EP3551311A1 - Structure d'event d'une unite de pompage d'effluents, et unite de pompage associee - Google Patents
Structure d'event d'une unite de pompage d'effluents, et unite de pompage associeeInfo
- Publication number
- EP3551311A1 EP3551311A1 EP17811579.6A EP17811579A EP3551311A1 EP 3551311 A1 EP3551311 A1 EP 3551311A1 EP 17811579 A EP17811579 A EP 17811579A EP 3551311 A1 EP3551311 A1 EP 3551311A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vent structure
- structure according
- pumping unit
- vent
- conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/003—Explosive compounds, e.g. TNT
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
Definitions
- the present invention relates to the field of pumping and cleaning tanks that have contained volatile organic compounds (VOCs) and other flammable products.
- VOCs volatile organic compounds
- These cleaning facilities are usually equipped with a tank for collecting effluents and waste, on the one hand, cooperating with a pump, including a vacuum pump or a positive displacement pump or gravity filling and secondly, associated with a flexible pipe as well as a conduit for discharging into the atmosphere vapors emitted by the effluents or waste pumped.
- a pump including a vacuum pump or a positive displacement pump or gravity filling and secondly, associated with a flexible pipe as well as a conduit for discharging into the atmosphere vapors emitted by the effluents or waste pumped.
- VOCs volatile organic compounds
- ATEX zone The formation of explosive atmosphere, called "ATEX zone" is possible when a volume (even small) of flammable liquid waste is present in the product to be pumped.
- the physico-chemical characteristics of the substances that make up the waste that may have an impact on this risk are as follows: The flash point.
- LEL Lower Explosive Limit
- LSE Upper Explosive Limit
- the explosive limits of a combustible gas or vapor are the limit concentrations of the gas (in air) that allow it to ignite and possibly explode.
- the explosive range is characterized by the lower explosive limit (LEL) and the upper explosive limit (LSE).
- ATEX is formed when the flammable product is mixed with air in proportions between LEL and LSE.
- the areas concerned include:
- the sources of ignition are particularly numerous and include the following events:
- the hydro-curator handset (the engine of the handset in operation, the brakes, the retarders, the friction at the moving partition
- An external ignition source vehicle, welding work, hot spots on a machine .
- This dispersion can take place at the outlet of the pump vents, for example via an articulated arm a few meters in height.
- This dispersion can also take place by connecting to the outlet of the pump vent several suitable hoses to move the rejection of the mixture of flammable vapors and air to a marked area.
- the dispersion is at the mouth of these hoses placed on the ground in the marked area.
- the dispersion in the air is limited by the deposition on the ground of flexible, in that the unloading of the mixture of flammable vapors and air on the floor restricts the dispersion space.
- the change of speed and pressure at the outlet of the hose generates a condensation of vapors and the formation of a liquid, which in turn becomes a source of pollution.
- the good dispersion of the mixture of flammable vapors and air also depends on the direction of the wind and the difference in altitude between the outflow of discharges and the area of intervention. In fact, the vapors released can be heavier than air. Also, in the case where the altitude of the discharge output deported is greater than the altitude of its connection to the truck, the vapors once rejected can be brought to join by gravity the work area and the truck.
- This dispersion can take place by means of a filtration of the discharges by means of a filtration unit on activated charcoal.
- An exemplary embodiment is described in the document FR2799389.
- an object of the invention is to move away from the cleaning installation, in particular a combined vacuum cleaner hydro-cureur or pumping equipment and transport, the vapors emitted during the pumping of effluents. , noble products or liquid wastes containing flammable VOCs, and to disperse them.
- the object of the present invention is to overcome the aforementioned drawbacks by proposing a structure making it possible to channel the effluents from the outlets of the tank and vacuum pump vents into a safe and controlled place by offering the best possible dispersion. .
- the subject of the invention is a vent structure of an effluent pumping unit containing volatile organic compounds, the structure comprising an evacuation pipe in the atmosphere of the gases. contained in the effluents, said duct being provided with a first preferably bent end intended to be connected to the pumping unit and a second end open to the atmosphere, a frame for fixing to the ground the first end, a set forming a support adapted to maintain vertical the second end of the exhaust duct at a distance h from the first end, preferably greater than 3.5 meters.
- the chassis may comprise means for articulating the conduit in rotation, said means being coupled to a locking axis of said rotation.
- the chassis may include ground anchoring means.
- the chassis can be mounted on wheels.
- the support assembly may be provided with legs for vertical support of the conduit.
- the feet can be telescopic.
- the feet may include weights.
- the support assembly may include guy wires for vertical support of the conduit.
- the duct may be composed of rigid tubes assembled according to firefighter connections.
- the structure may comprise a condensation recovery device formed in the vicinity of the second end of the conduit, the device comprising a flange plated at the bottom of the second end, a bucket attached to the vicinity of the chassis and a pipe connecting the collar with bucket.
- the duct may be extended on the side of its second end by a mat carrying an air sleeve.
- the second end may be bent and secured to the mat, so that said second end extends in the same direction as the air shaft.
