浅谈火力发电厂烟囱钛—钢内筒建造的质量管理

通过介绍某火力发电厂烟囱钛—钢内筒的施工过程,从前期策划、过程控制和质量验收等方面探讨火力发电厂烟囱钛—钢内筒施工的全过程质量管理,重点阐述钛及钛—钢复合板焊接的施工质量管理,供同类型电厂参考。     

浅谈火力发电厂烟囱钛一钢内筒建造的质量管理

通过介绍某火力发电厂烟囱钛一钢内筒的施工过程,从前期策划、过程控制和质量验收等方面探讨火力发电厂烟囱钛-钢内筒施工的全过程质量管理,重点阐述钛及钛一钢复合板焊接的施工质量管理,供同类型电厂参考。     

大型火力发电厂烟囱结构选型

结合工程实例论述1000MW级火力发电厂烟气采用湿法脱硫,脱硫系统在不设置GGH装置条件下,烟囱内筒所受烟气腐蚀特性及烟囱设计选型要点.经过技术、经济比较后,推荐新建大型火力发电厂采用(悬挂式)耐酸钢内筒内涂耐热耐酸涂料的烟囱方案.     

电厂不设GGH的烟囱内衬防腐方案比较

结合工程实例,根据脱硫烟气的特点和腐蚀性,对不设GGH的烟囱防腐方案进行了探讨,并对各种方案的优缺点及性能作了对比分析,通过对比得出：钛钢复合板结构为最佳防腐方案。     

烟囱钛复合板钢内筒倒装施工装置应用

以华能丹东电厂2×350 MW机组烟囱防腐改造钢内筒安装工程,采用钢杆式液压提升倒装施工装置施工应用为例,论述了该施工装置应用的安全稳定可行性,以及过程中运行控制和要求。同时,阐述了该装置在烟囱钛复合板钢内筒倒装施工方面的细部做法。     

火力发电厂烟囱结构选型及防腐方案论述

燃煤火力发电厂大多采用湿法脱硫工艺,烟气具有较强腐蚀性,若处理不当将影响烟囱结构安全及电厂运行安全。本文描述了脱硫烟气对烟囱内衬的腐蚀特性,重点论述目前烟囱主要结构型式及防腐材料的特点,经过技术、经济比较,本着技术可靠、经济适用,使用寿命期内维修最少的原则,推荐采用双内筒、钢筋混凝土外筒套筒式烟囱,钛合金板钢复合板钢内筒方案。     

火电厂烟囱钢内筒的几种施工方法

目前国内火电厂烟囱钢内筒施工常采用液压顶升倒装法、气压顶升倒装法,卷扬机提升法和悬索液压提升法。４种方法分别适用不同工程的需要,施工技术人员可根据不同情况选用。     

钛-钢复合板在烟囱钢内筒中的应用

阐述了钛-钢复合板首次在烟囱钢内筒上的应用过程，特别是对复合板的材料、焊接、检验、保护进行了详细的介绍，通过精心施工，使钛-钢复合板制作质量得到保障。     

大型火电厂悬挂式钢内筒烟囱设计研究

目前,大型火力发电厂常采用自立式钢内筒烟囱,由于自立式钢内筒筒壁竖向受压的承载特征,导致壁厚较大,耗钢量多,工程造价居高不下。基于此,文章提出了钢内筒与水平烟道连接部分采用自立式,其它部分采用隔节分段悬挂的优化方案,给出了内筒结构、膨胀节、悬挂点和钢平台等关键内容的设计计算方法和节点构造,并首次将此方案应用于某百万机组工程—天津北疆发电厂,较大程度上减少了钢材用量,取得了较好的经济效益。可供有关工程技术人员参考。     

关于硫磺回收装置中烟囱钢内筒的施工方法

硫磺回收装置尾气中含有硫化氢、二氧化硫、硫等腐蚀性物质,而且烟气温度在300℃以上,其烟囱钢内筒内壁会产生大量的酸性水,对其尾气烟囱的钢内筒有较大的腐蚀性,采用钛钢复合板做内筒是一种有效的防腐方法。但是钢板衬了钛板后对钢内筒的制作、焊接、安装提出了更高的要求。在普光气田天然气脱硫装置烟囱钢内筒的施工中,针对钛钢复合板烟囱内筒制订了详细的施工工艺,解决了高空组对、焊接作业量大、施工作业面狭窄的施工难题,取得了现场焊接量小、质量可靠、减少了高空作业并加快了施工进度效果。现将施工工艺和需要注意的问题做一介绍,为同类施工提供参考。     

火力发电厂建筑及结构探讨

结合自身工作经验,对大中型火力发电厂建(构)筑物的结构形式进行了分析,从经济技术角度进行方案对比优化,重点介绍了大中型火力发电厂主厂房、钢内筒烟囱的结构方案及施工做法等,以期指导实践。     

Assessment of water availability for wet cooling at potential locations for solar thermal power generation in India

ABSTRACT

This study presents the results of a preliminary attempt to assess water availability for wet-cooled solar thermal power plants at potential locations in India. A total of 95 locations with sufficient wastelands and annual average DNI more than 2000?kWh/m² have been considered for the analysis. Options of rainwater harvesting and groundwater extraction have been explored. It was observed that with rainwater harvesting, only 12 locations in different states are suitable for adoption of wet cooling. Further, with only groundwater extraction option, only one location in the state of Madhya Pradesh is found to be suitable for adoption of wet cooling. By combining both the approaches, it is observed that 28 of the 95 locations would have sufficient water available to meet the requirements of the plant. In the remaining 67 potential locations, the adoption of other available cooling options with relatively lesser water requirements may be appropriate.     

