| 摘要: |
| 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进行富集；同时，将固载二氧化氯应用于吸附剂中，实现一定强度的杀菌效果。基于测试数据和模拟模型，对碳捕集循环中吸附和解吸温度的温差、制氮循环中出口流速和吸附压力对该气调机的分离性能（回收率、纯度、生产率）和能效性能（比能耗、最小分离功、第二定律效率）的影响进行分析。结果表明：CO2的回收率、纯度、生产率均随温差的增大而升高；N2的纯度随出口流速的增大而降低，随吸附压力的增大而升高；N2回收率和生产率随出口流速和吸附压力的升高均呈现上升的趋势；系统比能耗随吸附压力的升高而升高，随温差和出口流速的增大均呈现降低的趋势；第二定律效率呈现与比能耗相反的变化趋势。模拟结果显示：当温差为105 K，出口流速为0.01 m/s，吸附压力为1 MPa时，CO2和N2纯度均达到最大值，体积分数（VOL）分别为80.6% 和97.05%，此时系统比能耗为2.13 MJ/kg，第二定律效率为4.71%，能效性能处于较好水平；即使在其他操作条件下，CO2纯度普遍高于60%VOL，N2纯度普遍高于95%VOL，系统其他性能参数均可达到较高水平。 |
| 关键词: 气调技术 二氧化碳捕集 气态施肥 绿色消杀 固载二氧化氯 |
| DOI： |
| 投稿时间：2021-01-06 修订日期：2021-06-17
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| 基金项目:国家自然科学基金(51876134)，天津市自然科学基金面上项目 (19JCYBJC21600)资助。 |
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| A Multi-function Gas Conditioner Used for Public Anti-epidemic Measures and Health in Rural Region |
| Wu Kailong,Deng Shuai,Chen Bing,Zhao Ruikai,Zhao Li,Li Shuangjun |
| (Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education of China, Tianjin University) |
| Abstract: |
| 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. |
| Key words: gas conditioner technology CO2 capture gaseous fertilization green disinfection solid chlorine dioxide |
