WO2009070129A2 - Combined condensing heat exchanger - Google Patents

Combined condensing heat exchanger Download PDF

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Publication number
WO2009070129A2
WO2009070129A2 PCT/SI2008/000062 SI2008000062W WO2009070129A2 WO 2009070129 A2 WO2009070129 A2 WO 2009070129A2 SI 2008000062 W SI2008000062 W SI 2008000062W WO 2009070129 A2 WO2009070129 A2 WO 2009070129A2
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
tube
condensing heat
flue
exchanger
Prior art date
Application number
PCT/SI2008/000062
Other languages
French (fr)
Other versions
WO2009070129A3 (en
Inventor
Zdravko Molka
Original Assignee
Evrovartrade D.O.O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Evrovartrade D.O.O. filed Critical Evrovartrade D.O.O.
Priority to EP08853457A priority Critical patent/EP2215419A2/en
Publication of WO2009070129A2 publication Critical patent/WO2009070129A2/en
Publication of WO2009070129A3 publication Critical patent/WO2009070129A3/en

Links

Classifications

    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0292—Other particular headers or end plates with fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/06—Safety or protection arrangements; Arrangements for preventing malfunction by using means for draining heat exchange media from heat exchangers

Definitions

  • the innovation object is combined condensing heat exchanger that simultaneously serves for pre-heating entering air in combustion plants as also for transferring the temperature of flue-gases to heating medium that enables lowering the temperature of flue-gases at the exit of combustion plant into the chimney.
  • Innovation belongs to the class F28D 3/00 of international patent classification.
  • the technical problem, successfully solved by submitted combined condensing heat exchanger is a request to additionally improve the recovery of conversion heat energy of exit flue-gases on transition from the furnace to the chimney with removal of heat energy or lowering of temperature of flue-gases with the use of heat exchanger.
  • the device should be able to be easily compounded to existing or new systems for heating the mediums and to combine it also with heat exchanger and enable easy cleaning of the latter.
  • the set technical problem that appears with existing systems for heating the water with different fuels that mainly have comprehensive system of specialized fireplaces and heat transfer to the interior coat in the fireplace boiler or to the interior system of heat exchanger, is relatively high temperature of flue-gases that appear at the exit of the furnace and at the entry into the chimney.
  • the temperature of flue-gases at the exit from the fireplace or furnace can exceed the temperature of 18O 0 C. It is economical to cool the flue gases of such high temperature, or to lower the exit temperature of flue gases to under O 0 C or less.
  • the exit temperature of flue gases can be lowered with heat exchanger, that is with additional pre-heating of heated medium; the rest can be used for additional pre-heating of air, which is needed for burning, supplied into the fireplace.
  • the flue tube can be implemented as double-coated tube with water in the centre.
  • a solution is e.g. described in the document DE 203 07 054 U.
  • Such a solution does not enable larger recovery; besides, sufficiently long implementation is needed for successful transfer of heat or for successful cooling of temperatures of flue gases. Such an implementation cannot be always spatially successfully adjusted.
  • Patent document US 2004206485 describes heat exchanger where the exit flue tube is coated with a tube with water, which is as preliminary heated water connected to the exit of hot consumed water from the boiler in the furnace.
  • the solution does not bring good result in the sense of recovery with temperature of flue gases removal, as the coated tube also cools.
  • the temperature of exit flue gases is actually lowered, but the removed heat is not fully exploited and we use it for heating the space around the furnace, which is, in most cases, not wanted.
  • Combined condensing heat exchanger after the invention solves the set technical problem with installation of condensing tube exchanger in the shape of more tubes, installed in parallel, which have in cross-section round or ellipse shape into the flue tube, where in the assembly of condensing heat exchanger after the invention, high-pressure cleaning is enabled with installation of high-pressure cleaning nozzles, the exterior housing and the coat around the tube exchanger, implemented out of fins, enables successful pre-heating of entering air on its way to the fireplace.
  • FIG. 1 combined condensing heat exchanger after the invention in vertical cross-section
  • Fig. 2 transverse view on combined condensing heat exchanger after the invention in direction A-A with implementation for hot water boiler for burning liquid derivates or gas;
  • Fig. 3 transverse view on combined condensing heat exchanger after the invention in direction A-A with implementation for hot water boiler for burning biomass.
  • Combined condensing heat exchanger after the invention has 1 waterproof installed covers 2 and 9 to the interior housing with suitable tube connections for inflow and outflow of flue gases.
  • the covers 2, 9 are mounted to the housing 1 and suitable sealed with sealing material 8.
  • housing 1 there is condensing tube exchanger 3 installed, housing 1 with covers 2, 9 is coated with exterior housing 4, in which there are entry connection 4a for inflow of cold air and outflow connection 4b for outflow of heated air towards the fireplace are implemented; fins 4c are installed on covers 2, 9.
  • cover 2 of inflow part of condensing heat exchanger after the invention there are high-pressure cleaning nozzles 7 installed, and in the cover 9 of outflow part of condensing heat exchanger after the invention, that simultaneously represents the trap of condensate, there is outlet hole 10 for outflow of the water for washing the tube of condensing tube exchanger 3.
  • Condensing tube exchanger 3 has tubes of round or ellipse shape mounted between two carrying plates.
  • the shape of the tube of condensing tube exchanger 3 depends on the fuel used with combustion plant.
  • the tubes For combustion of fluid derivates (fuel oil) or gas, the tubes have round cross-section whether with furnaces to biomass and similar fuels, the tubes can be of combined shapes, as shown in picture 3.
  • Inflow of fluid medium into the condensing tube exchanger 3 is implemented with the help of tube cowl 6 and the outflow of it through the tube cowl 5.
  • Tube cowl 6 Through suitable flue tube, hot flue gases are flowing into the coat 2. Flue gases flow through inside surface of the tube of condensing tube exchanger 3 and outflow chilled into the cover 9 and through the outflow flue gas further into the chimney.
  • Prompt cleaning of the tube of condensing tube exchanger 3 is enabled with the help of high-pressure cleaning nozzles 7, installed in the wall of coat 2. Cleaning water and eventual condensate is flowed out from the area of coat 8 with the help of drain hole 10.
  • Inflow of fresh air into the fireplace is implemented through the combined condensing heat exchanger in a way that the entry of fresh air into the outer housing 4 is on the lower side through the entry connection 4a. Air then flows throughout the housing 1 and condensing tube exchanger 3 and passing fins 4c that are installed on the outer part of the covers 2, 9. Heated air is then leaded through exit connection 4b till the fireplace of the furnace.
  • Combined condensing heat exchanger after the invention successfully solves set technical problem.
  • Large surface of the tube in condensing tube exchanger 3 and additional air heating in outer housing 4 enables efficient cooling of flue gases.
  • Recovery rate depends also on the definition of the lowest temperature of the heat medium that is heated by flue gases and the purpose of its usage. For additional heating of existing device for obtaining heated sanitary water and heating of entry air till the fireplace in the furnace itself, we can lower the temperature up to 2O 0 C, which improves the recovery of combined condensing heat exchanger after the invention itself.

