Liquid circulation processing device and method for bast fibers

Abstract

The invention relates to a liquid circulation processing device and a liquid circulation processing method for bast fibers. The method comprises the following steps of: 1) hanging the bast fibers or yarns in bunches on an extension bar of a yarn hanging device in parallel; 2) serially connecting a plurality of yarn hanging devices, and putting the yarn hanging devices in a main vat; 3) adding chemical agents into the main vat through an auxiliary vat, and opening a main pump and a heat exchange device; and 4) after treatment fluid is pumped into a hollow column of each yarn hanging device, spraying the treatment fluid on the bast fibers or yarns through holes on each extension bar and spraying holes on each extension bar. The device used by the liquid circulation processing method for the bast fibers and yarns is characterized by comprising a barrel-shaped main vat; the yarn hanging devices are arranged inside the main vat; the main pump is arranged outside the main vat; a water inlet of the main pump is connected with a water outlet of the main vat; a water outlet of the main pump is connected with the heat exchange device; a water outlet of the heat exchange device is connected with a water inlet of each yarn hanging device inside the main vat; and the auxiliary vat is arranged outside the main vat. The liquid circulation processing device and the liquid circulation processing method for the bast fibers can be widely applied to degumming, washing, bleaching and dyeing the bast fibers, scouring, dyeing, bleaching and washing the yarns, and other processes.

Description

Technical field [0001] The invention relates to a bast fiber processing device and method, in particular to a bast fiber liquid circulating processing device and method. Background technique [0002] When traditional hemp bast fiber is processed by degumming, washing, softening, bleaching or dyeing, it is often necessary to put the bast fiber into a tank with a treatment liquid for processing. There are two main ways to load bast fiber in the cylinder: one is to set a hollow shaft, the hollow shaft is full of water spray holes, and the hollow shaft is provided with radial extension rods to carry the bast fiber. After being folded many times, it is hung on the extension rod; the other is to disperse the bast fiber in a processing tube with a central axis, and press it evenly through a yarn press. [0003] The problems with the former method are: 1. Because the water jets from the inside to the outside, in order to spray water through the multilayer bast fiber, a lot of water pressu...

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Problems solved by technology

[0003] The problems in the former method are: 1. Since the water flow is sprayed from the inside to the outside, a large water pressure is required to spray the water through the multi-layer bast fibers. Even so, the water flow often occurs during processing. Unfavorable, incomplete processing and uneven water supply; 2. If a water spray device is installed above, the water flow will circulate liquid from top to bottom, because there are many pores between the bast fibers of each layer, there will often be liquid Short circuit, uneven processing of bast fibers; 3. This loading method makes bast fibers very messy after processing, which affects subsequent processing, and at the same time, the scattered fibers will affect the yarn hanging device and the filter at the bottom of the cylinder, etc. Form blockage, difficult to clean, resulting in poor circulation, directly affecting production efficiency

[0004] The problems of the latter method are: 1. The liquid circulation often only circulates from the inside of the shaft tube to the outside or from the outside to the inside. Although the fiber is more convenient to load, due to the problem of uneven liquid penetration, it will lead to uneven fiber processing. 2. Due to the difference in density between the upper and lower layers of the fiber layer, it will also lead to uneven processing; 3. This loading method will also make the bast fibers messy and cannot be kept straight, which will bring more difficulties to subsequent processing.

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