Blast furnace gas purification technology
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Recently, two-stage boilers have been shut down in many areas of Jiangsu, as desulfurization and denitrification are required. What I want to ask is that in the future, blast furnaces will surely need to be more environmentally friendly, with purification technologies being developed; so what are the purification problems that still cannot be solved at present? Phenol water? Tar? Or something else? **What are the latest pollution emission standards? What is the difference compared to international standards? Can these secondary pollutants caused by gas generators be completely eliminated? Is it really environmentally friendly?
It’s mainly a problem with coal: low-grade coal has a high volatility content, which results in many by-products and makes water treatment difficult. Moreover, gasification is carried out at atmospheric pressure, leading to high energy consumption.
Recently, in many areas of Jiangsu, two-stage furnaces have been shut down, with requirements for desulfurization and denitrification... phenol water? Tar? .... Can these secondary pollutants caused by gas generators be completely eliminated? ...... Two-stage furnaces generally use cold gas, and the carbon conversion rate in this type of furnace process is low (tar is released during low-temperature distillation). Such furnaces cause significant secondary pollution; in addition to water pollution, air pollution is even more severe, with odors (VOCs) detectable from hundreds of meters away. All of these factors can contribute to cancer development. The solution is: high-temperature gasification improves the carbon conversion rate ； Utilization of hot gas combustion. This can eliminate the secondary pollution caused by phenol water and tar. Vaporizing carbon molecules can achieve this goal.
Take a look at the requirements regarding pollutant levels in water outlined in the latest standards 31570 and 31571
Are there any practical application examples? ? I’ve never heard of such technology
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