Heating control device and method of dying box for reconstituting tobacco by papermaking method

Abstract

The invention discloses a heating control device and method of a drying box for reconstituting tobacco by a papermaking method. The heating control device includes a heat exchanger, a steam valve, a pressure meter, a hot air drying box, a temperature meter, a steam pipeline and a hot air pipeline. A control system receives detection signals of the on-site pressure meter and the temperature meter,reads the operating speed of a production system at the same time, automatically calculates a steam preset pressure value, and outputs the opening degree of the steam valve after through a PID interlocking control circuit composed of the pressure meter and the steam valve. During the production preheating phase, the situation of mechanical damage of heat exchanging equipment caused by water attackis prevented from occurring by controlling the rising slope of the opening degree of the steam valve; and during the production operating phase, the situation that heat exchanging quality is influenced due to phase state changing of the heat exchanger caused by drastic fluctuation of pressure is prevented from occurring by controlling the rising slope and the falling slope of preset parameters ofthe pressure, the smoothness of control is ensured, and the stability of the quality of heated paper sheets is ensured.

Description

technical field [0001] The invention belongs to the technical field of reconstituted tobacco leaf papermaking, in particular to a heating control device and method for a papermaking reconstituted tobacco leaf drying box. Background technique [0002] Paper-making reconstituted tobacco production line drying oven equipment is to slowly bake the coated wet paper sheets by circulating hot air to obtain soft and dry reconstituted tobacco leaves. The hot air in the drying box is circulated and heated by air passing through the heat exchanger. The heating medium of the heat exchanger is steam. The steam valve installed on the steam pipe is used to adjust the amount of steam to control the temperature of the hot air. [0003] In the production process of reconstituted tobacco leaves by papermaking method, the hot air temperature of the drying oven plays a vital role in the stability of product quality. Accurate and stable hot air temperature can effectively ensure the softness and ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a heating control device and method for a reconstituted tobacco leaf drying box by papermaking method, which solves the problem of unstable control in the temperature control mode of the existing hot air drying box, which leads to unstable product quality control, and the steam pipe accessories and subsequent stage The problem of unsafe operation of equipment

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