WO2015166423A1 - Method for managing hot water flows and for storing heat in a factory, and wastewater treatment plant implementing said method - Google Patents
Method for managing hot water flows and for storing heat in a factory, and wastewater treatment plant implementing said method Download PDFInfo
- Publication number
- WO2015166423A1 WO2015166423A1 PCT/IB2015/053102 IB2015053102W WO2015166423A1 WO 2015166423 A1 WO2015166423 A1 WO 2015166423A1 IB 2015053102 W IB2015053102 W IB 2015053102W WO 2015166423 A1 WO2015166423 A1 WO 2015166423A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hot water
- accumulator
- temperature
- heat
- water
- Prior art date
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Classifications
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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
- F24D17/00—Domestic hot-water supply systems
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
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- 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
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D20/0039—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material with stratification of the heat storage material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/04—Gas or oil fired boiler
-
- 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
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
-
- 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
- Y02B10/20—Solar thermal
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Definitions
- the invention relates to a method for operating and managing the flow of water. hot water produced and used by thermal processes, in a municipal and industrial wastewater treatment plant or a plant, by equipment producing and / or consuming hot water for a process or heating use.
- the invention relates more particularly, but not exclusively, to such a method for the management of hot water flows of a wastewater treatment plant.
- various equipment can produce hot water, including residual heat.
- the biogas produced in a treatment plant can also be used to supply a heat engine whose cooling water leaves the engine at a temperature which is generally higher than 90 ° C.
- These same hot water producing equipment are fed back to a lower water temperature than the initial one, the temperature difference varies according to the use of the dissipated heat.
- the cooling water entering the engine may be at a temperature of the order of 70 ° C, as well as the water introduced into the boiler.
- Other equipment may produce hot water at a temperature below 90 ° C but sufficient for medium and low temperature thermal uses, particularly at around 50 ° C for various applications such as office heating, water production sanitary hot water supply, digesters and sludge dryers, heating power for greenhouses.
- the aim of the invention is, above all, to provide a method that makes it possible to exploit the best possible and, as a priority, the heat produced and recovered on process and renewable energy (RE) equipment at a plant or station, including factories or stations that include hot-water generation equipment at a wide range of temperatures and hot water consuming equipment at very varied temperatures, including a sewage treatment plant, or an energy recovery plant waste.
- RE renewable energy
- the method for operating and managing heat flow in the form of hot water produced and / or consumed in a station or a plant, by equipment producing and / or consuming hot water is characterized in that :
- the produced hot water streams are collected in a common hot water accumulator of sufficient height to form stratified layers of water at a decreasing temperature from a temperature of at least about 90 ° C, preferably 95 ° C, in the upper part up to about 40 ° C in the lower part,
- Hot water withdrawals for different consumer equipment are provided at different levels of the accumulator whose temperatures substantially correspond to those desired for supplying hot water to consumer equipment,
- valves are provided at least on racking, to ensure the management and thermal balance of the heat flow into and out of the accumulator, and smooth the variations in inputs and heat requirements.
- At least part of the hot water supplied by the boiler is introduced in part high of the hot water accumulator.
- the height of the accumulator is at least 4 m; the height is preferably greater than the diameter of the heat storage tank.
- the hot water supply of the accumulator can also be provided from equipment producing hot water at a temperature below 90 ° C, but above 50 ° C, this supply being carried out at a level corresponding to a layer of water from the temperature accumulator substantially equal to that of the feed water.
- equipment may be constituted by at least one heat pump providing hot water output, especially greater than 50 ° C, and / or at least one solar thermal panel providing hot water output, especially at 80 ° C. ° C, and / or at least one heat exchanger installed at the outlet of an air booster providing at the outlet of the hot water, in particular greater than 50 ° C and / or at least one sludge dryer providing at the outlet of water at a temperature of about 55 ° C, and / or at least one digester.
- control valves are controlled by a control system comprising a computer or a controller in which is installed management software and collection of parameter measurements including: temperature, flow, heat count, the control system being connected to sensors arranged in multiple locations on the hot water supplies and also arranged over the entire height of the heat storage tank, and to a mini-weather station, the control system actuating the valves and recovery equipment of energy to manage all the heat flows connected to the accumulator, in particular the position and the opening of the water intake valves as a function of the level of heat load, and to determine the possible heat gain by a heat pump or other heat source.
