CN101403571B - Circular cooler flue gas recycling method and system, and circular cooler - Google Patents

Circular cooler flue gas recycling method and system, and circular cooler Download PDF

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Publication number
CN101403571B
CN101403571B CN2008101770982A CN200810177098A CN101403571B CN 101403571 B CN101403571 B CN 101403571B CN 2008101770982 A CN2008101770982 A CN 2008101770982A CN 200810177098 A CN200810177098 A CN 200810177098A CN 101403571 B CN101403571 B CN 101403571B
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flue gas
central cooler
temperature
airduct
ring
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CN2008101770982A
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CN101403571A (en
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高德亮
戴传德
刘相佩
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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Priority to CN2008101770982A priority Critical patent/CN101403571B/en
Publication of CN101403571A publication Critical patent/CN101403571A/en
Priority to PCT/CN2009/075050 priority patent/WO2010057439A1/en
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    • 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
    • F27D17/004—Systems for reclaiming waste heat
    • 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

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  • 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

The present invention discloses a reuse system of the ring-cooling machine flue gas which comprises a ring-cooling cover which is arranged in the intermediate temperature region and used for collecting the flue gas, a front wind pipe and a back wind pipe which are respectively communicated with the ring-cooling cover and the cooling wind tunnel in the high temperature region of the ring-cooling machine, and a circulating fan which is mounted between the front wind pipe and the back wind pipe. The present invention collects the medium temperature flue gas discharged by the medium temperature region of the ring-cooling machine, and part of the medium temperature flue gas is used as the cooling wind in the high temperature region of the ring-cooling machine. After the heat exchange with high-temperature materials, the medium temperature flue gas with a self certain temperature discharges high temperature flue gas with very high temperature, and then a part of high temperature flue gas is collected and reused for generating electricity, boiling water, and the like, thus effectively improving the efficiency of the flue gas reuse.

