CN2669131Y - Combined heat exchange system for blast furnace high air temperature - Google Patents
Combined heat exchange system for blast furnace high air temperature Download PDFInfo
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- CN2669131Y CN2669131Y CNU2004200240149U CN200420024014U CN2669131Y CN 2669131 Y CN2669131 Y CN 2669131Y CN U2004200240149 U CNU2004200240149 U CN U2004200240149U CN 200420024014 U CN200420024014 U CN 200420024014U CN 2669131 Y CN2669131 Y CN 2669131Y
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- heat pipe
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- 239000003034 coal gas Substances 0.000 claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 claims abstract description 39
- 239000007789 gas Substances 0.000 claims description 78
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000000779 smoke Substances 0.000 claims description 13
- 239000003517 fume Substances 0.000 claims description 8
- 208000011580 syndromic disease Diseases 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003723 Smelting Methods 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 21
- 239000003546 flue gas Substances 0.000 description 21
- 239000000203 mixture Substances 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a blast furnace high blast temperature combined heat exchange system belonging to the technical field of steel smelting equipment, which mainly comprises a hot blast furnace, an air turbolator heat exchanger, a preposed combustion furnace, a blower, a cold gas header pipe, an air and gas double preheating heat pipe heat exchanger, a chimney and the like; the cold coal gas and the air are preheated to about 200 ℃ in the air-coal gas double-preheating heat pipe heat exchanger, the air is further preheated to 400-440 ℃ by the air turbolator heat exchanger for the second time, and then enters the hot blast stove for combustion, so that the blast temperature of the blast furnace can be increased; the utility model discloses because the heat transfer mode is reasonable, make it adopt less size can reach better technological effect, consequently can make metal consumption few, simultaneously, its manufacturing and working costs are low, but wide application in the iron and steel smelting trade.
Description
Technical field
The utility model relates to a kind of heat-exchanger rig that uses when being used to make steel or smelt iron, and belongs to the steel smelting equipment technical field.
Background technology
In the existing iron and steel production equipment, a kind of hot-blast stove heat-exchanger rig is arranged, its mainly by hot-blast stove 1 ', coal gas turbolator heat exchanger 25, the sub-heat exchanger 6 of air disturbance ', preposition combustion furnace 3 ', wind mixed chamber 24, hot air blowers 26, air blast 12 ' and cool air hose 14 ', cooled coal gas house steward 18 ', chimney 13 ' and due pipeline and valve etc. constitute, air blast 12 ' air outlet through cool air hose 14 ' after be divided into three the tunnel: the first via through valve connect preposition combustion furnace 3 ', preposition combustion furnace 3 ' directly provide combustion air can be provided; The second the tunnel through valve connect hot-blast stove 1 ', hot-blast stove 1 ' directly provide combustion air can be provided; Third Road directly connect the sub-heat exchanger 6 of air disturbance ' air intlet, the sub-heat exchanger 6 of air disturbance ' air outlet slit through valve connect hot-blast stove 1 '; Cooled coal gas is through cooled coal gas house steward 18 ' send in the system cooled coal gas house steward 18 ' be divided into three tunnel in system: the first via through valve connect hot-blast stove 1 ', in case of necessity, can directly give hot-blast stove 1 ' air feed; The second the tunnel directly connect preposition combustion furnace 3 '; Also has one tunnel gas inlet of connecting coal gas turbolator heat exchanger 25, the gas exit of coal gas turbolator heat exchanger 25 through valve connect hot-blast stove 1 ', hot-blast stove 1 ' be provided with hot-air mouth and breaching 2 ', hot-air mouth can be used for sending into high-temperature hot-air in blast furnace, breaching 2 ' be used to discharge low-temperature flue gas, breaching 1 ' a tunnel is connected the air inlet of hot air blowers 26, also have one the tunnel through valve connect chimney 13 ', in case of necessity, can be directly from chimney 13 ' discharge flue gas; The air outlet of hot air blowers 26 is connected wind mixed chamber 24, described wind mixed chamber 24 is positioned at preposition combustion furnace 3 ' top, its inside is interconnected, the air that preposition combustion furnace 3 ' interior combustion air comes and from cooled coal gas house steward's 18 ' transport cooled coal gas mixed combustion, gas fume after burning upwards enters wind mixed chamber 24, in wind mixed chamber 24 with after the hot blast of hot air blower 26 mixes mutually, discharge from the mixed flue gas outlet that is positioned at wind mixed chamber 24 tops, the mixed flue gas outlet is divided into two-way, wherein, one the tunnel enter the sub-heat exchanger 6 of air disturbance ' in carry out heat exchange, also have one the tunnel to enter in the coal gas turbolator heat exchanger 25 and carry out heat exchange, the two-way flue gas after heat exchange be combined into one the tunnel connect chimney 13 '.
