Descaling process for oilfield produced water

The invention discloses a descaling process for oilfield produced water, which comprises the following steps: pumping oilfield produced water into an ion trapping stirring tank, and adding a natural mineral adsorbent to complete trapping of scaling ions by natural minerals; then pumping into a mineral collecting and stirring tank, and adding a mineral flotation collecting agent to finish the collection of natural minerals by the mineral flotation collecting agent; pumping into flotation separation equipment, introducing air, and finishing flotation of minerals loaded with scaling ions by utilizing the mineralization effect of microbubbles and the foam flotation effect, so as to remove the scaling ions in the oilfield produced water; and pumping the oilfield produced water subjected to flotation separation treatment into a reinjection water system, wh foam scum produced by flotation separation equipment contains natural minerals and is recycled after being regenerated or transported outwards after being subjec