The invention relates to a treatment process for expanded tobacco stems, and belongs to the technical field of main material and auxiliary material
processing in the
tobacco industry. The
microwave expanded tobacco stems are classified according to the thickness and / or the length, the expanded tobacco stems are placed into a
pressure vessel,
nitrogen with the purity being larger than 78% is connected into the
pressure vessel, the tobacco stems and the
nitrogen are evenly mixed, the pressure in the vessel is normal pressure to 8 MPa, the pressure is kept for 10 seconds to 40 minutes, the
nitrogen in the
pressure vessel is exhausted, the nitrogen can be recycled after purification and compressing treatment, the expanded tobacco stems
after treatment are taken out, and the expanded tobacco stems are boxed or bagged in a classified mode for standby application; or
moisture regain is conducted directly, so that products such as stem shreds, stem strip shreds and stem particles are manufactured. The
microwave expanded tobacco stems treated through the process do not need to be stored any more, wooden odors and offensive odors in the tobacco stems are reduced, the tobacco stems cannot retract after
moisture regain, and good elasticity and
processing resistance are achieved. By means of the treatment process for the expanded tobacco stems, the requirement for the conditions such as warehouse space, manpower and logistics in the storage link is met, and therefore enterprise cost is greatly lowered.