The method of preparation of the mixture nepremirimoi

 

(57) Abstract:

The invention relates to road-building materials and can be used for structural pavement layers the non-rigid type, also to strengthen the soil of road embankments, at the laying of pipelines. The method of preparation nepremirimoi mixture includes a mixture of the oily component with mineral components, and the oily component used oil waste oil sludge, which is treated in several stages: original oil sludge washed from light fractions of oil, heated to 60-65S fresh water containing a water-soluble demulsifier at the rate of 100 to 120 g of demulsifier/m3fresh water at a ratio by volume of heated water demulsifier: washed the slime 2 : 1, followed by desalting and washing the sludge with fresh water until the chloride content of salts in the wash water is not more than 0.1 %, then the oil sludge is mixed with mineral components in the ratio 1: 5. Improved water resistance, strength due to good adhesion between astringent sludge and mineral components. table 1.

Izopet the OEB non-rigid road pavement type, to strengthen the soil of road embankments, in pipeline.

Production activities of oil and gas companies inevitably has an anthropogenic impact on the natural environment, so the issues of environmental protection and rational use of natural resources are important. One of the most dangerous pollutants are waste oils and oil sludge.

The sludge due to the significant content of the oil can be attributed to the secondary material resources. Use it as raw materials are one of the efficient methods of disposal, as this is achieved certain environmental and economic benefits.

Famous mix asphalt, including asphalt, surface-active additive - oil slurry and mineral material (U.S. Pat. OF THE RUSSIAN FEDERATION NO. 1025712, IPC 7 08 L 95/00, 1983). The aim of the invention is to improve the water resistance of the coating. The disadvantage is the high cost of development.

The closest technical solution of the present invention is a method for preparing nepremirimoi mixture comprising the mixture of heated mineral components with oil and zerocode is -1:1.7 and heated to 135-140 C, and mixing with oil is carried out at a temperature of 130-S (U.S. Pat. OF THE RUSSIAN FEDERATION NO. 1323543, IPC 7 04 26/26, 1987). However, the disadvantage of this method is the complexity of the mixture, because it requires heating to a certain temperature, high development costs.

The purpose of the proposed technical solution is the improvement of the water resistance, durability of the coating due to the good adhesion between astringent sludge and mineral components.

Also the aim of the present invention is to reduce the cost and simplify the process of mixing and recycling of production wastes oil and gas companies.

This objective is achieved in that in the method of preparation nepremirimoi mixture comprising the mixture of the oily component with mineral components, according to the invention as the oily component used oil waste oil sludge, which is treated in several stages: original oil sludge washed from light fractions of oil, heated to 60-65S fresh water containing a water-soluble demulsifier from rashaya from 100 to 120 g of demulsifier / m3fresh water with regard to the sludge with fresh water until the chloride content of salts in the wash water is not more than 0.1%, after that the oil sludge is mixed with mineral components in the ratio 1:5.

To prepare nepremirimoi mix used oil waste oil sludge. The main source components oil sludge are oil, oil products, mineral water and suspended solid substances of different origin - sand, clay, insoluble salts. /Technology for the use of the mixture of sludge with road gravel in the construction of roads”. RD 03-00147275-088-2003. Introduction with 01.05.2003 g/.

As the demulsifier can be used the demulsifier snpch-4410, produced according to TU-39-05765670 OP-160-93 or snpch-4460, produced according to TU-39-05765670 OP-155-92.

As a mineral component to use the following components: gravel, sand, crushed stone or other similar component.

The essential difference of the present invention is that the oil sludge is initially washed from light fractions of oil, followed by desalting and then spend washing the sludge with fresh water. The treated sludge is mixed with the mineral component, such as gravel, in the ratio of 1:5.

For cooking oil mix used necessasarily quality:

The oil content of Up to 1.0 g/kg

The water content Up to 1 wt.%

The content of chloride salts To 0.1 g/kg

Content of mechanical

impurities Up to 5 wt.%

As mineral components use the following components gravel, sand, crushed stone.

Of scientific and technical literature and patent literature is not known to the application and preparation nepremirimoi mixture approach.

The essential difference of the present invention is that the oil sludge is pre-treated in several stages: initially washed from light fractions of oil, followed by desalting and washing of the sludge from chloride salts. After that, the treated sludge is mixed with the mineral component, such as gravel, in the ratio of 1:5.

