WO2021104544A1

WO2021104544A1 - Compact flotation device for water treatment - ecoflocs

Info

Publication number: WO2021104544A1
Application number: PCT/CO2020/000016
Authority: WO
Inventors: Flaminio GUARIN ARENAS; Carolina Rodríguez Walteros; Cesar Augusto GARCÍA CHINCHILLA
Original assignee: Ecopetrol S.A.
Priority date: 2019-11-28
Filing date: 2020-11-28
Publication date: 2021-06-03
Also published as: CO2019013468A1

Abstract

The equipment corresponds to a vessel operating at atmospheric pressure, designed to remove oil and solids in suspension by means of microbubbles (80 microns in diameter) of air injected by nozzles, with an estimated efficiency of 90% in the removal of fats and/or oils, and of 70% in that of suspended solids, in order that the effluent from the system may thus continue its normal course in the process of the final disposal of the treated water. The equipment for the operation thereof has a bubble generation system comprised of a network of nozzles distributed in such a way that they cover the entire transversal area of the vessel and thus ensure the flotation of the suspended solids and oil entering via the inlet stream.

Description

COMPACT FLOTATION DEVICE FOR WATER TREATMENT -

ECOFLOCS

TECHNOLOGY SECTOR

This invention is related to a compact equipment for flotation of fats and oils used in the treatment of oily waters from oil facilities on land or open sea (Onshore / Offshore) or other industries. The equipment will be present in the processes where the need to treat water is generated or where the installed systems are not enough to carry out said treatment; or in the event of an emergency and the water treatment equipment already installed does not operate.

STATE OF THE ART

Flotation technology is based on increasing the density difference of the treated fluids for their segregation. This is accomplished by air or gas that is used to generate bubbles that enter the system and adhere to oil droplets, suspended solids and other contaminants, generating the difference in densities and separation. Bubbles can be generated under the principles of air / dissolved gas or air / induced gas. Induced Air / Gas Flotation (IAF / IGF): The liquid to be treated is forced to pass through a stream of air / gas bubbles generated mechanically or hydraulically, generating high turbulence in the system. The size of the bubbles varies approximately between 100 - 1000 microns. Air / Dissolved Gas Flotation (DAF / DGF):

A percentage of the effluent from the flotation tank is recirculated to an external saturation tank where air / gas is dissolved under pressure, to later be mixed with the water to be treated that goes to the flotation tank. The function of the recycle water is to transport the pressurized air to the flotation unit. Once inside the unit, the air / gas pressure is released producing a dispersion of fine air bubbles of sizes between 10-100 microns.

The technological principle of flotation emerged at the beginning of the 20th century as a solution to the treatment of wastewater, resulting in the development of the first systems of Separation by flotation with dissolved air in open ponds. Later, in the early 1930s, the first induced air flotation systems emerged, at the same time that dissolved air flotation systems began to use single or multi-stage tanks for the paper, mining and food industries. In the 1960s, induced gas flotation systems were developed for the Petroleum and Petrochemical industries, using the first multi-stage pressurized tanks. In 1965 Wemco introduced the concept of self-induced gas flotation. In 1969 the Wemco company in association with Chevron Texaco adopted the first Induced gas technique for the secondary treatment of production waters in the oil industry, since then different companies worldwide have been improving and creating new technological developments in search of optimizing flotation systems. In the case of the oil industry, the efficiency of the flotation process depends on the difference in density of the liquids, the pollutants to be removed, the size of the oil droplets and the temperature. Currently commercial flotation systems can achieve efficiencies greater than 95% in the removal of Fats / Oils and Total Suspended Solids (TSS).

According to the Water Standard and Produced Water Society (2014), the global distribution of units installed for water treatment in EOR projects indicates that 15% of projects globally use Induced Gas Flotation (IGF) units, around 7% use other types of flotation units and around 3% use Compact Flotation units (CFU). The remaining 75% corresponds mainly to hydrocyclones, walnut shell filters, and other filtration systems. This information shows that this technology has been widely applied in the world as a product developed in its final form with a market share of 25%. Currently, according to needs, new models and products based on the same principle continue to be developed and tested to evaluate their efficiency and commercial feasibility.

The following document generally discloses a technology of a compact dissolved air flotation system for water treatment by multiple flotation tanks.

