CN
CN
MENU

Product Center

Green Innovation · Scientific and Technological Development · Industrial Responsibility · Joint Construction of Civilized Ecology

Electric flocculation device

The electrocoagulation device is widely used in various industrial wastewater treatment projects such as electroplating, printing and dyeing, chemical, pharmaceutical, petroleum and petrochemical, papermaking, leather making, food processing, smelting, coal containing wastewater, garbage leachate, as well as municipal sewage treatment plant pretreatment or deep purification, reclaimed water reuse engineering, polluted surface water and groundwater purification, etc. It is particularly suitable for treating complex wastewater with high concentration, high chromaticity, difficult to degrade, heavy metal and emulsified oil that is difficult to treat by conventional physicochemical and biochemical methods.

National Service Hotline：400-611-6861
Product Introduction

The electrocoagulation device is a water treatment equipment based on electrochemical principles, which uses soluble metals such as aluminum and iron as anodes. Under the action of direct current, metal ions are generated through electrode reactions, which are hydrolyzed and polymerized to form multi-core hydroxyl complexes with strong adsorption ability. The colloidal particles are stabilized and condensed, and pollutants are removed through anodic oxidation, cathodic reduction, and electrolysis to produce fine bubbles. The product types include traditional plate and frame electrocoagulation reactors, high-voltage pulse electrocoagulation equipment (high voltage and low current), electrocoagulation air flotation integrated equipment, vertical cylindrical reactors, and modular closed reactors. The equipment mainly consists of an electrolytic reaction chamber, an electrode plate group, a DC power supply or pulse power supply, a stirring system, a precipitation separation unit, and a PLC control system. This device integrates electrolytic oxidation, electrolytic reduction, electrolytic flocculation, and electrolytic air flotation, and the entire reaction process does not require the addition of additional chemical flocculants.

Technical Advantage
Simultaneous removal of multiple pollutants
integrating oxidation, reduction, flocculation, and air flotation, for heavy metals, color, oil, and other pollutants COD、 Suspended solids and other pollutants have broad-spectrum removal ability.
High processing efficiency
The reaction residence time is short (usually 10-60 minutes), and the processing efficiency is higher than traditional chemical coagulation methods. The COD removal rate can reach over 50%, the SS removal rate can reach over 90%, and the heavy metal ion removal rate can reach over 95%.
High processing efficiency
The reaction residence time is short (usually 10-60 minutes), and the processing efficiency is higher than traditional chemical coagulation methods. The COD removal rate can reach over 50%, the SS removal rate can reach over 90%, and the heavy metal ion removal rate can reach over 95%.
Low energy consumption
By using high-voltage pulse or bipolar connection technologies, the water consumption per ton of water can be reduced by 75% to 90% compared to traditional electrocoagulation devices, and the operating cost is only half or even lower than traditional processes.
Low energy consumption
By using high-voltage pulse or bipolar connection technologies, the water consumption per ton of water can be reduced by 75% to 90% compared to traditional electrocoagulation devices, and the operating cost is only half or even lower than traditional processes.
High degree of automation
PLC fully automatic control, easy to operate, can achieve remote adjustment and monitoring.
Strong adaptability
It has a strong ability to adapt to changes in raw water quality and quantity, and can be adjusted through module combinations according to wastewater conditions.
Process Selection

1. Selection based on water quality: For wastewater containing heavy metals, iron plate electrode electrocoagulation devices are preferred for low treatment costs and good results; Aluminum plate electrodes are used for oily wastewater and high chromaticity wastewater, with dense flocs and excellent air flotation effect; The use of pulse power electric flocculation device for difficult to degrade organic wastewater has stronger oxidation ability.

2. Selection based on processing scale: For small-scale projects or emergency treatment with a daily processing capacity of less than 100m ³, an integrated mobile electrocoagulation device should be selected; For medium-sized projects with a daily processing capacity of 100-1000m ³, modular continuous flow devices are selected; For large-scale projects with a daily processing capacity>1000m ³, multiple sets of parallel large-scale electrolytic cell systems are used.

3. Selection by processing stage: As a pretreatment unit, it is used to remove heavy metals, oils, and suspended solids, reducing the burden of subsequent biochemical treatment; As a deep processing unit, it is used to remove residual COD, chromaticity, and total phosphorus from biochemical effluent; As an emergency response unit, it is used for rapid disposal of sudden water pollution incidents.

