GB1559937A - Apparatus for recovering heat from waste water - Google Patents
Apparatus for recovering heat from waste water Download PDFInfo
- Publication number
- GB1559937A GB1559937A GB31591/77A GB3159177A GB1559937A GB 1559937 A GB1559937 A GB 1559937A GB 31591/77 A GB31591/77 A GB 31591/77A GB 3159177 A GB3159177 A GB 3159177A GB 1559937 A GB1559937 A GB 1559937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heat pipes
- heat
- waste water
- container
- containers
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 239000013505 freshwater Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009182 swimming Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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
- F24D17/001—Domestic hot-water supply systems using recuperation of waste heat with accumulation of heated water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/07—Heat pipes
-
- 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
Landscapes
- 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-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The device has a wastewater container (1) and a fresh water container (4), which are in thermal exchange with one another. In order to achieve a high degree of heat reclamation when temperature differences are low, heat pipes (8) are provided for heat exchange which are fitted with a capillary system. The inner of the heat pipes is at underpressure and contains an evaporable fluid. The heat pipes (8) have parts which succeed one another in the longitudinal extent and of which at least one is situated in the interior of the wastewater container (1) and at least one is situated in the interior of the fresh water container. <IMAGE>
Description
(54) APPARATUS FOR RECOVERING HEAT FROM WASTE WATER
(71) We, BUDERUS AKTIENGESELL
SCHAFT (formerly known as Buderus'sche
Eisenwerke), a German Body Corporate, of Postfach 1220, 633 Wetzlar, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to apparatus for recovering heat from waste water.
Waste waters from households, from swimming pools or from industrial plant have in many cases temperatures which are considerably above those of the fresh water needed. The warmed waste water is put into the drains whilst fresh water has first of all to be heated up before it is used. In this way large quantities of energy are lost, which should be utilized in the interests of energy saving.
Heat can be recovered from waste water in a simple manner by conducting the waste water through a heat exchanger through which fresh water flows. Owing to the rather low temperature gradient in many cases, however, the efficiency of such heat exchangers is somewhat low. Reliable success can be achieved only with very large temperature differences and with large amounts of waste water, when using simple heat exchangers.
With a view to obtaining high heat recovery efficiency when dealing with low temperature differences and relatively small sizes of heat exchanger, means have to be provided which improve the transfer of heat from the waste water to the fresh water.
Only such apparatus would be suited to economic use in households, swimming pools and the like. The means for improving the transfer of heat must be simply arranged, especially for relatively small installations, and nevertheless be efficient. The cost of an installation and also the operating expenses should be kept to low values. Movable parts and the use of auxiliary energy and special control and regulating elements should be avoided as far as possible, since investment on such things can be made good only in relatively large installations.
As suitable means for improving the heat exchange between the waste water and the fresh water in a heat exchanger the invention proposes using "heat pipes" extending into the containers for the two media and which are provided with a capillary system and filled with an evaporable fluid and are evacuated in the closed state. The containers may also be in a heat-exchange relationship otherwose than by means of the heat pipes.
As compared with other known heatconducting means, heat pipes have the advontage that they can transport relatively large heat flows whilst keeping to small temperature differences. This transport of heat is brought about by the fact that, owing to the negative pressure existing, the fluid evaporates in the presence of the temperatures of the warmed medium, and condenses again in the presence of the temperatures of the warmer medium, and condenses again in the presence of the temperatures of the cooler medium. Owing to the evaporation and subsequent condensation, with the co-operation of the capillary system-which is, for example, a fine-mesh wire gauze-there is produced a continual circulation of the fluid and thus a tlasl- porting of heat from the evaporation zone to the condensation zone.
It is advantageous to use such heat pipes for the recovery of heat from waste water owing to the conditions which obtain in that field. The good transport of heat is conductive towards high levels of efficiency. The heat exchanger ca 1 be of very simple con- struction. Movable parts, control and regulating elements or the use of auxiliary energies are dispensed with. Thus the plant used for heat recovery is also operated in an extremely economical way, so that its use becomes acceptable for the first time for the fields specified.
