High-Performance and Energy-Saving Dissolved Air Water Treatment for Environment

Product Specification

Equipment Description:

I. Working Principle
‌1. Pressurized Dissolved Air‌
Air at a pressure of 0.35-0.45 MPa passes through a dissolver and mixes with water, forming supersaturated dissolved air water. The filler layer inside the dissolver enhances gas-liquid contact efficiency.
‌2. Decompression Release‌
The dissolved air water enters a normal pressure environment through a releaser, instantly releasing microbubbles with a diameter of 20-50 μm. These bubbles evenly adhere to the surface of suspended matter, reducing its density to less than that of water.
‌3. Flotation Separation‌
The bubble-suspended matter complex rapidly rises to form a scum layer. The clear water below is discharged through a collection pipe, with a portion of it being recycled for the dissolved air water cycle.
‌4. Scum Removal‌
A scum scraper removes the surface scum into a sludge tank, reducing the water content to ≤90%, completing solid-liquid separation.

‌II. Technical Features
‌1. High-Efficiency Separation‌
Removal rates of 85%-95% are achieved for oily wastewater, fibrous suspended matter, and algae. 2. Energy-Saving Design
The modular structure reduces footprint by 30% and reduces dissolved air energy consumption by 20% compared to traditional equipment.
3. Stable Operation
The system features uniform microbubble distribution and strong resistance to water quality fluctuations, making it suitable for wastewater with high shock loads.
4. Environmental Compatibility
The integrated paint mist treatment unit ensures emissions comply with GB 37824-2024 standards.

III. Applications
Industrial Wastewater: Separation of suspended solids and grease in the papermaking, printing and dyeing, and food processing industries.
Municipal Wastewater: Concentration of sludge after biological treatment and purification of low-turbidity, high-color water.

Main structures and components:

I. Core Structure
1. Dissolved Air System
Dissolved Air Tank: A high-pressure vessel (operating pressure 0.35-0.45 MPa) with an internal packing layer to enhance gas-liquid mixing efficiency.
Gas-Liquid Mixing Pump/Air Compressor: Mixes air with return water under pressure to create supersaturated dissolved air water. Some designs use a gas-liquid mixing pump instead of a traditional air compressor, simplifying the air flow piping.
Water Pump: Provides a high-pressure water source. Some models use return water to produce dissolved air water to reduce energy consumption.
2. Release System
Release: A core component responsible for instantaneously releasing dissolved air water at reduced pressure, generating microbubbles of 20-50 μm. Circular flotation systems typically place the releaser in the center of the tank to ensure even distribution of bubbles.
Distributor (conical structure): Assists the releaser in evenly mixing dissolved air water with wastewater, improving impurity capture efficiency. 3. Flotation Tank
Contact Zone: This is where wastewater and dissolved air water mix, allowing suspended solids and air bubbles to combine.
Separation Zone: This allows scum to float and the clean water to separate. The tank is typically made of stainless steel or fiberglass for corrosion resistance.
Case Types: These include horizontal flow (rectangular), circular (such as the QFY type), and upflow (vertical flow).
4. Sludge Scraping System
Sludge Scraper: This is a chain or rotary design with a scraping efficiency of ≥95% and a sludge moisture content of ≤90%.
Sludge Tank and Sludge Discharge Pipe: This collects and discharges sludge and settled sludge.

II. Auxiliary Systems
1. Control System
PLC Module: This automatically adjusts the dissolved air pressure, reflux ratio (typically 20-40%), and scraping frequency, supporting unattended operation. 2. Chemical Dosing Device
Coagulant Dosing Unit: Adds chemicals such as PAC and PAM to enhance the binding of flocs and bubbles, improving pollutant removal efficiency.
3. Clean Water Circulation System
Return Pipeline: Recycles treated clean water (approximately 30%) for dissolved air water production, reducing water consumption.

III. Typical Configuration Differences

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.