US20180320897A1 - Waste heat recovery - Google Patents

Waste heat recovery Download PDF

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Publication number
US20180320897A1
US20180320897A1 US15/773,309 US201615773309A US2018320897A1 US 20180320897 A1 US20180320897 A1 US 20180320897A1 US 201615773309 A US201615773309 A US 201615773309A US 2018320897 A1 US2018320897 A1 US 2018320897A1
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United States
Prior art keywords
heat transfer
transfer device
furnace
exhaust duct
fluid
Prior art date
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Abandoned
Application number
US15/773,309
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English (en)
Inventor
Stephen Carney
Sebastian Ulmer
Rene' Quist
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Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUIST, RENE, Ulmer, Sebastian
Publication of US20180320897A1 publication Critical patent/US20180320897A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0208—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes using moving tubes
    • 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
    • F28D7/10—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 one within the other, e.g. concentrically
    • F28D7/12—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 one within the other, e.g. concentrically the surrounding tube being closed at one end, e.g. return type
    • 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
    • F28D7/1615—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 the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/10—Movable elements, e.g. being pivotable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Definitions

  • the invention relates to a method for pre-heating a fluid by heat transfer from combustion gases flowing through an exhaust duct of a furnace, wherein the fluid is supplied to a heat transfer device which is in heat transfer contact with the combustion gases.
  • the invention further relates to a furnace with such a heat transfer device.
  • Heat exchanging systems are used for heat recovery from furnaces. Inside the furnace, combustion is conducted by a burner.
  • the burner is supplied with one or more media, e.g. fuel, air, oxygen. Thermal energy of waste gases emerging from the combustion can be used to preheat those media supplied to the burner.
  • recuperators are designed to pre-heat combustion air and thus they are limited for use in air-fuel furnaces.
  • a problem with recuperators is that they have limited operational time but cannot be maintained during furnace operation. Further, it is difficult or even impossible to bypass the recuperator.
  • Another object is to provide an improved heat transfer device which allows to be by-passed and which can be maintained during furnace operation.
  • Another object is to provide a method for preheating gaseous fuel, combustion air and/or oxygen.
  • a fluid to be pre-heated is supplied to the heat transfer device.
  • That fluid can be a fuel, in particular a gaseous fuel, and/or an oxidant, such as combustion air, oxygen-enriched air or pure oxygen.
  • the heat transfer device is designed to be mounted to an exhaust duct of the furnace such that the waste heat of the combustion gases flowing through the exhaust duct can be used to pre-heat the fluid.
  • the heat transfer device comprises one or more double pipes which are movably arranged in the exhaust duct such that they can be moved into and out of the exhaust duct.
  • double pipe shall mean a pipe-in-pipe arrangement of two pipes or tubes. An inner pipe of smaller diameter is placed into an outer pipe of larger diameter.
  • the heat transfer device or a portion of the heat transfer device is movably arranged so that it can be moved into and out of the exhaust duct. By moving the heat transfer device or a portion of it into the exhaust duct the portion of the heat transfer device being in the exhaust duct is heated up by the combustion gases flowing through the exhaust duct. Part of the heat, is, transferred from the combustion gases to the portion of the heat transfer device and to the fluid supplied to the heat transfer device which is thereby pre-heated.
  • exhaust duct shall mean the complete pipe system from the furnace to the outside atmosphere, including the chimney.
  • the exhaust duct normally comprises additional components, for example filters or collectors.
  • the heat transfer device is arranged in a portion of the exhaust duct which runs in a horizontal or nearly horizontal direction. Further, it is of advantage to arrange the heat transfer device at a location which is easy to access, for example at a height of less than 10 meters or less than 5 meters above ground.
  • the heat transfer device can also be located underground.
  • At least a portion of the heat transfer device can be moved into and out of the exhaust duct.
  • the device can be removed from the exhaust duct and from the hot combustion gases and can be easily maintained or repaired.
  • Such maintenance can be carried out during the normal operation of the furnace as the removal of the portion of the heat transfer device out of the exhaust duct does not have a direct effect on the furnace operation. Only the pre-heating of the fluid is interrupted during maintenance of the heat transfer device. However, during the maintenance time it is for example possible to pre-heat the fluid by any other heating means if necessary or desired.
