CN200996026Y - Assembled heat-exchanging system for realizing hot blast furnace - Google Patents

Assembled heat-exchanging system for realizing hot blast furnace Download PDF

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Publication number
CN200996026Y
CN200996026Y CN 200620170674 CN200620170674U CN200996026Y CN 200996026 Y CN200996026 Y CN 200996026Y CN 200620170674 CN200620170674 CN 200620170674 CN 200620170674 U CN200620170674 U CN 200620170674U CN 200996026 Y CN200996026 Y CN 200996026Y
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CN
China
Prior art keywords
air
gas
low temperature
heat exchanger
pipe
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CN 200620170674
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Chinese (zh)
Inventor
梁怀琪
朱俊萍
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江苏中天能源设备有限公司
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Priority to CN 200620170674 priority Critical patent/CN200996026Y/en
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Publication of CN200996026Y publication Critical patent/CN200996026Y/en

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Abstract

A combined high temperature heat-exchanging system of air heating furnace consists of an air-heating furnace, a prepositive combustion furnace, a fan, a cold air main pipe, a by-pass air pipe, a cold gas main pipe, a by-pass gas pipe, a by-pass smoke pipe, an induced draft fan and a chimney. One diffluence of the air outlet of the fan communicates directly with the air-heating furnace by way of the by-pass air pipe. One diffluence of the cold gas main pipe communicates directly with the air-heating furnace by way of a gas pipe. The hot air outlet of the air-heating furnace communicates with the blast furnace. One diffluence of the smoke main pipe on the air-heating furnace communicates directly with the chimney. The utility model has the characteristics that the system also comprises a medium-low temperature heat-pipe heat exchanger of mixed air and a medium-low temperature heat-pipe heat exchanger of classified gas. The other diffluence of the air outlet of the fan communicates with the air inlet of the medium-low temperature heat-pipe heat exchanger of mixed air by way of the cold air pipe. The air outlet of the medium-low temperature heat-pipe heat exchanger of mixed air is divided into two diffluences. One diffluence extends through the airflow-controlling valve of the prepositive combustion furnace and communicates with the burner of the prepositive combustion furnace. The other diffluence communicates with the air-heating furnace.

