The necessity of regularly removing dirt from brazed plate heat exchangers　

The fouling formed during the operation of brazed plate heat exchangers has an impact on heat exchange. To remove dirt, the heat exchanger should be regularly cleaned of dirt. When designing a heat exchanger, the influence of fouling can be considered by reducing the heat transfer coefficient or increasing the heat transfer area. The usual practice is to choose a value for a certain fouling coefficient, but it is difficult to explain whether it is correct in practical operation. In general, reasonable cleaning intervals should be specified as the basis for selecting the fouling coefficient value, and then the required increase in heat transfer area should be added in the design. Nevertheless, cleaning is inevitable. It can be seen that determining the cleaning time interval is very important for cleaning. Cleaning too early increases costs; If cleaning is too late, it will affect heat exchange. The second question is what cleaning method to use. Practice has shown that different types of dirt lead to different cleaning methods. In addition, cleaning costs should also be considered. Although some methods are effective, their cost is too high, and whether to use them should also be considered. Of course, during the operation of the heat exchanger, if strict pre-treatment of the cold and hot media can be carried out to prevent or delay scaling, it will not be a very important means of loss.