Research on Energy Saving and Environmental Protection Electric Power Grain Circulation Drying System


Grain drying
Electric power
Energy environment protection
Energy conservation protection

How to Cite

Wang G, Qiao F, Yue Z. Research on Energy Saving and Environmental Protection Electric Power Grain Circulation Drying System. J. Adv. Therm. Sci. Res. [Internet]. 2022 Jun. 20 [cited 2022 Aug. 12];9:38-49. Available from:


A 50-ton/batch electric grain circulation drying system was designed that adopted clean electric energy as a drying heat source. The exhaust gas of the dryer was recycled after condensation and dehumidification. The drying system has the advantages of energy saving and environmental protection. The corn drying test showed that the specific heat consumption was 3185 kJ/kg H2O in close operating mode, compared to the Chinese standard of 5700 kJ/kg H2O, and the energy consumption ratio was 44%. This research pioneers a way of saving energy and protecting the environment from drying and comes up with a new thought on how to utilize the waste heat from exhaust gas and the latent heat released by the evaporation of water vapor reasonably.


Mustaffar A, Phan A, Boodhoo K. Hybrid heat pipe screw dryer: A novel, continuous and highly energy efficient drying technology. Chem Eng Process. 2018; 128: 199-215.

Tohidi M, Sadeghi M, Torki-Harchegani M. Energy and quality aspects for fixed deep bed drying of paddy. Renew Sust Energ Rev. 2017; 70:519-528. 10.1016/j.rser.2016.11.196.

Chen KJ, Chen QC, Zhang Y. Energy consumption for grain drying in china. Transactions of the CSAE 2005; 21(5): 173-177.

Liu DY, Cao CW. Explore the new development path of drying technology in China. General machinery 2006; (7): 15-17.

Zhang DY. Saving energy and reducing pollutants in the drying systems. Chemical Machinery 2009; 36(3): 195-199.

Li X Q. Study on the design of energy saving and environmental protection grain dryer. China Plant Engineering 2019; (2): 198-199.

Afzali F, Darvishi H, Behroozi-khazaei N. Optimizing exergetic performance of a continuous conveyor infrared-hot air dryer with air recycling system. Appl Therm Eng. 2019; 154:358-367.

Zohrabi S, Seiiedlou SS, Aghbashlo M, et al. Enhancing the exergetic performance of a pilot-scale convective dryer by exhaust air recirclation. Drying Technol. 2019; 38(4): 518-533.

Ziegler T, Jubaer H, Schütz. Increasing the energy efficiency of batch-type drying with partial air recirculation. Chem Ing Tech. 2016; 88(1-2): 208-214.

Di K, Li J. New technology and equipment of energy saving and emission reduction on grain drying system in China. Cereal & Feed Industry 2011; (12): 16-21.

Di K, Li J, Ma YX, et al. Approaches to energy saving in grain drying process. Drying Technology & Equipment 2005; 3(4): 207-210.

Gao SC, Wang DH, Zhao XG, et al. Application and practice of rice husk pellet filling molding fuel in grain drying system. Grain Processing 2018; 43(3): 26-27.

Qu XR. Cleaner production and circular economy. Beijing: Qinghua University Press 2011.

Zhan ZX, Xing ZQ, Wei B, et al. Test & research on the used hot-blast parameters of grain drier. Transactions of the CSAE 2000; 16(3): 88-90.

Wu WF. etc. Energy-saving condensing, circulating and heating batch type recirculating grain drying device, Chinese patent: 208943774. 2019.

Chen SY. Study on heat and humidity migration and granary aeration management based on absolute water potential. Changchun: Biological and Agricultural Engineering Institute, Jilin University, 2016.

Shen JB, Guo T, Tian YF, etc. Design and experimental study of an air source heat pump for drying with dual models of single stage and cascade cycle. Appl Therm Eng. 2018; 129: 280-289.

Chapchaimoh K, Poomsa-ad N, Wiset L, etc. Thermal characteristics of heat pump dryer for ginger drying. Appl Therm Eng. 2016; 95:491-498.

Zlatanovic I, Komatina M, Antonijevic D. Experimental investigation of the efficiency of heat pump drying system with full air recirculation. J Food Process Eng. 2017; 40: e12386.

Zhang Y L, Yin K D, Long C S, et al. Application and prospects of the agricultural product drying using the heat pump in china. Journal of Agricultural Mechanization Research, 2014; (5): 1-7.

Song XY, Zhong Y, Deng Y. Status and development trend of heat pump drying technique. Journal of Shanghai Jiaotong University 2014; 32(4): 60-66.

Lou Z, Liu Q, Zhao Y Q, et al. Application of air source heat pump drying technology in post-harvest treatment of agricultural products. Agricultural Engineering 2017; 7(5): 68-72.

Gao HF. The research on on-line moisture detection and control system based on the total weight detection for grain circulate drying [D]. Changchun: Biological and Agricultural Engineering Institute, Jilin University, 2014.

GB/T 14095-2007, Technical terms for drying agricultural products [S].

Q/ZCL 14-2013, Technical specification for inspection and acceptance of complete set of grain drying equipment [S].

T/CAMDA 6-2019, Technical specification for acceptance of grain drying center [S].

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Copyright (c) 2022 Guiying Wang, Fengxiang Qiao, Zhongfen Yue