Description

A kind of central cooler flue gas utilizes method and system again, reaches central cooler
Technical field
The present invention relates to field of iron and steel smelting, particularly a kind of central cooler flue gas utilizes method and system again, reaches central cooler.
Background technology
In smelting iron and steel, central cooler is used to cool off the material of sintering.Central cooler integral body is annular, and the material of sintering moves a week by chassis in central cooler, finishes cooling and discharging.Referring to Fig. 1, be central cooler 10 (point to central cooler center) cutaway view radially, the material of finishing sintering is laid on the grate plate 12 of chassis 11, and chassis 11 is around central cooler 10 center uniform rotation.Simultaneously, the cold wind that the air blast (not shown) is blown into passes grate plate 12 from bottom to top and enters chassis, carry out sufficient heat exchange with material on the grate plate 12 after, discharge from smokejack 13 as hot flue gas.
Referring to Fig. 2, overall schematic for central cooler 10, central cooler 10 is divided into I district, high-temperature region, middle warm area II district, low-temperature space III district and IV district, non-cooling zone, the material that the sintering machine (not shown) is finished sintering is transported on the chassis 11 of central cooler 10 in the high-temperature region, at this moment, temperature of charge is between 700 ℃-800 ℃, and the cooling air of normal temperature is after this high-temperature region and material sufficient heat exchange, become the high-temperature flue gas that temperature reaches 350 ℃-400 ℃, discharge from smokejack 13.
Chassis 11 moves to middle warm area behind the high-temperature region, through the cooling of high-temperature region, temperature of charge decreases, and therefore, the flue-gas temperature that middle warm area is discharged is between 200 ℃-350 ℃.Behind the warm area, chassis 11 moves to low-temperature space in the process, and this moment, temperature of charge was further lower, and the temperature of low-temperature space discharging flue gas generally is lower than 200 ℃.Behind low-temperature space, temperature of charge is reduced to below 150 ℃, is admitted to subsequent processing in non-cooling zone, finishes the material cooling.
In the material cooling procedure, have a large amount of hot flue gases and directly enter atmosphere, not only cause atmosphere pollution, also cause the waste of the energy.Be environmental protection and energy saving, part iron enterprise reclaims the hot flue gas of high-temperature region, utilizes the heat energy of high-temperature flue gas to generate electricity, heats up water.As everyone knows, the utilization rate of high-temperature flue gas heat energy and the temperature of flue gas have substantial connection, and flue-gas temperature is high more, and the efficient of heat utilization is just high more, therefore, how to improve the temperature of central cooler 10 discharging flue gases, and be significant to utilizing again of flue gas.
Summary of the invention
The purpose of this invention is to provide a kind of central cooler flue gas and utilize system again, this system is used for central cooler, can effectively improve the temperature of central cooler discharging flue gas, improves the efficient that flue gas utilizes again.
Another purpose of the present invention provides a kind of central cooler flue gas and utilizes method again, and this method can effectively improve the temperature of central cooler discharging flue gas, improves the efficient that flue gas utilizes again.
Another object of the present invention provides a kind of central cooler, and the temperature of this central cooler discharging flue gas is higher, can improve the efficient that flue gas utilizes again.
The present invention also discloses a kind of central cooler flue gas and utilizes system again, comprise: be arranged on the cold cover of ring that is used to collect flue gas in the central cooler on the warm area, be communicated with the forward and backward airduct of cold cover of described ring and central cooler high-temperature region cooling air channel respectively, between the described forward and backward airduct circulating fan be set.
Preferably, the other silencer that is provided with of described circulating fan.
Preferably, the front end of described preceding airduct is divided into first blast pipe and second blast pipe, and described first blast pipe and second blast pipe are communicated with described central cooler high-temperature region cooling air channel respectively.
Preferably, the radial end face of the cold cover of described ring is a door type, and its top end face is provided with the exhaust opening that connects described back airduct.
The present invention discloses a kind of central cooler flue gas based on said system and utilizes method again, and this method comprises: collect the middle temperature flue gas that warm area is discharged in the central cooler, as the cooling air of central cooler high-temperature region; Collecting the high-temperature flue gas of discharging the high-temperature region utilizes again.
Preferably, the temperature range of warm flue gas is 200 ℃-350 ℃ in described.
The present invention discloses a kind of central cooler again, comprising: be arranged on the cold cover of ring that is used to collect flue gas in the central cooler on the warm area, be communicated with the forward and backward airduct in cold cover of described ring and cooling air air channel, central cooler high-temperature region respectively, between the described forward and backward airduct circulating fan is set.
Preferably, the other silencer that is provided with of described circulating fan.
Preferably, the front end of described preceding airduct is divided into first blast pipe and second blast pipe, and described first blast pipe and second blast pipe are communicated with described central cooler high-temperature region cooling air channel respectively.
Preferably, the radial end face of the cold cover of described ring is a door type, and its top end face is provided with the exhaust opening that connects described back airduct.
Compared with prior art, the present invention has the following advantages:
The present invention collects the middle temperature flue gas of warm area discharging in the central cooler, with warm flue gas in this part as the cooling air of central cooler high-temperature region, the temperature that itself has the high-temperature flue gas of discharging after the middle temperature flue gas of uniform temperature and the high-temperature material heat exchange, directly utilize the temperature of discharging hot flue gas behind the cold wind cooling material will exceed much with respect to former central cooler high-temperature region, regather utilizations again such as this part high-temperature flue gas generates electricity, heats up water, effectively improve
