文献类型：期刊文献

中文题名：π型向心径向流吸附器气-固两相模型传热传质特性

英文题名：Heat and mass transfer characteristics of the gas-solid two-phase model in a π-shaped centripetal radial flow adsorber

作者：王浩宇[1];刘应书[2];张传钊[1];陈福祥[1];马晓钧[1];李春旺[1]

第一作者：王浩宇

通讯作者：Zhang, Chuan-Zhao

机构：[1]北京联合大学生物化学工程学院,北京100023;[2]北京科技大学能源与环境工程学院,北京100083

第一机构：北京联合大学生物化学工程学院

年份：2019

卷号：41

期号：11

起止页码：1473-1483

中文期刊名：工程科学学报

外文期刊名：Chinese Journal of Engineering

收录：CSTPCD;;EI(收录号：20200808195662);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：北京市自然科学基金资助项目(8182019);北京市教育委员会科技计划一般资助项目(KM201711417014);国家自然科学基金资助项目(51578065)

语种：中文

中文关键词：径向流;吸附;π型向心;两相流;数值模拟

外文关键词：radial flow;adsorption;π-shaped centripetal;two phase flow;numerical simulation

摘要：为了明确径向流吸附器变压吸附制氧的传热传质规律并提高制氧效率,建立π型向心径向流吸附器(CP-πRFA)的气固耦合两相吸附模型,通过计算流体力学方法对能量模型、吸附热以及颗粒尺寸等因素进行了数值模拟.结果表明:单相模型在加压过程和吸附过程中床层内最高温度分别为309.19 K和311.63 K,氧气摩尔分数最高值分别为55.66%和62.65%;同等条件下两相模型在加压过程和吸附过程中床层内最高温度分别为302.27 K和305.29 K,氧气摩尔分数最高值分别为57.51%和66.02%.未考虑吸附热的加压过程和吸附过程床层内最高温度分别为293.5 K和293.9 K,氧气摩尔分数最高值分别为59.25%和72.18%;同等条件下考虑吸附热时在加压过程和吸附过程中床层内最高温度分别为302.3 K和305.3 K,氧气摩尔分数最高值分别为57.51%和66.02%.随着颗粒直径的增加,出口产品气的氧气摩尔分数逐渐下降,同时产品气流量与回收率逐渐增加,颗粒直径1.6 mm为最佳吸附剂颗粒直径.本实验获得了吸附器内部传热传质规律,为CP-πRFA用于变压吸附制氧提供重要的技术参考.
In order to investigate the heat and the mass transfer during pressure swing adsorption(PSA) for oxygen production and improve oxygen production efficiency, a gas-solid two-phase pressure swing adsorption model was established for the π-shaped centripetal radial flow adsorber(CP-π RFA). The energy model, the adsorption heat, and the particle diameter were comparatively studied using this model. The results show that the maximum temperature in the adsorbent bed during pressurization with air(PR) and high-pressure feed(AD) processes for the single-phase model are 309.19 K and 313.63 K, respectively. The highest oxygen mole fractions in the adsorbent bed during PR step and AD step using the single-phase model are 55.66% and 62.65%, respectively. Under the same operating conditions, the maximum temperature in the adsorbent bed during the PR and AD steps for the two-phase model are302.27 K and 305.29 K, respectively. The highest oxygen mole fractions in the adsorbent bed during PR step and AD step using the twophase model are 57.51% and 66.02%, respectively. For no-adsorption heat, the maximum temperatures are 293.5 K and 293.9 K, respectively, and the highest oxygen mole fractions in the adsorbent bed during the PR step and AD step with no-adsorption heat are 59.25%and 72.18%,respectively.However,the maximum temperature in the bed during the two steps with adsorption heat are 302.3 K and 305.3 K,respectively,and the highest oxygen mole fractions are 57.51%and 66.02%,respectively.As the particle diameter increases,the highest oxygen mole fraction of the outlet would decrease,while the oxygen flow rate and recovery would increase.The adsorbent with a particle diameter of 1.6 mm is the best size.The laws of the heat and the mass transfer in the adsorber can provide an important technical reference for CP-πRFA in the PSA for oxygen production.