制管的

First, a chlorinator was self-designed in this paper, and dichloride of 2-methyl-1-propene was synthesized by 2-methyl-1-propene reacted with chlorine fast in this reactor. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the yield and selectivity of dichloride of 2-methyl-1-prop-ene were more than 65% and 80% respectively. Second, the preparation of 2-methylene-1, 3-propanediol, which dichloride of 2-methyl-1-propene reacted with alkali was investigated. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the conversion of dichloride of 2-methyl-1-propene was 100%. Moreover the preparation of MPO, which 2-methylene-1, 3-propanediol reacted with hydrogen, in presence of Al_2O_3-Pd catalyst, was gotten, and the product was appraised.

本文在氯化反应过程中，自行设计制作出了氯化管式反应器，在该反应器中异丁烯和氯气迅速混合反应生成二氯异丁烯，根据该氯化反应特征利用正交试验和单因素试验考察了有关因素的影响并优化得到了最佳工艺条件，二氯异丁烯的总收率达65％以上，选择性达80％；接着，对二氯异丁烯进行水解反应制得了2-甲烯-1，3-丙二醇，讨论了相关因素对水解反应的影响，并通过正交试验和单因素试验得到了较佳工艺条件，二氯异丁烯的转化率达100％；同时还对制备的2-甲烯-1，3-丙二醇在常压下采用三氧化二铝负载钯催化剂催化加氢得目的产物MPO，并对产品进行了鉴定，从而打通了整个工艺路线。

This thesis first research the effect of the additive and material, which can restrain ice crystal adhere onto the heat exchange surface. Then oriented at practical industrial application, a new kind of shell and tube type dynamic ice generator is designed.

本文对在蓄冰溶液中加入添加剂和换热表面改性这两种抑制冰晶在换热面上粘附的方法进行了研究，同时综述和比较了国内外各种形式动态制取冰浆的方法，并结合工业的实际应用，设计出了一种壳管式冰浆生成器，搭建了溶液动态制冰实验台，对冰晶在其管束换热面上粘附的过程进行了理论和实验研究。

Re-W alloy is oxidized and separated through air lancing reaction in a tubular oxidizing furnace with different temperature zones, and the Re oxide is heated and reduced in H2 atmosphere to obtain high purity Re powder.

将钨铼合金在具有不同温区的氧化气氛管式炉中进行吹扫反应，同时对不同区域温度、吹扫气体流量、反应系统出口气流量进行集中控制，以便在合适的气氛与温度下使钨铼合金充分氧化，并得到有效分离，最终对铼的氧化物在氢气氛中加热还原，制得高纯铼粉。

Molded siphons have a one-piece trap and bell with no glue joints, and are dimensionally consistent.

模制的虹吸管有一个一体化的弯管和钟罩，没有任何胶接处，整个产品在尺寸上是均匀一致的。

In this paper, the basic principle of the conventional slip energy recovery induction motor drive is discussed. Two kinds of slip energy recovery induction motor driving systems with high factors are discussed, and the performance analysis of these methods is compared. On the basis of above, a new type of three-phase and four-line slip energy recovering drive is proposed.

本文首先从普通串调原理入手，简要分析了影响串调系统功率因数的主要因素；在对三相四线双晶闸管串级调速、新型GTO串级调速等几种高功率方案进行分析与比较的基础上，提出了一种新型三相四线制双IGBT串级调速控制方案。

Delikang oxygen dose applied to a variety of similar products, the product output of the oxygen in line with the "People's Republic of China Pharmacopoeia" on the standard Medical Oxygen purity 99.5%,, and through the State Drug Administration inspected the award of the ODCCP armed quasi-established, enterprise production licenses.

得力康制氧剂适用于各种同类产品，该产品产出的氧符合《中华人民共和国药典》关于医用氧的标准纯度99.5%，，并通过国家药检局检验合格，颁发了药管械准字号，企业生产许可证。

The reaction conditions of methanol dehydrogenation to water-free formaldehyde was studied in a 16mm diameter fixed bed ceramic tube reactor,using Na_2CO_3 as catalyst,which was prepared by different ways.

在一个内径为16mm的固定床陶瓷管反应器中，研究了用不同方法制备的碳酸钠催化剂催化甲醇脱氢制无水甲醛反应的工艺条件。

Product sub-pipe, plate, easy to install, security, environmental protection, in the scope of use as applied to HVAC systems regardless of wind pipes, refrigeration and heating equipment, hot water piping and process piping cold insulation, vapor density to ensure the whole system sex.

产品分管材、板材，易于安装，安全环保，在使用范围内适用于暖通系统中的不管和风管，制冷和制热设备，热水管道及工艺管路的保冷保温，保证整个系统的汽密性。

After dryness, silica powder is put into chlorinated furnace in fluid bed and reacts with dried hydrogen chloride gas in the environment of 340℃ to form crude trichlorosilane. The crude trichlorosilane , through hydroscrubber and pipe bundle condenser to extract silicon tetrachloride in distillation column produces trichlorosilane gas out of the d istillation column , which can be made into the finished product of trichlorosilane by condensation .

硅粉经干燥后加入氯化沸腾炉，与通入炉中的干燥氯化氢气体在340o C进行反应，生成的粗三氯氢硅经湿法除尘器、列管冷凝器去蒸馏塔分离匹氯化硅，由蒸馏塔出来的三氯氢硅气体经冷凝，制得三氯氢硅成品。

In the domestic vitriol industry, tube-crust anode protection cooler of oil of vitriol is widely used.

在国内硫酸生产行业中，阳极保护管壳式浓硫酸冷却器应用广泛，它是硫酸生产工艺中用在吸收塔循环酸系统对浓硫酸进行换热的设备，其能否正常运行是冶炼烟气制酸系统正常生产的基本前提之一。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。