Multilayer fluidized bed parsing device for conducting pneumatic material return through row tube type heat exchange and coupling of molten salt

Abstract

The invention discloses a multilayer fluidized bed parsing device for conducting pneumatic material return through row tube type heat exchange and coupling of molten salt. The multilayer fluidized bed parsing device comprises a screw feeder (6), a multilayer fluidized bed (1), a slag cooler (8), a separator, a heat exchanger (10), a heat supply device, a water vapor generating unit and a spraying unit. The multilayer fluidized bed parsing device has the advantages of being high in heat transfer efficiency, high in plot ratio, even in heat exchange, controllable in stay time and the like and has an obvious advantage on the aspect of small granular activated coke compared with a traditional technology.

Description

technical field [0001] The invention relates to the regeneration and utilization of industrial pollutant purifiers, and is particularly suitable for the regeneration and recycling of industrial flue gas purifiers such as activated coke and activated carbon. Background technique [0002] Adsorbents such as activated carbon or activated coke are widely used in the adsorption and removal of industrial pollutants due to their rich specific surface area and developed pores. For example, activated carbon removes organic gases such as industrial VOCs, and activated coke removes sulfur dioxide and nitrogen in industrial flue gas. Oxygen compounds, mercury and other heavy metals. Due to the existence of pollutants blocking the micropores on the surface of the active coke, the adsorption capacity of the adsorbent is reduced. From the perspective of energy saving, emission reduction and circular economy, the active coke needs to be regenerated and recycled. Therefore, it is necessary t...

AI Technical Summary

Problems solved by technology

Among them, the most widely used reactor is the rotary kiln, which is relatively advanced in structural design and process arrangement, especially in large-particle activated coke or activated carbon, but the industrial design of the rotary kiln is 3-5%. The filling rate is relatively low, and the heat exchange effect inside the reactor is not ideal, and the sealing of the kiln head and kiln tail is also a technical difficulty

[0003] In terms of moving bed activated coke desulfurization in steel mills, the regeneration of regular granular activated coke is widely used in view of the low filling rate of the rotary kiln, and the moving bed with built-in heat exchange is widely used. Heat, the heat transfer effect of active coke is not ideal. On the one hand, the low thermal conductivity of regular active coke and the low heat transfer coefficient caused by low motion speed lead to uneven heat in the active coke layer

Therefore moving bed is not an ideal reactor form in terms of thermal efficiency

[0004] At the same time, more active carbon is now widely used in the form of regular particles, especially in moving bed desulfurization. Therefore, the existing reactor form is not suitable for irregular small particle crushed activated carbon, mainly because the bulk density of small particles is much smaller than that of regular particles. The thermal conductivity is much smaller, and it is difficult to achieve a good heat transfer effect

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