CA1130274A - Waste water tank - Google Patents
Waste water tankInfo
- Publication number
- CA1130274A CA1130274A CA345,703A CA345703A CA1130274A CA 1130274 A CA1130274 A CA 1130274A CA 345703 A CA345703 A CA 345703A CA 1130274 A CA1130274 A CA 1130274A
- Authority
- CA
- Canada
- Prior art keywords
- tank
- waste water
- inlet
- duct
- outlet
- 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.)
- Expired
Links
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
- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
-
- 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
-
- 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
- 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
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0069—Distributing arrangements; Fluid deflecting means
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/06—Derivation channels, e.g. bypass
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
m18.1.80 1 PHD.79-015 "ABSTRACT":
"Waste water tank".
In a waste water tank comprising inlet and outlet ducts which open into the bottom of the tank, the ducts are enlarged, at a short distance before the inlet and outlet apertures, and are interconnected by a parallel duct, so that the upwards and downwards forces prevail. It is thus achieved that no colder but only warmer water can penetrate into the tank.
"Waste water tank".
In a waste water tank comprising inlet and outlet ducts which open into the bottom of the tank, the ducts are enlarged, at a short distance before the inlet and outlet apertures, and are interconnected by a parallel duct, so that the upwards and downwards forces prevail. It is thus achieved that no colder but only warmer water can penetrate into the tank.
Description
~3~327~
",.;~
18.1.80 1 PI~D.79-015 "Waste water tank".
:,~
, ,~, .
, .; , The invention relates to a waste water tar~, comprising a heat exchanger, a waste water inlet duct ~~ which is constructed aa a fall pipe, and a waste water outlet duct which opens into the bottom of the tank and which extends upwards outside the tank at least as far as the maximum filling height of the tank.
Waste water -tanks of this kind serve to collect hot and cold waste water of a howse where the waste water o~ the toilets i~ separately discharged. These waste water 0 tanks comprise a heat exchanger which i8 used for pre-heating the warm water which is not inten~ed for consumption and/or which can serve as an evaporator of a heat pump.
In such a waste water tank which is known, ; for example, from "BBC Nachrichten", 1975, ~ol. 8/9, 5 pages l~97-502, warm and cold water are 'both supplied and discharged at the upper side. The already warm waste water in the tank is then mixed with colcl waste water, so that only a comparatively low mean temperature arises inthe tank. Mechanical presorting of cold ancl warm water by temperature rneasurement, comparison of the temperature of the inlet and the tank, and opening or closin~ of the inlet duct is not feasible in view of poor relia'bility (for example, contamination in the -waste water) and also because of the high costs.
French Patent Application 2,307,235 describes a waste water tank with an inlet and an outlet which both open at the top of the tank. ~n the tank itself there is provided a partition which is open at the lower side, so tha-t when waste water is admitted, the colder waste 30 water present at the bo-ttom of the reservoir is pushed away and discharged via the outlet . When the admi-tted waste water is warmer -than the waste water already present in' the tank, the mean tank temperature is at least llJOZ~4 1~.1.80 2 PHD.7~-015 maintained. However, when cold water is admitted, it is mixed with the waste water in the tank, so that the mean temperature in the tank decreases and hence also the heat content o~ the tank.
The invention has ~or its object to provide ~ a waste water tank reservoir in which the admittance of cold and warm water to the tank is controlled only by a difference in the density o~ the cold and the warm water.
In a was-te water tank of the described kind this object is achieved in accordance with the invention in that the lnlet duct for the waste water also opens into the bottom of the tank and in that the inlet and out:Let ducts change over, at a small distance before the :Lnlet and outlet apertures in the bottom of the tank, into parts having a passage which is at least four times larger than the passage of the inlet and outle-t ducts, these parts being connected to the inlet and outlet apertures via upwards extending ducts, being inter-; 20 connected by a parallel duct via downwards extending ducts.
