Product Overview

Fiberglass anode tubes are key components widely used in industrial environmental protection and related fields, especially playing a core role in wet electrostatic precipitator (mist) systems. They are mainly composed of glass fiber as reinforcing material combined with high-performance resin matrix through composite technology. With unique process design, their compact and rational structure enables efficient collection of pollutants like dust and mist droplets, making them crucial in exhaust gas purification processes across various industries. In wet electrostatic precipitators (mist collectors), they form an electric field together with cathode wires, using electrostatic force to make charged particles in the exhaust gas move and deposit on the anode, thus achieving the purpose of purifying the exhaust gas.

Production Process

Raw materials selection: Choose untwisted glass fiber roving (high strength, high tensile property) and glass fiber mat (enhance stability and molding effect), use unsaturated polyester resin or vinyl ester resin as matrix (endow corrosion resistance), add curing agent and accelerator to precisely control curing reaction and ensure product quality.

Fiber Impregnation Process：The process pulls untwisted glass fiber rovings and mats through a resin bath via a high-precision pultruder, evenly saturating fibers with resin for tight bonding to ensure excellent product strength and toughness.

Precision Pultrusion Molding：The impregnated fiber is pulled by a high-precision pultruder into a thermoforming mold matching the anode tube's dimensions, where it cures under controlled temperature and pressure; some advanced processes include an air-cooling section to stabilize dimensions and properties.

Fine Post-processing Procedures：The molded anode tubes are cut to specified lengths using high-precision equipment per project requirements, with post-processing like grinding and polishing for products requiring special surface finishes to remove defects, enhance smoothness, and minimize impurity adhesion during operation.

Product Characteristics

Excellent Corrosion Resistance：Using corrosion-resistant resin and glass fiber materials, it can withstand acid, alkali and salt corrosion, is suitable for chemical, metallurgical and other scenarios, and can operate stably for a long time, extending equipment life and reducing maintenance costs.

Good Electrical Conductivity (for some products)：Some FRP anode tubes add special conductive fillers to the resin to meet the conductivity requirements of equipment like wet electrostatic precipitators (foggers), ensuring current conduction and improving equipment operation efficiency and pollutant collection efficiency.

Compact and Efficient Structure:The common honeycomb structure design, a feature of FRP anode tubes, makes the inner and outer surfaces of each tube a precipitation surface without purification dead corners. When treating flue gas and other media of the same scale, it can achieve higher purification efficiency with smaller volume and floor area, saving equipment space and installation costs.

Advantages of Light Weight and High Strength：Weighing only a fraction of same-spec metal pipes, it reduces labor intensity, costs and installation difficulty in transport. With fiber reinforcement, the anode tube withstands internal/external pressure/impact without deformation.

Excellent flame-retardant performance：Professional testing shows that the oxygen index of many FRP anode tube materials can reach over 28%, and some high-quality products even exceed 30%. This means the anode tubes are difficult to ignite when exposed to fire, effectively preventing fire spread and providing strong guarantee for safe production, especially in industrial environments with high fireproof requirements.

High design flexibility：Customized for diverse applications and process requirements, FRP anode tubes can be tailored in diameter, length, wall thickness, and structural configuration, offering optimal solutions for everything from small-scale lab equipment to large industrial exhaust treatment systems.

Product Specifications

Pipe Diameter Specifications: In wet electrostatic precipitator (mist eliminator) applications, common regular hexagonal anode tubes have an inscribed circle diameter typically ranging from 250mm to 400mm, including standard sizes like 250mm, 300mm, 350mm, and 400mm, to adapt to equipment requirements of different scales.

Pipe Length Specifications: The pipe length can be flexibly customized according to actual equipment dimensions and process requirements. In general, the maximum length of anode tubes for wet electrostatic precipitators (mist eliminators) can reach 6 meters. Common standard lengths include 1m, 2m, 3m, 4m, 5m, and 6m, facilitating modular combination in different installation spaces.

Wall Thickness Specifications: The wall thickness of FRP anode tubes for wet electrostatic precipitators (mist eliminators) is typically about 3mm. This thickness ensures the structural strength and performance of the anode tubes while balancing material costs and overall equipment weight.

Product Parameters

Compressive Strength：The compressive strength of FRP anode tubes is typically closely related to their material formulation, forming process, and structural specifications, with typical values ranging from 100 to 200 megapascals (MPa).

Conductivity (Conductive Products)：The conductivity is achieved by adding conductive agents (such as graphite powder or carbon black, etc.) to the resin and using carbon fiber surface mat on the surface, with the conductivity being approximately 0.02 - 0.01 S/cm.

Temperature Resistance：Ordinary FRP anode tubes can withstand temperatures of about 60-80℃, while improved types (such as those using high-temperature resistant resins) can withstand 100-150℃.

Oxygen Index (OI)：The oxygen index of FRP anode tubes is usually above 28%, and that of some ordinary models can reach 33% or higher, generally belonging to non-combustible materials.

Application Scenarios

Power Industry：

In coal-fired power plants, FRP anode tubes serve as core components of wet electrostatic precipitators (WESP), efficiently collecting flue gas pollutants to help achieve ultra-low emissions.

Metallurgical Industry：

In steel and non-ferrous metal smelting, equipment with FRP anode tubes deeply purifies exhaust gases, reducing pollution and recovering resources.

Chemical Industry：

FRP anode tubes treat chemical exhaust gases and function as anodes in electrolysis processes (e.g., chlor-alkali chemical production), ensuring stable and efficient operations by leveraging corrosion resistance and conductivity.

Waste Incineration Industry：

They effectively remove fine particles and mist droplets from incineration flue gas, ensuring emission compliance in collaboration with other purification equipment.

Building Materials Industry：

Applied in dust removal equipment for cement plants and other facilities, FRP anode tubes purify dusty exhaust gases, improving working environments and enhancing economic benefits through material recycling.