Product Overview

The JLNC industrial bag filters are high-efficiency long-bag pulse jet dust collection systems developed specifically for flue gas treatment in the electrolytic aluminum industry, capable of simultaneously handling particulate dust and hydrogen fluoride (HF) gas purification.

The unit incorporates a built-in dual-channel counter-flow two-stage dry adsorption purification system. Key features include: a Venturi gravity injection reactor on the secondary air duct; a multi-point circulation feeding control device, volute reactor, and alumina auto-regulation system on the primary air duct; an advanced airflow distribution system; online pulse jet cleaning; online monitoring; and top-lift large access doors. The electrical system employs PLC-based control with compartment pressure monitoring and integrated HF emission concentration measurement.

The JLNC delivers high-efficiency purification of HF gas and flue gas particulates, with strong flue gas handling capacity and convenient maintenance.

Performance Characteristics

• Built-in dual-channel counter-flow two-stage dry adsorption purification technology.

• Venturi gravity feeding device with pulse jet injection; unrestricted feed rate with high and uniform feed concentration.

• Large modular combined structure, double-row arrangement, top side outlet with central outlet duct; top-lift large access doors sealed with high-temperature and corrosion-resistant strip seals; airtight welding with kerosene leak testing; air leakage rate below 2%.

• Inlet flow distribution ducting and hopper deflector technology ensures uniform airflow distribution and smooth dust discharge; wear-resistant design at critical locations; enlarged space below filter bags prevents direct airflow impingement, extending bag service life.

• Online pulse jet cleaning (without stopping airflow) maintains a residual dust layer on bag surface, controlling resistance at 900–1,600 Pa, further adsorbing fluorides and reducing emission concentration.

• Tube sheet holes processed by laser cutting; elastic snap-ring bag-top seal structure, trial-fitted before batch production; guaranteed emissions below 5 mg/Nm³.

• Automated production line bag cages, burr-free, plastic-coated; intermediate support rings minimize bag abrasion and extend service life. Filter media by Zhejiang Ruijie, specifically for electrolytic aluminum flue gas purification; surface readily forms dust layer for "dust-on-dust" filtration; longitudinal heat-fused seams prevent needle-hole leakage; elastic snap-ring bag-top ensures reliable sealing and easy installation.

• PLC control with HMI interface; online pressure and emission monitoring with real-time broken bag detection, optimizing operational management.