Abstract

The innovation object is combined condensing heat exchanger that simultaneously serves for pre-heating entering air with combustion plants as also for transferring the temperature of flue-gases to heating medium that enables lowering the temperature of flue-gases at the exit of combustion plant into the chimney. Combined condensing heat exchanger after the invention solves the set technical problem with installation of condensing tube exchanger (3) in the shape of more tubes, installed in parallel, which have in cross-section round or ellipse shape into the flue tube, where in the assembly of condensing heat exchanger after the invention, high-pressure cleaning is enabled with installation of high-pressure cleaning nozzles (7), the exterior housing (4) and fins (4c) on covers (2, 9) enable successful pre-heating of entering air on its way to the fireplace.

Description

COMBINED CONDENSING HEAT EXCHANGER
The innovation object is combined condensing heat exchanger that simultaneously serves for pre-heating entering air in combustion plants as also for transferring the temperature of flue-gases to heating medium that enables lowering the temperature of flue-gases at the exit of combustion plant into the chimney. Innovation belongs to the class F28D 3/00 of international patent classification. The technical problem, successfully solved by submitted combined condensing heat exchanger is a request to additionally improve the recovery of conversion heat energy of exit flue-gases on transition from the furnace to the chimney with removal of heat energy or lowering of temperature of flue-gases with the use of heat exchanger. Besides that, the device should be able to be easily compounded to existing or new systems for heating the mediums and to combine it also with heat exchanger and enable easy cleaning of the latter.
The set technical problem that appears with existing systems for heating the water with different fuels that mainly have comprehensive system of specialized fireplaces and heat transfer to the interior coat in the fireplace boiler or to the interior system of heat exchanger, is relatively high temperature of flue-gases that appear at the exit of the furnace and at the entry into the chimney. The temperature of flue-gases at the exit from the fireplace or furnace can exceed the temperature of 18O0C. It is economical to cool the flue gases of such high temperature, or to lower the exit temperature of flue gases to under O0C or less. The exit temperature of flue gases can be lowered with heat exchanger, that is with additional pre-heating of heated medium; the rest can be used for additional pre-heating of air, which is needed for burning, supplied into the fireplace.
In the sense of known solutions that cool the flue gases with the transfer of the heat to other medium, e.g. water, the flue tube can be implemented as double-coated tube with water in the centre. Such a solution is e.g. described in the document DE 203 07 054 U. Such a solution does not enable larger recovery; besides, sufficiently long implementation is needed for successful transfer of heat or for successful cooling of temperatures of flue gases. Such an implementation cannot be always spatially successfully adjusted.
The solution as described in Swiss application CH 638 884 exploits flow of hot flue gases over two round flat heat transferors for transfer. Also this implementation does not have a good recovery due to relatively small surfaces for heat usage; besides that the interim spaces between the transferors are small, which consequentially means, that soot can quickly accumulate there, which lowers the flow of flue gases. Cleaning of such heat transferor is problematic.
Patent document US 2004206485 describes heat exchanger where the exit flue tube is coated with a tube with water, which is as preliminary heated water connected to the exit of hot consumed water from the boiler in the furnace. The solution does not bring good result in the sense of recovery with temperature of flue gases removal, as the coated tube also cools. The temperature of exit flue gases is actually lowered, but the removed heat is not fully exploited and we use it for heating the space around the furnace, which is, in most cases, not wanted.