Patent KR1956379B1 refers to a dissolved air flotation system with multiple flotation tanks. The simple flocculation process is employed and the air flotation tank is included in multiple stages, in this way, 20% or more of the existing area of the dissolved air flotation system is reduced, which is a flotation system. Dissolved air multiple flotation equipped with multiple flotation tanks, which minimizes the rate of energy consumption by using a system hand mix flocculation tank. It is a dissolved air flotation system (dissolved air flotation, DAF) that mixes the water and the coagulant where it includes the agglomeration section, a separation unit and a circulating water supply line. In the agglomeration section the floc is formed; in the separation unit the microbubble flows through a nozzle fitted at the bottom; which adheres to the floc. The air dissolves in the separation unit, which includes multiple dissolved air flotation tanks where the microbubble flows to the front surface, and on the rear side of the flotation tank by dissolved air, atmospheric air flows into the pump shear; the air flow meter and the valve to control said flow are Installed in the inlet pipe by passing the atmospheric air.

DETAILED DESCRIPTION OF THE DRAWINGS. Figure 1. Ecoflocs equipment isometry.

Figure 2. Isometry internal nozzle system.

Figure 3. Typical nozzle for microbubble production. Figure 4. Channels for the supernatant streams. Figure 5. Water recirculation system diagram.

GENERAL DESCRIPTION OF THE INVENTION

This invention is related to a compact equipment for flotation of fats and oils used in the treatment of oily waters from oil facilities on land or open sea (Onshore / Offshore) or other industries. This is accomplished by air or gas that is used to generate bubbles that enter the system and adhere to oil droplets, suspended solids and other contaminants, generating the difference in densities and separation. Bubbles can be generated under the principles of air / dissolved gas or air / induced gas. In the case of the oil industry, the efficiency of the flotation process depends on the difference in density of the liquids, the pollutants to be removed, the size of the oil droplets and the temperature. Currently commercial flotation systems can achieve efficiencies greater than 95% in the removal of Fats / Oils and Total Suspended Solids (TSS). For this reason, the ECOFLOCS system which operates through the IAF / IGF principle. It was designed as a portable equipment for the treatment of production water which corresponds to an intermediate stage of treatment focused on the removal of suspended solids and fats, in order to cover the need to treat water in oil fields or other industries.

The team will be present in the processes where the need to treat water is generated and it had not been detected in the initial scheme of the process; or where the installed systems are not sufficient to carry out said treatment; or in the event of an emergency and the water treatment equipment already installed does not operate. In these cases where an immediate solution is necessary, ECOFLOCS technology with easy transportation through national roads and easy access to oil fields or other industries will cover the aforementioned shortcomings of the process. DETAILED DESCRIPTION OF THE INVENTION

The ECOFLOCS system is a portable equipment designed according to the national transport regulations of resolution 4100 of 2004; this in order to guarantee its adequate displacement to the required locations. This equipment is implemented in the production water treatment process focused on the removal of suspended solids and fats. It operates in a similar way to other air or gas induction flotation equipment widely used in the industry where a physicochemical treatment is carried out.

The conventional chemical process, is given by the addition of chemicals such as coagulants and flocculants, the coagulant acts on the colloids in suspension which are destabilized and as a consequence attracted to each other forming groups of particles, which later the flocculant agglomerates increasing their size to having buoyancy characteristics. However, with ECOFLOCS, buoyancy is induced by the presence of bubbles that have been generated with a low energy requirement and that are appropriately distributed within the treatment tank. This induced flotation reduces the cost of using chemical additives.

Then there is a physical process in which the flocs formed in the water are removed thanks to the guaranteed laminar flow in the flotation cell, the hydraulic conditions of the unit guarantee that an ascent speed is maintained, so that they are collected in the part top of the unit. ECOFLOCS presents advantages: low investment cost valves, low maintenance costs, low energy consumption, high removal efficiency of fats and suspended solids and easy transportation. Two advantages stand out: 1) portability and 2) nominal processing capacity (10K of 10,000 BWPD and 20K of 20,000 BWPD sizes)

ECOFLOCS technology is a portable equipment that aims to separate suspended solids, grease and oil, it constitutes a useful instrument to face the challenge in processes of integral treatment of production water, managing to be applied in oil, gas and oil production fields. other industries through proper operation of the equipment under optimal operating conditions, thus meeting the expectations and demands demanded by the industry.

The following table presents the specifications that the production water must meet. These quality parameters were established in the conceptual engineering of the ECOFLOCS system design.

Next, it is possible to observe the characterization of the production water stream to be treated in the ECOFLOCS compact flotation equipment.

