RU190130U1 - Installation of the catalytic oxidation of the membranes of microorganisms in the process of production of biotechnides in the system of oil production - Google Patents

Abstract

The invention relates to devices for conducting corrosion-metric tests in laboratory conditions in the circulating flow of the working medium, in particular, to the installation of the catalytic oxidation of the membranes of microorganisms in the process of production of biotechnides in the oil production system. The installation of catalytic oxidation of microorganism shells in the process of biotisside production in the oil production system includes electrochemical cells with electrodes sequentially connected by pipeline, gravimetric cells with flat witness specimens, a reagent input unit, a buffer stainless tank with its own lid of the buffer tank, into which are tubes for supplying gases purge, centrifugal pump, and an indicator of corrosion rate is connected to electrochemical cells with electrodes, additionally with contains a control unit to which the centrifugal pump is connected, and also contains a flow meter and a cell with a catalyst and means of hydrogen peroxide in series connected to the centrifugal pump to activate the catalyst, and the cell with the catalyst is connected further along the pipeline to the electrochemical cells with electrodes, and the buffer The stainless tank contains a heating element, which is connected, like the flow meter, to the control unit, level sensors, cat, are built into the cover of the buffer tank. rye are also connected to the control unit. The technical result is to increase the resistance to biofouling and the formation of various microorganisms. 1 hp f-ly, 1 ill.

Description

The technical field to which the utility model

The invention relates to installations and devices for conducting corrosion-metric tests in laboratory conditions in the circulating flow of the working medium, namely, to the installation for the catalytic oxidation of the membranes of microorganisms in the process of production of biotensides in the oil production system.

The level of technology

Known installation of the catalytic oxidation of the membranes of microorganisms in the process of production of biotechnides in the system of oil production (https://www.monicor.ru/doc/psp_stend(cirk_mokr_rotor).rar, discovered 04/26/2019), which includes electrochemical cells connected in series with electrodes, gravimetric cells with flat witness samples, a reagent input unit (corrosion inhibitor), a stainless buffer tank with its own buffer tank lid in which tubes for supplying gases for purging are built in, a centrifugal pump, and an electrochemical A corrosion rate indicator is connected to the cells with electrodes. The disadvantage of this analogue is the lack of full automation of the process. In addition, the disadvantage of the closest analogue is the lack of resistance to biological fouling of the inner surfaces of the supply pipelines, filters, heat exchangers and other process equipment. Biological fouling is a combination of various microorganisms (bacteria, fungi, amoeba, legionella, etc.) that enter the system both with make-up water and from the air as water passes through the tanks. Biofilms are formed in water and provide a protective environment for microorganisms. They create ideal conditions for reproduction, as well as other types of interaction, the exchange of nutrients and genetic material. In biologically active aqueous systems, about 99% of microorganisms live under the protection of biofilms. The protective mechanisms inside the biofilm are so strong that the bacteria in them are extremely resistant, even to chlorine. Therefore, effective disinfection of water is possible only if the biofilm is damaged or destroyed. Biofouling reduces the efficiency of the equipment, contributes to the development of pitting corrosion, interferes with the action of corrosion inhibitors and sediment formation.

Disclosure of utility model

The technical result consists in increasing the resistance in the declared automatic installation to biofouling and formations of various microorganisms by including cells with a catalyst and hydrogen peroxide input means for activating the catalyst, as well as switching on the heating stainless steel buffer element, the flow meter, and sensors connected to the control unit level in the lid of the buffer tank, which allows you to create artificial conditions in the installation close to real th counter for this technology biobrastaniyam by laboratory tests including - with the catalyst cell.

The result is achieved by installing a catalytic oxidation of microorganism shells in the process of biotisside production in the oil production system, including electrochemical cells with electrodes connected in series with a pipeline, gravimetric cells with flat witness specimens, a reagent input unit, a buffer stainless tank with its own buffer tank cap into which feed tubes are embedded gases for purging, centrifugal pump, and speed indicator is connected to electrochemical cells with electrodes corrosion, in addition, it additionally contains a control unit to which the centrifugal pump is connected, and also contains a flow meter and a cell with a catalyst and means of hydrogen peroxide in series connected to the centrifugal pump through the pipeline to a cell with a catalyst connected down the pipeline to electrochemical cells electrodes, and the buffer stainless tank contains a heating element, which is connected as well as the flow meter to the control unit, and in the cover there is a buffer molecular embedded capacitance level sensors are also connected to the control unit.

According to the utility model, the cell catalyst is in the form of a grid.

Brief Description of the Drawings

The essence of the utility model is illustrated by the figure, which shows a diagram of a preferred embodiment of the claimed installation for the catalytic oxidation of the membranes of microorganisms in the process of producing biotensides in the oil production system.

