Tobacco shred fast shaping and drying method

Abstract

The invention discloses a tobacco shred fast shaping and drying method, which comprises the following steps of A, tunnel temperature increase and humidification treatment: cut tobacco shreds are conveyed into HT tunnel temperature increase and humidification equipment through a vibration tank; the tobacco shreds are subjected to temperature increase and humidification treatment by steam with the temperature of 120 to 130 DEG C and the pressure of 7.0 to 8.0 bar; the water content of the tobacco shreds subjected to temperature increase and humidification treatment is 26 percent to 28 percent; B, airflow constant speed drying treatment: the tobacco shreds subjected to temperature increase and humidification treatment are guided into an airflow drying machine; the drying hot air temperature is controlled to be 135 DEG C to 145 DEG C, so that the tobacco shreds fast dehydrate and expand; the water content of the dehydrating and expanding tobacco shreds is 15 percent; C, microwave drying and shaping treatment: the tobacco shreds subjected to airflow drying are guided into microwave drying equipment; the opening proportion of a microwave magnetron is regulated to 85 percent; the water content of the outlet tobacco shreds is set to be 12 percent; the tobacco shreds advance in a microwave drier along the same path; microwave energy is uniformly absorbed; the fast shaping of the tobacco shreds is completed. The tobacco shred fast shaping and drying method has the advantages that the tobacco shreds can realize fast dehydration, expansion and shaping; meanwhile, the filling value of the baked tobacco shreds and the content of fragrance substances in the tobacco shreds are improved.

Description

technical field [0001] The invention relates to the technical field of tobacco processing, in particular to a rapid shaping and drying method for shredded tobacco by drying shredded tobacco in stages. Background technique [0002] Tobacco drying is a key process in cigarette processing, which has a significant impact on the physical and sensory quality of cigarettes. At present, the drying processes widely used by domestic cigarette companies include drum drying and airflow drying. The wall temperature of drum drying is generally around 130°C. After drying, the aroma substances of shredded tobacco are well preserved, but due to the slow drying speed, the expansion effect of shredded tobacco is poor, and the filling value after drying is low; the temperature of air drying medium is generally 160°C-260°C. Cut tobacco rapidly dehydrates and expands and curls during the drying process, but it cannot be shaped well, which will have an adverse effect on the filling performance of...

AI Technical Summary

Problems solved by technology

The wall temperature of drum drying is generally around 130°C. After drying, the aroma substances of shredded tobacco are well preserved, but due to the slow drying speed, the expansion effect of shredded tobacco is poor, and the filling value after drying is low; the temperature of air drying medium is generally 160°C-260°C. Cut tobacco rapidly dehydrates and expands and curls during the drying process, but it cannot be shaped well, which will adversely affect the filling performance of cut tobacco

In addition, studies have shown that in the process of processing medium and high-grade shredded tobacco, when the temperature of the shredded leaves exceeds 100°C, the aroma quality in the shredded leaves will deteriorate, and the amount of aroma will decrease. The existing drying methods are difficult to solve the contradiction between the expansion of cut tobacco and the preservation of aroma substances

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