Chemi-mechanical pulp wastewater treatment technology and device with coupled membrane separation and evaporation

The invention relates to the field of comprehensive treatment of pulping wastewater, in particular to a treatment technology of chemi-mechanical pulp wastewater treatment of coupled membrane separation and evaporation and reuse of produced water of various sections for working sections suitable for production. Firstly, chemi-mechanical pulp wastewater runs through a grating, massive scum and debris are removed to product a pump and to guarantee the safety of subsequent operation, through step-by-step filtering of air flotation or sedimentation, microfiltration, ultrafiltration, nanofiltrationand reverse osmosis, the produced water is reused for the sections suitable for production of workshop chemi-mechanical pulp, and concentrate is subjected to evaporation or biological treatment, so that the purposes of wastewater treatment and reuse are achieved. 本发明涉及制浆废水综合处理领域。尤其涉及一种化机浆废水膜分离耦合蒸发处理，各段产水回用于生产合适工段的处理工艺。首先化机浆废水通过格栅去除大块的浮渣及杂物以保护泵及保证后续操作安全，通过气浮或沉降、微滤、超滤、纳滤、反渗透逐级滤过，产水回用于车间化机浆生产合适的工段，浓缩液进行蒸发或者生物处理，达到废水处理及回用的目的。