Modular ventilation system

Abstract

The invention relates to a modular ventilation system for a building, comprising: - at least one first extraction module comprising a first casing and at least one air extraction unit disposed inside the first casing, the air extraction unit being adapted to draw air from outside the first casing via the first air inlet opening and to inject the drawn air towards the first air outlet opening, and - at least one second filtration module comprising a second casing and at least one filtration unit disposed inside the second casing, the air filtration unit being adapted to filter air coming from the second air inlet opening, the filtered air being discharged towards the second air outlet opening, the modular ventilation system being configured to be able to selectively adopt a functional configuration and a storage and / or transport configuration. Figure for the abstract: Fig. 6

Description

Title of the invention: Modular ventilation device Scope of the invention

[0001] The present invention relates to a modular ventilation system for a building, particularly for the decommissioning of a nuclear power plant. Technological background

[0002] The electromechanical dismantling of contaminated equipment, such as that found in certain areas of nuclear power plants, and the decontamination of structures within a contaminated area of ​​such a plant require the installation of a suitable ventilation system. Indeed, when operators carry out these dismantling and decontamination operations, it may be necessary to establish static and dynamic containment around the area to be dismantled. For this purpose, an extraction system, equipped with High Efficiency Particulate Air (HEPA) filtration, is required to expel the extracted and filtered air to a discharge point. A ventilation system is installed for this purpose, for the duration of the dismantling operations, which can last from a few days to several decades.

[0003] The temporary ventilation system must be adapted to the specific characteristics of the dismantling site. In particular, the ventilation system to be installed must be sized according to the desired extraction and supply flow rates for the building to be dismantled. These flow rates take into account the volume of air to be extracted, the quantity of contaminants, and the type of contaminants, including radioactive elements, asbestos, or silica.

[0004] Once the dismantling operations are completed, the ventilation system itself is dismantled and transported to be disposed of at a waste storage facility.

[0005] The operations to dismantle the ventilation system are costly, and generate a significant amount of waste.

[0006] Indeed, the temporary ventilation system put in place for a building dismantling site is specifically designed for that building, and therefore cannot generally be used for the dismantling of another building, even if some equipment is still in working order. Description of the invention

[0007] One objective of the invention is to facilitate the design, assembly and dismantling of temporary ventilation systems, in particular ventilation systems used for the dismantling of nuclear power plants.

[0008] To this end, the invention's first object is a modular ventilation system for the building, comprising: - at least one first extraction module comprising a first box and at least one air extraction unit disposed inside the first box, the first box comprising at least one first door allowing an operator to move between the outside and inside of the first box, at least one first air inlet opening and at least one first air outlet opening, the air extraction unit being capable of drawing air from outside the first box via the first air inlet opening and injecting the drawn air towards the first air outlet opening, and - at least one second filtration module comprising a second box and at least one filtration unit disposed inside the second box, the second box comprising a second door allowing an operator to move between the outside and inside of the second box, a second air inlet opening and a second air outlet opening, the air filtration unit being suitable for filtering air coming from the second air inlet opening, the filtered air being discharged towards the second air outlet opening, the modular ventilation system being configured to be able to selectively adopt, a functional configuration in which the second air inlet of the second box is connected to the building, in particular to a room to be ventilated in the building, and in which the second air outlet of the second box is connected to the first air inlet of the first box so as to extract air from the room of the building by the extraction unit via the filtration unit so that the air is filtered, by the filtration unit, before being extracted by the extraction unit by means of the first air outlet, a storage and / or transport configuration in which the second filtration module is disconnected from the building, and in which the first extraction module and the second filtration module are disconnected from each other,so that the first extraction module and the second filtration module can be stored and / or transported independently of each other.

[0009] The first extraction module and the second filtration module can thus be transported to a dismantling site, used there, and then transported again to a storage location or to another dismantling site. The modules can therefore be easily reused and not discarded while still in working order.

[0010] Moreover, each module can be transported and stored independently.

[0011] This modular ventilation system thus offers great adaptability and therefore ease of use for various dismantling projects.

