cement industry is being greatly accelerated. On January 15,
2024, the Ministry of Ecology and Environment, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Finance and the Ministry of Transport, jointly issued the Opinions on Promoting the Implementation of Ultra-low Emissions in the Cement Industry, which clearly requires that
by the end of 2025, significant progress should be made in key areas. We will strive to complete the transformation of 50% of cement clinker production capacity, and large state-owned enterprise groups in the region will basically complete the transformation of organized and unorganized ultra-low emissions;
By the end of 2028, cement clinker production enterprises in key regions will have basically completed the transformation, and the whole country will strive to complete the transformation of 80% of cement clinker production capacity. The transformation of ultra-low emission in cement industry has been forced to speed up substantially.
The main indicators are that the hourly average emission concentrations of particulate matter, sulfur dioxide and nitrogen oxides in waste gas are not higher than 10mg/m ³, 35mg/m ³ and 50mg/m ³ respectively under the condition that the reference oxygen content of cement kiln and kiln tail waste heat utilization system is 10%. The improvement of
dust emission requirements has further improved the requirements of dust removal equipment in cement plants. Jin Wude, sales director of Haokai Filter Industry, told China Cement Network at the "2024 13th China Cement Industry Summit Main Forum and TOP100 Award Ceremony" that many enterprises now have their own dust removal facilities. From the existing technology, filter material products need to be considered from the aspect of filter material if they want to meet a higher emission requirement. The longer the running time of the
traditional needled felt filter material, the greater the resistance and the lower the working efficiency, resulting in excessive power consumption. In the fourth year after the traditional filter bag is put into use, the pressure difference at the kiln tail may increase to 200%, which greatly increases the operation cost of dust removal equipment.
The glass fiber membrane filter bag is used for surface filtration, which is convenient for dust removal, has low power consumption and longer service life, and also saves the cost of air source. In recent years, it has been more and more widely used in domestic cement industry.
Jin Wude introduced: "Our company mainly produces alkali-free glass fiber woven fabric coated filter bags, our products are relatively thin, so relatively speaking, dust is not easy to deposit.". After three or five years of use, the resistance will be relatively small compared with the needled felt, and the energy consumption will be relatively low. According to a study in the United States, if the pressure difference of a 5,000-ton kiln is reduced by 100 Pa a year, the electricity cost can be saved by more than 100,000 yuan, and if the pressure difference is reduced by 400 Pa, the electricity cost can be saved by 5.6 million yuan a year. Founded in 2006
, Haokai Filter Industry is a small and medium-sized scientific and technological enterprise in Zhejiang Province, which produces high-temperature glass fiber membrane filter bags, polyimide fiber filter materials, aramid fiber filter materials and other products, with more than 20 utility model patents. The products are widely used in cement kiln head and tail, steel, electric power and other industries, and have reached long-term cooperative relations with leading enterprises such as Conch Cement and Huaxin Cement .
It is understood that Haokai filter industry will also lay out metal filter bag business. The optimal reaction temperature of the denitration catalyst is more than 300 deg C, and an ordinary filter bag cannot tolerate such a high temperature, so the metal filter bag emerges as the times require under the background of ultra-low emission, has the advantages of high temperature resistance, corrosion resistance, long service life and high reliability, and can be widely applied to high-temperature dust removal in various industries.
