EP2275747A2 - Dispositif et procédé de récupération de chaleur à partir de liquides survenant de manière discontinue et chargés de matières en suspension - Google Patents

Dispositif et procédé de récupération de chaleur à partir de liquides survenant de manière discontinue et chargés de matières en suspension Download PDF

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Publication number
EP2275747A2
EP2275747A2 EP20100005546 EP10005546A EP2275747A2 EP 2275747 A2 EP2275747 A2 EP 2275747A2 EP 20100005546 EP20100005546 EP 20100005546 EP 10005546 A EP10005546 A EP 10005546A EP 2275747 A2 EP2275747 A2 EP 2275747A2
Authority
EP
European Patent Office
Prior art keywords
outlet
filter
heat
temperature
heat carrier
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Withdrawn
Application number
EP20100005546
Other languages
German (de)
English (en)
Other versions
EP2275747A3 (fr
Inventor
Erhardt Wächter
Ernst Bärenstecher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAU WERK STADT GMBH
Original Assignee
Bau Werk Stadt GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bau Werk Stadt GmbH filed Critical Bau Werk Stadt GmbH
Publication of EP2275747A2 publication Critical patent/EP2275747A2/fr
Publication of EP2275747A3 publication Critical patent/EP2275747A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F24D3/00—Hot-water central heating systems
    • 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