[0012] According to particular embodiments of the invention which may be taken alone or in combination: - the first extraction module has an extraction capacity of 5000 to 35,000 m3 / h of air; different extraction capacities can be obtained depending on the number of extraction units contained in the box and depending on the power of the extraction unit(s); - the ventilation system comprises a plurality of first extraction modules and a plurality of second filtration modules, each second filtration module being suitable for connection to a respective first extraction module; - the ventilation system further includes at least one third control module, comprising a third box and at least one third control unit disposed inside the third box, the third box including a third door allowing an operator to move between the outside and inside of the third box, and in which the third control module is suitable, in the functional configuration of the system, to be electrically connected to each first extraction module and / or each second filtration module to allow the control unit to control the extraction unit and / or the filtration unit, and in the storage and / or transport configuration, to be disconnected from the other modules, so that it can be stored and / or transported independently of the other modules; - the ventilation system further includes a separate exhaust chimney, in the functional configuration of the system, to be connected to the first air outlet opening of each first extraction module in order to evacuate the air filtered by the filtration unit and then extracted by the first extraction module, and, in the storage and / or transport configuration, to be disconnected from the first extraction modules, so that it can be stored and / or transported independently of the other modules; - the ventilation system also includes at least one fourth monitoring module comprising a fourth box and at least one analysis and detection unit disposed inside the fourth box, the fourth box including a fourth door allowing an operator to move between the outside and inside of the fourth box, and in which the fourth monitoring module is suitable, in the functional configuration of the system, to be connected to the exhaust stack, to allow the analysis and detection unit to analyze the air exhausted via the exhaust stack, and in the storage and / or transport configuration, to be disconnected from the exhaust stack so that it can be stored and / or transported independently of the other modules and the exhaust stack; - the ventilation system further comprises at least one fifth air supply module comprising a fifth casing and at least one supply unit disposed inside the fifth casing, the fifth casing comprising a a fifth door allowing an operator to move between the outside and inside of the fifth chamber, a fifth air inlet opening and a fifth air outlet opening, and in which the fifth air blowing module is suitable, in the functional configuration of the system, to be connected to the building to allow the blowing unit to draw air from outside the building via the fifth air inlet opening and to blow the drawn air into the building via the fifth air outlet opening, and in the storage and / or transport configuration, to be disconnected from the building, so that it can be stored and / or transported independently of the other modules; - the fifth air blowing module has a blowing capacity ranging from 5000 to 35,000 m3 / h; - the ventilation system further includes an air handling unit comprising a heating and / or cooling device for the air taken in before it is blown into the building; - the ventilation system further includes at least one sixth refrigeration module comprising a refrigeration box in which a refrigeration unit is disposed and which is suitable, in the functional configuration of the system, for being connected to the air handling unit of the fifth air supply module, so that the air handling unit can cool the air taken in by the supply unit by means of the cooling device, and in the storage and / or transport configuration, for being disconnected from the fifth supply module, so that it can be stored and / or transported independently of the other modules; - the ventilation system includes several fifth air blower modules; and - the ventilation system includes several sixth refrigeration modules, each refrigeration module being designed to be connected to the air handling unit of a respective fifth air supply module. Brief description of the Figures

[0013] Other features and advantages of the invention will become apparent from the following description, given solely by way of example and with reference to the accompanying drawings, in which:

[0014] [Fig.1a] [Fig.1a] is a schematic top view of a ventilation system according to an embodiment of the invention in a functional configuration;

[0015] [Fig.lb] the [Fig.lb] is a schematic top view of the ventilation system of the [Fig. la] in a storage and / or transport configuration;

[0016] [Fig.2a] [Fig.2a] is a schematic and perspective view of a first module extraction according to an embodiment of the invention;

[0017] [Fig.2b] [Fig.2b] is a schematic and perspective view of a first extraction module according to one embodiment of the invention;

[0018] [Fig.3] [Fig.3] is a schematic and perspective view of a second filtration module according to one embodiment of the invention;

[0019] [Fig.4] [Fig.4] is a schematic top view of a ventilation system comprising two secondary extraction modules and two secondary filtration modules;

[0020] [Fig.5a] [Fig.5a] is a schematic and perspective view of a third filtration module according to one embodiment of the invention;

[0021] [Fig.5b] [Fig.5b] is a schematic view of a third filtration module according to one embodiment of the invention;

[0022] [Fig.6] [Fig.6] is a schematic top view of a ventilation system according to an embodiment of the invention;

[0023] [Fig.7] [Fig.7] is a schematic and perspective view of an exhaust chimney according to an embodiment of the invention;

[0024] [Fig.8a] [Fig.8a] is a schematic and perspective view of a fourth monitoring module according to one embodiment of the invention;

[0025] [Fig.8b] [Fig.8b] is a schematic and perspective view of a fourth monitoring module according to one embodiment of the invention;

[0026] [Fig.9a] [Fig.9a] is a schematic and perspective view of a fifth air blowing module according to an embodiment of the invention;

[0027] [Fig.9b] [Fig.9a] is a schematic and perspective view of a fifth air blowing module according to one embodiment of the invention; and

[0028] [Fig. 10] [Fig. 10] is a schematic and top view of a ventilation system according to an embodiment of the invention. Detailed description of an example of implementation

[0029] With reference to figures 1a, 1b, 2 and 3, a modular ventilation system 800 according to an embodiment of the invention comprises a first extraction module 100 and a second filtration module 200.

[0030] The first extraction module 100 comprises a first casing 102 inside which an air extraction unit 110 is located. The first casing 102 includes a first door 140 allowing an operator to move between the outside and inside of the casing. An operator can thus perform control and / or maintenance operations, or bring functional elements into the casing 102 in order to replace defective elements such as fans. Furthermore, the first casing 102 includes a first air inlet opening 106 and a first air outlet opening 108. The air extraction unit 110 allows air to be drawn in from outside the first box 102 via the first air inlet opening 106 and the previously drawn-in air to be expelled by injecting it towards the first air outlet opening 108.

