CN85108099A - The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes - Google Patents
The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes Download PDFInfo
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- CN85108099A CN85108099A CN 85108099 CN85108099A CN85108099A CN 85108099 A CN85108099 A CN 85108099A CN 85108099 CN85108099 CN 85108099 CN 85108099 A CN85108099 A CN 85108099A CN 85108099 A CN85108099 A CN 85108099A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000003546 flue gas Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 6
- 239000003034 coal gas Substances 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- 239000003517 fume Substances 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 241000274582 Pycnanthus angolensis Species 0.000 claims description 9
- 239000011087 paperboard Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 229910000805 Pig iron Inorganic materials 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000571 coke Substances 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 208000011580 syndromic disease Diseases 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Feature of the present invention is that hot-blast stove fume is introduced heat pipe heat exchanger unit, comes preheating gas and air with fume afterheat, improves Combustion of Hot Air Furnace temperature and hot blast temperature.This device is made up of heat exchange of heat pipe, pipeline, valve and automatic instrument(s).Have flue gas pipeline, gas preheating pipeline, air preheat pipeline, steam blowing pipeline, security monitoring and switched system.Easy to operate, regulate flexibly, safe and reliable.On probation on the 300m3 blast furnace, coal gas and air can be preheating to 200 ℃, and hot blast temperature improves 76 ℃, and the hot-blast stove thermal efficiency improves 7.5%, reduce by 12 kilograms of/ton iron of coke ratio, 570,000 yuan of year economic benefits.
Description
One relates to the method and apparatus that the blast funnace hot blast stove flue gas waste heat recovery utilizes
The necessary air blast of blast furnace ironmaking, hot-blast stove is the equipment that is used for heating air blast, facts have proved, improves wind-warm syndrome and can reduce coke ratio, can increase output.Along with continually strengthening of blast furnace process, more and more lower as the calorific capacity of the blast furnace gas of hot-blast stove fuel, it is difficult obtaining high wind-warm syndrome, and still, the heat that hot-blast stove fume distributes is very considerable.If fume afterheat is reclaimed, preheating gas and combustion air are that hot-blast stove uses low combustion value furnace gas to obtain a new way of high wind-warm syndrome, energy-saving and production-increase.
In recent years, people seek to improve wind-warm syndrome, progressively pay attention to the hot-blast stove fume UTILIZATION OF VESIDUAL HEAT IN, but be mainly used to give the hot-blast stove combustion air, and for the gas preheating of intense explosion, still there is not desirable device, known to the inventor, " heating agent formula " heat exchanger of Japan's employing at present, hot media is by pump input flue gas heat exchange device, send into heat exchanger respectively by pump again after the heat absorption, add heating gas and air, hot media recycles, but the weak point of this technology is: the equipment complexity, make difficulty, heat transfer medium is combustibles, easily breaking out of fire, and need power to flow, equipment is required height, invest wasteful.
The objective of the invention is to utilize hot pipe technique, reclaim the hot-blast stove fume waste heat, the coal gas of heating flame hot-blast stove and combustion air improve the hot-blast stove thermal efficiency, improve Combustion of Hot Air Furnace temperature and hot blast temperature, and energy savings improves ironmaking output.
The present invention can improve the principle of ignition temperature and utilize the characteristics of heat exchange of heat pipe movement-less part according to preheating gas and combustion air, adopt the novel heatproof combination sealing filler of inventor's development, solved the technical problem of gas leak in the heat exchanger, succeed in developing heat exchange of heat pipe, thereby successfully carried out coal gas and given heat, simultaneously also combustion air is carried out preheating, the heat exchange of heat pipe structure as shown in Figure 1.
Heat pipe as shown in Figure 2.
