How Does a Venturi Wet Dust Collector Work to Remove Airborne Particles?

1.Venturi Effect: The Venturi effect plays a pivotal role in the operation of a Venturi wet dust collector. As contaminated air enters the collector through the specially designed inlet, it passes through a narrowing section known as the Venturi throat. This constriction causes the air velocity to increase while the pressure decreases, creating a low-pressure zone. This phenomenon, known as the Venturi effect, induces the high-velocity airflow necessary for efficient particle capture and removal.
The design of the Venturi inlet is crucial for optimizing dust collection efficiency. By carefully engineering the dimensions of the converging and throat sections, engineers can achieve the desired air velocity and pressure drop to maximize particle capture while minimizing energy consumption.

2.Water Injection: Water injection is a key component of the Venturi wet dust collector system. It serves multiple functions essential for effective dust capture and removal. When water is injected into the high-velocity air stream at or near the Venturi throat, it acts as a wetting agent, coating airborne particles and making them heavier. This process, known as wet scrubbing, enhances particle capture efficiency by increasing their mass and promoting agglomeration.
Additionally, the injected water creates a water curtain or barrier that intercepts airborne particles, preventing their escape into the clean air stream. This water curtain effectively traps the wetted particles, ensuring they are captured and removed from the airflow.

3.Particle Capture: The turbulent airflow generated by the Venturi effect promotes the collision and adhesion of airborne particles with water droplets. As the contaminated air and water mixture flows through the Venturi inlet, the turbulent motion facilitates intimate contact between the particles and water, promoting efficient capture and removal.
The captured particles become entrained in the water stream and are carried downstream to the separation chamber or settling tank for further processing. This turbulent mixing action ensures thorough particle capture and prevents particle re-entrainment into the clean air stream.

4.Separation and Collection: Following particle capture, the air and water mixture enters a separation chamber or settling tank where gravity facilitates the separation of particles from the airflow. The settling tank is designed to allow the heavier particles to settle out of the water stream and accumulate at the bottom of the tank, forming a slurry or sediment.
Depending on the specific design of the Venturi wet dust collector, various mechanisms may be employed to enhance particle separation and collection. These may include baffle plates, cyclonic separators, or centrifugal forces to promote efficient particle settling and minimize carryover of particulate matter into the clean air stream.

5.Clean Air Discharge: Once the particles have been separated and collected, the cleaned air is discharged from the Venturi wet dust collector. The air may undergo further filtration or treatment to remove any remaining contaminants or particulate matter before being released into the atmosphere or recirculated back into the facility.
The discharge of clean air is a critical aspect of the dust collection process, as it ensures compliance with environmental regulations and maintains indoor air quality standards. Properly designed Venturi wet dust collectors are capable of achieving high levels of air cleanliness while minimizing energy consumption and operational costs.

6.Water Recycling: Many Venturi wet dust collector systems incorporate water recycling systems or settling ponds to minimize water consumption and environmental impact. These systems allow the collected water to be recycled and reused within the dust collection system, reducing the need for fresh water intake and wastewater disposal.
Water recovery systems typically include settling tanks or clarifiers that allow solids to settle out of the water, leaving behind clean water that can be recirculated through the system. By recycling water, Venturi wet dust collectors minimize water consumption, reduce operating costs, and minimize environmental impact, making them a sustainable solution for industrial dust control applications.

PTW Series - Wet Dust Collector
Product Description
PTW series venturi scrubbers are specially designed and developed by PTING for flammable and explosive media. The product uses a 4-level filter layer to separate and purify dust and oil mist. 
First, the high-temperature dust or oil mist gas enters the separator through the air inlet pipe.
The flowing dust and oil mist particles in the gas contact with the scrubbing liquid mist at the venturi throat, which can effectively reduce the gas temperature. Then the airflow rapidly accelerated at the throat of the Venturi. Under the action of inertia, the dust and oil mist particles move toward the liquid surface. The relative motion of the airflow and the liquid makes it well mixed.
At the same time, in the scrubber, under the action of the metal centrifugal separator, the dust and oil mist are separated from the airflow, and then fall into the water tank, and then pass through the mud scraper, and the purified air is discharged from the pipeline. The separated dust and oil mist is collected by the recycling device.