Bast fiber degumming preprocessor and bast fiber degumming preprocessing method

Abstract

The invention discloses a bast fiber degumming preprocessor and a bast fiber degumming preprocessing method, and relates to production technology for producing bast fibers, in particular to a bast fiber degumming preprocessing method and special equipment. The bast fiber degumming preprocessor comprises a feed box, a cylinder, and an enclosed cover. The upper part of the enclosed cover is fixed on an electric hydraulic lifting device; a feed box bracket is fixed on the lower part of the enclosed cover; a vacuum pump is arranged outside the cylinder; and a steam pipeline is arranged outside the cylinder to be communicated with the cylinder. The bast fiber degumming preprocessing method comprises the following steps of: 1) immersing bast raw materials into raw material treating fluid, and introducing steam; 2) starting the vacuum pump to pump air from the cylinder to form negative pressure, switching on an air valve, filling air, and repeating for three to five times; and 3) pushing out the feed box for the next working procedure, and finishing the pretreatment work of the raw materials. The bast fiber degumming preprocessor and the preprocessing method have the advantages of high efficiency, good effect, low energy consumption and water consumption, small pollution, and simple and convenient device operation, and provide good early preparation for the next degumming process.

Description

technical field [0001] The invention relates to a production process of bast fiber, in particular to a bast fiber degumming pretreatment method and special equipment. Background technique [0002] Bast fibers in nature exist in the bast layer of plants and are bound by pectin, hemicellulose, lignin, fatty wax and other colloids. Biological and chemical means must be used to remove the colloids and extract fibers. Currently disclosed bast fiber degumming process, such as common bast long fiber ramie chemical degumming, the pretreatment process that usually adopts before degumming is acid leaching, is about to pack the raw ramie into a cage, and the sulfuric acid concentration is 4-6g / L, bath ratio 1: 8-10, temperature is soaked in the solution of 60-80C ° for 60-120 minutes, then carries out alkali boiling. The method consumes a lot of acid, has uneven effects on the raw materials, and repeats high-temperature alkali cooking in the subsequent process, which easily destroys ...

AI Technical Summary

Problems solved by technology

However, the current biological degumming process is usually directly inoculated with degumming bacteria without pretreatment of raw materials. Although different strains have different requirements for process conditions such as temperature and pH value, generally speaking, the degumming process takes about 15-24 hours. The cycle is long, the consumption of electricity and coal is large, the enzyme activity rate is subject to high environmental conditions, and the survival rate is affected. The degumming agent cost and equipment investment are high, and because the degumming is not complete, chemical refining is still needed, and it has not been widely accepted by enterprises.

For the degumming process of short bast fibers such as mulberry fiber, whether it is a combination of biological, chemical or biochemical methods, the known pretreatment process is to soak the raw materials in warm water for as long as 24-48 hours, and the production cycle is long. , low efficiency, large space occupation, high cost of manual handling, high labor intensity, unfavorable for large-scale production

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