CN203116543U - Flue gas waste heat power generation special-purpose device for semi-sealed electric furnace - Google Patents
Flue gas waste heat power generation special-purpose device for semi-sealed electric furnace Download PDFInfo
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- CN203116543U CN203116543U CN201320173479XU CN201320173479U CN203116543U CN 203116543 U CN203116543 U CN 203116543U CN 201320173479X U CN201320173479X U CN 201320173479XU CN 201320173479 U CN201320173479 U CN 201320173479U CN 203116543 U CN203116543 U CN 203116543U
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Abstract
A flue gas waste heat power generation special-purpose device for a semi-sealed electric furnace comprises a combustion settling chamber, a heat accumulation temperature equalizer, a flow equalization heat accumulation chamber, a booster fan, a dust remover, a main fan and an exhaust funnel. The device is characterized in that the combustion settling chamber is sequentially connected with the heat accumulation temperature equalizer, the flow equalization heat accumulation chamber, the booster fan, the dust remover, the main fan and the exhaust funnel via pipelines; the flow equalization heat accumulation chamber is internally equipped with a low pressure stage evaporator, an intermediate pressure stage evaporator and a high pressure stage evaporator; one ends of the evaporators are connected with working medium booster pumps while the other ends are connected with an organic turbine with an air supplement port; one end of the organic turbine with the air supplement port is connected with a condenser while the other end is connected with a generator; and the exit of the condenser is connected with a lithium-bromide absorption-type refrigerating machine. The device is further characterized in that R600a is used as the circulating organic working medium. By using the special-purpose device, heat energy in the flue gas can be recovered to the maximum degree and directly converted into high-quality electric energy, the efficiency is improved by 30%-35% when compared with that of the single-stage evaporation organic Rankine cycle, and an excellent environmental protection effect can be achieved.
Description
Technical field
The utility model relates to a kind of waste heat power generation equipment, and particularly semi-hermetic electric furnace flue gas cogeneration special equipment belongs to flue gas ash removal and cogeneration technology field.
Background technology
The purifier of semi-hermetic electric furnace flue gas is that semi-hermetic electric furnace flue gas generation equipment, UTILIZATION OF VESIDUAL HEAT IN facility, deduster connect successively by pipeline in the prior art.
The present UTILIZATION OF VESIDUAL HEAT IN facility that adopts usually: water row tube waste heat boiler, heat pipe-type waste-heat recovery device reclaim the waste heat of semi-hermetic electric furnace flue gas, produce saturated vapor etc.Because the big ups and downs of semi-hermetic electric furnace flue gas temperature, dustiness is big, and light water tubulation waste heat boiler is difficult to apply to the waste heat recovery of semi-hermetic electric furnace flue gas.At present, the heat pipe-type waste-heat recovery device has successfully applied in the waste heat recovery of semi-hermetic electric furnace flue gas, but because the inherent shortcoming of heat pipe (cost height, not freeze proof, non-refractory, service life are short), make popularize also the face a lot of problems of heat pipe waste-heat recovery device at steel industry.
Simultaneously, because the temperature fluctuation of semi-hermetic electric furnace flue gas is violent, wave amplitude is big, and the waste heat system just must design enough greatly, guarantees that high-temperature flue gas also can effectively cool off.But actual steam output the situation of low load with strong power occurs far below the evaporation capacity of waste heat system.The economic worth that this has just reduced the waste heat system has relatively increased the investment of waste heat system.
Summary of the invention
At the problems referred to above, the utility model provides semi-hermetic electric furnace flue gas cogeneration special equipment, it is the cooling down high-temperature flue gas efficiently, the heat energy that can also reclaim to greatest extent in the flue gas is converted into the high-grade electric energy, drag dedusting fan, can reduce simultaneously the exhaust temperature of flue gas, improve dust collection capacity, and not influence the stable and continuous of semi-hermetic electric furnace steel making production.