4. Selection based on process combination: For high concentration organic wastewater, a combination process of "electrocoagulation+biochemical treatment" should be used; Chromium containing wastewater needs to undergo reduction reaction before electrocoagulation; Projects with high effluent requirements can adopt a combination process of "electrocoagulation+filtration" or "electrocoagulation+activated carbon adsorption".


Equipment Selection

Parameter Description and Selection Points

The processing capacity of a single device ranges from laboratory level (10-20L/h) to medium to large scale engineering (5-720m ³/d), and can be selected according to the design water volume. Multiple groups can be connected in parallel for expansion in a modular manner

Equipment type: Industrial integrated (fixed installation, suitable for factory wastewater treatment); Mobile/pry mounted (vehicle mounted, emergency response, rapid deployment); Experimental platform type (small or medium scale trial). The technical parameters of a mobile electrocoagulation equipment are shown in the table below

Typical model and technical specifications (mobile electrocoagulation equipment) ECTI-EPW-205 (processing capacity 5m ³/h, installed power 32kW); ECTI-EPW-210 (processing capacity 10m ³/h, installed power 52kW); ECTI-EPW-220 (processing capacity 20m ³/h, installed power 72kW). Operating pressure 0.2MPa, operating temperature 5-40 ℃. Inlet water quality requirements: pH 3-12, COD ≤ 1500mg/L, SS ≤ 5000mg/L, chromaticity ≤ 500, turbidity ≤ 1200NTU; Effluent indicators: COD ≤ 200mg/L, SS ≤ 200mg/L, chromaticity ≤ 10, turbidity ≤ 20NTU. The external dimensions are 9400 × 2400 × 2700mm.

The electrode plate materials include aluminum (Al), iron (Fe), aluminum iron composite materials, etc., selected according to the characteristics of the wastewater. Aluminum electrodes are suitable for heavy metals and acidic wastewater, while iron electrodes have higher electrochemical activity

The main material is carbon steel anti-corrosion (under normal working conditions, with lower cost); 304/316L stainless steel (for strong corrosion conditions and food grade requirements); PP/fiberglass (strong acid and alkali working conditions)

Power type: ordinary DC power supply (voltage adjustable from 0 to 50V); High voltage pulse power supply (voltage<500V, current<50A), adjustable pulse frequency. Choosing high-performance power sources can significantly improve electrical conversion efficiency and reduce electrode passivation rate

The reactor structure is plate and frame type (electrode plates arranged in parallel, mature structure); Concentric column type (strong water flow erosion ability on the electrode plate, uniform current distribution, which can slow down electrode passivation); Modular enclosed structure (columnar enclosed structure, reduces footprint, safe and reliable)

The electrode polarization/passivation suppression scheme includes regular polarity reversal (programmable automatic polarity switching), high-frequency pulse power supply, and mechanical stirring (with stirring blades installed between the plates), which can be used in combination

The supporting system should be equipped with pH automatic adjustment system (inlet/outlet pH monitoring), sedimentation separation unit (or air flotation unit), sludge dewatering device, flow meter and conductivity meter, as well as PLC fully automatic control system, with remote monitoring capability


Installation methods include fixed foundation installation (for large-scale projects), modular integration (for small and medium-sized projects, compact footprint), and vehicle mounted mobile installation (for emergency response). The basic levelness error of the equipment is ≤ 2mm/m, and the sealing of the inlet and outlet water pipes is reliable

Operation monitoring requires online monitoring of key parameters such as pH, conductivity, flow rate, electrolysis voltage, and current of incoming and outgoing water. Regularly monitor water quality indicators such as COD, heavy metals, and chromaticity, and adjust operating parameters in a timely manner according to changes

Regularly inspect the wear of electrode plates for maintenance and management (usually every 3-6 months); Regularly replace according to the electrode loss situation (the lifespan of aluminum electrodes is about 6-12 months, and the iron electrode loss rate can be estimated by the iron electrode loss of 0.55kg/m ³); Regularly clean the sediment at the bottom of the reactor; The electrical system needs to maintain good insulation and grounding protection. Note: The electrode replacement cycle is greatly affected by the corrosiveness of water quality and current density. It is recommended to determine it based on actual operating conditions

Adhere to relevant standards such as T/CAAPI 43-2022 "Technical Regulations for Electric Flocculation Wastewater Treatment", T/CZRX 0124-2025 "Design Specification for Electric Flocculation Water Treatment Equipment", and GB 50014-2021 "Design Standard for Outdoor Drainage"


Friendship Link
Huapu Environmental Protection Huapu Water Treatment Equipment