Method of recycling solid residue from automobile tyre pyrolysis

FIELD: chemistry.

SUBSTANCE: invention relates to method of recycling solid residue of tyre pyrolysis, which includes enrichment of solid fuel by method of oil agglomeration. As solid fuel used is solid carbon residue of tyre pyrolysis with initial ash content 11.40-11.66%, sulphur content 1.2 wt %, preliminarily crushed to particle coarseness 0.1 mm, with liquid fraction of pyrolysis being used as reagent for enrichment in amount 4.0-6.0% to weight of water, used for enrichment, after which granulation of obtained concentrate and application of water-resistant smell-absorbing coating from petroleum products on the surface of granules.

EFFECT: obtaining moulded fuel from solid residue of automobile tyre pyrolysis with low ash content and sulphur content.

4 tbl, 3 ex

 

The invention relates to a technology for forming combustibles, such as coal slurries, small classes of coal, coke dust, solid residue of pyrolysis of tires, etc. Obtained molded fuel can be used as fuel for combustion in domestic and industrial furnaces.

The volume of formation and accumulation of waste tires in the world reach enormous sizes. One of the most environmentally friendly ways of processing of worn tires is pyrolysis, which produces semi-products: gas, liquid fuel fraction of the carbonaceous residue and metal cord. The resulting solid carbonaceous residue - low-carbon, almost can not find their applications directly and stored at the production site of the enterprise. The output of this residue after pyrolysis is 80-85% of the original weight of the tires. The solid residue is often unacceptable for direct use ash (Vdaf=12-15 wt. %) due to additives in rubber, can be highly toxic due to violations of the technological mode. The problem of disposal of the solid residue of pyrolysis of the tires is very important.

The invention contributes to the solution of environmental problems associated with the formation and disposal of waste (solid residue of pyrolysis of tires).

Outstanding ways� agglomeration of sludge and small classes of coal, comprising mixing the coal slurry with the binder, which is sodium HUMATE, compressing the mixture into briquettes with moisture content of the mixture to 25%, followed by drying and curing of briquettes (Lury V., Mikheev O. V., Nikishichev B. G. a New method for the agglomeration of sludge and small classes of coal. IAC mining Sciences. Moscow: 1993).

However, this method is not effective enough and is characterized by relatively low strength and low moisture briquettes, high capital, energy, material and labor costs and ensures environmental safety and health level of hygiene.

Known methods of briquetting of bituminous coal and anthracite, including dehydration and drying of raw coal to a moisture content of 2-3%, mixing it with a liquid or solid binder (bitumen, coal tar pitch, sulfate-alcohol bard, solid clay, cement), compressing the mixture pressure of 20-50 MPa and subsequent cooling (see Elishewitz A. T. Technology of briquetting of mineral resources. - M.: Nedra, 1989, p. 86, 92, 98, 101, 106).

The mentioned methods have the following disadvantages.

First, the need to use binders offer greatly complicates and increases the process of briquetting of coals, as provides for operation deep obasogie�Oia and thermal drying of raw coal to a minimum humidity, i.e. up to 2-3%.

Secondly, the existing technology of briquetting of bituminous coal and anthracite are not intended for use as a raw material of the solid residue of pyrolysis of tires (size 0-10. 0 mm) and fine coal slurries (class size 0-1. 0 mm) resulting from the extraction and processing of coal.

The closest to the proposed invention the technical essence is a method of producing fuel briquettes, comprising mixing coke dust, pre-enriched by oil agglomeration method to the ash content of 5.0-5.5 wt. % and the sulfur content of 0.05 wt. %, with a binder, which is used as the urea in the amount of 4.0 to 6.0% by weight of the original concentrate, further briquetting the mixture (Patent RF №2468071, IPC 10L 5/04 10L 5/12, publ. 27.11.2012.).

The disadvantage of this method consists in using a high pressure briquetting.

Offers cuscowilla solid carbon residue which is a waste of pyrolysis of waste tires.

The technical result of the claimed invention to provide a molded fuel with low ash and sulfur content, prepared from concentrate solid carbon residue of pyrolysis of tires that will make it better to recycle waste tires and to improve the environmental situation in the regions./p>

The technical result is achieved in that in the method of processing of the solid residue of pyrolysis of tires, including enrichment of solid fuel by the oil agglomeration method according to the invention as solid fuel use solid carbon residue of pyrolysis of tires with the original ash content 11,40-11,66%, a sulfur content of 1.2 wt. %, pre-ground to a particle size of 0.1 mm, as a reagent for enrichment - liquid fraction of pyrolysis in the amount of 4.0 to 6.0% by weight of water used for enrichment, this is followed by granulation of the obtained concentrate, coating the surface of granules of water-resistant, odor absorbing coating of oil products.

The claimed method is as follows.

The solid residue of pyrolysis of tires with the original ash content 11,40-11,66%, a sulfur content of 1.2 wt. % pulverized to a particle size of 0.1 mm, enriched with a plant oil agglomeration method to obtain glubokouvaghaemui concentrates.

The solid residue of pyrolysis of tires fine, finer than 1 mm. By the number of ash content solid carbon residue of pyrolysis of tires refers to ash waste that prevents you from using it.