According to the described implementations a construction solution that would satisfactory solve set technical problem after the efficient conversion of exit flue gases' heat energy with best possible recovery with their further usage, or, that the combination of additional heating of water and air would be successfully used with the purpose of lowering flue gases' temperature, cannot be found.
Combined condensing heat exchanger after the invention solves the set technical problem with installation of condensing tube exchanger in the shape of more tubes, installed in parallel, which have in cross-section round or ellipse shape into the flue tube, where in the assembly of condensing heat exchanger after the invention, high-pressure cleaning is enabled with installation of high-pressure cleaning nozzles, the exterior housing and the coat around the tube exchanger, implemented out of fins, enables successful pre-heating of entering air on its way to the fireplace.
The invention will be explained in detailed based on implementation case and pertaining pictures, that show:
Fig. 1 combined condensing heat exchanger after the invention in vertical cross-section; Fig. 2 transverse view on combined condensing heat exchanger after the invention in direction A-A with implementation for hot water boiler for burning liquid derivates or gas;
Fig. 3 transverse view on combined condensing heat exchanger after the invention in direction A-A with implementation for hot water boiler for burning biomass.
Combined condensing heat exchanger after the invention has 1 waterproof installed covers 2 and 9 to the interior housing with suitable tube connections for inflow and outflow of flue gases. The covers 2, 9 are mounted to the housing 1 and suitable sealed with sealing material 8. In housing 1 there is condensing tube exchanger 3 installed, housing 1 with covers 2, 9 is coated with exterior housing 4, in which there are entry connection 4a for inflow of cold air and outflow connection 4b for outflow of heated air towards the fireplace are implemented; fins 4c are installed on covers 2, 9. In cover 2 of inflow part of condensing heat exchanger after the invention, there are high-pressure cleaning nozzles 7 installed, and in the cover 9 of outflow part of condensing heat exchanger after the invention, that simultaneously represents the trap of condensate, there is outlet hole 10 for outflow of the water for washing the tube of condensing tube exchanger 3.
Condensing tube exchanger 3 has tubes of round or ellipse shape mounted between two carrying plates. The shape of the tube of condensing tube exchanger 3 depends on the fuel used with combustion plant. For combustion of fluid derivates (fuel oil) or gas, the tubes have round cross-section whether with furnaces to biomass and similar fuels, the tubes can be of combined shapes, as shown in picture 3.
Inflow of fluid medium into the condensing tube exchanger 3 is implemented with the help of tube cowl 6 and the outflow of it through the tube cowl 5. Through suitable flue tube, hot flue gases are flowing into the coat 2. Flue gases flow through inside surface of the tube of condensing tube exchanger 3 and outflow chilled into the cover 9 and through the outflow flue gas further into the chimney. Prompt cleaning of the tube of condensing tube exchanger 3 is enabled with the help of high-pressure cleaning nozzles 7, installed in the wall of coat 2. Cleaning water and eventual condensate is flowed out from the area of coat 8 with the help of drain hole 10. Inflow of fresh air into the fireplace is implemented through the combined condensing heat exchanger in a way that the entry of fresh air into the outer housing 4 is on the lower side through the entry connection 4a. Air then flows throughout the housing 1 and condensing tube exchanger 3 and passing fins 4c that are installed on the outer part of the covers 2, 9. Heated air is then leaded through exit connection 4b till the fireplace of the furnace.
Combined condensing heat exchanger after the invention successfully solves set technical problem. Large surface of the tube in condensing tube exchanger 3 and additional air heating in outer housing 4 enables efficient cooling of flue gases. Recovery rate depends also on the definition of the lowest temperature of the heat medium that is heated by flue gases and the purpose of its usage. For additional heating of existing device for obtaining heated sanitary water and heating of entry air till the fireplace in the furnace itself, we can lower the temperature up to 2O0C, which improves the recovery of combined condensing heat exchanger after the invention itself.