It is of vital importance to characterize the natural gas or mantle gas that will be used in the ECOFLOCS equipment in order to prevent the oxygenation of water when it is required in the treatment process (for example, for water injection or reinjection processes). Some of the properties to consider are presented below (Table 3).

The ECOFLOCS equipment corresponds to a tank that works at atmospheric pressure, designed to remove oil and suspended solids by means of microbubbles (80 microns in diameter) of induced air with nozzles, with an estimated efficiency of 90% for fat removal and / or oils and 70% of the amount of suspended solids so that the effluents from the system can continue their normal course within the final disposal process of the treated streams. The equipment for its optimal operation has a bubble generation system, composed of a network of nozzles that are distributed in such a way that they cover the entire cross-sectional area of the tank and in this way the flotation of suspended solids and the oil that comes in the input stream and consists of the following elements (They are related to figure 1):

The operating philosophy of the ECOFLOCS system is the integral treatment of the supernatant currents coming from the flotation cells of corrugated plate separator systems (known as CPI) or from water segregation systems in which crude oil is removed from massive form and sedimentary solids, this is performed by circulating a stream of water through the nozzle system. In this system, thanks to the Venturi effect, it creates a vacuum which sucks gas, and is mixed with the recirculated water stream, generating finely distributed bubbles in the water stream, which favor the flotation of crude oil and suspended solids. The recirculation of the water is carried out by taking part of the effluent between 25% and 30% of the inlet flow, without pressurizing, in the contact zone, just before the float inlet. The effective separation of liquids and solids from the waste, as well as the concentrations of the separated solids, depends on the sufficient generation of air microbubbles per unit of solids and on the normal distribution of the bubble size with a smaller size (P10) of 80 microns (μm).

It is important to highlight that the ECOFLOCS tank presents the following design considerations:

• A fixed height corresponding to the height required for the installation of the tank internals (suction nozzles, inlet water distributor recirculation lines and gas or air distribution network).

• Effective height that corresponds to the height required for the flotation process.

• Total height that corresponds to the diameter of the tank.

• The ECOFLOCS tank design meets the standards under section 8 of the ASME code for low pressure oil industry tanks.

The generation of the design of the internals system for the water inlet distribution for the ECOFLOCS tank, was based on the design principle of pipe heads, which consists of the relationship of areas through which the fluid moves through the internal lines. of the tank. The standard recommends that the area of the tank fluid inlet lines should be less than or equal to the sum of the areas of the distribution tubes.

The ECOFCLOS tank internals system consists of 2 arms for the inlet water and 2 arms for the recirculation of water together with the injection of air and / or gas to generate the bubbles at a maximum maximum linear velocity through the orifices of flow of 3 ft / s.

The generation of bubbles has 2 symmetrically distributed arms, which are located at a lower level than the arms supplying the water to the tank, the main objective of this distributor is through the recirculated water and through the use of the nozzles to generate Microbubbles, which by means of the bouyanza effect help to separate solid particles and oil from the water stream to be treated, were determined with 6 nozzles each with an air or gas injection requirement of 7.31 ft3 / h, 1/2 ”or 3/4” diameter nozzles with a pressure variation of 15 Psig and a flow rate of 3,645 gal / min that meets the suction requirements. Since the nozzles operate by Venturi effect, a sufficient pressure differential must be guaranteed to allow them to generate the appropriate vacuum for the gas to be incorporated into the water stream and finely dispersed bubbles to be produced that facilitate the flotation effect. The injector nozzles work under the principle of the Venturi effect, which consists of a decrease in pressure and an increase in the speed that a fluid experiences when passing through an area of less suction within a closed duct.

The difference in pressure generated by the passage of fluid allows the suction of a second stream at the point with the smallest cross-sectional area, allowing the streams to mix.

For the design of the ECOFLOCS water treatment system, differential pressure Venturi injectors with internal mixing fins from the Mazzei manufacturer were used, which have demonstrated high efficiency in the industry and which for the current design consists of the following elements ( are listed in figure 2):

Through the calculations carried out, it is concluded that the pumps to be used must be sized for maximum operating pressures of 50 Psig for recirculation and 100 Psig because the pumps to be used are low pressure, design and operating conditions for the tank sizing (Table 6).

The manhole is an accessory that serves for the entry of personnel to carry out inspection, maintenance among other activities, for this accessory a diameter of

24 'operation two pumping systems, the first of them to recirculate 20% of the working flow, and the second to bring the treated water to the filter heads as shown in figure 3 of a typical nozzle for the production of microbubbles where (1) the entry of the water occurs, (2) the suction of the air and (3) the exit of the mixture of water and the sucked air for the generation of the bubbling.

