ES2217602T3 - MULTIFUNCTION PROCEDURE AND EQUIPMENT TO MAINTAIN METASTABLE FLUIDS - Google Patents

Abstract

The invention concerns a method for maintaining metastable liquids contained in tanks, both for curative action on layers of sediments already formed and for preventive use for eliminating cause and effects. The invention is characterised in that the metastable product contained in a tank is sucked at a predetermined level of the volume of said product liquid phase, using a suction tube (1) connected to a pump (6) suction (01), and immediately re-injected under pressure into said volume of product contained in said tank using the same pump and injection nozzles (7) connected to the pump discharge (02) via an injection tube (2) arranged, preferably concentric, in said suction tube (1).

Description

Multifunction procedure and equipment for Maintain metastable fluids.

The present invention relates to a procedure and a multi-function equipment for maintenance of metastable liquids, where the action of this procedure and this equipment can be corrective (elimination of sediment layers already formed) or preventive (prevent formation of said layers).

It says "metastable" to a property characteristic of certain liquid phases whose stability Physical-chemical is subject to modifications. Example: segregation or sedimentation due to gravity and / or at the temperature.

Field of application of the invention

The stored metastable liquids and their sediments have physical-chemical characteristics individuals, with segregation effects hardly avoidable

It is known that the heaviest elements that they contain are deposited little by little, in the course of their exploitation, accumulating at the bottom and sometimes on the walls of the deposits

This physical-chemical phenomenon and its consequences for the smooth running of farms industrial is currently always the source of costs, losses, direct or induced, and sometimes also of material damages Human and ecological.

These sedimentations depend on various factors in regard to its abundance or its composition. It can be cited for example:

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The nature of the stored product and, more particularly, the molecular weight differences of its various components.

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The climatic conditions and temperature variations.

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The frequency of filling and emptying movements in the tank considered in the course of your period of service.

The aforementioned indications are not in any Limiting mode

Once the sedimentation process has begun, in a principle as a simple thickening of the lower layers of the stored liquid, it will accentuate over time; the sediment that forms becomes increasingly compact, including in certain cases molecular bonds that form strata. It damages the exploitation of the deposit and its contents, and reduces the capacity available.

Application Examples

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Storage in warehouses of compound chemicals, hydrocarbons, derivatives Petrochemicals and liquid raw materials.

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Raft storage or industrial waste lagoons awaiting treatment.

Special operations are also considered in reason for dimensions or environment: corrective operations become indispensable due to the accumulation under threat of stop of the exploitation, referred for example to the large deposits that are part of the drilling rigs and of oil extraction in the open sea, and also in storage underground and in storage on board tankers abandoned, as well as in the countless gaps that contain waste, practiced pending technical, ecological solutions and economic

Object of the invention

The present invention is intended to provide remedies. to the segregation or homogeneity problems raised, during its storage in tanks, by certain liquid phases that contain elements of weights or molecular natures different.

These sediments have consistencies that go from that of a soft mud to that of a compact mass that evolves, in the long term, towards its solidification.

These sediments have been considered during decades consequences, annoying but more or less inevitable, of Industrial processes in their origin.

Only recently has it been evaluated and had in consideration of its harmful nature for the environment, for the public health and, above all, for the people who work in its extraction.

Its evolution in general has been planned only since recent dates, and poses a permanent problem. With much frequency was simpler, and especially less expensive, pouring, abandon and even bury this annoying waste after extracted, before inevitably undergoing treatments expensive.

Its possible reuse or revaluation has been considered for a long time secondary due, on the one hand, at the lowest cost of the raw materials that generated them and, on the other part, to a lack of ecological awareness derived from the economic imperatives of an industry dominated by results Financial At present the latter is very aware of the importance of environmental conservation, a motivation to which add the rising costs of the treatments of the waste and raw materials, which has put an end to the illusion of savings that, in the long term, have been demonstrated deceptive

Atmospheric waste caused by extraction operations of these sediments, carried out in forced ventilation conditions (for the protection of people employed in manual or semi-manual tasks in a medium insane and even dangerous), they are certainly invisible in their greatest part, but nevertheless suppose considerable volumes at scale global that are issued without control or treatment and that up to dates Recent have not been evaluated or taken into account.