  • the heat transfer device comprises a double pipe.
  • the inner and the outer pipe of the double pipe are straight or unbent pipes.
  • the inner and/or the outer pipe have a U-type design.
  • the inner pipe and the outer pipe are arranged coaxial to each other. But it is also possible that the inner and the outer pipe have different designs.
  • the outer pipe can be U-shaped whereas the inner pipe is straightened.
  • the outer pipe is preferably closed at one end.
  • the inner pipe is open at both ends and a first end of the inner pipe is reset with respect to the closed end of the outer pipe. That means there is a gap between the first end of the inner pipe and the closed end of the outer pipe.
  • the fluid to be pre-heated is supplied via the supply line to the second end of the inner pipe.
  • the fluid travels through the inner pipe, leaves the inner pipe at its first end and enters through the gap the outer pipe.
  • the fluid then flows back through the outer pipe. It is possible to introduce a small part of the fluid to be pre-heated directly into the outer pipe as long as the main portion of the fluid is passed through the inner pipe first. In that case the outer pipe might not be completely closed at its closed end but could be provided with an inlet for the fluid.
  • the combustion gases in the exhaust duct may have a temperature in the range of 300° C. to 1800° C. and could be highly corrosive.
  • the combustion gases may include substances like HCl, HF, SO 2 , CO 2 or H 2 O.
  • the invention is in particular useful when the heat of corrosive combustion gases is used to pre-heat a fluid.
  • combustion gases may include substances like HCl, HF, SO 2 , CO 2 or H 2 O.
  • Typical exhaust duct diameters are in the range of 0.5 to 3 meters, preferably between 1 and 2.5 meter.
  • the term “diameter” shall not only apply to circular exhaust ducts but shall also cover exhaust ducts of non-circular or non-regular shape with an equivalent diameter in the mentioned range.
  • Typical lengths of the exhaust duct are preferably between 2 meter and 10 meters or even more than 10 meters.
  • the portion of the heat exchanger which is introduced into the exhaust duct may for example extend over 30% to 95%, 50% to 90%, 60% to 90% or 70% to 90% of the exhaust duct diameter.
  • the portion of the heat exchanger located inside the exhaust duct has a minimum length of 0.25 m, 1.0 m or 1.5 m. Its maximum length is typically 1.0 m, 1.5 m or 3.0 m.
  • the outer diameter of the portion of the heat exchanger may be between 20 mm and 200 mm, between 30 mm and 80 mm or between 40 mm and 60 mm.
  • the outer diameter determines the heat transfer area and thus the heat transfer. If a double pipe is used as heat exchanger, these ranges correspond to the outer diameter of the outer pipe.
  • the diameter of the inner pipe and/or the diameter of the annular gap between the inner and the outer pipe is preferably chosen so that the velocity of the fluid does not exceed a predefined maximum speed. For example, for safety reasons pre-heated gaseous oxygen should not flow faster than a certain maximum speed.
  • the portion of the heat transfer device is preferably oriented vertically.
  • a vertical arrangement allows to suspend the heat transfer device or the portion of the heat transfer device and to easily lower it down and move it up for entering the exhaust duct or leaving the exhaust duct, respectively. Further, if the heat transfer device has an elongated form, for example as the described straightened double pipe, the bending torque or bending moment on the heat transfer device can be minimised.
  • an automated retraction system for moving the heat exchanger or a portion of the heat exchanger into and out of the exhaust duct.
  • the retraction system is preferably designed to be fail-safe, for example in case of an electrical power failure or electrical power outage. In such cases the retraction system must still be operable.
  • the retraction system automatically retracts the heat transfer device from the exhaust duct in case of emergency.
  • the energy for retraction of the heat transfer device could for example be provided by means of gravity, by means of a pressurized gas storage, a counter weight or a separate stand-alone electric power source.
  • the heat transfer device comprises an inert gas supply line.
  • the inert gas supply provides the capability to purge the double pipe for example prior to or after maintenance work.
  • the inert gas is preferably used to cool the double pipe in case the flow of the fluid to be pre-heated is completely disrupted or if for some reason the fluid flow is too small to guarantee a sufficient cooling of the double pipe.
  • the invention is preferably used in a furnace with one or more burners for pre-heating the oxidant supplied to the burner and/or to pre-heat the fuel supplied to the burner.
  • the heat transfer device is preferably located upstream of any other waste heat recovery devices and any emission control devices.
  • the invention is preferably used to pre-heat an oxygen-containing gas, such as air, oxygen-enriched air or, especially preferred, technical pure oxygen with an oxygen content of at least 90% by volume, of at least 95% by volume or at least 99% by volume.
