With the successful application of high-temperature heat pump dryers to drying in many industries, more and more kelp processing factories choose to use seafood heat pump dryers. The kelp produced in the kelp drying room is flat, non-sticky, fast drying and good in color. The dried kelp is superior to dried kelp in terms of quality and color.Several major problems exist when kelp is dried:1. Production status and existing problems of dehydrated kelp. At present, most of the production of dehydrated kelp adopts the traditional drying method-fire way heating and drying method, which has the following problems:1. The heating temperature is too high. With traditional drying technology, the heating temperature is not easy to control. Generally, the heating temperature is around 75-90℃, and the drying process of dehydrated vegetables requires that the drying temperature should not exceed 65℃.2. The drying time is too long. Using traditional methods, it takes at least 24 hours to process 1 ton of vegetables. Even so, reheating and drying are occasionally caused by poor drying effects and rework.3. Large energy consumption. The traditional drying process has low thermal efficiency, about 30%-60%. During the drying process, the heat of drying and evaporating moisture accounts for about 36%, and the waste gas loss accounts for about 58%. Dry materials take away heat and dryer heat. The losses accounted for 2% and 2% respectively, and the thermal efficiency was only 40%.