RU217235U1 - OIL SEPARATOR - Google Patents

Abstract

The utility model relates to the field of treatment of recycled water and oily wastewater and can be used in oil refining, petrochemical, chemical and other industries where it is necessary to purify water from undissolved oil products. The oil separator contains an elongated body, nozzles located inside the body along its longitudinal axis for separating oil from oily water, dividing the inside of the body into a central chamber and side chambers, an oily water inlet system, a clean water outlet system, an oil outlet system, a bottom sediment hydraulic washing system, located in the lower part of the central chamber and made with the possibility of supplying water under pressure, and a system for withdrawing the resulting pulp. To ensure a reliable design for the removal of trapped mechanical impurities from the oil separator, ease of maintenance of the apparatus, reduction of metal consumption and water consumption for washing, the oil separator is equipped with a means that ensures the passage of mechanical impurities deposited in the side chambers to the lower part of the central chamber located under the nozzles. 6 w.p. f-ly, 2 ill.

Description

The utility model relates to the field of treatment of recycled water and oily wastewater and can be used in oil refining, petrochemical, chemical and other industries where it is necessary to purify water from undissolved oil products.

An oil separator is known from the prior art, containing an elongated housing, nozzles located inside the housing along its longitudinal axis for separating oil from oily water, mounted on a solid deck, dividing the internal space of the housing into a central chamber and side chambers, an oily water input system, a clean water output system , an oil removal system, a bottom sediment hydraulic washout system located in the lower part of the central chamber and configured to supply water under pressure, and a system for removing the formed pulp. (see RF patent No. 112185 U1, publ. 10.01.2012).

This technical solution makes it possible to wash out the bottom sediment without stopping the apparatus, which leads to an increase in the reliability of its operation and the effect of cleaning oily wastewater while simplifying the design. However, during the operation of the known oil separator, a large amount of solid deposits settle at the bottom of its side chambers, significantly reducing the working area of the nozzles, which requires periodic shutdown of the apparatus to carry out rather laborious and complex preventive and repair work to remove them.

Mentioned technical problem is partially solved in the oil separator, disclosed in the patent of the Russian Federation No. 201534 U1, publ. 12/21/2020, in which the nozzles are also installed on a solid deck, and the side chambers in their lower parts are equipped with additional systems for hydraulic washing of the bottom sediment and additional systems for removing the pulp, while the walls of the central chamber are equipped with easily removable panels from a hydrophobic nozzle for access to the side chambers.

The present device has improved compared to the previously described oil separator performance of purification of oily water from mechanical impurities, since it allows the bottom sediment to be washed out both in the side chambers and in the central chamber without stopping the apparatus. However, the system of bottom sediment erosion and pulp removal in the side chambers complicates the design, requires additional consumption of washing water and increases the cost of manufacturing the entire apparatus, since additional pipelines for washing water supply and pulp discharge to the sewer are required.

These shortcomings can be avoided if it is possible to remove all precipitated mechanical impurities with one system installed in the lower part of the central chamber.

The technical result to be achieved by the inventive oil separator is to create a reliable design for the removal of trapped mechanical impurities from the oil separator, ease of maintenance of the apparatus, reduction of metal consumption and water consumption for washing.

The specified technical result is achieved due to the fact that the oil separator contains an elongated body, nozzles located inside the body along its longitudinal axis for separating oil from oily water, dividing the internal space of the body into a central chamber and side chambers, an oily water inlet system, a clean water outlet system , an oil removal system, a bottom sediment hydraulic washout system located in the lower part of the central chamber and configured to supply water under pressure, and a pulp output system, equipped with a means that ensures the passage of mechanical impurities deposited in the side chambers to the lower part of the central chamber, located under nozzles.

Due to the use of a means that ensures the passage of mechanical impurities deposited in the side chambers to the lower part of the central chamber located under the nozzles, solid mechanical impurities do not accumulate in the side chambers, but pass to the place of their erosion and removal from the apparatus without the use of additional systems for hydraulic washing of the bottom sediment and systems pulp output. Thus, for the removal of mechanical impurities from hard-to-reach places of the oil separator, additional systems and additional equipment necessary for its operation are not required. It also provides ease of maintenance of the apparatus, reduction of metal consumption and water consumption for washing.

Nozzles for separating oil from oily water can be installed on a support structure that ensures the structural stability of the apparatus, and a means for ensuring the passage of mechanical impurities can be a floor located on the support structure.

Such a floor can be of essentially any design that allows the passage of settling solids into the lower part of the central chamber of the oil separator.

In particular cases of implementation of the utility model, the flooring can be made in the form of a pressed or welded grating flooring, a mesh flooring, a bar flooring, a large-mesh expanded metal sheet that provides stable support for the packing blocks and has a sufficient free cross section for the passage of mechanical impurities deposited in the side chambers into the lower part of the central chamber. The free section of the flooring is at least 70% of the area. The cell size is selected experimentally and is at least 15x15 mm.

In the oil separator of the proposed design, as nozzles for separating oil from oily water, it is advisable to use coalescing hydrophobic nozzles that provide stable and high-performance separation of oil from oily water. If such nozzles are used, it is preferable to place the oily water inlet system in the side chambers, the purified water outlet system in the central part of the central chamber, and the oil outlet system in the upper part of the central chamber.

In addition, the body of the oil separator, along the longitudinal axis of which the nozzles are placed, it is advisable to make a horizontal cylindrical.

The utility model is illustrated by drawings, where:

in fig. 1 shows a top sectional view of an oil separator;

in fig. 2 shows a cross section A-A.

The oil separator contains an elongated body, in particular a horizontal cylindrical body 1 with elliptical bottoms 2 mounted on saddle bearings (not shown). Along the longitudinal axis of the body 1 there are nozzles for separating oil from oily water, in particular coalescing hydrophobic nozzles 5. The nozzles divide the interior of the body into a central chamber 10 and two equivalent side chambers 6 and 7. To ensure the passage of mechanical impurities deposited in the side chambers into the lower part of the central chamber 10, a means 19 is provided located under the nozzles 5. Such a means 19 may be a flooring placed on a support structure supporting the nozzles 5.

The side chambers 6 and 7 are limited by the nozzles 5 themselves, the flooring 19, the walls 8 of the body 1 and the four segments 9 at the ends welded to the body 1. Located between the side chambers 6 and 7, the central chamber 10 is limited by the nozzles 5, four segments 9 and the bottoms 2 of the body . Inside each of the chambers 6 and 7 there are collectors 11 of the oily water input system. In the central chamber 10, along its longitudinal axis, there is a collector 13 for the removal of clean water, and in the lower part there is a system 15 for hydraulic washing of the bottom sediment and a collector 16 for the removal of pulp and sludge. On top of the housing 1 is located the chamber 18 for collecting oil with the corresponding fittings for pumping oil. On the hull 1 and bottoms 2 there are standard technological fittings and manholes, as well as fittings and couplings for installing control equipment devices.

The oil separator works as follows.

Polluted water with an oil content of not more than 300 mg/l enters its side chambers 6 and 7 and is evenly distributed over the volume of the apparatus through the manifold 11.

Inside the oil separator, liquid flows move from the side walls 8 to the center of the apparatus through the coalescing nozzles 5. The average speed in this case should not exceed 1.5 mm/s.

When passing a layer of coalescing nozzles 5, the main part of the oil products is deposited on them and, due to the density difference, floats up along them and forms a layer of oil product in the upper part of the apparatus and then in chamber 18, from which it is discharged as it accumulates into technological containers (not shown).

The mechanical impurities contained in the water are deposited in the lower part of the central chamber and the side chambers 6 and 7. Through the flooring 19, which allows mechanical impurities to settle freely, on which the nozzle 5 is installed, the precipitated mechanical impurities freely pass into the lower zone of the central chamber 10.

To flush the bottom sediment periodically, jointly or independently of each other, the systems 15 for washing out the bottom sediment are switched on. The eroded bottom sediment is discharged through the collector 16.

As a result, a reliable oil separator has been created with an increased time of its operation before the implementation of preventive or repair work and a reduced time for their implementation, reduced consumption of flushing water and reduced metal consumption.

The present technical solution can be implemented both in a newly built device and for the modernization of oil separators known from the prior art, given in the description as a prior art.

Claims (7)

1. An oil separator containing an elongated housing located inside the housing along its longitudinal axis of the nozzle for separating oil from oily water, dividing the internal space of the housing into a central chamber and side chambers, an oily water input system, a clean water output system, an oil output system, a hydraulic washing system bottom sediment, located in the lower part of the central chamber and made with the possibility of supplying water under pressure, and the output system of the resulting pulp, characterized in that it is equipped with a means that ensures the passage of mechanical impurities deposited in the side chambers to the lower part of the central chamber, located under the nozzles. 2. The oil separator according to claim 1, characterized in that the nozzles are mounted on a support structure. 3. An oil separator according to claim 2, characterized in that the means providing the passage of mechanical impurities is a flooring located on the supporting structure. 4. The oil separator according to claim. 3, characterized in that the flooring is made in the form of a pressed or welded grating flooring, mesh flooring, bar flooring, large-mesh expanded metal sheet. 5. Oil separator according to claim. 1, characterized in that the nozzles are coalescing hydrophobic nozzles. 6. The oil separator according to claim 5, characterized in that the oily water input system is located in the side chambers, the treated water output system is located in the central part of the central chamber, and the oil output system is located in the upper part of the central chamber. 7. The oil separator according to claim. 1, characterized in that the body is made of horizontal cylindrical.

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