Spray cyclone bed type gas liquid solid tri-phase reactor

Abstract

The invention relates to an injection cyclone bed gas-liquid-solid reactor, wherein it uses several circulate pumps, to pump out the slurry of slurry pool, to be accelerated by circulate pumps to form several high-speed flows and injected into the slurry pool at the circumference; then rotates the whole slurry pool. The invention can avoid using mixer, and the whole flow field is stable, to control the selection of solid particles easily. And the oxidization air is poured in the injector; the liquid and gas have large speed difference; the high-speed will break the bubble, to mix the liquid and gas fully, and improve their reaction; the gas forms screw track in slurry pool, to prolong its stay time in pool and improve the oxidization air utilization.

Description

technical field [0001] The invention belongs to the technical field of three-phase reactors, and in particular relates to a jet swirl bed type gas-liquid-solid three-phase reactor used for a large-scale wet flue gas desulfurization slurry pool. Background technique [0002] Wet desulfurization completes SO in the absorption tower 2 The absorption of SO is completed in the slurry pool 2 oxidation and curing. The slurry tank is an important part of the gas-solid mixture to absorb gas. It undertakes important tasks such as the separation of gas and absorption liquid, the neutralization of absorption liquid, the oxidation and crystallization of gypsum, and its operation directly determines the mass concentration and chemical reaction of the absorption liquid. The status of the process and the quality of the discharged material. [0003] The main functions of the slurry tank are: preparation of slurry: fresh limestone powder (or limestone slurry) and fresh water for supply nee...

AI Technical Summary

Problems solved by technology

For boiler units above 300MW, the diameter of the blades of the agitator is 10 meters or even more than 15 meters, which not only has a heavy structure, but also brings certain difficulties to the arrangement of the absorption tower above the slurry tank. At this time, the absorption tower and slurry must be used. The eccentric layout of the tank is not concentric, or the double tower structure must be adopted; the number of agitators can be increased by using the side wall mechanical stirring method, but the flow field in the entire slurry tank is very complicated, and it is difficult to take into account the problem of solid phase separation. Moreover, the stress condition of the slurry tank wall is not good, and at the same time, the seal between the rotating shaft and the slurry tank wall is difficult, and slurry leakage often occurs

[0005] The main disadvantage of this kind of reactor is: due to the separation of solid phase, the flow rate of mechanical stirring cannot be as high as about 50r / min, the bubbles of oxidizing air are basically in a state of free floating, and the gas-liquid mixing is not enough Strong, the oxidation reaction speed is relatively slow, and once a failure occurs, the utilization rate of the oxidation air is lower than 30%; the desulfurization tower is a large-scale reaction device, and when the mechanical agitator is large-scale, the structure is bulky, difficult to arrange, and the failure rate is high. Maintenance is inconvenient and must be shut down for maintenance

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