The technical scheme that its technical problem that solves the utility model adopts is: semi-hermetic electric furnace flue gas cogeneration special equipment, comprise combustion settling chamber, the heat-accumulating and temperature-equalizing device, the current-sharing regenerator, booster fan, deduster, main air blower, aiutage, it is characterized in that: described combustion settling chamber is by the pipeline heat-accumulating and temperature-equalizing device that is linked in sequence, the current-sharing regenerator, booster fan, deduster, main air blower, aiutage, described heat-accumulating and temperature-equalizing device comprises gas approach, the composite carbon-copper material heat storage, sound wave ash cleaner, exhanst gas outlet and ash bucket, described composite carbon-copper material heat storage is arranged between gas approach and the exhanst gas outlet, described sound wave ash cleaner segmentation is arranged between the composite carbon-copper material heat storage, in the described current-sharing regenerator low-pressure stage evaporimeter is installed, the medium pressure grade evaporimeter, the hiigh pressure stage evaporimeter, the entrance point of low-pressure stage evaporimeter is connected with the high-pressure outlet end of low-pressure stage working medium force (forcing) pump, the port of export one tunnel of low-pressure stage evaporimeter is connected with the low pressure filling mouth of the organic turbine of band filling mouth behind pipeline, another road is connected with the entrance point of medium pressure grade working medium force (forcing) pump, the port of export of medium pressure grade working medium force (forcing) pump connects the medium pressure grade evaporimeter, the port of export one tunnel of medium pressure grade evaporimeter is connected with the middle pressure filling mouth of the organic turbine of band filling mouth behind pipeline, another road is connected with the entrance point of hiigh pressure stage working medium force (forcing) pump, the port of export of hiigh pressure stage working medium force (forcing) pump connects the hiigh pressure stage evaporimeter, the port of export of hiigh pressure stage evaporimeter is connected with the high-pressure admission cylinder of the organic turbine of band filling mouth behind pipeline, the bottom interface of the organic turbine of band filling mouth is connected with the air inlet of shell-and-tube cooler by pipeline, the liquid phase outlet of shell-and-tube cooler is connected with fluid reservoir by pipeline, fluid reservoir is connected with the low pressure inlet end of low-pressure stage working medium force (forcing) pump, the organic turbine of band filling mouth is connected with threephase generator, an end flange interface of shell-and-tube cooler is connected with water circulating pump, another end of shell-and-tube cooler connects lithium-bromide absorption-type refrigerating machine, lithium-bromide absorption-type refrigerating machine is connected with water circulating pump, constitute another loop, described booster fan is connected deduster in the lump with the outer discharge pipe that is connected semi-hermetic electric furnace top, deduster connects main air blower by pipeline, and main air blower is connected with aiutage.
It is further characterized in that: adopting R600a is the circulation organic working medium.
In the said structure of the present utility model, the combination of equipment such as device for generating power by waste heat place of water tubulation waste heat boiler, heat pipe-type waste-heat recovery device, both simplified system configuration, the heat energy that can reclaim to greatest extent in the flue gas is converted into the high-grade electric energy again, drag dedusting fan, can reduce simultaneously the exhaust temperature of flue gas, improve dust collection capacity, reach the purpose that energy-conserving and environment-protective are produced.
The beneficial effects of the utility model are: because the heat-accumulating and temperature-equalizing device can be to the flue-gas temperature peak load shifting, reduce flue gas maximum temperature, reduce the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, thereby can reduce the investment of device for generating power by waste heat, improve the stability of device for generating power by waste heat, and can dispose all kinds of waste heat power generation equipments safely.
The difference that this generating equipment and single-stage singly are pressed with machine Rankine cycle maximum is, this equipment adopts the measure of multistage evaporation, utilize the low-temperature zone heating of semi-hermetic electric furnace flue gas waste heat to produce low-pressure steam, the low pressure filling mouth that enters organic turbine expands and does work, utilize the middle-temperature section heating of semi-hermetic electric furnace flue gas waste heat to produce middle pressure steam, the middle pressure filling mouth that enters organic turbine expands and does work, utilize the high temperature section heating of semi-hermetic electric furnace flue gas waste heat to produce high steam, enter the high pressure cylinder expansion acting of organic turbine, realize that semi-hermetic electric furnace flue gas waste heat is to the step dividing potential drop heating of organic working medium, so just in heating surfaces at different levels, reduced the lack of uniformity of the heat transfer temperature difference between residual heat stream and working medium, reduced because the entropy that the different transfer of heat irreversible loss brings increases, the comparable single-stage evaporation organic Rankine circulation of its thermal efficiency improves 30～35%, reduced the exhaust temperature of flue gas, because the exhaust temperature of flue gas can maintain 80 ℃, filtrate in the sack cleaner can be selected cheapest terylene Nomex cloth bag for use, has reduced investment and operating cost; Concentration of emission is low, can guarantee to discharge dust concentration at 10mg/Nm
