Energy saving and environmental protection
  • Wet dust removal (slag/sintering/rolling mill)


    Application of wet dust removal technology 1. Environmental protection policy requires China Environmental Protection Industry Association to issue the "Technical Guidelines for Ultra-low Emission Transformation of Iron and Steel Enterprises" on January 9, 2020, which clearly proposes that rolling mill dust removal facilities should be built. The Ministry of Ecology and Environment and other five ministries and commissions jointly issued the "Opinions on Promoting the Implementation of Ultra-Low Emissions in the Iron and Steel Industry" (Huanqiqi [2019] No. 35), requiring steel enterprises across the country to gradually transform and significantly reduce emission levels. In June 2020, the Ministry of Ecology and Environment issued (extremely urgent) "Technical Guidelines for Formulating Emergency Emission Reduction Measures for Key Industries in Heavy Pollution Weather" (Huanqiqi [2020] No. 340). High-efficiency wet dust collector is used for waste gas from hot slag an

  • Heating furnace hydraulic potential energy recovery


    Stepping machinery occupies a large proportion in the metallurgical industry, and a large amount of "potential energy" released by these equipment during the descending process is converted into heat and "wasted"; the potential energy recovery technology developed by Shanghai Xuanding Technology is the most representative. Innovative technology can achieve energy saving of 30~60%; compared with the potential energy recovery solutions provided by other companies, Shanghai Xuanding's product features are as follows: 1. The potential energy cylinders involved in the system are all general-purpose hydraulic cylinders, no special customization is required, and the rest involve The hydraulic components, accumulator group, etc. are all conventional models, and the procurement of spare parts is convenient;

  • Integrated treatment of flue gas desulfurization, dust removal, and denitrification in heating furnaces


    The integrated treatment of desulfurization, dust removal and denitrification is the effect of flue gas end treatment and new technology prospects. In the production process of iron and steel enterprises, according to the needs of the overall energy medium balance, various energy media such as blast furnace gas, converter gas, and coke oven gas will be used in various Various types of kilns, such as hot blast stoves, power plant boilers, rolling mill heating furnaces, etc., during the production process of kilns, the flue gas will contain sulfides, nitrogen oxides, dust and other pollutants; according to the requirements of national environmental protection policies , various provinces, cities and regions are successively carrying out the control of flue gas pollutants;

  • Heating furnace low nitrogen combustion


    Apply natural gas, mixed gas and other low-nitrogen burners, nitrogen oxides ≤ 50-75PPM; use regenerative low-nitrogen burners, nitrogen oxides ≤ 50PPM; Shanghai Xuanding self-developed low-nitrogen burners, all through temperature field simulation , CFD calculation and analysis, and carry out prototype laboratory tests, and those who pass the indicators will be mass-produced for industrial applications; low-nitrogen burners are installed in the laboratory. Indicator test

  • Heating furnace gas blowback


    Gas backflushing is CO emission reduction technology 1. Current situation and problems Regenerative combustion technology has been widely used in various types of industrial furnaces. This combustion technology can make low calorific value gas such as blast furnace gas, producer gas, etc. It is used for billet heating without mixing other high calorific value gas, and the regenerative combustion technology can realize extremely low temperature emission of flue gas, realize waste heat recovery to the greatest extent, and achieve energy saving effect. However, the heating furnace applying the regenerative combustion technology generally has the following problems: as shown in the figure, every time the reversing valve switches, when a group (side) burner changes from the combustion state to the smoke exhausting state, the reversing valve reaches the storage state. The gas between the hot burners will be pumped away by the smoke exhaust system, and this area is called the "public area" (t

  • Blast Furnace Gas Equal Pressure Recovery and Air Discharge


    1. Production status and environmental protection requirements In the blast furnace smelting production process, the pressure-equalizing gas in the furnace top tank is usually discharged directly into the atmosphere after passing through the cyclone dust collector and the muffler. This part of the gas is toxic and contains a lot of CO and dust. , The mixed gas of combustibles causes pollution to the atmospheric environment, especially the blast furnace production area, and also wastes energy. With the increasingly strict environmental protection requirements, most regions and iron and steel enterprises now require the use of full recovery methods, and the blast furnace gas is not released during the whole process; 2. Basic principle equalization recovery part (full recovery): The pressure is consistent with the pressure in the furnace and is in a high pressure state, while the pressure in the gas recovery device connected to the atmospheric gas pipe network is in a normal pressure stat

  • Blast furnace gas fine desulfurization


    With the increasingly strict national environmental protection requirements and the continuous introduction of relevant environmental protection policies and indicators, the Ministry of Ecology and Environment and other five ministries and commissions jointly issued the "Opinions on Promoting the Implementation of Ultra-Low Emissions in the Iron and Steel Industry" (Huanqiqi [2019] No. 35), Hebei and Shandong , Shanxi, Henan and many other regions have successively put forward requirements for ultra-low emission of sulfides. The above clearly pointed out that blast furnace (coke oven) gas should adopt source fine desulfurization technology; Shanghai Xuanding has successfully completed the source fine desulfurization of blast furnace gas through years of accumulation. At the same time, combined with the excellent index effect of the existing use cases of related processes and materials, Xuanding launched the "Blast Furnace Gas Catalytic Absorption Multistage Desulfurization Technology";


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