As a result of the increased passage oP theinle-t duc-t, the flow rate o~ -the supplied waste water is reduced so that the upwards and downwards forces prevail. It is -thus achieved tha-t it is only because o~ the higher densi-ty that colder water cannot penetrate in-to the -tank but ~lows direc-tly -to -the outlet duct via the parallelduct. Only warmer water can reach the tank due to the difference indensity, so that always a maximum heat content is maintained. A waste water tank o~ -this kind can ba simply and inexpensively manufac-tured and its opera-tion is virtually trouble-free without requiring additional a~xiliary energy.
The passage of the parallel duct preferably corresponds to-~hat o~ the said parts.
In order to prevent incoming warm waste wa-ter ~rom being mixed with sornewhat colder waste water presen-t at the bottom o~ the tank~ the duct opening in-to the inlet ~L~3~2~L
, . , . , .. ~
18.1.80 3 P~D.79-015 aperture in -the bottom of the tar~ is extended with a pipe projecting in-to the tank.
,i! In order to prevent short-circuiting between - inlet aperture and outlet aperture inside the tar~ and to - ? 5 obtain a uniform displacement current, the inlet and outlet apertures inthe bottom of the tank are preferably spaced apart as far as possible. The inlet and outlet apertures in the bottom of the -tank are preferably situated near the ~ wall of the tank in two diagonally opposi-te locations.
d 10 In a preferred embodiment of the waste water tank in accordance with the invention, the heat exchanger is formed by a water reservoir which projects into the tank from the top, an inlet f`or cold water opening in-to the lower part of said reservoir.
Moreover, the waste water tank can also cooperate with a heat pump. In that case, the lower part of -the wall of the tank is preferably constructed as an evaporator of a heat pump or is connected thereto by way of a liquid cycle, -the upper part of the water reservoir which is 20 situated ou-tside the tank being constructed as a condenser of the heat pump or being connected -there-to by way of a liquid cycle.
Embodiments in accordance wi-th the invention will be described in dotail hereinafter withroference to 25 the accompanying diagramrrlatic drawing.
Figure 1 is a sectional view of a waste water tank with a heat exchanger, and Figure 2 is a sectional view of a waste water tank with a heat exchanger and a heat pump.
The waste wa-ter tar~ shown in Figure 1 comprises a tank 1 of~ for example, metal or a synthetic material.
An inlet duct 3, constructed as a fall pipe, and an outlet duct 4 open into the bo-ttom 2 of the tank, the latter duct extending up-wards outside the -tank 1 at least as far as 35 the maximum filling height of -the tank. The inlet and outlet apertures 5 and 6 in -the bottom 2 of the tank are spaced as far apart as possible; they are preferably provided near -the wall 14 of thc tank intwo diagonally :;
.~
1~3~L~;27~
. , . . .................. . . . .. , ~ . ; . ........ ...
18.1.80 ~ P~I~.7~-015 opposite locations. At a short distance from the inle-t and outlet apertures 5 and 6 in the bottom 2 of the tank, the inlet and outlet ducts 3 and 4 change over into parts 7 and 8, the passage of which is at least four times larger than the passage of the inlet and outlet ducts 3 and 4.
The upwards extending ducts 9 and 10 of the parts 7 and 8 openinto the inlet and outlet apertures 5 and 6, respectively, in the bottom 2 of the tank, whilst the downwards e~tending duc-ts 11 and 12 are interconnected ''J 10 b~ a parallel duct 13. The passage of the parallel duct 13 corresponds to that of the parts 7 and 8. The parallel duct 13 comprises a cleaning aperture 15 which can be closed.
The duct 9 of the inlet part 7 which opens into the inlet aperture 5 in -the bottom 2 o~ the tank :Ls ex-tended by me~ns 15 of a pipe 16 whLch proJects into the tank 1 and which ls preferably perforated.
A water reservoir 18 which servss as a heat exchanger projects from the top downwards through the lid 17 of -the tank. The reservoir 18 comprises an inle-t 19 20 for cold wa-ter and an outlet 20 for warm water. The upper part of the reservoir 18 which is situated outside the tank 1 accommoda~tes an electric auxiliary heating system 21.