Claims

PATENT CLAIMS
1. Combined condensing heat exchanger, characterized in that, having covers (2, 9) mounted on housing (1), in which there is condensing tube exchanger (3) installed in a waterproof way with suitable sealing material (8); the covers are mounted with tube connectors for inflow and outflow of flue gases and over the housing (1) and covers (2, 9) there is outer housing (4) implemented with entry connection (4a) and exit connection (4b) where the fins (4c) are implemented on covers (2, 9).
2. Combined condensing heat exchanger, according to claim 1 , characterized in that, having cleaning nozzles (7) installed in coat (2) and drain hole (10) for outflow of the water for cleaning the tube of condensing tube exchanger (3) in coat (9).
3. Combined condensing heat exchanger is, according to claims 1 and 2, characterized in that, the condensing tube exchanger (3) has tubes mounted between two carrying plates and tubes are of round or ellipse shape or of combination of both shapes.
PCT/SI2008/000062 2007-11-30 2008-11-27 Combined condensing heat exchanger WO2009070129A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08853457A EP2215419A2 (en) 2007-11-30 2008-11-27 Combined condensing heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI200700311A SI22691A (en) 2007-11-30 2007-11-30 Combined condensation-based heat exchanger
SIP-200700311 2007-11-30

Publications (2)

Publication Number Publication Date
WO2009070129A2 true WO2009070129A2 (en) 2009-06-04
WO2009070129A3 WO2009070129A3 (en) 2009-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SI2008/000062 WO2009070129A2 (en) 2007-11-30 2008-11-27 Combined condensing heat exchanger

Country Status (3)

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EP (1) EP2215419A2 (en)
SI (1) SI22691A (en)
WO (1) WO2009070129A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2365269A1 (en) * 2010-03-03 2011-09-14 Alstom Technology Ltd Heat exchanging and liuid separation apparatus
EP2863157A1 (en) * 2013-10-17 2015-04-22 MAHLE Behr GmbH & Co. KG Heat exchanger
CN115200383A (en) * 2022-09-19 2022-10-18 秦皇岛新特科技有限公司 Condenser for cooling sintering flue gas

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB331140A (en) * 1929-09-11 1930-06-26 United Water Softeners Ltd Improvements relating to the heating of boiler feed water
GB2065861A (en) * 1979-12-14 1981-07-01 Aerco Int Inc Countercurrent heat exchanger with a dimpled membrane
EP0245582A1 (en) * 1986-05-10 1987-11-19 Krupp Koppers GmbH Heat exchanger for gases under elevated pressure
JP2000018882A (en) * 1998-06-29 2000-01-18 Orion Mach Co Ltd Heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB331140A (en) * 1929-09-11 1930-06-26 United Water Softeners Ltd Improvements relating to the heating of boiler feed water
GB2065861A (en) * 1979-12-14 1981-07-01 Aerco Int Inc Countercurrent heat exchanger with a dimpled membrane
EP0245582A1 (en) * 1986-05-10 1987-11-19 Krupp Koppers GmbH Heat exchanger for gases under elevated pressure
JP2000018882A (en) * 1998-06-29 2000-01-18 Orion Mach Co Ltd Heat exchanger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2365269A1 (en) * 2010-03-03 2011-09-14 Alstom Technology Ltd Heat exchanging and liuid separation apparatus
EP2863157A1 (en) * 2013-10-17 2015-04-22 MAHLE Behr GmbH & Co. KG Heat exchanger
CN104567474A (en) * 2013-10-17 2015-04-29 马勒贝洱两合公司 Heat exchanger
CN115200383A (en) * 2022-09-19 2022-10-18 秦皇岛新特科技有限公司 Condenser for cooling sintering flue gas
CN115200383B (en) * 2022-09-19 2022-11-15 秦皇岛新特科技有限公司 Condenser for cooling sintering flue gas

Also Published As

Publication number Publication date
SI22691A (en) 2009-06-30
WO2009070129A3 (en) 2009-07-16
EP2215419A2 (en) 2010-08-11

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