EP2924384A1 - Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung - Google Patents

Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung Download PDF

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Publication number
EP2924384A1
EP2924384A1 EP14161227.5A EP14161227A EP2924384A1 EP 2924384 A1 EP2924384 A1 EP 2924384A1 EP 14161227 A EP14161227 A EP 14161227A EP 2924384 A1 EP2924384 A1 EP 2924384A1
Authority
EP
European Patent Office
Prior art keywords
cooling
exhaust gas
cooling gas
countercurrent
gas
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.)
Withdrawn
Application number
EP14161227.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Schmiedberger
Dietmar Steiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to EP14161227.5A priority Critical patent/EP2924384A1/de
Priority to EP15741781.7A priority patent/EP3123092B1/de
Priority to TR2019/09188T priority patent/TR201909188T4/tr
Priority to PCT/EP2015/056171 priority patent/WO2015144651A2/de
Priority to CN201580016010.7A priority patent/CN106461358A/zh
Priority to RU2016137902A priority patent/RU2677555C2/ru
Publication of EP2924384A1 publication Critical patent/EP2924384A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • 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
    • F28D7/06—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 having a single U-bend
    • 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
    • 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
    • F28D7/1607—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 particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28G7/00—Cleaning by vibration or pressure waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow

Definitions

  • the invention relates to a method for cooling exhaust gas, wherein the exhaust gas is cooled by a cooling gas by means of indirect heat transfer, and a device for carrying out the method.
  • Dust-laden exhaust gas from industrial processes often has a high temperature.
  • gas cleaning filter systems are often used, which have only a limited temperature resistance.
  • exhaust gas streams whose temperature is above the maximum sustainable temperature of the filter systems, cooled in cooling units before they are fed to the filter units.
  • This is known, for example, in steel mill dedusting the use of cooling methods in which by direct heat transfer in a Verdampfungskühler- also called Quenching tower-, or by indirect heat transfer in a Warzugkühlerauch called Hairpin cooler - or in a tube or plate heat exchanger - also called forced draft cooler - Is cooled with cross flow principle.
  • Another unfavorable aspect are due to thermal stresses in the material of the cooling unit existing restrictions on the temperature of the exhaust gas when entering the cooling unit, which may make an upstream cooling step necessary.
  • common plate heat exchangers in which ambient air is used as a cooling medium, can be used only up to about 650 ° C exhaust gas temperature at the inlet of the exhaust gas.
  • This object is achieved by a method for cooling exhaust gas, wherein the exhaust gas is cooled by a cooling gas by means of indirect heat transfer, characterized in that for the cooling gas, the flow direction changed at least once, preferably reversed, and the exhaust gas is cooled countercurrently ,
  • the refrigerant gas after reversal flows in the opposite direction compared to its direction of flow before the reversal.
  • the cooling gas may flow first from top to bottom and after the reversal from bottom to top.
  • the hottest - ie the entering into the cooling unit - exhaust gas meets by already carried out indirect heat transfer maximum preheated cooling gas.
  • the temperature differences to which the material of the cooling unit is exposed when the exhaust gas enters are reduced.
  • they can be used for higher exhaust gas temperatures than previously used heat exchangers with crossflow of the cooling gas or natural draft coolers with indirect heat transfer.
  • conventional cross-flow heat exchangers can be used, for example, only up to about 650.degree. C.
  • the process control according to the invention allows safe operation at inlet temperatures of up to about 750.degree.
  • the temperature difference between two media determines the efficiency of heat transfer between them.
  • the amount of temperature difference over a long distance is favorable for efficient heat transfer. Accordingly, can be cooled more efficiently with the countercurrent principle than, for example, in a cross-flow heat exchanger of the cooling gas.
  • the cooling according to the invention uses less cooling gas. This is hotter at the exit than at cross-storm cooling. Since less but hotter cooling gas is produced, the cooling gas is also better usable elsewhere.