Most of these deposit extractions sedimented are still done manually throughout the world. They are insane, and sometimes dangerous, for both workers As for the environment.

An object of the invention is to make available of the industry a relatively simple means in its application and, after all, less expensive from all points of view that a useless dilapidation of raw materials that have become economically valuable, while preserving the health of the people and their natural legacy.

Moreover, the invention is intended to use a multifunction equipment that presents the following operating characteristics:

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May be used in the various types proposed for both an action corrective in sediment layers already formed as for a preventive implementation, eliminating both the cause and its effects, where the same equipment can also be used to guarantee final decontamination of capacities treated.

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May assemble quickly and almost autonomously for interventions on time or be fixedly installed and put in operation according to intervals and frequencies defined by the operating entity

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Avoid modifications to the existing tank or its pipes.

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It allows the continuity of the operation of the deposit during operations preventive or corrective employment, without significant interruption from service.

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It uses its own system energy, or available on site ; and with quick assembly and implementation.

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May be used in liquids of different natures, complying with In any case, the security obligations for the products subject to  special regulations due to its characteristics, its corrosivity, its emanations or its toxicity.

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Guarantees optimal security conditions in deposits containing flammable products or gases.

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Guarantees maximum environmental protection, excluding all waste atmospheric or terrestrial caused by its implementation.

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It dispenses the workmanship of all contact with sediment and liquid from which one proceeds or with its emanations.

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It allows (yes the nature of the product and the composition of the sediment do possible or desirable) reuse of components usable sediment, homogenized and clean for a reassessment.

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Avoid the operating entity, in case of preventive use of the invention, expensive maintenance operations corrective.

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In case of preventive employment has a moderate operating cost, comparable to the usual in industrial facilities.

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It is modular in regards to its basic functions: flow rates, pressure, rotation, etc.

State of the art

Some sediments, because of their inert nature and because of the technique used, as well as its consistency, have been the subject long time of well-known treatments (injection of pressurized liquid, compressed air, stirring, etc.) to facilitate its extraction. These treatments do not fall within the framework. provided of the applications of the invention.

To remedy the inconvenience caused by the storage of liquid phases that have caused sediments physically-chemically not inert, the entity operator proceeds, according to their own needs or attending to contractual or regulatory technical obligations, to the extraction of these sediments whose consistency limits in general effective pumping or transfers.

For this extraction they are used or proposed various means or procedures, which in general are specific to the stored and sediment product that it has formed, which in certain cases may be reusable or subject to reassessment.

Very often, these media are manual or semi-manual Some sediments make the work of the employed people be pitiful, insane or dangerous, and these procedures do not always guarantee for sediments removed an evolution that protects the environment and may require costly complementary treatments (exteriorization, transport, incineration, centrifugation, ...).

The hydrodynamic procedures used currently for the corrective treatment of certain sediments (these are "corrective" procedures) present the following drawbacks: they are involved in sediments already formed and more or less stabilized and require stopping or slowing down important in the exploitation of capacities or deposits, transfers and use of often heavy material, to everything which must be added the assembly and disassembly operations of pipes, pipes and cables, which is a delay relatively long with a high cost.

These high costs and these wasted time limit the use of such procedures to corrective operations that have become indispensable. Because of its costs and what complicated implementation, these procedures could not constitute a solution that allows not to provide a remedy to inconvenience of existing sedimentation but prevent its training, the only solution that makes it possible to eliminate the inconvenience and the losses caused by this phenomenon.

The current procedures and their equipment are "rigid" in its use. You can't think of using them to achieve the best valid objective pursued in the matter: prevent these sedimented deposits from forming, both by exploitation reasons as for economic reasons.

