Method and device for vaporization-heat-mostly-recyclable drying, carbonization or pyrolysis

Abstract

The invention discloses a method and a device for vaporization-heat-mostly-recyclable drying, carbonization or pyrolysis. Charging cars enter heating passages, and each heating passage is provided with an indirect heat conduction or radiative heat transfer heating device, a low-temperature preheating section and a high-temperature heating section. An optimum effect of steam and tail gas cooling, condensing and drying, carbonization or pyrolysis can be achieved by setting of lengths of the low-temperature preheating sections and the high-temperature heating sections, controlling of travelling speeds of the charging cars and adjusting of the indirect heat conduction or radiative heat transfer heating devices. Materials subjected to drying or low temperature carbonization can be continuously or intermittently fed into one independent heating passage for reheating prior to carbonization and pyrolysis. Gaseous products of the independent heating passage are collected and separated, and steam generated by the indirect heat conduction or radiative heat transfer heating devices is recovered to any one of previous heating passages. The method and the device have the advantages that energy can be saved greatly, consumption can be reduced greatly, environmental friendliness and easiness in control are realized, equipment is simple and low in cost, and mass production is facilitated.

Description

technical field [0001] The invention relates to the field of drying high-moisture materials such as coal, in particular to the field of drying, dry distillation or pyrolysis of lignite and low-modified long-flame coal. Background technique [0002] Most of the existing drying technologies convert moisture into water vapor and evacuate it. The water vapor carries a large amount of heat of vaporization and is not recycled. Moreover, the existing dry distillation and pyrolysis processes are complicated, the equipment investment is large, the production cost is high, and the control degree of environmental pollution and energy saving and consumption reduction is poor. Contents of the invention [0003] Aiming at the problems existing in the prior art, the present invention provides a drying, dry distillation or pyrolysis method and device in which most of the heat of vaporization can be recycled. Most of the water evaporated from the materials dried by the method and device c...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing drying technologies are to convert moisture into water vapor and evacuate it. Water vapor carries a large amount of heat of vaporization and is not recycled.

Moreover, the existing dry distillation and pyrolysis processes are complicated, the equipment investment is large, the production cost is high, and the control degree of environmental pollution and energy saving and consumption reduction is poor

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