Definitions

  • Another difficulty in using the waste heat contained in the waste water is that wastewater occurs only temporarily and not continuously, so that the utilization of a device for heat recovery is relatively low and thus a particularly simple design is required to allow economic heat recovery.
  • a heat recovery system for wastewater from residential buildings is from the DE 26 25 157 A1 known.
  • a container is described, which has an inlet through which the waste water flows into the container, and a first outlet and a second outlet, via which the wastewater is discharged from the container. If the temperature of the waste water is insufficient for heat recovery, the waste water is discharged from the tank via the first drain.
  • the wastewater If the wastewater has a sufficiently high temperature, then it is discharged via the second outlet from the container and flows around a arranged in the container heat exchanger.
  • the thermal inertia of this device is relatively large because the container is permanently filled with wastewater and this cools over time by the release of heat to the second medium and / or the environment. Now, when warm waste water flows into this container, it must first displace the relatively cool wastewater located in the container, heat the container and the heat exchanger before heat transfer from the waste water to the second heat carrier can begin.
  • the invention has for its object to provide a device and a method for heat recovery from discontinuously and differently tempered and / or suspended with suspended solids liquids, which overcome the disadvantages mentioned in the prior art and in particular a simple operation, without regular manual cleaning of the heat-transferring Allow surfaces.
  • the device according to the invention and the method according to the invention should be easy to use and inexpensive to produce.
  • a device for heat recovery from suspended solids containing liquids comprising an inlet, a first outlet and a second outlet, wherein the second outlet is closable by means of a shut-off, achieved in that between the inlet and the second outlet a filter is arranged.
  • the arrangement of the filter according to the invention between the inlet and the second outlet makes it possible to remove the cleaned wastewater, which is referred to below as the first heat carrier, after the filtration according to the invention without larger particles of dirt via the second sequence again from the container.
  • This inventively filtered first heat transfer medium can now flow in a conventional manner into a heat exchanger, for example in a hot water storage tank, where it heats the water present in the hot water storage tank, which is also referred to below as the second heat transfer medium.
  • this heat exchanger it is advisable to arrange this heat exchanger as far down in the hot water tank, since due to the temperature stratification in the lower part of the hot water tank, the second heat carrier has a relatively low temperature and thus the coupling of waste heat from the first heat carrier is the most efficient possible.
  • the first heat transfer medium was usually used for cleaning purposes, it is mixed with detergent, detergent and / or soap, which provide for an automatic cleaning of all located with the first heat transfer surfaces of the lines and the heat exchanger, so that clogging of the Heat exchanger and the so-called fouling does not occur.
  • this wastewater is used to clean the filter by rinsing the suspended solids and solid impurities deposited on the filter surface and flooding into the first outlet , This will permanently set the filter before the Keep clogged, so that usually a maintenance-free operation over many years is possible.
  • the filter is arranged in a filter housing, which connects the inlet and the first outlet.
  • a bottom of a filter housing is provided below the filter from which the second sequence branches off.
  • the inclination of the filter which is indeed arranged between inlet and first outlet and / or the height difference between inlet and first outlet is inclined in a preferred embodiment of the invention, very flat with respect to the horizontal, preferably with an inclination angle of less than 10 ° and particularly preferred , less than 5 °.
  • This ensures that the waste water flows slowly over the filter when the second drain is closed, causing the solid impurities deposited on the filter surface to float because the water level is now above the filter and together with the waste water be slowly drained into the first drain.
  • the device according to the invention is very low maintenance and can therefore be operated particularly economically.
  • a shut-off device such as a check valve or a controllable directional control valve, a water level sensor and / or a pump is provided in the second sequence.
  • a shut-off device such as a check valve or a controllable directional control valve, a water level sensor and / or a pump is provided in the second sequence.
  • the pump and / or the obturator By suitably controlling the pump and / or the obturator, it can be ensured that only sufficiently warm wastewater is led out of the container through the second outlet and is fed to a heat exchanger for the subsequent use of waste heat. Furthermore, it can be ensured by active activation of the obturator that the filter in the container is cleaned sufficiently often and therefore does not clog.
  • the water level sensor serves to prevent the pump from running dry, which, as is generally known, can cause damage to the pump.
  • closing the obturator prevents the second drain from draining, thus minimizing the amount of wastewater required to clean the filter.
  • a first temperature sensor can be provided in the filter housing, in the inlet and / or in the upper part of the second outlet, so that, depending on the temperature of the waste water flowing into the container, this can either be used for waste heat recovery or used to clean the filter surface ,
  • FIG. 1 is greatly simplified a multi-storey residential building 1 shown in the various water consumers, namely a hand basin 3, a bath 5, a shower 7, a sink 9, a dishwasher 11, a washing machine 13 and a toilet 15 are shown.
  • a heating system with a burner 17 and designed as a stratified tank hot water tank 19 shown.
  • the heating network of this building is not shown for reasons of simplicity and clarity.
  • the boiler 17 is thermally coupled via a arranged in the upper part of the hot water tank 19 first heat exchanger 21 to the hot water tank 19.
  • a second heat exchanger 23 is arranged, which is usually used for the coupling of solar heat.
