CN201582821U - Indirect radiant tube heating device - Google Patents

Indirect radiant tube heating device Download PDF

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Publication number
CN201582821U
CN201582821U CN2009202896460U CN200920289646U CN201582821U CN 201582821 U CN201582821 U CN 201582821U CN 2009202896460 U CN2009202896460 U CN 2009202896460U CN 200920289646 U CN200920289646 U CN 200920289646U CN 201582821 U CN201582821 U CN 201582821U
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CN
China
Prior art keywords
radiant tube
air outlet
hot air
burner
flue gas
Prior art date
Application number
CN2009202896460U
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Chinese (zh)
Inventor
田发禹
郑剑辉
李楠
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中冶南方(武汉)威仕工业炉有限公司
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Application filed by 中冶南方(武汉)威仕工业炉有限公司 filed Critical 中冶南方(武汉)威仕工业炉有限公司
Priority to CN2009202896460U priority Critical patent/CN201582821U/en
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Publication of CN201582821U publication Critical patent/CN201582821U/en

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Abstract

The utility model relates to an indirect radiant tube heating device. The device comprises a burner, a radiant tube, a heat exchanger, a vertical pipeline and an air tube, wherein the burner is located inside a burning end of the radiant tube and communicated with a gas tube, and a hot gas inlet is arranged at a burning end part of the radiant tube; a smoke exhaust port and a hot air outlet connector are arranged at a smoke exhaust end part of the radiant tube, and a hot air outlet is arranged on the hot air outlet connector; one end of the vertical pipeline is connected with the hot air outlet connector, and the other end thereof is communicated with the hot gas inlet; and one end part of the air tube is positioned inside a smoke exhaust end of the radiant tube and communicated with the inlet of the heat exchanger, the other end of the air tube adopts a cold combustion air inlet, and the outlet of the heat exchanger is communicated with the hot air outlet. The device is characterized in that a circulating flue gas passage is arranged on the hot air outlet connector, and the two ends of the circulating flue gas passage are communicated with the radiant tube and the vertical pipeline respectively. The device has the advantage of energy conservation.

Description

The radiant tube indirect heating apparatus

Technical field

The utility model relates to a kind of radiant tube indirect heating apparatus.

Background technology

Along with the continuous progress of society and the continuous development of science and technology, the energy shortage problem becomes the significant problem of the serious puzzlement national economic development, this forces industrial department to continually develop and utilize new forms of energy on the one hand, on the other hand, people take conservation measures, both constantly employed new technology on the production technology, new technology updates old production technology and working condition, constantly using in realizing energy-conservation process again simultaneously improves equipment be able to energy-conservation.The environmental protection aspect causes environmental pollution serious because industrial production produces a large amount of waste gas.In utilizing the energy-saving equipment process, also must take measures to reduce the discharging of pollutants such as NOX and reduce the pollution of environment.

Band steel heat form in the continuous annealing furnace: in order to obtain the good annealing product of surface quality, annealing furnace all adopts the mode of radiant tube indirect usually.Wherein, the heating of W type and U type radiant tube is two kinds of indirect forms commonly used, W type, U type radiant tube because of to similar name of English alphabet " W " " U ", its version is as shown in Figure 1 and Figure 2.

W type, U type radiant tube operation principle: as shown in Figure 1 and Figure 2, to be cold combustion air be equipped with air/flue gas heat exchange device in the smoke evacuation end of W type, U type radiant tube to its operation principle infeeds in air hose, vertical pipe from radiant tube after the heat exchanger heating is fed to burner, mix after lighting a fire with the coal gas that infeeds at the burner end and to burn, combustion product flows along Fig. 1 or direction shown in Figure 2 in radiant tube.In the process of flow of flue gas, the heat of high-temperature flue gas constantly passes to the band steel by radiant tube, reaches the purpose of heating tape steel.Flue gas is after discharge from the radiant tube exhaust opening behind air/flue gas heat exchange device heating back air.

Summary of the invention

The purpose of this utility model is to provide a kind of radiant tube indirect heating apparatus, but this device energy savings.