As a solid residue of pyrolysis of tyres are fine (<1 mm), the optimal method of its enrichment - oil agglomeration. OS�IOD advantages of oil agglomeration method include high selectivity in the separation of particles less than 100 microns (which is typical for coke dust), a wide range of ash content enrich of coal, the ability to process at pulp density of 600 g/l, additional dewatering of the concentrate by displacement of water by oil in the formation uglemaslyanye granules.

In the capacity of technical or pour drinking water and comminuted solid residue of pyrolysis of tires. To visual mixing for 1-2 minutes, do intensive mixing of the solid residue of pyrolysis of tires and water using a paddle stirrer connected to a motor. Mixing more than 3 minutes is impractical. To avoid the "funnel" that reduces the intensity of mixing, in a container set special preradical. Then add the liquid fraction of the pyrolysis of tires in the amount of 4.0 to 6.0% by weight of water used for enrichment and stirred for 5-8 minutes Stirring not less than 5 minutes leads to the formation of oil agglomerates, as the hydrocarbon reactant't have time to fully moisten the surface of dust particles. Increase mixing time of over 8 minutes is impractical because it increases the demand.

As a result of turbulence in the slurry (mixture of water, solid residue of pyrolysis of tires and reagent) is selective formation of oil aggregates that are compacted, structurally transformed into durable pellets are spheres�tration forms, when fuel gets rid of the ballast - mineral impurities. The ash content of the obtained concentrates not exceed 4.5 to 5.5 wt. %, sulfur content is 0.2 wt. %, indicating the acceptability of the obtained concentrates for use in power generation; high yield (up to 84 wt. %) and lower ash content and sulfur content of concentrates due to the completeness of separation of the organic and mineral parts of the solid residue of pyrolysis of tires in the enrichment process oil agglomeration.

Output at the plant to get the concentrate with the following characteristics (table 1).

The resulting concentrate is granulated, the granules size is 1.5-2 cm, is applied to the surface of the pellets are water resistant, odor absorbing coating of oil products (e.g. paraffin).

Get molded fuel with the following characteristics (table 2).

An example of a specific application of the method.

The solid residue of pyrolysis of the tires is enriched in a pilot plant by the oil agglomeration method to obtain glubokouvaghaemui concentrates.

In the capacity of technical or pour drinking water with a volume of 850 ml, download solid residue of pyrolysis of tires weighing 200 g for 1-2 min spend an intensive mixing of the solid residue PI�of Alisa tires and water using a paddle stirrer, connected to the engine. To avoid the "funnel" that reduces the intensity of mixing, in a container set special preradical. Then add the hydrocarbon reactant (liquid fraction of the pyrolysis of tires) in the amount of 42.5 ml and stirred for 5-8 min.

Output at the plant to get the concentrate with the following characteristics (table 3).

The resulting concentrate is granulated, the dimensions of the resulting pellets are 1.5-2 cm

Get molded fuel suitable for direct combustion, the technical characteristics of which are presented in table 4.

Example 2. The solid residue of pyrolysis of the tires is enriched in a pilot plant by the oil agglomeration method to obtain glubokouvaghaemui concentrates.

In the capacity of technical or pour drinking water 1000 ml, download solid residue of pyrolysis of tires weighing 200 g for 1-2 min spend an intensive mixing of the solid residue of pyrolysis of tires and water using a paddle stirrer connected to a motor. To avoid the "funnel" that reduces the intensity of mixing, in a container set special preradical. Then add the hydrocarbon reactant (liquid fraction of the pyrolysis of tires) to�icesto 42,5 ml and stirred for 5-8 min.

At the plant outlet is not a concentrate, as the humidity increases and the viscosity of the initial mass taken for enrichment, not allow it to get.

Example 3. The solid residue of pyrolysis of the tires is enriched in a pilot plant by the oil agglomeration method to obtain glubokouvaghaemui concentrates.

In the capacity of technical or pour drinking water with a volume of 850 ml, download solid residue of pyrolysis of tires weighing 200 g for 1-2 min spend an intensive mixing of the coke dust and water using a paddle stirrer connected to a motor. To avoid the "funnel" that reduces the intensity of mixing, in a container set special preradical. Then add the hydrocarbon reactant (liquid fraction of the pyrolysis of tires) in the amount of 8.5 ml and stirred for 5-8 min.

At the plant outlet is not a concentrate, the amount of hydrocarbon reactant (liquid fraction of the pyrolysis of tires) is not sufficient to produce concentrate.

The method of processing of the solid residue of pyrolysis of tires allows you to get waste from high-quality products - molded fuel. Recycling of the solid residue of pyrolysis of tires will improve the environmental situation, to expand the resource base for energy through the use of alternative species� fuels.

Method for processing solid residue of pyrolysis of tires, including enrichment of solid fuel by the oil agglomeration method, characterized in that as solid fuel use solid carbon residue of pyrolysis of tires with the original ash content 11,40-11,66%, a sulfur content of 1.2 wt.%, pre-ground to a particle size of 0.1 mm, as a reagent for enrichment - liquid fraction of pyrolysis in the amount of 4.0 to 6.0% by weight of water used for enrichment, this is followed by granulation of the obtained concentrate, coating the surface of granules of water-resistant, odor absorbing coating of oil products.



 

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