Defoaming process and system for producing regenerated cellulose based on low-temperature alkali urea method

The invention discloses a defoaming process and system for producing regenerated cellulose based on a low-temperature alkali urea method, pulp porridge dissolved with fibers is fed into a vacuum degassing tank to remove gas and then is fed into a low-temperature extruder to prepare cellulose colloid, the vacuum degassing tank adopts a sealed tank body with a stirring device, the stirring speed of the vacuum degassing tank is controlled to be 30-50r/min, and the stirring speed of the vacuum degassing tank is controlled to be 30-50r/min; the degassing temperature is 20 to 30 DEG C, the degassing pressure is 20 to 40 mbar, and the degassing time is 20 to 30 minutes. The colloid defoaming device not only solves the defects existing in the process route of colloid defoaming in the existing low-temperature alkali urea method, but also has the advantages of low control difficulty, simple structure, improvement of subsequent filtering and spinning process properties and the like, and is particularly suitable for indu