Device to clean soil of oil products

FIELD: process engineering.

SUBSTANCE: invention relates to reclamation of soils contaminated with oil products, decontamination of soils, liquidation of oil spillage, etc. Proposed device comprises intake bin, mixer, crusher, cleaned soil handling device, screw conveyor and vibrator. Crusher is arranged above intake bin and communicated via screw conveyor with mixer. Mixer represents and encased horizontal screw mixer with pelletised sorbent dispenser arranged at its top part. Mixer outlet is connected via screw conveyor with drier bin. Drier is composed by housing accommodating belt conveyors to carry the material along the drier and to pour it down onto belt conveyor. Conveyor top runs contact with vibrators mounted there under. Said vibrators are composed by roller eccentrics with individual or group drive. Burners to combust sorbent with oil products are arranged in drier housing above said conveyors. Drier top section accommodates the off-gas collection chamber communicated with cyclone and absorber via smoke sucker. Cleaned soil handling device is mounted at outlet of the last conveyor and composed by discharge channel connected with opening in drier housing sidewall to be closed by shutter.

EFFECT: higher intensity of oil removal irrespective of seasons.

1 dwg

 

The invention relates to the protection of the environment, namely the remediation of oil-polluted lands, disposal of soil, liquidation of emergency floods of oil and mineral oil.

A device for cleaning the capillary-porous medium, comprising a chamber for placing the cleaned environment with electrodes connected to a constant current source, the capacity of the treated liquid and the container for waste fluid (EN 2106432 C1, IPC 6 C25C 1/22, publ. 10.03. 1998).

Famous line for cleaning contaminated soils, soil and sludge containing hopper, a screw conveyor, the capacity of the overflow oil, vibrating screen, boot grill, washer (EN 2244686 C1 IPC C02F 1/40, publ. 20.01. 2005).

The disadvantage of the above devices analogue design is the complexity and cost of the process of cleaning contaminated soil and sludge, which consists in multistage treatment process.

Closest to the proposed device is to install, taken as a prototype, containing a bunker with a mixing device, with the device for transporting liquid in the form of a screw conveyor in the capacity of the overflow and the output device is a solid inclusions, the delivery system of washing liquid vibrator (EN 2330734 C1 IPC B09C 1/00, publ. 10.08.2008,).

The lack of PR is the totype is the lack of efficiency of cleaning soils from petroleum products, additional economic costs required for mixing the contaminated material with water, laundering of contaminated material with water, separation of the pure material in liquid and solid phase, i.e. water and oil. The impossibility of operation of the device in the cold season, as the water used to launder soil from oil, freezes, which reduces the efficiency of cleaning soils from petroleum products.

The objective of the proposed device for cleaning soil from petroleum products is to increase the efficiency of cleaning the soil from petroleum products, as well as reducing the economic cost of additional operations, such as mixing the contaminated material with water, laundering of contaminated material with water, separation of the pure material in liquid and solid phase.

The technical result from the use of the device for cleaning soil from petroleum products is achieved by the fact that it includes a hopper, a mixing device, the device for shipment of treated soil, screw conveyor, vibrator, unlike the prototype, it has established under the receiving hopper, crusher, screw conveyor connected with the mixing device made in the form of a horizontal in the case of screw agitators in the upper part of which is mounted a dispenser for granulares the spent sorbent, the output of the mixing device is connected to screw conveyor with hopper dryer, representing a body placed in it, one above the other belt conveyors on which the material is moved along the dryer and poured into a located below the conveyor belt, the upper branch of the conveyor in contact with established under them vibrators made in the form of eccentric roller having individual or group drives, in the case of the dryer under the conveyors installed burner for combustion of the adsorbent adsorbing the oil in the upper part of the dryer is a camera for collecting exhaust gases, connected through the cyclone and the absorber with smoke, and the device for shipment of treated soil is placed on the output the last of the conveyor and is an outlet channel connected to a slot in the lower portion of the side wall of the casing of the dryer, close the gate.

