Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D11/00—Central heating systems using heat accumulated in storage masses
  • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
  • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
  • F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
  • F24D11/025—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in waste water
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D17/00—Domestic hot-water supply systems
  • F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D17/00—Domestic hot-water supply systems
  • F24D17/02—Domestic hot-water supply systems using heat pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
  • F28D7/0016—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0058—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having different orientations to each other or crossing the conduit for the other heat exchange medium
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D2200/00—Heat sources or energy sources
  • F24D2200/12—Heat pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
  • F24D2200/00—Heat sources or energy sources
  • F24D2200/16—Waste heat
  • F24D2200/20—Sewage water
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
  • F24H9/00—Details
  • F24H9/0005—Details for water heaters
  • F24H9/001—Guiding means
  • F24H9/0015—Guiding means in water channels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D21/0001—Recuperative heat exchangers
  • F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B10/00—Integration of renewable energy sources in buildings
  • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
  • Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
  • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
  • Y02B30/56—Heat recovery units

Definitions

• the present invention relates to a heating system with wastewater heat recovery, of the type comprising a heat pump, a wastewater holding tank comprising an envelope defining an internal volume for retaining wastewater, and a heat exchanger to recover calories in the holding tank and use them in the heat pump.
• FR-A-2,885,406 discloses a heating system with heat recovery of wastewater comprising a wastewater holding tank providing vertical thermal stratification of wastewater and a heat pump whose evaporator is integrated in the tank of retained, and receives wastewater from the hottest part of the wastewater from the holding tank. Nevertheless, the volume of the holding tank is important.
• An object of the invention is to provide a heating system with heat recovery wastewater whose footprint is low, while offering a high energy efficiency.
• the subject of the invention is a heating system of the aforementioned type, characterized in that the holding tank comprises at least one baffle extending in the holding volume and dividing the holding tank into a plurality of compartments. and defining with the envelope a route of flow of wastewater bypassing the baffles and passing through the compartments, the heat exchanger being arranged to recover calories in at least two compartments.
• the heating system according to the invention comprises one or more of the following characteristics, taken separately or in any technically possible combination:
• the at least one baffle comprises a free edge delimiting with the envelope a passage for the flow of wastewater;
• the holding tank comprises at least a first baffle and at least a second baffle arranged head to tail;
• the at least one baffle is horizontal or vertical
• the exchanger is formed in the at least one baffle comprising an inner conduit for circulating a heat transfer fluid
• the internal duct forms a circuit comprising several parallel sections and opposite traffic direction;
• the system comprises at least two baffles provided with internal conduits connected in series to form the exchanger; -
• the heat pump comprises an evaporator and a condenser connected by a primary circuit for the circulation of a refrigerant, and a secondary circuit for the circulation of a coolant, connecting the exchanger to the evaporator.
• the subject of the invention is also a heating installation comprising a wastewater source, a heating system with heat recovery of the wastewater and a heating application such as a central heating or domestic hot water circuit, the heating application being supplied with calories by the heating system, characterized in that the heating system is as defined above, the wastewater source being connected to an inlet of the holding tank.
• FIG. 1 is a diagram showing a heating system comprising a heating system with heat recovery of waste water, according to the invention
• Figure 2 is a vertical sectional side view of a wastewater holding tank and a heat exchanger of the heating system of Figure 1;
• Figure 3 is a partial side view of the holding tank of Figure
• FIG. 4 is a schematic vertical sectional view along the line IV-IV of Figure 2;
• - Figure 5 is a view similar to Figure 1 of a holding tank of a heating system according to a second embodiment of the invention;
• FIG. 6 is a schematic view illustrating a heat exchanger formed by several baffles internal to the holding tank of Figure 5;
• Figure 7 is a sectional view of one of the baffles of Figure 6;
• FIG. 8 is a view similar to Figures 2 and 5 of a holding tank of a heating system according to a third embodiment of the invention, the holding tank being provided with a settling tank;
• FIG. 9 is a schematic view of an exchanger formed by a horizontal baffle internal to the holding tank of Figure 8.
• Figure 1 illustrates an individual heating installation 2 comprising a heating system 4 with heat recovery of the waste water and a heating application 6 supplied with heat by the heating system 4.
• the heating application 6 is for example a radiator circuit, domestic hot water, a heated floor, or a hot air network.
• the heating installation 2 also comprises one or more sources 8 of warm wastewater, receiving wastewater from, for example, a shower, a washing machine, a dishwasher, a bath .
• the heating system 4 comprises a holding tank 10, supplied by the source 8, and a heat pump 12 using the heat supplied by the wastewater of the tank 10.