This device is by original hot-blast stove, flue, chimney, newly-installed coal gas heat exchange of heat pipe, the air heat exchange of heat pipe, air-introduced machine, flue and valve, combustion air pipeline and valve, gas piping and valve, heat pipe heat exchanger unit that instrument for automatic control is formed, this device has the flue gas pipeline system, coal gas gives the pipe line system, air preheat pipeline system, coal gas scavenging pipeline system, safety monitoring system, heat exchange of heat pipe input and withdraw from the switched system of use, flue gas, coal gas, combustion air is respectively by the heat exchange of heat pipe of flowing through of pipeline separately, carry out heat exchange, flue gas behind the heat release enters chimney through air-introduced machine, and combustion air after the preheating and coal gas are sent to hot-blast stove for burning.The present invention is provided with perfect safety monitoring system and regulates the exhaust gas volumn that enters heat exchange of heat pipe, the preheat temperature of control combustion air and coal gas, and when operate as normal, the flue gas heat exchange of heat pipe of all flowing through discharges after the heat exchange.When coal gas after the preheating or too high temperature of air, the flue gas part heat exchange of heat pipe of flowing through, part of smoke is directly discharged, and with the exhaust gas volumn that minimizing enters heat exchange of heat pipe, guarantees that heat-pipe working medium works being lower than under 250 ℃ the safety condition.When blast furnace refluence damping down, flue gas is directly discharging all, the heat exchange of heat pipe of not flowing through, and whole air-supply, to burn, change stove, smoke evacuation etc. easy to operate, regulates flexible, safe and reliable.
Scatter and disappear in order to reduce heat, after preheating gas piping, air duct and advance heat exchanger before flue outside lay heat-insulation layer.
Advantage of the present invention is:
1. simple, easy row is made, safeguarded to compact conformation, reduced investment, and operating cost is cheap.
2. sealing is reliable, and the security monitoring measure is reasonable, guarantees system safety operation, particularly the safety of gas preheating.
3. properly handle the contradiction of heat exchange effect and pressure drop, the resistance of gas change heater is decreased less than 20 millimeters of water, and heat transfer coefficient is greater than 100KCal/M
2H ℃.
4. obtain high wind-warm syndrome with low combustion value furnace gas.Tangible economic benefit is arranged, at 300M
3On probation on the blast furnace, hot-blast stove discharged flue gas temperature is reduced to about 135 ℃ by original about 320 ℃; Combustion air and coal gas can give heat simultaneously to about 200 ℃, and blast furnace air temperature improves 76 ℃, and the ironmaking coke ratio can reduce by 12 kilograms of/ton iron, and the hot-blast stove thermal efficiency improves 7.5%, 570,000 yuan of year economic benefits, and its investment, 1 year is promptly recoverable.
The embodiment represented below in conjunction with accompanying drawing describes the present invention
Accompanying drawing 1, heat exchange of heat pipe structural map.
Heat exchange of heat pipe is by the synthetic casing of many same model heat pipe heat, it is made up of heat-insulation layer (1), box frame (2), movable boxboard (3), boxboard (4), insulation material (5), retention mechanism (6), upper limit plate (7), seal diaphragm (8), heat-pipe elements (9), combination sealing filler (10), lower limiting board (11), pipe joint (12) etc., box frame (2) is a square box, left and right side and bottom surface boxboard (4) are welded on the box frame (2), and end face boxboard (3) is movable boxboard.Can installation and removal, the two ends of casing are provided with four pipe joints (12), the pipe joint both sides of the heat release zone of coal gas heat exchange of heat pipe are respectively left a purge hole, are arranged requirement by heat-pipe elements (9) in case, retention mechanism (6) is fixed on the inboard of box frame (2), and with upper limit plate (7), seal diaphragm (8), lower limiting board (11) perforate, seal