A pyrolysis furnace for treating waste tires and its treatment process

Abstract

The invention provides a technical scheme of a pyrolysis furnace and a treatment process for treating waste tires. According to the technical scheme, the upper and lower parts of a furnace body take the shapes of columns of trapezoidal cones; a feeding hole is formed in the top side of the furnace body; a discharge hole is formed in the bottom side of the furnace body; an annular exhaust surrounding tube is arranged on the outer side of the upper conical part of the furnace body; a main exhaust tube is connected to the outer side wall of the exhaust surrounding tube; a plurality of branch exhaust tubes are connected to the inner side wall of the exhaust surrounding tube and are communicated with an inner cavity of the furnace body; an annular inlet surrounding tube is arranged on the outer side of the lower conical part of the furnace body; a main inlet tube is connected to the outer side wall of the inlet surrounding tube; a plurality of branch inlet tubes are connected to the inner side wall of the inlet surrounding tube and are communicated with the inner cavity of the furnace body; the furnace body is internally provided with an inner heating tube with an inner thermal gas inlet tube and an inner thermal gas exhaust tube. The treatment process of the scheme comprises the following steps: performing pyrolysis on waste tire fragments by using the pyrolysis furnace, obtaining crushed steel wires and finished carbon black product from pyrolysis slag after pyrolysis, obtaining heavy oil and a finished slag oil product from a pyrolysis gas by using a cyclone separator and a spraying tower, further obtaining a finished light oil product by using a pipe bundle condenser, heating the rest pyrolysis gas by using a combustion furnace, and subsequently feeding back to the pyrolysis furnace to provide high-temperature fume.

Description

technical field [0001] The invention relates to equipment and technology for treating and utilizing waste containing high-molecular organic matter, in particular to a pyrolysis furnace for treating waste tires and a processing technology. Background technique [0002] In the prior art, the waste tire pyrolysis process can be divided into direct heating technology and indirect heating technology. The direct heating technology, as described in patent application numbers 200680054973.7, 200980140238.1 and 200980137677.7, uses the flue gas after pyrolysis charcoal combustion to heat the inert circulation carrier gas first, and then directly contacts the high-temperature inert circulation carrier gas with waste tires for pyrolysis. This will consume a large amount of pyrolytic carbon products, and in the cooling process of mineral oil vapor, accompanied by the cooling of a large amount of circulating carrier gas, the thermal efficiency of the system will be reduced, and the heati...

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Problems solved by technology

This will consume a large amount of pyrolytic carbon products, and in the cooling process of mineral oil vapor, accompanied by the cooling of a large amount of circulating carrier gas, the thermal efficiency of the system will be reduced, and the heating surface and investment of cooling equipment will be increased.

This avoids the above-mentioned problems in indirect heating technology. Indirect heating technology generally adopts horizontal rotary equipment for production, as described in patents such as application numbers 201010223429.9 and 200610053685.1. There are problems such as easy leakage of harmful gases in the gaps between components, and some indirect heating processes cannot even run continuously, which is the deficiency of the existing technology

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