• the heating installation 2 also comprises a central control unit 7 controlling the heat pump 12 and the final application 6.
• the heat pump 12 conventionally comprises an evaporator 14, a compressor 16, a condenser 18 and an expander 20 connected in series by a primary circuit 22 of refrigerant.
• the holding tank 10 comprises an internal exchanger 26 and an external exchanger 28 connected in parallel to the evaporator 14 by a secondary circuit 30 for circulating a heat transfer fluid.
• the secondary circuit 30 comprises a pump 30A for circulating the heat transfer fluid, a bypass duct 30B of the exchangers 26 and 28 and a three-way valve 30C selectively closing the bypass duct 30B or exchangers 26 and 28.
• the secondary circuit 30 also comprises a control and regulation unit 3OD driving the three-way valve 3OC and the pump 30A, and a temperature sensor 30E of the coolant circulating in the secondary circuit 30.
• the control and regulation unit 3OD receives a temperature measurement signal supplied by the temperature sensor 3OE, and is connected to the central unit 7.
• the secondary circuit 30 is further connected to an expansion tank 30F.
• the tank 10 for retaining wastewater will now be described in more detail with reference to FIGS. 2 to 4.
• the tank 10 is emptied by overflow: the water enters the tank 10 and leaves it discharging through an outlet when the water level in the tank reaches that of the outlet.
• the tank 10 comprises an envelope 34 delimiting an internal volume 36 for retaining wastewater, a wastewater inlet 38 in the holding volume 36, and an outlet 40 for wastewater from the holding volume 36.
• the envelope 34 comprises a cylindrical wall 41 of horizontal axis, and two vertical walls 42 closing the cylindrical wall 41 at its respective ends.
• the holding volume 36 is delimited by the inner surface of the walls 41 and 42.
• the holding volume 36 has a length of between 1 m and 4 m, preferably between 1.4 m and 2.5 m, and a diameter of between 0.4 m and 2 m, preferably between 0.4 m and 1 m.
• the dimensions are chosen according to the final application 6.
• the wastewater inlet 38 and the wastewater outlet 40 are formed respectively in the opposite vertical walls 42, each through an orifice passing through the wall 42 and opening into the retaining volume 36.
• the inlet 38 and the outlet 40 are located in an upper part of the holding tank 10, at the same height.
• the height of the outlet 40 in the holding volume 36 defines the maximum level of wastewater in the holding volume 36 from which the wastewater overflows from the holding volume 36 through the outlet 40.
• the vessel 10 includes a plurality of deflection baffles 44 extending within the containment volume 36.
• the baffles 44 are arranged to modify the direct path of the water between the inlet 38 and the outlet 40, by imposing a sinuous path bypassing the baffles 44.
• the tank 10 comprises several baffles 44 regularly distributed along the axis of the tank 10.
• the baffles 44 divide the holding volume of the tank 10 into a plurality of compartments 46.
• Each baffle 44 forms in fact on both sides two compartments
• the tank has three baffles 44 defining four compartments 46.
• Each baffle 44 has a general shape of plate, more precisely of truncated disk. They each delimit a continuous surface.
• Each baffle 44 comprises an edge 48 of junction with the envelope 34, of complementary shape of the envelope 34, and a free edge 50 defining a flow passage 52 with the envelope 34.
• the edge 50 is horizontal.
• the flow passages 52 are located at a lower level than the waste water outlet 40.
• the baffles 44 are parallel to each other and are arranged head to tail alternately.
• the baffles 44 are vertical.
• the flow passages 52 are alternately formed in the bottom and in the upper part of the holding volume 36.
• one of the baffles 44 protrudes upwardly from the bottom of the casing 34 while two other baffles 44 are arranged on either side and extend projecting towards the From the top of the casing 34, the baffles 44 define, with the casing 34, a path for the flow of wastewater from the inlet 38 to and up to the outlet 40.
• the pathway passes successively in each compartment 46. It includes several changes in the direction of the flow of wastewater, to bypass the baffles 44. These changes of direction are, in the illustrated example, between
• the volume of the tank 10 is greater than 20 times the passage section per unit length of the inlet and outlet pipes, preferably greater than or equal to 40 times.
• this ratio is 45.
• the travel time of the wastewater along the path is therefore equivalent to the flow time of the wastewater in a passage section conduit identical to the inlet 38 and at exit 40, and whose length would be 45 times greater.
• the heat exchangers 26 and 28 are arranged to recover calories in the holding tank 10.
• the exchangers 26 and 28 are connected in parallel to the secondary circuit 30 and each have a manual flow control valve 58.
• the internal heat exchanger 26 comprises a plurality of ducts 60 extending inside the retaining volume 36. Each duct 60 passes successively through each of the compartments 46.
• the internal exchanger 26 is thus able to recover calories in each of the compartments defined by the baffles 44.
• the ducts 60 are connected in parallel. They are also arranged parallel to each other. Each duct 60 comprises two vertical sections 62 and a horizontal section 64 connecting the two vertical sections 62 at their lower ends. Each duct 60 thus forms a U.
• the horizontal section 64 extends in the bottom of the tank 10 over substantially the entire length of the tank 10.
• the horizontal section 64 extends into the flow passages 52 defined by the upper baffles 44 and passes through the baffle 44. lower.
• the external exchanger 28 comprises a helical duct 66 extending helically around the casing 34, over substantially the entire length of the casing 34.
• the external exchanger 28 is arranged in an insulating layer 68 surrounding the outer casing 34.