[0031] The second filtration module 200 comprises a second housing 202 inside which a filtration unit 210 is located. The second housing 202 includes a second door 204 allowing an operator to move between the outside and inside of the housing. As with the first housing 102, the door allows the operator to perform control and / or maintenance operations and also to bring equipment into the housing 202. Furthermore, the second housing 202 includes a second air inlet 206 and a second air outlet 208. The air filtration unit 210 filters air from the second air inlet 206 and then discharges this filtered air through the second air outlet 208.

[0032] The ventilation system can adopt two possible configurations: a functional configuration represented on [Fig. la] and a storage and / or transport configuration represented on [Fig.lb].

[0033] In the functional configuration, the second filtration module 200 is connected to a room 902 to be ventilated in the building 900, in particular to an opening 904 of this room, this room 902 being able to be a room or an area inside the building 900. The second filtration module 200 is then connected to the room 902 by the second air inlet opening 206 and the second air outlet opening 208 is then connected to the first extraction module 100 by the first air inlet opening 106. The first extraction module 100 then receives the air from the second filtration module 200 and expels it through the first air outlet opening 108.

[0034] Thus, in this functional configuration, the potentially contaminated air contained in the building 900, and in particular in the room 902 to which the ventilation system is connected, is drawn in by the first extraction module 100 via the second filtration module 200. The air drawn in from the room 902 is then filtered by the filtration unit 210 to be at least partially decontaminated, then this filtered air is drawn in and evacuated to the outside of the building by the extraction unit 110.

[0035] In this functional configuration, the connection between room 902 and the second filtration module 200, between the second filtration module 200 and the first extraction module 100, and between the first extraction module 100 and the exterior of the building 900, is made by means of airtight ducts 802, 803, and 804. A first duct 802 is then connected airtight to opening 904 and to the second air inlet opening 206, a second duct 803 is connected airtight to the second air outlet opening 208 and to the first air inlet opening 106, and a third duct 804 is connected to the first opening of air outlet 108 and outside the building.

[0036] If the air exiting the first extraction module 100 is not contaminated, following effective filtration, the air can be discharged directly outside the building. If the extracted air is potentially still contaminated, it is discharged through a chimney that may belong to the building to which the ventilation system 800 is connected or through a chimney installed for this purpose.

[0037] In the storage and / or transport configuration, the second filtration module 200 is disconnected from the building 900, and the first extraction module 100 and the second filtration module 200 are disconnected from each other. The first extraction module 100 and the second filtration module 200 can then be stored and / or transported.

[0038] The ventilation system is therefore modular, since the installation of the units can be adapted to each building dismantling site, taking into account their size, the location of the room, and also the type and quantity of contaminants in the building. Indeed, the units can be installed and arranged in different ways, and the ventilation system can therefore be adapted to the location of the room to be ventilated within the building being dismantled.

[0039] In the storage and / or transport configuration, the openings of the cases are preferably closed in a watertight manner by means of tapes, or any other watertight closing system.

[0040] The crates can thus be stored and / or transported and then reused directly without any need to alter their contents. Furthermore, the crates are easily stackable, which facilitates both storage and transport.

[0041] The first and second containers 102 and 202 are preferably standard leak-proof containers, preferably IP2 containers that ensure total leak-proofness as defined for an IP2-type package and prevent any leakage of radioactive material that may be present in the container. If IP2 containers are used, the means used to close the openings ensure this total leak-proofness.

[0042] The use of standard containers allows for optimized storage and also transport by train, truck and / or boat.

[0043] The first chamber 102 and the second chamber 202 may be of the same dimensions or of different dimensions, these dimensions preferably being standard. Preferably, the second filtration chamber 202 is larger than the first extraction chamber 102.

[0044] The first and second modules 102 and 202 may contain elements other than those described with reference to Figures 2 and 3, in particular a greater number of doors and openings, one or more other functional unit(s), by for example several extraction units in the first extraction module and / or several filtration units in the second filtration module, and also other elements as described later.

[0045] The first extraction module 100 has an extraction capacity ranging from 5,000 m³ / h to 35,000 m³ / h, thus creating a negative pressure of approximately 3,000 Pa upstream of each filtration unit. Such a negative pressure corresponds to the needs of construction sites. For a given extraction module, the extraction capacity can vary depending on the number of extraction units it contains and the power of each extraction unit. It is also possible, when the extraction module contains several extraction units, to operate only some of these extraction units.

[0046] The extraction capacity of the first module 100 can thus be adapted to the room to be ventilated by choosing the extraction module with the desired capacity and / or by choosing the number of extraction units of the module to be operated.

