WO2010057439A1 - Procédé et système pour réutiliser les fumées d’un refroidisseur circulaire, et refroidisseur circulaire - Google Patents

Procédé et système pour réutiliser les fumées d’un refroidisseur circulaire, et refroidisseur circulaire Download PDF

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Publication number
WO2010057439A1
WO2010057439A1 PCT/CN2009/075050 CN2009075050W WO2010057439A1 WO 2010057439 A1 WO2010057439 A1 WO 2010057439A1 CN 2009075050 W CN2009075050 W CN 2009075050W WO 2010057439 A1 WO2010057439 A1 WO 2010057439A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
ring
high temperature
duct
air duct
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.)
Ceased
Application number
PCT/CN2009/075050
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English (en)
Chinese (zh)
Inventor
高德亮
戴传德
刘相佩
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.)
Zhongye Changtian International Engineering Co Ltd
Original Assignee
Zhongye Changtian International Engineering Co 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 Zhongye Changtian International Engineering Co Ltd filed Critical Zhongye Changtian International Engineering Co Ltd
Publication of WO2010057439A1 publication Critical patent/WO2010057439A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F27D17/10—Arrangements for using waste heat
    • F27D17/17—Arrangements for using waste heat for preheating fluids, e.g. air or gases
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling

Definitions

  • the invention relates to the field of iron and steel smelting, in particular to a method and system for recycling flue gas of a ring cooler, and a ring cooler.
  • a ring cooler In steel smelting, a ring cooler is used to cool the sintered material.
  • the ring cooler is generally circular, and the sintered material is run through the trolley for one week in the ring cooler to complete cooling and unloading.
  • a cross-sectional view of the ring cooler 10 radial (pointing to the center of the ring cooler) is completed, and the sintered material is disposed on the raft 12 of the trolley 11, and the trolley 11 rotates at a constant speed around the center of the ring chiller 10.
  • the blown cold air blown by the blower enters the trolley from the bottom up through the seesaw 12, and after the material on the seesaw 12 is sufficiently heat-exchanged, the hot flue gas is discharged from the exhaust duct 13.
  • FIG. 2 is an overall schematic diagram of the ring cooler 10, the ring cooler 10 is divided into a high temperature zone I zone, a middle temperature zone II zone, a low temperature zone zone and a non-cool zone zone IV, and the sintering machine (not shown) is completed.
  • the sintered material is transported to the trolley 11 of the ring cooler 10 in the high temperature zone I.
  • the material temperature is between 700 ° C and 800 ° C, and the cooling air at normal temperature is in sufficient heat exchange with the material in the high temperature zone I. Thereafter, it becomes a high-temperature flue gas having a temperature of 350 ° C to 400 ° C and is discharged from the exhaust flue 13 .
  • the trolley 11 After passing through the high temperature zone I, the trolley 11 runs to the middle temperature zone. After the cooling of the high temperature zone I, the temperature of the material is lowered. Therefore, the temperature of the flue gas discharged from the middle temperature zone is between 200 °C and 350 °C. After passing through the medium temperature zone II, the trolley 11 runs to the low temperature zone III, at which time the material temperature is further lowered, and the temperature of the low temperature zone III exhaust gas is generally lower than 200 °C. After the low temperature zone III, the material temperature drops below 150 °C, and is sent to the next process in the non-cooling zone to complete the material cooling.
  • the object of the present invention is to provide a method for reusing a ring-cooling machine flue gas, which can effectively increase the temperature of the flue gas discharged from the ring cooler and improve the efficiency of flue gas reuse.
  • Another object of the present invention is to provide a ring chiller flue gas reuse system which is used in a ring chiller to effectively increase the temperature of the flue gas discharged from the ring chiller and improve the efficiency of flue gas reuse.
  • the invention discloses a method for recycling flue gas of a ring cooler, the method comprising: collecting medium temperature flue gas discharged from a middle temperature zone of a ring cooler as a cooling wind in a high temperature zone of a ring cooler; collecting high temperature flue gas discharged from a high temperature zone for reuse .
  • the temperature of the medium temperature flue gas ranges from 200 ° C to 350 ° C.
  • the invention also discloses a ring-cooling machine flue gas reuse system comprising: a ring cold cover disposed above the exhaust pipe of the middle temperature zone of the ring cooler for collecting flue gas, respectively connecting the ring cold cover and the ring cooler high temperature A rear air duct and a front air duct of the cooling duct are disposed, and a circulation fan is disposed between the rear air duct and the front air duct.
  • the front end of the front air duct is divided into a first air inlet duct and a second air inlet duct, and the first air inlet duct and the second air inlet duct respectively communicate with the cooling air duct of the high temperature zone of the ring cooler.
  • the radial end face of the ring cold cover is a gate-shaped shape, and a top end surface thereof is provided with a smoke exhaust port connecting the rear air duct.
  • the invention further discloses a ring cooler, comprising: a ring cold cover disposed above the exhaust pipe in the middle temperature zone of the ring cooler for collecting flue gas, respectively connecting the ring cold cover and the ring cooler high temperature zone cooling wind A rear air duct and a front air duct of the road, and a circulating fan is disposed between the rear air duct and the front air duct.
  • the front end of the front air duct is divided into a first air inlet duct and a second air inlet duct, and the first air inlet duct and the second air inlet duct respectively communicate with the cooling air duct of the high temperature zone of the ring cooler.
  • the radial end face of the ring cold cover is a gate-shaped shape, and a top end surface thereof is provided with a smoke exhaust port connecting the rear air duct.
  • the present invention has the following advantages:
  • the invention collects the medium temperature flue gas discharged from the middle temperature zone of the ring cooler, and uses the part of the medium temperature flue gas as the cooling wind of the high temperature zone of the ring cooler, and the high temperature flue gas discharged after the heat exchange of the medium temperature flue gas and the high temperature material having a certain temperature itself
  • the temperature is discharged directly after using the normal temperature cold air to cool the material in the high temperature zone of the original ring cooler.
