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一体化两段初蒸发器在加压硝铵工艺中的应用
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作者 王志鸿 邹永明 +1 位作者 叶天伦 罗庆 《煤化工》 CAS 2017年第4期18-20,29,共4页
介绍了加压硝铵工艺中,硝铵溶液的蒸发浓缩和氨氮污水的产生过程,针对反应热蒸汽不能完全回收利用,补充新鲜蒸汽冷凝为氨氮废水的问题,云南解化清洁能源开发有限公司主持开发了降膜式一体化两段初蒸发器,并应用到加压硝铵生产工艺中,可... 介绍了加压硝铵工艺中,硝铵溶液的蒸发浓缩和氨氮污水的产生过程,针对反应热蒸汽不能完全回收利用,补充新鲜蒸汽冷凝为氨氮废水的问题,云南解化清洁能源开发有限公司主持开发了降膜式一体化两段初蒸发器,并应用到加压硝铵生产工艺中,可从源头实现清污分离,获得了较好的节能减排效果,每年节约低压蒸汽5万t,减排氨氮污水6.4×104m^3。 展开更多
关键词 一体化蒸发器 硝铵 反应热蒸汽 降膜蒸发器 氨氮废水
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Oxidation behaviors of wrought nickel-based superalloys in various high temperature environments 被引量:9
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作者 Changheui JANG Daejong KIM +3 位作者 Donghoon KIM Injin SAH Woo-Seog RYU Young-sung YOO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1524-1531,共8页
Oxidation characteristics of Alloy 617 and Haynes 230 at 900 oC in simulated helium environment,hot steam environment containing H2 as well as in air and pure helium conditions were investigated.Compared to air condit... Oxidation characteristics of Alloy 617 and Haynes 230 at 900 oC in simulated helium environment,hot steam environment containing H2 as well as in air and pure helium conditions were investigated.Compared to air condition,the oxidation rate of Alloy 617 was not significantly affected in helium and hot steam environments,while Haynes 230 showed lower oxidation rate in helium environment.On the other hand,the oxide morphology and structure of Alloy 617 were strongly affected by the environments,but those of Haynes 230 were less dependent on the environments.For Haynes 230,a Cr2O3 inner layer and a protective MnCr2O4 outer layer were formed in all environments,which contributed to the better oxidation resistance.As the mechanical properties,such as creep and tensile properties,were significantly affected by the oxidation behaviors,surface treatment methods to enhance oxidation resistance of these alloys should be developed. 展开更多
关键词 oxidation nickel-based superalloys very high temperature reactor (VHTR) impure helium hot steam
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Effects of Reservoir Minerals and Chemical Agents on Aquathermolysis of Heavy Oil during Steam Injection 被引量:5
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作者 Zhang Xian Liu Yongjian +1 位作者 Fan Yingcai Che Hongchang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第3期25-31,共7页
In order to effectively reduce the viscosity of heavy oil during steam injection, a catalyst system, consisting of reservoir minerals, nickel sulfate, and formic acid, was used to exert catalytic effect on aquathermol... In order to effectively reduce the viscosity of heavy oil during steam injection, a catalyst system, consisting of reservoir minerals, nickel sulfate, and formic acid, was used to exert catalytic effect on aquathermolysis of heavy crude oil extracted from the Liaohe oilfield. Experimental results indicated that all the reservoir minerals used in the experiment had catalytic effect on aquathermolysis and the oil viscosity reduction rate ranged from 24% to 36% after the aquathermolysis reaction. If nickel sulfate was used as the catalyst and added to the reaction system, the oil viscosity reduction rate could reach 50%. If formic acid was used as the hydrogen donor, the oil viscosity reduction rate could increase further, and could reach up to 71.8%. The aquathermolysis reaction of heavy oil under steam injection condition was affected by the reaction temperature, the reaction time, the dosage of minerals, the catalyst concentration, and the hydrogen donor. The experimental results showed that minerals, catalyst and hydrogen donor could work together to enhance aquathermolysis reaction of heavy oil in the presence of the high-temperature water vapor. 展开更多
关键词 heavy oil AQUATHERMOLYSIS CATALYSIS viscosity reduction
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