diaphragm (8) is positioned at the adiabatic section of heat-pipe elements (9), with seal diaphragm (8) and boxboard (4) welding, weld seam is tight by this requirement.Heat-pipe elements (9) is by retention mechanism (6) card press fit, pass the corresponding eyelet of upper limit plate (7), seal diaphragm (8), lower limiting board (11) respectively, suspension is got up, this kind fixed form, be convenient to installation and removal, unclamp retention mechanism (6) as long as open movable boxboard (3), heat-pipe elements (9) is just can take out by single Zhi Yiyi.Upper limit plate (7) is positioned at heat-pipe elements (9) heat release section fin top, lower limiting board (11) is positioned at the below of the endotherm section fin of heat-pipe elements (9), between upper limit plate (7) and the box top, filled heat insulating material between lower limiting board and the tank floor (5) insulation.At the eyelet place of heat-pipe elements (9) with seal diaphragm (8) handing-over, combination sealing filler (10) in addition, seal diaphragm (8) tightly separates to become two zones up and down with the heat exchange of heat pipe box house, do not collaborate mutually, the first half claims the heat release zone of heat exchange of heat pipe, and the latter half claims the heat absorption district of heat exchange of heat pipe.High-temperature flue gas is fed the heat absorption district of heat exchange of heat pipe, the endotherm section of heat hot tube elements, make working media vaporization in the heat pipe, under the effect of the steam that produces pressure reduction in pipe, flow to the heat release section of heat pipe, combustion air or coal gas absorb heat by the heat release zone of heat exchange of heat pipe, and the steam of the medium in the heat pipe is condensed into liquid, under the gravity effect, liquid turns back to endotherm section along the heat pipe inwall.Circulation and so forth realizes the purpose that flue gas waste heat recovery utilizes.
Accompanying drawing 2, heat pipe heat exchanger unit fume afterheat utilize flow chart.
Among the figure: automatic regulating valve door (1), flue (2), valve (3), flue (4) and (4 '), pressure instrumentation (5) and (5 '), valve (6) and (6 '), air heat exchange of heat pipe (7), coal gas heat exchange of heat pipe (7 '), automatic regulating valve door (8) and (8 '), pipeline (9) and (9 '), temperature instrumentation (10), air-introduced machine (11), air blast (12), valve (13), pipeline (14), valve (15) and (16), temperature instrumentation (17), pipeline (18), valve (19), pipeline (20) and (21), pipeline (22), valve (23) and (24), pipeline (25), temperature instrumentation (26), pressure instrumentation (27), valve (28), pipeline (29), hot-blast stove (30), chimney (31), pipeline (32), valve (33), (34), (35), (36), (37), instrument board (38) constitutes six systems by above-mentioned device:
1. flue gas pipeline system.Be by valve (3), pipeline (4) and (4 '), valve (6) and (6 '), the heat absorption district of air heat exchange of heat pipe (7) and gas change heater (7 '), valve (8) and (8 '), pipeline (9) and (9 '), air-introduced machine (11) are formed.320 ℃ flue gas enters heat exchange of heat pipe, after heat exchange owing to be subjected to the suction of air-introduced machine (11), become 135 ℃ low-temperature flue gas, through automatic regulating valve door (8) and (8 '), pipeline (9) and (9 ') enter chimney (31) by air-introduced machine (11).
2. air gives the pipe line system.Heat release zone, valve (16), pipeline (21) by air blast (12), valve (13), pipeline (14), valve (15), air heat exchange of heat pipe (7) are formed, and cold air is introduced the air heat exchange of heat pipe, are sent to hot-blast stove after giving heat.
3. coal gas gives the pipe line system.By the heat release zone of pipeline (22), valve (23), coal gas heat exchange of heat pipe (7 '), valve (24), pipeline (25) and (29) are formed, cooled coal gas enters heat exchange of heat pipe give heat after, be sent to hot-blast stove.
4. steam blowing pipe-line system.Form by pipeline (32), valve (33), (34), (35), (36), (37) etc.When shutting down maintenance, introduce steam and purge, drive coal gas and give coal gas in the pipe line system.