  • the temperature of the hot flue gas is much higher, and the high-temperature flue gas is collected for power generation, boiling water, etc., to effectively improve the efficiency of flue gas reuse.
  • Figure 1 is a radial cross-sectional view of a conventional ring cooler
  • FIG. 2 is a schematic overall view of a conventional ring cooler
  • Figure 3 is a schematic overall view of the ring cooler of the present invention.
  • the invention collects the medium temperature flue gas discharged from the middle temperature zone of the ring cooler, and uses the part of the medium temperature flue gas as the cooling wind of the high temperature zone I of the ring cooler, and the medium temperature flue gas with a certain temperature and the hot material of the high temperature zone I are fully heat exchanged. After that, it becomes a high-temperature flue gas with a very high temperature, and then collects part of the high-temperature flue gas for power generation, boiling water, etc., thereby effectively improving the efficiency of flue gas reuse.
  • FIG. 3 it is a schematic diagram of the overall ring-cooling machine 30 of the present invention.
  • a ring-cooling cover (not shown) for collecting flue gas is disposed above the middle-zone exhaust duct (not shown) of the ring-cooling machine 30,
  • the radial end of the ring cold cover (pointing to the center of the ring cooler 30) has a gate shape, the circumferential length is equivalent to the length of the intermediate temperature zone II of the ring cooler 30, and the ring cold cover is in the middle temperature zone II of the ring cooler 30. It is located above the trolley (not shown).
  • the use of a ring cold cover to collect flue gas can prevent the temperature of the flue gas from decreasing after contact with air.
  • the middle of the ring cold cover ring is provided with a smoke exhaust port (not shown) at an intermediate position, and the smoke exhaust port is connected to the rear air duct 31.
  • the rear air duct 31 is a ventilated pipe having a large diameter, which is installed above the ring cooler 30 and extends from the intermediate temperature zone II of the ring cooler to the high temperature zone I of the ring cooler.
  • the rear end of the rear air duct 31 communicates with the exhaust port of the ring cold cover, and the front end communicates with the air inlet (not shown) of the circulation fan 33.
  • the circulation fan 33 is disposed between the rear air duct 31 and the front air duct 32, and the air outlet of the circulation fan 33 communicates with the rear end of the front air duct 32.
  • the front end of the front air duct 32 needs to communicate with the cooling air duct 35 of the high temperature area I.
  • the front end diameter of the front air duct 32 is relatively high.
  • the temperature of the cooling air duct 35 is large. If the diameter of the front air duct 32 is reduced, direct cooling and cooling are performed.
  • the front end of the front air duct 32 is divided into a first air inlet duct 321 and a second air inlet duct 322, and the first air inlet duct 321 and the second air inlet duct 322 are respectively in communication with the cooling air duct 35.
  • the sum of the diameters of the first air inlet duct 321 and the second air inlet duct 322 is equivalent to the diameter of the rear end of the front air duct 32, and effectively prevents the wind speed change due to the tube diameter change, so that the cooling air smoothly enters the cooling air from the front air duct 32.
  • Tube 35 up to the annular duct in the annular tank (not shown).
  • the medium temperature flue gas discharged from the middle temperature zone II of the ring cooler is sucked into the rear air duct 31 by the circulation fan 33, and is pressurized by the circulation fan 33 to be sent to the rear end of the front air duct 32, and the first air inlet pipe 321 passing through the front end of the front air duct 32.
  • the second air inlet pipe 322 enters the high temperature zone I cooling air pipe 35, passes through the cooling air pipe 35 and then enters the trolley of the high temperature zone I through the annular air duct (not shown), and the high temperature material on the trolley is sufficient
  • the heat exchange becomes a high-temperature high-temperature flue gas, and is then collected in a ring-cooling hood (not shown) disposed in the high temperature zone I for use in power generation, water boiling, and the like.
  • a layer of heat insulating material may be wrapped outside the rear air duct 31 and the front air duct 32.
  • the temperature range of the medium temperature flue gas discharged from the temperature zone II of the ring cooler 30 is 200 ° C - 350 ° C.
  • the present invention utilizes a ring cold cover set in the middle temperature zone II of the ring cooler 30 to collect this portion of 200 ° C -
  • the medium temperature flue gas at 350 °C is sent to the ring cold air passage 35 of the high temperature zone I through the rear air duct 31 and the front air duct 32, and then sent to the trolley through the annular air duct, and the temperature on the trolley is as high as 700. C - 800.
  • the material of C is exchanged for heat.
  • the conveying pipeline adopts effective heat preservation measures, and the flue gas temperature can be maintained at about 200 °C _ 350 °. C range.
  • the temperature of the discharged high temperature flue gas is directly discharged from the high temperature zone I of the original ring cooler 30 by using the normal temperature cold air to cool the material.
  • the temperature of the gas is much higher.
  • the flue gas waste heat is reused, when the flue gas reaches a certain temperature (for example, 350 ° C), the flue gas temperature is increased, and the flue gas heat energy recovery amount is increased.
  • the medium temperature flue gas discharged from the middle temperature zone II of the ring cooler 30 is used as the cooling air of the high temperature zone I, which can significantly increase the temperature of the high temperature flue gas discharged from the high temperature zone I, and effectively improve the efficiency of flue gas reuse.
  • the present invention can also collect the low-temperature flue gas discharged from the low-temperature zone III of the ring cooler 30, and use the part of the low-temperature flue gas as the cooling wind of the high-temperature zone I of the ring-cooling machine 30, and collect the high-temperature flue gas discharged from the high-temperature zone I. Reuse.
  • the present invention can simultaneously collect the flue gas discharged from the middle temperature zone II and the low temperature zone III of the ring cooler 30, and use the part of the flue gas as the cooling wind of the high temperature zone I of the ring cooler 30, and collect the high temperature discharged by the high temperature zone I. Smoke, reuse.
  • the invention can be applied not only to a ring cooler in the field of iron and steel smelting, but also to a heat energy recycling system in other fields, for example, cement production, power generation and the like.
  • a ring cooler in the field of iron and steel smelting
  • a heat energy recycling system in other fields, for example, cement production, power generation and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

