DK148332B - PLANT FOR HEAT EXTRACTION FROM FLUID, INSIDE WASTE WATER - Google Patents
PLANT FOR HEAT EXTRACTION FROM FLUID, INSIDE WASTE WATER Download PDFInfo
- Publication number
- DK148332B DK148332B DK260978AA DK260978A DK148332B DK 148332 B DK148332 B DK 148332B DK 260978A A DK260978A A DK 260978AA DK 260978 A DK260978 A DK 260978A DK 148332 B DK148332 B DK 148332B
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- DK
- Denmark
- Prior art keywords
- vanes
- heat
- chamber
- liquid
- heat exchanger
- Prior art date
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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
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
-
- 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
- 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]
- Y02B30/56—Heat recovery units
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- 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-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
148332148332
Den foreliggende opfindelse angår et anlæg til varmeudvinding fra væsker, især afløbsvand, og som omfatter et antal indbyrdes forbundne kamre, igennem hvilke væsken successivt ledes og bringes i varmeledende berøring med i mindst et af kamrene med indbyrdes afstand anbragte varmevekslerelementer.The present invention relates to a system for heat recovery from liquids, in particular wastewater, comprising a number of interconnected chambers through which the liquid is successively conducted and brought into heat conductive contact with at least one of the chambers spaced apart.
Sådanne anlæg kendes fra USA-patent nr. 3.361.194, tysk fremlæggel se s skrift nr. 2.304.537 og de tyske offentliggørelsesskrifter nr. 2.419.479 og 2.625.157. I ingen af disse anlæg er der imidlertid truffet foranstaltninger til at bibeholde anlæggets varmeoverførsel på en høj værdi.Such plants are known from United States Patent No. 3,361,194, German Publication No. 2,304,537 and German Publication Nos. 2,419,479 and 2,625,157. However, in none of these plants have measures been taken to maintain the heat transfer of the system at a high value.
Anlægget ifølge opfindelsen er ejendommeligt ved, at der i mellemrummene mellem varmevekslerelementerne er anbragt en eller flere skovle, som er indrettet til under varmeoverførs-len af et drivorgan at føres langs elementernes overflader, og at skovlenes plan forløber i hovedsagen på tværs på nævnte overflader. Derved opnås en kontinuerlig rensning af varmevekslernes overflader, således at kalk- og slamaflejringer forhindres eller undgås på elementerne til bibeholdelse af disses lave K-værdi, og endvidere holdes også det eller de kamre, hvori der er anbragt varmevekslerelementer, rene af den ved skovlene dannede væskebevægelse, der hindrer aflejringer på kammervægge og kammerbund, selv ved lave væsketilførsler til anlægget.The plant according to the invention is characterized in that one or more vanes arranged in the spaces between the heat exchanger elements are arranged to pass along the surfaces of the elements during the heat transfer and that the planes of the vanes extend substantially transversely on said surfaces. Thereby, a continuous cleaning of the surfaces of the heat exchangers is achieved, so that limescale and sludge deposits are prevented or avoided on the elements to maintain their low K value, and furthermore, the chamber or chambers in which heat exchanger elements are arranged are kept clean by the blades formed by the vanes. fluid movement that prevents deposits on chamber walls and chamber bottoms, even at low fluid inputs to the system.
Endvidere opnås ifølge opfindelsen mulighed for kontinuerlig tilpasning af anlæggets varmeoverføringskapacitet efter de tilstrømmede væskers mængde og varmeindhold, idet skovlenes drivorgan kan regulere skovlenes hastighed og dermed væskens hastighed samt dennes grad af turbulens, af hvilken varme-overførslen er en funktion.Furthermore, according to the invention, it is possible to continuously adjust the heat transfer capacity of the system according to the quantity and heat content of the flowing fluids, the vane drive means being able to regulate the speed of the vanes and thus the speed of the liquid as well as its degree of turbulence, of which heat transfer is a function.
