Mobile solar drying room: it is no longer difficult to dry the agricultural products in Tiantou

September 9, 2019

Mobile solar drying room: it is no longer difficult to dry the agricultural products in Tiantou


On August 27th, a glass house with a length of 8 meters and a width of 2.5 meters was seen by the reporter at the Jiangdu Practice Base of Yangzhou University. It is not a common ordinary car that we usually use, but it can be pulled by simply adding a tire to the bottom. Walk the mobile solar smart drying room.

“The house uses solar energy, biomass energy, and electric energy to complement each other and intertwined. It can be combined into different types of drying modes according to different use objects.” Undertake national key research and development plan “Multi-energy complementary bacteria drying device developed with its intelligent control technology” Professor Zhang Jianfeng of the School of Mechanical Engineering of Yangzhou University said that the equipment can not only achieve several times absorption of solar energy, but also use vacuum glass to achieve light transmission and heat preservation, and use clean, low-carbon biomass energy as a supplementary energy source for the drying room. While the machine is running all the time, it is truly high-quality, high-efficiency, energy-saving and environmentally friendly. It changes the traditional energy consumption of fruits and vegetables, and it has low energy consumption, low efficiency and unguaranteed quality.

The reporter learned that the traditional method of drying fruits and vegetables relies on natural drying and drying to make the water in the raw materials of fruits and vegetables evaporate. This method is limited by climatic conditions, low level of technology, product quality is difficult to guarantee, and it is unable to meet the needs of large-scale production. . In recent years, some artificial drying equipments have appeared one after another, but the conventional hot air drying equipment has high energy consumption and heavy coal burning pollution. The emerging technologies such as microwave drying, far infrared drying and freeze drying have high equipment costs and are not easy to promote.

“Since the project was established in 2018, the school research team has formed a research team involving multidisciplinary experts to solve some problems encountered in the deep processing of agricultural products, and to focus on the research and use of solar energy for the first time in China. And the multi-energy complementary drying scheme of electric energy." Zhang Ruihong, a famous agricultural machinery expert in China and a professor of mechanical engineering at Yangzhou University, said.

Zhang Jianfeng introduced that the mobile solar smart drying room has made bold breakthroughs in hardware design. The scientific research team innovatively uses vacuum flat glass with good heat collection and heat preservation performance to construct a solar drying room with two sides of light transmission, and uses a cross flow fan and a centrifugal fan as the power source for heat energy collection and air convection drying, which greatly improves the solar energy utilization efficiency and reduces The manufacturing cost of the unit solar energy utilization area.

At the same time, a retractable retro reflector was designed on the front of the drying room to reflect sunlight. Among them, the device's adaptive retracting system with hydraulic device can control the expansion board to freely retract according to weather and day and night conditions. This design can effectively improve the insulation efficiency of the drying room and the mobility of solar energy absorption, and also facilitate the transportation and use of equipment.

In addition, considering the instability of solar energy, the research team adopted the clean and renewable biomass energy of straw granules as a supplementary energy source for dry rooms, practicing the concept of multi-complementary energy conservation and environmental protection, so that the drying room can be used at all times. Work around the clock, protected from weather changes and day and night changes.

The reporter learned that the intelligence of the mobile solar smart drying room is mainly reflected in its intelligent temperature and humidity control system with multi-sensor fusion. The system consists of multiple types of sensors, water concentration tester, data acquisition card, computer, control circuit, etc., online monitoring and conversion of various types of signals in the equipment into multi-information data, with high-precision real-time mode classification system for processing, The stored information is compared to the stored information in the database, and the feedback of the analysis results is applied to the heating to ensure that the temperature, humidity, light, and atmosphere concentration in the dry room are always at an optimum state. This not only enables the drying room to operate in an energy-efficient state, but also ensures maximum saturated moisture discharge, maximizing the drying energy consumption, and freely adjusting the drying temperature to ensure the dry quality of the fruit and vegetable products and significantly improve the product. Quality truly reflects the innovative combination of equipment and agronomy.

“Based on the development and utilization of solar energy, it is in line with China's national conditions and is conducive to large-scale promotion. Especially in Xinjiang, Qinghai, Ningxia, Tibet and other areas with long sunshine hours and large demand for dried fruits and vegetables, the application advantages are very prominent. At the same time, we use versatile Complementary modern technology can overcome many shortcomings of traditional sun drying methods, making Tiantou agricultural products processing no longer 'difficult.' Zhang Ruihong said that at present, the research team has completed the development and finalization of mobile solar smart drying rooms. And has applied for a patent. Starting this year, it will take the lead in the demonstration and application of the Aksu region in Xinjiang, and gradually carry out comprehensive promotion in the central and western regions.