Defoaming device for cellulose solution, and defoaming method of defoaming device

Abstract

The invention discloses a defoaming device for a cellulose solution, and a defoaming method of the defoaming device. The defoaming device comprises an outer barrel, a material barrel, a speed regulation device, a liquid inlet pipe and a material storage device, wherein the outer barrel is configured into a main body of the defoaming device; a liquid outlet is formed in the bottom of the outer barrel; the material barrel is arranged in the outer barrel and is provided with a through hole; the speed regulation device is used for driving the material barrel to make centrifugal movement; the liquid inlet pipe passes through the outer barrel and feeds a solution into the material barrel; the material storage device is communicated with the liquid outlet formed in the bottom of the outer barrel,and is arranged at the position lower than the outer barrel; a discharge device is arranged at the bottom of the material storage device. The defoaming device, which is simple in structure and easy to operate, for the cellulose solution has the characteristics of being high in defoaming efficiency, realizing continuous defoaming, and guaranteeing the continuous proceeding of the subsequent spinning; material conveying is not affected by a defoaming process, and efficient defoaming and continuous production are carried out at the same time; furthermore, the defoaming method is good in effect;the defoaming device for the cellulose solution can be used for producing a spinning solution with good stability and evenness, and does not produce gel.

Description

technical field [0001] The invention relates to a defoaming device for cellulose solution and a defoaming method for the device. Background technique [0002] Cellulose is insoluble in common solvents. The production process of regenerated cellulose fibers based on the traditional viscose method and copper ammonia method has been gradually replaced by the emerging solvent spinning technology due to complex procedures, heavy pollution and high energy consumption. Among them, the NMMO (N-methylmorpholine oxide) solvent method, the ionic liquid method and the low-temperature alkali / urea method are more promising. The production of cellulose fibers by the NMMO solvent method has been industrialized, but due to cost factors and some reasons of the fiber itself, the expansion of the production scale of the NMMO solvent method is restricted to some extent. Although ionic liquids are good solvents for cellulose, they have the disadvantages of high solution viscosity and high dissol...

AI Technical Summary

Problems solved by technology

The existing defoaming method not only takes a long time, but also the temperature in the device changes greatly, which can easily cause gelation, resulting in uneven uniformity of the spinning solution, and the defoaming effect is not obvious, and at the same time, the removal of air bubbles cannot be guaranteed. Efficiency and spinning solution quality are extremely unfavorable for continuous and large-scale production

[0009] The above factors greatly limit the industrial development of low temperature alkali / urea cellulose fiber

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