In US 4,426,233 are described, by example, a procedure and an evacuation facility for sludges from an oil storage tank, according to which oil is extracted in liquid phase from the base of the tank, by means of horizontal conduits connected to the holes of product extraction arranged on the side wall of said tank, and then re-injected under pressure by means of a pumping machine and liquid projection devices suspended on the roof of the tank, in order to disintegrate and dissolve the mud layer.

Description of the invention

The process of the invention is relevant. particularly in that:

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in the product metastable contained in a deposit are introduced vertically a suction tube and a housed injection tube, preferably concentrically, in said suction tube;

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the metastable product at a certain level of phase volume liquid of said product, by means of the suction tube connected to the suction of a pump, and

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it is reinjected immediately pressurized the liquid product aspirated into the mentioned volume of product contained in said deposit, by middle of this pump and the injection nozzles connected to the discharge of the latter by means of said tube of injection.

According to another characteristic provision of this procedure, the suction and injection tubes are introduced vertically in the metastable product to be treated.

The autonomous module according to the invention is relevant in the fact that it comprises at least one module that includes two concentric tubes, that is, a first section tube major (outer tube) that contains at the bottom at least one and, preferably, several suction ports and whose part upper is connected to the suction hole of a pump, and a second duct (inner duct) whose upper part is connected to the discharge port of the mentioned pump and whose lower end is connected to injection nozzles, with Rotating preference

According to another characteristic provision of this equipment, each module is provided with means that allow its vertical placement in a container or reservoir containing the metastable product to be treated.

According to another characteristic provision, the one or more suction ports of which the tube is provided aspiration are placed on top and away from the end bottom of the module that includes the lower end of the tube injection.

Advantages of the invention

The procedure and equipment according to the invention respond to the different objectives before mentioned.

Moreover, the invention proposes to comply these objectives through the use of autonomous modules whose particularity is to carry out in a single device the functions of aspiration of the liquid contained in the tank and its discharge to pressure on it, inside which they will be oriented and they will distribute the flows in the whole volume contained in the deposit, with the flows adapted to the purposes according to the nature of the operation: suspension, application of flow, liquefaction-pumpability, homogenization, washing, decontamination.

In addition, the feature "of functions multiple "of the claimed equipment allows to have in a same apparatus of both an attack power indispensable for the dispersion in the volume content of sedimentations more compact and / or more binders as a successive agitation indispensable complement of this same volume to achieve its homogenization, if this were the objective sought.

The module according to the invention is of functions multiple given that it allows, if they are planned before mounting the specific adaptations for operation, distribute the convenient flow, either in specific corrective operations or in preventive implementation. This is an advantage. considerable, both for the service in charge of jobs within of an industrial installation as for a commissioned contractor by the industrialist.

The energy needed for the functions of modules (suction, pressure, discharge, rotations) can be guaranteed either by means of a hydraulic group or by a group pneumatically or electrically. Without excluding the latter possibilities, the following will describe the set of a hydraulic pressure driven equipment according to an example of preferred implementation. This will avoid problems and standardized restrictions that are linked to the employment of the electricity in certain facilities or certain sensitive liquids, as well as those that could cause the use of compressed air.

Each module is autonomous in the sense that can be mounted directly on the available hole (s), in the roof or the side wall of the tanks, by means of a baseboard or a cover adapted to the dimensions of these. The number of modules and their dimensions depend at the same time on the liquid and of the sediment to be treated and the geometry of the deposit in yes. No other assembly is necessary, apart from the pipe hydraulic power and its connection to the groups or centrals hydraulic well located on the ground, outside the tanks, or either in any other location chosen depending on the place, that will be needed later.

Brief description of the drawings

The objectives, characteristics and advantages precedents, and some others, will be better understood from the description that follows and of the attached drawings, in which:

Figure 1 is a front view, in axial section and schematic, of a suction and injection module according to the invention.

