Straight fin for coke oven ascending pipe raw coke oven gas waste heat recycling and heat taking device and heat taking device

Abstract

The invention provides a straight fin for a coke oven ascending pipe raw coke oven gas waste heat recycling and heat taking device. The straight fin comprises a straight fin body (1) and a set of V-shaped notches (2) formed in the straight fin body (1). The depth h of the V-shaped notches (2) is smaller than the width H of the straight fin body (1). In the longitudinal direction of the straight fin body (1), the distances between the adjacent V-shaped notches (2) are increased from bottom to top. The invention further provides a heat taking device comprising the straight fin and a power generation device. The straight fin is simple in structure, low in cost and convenient to use, the heat transmitting performance of the raw coke oven gas side is greatly enhanced, and the wall face temperature is increased. Meanwhile, the width, the angle and the height-direction distance of the V-shaped notches in the top end of the straight fin are determined according to temperature field distribution during device usage, and when the device is used, the longitudinal swelling amount of the top end of the fin is smaller than or equal to the notch width, and after total expansion in the height direction, the straight fin is still kept in a flat rectangle and cannot disengage from the inner barrel wall, and the service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of boiler equipment, and in particular relates to a straight fin used for a coke oven ascending tube raw gas waste heat recovery heat recovery device, and also relates to a coke oven rising tube waste gas waste heat recovery heat recovery device including the above straight fins. The utility model relates to a coke oven ascending tube waste heat boiler power generation device including the above-mentioned straight fins. Background technique [0002] Fins are the basic elements of plate-fin heat exchangers, and the heat transfer process in plate-fin heat exchangers is mainly accomplished through the heat conduction of the fins and the convective heat transfer between the fins and the fluid. The fins are the secondary heat exchange surface, which can not only expand the heat transfer area, improve the compactness and heat transfer efficiency of the heat exchanger, but also support the core and improve the stre...

AI Technical Summary

Problems solved by technology

If the straight fins of the conventional rectangular thin plate structure are directly welded to the wall of the raw gas channel, for the top of each straight fin, the thermal expansion rate of the lower part is greater than that of the upper part. At the same time, at the same height position, the fin top The thermal expansion rate of the straight fin is greater than that of the root. Therefore, for the entire straight fin, there will be a more complicated and different expansion situation everywhere, and it is inconsistent with the tube wall. Eventually, the weld between the straight fin and the tube wall will be torn due to Cracked and disengaged, making the heat transfer area of ​​the straight fins invalid

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