The manner of constant unsticking of plant fibres and device for constant sticking of plant fibres

摘要

The invention concerns a process of continuous degumming of plant fibres and a device for continuous degumming of plant fibres. The process is characterised in that stalks of fibrous plants are soaked for a specified time in water with chemical agents added or without chemical agents added and the stalks are subjected to ultrasonic waves, and the straw which consists of stalks of fibrous plants is shaped in a form of band and it is fed to the technological process area by means of a continuous stream and moves through the area with a specified linear velocity; the area is divided into sections with each section having a separate water supply and the water flows through individual sections in a counter-current fashion with respect to the direction of the band movement, and the water circulates in a closed circuit. The band is subjected to ultrasonic treatment within each section. The temperature of water fed to individual sections should be between 15 and 40°C, and the water flow rate in individual sections should be between 5 to 30 running metres per minute with pH values between 5.5 and 7; the frequency of ultrasonic waves generated in each section should be between 15 and 30 kHz, the band movement speed through respective sections being between 0.1 and 0.3 m/hour. The device is characterised in that it has at least five vats (I) which form five sections; one above the other, drawing and pressing rollers (2) are positioned between the vats (Y); at the inlet to the first vat (Y) crushing rollers (3) are fitted and at the outlet from the last vat (I) collecting rollers (4) are mounted. Each vat (Y) which constitutes one section is equipped with a conveyor (10), acidity meter (9) and ultrasonic converter (U). Furthermore, vats (I) may be positioned in one plane parallel to the ground plane or in a plane which descends or rises stepwise at an angle of 3 to 5° with respect to the ground plane.