[0047] Furthermore, the ventilation system may comprise a plurality of first extraction modules and a plurality of second filtration modules. In such a system, each second filtration module is designed to be connected to its respective first extraction module. Each second filtration module is also connected to the room to be ventilated. According to one possible variant, the second filtration modules may be connected to the room independently, i.e., each from a separate opening in the room. According to another possible variant, the second filtration modules may be connected to the room through the same opening. In such a system, the two extraction modules and / or the two filtration modules are preferably identical but may be different.

[0048] An example of a ventilation system comprising a plurality of first extraction modules and a plurality of second filtration modules is illustrated in [Fig. 4]. In this example, the ventilation system 1000 comprises two first extraction modules 100a and 100b and two second filtration modules 200a and 200b. Each second filtration module is designed to be connected to a first extraction module, thus forming a subsystem.

[0049] The ventilation system 1000 thus comprises a first ventilation subsystem 800a which is identical to the system 800 described with reference to [Fig. 1a], the various elements of the subsystem 800a bearing the same reference as the elements of the system 800 but affected by an index "a", and a second ventilation subsystem 800b which is identical to the system 800, the various elements of the subsystem 800a bearing the same reference as the elements of the system 800 but affected by an index "b".

[0050] In this example, the first subsystem 800a is connected to room 902 by a The first opening 904a, via the second filtration module 200a, and the second subsystem 800b are connected to room 902 by a second opening 904b, also via the second filtration module 200b. Furthermore, each subsystem 800a and 800b have a third exhaust duct, 804a and 804b respectively, for venting the extracted and filtered air to the outside. These third exhaust ducts, 804a and 804b, can vent the extracted air directly to the outside, or they can each be connected to a separate exhaust stack, or conversely, they can both be connected to the same stack.

[0051] A ventilation system comprising multiple subsystems can be adapted to the needs of the worksite and easily scaled to the size of the space to be ventilated, as well as to the quantity and type of contaminants and / or toxic elements present in the building, for example, asbestos and / or radioactive materials. Indeed, it eliminates the need to modify the internal components of the filtration and extraction modules to change the extraction capacity, allowing the number of modules to be varied. The system is thus modular and adaptable, enabling the use of the first extraction modules and / or the second filtration modules successively for different worksites, particularly nuclear power plant decommissioning projects.

[0052] According to one possible embodiment, a system may comprise a different number of first extraction modules and second filtration modules. According to this embodiment, several first extraction modules may be connected to a single filtration module.

[0053] According to a detailed embodiment illustrated in [Fig. 2b], the first extraction module 100 comprises a housing 102 which is a standard-sized 20-foot high cube IP2 container (also known as a "20-foot high cube"). The first extraction unit 110 includes a first extraction fan 112a and a second extraction fan 112b, each providing 50% of the nominal flow rate of the extraction unit 110.

[0054] Container 102 and the containers which will be described later can be insulated with rock wool or any type of insulating material.

[0055] Each fan 112a and 112b is equipped upstream (in the direction of airflow) with a manual isolation damper, and downstream with a check valve and then a manual isolation damper.

[0056] In order to allow the adjustment of a flow rate from 5000 m3 / h to 35000 m3 / h while maintaining a depression of 3000 Pa at the connection point between the room 902 and the second air inlet opening 206 of the second filtration module 200, each fan 112a and 112b being equipped with a speed variator and an upstream tilter.

[0057] The first extraction unit 110 is also connected to a setting register positioned in the second filtration module.

[0058] The first extraction module 100 further includes a lighting system for light and security lighting, fire detectors, a temperature measurement and an air conditioner.

[0059] In this embodiment, the first container 102 is equipped with two access doors 104a and 104b, each positioned at one end of the container so as to facilitate access for one or more operators to the different parts of the container 102.

[0060] The second filtration module 200 connected to the first extraction module 100 includes a box 202 which is a standard-sized IP2 container of 40 feet high height (also known as "40 feet high cube").

[0061] Container 202 has a first filter zone 212 and a second access zone 214.

[0062] The second filtration unit 210 is positioned in the filter zone 212 and includes a ventilation branch to maintain this filter zone 212 at a depression of approximately -80 Pa in order to confine the contamination inside the container 202. The ventilation branch is equipped with a very high efficiency (HEPA) filter, a sealed manual isolation damper, and a motorized adjustment damper.

[0063] Access zone 214 allows access to the filter area without loss of vacuum. This access zone 214 is ventilated and includes a vacuum display that an operator can view.

[0064] The second filtration unit 210 also includes a first filtration line 216 and a second filtration line 218 parallel to the first filtration line, each filtration line providing 50% of the nominal flow rate. Each filtration line is airtight so that the air is evacuated to the first extraction module without breaking containment.

[0065] The second filtration unit 210 has an air inlet duct 222 connecting the second air inlet opening 206 to each filtration line 216 and 218, and includes a motorized isolation damper. The second filtration unit 210 also includes an exhaust duct 220 connecting each filtration line 216 and 218 to the second air outlet opening 208.