Constructional examples of the invention are shown in the 4 Figures of the accompanying drawings, these being respectively longitudinal sections through heat exchangers,
A lower container part 1, which is to be connected into the waste water conduit by means of the unions 2, 3, is connected by a flange or welded connection with an upper container part 4 having unions 5, 6 for the fresh water connection. In the region of the partition wall 7, which as shown in
Fig. 3 can be corrugated in part to compensate for expansion phenomena, a direct heat exchange takes place between the two media. Heat pipes 8, operating on the principle already described hereinbefore, improve the heat exchange by a multiple factor.
The heat pipes 8 are mounted in the partition wall 7 by means of elastic sleeves or stuffing-boxes 9 in Figs. 1 and 2, and welded into the partition wall 7 in Figs. 3 and 4. They may be straight or hairpinshaped. Their ends can penetrate through the upper container, allowing cleaning, evacuation and filling from the outside. Bringing the heat pipes together in top or bottom headers 10 facilitates this work, which can be carried out through a single filling union or nozzle 11.
The filling union can be accessible through a lower outlet aperture 12 as shown in Fig.
4 or from the container side as shown in
Fig. 3. An arrangement of the installation shown in Fig. 4, with heat pipes as shown in Fig. 1 if appropriate, is conductive towards a stress-free system. The outlet aperture 12 also allows cleaning of the lower container part 1 after a relatively long period in operation.
The container parts can be manufactured from copper or stainless steel in order to avoid the risk of corrosion phenomena. It is also very advantageous to have a steel construction with an anti-corrosion layer.
This layer, for example a thermoglaze, may also be provided on the heat pipes. Sacrificial anodes 13 are also provided as additional protection against corrosion.
WHAT WE CLAIM IS:- 1. Apparatus for recovering heat from waste water, comprising a fresh water container and a waste water container, and including heat pipes extendng into the two containers and which are provided with a capillary system, are filled with an evaporable fluid and are evacuated in the closed state, to put the two containers in a heat exchange relationship.
2. Apparatus according to claim 1, wherein the heat pipes are straight.
3. Apparatus according to claim 1 or claim 2, wherein the heat pipes extend completely through one of the two containers.
4. Apparatus according to claim 1, wherein the heat pipes are curved in hairpin shape.
5. Apparatus according to claim 4, wherein one or both straight portions of the heat pipes extend completely through one of the two containers.
6. Apparatus according to any one of claims 1 to 5, wherein all the heat pipes open at one end into a common header.
7. Apparatus according to any one of claims 1 to 6, wherein all the surfaces of the containers which come into contact with water and all the surfaces of the heat pipes which come into contact with water are coated with an anti-corrosion layer.
8. Apparatus for recovering heat from waste water, substantially as herein described with reference to any one of Figs. 1 to 4 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (8)
- **WARNING** start of CLMS field may overlap end of DESC **.A lower container part 1, which is to be connected into the waste water conduit by means of the unions 2, 3, is connected by a flange or welded connection with an upper container part 4 having unions 5, 6 for the fresh water connection. In the region of the partition wall 7, which as shown in Fig. 3 can be corrugated in part to compensate for expansion phenomena, a direct heat exchange takes place between the two media. Heat pipes 8, operating on the principle already described hereinbefore, improve the heat exchange by a multiple factor.The heat pipes 8 are mounted in the partition wall 7 by means of elastic sleeves or stuffing-boxes 9 in Figs. 1 and 2, and welded into the partition wall 7 in Figs. 3 and 4. They may be straight or hairpinshaped. Their ends can penetrate through the upper container, allowing cleaning, evacuation and filling from the outside. Bringing the heat pipes together in top or bottom headers 10 facilitates this work, which can be carried out through a single filling union or nozzle 11.The filling union can be accessible through a lower outlet aperture 12 as shown in Fig.4 or from the container side as shown in Fig. 3. An arrangement of the installation shown in Fig. 4, with heat pipes as shown in Fig. 1 if appropriate, is conductive towards a stress-free system. The outlet aperture 12 also allows cleaning of the lower container part 1 after a relatively long period in operation.The container parts can be manufactured from copper or stainless steel in order to avoid the risk of corrosion phenomena. It is also very advantageous to have a steel construction with an anti-corrosion layer.This layer, for example a thermoglaze, may also be provided on the heat pipes. Sacrificial anodes 13 are also provided as additional protection against corrosion.WHAT WE CLAIM IS:- 1. Apparatus for recovering heat from waste water, comprising a fresh water container and a waste water container, and including heat pipes extendng into the two containers and which are provided with a capillary system, are filled with an evaporable fluid and are evacuated in the closed state, to put the two containers in a heat exchange relationship.
