循环流化床锅炉J阀工作特性试验研究

J型回料阀是循环流化床锅炉(CFB)常采用的一种回料装置,其工作特性对锅炉正常运行十分重要。提出一种通过测量CFB锅炉内关键部位压力差如立管差压、风室差压、炉膛差压等来分析和判断J阀工作特性的方法,并在冷态CFB试验台上进行了试验。试验结果表明,测量炉内关键部位压力差的变化可以了解J阀的工作特性,对解决CFB锅炉运行中常出现的J阀堵塞、震动等问题提供了针对性的方法和措施。

TEST STUDY ON WORKING BEHAVIOR OF J -TYPE VALVE USED FOR CFB BOILER

The J-type valve is a kind of facility used frequently to return materials into risers in CFB boilers,its working behavior is very important for ensuring normal operation of the CFB boiler.A method for analysing and evaluating the working behavior of J-type valve based on pressure difference on key parts in the CFB boiler,such as the pressure difference of material layer in the riser,the pressure difference between air quantity in returned material and the main air compartment,and the pressure difference of material layer in the furnace etc.,has been put forward,and the said method being tested on the cold-state test stand.Results of test show that the measurement of pressure difference variation on key location in the furnace is helpful to undestand the working behavier of the J-type valve,providing method and measure for solving the problems,i.e.blockage and vibration of J-type valve,occurred frequently in operation of CFB boilers.