This product utilizes custom-formulated ceramic fiber cotton with high alumina content, which strictly controls impurities beyond alumina and silica. It specifically eliminates contaminants such as Na, K, Mg, and Ga​ that are prone to causing vanadium-titanium catalyst poisoning and deactivation​.

The high-alumina characteristic​ ensures the ceramic filters exhibit exceptional high-temperature resistance, while the low-impurity feature​ prevents the nano-catalyst from being easily poisoned and deactivated, thereby maintaining its activity.

• • Al ₂O ₃ > 45-48%
  • SiO ₂  > 51-54%
  • Al ₂O ₃+SiO ₂   > 99.6%
  • Na、K、Mg、Ga  < 0.3%

The processing of ceramic fiber raw cotton utilizes nationally patented technology with independent intellectual property rights. This proprietary process ensures uniform fiber length distribution, compliant fiber diameter, and low shot content in the resulting ceramic fiber material.

Precisely Controlled Physical Parameters​ (e.g., length distribution, diameter range) of the ceramic fibers guarantee uniform spraying and prevent agglomeration during the formation of the ceramic filter coating. It enhances the strength of the filter tubes, and ensures the uniformity of the laminated pore structure​ as well.

Comprehensive testing of raw materials is conducted for parameters such as fiber diameter, length distribution, shot content, and bulk value. The inspection process covers raw material receiving, in-process sampling, and post-processing centralized inspection​.

• • Ceramic Fiber Diameter: 2.5-3.5um
  • Fiber Shot Content（212um）: <​ 8-15%
  • Bik Value：200±40

Bik Value is a key indicator for measuring fiber dispersibility and slurry-forming capability. It refers to the volume of a unit mass of fiber under specific conditions, reflecting the fiber's loftiness and ability to form a slurry. A higher value indicates fluffier fibers and better dispersion

Ceramic filters are formed using external molds. The outer surface retains the impression marks from the mold, which enhances the adsorption efficiency of desulfurizing agents and prevents particles from penetrating the tube surface, thereby reducing clogging risks.

The pore size of the external mold gradually increases from the exterior to the interior, facilitating efficient cleaning via reverse blowing. This design not only improves purification efficiency but also reduces operational costs.

The axial lamination molding process employs centrifugal force to uniformly layer fiber slurry, ensuring even wall thickness distribution (without agglomeration). The final product comprises over 100 laminated layers, guaranteeing high mechanical strength.

The filter exhibits a porosity >80%, with ceramic fiber laminated pore sizes ranging from 25–45 nm. The pressure drop remains <300 Pa​ (at 1 m/min airflow)

While a single layer of filter material has micron-scale pores, the uniform stacking of over 100 layers achieves nanoscale pore structures. This not only enhances the filter's strength but also enables ultra-efficient filtration of millimeter-, micron-, and even submicron-sized particles.

The nanoscale pores significantly prolong the flue gas residence time​ within the filter tube, providing a critical foundation for high-efficiency denitrification in catalytic filter systems

Precision grinding strictly controls the flatness of the flange​ to ensure uniform stress distribution during operation. Flange flatness directly affects whether the installed filters bear loads evenly. Filters under uneven stress are prone to fracture at the points of maximum pressure, compromising service life and filtration performance.

The flange and the adjacent 150–200 mm section of the tube are the most vulnerable areas prone to fracture during use. With a flange thickness of 30 mm, conventional curing typically achieves a depth of less than 10 mm (often only 6–8 mm), leaving a 10–15 mm uncured "core" in the center. This results in insufficient flange hardness and increased risk of operational damage. Our ceramic filters employ deep curing technology, reducing the uncured core to <10 mm (typically 5–8 mm), significantly enhancing flange strength and extending service life. Additionally, the front end of the flange, which withstands significant reverse-jet stress, undergoes the same deep curing process to prevent severe internal wear from long-term pulsed cleaning.

C-ring strength​ is measured by cutting a 50 cm ring sample from the ceramic filter, creating a C-shaped specimen with an approximately 50° opening. The maximum pressure required to crush the sample under radial compression is recorded.

The industry standard for ceramic filters requires a minimum C-ring strength of ≥0.35 MPa. Compared to the industry's average and maximum C-ring strengths, Our ceramic filters guarantee a minimum C-ring strength exceeding 0.4 MPa, which is 14% above the standard requirement​.