Design And Research Of A Jet Bubbling Reactor Using Vertical Spiral Sieves For Dust Removal And Desulfurization

In the near term, the situation of using coal as the most important primary energy is difficult to change in our country, But the dust and sulfur dioxide pollution which come from coal is too many and dangerous; The government try hard to control the pollution of coal by the way of implementing a set of measures such as legislation etc. in several decades, but the sulfur dioxide pollution is also severe. So the research and innovation of controlling the sulfur dioxide pollution is also urgent. Research and development of the new type tower for dust removal and desulphurization is important, Then the result will enhance the level of independent desulphurization tower. innovation in our country.After analyses and comparing several kinds of desulphurization technology related, Results show that Jet Bubble Reactor has particular advantages and good prospect and the Archimedes'spiral vertical sieves in chemical industry has many advantages such as a simple and compact structure,a large hole area,a less possibility of blockage and even distribution of gas flow streams. In the research, a jet bubbling reactor using vertical spiral sieves for dust removal and desulfurization was design, It inosculates the advantages of Jet Bubble Reactor and the Archimedes'spiral vertical sieves.The entire process of innovative design was described in the article, The main content of design include spiral air chamber,gas inle,pneumatic stirrer with pontoon grid hole,support bar etc.; The unique spiral gas chamber was consisted of two perforated vertical plates which were designed in an Archimedes'spiral; The pneumatic stirrer with pontoon was consisted of the hollow steel pipe,rig and paddle.The pressure drop of the JBR at various gas flow rates was also measured, and the performances for flue gas desulphurization and dust removal were evaluated. Results showed that the tower possesses several kinds of distribution such as spiral gas distribution circulation gas distribution pneumatic stirrer and jet bubbling. The pressure drop in each part of the JBR increased with an increase in gas flow in no-load test and load test. The total pressure drop of the tower in load test was 3.37 kPa, when the flow gas was 1856 m3·h-1. The desulphurization efficiency increased with an increase in the height of bubbling layer or in rotational speed of the pneumatic stirrer with pontoons. When the concentration of limestone in absorption slurry was increased, both the pH value and the duration of the slurry for desulphurization at high removal efficiency increased. The pH value of the slurry was critical for sulfur removal. The desulphurization efficiency was 70% at a pH value of 5.35, and exceeded 80% when the pH ranged from 6 to 7. When the dust concentration in flue gas is above 304 mg·m-3 (grain diameter less than 50μm), dust removal efficiency exceeded 91%. The JBR with high removal efficiencies of sulfur and dust and low height as well as compact structure has the potential for industrial applications.