Description

Realize the combination heat-exchange system of the high wind-warm syndrome of hotblast stove
Technical field
The utility model relates to a kind of combination heat-exchange system of realizing the high wind-warm syndrome of hotblast stove, is use when being used to make steel or smelt iron a kind of for carrying high wind-warm syndrome to carry out reasonable heat exchange and making full use of the system of waste heat, belongs to the steel smelting equipment technical field.
Background technology
In the existing Iron and Steel Production equipment, a kind of hotblast stove heat-exchanger rig is arranged, it is mainly by hotblast stove 1 ', coal gas turbolator interchanger 5 ', the sub-interchanger 4 ' of air disturbance, preposition roasting kiln 3 ', wind mixed chamber 6 ', smoke induced draught fan 7 ', gas blower 8 ' and cold wind house steward 9 ', cooled coal gas house steward 12 ', chimney 11 ' and formations such as due pipeline and valve, gas blower 8 ' air outlet is divided into three the tunnel behind cold-air duct 9 ': the first via is connected preposition roasting kiln 3 ' through valve, combustion air directly is provided can for preposition roasting kiln 3 '; The second the tunnel through valve connection hotblast stove 1 ', combustion air directly is provided can for hotblast stove 1 '; Third Road is directly connected the air intlet of the sub-interchanger 4 ' of air disturbance, and the air of the sub-interchanger 4 ' of air disturbance is connected hotblast stove 1 ' through valve; Cooled coal gas is sent in the system through cooled coal gas house steward 12 ', and cooled coal gas house steward 12 ' is divided into three the tunnel in system: the first via is connected hotblast stove 1 ' through valve, directly gives hotblast stove 1 ' air feed; The second the tunnel directly connects preposition roasting kiln 3 '; Also has one tunnel gas inlet of connecting coal gas turbolator interchanger 5 ', the gas exit of coal gas turbolator interchanger 5 ' is connected hotblast stove 1 ' through valve, hotblast stove 1 ' is provided with hot-blast outlet and breadboard 2 ', hot-air mouth can be used for sending into high-temperature hot-air in blast furnace, breadboard 2 ' is used to discharge low-temperature flue gas, and breadboard 2 ' a tunnel is connected the blast inlet of induced draft fan 7 ', also has one the tunnel through valve connection chimney 11 ', in case of necessity, can directly discharge flue gas from chimney 11 '; The air outlet of smoke induced draught fan 7 ' is connected wind mixed chamber 6 ', described wind mixed chamber 6 ' is positioned at preposition roasting kiln 3 ' top, its inside is interconnected, the cooled coal gas mixed firing that freezing air that combustion air transports in the preposition roasting kiln 3 ' and cooled coal gas pipe 12 ' transport, gas fume after burning upwards enters wind mixed chamber 6 ', the hot blast that comes with smoke induced draught fan 7 ' in wind mixed chamber 6 ' mixes the back mutually and discharges from the mixed flue gas outlet that is positioned at wind mixed chamber 6 ' top, the mixed flue gas outlet is divided into two-way, wherein, one the tunnel enters the sub-interchanger 4 ' of air disturbance carries out heat exchange, also have one the tunnel to enter in the coal gas turbolator interchanger 5 ' and carry out heat exchange, the two-way flue gas after heat exchange is combined into one the tunnel and connects chimney 11 '.
When work, adopt a plurality of hotblast stoves 1 ' to provide hot blast to blast furnace, under equal prerequisite, hotblast stove 1 ' 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 makes air and cooled coal gas enter that hotblast stove 1 ' is preceding to have carried out preheating by corresponding turbolator interchanger, temperature in the hotblast stove 1 ' 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 hotblast stove 1 ' flue gases must be incorporated in the wind mixed chamber 6 ', mix mutually with about 1100 ℃ products of combustion of preposition roasting kiln 3 ', form 500~550 ℃ mixed flue gas, flow into coal gas turbolator interchanger 5 ' and the sub-interchanger 4 ' of air disturbance respectively, make air and gas preheating to 250~300 ℃, because turbolator heat exchanger heat transfer coefficient is low, for reaching corresponding heat exchange demand, need higher heat transfer temperature difference, the volume of equipment is big, metal consumption is big, the facility investment height; Because in the preposition roasting kiln 3 ' is freezing air and cooled coal gas, make it reach higher funnel temperature a large amount of coal gas that need burn, make the working cost height of equipment.
