用于乡村公共卫生安全的多功能气调机

新冠疫情爆发揭示了世界范围内公共卫生安全领域存在的艰巨挑战,尤其是公共基础设施弱、公共卫生安全意识薄弱的乡村地区.本文面向乡村防疫的特性需求,基于气固吸附和固载二氧化氯技术,开发了一种兼具灭菌、驱虫和富碳施肥的新型气调机装置.机组采用四床变电吸附(ESA)碳捕集与变压吸附(PSA)制氮循环结合的方法,对CO2和N2进行...

A Multi-function Gas Conditioner Used for Public Anti-epidemic Measures and Health in Rural Region

The outbreak of COVID-19 has revealed significant challenges in the field of public health security worldwide, especially in rural regions where public infrastructure is poor and public health security is insufficient. In this study, a new type of gas conditioner that combines the functions of sterilization, insect repelling, and carbon-rich fertilization is proposed considering the characteristics of rural anti-epidemic measures. The conditioner unit is based on gas-solid adsorption and solid chlorine dioxide technology. The unit adopts the method of combining four-bed electric swing adsorption carbon capture combined with a pressure swing adsorption nitrogen generation cycle method to enrich CO2 and N2. At the same time, solid chlorine dioxide is applied to the adsorbent to achieve sterilization. Based on test data and simulation models, we analyzed the effects of the temperature difference on the adsorption and desorption temperatures in the carbon capture cycle, and the outlet flow rate. We also analyzed the effects of the adsorption pressure in the nitrogen generation cycle on the separation performance (recovery rate, purity, and productivity) and energy-efficient performance (specific energy consumption, minimum separation work, second-law efficiency) of the gas conditioner. The results show that the CO2 recovery rate, purity, and productivity all increase with temperature difference; the purity of N2 decreases with an increase in outlet flow rate, and increases with the adsorption pressure; the N2 recovery rate and productivity improve with an increase in outlet flow rate and adsorption pressure; the specific energy consumption of the system increases with the increase in the adsorption pressure, and decreases with an increase in the temperature difference and the outlet flow rate; the second law efficiency shows the opposite trend to the specific energy consumption. The simulation results show that when the temperature difference is 105 K, the outlet flow rate is 0.01 m/s, and the adsorption pressure is 1 MPa, the purity of CO2 and N2 both reach the maximum, which are 80.6% VOL and 97.05% VOL, respectively. The specific energy consumption of the system was 2.13 MJ/kg, the efficiency of the second law was 4.71%, and the energy efficiency performance was better. Even under other operating conditions, the purity of CO2 is generally better than 60% VOL, N2 is generally better than 95% VOL, and other performance parameters of the system can also reach a higher level.