降低可再生能源水电解制氢时氧中氢安全风险的措施  

Measures to Reduce the Safety Risk of Hydrogen in Oxygen During Hydrogen Production by Hydrogen Electrolysis from Renewable Energy Sources

作　　者：梁峰[1] Liang Feng(SINOPEC Qingdao Refining and Chemical Co.,Ltd.,Shandong,Qingdao,266500)

机构地区：[1]中国石化青岛炼油化工有限责任公司,山东青岛266500

出　　处：《安全、健康和环境》2024年第8期11-16,共6页Safety Health & Environment

摘　　要：可再生能源水电解制氢在低负荷运行时氧中氢含量超标容易导致安全风险,针对碱液互混、隔膜两侧气体分压差和运行负荷对氧中氢含量的影响,分析认为主要是分离罐后的碱液互混所导致,其对指标影响的占比超过50%,提出了降低氧中氢安全风险的改进措施,在普遍使用的碱水电解制氢流程中,增加碱液脱气罐,同时对补水泵进行适应性增容改造,可消除碱液互混对氧中氢的影响,即使在10%的低负荷下运行也可实现副产氧气中氢含量1%以下,满足降低安全风险的同时,可更充分地适应可再生能源发电不稳定的能源特性。Excessive hydrogen content in oxygen is easy to lead to safety risks during low-load operation of hydrogen production by renewable energy hydroelectrolysis,which is mainly attributed to lye intermixing after separation tank.In view of lye intermixing,the impact of gas partial pressure difference on both sides of the diaphragm and operating load on the index of hydrogen in oxygen accounting for more than 50%,improved measures to reduce the safety risk of hydrogen in oxygen were proposed.In the commonly used alkaline water electrolysis hydrogen production process,the addition of lye degassing tank and the adaptive capacity modification of the supplement pump can eliminate the influence of lye mixing on hydrogen in oxygen,and the hydrogen content in by-product oxygen can be achieved below 1%even when running at a low load of 10%,which can meet the safety risk reduction and more fully adapt to the unstable energy characteristics of renewable energy power generation.

关 键 词：可再生能源制氢 碱水电解 氧中氢 安全风险 脱气罐 

分 类 号：TQ116.2[化学工程—无机化工]