- the structure may include a measurement system to determine the LEL (Lower Explosive Limit) level.
- the structure may comprise a bubble level device in order to control the verticality of the evacuation duct.
- the invention also relates to an effluent pumping unit containing volatile organic compounds, provided with a conformal vent structure. to one of the embodiments of the invention.
- Figure 1 is a front view of a vent structure according to one embodiment of the invention.
- Figure 2 is a top view of a vent structure according to one embodiment of the invention.
- Figure 3 is a front view of an effluent pumping unit with a vent structure according to an embodiment of the invention.
- variants of the invention comprising only a selection of characteristics described, isolated from the other characteristics described (even if this selection is isolated within a sentence including these other characteristics), if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.
- This selection comprises at least one characteristic, preferably functional without structural details, or with only a part of the structural details if this part alone is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art .
- a front view of a vent structure of an effluent pumping unit containing volatile organic compounds (VOC) The structure comprises a conduit 1 for discharging into the atmosphere gases contained in the effluents.
- This duct is provided with a first end 10 intended to be connected to a pumping unit and a second end 11 open to the atmosphere.
- a frame 2 accommodates and maintains the first end, while a support assembly 3 maintains the vertical end of the second end of the exhaust duct.
- This vent structure has a movable character in that it can be moved easily. This implies that it can be disassembled, transported and reassembled easily.
- the distance h between the first and the second end is preferably greater than 3.5 meters. This minimum distance makes it possible to obtain a good dispersion and to limit the return of the discharges towards the ground.
- the diameter of the ducts 1 is preferably at least equal to the reject diameter of the pump. This avoids overheating, changes in fluid velocity and electrostatic charging of the assembly.
- the conduit 1 may be composed of rigid tubes 12 assembled according to firefighter connections 13.
- "Firefighter connections” means the symmetrical connectors also called “Guillemin fittings” which represent a mechanical device for connecting two pipe elements.
- the two pipes to be connected are then each provided with an identical and symmetrical half-connection.
- a half-coupling is composed of a body in front of which a groove comprises the seal, two half-shells or jaws, a freely rotating locking ring and having the ramps for locking, a rod maintaining the locking ring in position. To make the assembly, you must first put the half-fittings face-to-face, turning the rings so that the fingers are behind the guides for a given half-fitting.
- the duct 1 may carry handles 14 for assisting the fitting of the firefighter connections. It can also carry hooks 15 for winding cables.
- the chassis comprises means for pivoting the conduit 20 in rotation, so that the second end, carried by said conduit, can be oriented.
- Said second end can then be complemented bent, so as to be oriented in the direction of the wind.
- rotational articulation means 20 may be coupled to a locking pin 21 of said rotation, in order to freeze the orientation of the outlet of the gases contained in the effluents.
- the frame may be provided with anchoring means 22 on the ground.
- anchoring means 22 allow to secure the vent structure to the ground so as to secure its position in case of bad weather.
- these anchoring means are further provided to secure the first end and / or the second end.
- anchoring means are chosen according to the soil of the site. Thus, it will be preferred to use “sardine” type anchoring plugs for soft ground. On the other hand, we will rather choose weights and weight systems 33 for bitumen or concrete floors.
- the frame can be mounted on wheels.
- the support assembly 3 and intended to keep the second end of the duct vertical discharge may comprise a set of feet 30 and / or shrouds 31.
- the support 3 can be limited to three feet 30 and three stays 31.
- the stability of the structure can be optimized by placing the feet and shrouds respectively at an angle of 120 degrees.
- the feet and the stays can be provided with anchoring means 32 on the ground, which will be chosen according to the ground of the building site. Thus, it will be preferred to use “sardine" type anchoring plugs for soft ground. On the other hand, we will rather choose weights and ballasting systems for bitumen or concrete floors.
- the feet can be telescopic.
- the feet can then be assembled by nesting without tools. Manual tightening allows adjustment to the correct height.
- the bases of the feet can be mounted on ball joints 34 to enable them to adapt to the area of contact with the ground.
- weights 33 can be added to the feet.
- the structure comprises a device 4 for recovering condensation formed in the vicinity of the second end of the duct.
- the changes in velocity and pressure occurring at the mouth of the invention can cause the condensation of vapors in liquid.
- a condensate collection system is created just at the second end by the addition of a receptacle or flange 40.
- a suitable pipe 41 is connected to this system and allows to bring back the liquid condensates to a bucket 42 disposed at a height of man.
- the pipe is hung vertically with the help of a grommet.
- a bonding paste is present in the lower part and can support the bucket.
- the duct is extended on the side of its second end by a mat 5 carrying an air sleeve 50.
- the presence of an air sleeve allows the speakers to know at every moment the direction and strength of the wind and in case of change allows them to react and move and / or reorient the vent structure.
- the windsock can be mounted on a ball bearing system 52 allowing its free rotation.
- a counterweight system 51 may be added opposite the airbag to prevent its blockage in the event of vertical defect of the assembly.
- the second end is bent and secured to the mat, the whole being integral with the air sleeve, so that said second end extends in the same direction as the air sleeve.