L’invention concerne un procédé pour réutiliser les fumées d’un refroidisseur circulaire, comprenant les étapes suivantes : récupérer les fumées à température moyenne déchargées à partir d’une région à température moyenne II d’un refroidisseur circulaire (30) comme vent de refroidissement dans une région à haute température I du refroidisseur circulaire (30), et récupérer ensuite les fumées à haute température déchargées à partir d’une région à haute température I dans le but de les réutiliser. L’invention concerne également un système pour réutiliser les fumées d’un refroidisseur circulaire, comprenant une hotte de refroidisseur circulaire, qui est agencée au-dessus du tuyau d’échappement de fumées dans la région à température moyenne II du refroidisseur circulaire (30) et qui est utilisée pour récupérer les fumées, un tuyau de vent avant (32) et un tuyau de vent arrière (31) qui sont respectivement mis en communication avec la hotte du refroidisseur circulaire et le tuyau de vent de refroidissement (35) dans la région à haute température I du refroidisseur circulaire (30), et un ventilateur de circulation (33) qui est monté entre le tuyau de vent avant (32) et le tuyau de vent arrière (31). L’invention concerne en outre un refroidisseur circulaire qui récupère les fumées à température moyenne qui sont déchargées à partir d'une région à haute température II du refroidisseur circulaire (30), et la partie des fumées à température moyenne est utilisée comme vent de refroidissement dans une région à haute température I du refroidisseur circulaire (30). Une fois que les fumées à température moyenne ont elles-mêmes subi un échange de chaleur à une certaine température avec des matériaux à haute température, elles déchargent des fumées à haute température à une température très élevée, et ensuite la partie des fumées à haute température est récupérée et réutilisée pour générer de l’électricité, faire bouillir de l’eau, et analogues, améliorant ainsi efficacement la réutilisation des fumées.
PCT/CN2009/075050 2008-11-21 2009-11-20 Procédé et système pour réutiliser les fumées d’un refroidisseur circulaire, et refroidisseur circulaire Ceased WO2010057439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810177098.2 2008-11-21
CN2008101770982A CN101403571B (zh) 2008-11-21 2008-11-21 一种环冷机烟气再利用方法和系统、及环冷机