To achieve these goals, technical scheme that the utility model adopts is: the radiant tube indirect heating apparatus, and it comprises burner, radiant tube, heat exchanger, vertical pipe, air hose; Burner is positioned at the fire end of radiant tube, and burner links to each other with radiant tube fire end flange by the burner flange, and burner is connected with gas pipe, and the burning end of radiant tube is provided with the gas access of heat; The smoke evacuation end of radiant tube is provided with exhaust opening and hot air outlet joint, and the hot air outlet joint is provided with hot air outlet; One end of vertical pipe is connected with the hot air outlet joint, and hot air outlet is connected with vertical pipe, and the other end of vertical pipe is connected with the gas access of heat; Heat exchanger is positioned at the smoke evacuation end of radiant tube, one end of air hose is positioned at the smoke evacuation end of radiant tube and communicates with the inlet of heat exchanger, the other end of air hose is cold combustion air inlet, the cold combustion air porch of air hose links to each other with air delivery pipe by flange, seal between the cold combustion air porch of air hose and the smoke evacuation end of radiant tube, the outlet of heat exchanger communicates with hot air outlet; It is characterized in that: the hot air outlet joint is provided with the circulating flue gas passage, and an end of circulating flue gas passage is connected with radiant tube, and the other end of circulating flue gas passage is connected with vertical pipe.

Operation principle of the present utility model: 1, energy-conservation aspect: when the hot-air after preheating enters into vertical pipe, because the jet action of air has part of smoke and mixes and the participation burning of coming in because of air-spray.Because of this partial fume is to circulate in radiant tube for the second time, utilize the waste heat post bake band steel of this part circulating flue gas, reach the purpose of energy savings.2, environmental protection aspect: owing to be mixed with flue gas in the combustion air that participates in burning, the oxygen content of combustion air is diluted on the one hand, and oxygen content is low more, at the NO that guarantees to generate under the clean-burning situation of coal gas X(nitrogen oxide) just few more.On the other hand, because flue gas does not participate in burning, the high-temperature product of burning and secondary flue gas mix, and can reduce the temperature of the combustion product of high-temperature region, avoid high-temperature region concentrated in the radiant tube, make in the radiant tube more even along pipe range direction temperature.According to NO X(nitrogen oxide) formation mechanism, high temperature also are to produce NO XA main cause of (nitrogen oxide), owing to do not have concentrated high-temperature region in the radiant tube this moment, so NO X(nitrogen oxide) growing amount also can reduce thereupon.

The beneficial effects of the utility model are:

1, utilize the waste heat post bake band steel of circulating flue gas, can energy savings.

2, more even in the radiant tube along length of tube direction temperature, more favourable to heating tape steel temperature homogeneity.

3, the NO of Chan Shenging X(nitrogen oxide) can be still less, more environmental protection.

Description of drawings

Fig. 1 is the structural representation of existing W type radiant tube indirect heating apparatus.

Fig. 2 is the structural representation of existing U type radiant tube indirect heating apparatus.

Fig. 3 is the structural representation of the utility model embodiment 1.

Fig. 4 is the structural representation of the utility model embodiment 2.

Among the figure: 1-gas pipe, 2-burner, 3-radiant tube, 4-heat exchanger (air/flue gas heat exchange device), the 5-exhaust opening, the combustion air inlet that 6-is cold, 7-hot air outlet joint, 8-hot air outlet, the 9-vertical pipe, the gas access of 10-heat, 11-air hose, 12-circulating flue gas passage.

The specific embodiment

Embodiment 1:

As shown in Figure 3, the radiant tube indirect heating apparatus, it comprises burner 2, radiant tube 3, heat exchanger 4, vertical pipe 9, air hose 11; Described radiant tube 3 is a W type radiant tube; Burner 2 is positioned at the fire end of radiant tube 3, and burner links to each other with radiant tube fire end flange by the burner flange, and burner 2 is connected with gas pipe (gas pipe provides coal gas to burner), and the burning end of radiant tube 3 is provided with the gas access 10 of heat; The smoke evacuation end of radiant tube 3 is provided with exhaust opening 5 and hot air outlet joint 7, and hot air outlet joint 7 is provided with hot air outlet 8; One end of vertical pipe 9 is connected with hot air outlet joint 7, and hot air outlet 8 is connected with vertical pipe 9, and the other end of vertical pipe 9 is connected with the gas access 10 of heat; Heat exchanger 4 is positioned at the smoke evacuation end of radiant tube 3, one end of air hose 11 is positioned at the smoke evacuation end of radiant tube 3 and communicates with the inlet of heat exchanger 4, the other end of air hose 11 is cold combustion air inlet 6, (do not draw among the figure by flange and air delivery pipe in the cold combustion air of air hose 11 6 places that enter the mouth, cold combustion air is provided) link to each other, the sealing between the smoke evacuation end of 6 places and radiant tube 3 (flue gas can only be discharged from exhaust opening 5, circulating flue gas passage 12) that enters the mouth of the cold combustion air of air hose 11, the outlet of heat exchanger 4 communicates with hot air outlet 8; Hot air outlet joint 7 is provided with circulating flue gas passage 12, and an end of circulating flue gas passage 12 is connected with radiant tube 3 (promptly having partial fume to enter circulating flue gas passage 12), and the other end of circulating flue gas passage 12 is connected with vertical pipe 9.

