High-efficiency and energy-saving drying system of dry printing laminating machine

Abstract

The invention discloses a high-efficiency and energy-saving drying system of a dry printing laminating machine. The drying system comprises a drying tunnel, wherein a plurality of guide rollers for conveying a material are arranged in the drying tunnel; an air inlet is formed in a feed end of the drying tunnel; an air outlet is formed in a discharge end of the drying tunnel; the drying tunnel is divided into a plurality of bellows, sequentially connected in series, along the material conveying direction; air return devices for sending air in the downstream bellows to the upstream bellows are arranged on the downstream bellows; and a heating device is arranged in the bellows positioned at the discharge end of the drying tunnel. With the adoption of the drying system, an energy utilization ratio is increased greatly; on the premise of ensuring the same drying effect, the number of the heating device can be reduced, and energy consumption is saved; in addition, various bellows of the drying system are mutually communicated, so that the number of fans can be reduced, and the construction cost and the system energy consumption are further saved.

Description

technical field [0001] The invention relates to the field of printing compound machines, in particular to a high-efficiency and energy-saving drying system of a dry printing compound machine. Background technique [0002] Commonly used printing compound machines are usually composed of surface / bottom material unwinding unit, feeding traction unit, coating unit, drying system, compounding unit, winding unit and control system. In the traditional drying system, the drying tunnel is usually 9 meters and three sections. Each section of three meters is an independent bellows. The bellows is equipped with arched guide rollers. Each bellows is equipped with an air inlet fan, an exhaust fan and a heating device. , The heating device is installed on the air inlet pipe outside the bellows, the airflow passing through the heating device is heated into hot air, which is sent into the bellows by the inlet fan, and the exhaust fan draws out the air in the bellows, which can be directly di...

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Problems solved by technology

[0003] The disadvantage of the traditional drying system is that the energy efficiency ratio is poor and the heat utilization rate is very low. The main reasons are: 1) The heating device is located outside the bellows, and part of the heat in the heating process is directly emitted and lost, resulting in energy waste; 2) Each section of the bellows Separately set up independent air supply and heating devices, the energy consumption is too large, and it also increases the construction cost and maintenance cost of the drying tunnel

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