RU1814686C - Method of solid fuel reprocessing - Google Patents

Abstract

Usage: processing of coal deposits and waste. SUBSTANCE: method for processing solid fuel is carried out by treating solid fuel with a solution containing a natural methogenic consortium of bacteria under thermophilic conditions. The process is anaerobic. 3 tab.

Description

The invention relates to mining, and in particular to methods of processing coal deposits and coal wastes to produce gaseous fuels and dispersed coal product, and can be used in the extraction of coal deposits that are environmentally disadvantageous for conventional mining, in the disposal of waste dumps in the heaps of coal mines and concentration plants, as well as in the energy industry and agriculture.

The purpose of the invention is to increase the efficiency of the process by producing valuable methane fuel.

The method is carried out as follows.

The processed array, if necessary, is divided into sections. Using any of the known methods, an anti-filtration contour of the processing section is created. By blasting the camouflage charges, the processed material is loosened, the section is opened with boreholes, casing pipes are installed with perforation over the entire height of the working zone to better prepare solid fuel for processing and even distribution of the bacterium-containing medium in the processing zone. If necessary, the processed material is heated to 50 ° C, for example, with superheated steam supplied to the wells under pressure, which allows to more fully open cracks and increase the permeability and porosity of solid fuel. After the pressure in the processing zone is reduced, a medium is injected through the wells containing a natural methanogenic consortium of bacteria. If necessary, adjust the pH to 7.2-7.7. Wells are sealed, thereby creating anaerobic conditions for bacteria.

After a certain time of contact of the bacteria with the nutrient medium, as a result of their intensive work, a significant formation of biogas, consisting mainly of methane, and the transfer of solid fuel to a dispersed state are observed.

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The start of biogas evolution is judged by the source of solid fuel dispersed

readings of pressure gauges installed in front of a fluid suspension,

wellhead. Wells that depressurize — The experimental results present and divert biogas for disposal. 1, 2 and 3. As can be seen from the table. 1 in

The process is considered completed by 5; in thermophilic mode, the process proceeds

end of biogas recovery. To this, it is more intense than the mesophilic one: the recyclable solid fuel is observed in the nation with a higher biogas yield with

dispersed to a fluid suspension with a high methane content therein; I maximize the output to the surface through the well of the biogas yield at 10 days

using pumps. 10 (with mesophilic - for 40 days).

Solid fuel processing process Figure 2 shows the dependence of codermodeled under laboratory conditions of methane gas in biogas on pH. The experiments were carried out in an Erlen medium flask. Highest content

500 ml meyer. As a source of methane in biogas, it was observed at pH 7.2 that the raw material was taken from black coals, brown coals15 7.7.

and their sludge (characteristics of the initial analysis of the released biogas feed are presented in Table 3). gas chromatographic methods were performed

As a medium containing a nature chromatograph LHM-8, a column with a per-pore consortium of methanogenic bacteria, com, a gas carrier - argon, a detector - kata, we used fermented slurry 20 meter, temperature 40 ° С, for analysis

cattle (humidity took 1 ml of gas.

98.66%), breeding of the rumen of a large horned-In table. 3 presents the characteristics

livestock (humidity 67.7%), activated sludge, recyclable solid fuel, mixed with biological treatment plants; solid fuel - bacterium-containing

aerial tanks of the city of Krasnoyarsk (humidity25 environment (slurry of cattle

97.79%). Livestock) and solid processed product. how

Grinded to a particle size of 0.5 mm is visible from the table. 3, the solid product, 290 g of transformable raw materials were placed in a batch, enriched with humic acids and in a flask, 200 g of either cattle fermented with mobile forms of mineral and organ manure were added, 30 components of the cattle easily digestible for dilution of bovine scar plants, which allows the use of either activated sludge. The pH of the mixture and the obtained product in agriculture were regulated by the addition of 10% NaKCOa as a fertilizer. In addition, as a result of either 5% HCI. When creating anaerobic processing of solid fuel by injection / trapping for methanogenic bacteria, the flask is subjected to significant detoxification using a rubber stopper in which the processed material was inserted. Two glass tubes were inserted. The proposed method allows 10 mm in diameter . One tube went down to learn biogas, which is a mixture and was used for deaeration of coal of interest as an additional source of argon flow, the other remained in gas-40 tan - one of the energy-rich, easy-to-space and served as a gas outlet. The transported type of fuel and raw materials . At the ends of the glass tubes, rubber was put on. In the process of processing solid, toponyne vacuum tubes with clamps. Along with biogas, a product is obtained, a tube included in the working mixture enriched with humic acids and the oxygen suction is adjusted to - 0.4 atm, after 45 mobile forms of mineral and organic argon components were passed through the same tube, well assimilable for 30-60 seconds before pressure build-up.