[0066] Each filtration line 216, 218 comprises different stages each including a differential pressure measuring device, the first stage serving to carry out a first filtration and thus protect the second filter.

[0067] The second filtration module 200 also includes a reference atmospheric pressure tapping device installed outside the box on the roof or on a side wall.

[0068] The second filtration module is also equipped with a lighting system, of a fire detector, a duct smoke detector, a temperature measuring device, a dose rate measuring device monitoring the level of radioactivity, an individual fire water retention device, and a control-command device.

[0069] The first air extraction container 100 and the second filtration container 200 are each insulated internally with rock wool.

[0070] With reference to [Fig.5a], the ventilation system 800 may also include a third control module 300 comprising a third box 302 and a control unit 310 located inside the third box 302. The third box 310 also includes a third door 304 allowing an operator to move between the inside and outside of the third box 302 and also for maintenance and equipment replacement operations.

[0071] In a functional configuration shown in [Fig.6], the third control module 300 is electrically connected to the first extraction module 100 and the second filtration module 200. The control unit 310 can thus control the extraction unit 110 and the filtration unit 210. The control unit 310 includes one or more devices selected from an electrical power supply device, a transformer adaptable to the building voltage, a control and command device for the operation of the first filtration module and a control and command device for the operation of the second extraction module.

[0072] In a storage and / or transport configuration, the third control module 300 is disconnected from the first extraction module and the second filtration module. The third control module 300 can then be stored and / or transported independently of the other modules.

[0073] In the event that the ventilation system does not include a third control module 300, the ventilation systems can be electrically connected to a control system present in the building allowing the extraction unit and / or the filtration unit to be controlled.

[0074] According to a detailed embodiment illustrated in [Fig.5b], the third control module 300 comprises a box 302 which is a standard 40-foot high cube container (also known as a "40-foot high cube").

[0075] In this embodiment, the third control unit 310 includes a first transformer 322 positioned in a first zone 312, a second transformer 326 positioned in a second zone 316, a general low voltage switchboard (TGBT) 324 positioned in a third zone 314 and an air conditioning device 328 positioned in a fourth zone 318.

[0076] The first zone 312 is accessible through a first door 304a, the second zone 316 is accessible through a second door 304c, the third zone 314 is accessible through a third door 304b, and the fourth zone 318 is accessible through a fourth door 304d.

[0077] The third control unit 310 also includes a control cabinet, a human-machine interface (HMI) including a touch screen and indicator lights showing the presence of voltages or faults, a fire detection device and a lighting device, a fire detection control unit which centralizes information from the fire detectors present in the other modules, and also an inverter and batteries in case the site power supply is cut off.

[0078] The third control module 300 further includes a fiber optic or copper loop and power cables 840 for connecting the control cabinet of the third control module 300 to the control device of each module of the ventilation system 800. In addition, the third control module 300 can also be connected by power cables to the electrical system present on the site.

[0079] With reference to Figures 6 and 7, the ventilation system 800 may further include an exhaust stack 700. In a functional configuration illustrated in [Fig. 6], the exhaust stack 700 is connected to the first air outlet of the first extraction module 100 by means of an exhaust opening 706 of said exhaust stack. Thus, the air from the building, once filtered and extracted, is discharged to the outside.

[0080] The exhaust chimney 700 preferably consists of a cylinder 702 mounted on a base 704 for fixing to the ground. The cylinder 702 may be telescopic so that its height can be adapted, on the one hand, to the dimensions of the building and / or the dismantling site and, on the other hand, to the volume and / or flow rate of air to be evacuated.

[0081] In a storage and / or transport configuration, the exhaust chimney 700 is disconnected from the first extraction module 100, and the exhaust opening 706 is then preferably closed by a flap or a closing hatch. If the cylinder 702 is telescopic, it can be compacted to facilitate storage or transport.

[0082] In the case where the ventilation system does not have an exhaust chimney, the exhaust is carried out by a chimney already present on the site and to which the first extraction module is connected.

[0083] In the case where the ventilation system has several first extraction modules, the ventilation system preferably has a single exhaust stack, and the first extraction modules are then all connected to said stack. However, the ventilation system may also have several chimneys, each first extraction module then being connected to a separate chimney.

[0084] With reference to Figures 6, 7 and 8a, the ventilation system 800 may further include a fourth monitoring module 400 comprising a fourth box 402 and an analysis and detection unit 410 which is disposed inside the box 402. The fourth box 402 has a door 404 allowing an operator to move between the outside and the inside of the building 900.