Also has superloy-hydro-thermal tube heat-exchanger in the prior art, it adopts the gas of WATER AS FLOW MEDIUM, the thermal energy transfer that the liquid biphase changes the heat pipe hot junction arrives the heat pipe cold junction, its heat-transfer effect is good, some heat pipes can in parallelly use, for making the hot tube heat exchanger compact construction, had hot tube heat exchanger has been arranged in parallel way into one, as giving the sky of air and gas preheating simultaneously, the gas double pre-heating hot tube heat exchanger, comprise gas inlet, gas exit, gas approach, exhanst gas outlet, air intlet, air and mutual isolated air, coal gas heat exchange body, the heat pipe hot junction is arranged in the exhaust gases passes, flue gas enters the exhaust gases passes of interchanger and discharges from exhanst gas outlet from gas approach, give heat pipe with thermal energy transfer simultaneously, from air intlet and next air and the coal gas of gas inlet, air after preheating and coal gas flow out from air and gas exit heat pipe with the systemic heat transferred of exhaust gases passes.But because of the working range of carbon steel-water heat tube heat-exchanger narrow, can not be with air and gas preheating to higher temperature.
The utility model content
The purpose of this utility model provides a kind of combination heat-exchange system of realizing the high wind-warm syndrome of hotblast stove, overcome existing hotblast stove heat-exchanger rig because the turbolator heat exchanger heat transfer coefficient that adopts is low, in order to reach corresponding heat exchange demand, need higher heat transfer temperature difference, the volume of equipment is big, metal consumption is big, the facility investment height; Because it enters in the preposition roasting kiln is freezing air and cooled coal gas, make it reach higher funnel temperature a large amount of coal gas that need burn, make the high deficiency of working cost of equipment, realize reasonable heat exchange and make full use of waste heat, equipment volume is little, and metal consumption is few, and manufacturing and working cost are low.
The purpose of this utility model is achieved through the following technical solutions, a kind of combination heat-exchange system of realizing the high wind-warm syndrome of hotblast stove, comprise hotblast stove, preposition roasting kiln, gas blower, freezing air house steward, air by-pass pipe, cooled coal gas house steward, coal gas bypass pipe, flue gas bypass pipe, induced draft fan and chimney, blower outlet one road is directly connected hotblast stove from the air by-pass pipe, cooled coal gas house steward one tunnel directly connects hotblast stove through gas pipe, the external blast furnace of the hot-blast outlet of hotblast stove, breadboard one tunnel on the hotblast stove is directly connected chimney, it is characterized in that:
Low temperature heat pipe heat exchanger in low temperature heat pipe heat exchanger in the air built-up type, the class split coal gas built-up type also is set in the described system;
Another route cold-air duct of described blower outlet is connected the air intlet of low temperature combined heat pipe exchanger in the air;
The air of cryogenic heat exchanger is divided into two-way in the described air built-up type, and one the tunnel connects preposition roasting kiln burner through preposition roasting kiln air flow control valve, and hotblast stove is connected on another road;
The gas inlet that low temperature heat pipe heat exchanger in the class split coal gas built-up type is connected through the cooled coal gas arm in another road of described cooled coal gas house steward;
The gas exit of low temperature heat pipe heat exchanger is divided into two-way in the described class split coal gas built-up type, and one the tunnel directly connects hotblast stove, and preposition roasting kiln burner is connected through preposition roasting kiln gas flow variable valve in another road;
The exhanst gas outlet of described preposition roasting kiln is connected and is mixed the wind and smoke road;
Another road of breadboard on the described hotblast stove is advanced high-temperature flue gas that mixing wind tube road and preposition roasting kiln produce and is mixed and improve the gas approach of connecting low temperature heat pipe heat exchanger in sky, the coal gas built-up type after the flue-gas temperature that hotblast stove discharges; Connect the import of induced draft fan in sky, coal gas built-up type behind the low temperature heat pipe heat exchanger, the air outlet of induced draft fan is connected chimney.
The utility model is when normal the use, can adopt a plurality of hotblast stoves to give the blast furnace hot wind supply, after the cooled coal gas that comes from the cooled coal gas house steward is preheated to about 250 ℃~300 ℃ in the low temperature heat pipe heat exchanger in empty, coal gas built-up type, major part is delivered to hotblast stove, also has small portion to deliver to preposition roasting kiln; After the freezing air that comes from gas blower is preheated to about 250 ℃~300 ℃ in the low temperature heat pipe heat exchanger in empty, coal gas built-up type, deliver to hotblast stove, preposition roasting kiln by the road, because it is relative with gas temperature higher to enter the air of hotblast stove, therefore hotblast stove gives the wind pushing temperature of blast furnace just high, make the furnace temperature of blast furnace be easy to more remain under the higher temperature, 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 