Figure 2 is a view analogous to Figure 1 which shows an execution variant of a suction module and injection according to the invention.

Figure 3 is a front and type view schematic illustrating a second variant embodiment of a suction and injection module according to the invention.

Figure 4 is a perspective and type view schematic showing an example of implementation of the procedure and equipment according to the invention in a tank large floating roof.

Figure 5 is a perspective and type view schematic illustrating an example implementation of this procedure and of this equipment in a fixed roof tank of small dimensions

Figure 6 is a vertical sectional view of schematic type that shows the implementation of the procedure and of the claimed equipment, in a pit (or rafts, or lagoon).

Description of an example implementation of the invention

Reference is made to the accompanying drawings for describe interesting examples, although in no case limiting, of procedural implementations and realizations of multi-function equipment for the maintenance of metastable liquids, according to the invention.

As indicated above, according to the procedure of the invention, the aspiration of the liquid product contained in the tank, its pressure and injection of this flow in the volume contained in the deposit is made at from the same and unique set, which can be placed directly in the existing hole (s) of the deposit considered.

The equipment according to the invention comprises the minus a suction-injection M module and, with preference, several autonomous M modules whose number and dimensions depend, for example, at the same time on the liquid and sediment to be treated and the capacity and geometry of the tank that It contains this liquid and sediment, as indicated previously.

Each module comprises two tubes 1 and 2, arranged coaxially.

Given the fact that, very often and particularly advantageously, these tubes are intended to be used vertically, they will be used hereafter conventionally the terms "inferior" and "superior" to distinguish its ends or opposite extreme parts.

Likewise, it is stressed that the word "deposit" used in subsequent exposure designates both to a vessel of varying dimensions and capacities (for example, up to 130,000 tons or more) covered by a roof fixed or floating as open pit rafts of different types (lagoons, lakes, etc.).

The outer tube 1 or suction tube has a passage or conduit 3 of annular section larger than the section circular duct 4 defined by the inner tube or tube download 2.

The suction tube 1 contains, in its part bottom, at least one and, preferably, several ports or 5 staggered openings, preferably in shape regular, on its side wall. These openings can be advantageously provided with an artichoke (not shown) arranged opposite to the entrance of sediments segregated by the impact of pressurized flows, and that move inside of the volume of the liquid product contained in the tank before be agitated and homogenized.

The suction port (s) 5 of which the suction tube 1 is provided or is placed on top and at a distance from the lower end of the M module, which includes the lower end of the discharge tube or injection tube two.

The set consisting of the two tubes before mentioned is intended to be placed vertically in the tank which contains the product to be treated, so that a part more or less important of its length is submerged in said product.

The length of the suction tube 1 is enough to ensure a regular and constant aspiration for its section or its hole that is submerged in the liquid contained in the deposit and / or through open ports at the height of the Liquid phase chosen.

The length of the discharge tube 2 depends on the nature of the operation to be performed, so that said tube can be interchangeable in its lower sections, telescopic or extensible For example, in the case of a corrective operation, the length of the discharge tube will be determined by the level of the sedimentary layer to be treated already constituted, of its nature and its consistency, in order to penetrate and disaggregate This sedimentary phase.

As shown, for example, figure 3, the tube of suction 1 can be formed by several sections 1a, 1b, ..., assembled by means of threaded joints 1n. The same goes for the discharge pipe 2 and with the shaft 9.

The upper end of the outer tube 1 is connected to the suction hole 01 of a pump 6 whose crankcase or body can be rigidly attached to the top of the set consisting of tubes 1 and 2, so that said pump it can be placed axially or laterally with respect to said set. In front of the suction hole 01 of the pump 6, place a filter 20.

Moreover, the upper end of the tube inside is connected to the discharge port 2 of the pump 6.

Pump 6 will be chosen depending on:

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His construction, compatible with the products to be treated;

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his good power of aspiration; the pump will be self-aspirating;

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your pair effective flow / pressure.

