QSB Submersible Jet Aerator

Name: QSB Submersible Jet Aerator

Brand: Jiangsu Du'an Environmental Protection

Model: QSB-5.5

Material: Cast iron casing, carbon steel aeration disc 

Voltage: 380V

Motor Power: 5.5KW

Includes intake pipe, silencer, bell mouth, fixing bolts, and sealing gasket

Jet Aerator Application Scope

The QSB deep-water self-priming submersible jet aerator can operate normally and continuously under the following conditions:

1. Medium temperature not exceeding 40°C;

2  Medium pH value between 5~9;

3  Medium density not exceeding 1150kg/m³

Du'an Environmental Protection QSB Jet Aerator Technical Description:

The QSB submersible jet aerator consists of five parts: submersible pump, jet device, diffuser, air intake pipe, and hose. It integrates advanced diffusion technology based on traditional jet principles and adopts jet aeration methods.

During operation, the pump impeller, driven by the submersible motor, rotates at high speed, pushing the mud-water mixture into the jet device to form a jet stream. This creates a negative pressure zone around the jet, drawing air through the intake pipe into the nozzle's negative pressure area. In the throat of the jet device, air, water, and mud are thoroughly mixed. The kinetic energy of the jet is gradually converted into pressure energy through the diffuser tube before entering the disperser. Within the disperser, the air, water, and mud mixture undergoes further mixing, forcing the gas to undergo shearing, crushing, and emulsification, ensuring that most of the oxygen is fully dissolved in the water. Simultaneously, under the pressure of the jet fluid, the jet carries oxygen molecules and micro-bubbles, ejecting obliquely downward from the disperser nozzle and diffusing. This impacts and stirs the water body and the sludge at the bottom of the biochemical tank, causing it to rise slowly from the bottom to the surface. Micro-bubbles typically remain in the water for over 30 seconds, allowing sufficient dissolution and absorption of oxygen from the air, thereby improving oxygen transfer efficiency and oxygenation capacity. This equipment generates high negative pressure and intense turbulence, mixing, and shearing within the jet device, promoting high-frequency oscillation of the liquid and gas films. This significantly reduces bubble diameter, increases bubble count, expands the specific surface area of bubbles, and thins the gas-liquid film, greatly reducing mass transfer resistance and facilitating better transfer of oxygen molecules from the gas to the liquid phase. The jet, advancing at high speed and rotating rapidly within the disperser, possesses high angular velocity, giving it strong penetration power. This allows micro-bubbles to travel far in the water, enhancing mixing, flow propulsion, and oxygenation capabilities. It is suitable for deep-water aeration, aeration and mixing in biochemical tanks, sludge aeration and mixing, and high-concentration organic wastewater treatment processes.

Aeration treatment of sewage channels can help purify and clean wastewater. As a critical process in aerobic biochemical wastewater treatment systems, aeration serves to supply oxygen to the reactor, ensuring the dissolved oxygen required for microbial biochemical activity, and maintaining thorough mixing of microorganisms, substrates, and dissolved oxygen—i.e., sludge, water, and air—providing favorable biochemical reaction conditions for microbial degradation of organic matter. Simultaneously, aeration is also the most energy-consuming process in aerobic biochemical wastewater treatment systems, with aeration oxygenation electricity consumption typically accounting for 60% to 70% of total power consumption. Therefore, selecting aeration devices with low energy consumption and cost is of great significance. With continuous advancements in technology, solar-powered aerators have been introduced to reduce operational costs. Utilizing solar energy can significantly cut down on the substantial electricity expenses associated with conventional power sources. Common aeration methods for aerators include:

1. Blower Aeration:

Uses blowers with certain air volume and pressure to force air into wastewater tanks via connecting pipelines through microporous diffuser plates (or tubes), ensuring full contact between wastewater and air.

Characteristics of Blower Aeration:
1) Requires a certain air volume. The goal of aeration is to increase sufficient dissolved oxygen in water or liquid to meet the oxygen demands of aerobic organisms.
(2) Requires sufficient pressure. The aeration process involves mass transfer between gas and liquid molecules. To ensure full diffusion and contact of gas in the liquid and prevent sedimentation of suspended solids, the blower must generate adequate pressure.
Main application areas of blower aeration: (1) Aquaculture blower aeration; (2) Water treatment blower aeration.
2. Surface Aeration:
Uses a motor to directly drive an axial flow impeller, pumping wastewater through a conduit and guide plate to spray it outward, forming a thin curtain (or droplet-like) of water. During ejection, the water contacts air to form droplets, which upon impact with the liquid surface, create turbulence and numerous bubbles, increasing oxygen content in the water. It can draw water from the bottom and discharge it from the top, forming a circulating flow that also provides mixing effects. Suitable for domestic sewage, agricultural and aquaculture oxygenation, and various industrial wastewater aeration.
3. Submersible Jet Aeration:
Consists of a dedicated aeration pump, air intake duct, nozzle seat, mixing chamber, and diffusion tube. Water flows at high speed from the pump outlet into the mixing chamber via the nozzle seat, while air is guided through the intake duct to combine with the water flow before being discharged through the diffusion tube. Also known as a jet aerator.
Features and Uses of Submersible Jet Aeration:
Deep-water self-priming submersible jet aerators perform simultaneous water agitation and oxygenation, producing fine bubbles that achieve high oxygen transfer rates and offer the advantage of non-clogging impellers. The powerful unidirectional flow creates effective convective circulation, and motor load varies little with water level changes, making it ideal for pools with significant water level variations. Without requiring compressed air, submersible aeration can reach depths of up to 10m. It is cost-effective, easy to install, and maintain.

4. Submerged Aeration:
Utilizes a motor to directly drive an impeller, generating centrifugal force that draws in nearby low-pressure water flow. Simultaneously, a vacuum is created at the impeller inlet to吸入 air. In the mixing chamber, air and water blend and are rapidly discharged by centrifugal force, known as a submerged aerator. The strong water jet creates effective convective circulation, breaking air into numerous fine bubbles that rise slowly, allowing atmospheric oxygen to dissolve into the water. The uniform bubbles have a large surface area, making efficiency far superior to other aeration devices.
Characteristics of Submerged Aeration:
1. Unique mixing chamber design吸入 ample air, ensuring thorough mixing with water, producing fine, numerous bubbles with high oxygen dissolution rates.
2. The impeller generates pressure, and nozzle orifices create strong water jets mixed with air, enhancing oxygen transfer efficiency in water while providing excellent mixing, maintaining necessary flow velocity for activated sludge suspension.
3. Designed for underwater operation with low rotation speed and low noise; above-ground air intake ducts can be equipped with silencing devices, eliminating the need for additional soundproofing chambers and reducing costs.
4. Options include automatic and non-automatic detachment devices; simple installation and easy maintenance save operational expenses.
5. Wide range of applications: industrial wastewater treatment, livestock drainage treatment, general sewage pipeline aeration projects, aeration tanks in factory drainage facilities using activated sludge processes, usable individually or in combination.

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