- a measurement taking system 7 is disposed at man's height on the vertical part of the duct 1. Equipped with a manual quarter-turn valve, this system enables the workers to know, by means of an explosimeter, the level of LEL (Lower Explosive Limit) present in the exhaust duct.
- LEL Lower Explosive Limit
- the explosive limits of a combustible gas or vapor are the limit concentrations of the gas (in air) that allow it to ignite and possibly explode.
- the explosive range is characterized by the lower explosive limit (LEL) and the upper explosive limit (LSE).
- 60 magnetic, or any other equivalent device equip the structure to ensure, when mounting, its verticality.
- FIG. 3 represents an effluent pumping unit 6 containing volatile organic compounds, provided with a vent structure according to one embodiment of the invention.
- the connection between the pump unit and the vent structure takes place at a minimum distance of at least 20 m.
- it is a tanker truck for the transport of hydrocarbons, which must be purged lighter VOCs that float at the top of the tank of the truck, above the tank. air.
- This tank is at atmospheric pressure since it is connected to the outside by the vent.
- the vacuum pump draws air from the top of the tank and discharges it to the outside through the vent.
- By creating a vacuum in the tank it is possible to fill the tank with hydrocarbons by connecting the bottom of the tank to a tank supply. This is the difference in pressure between the pressure in the supply tank and the depression in the tank of the truck that sucks the contents of the tank towards the tank of the truck.
- the structure is composed of several parts that fit together without additional tools (interlocking, manual tightening or with an existing wrench key in vehicles).
- Each piece, weighing less than 25 kg, can be handled by one person and all parts can be transported in a van-type light vehicle.
- the assembly of the structure can be done by one person in less than 5 minutes.
- All the components of the structure are earthed and equipotential bonding is provided either by winders, or by the equipment themselves which are conductive (such as suction pipes for example).
- vent structure Most components are made of stainless steel, which has the advantage of being conductive, while offering electrical continuity less than 100 Ohm. This choice of material also makes it possible to limit the weight and to resist the vapors and external aggressions (rain, storage, manipulation, ).
- the vent structure according to the invention has the advantage of being mobile and transportable. This structure adapts moreover to the hazards of the field of intervention, and presents an easy and fast implementation. It also prevents any soil pollution during the condensation phenomenon, and allows a direct measurement of the LEL in the exhaust duct.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Ventilation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1662224A FR3059995B1 (fr) | 2016-12-09 | 2016-12-09 | Structure d’event d’une unite de pompage d’effluents, et unite de pompage associee |
PCT/EP2017/082086 WO2018104533A1 (fr) | 2016-12-09 | 2017-12-08 | Structure d'event d'une unite de pompage d'effluents, et unite de pompage associee |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3551311A1 true EP3551311A1 (fr) | 2019-10-16 |
Family
ID=58779087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17811579.6A Withdrawn EP3551311A1 (fr) | 2016-12-09 | 2017-12-08 | Structure d'event d'une unite de pompage d'effluents, et unite de pompage associee |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3551311A1 (fr) |
FR (1) | FR3059995B1 (fr) |
WO (1) | WO2018104533A1 (fr) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB708432A (en) * | 1951-01-30 | 1954-05-05 | True Flue Ltd | Improvements in or relating to chimney stacks |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US837729A (en) * | 1905-09-15 | 1906-12-04 | Robert S Reid | Tent-chimney. |
FR1499822A (fr) * | 1966-11-18 | 1967-10-27 | Wright Rain Ltd | Ensemble formant colonne montante pour canalisation d'arrosage ou d'irrigation |
US3684178A (en) * | 1971-03-23 | 1972-08-15 | Richard F Friedlander | Traveling agricultural sprinkler |
FR2799389B1 (fr) | 1999-10-12 | 2001-12-07 | Sofrance Sa | Procede et dispositif de traitement de vapeurs emises lors du pompage de liquides renfermant des composes volatils au cours d'operations de nettoyage ou de remplissage. |
AU782466B2 (en) * | 2000-06-06 | 2005-07-28 | Stuart Dundonald Reid | Irrigator |
EP2221549A1 (fr) * | 2009-02-24 | 2010-08-25 | Siemens Aktiengesellschaft | Dispositif d'évacuation de gaz explosifs |
FR3009742B1 (fr) * | 2013-08-14 | 2019-05-17 | Ortec Expansion | Procede et unite de pompage de produits inflammables susceptibles de former une atmosphere explosive |
-
2016
- 2016-12-09 FR FR1662224A patent/FR3059995B1/fr not_active Expired - Fee Related
-
2017
- 2017-12-08 EP EP17811579.6A patent/EP3551311A1/fr not_active Withdrawn
- 2017-12-08 WO PCT/EP2017/082086 patent/WO2018104533A1/fr unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB708432A (en) * | 1951-01-30 | 1954-05-05 | True Flue Ltd | Improvements in or relating to chimney stacks |
Also Published As
Publication number | Publication date |
---|---|
FR3059995B1 (fr) | 2021-08-13 |
FR3059995A1 (fr) | 2018-06-15 |
WO2018104533A1 (fr) | 2018-06-14 |
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