Self-vibration composite smoke tube with internally-inserted bent fins

Abstract

The invention discloses a self-vibration composite smoke tube with internally-inserted bent fins. The self-vibration composite smoke tube comprises a light tube and two half-range fins, wherein the half-range fin comprises a base tube and a plurality of fins, and the outer wall of the base tube is tightly attached to the inner wall of the light tube; the fins are arranged on the inner wall of the base tube, the free ends of the fins deviate from the connecting ends of the fins and the base tube, the cross sections of the two half-range fins are in central symmetry about the circle center of the light tube, and the cross section shapes and areas of the half-range fins are not changed; and matching connectors are arranged at the two ends of each base tube, and the base tubes form a whole circle through the matching connectors. The fins are parallel, the farther the fins are away from the center face, the shorter the length of the fins is, and the uniformity of a temperature field perpendicular to the center section of the tube is achieved to the maximum degree. Compared with a light tube with the same size, the heat exchange area is increased by 3.5 times or above, the heat exchange coefficient is 3 times or above that of the light tube at the same flow speed, the comprehensive heat exchange capacity is 10 times or above that of the light tube, the size of the smoke tube type heat exchanger can be greatly reduced, and efficient and compact heat exchange, carbon reduction and energy conservation are achieved.

Description

technical field [0001] The invention belongs to the technical field of enhanced heat exchange in tubes, and in particular relates to a composite smoke tube with self-vibrating, interpolated, bent and flexed fins. Background technique [0002] The enhanced heat transfer technology in the tube is mainly divided into three categories: smooth tube external rolling and internal convex thread turbulence enhancement, interpolation turbulence enhancement, and intercalation fin expansion heating surface enhancement. The thread turbulence strengthening by rolling outside the tube is the most widely used. Rolling on the outer surface of the smooth tube and protruding the inner surface of the tube to form a threaded smoke tube, but only destroys the laminar boundary layer on the inner wall surface, the strengthening ability is limited, and the heat transfer performance is only limited. It can be increased by about 50% to 100%. The heat transfer performance of the enhanced tube inserted...

AI Technical Summary

Problems solved by technology

The CN202660955U utility model applied by Siping Power Supply Company of Jilin Electric Power Co., Ltd. adds a trapezoidal thread on the light pipe, which is essentially an enlarged thread structure of the threaded smoke pipe. It only destroys the laminar flow boundary layer on the inner wall, and its strengthening ability is limited.

Images