Views:0 Author:Site Editor Publish Time: 2020-06-15 Origin:Site
The heat transfer sheet material of the plate heat exchanger is generally austenitic stainless steel, and the models are roughly AISI 304, 304L, AISI 316, 316L, 316T, and i stainless steel materials need to be cleaned with nitric acid-based cleaning agents. (NBR) 130-140, butyl rubber (RCB) 140, ethylene propylene rubber (EPDM) 150, these materials are resistant to acid, alkali, ketone, alcohol and other solutions. Based on this, we use the special cleaning agent for stainless steel products developed by the Energy Research Institute of the Henan Academy of Sciences (the cleaning agent has passed the technical identification organized by the Henan Provincial Department of Science and Technology), mainly nitric acid, glycolic acid, corrosion inhibitors, penetrants, and disinfectants Composed of chemical agents such as foaming agents, this cleaning agent has the characteristics of high descaling rate, low corrosion rate, and fast descaling rate for stainless steel products. The optimal cleaning concentration is in the range of 0 · 10 ~ 0 · 15mol / L. The performance indicators of the cleaning agent have been tested in accordance with HG / T 2387-2007 "Quality Standards for Chemical Cleaning of Industrial Equipment".
First close the inlet and outlet valves of the heat medium of the plate heat exchanger, then close the inlet and outlet valves of the cold medium, drain the medium (usually water or steam), and use a steel ruler to measure the net size of the heat exchanger's compressed heat exchanger. (The distance between the inner surfaces of the two pressing plates) and record. Remove the clamping bolts of the heat exchanger evenly and symmetrically, gently push the movable compression plate along the track, and remove the heat transfer sheet one by one (be careful not to tear or tear off the sealing rubber pad), and follow the order Put it right. Since some heat exchangers use heat transfer fins with multiple lines, it is important to keep in mind the number of fins and the combination order of multiple lines.