  • the cooling gas is supplied to the cooling of the exhaust gas use of its heat content.
  • the cooling according to the invention is effective in comparison with cooling with crossflow with less cooling gas. This is hotter at the exit than at
  • the supply of cooling gas is controlled continuously.
  • the supply of cooling gas can be fine-tuned to the actual needs of cooling gas. This reduces the consumption of cooling gas and the consumption of energy for the supply of cooling gas, for example, compared to a common in plate heat exchangers with cross flow of the cooling gas discrete control - overall, the process is more efficient.
  • the cooling gas is air. Air is readily available cheaply with reasonable temperatures without effort.
  • the exhaust gas originates from a metallurgical plant.
  • Metallurgical plants such as converters, electric arc furnace, AOD, ladle furnace, sintering belt, blast furnace and other reduction units. It can also come from combinations or from several such metallurgical plants. Preferably it comes from a steel plant.
  • the exhaust gas has a high temperature, which makes the cooling consuming and difficult.
  • the inventive method is as described above for exhaust gases with high temperatures particularly well suited.
  • the flow direction is changed at least once for the exhaust gas, preferably vice versa.
  • the exhaust gas can follow the reversal of the flow direction of the cooling gas well and a large Ensure area for heat transfer, which improves the cooling effect.
  • baffles are preferably installed at the point of change or reversal point.
  • Baffles in the countercurrent exhaust duct also increase the heat exchange surface and thereby contribute to improved cooling. In addition, they reduce the pressure loss when flowing through the channels.
  • the exhaust gas is supplied to the cooling at a temperature above 600 ° C., preferably above 650 ° C., very particularly preferably above 680 ° C., very preferably above 700 ° C.
  • a temperature above 600 ° C. preferably above 650 ° C., most preferably above 680 ° C, most preferably above 700 ° C.
  • temperatures of up to 750 ° C can be controlled.
  • a temperature range which is customary for crossflow cooling for the inlet temperature of exhaust gas to be cooled from 300 to 600 ° C. can be extended to 300 to 750 ° C.
  • the at least two sections of the counterflow cooling gas channel with different oriented longitudinal directions are largely vertical. In this way, the savings of required footprint can be maximized.
  • the countercurrent cooling gas duct opens into a cooling gas discharge line. This makes it easy to supply the heated cooling gas to use its heat content of other use.
  • the cooling gas supply line comprises devices for the continuous regulation of the flow of cooling gas.
  • a plurality of horizontally juxtaposed, countercurrent cooling gas ducts are present, and there are a plurality of cooling gas supply ducts, each lead into its own countercurrent cooling gas channel.
  • the device is erected standing on a floor, wherein the cooling gas supply line at least one fan, preferably only a blower, characterized in that the blower is mounted at the level of the floor.
  • the cooling gas supply line at least one fan, preferably only a blower, characterized in that the blower is mounted at the level of the floor.
  • the countercurrent exhaust gas channel also has at least two sections with differently oriented longitudinal directions, which are preferably parallel.
  • the at least two sections of the countercurrent exhaust gas duct with differently oriented longitudinal directions are largely vertical.
  • a transition section between the at least two sections of the countercurrent exhaust gas duct with different oriented longitudinal directions comprising a dust discharge device.
  • Dust in the exhaust gas for example coarse particles entrained in the exhaust gas, will preferably be deposited in regions of the countercurrent exhaust gas duct, in the vicinity of which a change in the direction of flow takes place.
  • the provision of dust discharge devices in such locations facilitates the removal of this dust from the counterflow exhaust passage;
  • Staubaustragsvorraumen lie at the lowest point of the countercurrent exhaust duct, for example, where there is a reversal of the flow direction.
  • sparks carried along by the exhaust gas are also deposited in regions of the countercurrent exhaust gas duct, in the environment of which a change in the direction of flow takes place.
  • the Staubaustragsvoriques may be, for example, a rotary valve or a screw or a chain conveyor.
  • a forced draft condenser according to the invention can thus also be regarded as a spark arrester.
  • cooling baffles may be provided in the counterflow exhaust passage and / or countercurrent cooling gas passage.