I en foretrukken udførelsesform består varmevekslerelementerne af cylindriske kapper, der er anbragt koncentrisk, fortrinsvis om en lodret akse med en vis parvis indbyrdes radial af- 2 1ΑΘ33 2 stand, hvorhos hver skovl består af et padellignende legeme med en længde i hovedsagen lig kappelængden samt en bredde svarende til, men mindre end nævnte afstand. Derved opnås, at alle skovlene kan drives med et centralt anbragt drivorgan, og derved fungerer selve anlægget som en kombineret enhed til varmeveksling, rensning af varmevekslerelementerne og pumpning, hvorved der pumpes væske igennem et tilførselskammer til afkøling af væsken heri under eventuel samtidig koncentrering af slammet heri. Sidstnævnte kan ske ved anbringelse af slamudskillelsesorganer, såsom udskillelsesgitre ved pumpens sugeside. Der kan også ved pumpens trykside anbringes et udskillelsesorgan, der ved reversering af pumpens omdrejningsretning, til at fungere som sugefilter samtidig med, at det tidligere som sugefilter anvendte udskillelsesorgan blæses rent ved pumpens nye trykside.In a preferred embodiment, the heat exchanger elements consist of cylindrical sheaths arranged concentrically, preferably about a vertical axis with a certain pairwise radial spacing, each vane consisting of a paddle-like body having a length substantially equal to the sheath length and a width equal to but less than said distance. This results in that all the vanes can be operated with a centrally located drive means, and thus the plant itself functions as a combined unit for heat exchange, cleaning of the heat exchanger elements and pumping, whereby liquid is pumped through a supply chamber for cooling the liquid therein, with possible simultaneous concentration of the sludge. here. The latter may be effected by the application of sludge separation means such as discharge grids at the suction side of the pump. Also, at the pressure side of the pump, a discharge means, which by reversing the direction of rotation of the pump, can act as a suction filter while the former used as a suction filter is blown clean at the new pressure side of the pump.
Skovlenes bevægelse langs varmevekslerelementernes overflader har hensigtsmæssigt indstillelig hastighed og er fortrinsvis Også reversibel; I en hensigtsmæssig udførelsesform er skovlenes hastighed styret af temperaturen i væsken, således at den højere temperatur forøger hastigheden.The movement of the vanes along the surfaces of the heat exchanger elements is suitably adjustable and preferably also reversible; In a convenient embodiment, the speed of the blades is controlled by the temperature of the liquid so that the higher temperature increases the speed.
Skovlenes bevægelsesretning er hensigtsmæssigt tidsstyret eller ændres ved en given temperatur i væsken.The direction of movement of the vanes is suitably timed or altered at a given temperature in the liquid.
Ved de mod varmevekslerelementernes overflader vendte sidekanter af skovlene kan der hensigtsmæssigt være anbragt udragende børsteorganer, som sammen med hver skovl helt udfylder mellemrummet mellem hvert par varmevekslerelementer.Conveniently, at the side edges of the heat exchanger elements facing the blades, protruding brush members may be provided which, together with each vane, completely fill the space between each pair of heat exchanger elements.
Disse børsteorganer kan hensigtsmæssigt være udformet som børstevalser, der er frit rotérbart lejret eller drevet ro-térbart lejret, fortrinsvis let udskifteligt, på skovlenes 3 148332 sidekanter.These brush members may conveniently be formed as brush rollers which are freely rotatably mounted or driven rotatably supported, preferably easily replaceable, on the lateral edges of the vanes.
Opfindelsen vil i det følgende blive nærmere forklaret i forbindelse med et udførelseseksempel og under henvisning til tegningen, hvor fig. 1 viser et lodret snit langs I-I i fig. 2 i et anlæg ifølge opfindelsen, fig. 2 et snit langs II-II i fig. 1, og fig. 3 et snit gennem en skovl mellem et par kapper, hvor skovlen er forsynet med rotérbart lejrede børster.The invention will now be described in more detail with reference to an exemplary embodiment and with reference to the drawing, in which fig. 1 shows a vertical section along I-I in FIG. 2 in an installation according to the invention, fig. 2 is a section along II-II of FIG. 1, and FIG. 3 is a section through a vane between a pair of sheaths, the vane being provided with rotatably mounted brushes.
