RU2744918C1 - Method for cleaning the outer surface of the tank wall - Google Patents

Abstract

FIELD: oil industry.

SUBSTANCE: invention relates to the field of pipeline transportation of oil and oil products and namely to methods of cleaning the outer surface of the wall of a tank for storing oil and oil products and maintaining the tank in a standard state. The method for cleaning the outer surface of the tank wall includes preparing a washing solution and supplying it to the tank wall. At the same time, before cleaning, the tank is equipped with a stationary water cooling system containing a structural unit with valves and a pipeline, a filtering device, a riser and an irrigation pipeline. Before cleaning, at least one container with a cleaning solution is installed between the filtering device and the pipeline of the structural unit with valves. Install the plug. At least one container with a cleaning solution is connected to at least one pump unit with at least one pumping hose. The pumping unit is connected through the sleeve to the filtering device, which is connected to the riser and the irrigation pipeline of the stationary water cooling system of the tank, after which the washing solution is supplied to the outer surface of the tank wall and is cleaned.

EFFECT: invention reduces cleaning time due to covering the entire area of the outer surface of the tank wall, eliminates the use of additional hinged structures and consumables associated with their use, which leads to decrease in the labor intensity of the cleaning work.

3 cl, 1 dwg

Description

The invention relates to the field of pipeline transportation of oil and oil products, in particular, to methods of cleaning the outer surface of the wall of a tank for storing oil and oil products, maintaining the tank in a standard condition.

A known method of cleaning the outer surfaces of shop windows, pavilions, windows of houses and other surfaces, including the outer surface of the walls of tanks by the method of industrial mountaineering (GOST Ρ 51870-2014 "Professional cleaning services - cleaning services. General technical conditions", Moscow, Standartinform, 11.11.2014 , https://alpguru.ru/mojka-rezervuarov-dlya-xraneniya-nefti.html)

This method has the following disadvantages:

- high labor intensity, significant time costs with a large surface area;

- the need for specialized training of work performers;

- increased danger associated with working at height.

A known method of washing and cleaning the outer surfaces of vehicles, rolling stock of railway transport, air transport and other mobile vehicles using the supply of a cleaning solution under pressure (invention RU No. 2245807, IPC B60S 3/04, 10.02.2005, utility model RU No. 192931, IPC B60S 3/04, 08.10.2019, invention RU No. 2313407, IPC В08 В 3/02, 27.12.2007).

This method has the following disadvantages:

- high labor intensity, significant time costs with a large surface area;

- attraction of specialized equipment (tower lift);

- the impossibility of placing the tower of the lift in the tank square;

- increased danger associated with working at height.

As the closest to the claimed invention analogue can be considered a method for cleaning the walls of tanks, proposed in the patent for invention RU No. 2722324, IPC B65D 88/00, 05/29/2020, in accordance with which cleaning the outer wall of the tank is carried out by means of a device for cleaning the walls tanks fixed to a lifting device. The device contains a system of brushes for cleaning from coarse dirt, as well as a washing solution supply system, with the help of which the washing solution is directed to the walls of the tank under pressure. The device is moved up and down the surface of the tank wall until the tank walls are completely cleaned. Each step of the passage of the device for cleaning the walls of the tanks is limited by its width.

The disadvantages of this method are:

- time costs associated with the limited width of the cleaned surface;

- the need to create a special hinged structure;

- relatively high labor intensity of the cleaning work carried out.

The objective of the claimed method is to clean the outer surface

tank walls in a shorter period of time compared to existing analogues, reducing the labor intensity of the cleaning work.

The technical result achieved when using the claimed method consists in reducing the cleaning time due to covering the entire area of the outer surface of the tank wall, eliminating the use of additional hinged structures and consumables associated with its use, which leads to a decrease in the labor intensity of the cleaning work.

