HNO3/H2O2烟气脱硝兼微藻养殖组合工艺

石油炼制与化工 ›› 2022, Vol. 53 ›› Issue (1): 105-111.

HNO₃/H₂O₂烟气脱硝兼微藻养殖组合工艺

苏士焜,郭宝文,宗保宁,荣峻峰,朱俊英

中国石化石油化工科学研究院

收稿日期:2021-03-25 修回日期:2021-09-08 出版日期:2022-01-12 发布日期:2021-12-24
通讯作者: 宗保宁 E-mail:zongbn.ripp@sinopec.com

COMBINED PROCESS OF HNO3/H2O2 FOR FLUE GAS DENITRATION AND MICROALGAE CULTIVATION

Received:2021-03-25 Revised:2021-09-08 Online:2022-01-12 Published:2021-12-24

摘要/Abstract

摘要： 采用HNO₃/H₂O₂酸性氧化吸收液对含NO_x模拟烟气进行脱硝处理，并以脱硝后的吸收液作为微藻养殖的氮源。分析吸收塔填料高度对烟气脱硝效果的影响；考察烟气中金属离子含量、微藻培养液中微量元素含量和pH对吸收液中H₂O₂分解的影响；探究HNO₃/H₂O₂用于蛋白核小球藻培养所需氮源的可行性。结果表明：吸收塔中加载填料能够增强气液接触效果，在保证脱硝率的前提下有效降低液气比；烟气中的铁、钴、镍离子易导致_H₂O₂的分解；含微量元素的微藻培养液、弱酸性培养环境有利于_H₂O₂分解；用HNO₃作氮源时蛋白核小球藻生长速率比用NaNO₃作氮源时更高，氮源中含有少量H₂O₂不影响微藻的生长。

关键词: 硝酸, 过氧化氢, 脱硝, 微藻

Abstract: The HNO₃/H₂O₂ oxidation absorption solution is used to denitrate the simulated flue gas containing NO_x, and the absorption solution after denitration is used as the nitrogen source for microalgae cultivation. The effects of different heights of the packing on the denitration of flue gas, the contents metal ions in flue gas, trace elements in the microalgae medium and pH of the medium on the decomposition rate of H₂O₂ in the absorption solution were investigated to explore the feasibility of using HNO₃/H₂O₂ as a nitrogen source for the growth of Chlorella pyrenoidosa. The results show that the addition of packing in the absorption column can strengthen the gas-liquid contact and effectively reduce the liquid-gas volume ratio under the premise of ensuring a certain denitration rate. The iron, cobalt, and nickel ions in the flue gas can easily cause the decomposition of H₂O₂. The microalgae medium containing trace elements and weakly acidic environment are conducive to the decomposition of H₂O₂. The growth rate of Chlorella pyrenoidosa is higher when HNO₃ is used as the nitrogen source than that of NaNO₃, and the growth of microalgae is not affected when there is a small amount of H₂O₂in the absorption solution of nitrogen source.

Key words: nitrate, peroxide, denitration, microalgae

苏士焜郭宝文宗保宁荣峻峰朱俊英. HNO₃/H₂O₂烟气脱硝兼微藻养殖组合工艺[J]. 石油炼制与化工, 2022, 53(1): 105-111.

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HNO₃/H₂O₂烟气脱硝兼微藻养殖组合工艺

COMBINED PROCESS OF HNO3/H2O2 FOR FLUE GAS DENITRATION AND MICROALGAE CULTIVATION

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