Ved opfindelsen muliggøres det at udføre en helautomatisk regulering af den fra vandet udvundne varmeeffekt ved svingende gennemstrømning og temperatur af afløbsvand.The invention makes it possible to carry out a fully automatic control of the heat output derived from the water by fluctuating flow and the temperature of the effluent.
I det viste anlæg indføres afløbsvandet i et første kammer, nemlig et slamkammer 1, gennem en ledning 2. I bundet af dette kammer 1 er der anbragt en slampumpe 3. I kammeret 1 udskilles størsteparten af slammet fra vandet, og slammet bortpumpes af pumpen 2 på intermitterende måde fra kammerets bund, eksempelvis når vandtemperaturen synker til et passende forudindstillet niveau. Det bortpumpede slam kan føres til den i strømningsretningen efterliggende del af afløbssystemet.In the system shown, the effluent water is introduced into a first chamber, namely a sludge chamber 1, through a conduit 2. A sludge pump 3 is attached to this chamber 1. In the chamber 1, most of the sludge is separated from the water and the sludge is pumped off by the pump 2. intermittently from the bottom of the chamber, for example when the water temperature drops to an appropriate preset level. The pumped-out sludge can be fed to the part of the drainage system underlying the flow direction.
I tilslutning til det første kammer 1 er anbragt et andet kammer 4, som står i forbindelse med det første kammer 1 gennem ristdækkende åbninger 5, 6, hvis riste tillader større slampartikler, som ikke er bundfældet i kammeret 1, at passere ind i kammeret 4. Som det fremgår af fig. 2 er åbningerne udformet i afstand fra hinanden og er adskilt ved hjælp af en skillevæg 7 mellem kamrene 1 og 4.Adjacent to the first chamber 1 is arranged a second chamber 4, which communicates with the first chamber 1 through grate-covered openings 5, 6, the grating of which permits larger sludge particles not deposited in the chamber 1 to pass into the chamber 4 As shown in FIG. 2, the openings are spaced apart and separated by a partition 7 between the chambers 1 and 4.
Kammeret 4 er udformet cylindrisk og er forsynet med et i et afløb 9 udmundende bundudløb 8, der ligger lavere end udmundingen af ledningen 2 i kammeret 1.The chamber 4 is cylindrical in shape and is provided with a bottom outlet 8 opening in a drain 9 which is lower than the outlet of the conduit 2 in the chamber 1.
4 148332 I det andet kammer er anbragt varmevekslere i form af dobbelt-vsggede cylindriske kapper 10, der er lejret koncentrisk i forhold til hinanden med den markerede afstand a imellem kappeoverfladerne. Denne afstand genfindes mellem væggen 11 af kammeret 4 og den yderste kappe samt mellem et centralt kernelegeme 12 i kammeret 4 og den inderste kappe. Ved hjælp af ikke viste rørledninger for et egnet kulde- eller varme-bærende medium, som cirkulerer gennem de nævnte kapper, er varmevekslerne 10 koblet til en ikke vist varmepumpe af kendt art.In the second chamber, heat exchangers are arranged in the form of double-walled cylindrical sheaths 10, which are concentrically positioned relative to one another with the marked distance a between the sheath surfaces. This distance is found between the wall 11 of the chamber 4 and the outer sheath as well as between a central core body 12 of the chamber 4 and the inner sheath. By means of pipelines not shown for a suitable cold or heat-bearing medium circulating through the said casings, the heat exchangers 10 are coupled to a heat pump of a known type not shown.
Kapperne 10 har glatte overflader og er helt omgivet af den væske, som kan afgive varme, og hvis overflade er betegnet med 13.The caps 10 have smooth surfaces and are completely surrounded by the liquid which can give off heat and whose surface is indicated by 13.
