High wet modulus viscose fiber coagulating bath processing assembly line

Abstract

The invention relates to a high wet modulus viscose fiber coagulating bath processing assembly line which comprises flashing equipment and crystallization equipment. The flashing equipment is connected with the crystallization equipment, the flashing equipment comprises an evaporation chamber, a heat exchanger chamber, a mixing condenser, a salt slurry pump, a steam jet pump and a water ring vacuum pump. The steam jet pump comprises a plurality of evaporators which are connected in series, the heat exchange chamber comprises a secondary steam heating exchanger and a final heat exchanger, the last evaporator inlet is connected with the coagulation bath inlet, the outlet of the first evaporator is connected with the secondary steam heating exchanger, the mixed condenser and the inlet of the salt slurry pump, the outlet of the secondary steam heating heat exchanger is connected with the inlet of the final heat exchanger and the inlet of the mixed condenser, the outlet of the mixed condenser is connected with the inlet of the steam jet pump, the outlet of the final heat exchanger is connected with the inlet of the last evaporator, the outlet of the steam jet pump is connected with the inlet of the water ring vacuum pump, and the exhaust port of the water ring vacuum pump is communicated with the atmosphere. The high wet modulus viscose fiber coagulating bath processing assembly line is compact in structure, low in cost, and capable of meeting production requirements, and no external discharge coagulation bath is needed.

Description

technical field [0001] The invention relates to a production and processing line for a coagulation bath required for spinning and forming of regenerated cellulose fibers, so as to meet the production process control requirements of the coagulation bath for spinning and forming, and to stabilize the content of each component in the coagulation bath for tow forming. Background technique [0002] High wet modulus viscose staple fiber is a kind of differentiated viscose fiber. It is a new generation of viscose fiber, which belongs to the variable fiber of supramolecular structure and morphological structure. It has higher strength, Viscose fibers with lower elongation and bulking, higher wet strength and wet modulus, because of the high wet modulus, the dimensional stability of the fabric is also good. In addition, high wet modulus fibers can be purely spun or blended with combed cotton, and blended with polyester, wool or acrylic fibers can achieve good results and are comforta...

AI Technical Summary

Problems solved by technology

[0003] The production of high wet modulus fiber is currently based on the original ordinary viscose staple fiber by changing the viscose composition and spinning conditions, adding denaturants, etc., but because the process is based on the original ordinary viscose staple fiber Implemented on the production line, the coagulation bath required for high wet modulus fiber forming cannot fully meet the balance requirements of the production process

In the actual production process, in order to meet the needs of production process control, a part of the coagulation bath is usually discharged regularly. Since the coagulation bath contains chemical raw materials required for normal production such as sulfuric acid and heavy metals, the direct discharge of the coagulation bath not only causes environmental protection. The pressure has also caused an increase in production costs, which is not conducive to the large-scale production of high wet modulus viscose fibers.

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