Description of drawings
Fig. 1 is existing central cooler radial cross-section;
Fig. 2 is the overall schematic of existing central cooler;
Fig. 3 is the overall schematic of central cooler of the present invention.
The specific embodiment
The present invention collects the middle temperature flue gas of warm area discharging in the central cooler, with warm flue gas in this part as the cooling air of central cooler high-temperature region, after itself having the scorching hot material sufficient heat exchange in the middle temperature flue gas of uniform temperature and high-temperature region, become and have the very high-temperature flue gas of high-temperature, regather utilizations again such as this part high-temperature flue gas generates electricity, heats up water, effectively improve the efficient that flue gas utilizes again.
Referring to Fig. 3, be central cooler 30 overall schematic of the present invention, warm area is provided with the cold cover (not shown) of ring that is used to collect flue gas in the central cooler 30, radially (the sensing central cooler 30 centers) end face that encircles cold cover is a door type, the length of warm area is suitable in hoop (central cooler 30 centers relatively) length and the central cooler 30, encircle the middle temperature area that cold cover covers on central cooler 30, be higher than chassis (not shown) position, encircle cold cover top end face and be provided with the exhaust opening that connects back airduct 31.Utilize the cold cover of ring to collect flue gas, can avoid flue gas to contact the back temperature with air and reduce, guarantee flue-gas temperature.
Back airduct 31 is the bigger ventilation duct of diameter, be erected at the sky of central cooler 30, therefrom warm area extends to the high-temperature region always, is communicated with to be arranged near the preceding airduct 32 in high-temperature region, preceding airduct 32 is a ventilation duct, and preceding airduct 32 is communicated with the cooling air channel 35 of central coolers 30 high-temperature regions.Preceding airduct 32 diameters are bigger, be difficult for directly welding with cooling air channel 35, the front end of preceding airduct 32 is divided into first blast pipe 321 and 322 two branch branch wind pipes of second blast pipe, and first blast pipe 321 and second blast pipe 322 are welded on respectively on the cooling air channel 35 again, are communicated with cooling air channel 35.
For preventing that flue gas temperature in back airduct 31 and preceding airduct 32 transmission courses scatters and disappears morely, one deck heat-preservation cotton can be wrapped up in the periphery of back airduct 31 and preceding airduct 32, is used for reducing flue gas transmission course heat lost in pipe.
Be provided with the circulating fan 33 that is used for exhausting and air-supply between back airduct 31 and the preceding airduct 32, circulating fan 33 sucks the middle temperature flue gas that warm area discharges in the central cooler 30 by back airduct 31, sends into cooling air channel 35 by preceding airduct 32 again.Cooling air channel 35 is sent into chassis by the middle temperature flue gas that the annular passage (not shown) will be collected again, with high-temperature material sufficient heat exchange on the chassis, become the very high high-temperature flue gas of temperature, the cold cover (not shown) of ring that is set at the high-temperature region is collected, and be used for generating electricity, heat up water etc. utilized engineering again.
Noise is excessive when avoiding circulating fan 33 work, muffler 34 is set in that circulating fan 33 is other, is used to alleviate the operating noise of circulating fan 33.
Generally speaking, the middle temperature flue-gas temperature scope of warm area discharging is 200 ℃-350 ℃ in the central cooler 30, the cold cover of ring of utilization of the present invention warm area setting in central cooler 30 is collected this part middle temperature flue gas that is higher than 200 ℃-350 ℃, send into the ring cold air duct 35 of high-temperature region by back airduct 31 and preceding airduct 32, send into chassis by annular passage again, carry out heat exchange with the material of temperature on the chassis up to 700 ℃-800 ℃ after.Though warm flue gas is through the heat loss of transport process in this part, but fed distance is short and the insulation flue-gas temperature of process carrier pipe still can be maintained at about 200 ℃ of-350 ℃ of scopes, like this, the temperature that itself has the high-temperature flue gas of discharging after the middle temperature flue gas of uniform temperature and the high-temperature material heat exchange directly utilizes the temperature of discharging hot flue gas behind the cold wind cooling material will exceed much with respect to former central cooler 30 high-temperature regions.When flue gas utilizes again, when flue gas reaches uniform temperature (as 350 ℃), the every raising of flue-gas temperature some, the extracted amount of flue gas heat energy will increase many.Therefore, after the circulation, the high-temperature flue gas of collecting in central cooler 30 high-temperature regions can effectively improve the efficient that flue gas utilizes again.
Certainly, the present invention also can collect the low-temperature flue gas that central cooler 30 low-temperature spaces are discharged, and with the cooling air of this part low-temperature flue gas as central cooler 30 high-temperature regions, regathers the high-temperature flue gas of high-temperature region discharging, utilizes again.
In like manner, the present invention also can collect the flue gas that warm area and low-temperature space are discharged in the central cooler 30 simultaneously, with the cooling air of this partial fume as central cooler 30 high-temperature regions, regathers the high-temperature flue gas of high-temperature region discharging, utilizes again.
The present invention not only may be used in the central cooler of field of iron and steel smelting, and the heat energy that also may be used on other field utilizes in the system again, for example, and manufacture of cement, fields such as generating.The above only is a preferred implementation of the present invention, does not constitute the qualification to protection domain of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.