The specified technical result is achieved, and the problem is solved in that the method for cleaning the outer surface of the tank wall includes the step of preparing a washing solution and supplying it to the tank wall, and before cleaning the tank is equipped with a stationary water cooling system containing a structural unit with valves and a pipeline, a filtering device , a riser and an irrigation pipeline, before cleaning, at least one container with a cleaning solution is installed, a plug is installed between the filtering device and the pipeline of a structural unit with valves, at least one container with a cleaning solution is connected to at least one pumping unit at least one pumping sleeve, the pumping unit is connected through the sleeve to the filtering device, which is connected to the riser and the irrigation pipeline of the stationary water cooling system of the tank, after which the washing solution is fed to the outer surface of the wall p tank and clean it.

A 3% aqueous solution of oxalic acid can be used as a washing solution.

A tank truck can be used as a container with a cleaning solution.

The invention is illustrated graphically (Fig.), Where:

1 - plug;

2 - filtering device;

3 - ball valve;

4 - sleeve;

5 - container with washing solution;

6 - structural block with valves;

7 - tee;

8, 9 - pumping sleeves;

10 - pumping unit;

11 - irrigation pipeline of the stationary water cooling system of the tank;

12 - riser.

The claimed method is implemented on tanks equipped in accordance with SP 155.13130.2014 with a stationary water cooling system for the tank, which consists of a horizontal sectional irrigation ring (irrigation pipeline, with devices for spraying water), located in the upper belt of the outer surface of the tank wall, risers and horizontal pipelines connecting the sectional irrigation ring to the fire-fighting water supply network, and valves to ensure the supply of water in the event of a fire to cool the entire outer surface of the tank and any quarter or half of it (counting along the perimeter), depending on the location of the tanks in the group.

To implement the claimed method, a part of the stationary water cooling system of the tank is used, namely, the riser 12 and the irrigation pipeline 11. The claimed method consists in cleaning the outer surface of the tank wall by supplying the cleaning solution to the riser 12 and the irrigation pipeline of the stationary water cooling system of the tank 11 by pumping units 10 from free-standing containers 5 through sleeves 4, 8, 9. This eliminates the ingress of the cleaning solution into the unused areas of the stationary water cooling system of the tank by overlapping them.

The claimed method can be implemented as follows. In the flange connection between the filtering device 2 and the section of horizontal pipelines from the side of the structural block with valves 6, a plug 1 is installed to prevent the ingress of the cleaning solution into the unused areas of the stationary water cooling system of the tank. Hose 4 is connected to the filtering device 2 through a ball valve 3 and a Bogdanov nut (not shown in the figure), the other end of which is attached to a tee 7, to which hoses 8 and 9 are also connected through a Bogdanov nut (not shown in the figure). Each the hose 8 and 9 is connected through the pumping unit 10 to the container with the washing solution 5. The containers 5 can contain a ready-made washing solution or mix the components to prepare the washing solution, for example, mixing water with concentrated oxalic acid to obtain a 3% solution. After the preparation of the washing solution, the pumping units 10 are started and the washing solution is distributed through the riser 12 and the irrigation pipeline of the stationary water cooling system of the tank 11 along the outer wall of the tank, cleaning it. Further, the washing solution enters the leakage collection tank (not shown) through the industrial rainwater drainage system and is disposed of. Flushing of the residues of the detergent is carried out with clean water through the same riser 12 and the irrigation pipeline of the stationary water cooling system of the reservoir 11.

Claims (3)

1. A method for cleaning the outer surface of a tank wall, including preparing a washing solution and supplying it to the tank wall, characterized in that, prior to cleaning, the tank is equipped with a stationary water cooling system containing a structural unit with valves and a pipeline, a filtering device, a riser and an irrigation pipeline, before cleaning, at least one container with a washing solution is installed between the filtering device and the pipeline of the structural unit with valves and a plug is installed, at least one container with a washing solution is connected to at least one pumping unit by at least one pumping hose, a pumping unit through the sleeve is connected to the filtering device, which is connected to the riser and the irrigation pipeline of the stationary water cooling system of the tank, after which the washing solution is supplied to the outer surface of the tank wall and is cleaned. 2. The method according to claim 1, characterized in that a 3% aqueous solution of oxalic acid is used as the washing solution. 3. A method according to claim 1, characterized in that a tank car is used as a container with a washing solution.

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