The tanls 1 for waste water and -the part o~ -the reservoir 18 which projects outside the tank are surrounded by :insulation 22. 'rhe ~low rate is substantially reduced in the part 7, due to the increased passage, so that only the dif~erences in density of the waste water are important ~or the further ~low. If the flowing waste water is colder than the waste water already present in the tank 1, the colder water bypasses -the tank through the parallel duct 13, i e. the cold waste water leaves the o-utlet duct 4 without having been mixed with thewarmer water in -th~ -tank 1.
I~ -the incoming was-te water i5 warmer than the waste water in the tank 1, arl upwards flow arises in the part 7, so -that the warm was-te wa-ter rises in-to the tank 1, through the inlet aperture 5 and displaces colder water from the lower par-t of the tank 1 via the outLet aperture 6 and the outlet duct 4 in accordance wi-th its temperature.
3L~3~Z74 18.1.80 5 P~.79-015 The flow rate in the parallel duct 13 then remains zero until cold water i.s supplied again.
The waste water tank shown in Fig~lre 2 mainly corresponds to that shown in Figure 1. Therefore, 5 corresponding parts are denoted by corresponding reference numerals. The waste water tank cooperates with a heat pump 23. To this end, the lower part of the wall 14 of the tank 1 is surrounded by a coiled duct 24 which serves as an evaporator of the heat pump 23 and which is connec-ted 10 thereto via a liquid duct 25. Around the upper part of the reservoir 18 which is situated outside the tank 1 there is also provided a coiled duct 26 which is constructed as a condenser for the heat purnp 23 and which is connected thereto vla liquid ducts 27. As a result of this con-l5 struction, the energy is directly recovered from the wastewater in the upper part of the tank 1, whilst in the lower part of the tank it is recovered by means of the heat pump ; 25 i
",.;~
18.1.80 1 PI~D.79-015 "Waste water tank".
:,~
, ,~, .
, .; , The invention relates to a waste water tar~, comprising a heat exchanger, a waste water inlet duct ~~ which is constructed aa a fall pipe, and a waste water outlet duct which opens into the bottom of the tank and which extends upwards outside the tank at least as far as the maximum filling height of the tank.
Waste water -tanks of this kind serve to collect hot and cold waste water of a howse where the waste water o~ the toilets i~ separately discharged. These waste water 0 tanks comprise a heat exchanger which i8 used for pre-heating the warm water which is not inten~ed for consumption and/or which can serve as an evaporator of a heat pump.
In such a waste water tank which is known, ; for example, from "BBC Nachrichten", 1975, ~ol. 8/9, 5 pages l~97-502, warm and cold water are 'both supplied and discharged at the upper side. The already warm waste water in the tank is then mixed with colcl waste water, so that only a comparatively low mean temperature arises inthe tank. Mechanical presorting of cold ancl warm water by temperature rneasurement, comparison of the temperature of the inlet and the tank, and opening or closin~ of the inlet duct is not feasible in view of poor relia'bility (for example, contamination in the -waste water) and also because of the high costs.
French Patent Application 2,307,235 describes a waste water tank with an inlet and an outlet which both open at the top of the tank. ~n the tank itself there is provided a partition which is open at the lower side, so tha-t when waste water is admitted, the colder waste 30 water present at the bo-ttom of the reservoir is pushed away and discharged via the outlet . When the admi-tted waste water is warmer -than the waste water already present in' the tank, the mean tank temperature is at least llJOZ~4 1~.1.80 2 PHD.7~-015 maintained. However, when cold water is admitted, it is mixed with the waste water in the tank, so that the mean temperature in the tank decreases and hence also the heat content o~ the tank.
The invention has ~or its object to provide ~ a waste water tank reservoir in which the admittance of cold and warm water to the tank is controlled only by a difference in the density o~ the cold and the warm water.