An example of a specific implementation.

The accumulation of sludge occurs in the vertical water tanks. The slime is a bottom sediment consisting of sand, clay and sediment asphalt, wax and resins (ASPO). When light fractions of oil produced in steel tanks, the tanks before emptying and cleaning of sludge.

Technology launder lung Prakriti to the highest possible level to the lower level of technological pipelines, incoming and outgoing from the tank).

In the tank intensively served heated to 60-65S fresh water containing a water-soluble demulsifier snpch-4410 based 100...120 g/m3the produced water.

The ratio of the volume of heated water with the demulsifier and the washed slurry sludge in the tank is at least 2:1. The time separation of light fractions of oil from sludge precipitation is 24 to 48 hours. After a specified time accumulated oil pumped in the system of collection and preparation of oil. Subsequent operations desalting sludge process water produced at the facility desalting. Desalting is performed until reaching the content of chloride salts in the wash water by 1%.

After washing light fractions of oil and chloride salts of oil-slime must have the following quality indicators:

The oil content of Up to 1.0 g/kg

The water content Up to 1 wt.%

The content of chloride salts To 0.1 g/kg

Content of mechanical

impurities Up to 5 wt.%

Water after the process of washing of salts is pumped to the treatment plant and system reservoir pressure maintenance.

The mixture of oil sludge is prepared as the use of sludge in road construction as a binder, increase the quality of gravel due to increase strength, lower water absorption and reduce the cost of pavement.

In OOO "NGDU Krasnoholmskneft" experimentally in laboratory conditions optimal ratio of the mixture of sludge and gravel. In the ratio of 1:5 (1 part oil, 5 parts of road gravel) the content of chloride salts in the mixture is...0,09 0,06%. The study of samples from sludge pits EPT Chairmanof" and NSP "Red Hill" OOO "NGDU Krasnoholmskneft", showed that the sludge does not present a radiation hazard.

The sludge and gravel transported on the roads, distributed and mixed to homogeneity in a ratio of 1:5.

The mixture of sludge and gravel was Toxicological and radiological examination in the Republican Center of state sanitary and epidemiological supervision of the Republic of Bashkortostan and the territorial Department on environmental protection and its use for the construction of roads 4 categories received permission (No. 300 from 30.08.01).

Received nefteynaliva mixture is non-explosive, non-flammable and does not support combustion. Maximum allowable concentration (MAC) on the content of chloride salts in neftechimleasing way method testirovanie according to GOST 26425-85. Oil content was determined by calculation according RD-00147275-054-99 (Leadership. document. Accounting for the formation and movement of the sludge.)

Methods of chemical analysis of sludge

Determination of the mass fraction of water in the sludge.

The principle of the method. The method is based on the dissolution contained in the slurry oil dehydrated solvent (water-insoluble), the Stripping and trapping contained in the sludge water receiver-trap.

All utensils used during testing must be clean and dry. Used receiver-trap with a scale not less than 10 ml is Taken linkage of the investigated sludge (25-26 g) and transferred to a distillation flask (round bottom flask with a cut in the composition AKOV), there was added 100 ml of dehydrated solvent, stirred contents of the flask to dissolve the oil.

The capacity of the distillation vessel and receiver traps selected depending on the intended water content in the sludge.

Collected in the apparatus for the quantitative determination of water AKOV so as to ensure the tightness of all connections, to prevent leakage of solvent vapor and the penetration of external moisture (Zack the training AKOV to work include the mantle and bring to boiling solvent, the rate of condensation of the distillate in the distillation flask should be 2-5 drops per second. Is the distillation of the solvent together with water contained in the sludge, and collect in the trap AKOV. The distillation is stopped when the amount of water in the sink-trap becomes stable, the upper layer of the solvent in the trap will be transparent. Time distillation of no more than 40-50 minutes Remaining on the walls of the tube refrigerator water droplets collide at the receiver trap with a glass rod or metal wire.

If the receiver is trapped gathered a small amount of water and the solvent over it muddy, the receiver-the trap is lowered to 15-20 minutes in hot water to destroy turbid emulsion. In that case, when the level of the congregation of the water in the sink-trap exceeds the division of the scale, then turn off the heat and allow to cool trap to room temperature. Disconnect the trap from the device and gently syringe sucked off the necessary amount of the accumulated water. Then connect the trap to the unit and continue the test.