[0085] In a functional configuration of the ventilation system 800, the fourth monitoring module 400 is connected to the exhaust stack 700 by means of a sampling and exhaust loop 412 passing through sampling openings 708, 406a, and 406b. This loop draws in the exhaust air from the stack, routes it to sensors in the unit 410 for analysis, and then exhausts it back into the stack. Thus, the analysis and detection unit can analyze the air extracted from the building and exhausted through the exhaust stack 700. The fourth monitoring module 400 analyzes the exhaust air and verifies that it contains limited quantities of harmful elements, such as radioactive compounds.

[0086] When the ventilation system 800 includes a third control module 300, the latter is electrically connected to the fourth monitoring module 400 and allows the fourth monitoring module 400 to be supplied with electricity and also to control its operation.

[0087] In the event that the ventilation system does not include a fourth monitoring module, the analysis of the exhaust air, if necessary, is carried out by a monitoring module already present on the site.

[0088] In the storage and / or transport configuration, the fourth monitoring module is disconnected from the chimney and also from the third control module 300 if the ventilation system 800 includes such a module.

[0089] According to a detailed embodiment shown in [Fig. 8b], the exhaust chimney 700 comprises a cylinder 702 with a minimum height of 11 m and which can be of different diameters. In particular, the diameter can be 450 mm for an air extraction rate of 5000 to 10000 m³ / h, 650 mm for an air extraction rate of 10000 to 21000 m³ / h, 900 mm for an air extraction rate of 21000 to 45000 m³ / h, and 1300 mm for an air extraction rate of 45000 to 90000 m³ / h.

[0090] Thus, depending on the needs of the construction site in the room 902 to which the ventilation system 800 is connected, depending on the extraction capacity of the first extraction module 100 and depending on the number of first extraction modules included in the ventilation system, it is possible to choose an exhaust chimney according to its diameter.

[0091] The base 604 of the chimney is preferably fixed to the ground and in particular sealed by means of a flange.

[0092] According to a detailed embodiment shown in [Fig.8b], the fourth monitoring module 400 comprises a box 402 which is a standard-sized 20-foot high cube IP2 type container (also known as a "20-foot high cube").

[0093] The fourth monitoring module 400 includes at least one analysis unit 410 which includes sampling devices (in particular rods) 412, at least one air flow measurement sensor in the stack 700, manual direct passage isolation valves upstream and downstream of each sampling device, and discharge devices (in particular rods) 414 whose discharge is located on the stack 700 downstream of the sampling devices.

[0094] Sampling devices can allow the retention of aerosols by filters, the sampling of iodine on an activated carbon cartridge, the sampling of tritium in a bubbler, or the sampling of carbon 14 on a molecular sieve.

[0095] Furthermore, the fourth monitoring module 400 also includes a lighting device, fire detectors, a fire water retention device, a temperature measurement sensor and an air conditioning device.

[0096] When the building 900 to be dismantled has openings or has a weak seal, the depression generated by the extraction of air by means of the first extraction module 100 is compensated by spontaneous air inlets into the building.

[0097] However, when the building 900 is relatively airtight and the amount of extracted air cannot be compensated by outside air inlets, the ventilation system 800 further includes a fifth air blowing module 500.

[0098] The blowing module can also be used solely to heat or cool the temperature inside the building.

[0099] With reference to Figures 6 and 9a, the fifth air blowing module 500 comprises a fifth box 502 inside which is arranged a blowing unit 510. The fifth box 502 also includes a fifth door 504 allowing an operator to move between the outside and inside of the fifth box 502. Furthermore, the fifth box 502 includes a fifth air inlet opening 506 and a fifth air outlet opening 508.

[0100] In the functional configuration of the system 800, the fifth air supply module 500 is connected to the room 902 by means of a sixth duct 806 which connects the fifth air outlet 508 of the unit 502 to a suction opening 906 of the room 902. In this way, the fifth air supply module 500 draws in outside air from the fifth air inlet 506 and the air blows into the room 902 through the fifth air outlet opening 508, by means of the fifth blowing unit 510.

[0101] Thus, the fifth air blowing module 500 makes it possible to compensate for the depression caused in the room 902 by the extraction of air by means of the first air extraction module 100.

[0102] Furthermore, the fifth air blowing module 500 may include an air handling unit 520 comprising a heating device and / or a cooling device for the air taken in before blowing it into the building.

[0103] In the storage and / or transport configuration, the fifth air blower module 500 is disconnected from the building 900 and can then be stored and / or transported.

[0104] In this configuration, the openings 506 and 508 of the fifth box 502 are preferably closed hermetically by means of hatches or taps, or any other hermetically sealed closure system.

[0105] The fifth air blowing module preferably has a blowing capacity ranging from 5000 m³ / h to 35000 m³ / h. For a given air blowing module, the blowing capacity can vary depending on the number of blowing units it contains and the power of each blowing unit. It is also possible, when the fifth air blowing module contains several blowing units, to operate only some of these blowing units.

[0106] The supply air capacity of the fifth module 500 can thus be adapted to the room to be ventilated by selecting the air supply module with the desired capacity and / or by selecting the number of supply units of the module to be operated. The fifth supply module 500 is also adapted to the extraction capacity of the first air extraction module 100.