In a was-te water tank of the described kind this object is achieved in accordance with the invention in that the lnlet duct for the waste water also opens into the bottom of the tank and in that the inlet and out:Let ducts change over, at a small distance before the :Lnlet and outlet apertures in the bottom of the tank, into parts having a passage which is at least four times larger than the passage of the inlet and outle-t ducts, these parts being connected to the inlet and outlet apertures via upwards extending ducts, being inter-; 20 connected by a parallel duct via downwards extending ducts.
As a result of the increased passage oP theinle-t duc-t, the flow rate o~ -the supplied waste water is reduced so that the upwards and downwards forces prevail. It is -thus achieved tha-t it is only because o~ the higher densi-ty that colder water cannot penetrate in-to the -tank but ~lows direc-tly -to -the outlet duct via the parallelduct. Only warmer water can reach the tank due to the difference indensity, so that always a maximum heat content is maintained. A waste water tank o~ -this kind can ba simply and inexpensively manufac-tured and its opera-tion is virtually trouble-free without requiring additional a~xiliary energy.
The passage of the parallel duct preferably corresponds to-~hat o~ the said parts.
In order to prevent incoming warm waste wa-ter ~rom being mixed with sornewhat colder waste water presen-t at the bottom o~ the tank~ the duct opening in-to the inlet ~L~3~2~L
, . , . , .. ~
18.1.80 3 P~D.79-015 aperture in -the bottom of the tar~ is extended with a pipe projecting in-to the tank.
,i! In order to prevent short-circuiting between - inlet aperture and outlet aperture inside the tar~ and to - ? 5 obtain a uniform displacement current, the inlet and outlet apertures inthe bottom of the tank are preferably spaced apart as far as possible. The inlet and outlet apertures in the bottom of the -tank are preferably situated near the ~ wall of the tank in two diagonally opposi-te locations.
d 10 In a preferred embodiment of the waste water tank in accordance with the invention, the heat exchanger is formed by a water reservoir which projects into the tank from the top, an inlet f`or cold water opening in-to the lower part of said reservoir.
Moreover, the waste water tank can also cooperate with a heat pump. In that case, the lower part of -the wall of the tank is preferably constructed as an evaporator of a heat pump or is connected thereto by way of a liquid cycle, -the upper part of the water reservoir which is 20 situated ou-tside the tank being constructed as a condenser of the heat pump or being connected -there-to by way of a liquid cycle.
Embodiments in accordance wi-th the invention will be described in dotail hereinafter withroference to 25 the accompanying diagramrrlatic drawing.
Figure 1 is a sectional view of a waste water tank with a heat exchanger, and Figure 2 is a sectional view of a waste water tank with a heat exchanger and a heat pump.
The waste wa-ter tar~ shown in Figure 1 comprises a tank 1 of~ for example, metal or a synthetic material.
An inlet duct 3, constructed as a fall pipe, and an outlet duct 4 open into the bo-ttom 2 of the tank, the latter duct extending up-wards outside the -tank 1 at least as far as 35 the maximum filling height of -the tank. The inlet and outlet apertures 5 and 6 in -the bottom 2 of the tank are spaced as far apart as possible; they are preferably provided near -the wall 14 of thc tank intwo diagonally :;
.~
1~3~L~;27~
. , . . .................. . . . .. , ~ . ; . ........ ...
18.1.80 ~ P~I~.7~-015 opposite locations. At a short distance from the inle-t and outlet apertures 5 and 6 in the bottom 2 of the tank, the inlet and outlet ducts 3 and 4 change over into parts 7 and 8, the passage of which is at least four times larger than the passage of the inlet and outlet ducts 3 and 4.
The upwards extending ducts 9 and 10 of the parts 7 and 8 openinto the inlet and outlet apertures 5 and 6, respectively, in the bottom 2 of the tank, whilst the downwards e~tending duc-ts 11 and 12 are interconnected ''J 10 b~ a parallel duct 13. The passage of the parallel duct 13 corresponds to that of the parts 7 and 8. The parallel duct 13 comprises a cleaning aperture 15 which can be closed.
