Combined type longitudinal finned pipe fume waste heat exchanger

Abstract

The invention discloses a combined type longitudinal finned pipe fume waste heat exchanger, belongs to a heat exchanger, and especially relates to a heat exchanger used for fume waste heat utilization. According to the combined type longitudinal finned pipe fume waste heat exchanger, the two ends of a rectangular solid heat exchanger shell are provided with a fume inlet and a fume outlet, and the shell is internally provided with a pipe bundle composed of longitudinal finned pipes. The combined type longitudinal finned pipe fume waste heat exchanger is characterized in that a water inlet main pipe and a water outlet main pipe communicated with inner pipes of the longitudinal finned pipes are positioned at the outer side of the shell, and the longitudinal finned pipes are combined type longitudinal finned pipes that steel pipes are sleeved in aluminium longitudinal finned pipes. The longitudinal finned pipe design that steel pipes are in expansion fit with aluminium longitudinal finned pipes, the heat exchanger has the advantages that the structure is compact, the resistance is small, the cleaning is easy, a pipe side can resist high pressure and resist ablation; the main pipe is arrange externally, the volume of the heat exchanger is reduced, the space in the heat exchanger is fully utilized, and the heat exchanger is easy to overhaul; and an ellipse diversion pipe is adopted, the fume blocking area is reduced on the condition that the flow of the pipe side is not reduced; the fume fully contacts with fins and the resisting force is reduced.

Description

technical field [0001] The invention belongs to an enhanced heat exchanger with no direct contact with heat exchange media, in particular to a heat exchanger for utilization of flue gas waste heat. Background technique [0002] With the depletion of non-renewable energy such as coal, oil and natural gas, more and more attention has been paid to energy recovery or recycling technology. Therefore, in the technical fields of coal-fired boilers and metallurgy, flue gas heat exchange technology has gained a wide range of applications. [0003] At present, the finned tubes used in most flue gas heat exchangers are composed of base tubes and transverse fins evenly distributed on the base tubes. Some base tubes and fins are steel tubes and steel sheets respectively, some base tubes are steel tubes, and fins are aluminum sheets. Generally, fins and base tubes are welded or wound to fix the fins on the base tube, which is cumbersome to process. Due to the horizontal arrangement of t...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of poor pressure bearing capacity and erosion resistance of existing heat exchangers using aluminum fins, as well as complicated manufacture, the present invention provides a composite longitudinal fin tube flue gas waste heat exchanger, the composite longitudinal fin The finned tube flue gas waste heat exchanger not only inherits the advantages of small resistance and easy cleaning of the longitudinal finned tube, but also improves the pressure bearing capacity and erosion performance

Images