Microwave Drying of Sewage Sludge: Process Performance and Energy Consumption

被引:2
|
作者
Wang, Guangyu [1 ]
Zhang, Kai [1 ]
Huang, Bocheng [1 ]
Zhang, Kaihua [1 ]
Chao, Cong [1 ]
机构
[1] North China Elect Power Univ, Beijing Key Lab Emiss Surveillance & Control Therm, Beijing 102206, Peoples R China
基金
中国国家自然科学基金;
关键词
sludge; microwave; drying; kinetics; energy consumption; MOISTURE DISTRIBUTION; MASS-TRANSFER; COAL SLIME; LIGNITE; WATER; KINETICS; SIMULATION; UNIFORMITY; MODEL; HEAT;
D O I
10.3390/pr12030432
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The microwave drying of sewage sludge is characterized by its speed and safety. A novel method for identifying free and bound water is proposed in this study. Experiments were performed to investigate the process performance and energy consumption in a microwave drying unit. The results indicate that the microwave drying process can be described in three stages, i.e., the preheating stage, constant-rate stage, and decreasing-rate stage. The preheating and constant-rate stages mainly remove free water, while the decreasing-rate stage mainly removes bound water. The Linear model effectively describes the kinetic processes in the constant-rate stage, and the modified Page I model is suitable for describing the decreasing-rate stage. The energy conversion process in microwave drying is explored, revealing that heat efficiency and energy consumption are consistent with microwave power changes. The heat efficiency in the constant-rate drying stage ranges from 60.33% to 71.01%, lower than that in the preheating stage but higher than that in the decreasing-rate stage. Energy consumption in the constant-rate stage ranges from 3.84 kJ/g to 8.20 kJ/g, significantly lower than in the other two stages. These results provide fundamental data for the industrial application of microwave drying of sludge and contribute to the advancement of microwave drying technology.
引用
收藏
页数:20
相关论文
共 50 条
  • [21] Drying characteristics of sewage sludge
    Qian, Jiang
    Yoon, Yeong Woo
    Youn, Pil Sang
    Kim, Ji Hye
    Choi, Don Sun
    Choi, Jeong-Hoo
    Choi, Young Chan
    Jung, Bongjin
    KOREAN JOURNAL OF CHEMICAL ENGINEERING, 2011, 28 (07) : 1636 - 1640
  • [22] Drying of industrial sludge using microwave: Heating performance, mass loss, and energy analysis
    Liu, Chaoyue
    Liu, Zhihong
    Zhang, Man
    Zhao, Wenke
    Zhang, Yaning
    Biomass and Bioenergy, 2025, 197
  • [23] Analysis of Sewage Sludge Properties and Drying Process of by Mechanical Vapour Recompression
    Su, Xiao-Wen
    Xu, Xiao-Hong
    Ma, Yin-Ge
    Su, Ji-Xin
    2015 4TH INTERNATIONAL CONFERENCE ON ENERGY AND ENVIRONMENTAL PROTECTION (ICEEP 2015), 2015, : 2184 - 2188
  • [24] An energy-saving drying treatment method for municipal sewage sludge
    Na, Wei
    MANUFACTURE ENGINEERING AND ENVIRONMENT ENGINEERING, VOLS 1 AND 2, 2014, 84 : 697 - 703
  • [25] Process Optimization of Microwave Drying Sludge with Response Surface Methodology
    Han-Muxin
    Li-Dongmei
    Feng-Yujie
    Tan-Yufei
    ADVANCES IN CHEMICAL ENGINEERING, PTS 1-3, 2012, 396-398 : 1269 - 1272
  • [26] Microwave drying performance of single-particle coal slime and energy consumption analyses
    Song, Zhanlong
    Jing, Chuanming
    Yao, Liansheng
    Zhao, Xiqiang
    Wang, Wenlong
    Mao, Yanpeng
    Ma, Chunyuan
    FUEL PROCESSING TECHNOLOGY, 2016, 143 : 69 - 78
  • [27] CONVECTIVE DRYING OF SEWAGE-SLUDGE
    SWANWICK, JD
    AIR AND WATER POLLUTION, 1965, 9 (06): : 379 - 380
  • [28] The drying of sewage sludge by immersion frying
    Silva, DP
    Rudolph, V
    Taranto, OP
    BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2005, 22 (02) : 271 - 276
  • [29] Contact drying of municipal sewage sludge
    Bauerle, H.G.
    Obers, H.
    Wischniewski, M.
    Aufbereitungs-Technik, 1988, 29 (05): : 243 - 251
  • [30] Developments in the thermal drying of sewage sludge
    J Inst Water Environ Manage, 3 (306):