The ECOFLOCS compact flotation system requires for its operation a pumping system made up of two identical centrifugal pumps for the recirculation water for the generation of microbubbles that help in the separation of solid particles and oil from the desired water stream. try.

On the other hand, a pumping system made up of two identical centrifugal pumps is necessary for continuous operation, which will be in charge of bringing the treated water stream directly to the filter heads or, if necessary, to discharge. It is important to highlight that within the scheme of the correct operation of ECOFLOCS, the system may be subject to different flow demands. For this reason, it is important to estimate a reliable operating zone for the pumps, thus recommending bringing up to 10% above its maximum efficiency point (BEP) and highlighting that taking the pump beyond this value would cause its operation to be unsuitable for system requirements, thus causing cavitation and vibrations as well as high energy consumption.

Another limitation to take into account is the minimum continuous flow since working below this manufacturing factor could cause recirculation of the fluid pumped into the pump which causes heating in the fluid that can lead to a state of cavitation and high vibrations. The following figure shows the outlet pump, it is designed under the specifications given during the process for the outlet of the treated water in the ECOFLOCS compact flotation equipment. The ECOFLOCS control system has instrumentation and equipment that measures and / or controls the following variables:

- Level - Pressure - Flow

- Velocity In the measurement of the level variable, a package type equipment was proposed in the design that is composed of a float type visual level meter, a guided wave meter and 2 magnetic type switches for high high and low low level alarm.

In the pressure variable, a gauge pressure meter is proposed in the design to be installed in the tank and in the recirculation and outlet suction and discharge pipes.

For the measurement of the flow variable, a magnetic type meter is presented to be installed in the branch of the recirculation line and for the control of this variable, control valves with an electric actuator are proposed, located in the same pipe lines as the meters. FIT.

The speed control is done in the motors of the output pumps through the variable frequency drives. After performing the verification, instrumentation adjustments, connection and status of the manual valves, the protocol for the commissioning of the ECOFLOCS compact flotation system is started.

System startup should be started by filling the tank until it reaches the normal operating level for the ECOFLOCS system. Upon reaching the operating level, the system automatically sends the start command to one of the drives so that it turns on the pump assigned to the drive that has received the start command and starts the water outlet from the tank and, in parallel, the recirculation pumps start. to allow the passage of water and start with the production of microbubbles to carry out the solids separation process.

It is important to bear in mind that by guaranteeing the level control in the operation of the tank, the correct skimming of traces of oil and floating solids is ensured. The tank will present low alarms and high level alarms.

Recirculation will work as follows; the control of the opening and closing of the control valves will be given by two internal variables (La and Lb) generated from the result of the programmed equations where the input data is supplied by the flow meters.

The total value of the recirculation flow will be a variable created as F _total that will be the sum of the value sensed by the 2 flow meters.

To establish the operating values and guarantee the correct operation of the system, operating routines must be established based on the data previously established, additionally the routines must guarantee continuous supervision of the measuring equipment. and control, to power equipment such as pumps and variators, and to the variables of the process. These routines must be established and adjusted according to the operation scheme of the field or the Industry where ECOFLOCS is operating.

Both the control cabinet and the power cabinet have the option to change the state from automatic to manual. This operating mode applies to the following cases:

Maintenance

Specific tests on equipment Specific tests on pipe lines Emergency stop

RECIRCULATION PUMP SIZING

A 5 [hp] motor is required to drive the recirculation pump.

OUTLET PUMP SIZING A 30 [hp] motor is required to drive the pump.

CHUTES FOR SKIMMING THE EQUIPMENT

To collect the supernatant currents resulting from the ECOFLOCS process, two gutters are built, which are located at the surface level of the liquid inside the tank, these gutters are connected between them by their ends to a hydraulic seal that fulfills the function of preventing the escape of air to the outside. a 2 [in] pipe to make the connections of the channels with the outside, and these are connected in turn with a nozzle located on the tank cover see (figure 5) channels for the supernatant streams.

TANK LEVEL CONTROL NARRATIVE LOGIC

The ECOFLOCS tank has a level indicator transmitter in charge of transmitting the signal that indicates the level of the tank and depending on the value delivered by this instrument, 3 different situations can be generated:

First Situation: the tank level is at the normal operating level. The controller will send a signal to the frequency inverter that is in operation and will give the order to conserve the speed of the motor of the level pump that is in operation.