Langs diameteren af kammeret 4 er anbragt en arm 14, som ved hjælp af en ikke vist motor svinges rundt med rotationscentrum i midten af kammeret 4. Denne arm er forsynet med skovle 15, der strækker sig ned imellem kapperne 10, henholdsvis mellem kammervæggene og de nærliggende kapper. Skovlene 15 er hensigtsmæssigt anbragt symmetrisk på hver side af rotationsaksen. Den nævnte motor er trinløst variabel og er y-derligere reversibel.Along the diameter of the chamber 4 is mounted an arm 14 which is rotated by means of a motor not shown, with a center of rotation in the center of the chamber 4. This arm is provided with vanes 15 extending down between the sheaths 10, respectively between the chamber walls and the nearby cloaks. The vanes 15 are suitably arranged symmetrically on each side of the axis of rotation. Said engine is infinitely variable and is further reversible.
Som det fremgår af fig. 2 er åbningerne 5 og 6 beliggende på hver sin tænkte tangent til væggen af kammeret 4 og i hovedsagen vinkelret derpå. Tangenterne skærer hinanden umiddelbart udenfor kammeret 1. Gitrene i åbningerne 5 og 6 kan være af enhver egnet type, ligesom de kan være f.eks. to- eller tredobbelte .As shown in FIG. 2, the openings 5 and 6 are located on each tangent tangent to the wall of the chamber 4 and generally perpendicular thereto. The keys intersect immediately outside the chamber 1. The gratings in the openings 5 and 6 can be of any suitable type, just as they can be e.g. two or triple.
En varmeoverførsel fra afløbsvandet til den nævnte varmebærer fremkommer på den måde, at afløbsvandet bringes i rotation (se pilen A) i det nævnte andet kammer 4 ved hjælp af de rotordrevne skovle 15. Det herved roterende vand vil strømme rundt i kammeret 4, og vandet vil strømme ud gennem afløbet 9 ef- 148332 5 terhånden som nyt afløbs- eller spildevand tilføres gennem ledningen 2. En del af det i kammeret 4 cirkulerende vand vil strømme ind i kammeret 1 gennem de til dette formål placerede gitteråbninger 5 og 6, se pilen B. Fra kammeret 1 vil der således gennem åbningen 5 udstrømme såvel nytilført af-løbsvand som afløbsvand, der er indstrømmet fra kammeret 4, se pilen C. Det fremgår heraf, at varmetilførslen til varmevekslere vil hidrøre også fra varmeenergien i afløbsvandet eller slammet i kammeret 1.A heat transfer from the wastewater to said heat carrier results in the way that the wastewater is rotated (see arrow A) in said second chamber 4 by means of the rotor driven vanes 15. The rotating water thereby flows into the chamber 4 and the water will flow out through the drain 9 afterwards as new wastewater or waste water is supplied through the conduit 2. Part of the water circulating in the chamber 4 will flow into the chamber 1 through the grid openings 5 and 6 for this purpose, see the arrow B. From the chamber 1, thus, through the opening 5, both newly supplied wastewater and wastewater flowing from the chamber 4 will see arrow C. It can be seen from this that the heat supply to heat exchangers will also be derived from the heat energy in the wastewater or sludge in the chamber. first
Varmeoverførslen fra det cirkulerende vand til de varmeopta-gende overflader af kapperne 10 står i et direkte forhold til vandets hastighed og til dets grad af turbulens. Ved at man med drivmotoren kan regulere hastigheden af skovlene 15 på trinløs måde kan man tilsvarende opnå en momentant varierende varmeudvinding fra afløbsvandet i forhold til den varierende tilførte varmeenergi i dette, d.v.s. i forhold til afløbsvandets variationer i mængde og temperatur. Rotationshastigheden af armen 14 og dermed varmeeffektudvindingen fra vandet kan styres f.eks, ved hjælp af en tempraturføler for vandtemperaturen.The heat transfer from the circulating water to the heat absorbing surfaces of the sheaths 10 is in direct proportion to the velocity of the water and to its degree of turbulence. By being able to control the speed of the vanes 15 in an infinitely variable manner with the drive motor, a momentarily varying heat recovery from the wastewater can be obtained in relation to the varying applied heat energy therein, i.e. in relation to the wastewater variations in quantity and temperature. The speed of rotation of the arm 14 and thus the heat power recovery from the water can be controlled, for example, by means of a temperature sensor for the water temperature.
