As competition on cement market drives plants further development, each cement factory searches for new solutions, which could allow them to low operating cost, one of the solutions in the cement plants is reduction of primary fuel (pulverized coal) use, which increasing use of alternative fuel.
As competition on cement market drives plants further development, each cement factory searches for new solutions, which could allow them to low operating cost, one of the solutions in the cement plants is reduction of primary fuel (pulverized coal) use, which increasing use of alternative fuel.
One the Taiwan cement corporation (TCC) strategic objectives is allowing plant to substitute up to 50% even 80% of kiln heat demand by utilization of alternative fuels. Since many year TCC has been implementing multiple modernization projects resulting in better efficiency, automation, improved processes and economic effects. Use of RDF fuel (Refuse Derived Fuel) like biomass, waste cloth, shredded tires etc. allow plant to substitute primary fuel (pulverized coal).
Despite difficult epidemiological restrictions by China government, at our customer Taiwan cement Guigang city in Guangxi Province, China, the commissioning of belt dryer with hot gas piping has been complete in December 2022 by our partner. The high demand for alternative fuel is influencing quality deviations in deliveries, which forces TCC plant to utilize high moisture materials, to reach Alternative Fuel rate target. That’s the idea behind the installation of stela dryer was to:This drying system is integrated into the newly planned alternative fuel system which uses waste hot gas from grate cooler of kilns.
The successfully implemented commissioning and optimization of stela alternative fuel drier BT 1/6200-30 capable of utilization of sawdust, bark, wood chip and waste cloth. With maximum moisture content of 55%(50 as average) and corresponding input capacity of 21 t/h of wet product. Drier’s maximum capacity is approx. 12.4 t/h with 15% water content in dried material.
First of all, the main task of build stela drying system to replace coal fuel with refuse-derived fuel (RDF) and wood chips and achieve substantial savings in clinker manufacturing costs;
Secondly, improving use of alternative fuel by utilization of waste hot gases volume to obtain a higher specific calorific value of the alternative fuels and a possibility to substitute more expensive pulverized coal;
Thirdly, acquire a constant source of alternative fuels supply at competitive prices in comparison to the prices offered by other suppliers;
Finally, implement the first step to a long-term goal for TCC set up in the strategy in terms of using Alternative Fuel, i.e., achieve 50% Alternative Fuel substitution rate in heat consumption.
