Possibility Research Of TPCC 2×287MW Boiler Wet Limestone Flue Gas Desulphurization Engineering Technique

SINOPEC Tianjin Branch to be built 1 million t/a ethylene and oil refining integration projects, according to item's design the existing coal-fired boilers of thermal power plant designed to implement gas desulphurization project. The text is research for second phase of 2 x 287MW power boilers desulphurization of a desulphurization technology research and analysis.Sulfur dioxide by introducing human, social, environmental hazards and sulfur dioxide governance of the world, expounded on the need for coal-fired power plant desulphurization necessity. Through foreign and domestic desulphurization technology development study for the thermal power plant of TPCC project that it integration removal desulphurization made the best desulphurization technology programmers -- limestone (lime) - gypsum wet desulphurization. And the programmer of desulphurization principles, crafts design, equipment processes, environmental and economic evaluations is conducted detailed elaboration.Limestone (lime) - gypsum wet desulphurization processes which is the world's most widely used gas desulphurization. It lime or limestone used for desulphurization absorbent, the nitrification added lime powder into water absorbent. In absorption tower, absorbent sap mixed with the smoke exposure, the SO2 gas and calcium carbonate or calcium hydroxide drum into the air for chemical oxidation reactions, and ultimately response to the product gypsum. The gases after desulphurization take out of the small drip and removed by heating warming heaters after being chimneys. Gypsum is dehydrating devices dehydration before recovery. The processes apply to any of the sulfur content of coal gas desulphurization, could reach more than 95% desulphurization efficiency. All the methods of physics and chemistry desulphurization process of absorbing a detailed study, and the impact of various factors such as the desulphurization efficiency gas SO2 concentrations, liquid gas than, the pH value, length of stay, such as the absorption characteristics analyses responses on the practical application of the methodology value.Final, the text is research that system desulphurization processes and processes to conduct a preliminary design and calculation, and also to evaluate the environmental and economic nature for the thermal power plant to use limestone- gypsum wet desulphurization law.