The Design Of FRP Stack For Coal Fired Power Plant

Along with the contemporary fast development of economy, the environment is worsening. Acid rain is recognized as one of the most serious global environment problems. The main cause of acid rain is the sulfur dioxide and sulfur trioxide which are emitted into the air by the coal-fired power plants. In our nation, the coal-fired power plants constitute a high proportion in the power industry. Therefore, it's very important to reducing the total quantity of sulfur dioxide. Nowadays, Flue Gas Desulphurization Technology is an effective way. But the products after desulfuration and the condensation of flue gas will corrupt the chimney to a great extent. So the traditional chimney was made of a special corrosion-proof steels or alloys. However, no matter considering antiseptic effect or economic benefit, this kind of material doesn't win an actual outcome.So far, taking both corrosion prevention and mechanical properties of material into consideration, FRP with its special property is one of the materials suitable for making chimney in coal-fired power plant. But for the development of FRP materials in our country started late, many designs of key structures drag for behind those abroad. Thus, this paper aims at expediting the structural designs of mounted FRP chimney. The main contributions of the paper are:1 Catering to the characteristics of FRP chimney, it does a strength check to the layer tay-up design and the width of hand interface.2 For FRP chimney, the junction of chimney affected by the inherent characteristics of the process of hand interface is often the weak link of pipeline. Deconcentric and misalignment are the most familiar disease in the process of connection on the spot. Their existence will break the continuity of the chimney structure, lead to stress concentration and reduce the load-carrying area of the interface. This paper uses FEM analysis soft-ANSYS to analyze the force of the interface and study the load capacity of the hand interface in the flaw of deconcentric and misalignment according to the analysis and design standard about FRP chimney. 3 About the design of FRP chimney's expansion joints, it calculates the horizontal and vertical displacement of the expansion joints between the two adjacent sections. And considering the horizontal and vertical displacement under the load of wind and temperature between the bottom and the top, we should ensure the horizontal displacement shorter than the opening width of the expansion joints. In the vertical direction, we should make sure there is a certain distance between the two adjacent sections when the FRP smokestack of chimney expands and two adjacent sections won't detach from each other when the FRP smokestack of chimney contracts.