超重力法处理室内过量CO_2的实验研究

Experimental research on high gravity method treatment of excessive indoor CO_2

分析了几种常用的室内处理CO2气体方法的优缺点，其中传统方法吸收过程复杂且设备密封要求较高，虽然膜分离技术选择性较好，但是常温下压降为5～30kPa，稳定性差。基于超重力技术运行稳定，且湿床压降仅为150Pa的优势，本文提出了超重力法对室内低浓度的过量CO2气体进行处理，通过考察超重力因子、气液比、气体浓度对脱除效果的影响，确定了适宜的实验脱除条件：超重力因子13l，气液比60。在适宜的实验脱除条件下，超重力法对室内不同浓度CO2气体的单次吸收率均达到26％以上且反应时间在0．1s以内，经过8次循环CO2气体浓度从13750mg／m3下降到800mg／m3以下，脱除率达到90％以上。因此，采用超重力法处理室内过量CO2气体在技术上是可行的。

This paper analyzes the advantages and disadvantages of several common methods dealing with indoor CO2. The traditional method of absorption is complex and requires a high degree of sealing device. Membrane separation technology has good selectivity, but at room temperature pressure drop is 5 - 30kPa and stability is poor. Based on the advantage of running stability and wet bed pressure drop of only 150Pa of high-gravity technology, this paper presents a method of using high-gravity technology to process indoor low concentration excessive CO2. By investigating high-gravity factor, gas-liquid ratio and gas concentration on removal effect, the the appropriate removal experiment condition is as follows： high-gravity factor is 131 and gas-liquid ratio is 60. Under the appropriate removal experiment condition, single cycle absorption rate for indoor different concentrations of CO2 reaches more than 26%, reaction time is less than 0.1 s, CO2 concentration decreases from 13750 mg/m3 to less than 800 mg/m3 after 8 cycles and removal rate is up to 90%. Therefore, the high-gravity method to deal with indoor excessive CO2 is feasible in technology.