Air Polution Controll System Shahdol

A Bag Filter (or Fabric Filter) is a pollution control device that removes particulates out of air or gas released from commercial processes or combustion. It is widely used in dust collection systems.

⚙️ Working Principle

Dust-laden air enters the filter housing.

The air passes through filter bags (fabric tubes).

Dust particles are trapped on the outer surface of the bags.

Clean air exits through the outlet.

Periodically, the bags are cleaned (manually or automatically).

🧪 Types of Bag Filters

Shaking Type – Manual/Mechanical shaking for cleaning bags.

Reverse Air Type – Uses low-pressure air to reverse airflow and dislodge dust.

Pulse Jet Type – Uses high-pressure short bursts of air (pulse) to clean bags. Most common.

🔩 Main Components

📐 Design Parameters

Air-to-Cloth Ratio: Airflow rate ÷ Filter area (m³/m²/min)

Temperature: Choose fabric based on operating temperature.

Particle Size: Filter selection depends on dust properties.

Differential Pressure: Indicates pressure drop across bags.

✅ Applications

Cement Plants

Steel & Foundries

Chemical Industry

Power Plants

Food Processing

Pharmaceuticals

🔍 Advantages

High efficiency (99.9%+ for particles >1 micron)

Suitable for dry dust

Can handle large volumes of air