This equipment is specifically designed for the pretreatment of wastewater evaporation systems. Common problems encountered by evaporation concentration processes (such as MVR, multi-effect evaporation, and atmospheric pressure evaporation) when treating high-concentration organic wastewater include: coking of organic matter on heating surfaces, scale buildup leading to decreased heat exchange efficiency, foaming causing mist entrainment, and viscous concentrate clogging pipelines, severely impacting the evaporation equipment's operating cycle and processing capacity.

This system employs electrochemical oxidation technology to pre-treat organic matter, prevent scale buildup, and inhibit foaming before wastewater enters the evaporator. This effectively reduces the evaporation load, extends cleaning intervals, and reduces the amount of defoamer and scale inhibitor required. No chemical reagents are added throughout the process, and no additional salt or secondary pollution is introduced.

Common problems in evaporation and the role of electrochemical pretreatment

Common problems in evaporation	The role of electrochemical pretreatment:
Organic matter coking and scaling on heat exchange surfaces	Electro-oxidative decomposition of macromolecular organic matter, reducing coking tendency
Severe foaming of wastewater, with entrainment of mist	Electro-oxidative decomposition of surfactants, significantly reducing foaming
High-COD wastewater becomes viscous and clogged after concentration	COD removal rate of 60%~90%, reducing concentrate viscosity
Hardness ion scaling	Electrode action can inhibit crystal precipitation and deposition (better when combined with softening)
High mother liquor treatment costs	Reduces organic load, reduces concentration factor, and extends evaporation run time

Working principle

Wastewater, after pre-filtration, enters the circulating water tank and is then pumped into the electrochemical reactor. Under the action of the electrodes:

Electro-oxidation: Strong oxidizing groups (hydroxyl radicals, OH, etc.) are generated at the anode, breaking down large organic molecules, significantly reducing COD and wastewater viscosity, and decreasing coking material.

Scale/Deposition Prevention:The electrode environment on the electrode surface alters the crystallization behavior of scale-forming ions in the solution, inhibiting the deposition of inorganic salts and organic scale on subsequent heating surfaces.

The treated clarified liquid enters the evaporation system (MVR, multi-effect evaporation, submerged combustion evaporation, etc.), significantly improving scaling, coking, and foaming phenomena in the evaporator..

Core advantages (for evaporation pretreatment)

Advantages	illustrate
Reduced COD load	COD removal rate of 60%~90%, reducing viscosity and hazardous waste volume of evaporation concentrate, and in some operating conditions, mother liquor volume reduction of more than 50% can be achieved.
Inhibits coking and scaling	Electro-oxidation decomposes coking precursors, the electrode environment inhibits the formation of inorganic scale, and extends the evaporator cleaning cycle by several times.
Reduces foaming	Effectively decomposes surfactants, significantly reduces foam height in the evaporator, and reduces or completely replaces defoamers.
No chemical introduction	Without adding flocculants, scale inhibitors, or defoamers, and without increasing the salt content of evaporation residue, the condensate water quality is higher.
Electrode non-scaling and non-clogging	The electrode module remains clean over a long period of time, the electrodes are not consumed, and the lifespan is long.
Fully automatic operation	PLC control, touch screen operation, remote monitoring capability, enabling unattended operation.

Technical specifications (customizable)

parameter	scope
Processing capacity	0.5 ~ 100 m³/day (matching evaporator feed flow rate)
Installed power	5 ~ 150 kW (depending on COD concentration and throughput)
Operating voltage	0 ~ 20 V (adjustable)
COD removal rate	60% ~ 90%
Equipment material	PPH / PE / Stainless Steel / Titanium Alloy

Applicable pretreatment scenarios before evaporation

MVR or multi-effect evaporation influent: High-salt, high-organic wastewater (chemical, pharmaceutical, printing and dyeing, landfill leachate, etc.)

Submerged combustion evaporation (SCE) pretreatment: High-concentration organic wastewater, leachate concentrate

Ambient pressure evaporation crystallization system pretreatment: Electroplating wastewater, circuit board wastewater, desulfurization wastewater

Concentrated brine evaporation pretreatment: Membrane concentrate, pre-concentration section of zero-discharge projects

Why choose us?

Process Matching Experience: Specifically designed for evaporation pretreatment, successfully integrated with numerous MVR and multi-effect evaporator users.

Customizable Power Supply and Electrodes: Optimal current/voltage parameters matched to wastewater COD and conductivity.

Small-Scale Testing Support: Water sample testing and laboratory trials provided to clarify pretreatment effects before equipment customization.

Complete Unit Supply: Includes pre-filtration, electrochemical reactor, power supply, circulating water tank, and PLC control cabinet; simply connect piping for immediate operation.

Global Technical Support: Remote commissioning and online guidance available; rapid supply of key spare parts.

Tags:

Water Treatment Plant Pharmaceutical Industry

Industrial Wastewater Equipment

Chemical Wastewater Treatment Plant