This pump thus guarantees aspiration, setting under pressure (for example, at a pressure of the order of 5 to 25 bar) and the injection of a flow that will be put into permanent circulation throughout the operation, until the set goals: liquefaction, flow application and / or homogenous suspension of sedimented elements.

Following the example illustrated, pump 6 is driven by hydraulic power, where the generator and the Hydraulic power supply are installed in the ground or at any other site chosen based on the industrial installation, outside the warehouse that encloses the product That is going to be treated. The power of this hydraulic energy depends of the number of modules used for the treatment considered and is adapted to the volume and nature of the liquid or the sediment to be treated. Of course, for operation of pump 6 any other type of energy could be used chosen by the operator for reasons of local exploitation.

The lower end of the discharge tube is connected to hydrodynamic injection nozzles 7, with Rotating preference

The rotation drag of these nozzles swivels can be guaranteed by means of a motor or turbine hydraulic 8. However, hydraulic power could be replaced for any other energy, at the operator's choice, without modify at all the principle and procedure of application of the invention

According to the mode of execution represented (figure 1), the motor 8 drags a shaft 9 housed in the discharge tube 2, which crosses from one extreme to another. Tree 9 flows into a rotating crankcase 10 to which it is rigidly attached, of so that the crankcase 10 is, for example, arranged in the extension of the lower end of the suction tube to which is advantageously connected by means of a swivel fitting eleven.

The rotating nozzles 7 are arranged laterally in the crankcase 10, so that the drag in rotation of the latter produces a circular movement of said nozzles around the vertical axis of the module (arrow F1). Rotation of the nozzles 7 around the longitudinal axis of the module are performs at slow speed (for example, on the order of 0.5 to 10 turns / min), depending on the nature of the treated product and of the operational phase in progress, the motor or turbine being connected 8 to the tree by means of a reducer (not shown).

Moreover, the lower end of the tube discharge 2 is provided with a fixed conical pinion 12 coupled to a Conical sprocket 13 in rotation with a satellite pinion adjustable 14, which in turn meshes with a pinion 15. This pinion 15 is footwear at the end of a small conduit 16 oriented perpendicular to the axis of the injection tube 2. This conduit 16 it is mounted by turning on a shield 17 of which it is provided, laterally, the crankcase 10 and the nozzles 7 are mounted on the distal end of this duct, which is located outside said sump. Similarly, the nozzles 7 are mounted so that rotate in planes parallel to the injection tube (arrow F2), at a speed that also depends on the nature of the product treated and of the operational phase in progress, for example to a speed between 0.5 and 10 turns / min. Said of another form, according to the embodiment described above, the nozzles 7 are mounted on the lower end of the module, with possibility of rotation in two perpendicular planes.

The number and flow of the nozzles 7 as well as the level at which they are placed in the tank, it determined according to the nature, volume and viscosity of product to be treated, as well as the technical lessons obtained for the extractions and analyzes indicated before the implementation of the procedure and the system zones planned for intervention.

The minimum length of the radius of action of hydrodynamic jets that start from the nozzles must comply the following rules:

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all areas that they are going to be treated must undergo flow due to the impact of the jet; no area should be excluded from agitation;

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in consecuense, Depending on the hydrodynamic impact radius obtained, multiply the number of modules that will be implemented to large deposits and / or strong viscosities of products to be treated, so that you get a coating of the radii of action between them.

The nozzles are advantageously mounted on the specific threads arranged at the outlet of the conduit 16, so that these threads can receive nozzles of section, geometry and specific orientation. If the number of holes available does not It is fully used, unused can be sealed by of screw caps.

All the fundamental characteristics of module (flow, pressure, rotation, ...) are modular and adjustable according to the observations, studies and analyzes carried out with prior to the treatment operation and, if necessary, in the course of it.

The placement structures of the modules with views to its implementation can be very different depending on the configuration of the deposits that contain the products that They are going to be treated.