• the insulating layer 68 prevents the heat losses of the tank 10.
• the holding tank 10 further comprises two access hatches 72 formed respectively in the vertical walls 42 of the outer casing 34.
• the diameter of the access hatches 72 is large, of the order of half the diameter of the tank 10, for easy cleaning.
• the holding tank 10 is provided with a temperature sensor 73 and a water level sensor 74 connected to the central control unit.
• the heating system 2 is switched on by means of the central control unit 7.
• the central control unit 7 sends a start-up signal to the final application 6, to the heat pump 12 and to the control and regulation unit 3OD of the secondary circuit 30.
• the control and control unit 3OD controls the pump 3OA and the three-way valve 3OC according to the control signals provided by the central unit 7 and / or the temperature value supplied by the temperature sensor 3OE.
• control and regulation unit 3OD also controls the flow control valves 58 of the heat exchangers 26 and 28.
• the circulation of the coolant in the heat exchangers 26 and 28 heats the coolant.
• the coolant passes through the evaporator 14 by giving heat to the refrigerant. It cools in the condenser 18 providing heat to the final application 6.
• the central control unit 7 stops the installation if the temperature value supplied by the temperature sensor 73 of the tank 10 is too low and / or if the sensor of water level 74 detects a water level too low in the tank 10.
• the baffles 44 impose on wastewater a path of travel successively in several compartments 46 from which the heat exchangers 26 and 28 recover heat.
• the wastewater arriving through the inlet is forced to pass through each compartment 46, which ensures a significant recovery of the heat of these inlet waters by the exchangers 26 and 28.
• the energy efficiency of the installation 2 is high.
• the volume required for the holding tank 10 is small.
• the importance of the wastewater flow time around the baffles 44 ensures optimum recovery of their heat through the exchangers 26 and 28.
• the baffles 44 prevent vertical thermal stratification of the wastewater in which the hottest waters would be in the upper part of the tank 10, which would lead to a too rapid flow of the hottest waters.
• baffles 44 do not induce a risk of obstruction of the tank 10.
• the arrangement of the exchangers 26 and 28 provides a large surface of heat exchanger with the wastewater present in the holding tank 10.
• the emptying by overflow of the tank 10 limits the risk of obstruction of the tank 10. Indeed, the presence of a valve 10 at the outlet 40 is unnecessary.
• the tank is reliable.
• the heat pump 12 is removable without intervention on the holding tank 10, which facilitates assembly and maintenance of the installation 2.
• the heating system 2 is that of a building.
• Figures 5 to 7 illustrate a heating system 4 according to a second embodiment of the invention, of which only the differences with respect to the first embodiment will be described below.
• elements similar to the first embodiment are designated by like reference numerals.
• the heating system 4 according to the second embodiment differs essentially by the holding tank 10.
• the internal exchanger 26 and the external exchanger 28 have been replaced by a single exchanger 76 formed by the baffles 44 of the tank 10. Indeed, as shown in Figures 6 and 7, each baffle 44 defining an inner conduit 78 for circulating a heat transfer fluid.
• the internal duct 78 itself comprises baffles making it possible to impose a long path and a long circulation time on the heat-transfer fluid in the internal duct 78, favoring heat exchanges.
• each duct 78 of each baffle 44 is connected to the outlet of the adjacent baffle 44.
• the baffles 44 are thus connected in series to form the exchanger 76.
• the baffles 44 are attached in orifices 79 formed in the cylindrical wall 41 of the casing 34, and connected to one another outside the casing 34.
• baffles 44 has been increased.
• the number of baffles 44 is now such that the cross-section of the flow path of the wastewater between the baffles 44 is substantially constant in the tank 10.
• the exchange surface of exchanger 76 is very important.
• FIGS 8 and 9 illustrate a heating system 4 according to a third embodiment of the invention, in which only the differences with respect to the second embodiment of the invention will be described below.
• the identical reference elements designate analogous elements.
• the heating system 4 according to the third embodiment differs essentially from the heating system 4 according to the second embodiment in that the tank 10 comprises horizontal baffles imposing a sinuous path from the bottom of the tank 10 to the outlet 40 at the top of the tank 10 and in that the tank 10 comprises a tank 82 for decanting the wastewater.
• the horizontal baffles 44 have a complementary contour of the envelope 34. They thus have a rectangular general outline, which facilitates their manufacture.
• Some horizontal baffles 44 have an internal duct 78 and form the exchanger 76
• each horizontal baffle 44 forms the exchanger 76.
• the baffles 44 comprise a through orifice 80 forming a flow passage 52 for the wastewater.
• the settling tank 82 is disposed in the bottom of the tank 10. It is disposed on the side of the wastewater inlet 38.
• the settling tank 82 is convergent downwards, more precisely tapered downwards.
• the tank 82 has, at its lower end, a drain valve 84.
• the tank 14 comprises a vertical inlet baffle 86 imposing the wastewater entering the tank 10 to descend towards the bottom in the direction of the tank 82, before returning to the outlet 40 along the path defined by the horizontal baffles 44.
• the operation of the settling tank 82 is simple. To clean the tank 10, simply open the drain valve 84. The particles accumulated in the tank 82 are then discharged.
• the settling tank 82 facilitates maintenance operations.
• the arrangements of the reservoir 82 and the baffles 86 and 44 improve the guiding of the particles present in the wastewater towards the reservoir 82. These arrangements also limit the rise of particles.

