A horizontal turbo air classifier was designed for classifying the FCC particles.Effects of the operational parameters (including the primary, secondary air volume flowrate and the rotor cage rotation speed) on particle classification were investigated.Then the powder particle cut size was calculated according to the fluid hydrodynamic theory under different experimental conditions.The above results suggest that the horizontal turbo air classifier can obtain good classification performance with Newton classifying efficiency of 82.4％ and classifying accuracy index of 1.54.The maximum relative error for the cut size between the theory calculation and experimental results is less than 4％, which indicates that the theoretical predicted cut size agrees well with the experimental data.Our research results can provide the fundamental support for the design and application of the horizontal turbo air classifier.

中国石化湛江东兴石油化工有限公司500万吨/年常减压车间,装置己进入第四生产周期后期.自2013年5月停开减压系统后,随着换热终温的大幅下降和燃料油消耗增加,常压炉炉管表面结垢情况逐渐加重,严重影响生产负荷,难以满足公司提出的保证产能和节能的需要.为了保证装置安全、平稳、正常的生产,在正常开工状态下使用清灰剂清除灰垢,使加热炉运行工况得到较大改善,提高装置处理能力,降低加热炉燃料消耗,为常减压蒸馏装置的安稳运行提供保障.

Due to the complexity of present FCC catalyst preparation process,catalyst post-treat-ment technology was explored. NaY zeolite,pseudo-boehmite,aluminum sol and kaolin were mixed and spray-dried into catalyst microsphere NaY35. The basic properties of the unmodified NaY35 were char-acterized by XRF,XRD,BET. The NaY35 catalyst was treated by once calcination and then once rare earth ion exchange. The treated NaY35 was used as a starting precursor. The precursor was then trea-ted by three times calcinations and three times ammonium ion exchanges at normal temperature (<90 ℃),and two times calcinations and two times ammonium ion exchanges at high temperature (>90 ℃),respectively to explore the optimized post-treatment conditions for FCC catalyst.The test re-sults indicate that the Na2 O contents in both prepared catalysts are less than 0.3%.

对分子筛孔道清理改性技术在水热超稳分子筛DASY2.0生产中的工业应用情况进行了总结,并用XRF法分析了应用孔道清理改性技术后所生产的DASY2.0工业产品的化学组成,采用XRD、DTA及BET等方法对产品的物化性能进行了系统表征,并和以前未采用孔道清理改性技术所生产的水热超稳分子筛DASY2.0的性能进行了分析对比。结果表明,与水热超稳分子筛孔道清理改性技术工业应用前相比,孔道清理改性技术工业应用后所生产的水热超稳分子筛DASY2.0工业产品的氧化钠含量明显降低,晶胞常数基本相当,结晶度明显提高,比表面积明显增大,热稳定性明显提高,酸量显著增多,裂化活性增强,孔道清理改性技术使得水热超稳分子筛DASY2.0的性能明显改善。

Based on the detailed analysis in the complex deep catalytic catalyst(DCC) reaction network,the development of oil refining at the molecular level and the optimized catalysis kinetics(OCK in brief),an innovative catalyst technology had been developed for enhancing the heavy oil deep-cracking ability and optimizing the availability of the active sites.With such a technology,DMMC-1 of a new catalyst generation had been designed and developed for the DCC process.Comparing with the best catalyst used in industry now,DMMC-1 had the features of macropore structure,higher surface area and higher activity.The laboratory evaluation test results showed that with DMMC-1 the propylene yield increased by 2.25 percent and the propylene selectivity increased by 13.8%.The catalyst of DMMC-1 had improved its ability for heavy oil cracking and coke selectivity along with reduction of olefin content in gasoline to achieve a better product distribution and improve the product quality.

对无铵交换技术在DM-4分子筛工业生产中的应用情况进行了总结,并对工业试验数据进行了分析对比,结果表明,用非铵盐交换介质代替铵盐介质进行DM-4分子筛生产,在保证产品质量的前提下实现无铵交换工艺,交换污水全部直接排放,缓解了企业氨氮处理装置压力,降低污水处理费用和生产成本,经济效益和社会效益显著。

The effects of crystallization temperature,crystallization time and heating time on the structure of MTT molecular sieve were investigated.The low hydrothermal stability of MTT was discussed to find its solution method,at the same time,catalytic performance of MTT was also evaluated.The results indicated that the suitable crystallization temperature was about 170℃,heating and crystallization times had great effect on the final product.Creation mechanism of impure crystal was different,ZSM-5 created with MTT at the nucleation period,while quartz phase was formed by the transition of MTT or secondary nucleation.Modification by P can effectively inhibit the dealuminum in the framework of molecular sieve.When the MTT molecular sieve was used as catalyst in catalytic cracking for low-carbon alkene production,high selectivity to propylene could be obtained.

Effect about size of particle on the catalytic property of nano perovskite complex oxides catalysts for reducing sulfur dioxide to elemental sulfur by carbon monoxide was studied.These catalysts were characterized by means of TPR,BET,TEM,XRD and XPS.The results showed that the effect of size of particle on the catalytic property was obvious.

对工业用水热超稳分子筛DASY 2.0进行酸处理改性.分别考察了酸浓度、酸处理时间及酸处理液温度等改性条件对DASY 2.0分子筛的结构的影响规律,重点考察了改性条件对分子筛中所含的总铝摩尔分数与骨架铝摩尔分数的影响规律及对分子筛的结晶度的影响.结果表明,酸浓度对分子筛的结构影响比较大,在较低的酸浓度下,延长处理时间或升高处理温度对分子筛的结构影响不大.

The surface-wetting method is a new method to synthesize zeolite β.It decreases the amount of template and has been applied in preparation of zeolite β.The results show that the pore structure and crystal size of zeolite was affected by silicon source with different pore and surface property.Silica gel with small surface area and large pore diameter can be used to synthesize zeolite β with small size.