A kind of pyrolysis furnace and its application

Abstract

The invention discloses a novel pyrolyzing furnace and application, and belongs to the technical field of application of low temperature pyrolysis in low-rank coal. Fire path and furnace body split design is adopted in the novel pyrolyzing furnace; a fire path comprises a closed pipeline with two open ends. A fire nozzle with a gas inlet is arranged on the front portion of the closed pipeline, and an exhaust gas outlet is formed in the tail end of the closed pipeline. The exhaust gas outlet is communicated with a furnace body so that exhaust gas generated through combustion can be introduced into the furnace body of the pyrolyzing furnace. According to the novel pyrolyzing furnace, it is guaranteed that the temperature of the exhaust gas entering a combustion chamber of the pyrolyzing furnace is lower than the heat resisting temperature of a furnace body manufacturing material, therefore, the stability of the furnace body is not influenced, use of an expensive high temperature resisting material can be avoided, and cost is reduced. In addition, the high-temperature exhaust gas is subjected to full temperature regulating and mixing before entering the furnace body, therefore, a local instantaneous high-temperature area cannot be generated, and pyrolyzing is more uniform.

Description

technical field [0001] The invention relates to the technical field of medium-low temperature pyrolysis application of low-rank coal, in particular to a pyrolysis furnace and its application. Background technique [0002] As a fossil energy resource, coal is clean, efficient, and comprehensively transformed and utilized, which is the future development direction. Polygeneration or cascade utilization based on coal pyrolysis conforms to the principles of cleanliness, high efficiency, and comprehensive conversion and utilization, and has attracted the attention of researchers and developers. Coal pyrolysis, as its main process unit, has received more attention. [0003] At present, the pyrolysis furnaces used for coal pyrolysis are mainly divided into two types: internal heating type and external heating type, and both the internal heating type and the external heating type use the combustion chamber as the fire path, that is, the fire path and the furnace body are Integrated...

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Problems solved by technology

Chinese patent document CN 105295961 A discloses a pyrolysis furnace and a combustion chamber. In the prior art, both sides of the combustion chamber are carbonization chambers. There is a heat-conducting partition wall between the carbonization chamber and the combustion chamber. The cross-section of the combustion chamber is fan-shaped. The combustion chamber is provided with a number of radially spaced first partitions and a wedge-shaped wall, so as to divide the combustion chamber into several chambers and increase the overall stability of the combustion chamber; nozzles are provided at the bottom of each chamber , the nozzle is connected with the furnace gas and the combustion gas, although the existing technology has higher heating uniformity and easier control of each cavity than the combustion chamber with a larger space, which can improve the uniformity of heat transfer to the carbonization chamber. The coal seam in the carbonization chamber is heated more evenly. However, compared with other prior art, although this prior art improves the uniformity of coal seam heating in the furnace body, the combustion chamber is also used in this prior art. It is used as a fire path, that is, the design of the fire path and the furnace body is integrated, so when the fuel gas burns in the combustion chamber of the furnace body, an instantaneous high temperature zone of about 1800 ° C will be generated in the furnace, and the general refractory material cannot meet such a high temperature. Therefore, some expensive high-temperature-resistant materials have to be used, which increases the cost of the furnace body; in addition, due to the uneven temperature in the furnace, the pyrolysis material in the carbonization chamber cannot be uniformly pyrolyzed , reducing the quality of the product

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