  • the second heat exchanger 23 is connected with its flow line VL to a device according to the invention for heat recovery 25. More specifically, the flow line VL is connected to a second outlet 27 of the heat recovery device 25 according to the invention.
  • the second heat exchanger 23 is connected to the sewer system (without reference numeral). This means that the waste water, after it has given up its heat in the second heat exchanger 23, is discharged into the sewer.
  • FIG. 1 As can be seen, all effluents from the heat consumers 3 to 13 are collected in a common sewage pipe 29, which opens into an inlet 31 of the device 25.
  • the device 25 according to the invention also has a first outlet 33, which is connected to the sewer system (without reference numerals).
  • the toilets 15 are not connected via the sewer pipe 29 with the device 25 according to the invention, but from the toilets originating effluents are discharged directly into the sewage system.
  • FIGS. 2 and 3 the device 25 according to the invention is shown in two different operating states and described on the basis of these representations their operation.
  • the same components are provided with the same reference numerals and it is the case with respect to the other figures said accordingly.
  • FIG. 2 how out FIG. 2 can be seen, the inlet 31 and the first outlet 33 via a filter housing 35 are interconnected.
  • the second drain 27 is connected to a bottom 37 of the filter housing 35.
  • a filter 39 is arranged, so that only filtered wastewater can flow through the second outlet 27.
  • the filter 39 may be formed, for example, as a wire mesh, as a perforated plate or as a conventional filter fabric made of metal or plastic. Also, nano coatings to prevent buildup can be helpful.
  • the bottom 37 of the channel 35 is only slightly or not at all inclined relative to a horizontal 41 in such a way that the bottom 37 decreases with increasing distance from the inlet 31.
  • the height difference between inlet 31 and first outlet 33 is relatively low, if at all, so that a low flow velocity sets when wastewater flows from inlet 31 into first outlet 33 ( Fig. 2 ).
  • This low inclination of about 4 ° relative to the horizontal 41 ensures that wastewater slowly flow through the filter housing 35 and thereby possibly contained in the wastewater impurities over the entire Surface of the filter 39 can be deposited.
  • the filter 39 has a large area relative to the amount of wastewater generated, so that it causes only a small pressure loss and secondly has a large filter capacity.
  • a shut-off device 43 in the second outlet 27 is opened and / or a pump 45 is activated, so that the warm waste water, after it has been cleaned in the filter 39 of solid impurities and suspended solids, via the second drain 27 and the flow line VL in the second heat exchanger 23 of the hot water tank 19 flows.
  • the temperature t1 of the waste water is higher than the temperature t2 of the second heat carrier in the lower part of the hot water tank 19, as required.
  • any known from the prior art valve can be used. Also check valves can be used.
  • the course of the flow line VL has an influence on the usually undesirable backflow of the wastewater.
  • FIGS. 2 and 3 is a block diagram of a 2/2-way valve representative of the variety of possible designs drawn.
  • pump 45 any type of pump available on the market can also be used.
  • the obturator 43 is disposed downstream of the pump 45 in the flow direction; However, this does not always have to be the case.
  • a water level sensor 47 is arranged in the second outlet 27, which, like the temperature sensors TS1 and TS2 and the obturator 43 and the pump 45, is connected via signal lines to a control unit 49. If now no more wastewater flows through the inlet 31 into the filter housing 35, the water level in the filter housing 35 drops. This is detected by the water level sensor 47 and as a result, the obturator 43 is closed and the pump 45 is turned off.
  • the obturator 43 and the pump 45 are shown as separate components. However, it is also possible to integrate the two functions in a pump, or there are pump designs that can take over the function of the obturator 43 at standstill. These variants are part of the invention, is claimed for the protection.
  • FIG. 3 the case is shown in which the temperature t2 in the hot water tank 19 is greater than the temperature t1 of the waste water entering the apparatus according to the invention 25.
  • the Control unit 49 closes the obturator 43 in the second sequence 27 closes or leaves and leaves the pump 45 turns off or turned off.
  • the wastewater flows out of the filter housing 35 or the device 25 via the first outlet 33.
  • the filter 39 is slowly washed over by wastewater even at low wastewater volumes.
  • the impurities which have previously deposited on the filter 39, float and are discharged via the first outlet 33.
  • it always takes place a cleaning of the filter 39, when waste water flows into the filter housing 35, which has no sufficient temperature to waste heat in the hot water tank 19 (see FIG. 1 ).
  • the wastewater is always used for waste heat recovery when the temperature is sufficient. If the temperature of the wastewater is insufficient, then this wastewater is used to clean the filter 39 and to discharge the contaminants deposited on the filter 39 via the first drain 33 into the sewer.
  • the obturator 43 is closed and the pump 45 is stopped.
  • FIG. 4 is a flowchart of a Embodiment of a method according to the invention shown.
  • the temperature t1 of the first temperature sensor TS1 in the device 25 or the filter housing 35 and the temperature t2 in the hot water storage 19 are queried in a first function block 61.
  • the temperatures t1 and t2 are compared with each other. If the temperature t1 is less than the temperature t2, waste heat recovery is not possible and, as a result, the obturator 43 will remain closed and the pump 45 will be deactivated.
  • These corresponding control commands are output by the control unit 49, which is indicated by corresponding arrows on a second function block 65.
  • the obturator 43 is opened and the pump 45 is activated. This is done in a third function block 67. Thereafter, the program jumps again before the first function block 61.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
EP10005546A 2009-06-19 2010-05-28 Dispositif et procédé de récupération de chaleur à partir de liquides survenant de manière discontinue et chargés de matières en suspension Withdrawn EP2275747A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009025503A DE102009025503A1 (de) 2009-06-19 2009-06-19 Vorrichtung und Verfahren zur Wärmerückgewinnung aus diskontinuierlich anfallenden und mit Schwebstoffen beladenen Flüssigkeiten

