| The emissions resource of sulfur dioxide is a serious environmental problem, while power Enterprises are the main reason for it. How to control sulfur dioxide emissions is very important factor to govern power environment. In the present, Limestone-gypsum is a flue gas desulphurization process which is the most mature technology, the most useful results, and the most stable of operating conditions. Oxidation is an important chemical process of limestone-limestone wet desulphurization. In general, the enterprises used controlled oxidation, which is the use of forced oxidation methods to control the oxidation rate about 95%.Most of forced oxidation systems used blowers or air compressors as a forced oxidation air power source, and also stirring device. However, these methods have some disadvantages such as complex devices, the use of low oxygen, high running costs, infrastructure investment, and maintenance and management problems. To solve this problem, this paper proposes that Jet aeration technology is applied to the slurry oxidation desulphurization,so as to gather the aeration and mixing in integral whole, which is of great engineering significance.This paper relies on the national "Eleventh Five-Year" Technology Support Program Project (2007BAC24B01) sub "desulphurization process development limestone slurry jet", by optimizing the structural parameters of the jet aerator to increase the suction capacity, numerical simulation experiments is used to determine the best installation, aeration and mixing to achieve set in one of the experimental device, and an environmental company in Chongqing has verified the overall performance. The main results are as follows:①The design principles of structural parameters of the jet aerator are studied, and the main impact parameters of performance jet aerator are obtained, including the nozzle diameter d1, suction chamber diameter d2, pipe diameter d3, nozzle-to-throat Lc, pipe length L and the length of diffusion tube formula and structure of LD parameter values.②The inspiratory capacities of Jet aeration are tested under different conditions, such as nozzle-to-throat, area ratio and the ratio of the length of the diameter. Under the condition of experiment parameter that circulating pump flow was 16 m3/h and pressure was 0.3 MPa, the optimal structure parameters are the hose nozzle 15 mm, area ratio of 3.7, the nozzle diminishing-angle of 13°, the aspect ratio of 6 pipes. It can be also calculated that wind speed is about 5 m/s, single inspiratory capacity of jet aerator is 12.72 m3/ h.③According to the site conditions, which slurry tank height of 1.4 m, diameter of 1.5 m, export diameter is 80 mm, entry diameter is 50 mm, using UG mathematical model, based on the numerical simulation results obtained from CFX software, the installation of Jet Aerator number three, perpendicular to the tower wall, mounting height are 0.8m, this case, the effect of slurry mixing tank is ideal.④In the practical experiments, in the condition of jet aerator inlet velocity of 5.23 m/s, the total inspiratory volume of field experiment is 59.52 m~3/h, and the oxidation of the slurry through the jet after 2 hours, calcium sulfite oxidation rate is above 85%. |
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