General view of the device shown in the drawing.

The device includes a hopper 1, the crusher 2, the screw conveyor 3, the hopper 4 mixing device, mixing device 5 in the form of screw agitators, metering device 6 for granular sorbent, the hopper 7, the conveyor belt 8, the lead 9 and the driven rollers 10, the dryer 11 tunnel type, eccentric roller 12 of the vibrator 13, the gas burner 14, ve is tilator 15 to supply air into the dryer, the camera 16 for collecting the exhaust gases, the cyclone 17, the absorber 18, the exhaust fan 19, the gate 20, an outlet channel 21, the hole 22.

The operation of the device is as follows.

Contaminated petroleum soil (soil) using a bucket loader (not shown) is fed into a hopper 1, is built into the upper part of the crusher 2, which reduces the size of the lumps of soil.

The crushed soil with oil products by means of the screw conveyor 3 moves into the hopper 4 mixing device 5 in the form of a screw mixer. The sorbent is fed into the mixer through the spout 6. In the mixer is mixing the soil with oil products from the sorbent, which are used as active charcoal, and graphite powder with a macroporous structure, sorbent based on graphene. While it adsorbs drops of oil adhering to the surface of the soil. Further, the material (soil, mixed with the adsorbent and adsorbed oil) through the screw conveyor is fed into the hopper 7 of the dryer 11. From the hopper 7, the material falls on the upper belt conveyor by which it is moved along the drying chamber and poured into situated below the middle line and then at the bottom conveyor belt. An endless conveyor belt 8 is stretched between the lead 9 and the driven rollers 10. The combustion of gas in the burners 14 installed in the dryer, obrazets the combustible gas, which penetrates the layer of material on the upper, middle and lower conveyor belt 8. To maintain the combustion process in the kiln through the fan 15 is air. The influence of low-frequency oscillations at layers of material located on the upper branches of an endless conveyor belt 8, is created by using eccentric roller 12 of the vibrator 13. Eccentrics have individual or group drive (not shown). Under the action of heated gases sorbent with adsorbed oil is burned and converted into exhaust gases, which is collected in the chamber 16 of the dryer. The resulting combustion sorbent with adsorbed oil exhaust gases pass into the cyclone 17 and then to the absorber 18, where they are cleaned, and using exhaust fans 19 are released into the atmosphere. When opening the gate 20, closing the hole 22, the treated soil is shipped from the dryer through the outlet channel 21 in the container or the vehicle (not shown).

If necessary, the exhaust gases can be used for recovery dryers.

Implementation of the invention allows to significantly increase the intensity of cleaning the soil from petroleum products regardless of warm or cold season, as the exploitation of known analogs and prototypes based on the use of water for ottavani the contaminated soil from oil, in the winter time of year can not be implemented, and also to reduce the economic costs of additional cleanup operations.

Device for cleaning soil from mineral oil containing a hopper, a mixing device, the device for shipment of treated soil, screw conveyor, vibrator, characterized in that it has established under the receiving hopper, crusher, screw conveyor connected with the mixing device made in the form of a horizontal in the case of screw agitators in the upper part of which is mounted a dispenser for granular sorbent, the output of the mixing device is connected to screw conveyor with hopper dryer, representing a body placed in it, one above the other belt conveyors on which the material is moved along the dryer and poured into a located below the conveyor belt the upper branch of the conveyor in contact with established under them vibrators made in the form of eccentric roller having individual or group drives, in the case of the dryer under the conveyors installed the burner for combustion sorbent of oil in the upper part of the dryer is a camera for collecting exhaust gases, connected through the cyclone and the absorber with smoke, and the device for shipment of treated soil is s placed at the output of the last line and is an outlet channel, coupled with a hole made in the side wall of the housing of the dryer, close the gate.



 

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2 tbl

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2 tbl

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6 ex

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3 dwg

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