Papermaking drying device

Abstract

The invention discLoses a papermaking drying device and reLates to the technicaL fieLd of drying. The device comprises heat transfer assembLies, heat conduction roLLers, a drying cyLinder, an eLectromagnetic induction coiL, a connection pipe, a heater and a temperature sensor; the heat transfer assembLies, the heat conduction roLLer, the eLectromagnetic induction coiL and the temperature sensor are arranged in the drying cyLinder, the four heat transfer assembLies are correspondingLy arranged on the surfaces of the heat conduction roLLers respectiveLy, and the eLectromagnetic induction coiL isarranged in the heat conduction roLLer; the temperature sensor is arranged at the right end of the heat conduction roLLer, and the heat conduction roLLer and the temperature sensor are connected to the heater through the connection pipe. The papermaking drying device has the advantages that the drying efficiency of a traditionaL papermaking technoLogy is Low, drying equipment is compLex, throughoptimization of a power frequency converter, the drying device is simpLer in structure, instaLLation better adapts to the appLication environment, and by using the design of the position of the eLectromagnetic induction coiL, the situation is avoided that after moisture is dried and evaporated, steam is condensed on the eLectromagnetic induction coiL, and accordingLy water drops are formed; therefore, the quaLity of paper production is improved.

Description

technical field [0001] The invention relates to the technical field of drying, in particular to a drying device for papermaking. Background technique [0002] In ordinary papermaking technology, the pulp is formed into wet paper and then dehydrated by pressing the press roll and absorbing water from the felt. The moisture content of the wet paper after dehydration is still as high as 53%-60%, and at this time, it is impossible to reuse the machine. For dehydration, it needs to go through a series of rotating steam drying cylinders. The drying cylinder is generally designed with an axially rotating cylinder. The wet paper can be more flat and rotated on the drying cylinder, and the water is evaporated by the temperature in the steam drying cylinder. and remove the water vapor through the exhaust. Generally, the temperature of the steam dryer is between 40°C and 180°C. The set temperature and the number of rotating steam dryers are determined by the thickness and quality requ...

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Problems solved by technology

[0003] In the existing technology, the cylinder body of the dryer is heated by electromagnetic induction heating, so that the temperature of the cylinder body reaches the specified temperature to dry the paper, so as to realize the problem of energy saving and environmental protection. However, the structure of the current dryer cylinder is relatively complicated. The method of connecting a group of electromagnetic induction coils to a power converter, due to the complexity of the equipment, its scope of application is relatively limited

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