RU2426833C1 - Installation and procedure for purification from oil, oil products and oil slime - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: invention refers to installation for purification form oil, oil products and oil slime consisting of loading receiving hopper connected with device for wringing mixture of oil slime with absorption material - cellulose fibre, also device is made in form of screw press. The wringing device contains a hopper for collection of pressed liquid fraction where after there is installed a breaker of the rest of solid fraction, a sizer with a hopper for removal of heavy fraction from solid fraction and a separator with a hopper for solid fraction - cellulose fibre. The invention also refers to procedure for purification from oil, oil products and oil slime implemented in the installation.

EFFECT: raised efficiency of purification from oil slime, reduced cost of sorbent.

2 cl, 1 dwg

Description

The invention relates to the field of collection and processing of oil sludge.

A known line and method of processing oil sludge, including collecting oil sludge, heating and roughing, separation of products in a hydrocyclone, centrifuge and separator [RU 2026831 C1, IPC ⁷ C02F 11/00, 1995].

The main disadvantages of the line are the need to dilute and heat the sludge. In addition, the quality of its cleaning is low.

A known installation for cleaning oil sludge containing a sludge collector (receiving hopper), a device (with a squeezing filter press) for squeezing adsorbent material and receiving hoppers for collecting oil and squeezed adsorbent material [New high technologies for the oil and gas industry and energy of the future. (Reports of the section "Environmental problems of the gas and oil industry"). M., 1996, - p.105-106, Fig. 2].

The installation is cumbersome and does not provide the return of the adsorption material to the secondary production.

To solve the technical problem facing the invention, the installation for cleaning oil, oil products and oil sludge contains a loading hopper connected to a device for squeezing a mixture of oil sludge with adsorption material - cellulose fiber. The squeezing device is made in the form of a screw press and contains a hopper for collecting the squeezed out liquid fraction, after which a grinder of the remaining solid fraction is installed, and a classifier with a hopper for removing the heavy fraction from the solid fraction and a separator with a hopper for the solid fraction - cellulose fiber.

To increase the efficiency of collection and purification of oil sludge, as well as oil and oil products by increasing the efficiency of the adsorbent used and the possibility of re-returning the adsorbent to production, it is necessary to use a sorbent based on cellulose fiber [URL: www.iso-tech.ru/info /22-sorbent-na-osnove-celluloznogo-volokna.html].

The method carried out in the proposed installation includes mixing raw materials with adsorption material, which is used as a cellulose fiber. Then, the mixture is pressed, the selected liquid and heavy solid fractions are sent for processing, and the pressed fiber (solid fraction) is sent for recycling for mixing with the raw material.

Tests have been carried out, confirming the high degree of collection of oil sludge. The solid residue (cellulose fiber) after grinding and separation of solid sludge from it is returned for reuse.

The invention is illustrated in the drawing, which shows a diagram of an installation for the purification of oil sludge (oil sludge).

The installation has a receiving hopper 1 for loading the device 2, intended for pressing a mixture of adsorption material and oil sludge. The device 2 is made in the form of a press (for example, a screw) with a hopper 3 for the liquid fraction. At the exit from the screw to the device 2 is attached a fan chopper 4 and then a classifier 5 with a hopper 6 for sludge and a separator 7 with a hopper 8 for cellulose fiber. The smallest solid fraction from the separator (cyclone) 7 through the filter precipitator 9 enters the hopper 10 to collect dust.

Oil sludge can be mixed with cellulose fiber directly at the site of contamination. In this case, the resulting mixture is loaded into the receiving hopper 1.

In cases where the oil sludge is already collected, it is mixed with cellulose fiber during feeding into the receiving hopper 1. The oil sludge and fiber are separately loaded into the loading hoppers 11 and 12, of which the materials loaded into them are fed into the receiving hopper 1, in which mixer 13 is installed for additional mixing of the mixture. Mixing is carried out "dry", without the use of a diluent.

Oil sludge mixed with cellulose fiber enters the press (for example, screw) 2, in which mixing is first continued, and then the resulting mixture is pressed. Liquid fractions are discharged into hopper 3 and selected for further processing, and the pressed cellulose fiber with mechanical impurities is crushed in a grinder 4 and fed to gravity classifier 5, where it is separated into pressed fiber and mechanical impurities (heavy fraction) discharged into hopper 6.

The heavy fraction (sand, soil) is discharged to the place of accumulation, and the squeezed cellulosic fiber is fed to the cyclone separator 7, where it is divided into fiber entering the hopper 8 and suitable for reuse, and the fine fiber fraction accumulated in the hopper 10 for further recycling. The fiber can be reused at least four times, which significantly reduces the cost of the sorbent.

The squeezed water-oil emulsion is separated into water and oil product, the heavy solid fraction and the fine fiber fraction are sent for disposal, and cellulose fiber from the hopper 8 can be fed into the loading hopper 11. The heavy solid fraction can be used when filling roads.

Cellulose fiber (cotton wool) is produced from waste paper on domestic equipment and is mainly used as a building insulator of cold, heat and noise. Currently, the cost of fiber production is 10-15 rubles per 1 kg.

Tests have shown that one weight part of the fiber absorbs 10 weight parts of oil and oil products. The process of adsorption of oil from a water surface occurs within 30-60 seconds.

Oil-soaked fiber can stay afloat for a long time. Collected from water and land in any known manner.

Cellulose fiber can be applied onto a contaminated surface manually or by spraying. The spraying equipment available to builders has a capacity of 500 kg of fiber per hour. Within 1 hour, up to 5 tons of petroleum products can be adsorbed. One ton of cellulose fiber forms 32-35 cubic meters. meters of pulp.

Claims (2)

1. Installation for cleaning from oil, oil products and oil sludge, containing a loading hopper connected to a device for pressing a mixture of oil sludge with adsorption material - cellulose fiber, made in the form of a screw press, while the device for pressing contains a hopper for collecting pressed liquid fraction, after which a grinder of the remaining solid fraction is installed, and a classifier with a hopper for removing the heavy fraction from the solid fraction and a separator with a hopper for the solid fraction - cellulose fiber on. 2. The method of purification from oil, oil products and oil sludge, carried out in the installation according to claim 1, comprising mixing the raw material with adsorption material, which is used as cellulose fiber, the mixture is pressed, the removal of the separated liquid and heavy solid fractions sent for processing and pressed fiber (solid fraction) sent for recycling for mixing with raw materials.

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