  • several devices may be present. For example, two, three or more such devices are then flowed through in parallel by exhaust gas, it being preferred to supply them with exhaust gas, for example via a common exhaust pipe. From this exhaust pipe then the respective exhaust gas supply lines of the individual devices can go out. Accordingly, it is also preferred in such a case to let the exhaust gas discharge lines of the individual devices lead into a discharge. This reduces the construction costs.
  • FIG. 1 schematically shows a device 1 according to the invention with an exhaust gas supply line 2, an exhaust discharge line 3, a cooling gas supply line 4. It is characterized in that the cooling gas supply line 4 opens into a countercurrent cooling gas channel 5, the exhaust gas supply line opens into a counterflow exhaust passage 6, and the counterflow exhaust passage 6 opens into the exhaust gas discharge line 3.
  • the countercurrent cooling gas duct 5 and countercurrent exhaust duct 6 are designed for mutual indirect countercurrent gas-gas heat transfer.
  • the countercurrent cooling gas channel 5 here has two sections 7, 8, each of which is vertical and parallel to one another, with different oriented longitudinal directions.
  • the exhaust gas represented by corrugated arrows, by the cooling gas - in the present case, air serves as a cooling gas, ie cooling air - represented by transparent arrows, cooled by indirect heat transfer.
  • a cooling gas ie cooling air - represented by transparent arrows
  • the transition between the sections 7,8 is shown with dashed border as he in the representation of FIG. 1 at a height with a portion of the counterflow exhaust passage 6 extends.
  • the arrow representing the cooling gas is shown surrounded by dashed lines in this transition.
  • the exhaust gas comes from a metallurgical plant, for example from a converter, and is supplied to the cooling at a temperature up to 700 ° C.
  • the exhaust gas is cooled countercurrently.
  • the counterflow exhaust passage 6 has two vertical, parallel sections with different oriented longitudinal directions; between these, the flow direction is reversed for the exhaust gas.
  • a transition section 9 between the two vertical sections of the countercurrent exhaust duct 6 comprises a dust discharge device 10, shown a rotary valve.
  • the countercurrent cooling gas channel 5 opens into a cooling gas discharge line 11. This makes it possible, after cooling the exhaust gas, the heated cooling gas for the use of his Heat content via the cooling gas discharge line 11 to supply a use of its heat content, which is not shown for clarity sake extra.
  • the supply of cooling gas is controlled continuously, including the cooling gas supply line 4 devices 12 for continuous control of the flow of cooling gas.
  • the cooling air could also be discreet, that is on / off, regulated.
  • baffles are indicated in the countercurrent cooling gas channel 5 and countercurrent exhaust duct 6, with which change in the flow direction and cooling effect are supported while reducing the pressure loss when flowing through the channels.
  • FIG. 2 schematically shows an overall spatial view of a device according to the invention, in which three lines of exhaust gas and cooling gas are flowed through side by side, being supplied via a common exhaust gas supply line 2 to be cooled exhaust gas.
  • the device is erected standing on a floor 14, wherein the cooling gas supply lines 13a, 13b, 13c each have a fan 15a, 15b, 15c, which are mounted at the level of the floor and are continuously or discretely adjustable.
  • the 3 blowers could be replaced by a single larger one. Then, the cooling air supply to this fan is split to the respective countercurrent refrigerant gas channels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Separating Particles In Gases By Inertia (AREA)
EP14161227.5A 2014-03-24 2014-03-24 Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung Withdrawn EP2924384A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP14161227.5A EP2924384A1 (de) 2014-03-24 2014-03-24 Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung
EP15741781.7A EP3123092B1 (de) 2014-03-24 2015-03-24 Gegenstrom wärmetauscher für staubbeladenes abgas metallurgischer anlagen
TR2019/09188T TR201909188T4 (tr) 2014-03-24 2015-03-24 Metalurji tesislerinin toz yüklü atık gazı için ters akışlı ısı eşanjörü.
PCT/EP2015/056171 WO2015144651A2 (de) 2014-03-24 2015-03-24 Gegenstrom wärmetauscher für staubbeladenes abgas metallurgischer anlagen
CN201580016010.7A CN106461358A (zh) 2014-03-24 2015-03-24 用于冶金装备的含尘废气的逆流式热交换器
RU2016137902A RU2677555C2 (ru) 2014-03-24 2015-03-24 Противоточный теплообменник для запыленного отходящего газа металлургических установок

