除氧

The reason of the fault was found by comparing the two performance indexes. Deaerator in Qinshan Ⅲ nuclear pow...

利用该方法对秦山三期核电站除氧器系统的运行数据进行分析，确定了除氧器自身的特性改变是引起凝结水流量异常的原因。

The dissertation firstly studies the deoxidizing mechanism of the deaerator and sets up a mathematic model based on conservation of mass and conservation of energy.

为改善除氧系统所存在的鲁棒性差等缺点，提高系统的稳定性，本文对智能控制技术及其在除氧系统中的应用及相关技术进行了研究。

This paper briefly introduces the structure of a new "small type""high efficiency"deaerator. The heat transfer calculation for the deaerator was done.

简要介绍了一种新研制的小型高效除氧器的结构，对该除氧器进行了传热计算。

The deoxidization process controls the pressure and water level in the deaerator.

除氧控制实质为除氧器内压力和水位的控制。

This paper analyses conventional control systems of deaerator's and condenser's level s, and furthermore points out the system drawbacks which cause these control systems difficult to be put in automation.

对国内125MW和200MW火电机组除氧器和凝汽器水位控制系统进行分析，指出了难于投入的原因。并采用模糊控制技术对除氧器和凝汽器水位进行多变量控制，仿真结果表明本文所提出的模糊控制方法是十分有效的

The reason of the fault was found by comparing the two performance indexes. Deaerator in Qinshan III nuclear power plant is considered. System change is responsible for the abnormal rising of feedwater's rate of flow.

利用该方法对秦山三期核电站除氧器系统的运行数据进行分析，确定了除氧器自身的特性改变是引起凝结水流量异常的原因。

A new type of active iron deoxidant is introduced which is of little harm,of high effectiveness,and stable in property and can be used in normal temperature.

为此，研制了新型的高效活性铁除氧剂，可在常温操作，物理性能优良，有害元素含量极低，是应用于水处理系统的优质除氧剂

New type of water chemistry for utility drum boiler and its principle and characteristic Two kinds of water chemistry's main principle and characteristic are detailedly analyzed. Against the problem of high eroding speed, high Fe content in feed water and boiler water, high scaling speed, short chemical cleaning interval, needing poisonous chemical deoxidant, etc for drum boiler's deoxidization water chemistry and difficulty of using oxidation water chemistry, a new type of water chemistry is put forward on the basis of analyzing the characteristic of whole power station's water steam cycle system, principle of two kinds of water chemistry and their practical effect in every cycle stage. Considering two water chemistry's merit, a new water chemistry called Limited Oxidation Water Chemistry is put forward, which is a local slight oxidization no-deoxidant water chemistry. And the proposed method's principle, control parameter, applying condition, start-lay up and emergency measures are initially calculated and analyzed.

三、新型汽包炉水化学工况的提出及其原理和特点详细分析了国内外现行两大类水化学工况处理的核心原理和特点，针对现行汽包炉还原性水化学工况处理所存在的系统腐蚀速度相对较大、给水和炉水铁浓度高、锅炉结垢速度快、机组酸洗间隔短、无法避免有毒化学除氧剂的使用以及氧化性水化学工况在汽包炉机组上应用的困难等问题，在详细分析电站整个水蒸汽循环系统的特点、两类水工况处理的原理和对循环中各段处理的实际效果等的基础上，综合两者的优点，提出了一种新型的局部轻微氧化性无除氧剂汽包炉水化学工况－"汽包炉有限氧化性水化学工况"处理原理，并初步计算、分析和确定了该种新型水化学工况的主要工艺控制参数、应用条件、启停与紧急情况处理等。

The effect of concentration of Co(NO3)2,concentr ation of Ca++、Mg++ and pH value on the deoxidation rate of Na2SO 3 were studied respectively.

研究了Na2SO3的除氧效果，讨论了pH值、Ca和Mg 离子浓度、催化剂Co(NO3)2的浓度对Na2SO3除氧效果的影响。

Many condensers can fully deoxidize with the high load but has bad deoxidization performance with the low load.

许多凝汽器在高负荷下能充分地除氧，但在低负荷下除氧效果不良。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。