The duct 9 of the inlet part 7 which opens into the inlet aperture 5 in -the bottom 2 o~ the tank :Ls ex-tended by me~ns 15 of a pipe 16 whLch proJects into the tank 1 and which ls preferably perforated.
A water reservoir 18 which servss as a heat exchanger projects from the top downwards through the lid 17 of -the tank. The reservoir 18 comprises an inle-t 19 20 for cold wa-ter and an outlet 20 for warm water. The upper part of the reservoir 18 which is situated outside the tank 1 accommoda~tes an electric auxiliary heating system 21.
The tanls 1 for waste water and -the part o~ -the reservoir 18 which projects outside the tank are surrounded by :insulation 22. 'rhe ~low rate is substantially reduced in the part 7, due to the increased passage, so that only the dif~erences in density of the waste water are important ~or the further ~low. If the flowing waste water is colder than the waste water already present in the tank 1, the colder water bypasses -the tank through the parallel duct 13, i e. the cold waste water leaves the o-utlet duct 4 without having been mixed with thewarmer water in -th~ -tank 1.
I~ -the incoming was-te water i5 warmer than the waste water in the tank 1, arl upwards flow arises in the part 7, so -that the warm was-te wa-ter rises in-to the tank 1, through the inlet aperture 5 and displaces colder water from the lower par-t of the tank 1 via the outLet aperture 6 and the outlet duct 4 in accordance wi-th its temperature.
3L~3~Z74 18.1.80 5 P~.79-015 The flow rate in the parallel duct 13 then remains zero until cold water i.s supplied again.
The waste water tank shown in Fig~lre 2 mainly corresponds to that shown in Figure 1. Therefore, 5 corresponding parts are denoted by corresponding reference numerals. The waste water tank cooperates with a heat pump 23. To this end, the lower part of the wall 14 of the tank 1 is surrounded by a coiled duct 24 which serves as an evaporator of the heat pump 23 and which is connec-ted 10 thereto via a liquid duct 25. Around the upper part of the reservoir 18 which is situated outside the tank 1 there is also provided a coiled duct 26 which is constructed as a condenser for the heat purnp 23 and which is connected thereto vla liquid ducts 27. As a result of this con-l5 struction, the energy is directly recovered from the wastewater in the upper part of the tank 1, whilst in the lower part of the tank it is recovered by means of the heat pump ; 25 i
Claims (7)
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PRO-PERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A waste water tank, comprising a heat exchanger, a waste water inlet duct which is constructed as a fall pipe, and a waste water outlet duct which opens into the bottom of the tank, and which extends upwards outside the tank at least as far as the maximum filling height of the tank, characterized in that the inlet duct for the waste water also opens into the bottom of the tank and in that the inlet and outlet ducts change over, at a small distance before the inlet and outlet apertures in the bottom of the tank, into parts having a passage which is at least four times larger than the passage of the inlet and outlet ducts, these parts being connected to the inlet and outlet aper-tures via upwards extending ducts and being interconnected by a parallel duct via downwards extending ducts.
2. A waste water tank as claimed in Claim 1, char-acterized in that the passage of the parallel duct corres-ponds to that of said parts.
3. A waste water tank as claimed in Claim 1 or 2, characterized in that the duct which opens into the inlet aperture in the bottom of the tank is extended into the tank over a given distance.
4. A waste water tank as claimed in Claim 1, char-acterized in that the inlet and outlet apertures in the bottom of the tank are spaced apart as far as possible.
5. A waste water tank as claimed in Claim 1, char-acterized in that the parallel duct comprises a cleaning aperture which can be closed.
6. A waste water tank as claimed in Claim 1, char-acterized in that the heat exchanger is a water reservoir which projects into the tank from the top, an inlet for cold water opening into the lower part of said reservoir.
