Drying furnace or pyrolyzing furnace with rotary beds

Abstract

The invention discloses a drying furnace or pyrolyzing furnace with rotary beds. The drying furnace or the pyrolyzing furnace comprises a closed shell, N concentric ring planar rotary beds, a feed port, N stop plates, N discharge ports and at least one pyrolysis gas product outlet and / or one tail gas outlet, wherein the N concentric ring planar rotary beds are positioned in the shell; the two ends of the stop plates are seamlessly connected with the inner walls and the outer walls of the corresponding rotary beds respectively; each rotary bed comprises a rotatable planar bed bottom and an inner wall and an outer wall which are kept still relative to the bed bottom; the bed bottom of each rotary bed is provided with at least one through hole; and the heights of the N rotary beds rise gradually from inside to outside and seamless connection is realized. When a material is rotated to the position of a stop plate along with the bed bottom of a rotary bed, the material is pushed from outside to inside by the stop plate so as to fall into the next joined rotary bed through a discharge port; and thus, the material falls from outside to inside step by step, is conveyed to the position of the discharge port of the innermost rotary bed through the bed bottoms of the N rotary beds and is finally discharged out of the drying furnace or the pyrolyzing furnace through the discharge port.

Description

technical field [0001] The invention relates to a drying furnace or a pyrolysis furnace with a rotating material bed, in particular to a drying furnace or a pyrolysis furnace with a rotating material bed for solid carbonaceous materials. Background technique [0002] In the context of the increasing shortage of global oil and gas resources, how to rationally utilize coal resources in a low-cost and environmentally friendly manner to realize coal's supplementation and even substitution of oil and gas resources has become an important research topic in the energy industry. [0003] After many years of research and a large number of experiments, it can be determined that the rational utilization of coal resources is to refine and comprehensively utilize coal according to the different characteristics of coal quality and coal types. Drying and pyrolysis technology is one of the basic ways for coal graded refining and comprehensive utilization. Generally, the pyrolysis of solid ...

AI Technical Summary

Problems solved by technology

Since the movement of the material on the material bed is only pushed and guided by the guide rake 28, and there is no physical barrier between different material rows, the controllability of the material movement is relatively weak

During the rotation process, the materials located in different rows are prone to back-mixing and cascading, etc., which makes the thickness and residence time of the materials on the rotating material bed different, and the uniformity of heat transfer and the degree of uniformity of pyrolysis also deteriorate.

When the above-mentioned rotary hearth furnace is enlarged to an industrial application scale, the situation of back-mixing and cascading of materials between different columns is more serious, so that the quality, stability, and economical efficiency of coal pyrolysis are adversely affected

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