3’
Advantage of the present utility model is:
1. the heat-accumulating and temperature-equalizing device can be to the flue-gas temperature peak load shifting, reduce flue gas maximum temperature, reduce the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, solve the problem of expanding with heat and contract with cold;
2. adopt multistage evaporation organic Rankine circulation cogeneration to reclaim the waste heat of electric furnace flue gas, the comparable single-stage evaporation organic Rankine circulation of its thermal efficiency improves 30～35%;
3. by the lithium-bromide absorption-type refrigerating machine cooling, the temperature of cooling water is down to 10～15 ℃, satisfies working substance steam and is condensed into saturated liquid to the requirement of cooling water;
4. the working medium fluid reservoir can guarantee that working medium circulating pump pressurizes continuously;
5. improve device for generating power by waste heat efficient;
6. reduce the device for generating power by waste heat investment;
7. operation energy consumption is low, good purification.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among Fig. 1: 1. semi-hermetic electric furnace, 2. water-cooled sliding sleeve, 3. combustion settling chamber, 4. outer discharge pipe, 5. heat-accumulating and temperature-equalizing device, 6. gas approach, 7. composite carbon-copper material heat storage, 8. ash bucket, 9. sound wave ash cleaner, 10. exhanst gas outlet, 11. current-sharing regenerator, 12. hiigh pressure stage evaporimeters, 13. the medium pressure grade evaporimeter, 14. low-pressure stage evaporimeters, 15. booster fans, 16. deduster, 17. main air blowers, 18. aiutages, 19. low-pressure stage working medium force (forcing) pump, 20. medium pressure grade working medium force (forcing) pumps, 21. hiigh pressure stage working medium force (forcing) pumps, 22. fluid reservoir, 23, the organic turbine of band filling mouth, 24. threephase generator, 25. water circulating pump, 26. shell-and-tube coolers, 27. lithium-bromide absorption-type refrigerating machines.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Semi-hermetic electric furnace flue gas cogeneration special equipment in the utility model, comprise combustion settling chamber 3, heat-accumulating and temperature-equalizing device 5, current-sharing regenerator 11, booster fan 15, deduster 16, main air blower 17, aiutage 18, it is characterized in that: described combustion settling chamber 3 is by the pipeline heat-accumulating and temperature-equalizing device 5 that is linked in sequence, current-sharing regenerator 11, booster fan 15, deduster 16, main air blower 17, aiutage 18, described heat-accumulating and temperature-equalizing device 5 comprises gas approach 6, composite carbon-copper material heat storage 7, sound wave ash cleaner 9, exhanst gas outlet 10 and ash bucket 8, described composite carbon-copper material heat storage 7 is arranged between gas approach 6 and the exhanst gas outlet 10, described sound wave ash cleaner 9 segmentations are arranged between the composite carbon-copper material heat storage 7, in the described current-sharing regenerator 11 low-pressure stage evaporimeter 14 is installed, medium pressure grade evaporimeter 15, hiigh pressure stage evaporimeter 16, the entrance point of low-pressure stage evaporimeter 14 is connected with the high-pressure outlet end of low-pressure stage working medium force (forcing) pump 19, the port of export one tunnel of low-pressure stage evaporimeter 14 is connected with the low pressure filling mouth of the organic turbine 23 of band filling mouth behind pipeline, another road is connected with the entrance point of medium pressure grade working medium force (forcing) pump 20, the port of export of medium pressure grade working medium force (forcing) pump 20 connects medium pressure grade evaporimeter 13, the port of export one tunnel of medium pressure grade evaporimeter 13 is connected with the middle pressure filling mouth of the organic turbine 23 of band filling mouth behind pipeline, another road is connected with the entrance point of hiigh pressure stage working medium force (forcing) pump 21, the port of export of hiigh pressure stage working medium force (forcing) pump 21 connects hiigh pressure stage evaporimeter 12, the port of export of hiigh pressure stage evaporimeter 12 is connected with the high-pressure admission cylinder of the organic turbine 23 of band filling mouth behind pipeline, the bottom interface of the organic turbine 23 of band filling mouth is connected by the air inlet of pipeline with shell-and-tube cooler 26, the liquid phase outlet of shell-and-tube cooler 26 is connected with fluid reservoir 22 by pipeline, fluid reservoir 22 is connected with the low pressure inlet end of low-pressure stage working medium force (forcing) pump 19, the organic turbine 23 of band filling mouth is connected with threephase generator 24, an end flange interface of shell-and-tube cooler 26 is connected with water circulating pump 25, another end of shell-and-tube cooler 26 connects lithium-bromide absorption-type refrigerating machine 27, lithium-bromide absorption-type refrigerating machine 27 is connected with water circulating pump 25, constitute another loop, described booster fan 15 is connected deduster 16 in the lump with the outer discharge pipe 4 that is connected semi-hermetic electric furnace top, deduster 16 connects main air blower 17 by pipeline, and main air blower 17 is connected with aiutage 18.
