UA73010C2 - Method of improving the filling capacity of tobacco - Google Patents

Abstract

The invention relates to a method for improving the filling capacity of tobacco, such as cut tobacco leaves or ribs, by treating the tobacco material comprising up to approximately 30 wt. % initial humidity with a treatment gas consisting of nitrogen and/or argon at pressures of between 50 and 1000 bars, during continuous or graduated compression followed by continuous or graduated decompression. The compression and decompression is carried out either in an autoclave or in several autoclaves arranged in the form of a cascade. The invention is characterised in that the thermal aftertreatment of the extracted tobacco material is carried out by means of a flowing, heat-transferring medium consisting of a mixture of permanent gases and superheated steam, the proportion of permanent gas is kept constant at a value between 10 and 60 vol. %.

Description

Depending on the local pressure difference between the heat-carrying agent present in the circuit and the environment in the area of the loading sluice (1) and the unloading sluice (2), outside air is sucked in and the steam-air mixture is removed through the steam-air valve (3). Supply of superheated steam is carried out through the steam valve (4). The oxygen content in the heat-carrying agent is measured with the help of the probe (5).

By adjusting the steam valve (4) and the steam-air valve (3), the desired oxygen content can be set and thus a constant ratio between the permanent gas and the superheated steam can be maintained.

With the help of the example given below, the dependence of the filling on the proportion of permanent gas in the heat-carrying agent is demonstrated. The proportion of permanent gas required in each case to achieve optimal filling depends on the type and humidity of the tobacco material used, as well as on the hardware boundary conditions.

Example

The final heat treatment of tobacco treated by the IMSOM method was carried out in a dryer according to

Fig.1. The supply of loaded tobacco is 1250 kg/h, and the volume consumption of the circulating heat-carrying agent, consisting of superheated steam and air, is 7315 mZ/h. Controlled by measuring the oxygen content, the share of permanent gas in the mixture was varied at constant heater power, respectively, by changing the oxygen content from 1.3, 7.5, and 1506.95, which corresponds to the permanent gas content of 6.5, 37, and 7506.90, respectively, and related to this counter change in temperature, measured before serving the tobacco, in the range from 185 to 16570.

The content of unloaded and prepared tobacco was determined using a densimeter

Borgwaldt (VogozhaidI) and the specific volume in ml/g were calculated at a given humidity of 12 mass.95 and a given temperature of 22"C. Based on the data of the basic experiment without permanent gas and the expanded sample obtained using a heat-carrying agent from steam and permanent gas, they were calculated relative improvement in capacity according to the formula:

Doyu-(Be-Ev) 10090/Ev, where Ev-: filling in the basic experiment; steam without permanent gas,

Ege content of loose tobacco; steam with permanent gas.

Diagram Fig. 2 illustrates the dependence of the volume of fluffed tobacco on the measured value of the oxygen content in the heat-carrying agent, as well as the possibility of establishing optimal technological conditions with the help of this measured value. spo of heat treatment of totin, saturated I prepare Myastkrtsokm bbhemas i she i i 1 I. -

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