Control method and system for wet method leather manufacturing

Abstract

The invention discloses a control method and a system for wet method leather manufacturing. By means of combination of hot air dying and drying-cylinder drying, base cloth is subjected to hot pressing and ironing at low temperature to improve surface quality of the base cloth; by means of three-section steam supply, trapezoidal utilization of energy is realized, fresh steam consumption is reduced while base cloth is dried, so that energy saving and consumption reduction are realized; the problem of safety in heating of conduction oil is solved by adoption of steam; by a multi-section heat supply control system, heat of steam condensate can be recycled completely, so that energy saving and consumption reduction are realized; owing to design of the control system, automatic production of a drying section is realized; in addition, adjustment of steam quantity according to operating conditions is realized so as to meet production requirements of different synthetic leather techniques.

Description

technical field [0001] The invention belongs to the technical field of leather manufacturing, and in particular relates to a wet tanning drying system and a control method. Background technique [0002] Synthetic leather is the best substitute for natural leather. At present, the wet production process of PU synthetic leather is to impregnate, scrape, solidify, wash the base material once, and then dry it with hot air to obtain the finished product. Among them, the purpose of drying is to adjust the morphology and structure of the base cloth by drying to remove the moisture in the base cloth while setting the base cloth. The traditional base cloth drying device is an oven, and the heat source used is the hot air formed by heating the cold air with heat transfer oil. The hot air blows and dries the wet base cloth in the oven through the hot air circulation system. Direct use of blowing hot air to dry makes the surface of the base cloth uneven and poor in surface quality. Th...

AI Technical Summary

Problems solved by technology

Direct use of hot air to dry makes the surface of the base cloth uneven and poor in surface quality

The heat transfer oil used at the same time is flammable and explosive, and has poor safety; the heat transfer oil has a small heat recovery rate and consumes a lot of energy

Therefore, in terms of the surface quality of the base fabric, energy saving and safety issues, it is not ideal to use heat transfer oil to heat the cold air and only use an oven to dry the base fabric with hot air.

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