intermediate pressure engine

With the example of one medium pressure piping in a chemical plant and the safety evaluation of the existed flaw discovered in the inspection, in this paper, the inspection aspects and safety evaluation method used to medium pressure piping were presented.

本文以某化工厂一中压蒸汽管道的检验为例 ,并结合检验中发现超标缺陷的安全评定 ,提出了中压蒸汽管道的检验内容和安全评价方

The principle,action and control process of permanent magnet driven machinery were introduced,its characteristic was analyzed,and its application to medium pressure vacuum circuit breaker was expounded.

介绍了永磁操动机构的原理、动作和控制过程,分析了永磁操动机构的特性,阐述了其在中压真空断路器上的应用。

The process scheme and main features of the 1 million tpy mid-pressure hydro-upgrading unit with single stage and two catalysts in series in the Refinery of Yanshan Petrochemical Company were introduced together with feedstock, products, operating conditions and material balance as well as major equipment of the unit and others.

０ Ｍｔ／ａ中压加氢改质装置的流程和主要特点，原料、产品、操作条件和物料平衡，以及装置的主要设备等。

Technical progresses in mid-pressure hydrocracking, residual oil ebullated-bed hydrocracking and moving bed hydrocracking were also introduced.

回顾了1959年世界上首套加氢裂化装置投产以来馏分油加氢裂化催化剂、工艺技术及设备的重大变化,介绍了中压加氢裂化,渣油沸腾床和移动床加氢技术方面的进展,认为今后10年加氢裂化技术仍会有较大的发展。

In this paper,we list corroding phenomenon in production installation of nitric acid in middle pressure, research it's principle and give some way to resolve it following corresponding theory and linking the practical experience of chemical industry where are production installation of nitric acid in middle pressure.

列举了中压法生产硝酸装置中存在的设备腐蚀和管道腐蚀等现象 ,研究其腐蚀机理 ,并且从相应的理论出发 ,结合多家企业生产硝酸的实际经验 ,就文中涉及到的几处腐蚀问题提出了处理方

(1)High pressure hydrocracking directly producing the III series clean diesel using vacuum gas oil as the feedstock and the middle pressure hydrocracking directly producing the II series standard clean diesel.

介绍了抚顺石油化工研究院开发的几种可直接生产符合《世界燃料规范》II类、Ⅲ类标准清洁柴油的加氢技术 :①以减压瓦斯油为原料直接生产Ⅲ类标准清洁柴油的高压加氢裂化技术 ,以及直接生产Ⅱ类标准清洁柴油的中压加氢裂化技术 ;②直馏柴油、焦化柴油深度加氢精制技术 ;③正在开发中的采用贵金属催化剂的催化裂化柴油两段法深度脱硫、脱芳烃加氢技术。

Pros and cons as well as the effect of upgrading inferior FCC gas oils by caustic treating, hydrotreating, middle pressure hydro-upgrading and solvent refining etc.

分析了采用碱精制、加氢精制、中压加氢改质和溶剂精制等技术对催化裂化劣质柴油改质的利弊及其效果。

Simulation and modeling of medium voltage power line channels;

中压电力线信道的仿真与建模

The technical features of medium voltage high power inverter and the basic structure of its electric circuits are analyzed.

本文对中压大功率电动机变频调速的技术特点和电路结构进行了分析 ,阐述了多电平变频器的工作原理。

This article relates to the results and recent trends of the medium voltage vacuum circuit breaker is the technical progress.

真空断路器与SF_6断路器近年来各自均得到长足的发展,而真空断路器在中压断路器市场需要量已逐年超过SF_6断路器,尤以12kV真空断路器占有绝对优势。

Control system of mid-voltage soft starter based on DSP;

基于DSP的中压软启动器控制系统

This paper develops a practicable method for mid-voltage power system planning.

本文提出一种实用的中压配电网络规划方法。

But our country imported all the mid-voltage soft-starter before.

而对于中压(如6kV、10kV)系列,由于技术层面的原因,以前则是全部依赖进口。