Implementation of the utility model

The diagram shows the installation of catalytic oxidation of microorganism shells in the production of biotechnides in the oil production system, including electrochemical cells with electrodes 1 sequentially connected by pipeline with electrodes 1, gravimetric cells with flat samples-witnesses 2, input unit of reagent 3, buffer stainless tank 4 with its own lid of buffer tank which is equipped with tubes for supplying gases for purging, a centrifugal pump 5, and an indicator is soon connected to the electrochemical cells with electrodes 1 After corrosion 6, it also contains a control unit 7 to which a centrifugal pump 5 is connected, and also contains a flow meter 8 and a cell with a catalyst and hydrogen peroxide injection means for activating the catalyst 9, in series with the pipeline, the cell with the catalyst 9 is connected down the pipeline to the electrochemical cells with electrodes 1, and the buffer stainless tank 4 contains a heating element 10, which is connected like a flow meter 8 to the control unit 7, and the lid is The fernapacity 4 has built-in level sensors 11 which are also connected to the control unit 7.

In a particular embodiment, the cell catalyst can be made in the form of a metal grid, and the hydrogen peroxide input tool for catalyst activation is made in the form of, for example, a rubber stopper of a catalyst cell with a needle inserted into it (for example, through), to which dispensers can be repeatedly connected and disconnected (or syringes, etc.) to inject hydrogen peroxide into the cell on the grid. Moreover, the claimed rubber stopper of the catalyst cell is fixed and fixed in the housing of the catalyst cell.

In other particular embodiments, electrochemical cells with electrodes 1, gravimetric cells with flat witnesses 2, stainless buffer tank 4, centrifugal pump 5 can be connected to the pipeline through inlet and outlet fittings.

The pipeline itself may be made, for example, of metal or plastic or in the form of a rubber connecting hose between the structural elements of the declared installation. Structural elements can be either built into the common pipeline, or interconnected by separate fragments (parts) of the common pipeline.

In another particular embodiment, the electrochemical cells with electrodes 1 are connected to a corrosion rate indicator 6 by means of, for example, contact devices of electrodes and cables connecting the device of the corrosion rate indicator 6 to electrodes.

The essence of the technology is as follows: a cell with a non-consumable metal catalyst (structured Cr-Ni-Fe alloy) is placed in the cooling water stream, where the reagent based on 30% hydrogen peroxide H ₂ O _{2 is} dosed in portions. If hydrogen peroxide is added to the water system, then under the microscope one can observe how individual bacteria combine into certain structures in order to more effectively counteract the aggressive environment. The reason for this phenomenon lies in the higher dipole moment of hydrogen peroxide molecules relative to water molecules. Microorganisms, the surface of which has a negative charge, enter into exchange reactions with hydrogen peroxide, and not with water, which leads to an increase in the effect of dispersion and thereby an increase in van der Waals forces between individual bacteria. After all the hydrogen peroxide has decomposed, the bacteria return to their original independent state. When a catalyst is introduced into the system, the interaction starts to proceed in a completely different way. Hydrogen peroxide molecules adsorb to the catalyst and begin to drag free electrons. As a result, a positive charge forms on the surface of the catalyst, and free microorganisms begin to attract it. When a cell interacts with a positive charge, the van der Waals forces inside the cell membrane noticeably weaken. Polar phospholipid groups break down into tenside molecules. The loss of polar groups destabilizes hydrogen bonds. Internal cell pressure is higher than ambient pressure. The weakened membrane does not withstand the pressure and bursts. The decay products of cells are partially oxidized, forming substances exhibiting the properties of detergents, the so-called "Biotensides". Biotensides, unlike synthetic surfactants (hereinafter referred to as surfactants), are non-toxic, show their activity only at the liquid / solid interface surface and are inactive at the liquid / gas interface, i.e. do not form foams and, most importantly, their structure is very similar to the cell membranes of microorganisms, since they are the products of their partial disintegration. Moving with the flow of water, the biotensides break down the bio-deposits from metal surfaces. As a result, all elements of the system are cleaned (irrigation nozzle, pumping equipment, pipelines, heat exchange equipment, etc.).

The principle of operation of the installation is as follows.

To test the performance of the technology under the conditions of oil production (in reservoir waters), a methodology was developed for laboratory testing of this technology at the declared installation for the catalytic oxidation of microorganism membranes in the process of producing biotensides in the oil production system.

The developed bench installation simulates the process of fluid movement through pipelines with the maintenance of conditions characteristic of an oil-producing field — the absence of oxygen, the presence of carbon dioxide, a certain salinity of water, a certain temperature, the presence of oil products. As a working medium for testing, a reservoir water model (hereinafter referred to as MPV) with a mineral composition is used.

The cells of sulfate-reducing bacteria (hereinafter referred to as SSC) in an amount of not less than 105 cells / ml are introduced into MPV. Medium temperature - 25 ° С. The flow rate of water in all modes - 1 m / s.

