WO2003083397A1 - Reservoir thermique a structure alveolaire, bruleur a stockage thermique utilisant un tel reservoir thermique, four de chauffage et procede de chauffage - Google Patents

Reservoir thermique a structure alveolaire, bruleur a stockage thermique utilisant un tel reservoir thermique, four de chauffage et procede de chauffage Download PDF

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Publication number
WO2003083397A1
WO2003083397A1 PCT/JP2003/003322 JP0303322W WO03083397A1 WO 2003083397 A1 WO2003083397 A1 WO 2003083397A1 JP 0303322 W JP0303322 W JP 0303322W WO 03083397 A1 WO03083397 A1 WO 03083397A1
Authority
WO
WIPO (PCT)
Prior art keywords
honeycomb
heat storage
honeycomb structure
hydraulic diameter
heat
Prior art date
Application number
PCT/JP2003/003322
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiyuki Kasai
Yutaka Suzukawa
Takeshi Tada
Original Assignee
Ngk Insulators, Ltd.
Nkk Corporation
Nippon Furnace Kogyo Kaisha, Ltd.
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 Ngk Insulators, Ltd., Nkk Corporation, Nippon Furnace Kogyo Kaisha, Ltd. filed Critical Ngk Insulators, Ltd.
Priority to AU2003227184A priority Critical patent/AU2003227184A1/en
Publication of WO2003083397A1 publication Critical patent/WO2003083397A1/fr