Embodiment 2:

As shown in Figure 4, substantially the same manner as Example 1, difference is: described radiant tube 3 is U type radiant tube.

Change part of the present utility model is that going out heat exchanger at hot-air enters into the vertical pipe place, and original hot-air is communicated with the airtight part of separating of flue gas, and it is not separated, and flue gas and hot-air can be mixed herein, as shown in Figure 3, Figure 4.Herein, when hot-air when heat exchanger comes out to enter into vertical pipe, partial fume from open communication also one mix and come in, the air of having mixed flue gas then enters into the radiation pipe burner tip place and participates in burning, part of smoke is then discharged from radiant tube exhaust opening 5 in addition.Mix the partial fume that participates in burning with air and be called circulating flue gas.

Claims (1)

1. radiant tube indirect heating apparatus, it comprises burner (2), radiant tube (3), heat exchanger (4), vertical pipe (9), air hose (11); Burner (2) is positioned at the fire end of radiant tube (3), and burner links to each other with radiant tube fire end flange by the burner flange, and burner (2) is connected with gas pipe, and the burning end of radiant tube (3) is provided with the gas access (10) of heat; The smoke evacuation end of radiant tube (3) is provided with exhaust opening (5) and hot air outlet joint (7), and hot air outlet joint (7) is provided with hot air outlet (8); One end of vertical pipe (9) is connected with hot air outlet joint (7), and hot air outlet (8) is connected with vertical pipe (9), and the other end of vertical pipe (9) is connected with the gas access (10) of heat; Heat exchanger (4) is positioned at the smoke evacuation end of radiant tube (3), one end of air hose (11) is positioned at the smoke evacuation end of radiant tube (3) and communicates with the inlet of heat exchanger (4), the other end of air hose (11) is cold combustion air inlet (6), the cold combustion air inlet (6) of air hose (11) is located to link to each other with air delivery pipe by flange, the cold combustion air inlet (6) of air hose (11) locate and the smoke evacuation end of radiant tube (3) between seal, the outlet of heat exchanger (4) communicates with hot air outlet (8); It is characterized in that: hot air outlet joint (7) is provided with circulating flue gas passage (12), and an end of circulating flue gas passage (12) is connected with radiant tube (3), and the other end of circulating flue gas passage (12) is connected with vertical pipe (9).
CN2009202896460U 2009-12-29 2009-12-29 Indirect radiant tube heating device CN201582821U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202896460U CN201582821U (en) 2009-12-29 2009-12-29 Indirect radiant tube heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202896460U CN201582821U (en) 2009-12-29 2009-12-29 Indirect radiant tube heating device

Publications (1)

Publication Number Publication Date
CN201582821U true CN201582821U (en) 2010-09-15

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Application Number Title Priority Date Filing Date
CN2009202896460U CN201582821U (en) 2009-12-29 2009-12-29 Indirect radiant tube heating device

