High efficiency and low energy consumption hemp biological degumming solid-liquid mixed ventilation fermenter

Abstract

The invention discloses a solid-liquid mixed ventilation fermentation cylinder for biological degumming of hemp with high efficiency and low energy consumption, and the fermentation cylinder comprises a tank, a cover, an outer circulating tube and a cover folding apparatus, the sidewall of the tank is provided with a tank sidewall interlayer heat exchange device, the bottom of the tank is provided with a sieve plate, the lower part of the sieve plate is provided with a coil heat exchanger, the outer circulating tube comprises a horizontally arranged transverse tube and a vertically arranged ascending tube, the ascending tube is sleeved with an ascending tube interlayer heat exchange device, and the bottom of the ascending tube is also provided with a nozzle. The outlet direction of the transverse tube at the top part of connection between the ascending tube and the tank is tangent with the tank. According to a space between the sieve plate and the pot bottom, the coil heat exchanger employs a multiple-loop arrangement. The fermentation cylinder can realize high efficiency gas-liquid mixing effect and shorten the fermentation period; the fermentation cylinder can improve gas-liquid mixing effect, and simultaneously effective reduces energy consumption; the fermentation cylinder improves heat exchange effect, effectively shortens time for heating and cooling during fermentation cylinder disinfection, and improves utilization rate of the equipment; the fermentation cylinder can reduce production cost in multiple aspects.

Description

[0001] Technical field [0002] The invention relates to the field of hemp fiber textiles, in particular to a high-efficiency and low-energy-consumption hemp biological degumming solid-liquid mixed aeration fermenter, which is suitable for the industrial biological degumming production of hemp, including ramie, hemp, jute, sisal, apocynum, bamboo, Biological degumming production of banana, mulberry fiber, etc. Background technique [0003] Various types of hemp include ramie, hemp, jute, sisal, apocynum, bamboo, banana, mulberry fiber, etc., which contain about 55-75% of cellulose, and about 25-45% Left and right non-cellulose (colloid) components, including lignin, hemicellulose, waxy lipids, pectin, and some water-soluble substances and ash. If the raw hemp has spinnability, these non-cellulose components must be removed to obtain a degummed and refined hemp, that is, the degumming process. It can be said that degumming is the key process to obtain spinnable hemp fibers, a...

AI Technical Summary

Problems solved by technology

The main problems of the chemical degumming method are as follows: first, the process is long, consumes a lot of raw materials and energy consumption, resulting in high production costs; second, the use of high-concentration acid, alkali, oxidant, etc., causes great damage to the fiber and poor fiber quality , so it is difficult to meet the requirements of spinning high-count yarn; the third is that the COD of degumming sewage produced C r can be as high as 15000-25000mg / mL, and BOD 5 / COD C r﹤0.3, it is very difficult to treat sewage. In order to meet the discharge standards, a large amount of diluted treatment is required, so the treatment cost is high, and it is difficult to meet the standards, so it will seriously pollute the environment

Although the previously designed fermentation tanks (Chinese patent ZL200810031073.1; Chinese patent ZL200810031074.6; Chinese patent ZL200820050874.1) have been successfully applied to the ramie biological degumming process, there are still some shortcomings, such as poor gas-liquid mixing effect , high energy consumption, poor heat exchange effect and many other defects

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