Development of technological line for obtaining flax trust
DOI:
https://doi.org/10.31548/energiya2020.04.078Abstract
Abstract. The intensification of one of the most energy-intensive processes - the process of drying the material - contributes both to the creation of energy-saving technologies for processing crop products, and to solving the problem of obtaining dried material of a given quality.
The purpose of this study is to develop energy and resource-saving technology for industrial preparation of linen trusts.
Previous studies have shown that extracting flax stalks with water before the lobe stage helps to reduce the time before the main phase of fermentation of pectin. The effect of hydrothermal treatment on the next impregnation increases with increasing temperature, especially sharply this increase occurs at temperatures above 60 0C.
As a result of research, a thermobiological method of flax stem lobe was developed, which is the basis of a technological line combining the processes of flax straw lobe, washing, deodorization and drying of the obtained flax trust, followed by its hydrothermal treatment.
The line operation mode is discrete-continuous. Processing of raw materials is carried out in the containers of a special design providing immersion of raw materials in liquid and its movement on technological operations. After loading, the container is placed in the tank of the first hydrothermal treatment, where it is in heated water at a temperature of 90 ... 95 0C. Next, the soaked raw material is reloaded into the tank of the second hydrothermal treatment to stop the microbiological process and high-quality washing of the material in heated water at a temperature of 50 ... 70 0C. Due to the intensification of the process 3 ... 5 times due to the creation of appropriate aerodynamic and thermal humidity modes, the three-tier conveyor unit is modernized into a single-belt one, in the last zones of which the linen trust is brought to conditioned humidity by steam-air treatment.
Experimental-industrial inspection of the technological line showed that the total duration of the main process is reduced by 1.5 ... 2 times, the specific costs of heat, electricity, water are reduced (by 20 ... 30%) and the yield of long fiber is increased by 0.5 .. 1.0%) with the improvement of its quality indicators, the degree of mechanization of technological operations increases.
Key words: linen trust, hydrothermal treatment, conveyor dryer
References
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