roasting kiln, it is less to consume the coal gas amount when burning to certain temperature, therefore can save coal gas; About 900 ℃ the flue gas that preposition roasting kiln burning produces mixes the mixed flue gas that forms about 400~500 ℃ and enters low temperature heat pipe heat exchanger in sky, the coal gas built-up type with the flue gas that comes from the flue gas house steward, reach about 250 ℃~300 ℃ with the preheating temperature that guarantees sky, coal gas; Introduce chimney through induced draft fan and drain for about about 150 ℃ by the flue-gas temperature behind the low temperature heat pipe heat exchanger in the built-up type.The utility model is reasonable owing to heat exchange mode, the heat transfer efficiency height, and the fume afterheat of having recycled hotblast stove makes it adopt small device can reach corresponding energy-saving effect, and its equipment metal consumption is economized most, and manufacturing and working cost are minimum.Simultaneously, because gas change heater adopts the split type heat exchange structure of class, making has a transition section between coal gas and the exhaust gases passes, guarantees that coal gas and flue gas do not scurry mutually, makes the coal gas heat-exchange equipment safer.Thereby the utility model can be widely used in the smelting iron and steel industry.
Description of drawings
Fig. 1 is the annexation figure of existing hotblast stove heat-exchanger rig;
Fig. 2 is annexation figure of the present utility model;
Among Fig. 2,1 hotblast stove, 2 breadboards, 3 preposition roasting kilns, 4 precell branch gas tubes, 5 precell air arms, 6 cooled coal gas house stewards, 7 flue gas house stewards, 8 air mains, low temperature heat pipe heat exchanger in the 9 air built-up types, low temperature heat pipe heat exchanger in the 10 class split coal gas, 11 induced draft fans, 12 branch gas tubes, 13 chimneys, 14 hot-blast stove fume arms, 15 flue gas mixing tubes, 16 precell fume pipes, 17 gas blowers, 18 air arms.
Embodiment
Further specify the utility model in conjunction with the accompanying drawings and embodiments, as shown in Figure 2, the utility model is made of low temperature heat pipe heat exchanger 10, chimney 13, regulated valve and corresponding connecting pipeline in low temperature heat pipe heat exchanger 9, the class split coal gas built-up type in hotblast stove 1, preposition roasting kiln 3, cooled coal gas house steward 6, freezing air house steward 8, the air built-up type; Low temperature heat pipe heat exchanger 10 was one-piece construction, 10 flue gas case parallel connection in the low temperature heat pipe heat exchanger in flue gas case in the air built-up type in the low temperature heat pipe heat exchanger 9 and the class split coal gas during low temperature heat pipe heat exchanger 9, class split coal gas made up in the air built-up type; The cold wind one tunnel that described gas blower produces directly enters hotblast stove through air main; One the tunnel connects the air intlet of low temperature heat pipe heat exchanger 9 in the air built-up type, the air of low temperature heat pipe heat exchanger 9 imports and to be divided into two-way behind the air main 8 in the air built-up type: the one tunnel connects preposition roasting kiln 3 through precell air arm 5 and control valve, and hotblast stove 1 is connected through heating duct and control valve in another road.Cooled coal gas house steward one tunnel directly enters hotblast stove through gas main; One the tunnel connects the gas inlet of low temperature heat pipe heat exchanger 10 in the class split coal gas built-up type, the gas exit of low temperature heat pipe heat exchanger 10 is divided into two-way again after importing gas main in the class split coal gas built-up type: the one tunnel through gas main and control valve connection hotblast stove 1, preposition roasting kiln 3 is connected through branch gas tube 4 and control valve in another road, and the exhanst gas outlet of preposition roasting kiln 3 is connected flue gas mixing tube 15; Hotblast stove 1 is provided with breadboard 2, and the pipeline of breadboard 2 is divided into two branch roads: the one tunnel through fume pipe 7 and control valve connection chimney 13; One road hot-blast stove fume arm 14 is connected low temperature heat pipe heat exchanger gas approach in sky, the coal gas with the flue gas of precell fume pipe 16 after flue gas mixing tube 15 mixes; The low temperature heat pipe heat exchanger exhanst gas outlet is connected the import of induced draft fan 11 in sky, the coal gas built-up type.Reach after the low temperature cigarette that the high-temperature flue gas that preposition roasting kiln 3 produces and hotblast stove 1 are discharged closes and advance to make up heat-exchanger rig about 400 ℃ and sky (coal) gas is preheating to about 250 ℃~300 ℃ delivers to hotblast stove 1, make up heat-exchanger rig exhanst gas outlet temperature and be controlled at about 150 ℃; Utilize Cryo Heat Tube and moderate temperature heat pipe various combination to adapt to the flue-gas temperature scope of broad.

