Precision
flat steel bar finishing equipment is one of the key equipments used in the manufacture of membrane water-cooled walls for boilers. It is used for size finishing, leveling and straightening of annealed flat steel raw materials to meet the pre-weld requirements in size and shape. The membrane type water wall structure boiler has the advantages of high heat transfer efficiency, good sealing performance, light weight of the furnace wall, energy saving and small pollution. With the continuous improvement of boiler performance and environmental protection requirements, the application of membrane water wall has become increasingly widespread. Membrane water wall production technology includes precision flat steel bar production technology, pre-weld pretreatment technology and membrane water wall welding production technology. One of the keys to ensuring the quality of the membrane water wall manufacturing is to ensure the pitch accuracy between the membrane water wall tubes. Under the premise that the pitch of the membrane type water-cooled wall steel pipe is fixed, the gap between the flat steel bar and the steel pipe must be adjusted by the change of the width dimension of the flat steel. In addition, the effect of weld shrinkage on the pipe pitch after welding of the membrane type water wall is also compensated by adjusting the size of the flat steel bar. It can be seen that the flat rolling and size finishing technology of flat steel is an important process link in the manufacture of membrane water wall manufacturing.
Combined with the production process of precision flat steel, after comprehensive analysis, we propose the overall design of the production line as follows.