Maintenance requirements and precautions for plate heat exchanger_
Maintenance requirements and precautions for brand plate heat exchangers
593 In order to improve the maintenance efficiency of brand plate heat exchangers and reduce the error rate of operation, the staff must first identify the problem, and then take specific measures according to the cause of the problem. In this process, some problems should Meet the requirements of related operations. The following will give you a detailed introduction to the maintenance requirements and precautions of the brand plate heat exchanger: In addition to the maintenance under special circumstances, the plate heat exchanger should also be regularly repaired. The plate heat exchanger is easy to maintain and easy to disassemble and assemble. Different methods can be adopted according to the situation. If the equipment has no leakage and the heat transfer system drops, it is no better than disassembling and repairing. You only need to use a closed circuit system to get the lye into the equipment for a few hours. If there is no such condition, and the scale formation is not very serious after disassembly, there is no need to remove the plate, just rinse with water or scrub with a brush. There are many things to pay attention to in terms of cleaning and cleaning methods for plate heat exchangers. Do not use hydrochloric acid or water with high chloride concentration to clean stainless steel plates, and do not use phosphoric acid or sulfuric acid to clean titanium plates. In-situ cleaning is the main way to clean plates, especially when the process liquid in the device is aggressive. When cleaning the heat exchanger, drain the liquid in the inlet and outlet pipes on both sides of the heat exchanger. If it is not exhausted, water can be used to forcibly flush out the process liquid. Precautions for the maintenance of plate heat exchanger ① Replace the cracked or perforated plate, and use the light transmission method to find the crack on the plate. ②Adjust the operating parameters to reach the design conditions. ③The clamping size should meet the requirements when repairing and assembling the heat exchanger, not as small as possible. ④The plate data of the plate heat exchanger are reasonably matched. The flow channel of the stainless steel plate heat exchanger refers to the medium flow channel formed by two adjacent plates in the plate heat exchanger. Generally, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels. The process combination form should be calculated based on heat exchange and fluid resistance, and determined under the requirements of process conditions. Try to make the convective heat transfer coefficients in the cold and hot water channels equal or close to each other to get a better heat transfer effect. Because the convective heat transfer coefficient on both sides of the heat transfer surface is equal or close to the heat transfer coefficient to obtain a larger value. Although the flow velocity between the plates of the plate heat exchanger is not equal, the average flow velocity is still used in the calculation of heat exchange and fluid resistance. Because the U-shaped single-flow pipes are fixed on the pressing plate, it is convenient to disassemble and assemble. The above is an introduction to the maintenance requirements and precautions of the brand plate heat exchanger, I hope it will be helpful to you. For more information about the maintenance of plate heat exchangers, please pay attention to the official website of Diguang!