7. A waste water tank as claimed in Claim 6, char-acterized in that the lower part of the wall of the tank is constructed as an evaporator of a heat pump or is connected PHD. 79-015.
to the evaporator by way of a liquid cycle, the upper part of the reservoir which is situated outside the tank being constructed as a condenser of the heat pump or being con-nected thereto by way of a liquid cycle.
to the evaporator by way of a liquid cycle, the upper part of the reservoir which is situated outside the tank being constructed as a condenser of the heat pump or being con-nected thereto by way of a liquid cycle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792906096 DE2906096A1 (en) | 1979-02-17 | 1979-02-17 | WATER STORAGE |
| DEP2906096.6 | 1979-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130274A true CA1130274A (en) | 1982-08-24 |
Family
ID=6063140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA345,703A Expired CA1130274A (en) | 1979-02-17 | 1980-02-14 | Waste water tank |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS55110890A (en) |
| CA (1) | CA1130274A (en) |
| DE (1) | DE2906096A1 (en) |
| FR (1) | FR2453382A1 (en) |
| GB (1) | GB2049123B (en) |
| IT (1) | IT1140601B (en) |
| SE (1) | SE443390B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1119442B (en) * | 1979-10-30 | 1986-03-10 | Fiat Ricerche | PROCEDURE FOR HEATING WATER USED IN A APPLIANCE INSERTED IN A DOMESTIC HYDRAULIC CIRCUIT AND EQUIPMENT SUITABLE TO CARRY OUT SUCH PROCEDURE |
| DE4324687A1 (en) * | 1993-07-23 | 1995-01-26 | Werner Hub | Recovery of heat from waste water |
| GB2402204A (en) * | 2003-05-21 | 2004-12-01 | Villers Pierre De | A heat exchanger for waste water |
| FR2946127B1 (en) * | 2009-05-26 | 2013-06-28 | Commissariat Energie Atomique | HEAT RECOVERY FROM WASTEWATER |
| FR2970071B1 (en) * | 2011-01-05 | 2017-05-12 | Lyonnaise Eaux France | DEVICE FOR RECOVERING HEAT ON GRAY WATER |
| ES2449625B1 (en) * | 2012-03-27 | 2015-09-08 | Sedical S.A. | Hydraulic system to recover heat energy from the outlet water of the pool vessel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2307235A1 (en) * | 1975-04-07 | 1976-11-05 | Serete | Water heating system for building - has temporary drain water storage tank containing evaporator of heat pump |
| DE2625157A1 (en) * | 1976-06-04 | 1977-12-08 | Bogner Und Huber Gmbh & Co San | Heat recovery system from hot waste water - feeds storage from collector with heat exchanger and controlled drain valve |
| FR2381257A1 (en) * | 1977-02-16 | 1978-09-15 | David Jean Pierre | Heat recovery system removing heat from waste water - by using it to heat up fresh water, domestic or industrial |
-
1979
- 1979-02-17 DE DE19792906096 patent/DE2906096A1/en active Granted
-
1980
- 1980-02-14 GB GB8004998A patent/GB2049123B/en not_active Expired
- 1980-02-14 SE SE8001148A patent/SE443390B/en not_active IP Right Cessation
- 1980-02-14 JP JP1612180A patent/JPS55110890A/en active Pending
- 1980-02-14 IT IT19922/80A patent/IT1140601B/en active
- 1980-02-14 CA CA345,703A patent/CA1130274A/en not_active Expired
- 1980-02-15 FR FR8003426A patent/FR2453382A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT8019922A1 (en) | 1981-08-14 |
| FR2453382B1 (en) | 1983-12-09 |
| JPS55110890A (en) | 1980-08-26 |
| IT8019922A0 (en) | 1980-02-14 |
| DE2906096A1 (en) | 1980-08-28 |
| GB2049123A (en) | 1980-12-17 |
| GB2049123B (en) | 1983-03-30 |
| SE443390B (en) | 1986-02-24 |
| IT1140601B (en) | 1986-10-01 |
| SE8001148L (en) | 1980-08-18 |
| FR2453382A1 (en) | 1980-10-31 |
| DE2906096C2 (en) | 1988-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |