RU2159845C2 - Gear to clean reservoirs from slurry carrying oil - Google Patents

Abstract

FIELD: oil industry. SUBSTANCE: gear to clean reservoirs from slurry carrying oil has pump, pipe-line to feed working fluid into reservoir and washing hydraulic head. Set coming in the form spruce-type tube with distributing branch pipes terminating in nozzles which direct jet of working fluid to bottom of reservoir at angle up to 135 degrees is used in the capacity of washing-out system. EFFECT: enhanced efficiency of cleaning of reservoirs from slurry carrying oil.

Description

 The proposal relates to the field of the oil industry, in particular to technological processes for the cleaning, refining and disposal of oil-containing sludge that accumulates in tanks for various purposes.

 It is known that during the operation of raw, technological and buffer tanks at central collection points, bottom oil-containing sludge accumulates, the volumes of which depend on the composition of crude and marketable oil. For normal operation of the tank, it is necessary to periodically clean them from oily sludge.

 Currently known devices for cleaning tanks from oil-containing sludge accumulating in them are based on the mechanical destruction of resin-paraffin deposits using a wash head through which water or solution is fed by a special unit (V.F. Evtyukhin, S.G. Malakhova and deposits of oil products ". Thematic review. - M .: 1984, p. 34). But the known device for cleaning tanks from oily sludge is associated with high material costs for the construction of special plants.

 The closest in technical essence is a device for erosion of sediment in tanks, containing the inlet pipe, nozzle nozzle and a mechanism for moving the nozzle nozzle through a screw pair (A.S. N 1776464, BI N 43, 1992). However, the device is difficult to manufacture, mounted through a special inspection hatch and works in a unit with an aggregate for supplying water or a solution with a large pressure drop.

 The aim of the proposed device is to increase the efficiency of the tank process from the accumulating oil-containing sludge.

This goal is achieved by the fact that in the described device for cleaning reservoirs for various purposes from oil-containing sludge accumulating in them, including a pump, a pipeline for supplying a working fluid to the reservoir, a flushing hydraulic head, a kit in the form of a Christmas tree pipe with distribution pipes that end with nozzles directing the jet of working fluid to the bottom of the tank at an angle of up to 135 ^o .

It is known that the use of an autonomous wash head leads to high energy costs to create a large pressure drop, since the destruction of oily sludge deposits is carried out by the energy of the jet on a small area of the bottom of the tank. The use of a pipe set in the form of a “Christmas tree” with distribution pipes that end with nozzles directing the jets of the working fluid to the bottom of the tank at an angle of up to 135 ^° as a washing system allows to obtain new effects:
- simultaneous cleaning of oily sludge over the entire surface of the tank bottom;
- exclusion from the system for cleaning the tanks of a special pumping unit, since the pumps operating in the production, transport and oil preparation systems are used to create a differential pressure on the nozzles;
- crude or hot marketable oil is used as the working fluid;
- pipes of the "Christmas tree" type with distribution pipes are used as a device for introducing crude or marketable oil into the process tank;
- the accumulation of bottom oil-bearing sediments is excluded in the future, since a constant erosion of the bottom of the tank is carried out;
- increase the erosion zone of bottom sediments by each nozzle due to the direction of the working fluid at an angle of up to 135 ^o .

 Cleaning the tank from the accumulating oily sediments in them using the claimed device is carried out in the following sequence (see drawing).

 In the lower zone of the tank 1 through the pipe 2 is introduced through a system of pipes 3, which end with nozzles 4, hot commodity oil, which serves as a working fluid. The jets of hot commercial oil gradually erode the oily sludge 5, the resin-paraffin deposits are resuspended in the volume of the working fluid and are taken through the intake device 6 in a mixture with an oil stream through a pipeline to an oil treatment unit or for pumping. After cleaning the tank, the system in the form of a tree-type pipe can be used as a switchgear for introducing oil, which eliminates the subsequent accumulation of oily sediments in the tank.

Claims (1)

A device for cleaning reservoirs of various purposes from oil-containing sludge accumulating in them, including a pump, a pipeline for supplying a working fluid to the reservoir and a flushing hydraulic head, characterized in that a set in the form of a tree-like pipe with distribution nozzles is used as a flushing system end with nozzles directing the jet of working fluid to the bottom of the tank at an angle of up to 135 ^o .