Method for preparing paper tube adhesive from printing and dyeing wastewater

The invention relates to the field of paper tube glue, in particular to a method for preparing paper tube glue from printing and dyeing wastewater. The invention relates to a method for preparing a paper tube adhesive from printing and dyeing wastewater, which comprises the following steps: (1) carrying out air floatation or resin adsorption on PVA-containing textile wastewater to reduce COD to less than 60mg/L, and then adding water or evaporating to control the mass fraction of PVA in the obtained solution to be 2-6%; (2) adding the solution obtained in the step (1) into a reaction kettle, heating to 95 DEG C or above, and keeping the temperature for 3 hours; and (3) cooling the reaction kettle to 60-70 DEG C, adding glyoxal, kaolin and starch, then adding hydrochloric acid, and controlling the pH value at 5-6 DEG C to obtain the paper tube adhesive. 本发明涉及纸管胶领域，具体涉及一种印染废水制备纸管胶的方法。本发明一种印染废水制备纸管胶的方法，包括如下步骤：（1）将含PVA的纺织废水通过气浮或者树脂吸附，降低COD至小于60mg/L，之后通过加水或蒸发，将得到的溶液中PVA的质量分数控制在2-6%；（2）将步骤（1）得到的溶液加入反应釜中，并热至95℃以上，并且