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尿素水解法在超超临界机组脱硝系统中的应用与优化 被引量:9
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作者 谢增孝 王民军 朱继峰 《浙江电力》 2020年第3期88-93,共6页
尿素制氨技术是一种安全经济的SCR(选择性催化还原法)脱硝还原剂制备方法。介绍水解制氨法和热解制氨法这2种成熟制氨技术的工作原理,再根据技术和经济指标,比较二者的优缺点,最后选择水解制氨法作为舟山煤电SCR脱硝系统的尿素制氨工艺... 尿素制氨技术是一种安全经济的SCR(选择性催化还原法)脱硝还原剂制备方法。介绍水解制氨法和热解制氨法这2种成熟制氨技术的工作原理,再根据技术和经济指标,比较二者的优缺点,最后选择水解制氨法作为舟山煤电SCR脱硝系统的尿素制氨工艺,并从预防腐蚀、预防堵塞和提高供氨响应速度等方面进行水解制氨工艺的设计优化。对于投运后出现的堵塞、温度控制、阀门内漏和控制逻辑不合理等问题,分析形成原因并进行针对性处理。 展开更多
关键词 尿素 水解制氨法 热解 腐蚀 堵塞
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Amino Acids Production from Fish Proteins Hydrolysis in Subcritical Water 被引量:9
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作者 朱宪 朱超 +1 位作者 赵亮 程洪斌 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第3期456-460,共5页
The hydrolysis technology and reaction kinetics for amino acids production from fish proteins in subcritical water reactor without catalysts were investigated in a reactor with volume of 400 ml under the conditions of... The hydrolysis technology and reaction kinetics for amino acids production from fish proteins in subcritical water reactor without catalysts were investigated in a reactor with volume of 400 ml under the conditions of reaction temperature from 180-320℃, pressure from 5-26 MPa, and time from 5-60 rain. The quality and quantity of amino acids in hydrolysate were determined by bioLiquid chromatography, and 17 kinds of amino acids were obtained. For the important 8 amino acids, the experiments were conducted to examine the effects of reaction temperature, pressure and time on amino acids yield. The optimum conditions for high yield are obtained from the experimental results. It is found that the nitrogen and carbon dioxide atmosphere should be used for leucine, isoleucine and histidine production while the air atmosphere might be used for other amino acids. The reaction time of 30 rain and the experimental temperature of 220℃, 240℃ and 260℃ were adopted for reaction kinetic research. The total yield of amino acids versus reaction time have been examined experimentally. According to these experimental data and under the condition of water excess, the macroscopic reaction kinetic equation of fish proteins hydrolysis was obtained with the hydrolysis reaction order of 1.615 and the rate constants being 0.0017, 0.0045 and 0.0097 at 220℃, 240℃ and 260℃ respectively. The activation energy is 145.1 kJ·mol^- 1. 展开更多
关键词 BIOMASS subcritical water HYDROLYSIS reaction kinetics amino acids
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