- a control system comprising a computer or a controller in which is installed management software and collection of parameter measurements including: temperature, flow, heat count
- the control system being connected to sensors arranged in multiple locations on the hot water supplies and also arranged over the entire height of the heat storage tank, and to a mini-weather station, the control system actuating the valves and recovery equipment of energy to manage all the heat flows connected to the accumulator, in particular the position
- the invention also relates to a wastewater treatment plant comprising producer equipment and hot water consuming equipment at temperatures that can vary from one equipment to another, characterized in that it comprises:
- connection for each equipment producing hot water, to a level of the accumulator corresponding to a temperature substantially equal to that of the flow introduced by the connection,
- control valves provided at least on the withdrawal lines and a control system for these valves to ensure the management and the hydraulic balance of heat flows into and out of the accumulator, and to smooth the variations of the contributions and the needs in heat.
- the height of the accumulator is at least 4 m. Indeed, such a height makes it possible to have in the accumulator a stratification of temperature (or number of temperature levels) sufficient to correspond to the different temperature levels of the producer and consumer equipment of the station or plant.
- the maximum height of the accumulator is typically 10 to 15 meters, so as not to exceed a pressure of the order of 0.10 to 0.15 MPa at the bottom of the accumulator.
- the height of the accumulator is between 4 and 15 meters, preferably between 6 and 12 meters, preferably between 8 and 10 meters.
- the accumulator is of a height greater than the diameter of the accumulator.
- the height to diameter ratio of the accumulator is greater than 1, preferably greater than 1, 15 or 1, 2, or 1, 4 or 1, 5, and generally less than 2.
- the dimensions of the accumulators depend on the size of the plant or plant, and are subject to the economic design limitations of overhead hot water storage and ground availability.
- Typical examples of accumulators are:
- Sufficient height combined with a suitable height-to-diameter ratio of the accumulator allows both a temperature stratification adapted to the production and hot water consumption of the station or plant, and an optimal thermal load of the accumulator, with a reasonable footprint.
- the station may comprise as hot water generating equipment, at least one boiler supplying hot water outlet, especially at a temperature above 90 ° C, and / or at least one heat engine providing water outlet particularly at a temperature above 90 ° C, and / or at least one heat pump providing at the outlet of hot water, especially at a temperature above 50 ° C and / or at least one solar thermal panel providing leaving the hot water, in particular at 80 ° C., and / or at least one booster providing at the outlet of hot water, especially at 50 ° C, and / or as equipment producing and / or consuming hot water, at least one sludge dryer providing at the outlet of the water at a temperature of approximately 55 ° C, and / or at least one digester.
- at least one boiler supplying hot water outlet, especially at a temperature above 90 ° C, and / or at least one heat engine providing water outlet particularly at a temperature above 90 ° C, and / or at least one heat pump providing at the outlet of hot water, especially at a temperature above 50 °
- the plant or plant may include, as hot water generating equipment, at least one turbine and / or at least one cogeneration engine.
- Fig.1 single figure, is a diagram illustrating the implementation of the method of the invention in a wastewater treatment plant.
- the station comprises a boiler 1, in particular for burning gases emitted by the station, in particular biogas coming from at least one digester 2.
- the water inlet to the boiler 1 is provided by a pipe 1 e provided with a valve.
- the water entering the boiler 1 can be at a temperature of 70 ° C.
- An outlet pipe 1s is connected to the boiler 1 to supply hot water at a temperature of about 100 ° C.
- the station may also include at least one heat engine 3, operating particularly biogas produced by a digester.
- the engine 3 comprises a water cooling circuit with an inlet pipe 3e and an outlet pipe 3s of the heated water.
- the inlet pipe 3e is provided with a valve and the temperature of the cooling water can be of the order of 70 ° C at the inlet of the engine 3.
- the temperature of the water leaving the pipe 3s may be of the order of 95 ° C.
- the pipe 3s and the pipe 1s join to form a pipe 4 connected to the inlet of a balance feeder 5.
- the outlet of the nanny 5 is connected by a pipe 6 to the upper part of a storage battery.
- a flow meter 8 is installed on the pipe 6, and a pump 9 for circulating the hot water.
- the accumulator 7 may have a cylindrical shape with a flat base and a dome-shaped upper end provided with a vent 7a.
- the upper level of the water in the reservoir 7 corresponds to the base of the dome so that a gaseous sky 10 is present above the water contained in the accumulator 7.
- This accumulator 7, common to various equipment of the installation, is of sufficient height, in particular from 4 m to 10 m, for the formation of naturally stratified layers of water at a decreasing temperature from a temperature of at least about 90 ° C and preferably at least 95 ° C at the top, up to about 40 ° C at the bottom.
- the height of the accumulator 7 is greater than its diameter.
- the water supply of the boiler 1 and the engine 3 is ensured by a pipe 1 1 connected at the bottom of the accumulator 7 and equipped with an equilibrium feeder 12, and a flowmeter 13 downstream of the 12 and upstream of the 3rd pipe connection.
- a solenoid valve Va is installed on the line 1 1 at the outlet of the accumulator 7.
