Fuel composition

FIELD: chemistry.

SUBSTANCE: invention relates to a fuel composition, which consists of sodium caboxylate and a carbon-containing compound, where as the carbon-containing compound applied is carbon powder, with the following component ratio, wt %: sodium carboxylate 40-50; carbon powder - the remaining part.

EFFECT: increase of the fuel composition stability, reduction of sulphur and ashes content, extension of the boiler fuel assortment.

1 tbl, 6 ex

 

The invention relates to heating oil on the basis of carbon-containing compounds, as well as waste vegetable oils and allows to expand the range of boiler fuels.

The closest in technical essence is a boiler fuel (RF patent No. 2500792, C10L 1/04, 2013), containing a heavy oil fraction and a stabilizer, which is used as waste production of vegetable oils - carboxylate sodium in the following ratio of components, wt.%:

the sodium carboxylate20-30
heavy petroleum fractionelse

The disadvantages of this fuel is its low stability and high sulfur content.

The task of the invention is a fuel composition of high quality, which increases the range of boiler fuels.

The technical result is a fuel composition having a high stability, low sulphur and ash content and increasing the range of boiler fuels.

The technical result is achieved in that the fuel composition contains sodium carboxylate and carbon-containing compound is pulverized coal in the following ratio component�s, % mass.:

The sodium carboxylate40-50
Coal dustelse

One of the components of the proposed fuel composition is a sodium carboxylate, which is a sodium salt of fatty acids obtained by alkaline processing waste generated in the processing of vegetable oils with caustic soda. This pasty substance is light brown or brown, containing not less than 25% fat, 9-28% of Soaps and 0.2-0.4% of free alkali.

Content in the fuel composition of sodium carboxylate provides a stable fuel emulsion, improves its stability while maintaining high technical indicators such as calorific value and sulphur content and ash content in the fuel.

The second component of the proposed fuel composition is pulverized coal, which is a waste of the next stages of coal mining: drilling of holes, blasting, crushing of coal combines, loading and transportation of coal. Pulverized coal provides the high heat of combustion, sustained stability and low sulphur content.

In addition, the proposed composition allows to recycle waste vegetable oil manufacturing and coal mining, as well as �assurity range of boiler fuels.

Thus, the set of essential features set forth in the claims, allows to achieve the desired technical result, namely to increase the stability of the fuel composition to reduce the content of sulfur and ash, and also to expand the range of boiler fuels.

A fuel composition is prepared by heating the sodium carboxylate to 60-70°C, add coal dust with constant stirring. Then the resulting mixture was continued to stir at this temperature until a stable emulsion for 30-40 minutes.

The quality of the fuel composition is illustrated by the following examples. As components used: sodium carboxylate production of "Krasnodarskogo" and coal dust LLC "Mineral trade", Rostov-on-don. Coal dust has the following characteristics: bulk density - 685 kg/m3the humidity is 3.2%, the fineness of 50 to 90 μm, the ash content is 1.8%. A fuel composition was prepared in the pilot plant of the OJSC "Rosneft", equipped with a high-speed stirrer (3000 rpm), storage tanks, pumps and pipelines. The resulting fuel composition was determined viscosity WU80GOST 6258, heat of combustion according to GOST 21261, mass fraction of sulphur GOST P51947, the ash content of Annex 1 to GOST 10585, as well as stability on its peelability.

Example # 1

45 % of the mass. the sodium carboxylate was heated to 65°C in the tank, equipped with a high-speed stirrer, was added 55 % of the mass. coal dust with constant stirring. Then the stirring was continued at this temperature for 35 minutes. The resulting fuel composition were analyzed. The results are presented in the table.

Example No. 2

40 % of the mass. the sodium carboxylate was heated to 60°C in the tank, equipped with a high-speed stirrer, was added 60% wt. coal dust with constant stirring. Then the stirring was continued at this temperature for 40 minutes. The resulting fuel composition were analyzed. The results are presented in the table.

Example # 3

50 % of the mass. the sodium carboxylate was heated to 70°C in the tank, equipped with a high-speed stirrer, and add 50 % of the mass. coal dust with constant stirring. Then the stirring was continued at this temperature for 30 minutes. The resulting fuel composition were analyzed. The results are presented in the table.

The sample No. 4 (comparative)

35 % of the mass. the sodium carboxylate was heated to 65°C in the tank, equipped with a high-speed stirrer, and add 65 % of the mass. coal dust with constant stirring. Then the stirring was continued at this temperature for 35 minutes. The resulting fuel composition of analysera�Ali. The results are presented in the table.

Sample No. 5 (comparative)

55 % of the mass. the sodium carboxylate was heated to 65°C in the tank, equipped with a high-speed stirrer, and added 45 % of the mass. coal dust with constant stirring. Then the stirring was continued at this temperature for 35 minutes. The resulting fuel composition were analyzed. The results are presented in the table.

Example No. 6 (prototype)

25 % of the mass. the sodium carboxylate was heated to 65°C and was mixed with 75 wt%. mazut M-100, pre-heated to 65°C, the tank is equipped with a high-speed stirrer, and stirred at this temperature for 35 minutes. Received boiler fuel were analyzed. The results are presented in the table.

For comparison, the table shows the indicators of quality traditional boiler fuel - mazut M-100.

The presented results demonstrate the high quality of the proposed fuel composition. It has a high stability, low sulphur and ash content. Lower sulfur content in the fuel in comparison with the prototype and mazut M-100 reduces the corrosive effect of the fuel on the equipment. Low ash content of the fuel composition due to the fact that the fineness of the coal dust provides removal of ashes from the flue gases. Although lower heats� value is lower than the prototype, and the viscosity of the above, these figures are better than traditional fuel - mazut M-100. In addition, it should be noted that the low temperature in the cooking process save energy, and the proposed composition of the fuel composition expands the range of boiler fuels.

td align="center"> not specified
Table
The properties and quality of the fuel composition
Example No.The content of components in the fuel composition, % wt.Quality indicators
the sodium carboxylatecoal dustthe lower heat of combustion, kJ/kgviscosity, WO80stability daymass fraction of sulfur, %ash content, % mass
14555399404,875170,820,06
2 4060399525,105250,810,06
3505039947of 4.955300,800,06
4 Wed3565399805,865050,810,06
5 MS5545396704,925300,800,06
6 PR2575 fuel oil M-100408954,004401,50,10
Mazut M-1003990016not more than 2,0not more than 0,14

A fuel composition consisting of a carboxylate, sodium and carbon-containing compounds, characterized in that in the composition of the carbonaceous compounds is coal dust in the following ratio of components, wt.%:

The sodium carboxylate40-50
Coal dustElse



 

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