When work, adopt a plurality of hot-blast stoves to provide hot blast to blast furnace, under equal prerequisite, the hot-blast stove ventilation temperature is high more, temperature in the blast furnace is high more, and is easy to the temperature that keeps higher relatively, and existing technical scheme has been carried out preheating by corresponding turbolator before making air and cooled coal gas enter hot-blast stove, temperature in the hot-blast stove correspondingly is improved, thereby the wind pushing temperature that enters blast furnace is improved.But the effect of prior art scheme is still not ideal enough, for improving the pre-heat effect of this system, whole hot-blast stove fumes must be incorporated in the wind mixed chamber, mix mutually with about 1100 ℃ combustion product of preposition combustion furnace, form 500～550 ℃ mixed flue gas, flow into the sub-heat exchanger of coal gas turbolator heat exchanger and air disturbance respectively, make air and gas preheating to 250～300 ℃, because the turbolator heat exchanger needs higher heat transfer temperature difference, its heat exchange efficiency is low, for reaching corresponding heat exchange demand, needs the volume of equipment enough big, its metal consumption is big, the equipment investment height; Because preposition combustion furnace internal combustion is cold air and cooled coal gas, make it reach higher exhaust gas temperature a large amount of coal gas that need burn, make the operating cost height of equipment.
Also has a kind of heat exchange of heat pipe in the prior art, it adopts gas, the variation of liquid two-phase is arrived the heat pipe cold junction with the thermal energy transfer in heat pipe hot junction, its heat-transfer effect is good, some groups of heat pipes can in parallelly use, for making the heat exchange of heat pipe compact conformation, had heat exchange of heat pipe has been arranged in parallel way into one, as giving the sky of air and gas preheating simultaneously, the gas double pre-heating heat exchange of heat pipe, comprise gas inlet, gas exit, gas approach, exhanst gas outlet, air intlet, air outlet slit and the air of isolating mutually, coal gas and exhaust gases passes, the heat pipe hot junction is arranged in the exhaust gases passes, the cold junction of heat pipe is arranged at respectively in gas passage and the air duct, flue gas enters exhaust gases passes and discharges from exhanst gas outlet from gas approach, give heat exchange of heat pipe with thermal energy transfer simultaneously, heat pipe will be from air intlet and next air and the coal gas preheating respectively of gas inlet, and air after preheating and coal gas flow out from air outlet slit and gas exit.
The utility model content
The purpose of this utility model provides a kind of combination heat-exchange system of high wind-warm syndrome, makes its equipment volume little, and metal consumption is few, and manufacturing and operating cost are low.