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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the present invention relates to a honeycomb-shaped regenerator including a plurality of honeycomb structures each including a partition wall and a through hole surrounded by the partition wall, a heat storage burner using the same, and various heating furnaces using the heat storage burner. It relates to the heating method.
  • regenerative burners have been studied for burners used to heat substances from the viewpoint of reducing carbon dioxide and improving combustion efficiency.
  • a regenerative burner is generally equipped with a regenerator in the burner to preheat the gas to be heated, thereby improving the combustion efficiency.
  • saddles, ceramic balls, and the like have been used as heat storage bodies.
  • studies have been made to use a honeycomb structure having a large surface area per volume as a heat storage body with the aim of improving heat exchange efficiency.
  • honeycomb-shaped heat storage element that uses a honeycomb structure as a heat storage element
  • the honeycomb structure may be damaged due to a thermal shock during heat exchange, and such a damage to the honeycomb structure is prevented.
  • a burner having a large output needs to be provided with a heat storage element corresponding to the output, and may use a very large number of honeycomb structures.
  • An object of the present invention is to solve the above-mentioned problems, to make the flow rate of each part of the heat storage unit constant, to increase the heat exchange efficiency, and to extend the life of the heat storage unit,
  • An object of the present invention is to provide a heat storage burner using the same, a heating furnace using the heat storage burner, and a heating method using the heating furnace.
  • the honeycomb heat storage body of the present invention is a honeycomb heat storage body including a plurality of honeycomb structures each including a partition wall and a through hole surrounded by the partition wall.
  • the opening ratio and the hydraulic diameter of Z or the through hole of the honeycomb structure are smaller than the opening ratio of the honeycomb structure installed on the outer periphery and / or the hydraulic diameter of the through hole of the honeycomb structure. Is what you do.
  • the “opening ratio” refers to a percentage of the total area of the through holes with respect to the area of the entire cross section perpendicular to the longitudinal direction of the through holes of the honeycomb structure.
  • the “hydraulic diameter” refers to a value representing the opening area per through hole in a cross section perpendicular to the longitudinal direction of the through hole of the honeycomb structure as an amount corresponding to the diameter of a circular pipe. Therefore, the larger the aperture ratio and the larger the permanent diameter, the more easily the gas passes.
  • the opening ratio of the honeycomb structure installed at the central portion is made smaller than the opening ratio of the honeycomb structure installed at the other outer peripheral portion, or the penetration of the honeycomb structure installed at the central portion is reduced.
  • the hydraulic diameter of the hole smaller than the hydraulic diameter of the through hole of the honeycomb structure installed on the outer peripheral part, the aperture ratio of the honeycomb structure installed at the center part is further reduced.
  • the hydraulic diameter of the through-holes of the honeycomb structure installed at the center and the hydraulic power of the through-holes of the honeycomb structure installed at the outer periphery By making the diameter smaller than the diameter, the difference in flow velocity can be reduced in any case. As a result, the heat exchange efficiency can be improved and the life of the heat storage body can be extended.
  • the present invention by increasing the aperture ratio of the outer peripheral portion, the amount of heated gas or heated gas flowing in the outer peripheral portion increases. As a result, the difference between the flow velocities is reduced. Ma In addition, the same effect can be expected by increasing the hydraulic diameter of the flow hole in the outer peripheral portion of the honeycomb structure, and preferably both are performed.
  • Such a honeycomb-shaped regenerator suitably acts on a burner in which the time for switching between the heated gas and the gas to be heated is 60 seconds or less.
  • High-speed switching type wrench can set high heat exchange efficiency, and therefore generally uses honeycomb structure as heat storage.
  • the flow velocity is set high, the flow velocity distribution is generally easy to be obtained. Therefore, the present invention can be used more suitably.
  • the flow rate of the heat storage element of the present invention is constant, the life of the heat storage element is extended even in the case of a heating furnace in which the substance to be heated is a substance that easily reacts with the honeycomb structure such as steel. This is preferable.
  • FIG. 1 is a diagram showing a configuration of an example of a honeycomb structure constituting a honeycomb-shaped heat storage body of the present invention.
  • FIG. 2 is a diagram showing a configuration of an example of the honeycomb heat storage body of the present invention.
  • FIG. 3 is a diagram showing a configuration of an example of the heat storage burner of the present invention.
  • FIG. 4 is a diagram showing a configuration of an example of the switchable heat storage burner of the present invention.
  • FIG. 1 is a diagram showing a configuration of an example of a honeycomb structure constituting a honeycomb-shaped heat storage body of the present invention.
  • a honeycomb structure 1 constituting the honeycomb heat storage body of the present invention has a plurality of through-holes 3 formed in parallel with each other inside a outer wall 2 by partition walls 4. It is configured.
  • the honeycomb structure 1 can be made of any material such as anoremina, cordierite, and mullite which has been conventionally used as a honeycomb structure of a honeycomb-shaped heat storage body.
  • the structure and manufacturing method are the same as those conventionally known.
  • FIG. 2 is a diagram showing a configuration of an example of the honeycomb heat storage body of the present invention.
  • the honeycomb-shaped heat storage body 11 is configured by stacking a plurality of the above-described rectangular parallelepiped honeycomb structures 1 so that the flow paths constituted by the through holes 3 are aligned in one direction. I have.
  • 10 ⁇ 10 honeycomb structures 1 on one plane are stacked in 10 layers.
  • the feature of the honeycomb-shaped heat storage body of the present invention is that the opening ratio of the honeycomb structure 11 installed in the central portion is made smaller than the opening ratio of the honeycomb structure 11 installed in the other outer peripheral portion.
  • the hydraulic diameter of the through-hole 3 of the honeycomb structure 111 installed in the center portion is made smaller than the hydraulic diameter of the through-hole 3 of the honeycomb structure 112 installed in the other outer peripheral portion.