- 2. Apparatus according to claim 1, wherein the heat pipes are straight.
- 3. Apparatus according to claim 1 or claim 2, wherein the heat pipes extend completely through one of the two containers.
- 4. Apparatus according to claim 1, wherein the heat pipes are curved in hairpin shape.
- 5. Apparatus according to claim 4, wherein one or both straight portions of the heat pipes extend completely through one of the two containers.
- 6. Apparatus according to any one of claims 1 to 5, wherein all the heat pipes open at one end into a common header.
- 7. Apparatus according to any one of claims 1 to 6, wherein all the surfaces of the containers which come into contact with water and all the surfaces of the heat pipes which come into contact with water are coated with an anti-corrosion layer.
- 8. Apparatus for recovering heat from waste water, substantially as herein described with reference to any one of Figs. 1 to 4 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762635681 DE2635681A1 (en) | 1976-08-07 | 1976-08-07 | DEVICE FOR RECOVERING HEAT FROM WASTEWATER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1559937A true GB1559937A (en) | 1980-01-30 |
Family
ID=5985000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31591/77A Expired GB1559937A (en) | 1976-08-07 | 1977-07-27 | Apparatus for recovering heat from waste water |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT361669B (en) |
| BE (1) | BE857427A (en) |
| CH (1) | CH622092A5 (en) |
| DE (1) | DE2635681A1 (en) |
| FR (1) | FR2360863A1 (en) |
| GB (1) | GB1559937A (en) |
| IT (1) | IT1082253B (en) |
| NL (1) | NL7708297A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124356A (en) * | 1982-07-16 | 1984-02-15 | Charles Henry Busch | Water heating heat exchanger |
| CN100408933C (en) * | 2004-09-02 | 2008-08-06 | 陈喜春 | Gasification coal-saving environmental protection normal pressure hot-water boiler |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2953500C2 (en) * | 1979-06-30 | 1985-08-08 | Wieland-Werke Ag, 7900 Ulm | Heat exchanger with heat pipes |
| DE2926578C2 (en) * | 1979-06-30 | 1983-12-15 | Wieland-Werke Ag, 7900 Ulm | Heat transfer device |
| DE2952216C2 (en) | 1979-12-22 | 1983-01-27 | Mannesmann AG, 4000 Düsseldorf | Method and device for the recovery and recycling of heat from the exhaust gases of metallurgical processes |
| DE3018800A1 (en) * | 1980-05-16 | 1981-11-26 | Buderus Ag, 6330 Wetzlar | DEVICE FOR EXCHANGING HEAT BETWEEN TWO DIFFERENT TEMPERATURE LIQUIDS |
| DE3040869A1 (en) * | 1980-10-30 | 1982-06-16 | Robert Bosch Gmbh, 7000 Stuttgart | Motor vehicle headlamp with condensation protection - has heat conducting tube, fitted to headlamp reflector |
| AT380329B (en) * | 1983-01-17 | 1986-05-12 | Deubner Franz | DEVICE FOR RECOVERY AND STORAGE OF HEAT FROM WASTEWATER, IN PARTICULAR FROM THE HOUSEHOLD |
| DE102009060439A1 (en) * | 2009-12-22 | 2012-02-02 | Ksb Aktiengesellschaft | Wastewater collection pit |