5. safety monitoring system: keeping the heat pipe operating temperature at set-point, is to prevent the too high key that sets off an explosion of steam pressure in the heat pipe.This system is by automatic regulating valve door (1), (8), (8 '), air-introduced machine (11) is set up control valve, temperature instrumentation (10), (17), (26), pressure instrumentation (5), (5 '), (27) and instrument board are formed, and control with angle stroke motor drive mechanism.Automatic regulating valve door (1), (8), (8 ') and air-introduced machine (11) are set up valve, and opposite heat tube heat exchanger and air-introduced machine carry out temperature protection, and flue gas flow is controlled.When the temperature of coal gas, air surpasses set-point, automatic regulating valve door (8), (8 ') turn down, and automatic regulating valve door (1) leaves greatly, the exhaust gas volumn that enters heat exchange of heat pipe with minimizing, increase the direct discharge capacity of flue gas, to guarantee that giving hot temperature remains on set-point.When the flue-gas temperature by air-introduced machine (11) surpassed allowable temperature (220 ℃), the inlet valve that air-introduced machine is set up turned down automatically, and automatic regulating valve door (1) also leaves greatly, thus the safe operation under the operating mode of regulation of assurance system.
6. heat exchange of heat pipe input and withdraw from the switched system of use.The input of coal gas heat exchange of heat pipe (7 ') and withdraw from use is that the keying by valve (23) and valve (28) realizes.When coming into operation, valve (23) is opened, and valve (28) closes, and cooled coal gas enters heat exchange of heat pipe (7 ').Withdraw from when using, valve (23) closes, and valve (28) is opened, and cooled coal gas can directly enter hot-blast stove, and the input of air heat exchange of heat pipe (7) and withdraw from use is that the keying by valve (15) and valve (19) realizes.When coming into operation, valve (15) is opened, and valve (19) closes, and air enters heat exchange of heat pipe (7).Withdraw from when using, valve (15) closes, and valve (19) is opened, and cold air directly enters hot-blast stove.
Claims (9)
1, a kind of method of blast-furnace hot-air furnace flue gas exhaust heat utilization, it is characterized in that hot-blast stove fume is introduced heat pipe, reclaim fume afterheat, give heating gas and combustion air respectively, improve Combustion of Hot Air Furnace temperature and hot blast temperature, improve the hot-blast stove thermal efficiency, reduce the ironmaking energy resource consumption, increase pig iron output.
2, a kind of device of blast-furnace hot-air furnace flue gas exhaust heat utilization, it is characterized in that the heat pipe heat exchanger unit be made up of the combined heat exchange of heat pipe of single tube and pipeline, valve, instrument for automatic control, this device has flue gas pipeline system, gas preheating pipe-line system, combustion air preheating pipe-line system, steam blowing pipe-line system, safety monitoring system, heat exchange of heat pipe input and withdraws from the switched system of use.
3, device according to claim 2, it is characterized in that said heat exchange of heat pipe is a square box, is to be made of heat-insulation layer, box frame, boxboard, movable boxboard, insulation material, retention mechanism, upper limit plate, seal diaphragm, heat-pipe elements, combination sealing filler, lower limiting board and four pipe joints etc.A purge hole respectively left by the pipe joint of coal gas heat exchange of heat pipe heat release zone, both sides.
4, device according to claim 2, it is characterized in that said flue gas pipeline system, form by heat absorption district, valve (8) and (8 '), pipeline (9) and (9 '), the air-introduced machine institutes such as (11) of valve (3), pipeline (4) and (4 '), valve (6) and (6 '), heat exchange of heat pipe (7) and (7 ').
5, device according to claim 2, it is characterized in that said combustion air preheating pipe-line system, formed by heat release zone, valve (16), the pipeline (21) of air blast (12), valve (13), pipeline (14), valve (15), heat exchange of heat pipe (7).
6, device according to claim 2 is characterized in that said gas preheating pipe-line system, is the heat release zone by pipeline (22), valve (23), heat exchange of heat pipe (7 '), and valve (24), pipeline (25) and (29) are formed.
7, device according to claim 2; it is characterized in that said steam blowing pipe-line system, is by pipeline (32), compositions such as valve (33), (34), (35), (36), (37); when shutting down maintenance, coal gas is given the pipe line system purge.