Publications (2)

Publication Number Publication Date
EP2275747A2 true EP2275747A2 (fr) 2011-01-19
EP2275747A3 EP2275747A3 (fr) 2012-03-14

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EP10005546A Withdrawn EP2275747A3 (fr) 2009-06-19 2010-05-28 Dispositif et procédé de récupération de chaleur à partir de liquides survenant de manière discontinue et chargés de matières en suspension

Country Status (2)

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EP (1) EP2275747A3 (fr)
DE (1) DE102009025503A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574853A1 (fr) * 2011-09-28 2013-04-03 E.qua Services GmbH Procédé et dispositif de production d'énergie thermique à partir d'eaux usées s'écoulant dans des canaux d'eaux usées ainsi que dans des conduites d'eaux usées
FR3017192A1 (fr) * 2014-02-06 2015-08-07 France Air Installation de production d'eau chaude et procede de pilotage d'une telle installation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100026192A1 (it) * 2021-10-13 2023-04-13 I&M Tech Ltd “Sistema di recupero energetico”

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625157A1 (de) 1976-06-04 1977-12-08 Bogner Und Huber Gmbh & Co San Abwasserwaerme-rueckgewinnungsanlage

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538168C3 (de) * 1975-08-27 1979-11-08 Hugo Peter 1000 Berlin Scholz Wärmetauscher zur Aufheizung von Kaltwasser
DE3246586A1 (de) * 1982-12-16 1984-08-30 Vogelsang, Herbert, 3000 Hannover Verfahren und vorrichtung zur rueckgewinnung der in abwaessern enthaltenen waerme
DE3433638C1 (de) * 1984-09-13 1986-04-17 Ulrich Dipl.-Ing. 2054 Geesthacht Klüe Waermeaustauscher zum UEbertragen von Waerme aus Abwasser
DE3715019A1 (de) * 1987-05-06 1988-11-17 Geiger Maschf Helmut Vorrichtung zur trennung von feststoffen aus fluessigkeiten
DE3809888A1 (de) * 1988-03-24 1989-10-05 Verein Zur Foerderung Des Entw Vorrichtung zur waermerueckgewinnung aus grauwasser
DE4126791C2 (de) * 1991-08-14 1993-10-21 Klaus Seib Einrichtung zur Wärmerückgewinnung aus warmem Haushaltsabwasser
AT400268B (de) * 1991-10-04 1995-11-27 Bartl Egmont Anlage zur rückgewinnung von wärme aus abwasser
DE102007013296B9 (de) * 2007-03-16 2021-10-14 Huber Se Anordnung und Verfahren zur Rückgewinnung von Wärmeenergie aus Abwässern

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625157A1 (de) 1976-06-04 1977-12-08 Bogner Und Huber Gmbh & Co San Abwasserwaerme-rueckgewinnungsanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574853A1 (fr) * 2011-09-28 2013-04-03 E.qua Services GmbH Procédé et dispositif de production d'énergie thermique à partir d'eaux usées s'écoulant dans des canaux d'eaux usées ainsi que dans des conduites d'eaux usées
FR3017192A1 (fr) * 2014-02-06 2015-08-07 France Air Installation de production d'eau chaude et procede de pilotage d'une telle installation

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Publication number Publication date
DE102009025503A1 (de) 2010-12-30
EP2275747A3 (fr) 2012-03-14

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