Several uses of square finned tube industry
The H type fin tube with two fins is rectangular, approximately square, its length is about 2 times of light pipe. Extended heated surface. H type boiler smoke design of fin tube economizer of boiler economizer technology in our country early production speed mostly in more than 9m/s, in the power plant fuel used in low calorific value, high ash, plus many boiler economizer structure defects, which exist in the operation, exhaust temperature is too high, economizer wear and clogging and serious ash and other important issues, the economizer of H production of fin tube provides an effective solution. Fin tube is mainly used for new type economizer and ship power plant boiler maintenance boiler manufacturing H type finned tube economizer technology, H type or H type finned tube, fin tube, also called butterfly tube, it is the two middle symmetrical circular steel tubes are welded together with the light the formation of fins (rib or disc), positive shape like the letter "H", it is known as the H type fin tube.
(A) using H type fin fin tube economizer to replace the bare tube economizer finned economizer technology principle of economizer, can increase the heat transfer area, increasing the smoke flow section, reduce smoke speed, reduce wear. The wear rate of the tube is proportional to the 3.33 of the flue gas flow rate, so if the flue gas velocity is reduced from 9m/s to 7m/s, the wear rate will be reduced to 43%. The experimental results show that the fin tube itself in the fly ash to the middle row tube focused on the role of the fin tube economizer in the structure to reduce wear.
(B) H type finned tube economizer technology principle of H type fin tube, also known as the H type finned tube, also called butterfly tube, it is the two middle symmetrical circular sheet steel and light pipe welded together forming fins (rib or disc), shape quite positive like the letter "H", it is known as the H type fin tube. The H type fin tube with two fins is rectangular, approximately square, its length is about 2 times of light pipe. Extended heated surface. The H type fin tube using flash resistance welding method, the welding fusion rate is high, the tensile strength of the weld, with good heat transfer properties. The H type fin tube can be made into double "double H" type finned tube, its structural rigidity, can be applied to the tube row long situation. Structural form: basic form of "H" type and double "H" type.
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