- the withdrawals 14 and 15 are provided with solenoid valves, respectively Vb, Vc, whose outputs are connected to a common pipe 16 joining the pipe 1 1 downstream of the valve Va. It is thus possible to raise the temperature of the water of the pipe 1 1 by means of withdrawals via the lines 14 and 15.
- the water supplied to the pipes 1 e and 3e can be at a temperature of 70 ° C. about.
- the digester 2, or each digester, is fed by a pipe 17e in hot water at a temperature of about 90 ° C.
- the pipe 17e is connected to an outlet of an equilibrium feeder 18 and is equipped with a flow meter 19.
- the inlet of the nurse 18 is connected by a pipe 20 and a solenoid valve Vd to the upper part of the accumulator 7 for a withdrawal of water at a temperature of at least 90 ° C, in particular about 95 ° C.
- a pump 21 installed on the pipe 20 ensures the circulation of water.
- Another outlet of the feeder 18 is connected by a pipe 22 to another heat-consuming equipment in the form of hot water at a temperature of about 90 ° C., especially a low temperature sludge dryer.
- the pipe 22 is equipped with a flow meter 24.
- a pipe 17s is connected to an outlet of the digester 2 for discharging water at a temperature lower than that entering the pipe 17e.
- the temperature of the water leaving the line 17s can be about 70 ° C.
- the pipe 17s is connected to an inlet of an equilibrium nurse 25.
- Another inlet of this nanny 25 is connected by a pipe 23s to an outlet of the dryer 23 which delivers water at a temperature close to that of the exit 17s, in particular about 70 ° C.
- Another pipe 23s1 is connected to another outlet of the dryer 23 through which the water of the condensation circuit of the steam of the dryer at a temperature significantly lower than that of the feed water of the dryer 22, in particular at a temperature of about 50 ° C.
- This recovery of the heat of condensation of the steam of the drier can supply a low-temperature heat network 31.
- the pipe 23s1 is connected to a heat exchanger 26 which supplies heat to the low temperature network when the dryer is stopped, and which receives, on a hot fluid inlet, water from the nurse 25 connected to the hydro heat accumulator by a pipe 27 on which is installed a circulation pump 28 and a flow meter 29.
- the water flowing through the pipe 27 is at a temperature of about 70 ° C.
- a return pipe of the exchanger 26 recovers water at a temperature of about 55 ° C., which is introduced into the lower part of the accumulator 7 at the level of a stratified layer of this accumulator having substantially the same temperature. than the return water from line 30.
- a pipe 31 of the low temperature heat network is connected to another outlet of the exchanger 26 for directing water, at a temperature of the order of 48 ° C, by a branch 31a to offices or premises dwelling 32 for heating and / or hot water production.
- Another branch branch 31b directs the water to a user 33, including one or more vegetable greenhouses.
- the cooled water from the desks 32 and greenhouses 33 is brought back by two branches 34a, 34b of a line 34 to a low temperature inlet of the sludge dryer 23, at a temperature of about 38 ° C.
- a pipe 35 is connected to the outlet of the nanny 25.
- the upper end of the pipe 35 is connected by a branch provided with a solenoid valve Ve to the accumulator 7, at a level corresponding to a layer whose temperature is substantially that of the outlet of the nanny 25, in particular of the order 70 ° C.
- Branches connected to the pipe 35, respectively provided with solenoid valves Vf and Vg, are connected to the accumulator 7 at lower levels corresponding to layers at lower temperatures. If the temperature of the different layers located at the lower connections is too steep, the introduction of water, through the valve Ve, at a temperature of approximately 70 ° C can make it possible to raise the temperature of the layer to a minimum. desired value.
- a pipe 17s1 is connected to a second outlet of the digester 2 for water leaving at a temperature of the order of 70 ° C.
- a pipe 23s2 is connected to an outlet of the dryer 23 delivering water to a temperature also of the order of 70 ° C.
- the two lines 17s1 and 23s2 join to form a single line 36 connected to an inlet of a balance feeder 37.
- a pipe 38 equipped with a flowmeter 39, is connected to another inlet of the nanny 37.
- the pipe 38 collects heated water from the air cooling circuit of a booster 40, via a pipe 40a. , as well as water heated by at least one solar thermal panel 41.
- the temperature of the water in line 40a from booster 40 may be about 60 ° C while the temperature in line 41a from solar panel 41 may be of the order of 80 ° C.
- a heat pump 42 may be provided to supply an outlet pipe 42a, connected to the pipe 38, a water heated to a temperature of about 60 ° C.
- the water circuit to be heated for respectively the exchanger of the booster 40, the solar panel 41 and the heat pump 42 comes from the accumulator 7, at a temperature of about 40 to 50 ° C, by a pipe 43 connected to the accumulator at the bottom, equipped with a circulation pump 44.
