The second phase of Sun Paper's papermaking project invested 2.45 billion yuan to build two production lines with an annual output of 600,000 tons of light-weight coated white-faced cattle cardboard and an annual output of 100,000 tons of slag pulp high-strength corrugated paper. Thermal power projects and expansion of sewage treatment stations. Three sets of PL-100 Freeflow series detachable plate heat exchangers with an annual output of 600,000 tons of cattle cardboard are used for the process cooling of 30℃ papermaking coatings. Taking into account the corrosion and the particularity of the material process, the 316L material and 0.6mm thickness we selected can resist the corrosion of papermaking coatings. The "V"-shaped corrugated plate has a 60-degree included angle and is equipped with a 4 mm diameter channel to meet the requirements Special requirements for 500/1500CP viscosity. The PL-100 wide flow channel plate heat exchanger used in this process section has stable performance, safety and reliability, and has been well received by users.