The purpose of this utility model is achieved in that the combination heat-exchange system of the high wind-warm syndrome of a kind of blast furnace, comprises hot-blast stove, the sub-heat exchanger of air disturbance, preposition combustion furnace, air blast, cooled coal gas house steward, sky, gas double pre-heating heat exchange of heat pipe and chimney; Described blower outlet is connected air intlet empty, the gas double pre-heating heat exchange of heat pipe by cool air hose, air outlet slit empty, the gas double pre-heating heat exchange of heat pipe is divided into two-way, one the tunnel connects preposition combustion furnace through preposition combustion furnace air flow control valve, the air intlet of the sub-heat exchanger of air disturbance is connected on another road, and the air outlet slit of the sub-heat exchanger of air disturbance is connected hot-blast stove; The cooled coal gas house steward connects the gas inlet of sky, gas double pre-heating heat exchange of heat pipe, gas exit empty, the gas double pre-heating heat exchange of heat pipe is divided into two-way, one the tunnel directly connects hot-blast stove, preposition combustion furnace is connected through preposition combustion furnace gas flow control valve in another road, and the exhanst gas outlet of preposition combustion furnace is connected one and mixed the wind and smoke road; Hot-blast stove is provided with breaching, and breaching is divided into two-way, and one the tunnel connects mixed wind and smoke road, also has one tunnel gas approach through hot-blast stove fume bypass flow control valve connection sky, gas double pre-heating heat exchange of heat pipe; The gas approach of the sub-heat exchanger of air disturbance is connected in the outlet that mixes the wind and smoke road, the exhanst gas outlet of the sub-heat exchanger of air disturbance is connected the gas approach of sky, gas double pre-heating heat exchange of heat pipe, exhanst gas outlet empty, the gas double pre-heating heat exchange of heat pipe is connected the air inlet of air-introduced machine, and the air outlet of air-introduced machine is connected chimney.
The utility model adopts existing device in the prior art, constitutes a new heat-exchange system by connected mode different from the past; When normal the use, can adopt a plurality of hot-blast stoves to give the blast furnace hot wind supply, after the cooled coal gas that comes from the cooled coal gas house steward was preheated to about 200 ℃ in empty, coal gas heat exchange of heat pipe, major part was delivered to hot-blast stove, also has fraction to deliver to preposition combustion furnace; After the cold air that comes from air blast is preheated to about 200 ℃ in empty, gas double pre-heating heat exchange of heat pipe, major part enters the sub-heat exchanger of air disturbance and carries out the secondary preheating, air is preheated to 400～440 ℃ in the turbolator heat exchanger after, deliver to hot-blast stove more by the road, because it is relative with gas temperature higher to enter the air of hot-blast stove, therefore hot-blast stove will be than higher to the wind pushing temperature of blast furnace, make the furnace temperature of blast furnace be easy to remain on higher temperature more, can save the fuel of filling in the blast furnace; Owing to come the temperature degree higher, coal gas is more prone to and the abundant catalytic combustion of air in the preposition combustion furnace, it is less to consume the coal gas amount when burning to uniform temperature, therefore can save coal gas; About 1100 ℃ the flue gas that preposition combustion furnace burning produces mixes the mixed flue gas of about 550～700 ℃ of formation with the flue gas that comes from the flue gas house steward, enter the sub-heat exchanger of air disturbance, to guarantee the secondary preheat temperature of air; Flue gas that the sub-heat exchanger of air disturbance is discharged and the flue gas that is come by breaching enter sky, gas double pre-heating heat exchange of heat pipe together, and cooled coal gas and cold air are carried out preheating, and flue gas is drained via air-introduced machine introducing chimney then.The utility model is because heat exchange mode is reasonable, make it adopt small device can reach better technical effect, therefore can make metal consumption few, simultaneously, because the gas preheating temperature is about 200 ℃, the gaspipe network operation is safer, and air preheat can be guaranteed the realization of high wind-warm syndrome more than 400～440 ℃, and preposition combustion furnace consumption blast furnace gas amount is few, enter the flue-gas temperature height of the sub-heat exchanger of air disturbance, heat transfer temperature difference is big, thus its make and operating cost low.The utility model can be widely used in the smelting iron and steel industry.
Description of drawings
Fig. 1 is the annexation figure of prior art hot-blast stove heat-exchanger rig.
