of 2026, the Ministry of Ecology and Environment said at a press conference that the ultra-low emission transformation of 100 million tons of cement clinker production capacity would be completed in 2026. With the acceleration of green upgrading in the cement industry, ultra-low emission will soon become the standard of domestic cement enterprises.
Cement industry continues to promote ultra-low emission transformation, dust, sulfur dioxide, nitrogen oxides-three major pollutants in the treatment, nitrogen oxides is undoubtedly the most difficult bone to gnaw. SCR has become a necessary option for nitrogen oxide treatment in cement enterprises in order to meet the requirement of ultra-low emission for nitrogen oxide emission concentration less than 50 mg/m ³. Zhai Xiaoyi, sales director of
Zhejiang Haokai Filter Industry Co., Ltd. (Hereinafter referred to as Haokai Filter Industry), said that at present, there are four main implementation paths of SCR denitrification in cement industry. Namely: high temperature and high dust SCR, high temperature and medium dust SCR, high temperature and low dust SCR, low temperature and low dust SCR.
Among them, high temperature and low dust SCR has the best protection effect on the catalyst, without catalyst blockage, poisoning failure and other problems, and has high reaction efficiency, stable operation and long service life, which is the most reliable technical direction of nitrogen oxide treatment in the current industry. The technical advantages of
high temperature and low dust SCR are obvious to all, but it puts forward higher requirements for the high temperature dust removal link-the filter material must operate stably in the high temperature environment of 280 ℃, and effectively filter the dust particles in the flue gas, so as to provide a "clean" flue gas environment for the subsequent denitrification reactor.
This requirement is not simple. The flue gas at the end of the cement kiln has high temperature, complex composition and strong corrosiveness, so the filter material not only needs to be resistant to high temperature and corrosion, but also needs to have good passability, so as to reduce the system resistance and the cost of environmental protection.
Haokai Solution: High Temperature Dust Removal Accurately Adapts to SCR Demand
In the face of the stringent requirements of high temperature and low dust SCR for dust removal, Haokai Filter Industry takes metal fiber felt filter bags as the core, providing cement enterprises with more adaptable solutions. High temperature
resistance, corrosion resistance, stability and reliability. Haokai metal fiber felt filter bag is made of 316L, Fe-Cr-Al and other high-quality alloy materials, which can operate stably for a long time in the high temperature environment of 250-600 ℃. The alloy material itself has excellent resistance to chlorine and fluorine ion corrosion, which can calmly cope with the complex corrosive conditions caused by co-disposal, and provide stable and reliable dust removal guarantee for high temperature and low dust SCR system. Low
resistance, high precision and system efficiency. The filter bag adopts a gradient fiber layer structure with high porosity and low filtration resistance. While realizing the ultra-low emission of dust emission concentration ≤ 5mg/Nm ³, it maintains stable operation resistance, greatly reduces the energy consumption of the fan, and ensures the overall operation efficiency of the denitration system.
Customized optimization, accurate adaptation to complex working conditions. Different cement enterprises have different production line scale, co-disposal type and flue gas working conditions, and the "one-size-fits-all" standardization scheme is difficult to meet the differentiated needs. Haokai Filter Industry can customize the specifications and materials of filter bags according to the complex working conditions of different enterprises, realize the precise adaptation of "one enterprise, one scheme", and effectively improve the adaptability and later operation stability of metal filter materials in different enterprises.
According to Zhai Xiaoyi, at present, Haokai metal fiber felt filter bag has been successfully applied in high temperature and low dust SCR denitrification system of many cement enterprises. From the feedback point of view, the product not only helps enterprises to pass the acceptance of ultra-low emission of nitrogen oxides smoothly, but also greatly reduces the failure rate of dust removal links and reduces the cost of operation and maintenance.
Looking forward to the future, Haokai Filter Industry will continue to cultivate the field of high temperature dust removal in cement industry, continuously optimize the performance of metal fiber felt filter bags, further enhance the ability of high temperature resistance and corrosion resistance, and reduce operating energy consumption; At the same time, we will improve the customized service system to provide cement enterprises with full-chain services from product selection, scheme design to installation and commissioning, after-sales operation and maintenance, and help the industry to steadily promote SCR denitrification transformation.
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