flask +0.1 these. The clamps at this time were in the proposed method.

open. By creating anaerobic conditions, zazhi-bacterial environment for solid fuel

we closed. The flask was placed in a thermostat50, which allows partially removing organics from it at a given temperature (30 and 50 ± 2 ° C).

without stirring. with a one-time replacement of the Technological method proposed by loading raw materials and Eacterium-containing excludes aeration of the working medium, which means the medium, varying pH from 6.5 to 8.0 and temperature-simplifies the process, the tour mode ( 30 and 5d ± 2 ° C). Especially during the processing of coal plies through a certain span of growth.

When intense gas production begins, the proposed method eliminates the need. By the time gas evolution ends, the need to introduce additional nutrients into the working environment for the active life of bacteria.

For the introduction of the process according to the proposed scheme, there is no need to purchase or special cultivation of bacteria cultures, since the proposed method uses a natural consortium of bacteria.

The proposed method allows us to process not only economically unprofitable coal deposits by traditional methods, but also utilize coal waste at the heaps of coal mines and coal processing plants, as well as waste from livestock farms, ruminant cattle processing plants, and aeration tanks of industrial enterprises.

The dependence of the biogas output

0

Claims (2)

The claims A method of processing solid fuel, which involves opening a processing section by wells, injecting a bacterium-containing medium through the wells, keeping it in the fuel reservoir and delivering the processed products to the surface, which comprises using a methanogenic consortium of bacteria in the form of fermented slurry as a bacterium-containing medium and breeding cattle rumen, while the pH of the bacteria habitat is maintained in the range of 7.2-7.7. Table I on temperature and processing time Solid fuel Bacterium-containing medium Coal Fermented. Manure 30 (jiae. Large horned coal slurry Also Brown coal Coal Crushed dung 50 large horned slurry Coal sludge Also Brown coal Cattle manure 50 slurry Note. V - l per 1 kg of dry matter per day (solid fuel + fermented slurry) . with R environment processing burden, days Gas outlet gas volume, l / kg (U) day 0  Structure,; ; - | ----- j CK j other -1... thirty 7.2 thirty 7.2 thirty 7.2 0 7.2 0 7.2 -f 7.2 10 twenty thirty 1) 0 fifty 10 twenty thirty 4o fifty 10 . twenty thirty 4o SO 10 20 30 bw 50 10 twenty thirty 40 50 10 20 30 CO SO 0.6 0.8 2.0 3.5 3.2 0.5 - 0.8 1.85 3.8 3.5 0.5 0.82 1.9 3,7 3.2 6.2 6.0 4, 8 4.2 3.4 5.7 5.2 4.8 4.0 3.0 5.7 5,0 45 42 2,8  twenty 26 32 40 40 . eighteen 27 35 . 35.5 35.5 22 8 32 52 36,4 55 80 80 73 60 .65 70 70 52 38.6 53.5 71 63 60 57 60 72 68 60 60 82 73 65 64.5 64.5 78 82 68 48 63.6 45 twenty twenty 27 40 35 thirty thirty 48 61,4 46.5 29th 37 ku 43 Dependence of methane content in biogas on temperature and pll medium Table 2 eleven 181468612 Table Z. Characterization of solid processing product 5, 6 82.3 1.36 8.3 0 .5.2 78.5 1.84 1.2.1 0 0.3 4.0 76.6 2.49 16.0 23.0 0.22 5.2 74.8 1.67 2.0 21.8 0.12 Solid fuel Solid fuel of a bacterium-containing medium (n.zh.k.s. n-mo, - p «(v. kg Hrf, Tce, TP To5 nd, Tk mg / kg | "R / 100rj mg / SO2% I JS I g / kg 1ng / 100g1 HI ng 15, 63 52.6 15.65 53.0 15.08 53.4 16.1 53.1 Note. 1, N.Zh.k.r.s - slurry of cattle 2. The definition of mobile forms B, P and K were according to Chirikov 0.03 0.36.8 83.0 2.8 8.313.2 0.03 0.47.02 79.1 3.1 12.212.8 0.45.8 77.3 ", 02 16.133.8 0.26.0 75.2 3.1 24.2 31.2 | .-. "-.--" -. ".-------" - ---- ---- -.-.--. J . Continuation of Table 3 Agrochemical analysis Solid processing product to Hi 40 ng / 1 OOg 75.0 0.75- "732.88, A48.2 73.6 0.81-3933.28.6 48.8 68.2 1.67-5731.69.0952.1 63.8 0.98-. 1 "E, 530.4E, 262.6