| DE102010011313A1 (en) * | 2010-03-13 | 2011-11-17 | Jürgen Zimmer | Waste water heat recovery device for use in private and commercial sectors, has container which runs through water, where thermally insulated heat exchanger tubes are equipped in specially arranged manner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2214740A1 (en) * | 1972-03-25 | 1973-09-27 | Inst Fuer Kerntechnik & Energ | Heat conducting device the difference in capillary action provides - unidirectional operat ion |
-
1976
- 1976-08-07 DE DE19762635681 patent/DE2635681A1/en not_active Ceased
-
1977
- 1977-07-18 CH CH886177A patent/CH622092A5/en not_active IP Right Cessation
- 1977-07-21 AT AT528077A patent/AT361669B/en not_active IP Right Cessation
- 1977-07-26 NL NL7708297A patent/NL7708297A/en not_active Application Discontinuation
- 1977-07-27 GB GB31591/77A patent/GB1559937A/en not_active Expired
- 1977-08-02 FR FR7723714A patent/FR2360863A1/en not_active Withdrawn
- 1977-08-03 BE BE179861A patent/BE857427A/en unknown
- 1977-08-05 IT IT68817/77A patent/IT1082253B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124356A (en) * | 1982-07-16 | 1984-02-15 | Charles Henry Busch | Water heating heat exchanger |
| CN100408933C (en) * | 2004-09-02 | 2008-08-06 | 陈喜春 | Gasification coal-saving environmental protection normal pressure hot-water boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| AT361669B (en) | 1981-03-25 |
| CH622092A5 (en) | 1981-03-13 |
| NL7708297A (en) | 1978-02-09 |
| IT1082253B (en) | 1985-05-21 |
| FR2360863A1 (en) | 1978-03-03 |
| ATA528077A (en) | 1980-08-15 |
| DE2635681A1 (en) | 1978-03-23 |
| BE857427A (en) | 1977-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4552208A (en) | Heat actuated system for circulating heat transfer fluids | |
| GB1559937A (en) | Apparatus for recovering heat from waste water | |
| US4548257A (en) | Bayonet tube heat exchanger | |
| GB2173413A (en) | Heat exchanger | |
| CA1055479A (en) | Descaling of heat exchanger | |
| RU2005530C1 (en) | Distillation plant | |
| US6234210B1 (en) | Elliptical heat pipe with carbon steel fins and bonded with zinc galvanizing | |
| JPH0387561A (en) | Heat pipe type hot-water supply apparatus with high temperature heat accumulator | |
| US4444022A (en) | Water heating system | |
| SE469355B (en) | DEVICE FOR HEAT EXCHANGE BETWEEN LIQUIDS USING THE PRINCIPLE PRINCIPLE | |
| US4328683A (en) | Water heating system | |
| SU1134211A1 (en) | Water desalinating plant | |
| JPH07270085A (en) | Heat pipe type heat exchanger | |
| CN215516707U (en) | High-efficient evaporative concentration device of high salt waste water | |
| JPS6338640B2 (en) | ||
| FI83929B (en) | RENGOERINGS- OCH VAERMEAOTERVINNINGSANORDNING FRAON ROEKGASER. | |
| JPH08134963A (en) | Seawater desalination method and device thereof | |
| SU667789A1 (en) | Heat tube | |
| JPS6237318B2 (en) | ||
| JPH1057701A (en) | Evaporation/condensation device | |
| CN207019506U (en) | A kind of fin condenses evaporation and heat-exchange device | |
| SU1326864A1 (en) | Cooling device | |
| JPS5824077Y2 (en) | liquefied natural gas evaporation equipment | |
| JPH0195289A (en) | Heat pipe heat exchanger of separate type | |
| PL122213B1 (en) | Apparatus for desalting of sea water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |