Spray painting wastewater treatment device

Spray painting wastewater treatment device

Spray painting wastewater treatment device

Design principles for spray painting wastewater treatment equipment:

Safety and stability

The system design needs to ensure operational safety, avoid secondary pollution caused by equipment failures, and ensure stable and reliable treatment effects. ‌

Efficiency and economy

The treatment process should have the ability to efficiently remove pollutants, ensure that the effluent quality meets the standards, and have low operating and maintenance costs, in line with the economic benefits requirements of the enterprise. ‌

operability

The equipment should be easy to operate and maintain, reduce reliance on professional technicians, and facilitate daily management and maintenance. ‌

Compliant with environmental regulations

The treatment plan must strictly comply with national and local environmental standards, such as the Comprehensive Wastewater Discharge Standard (GB8978-1996), to ensure that the discharge water quality meets the standards. ‌

Process rationality

Adopting mature and reliable process technologies (such as coagulation and sedimentation, biochemical treatment), balancing treatment efficiency and equipment stability, and avoiding any impact on production. ‌

Types and working principles of spray painting wastewater treatment equipment:

The spray painting wastewater treatment equipment is mainly divided into three categories: physical treatment, biochemical treatment, and deep treatment, with significant differences in their core processes:

Physical processing equipment

The water jet spray booth introduces paint mist particles into the atomized water flow through a vertical laminar airflow, disperses the water flow and collides with the paint mist using a showerhead structure, and generates rotating turbulence through 30 ° inclined blades to extend the gas-liquid contact time (1.2-1.8 seconds), preliminarily removing 85% of pollutants. ‌

Biochemical treatment equipment

The activated carbon adsorption device utilizes a porous structure to adsorb VOCs, combined with photocatalytic equipment to decompose organic matter through high-energy ultraviolet radiation. Catalytic combustion equipment decomposes organic waste gas through catalysts at low temperatures to achieve efficient purification. ‌

Deep processing equipment

The wet scrubbing tower captures paint mist through contact between water mist and exhaust gas, and some VOCs are absorbed by water; The dry paint mist purifier uses physical filtration to separate particles, reducing the burden of subsequent processing. ‌

Spray painting wastewater treatment technology:

Ozone disinfection technology

The ozone generation system adopts an array based distributed control, and adjusts the ozone concentration in real time through an automatic detection device to ensure water quality safety. This technology can stably maintain ozone concentration, reduce equipment maintenance costs, and is suitable for wastewater disinfection treatment. ‌

Multi level filtration technology

Pre treatment: Grille slag removal to remove large particle impurities (such as paint slag and metal fragments).

Coagulation precipitation: Sedimentation is achieved by aggregating suspended solids into large particles using coagulants.

Deep filtration: using activated carbon adsorption or reverse osmosis membrane technology to remove residual pollutants. ‌

Biological processing technology

By using A/O (anaerobic aerobic) process or MBR membrane bioreactor, organic matter can be decomposed by microorganisms, and the effluent COD can be reduced to below 50mg/L, achieving wastewater recycling. ‌

Wastewater recycling technology

Some cases have achieved a recovery rate of over 90% through a combination of ultrafiltration and reverse osmosis processes, which are used for workshop cleaning or recycling. ‌

Main structure of spray painting and coating wastewater treatment equipment:

Main structure of sewage treatment

Taking the paint water separation integrated machine as an example, the equipment body includes components such as sewage pump, reactor, and floating slag collection system. After the sewage is pumped into the equipment, the treatment agents (such as coagulants) are mixed with the wastewater in the reactor, and the paint mist particles are separated by air flotation. The floating slag is scraped into the collection tank for recycling. ‌

Filtering and Separation System

By using air flotation separation technology, paint mist particles are separated from water by adjusting the water flow velocity and turbulence intensity. Some equipment is also equipped with dissolved oxygen flotation devices to further remove micron sized paint mist particles. ‌

Drug addition and automation control

Most devices support automatic dosing systems that dynamically adjust the dosage of chemicals based on wastewater turbidity, reducing manual intervention. The treated water quality can be recycled, extending the water replacement cycle. ‌

Subsequent processing techniques

Some devices integrate electrocatalytic oxidation and ultrasonic degradation modules, which further reduce the concentration of wastewater pollutants through electro oxidation and cavitation. ‌

The specific structure of different devices may vary, but core functional modules such as separation, filtering, and automation control are commonly configured. ‌

Processing technology:

Pre treatment: Use a grid to remove large particle impurities, adjust the pH value of wastewater, and separate suspended solids through coagulation sedimentation or air flotation. ‌

Biochemical treatment: Anaerobic tanks decompose large molecular organic matter, while aerobic tanks further degrade pollutants through activated sludge process. ‌

Deep processing: Using techniques such as sand filtration and reverse osmosis to remove fine particles, and ultraviolet disinfection to ensure water quality safety. ‌