国产P—500双级推料离心机替代进口的尝试

介绍了国产Ｐ－５００离心机在氯碱厂的试用以及根据工艺特点对其所作的改进，替代进口取得了显著的经济和社会效益。     

国产P—500／2双级推料离心机代替进口机的尝试

介绍了国产Ｐ－５００／２离心机在氯碱厂的试用以及根据工艺特点对其所作的改进，替代了进口，取得了显著的经济和社会效益。     

HR500－N离心机碱盐分离试验与应用

介绍了ＨＲ５００－Ｎ离心机工作原理，结构特点。介绍了该机用于碱盐分离试验的系统以及ＨＲ５００－Ｎ离心机碱盐分离的经济技术效果。     

关于P-60双级推料离心机在氯碱工业中的应用

比较了Ｐ－６０双级推料离心机及ＷＧ－１２００刮刀离心机的优缺点。着重介绍了Ｐ－６０双级推料离心机的结构、原理和安装、调试与运行中存在的问题及采取的措施。     

蒸发离心机及相关工艺的改进

我厂是以生产氢氧化钾（１６ｋｔ／ａ）和氧化乐果农药为主要产品的中型化工企业。为了适应市场需求,满足用户需要,我厂对蒸发工段离心机及相关工艺进行改进,降低了碱损和蒸汽消耗,从而减少氢氧化钾生产成本。１　改进前情况我厂蒸发采用二效三体顺流流程。改进前所用采盐装置是Ｐ－５００型双级推料离心机,该机具有连续进、出料;双级推板和内转鼓推料卸料;离心机基础块下装有１０个橡胶减振以及只有一个液体出料口等特点,但也存在易振动,操作弹性小;回收盐水含碱大,碱损失较大的缺点。由于离心机下液口为１个,因此离心机母液和…     

关于P—60以级推料离心机在氯碱工业中的应用

比较了Ｐ－６０双级推料离心机及ＷＧ－１２００刮刀离心机的优缺点。着重介绍了Ｏ－６０双级推料离心机的结构、原理和安装、调试与运行中存在的问题及采取的措施。     

几种离心机在氯碱和PVC生产中的应用比较

通过对本厂使用的四种型号离心机在分离因素、特性参数、产品工艺指标及经济性等方面的分析比较,得出离心分离的Ｚ６Ｅ－２型离心机和离心过滤的ＨＲ５００－Ｎ型离心机在分离因素、结构形式、工艺特性和维修保养等方面都有较大的优越性,建议在本厂的离心分离设备中加以推广,亦可为氯碱、聚氯乙烯行业生产中离心分离设备的优选设备。     

离心机和旋液分离器

离心机和旋液分离器合肥通用机械研究所程传庆，许振英译章棣校ＺｅｎｔｒｉｆｕｇｅｎｕｎｄＨｙｄｒｏｚｙｋｌｏｎｅ（续上期）对于最新结构的转直径３５０ｍｍ（λ＝３．５）、５００ｍｉｎ￣－１的螺旋卸料沉降离心机ＳＣＩ－２Ｈ、ＫＨＤ公司在将分离因数提高到５０...     

LW—380B型沉降离心机在PVDC树脂生产中的应用及改进

对ＬＷ－３８０Ｂ型沉降离心机应用于ＰＶＤＣ树脂脱水的使用情况、所遇到的问题以及对离心机的改进情况进行了介绍。     

HR—500AN双级活塞推料离心机的改进及分离重碱生产试验浅析

经过大量的研究和努力，设计制造出了ＨＲ－５００ＡＮ双级活塞推料离心机，用于重质纯碱的分离，取得了较好的效果，同时，也指出了生产试验中的问题及解决办法。     

WL—450离心机在PVC生产中的应用

本文对四川江北机械厂生产的WL—450离心机在替代进口离心机用于PVC固液分离的情况作了小结，具有一定的推广使用价值。     

乳癖消贴片中标示成分及残留溶剂的含量测定

建立了贴片中标示成分芍药苷含量的HPLC分析方法和贴片中各种残留溶剂含量的GC分析方法。样品经甲醇提取,离心分离后,以乙腈-水（体积比16：84,HAc0．4％）为流动相,选择ODS-2Hypersil C18（4．6mm×150mm,5μm）色谱柱,测定芍药苷含量。贴片基质经处理,以GC内标法测定残留溶剂含量。结果表明HPLC法的精密度、重现性和回收率良好;GC分析测得乙酸乙酯、异丙醇、乙醇三种残留溶剂,贴片中残留溶剂总量为2．1×10^-4。     

Photocatalytic degradation of imazapyr in water: Comparison of activities of different supported and unsupported TiO2-based catalysts

Photocatalytic oxidation in aqueous phase of imazapyr, a systemic herbicide characterized by its high persistence and mobility in soils, has been investigated using two different titania photocatalysts: commercial Degussa P-25 and industrial Millennium PC-500. Despite potentially better textural and crystalline properties of PC-500, its photocatalytic activity is smaller than that of P-25 for that reaction. A less efficiency of PC-500 powders absorbing the irradiated photons, as well as a low substrate adsorption capacity, has been attributed as the main responsible for such behaviour. Variables such as concentration of imazapyr, amount of catalyst and the physical state of TiO₂ (as a powder or deposited on an Ahlstrom paper) have been studied to elucidate their influence on the efficiency of the photocatalyzed degradation of imazapyr. It has been determined that both adsorption capacities of the catalyst and the reaction rates are strongly affected by the above mentioned parameters. They are even able to modify both the mechanism and kinetic order of the process, by affecting the interfacial substrate–TiO₂ interactions.     

