Microwave Intermittent Drying of Ginkgo biloba Fruit

ABSTRACT: In order to explore the best microwave intermittent drying technology of Ginkgo biloba fruit, microwave power, heating time and intermittent time were selected as experimental factors, average drying energy consumption, mass drying rate and sensory quality score after drying of microwave drying equipment were taken as evaluation indexes, quadratic orthogonal regression test was used to optimize the microwave intermittent drying technology of Ginkgo biloba fruit, and Backward analysis method was used to establish the second one. Secondary regression mathematical model, and response surface analysis of regression model.

microwave drying equipment

The results show that the selected experimental factors have a significant influence on the drying process, and the order of strength is heating time > microwave power > intermittent time. There is interaction between the experimental factors.

The optimum drying parameters of Ginkgo biloba fruit were microwave power 4.5 W/g, heating 6.5 s and intermittent 80 s. Under these conditions, the drying rate was 0.157 kg/(h.kg), the average energy consumption was 65.54 kJ/g, and the sensory quality score was 8.5. The experimental results have certain reference value for improving drying equipment and microwave drying of Ginkgo biloba fruit.

microwave drying of Ginkgo biloba fruit 

Effects of Different Drying Technologies on the Quality of Dendrobium nobile Leaves

Objective: To study the effects of different drying processes on the quality of Dendrobium nobile leaves, and to provide theoretical basis for improving the initial processing and expanding the medicinal parts of Dendrobium nobile.

microwave drying equipment

METHODS: Dendrobium nobile leaves were dried by hot air drying, microwave drying equipment, vacuum drying and vacuum freeze drying. The effects of four drying methods on color, microstructure, total polysaccharides and content of Dendrobium nobile leaves were investigated.

Result: The color of vacuum freeze-drying product was the best, which was superior to the other three drying methods. Different drying methods have different microstructures. The total polysaccharide content of Dendrobium nobile leaves after vacuum freeze drying, vacuum drying, hot air drying and microwave drying were 3.11%, 3.02%, 2.81% and 2.74%, respectively. Different drying processes have great influence on the content of total polysaccharides in Dendrobium nobile leaves, but little influence on the content of Dendrobium alkali.

microwave drying of Dendrobium nobile leaves 

Effect of drying process on Anthraquinone stability of rhubarb

Rhubarb, as a commonly used Chinese medicine, has a long history in Chinese medicine. It is the dried root and rhizome of Polygonaceae perennial herbs, such as Rhubarb palmatum, Rhubarb tanguticum or Rhubarb medicinal. It was found that the main chemical constituents were anthraquinones. In addition, tannins and a small amount of rhubarb glycosides and aglycones were also found.

Microwave drying equipment 

Modern pharmacological studies have proved that anthraquinones in rhubarb have the functions of purging, protecting liver and gallbladder, anti-bacterial and promoting pancreatic secretion, inhibiting pancreatic enzyme activity and protecting pancreatic islets. They can be used to treat cholelithiasis, acute tonsillitis and acute pancreatitis in clinic.

Microwave drying of traditional Chinese medicine 

Research and Application of Drying Technology of Raw Material Drug Slag

Absrtact: Before burning streptomycin residue, the moisture content of the residue should be reduced to 20%.Microwave dryer, rotary flash dryer, soft granulator and vertical plate dryer were used to dry streptomycin residue.

Microwave dryer

The experimental results show that the two-stage drying technology of raw material drug bacterial residue by pelletizer and tray dryer is advanced, which can meet the requirement of moisture content for incineration treatment of bacterial residue after drying. However, the control of drying time of steam content in the drying process of each kind of bacterial residue needs to be further explored.

Key words: API; streptomycin; bacterial residue; drying technology; two-stage drying of soft granulator and vertical plate dryer; microwave drying of traditional Chinese medicine

Huasheng North China Pharmaceutical Company mainly produces streptomycin and dihydrostreptomycin in two production lines. Streptomycin and dihydrostreptomycin are filtered by ceramic membrane and centrifuge respectively. The filtrate is collected and extracted. The filtrate is filtered by plate and frame to form a bacterial residue or mud with 80% water content. The output is 30 t/d.

microwave drying of traditional Chinese medicine 

Development Status of Grain Drying Mechanization Technology

Absrtact: This paper mainly introduces the mechanization technology and research status of grain drying, such as hot air drying, low temperature vacuum drying, warehouse drying, infrared radiation drying, microwave drying equipment, solar energy drying and combined drying, in order to provide a reference for the healthy and rapid development of grain drying mechanization technology and equipment.

microwave drying equipment 

Key words: grain microwave drying; hot air drying; combined drying; mechanized technology

China is a big country in grain production, storage and consumption. Food security is a major strategic issue related to the national economy and people’s livelihood. According to the announcement of the National Bureau of Statistics on the grain output in 2016, China’s total grain output in 2016 was 61,623.9 million tons, of which 56,516.5 million tons were cereals. However, the degree of mechanized grain drying is relatively low in China. The level of mechanized grain drying is less than 10%, which is the “short board” of the whole mechanization of agriculture.
grain microwave drying 

Research Progress of Rice Drying Technology

ABSTRACT: The achievements of microwave drying equipment and technology for rice drying and the research of rice drying quality were summarized, and the relationship between drying technology and rice drying quality was discussed in order to provide reference for the research of rice drying technology.

microwave drying equipment 

Key words: rice microwave drying; quality

The rice should be dried in time after harvest, otherwise it will have an important impact on the subsequent rice production, processing and preservation. According to the estimates of relevant departments, more than 5 million tons of cereals are lost every year because they cannot be dried in time. Therefore, timely drying and precipitation of rice is of great significance to rice production and processing.

Drying technology is an indispensable technology in modern industrial and agricultural production. The drying effect will directly affect the quality and shape of products. Drying technology includes complex mechanism of mass transfer and heat transfer, which involves a wide range of disciplines and is closely related to the characteristics of drying materials.
rice microwave drying 

Study on Internal Stress and Quality of Soybean Dryed by Microwave

Absrtact: In order to solve the problem that microwave drying equipment is prone to internal overheating and waist quality damage, the moisture content, internal temperature, bursting waist rate and mechanical strength of dry soybean products were studied in a rectangular microwave cavity with microwave absorption efficiency of 41.5%.

microwave drying equipment

The results showed that when the microwave output power density was less than 0.2W/g (effective absorption power density was less than 0.1W/g), the quality of soybean could be guaranteed. The bursting waist rate of soybean could be controlled under the industrial requirement of 5 (2% in this paper); the internal temperature of soybean was lower than the denaturation temperature of protein 60 C, and the extremum pressure of soybean dried products was 101.11N.
microwave drying soybean