Penetration type concave-convex blade rotor inside heat exchange pipe

Abstract

The invention relates to a penetration type concave-convex blade rotor inside a heat exchange pipe. The penetration type concave-convex blade rotor inside the heat exchange pipe is formed by hollow shafts and spiral blades; groove structures are formed in back water sides of the spiral blades along the spiral directions of the blades; holes are formed in cross sections of the blades; the holes extend along the spiral directions of the blades to penetrate the whole blades to form into penetration holes; flow disturbance shafts namely projections are formed by the wall thickness of the penetration holes on the blades. The perturbance of the flow disturbance shafts and the concave-convex fluctuation functions of the grooves which are formed in the back water sides of the blades continuously act on the heat transmission fluid along the facing water sides, so that the radial speed and the tangential speed of the fluid on two sides of the blades are increased and the flow disturbance effect is increased. According to the penetration type concave-convex blade rotor inside the heat exchange pipe, the rotor can play a good self-centering role during rotating in the fluid due to the fact that the fluid has a suspension force function on the penetration holes when flowing through the penetration holes, scrapping between the blade tops and the pipe walls is avoided, the service life of the rotor is prolonged, mass and energy exchange between fluids inside the pipe is greatly enforced due to the separation effect of the penetration holes, and antiscale, descaling and heat transmission reinforcement functions are achieved.

Description

technical field [0001] The invention relates to an interpolation element for enhancing heat transfer and anti-fouling and decontamination in heat exchange tubes used in shell-and-tube heat exchangers, heat exchange reactors and other equipment, in particular to an interpolation element that uses the heat transfer fluid inside the heat exchange tube as the Power, through-type concave-convex blade rotor that realizes self-cleaning and enhanced heat transfer function. Background technique [0002] Energy saving and emission reduction is a key technology that the whole world attaches great importance to. It is applied to many heat exchangers in many fields such as petroleum, chemical industry, thermal power, nuclear power, metallurgy, light industry, aviation devices and marine vehicles, among which the most Shell-and-tube heat exchangers are widely used, but there are common problems of fouling and fouling in the inner walls of these heat exchange tubes, which lead to increased...

AI Technical Summary

Problems solved by technology

In general, the spiral bond has the following main disadvantages: (1) The bond is a whole, which directly scratches the heat transfer tube and damages the inner wall of the heat transfer tube; (2) When the fluid flows to push the bond to rotate, it requires a large driving torque and consumes more (3) The service life of the bearing used for single-end fixing is short; (4) The effect of field synergy enhanced heat transfer generated by the bond is not significant

But the disadvantage is that when a certain fluid passes through, the rotation speed of the rotor is determined by the helix angle of the screw flight. When the screw flight lead is small, the rotation speed of the rotor is fast, and the resistance to the fluid increases accordingly; in order to facilitate the rotation of the rotor Installation, there is a large distance between the outer diameter surface of the rotor and the inner diameter surface of the heat exchange tube, so the enhanced heat transfer and anti-scaling and descaling capabilities of the rotor are limited to a certain extent.

In addition, the rotor will shake during the rotation process, and the top of the blade will scratch the inner wall of the heat exchange tube, which will also reduce its service life. Therefore, the rotor should have a better centering effect in the heat exchange tube to reduce its friction. The scraping effect with the inner wall of the heat exchange tube prolongs its service life

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