Can you provide more details about the Venturi tube in the filter bag cage?
Here are the detailed descriptions about the Venturi tube in the filter bag cage:
Structure
The Venturi tube consists of a convergent section, a throat section, and a divergent section. The convergent section gradually narrows the flow channel of the gas, causing the gas velocity to increase and the pressure to decrease. The throat section is the narrowest part of the Venturi tube, where the gas reaches the maximum velocity and the minimum pressure. The divergent section then gradually expands the flow channel, allowing the gas velocity to decrease and the pressure to recover. In the filter bag cage, the Venturi tube is usually made of stainless steel or other corrosion – resistant materials to ensure its durability and reliability in harsh industrial environments.
Working Principle
When the pulse – jet cleaning system is activated, high – pressure air is injected into the filter bag through the blowpipe. As the air passes through the Venturi tube, the constricted throat section causes the air to accelerate. According to the principle of conservation of energy, the increase in air velocity leads to a decrease in static pressure, creating a negative pressure zone. This negative pressure zone induces a large amount of surrounding air to be sucked into the filter bag. The combined effect of the high – pressure air from the blowpipe and the induced air causes a rapid expansion and contraction of the filter bag, generating a strong vibration that effectively detaches the dust adhered to the filter bag surface.
Functions
Enhanced Dust Removal Efficiency: By inducing a large volume of additional air, the Venturi tube significantly increases the air volume and momentum entering the filter bag during the cleaning process. This powerful air flow can more effectively dislodge the dust particles, especially those that are firmly attached to the filter bag, thereby improving the dust removal efficiency and ensuring the cleanliness of the filter bag.
Reduced Energy Consumption: The Venturi tube enables the use of a relatively small amount of high – pressure air to achieve a large – scale cleaning effect. It utilizes the energy – saving principle of inducing surrounding air, reducing the need for a large amount of high – pressure air supply. This helps to lower the energy consumption of the dust removal system, resulting in significant energy savings and reduced operating costs.
Uniform Cleaning: The design of the Venturi tube ensures a relatively uniform distribution of the air flow entering the filter bag. This uniformity helps to avoid local over – cleaning or under – cleaning, ensuring that the entire filter bag is cleaned evenly. As a result, the service life of the filter bag is prolonged, and the filtration performance of the dust collector is maintained at a stable level.