- the pipe 43 is connected to the inlet of an equilibrium nurse 45 whose output is connected by a pipe 46 to branches 46a, 46b, 46c provided with a valve for supplying the booster 40, the solar panel 41 and the heat pump 42 with water to be heated.
- An outlet of the equilibrium feeder 37 is connected by a pipe 47 to an inlet of the accumulator 7 in the lower part corresponding to a temperature of about 60 ° C for the layer of water in the accumulator.
- a control unit D is constituted by a control system comprising a computer or a controller in which is installed a software for managing and collecting all the measurements: temperature, flow, heat counting. This control system is connected to the different flow meters 8, 13, 19, 24, 29 and 39 to collect the measurements. The system D is further connected to T1-T6 temperature sensors provided at different heights in the accumulator 7 to provide the system D the temperature in the different layers of the accumulator.
- a mini weather station 48 is also connected to the control system D to provide weather forecasts and to anticipate the settings of the various valves whose opening or closing is controlled by the system D.
- the common accumulator 7 of hot water allows optimal management of resources.
- the hot water at the highest temperature of about 95 ° C is stored in the upper part of the accumulator and remains substantially at this temperature to be taken to ensure the heating of a unit such as the digester or the Dryer 23.
- the temperature of the water in the hydro accumulator of heat can vary in extreme values, ie in case of excess heat the temperature of 95 ° can be reached over almost the entire volume of water and in the case of significant deficit, the temperature of the water at 95 ° would be limited to the upper part of the hydro accumulator .
- the hot water accumulator 7 can provide a heat reserve of 90 MWh-th (megawatt hours) in a volume of about 1500 m 3 and a height of about 10 m.
- the accumulator 7, or hydro-accumulator, heat constitutes the energy core of the wastewater treatment plant. It ensures the management and the hydraulic balance of the incoming and outgoing heat flows, and allows the smoothing of the daily variations of the contributions and the needs in heat.
- the accumulator also makes it possible to operate discontinuously on certain equipment by managing the accumulated heat reserve.
- the control system D actuates the valves and the energy recovery equipment so as to manage all the heat flows connected to the accumulator 7, in particular the position and the opening of the water intake valves as a function of the thermal load level.
- the control system D determines the possible heat supplement to be supplied by the heat pump 42, and makes it possible to use, as a priority, the heat produced and recovered on the equipment of the treatment plant process and the heat coming from the energies.
- renewable renewables ENR solar thermal panels
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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BR112016025173A BR112016025173A2 (en) | 2014-04-30 | 2015-04-29 | method of managing hot water streams and heat storage in a wastewater purification plant and factory by implementing said method |
CN201580030041.8A CN106414338A (en) | 2014-04-30 | 2015-04-29 | Method for managing hot water flows and for storing heat in a factory, and wastewater treatment plant implementing said method |
EP15732339.5A EP3137818A1 (en) | 2014-04-30 | 2015-04-29 | Method for managing hot water flows and for storing heat in a factory, and wastewater treatment plant implementing said method |
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FRFR1453968 | 2014-04-30 | ||
FR2014053968 | 2014-04-30 |
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WO2015166423A1 true WO2015166423A1 (en) | 2015-11-05 |
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PCT/IB2015/053102 WO2015166423A1 (en) | 2014-04-30 | 2015-04-29 | Method for managing hot water flows and for storing heat in a factory, and wastewater treatment plant implementing said method |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109780909A (en) * | 2019-01-09 | 2019-05-21 | 青岛海尔空调器有限总公司 | The method of thermal energy is shared between more home station |
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2015
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EP0284602A1 (en) * | 1987-03-27 | 1988-09-28 | Waagner-Biro Aktiengesellschaft | Process and apparatus for ecologically beneficial and hygienic sludge treatment and disposal |
DE202006003612U1 (en) * | 2006-03-06 | 2006-07-06 | Ewers, Josef | Storage tank for holding of liquids has several optional tank connections distributed over surface in order to gain access to various temperature levels |
EP2072912A2 (en) * | 2007-12-17 | 2009-06-24 | Sunerg Solar S.R.L. | Combined storage tank |
EP2336700A2 (en) * | 2009-12-08 | 2011-06-22 | Siemens Aktiengesellschaft | Storage device and method for its operation |
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CN109780909A (en) * | 2019-01-09 | 2019-05-21 | 青岛海尔空调器有限总公司 | The method of thermal energy is shared between more home station |
CN109780909B (en) * | 2019-01-09 | 2021-03-16 | 青岛海尔空调器有限总公司 | Method for sharing heat energy among multiple family stations |
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