  • an oxygen-containing gas such as air, oxygen-enriched air or, especially preferred, technical pure oxygen with an oxygen content of at least 90% by volume, of at least 95% by volume or at least 99% by volume.
  • the invention can be used to pre-heat a fuel, especially a gaseous fuel such as natural gas.
  • a fuel especially a gaseous fuel such as natural gas.
  • the pre-heated fluid(s) is/are preferably passed to a burner which is used for heating the furnace.
  • the furnace is provided with more than one burner. In that case it is preferred that the outlet of each heat transfer device is connected to only one burner. That means, the flow of pre-heated fluid is no more split into two or more sub streams but completely passed to one burner.
  • the pre-heated fluid is difficult to handle and a branch off would have to be made of special and expensive material.
  • hot oxygen at temperatures above 200° C., 300° C. or even 400° C. is highly reactive and has a high oxidability.
  • Splitting pre-heated fuel or pre-heated air is less critical and, thus, if only fuel or air is pre-heated, it is possible to split the pre-heated fluid stream and pass it to two or more burners.
  • the two or more heat transfer devices can be arranged in parallel or in series or any combination of parallel and series arrangements.
  • the preheated fluid streams from several heat transfer devices can be passed to the same burner and/or the preheated stream from a heat transfer device can be sent to another heat transfer device for further heating before it is passed to the burner.
  • Some of the heat transfer devices can be used to pre-heat an oxygen containing gas, in particular oxygen, others are used to pre-heat fuel. It is also possible to pre-heat the oxygen containing gas or the fuel containing gas only.
  • the invention is preferably used in a glass furnace as the combustion gases of a glass furnace often contain aggressive and/or corrosive gases.
  • the invention can also be used with advantage in any other kind of industrial furnace, in particular when condensation of components of the combustion gases shall be prevented. Examples of possible applications of the inventions are glass melting furnaces, metal melting furnaces or furnaces for processing or treating ceramic material.
  • FIGS. 1 a and b show a heat transfer device according to the invention
  • FIG. 2 shows another embodiment of the invention
  • FIG. 3 shows an alternative design of a waste heat transfer device of the double pipe design.
  • FIGS. 1 a and 1 b a heat exchanging system according to a preferred embodiment of the invention is schematically shown in a sectional side view.
  • FIGS. 1 a and 1 b show an exhaust duct 100 through which combustion gas 101 emerging from the combustion in a furnace (not shown) is exhausted.
  • the exhaust duct can especially be connected with an appropriate furnace.
  • the exhaust duct can be provided with exhaust treatment components, further waste heat recovery devices and it can especially be connected with an appropriate chimney.
  • the exhaust duct 100 comprises a refractory element 110 .
  • the refractory element 110 is especially embodied as a wall of the exhaust duct 100 .
  • This wall 110 of the exhaust duct 100 is for example constructed by a multitude of bricks.
  • the exhaust duct 100 is provided with an opening 111 at its top side.
  • a heat transfer device 120 can be inserted into the opening 111 and moved into the exhaust duct 100 .
  • the heat transfer device 120 is oriented vertically and fixed to an automated retraction mechanism (not shown) which allows to lift up and lower down the heat transfer device 120 .
  • the combustion gases 101 flow around the lower portion 121 of the heat transfer device 120 and heat it up.
  • the combustion gases typically have a temperature between 300° C. and 1800° C.
  • the heat is transferred from the combustion gases to the gas flowing through the heat transfer device 120 .
  • the heat transfer device 120 is used to preheat oxygen.
  • Gaseous oxygen 140 is passed through the heat transfer device 120 and heated up.
  • the pre-heated oxygen gas 141 is then transferred to a burner for heating the furnace.
  • the heat transfer device 120 may be provided with a collar 123 which fits into the opening 111 in the wall of the exhaust duct 100 and which seals the heat transfer device 120 in its seat in the opening 111 .
  • the oxygen flow 140 into the heat transfer device 120 is controlled by flow control means 150 .
  • Additional heat transfer devices may be used to pre-heat additional oxygen streams or to pre-heat a gaseous fuel stream.
  • the heat transfer device 120 can be lifted up and retracted from the exhaust duct 100 (see FIG. 1 b ).
  • the opening 111 in the wall of the exhaust pipe 100 is closed by a plug 112 to avoid the escape of combustion gases 101 .
  • the oxygen flow 140 continues to flow through heat transfer device 120 even if it is no more pre-heated. It is also possible to have a bypass around the heat transfer device 120 . Thus, maintenance of the heat transfer device 120 can be done during continuous operation of the furnace.
  • FIG. 2 shows a more detailed view of an embodiment of the invention wherein the heat transfer device is designed as a double pipe 200 .
  • a double pipe 200 is oriented with its axis in a vertical direction.