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14161227.5A EP2924384A1 (de) 2014-03-24 2014-03-24 Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung

Publications (1)

Publication Number Publication Date
EP2924384A1 true EP2924384A1 (de) 2015-09-30

Family

ID=50343678

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14161227.5A Withdrawn EP2924384A1 (de) 2014-03-24 2014-03-24 Gegenstrom Wärmetauscher mit erzwungener Gas/Luft-Führung
EP15741781.7A Active EP3123092B1 (de) 2014-03-24 2015-03-24 Gegenstrom wärmetauscher für staubbeladenes abgas metallurgischer anlagen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15741781.7A Active EP3123092B1 (de) 2014-03-24 2015-03-24 Gegenstrom wärmetauscher für staubbeladenes abgas metallurgischer anlagen

Country Status (5)

Country Link
EP (2) EP2924384A1 (ru)
CN (1) CN106461358A (ru)
RU (1) RU2677555C2 (ru)
TR (1) TR201909188T4 (ru)
WO (1) WO2015144651A2 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3567329A1 (de) * 2018-05-09 2019-11-13 Linde Aktiengesellschaft Kondensatextraktionsvorrichtung und wärmetauscher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114710A1 (de) * 2016-08-09 2018-02-15 Thyssenkrupp Ag Plattenwärmetauscher, Synthesevorrichtung und Verfahren zur Herstellung eines Produkts

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378715A (en) * 1920-09-11 1921-05-17 Nielsen Harald Heat-exchange apparatus
GB1001095A (en) * 1964-01-30 1965-08-11 Ramens Patenter Ab Heat exchanger
WO1985002671A1 (en) * 1983-12-07 1985-06-20 Licencia Találmányokat Értékesito^" Vállalat Process and collecting heat exchange plant for removing polluted hot air impurities, particularly from flue gas and for reducing the corrosion of chimneys
EP0631037A1 (fr) * 1993-06-23 1994-12-28 Valeo Thermique Moteur Echangeur de chaleur à filtre intégré
JPH08261669A (ja) * 1995-03-27 1996-10-11 Sanden Corp 熱交換器
US20070023174A1 (en) * 2004-12-17 2007-02-01 Viktor Brost Heat exchanger with partial housing
US20080022684A1 (en) * 2006-07-31 2008-01-31 Caterpillar Inc. Segmented heat exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842904A (en) * 1972-06-15 1974-10-22 Aronetics Inc Heat exchanger
RU2104454C1 (ru) * 1992-10-27 1998-02-10 Акционерное общество открытого типа "Уралэнергоцветмет" Теплоутилизационный агрегат-охладитель отходящих печных газов
DE19801753A1 (de) * 1998-01-20 1999-07-22 Ibb Engineering Gmbh Verfahren zur Kühlung oder Aufheizung nicht-rieselfähiger Schüttgüter
FR2878318B1 (fr) * 2004-11-22 2007-03-30 Air Liquide Echangeur de chaleur indirect

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378715A (en) * 1920-09-11 1921-05-17 Nielsen Harald Heat-exchange apparatus
GB1001095A (en) * 1964-01-30 1965-08-11 Ramens Patenter Ab Heat exchanger
WO1985002671A1 (en) * 1983-12-07 1985-06-20 Licencia Találmányokat Értékesito^" Vállalat Process and collecting heat exchange plant for removing polluted hot air impurities, particularly from flue gas and for reducing the corrosion of chimneys
EP0631037A1 (fr) * 1993-06-23 1994-12-28 Valeo Thermique Moteur Echangeur de chaleur à filtre intégré
JPH08261669A (ja) * 1995-03-27 1996-10-11 Sanden Corp 熱交換器
US20070023174A1 (en) * 2004-12-17 2007-02-01 Viktor Brost Heat exchanger with partial housing
US20080022684A1 (en) * 2006-07-31 2008-01-31 Caterpillar Inc. Segmented heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3567329A1 (de) * 2018-05-09 2019-11-13 Linde Aktiengesellschaft Kondensatextraktionsvorrichtung und wärmetauscher
WO2019214849A1 (de) * 2018-05-09 2019-11-14 Linde Aktiengesellschaft Kondensatextraktionsvorrichtung und wärmetauscher

Also Published As

Publication number Publication date
RU2016137902A (ru) 2018-04-26
EP3123092A2 (de) 2017-02-01
RU2016137902A3 (ru) 2018-11-13
RU2677555C2 (ru) 2019-01-17
CN106461358A (zh) 2017-02-22
WO2015144651A3 (de) 2015-11-19
TR201909188T4 (tr) 2019-07-22
WO2015144651A2 (de) 2015-10-01
EP3123092B1 (de) 2019-05-08

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