Research On Optimal Design Of Energy Saving And Emission Reduction For Wet Limestone-gypsum FGD System

Limestone-gypsum flue gas desulfurization (FGD) technology is the most widely used desulfurization technology, along with the increasing requirements of environmental protection, limestone-gypsum desulfurization device is continuous and stable and reliable operation is particularly important. This paper focuses on energy saving and emission reduction, making a study on optimization design for energy saving and emission reduction of limestone-gypsum wet desulfurization device, to create benefit for enterprise and society. The main results are as follows:1The energy-saving program optimization of dual-louvered damper’s sealStudy on the program of utilizing the original flue gas to heat the sealing wind, elaborated the theoretical calculation of sealing air volume, heat exchanger and heat balance. Compared with the programs of electric heating and steam heating, the program of gas-gas heat exchanger had the advantage of system configuration, investment and operating cost, summarized the deficiencies of the program and put forward the improvement measures.2Study on energy saving of wet flue gas emissionSeveral kinds of wet flue gas discharge technology were analyzed from these aspects of the technical level, investment and operating cost. And taking a sintering FGD project of320m2scale as an example, the chimney height, gas velocity, structure, material and heat preservation was analyzed. Enumerated the engineering application performances of the straight platoon chimney, and put forward the technical problems and solving measures.3Research on comprehensive utilization of desulfurization waste waterMethod of spraying the desulfurization waste water into the front of the dust remover to evaporate was studied, from various aspects such as the desulfurization waste water’s quality, characteristics of nozzle, droplet evaporation time, the influence on the precipitator and desulphurization system, and taking the300MW desulfurization project as an example, the method of economic benefit and engineering application was analyzed.