The chlorine-foam separation method is a new and efficient method for treating hydrazine hydrate wastewater. The hydrazine hydrate wastewater is spirally ejected through the nozzle in the foam separation column, and is in high-speed countercurrent contact with the air and chlorine gas from the top of the column in the vertical direction to form a large amount of pressurized gas.

The pressurized gas continuously increases and expands outward, and the gas entering the foam separation column, the division of the liquid and the formation of a large number of bubbles between the extruded gas and liquid. The high-speed jetted liquid is entrained and thrown toward the pipe wall, and then folded back into the center to contact the high-speed flowing airflow to form a new bubble. The continuous flow of gas and bubble layers will hinder the continued upward flow of the liquid. At the same time, the continuous flow of the liquid and the bubble layer will also hinder the continued downward flow of the gas. When the gas-liquid two phases reach equilibrium, the foam is separated. A stable foam layer is formed in the column, and a large amount of foam formed in the foam layer increases the mass transfer area between the gas and liquid phases.Moreover, the impact of the high-speed liquid ejecting and the gas-liquid two-phase squeezing rupture, so that the gas-liquid two phases can be separated, thereby achieving the purpose of hydration hydrazine wastewater treatment.

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