共查询到19条相似文献,搜索用时 78 毫秒
1.
2.
湿法脱硫后的烟气含水量大,湿度高,烟气各项性能指标发生了变化,致使烟气具有强腐蚀性,从而带来了老烟囱如何防腐的问题。目前国内还缺乏老烟囱防腐改造经验,主要借鉴国外技术和经验。对玻璃鳞片胶泥衬里防腐、进口砖板衬里防腐、整体面层防腐3种方案进行了比较,结果表明:整体面层体系是老烟囱防腐改造较理想的措施。 相似文献
3.
4.
泡沫玻璃砖在烟囱防腐中的应用 总被引:1,自引:0,他引:1
火电厂燃煤烟气中存在一定量的SO3,会显著降低烟气的酸露点。由于湿法脱硫后烟温低于酸露点,烟气中的SO3与水蒸汽形成的硫酸蒸汽会凝结下来,造成混凝土烟囱的低温腐蚀。以2×135MW机组烟气脱硫技改工程湿烟囱防腐为例,详细介绍了烟囱内衬泡沫玻璃砖防腐的施工工序、技术要求及注意事项。 相似文献
5.
讨论了火电厂多种烟气脱硫技术装置的腐蚀处理,工艺环境对腐蚀的影响及其防腐蚀对策,分析我国引进及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,并着重论述了鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
6.
讨论火电厂多种烟气脱硫技术装置的腐蚀机理,工艺环境对腐蚀的影响及其防腐蚀对策。分析我国引进及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,并着重论述了鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
7.
湿法烟气脱硫吸收塔系统的设计和运行分析 总被引:16,自引:0,他引:16
详细介绍了广东省连州电厂石灰石/石膏湿法烟气脱硫吸收塔系统的流程,设备,吸收塔内部结构、防腐措施等设计情况,同时对系统的运行状况进行了分析。 相似文献
8.
火电厂烟气脱硫装置腐蚀与防护 总被引:10,自引:2,他引:10
讨论火电厂多种烟气脱硫技术装置的腐蚀机理,工艺环境对腐蚀的影响及其防腐蚀对策。分析我国引起及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,关着重讨论鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
9.
详细介绍了广东省连州电厂石灰石/石膏湿法烟气脱硫(FGD)装置蒸汽再热器系统的流程,再热器结构,防腐措施等设计情况,同时对系统的运行状况进行了分析和讨论。 相似文献
10.
11.
12.
华能玉环电厂4X1000MW燃煤机组生产用水全部采用经“膜法”海水淡化技术处理的淡化海水,该淡水海水具有较强的腐蚀性,对电厂脱硫系统产生一定影响,探讨了淡化海水对脱硫系统的腐蚀及应对措施。 相似文献
13.
14.
15.
Sven Andersson Evalena W. Blomqvist Linda Bäfver Frida Jones Kent Davidsson Jan Froitzheim Martin Karlsson Erik Larsson Jesper Liske 《Waste management (New York, N.Y.)》2014,34(1):67-78
Sulfur recirculation is a new technology for reducing boiler corrosion and dioxin formation. It was demonstrated in full-scale tests at a Waste to Energy plant in Göteborg (Sweden) during nearly two months of operation. Sulfur was recirculated as sulfuric acid from the flue gas cleaning back to the boiler, thus creating a sulfur loop.The new technology was evaluated by extensive measurement campaigns during operation under normal conditions (reference case) and operation with sulfur recirculation. The chlorine content of both fly ash and boiler ash decreased and the sulfur content increased during the sulfur recirculation tests. The deposit growth and the particle concentration decreased with sulfur recirculation and the dioxin concentration (I-TEQ) of the flue gas was reduced by approximately 25%. Sulfuric acid dew point measurements showed that the sulfuric acid dosage did not lead to elevated SO3 concentrations, which may otherwise induce low temperature corrosion.In the sulfur recirculation corrosion probe exposures, the corrosion rate decreased for all tested materials (16Mo3, Sanicro 28 and Inconel 625) and material temperatures (450 °C and 525 °C) compared to the reference exposure. The corrosion rates were reduced by 60–90%. Sulfur recirculation prevented the formation of transition metal chlorides at the metal/oxide interface, formation of chromate and reduced the presence of zinc in the corrosion products. Furthermore, measured corrosion rates at 525 °C with sulfur recirculation in operation were similar or lower compared to those measured at 450 °C material temperature in reference conditions, which corresponds to normal operation at normal steam temperatures. This implies that sulfur recirculation allows for higher steam data and electricity production without increasing corrosion. 相似文献
16.
17.
叙述了扬州二电厂一期脱硫改造过程中烟囱配套的防腐方案,防腐材料选用过程,以及施工过程中的工艺要求,对电站现役机组进行湿法脱硫改造条件下烟囱的防腐技术方案选用和施工有一定的借鉴意义. 相似文献
18.