  • the opening ratio of the honeycomb structure 111 installed in the center part smaller than the opening ratio of the honeycomb structure 1_2 installed in the other outer peripheral part, and the honeycomb structure installed in the center part. This is to make the hydraulic diameter of the through-hole 3 of the first and the second smaller than the hydraulic diameter of the through-hole 3 of the honeycomb structure 1-2 installed on the other outer peripheral portion.
  • honeycomb structures 11 including the center of the honeycomb-shaped heat storage body 11 are used as the honeycomb structures 11 to be installed at the center, and the other honeycomb structures are arranged on the outer periphery.
  • the honeycomb structure is installed in the section.
  • the configuration of the honeycomb structure on the 10 plane in the stacking direction is all the same as the configuration including the honeycomb structure 11 1 in the central portion and the honeycomb structure 1-2 in the outer peripheral portion.
  • the central honeycomb structure 111 and the outer peripheral honeycomb structure 112 can be formed.
  • the aperture ratio can be different.
  • FIG. 3 is a diagram showing a configuration of an example of the heat storage burner of the present invention.
  • the heat storage burner 21 of the present invention is a heat storage body in which a honeycomb-shaped heat storage body 11 having the structure shown in FIG. Vessel 22, connection duct 23 provided at one end of heat storage vessel 22 for connection to a heating furnace (not shown), ignition plug 24 provided at connection duct 23, and fuel inlet 2 5, a connection duct 28 for connecting the heated gas introduction duct 26 and the exhaust gas discharge duct 27 provided at the other end of the heat storage container 22, and a heated gas duct 2 6 and exhaust gas exhaust And switching valves 29-1, 29-2 provided in each of the cuts 27.
  • the switching valve 29_1 is opened and the switching valve 29-2 is closed.
  • the heating gas is introduced into the heat storage container 22 from the heated gas introduction duct 26 via the connection duct 28. Then, the introduced heated gas is heated by passing through the honeycomb-shaped regenerator 11 in a state where the heat is stored, and is burned together with the fuel supplied from the fuel inlet 25 using the ignition plug 24, and is transferred to the heating furnace. Supply.
  • the switching valve 29-1 is closed and the switching valve 29_2 is opened.
  • connection duct 23 Is introduced into the heat storage container 22 through the connection duct 23. Then, the introduced high-temperature exhaust gas passes through the honeycomb-shaped regenerator 11 to store heat, and is discharged from the exhaust gas discharge duct 27 via the connection duct 28.
  • FIG. 4 is a diagram showing a configuration of an example of the switchable heat storage burner of the present invention.
  • the switchable heat storage burner 31 of the present invention shown in FIG. 4 two heat storage burners 21-1 and 21-2 of the present invention having the structure shown in FIG. 3 are provided at both ends of the heating furnace 32. I have.
  • two heat storage burners 21-1 and 21-2 are provided because one of them is in the heat storage state by flowing high-temperature exhaust gas, and the other is the inflow of the gas to be heated. This is so as to achieve a heat radiation state, thereby effectively performing heat exchange.
  • a switchable heat storage burner is used in a heating furnace, a plurality of burner pairs may be used. In that case, the present invention is not necessarily applied to all the burner pairs, and it is effective to apply the present invention to a burner partially exposed to a high temperature.
  • the thermal efficiency does not deteriorate due to the honeycomb-shaped regenerator 11, so the total cost and the heating Manufacturing costs can be reduced. Further, by using the steel heating furnace, it is possible to achieve a reduction in the total cost and a reduction in the production cost of the workpiece as in the heating furnace described above.
  • a heat storage burner 21 having a honeycomb-shaped heat storage body 11 having a central portion and an outer peripheral portion shown in FIG. 2 and having the configuration shown in FIG. 3 was prepared as heat storage body configurations 2 to 4 of the present invention. As shown in Table 1 below, honeycomb structures having various cell structures, aperture ratios, and hydraulic diameters were used for the heat storage units 2 to 4. At the same time, a heat storage burner 21 having the configuration shown in FIG. 3 was prepared as the heat storage element configuration 1 of the conventional example, provided with a honeycomb-shaped heat storage element in which all conventional honeycomb structures were the same.
  • the flow velocity at the upper portion of the honeycomb-shaped heat storage body 11 was measured at each of the central part and the outer peripheral part using a hot wire anemometer. Further, the prepared heat storage burners 21 of the present invention example and the conventional example were used as a burner for a steel heating furnace for 6 months, and the condition of the honeycomb-shaped heat storage body 21 was confirmed. The results are shown in Table 1 below.
  • Heat storage unit configuration 1 Heat storage unit configuration 2 Heat storage unit configuration 3 Heat storage unit configuration 4 Position Central part Outer part Center part Outer part Central part Outer part Central part Outer part
  • the present invention has the same opening ratio at the center and outer periphery but different hydraulic diameters compared to the conventional heat storage unit configuration 1 in which the opening ratio and hydraulic diameter are the same at the center and outer periphery.
  • the flow velocity is uniform and the steel material generated in the conventional heat storage structure 1
  • the heat storage structure 4 in which both the opening ratio and the hydraulic diameter were different at the central portion and the outer peripheral portion could make the flow velocity more uniform than the heat storage structures 2 and 3. . From the above, it was confirmed that the life of the heat storage element can be extended by applying the present invention.
  • the opening ratio of the honeycomb structure installed at the center is made smaller than the opening ratio of the honeycomb structures installed at the other outer peripheral portions.
  • the hydraulic diameter of the through-hole of the honeycomb structure installed at the center is made smaller than the hydraulic diameter of the through-hole of the honeycomb structure installed at the other outer periphery.
  • the opening ratio of the honeycomb structure to be installed is made smaller than the opening ratio of the honeycomb structure to be installed at the other outer peripheral portion, and the hydraulic diameter of the through-hole of the honeycomb structure to be installed at the center is reduced by Since the diameter is smaller than the hydraulic diameter of the through hole of the honeycomb structure installed on the outer periphery, the flow velocity can be kept constant in any case. As a result, the heat exchange efficiency can be increased and the life of the heat storage body can be extended.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)

