What is the working principle of hydrogen peroxide coalescer
Information summary：The core of the hydrogen peroxide coalescer is liquid-liquid coalescence separation, which achieves efficient removal of trace water or organic phases in the hydrogen peroxide system through three steps of "coalescence filter capture small droplet coalescence gravity/interception separation". It is commonly used in production scenarios such as oil-water separation of residual liquids and purificat
The core of the hydrogen peroxide coalescer is liquid-liquid coalescence separation, which achieves efficient removal of trace water or organic phases in the hydrogen peroxide system through three steps of "coalescence filter capture small droplet coalescence gravity/interception separation". It is commonly used in production scenarios such as oil-water separation of residual liquids and purification of dilute products. Here are the detailed principles and processes:
1. Core principles
Based on surface wetting, capillary condensation, and gravity settling, utilizing the hydrophilic/hydrophobic properties of the aggregation medium, dispersed phase small droplets (usually 0.1 μ m level) adhere, collide, and fuse on the surface of the filter material to form large droplets (millimeter level), and then achieve two-phase separation through gravity or separation filter cartridge. The entire process is a physical process, without chemical reactions, and does not change the main properties of hydrogen peroxide.
2. Detailed workflow
(1) Preprocessing and feeding
Hydrogen peroxide (or working fluid) containing trace amounts of water or organic phase enters from the lower part of the equipment and first passes through the preliminary settling zone. Larger droplets are pre separated by gravity to avoid impacting the coalescence filter element; At the same time, the temperature can be controlled through insulation pipes to prevent the decomposition of hydrogen peroxide or changes in viscosity from affecting the agglomeration efficiency.
(2) Agglomeration filter capture and coalescence
The material enters the aggregation filter element, which is made of surface modified polymer or fiberglass filter material. Hydrophilic or hydrophobic materials are selected according to the system: hydrophilic filter element is used to capture trace water droplets when treating hydrogen peroxide dehydration; Use a hydrophobic filter element to capture oil droplets when removing oil from the residual liquid. Small droplets adhere to the pores of the filter material through capillary action, collide and fuse to form large droplets, detach from the surface of the filter element, and enter the separation chamber.
(3) Separation and discharge
After coalescence, the large droplets are separated in the separation chamber by gravity settling (with higher water phase density downwards and lower oil phase density upwards) or interception by a separation filter. The purified hydrogen peroxide is discharged from the upper part of the equipment, and the separated water or oil phase is discharged from the bottom collection port to complete the purification of the system.
3. Key points
The agglomeration efficiency depends on the filter material material, pore size gradient, fluid flow rate, and temperature, and needs to be matched with the physical properties of the hydrogen peroxide system (such as surface tension and viscosity) to avoid emulsification or droplet fragmentation.
Unlike catalytic decomposition equipment, hydrogen peroxide coalescers only perform physical separation and do not involve chemical decomposition of hydrogen peroxide, which can protect product concentration and activity.
4. Typical Applications
Mainly used for oil-water separation of residual liquid in hydrogen peroxide production, dehydration of dilute hydrogen peroxide, purification of working fluid, it can protect downstream reactors and heat exchangers, reduce energy consumption and solvent loss, and improve product purity.
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