Fig. 2 is the utility model annexation figure.
Wherein: 1,1 ' hot-blast stove, 2,2 ' breaching, 3,3 ' preposition combustion furnace, 4 hot-blast stove fume arms, 5 mix wind and smoke road, 6, the sub-heat exchanger of 6 ' air disturbance, 7 mix smoke pipe, 8 flue gas heat exchange of heat pipes, 9, the air heat exchange of heat pipe, 10 coal gas heat exchange of heat pipes, 11, air-introduced machine, 12,12 ' air blast, 13,13 ' chimney, 14,14 ' cool air hose, 15, hot-air duct, 16 hot-air arms, 17 hot-blast mains, 18,18 ' cooled coal gas house steward, 19 heating gas house stewards, 20 heating gas arms, 21 preposition combustion furnace gas flow control valves, 22 preposition combustion furnace air flow rate adjustment valves, 23 hot-blast stove fume bypass flow control valves, 24 wind mixed chamber, 25 coal gas turbolator heat exchangers, 26 hot air blowers.
The specific embodiment
As Fig. 2, be the combination heat-exchange system of the high wind-warm syndrome of blast furnace, main hot-blast stove 1, the sub-heat exchanger 6 of air disturbance, preposition combustion furnace 3, air blast 12, cooled coal gas house steward 18, empty, gas double pre-heating heat exchange of heat pipe, chimney 13, control valve and corresponding connecting line constitute; Empty, the gas double pre-heating heat exchange of heat pipe is by air heat exchange of heat pipe 9, coal gas heat exchange of heat pipe 10 and flue gas heat exchange of heat pipe 8 are combined into one and form, described air blast 12 air outlets are connected the air intlet of air heat exchange of heat pipe 9 by cool air hose 14, the air outlet slit of air heat exchange of heat pipe 9 is divided into two-way: the one tunnel through preposition combustion furnace air flow control valve 22 and the preposition combustion furnace 3 of hot-air arm 16 connections, another road is through the air intlet of the sub-heat exchanger 6 of warm-air pipe 15 connection air disturbance, and the air outlet slit of the sub-heat exchanger 6 of air disturbance is connected hot-blast stoves 1 through hot-blast main 17; The gas inlet that cooled coal gas house steward 18 connects coal gas heat exchange of heat pipe 10, the gas exit of coal gas heat exchange of heat pipe 10 is connected heating gas house steward 19, heating gas house steward 19 is divided into two-way again: the one tunnel directly connects hot-blast stove 1, preposition combustion furnace 3 is connected through preposition Shanghai gas flow control valve 21 in another road, and the exhanst gas outlet in preposition Shanghai 3 is connected one and mixed wind and smoke road 5; Hot-blast stove 1 is provided with breaching 2, the pipeline of breaching 2 is divided into two branch roads: the one tunnel through the mixed wind and smoke road of hot-blast stove fume arm 4 connections, also has one tunnel gas approach through hot-blast stove fume bypass flow control valve 23 and mixed smoke pipe 7 connection flue gas heat exchange of heat pipes 8; The exhanst gas outlet of the sub-heat exchanger 6 of air disturbance is connected in the outlet that mixes wind and smoke road 5, the exhanst gas outlet of the sub-heat exchanger 6 of air disturbance is connected the gas approach of flue gas heat exchange of heat pipe 8 through mixing smoke pipe 7, the exhanst gas outlet of flue gas heat exchange of heat pipe 8 is connected the import of air-introduced machine 11, and the air outlet of air-introduced machine 11 is connected chimney 13.
The utility model is not limited to the foregoing description, and described sky, gas double pre-heating heat exchange of heat pipe also can be by air heat exchange of heat pipes 9 independently, and coal gas heat exchange of heat pipe 10 and flue gas heat exchange of heat pipe 8 are formed.
