Circulation fluidized bed swirl-direct flow composite fluidizing device

Abstract

The present invention belongs to the field of industrial waste gas purifying technology, and is one circular composite swirl-uniflow fluidizing device for fume desulfurizing fluidized bed. The fluidizing device includes an inlet fume channel, a Venturi tube, a reducing section and a desulfurizing barrel connected successively from bottom to top, and features that it includes also an inner sleeve installed inside the Venturi tube and a swirl fluidizing unit installed between the inner sleeve and the Venturi tube. Partial fume flows inside the inner sleeve and the rest flows in the swirl fluidizing unit, so as to form the composite fume fluidizing comprising the uniflow fluidizing inside the inner sleeve and swirl fluidizing outside the inner sleeve. The composite fluidizing device has simple structure, less gas flow deflection, high fluidizing effect, long grain retaining period, great inner circulation multiple and high desulfurizing efficiency.

Description

technical field [0001] The invention belongs to the fields of industrial waste gas purification, environmental protection and chemical industry, and in particular relates to a circulating fluidized bed swirling and direct current composite fluidization device for flue gas desulfurization. Background technique [0002] Currently used in flue gas desulfurization devices, a circulating fluidized bed fluidized by a Venturi tube is commonly used. The Venturi tube includes a Venturi tube throat and a diverging section. This kind of circulating fluidized bed has small resistance loss and large flue gas treatment capacity, but the disadvantage is that there is only one stream of flue gas in the center as a fluidized straight jet. For example, "a circulating suspension bed dry flue gas desulfurization process and its system" disclosed in the Chinese patent application number 00128285.9. structure. Usually, the flue gas is introduced into the vertical channel of the desulfurization ...

AI Technical Summary

Problems solved by technology

Usually, the flue gas is introduced into the vertical channel of the desulfurization tower from one side of the desulfurization tower through the horizontal flue, which will cause the deflection of the airflow, affect its uniformity in the desulfurization tower, and cause the sticky wall on the side of the desulfurization flow. The traditional circulation Even if the fluidized bed uses guide vanes, it is difficult to avoid the above situation; at the same time, in order to ensure the desulfurization efficiency, a higher particle concentration in the tower is required, which requires a longer residence time and a higher internal concentration of the particles in the desulfurization tower. Circulation ratio, while the traditional Venturi tube fluidization method of circulating fluidized bed is difficult to achieve the above requirements

Images