Composition for obtaining fuel briquette

FIELD: chemistry.

SUBSTANCE: invention relates to composition for obtaining fuel briquette, which contains thermally processed coal fines and residues of petroleum processing as binding substance, it contains thermally processed coal fines to humidity not higher than 4-5%, thermally processed to humidity not higher than 4-5% sulfate hydrolytic lignin, neutralised with solution in ratio S:L as 1:5 of slaked lime in amount 1.34 kg per a ton of sulfate hydrolytic lignin and is subjected to mechanical activation, with the following component ratio, wt %: thermally processed coal fine - 74-75%, sulfate hydrolytic lignin - 11-15%, residues of petroleum processing - 15-10%.

EFFECT: increase of ecological safety due to reduction of fraction of emissions of sulfurous compounds in combustion of fuel briquettes.

2 tbl, 2 ex

 

The invention relates to a processing plant waste coal industry, in particular, compositions for producing briquettes consisting of solid fuels, biofuel materials and a binder of oil origin, and can be used as fuel in the energy industry and everyday life.

Known carbonaceous briquette and method thereof using a hydrocarbon binder. The briquette filler is heat-treated mixture of waste fruits, coal or coke breeze [1].

The disadvantage of this structure is the lack of resistance of the briquettes due to the use of starch as a binder.

Known fuel briquette and method thereof, which includes a mixture of coal dust and a binder containing a peck of VAT residue of the distillation of tall oil of at least 0.5% by weight of coal and derived sulfonic acids not less than 0.5% by weight of coal. The molded mixture is subjected to heat treatment at a temperature of 200-800°C for at least 4 min [2].

The disadvantage of this structure is the relative scarcity of the applied binder.

The known method for producing briquettes from lignite using as a binder waste polyethylene. Crushed to particle sizes IU the its 2.0 mm waste polyethylene type in briquetted mixture in an amount of 4,4÷5,0% on dry basis of the coal, heated to a temperature of 120÷140°C, produce isothermal exposure for 30 min and pressing briquettes at a pressure of 78 MPa [3].

The disadvantage of this method and composition is release into the atmosphere of toxic substances in the combustion process polyethylene, serve as binding fuel briquettes.

The closest is a method of briquetting coal raw material with the ratio of components: molten bitumen - 50% (wt.) with pre-dried and mechanically activated lignin - 50% (wt.), the mixture of the binder (10% wt.) mixed with 90% (wt.) lignite trivia [4].

The disadvantage of this structure are increased emissions of sulfur during combustion of the fuel briquette.

The technical result is to increase environmental safety due to the reduction of emissions of sulfur compounds by burning fuel briquettes.

The technical result is achieved in that the composition for the production of fuel briquettes, including heat coal and residues of oil as a binder, contains heat coal to a moisture content of not more than 4-5%, heat-treated to a moisture content of not more than 4-5% of sulfate lignin, which is neutralized with a solution in the ratio T:W 1:5 slaked lime in the amount of 1.34 kg per tonne sulfa the aqueous hydrolytic lignin and subjected to mechanical activation, in the following ratio, wt.%: heat-treated coal - 74-75%, sulphate lignin - 11-15%, balances oil - 15-10%.

Distinctive features of the proposed structure are the quantitative ratio of the components, as well as the neutralization of sulfate hydrolysis lignin solution of slaked lime. The original solution in the form of neutralization of sulfuric acid adsorbed by the porous structure of hydrolytic lignin sulfate, a solution of slaked lime allows to convert sulfur compounds in the form of salts, does not form volatile compounds during the combustion of the briquettes and non-aggressive action on the natural environment. The possibility of the formation of the desired sequence to perform actions to obtain the composition of the fuel briquette, and the composition can solve the task, determines the novelty, industrial applicability and inventive step of the development.

An example implementation of the method

Example 1. The composition contains a heat coal to a moisture content of not more than 4-5%, heat-treated to a moisture content of not more than 4-5% of sulfate lignin. Sulfate lignin neutralized solution in the ratio T:W 1:5 slaked lime in the amount of 1.34 kg per tonne of hydrolytic lignin sulfate. With lifety lignin after neutralization subjected to mechanical activation. The composition of the fuel briquette is characterized by the following ratio, wt.%: heat-treated coal for 75% of sulfate lignin - 15%, balances oil - 10%. The pressure was 175 MPa.

