Rigorous new regulations in coal-fired pollutants emissions from power plant strengthen the requirements for electrostatic precipitator (ESP) technology. The study was inspired by the requirement to use the new composite collectors as substitutes for typical steel collector to save energy and structural materials. A bench scale and a pilot scale experimental system have been set up to investigate the performance of the novel wet composite collector. Contrastive collection efficiencies of different assembled modes were investigated. The removals of coal-fired pollutants including acid aerosol, ammonia aerosol, slurry droplets and fine particles were performed in new wet ESP, as well as to quantify the key properties of the new wet ESP. The results show that the collection efficiency of the new composite collector was higher than that by typical collectors using a thimbleful of water penetrating the surface via capillary flow. The new wet ESP device acts in synergy with WFGD and SCR systems for controlling coal-fired pollutants emissions and solves the adverse impacts caused by wet flue gas desulfurization (WFGD) and selective catalytic reduction (SCR) systems at the same time.
Based on the principle of thermal balance and materials balance in lime furnace, a calculation model used for on-line testing the resolution ratio of baked limestone in lime furnace is conducted by using of parameters that can be measured in spot. For a lime furnace in operating, the resolution ratio of baked limestone can be predicted on time by this model when mass input of limestone, coke ratio, air flux, concentration of carbon dioxide in outlet, temperature of flue in outlet and temperature of output lime are measured in-line. The calculation model has been testified with actual parameters and proved to be operable.
Based on the nickel smelting process in the smeltery of a corporation, a real time monitoring system of process parameters acquisition is developed, which makes full use of the choice of equipment, the telecommunication technique of PLC, and the data processing technique to carry on display of the technological parameters, data communication, alarm of demarcation line and tendency analysis etc. The system provides an efficient monitoring and analyzing in the production process for management and operation personnel and enhances the management level of modernization.
The energy consumption of thermal generation of activated cokes (ACs) loaded with SO2 was analyzed. The ACs regeneration process can be divided into four stages, and the stage of ACs’ temperature rising from water boiling point to regeneration temperature consumes about 50% or even more energy of the entire process. The ACs’ moisture adsorption ratio or the moisture content might be the critical factor which influences the total energy consumption. Reducing the moisture content of ACs by increasing operation temperature of FGD, choosing a proper regeneration temperature and recycling waste heat to dry ACs would be effective methods to decrease energy consumption of ACs regeneration process.
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