Applications Claiming Priority (2)

Publications (1)

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ID=40527965

Family Applications (1)

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• 2008
  • 2008-09-05 FR FR0855980A patent/FR2935782B1/fr active Active
• 2009
  • 2009-09-07 CN CN2009801416825A patent/CN102203512A/zh active Pending
  • 2009-09-07 US US13/062,347 patent/US20110203303A1/en not_active Abandoned
  • 2009-09-07 AU AU2009289113A patent/AU2009289113A1/en not_active Abandoned
  • 2009-09-07 BR BRPI0913522A patent/BRPI0913522A2/pt not_active Application Discontinuation
  • 2009-09-07 CA CA2736146A patent/CA2736146A1/fr not_active Abandoned
  • 2009-09-07 JP JP2011525603A patent/JP2012502251A/ja active Pending
  • 2009-09-07 EP EP09741376A patent/EP2324295A2/fr not_active Withdrawn
  • 2009-09-07 RU RU2011112855/12A patent/RU2011112855A/ru not_active Application Discontinuation
  • 2009-09-07 WO PCT/FR2009/051679 patent/WO2010026352A2/fr active Application Filing
• 2011
  • 2011-03-03 IL IL211533A patent/IL211533A0/en unknown
  • 2011-03-04 MA MA33669A patent/MA32609B1/fr unknown
  • 2011-03-04 DO DO2011000069A patent/DOP2011000069A/es unknown

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