[0107] Furthermore, the ventilation system 800 may comprise a plurality of fifth air supply modules 500, preferably identical but possibly different. In such a system, each fifth supply module is designed to be connected to the room to be ventilated. Preferably, the fifth supply modules are connected to the room independently, i.e., each from a separate opening in the room. However, according to a possible variant, the fifth supply modules may be connected to the room through the same opening.

[0108] As illustrated in [Fig. 6], where the air handling unit 520 includes a cooling device, the ventilation system 800 may further include a sixth refrigeration module 600 comprising a refrigeration unit 610 that can be connected to the air handling unit 520. When the ventilation system 800 is in its functional configuration, the air handling unit 520 is connected to the refrigeration unit 610, thus cooling the air taken by the blowing module 500.

[0109] Thus, the sixth refrigeration module 600 makes it possible to maintain in the room 902 a suitable working temperature in the event that the temperature outside the building 900 is too high.

[0110] In the storage and / or transport configuration, the sixth refrigeration module 600 can be disconnected from the fifth air conditioning module 500 so that it can be stored and / or transported independently of the other modules.

[0111] Figure 6 illustrates a ventilation system 800 comprising the various modules just described, as well as the chimney. However, the ventilation system 800 may comprise only the first air extraction module 100 and the second filtration module 200, or it may comprise the first air extraction module 100 and the second filtration module 200 and one or more of the other modules.

[0112] According to a detailed embodiment shown in [Fig.9b], the fifth blowing module 500 comprises a box 502 which is a standard dimension container 40 feet high (also known as "20 feet high cube").

[0113] The fifth blowing module 500 includes a blowing unit 510 which has a first ventilation line 512 and a second ventilation line 514, each line generating 50% of the airflow blown into the room 902. Each ventilation line 512, 514 includes a manual isolation damper, a centrifugal fan equipped with a speed controller and a tilter, and a non-return valve downstream of the fan.

[0114] Outside air is extracted through an extraction opening 506, passes through the treatment unit 510 where it is optionally cooled or heated, then passes through the two ventilation lines 512 and 514. The two ventilation lines 512 and 514 join in a common duct 516 so as to blow the air into the building through the supply opening 508.

[0115] The blowing unit 510 further includes a motorized isolation damper, an extractor to ensure the renewal of the air in the container, a duct smoke detector and a fire detector, a lighting device, a fire water retention device, a temperature measurement sensor and an air conditioning device.

[0116] Container 502 further includes an external air intake grille equipped with electrically traced anti-rain, anti-bird, anti-snow and anti-frost devices.

[0117] The air handling unit 510 includes a cold coil for cooling the air taken from outside the module before injecting it into room 902 and a hot coil for heating the air taken from outside the module before injecting it into room 902. The air can thus be cooled or heated as required.

[0118] The cold battery is powered by a sixth refrigeration module 600 comprising the refrigeration unit 610 associated with an expansion tank 620 whose dimensions allow standard transport.

[0119] Figure 10 illustrates a ventilation system 800 comprising three first extraction modules 100, each associated with a second filtration module 200 as described in Figure 2b. These three extraction module / filtration module subsystems allow air to be extracted and filtered from the room 902.

[0120] The extracted air is then vented outside through the exhaust chimney 700 which is associated with a fourth monitoring module as described in [Fig.8b].

[0121] The ventilation system also includes three fifth supply modules 500 each being associated with a sixth refrigeration module 600 as described in [Fig.9b] which make it possible to compensate for the depression created by the extraction modules 100.

[0122] Finally, the different modules are connected to a third regulation module 300 such as that described in [Fig.5b].

[0123] This ventilation system has a ventilation capacity of 90,000 m³ / h in both extraction and supply modes. The combination of different modules allows for the installation of a ventilation system tailored to the specific needs of the building site. Furthermore, since each module is independent, once the dismantling operation is complete, the individual modules can be closed and then transported and / or stored for reuse at other sites.

[0124] In the case where the ventilation system only has two air extraction modules each associated with a filtration module and two air supply modules, the ventilation capacity is 60000 m3 / h.

[0125] The system is therefore modular and can be adapted to the needs of each dismantling site.

