Device and method for recycling of water vapor in drying system of paper pulp molded products and improvement of drying efficiency of drying system at same time

Abstract

The invention discloses a device and method for recycling of water vapor in a drying system of paper pulp molded products and improvement of the drying efficiency of the drying system at the same time. The device comprises a drying channel, wherein a dry transmission panel is arranged in the drying channel, the top of the drying transmission panel is provided with a horizontal plate, and a mounting plate is arranged at the top of the inner wall of the drying channel; and the top of the drying channel communicates with a water vapor recycling device, and the water vapor recycling device comprises a collecting shell, a ventilation plate, a water storage tank, a cooling pipeline, refrigerators and a water pump. Through arrangement of the water vapor recycling device, water vapor which is introduced into the collecting shell through the ventilation plate rises and adheres to the surface of the cooling pipeline tightly, and refrigeration of a cooling liquid and heat exchange between the cooling liquid and the water vapor are conducted through working of the refrigerators inside the cooling pipeline; and the water vapor is condensed, fall, and is stored in the water storage tank, and thestored condensed water can be used for humidification of paper pulp molding moisture regain, so that energy saving, emission reduction and water conservation are achieved.

Description

technical field [0001] The invention relates to the field of pulp molding production, in particular to a device and method for reusing water vapor in a pulp molding product drying system while improving the drying efficiency of the system. Background technique [0002] During the molding process of pulp molded products, after mold molding, the moisture content of the product is as high as about 70%, and it needs to be dried. The moisture content of the dried product is as low as about 5%. If it is directly shaped, it is prone to cracking and damage. In order to avoid cracking and damage, the surface of the product needs to be humidified after drying to increase the moisture content of the product surface to about 12%. [0003] At present, the widely used drying method is tunnel drying, that is, a tunnel drying channel is set in the drying area, and the products to be dried are transferred to the tunnel drying channel, and the heat emitted by the heat exchanger in the drying...

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Problems solved by technology

[0004] The object of the present invention is to provide a device and method for reusing water vapor in the drying system of pulp molded products while improving the drying efficiency of the system. By providing a water vapor reusing device, water vapor enters the interior of the collecting shell through the ventilation plate, The water vapor rises and sticks to the surface of the cooling pipe, and the refrigerator inside the cooling pipe works to exchange heat between the cooling liquid and the water vapor. After the water vapor condenses, it drops and stores in the water storage tank, and the condensed water is stored for molding the pulp Re-humidification, energy saving and emission reduction, saving water resources, to solve the problem of water vapor being drawn out of the drying chamber through the dehumidifier fan, and the waste of water resources caused by the dehumidifier fan taking away the water vapor

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