Design Of Efficient Extraction System With Ultrasonic Coupled Heat Pump And Its Application On Mulberry Extraction

Chinese medicine extraction is one of the important links in the production of Chinese medicine.In order to apply the efficient extraction technology with ultrasonic coupled heat pump to industrial production as soon as possible,and also to lay a good experimental foundation and breakthrough direction for the subsequent equipment and energy-saving transformation of Xinglin Baima Pharmaceutical Factory,for this purpose,the development of the efficient extraction system with ultrasonic coupled heat pump was theoretically analyzed and designed to realize the system.Finally,the experiment of mulberry extraction,mass transfer analysis of mulberry extraction process and energy-saving and economic analysis were carried out based on this system.The specific research results are as follows:(1)The extraction liquid of mulberry was analyzed by UV spectrum.The mulberry anthocyanin is more stable under acidic conditions,and the maximum difference of absorbance is 535 nm in the spectrogram of mulberry anthocyanin under two sets of buffer environment,the absorban ce at the maximum difference can accurately reflect the content of anthocyanin in mulberry,so in the subsequent determination process,the wavelength 535 nm was used for the determination of mulberry anthocyanin content.In addition,the study showed that the equilibrium time of mulberry anthocyanin in the buffer environment of p H=1.0 was 35 min and the equilibrium temperature was 60℃;the equilibrium time in the buffer environment of p H4.5 was 40 min and the equilibrium temp erature was 60℃,which provided the experimental data reference for the next single-factor test.(2)The single-factor experiment of mulberry anthocyanin extraction was carried out by using efficient extraction equipment with ultrasonic coupled heat pump.According to the results of the single-factor experiment,the best single-factor extraction effect was achieved when the materialliquid ratio was selected as 1:14,the extraction temperature was selected as 50℃,and the extraction time was selected as 60 min.On this basis,the response surface analysis method was used to obtain the optimal extraction process under the comprehensive influence of three factors: extraction temperature of 52℃,extraction time of 58 min,material-liquid ratio of1:14.Based on the optimal extraction conditions,three heat pump extraction experiments were carried out,and the yield of anthocyanins obtained from Mulberry was 2.319mg/g,which was close to the theoretical value of 2.307mg/g.Finally,based on the process,the ultrasonic coupling test was carried out,and the best extraction effect was obtained when the ultrasonic power was 300W-400 W,and the yield of mulberry anthocyanin was further improved and reached more than 2.745mg/g.(3)The mass transfer process of anthocyanin extraction from mulberry was studied and a kinetic model was selected;in order to obtain the specific coefficients in the kinetic model,extraction kinetic experiments were carried out to study the influence of extraction temperature,material-toliquid ratio,ultrasonic power and particle radius on the mass transfer process in mulberry,and the interrelationship between the process cond itions and the coefficients was determined based on the kinetic exper imental data,and the specific coefficients of the kinetic model were derived,and the kinetic model of mulberry anthocyanin was constructed,and the corresponding kinetic equation was finally obtained,which can realize the prediction of the yield of mulberry anthocyanin under different process conditions.(4)The extraction performance comparison experiments were conduc ted between the extraction system of the pharmaceutical plant and the efficient extraction system with ultrasonic coupled heat pump,the results showed that the extraction yield of mulberry anthocyanin was 1.984 mg/g for the pharmaceutical plant extraction system and 2.745 mg/g for the efficient extraction system with ultrasonic coupled heat pump,and the extraction performance of the efficient extraction system with ultrasonic coupled heat pump was greatly improved.Finally,the energy-saving and economic analysis of the existing natural gas steam extraction system of the pharmaceutical plant,the existing coal-fired steam extraction system of the pharmaceutical plant and the efficient extraction system with ultrasonic coupled heat pump was conducted,and the study concluded that: when calculating the cost of each system,taking existing natural gas steam extraction system of the pharmaceutical plant as the base,compared with this system,the percentage of cost savings of the coal-fired extraction system of the pharmaceutical plant is 24.67%;the percentage of cost savings of the efficient extraction system with ultrasonic coupled heat pump compared with the system was 47.31%.When calculating the standard coal consumption of each system,taking the coal-fired extraction system of the pharmaceutical plant as the base,the percentage of standard coal consumption saved by the existing natural gas extraction system of the pharmaceutical plant compared with this system is 61.93%;the percentage of standard coal consumption saved by the efficient extraction system with ultrasonic coupled heat pump compared with this system is 31.89%.The analysis of energy-saving economy of the system shows that the use of efficient extraction system with ultrasonic coupled heat pump can not only save the cost of the decoction and extraction process of herbs,but also save resources,low carbon and environmental protection,respond to the national "double carbon" policy,and the energy-saving effect is very obvious.