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首页> 美国政府科技报告 >Engineer, Design, Construct, Test, and Evaluate a Pressurized Fluidized Bed Pilot Plant Using High Sulfur Coal for Production of Electric Power. Phase I. Preliminary Engineering Technology Support Final Report; Turbine Materials Hot Corrosion; Erosion Rig Evaluation; Test Period July 1976--April 1977. Draft
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Engineer, Design, Construct, Test, and Evaluate a Pressurized Fluidized Bed Pilot Plant Using High Sulfur Coal for Production of Electric Power. Phase I. Preliminary Engineering Technology Support Final Report; Turbine Materials Hot Corrosion; Erosion Rig Evaluation; Test Period July 1976--April 1977. Draft

机译：工程师，设计，建造，测试和评估使用高硫煤生产电力的加压流化床试验工厂。第一阶段初步工程技术支持最终报告;涡轮机材料热腐蚀;侵蚀钻机评估;试验期间1976年7月 - 1977年4月。草案

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The combustion products exiting from the fluidized-bed coal combustor may contain particles of fly ash, char, mineral matter, dolomite and sulfated lime, as well as vaporized sodium, potassium sulfates and chlorides and alkali-metal salts. The fly ash is expected to be soft and friable because of the low combustion temperatures in the bed. The other particulates however, can conceivably be of such a nature as to result in turbine blade and vane erosion. Alkali-metal salts are known to cause accelerated attack on turbine components through a process generally known as hot-corrosion or sulfidation. A combined alkali-metal content in the raw gas stream exiting the fluid-bed vessel will probably be in excess of 1 ppM and possibly as high as 10 ppM. Marine gas turbine experience indicates that this level is sufficiently high to promote turbine hot corrosion. A program was carried out to evaluate the corrosion-erosion resistance of a number of turbine alloys and coatings for potential application in a coal burning pressurized-fluidized bed-turbine power generating system. The test program has resulted in a better understanding of the effects that a combined corrosion/erosion environment can have on turbine alloys and coatings. The test results have indicated the beneficial effects of utilizing aluminide diffusion and overlay coatings on turbine hardware operating in a corrosion/erosion environment. Because of the accelerated nature of the tests conducted, the data does not permit life predictions to be made for the turbine components operating in a PFB gas stream. However, the results indicate the relative resistance of various nickel base alloys, cobalt base alloys, iron base alloys, and coatings to an aggressive corrosion/erosion environment. (ERA citation 03:047337)

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