公开(公告)号：USRE37557E1

公开(公告)日：2002-02-26

申请号：US09378083

申请日：1999-08-19

申请人： Freidrich Bahner ,  Manfred Braun ,  Gerhard Lehn ,  Karl Maurer ,  Manfred Schmidt ,  Josef Steinkuhl ,  Karl-Friedrich Lang

发明人： Freidrich Bahner ,  Manfred Braun ,  Gerhard Lehn ,  Karl Maurer ,  Manfred Schmidt ,  Josef Steinkuhl ,  Karl-Friedrich Lang

IPC分类号： F26B300

CPC分类号： F26B3/283 ,  F26B15/12 ,  F26B21/06 ,  F26B23/002 ,  F26B23/02 ,  F26B23/10 ,  Y02P70/405

摘要： In order to dry boards, the boards are guided on racks through a drier and brought into contact with drying air in two stages. In a stage A with a higher drying power, the drying air is supplied at a higher temperature and with an at least average humidity, and in the other stage B, it is supplied at an average temperature and with a low humidity. The waste heat of the outgoing air from stage A is used for preheating the drying air. This process should reduce the consumption of primary energy. For that purpose, a process is known that consists of also using the outgoing air condensation heat. This has the inconvenience, however, of requiring substantially more secondary energy, as important air mass flows are required to transfer heat because of the low condensation temperature. Primary energy should be reduced by using condensation heat without substantially increasing secondary energy requirements. According to the invention, the outgoing air from stage A is supplied to stage B through a heat exchanger arranged in the rack of the drier. The drying air of stage B is supplied in counter-current through the drier with a low humidity and temperature, so that the boards are dried in stage B both by condensation heat and by radiant heat. Thus only a reduced mass flow of drying air is required to transfer the condensation heat. The consumption of primary and secondary energy is low. This invention is suitable for drying boards as for buildings and gypsum plain boards or fiber boards.

摘要翻译： 为了干燥板，板通过干燥器在机架上引导，并与干燥空气接触两个阶段。 在具有较高干燥能力的阶段A中，干燥空气在更高的温度和至少平均湿度下供应，而在另一个阶段B中，在平均温度和低湿度下供应干燥空气。 来自阶段A的排出空气的废热用于预热干燥空气。 这个过程应该减少一次能源的消耗。 为此目的，已知一种也使用输出空气冷凝热组成的方法。 然而，由于低冷凝温度，重要的空气质量流量需要传递热量，所以这带来了非常多的二次能量的不便。 应通过使用冷凝热来减少一次能源，而不会大幅增加二次能源需求。 根据本发明，通过布置在干燥器的齿条中的热交换器将来自阶段A的排出空气供应到阶段B. 阶段B的干燥空气通过干燥器以低湿度和温度逆流供应，使得板在B阶段通过冷凝热和辐射热干燥。 因此，只需减少干燥空气的质量流量来转移冷凝热。 一次和二次能源的消耗低。 本发明适用于建筑物，石膏板，纤维板等干燥板。