Second Situation: the tank level increases until the high level alarm is turned on, the alarm is generated by the high-high level switch who is in charge of sending the signal to the controller and this will send a signal to the frequency inverter that is out. operation to turn on the pump that is turned off and thus put into operation of both pumps and increase the speed of the motor of both pumps until the normal operating level of the tank is re-established. When the tank level is reestablished, a pump will turn off and the system will continue normal operation. Third Situation: the tank level decreases until the low level alarm is turned on, the alarm is generated by the low-low level switch, this is in charge of sending the signal to the controller and in turn this will send a signal to the frequency inverter that running to slow down the pump motor in operation. And allow a slow drain to re-establish the normal operating level of the tank.

The tank has 2 level switches, one that will send an alarm signal for a high-high level and another that will send an alarm signal for a low-low level.These Switches are used for tank safety in such a way that when detecting a change of state will send an alarm signal to the controller and depending on the switch that detects the change of state, the controller will send a signal to the frequency inverter that is in operation and will increase or decrease the speed of the pumps.

A pressure transmitter located in the suction line of the level pumps in case of a low pressure level which refers to a low flow level, the controller will automatically send a signal to the frequency inverter that is in operation that will give the order to shut down the motor of the pump that is operating and protect its integrity. At the same time in the discharge line of the level pumps after the ON / OFF valve there is a pressure transmitter that will be in charge of alerting the controller in the event of an overpressure in the line, this will send the order to the frequency inverter that is in operation to turn off the motor of the level pump that is in operation to avoid damage to the level pumps, the signal will be sent to the on / off valve in the fault state off or normally closed to When the above-mentioned overpressure occurs and the pump still has a pressure head due to the tank pressure, it de-energizes and generates a shutdown and protection of the integrity of the level pumps.

NARRATIVE LOGIC OF RECIRCULATION WATER CONTROL

Two transmitters Pressure indicators two transmitters Flow indicators two control valves.

In the suction line of the recirculation pumps there is the pressure transmitter that when detecting a drop in pressure lower than that required for operation, the controller will automatically turn off the recirculation pump that is operating in the discharge line of the pumps. recirculation is a second transmitter pressure that upon detecting a pressure greater than that required for operation, the controller will turn off the recirculation pump that is in operation.

The recirculation discharge line is divided into 2 sections that allow the recirculation water to enter two distributors located inside the tank, for this reason each line has a control valve and a flow indicator transmitter that allows reading of the amount of flow that passes through each of the lines.

To make the sections have the same flow distribution, the total value of the flow in the main recirculation line must be known, seeking to ensure a correct flow distribution percentage of opening or closing of the control valves set by a value of 0.5 where according to the The result of the variable takes the valve to a percentage of opening or closing and thus guaranteeing that the same amount of flow is regulated for the sections

MANTO GAS CONTROL NARRATIVE LOGIC

From the tank configuration: since the tank can be configured to take production gas or another type of gas or it can be configured to function as an atmospheric tank. It is made up of a pressure indicator transmitter, a vacuum pressure valve that is set to a vacuum pressure and an overpressure that guarantees the safety of the tank to relieve pressure, and a valve that supports the pressure and vacuum valve if necessary. failure of the overpressure set.

To maintain adequate pressure in the gas chamber of the tank, it has a facility known as a "gooseneck" that allows air to be taken from the environment.

High and low pressure safety element there is one (1) safety element.

The vacuum pressure valve, set at two different pressures; One of the sets is to relieve pressure, this values set at a pressure normally higher than the working pressure in normal tank conditions, in such a way that when the pressure increases only 10% of the adjusted control value, the valve will open and will send the excess air into the atmosphere; the second set is to take in air in case the tank is empty, the valve will open allowing the entry of air from the atmosphere until the internal pressure of the tank is adequate. A second element known as a rupture disk that supports the PW in the event of failure

CONTROL SYSTEM

The control scheme for the ECOFLOCS portable equipment is proposed in an 'open' architecture with inherent capacity to integrate and exchange information with other devices and platforms using standardized or standard communication protocols and means. The system is capable of acquiring data, monitoring and controlling the process with the functions programmed from the equipment platform and allowing the monitoring of control from a centralized control room. EXAMPLES.

Example 1. To calculate the dimensions and the best design configurations of the equipment, the following simulations were carried out for a nominal load of up to 10,000 BPD and 20,000 BPPD.