Claims (10)

1. a central cooler flue gas utilizes system again, it is characterized in that, comprise: be arranged on the cold cover of ring that is used to collect flue gas in the central cooler on the warm area, be communicated with the back airduct and the preceding airduct of cold cover of described ring and central cooler high-temperature region cooling air channel respectively, between described back airduct and the preceding airduct circulating fan is set.
2. the system as claimed in claim 1 is characterized in that, the other silencer that is provided with of described circulating fan.
3. the system as claimed in claim 1 is characterized in that, the front end of described preceding airduct is divided into first blast pipe and second blast pipe, and described first blast pipe and second blast pipe are communicated with described central cooler high-temperature region cooling air channel respectively.
4. the system as claimed in claim 1 is characterized in that, the radial end face of the cold cover of described ring is a door type, and its top end face is provided with the exhaust opening that connects described back airduct.
5. the central cooler flue gas based on each described system of claim 1-4 utilizes method again, it is characterized in that this method comprises:
Collect the middle temperature flue gas that warm area is discharged in the central cooler, as the cooling air of central cooler high-temperature region;
Collecting the high-temperature flue gas of discharging the high-temperature region utilizes again.
6. method as claimed in claim 5 is characterized in that, described in the temperature range of warm flue gas be 200 ℃-350 ℃.
7. central cooler, it is characterized in that, comprise: be arranged on the cold cover of ring that is used to collect flue gas in the central cooler on the warm area, be communicated with the back airduct and the preceding airduct of cold cover of described ring and central cooler high-temperature region cooling air channel respectively, between described back airduct and the preceding airduct circulating fan is set.
8. central cooler as claimed in claim 7 is characterized in that, the other silencer that is provided with of described circulating fan.
9. central cooler as claimed in claim 7 is characterized in that, the front end of described preceding airduct is divided into first blast pipe and second blast pipe, and described first blast pipe and second blast pipe are communicated with described central cooler high-temperature region cooling air channel respectively.
10. central cooler as claimed in claim 7 is characterized in that, the radial end face of the cold cover of described ring is a door type, and its top end face is provided with the exhaust opening that connects described back airduct.
CN2008101770982A 2008-11-21 2008-11-21 Circular cooler flue gas recycling method and system, and circular cooler Active CN101403571B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2008101770982A CN101403571B (en) 2008-11-21 2008-11-21 Circular cooler flue gas recycling method and system, and circular cooler
PCT/CN2009/075050 WO2010057439A1 (en) 2008-11-21 2009-11-20 Method and system for reusing flue gas of circular cooler, and circular cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008101770982A CN101403571B (en) 2008-11-21 2008-11-21 Circular cooler flue gas recycling method and system, and circular cooler

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CN101403571A CN101403571A (en) 2009-04-08
CN101403571B true CN101403571B (en) 2011-11-30

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WO (1) WO2010057439A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101403571B (en) * 2008-11-21 2011-11-30 中冶长天国际工程有限责任公司 Circular cooler flue gas recycling method and system, and circular cooler
CN101929798B (en) * 2009-06-26 2012-08-22 中国恩菲工程技术有限公司 Sintering equipment for producing alumina
CN101598501B (en) * 2009-07-09 2011-01-12 中冶长天国际工程有限责任公司 Annular airduct
CN101865609B (en) * 2010-06-18 2014-05-07 昆明理工大学 New technique for recovering heat energy of cooling waste gas
CN101881562B (en) * 2010-06-24 2012-06-13 浙江西子联合工程有限公司 Real time control system for waste heat in sinter-circle-cooling machine by using fume circle computer and control method thereof
CN102967156B (en) * 2012-12-13 2014-05-21 中冶焦耐工程技术有限公司 Plug-in type preheating device
CN108913870A (en) * 2018-09-21 2018-11-30 山东宏旺实业有限公司 A kind of air-cooled section of cooling means of annealing furnace and system
CN111412752A (en) * 2020-03-26 2020-07-14 中冶华天工程技术有限公司 Cooling air circulating system of circular cooler
CN113175822B (en) * 2021-04-30 2023-10-20 胡锡文 Cement clinker pneumatic grading rotary cooling machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001330373A (en) * 2000-05-19 2001-11-30 Kawasaki Steel Corp Cooler for sintered ore
CN101236052A (en) * 2007-01-30 2008-08-06 秦皇岛新河智能科技有限公司 All-sealing circulating cooling machine for clinker production
CN101118125A (en) * 2007-09-14 2008-02-06 昆明阳光基业股份有限公司 Smelting sintered ring-cold heat-recovering generating plant and method thereof
CN101221019A (en) * 2008-01-22 2008-07-16 袁长胜 Residual heat utilization device of sintering circular-cooler
CN101403571B (en) * 2008-11-21 2011-11-30 中冶长天国际工程有限责任公司 Circular cooler flue gas recycling method and system, and circular cooler

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CN101403571A (en) 2009-04-08

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Application publication date: 20090408

Assignee: HUNAN ZHONGYE CHANGTIAN ENERGY CONSERVATION AND ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.

Assignor: ZhongYe Changtian International Engineering Co., Ltd.

Contract record no.: 2013430000104

Denomination of invention: Circular cooler flue gas recycling method and system, and circular cooler

Granted publication date: 20111130

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Record date: 20130712

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