Abstract

L'invention concerne un réservoir thermique (11) à structure alvéolaire et un brûleur à stockage thermique utilisant un tel réservoir thermique. Le réservoir thermique à structure alvéolaire comprend plusieurs corps structurels alvéolaires dotés de parois de séparation et de trous traversant entourés par les parois de séparation. Le rapport d'ouverture du corps structurel alvéolaire (1-1) placé sur une partie centrale et/ou le diamètre hydraulique du trou traversant du corps structurel alvéolaire (1-1) est plus petit que le rapport d'ouverture du corps structurel alvéolaire (1-2) placé sur les parties périphériques extérieures autres que la partie centrale et/ou le diamètre hydraulique du trou traversant du corps structurel alvéolaire (1-2), ce qui permet de maintenir un écoulement constant de chaque côté du réservoir thermique, d'augmenter le rendement de l'échange thermique, et d'allonger la durée de vie du réservoir thermique.
PCT/JP2003/003322 2002-03-28 2003-03-19 Reservoir thermique a structure alveolaire, bruleur a stockage thermique utilisant un tel reservoir thermique, four de chauffage et procede de chauffage WO2003083397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003227184A AU2003227184A1 (en) 2002-03-28 2003-03-19 Honeycomb heat reservoir, heat storage burner using the heat reservoir, heating furnace, and heating method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002091011A JP2003287379A (ja) 2002-03-28 2002-03-28 ハニカム状蓄熱体及びそれを用いた蓄熱バーナー
JP2002-91011 2002-03-28

Publications (1)

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WO2003083397A1 true WO2003083397A1 (fr) 2003-10-09

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JP (1) JP2003287379A (fr)
AU (1) AU2003227184A1 (fr)
WO (1) WO2003083397A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100578134C (zh) * 2007-04-26 2010-01-06 武汉钢铁(集团)公司 一种陶瓷蓄热体

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015210064A (ja) * 2014-04-30 2015-11-24 東京窯業株式会社 蓄熱体
JP2016001090A (ja) * 2014-06-12 2016-01-07 東京窯業株式会社 蓄熱式バーナ用耐熱材料
JP6305378B2 (ja) * 2015-08-04 2018-04-04 東京窯業株式会社 蓄熱体
US11985795B2 (en) 2019-05-21 2024-05-14 Tomoegawa Corporation Temperature control unit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09203517A (ja) * 1997-03-05 1997-08-05 Nippon Furnace Kogyo Kaisha Ltd 産業用燃焼装置の燃焼方法
JP2738654B2 (ja) * 1994-10-18 1998-04-08 日本碍子株式会社 ハニカム状蓄熱体
JPH1130491A (ja) * 1997-07-10 1999-02-02 Ngk Insulators Ltd ハニカム状蓄熱体
JPH11211372A (ja) * 1998-01-27 1999-08-06 Nippon Furnace Kogyo Kaisha Ltd 蓄熱体の自己補修方法及びその機能を有する蓄熱体
JP2944301B2 (ja) * 1992-05-21 1999-09-06 アイシン精機株式会社 スターリング機関用蓄熱器
US6062297A (en) * 1998-02-27 2000-05-16 Ngk Insulators, Ltd. Honeycomb regenerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2944301B2 (ja) * 1992-05-21 1999-09-06 アイシン精機株式会社 スターリング機関用蓄熱器
JP2738654B2 (ja) * 1994-10-18 1998-04-08 日本碍子株式会社 ハニカム状蓄熱体
JPH09203517A (ja) * 1997-03-05 1997-08-05 Nippon Furnace Kogyo Kaisha Ltd 産業用燃焼装置の燃焼方法
JPH1130491A (ja) * 1997-07-10 1999-02-02 Ngk Insulators Ltd ハニカム状蓄熱体
JPH11211372A (ja) * 1998-01-27 1999-08-06 Nippon Furnace Kogyo Kaisha Ltd 蓄熱体の自己補修方法及びその機能を有する蓄熱体
US6062297A (en) * 1998-02-27 2000-05-16 Ngk Insulators, Ltd. Honeycomb regenerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100578134C (zh) * 2007-04-26 2010-01-06 武汉钢铁(集团)公司 一种陶瓷蓄热体

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AU2003227184A1 (en) 2003-10-13
JP2003287379A (ja) 2003-10-10

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