Three-phase equilibrium efficient and uniform-temperature hot-blast air tunnel furnace drying device

Abstract

The invention discloses a three-phase equilibrium efficient and uniform-temperature hot-blast air tunnel furnace drying device which can bake cloth with printing and comprises a drying line, a conveyor belt capable of penetrating through the entire drying line to transfer a workpiece, a driving motor capable of driving the conveyor belt to work, a control panel capable of controlling working of the hot-blast air tunnel furnace drying device, and a workpiece radiating device arranged at the tail end of the conveyor belt and blowing the workpiece for radiation, wherein the drying line is formedthrough splicing and combining of a plurality of drying modules and has a modular structure; and the drying modules comprise a standard drying module, and a humidity eliminating and heat recovery drying module.

Description

technical field [0001] The invention relates to the technical field of hot air tunnel furnace drying equipment, in particular to a hot air tunnel furnace drying device with three-phase balance, high efficiency and uniform temperature. Background technique [0002] At present, the heating methods of the existing hot air tunnel furnace drying lines on the market are as follows: 1) The hot air tunnel furnace drying line is heated by far-infrared heaters: heat energy is mainly transmitted in the form of radiation at high temperatures. It shows that at high temperature, 90% of heat energy is transmitted in the form of radiation, and its radiation intensity is proportional to the fourth power of temperature, and the absorption capacity of radiant heat energy is proportional to the surface blackness of the heated object. If the drying line It is used to dry white cloth, the heat utilization efficiency is low, and it is easy to yellow the white cloth. In addition, the distance betw...

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Problems solved by technology

[0002] At present, the heating methods of the existing hot air tunnel furnace drying lines on the market are as follows: 1) The hot air tunnel furnace drying line is heated by far-infrared heaters: heat energy is mainly transmitted in the form of radiation at high temperatures. It shows that at high temperature, 90% of heat energy is transmitted in the form of radiation, and its radiation intensity is proportional to the fourth power of temperature, and the absorption capacity of radiant heat energy is proportional to the surface blackness of the heated object. If the drying line It is used to dry white cloth, the heat utilization efficiency is low, and it is easy to yellow the white cloth

In addition, the distance between the heaters in the furnace is large, the difference between the temperature measurement point and the actual temperature is relatively large, and the three-phase imbalance of the input power is likely to be caused during the working process.

Moreover, the high-temperature moisture inside cannot be discharged, and the drying efficiency is not high; 2) The hot air tunnel furnace drying line is heated by pure resistance stainless steel heating tubes: the interior mainly uses cluster-type tubular heating elements, and the distance between the heating tubes in the furnace Large, the temperature on the transmission belt is uneven, the difference between the temperature measurement point and the actual temperature is relatively large, and the working process is likely to cause the three-phase imbalance of the input power supply

Moreover, the internal high-temperature moisture cannot be discharged, and the drying efficiency is not high; 3) The hot air tunnel furnace drying line is heated by induction heating: the induction heating is used for heating, the efficiency is low, the temperature control is not accurate, and the manufacturing cost is high ;4) Heating the hot air tunnel furnace drying line by gas heating: the temperature control is not accurate, and the combustion process will pollute the environment, which is not suitable for baking cloth; 5) The hot air tunnel furnace drying line is heated by fuel oil: the temperature The control is imprecise, the burning process will pollute the environment, it is not suitable for the printing industry to bake fabrics

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