The tube heat exchanger is a device that uses cold and hot fluids to alternately flow through the surface of the regenerator (filler) in the regenerator to exchange heat. The cold and hot fluids of the partition volumetric heat exchanger are separated by solid partition walls, and the equipment exchanges heat through the partition walls, so it is also called a surface heat exchanger. The main factors affecting the corrosion of equipment tube sheets are as follows:
       1, Medium composition and concentration: The influence of concentration is different. For example, in hydrochloric acid, generally the greater the concentration, the more serious the corrosion. Carbon steel and stainless steel have concentrations of50Corrosion is serious in sulfuric acid containing about %, and when the concentration increases to60When the ratio is more than %, the corrosion will decrease;
       2, Impurities: Harmful impurities include chloride ions, sulfide ions, cyanide ions, ammonia ions, etc. These impurities can cause serious corrosion under certain circumstances;
        3, Temperature: Corrosion is a chemical reaction, and every time the temperature rises 10℃, the corrosion rate increases by approximately1~3times, but there are exceptions;
       4,phValue: NormalphThe smaller the value, the greater the corrosion of the metal.Tube and tube heat exchangerTherefore, it is widely used. Although it is not as good as the plate type in terms of thermal efficiency, compactness, and metal consumption, it has the characteristics of solid structure, high reliability, strong adaptability, and wide use of materials.
       5, Flow rate: In most cases, the greater the flow rate, the greater the corrosion.