离心机转鼓开孔应力计算方法与比较

本文介绍了离心机转鼓开孔应力的计算方法，分析和讨论了各种计算方法的适用范围     

巴工业TRH084离心机在PVC行业的应用

分析了日本巴工业TRH离心机在PVC行业的应用成果,实现了PVC企业生产的大型化和高效化发展,提高装置的生产效率和可靠性,实现了节能降耗和清洁生产。     

卧螺离心机在酒糟废液分离中的应用

我国酿酒行业每年要排出几千万吨高浓度酒糟废液。酒糟废液中的有机固形物含量高达5％-8％，每吨酒糟废液中残留有机物含量高达500kg以上，并含有丰富的营养成份和多种氨基酸。近20年来，国内酒精行业为选择酒糟废液分离设备进行过多种尝试，大型板框压滤机存在滤布再生困难，操作劳动强度大，常规作业费用高等问题；过滤式离心机存在物料易堵塞过滤介质，处理量小不能满足生产需要以及常规操作费用高等问题。因此，我们选用不同规格的卧式螺旋卸料沉降离心机用于酒糟废液分离，取得了良好的工程应用效果。     

复分解法生产硝酸钾技术存在的问题与建议

用硝酸铵和氯化钾采用复分解循环法生产硝酸钾和氯化铵工艺是目前我国生产硝酸钾的主要方法。指出该生产技术存在硝酸钾结晶率低、冷却结晶效果差、氯化铵结垢严重、蒸汽能耗高、离心机选型不当等问题,分析了问题产生的原因,提出了相应的改进措施和合理化建议。     

高强超薄薄膜料7000 F长周期生产探索

从工艺、设备等方面对生产高密度聚乙烯产品7000F的难点进行了统计分析，主要存在质量不稳定、低聚物量大、易堵塞工艺管线、离心机故障率高、己烷汽提塔系统易堵塞、造粒困难等问题，并对此提出了相应对策。通过技术改造、优化工艺参数等手段，使7000F生产周期在1个月以上，基本达到了长周期稳定生产的目的。     

低阶煤低温干馏炉中低温燃烧室温度场分布模拟及结构优化

用CFD Fluent 6.3软件对自主研发的与增收低温焦油炭化室相配套的褐煤热解旋流式低温燃烧室（1500 mm×200 mm×1500 mm）内温度场分布进行了模拟研究和结构优化,结果表明：在燃烧室内坐标为（?25,550,0）和（25,?550,0）处设计两个关于燃烧室中央轴对称半径为100 mm的130°圆弧形挡板,燃烧室内平均温度（755 ℃）满足褐煤低温热解需求（500～650 ℃）;Realizable k-ε湍流模型、P-1辐射模型和非预混燃烧模型适用于计算焦炉煤气和空气低温燃烧室内温度场分布,模拟计算结果与实验结果基本吻合,误差波动幅度为50～70 ℃,满足工业要求。     

TiO2 photocatalytic films on stainless steel: The role of Degussa P-25 in modified sol–gel methods

The role of Degussa P-25 loading (0–100 g/L) in the alkoxide sol was investigated for the synthesis of immobilized TiO₂ photocatalytic films on 304 stainless steel using the P-25 powder-modified sol–gel method (PPMSGM). The structural properties of the films (PPMSGFs) obtained after gel drying and calcination at 600 °C were examined using different materials characterization techniques including X-day diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of films with good adherence to the stainless steel support were evaluated using 4-chlorobenzoic acid (4-CBA) as a model organic contaminant and UV-A radiation. The P-25 loading did not have a significant effect on the size of the crystallites in the films. However, increasing the P-25 loading in the sol resulted in an increase in (i) the amount of crystalline material retained on the support (i.e., for both anatase (1 0 1) and rutile (1 1 0) crystal phases); (ii) the number of grains (aggregates of P-25 particles and crystallites formed from the alkoxide sol); (iii) the number of pores in the film (in the range of 0–50 g/L); and (iv) the number of microcracks on the surface of PPMSGFs. On the other hand, increasing the P-25 loading in the sol resulted in a decrease in the size of grains on the surface of PPMSGFs. XPS analysis revealed the presence of Cr³⁺, Mn³⁺ and Fe³⁺ on the surface of PPMSGFs as a result of diffusion of these species from the stainless steel support during film calcination at 600 °C. The concentration of these foreign species on the film surface decreased with an increase in the P-25 loading in the sol. Increasing P-25 loading in the sol yielded films with higher photocatalytic activity but a concentration of 50 g/L P-25 in the sol was found as the maximum for obtaining films with good adherence on the stainless steel support. Increase in the photocatalytic activity of the films with increasing P-25 loading in the sol was mainly attributed to the enhancement of the number of P-25 active sites exposed to the solution due to film morphology and surface characteristics and to the reduction in Cr³⁺ and Fe³⁺ concentrations on the surface of the films.