Controlling power output of solar chimney power plant according to demand

ABSTRACT

The solar chimney power plant (SCPP) is a simple solar thermal power plant that is capable of converting solar energy into thermal energy in the solar collector. In the second stage, the generated thermal energy is converted into kinetic energy in the chimney and ultimately into electric energy using a combination of a wind turbine and a generator. The numerical simulations were performed for the geometry of the prototype in Manzanares, Spain. Using computational ?uid dynamics (CFD) techniques; we have simulated a two-dimensional axisymmetric model of a SCPP with the RNG k-ε turbulence. In this model, the discrete ordinates (DO) radiation model was implemented to solve the radiative transfer equation, using a two-band radiation model. The main objective of this work is to explore dynamic control over plant power output. We have presented a technique to control the power output of the solar chimney power plant, in order to deliver power according to specified demand patterns. In order to present this, the reference plant model was modified to include a secondary and tertiary collector roof under the existing main collector. In terms of base load electricity generation, the inclusion of a secondary and tertiary collector roof produces good control over plant output.     

火电厂烟囱烟道进口区域钢内筒温度应力分析

以某火电厂悬挂式钢内筒为例,利用有限元分析软件ABAQUS对烟囱烟道进口区域钢内筒温度应力进行了分析,针对分析结果提出了在烟道进口区域钢内筒及烟道内侧设置陶瓷玻化砖对钢结构实施隔热防护,从而减小烟道进口区域钢内筒及烟道的温度应力,起到保护钢内筒的作用。     

火力发电厂供暖通风空调系统的现状及发展趋势

回顾了我国火力发电行业及供暖通风空调系统的发展历程,分析了火力发电厂供暖通风空调系统功能、特点,介绍了火力发电厂的全厂供暖、车间供暖、主厂房全面通风、电气设备间通风、集中空调系统、除尘系统现状。认为应不断采用新技术、新设备,选择适合当地条件的通风方式,采取粉尘综合治理措施,开展节能研究。     

钢筋混凝土烟囱裂缝机理的分析和防腐设计

结合工程实践，通过对以往工程单管式钢筋混凝土烟囱筒壁裂缝产生的机理分析，提出了提高烟囱耐久性的途径，指出这些措施已在实际工程中得到了应用，并取得了较好的效果。     

Performance analysis of sloped solar chimney power plants in the southwestern region of Iran

The sloped solar chimney power plant (SSCPP) has significant capability to fulfil a part of the forthcoming energy requirements of villages located in the southwestern region of Iran. This paper presents the performance analysis of SSCPP which was expected to fulfil the urgent need for electric power in the southwestern region of Iran. However, to investigate the SSCPP performance and power generation throughout the southwestern region of Iran, five different regions across the Persian Gulf were considered. A mathematical model was developed to estimate the power output of solar chimneys. The performances, such as rate of air mass flow, system efficiency and solar collector efficiency, of the SSCPP were studied. The obtained results show that SSCPPs can produce from 2.98 to 5.91?MW of electricity power in the selected regions during different months of the year.     

Thermodynamical analysis of dry cooling tower and solar chimney power plant combination

Solar chimney power plant is one of the rather new technologies that can produce power from solar energy. Its high stack is one of the important parts of the system in which the differential density of air among its top and bottom sections causes air-flow. Dry cooling towers are used in industries for cooling condensing water by utilising this concept and generating air-flow. The structural and conceptual similarity between these two systems cause the feasibility of their combination and usage of waste energy in industries. In this article, a simple and useful analytical thermodynamic model is improved in order to estimate the thermodynamic flow properties for combining both systems. Results show that the stack height and diameter are effective parameters in recovery of power. Moreover, the results show that the collector area does not remarkably affect the system performance.     

火力发电厂辅控系统DCS一体化设计

对辅助车间控制系统纳入全厂分散控制系统(DCS)进行了分析,并对某电厂全厂主、辅助车间控制系统的设计思路进行了阐述,指出全厂辅助车间控制系统采用了与主机相同硬件的分散控制系统(DCS),整个辅助车间集中控制系统采用模块化设计和分布式结构,适应了辅助车间控制设备分布广、独立性强等特点。     

浅谈火力发电厂的仪表自动化安装与故障分析

通过对火电厂热工仪表自动化的安装与运行的简单论述,进一步探究了现场热工仪表故障和测量参数仪表经常出现的故障,以期能为相关领域提供参考。