气升式环流生物反应器微孔气体分布器结构优化与性能

doi:10.16085/j.issn.1000-6613.2020-0150

化工进展 ›› 2020, Vol. 39 ›› Issue (S1): 64-68.DOI: 10.16085/j.issn.1000-6613.2020-0150

气升式环流生物反应器微孔气体分布器结构优化与性能

何庆生(), 范景福, 张建成

中石化炼化工程（集团）股份有限公司洛阳技术研发中心，河南洛阳 471003

收稿日期:2020-02-02 出版日期:2020-05-20 发布日期:2020-06-29
通讯作者: 何庆生
作者简介:何庆生（1980—），男，硕士，高级工程师，研究方向为污水处理。E-mail：heqingsheng.segr@sinopec.com。
基金资助:
中国石油化工股份有限公司项目(309062)

Structural optimization of gas distributor in loop bio reactor

Qingsheng HE(), Jingfu FAN, Jiancheng ZHANG

(Luoyang R&D Center of Technology of Sinopec Engineering (Group) Co. , Ltd. , Luoyang 471003, Henan, China )

Received:2020-02-02 Online:2020-05-20 Published:2020-06-29
Contact: Qingsheng HE

摘要/Abstract

摘要：

目前，气升式环流生物反应器普遍使用管式气体分布器，管式气体分布器易堵塞，动力效率低。气泡粒径小，动力效率高的微孔气体分布器应用于气升式环流生物反应器的研究少有报道。本文为研究微孔气体分布器应用于气升式环流生物反应器的实际效果，对微孔气体分布器进行结构优化研究，考察分布器形式、直径和安装位置等因素对氧传质系数的影响，进而考察优化后的微孔气体分布器的充氧能力、氧利用率、动力效率等性能参数及其变化规律。指导微孔气体分布器的工业化应用。实验结果表明：盘式微孔气体分布器传质效果优于管式，且盘式微孔气体分布器直径为0.4R时，传质效果最佳；膜盘到导流筒底部距离为1R时，分布器的氧传质系数最大，R为导流筒半径；微孔气体分布器适宜的气体流量为1.5m³/h，充氧能力0.14kg/h，氧利用率为34.63%，动力效率为3.35kg/(kW·h)。

关键词: 环流生物反应器, 微孔气体分布器, 氧传质系数, 性能参数

Abstract:

At present, tubular gas distributor is widely used in airlift loop bioreactor, which is easy to block and has low power efficiency. There are few reports on the application of microporous gas distributor with small bubble size and high dynamic efficiency in airlift loop bioreactor. In order to study the actual effect of microporous gas distributor applied in airlift loop bioreactor, the structure optimization of microporous gas distributor was studied, and the influence of the type, diameter and installation position of the distributor on the oxygen mass transfer coefficient was investigated, and then the performance parameters such as the oxygen filling capacity, oxygen utilization rate and dynamic efficiency of the optimized microporous gas distributor and their change laws were investigated. The optimal design parameters were obtained of microporous gas distributor to provide guidance for their industrial application. The results showed that disc-type microporous distributor had a better mass transfer performance than the tube-type one. When the disc-type distributor diameter was 0.4R and the distance from the distributor to the draft-tube bottom was 1R, in which R is draft-tubeinner radius, the oxygen transfer coefficient was biggest. The study also indicated that the suitable gas rate was 1.5m³/h, and at this point, oxygenation capacity was 0.14 kg/h with oxygen utilization rate 34.63% and dynamic efficiency 3.35kg/(kW·h).

Key words: loop bio reactor, microporous gas distributor, oxygen transfer coefficient, performance parameters

中图分类号:

X 505

何庆生, 范景福, 张建成. 气升式环流生物反应器微孔气体分布器结构优化与性能[J]. 化工进展, 2020, 39(S1): 64-68.

Qingsheng HE, Jingfu FAN, Jiancheng ZHANG. Structural optimization of gas distributor in loop bio reactor[J]. Chemical Industry and Engineering Progress, 2020, 39(S1): 64-68.

图/表 8

图1 实验装置流程1—水泵；2—压缩机；3—气体流量表；4—氮气进气阀；5—环流床；6—挡板；7—溶氧电极；8—气体分布器；9—溶解氧仪；10—循环泵；11—沉降罐；12—水槽

图2 微孔气体分布器1—橡胶膜；2—支撑管；3—卡环套；4—连接件

图3 管式与盘式微孔分布器氧传质系数KLa对比

图4 分布器分布环直径对氧传质系数KLa的影响

图5 分布器安装位置对氧传质系数KLa的影响

图6 气体流量对充氧能力的影响

图7 气体流量对氧利用率的影响

图8 气体流量对动力效率的影响

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气升式环流生物反应器微孔气体分布器结构优化与性能

Structural optimization of gas distributor in loop bio reactor

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