Claims

1. Demands Modular ventilation system (800, 1000) for a building (900), comprising: - at least one first extraction module (100) comprising a first box (102) and at least one air extraction unit (110) disposed inside the first box, the first box (102) comprising at least one first door (104) allowing an operator to move between the outside and inside of the first box, at least one first air inlet opening (106) and at least one first air outlet opening (108), the air extraction unit (110) being adapted to draw air from outside the first box via the first air inlet opening and to inject the drawn air towards the first air outlet opening, and - at least one second filtration module (200) comprising a second box (202) and at least one air filtration unit (210) disposed inside the second box (202), the second box comprising a second door (204) allowing an operator to move between the outside and inside of the second box, a second air inlet opening (206) and a second air outlet opening (208), the air filtration unit (210) being suitable for filtering air coming from the second air inlet opening, the filtered air being discharged towards the second air outlet opening, The modular ventilation system (800, 1000) is configured to be able to selectively adopt a functional configuration in which the second air inlet (206) of the second unit (202) is connected to a room (902) to be ventilated in the building (900), and in which the second air outlet (208) of the second unit (202) is connected to the first air inlet (106) of the first unit (102) so as to extract air from the room in the building by the extraction unit (110) via the filtration unit (210), so that the air is filtered by the filtration unit before being extracted by the extraction unit through the first air outlet (106), and a storage and / or transport configuration in which the second filtration module (200) is disconnected from the building (900), and in which the first module The extraction module (100) and the second filtration module (200) are disconnected from each other.so that the first extraction module (100) and the second, filtration modules (200) can be stored and / or transported independently of each other.

2. System (800, 1000) according to claim 1, wherein the first extraction module (100) has an extraction capacity of 5000 to 35,000 m3 / h of air.

3. System (800, 1000) according to any one of claims 1 and 2, comprising a plurality of first extraction modules (100) and a plurality of second filtration modules (200), each second filtration module being suitable for connection to a respective first extraction module.

4. A system (800, 1000) according to any one of claims 1 to 3, further comprising: - at least one third control module (300), comprising a third housing (302) and at least one third control unit (310) disposed inside the third housing (302), the third housing comprising a third door (304) allowing an operator to move between the outside and inside of the third housing, and wherein the third control module (300) is suitable, in the functional configuration of the system, for being electrically connected to each first extraction module (100) and / or each second filtration module (200) to allow the control unit (310) to control the extraction unit (110) and / or the filtration unit (210), and in the storage and / or transport configuration, for being disconnected from the other modules, so as to be able to be stored and / or transported independently of the other modules.

5. System (800, 1000) according to any one of claims 1 to 4, further comprising: - a suitable exhaust stack (700) which, in the functional configuration of the system, is to be connected to the first air outlet opening (108) of each first extraction module (100) in order to evacuate the air filtered by the filtration unit (200) and then extracted by the first extraction module (100), and, in the storage and / or transport configuration, is to be disconnected from the first modules, so as to be able to be stored and / or transported independently of the other modules.

6. System (800, 1000) according to claim 5, further comprising: - at least one fourth monitoring module (400) comprising a fourth housing (402) and at least one analysis and detection unit (410) disposed inside the fourth housing (402), the fourth casing (400) comprising a fourth door (404) allowing an operator to move between the outside and inside of the fourth casing, and in which the fourth monitoring module (400) is suitable, in the functional configuration of the system, to be connected to the exhaust stack (600), to allow the analysis and detection unit (410) to analyze the air evacuated via the exhaust stack (600), and in the storage and / or transport configuration, to be disconnected from the exhaust stack so that it can be stored and / or transported independently of the other modules and the exhaust stack.

7. A system (800, 1000) according to any one of claims 1 to 6, further comprising: - at least one fifth air supply module (500) comprising a fifth casing (502) and at least one blower unit (510) disposed inside the fifth casing (502), the fifth casing (502) comprising a fifth door (504) allowing an operator to move between the outside and inside of the fifth casing, a fifth air inlet opening (506) and a fifth air outlet opening (508), and wherein the fifth air supply module (500) is suitable, in the functional configuration of the system, for being connected to the building (900) to allow the blower unit (510) to draw air from outside the building via the fifth air inlet opening (506) and to blow the air drawn into the building via the fifth air outlet opening (508), and in the storage and / or transport configuration,to be disconnected from the building, so that it can be stored and / or transported independently of the other modules.

8. System (800, 1000) according to claim 7, wherein the fifth air blowing module (500) has a blowing capacity ranging from 5000 to 35,000 m3 / h.

9. System (800, 1000) according to claim 7 or 8, further comprising an air handling unit (520) comprising a device for heating and / or a device for cooling the air taken in before blowing it into the building.

10. System (800, 1000) according to claim 9, further comprising at least one sixth refrigeration module (600) comprising a refrigeration box a gorific in which a refrigeration unit (610) is disposed and which is suitable, in the functional configuration of the system, to be connected to the air handling unit (520) of the fifth air blowing module (500), so that the air handling unit (520) can cool the air taken by the blowing unit (510) by means of the cooling device, and in the storage and / or transport configuration, to be disconnected from the fifth blowing module, so that it can be stored and / or transported independently of the other modules.

11.

12. System (800, 1000) according to any one of claims 7 and 10, comprising several fifth air blowing modules (500). System (800, 1000) according to claims 10 and 11 in combination, comprising several sixth refrigeration modules (600), each refrigeration module being suitable for connection to the air handling unit (510) of a respective fifth air blowing module (500).

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