May 20 2010
Ningbo Taiji Environmental Protection Equipment Co., Ltd. (TAIJI)'s FGD (Flue-gas desulfurization) technology was officially put into operation, successfully being used in 230 m2 sintering.
For the project, TAIJI chose to use steel slag as an absorbent instead of lime or other absorbents traditionally used in desulfurization. In comparison to the use of lime agents, the replacement reduces SO2 emissions by more than 6600 tons and carbon CO2 by more than 4600 tons, equivalent to savings of RMB 3 million and 8000 tons of lime desulfurization agents.
TAIJI's core offerings center on the breakdown of industrial solid waste pollutants. Using a desulfurization multi-phase reactor, steel, nonferrous metallurgy, thermal power, residue from chemical and other industries, fly ash, zinc oxide, carbide, white clay, red mud and other absorbents of sulfur dioxide solid waste are employed to create a more efficient desulfurization process, as well as to transform desulfurization by-products into alkaline sand.
According to statistics, China produced more than 600 million tons of steel in 2009, resulting in 100 million tons of steel slag emissions and 24 million tons of SO2 emissions. Approximately 90% of current desulphurization technology uses limestone or lime gypsum to absorb SO2. For every 10 million tons of SO2 that are absorbed, 30 millions of steel slag are used, reducing CO2 emissions by seven million tons, reducing the use of lime by 12 million tons, and saving desulfurization businesses 4.2 billion RMB in production costs. At the same time, the waste residue that is produced can be used to modify 80,000 hectares of saline-alkaline land.
Source: http://www.epchina.com.cn/