After distillation enable to cool down the unit, then disassemble it and throwing a glass rod or wire drops of water from the walls of prci this amount is added to the measuring volume in the trap).

The contents of the distillation vessel (dehydrated sludge) is used for subsequent determination of mechanical impurities.

The calculation of the mass fraction of water

Mass fraction of water in percent is calculated by the formula

X=V0/m 100,

where V0 is the volume of accumulated water, cm3;

m is the sample mass, g density of water is 1000 kg/m3), the discrepancy between the two experiments should not exceed 5%.

Determination of mechanical impurities in the oil sludge

The essence of the method consists in filtering dewatered sludge with pre-dissolving it in toluene, washing the precipitate on the filter with a solvent, followed by drying, an additional washing with distilled water, drying, and weighing.

All solvents used in the analysis should be filtered and heated on a water bath, without boiling.

Paper filter used for filtering, have dimensions exactly match the bottom of the Buchner funnel. The filter must be placed in a tube and bring to a constant weight. A Buechner funnel to insert in the neck of the flask vyurts using tightly fitted rubber stopper and connected to the vacuum or water is retele, lay on the bottom of the funnel so that it fits close to its walls. The funnel is filled with a solution of no more than 3/4 height, each new piece is added after filtration of the previous portion. If the filter cake is not soluble in hot toluene, then you need to use an additional washing of the filter heated spirtitually mixture.

In the distillation flask with dehydrated sludge to add heated toluene volume of 30-40 ml, mix thoroughly. To enable the pump to pricesat paper filter to the bottom of the funnel by pouring pure solvent and then transferred using a glass rod the contents of the flask on the filter. The flask and glass rod several times to rinse with hot solvent, transferring it to the filter. After filtration, the filter residue washed with hot toluene to until the filter will not be traces of Nefteprodukt and the solvent will drain completely transparent and colorless. The filter with the precipitate to dry in air for 15-20 minutes and then spend the hillshade from water-soluble salts of hot distilled water until no chloride ions in the filtrate. The presence of the chloride ions to determine a solution of 0.05 N nitric acid silver.

At the end Broadcom in buxa brought to constant weight.

The calculation of the mass fraction of mechanical impurities

Mass fraction of mechanical impurities (X) in% is calculated by the formula

where m1 is the mass of buxa with paper filter and mechanical impurities, g;

m2 is the mass of buxa with clean filter, g;

m3 is the mass of the dehydrated samples in the sludge and the amount of separated water.

(m3=m-Vo)g

The calculation of the mass fraction of oil in the sludge

The oil content in the sludge, depending on area sampling can reach 25-90%.

Mass fraction of crude oil (X) is calculated by the formula

X=100-(XB+Hmm.p.+X loss),

where x is the mass fraction of oil, %;

Hmm.p.- mass fraction of solids, percent;

X loss - mass fraction loss during the experiment.

Test specimens were prepared according to GOST 12801-98 and GOST 30491-98.

Properties of the proposed nepremirimoi mixtures shown in the table.

The table shows that the optimal ratio is 1:5 (1 part sludge and 5 parts gravel).

The road surface with the use of oil sludge is carried out in the following sequence.

Previously conducted preparatory work - based clean from dirt and implement loosening and R is m spread on the road surface in an amount of 5 m3100 m2the railroad bed, the gravel is also spread on the roads in the amount of 15 m3100 m2the railroad bed. Mix the sludge and gravel until smooth in a ratio of 1:5 and condense a mixture of self-propelled rollers. The movement opens in 7 days after final compaction rollers.

Technical appraisal and economic benefits of the proposed method

The proposed method allows to obtain naftaenergo mixture of good quality.

The coating obtained from the proposed mix, water resistance and strength is not inferior to the prototype.

The proposed method can efficiently dispose of oily waste-sludge.

The method of preparation nepremirimoi mixture comprising the mixture of the oily component with mineral components, characterized in that as the oily component used oil waste oil sludge, which is treated in several stages: original oil sludge washed from light fractions of oil heated to 60-65S fresh water containing a water-soluble demulsifier at the rate of 100 to 120 g of demulsifier/m3fresh water at the ratio by volume of podagra the Oh water to a content of chloride salts in the wash water is not more than 0.1%, after that the oil sludge is mixed with mineral components in the ratio of 1 : 5.

 

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