  • the double pipe 200 comprises an inner pipe 201 and an outer pipe 202 coaxially arranged to each other.
  • the outer pipe 202 has an outer diameter of between 30 mm and 100 mm.
  • the inner pipe 201 has an outer diameter between 10 mm and 70 mm.
  • the length of the outer pipe which is located inside the exhaust duct, that is the active heat transfer length is for example between 0.25 m and 2.5 m.
  • the outer pipe 202 is closed at its bottom end 203 .
  • the top end 204 of the inner pipe 201 is designed as inlet for the fluid to be pre-heated, for example for a cold or room-temperature oxygen stream.
  • the bottom end 205 of the inner pipe 201 is open and terminates at a distance of for example 10 mm to 200 mm from the closed bottom end 203 of the outer pipe 202 .
  • an outlet 206 for the pre-heated fluid.
  • Spacers 207 are provided in the annular gap between the outer pipe 202 and the inner pipe 201 .
  • the spacers 207 are preferably provided at a location in the lower third of the outer pipe 202 . It is further advantageous to design the spacers 207 as swirling elements which cause a turbulent flow of the fluid passing the spacers 207 .
  • the double pipe 200 is movably arranged in the wall 110 of the exhaust duct 100 such that it can be inserted into the exhaust duct 100 or be retracted from the exhaust duct 100 .
  • an oxygen stream 240 at ambient temperature is introduced into inlet 204 of the inner pipe 201 .
  • the oxygen stream flows down ( 241 ) the inner pipe 201 , leaves ( 242 ) the inner pipe 201 at its bottom end 205 , turns upwards and flows back ( 243 ) through the annular gap between the outer pipe 202 and the inner pipe 201 .
  • the oxygen stream 244 leaves the double pipe 200 through outlet 206 .
  • the oxygen stream 241 is in heat transfer contact with the oxygen stream 243 flowing upwards through the annular gap.
  • oxygen stream 243 is pre-heated to a temperature between 80° C. and 150° C.
  • the oxygen stream then returns through the annular gap between the outer pipe 202 and the inner pipe 201 .
  • the oxygen stream 243 is in heat transfer contact with the combustion gases 101 flowing through the exhaust duct 100 .
  • the oxygen stream 243 is further heated up to a temperature between 200° C. and 600° C.
  • the so pre-heated oxygen 244 leaves the double pipe 200 via outlet 206 and is passed to a burner.
  • the cold or room-temperature oxygen stream 240 does not come into direct contact with the wall of the outer pipe 202 , that wall remains always at a high enough temperature so that water vapour as a component of the combustion gases does not condense at the wall.
  • the temperature of the wall of the outer pipe 202 is between 200° C. and 1100° C. close to the bottom end 203 of the outer pipe 202 and between 300° C. and 1100° C. at the upper end of the outer pipe 202 .
  • An inert gas supply 245 such as a gaseous nitrogen storage, is also connected to the inlet of the inner pipe 201 .
  • valve 246 is closed and only the fluid 240 to be pre-heated is passed to the inner pipe 201 . If the flow of the fluid 240 is too low or if it is stopped at all, there is a considerable risk that the double pipe 200 is heated up too much and damaged. In this case valve 246 is opened and gaseous nitrogen is introduced into the inner pipe 201 and passed through the outer pipe 202 whereby the double pipe 200 is cooled.
  • the inert gas supply 245 can also be used together with the embodiments of FIGS. 1 a , 1 b and 3 .
  • FIG. 3 shows another design of a double pipe heat transfer device.
  • the outer pipe 302 of the double pipe 300 is of U-shape closed at one end 303 .
  • the inner pipe 301 is designed as inlet for the fluid 340 to be pre-heated, for example for a cold or room-temperature oxygen stream.
  • the inner pipe enters the outer pipe 302 through the closed end 303 .
  • the inner pipe 301 is arranged in the vertical arm of the U-shaped outer pipe 302 .
  • the inner pipe 301 is also of U-type with its outlet 305 close to the closed end 303 of the outer pipe 302 .
  • the double pipe 300 is also movably arranged in the wall 110 of the exhaust duct 100 such that it can be inserted into the exhaust duct 100 or be retracted from the exhaust duct 100 .
  • the refractory is provided with a removable cutout 307 in order to retract the double pipe 300 from the exhaust duct 100 .
  • the operation of the waste heat recovery system of FIG. 3 is very similar to the one of FIG. 2 .
  • An oxygen stream at ambient temperature is introduced into inlet 304 of the inner pipe 301 .
  • the oxygen stream flows through the inner pipe 301 , leaves the inner pipe 301 at its end 305 , turns downwards and flows through the outer pipe 302 .
  • the embodiment of FIG. 3 may in particular be used for pre-heating fluids, such as oxygen or fuel, if the exhaust duct has a small diameter only.
  • the heat transfer length of the embodiment of FIG. 3 is not limited by the diameter of the exhaust duct 100 but can be simply increased by increasing the length of the basis 306 of the U-shaped outer pipe 302 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
US15/773,309 2015-11-04 2016-11-04 Waste heat recovery Abandoned US20180320897A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP15003156.5A EP3165863A1 (en) 2015-11-04 2015-11-04 Waste heat recovery
EP15003156.5 2015-11-04
PCT/EP2016/025137 WO2017076510A1 (en) 2015-11-04 2016-11-04 Waste heat recovery

