Project Problem: 

A pharmaceutical factory's traditional Chinese medicine residue drying furnace production line generates flue gas with high dust concentration, high moisture content, high emission points, and a wide pollution range. Based on the site conditions, the Liefert EPC project team designed the following specific solution:

Project Design Parameters:

【Product Selection】Low-pressure pulse high-temperature bag filter

【Processing Capacity】50000 m³/h

【Inlet Flue Gas Temperature】90~150℃

【Flue Gas Moisture Content】5280 kg/h

【Filter Bag Temperature Resistance Requirement】≥200℃

【Filter Bag Material】Polytetrafluoroethylene (PTFE)

【Dust Emission Concentration】＜10 mg/Nm³

【Dust Collector Resistance】＜1500 Pa

【Dust Collector Air Leakage Rate】＜2%

【Pulse Air Source】0.3～0.4 MPa

【Filtration Velocity】0.5～0.8 m/min

【Dust Removal Efficiency】99.99%

【Process Medium】Flue gas generated from medicinal residue

Shipping site:

Process flow: 

Hot air furnace ⇒ Dryer ⇒ Cyclone separator ⇒ Bag filter ⇒ Desulfurization tower

Filtration Process: When dust-laden gas enters the ash hopper from the bottom of the housing, the sudden expansion of the airflow cross-sectional area reduces the flow velocity, causing some coarser and denser dust particles to settle in the ash hopper under gravity.

Low-density dust particles enter the baghouse dust collector and, through a combination of inertia, collision, sieving, interception, and electrostatic effects on the filter bag surface, settle to form a dust layer.

The purified gas enters the clean air chamber and is discharged from the exhaust pipe by a fan.

Cleaning Process: When the pulse valve opens, compressed air from the air tank is ejected through the pulse valve and small holes in the blowpipe, creating a high-speed, high-pressure jet of airflow towards the filter bag opening. 

This forms an induced airflow several times the volume of the jet airflow, which enters the filter bag, generating instantaneous positive pressure and causing rapid expansion within the bag.

Dust deposited on the outside of the filter bag falls into the ash bin, achieving the purpose of cleaning.

Online Monitoring Data (Emissions, Flue Gas Volume):

Product Design Features: 

Outdoor dust collector with excellent insulation; 

Large filtration area: 2160-5760 m²; 

Large air volume handling capacity: 59200-91200 m³/h; 

Offline cleaning and maintenance functions; 

Suitable for air purification of lightweight, fine, and sticky dust; 

The entire unit is automatically controlled by a microcomputer, with easily adjustable parameters, enabling unattended operation.

https://www.airfiltersolution.com/