For example:

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for the treatment of the products contained in T2 fixed roof tanks, the o M modules (figure 5) can go through arranged openings generally in origin on said roof and be supported by this latest; in this case, the length of the modules adapts to the tank height; in practice, the modules can rely on the fund of deposits, so as to guarantee their rigidity, based either on rotating bases or on small fixed sockets 18 (figure 2) provided with sealed bearings allowing rotation of the rotary nozzle holder 10;

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for the treatment of the products contained in floating roof R tanks T1, the M modules (figure 4) can be mounted similarly, relying on the fund of said deposits; in this case, the dimensions and specifications of tube 2 and, above all, of outer tube 1 are determined to ensure the same compliance with the restrictions that the supports that are provided original floating roofs; these tubes are thus capable of hold these floating roofs once the deposit has been emptying of its content;

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for the treatment of the products contained in open pit B rafts (lagoon installations), the M modules (figure 6) can be installed permanently on catwalks or in cars that are move over the latter.

The upper part of the outer element (tube 1) of the module can be arranged to allow adjustment of the its position in the axial direction, that is, consequently, the adjustment of the position, in height, of the suction ports (5) and the rotary nozzle holder 10. For example, the element vertical exterior 1 of the module may be provided laterally, in its high part, of a zipper 19 whose purpose is to act in coordination with a locking device (not shown) that it is located at the entrance of the P step arranged on the roof T of the deposit for the introduction of said module.

As indicated above, the module It can have an adjustable length; in this case, its components Longitudinal (suction tube 1, injection tube 2, shaft 9) they can be constituted by assembled sections by means of suitable threaded fittings.

The module according to the invention can be used also in horizontal position. In this case, you enter horizontally in one of the records arranged at the base of the lateral wall of the deposits.

Obviously, all the accessories, parts, etc., comply with the standards and technical obligations and security that apply to the nature of the content of the deposit and of the installation in which the operation is planned.

Examples

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First, intrinsic safety, static electricity risks are made impossible; by the equipotentiality of the system connected to "Earth".

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Second, the fact that flow applications only take place submerged excludes any other creation of electricity static

The regular distribution of flows in circulation, dispersion and orientation are guaranteed, in case of preventive operation, by the thrust of the jets hydrodynamics submerged inside the volume contained in The deposit.

The duration of treatment operations is determined by the polls and the analyzes carried out in determined intervals (or permanently), which indicate the Treatment evolution

The same can be said of the frequency of interventions, which can only be determined by observations of the operator of the deposit. In the extreme limit, in certain cases can be planned for permanent or permanent implementation. sequence, of the intervention, performed by all or part of the modules according to the results found.

The implementation for preventive interventions preferably includes permanent installation of modules in the expected deposits. The modules are then protected by a rigid cover that puts them in the shelter of the weather, with a assembly and disassembly that do not need any maintenance special.

For commissioning it will be required only the connection to the hydraulic groups of the cables flexible feeding and distribution, so that collectors also remain in a fixed position. If the whole it is installed in a fixed way, it is possible to program, computerize and remotely control your drive from a central position.

If it's corrective operations, necessarily one of them has to be the first phase of a intervention plan, intended in principle to eliminate and / or recover the sediments already formed for later, in a second phase, use the same system after calibrating it, where appropriate, according to the specific needs of a preventive intervention: level and number of nozzles, section and geometry, number of modules, flow rates, pressures, etc., in Particular for large hydrocarbon vessels.

Previously the character has been insisted multifunction of the invention. There are two fundamental functions, which in the case of a preventive operation are at the same time different and, with exception, inseparable:

The dislocation, in the proper sense of the term, of sediment is indeed an indispensable precondition when sediments have a compact character, a result that the simple turbulence of agitation could not meet effectiveness.

Agitation is equally indispensable, in when the sediments have been removed, detached from the bottom or from the tank walls to which they frequently adhere.