8, device according to claim 2; it is characterized in that said safety monitoring system; be by automatic regulating valve door (1), (8), (8 '); air-introduced machine (11) is set up control valve; temperature instrumentation (10), (17), (26), pressure instrumentation (5), (5 '), (27), instrument board (38) is formed; air-introduced machine (11), heat exchange of heat pipe (7) and (7 ') are carried out temperature protection, flue gas flow is controlled.
9, device according to claim 2 is characterized in that said heat exchange of heat pipe input and withdraws from the switched system of use.Coal gas heat exchange of heat pipe (7 ') drops into and withdraws from and uses is that keying by valve (23) and valve (28) realizes.It is that keying by valve (15) and valve (19) realizes that the input of combustion air heat exchange of heat pipe and withdrawing from is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108099 CN85108099A (en) | 1985-11-03 | 1985-11-03 | The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108099 CN85108099A (en) | 1985-11-03 | 1985-11-03 | The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85108099A true CN85108099A (en) | 1987-05-13 |
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ID=4795901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85108099 Pending CN85108099A (en) | 1985-11-03 | 1985-11-03 | The method and apparatus that the blast-furnace hot-air furnace flue gas exhaust heat utilizes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85108099A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995012091A1 (en) * | 1993-10-25 | 1995-05-04 | Liu, Wenwu | Pre-mixing combustion method and burner |
| CN1076636C (en) * | 1999-12-29 | 2001-12-26 | 宝山钢铁股份有限公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN102072555A (en) * | 2010-11-17 | 2011-05-25 | 山东兴氟新材料有限公司 | Method for recycling remained heat from production of anhydrous hydrogen fluoride and device thereof |
| CN101723363B (en) * | 2010-01-25 | 2011-11-23 | 哈尔滨工业大学 | Pre-furnace preparation method of activated carbon activated by combined flue gas and water vapor |
| CN102538491A (en) * | 2012-01-31 | 2012-07-04 | 首钢总公司 | System and method utilizing flue duct waste gas of hot air furnace to bake and preheat charging of blast furnace |
| CN101634529B (en) * | 2008-07-25 | 2012-09-05 | 上海雷林工程技术有限公司 | Preheating system of plate heat exchanger of hot blast furnace |
| CN108590780A (en) * | 2018-05-23 | 2018-09-28 | 湖北新冶钢特种钢管有限公司 | A kind of TRT units Import Gas pre-heating system and its application method |
-
1985
- 1985-11-03 CN CN 85108099 patent/CN85108099A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995012091A1 (en) * | 1993-10-25 | 1995-05-04 | Liu, Wenwu | Pre-mixing combustion method and burner |
| CN1076636C (en) * | 1999-12-29 | 2001-12-26 | 宝山钢铁股份有限公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN101634529B (en) * | 2008-07-25 | 2012-09-05 | 上海雷林工程技术有限公司 | Preheating system of plate heat exchanger of hot blast furnace |
| CN101723363B (en) * | 2010-01-25 | 2011-11-23 | 哈尔滨工业大学 | Pre-furnace preparation method of activated carbon activated by combined flue gas and water vapor |
| CN102072555A (en) * | 2010-11-17 | 2011-05-25 | 山东兴氟新材料有限公司 | Method for recycling remained heat from production of anhydrous hydrogen fluoride and device thereof |
| CN102538491A (en) * | 2012-01-31 | 2012-07-04 | 首钢总公司 | System and method utilizing flue duct waste gas of hot air furnace to bake and preheat charging of blast furnace |
| CN102538491B (en) * | 2012-01-31 | 2013-10-30 | 首钢总公司 | System and method utilizing flue duct waste gas of hot air furnace to bake and preheat charging of blast furnace |
| CN108590780A (en) * | 2018-05-23 | 2018-09-28 | 湖北新冶钢特种钢管有限公司 | A kind of TRT units Import Gas pre-heating system and its application method |
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