For the calculation of the diameters and lengths of the water distribution system, the theory of relation of the areas was applied, thus determining the number of holes for each arm. Through the use of specialized software, the fluid simulation was performed, obtaining the discharge flow through each of the selected orifices, thus ensuring that it resembles plug flow.

Said diameter is determined through trial and error using specialized software in hydraulics (Pipephase), thus obtaining the diameter of the orifices and the distance at which they must be from each other to ensure flow through the entire distributor arm, by means of Hydraulic analysis results in a maximum of 18 nodes, with two holes each, which meet the speed limitation of less than 3 ft / s.

Table 7 and 8 show the results obtained in the simulation for the nominal capacity of up to 10,000 and 20,000 BPD.

Table 9 and 10 show the spacing between nodes according to the results of the simulations carried out.

Once the number of holes required was determined with the hydraulic calculations, the inlet and outlet pressure of the system required for the hydraulic analysis of the system was determined. At all times, the maximum speed limitation of less than 3 ft / s must be met. In table 11 and 12 are the pressures calculated by means of the simulation for the inlet and outlet in the tank for a flow of 10 and 20 KBWPD.

RECIRCULATION SIMULATION

The generation of bubbles has 2 symmetrically distributed arms, which are located at a lower level than the arms supplying the water to the tank, the main objective of this distributor is to generate recirculated water through the use of the nozzles. microbubbles which, through the bouyanza effect, help to separate solid particles and oil from the water stream to be treated.

In determining the types of nozzles that generate the bubbles, the table recommended by the manufacturer is used, which takes into account the amount of air and / or gas to be used in the process, the recirculation flow rate and the pressure delta. .

For the operating conditions of the ECOFLOCS tank with a nominal capacity of 10,000 BWPD, 16 nozzles were determined each with an injection air or gas requirement of 7.31 ft3 / h and a nominal capacity of 20,000 BWPD, 16 nozzles each with a 14,621 ft3 / hr injection gas or air requirement

The calculations carried out to determine the type of nozzle to be used in the ECOFLOCS system were made by means of a simulation in the specialized software in hydraulics HYSYS, resulting in the pressure delta, pipe diameters, required pump and the flow rate of air for each nozzle.

Table 17 and 18 show the diameters and lengths determined for the recirculation pipe and in figure 5 the distribution of these is found, the tank (1) which is the portable tank and (2) the recirculation pump in charge of generate the recirculation of fluid towards the nozzles so that the bubbling is generated in the tank.

Once these calculations have been determined, the values are located in the design table provided by the manufacturer Mazzei and it is established which meets the process requirements. The nozzles that meet the conditions stipulated in the process are the Model 584 1/2 "or 3/4" (Inch) diameter nozzles with a pressure delta of 15 Psig and a flow rate of 3,645 gal / min. suction required by the 7.3 ft3 / hr process for the 10,000BWPD tank. The nozzle that meets the conditions stipulated in the process is the Model 684 3/4 "(Inches) diameter nozzle with a pressure delta of 20 Psig and flow rate of 7.29 gal / min. It meets the suction requirements that the process needs. 14,621 ft3 / hr for the 20,000BWPD tank.

Claims

1. A compact flotation device for water treatment characterized in that it comprises the following parts: a. A tank that works at atmospheric pressure, designed to remove oil and suspended solids by means of microbubbles (80 microns in diameter) of induced air with nozzles, with an estimated efficiency of 90% for removal of fats and / or oils and 70% of the amount of suspended solids so that the system effluents can continue their normal course within the final disposal process of the treated streams. b. A system for generating bubbles, composed of a network of nozzles that are distributed in such a way that they cover the entire cross-sectional area of the tank and in this way the floating of suspended solids and the oil that comes in the inlet stream and that It consists of the following elements. c. An internal system consisting of 2 arms for the inlet water and 2 arms for the recirculation of water together with the injection of air and / or gas to generate the bubbles at a maximum maximum linear velocity through the flow holes of 3 ft / s. d. Some gutters, located at the surface level of the liquid inside the tank, these gutters are connected between them at their ends to a hydraulic seal that fulfills the function of preventing the escape of air to the outside. and. A pipe to make the connections of the gutters with the outside, and these are connected in turn with a nozzle located on the tank cover see (figure 5) gutters for the supernatant streams. F. A control system for an “open” architecture with inherent capacity to integrate and exchange information with other devices and platforms using standard or standard communication protocols and means. The system is capable of acquiring data, monitoring and controlling the process with the functions programmed from the equipment platform and allowing the monitoring of control from a centralized control room.