Fast pyrolysis furnace and pyrolysis method

Abstract

The invention relates to a fast pyrolysis furnace and a pyrolysis method. The pyrolysis furnace comprises a pyrolysis chamber and a combustion chamber forming a hollow cavity. The combustion chamber is isolated from the pyrolysis chamber through a pyrolysis chamber wall and arranged around the circumference of the pyrolysis chamber. The combustion chamber comprises multiple vertically-arranged vertical flame paths. The bottoms of the vertical flame paths are provided with gas first-section supply openings, and the middles of the vertical flame paths are provided with gas second-section supply openings. The method includes the steps that air is fed into the vertical flame paths of the combustion chamber; gas is supplied into the vertical flame paths of the combustion chamber through the gas first-section supply openings and the gas second-section supply openings, the air and the gas are combusted, and coal is fed into the pyrolysis chamber of the fast pyrolysis furnace; the coal is subjected to fast pyrolysis under heating of the annular combustion chamber. According to the fast pyrolysis furnace and the pyrolysis method, the high heating uniformity of the fast pyrolysis furnace can be effectively improved, the combustion temperature and combustion strength of the bottom and the top of the combustion chamber can be reduced, the high temperature point temperature can be reduced, therefore, generation of NOx is reduced, and environmental friendliness is better promoted.

Description

technical field [0001] The present invention generally relates to the field of pyrolysis, in particular to a rapid pyrolysis furnace and a pyrolysis method. Background technique [0002] Rapid pyrolysis can make carbon-containing polymers undergo rapid bond cleavage reaction, inhibit the secondary pyrolysis reaction and cross-linking reaction of pyrolysis products, reduce gas and semi-coke products in the pyrolysis process, and improve tar yield. From the perspective of economic and social benefits, rapid pyrolysis technology is a very suitable technology for the treatment of carbonaceous materials. [0003] Rapid pyrolysis reactors are generally developed as fluidized bed, moving bed, rotating bed and other reactors, and use gas or solid heat carrier to meet the requirements of temperature field and heating rate, but rapid pyrolysis reactor using heat carrier involves heat. The uniform distribution, mixing and reaction of the carrier and the raw materials, as well as a ser...

AI Technical Summary

Problems solved by technology

Compared with gas furnaces and traditional electric furnaces, the thermal efficiency of the existing open pyrolysis furnaces has been improved, but the thermal efficiency is still low, and the heating is only a few degrees to tens of degrees per second, and the energy provided for pyrolysis is unstable and unstable. It is clean and contains impurities. At the same time, the pyrolysis furnace is heated unevenly in the high direction, which not only affects the efficiency of the pyrolysis furnace but also affects the yield of pyrolysis products.

Images