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US20180320897A1 true US20180320897A1 (en) 2018-11-08

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US15/773,309 Abandoned US20180320897A1 (en) 2015-11-04 2016-11-04 Waste heat recovery

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US (1) US20180320897A1 (pt)
EP (2) EP3165863A1 (pt)
CN (1) CN108351180A (pt)
BR (1) BR112018007397A2 (pt)
WO (1) WO2017076510A1 (pt)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
US20210155522A1 (en) * 2018-04-06 2021-05-27 Corning Incorporated Exhaust conduits for glass melt systems
CN113404475A (zh) * 2021-07-15 2021-09-17 吉林大学 一种用于地下矿产资源原位加热的井下燃烧加热器
KR20220049096A (ko) * 2020-10-13 2022-04-21 한국기계연구원 소각로 내부열을 이용한 요소수 분사장치 및 요소수 분사방법
US11408646B2 (en) * 2019-04-23 2022-08-09 Guangzhou Institute Of Energy Conversion, Chinese Academy Of Sciences Ladder-structural gravity-assisted-heat-pipe geothermal energy recovery system without liquid-accumulation effect
TWI825625B (zh) * 2022-03-17 2023-12-11 岡崎靜明 具有多管式冷卻單元之均溫壓合裝置

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WO2018181325A1 (ja) * 2017-03-28 2018-10-04 住友重機械工業株式会社 空気予熱器

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US3129930A (en) * 1956-12-12 1964-04-21 Establissement Brulex Etude Et Mobile roof burner system for heating of open hearth furnaces or the like
US4901789A (en) * 1987-03-26 1990-02-20 Copermill Limited Heat regenerators
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US20210155522A1 (en) * 2018-04-06 2021-05-27 Corning Incorporated Exhaust conduits for glass melt systems
US11408646B2 (en) * 2019-04-23 2022-08-09 Guangzhou Institute Of Energy Conversion, Chinese Academy Of Sciences Ladder-structural gravity-assisted-heat-pipe geothermal energy recovery system without liquid-accumulation effect
KR20220049096A (ko) * 2020-10-13 2022-04-21 한국기계연구원 소각로 내부열을 이용한 요소수 분사장치 및 요소수 분사방법
KR102464835B1 (ko) * 2020-10-13 2022-11-10 한국기계연구원 소각로 내부열을 이용한 요소수 분사장치 및 요소수 분사방법
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TWI825625B (zh) * 2022-03-17 2023-12-11 岡崎靜明 具有多管式冷卻單元之均溫壓合裝置

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EP3165863A1 (en) 2017-05-10

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