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101881562A (zh) * 2010-06-24 2010-11-10 浙江西子联合工程有限公司 烧结环冷机余热利用烟气循环计算机实时控制系统及其控制方法
CN102967156A (zh) * 2012-12-13 2013-03-13 中冶焦耐工程技术有限公司 一种插入式预热装置
CN108913870A (zh) * 2018-09-21 2018-11-30 山东宏旺实业有限公司 一种退火炉风冷段冷却方法及系统
CN112212703A (zh) * 2020-10-13 2021-01-12 中冶北方（大连）工程技术有限公司 环冷机热风梯级利用装置
CN113175822A (zh) * 2021-04-30 2021-07-27 胡锡文 水泥熟料气力分级旋转冷却机
CN113639565A (zh) * 2021-09-03 2021-11-12 中冶北方（大连）工程技术有限公司 一种球团环冷机风系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101403571B (zh) * 2008-11-21 2011-11-30 中冶长天国际工程有限责任公司 一种环冷机烟气再利用方法和系统、及环冷机
CN101929798B (zh) * 2009-06-26 2012-08-22 中国恩菲工程技术有限公司 用于氧化铝生产的烧结设备
CN101598501B (zh) * 2009-07-09 2011-01-12 中冶长天国际工程有限责任公司 一种环形风道
CN101865609B (zh) * 2010-06-18 2014-05-07 昆明理工大学 一种回收冷却废气热能的新工艺
CN111412752A (zh) * 2020-03-26 2020-07-14 中冶华天工程技术有限公司 一种环冷机冷却风循环系统

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JP2001330373A (ja) * 2000-05-19 2001-11-30 Kawasaki Steel Corp 焼結鉱の冷却装置
CN101118125A (zh) * 2007-09-14 2008-02-06 昆明阳光基业股份有限公司 一种冶炼烧结环冷余热回收发电设备和方法
CN101221019A (zh) * 2008-01-22 2008-07-16 袁长胜 烧结环冷机余热利用装置
CN101236052A (zh) * 2007-01-30 2008-08-06 秦皇岛新河智能科技有限公司 一种熟料生产用全密封循环冷却机
CN101403571A (zh) * 2008-11-21 2009-04-08 中冶长天国际工程有限责任公司 一种环冷机烟气再利用方法和系统、及环冷机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001330373A (ja) * 2000-05-19 2001-11-30 Kawasaki Steel Corp 焼結鉱の冷却装置
CN101236052A (zh) * 2007-01-30 2008-08-06 秦皇岛新河智能科技有限公司 一种熟料生产用全密封循环冷却机
CN101118125A (zh) * 2007-09-14 2008-02-06 昆明阳光基业股份有限公司 一种冶炼烧结环冷余热回收发电设备和方法
CN101221019A (zh) * 2008-01-22 2008-07-16 袁长胜 烧结环冷机余热利用装置
CN101403571A (zh) * 2008-11-21 2009-04-08 中冶长天国际工程有限责任公司 一种环冷机烟气再利用方法和系统、及环冷机

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101881562A (zh) * 2010-06-24 2010-11-10 浙江西子联合工程有限公司 烧结环冷机余热利用烟气循环计算机实时控制系统及其控制方法
CN101881562B (zh) * 2010-06-24 2012-06-13 浙江西子联合工程有限公司 烧结环冷机余热利用烟气循环计算机实时控制系统及其控制方法
CN102967156A (zh) * 2012-12-13 2013-03-13 中冶焦耐工程技术有限公司 一种插入式预热装置
CN108913870A (zh) * 2018-09-21 2018-11-30 山东宏旺实业有限公司 一种退火炉风冷段冷却方法及系统
CN112212703A (zh) * 2020-10-13 2021-01-12 中冶北方（大连）工程技术有限公司 环冷机热风梯级利用装置
CN113175822A (zh) * 2021-04-30 2021-07-27 胡锡文 水泥熟料气力分级旋转冷却机
CN113175822B (zh) * 2021-04-30 2023-10-20 胡锡文 水泥熟料气力分级旋转冷却机
CN113639565A (zh) * 2021-09-03 2021-11-12 中冶北方（大连）工程技术有限公司 一种球团环冷机风系统

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CN101403571A (zh) 2009-04-08
CN101403571B (zh) 2011-11-30

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