Som vist i fig. 3 kan de nævnte skovle hensigtsmæssigt være formet som padellignende legemer 16, som strækker sig langs hele højden af en kappe 10. Bredden af padlerne 16 er mindre end afstanden a og padlerne 16 er ved deres ydre ender forsynet med valser 17, der bærer egnede børster 18 og er frit roterbart lejrede i støttelejer 19 på den pågældende padel 16. Da padelen 16 sammen med de tilhørende børstevalser 17 helt udfylder mellemrummene a, vil børsterne 18 skrabe og rulle imod de varmeoptagende overflader af kapperne, hvorved turbulensen øges samtidig med, at forureningsbelægninger på de nævnte overflader modvirkes eller helt forhindres.As shown in FIG. 3, said blades may conveniently be shaped like paddle-like bodies 16 extending along the entire height of a sheath 10. The width of the paddles 16 is less than the distance a and the paddles 16 are provided at their outer ends with rollers 17 carrying suitable brushes. 18 and are freely rotatably mounted in support bearings 19 on the particular paddle 16. As the paddle 16, together with the associated brush rollers 17, completely fills the spaces a, the brushes 18 will scrape and roll against the heat absorbing surfaces of the sheaths, thereby increasing turbulence at the same time as contaminant coatings. on said surfaces is counteracted or completely prevented.
Efterhånden som afløbsvandet passerer fra kammeret 1 til kammeret 4 gennem gitteråbningen 5, vil dettes gitter udsættes 148332 6 for en stigende grad af tilstopning. Dette vil imidlertid modvirkes af, at rotationsretningen for armen 14 kan omskiftes, hvorved der fremkommer helt andre eller modsatte strømningsforhold. Vandet vil nu strømme ind i kammeret 1 gennem åbningen 5 og ud gennem åbningen 6, hvorved vandstrømmen automatisk vil rense gitteråbningen 5. Gitrenes tilstopningstendenser kan herved effektivt imødegås.As the wastewater passes from the chamber 1 to the chamber 4 through the grating opening 5, its grating will be subjected to an increasing degree of clogging. However, this will be counteracted by the fact that the direction of rotation of the arm 14 can be switched, thus producing completely different or opposite flow conditions. The water will now flow into the chamber 1 through the aperture 5 and out through the aperture 6, whereby the water flow will automatically clean the grating aperture 5. The clogging tendencies of the grids can thereby be effectively countered.
De børstebærende valser 17 kan være anbragt let udskifteligt, således at man altid kan opnå en effektiv rengøring af kappeoverfladerne, og børstevalserne kan endog være positivt motordrevne. Med 20 er betegnet en gangbro eller et beskyttelsesdæksel over det viste beholdersystem. Indersiderne af kapperne 10 kan på kendt måde være udformet med fremstående ribbedele for bedre varmeoverførsel til det kulde- eller varme-bærende medium,.der eksempelvis kan bestå af Freon R12 eller R22. Varmevekslerne kan også udføres som skruelinieformet rundtgående rør med firkantet eller eventuelt cirkulært tværsnit. ·The brush-bearing rollers 17 can be arranged easily interchangeable, so that effective cleaning of the sheath surfaces can always be achieved, and the brush rollers can even be positively motor driven. 20 is designated a walkway or protective cover over the container system shown. The inside of the sheaths 10 may in a known manner be formed with protruding rib parts for better heat transfer to the cold or heat-bearing medium, which may, for example, consist of Freon R12 or R22. The heat exchangers can also be made as helical circular tubes of square or possibly circular cross section. ·
Opfindelsen vil selvsagt kunne udnyttes med fordel, også indenfor industrisektoren for udvinding af varme fra dagspilde-vand.The invention can of course be utilized advantageously, also in the industrial sector for heat extraction from waste water.