These complementary functions will remain satisfied by the module's adaptability:

Yes, in the case of preventive action, the flow rate put into circulation by the module represents the parameter main, more important than the pressure under which it disperses in the volume in which the formation of the sedimentation, these factors are almost inverse when it comes to a corrective intervention, on an already formed sediment, adherent and compact.

In the first case, only hydrodynamic energy organized by the nozzles on which the tubes are provided Discharge is enough to disturb and keep moving the volume contained in the deposit.

In a corrective intervention, this energy hydrodynamics remains the "engine" of the system but also of the flows injected by the nozzles in the contained volume in the reservoir, the discharge tube may, and sometimes must, be provided in its lower part with more aggressive elements in the form of  arms 21 (figure 3) mounted with a tilting capacity in vertical planes, so that these arms extend the radius of action of these submerged jets while increasing their radius of action and the impact caused by the extension of submerged turbulence. The arms 21, whose free end is equipped with an ejection nozzle, they are mounted with a rotational capacity around the axis of the discharge tube 2 in the lower end to which they are connected.

When possible due to the nature of the liquid contained in the deposit and by the sediment, as well as by the dimensions of the deposit, we will try to gather the two functions of dislocation and agitation in the same module. So, the tube of injection, in its lower part, will dislocate the sediment by means of his arms 21; later (in its middle and high part) it will shake it by middle of the nozzles. Its rotation movement will guarantee a set up of the volume set contained in the Deposit.

The process according to the invention would not be full if you do not return to your operating entity such deposits that the state of its interior surfaces (bottom, walls, structures) make it possible, according to your needs and according to your Will:

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the entrance of the labor and inspection staff in an atmosphere devoid of harmfulness, breathable without mask or apparatus protection;

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the works of necessary maintenance, including repair work with flame;

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classification of deposit, if it is intended to receive other products to continuation.

When the treatment needs a rinse, it choose the rinse liquid depending on the nature of the sediment to be cleaned in the tank. In this case, the suction hole will open at the lowest level so that the amount of rinsing liquid can be saved.

The surfaces are then washed internal according to the operation described in the sections precedents After stirring and controls, the washing liquid out of the tank either to recover it or to treat or eliminate it by any procedure adapted to its nature (purification plant, neutralization, centrifugation, filtered, etc.).

If necessary it is possible to repeat a wash of these characteristics, and modify the rinse liquid as consequence of the results verified until obtaining the Desired degree of cleanliness and elimination of any atmosphere Dangerous, harmful or explosive interior.

If it is a liquid whose emanations Soda can be explosive or toxic, the procedure of washing will be restricted to submerged agitation, that is, to a liquid level significantly higher than the jets Rotary

If it's products that don't present these risks, you can proceed by direct jet projections rotating on the internal walls of the tank.

Choice of liquid: will depend on the objectives of results (technical, economic and ecological yields), but you will always have to adapt to the regulations and slogans of security.

Notwithstanding the possibility of finishing manuals (once made possible the entry of people thanks to the preceding phases) the washing phases and the products used, until obtaining the degree of cleanliness required.

They are, therefore, the same modules and their mode of specific operation those that ensure the extraction of sediment susceptible to pumping, and then cleaning, without need for additional installations or assemblies.

Claims (19)

1. Procedure for the maintenance of metastable liquids contained in deposits, both for a corrective action in layers of sediments already formed and for a preventive implementation, while eliminating the cause and its effects, characterized in that:

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in the product metastable contained in a deposit are introduced vertically a suction tube (1) and an injection tube (2) housed, with preferably concentrically, in said suction tube (one);

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the metastable product at a certain level of phase volume liquid of said product, by means of the suction tube (1) connected to the suction (01) of a pump (6), and

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it is reinjected immediately pressurized the liquid product aspirated into the mentioned volume of product contained in said deposit by means of this same pump and injection nozzles (7) connected to the discharge (02) of the latter by means of said injection tube (two).

