Daily maintenance and overhaul steps of plate heat exchanger_
552 plate heat exchanger is a new type of high-efficiency heat exchange equipment made of metal sheets with a certain corrugated shape. The main components include: heat transfer plates, gaskets, compression plates, and clamping bolts. In order to extend the service life of the plate heat exchanger, the user must do the relevant maintenance and overhaul work at ordinary times. The following editor will tell you about the routine maintenance and overhaul steps of the plate heat exchanger, so as to provide users in need reference. Under normal circumstances, we mainly distinguish plate heat exchangers according to their structure, that is, according to their appearance. They can be divided into four categories: ①Removable plate heat exchangers (also called plate heat exchangers with gaskets), ② Welded plate heat exchanger, ③ Spiral plate heat exchanger, ④ Plate coil heat exchanger (also called honeycomb heat exchanger). Among them, the welded plate heat exchanger is divided into: semi-welded plate heat exchanger, fully welded plate heat exchanger, plate and shell heat exchanger, and brazed plate heat exchanger. The surface of the heat exchange plate is pressed into a corrugated or grooved shape to increase the rigidity of the plate, increase the turbulence of the fluid, and improve the heat transfer efficiency. Its materials are mostly stainless steel, copper, aluminum, aluminum alloy, titanium, nickel, etc. The corner holes at the corners of the board play the role of connecting channels. The working medium flows alternately in the narrow and tortuous channels formed between the plates to exchange heat. Because the plates are installed upside down, the thousands of contacts formed by the cross corrugation are staggered and evenly distributed, causing the fluid to recirculate around these contacts, causing strong disturbances, forming a very high heat transfer coefficient, and making the heat exchanger have a very high The heat transfer efficiency and pressure capacity. The maintenance steps and procedures of the plate heat exchanger are as follows: 1. Check whether the inlet and outlet valves of the cold and hot medium are closed. 2. Measure the size of the clamp of the plate heat exchanger (the distance between the two iron plates) and record it. 3. Open the heat exchanger and remove the bolts evenly. After removing the bolts, remove the clamping movable plates and remove them one by one. And record the order of the plates. 4. Initial inspection of boards and pads. The undamaged boards and pads are set aside. 5. When inspecting the board and pad, remove the pad from the board. 6. After the cleaning paper and other paper are dry, check the paper again. 7. After checking the paper, fit the cushion to the paper. 8. The plates of good rubber pads are sequentially arranged on the plate heat exchanger frame in the order in which they are removed, and the movable plates are moved and clamped so as to be in close contact with the plates. The upper bolt clamps the clamping plate, and the clamping size is the recorded size (this size may not match the recorded size, because the size is slightly larger after replacing the new rubber pad) 9. Test the pressure on the plate heat exchanger according to the design/pressure test on the board. The holding time is 30 minutes. .10. If there is no leak, the repair is over. If there is a leak, please follow 3, 4, 8 and 9 to reopen the plate heat exchanger. The repair is over until there are no leaks. The above is an introduction to the routine maintenance and overhaul steps of the plate heat exchanger, I hope it will be helpful to you. If you want to know more about the maintenance plan, price, process and other information of the plate heat exchanger, please go to the official website of Diguang Heat Transfer to learn more.