Vacuum moisture regaining control process for tobacco leaf processing quality homogenization, energy conservation and consumption reduction

Abstract

The invention discloses a vacuum moisture regaining control process for tobacco leaf processing quality homogenization, energy conservation and consumption reduction, belongs to the field of cigaretteraw material processing, and covers threshing and redrying enterprises and tobacco shred producing workshops of cigarette factories or all using units related to vacuum moisture regaining equipment,and the vacuum moisture regaining equipment has software and hardware configuration. The vacuum moisture regaining equipment is mainly composed of a vacuum box body, a switch (box body) door mechanism, a vacuumizing system, a moisture steaming system, a steam distribution system, a compressed air system, a cooling water circulation system, an electric control system and the like. If the vacuum moisture regaining equipment is not provided with a negative pressure monitoring device, a negative pressure sensor for detecting the vacuum degree needs to be installed in a vacuum moisture regaining box body, a corresponding digital quantity input module or a corresponding PLC analog quantity module detection channel needs to be additionally arranged in a PLC system, and input and adjustment can becarried out on an operation page of an industrial control system. A control method and matched parameters are provided, the smoothness of the vacuum moisture regaining technological process is guaranteed, the processing efficiency of technological equipment is improved, and the energy consumption of the technological equipment is reduced while the batch tobacco leaf processing quality is improved.

Description

technical field [0001] The invention belongs to the field of cigarette raw material processing, covering leaf threshing and redrying enterprises and cigarette factory shred workshops or all units that use vacuum moisture resurfacing equipment, and more specifically relates to a tobacco leaf processing quality homogenization and energy saving and consumption reduction equipment Vacuum moisture regain control process. Background technique [0002] After the first-cured tobacco leaves are purchased by the tobacco company’s tobacco station, they are transferred to each threshing and redrying unit for threshing and redrying processing according to the allocation plan. The newly cured tobacco leaves will be stacked and stored for a certain period of time in the form of cigarette packs or boxes in the original tobacco turnover warehouse. Tobacco leaves processed in the silk workshop of the cigarette factory also have the problem of long-term stacking and storage. After long-term ...

AI Technical Summary

Problems solved by technology

When the external environment changes, the correspondence between the evacuation temperature and pressure fluctuates. During the operation of the equipment, the pressure has reached the standard requirements, but the temperature setting value is at or outside the evacuation limit critical point, the equipment will continue to evacuate, resulting in the operation of the equipment. The lengthening of the cycle, one is to cause the process to break the material or the supply is insufficient, and the other is to waste energy and increase the processing cost

③Because there is a certain hysteresis in temperature detection, the process is delayed at each node, resulting in unnecessary stays at process nodes, which also leads to waste of working media and energy, and increases processing costs

④The temperature control method has excessive vacuum rehydration processing, which causes the moisture content of the surface tobacco leaves to be too large, and even water-stained tobacco and steamed sheet tobacco appear, which makes part of the pressed oily smoke stand out. If it is too large, the moisture content will be divided into two levels, and the coefficient of variation of moisture at the inlet of subsequent processing equipment is large, and the processing effect is not ideal, which seriously restricts the level of homogenization processing.

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