Claims (3)
1, the combination heat-exchange system of the high wind-warm syndrome of a kind of blast furnace is characterized in that: comprise hot-blast stove, the sub-heat exchanger of air disturbance, preposition combustion furnace, air blast, cooled coal gas house steward, sky, gas double pre-heating heat exchange of heat pipe and chimney; Described blower outlet is connected air intlet empty, the gas double pre-heating heat exchange of heat pipe by cool air hose, air outlet slit empty, the gas double pre-heating heat exchange of heat pipe is divided into two-way, one the tunnel connects preposition combustion furnace through preposition combustion furnace air flow control valve, the air intlet of the sub-heat exchanger of air disturbance is connected on another road, and the air outlet slit of the sub-heat exchanger of air disturbance is connected hot-blast stove; The cooled coal gas house steward connects the gas inlet of sky, gas double pre-heating heat exchange of heat pipe, gas exit empty, the gas double pre-heating heat exchange of heat pipe is divided into two-way, one the tunnel directly connects hot-blast stove, preposition combustion furnace is connected through preposition combustion furnace gas flow control valve in another road, and the wind and smoke road is connected-mixed to the exhanst gas outlet of preposition combustion furnace; Hot-blast stove is provided with breaching, and breaching is divided into two-way, and one the tunnel connects mixed wind and smoke road, also has one tunnel gas approach through hot-blast stove fume bypass flow control valve connection sky, gas double pre-heating heat exchange of heat pipe; The gas approach of the sub-heat exchanger of air disturbance is connected in the outlet that mixes the wind and smoke road, the exhanst gas outlet of the sub-heat exchanger of air disturbance is connected the gas approach of sky, gas double pre-heating heat exchange of heat pipe, exhanst gas outlet empty, the gas double pre-heating heat exchange of heat pipe is connected the air inlet of air-introduced machine, and the air outlet of air-introduced machine is connected chimney.
2, the combination heat-exchange system of the high wind-warm syndrome of blast furnace according to claim 1 is characterized in that: described sky, gas double pre-heating heat exchange of heat pipe are monoblock type parallel connection heat pipe heat exchanger.
3, the combination heat-exchange system of the high wind-warm syndrome of blast furnace according to claim 1 is characterized in that: described sky, gas double pre-heating heat exchange of heat pipe are split type parallel connection heat pipe heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200240149U CN2669131Y (en) | 2004-01-05 | 2004-01-05 | Combined heat exchange system for blast furnace high air temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200240149U CN2669131Y (en) | 2004-01-05 | 2004-01-05 | Combined heat exchange system for blast furnace high air temperature |
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| Publication Number | Publication Date |
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| CN2669131Y true CN2669131Y (en) | 2005-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2004200240149U Expired - Fee Related CN2669131Y (en) | 2004-01-05 | 2004-01-05 | Combined heat exchange system for blast furnace high air temperature |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928797A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace |
| CN102759108A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Parallel type air coal dual-preheating radiation tube preheating system and preheating method |
| CN102759106A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Tandem type air gas dual-preheating radiation tube preheating system and air coal gas preheating method |
| CN103045786A (en) * | 2011-10-11 | 2013-04-17 | 凯斯通环保设备有限公司 | High-blast-temperature combinative heat exchange system of blast furnace |
| CN111707698A (en) * | 2020-07-16 | 2020-09-25 | 西安交通大学 | Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode |
-
2004
- 2004-01-05 CN CNU2004200240149U patent/CN2669131Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928797A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace |
| CN103045786A (en) * | 2011-10-11 | 2013-04-17 | 凯斯通环保设备有限公司 | High-blast-temperature combinative heat exchange system of blast furnace |
| CN102759108A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Parallel type air coal dual-preheating radiation tube preheating system and preheating method |
| CN102759106A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Tandem type air gas dual-preheating radiation tube preheating system and air coal gas preheating method |
| CN111707698A (en) * | 2020-07-16 | 2020-09-25 | 西安交通大学 | Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050105 Termination date: 20120105 |