Direct heating pyrolysis conversion equipment and low-rank coal pyrolysis process

Abstract

The present invention discloses direct heating type pyrolysis conversion equipment, which comprises a three-stage swing rotary furnace, wherein the three-stage swing rotary furnace comprises a drum, a drive device, a supporting device, a swing control device and two sectioning assemblies, the swing control device, the drive device and the supporting device are respectively used for controlling, driving and supporting the drum to perform reciprocating swing along rotation axis, the drum is separated into a first working condition section, a second working condition section and a third working condition section by the two sectioning assemblies, the first working condition section, the second working condition section and the third working condition section are mutually independent, the sectioning assemblies communicate the adjacent working condition sections and only allow a solid phase material to pass through, a drying section is arranged in the first working condition section and is provided with a drying gas inlet and a drying gas outlet, a dry distillation section is arranged in the second working condition section and is provided with a first flue gas heating jacket, the second working condition section is provided with a drying distillation gas outlet, and a gas cooling section is arranged in the third working condition section. With the direct heating type pyrolysis conversion equipment of the present invention, the drying, the dry distillation and the cooling of low-rank coal, garbage, biomass and the like can be integrally completed so as to simplify the equipment. The invention further discloses a low-rank coal pyrolysis conversion process.

Description

technical field [0001] The invention relates to the technical fields of energy, environmental protection and chemical equipment, in particular to a direct heating type pyrolysis conversion equipment. The invention also relates to a low-rank coal pyrolysis process. Background technique [0002] my country is the largest coal user country. In my country's coal resources, low-rank coal reserves are relatively large. Low-rank coal refers to coal with a low degree of coalification, such as lignite, long-flame coal, non-caking coal, weakly caking coal and Gas coal and other coal types. Low-rank coal has no caking or small caking, and is generally not suitable for coking. However, low-rank coal has a large volatile content, and can produce tar and gas through medium and low temperature dry distillation pyrolysis, and produce semi-coke at the same time. [0003] Low-rank coal usually adopts low-temperature dry distillation upgrading process, that is, the process of processing low-r...

AI Technical Summary

Problems solved by technology

Because the drum of the existing rotary furnace rotates continuously in a single direction, it is impossible to install other devices for process reaction on the outer peripheral wall of the drum, because other devices need to be connected with external equipment through wires or pipes, and can only be installed on the furnace head and furnace. The internal process of the drum cannot be effectively completed, and the outer wall of the drum cannot be connected with the external pipeline. The fluid material cannot directly enter and exit from the outer wall of the drum, but can only enter and exit at the furnace head and furnace tail, which is not conducive to the control of materials in the middle position of the rotary kiln.

In addition, due to the continuous rotation of the drum, and the large sealing surface between the two ends of the drum and the furnace head and the furnace tail, the sealing between the drum and the furnace head and the furnace tail is difficult, and the air leakage rate is high, especially when the temperature is higher. Converter, due to the thermal expansion and contraction of the furnace body and the limitation of high-temperature dynamic sealing materials, the sealing effect is very poor, which has a great impact on the production process

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