LZG-L Automatic Candle Filter

Description

Designed for both performance and environmental integrity, the Candle Filter System delivers advanced, safe, and highly efficient solid-liquid separation. By combining superior energy efficiency with fully enclosed design, high precision and a high degree of automation, this system is perfectly suited to tackle your most demanding media and intricate processing requirements.

System design and customization services.

1. Fully Automatic Operation & Smart Remote Service

• Full Automation Control: The system is controlled by a PLC or DCS for full automation of all steps, including filtration, back-blowing, and regeneration. This significantly reduces labor costs and ensures consistent operation.

• Remote Debugging & Support: The system supports remote debugging, allowing our technical team to promptly and effectively address on-site issues and provide high-efficiency after-sales technical support.

2. Superior Filtration Precision & Flexible Method

• Ultra-High Precision: When utilizing asymmetric metal sintered elements, the system achieves direct surface filtration with precision as fine as 0.2μm (sub-micron level), satisfying the most stringent requirements for precision filtration.

• Flexible Filtration Methods: The system offers flexible filtration methods tailored to specific process needs.

• Surface Filtration: Ideal for direct filtration in applications demanding high precision.

• Deep Filtration: It can be achieved via filter aids (precoat or body feed) or by utilizing a self-forming filter cake. It is ideally suited for handling highly viscous liquids or media with high solid content, significantly extending the system's application scope.

3. Highly Customizable Design & Turnkey Supply

• Customizable Design: Our system is engineered to be fully customizable based on the client’s specific requirements for flow rate, pressure, temperature, and media characteristics.

• Flexible Supply Scope: We offer flexible supply options, ranging from providing a single filter vessel (individual unit) to a complete turnkey supply. The full package includes all necessary piping, instruments, valves, and accessories, simplifying your procurement and installation process.

Working Principle

The Candle Filter utilizes an innovative structure, featuring a unique top-mounted horizontal suspended tubes system for stable operation and easy filter element replacement. Its efficient solid-liquid separation cycle consists of two phases: Filtration and Regeneration.

During filtration, the unfiltered liquid enters the filter through the inlet, the solid impurities are intercepted on the exterior of the filter elements. The clean liquid passes through the central tube inside the filter elements to the horizontal suspension tubes, and is finally discharged through the grouped filtrate outlets.

Regeneration is triggered by a pre-set differential pressure or time; the system first uses compressed air to discharge residual liquid and then employs a back-blowing compressed gas to dislodge the filter cake. Finally, the detached cake and sludge are expelled through the bottom discharge port.

Filter Element Status during Gas Backwashing: During backwashing – "membrane burst" – the filter cloth expands from folded state back to cylindrical shape, allowing thorough detachment of the filter cake.

Key Advantages & Features

• Self-cleaning filter element with excellent regeneration performance

• Flexible Method, Compatible with filter aids to enhance filtration accuracy

• Fully enclosed operation with zero environmental pollution

• Online cake dehydration and discharge

• Online residual liquid removal for dry residue discharge

• Fully Automated Operation(PLC or DCS) & Smart Remote Service

• Customizable Design & Turnkey Supply

Specification

Candle Filter Selection

Model& Specification

Notes:

① Applicable conditions for this table: Design pressure 0.8 MPa; Material – carbon steel shell with rubber lining (3mm+3 mm); horizontal hanging pipes and filter elements made of FRPP.

② Nozzle sizes to be designed according to specific requirements.

③The above are standard parameters; customization is available upon request.

④ Model designation：

Typical P&ID Diagrams(1)：

（1）applies to processes requiring pre-coating

P&ID Diagrams(2)：

（2）applies to points suitable for direct filtration.

Notes:

① The above shows typical P&IDs for candle filter applications. Diagram (1) applies to processes requiring pre-coating, while Diagram (2) applies to points suitable for direct filtration.

② Key applications for P&ID (1): filtration of titanium oxysulfate solution in Titanium Dioxide (TiO2) Production, flash water, second bath water, acidic cutting water, acid station water in viscose fiber industry, and Steam condensate precision filtration in acrylic fiber industry, Sugar syrup decolorization filtration, etc.

③ Key applications for P&ID (2): catalyst recovery filtration, solids recovery filtrationfrom CTA/PTA mother liquor, precision filtration of lithium salts, etc.

Application Fields

①Inorganic Chemicals Production

②Specialty Chemicals & Polymers

③Energy, Petrochemicals, and Emerging Technologies