Ved mindre anlæg, såsom mindre beboelseshuse og villaer, kan man hensigtsmæssigt benytte en drivmotor med trinvis variabel hastighed fremfor en trinløst variabel motor.For smaller plants, such as smaller residential houses and villas, it is advisable to use a drive motor with stepwise variable speed rather than a continuously variable motor.
På grund af de undertiden ret kraftige variationer, som forekommer i tilstrømningen af afløbsvand, hvor f.eks. tilstrømningen næsten helt kan standse i perioder om natten, kan man for at øge varmeudvindingen indrette anlægget ifølge opfindelsen på en sådan måde, at det afløbsvand, hvorfra der allerede er udvundet varme, bortpumpes fra kamrene 1 og 4 ved hjælp af pumpen 3. Det nytilstrømmende afløbsvand skal således ikke derefter opfylde den funktion at opvarme forekommende, afkølet vand i de respektive kamre.Due to the sometimes quite strong variations that occur in the flow of wastewater, where e.g. If the inflow can be almost completely stopped during periods at night, in order to increase the heat recovery, the system according to the invention can be arranged in such a way that the effluent from which heat has already been extracted is pumped away from the chambers 1 and 4 by means of the pump 3. Thus, wastewater should not then fulfill the function of heating any cooled water in the respective chambers.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7706927 | 1977-06-15 | ||
| SE7706927A SE403316B (en) | 1977-06-15 | 1977-06-15 | PROCEDURE AND DEVICE FOR HEAT EXTRACTION FROM WHEAT SHOES, PREFERABLY WASTEWATER |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK260978A DK260978A (en) | 1978-12-16 |
| DK148332B true DK148332B (en) | 1985-06-10 |
| DK148332C DK148332C (en) | 1985-11-11 |
Family
ID=20331596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK260978A DK148332C (en) | 1977-06-15 | 1978-06-12 | PLANT FOR HEAT EXTRACTION FROM FLUID, INSIDE WASTE WATER |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE2825729A1 (en) |
| DK (1) | DK148332C (en) |
| FI (1) | FI781861A (en) |
| NO (1) | NO782038L (en) |
| SE (1) | SE403316B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE430184B (en) * | 1979-10-24 | 1983-10-24 | Litzberg K L | PROCEDURE FOR THE WASTE WATER RECOVERY AND THE IMPLEMENTATION PROCEDURE |
| DE19506015A1 (en) * | 1995-02-22 | 1995-10-12 | Heinz Woestmann | Method of recovering heat from waste and rain water |
| DE19817031C2 (en) * | 1998-04-17 | 2000-09-28 | Markus Daschner | Maintenance-free device for heat recovery from waste water |
| NL1031011C2 (en) * | 2006-01-26 | 2007-07-27 | Hei Tech Bv | Method for cleaning a heat exchanger, assembly of such a heat exchanger and a cleaning member intended therefor, as well as shower and / or bath device comprising such an assembly. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2420867A1 (en) * | 1974-04-30 | 1975-11-20 | Robert Lamb | Heat recovery from waste water of residential buildings - by heat exchange between separately guided heat-releasing and heat-receiving media |
| DE2530952A1 (en) * | 1975-07-11 | 1977-01-27 | Bbc Brown Boveri & Cie | Domestic warm water system using waste water heat - has domestic and waste tanks with connecting heat transfer circulatory system |
-
1977
- 1977-06-15 SE SE7706927A patent/SE403316B/en not_active IP Right Cessation
-
1978
- 1978-06-12 DK DK260978A patent/DK148332C/en not_active IP Right Cessation
- 1978-06-12 DE DE19782825729 patent/DE2825729A1/en active Granted
- 1978-06-12 FI FI781861A patent/FI781861A/en not_active Application Discontinuation
- 1978-06-12 NO NO782038A patent/NO782038L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2825729A1 (en) | 1979-04-12 |
| DE2825729C2 (en) | 1989-10-26 |
| SE403316B (en) | 1978-08-07 |
| NO782038L (en) | 1978-12-18 |
| DK148332C (en) | 1985-11-11 |
| FI781861A (en) | 1978-12-16 |
| DK260978A (en) | 1978-12-16 |
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