Heat exchanger capable of effectively preventing incrustation scale hazard

Abstract

The invention discloses a heat exchanger capable of effectively preventing incrustation scale hazard. The heat exchanger comprises a heat exchanger shell and fire tubes arranged in the heat exchanger shell, wherein the sections of the fire tubes are square; the lower parts of the fire tubes are vertical fire inlets; the middle parts of the fire tubes are bent; and the upper parts of the fire tubes are vertical fire outlets. The incrustation scale layers at edges or corners easily cracke under stress effects due to square fire tubes; unbalanced temperature difference on the surfaces of the fire tubes and line expansion difference due to expansion and contraction between stainless steel and the incrustation scale can cause continuous cracking of the incrustation scale layers; the motive power produced by convection and evaporation when water is heated can flush the accumulated incrustation scale according to the design of water flow channels, so that the incrustation scale is difficult to accumulate and easy to fall off; and the regularly arrayed fire tubes make the falling off incrustation scale directionally move towards a incrustation scale storage groove and then stored. The motions are continuous and repeated, so that the incrustation scale does not seriously affect heat exchanging process after being produced. And the manual cleaning can be regularly performed through all slag holes.

Description

technical field [0001] The invention relates to the field of heat energy equipment, and more specifically relates to a heat exchanger. Background technique [0002] The heat exchanger of the invention is suitable for use in steam generators, water boilers and water heaters. After impurities in the water enter the heat exchangers of steamers, boilers, and hot water machines, as the water temperature continues to rise or evaporate, scale will form on the surface of the fire tube. [0003] Scale refers to the fact that during the heating process of water in nature, the substances in the form of calcium, magnesium, sodium and other ions in it become more chemically active than in cold water when they encounter carbon dioxide and water released during the heating process. A chemical process in which crystalline salts are produced by combining acid radicals of different forms. Scale is a common name for a mixture of many salts and impurities. [0004] Scale is very harmful: for...

AI Technical Summary

Problems solved by technology

Its shortcoming is to use coercive means to change the laws of nature, so that the investment increases, the efficiency decreases, and the harm is not eliminated and increases with time.

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