Case Study: PTFE Membrane ptfe Filter Bags in Biomass Power Plant Application
Case Study: PTFE Membrane PTFE Filter Bags in Biomass Power Plant Application
Project Overview
A biomass power plant sought a durable and high-efficiency filtration solution for its dust collection system, where flue gas contains fine ash particles, high moisture, and acidic components generated from organic fuel combustion.
The client aimed to replace imported filter bags with a cost-effective PTFE membrane solution that could maintain emission standards under high-temperature and corrosive environments.
An initial installation of 900 PTFE filter bags and matching cages was carried out as a pilot project.
Operating Conditions
Industry: Biomass Power Generation
Application: Flue gas filtration after the boiler
Gas temperature: 180–200°C
Dust characteristics: Fine, sticky, high-moisture biomass ash
Cleaning method: Pulse jet (compressed air 0.5–0.7 MPa)
Filter bag size: Ø160 × 6000 mm
Cage structure: 20 vertical wires Ø3.5 mm, ring spacing 150 mm, 1 mm bottom/ring sheet, optional Venturi
Surface treatment: Cataphoresis coating for carbon steel / optional stainless-steel SS304, SS316
SFFILTECH Solution
Based on the working principles of pulse jet dust collectors (DMC type) — where compressed air is injected through Venturi tubes to create reverse airflow and clean the filter surface
— SFFILTECH designed a PTFE membrane ptfe filter bag to provide maximum performance stability.
The drawing as following:
Here is the core Features of the ptfe filter bag:
PTFE membrane surface: Ultra-smooth surface prevents dust adhesion and ensures constant airflow.
Filtration efficiency: ≥99.9% with minimal pressure drop.
Chemical resistance: Excellent durability against acidic and alkaline flue gases.
Thermal endurance: Continuous operation at 250–260°C.
Mechanical strength: Seamless welding and precision stitching resist pulse cleaning fatigue.
Cage support: Made to GB/T 6719-2009 standards, ensuring uniform load distribution and dimensional stability under high pressure
Performance Results
After several months of operation, the PTFE membrane filter bags achieved outstanding performance:
Stable differential pressure maintained throughout over 5,000 pulse cycles.
No visible wear, membrane peeling, or bag deformation after inspection.
Emission levels <5 mg/Nm³, compliant with EU environmental standards.
Maintenance cost reduced by ~35% compared to previous imported filters.
Bag lifespan extended by 1.5–2×, reducing replacement frequency and downtime.
Technical Advantages Demonstrated
This installation highlights the efficiency of pulse-jet cleaning systems paired with PTFE membrane media, where the optimized filter design allows for continuous dust removal without interrupting airflow.
The smooth PTFE surface minimizes re-entrainment of particles, while the cage’s anti-corrosion coating (cataphoresis or silicone-sprayed finish) provides structural stability and long-term reliability even in high-humidity environments.
Conclusion
This project confirms that SFFILTECH PTFE membrane filter bags deliver the same performance and reliability as European alternatives at significantly lower cost.
Combining advanced membrane technology, automated cage production, and ISO-certified quality control, SFFILTECH ensures dependable filtration solutions for biomass power, cement, steel, and waste incineration industries worldwide.
