Research On The Recycling Efficiency In Every Link Of Pro Duct By FGD Double Alkali Method

Double alkali flue gas desulfurization system consists of the main aspects of the three, A good grasp of all aspects of the product recovery processing efficiency is the key to improve the desulfurization efficiency and product recycling。The reason for double alkali flue gas desulfurization system regeneration slurry separation and control for heavy metal, In order to improve the reuse of water, only so that it can ensure that the system links desulfurization absorbing solution to cycle reuse, Double alkali flue gas desulfurization, there is an important link in the oxidized slurry separation, the purpose of doing so is to ensure that the desulfurization slag resource utilization, which is a very important process;Including removal of desulfurization wastewater heavy metals is also very critical link in the flue gas desulfurization system at the same time the process of running across the street, its role can greatly reduce secondary pollution caused by the efflux desulfurization wastewater, which can be a conventional wastewater treatment process.This paper dealt with various aspects of the product in the flue gas desulfurization cyclone separation and flocculation and sedimentation the separation experiments form of method improve the regeneration slurry separation equipment processing effects, indicating renewable slurry has since condensed set of characteristics, cyclone separatorthe supernatant was difficult to achieve reuse absorption liquid containing solid rate indicators; flocculation and sedimentation can effectively improve the handling capacity of the separation equipment.Renewable slurry settling properties of the suspended particles in the flue gas desulfurization system, needs to be improved, so the mass distribution of the related research settling velocity, improve renewable slurry suspended particles settling properties. Regeneration of the pH of the slurry through research, found that the regeneration of the pH of the slurry flocculation and sedimentation performance, just have a different impact on different concentrations, which is the need to focus on the system running. For the flocculation system is running, find the relationship between the regenerated slurry the flocs settling velocity and the characteristic length; certain relationship between the amount of the settlement device surface load flocculant.Same time, in order to quantitatively describe the center member the overflow hole diameter, feed pressure of these parameters on the separation performance of the law, in accordance with the relevant theory to build equation, the purpose is to provide a forecast for the oxidized slurry separation means. To ensure the separation through a related experiment, the step-by-step analysis of the impact parameters to study their effect of separation, the results show that the added inside the cyclone center member, increasing the feed flow rate and equity ratio, improved separation effect, improve and concentrated efficiency.Wastewater treatment, using three methods of wastewater treatment hydroxide precipitation and sulfide precipitation and chitosan and trap, these three methods can effectively remove heavy metal ions, higher removal efficiency, but at the same time this three wastewater treatment method is different, especially polysaccharides trap method, more suitable for the desulfurization wastewater treatment.Recycled slurry of heavy metals as well as the removal of suspended solids, using chitosan synchronization removal method, and achieved certain results, and at the same time made a test on the reaction conditions and flocculation effect, this test is mainly developed polymer modified flocculationpolysilicate and chitosan composite flocculant agent, showed that the the composite flocculant can effectively improve the settling characteristics of the suspended solids, also inhibited the accumulation of heavy metals in the water.Studies have shown that recycling efficiency of the product of the dual-alkali FGD difficult for renewable liquid separation, as well as heavy metals accumulated solution; oxidized slurry cyclone separation efficiency has also been improved,improved desulfurization wastewater treatment method for dual-alkali FGD improved dual-alkali FGD system water cycle process.