Example 2. The composition contains a heat coal to a moisture content of not more than 4-5%, heat-treated to a moisture content of not more than 4-5% of sulfate lignin. Sulfate lignin neutralized solution in the ratio T:W 1:5 slaked lime in the amount of 1.34 kg per tonne of hydrolytic lignin sulfate. Sulfate lignin after neutralization subjected to mechanical activation. The composition of the fuel briquette is characterized by the following ratio, wt.%: heat-treated coal - 74%, sulphate lignin - 11%, balances oil - 15%. The pressure was 170 MPa. In table.1 presents the results of tests on the strength of briquettes.

Table 1
№p/pMethodConsumption, % (mass.)Pressure, MPaThe strength of the briquettes in compression, M the and
coalthe remains of refiningsulfate lignin
1Prototype No. 2455345905550of 5.4
The proposed method
2Example 1751015175of 5.75
3Example 27415111707,41

Table 2 shows the emissions of pollutants during the combustion of the briquettes of the proposed structure for the boiler unit consumption of fuel briquettes 44 kg/h

tr>
Table 2
The name of the substanceEmissions, g/sReducing emissions, %
the placeholderthe proposed method
Nitrogen dioxide (Nitrogen (IV) oxide)7,80·10-3to 6.57·10-315,77
Nitrogen (II) oxide (Nitrogen oxide)1,20·10-31,07·10-310,83
Sulphur dioxide (sulphurous Anhydride)7,70·10-22,33·10-369,81

The data in the table. 2, illustrate the reduction of pollutant emissions during the combustion of fuel briquettes developed composition.

The composition for the production of fuel briquettes contributes to the improvement of environmental safety due to the reduction of emissions of sulfur compounds by burning fuel briquettes. The use of the proposed composition for the production of fuel briquettes contributes to protecting the environment as a result of involvement in recycling coal mining and coal processing industry. The invention also allows to solve the acute-standing problem of waste hydrolysis industry - sulfate Hydra is LESNOGO lignin, neutralizing its negative impact on the environment.

Sources of information

1. Pat. 02114902 Russian Federation, IPC C10L 5/44. Carbon-containing briquette and method of preparation thereof [Electronic resource]/Lurij V. G. No. 97107735/04. - Mode of access: http://patentscope.wipo.int.

2. Pat. 02078120 Russian Federation, IPC 6 C10L. Fuel briquette and method of fabrication thereof [Electronic resource]. No. 95102216/04. - Mode of access: http://patentscope.wipo.int.

3. Pat. 2373261 Russian Federation, IPC C10L 5/14. The method for producing briquettes from lignite [Electronic resource]. / O. Danilov, Mikheev C. A., Moskalenko, I. C., Leonov A. M. No. 2008109775/04, 13.03.2008. - Mode of access: http://www.fips.ru.

4. Pat. 2455345 Grew. Federation: IPC C10L 5/16. Method of briquetting coal raw materials [Electronic resource]/Alexandrova T. N., Rasskazova A. C.; applicant and patentee Institution of Russian Academy of Sciences Institute of mining the far Eastern branch of Russian Academy of Sciences (IGD-RAS). No. 2011106057/04; Appl. 17.02.2011; publ. 10.07.2012. - Mode of access: http://wwwl.fips.ru.

Composition for the production of fuel briquettes, including heat coal and residues of oil as a binder, characterized in that it contains heat coal to a moisture content of not more than 4-5%, heat-treated to a moisture content of not more than 4-5% of sulfate lignin, which is neutralized with a solution in the ratio T:W 1:5 slaked known is the number of 1.34 kg per tonne of hydrolytic lignin sulfate and subjected to mechanical activation, in the following ratio, wt.%: heat-treated coal - 74-75%, sulphate lignin - 11-15%, balances oil - 15-10%.



 

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