A clean production method of ramie fine-dried hemp
A ramie fine-drying and clean production technology, which is applied in the chemical post-treatment of fibers, textiles and papermaking, mechanical treatment, etc., can solve the problems of high waste water treatment cost, long degumming time, large waste water discharge, etc., and achieve the difficulty of process control Small size, less difficulty in wastewater treatment, and less wastewater discharge
Active Publication Date: 2018-03-27
山东恒丰新型纱线及面料创新中心有限公司
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Problems solved by technology
[0003] The main problem or deficiency of the production method of ramie fine-dried hemp of the prior art is that its degumming step needs to adopt relatively high concentration of NaOH (concentration is 1%), the degumming time of the whole degumming process is long (time about 5h), sodium sulfite component Easy to decompose at high temperature and release sulfur dioxide gas
Moreover, due to the high bath ratio of the degumming step, the amount of wastewater discharge is large; moreover, in the discharged wastewater, due to the high content of NaOH and sodium sulfite, subsequent wastewater treatment is more difficult and the cost of wastewater treatment is higher
Method used
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Effect test
Embodiment 1
[0057] The clean production method of ramie fine dry hemp comprises the following steps:
[0058] The first step, the softening step of raw hemp
[0059] Cut the raw ramie into 15cm-long pieces, place them in the dipping tank, and immerse them in warm water at 45-55°C for 30 minutes to soften the raw ramie;
[0060] The second step, steam explosion pretreatment step
[0061] The method of introducing steam and quickly releasing the pressure is used to clear the remaining air in the blasting chamber and the steam inlet and outlet pipelines, and to fully preheat the inner wall of the blasting chamber of the steam blaster;
[0062] Then, quickly put the softened raw ramie in the blasting chamber of the steam blasting machine, open the high-pressure steam supply valve to supply steam to the blasting chamber, and cut off the high-pressure steam supply after the steam pressure in the blasting chamber reaches 0.5-0.8MPa Valve, keep pressure for 3~5 minutes;
[0063] Then, quickly ...
Embodiment 3
[0081] For comparative example: adopt the steam explosion treatment method of prior art to produce ramie fine dry hemp.
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Abstract
The invention discloses a cleaner production method for degummed ramie. A degummed ramie product is produced by improving a chemical degumming process in the prior art, replacing caustic soda, anhydrous sodium sulfite and urea with sodium percarbonate and integrating a series of technical means such as softening of raw ramie with warm water, low-pressure steam explosion pretreatment and the like. The technical problems that the degumming time is long, process control is difficult, degumming efficiency is low, the use amount of alkali is large, the emission in the production process is high, waste water treatment is relatively difficult and the like with the adoption of existing methods are better solved. A cleaner production process is used, the colloid component contained in the raw ramie is completely removed, a good fiber dispersion effect is obtained, and components of hemicellulose and lignin in the raw ramie are effectively removed; a degumming process of the method is relatively mild, has small damage to physical performance indexes of ramie fibers and meets technical index requirements of first-grade degummed ramie GB / T 20793-2006.
Description
technical field [0001] The invention relates to a production method of fine-dried ramie hemp, in particular to a clean production method of dried ramie hemp, belonging to the field of textile industry. Background technique [0002] The production method of the ramie fine-drying hemp of the prior art, its process route is: ramie raw hemp sample preparation—one boiling (NaOH concentration 1%, time 1h, bath ratio 1:20)—washing—second boiling (NaOH concentration 1%, Hydrogen peroxide concentration 3%, NaSiO 3 Concentration 3%, sodium sulfite concentration 2%, urea concentration 3%, sodium tripolyphosphate concentration 3%, time 1h, bath ratio 1:20)—washing—dehydration—oiling—drying—finishing hemp. [0003] The main problem or deficiency of the production method of ramie fine-dried hemp of the prior art is that its degumming step needs to adopt relatively high concentration of NaOH (concentration is 1%), the degumming time of the whole degumming process is long (time about 5h), ...
Claims
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IPC IPC(8): D01B1/10D01C1/00
CPCD01B1/10D01C1/00
Inventor 韩光亭姜伟宋焱张元明李明华辛玉军
Owner 山东恒丰新型纱线及面料创新中心有限公司