Claims (2)

1, a kind of combination heat-exchange system of realizing the high wind-warm syndrome of hotblast stove, comprise hotblast stove, preposition roasting kiln, gas blower, freezing air house steward, air by-pass pipe, cooled coal gas house steward, coal gas bypass pipe, flue gas bypass pipe, induced draft fan and chimney, described blower outlet one road is directly connected hotblast stove from the air by-pass pipe, described cooled coal gas house steward one tunnel directly connects hotblast stove through gas pipe, the external blast furnace of the hot-blast outlet of hotblast stove, breadboard one tunnel on the hotblast stove is directly connected chimney, it is characterized in that:
Low temperature heat pipe heat exchanger in low temperature heat pipe heat exchanger in the air built-up type, the class split coal gas built-up type also is set in the described system;
Another route cold-air duct of described blower outlet is connected the air intlet of low temperature combined heat pipe exchanger in the air;
The air of cryogenic heat exchanger is divided into two-way in the described air built-up type, and one the tunnel connects preposition roasting kiln burner through preposition roasting kiln air flow control valve, and hotblast stove is connected on another road;
The gas inlet that low temperature heat pipe heat exchanger in the class split coal gas built-up type is connected through the cooled coal gas arm in another road of described cooled coal gas house steward;
The gas exit of low temperature heat pipe heat exchanger is divided into two-way in the described class split coal gas built-up type, and one the tunnel directly connects hotblast stove, and preposition roasting kiln burner is connected through preposition roasting kiln gas flow variable valve in another road;
The exhanst gas outlet of described preposition roasting kiln is connected and is mixed the wind and smoke road;
Another road of breadboard on the described hotblast stove is advanced high-temperature flue gas that mixing wind tube road and precell produce and is mixed and improve the gas approach of connecting low temperature heat pipe heat exchanger in sky, the coal gas built-up type after the flue-gas temperature that hotblast stove discharges; Connect the import of induced draft fan in sky, coal gas built-up type behind the low temperature heat pipe heat exchanger, the air outlet of induced draft fan is connected chimney.
2, the combination heat-exchange system of the high wind-warm syndrome of realization hotblast stove according to claim 1, it is characterized in that low temperature heat pipe heat exchanger is one-piece construction in low temperature heat pipe heat exchanger in the described air built-up type, the class split coal gas built-up type, the flue gas case parallel connection in flue gas case in the air built-up type in the low temperature heat pipe heat exchanger and the class split coal gas in the low temperature heat pipe heat exchanger.
CN 200620170674 2006-12-19 2006-12-19 Assembled heat-exchanging system for realizing hot blast furnace CN200996026Y (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101825283A (en) * 2010-04-30 2010-09-08 山西太钢不锈钢股份有限公司 Method for improving thermal efficiency of regenerative heating furnace
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
CN101928796A (en) * 2010-07-29 2010-12-29 江苏中天能源设备有限公司 High wind temperature energy saving and emission reduction combined preheating method for blast furnace
CN103131813A (en) * 2011-11-29 2013-06-05 上海雷林工程技术有限公司 Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace
CN103320561A (en) * 2013-06-08 2013-09-25 中冶南方工程技术有限公司 Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof
CN103333976A (en) * 2013-06-08 2013-10-02 中冶南方工程技术有限公司 Flue gas waste heat utilization system and flue gas waste heat utilization method of hot blast furnace

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101825283A (en) * 2010-04-30 2010-09-08 山西太钢不锈钢股份有限公司 Method for improving thermal efficiency of regenerative heating furnace
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
CN101928796A (en) * 2010-07-29 2010-12-29 江苏中天能源设备有限公司 High wind temperature energy saving and emission reduction combined preheating method for blast furnace
CN103131813A (en) * 2011-11-29 2013-06-05 上海雷林工程技术有限公司 Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace
CN103320561A (en) * 2013-06-08 2013-09-25 中冶南方工程技术有限公司 Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof
CN103333976A (en) * 2013-06-08 2013-10-02 中冶南方工程技术有限公司 Flue gas waste heat utilization system and flue gas waste heat utilization method of hot blast furnace
CN103333976B (en) * 2013-06-08 2014-11-05 中冶南方工程技术有限公司 Flue gas waste heat utilization system and flue gas waste heat utilization method of hot blast furnace

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Granted publication date: 20071226

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