锅炉管

In order to analyze the influence of the center air pipe diameter change on the combustion effect, numerical modeling was applied to numerical calculation on the temperature field of such type of boiler,through which temperature field in five different schemes were obtained. In addition, the influence law of change of the diameter of the center air pipe on the temperature field was analyzed. The temperature of the nearly-back wall region takes on a firstly decreasing and then increasing change with the diametrical decrease of the central wind pipe.

为研究改变中心风管直径后的4层燃烧器对炉膛燃烧的影响，采用数值模拟的方法对该型锅炉炉内的温度场进行数值计算，得到5种不同方案下该型锅炉炉内的温度场分布，并分析了中心风管直径的改变对炉内温度场的影响规律，即后墙近壁区温度随着中心风管直径的减小呈现先降低后升高的趋势。

The macrographic investigation and the analyses on chemical composition, metallography and mechanical property at normal temperature of the damaged tube material of thermal recovery steam-injection boiler used for heavy oil recovery were carried out.

对稠油开采设备热采注汽锅炉破损炉管的材料进行了宏观检查、化学成分分析、金相分析、常温力学性能分析，并检测了给水水质，探讨了锅炉炉管在当前条件下的腐蚀机理。

The system can monitor on line operation state of the boiler system, including overall monitor of the boiler system, major monitor of boiler, run tending monitor, bar figure display and overrange alarm.

故障诊断根据锅炉运行状态监测情况，确定锅炉系统运行中出现的故障征兆，采用深、浅知识相结合的混合诊断推理机制，分析诊断锅炉系统在运行过程中可能出现的各种故障，如炉膛灭火，过热器爆管，省煤器磨损、泄漏，空气预热器积灰、泄漏，锅炉满水、缺水等常见故障。

One DHL water-fire tube boiler with angular tube structure has been introduced,which is a new type boiler improved from DZL water-fire tube boiler with upper or lower shell. It has characteristics of both DHL angular tube type water-tube hot water boiler and DZL water-fire tube hot water boiler.

介绍了一种采用角管结构的DHL型水火管热水锅炉结构特点，它是继DZL型上置锅壳的水火管锅炉和DZL型下置锅壳的水火管锅炉之后出现的一种新型水火管锅炉，它兼具DHL型角管结构水管热水锅炉和DZL型水火管热水锅炉的特点。

Through test and analysis, the influence of putting auxiliary air of the double inlet and double outlet coal pulverizer into operation upon ecomomic behavior of the boiler for 300 MW unit in one power plant has been obtained.

摘要通过试验分析了某电厂300MW机组锅炉所配双进双出钢球磨煤机辅助风投运对锅炉排烟温度的影响，结果表明，锅炉运行期间只要磨煤机一次风管不堵管，就无需投入磨煤机辅助风，辅助风仅在启动前和停磨煤机后吹扫管道时投入即可。

On the basis of NCIDI-designed fire-tube boilers and their operation,and through analysis and comparison, the paper proposes the suitable type of fire-tube boiler for large-size high-parameter sulfur-based sulfuric acid production,and summarizes key points for structural design of critical components.

由于硫磺制酸的炉气清洁无尘，比较适合采用火管锅炉，再加上火管锅炉结构简单、操作方便、运行可靠、运行费用低，特别是中小型火管锅炉的投资比水管锅炉省等优点，所以最近几年来火管锅炉在硫磺制酸上的应用有了长足的发展。

The 2×390MW HRSG in Xiamen Eastern Power Plant for combustion engine works adopts the HRSG manufactured by Hangzhou Boiler Group Co., Ltd., which is characterized by three-pressure, reheats, without after－combustion, horizontal type and natural circulation. Since the full set of HRSG designing technology from the US NOOTER/ERIKSEN has been introduced, it matches with PG9341FA type gas turbine, adopting single-row frame construction, full suspension type, and in-line arrangement in the heating surface. The heat conduction components use gear screw finned tube, module type supply and positive pressure operation.

厦门东部燃气电厂2×390MW燃机工程的余热锅炉采用由杭州锅炉厂生产的三压、再热、无补燃、卧式、自然循环燃机余热锅炉，引进美国NOOTER/ERIKSEN公司全套燃气轮机余热锅炉设计技术，它与PG9341FA型燃气轮机相匹配，采用单排框架结构，全悬吊形式，受热面顺列布置，传热元件采用开齿螺旋鳍片管，模块式供货，锅炉为正压运行。

Since the turbine-driven feedwater pump failed to regulate directly the drum level of single boiler and problems like pressure overrun of main feedwater pipe existed, DCS was utilized to solve the problems for its features of shared information, powerful configuration functions and easy modification.

在对国电成都热电厂嘉陵2×142MW机组两炉一机单元给水系统控制方式进行分析的基础上，针对运行中出现的汽动给水泵不能直接调节单台锅炉汽包水位及给水母管压力超限等问题，利用分散控制系统信息共享、组态功能强大、修改方便的特点，在不增加硬件设备的情况下，通过软件组态增加了汽动给水泵调节单台锅炉汽包水位调节回路和给水母管超压及欠压保护回路，实现了机组在一炉一机单元运行和两炉一机母管运行2种运行方式下给水自动的合理控制，并解决了给水母管的压力保护问题，提高了机组运行的安全可靠性。

April 1 from the traditional annual contract expiration date draws near, the increasingly heated in the iron ore price negotiations, the international iron ore prices and sea freight is expected to become stable against the backdrop of high-pressure boiler tubes in the industry, analysts expect March spot iron ore imports will reach 60 million tons, a record high.

距离4月1日传统的年度合同到期日越来越近，在铁矿石价格谈判日益白热化、国际铁矿石价格上涨和海运费有望趋于平稳的背景下，高压锅炉管业内分析人士预计，3月份铁矿石现货进口将达到6000万吨，创下新高。

Owing to advantages of this welded tube category such as high geometric accuracy,fine surface quality and costeffectiveness,application scope of these tubes is getting wider and wider.

由于这些钢管的尺寸精度高、表面质量好、生产成本低，其使用范围不断扩大。国外电焊锅炉管的质量已达到无缝钢管的等效水平。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。