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Skid-Mounted Painting Wastewater Treatment Equipment

Skid-Mounted Painting Wastewater Treatment Equipment

SCKJ-GYCK-10t/d
Can be customized according to user needs. Production cycle to be determined after negotiation.

This system is a skid-mounted painting wastewater treatment system, and the production wastewater treated is mainly painting wastewater.

The system is customized according to the owner's actual production and drainage conditions, drainage volume, reserved space on site and emission standards. After the effluent meets the standards, it can be discharged into the municipal pipe network and then treated twice by the municipal sewage plant.

The wastewater is metal surface treatment wastewater, which mainly comes from pre-degreasing, degreasing, surface conditioning, and pre-processing processes. The wastewater mainly contains pollutants such as surfactants and emulsified oil. Spraying wastewater is generally considered cleaning wastewater, but the characteristics of wastewater are that it contains organic matter, oil, and suspended impurities. Moreover, for this wastewater, it generally contains organic components that are easily biodegradable to biological bacteria. Considering the above, this plan intends to use neutralization + high-efficiency dissolved air flotation + filtration as the main body. Metal ions, pollutants, and harmful and toxic substances in wastewater are removed through pretreatment, and the effluent meets the standards and is discharged into the municipal pipe network.

Consult

Features Technical Indicators Overall Dimension

Ⅰ.Process selection

Ⅱ. Process Description and Equipment Configuration
1. Water collection tank
Due to the intermittent discharge of production wastewater, the water quality and quantity fluctuate greatly. Setting up a regulating tank can adjust the water quantity and homogenize the water quality, providing a balanced and stable water inlet for subsequent treatment.
2. Neutralization tank
The effluent from the equalization tank is lifted to the neutralization tank, and a regulator is added to adjust the pH to about 7. The amount of acid added is adjusted according to the pH online detection data.
The commonly used chemicals in the neutralization tank are hydrochloric acid and sulfuric acid, which have better effects. However, according to the actual situation, other acids can also be used for neutralization, such as oxalic acid, but calculations need to be made and the dosage needs to be set.
3. Air flotation sedimentation machine
Flocculants are added to the wastewater in the mixing reaction tank. The strong stirring of the first-stage mixer allows the agent and the wastewater to fully contact and react. At the same time, alum flocs are aggregated under the action of the flocculant. Under the joint action of the agent and the stirring device, the metal ions and insoluble solids in the wastewater form flocs at the same time. After the continuous action of the tertiary reaction tank, the flocs gradually increase.
After the addition of drugs and the mixing reaction, there are a lot of metal ions and suspended solids in the sewage that have not been separated, so a sedimentation tank must be set up. Mud and water are separated under the action of gravity sedimentation. This design is a vertical flow sedimentation tank, which has good sludge degradation effect and stable effluent effect. The supernatant enters the flotation system, and the bottom sludge is discharged into the sludge tank.
The main function of air flotation is to hydrolyze suspended fine organic matter to dissolve it in water, and to convert large molecular complex organic matter into small molecular simple organic matter, while significantly reducing COD and removing wastewater suspended matter and emulsified grease. In the air flotation tank, highly dispersed tiny air robes are used as carriers to adhere to the suspended pollutants in the wastewater, making their buoyancy greater than gravity and resistance, so that the pollutants float to the water surface and form foam, and then scraping equipment is used to scrape the foam from the water surface to achieve solid-liquid or liquid-liquid separation.
4. Middle pool
The flotation water enters the intermediate water pool and then enters the filtration system through a pump.
5. Filtration system
The intermediate water pool passes through the lifting pump and enters the multi-media filter tank, which is filled with quartz sand filter material to filter the incoming sewage. It then enters the activated carbon filter tank, where the powerful adsorption effect of activated carbon is used to adsorb the residual organic pollutants and metal ions in the water, and the effluent is discharged into the municipal pipeline network.
The filter backwash water is returned to the regulating tank.
6. Clean water pool
The filtered water enters the clean water tank , which is equipped with a backwash pump . The filter tank is backwashed regularly and the water discharged from the clean water tank is discharged into the municipal pipe network .
7. Sludge dewatering system
Since flocculation and sedimentation will produce a large amount of sludge, a sludge tank is specially set up for easy treatment. The concentrated sludge enters the plate and frame filter press. After further dehydration of the sewage, it is stored as hazardous waste and transported out for disposal regularly.
Ⅲ. Equipment advantages
1. The manual-automatic integrated control system makes the equipment operation simpler and can realize unattended and automatic operation and remote control.
2. Skid-mounted equipment, easy installation, more compact equipment, and small footprint.
3. No civil construction is required, and the system water output is stable and meets the standards.
4. It can be flexibly customized according to the customer's emission standards, water quality and water quantity.
5. Provide equipment installation drawings, electrical diagrams, bilingual manuals, operating instructions and operation training videos to ensure better after-sales service.