The control unit 7 sends a signal and turns on the centrifugal pump 5 in the installation, after which the specified flow rate is maintained by the control unit 7 through the flow meter 8 of the centrifugal pump 5. The control unit 7 also sends a signal to the heating element 10 of the buffer stainless tank 4 to maintain the necessary medium temperatures. After passing through the catalyst, after dispensing the reagent, the test fluid is passed through the circuit, containing SSC in an amount of not less than 105 cells / ml. Next, the medium processed using the tested technology is analyzed for formation / destruction of biofilms, as well as for corrosion by means of a corrosion rate indicator 6. During the experiment with a bactericide, the bactericide is added to the stand installation in the required amount, based on its concentration at continuous dosage and volume of test medium. The objects of the test are, firstly, electrodes for LPR sensors and steel samples, on which the type and rate of corrosion are determined, as well as the number of adhered SSC cells, and secondly, the medium itself, where the level of SBC infection is determined.

Tests are conducted in three modes (the duration of each test is 5 days):

1. Control experience, without reagents and without the participation of the technology being tested.

2. With a bactericide that is used in continuous dosing. The bactericide is added to the test environment and is constantly present in it during the test.

3. With the technology being tested, when processing the medium with it for 5 minutes.

In the process of testing, the composition and temperature of the working medium are maintained and the following parameters are controlled:

1. The corrosion rate (LPR electrochemical method) is constant.

2. The content of hydrogen sulfide in water - once a day

3. The number of planktonic forms of sulfate bacteria is once a day.

4. The amount of the bonded carbon screed adhered to the specimens at the end of the test.

5. The average corrosion rate of samples by the gravimetric method and the local corrosion rate, by the method of determining the depth of ulcers on a double-focusing microscope - at the end of the test.

At each sampling, at least 3 measurements (crops) of SSC and hydrogen sulfide content in water are carried out. The number of LPR sensors is at least 3 per experiment. The number of flat samples - not less than 3 for each experiment.

The test result is issued in the form of a report, which compares the results obtained and determines the effectiveness of the impact of the bactericide and the technology being tested. Efficiency is evaluated for each indicator, the main of which are the number of adhered forms of SSC, the average and local corrosion rates of metal samples.

The harness of the assembled electrochemical cells with electrodes 1, buffer stainless capacitance 4, centrifugal pump 5 and reagent injection unit 3 is made using, for example, a stainless steel hose with an inner diameter of 16 mm, a set of connecting nipples, stainless steel unions and a set of clamping force clamps. The possibility of bypassing the cell with the catalyst is provided.

Stainless buffer tank 4 contains a heating element 10 connected to the control unit 7. Stainless buffer tank 4 is closed with a metal lid, also made of stainless steel, which is fixed by wing nuts on the edges of the tank opening. On the lid there are mounted level, temperature sensors and nozzles for adding and removing gases during testing, opening and closing of input / output lines is regulated by taps.

A centrifugal pump 5 with a magnetic coupling, is connected to the control unit 7, for example, with a frequency converter, a controller and a flow display monitor or a control panel. The flow-through part of the pump unit and the impeller itself are made of a polymeric material, which is guaranteed to retain its properties up to 80 ° C.

The power supply of the control unit from the AC network and control of the pump, the heating element can be carried out using connecting cables such as PVA 3 × 1.5 mm ² and 4 × 1.5 mm ² , 4 × 1.0 mm ² .

The supply of reagents and media to the working medium can be done with a syringe through a needle installed in a rubber stopper, which, in turn, is fixed in the reagent insertion unit 3. U-shaped contact devices can be used to connect the corrosion rate indicator 6 to the electrodes, which are inserted into cell housing windows and crimped electrodes.

In the private embodiment, the indicator of the rate of corrosion can be made in the form of "Monicor-2 M".

Cell with catalyst can be made transparent in the form of a glass flask.

In another private variant, between the buffer stainless container and the centrifugal pump, a ball valve can be built into the pipeline to completely shut off the fluid flow, if necessary, during installation.

Modern technologies and equipment allow us to implement this useful model in production. The plants and enterprises have all the necessary machines and devices for the production of a catalytic oxidation unit for the membranes of microorganisms in the process of producing biotensides in the oil production system.

Claims (2)

1. Installation of catalytic oxidation of microorganisms' shells in the process of biotisside production in the oil production system, including electrochemical cells with electrodes sequentially connected by pipeline, gravimetric cells with flat specimens-witnesses, reagent input unit, stainless buffer tank with its own buffer tank lid, in which tubes for gas supply for purging, centrifugal pump, and an indicator of corrosion rate is connected to the electrochemical cells with electrodes, which distinguishes I that contains a control unit to which the centrifugal pump is connected, and also contains a flow meter and a cell with a catalyst and means of hydrogen peroxide in series connected to the centrifugal pump through the pipeline, the cell with the catalyst is connected further along the pipeline to electrochemical cells with electrodes, and the buffer stainless tank contains a heating element, which is connected like a flow meter to the control unit, with the lid of the buffer tank being built in level switches that are also connected to the control unit. 2. Installation of the catalytic oxidation of the membranes of microorganisms in the process of producing biotensides in the oil production system according to claim 1, characterized in that the cell catalyst is made in the form of a grid.

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