When cleaning, first immerse the plate in an alkali bath at a temperature of 57-60 ° C (if the temperature is 70-80 ° C) for 48 h, using the high temperature of the lye to paste on the plate The sealant and scale on the sheet soften. A thin rectangular channel is formed between the various sheets, and heat exchange is performed through the half sheets. Textile industry: cooling of viscose aqueous solution, boiling nitrocellulose cooling, etc. Metallurgical industry: heating or cooling of aluminate mother liquor, cooling of steelmaking process, etc. Brazed plate heat exchangers are 3-4 times more efficient than shell-and-tube heat exchangers. Metallurgical industry: aluminate mother liquor heating or cooling, steelmaking process cooling, etc. A heat exchanger is an energy-saving device that transfers heat between materials at two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid. In order to meet the requirements of the process conditions, the brazed plate heat exchanger is also one of the main equipments for improving energy efficiency. Textile industry: cooling of viscose aqueous solution, boiling nitrocellulose cooling, etc. When cleaning, firstly immerse the plate in an alkali bath at a temperature of 70-80 ° C for 48 h, and use a high-temperature brazed plate heat exchanger of lye to make the sealant adhered to the plate and The scale is softened. Among them, the petrochemical industry is still the same two fluids in the heat exchanger industry flowing in the space separated by the wall, the heat conduction through the wall and the convection of the fluid on the wall surface, the heat exchange between the two fluids. Since the main component of the scale on the sheet is sodium aluminum silicate, the acid solution is 8% hydrochloric acid plus zero. Brazed plate heat exchanger is a new type of high efficiency heat exchanger which is brazed by a series of metal sheets with a certain corrugated shape. The plate heat exchanger pad has good water absorption. Even after being immersed in water, the electrical resistance is good, the chemical corrosion resistance is also good, and it has great resistance to various chemicals, acids and alkalis. Also pay attention to the timely cleaning of the decontamination device and the filter, so that the entire work can be completed smoothly.