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936540A (en) * 2010-10-08 2011-01-05 中冶南方(武汉)威仕工业炉有限公司 Heat exchanger matched with radiant-tube burner for use
CN101943405A (en) * 2010-09-17 2011-01-12 北京京杰锐思技术开发有限公司 Energy-saving radiant tube component
CN102345868A (en) * 2011-10-17 2012-02-08 佛山市科皓燃烧设备制造有限公司 Radiant tube heat exchanger with smoke backflow
CN102759107A (en) * 2012-07-31 2012-10-31 中冶南方(武汉)威仕工业炉有限公司 Air and coal gas double-preheating secondary injection type radiant tube nozzle heat exchanger and heat exchanging method
CN102759109A (en) * 2012-07-31 2012-10-31 中冶南方(武汉)威仕工业炉有限公司 Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method
CN103255271A (en) * 2013-05-21 2013-08-21 北京科技大学 Gas dual-cycle radiant tube heating device
CN104633661A (en) * 2014-12-12 2015-05-20 武汉钢铁(集团)公司 Low NOx double-end type radiant pipe burner
CN105020703A (en) * 2015-07-13 2015-11-04 佛山市科皓燃烧设备制造有限公司 Novel combustion device
CN105408716A (en) * 2013-08-02 2016-03-16 萨克米伊莫拉机械合作社合作公司 A radiating heating module for continuous-cycle firing kilns of ceramic products
CN105465784A (en) * 2016-01-26 2016-04-06 佛山市科皓燃烧设备制造有限公司 Regenerative radiant tube burner with flue gas recirculation
CN106955898A (en) * 2017-04-27 2017-07-18 山东钢铁集团日照有限公司 A kind of control method of cold rolling heater and ultralow discharged nitrous oxides
CN107965763A (en) * 2017-11-20 2018-04-27 马中亮 A kind of upper shelf type W type radiant tubes
CN109790980A (en) * 2016-09-29 2019-05-21 杰富意钢铁株式会社 The manufacturing method of heat exchanger, radiant tube type heating device and heat exchanger
WO2020161559A1 (en) * 2019-02-05 2020-08-13 Esa S.P.A. Radiant tube recuperative burner assembly

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943405B (en) * 2010-09-17 2015-04-08 北京京杰锐思技术开发有限公司 Energy-saving radiant tube component
CN101943405A (en) * 2010-09-17 2011-01-12 北京京杰锐思技术开发有限公司 Energy-saving radiant tube component
CN101936540A (en) * 2010-10-08 2011-01-05 中冶南方(武汉)威仕工业炉有限公司 Heat exchanger matched with radiant-tube burner for use
CN102345868A (en) * 2011-10-17 2012-02-08 佛山市科皓燃烧设备制造有限公司 Radiant tube heat exchanger with smoke backflow
CN102759107A (en) * 2012-07-31 2012-10-31 中冶南方(武汉)威仕工业炉有限公司 Air and coal gas double-preheating secondary injection type radiant tube nozzle heat exchanger and heat exchanging method
CN102759109A (en) * 2012-07-31 2012-10-31 中冶南方(武汉)威仕工业炉有限公司 Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method
CN103255271A (en) * 2013-05-21 2013-08-21 北京科技大学 Gas dual-cycle radiant tube heating device
CN105408716A (en) * 2013-08-02 2016-03-16 萨克米伊莫拉机械合作社合作公司 A radiating heating module for continuous-cycle firing kilns of ceramic products
CN104633661B (en) * 2014-12-12 2017-10-27 武汉钢铁(集团)公司 Low NOxDouble ended type radiant tube burner
CN104633661A (en) * 2014-12-12 2015-05-20 武汉钢铁(集团)公司 Low NOx double-end type radiant pipe burner
CN105020703A (en) * 2015-07-13 2015-11-04 佛山市科皓燃烧设备制造有限公司 Novel combustion device
CN105465784A (en) * 2016-01-26 2016-04-06 佛山市科皓燃烧设备制造有限公司 Regenerative radiant tube burner with flue gas recirculation
CN109790980A (en) * 2016-09-29 2019-05-21 杰富意钢铁株式会社 The manufacturing method of heat exchanger, radiant tube type heating device and heat exchanger
CN106955898A (en) * 2017-04-27 2017-07-18 山东钢铁集团日照有限公司 A kind of control method of cold rolling heater and ultralow discharged nitrous oxides
CN106955898B (en) * 2017-04-27 2018-10-26 山东钢铁集团日照有限公司 A kind of control method of cold rolling heating device and ultralow discharged nitrous oxides
CN107965763A (en) * 2017-11-20 2018-04-27 马中亮 A kind of upper shelf type W type radiant tubes
WO2020161559A1 (en) * 2019-02-05 2020-08-13 Esa S.P.A. Radiant tube recuperative burner assembly

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100915

Termination date: 20141229

EXPY Termination of patent right or utility model