Dust pollution is a non-negligible issue in industrial production. It not only severely damages the environment but also endangers the health of workers and affects the normal operation of production equipment. To effectively address dust pollution, dust removal and filtration equipment have emerged. As the core component of such equipment, the performance of dust filter bags directly determines the effectiveness of dust removal. Among various materials for dust filter bags, Polyphenylene Sulfide (PPS) stands out with its excellent properties, becoming a reliable guardian in the field of industrial environmental protection.
Characteristics of PPS Material
PPS is a high-performance special engineering plastic with a series of outstanding properties, making it highly suitable for manufacturing dust filter bags.
High Temperature Resistance
PPS material has a relatively high melting point, usually around 285°C, enabling PPS dust filter bags to operate stably in high-temperature environments. Generally, they can be used continuously at 190°C and withstand a maximum instantaneous temperature of 230°C. This excellent high-temperature resistance makes them perform exceptionally well in handling high-temperature flue gas. For instance, in high-temperature industrial scenarios such as coal-fired boilers, cement rotary kilns, and waste incinerators, PPS filter bags can effectively filter dust without deformation, aging, or damage due to high temperatures, ensuring the long-term stable operation of the dust removal system.
Chemical Corrosion Resistance
PPS exhibits strong resistance to acids, alkalis, salts, and most organic solvents. In industrial production, many flue gases contain various corrosive gases and chemical substances, such as sulfur dioxide (SO₂), nitrogen oxides (NOx) in the flue gas of coal-fired power plants, and sulfuric acid mist, hydrochloric acid gas in the flue gas of the chemical smelting industry. PPS dust filter bags can maintain their structural and performance stability in such complex and corrosive environments, effectively resisting the erosion of chemical substances. This significantly extends the service life of the filter bags and reduces equipment maintenance costs.
Good Mechanical Properties
PPS fibers have high strength and modulus, with mechanical properties similar to those of polyester fibers. This means that during the use of PPS dust filter bags, they can withstand significant pressure and friction, and are not prone to breakage or damage. In the process of pulse cleaning and other operations, filter bags need to withstand the impact and friction of airflow frequently. The high mechanical strength of PPS material ensures that the filter bags can withstand these tests and maintain good filtration performance.
Flame Retardancy
PPS is inherently a flame-retardant material, with a limiting oxygen index (LOI) ≥ 34, making it difficult to burn. In some industrial environments with fire risks, such as the waste incineration power generation industry, the flame retardancy of PPS dust filter bags is particularly important. They can effectively prevent the spread of fire in case of a fire, reducing the harm to equipment and personnel and ensuring production safety.
High Filtration Efficiency
PPS dust filter bags are manufactured using advanced processes. The fiber structure is dense, and a three-dimensional structure formed by processes such as needling endows them with good porosity and air permeability. This structural feature enables the filter bags to effectively capture and intercept tiny dust particles. The filtration efficiency for dust particles larger than 0.1μm can reach over 99%, meeting strict environmental protection emission standards. They can efficiently remove dust particles from flue gas, significantly reducing the flue dust emission concentration and improving environmental quality.