2. Method according to claim 1, characterized in that the injection nozzles (7) are provided with a rotational movement (F1) around the axis of the concentric aspiration tubes (1) and injection (2). Method according to claims 1 or 2, characterized in that the injection nozzles (7) are provided with a rotation movement (F2) in a plane parallel to the axis of the concentric aspiration (1) and injection (2) tubes. . Method according to claim 2, characterized in that the injection nozzles (7) are mounted on the end of arms (21) which can be rotated in vertical planes. 5. Method according to any one of claims 2 to 4, characterized in that the injection nozzles (7) are provided with a rotation movement (F2) in planes parallel to the axis of the concentric suction (1) and injection ( two). 6. Autonomous multi-function module for the maintenance of metastable liquids, both for corrective action in sediment layers already formed and for preventive implementation, while eliminating the cause and its effects, characterized in that this module (M) contains:

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a pump (6), Y

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two tubes concentric, that is, a first outer tube (1) containing, in its lower part, at least one suction port (5) and whose upper part is connected to the suction hole (01) of said pump (6), and a second tube (2) whose upper part is connected to the discharge port (02) of said pump and whose end bottom is connected to injection nozzles (7) suitable for generate hydrodynamic jets.

7. Autonomous module according to claim 6, characterized in that said module (M) is provided with means that allow its vertical or substantially vertical placement in a container or tank containing the metastable product to be treated, through one of the openings (P) arranged in the roof (T) of said container or tank. 8. Autonomous module according to one of claims 6 or 7, characterized in that the aspiration port (5) provided with the aspiration tube (1) is or is positioned above and at a distance from the lower end of the module (M) which includes the lower end of the discharge tube or injection tube (2). 9. Autonomous module according to claim 6, characterized in that a filter (20) is placed in front of the suction port (01) of the pump (6). 10. Autonomous module according to claim 6, characterized in that the injection nozzles (7) are mounted with rotation capacity in a plane perpendicular to the axis of the concentric tubes (1, 2) and are coupled to a motor (8) which guarantees its drag in rotation. 11. Autonomous module according to one of claims 6 or 10, characterized in that the injection nozzles (7) are mounted with rotation capacity in planes parallel to the axis of the concentric tubes (1, 2) and are coupled to a motor ( 8) that guarantees its drag in rotation. 12. Autonomous module according to one of claims 6 or 10, characterized in that the injection nozzles (7) are mounted on the free end of arms (21) that rotate in vertical planes. 13. Autonomous module according to any one of claims 6 to 12, characterized in that the outer suction tube (1) contains, in its lower part, several staggered louvres (7) arranged in its side wall. 14. Autonomous module according to one of claims 6 or 13, characterized in that the suction port (7), or the assembly of the suction ports (7), is provided with an artichoke. 15. Autonomous module according to any one of claims 6 to 14, characterized in that at its lower end it is provided with a support base (18) on the ground, arranged under the rotating nozzle holder (10) and connected to the latter by means of a bearing. 16. Autonomous module according to one of claims 10, 11 or 12, characterized in that the rotating nozzles (7) are coupled to the motor (8) by means of a reducer. 17. Autonomous module according to any one of claims 6 to 16, characterized in that its length is adjustable, with the outer tube (1), the inner tube (2) and the shaft (9), for example, constituted by sections ( 1a, 1b, ...) assembled by means of threaded fittings (1n). 18. Multifunctional equipment for the maintenance of metastable liquids comprising at least one module (M) according to any one of claims 6 to 14, intended to be placed vertically or substantially vertically, in an opening (P) arranged in the roof (T) of the tanks, or any other support, characterized in that the upper part of the outer element (1) of the module (M) and the entrance of said opening are arranged in a complementary manner to allow adjustment of the position of said module in the axial direction. 19. Multi-function equipment for the maintenance of metastable liquids according to claim 18, characterized in that the vertical outer element (1) of the module (M) or of each module (M) is provided, laterally, with a rack (19) in order to act in coordination with a blocking device that provides the entrance of the passage (P) or of each passage (P) arranged in the roof (T, T1, T2) of the tank.