垢的影响及作用机理[J]. 制冷学报, 2016, 37(6): 55-60.
	Chang S Y, Fang Y Q, Shi L, et al. Effect of Ca²⁺ concentration on microbial fouling in regenerative water source heat pump system and its mechanism[J]. Journal of Refrigeration, 2016, 37(6): 55-60.
8	杨帅. 海水板式换热器微生物污垢特性及传热强化的研究[D]. 青岛: 中国海洋大学, 2014.
	Yang S. Study on microbial fouling characteristics and heat transfer enhancement of seawater plate heat exchangers[D]. Qingdao: Ocean University of China, 2014.
9	马东. 再生水宽流道板式换热器微生物污垢生长规律及其对传热性能影响的研究[D]. 西安: 西安建筑科技大学, 2017.
	Ma D. Study on the growth law of microbial fouling and its influence on heat transfer performance of the wide-flow plate heat exchanger of recycled water[D]. Xi􀆳an: Xi􀆳an University of Architecture and Technology, 2017.
10	王蓉. 微生物污垢仿生换热模型及数值模拟[D]. 哈尔滨: 哈尔滨工业大学, 2018.
	Wang R. Bionic heat transfer model and numerical simulation of microbial fouling[D]. Harbin: Harbin Institute of Technology, 2018.
11	王晶. 换热器表面蛋白质污垢的生长与清洗及抑垢研究[D]. 苏州: 苏州大学, 2018.
	Wang J. Study of protein fouling on heat exchanger surface and anti-fouling[D]. Suzhou: Soochow University, 2018.
12	Chen X, Yang Q R, Wang R H, et al. Experimental study of the growth characteristics of microbial fouling on sewage heat exchanger surface[J]. Applied Thermal Engineering, 2018, 128: 426-433.
13	Chandra K, Mahanti A, Singh A P, et al. Microbiologically influenced corrosion of 70/30 cupronickel tubes of a heat-exchanger[J]. Engineering Failure Analysis, 2019, 105: 1328-1339.
14	Li N, Yang Q, Yao E, et al. Synergism between particulate and microbial fouling on a heat transfer surface using treated sewage water[J]. Applied Thermal Engineering, 2019, 105: 791-802.
15	Zouaghi S, Six T, Nuns N, et al. Influence of stainless steel surface properties on whey protein fouling under industrial processing conditions[J]. Journal of Food Engineering, 2018, 228: 38-49.
16	吕昌旗, 孙玲玲, 王云汉, 等. 换热设备污垢热阻和腐蚀监测技术综述[J]. 现代工业经济和信息化, 2016, 6(6): 73.
	Lyu C Q, Sun L L, Wang Y H, et al. Review of fouling resistance and corrosion monitoring techniques for heat exchange equipment[J]. Modern Industrial Economy and Information Technology, 2016, 6(6): 73.
17	郭静. 金属材料的表面腐蚀与防护措施分析[J]. 科学技术创新, 2018, (21): 171-172.
	Guo J. Analysis of surface corrosion and protective measures of metal materials[J]. Science and Technology Innovation, 2018, (21): 171-172.
18	冯刚. 石油化工行业不锈钢的常见腐蚀分析与涂层防护[J]. 涂层与防护, 2018, 39(8): 4-7.
	Feng G. Corrosion analysis and coating protection for stainless steel in petrochemical industry[J]. Coating and Protection, 2018, 39(8): 4-7.
19	Powell C A. Preventing biofouling with copper-nickel alloys[J]. Mater World, 1994, 2(4): 181-183.
20	程延海, 朱真才, 韩正铜, 等. 镀层换热表面凝结传热实验研究[J]. 中国电机工程学报, 2010, 30(8): 27-31.
	Cheng Y H, Zhu Z C, Han Z T, et al. Experimental study on condensation and heat transfer of coating heat exchange surface[J]. Proceedings of the CSEE, 2010, 30(8): 27-31.
21	Cheng Y H, Zou Y, Cheng L, et al. Effect of the microstructures on the properties of Ni-P deposits on heat transfer surface[J]. Surface and Coatings Technology, 2009, 203(12): 1559-1564.
22	杨倩鹏, 田磊, 常思远, 等. 换热表面镀银抑制微生物污垢综合分析[J]. 工程热物理学报, 2014, (2): 354-357.
	Yang Q P, Tian L, Chang S Y, et al. Comprehensive analysis of inhibition of microbial fouling by silver plating on heat exchange surface[J]. Journal of Engineering Thermophysics, 2014, (2): 354-357.
23	Huang K, Goddard J M. Influence of fluid milk product composition on fouling and cleaning of Ni–PTFE modified stainless steel heat exchanger surfaces[J]. Journal of Food Engineering, 2015(158): 22-29.
24	Zhao Q, Liu C, Su X, et al. Antibacterial characteristics of electroless plating Ni–P–TiO₂ coatings[J]. Applied Surface Science, 2013, 274: 101-104.
25	Jindal S, Anand S, Metzger L, et al. Short communication: a comparison of biofilm development on stainless steel and modified-surface plate heat exchangers during a 17-h milk pasteurization run[J]. Journal of Dairy Science, 2018, 101(4): 2921-2926.
26	Oldani V, Biella S, Bianchi C L, et al. Perfluoropolyethers coatings design for fouling reduction on heat transfer stainless-steel surfaces[J]. Heat Transfer Engineering, 2016, 37: 210-219.
27	Balasubramanian S, Puri V M. Thermal energy savings in pilot-scale plate heat exchanger system during product processing using modified surfaces[J]. Journal of Food Engineering, 2009, 91(4): 608-611.
28	Lukas S, Wolfgang A, Stephan S, et al. Fouling mitigation in food processes by modification of heat transfer surfaces: a review[J]. Food and Bioproducts Processing, 2020, 121: 1-19.
29	罗敏, 司徒振明. 液体界面张力的测定方法——悬滴法[J]. 材料工程, 1989, (2): 23-26.
	Luo M, Situ Z M. Method for measuring liquid interfacial tension— method of hanging-drop[J]. Materials Engineering, 1989, (2): 23-26.
30	Bellon-Fontaine M N, Rault J, Oss V. Microbial adhesion to solvents: a novel method to determine the electron-donor/electron-acceptor or Lewis acid-base properties of microbial cells[J]. Colloids & Surface B, 1996, 7(1/2): 47-53.
31	张海泉. 板式换热器热工与阻力性能测试及计算方法研究[D]. 哈尔滨: 哈尔滨工业大学, 2006.
	Zhang H Q. Testing and calculate method study on thermal performance and flow pressure drop characteristics of a plate heat exchanger[D]. Harbin: Harbin Institute of Technology, 2006.
32	徐志明, 贾玉婷, 王丙林, 等. 板式换热器铁细菌生物污垢特性的实验分析[J]. 化工学报, 2014, 65(8): 3178-3183.
	Xu Z M, Jia Y T, Wang B L, et al. Experimental analysis on bio-fouling of iron bacteria on plate heat exchanger[J].CIESC Journal, 2014, 65(8): 3178-3183.
33	Webb R L. Heat transfer and friction characteristics of internal helical-rib roughness[J]. Journal of Heat Transfer, 2000, 122(1): 134-142.

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Characteristics of microbial fouling on Ni-P- (nano) TiO₂ composite coating of plate heat exchanger

板式换热器Ni-P-TiO₂复合纳米镀层微生物污垢特性

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