Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i>
To address the problems of the time consumption, labor intensiveness, easy contamination, uneven drying, and impact on the medicinal efficacy of <i>Fritillaria ussuriensis</i> in the traditional drying method, the hot-air-drying characteristics of <i>Fritillaria ussuriensis</i&g...
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2025-07-01
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| author | Liguo Wu Jiamei Qi Liping Sun Sanping Li Qiyu Wang Haogang Feng |
| author_facet | Liguo Wu Jiamei Qi Liping Sun Sanping Li Qiyu Wang Haogang Feng |
| author_sort | Liguo Wu |
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| description | To address the problems of the time consumption, labor intensiveness, easy contamination, uneven drying, and impact on the medicinal efficacy of <i>Fritillaria ussuriensis</i> in the traditional drying method, the hot-air-drying characteristics of <i>Fritillaria ussuriensis</i> were studied. The changes in the moisture ratio and drying rate of <i>Fritillaria ussuriensis</i> under different hot-air-drying conditions (45 °C, 55 °C, 65 °C) were compared and analyzed. Six common mathematical models were used to fit the moisture change law, and it was found that the cubic model was the most suitable for describing the drying characteristics of <i>Fritillaria ussuriensis</i>. The R<sup>2</sup> values after fitting under the three temperature conditions were all greater than 0.99, and the maximum was achieved at 45 °C. Based on the principle of hot-air drying, a drying device for <i>Fritillaria ussuriensis</i> with a processing capacity of 15 kg/h was designed. It adopted a thermal circulation structure of inner and outer drying ovens, with the heating chamber separated from the drying chamber. The structural parameters were optimized based on Fluent simulation analysis. After optimization, the temperature of each layer was stable at 338 K ± 2 K, and the pressure field and velocity field were evenly distributed. The drying process parameters of <i>Fritillaria ussuriensis</i> were optimized based on response surface analysis, and the optimal process parameters were obtained as follows: inlet temperature: 338 K (65 °C), inlet air velocity: 3 m/s, and drying time: 10 h. The simulation results showed that the predicted moisture content of <i>Fritillaria ussuriensis</i> under the optimal working conditions was 12.58%, the temperature difference of <i>Fritillaria ussuriensis</i> at different positions was within 0.8 °C, and the humidity deviation was about 1%. A prototype of the drying device was built, and the drying test of <i>Fritillaria ussuriensis</i> was carried out. It was found that the temperature and moisture content of <i>Fritillaria ussuriensis</i> were consistent with the simulation results and met the design requirements, verifying the rationality of the device structure and the reliability of the simulation model. This design can significantly improve the distribution of the internal flow field and temperature field of the drying device, improve the drying quality and production efficiency of <i>Fritillaria ussuriensis</i>, and provide a technical reference for the Chinese herbal medicine-drying industry. |
| format | Article |
| id | doaj-art-a4c44ee220c4449bb5787c19cc47ecd1 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
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| spelling | doaj-art-a4c44ee220c4449bb5787c19cc47ecd12025-08-20T04:00:54ZengMDPI AGApplied Sciences2076-34172025-07-011515842710.3390/app15158427Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i>Liguo Wu0Jiamei Qi1Liping Sun2Sanping Li3Qiyu Wang4Haogang Feng5School of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, ChinaTo address the problems of the time consumption, labor intensiveness, easy contamination, uneven drying, and impact on the medicinal efficacy of <i>Fritillaria ussuriensis</i> in the traditional drying method, the hot-air-drying characteristics of <i>Fritillaria ussuriensis</i> were studied. The changes in the moisture ratio and drying rate of <i>Fritillaria ussuriensis</i> under different hot-air-drying conditions (45 °C, 55 °C, 65 °C) were compared and analyzed. Six common mathematical models were used to fit the moisture change law, and it was found that the cubic model was the most suitable for describing the drying characteristics of <i>Fritillaria ussuriensis</i>. The R<sup>2</sup> values after fitting under the three temperature conditions were all greater than 0.99, and the maximum was achieved at 45 °C. Based on the principle of hot-air drying, a drying device for <i>Fritillaria ussuriensis</i> with a processing capacity of 15 kg/h was designed. It adopted a thermal circulation structure of inner and outer drying ovens, with the heating chamber separated from the drying chamber. The structural parameters were optimized based on Fluent simulation analysis. After optimization, the temperature of each layer was stable at 338 K ± 2 K, and the pressure field and velocity field were evenly distributed. The drying process parameters of <i>Fritillaria ussuriensis</i> were optimized based on response surface analysis, and the optimal process parameters were obtained as follows: inlet temperature: 338 K (65 °C), inlet air velocity: 3 m/s, and drying time: 10 h. The simulation results showed that the predicted moisture content of <i>Fritillaria ussuriensis</i> under the optimal working conditions was 12.58%, the temperature difference of <i>Fritillaria ussuriensis</i> at different positions was within 0.8 °C, and the humidity deviation was about 1%. A prototype of the drying device was built, and the drying test of <i>Fritillaria ussuriensis</i> was carried out. It was found that the temperature and moisture content of <i>Fritillaria ussuriensis</i> were consistent with the simulation results and met the design requirements, verifying the rationality of the device structure and the reliability of the simulation model. This design can significantly improve the distribution of the internal flow field and temperature field of the drying device, improve the drying quality and production efficiency of <i>Fritillaria ussuriensis</i>, and provide a technical reference for the Chinese herbal medicine-drying industry.https://www.mdpi.com/2076-3417/15/15/8427drying device<i>Fritillaria ussuriensis</i>drying testFluent simulationthermal fluid–solid coupling |
| spellingShingle | Liguo Wu Jiamei Qi Liping Sun Sanping Li Qiyu Wang Haogang Feng Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> Applied Sciences drying device <i>Fritillaria ussuriensis</i> drying test Fluent simulation thermal fluid–solid coupling |
| title | Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> |
| title_full | Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> |
| title_fullStr | Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> |
| title_full_unstemmed | Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> |
| title_short | Design of and Experimental Study on Drying Equipment for <i>Fritillaria ussuriensis</i> |
| title_sort | design of and experimental study on drying equipment for i fritillaria ussuriensis i |
| topic | drying device <i>Fritillaria ussuriensis</i> drying test Fluent simulation thermal fluid–solid coupling |
| url | https://www.mdpi.com/2076-3417/15/15/8427 |
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