Described low boiling organic working medium is R600a, three grades of evaporations, the low-pressure stage evaporating pressure is 0.282MPa, the medium pressure grade evaporating pressure is 1.19MPa, the hiigh pressure stage evaporating pressure is 2.18MPa, and when the power pressure after the acting of expanding was 0.36MPa, system's electromotive power output was 2000KW, Rankine cycle efficient is 25.6%, and the flue-gas temperature that system discharges is 80 ℃.
Smoke discharging flow 20 * 10 in the course of work of the present utility model: the 70t/h steel-making semi-hermetic electric furnace 1
4Nm
3/ h, 1000 ℃ of temperature, dust content 25g/Nm
3Discharged by the 4th hole, sneak into cold wind through water-cooled sliding sleeve 2, enter combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind, finally burn CO gas, flue gas through combustion settling chamber 3 enters heat-accumulating and temperature-equalizing device 5, described heat-accumulating and temperature-equalizing device 5 comprises gas approach 6, composite carbon-copper material heat storage 7, sound wave ash cleaner 9, exhanst gas outlet 10 and ash bucket 8, described composite carbon-copper material heat storage 7 is arranged between gas approach 6 and the exhanst gas outlet 10, described sound wave ash cleaner 9 segmentations are arranged between the composite carbon-copper material heat storage 7, after the heat-accumulating and temperature-equalizing effect by 7 pairs of high-temperature flue gas of composite carbon-copper material heat storage in the heat-accumulating and temperature-equalizing device 5, flue gas enters in the current-sharing regenerator 11, high-temperature flue gas is emitted heat, temperature is down to 80 ℃, flue gas through cooling is mixed by the flue gas that booster fan 15 comes out with the outer discharge pipe 4 that is connected semi-hermetic electric furnace 1 top comes out and enters deduster 16 in the lump, dust concentration 10mg/Nm after dedusting
3Be pressed into aiutage 18 by main air blower 17 and enter atmosphere, simultaneously, organic working medium liquid through condensation, driving through low-pressure stage working medium force (forcing) pump 19, absorb the heat of fume afterheat carrier earlier in the low-pressure stage evaporimeter 14 in being installed on current-sharing regenerator 11, become the low-pressure stage working substance steam, one the tunnel enters the low pressure filling mouth of band filling mouth organic turbine 23 through pipeline, another road is after 20 pressurizations of medium pressure grade working medium force (forcing) pump, enter the heat that absorbs the fume afterheat carrier in the medium pressure grade evaporimeter 13, become the medium pressure grade working substance steam, one the tunnel enters the middle pressure filling mouth of band filling mouth organic turbine 23 through pipeline, another road is after 21 pressurizations of hiigh pressure stage working medium force (forcing) pump, enter the heat that absorbs the fume afterheat carrier in the hiigh pressure stage evaporimeter 12, become the hiigh pressure stage working substance steam, enter the high-pressure admission cylinder of the organic turbine 23 of band filling mouth through pipeline, the working substance steam acting of in multistage organic turbine 23, expanding, and drive threephase generator 24 generatings, the electric energy that system sends is three-phase alternating current, rated voltage is 380V, can incorporate electrical network in the factory into through after the pressure regulation, or directly give consumer and use, the working substance steam of discharging from the organic turbine 23 of band filling mouth is condensed into saturated liquid by shell-and-tube cooler 26, enter fluid reservoir 22, fluid reservoir 22 can guarantee that low-pressure stage working medium force (forcing) pump 19 pressurizes continuously, send in the low-pressure stage evaporimeter 14 after by low-pressure stage working medium force (forcing) pump 19 worker quality liquid being pressurizeed again, the circulation of a beginning new round, the recirculated water that comes out from shell-and-tube cooler 26, by lithium-bromide absorption-type refrigerating machine 27 coolings, the temperature of cooling water is down to 10～15 ℃, satisfy working substance steam and be condensed into saturated liquid to the requirement of cooling water, send in the shell-and-tube cooler 26 circulation of a beginning new round through water circulating pump 25.
Because heat-accumulating and temperature-equalizing device 5 can be to the flue-gas temperature peak load shifting, reduce flue gas maximum temperature, reduce the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, thereby can reduce the investment of device for generating power by waste heat, improve the stability of device for generating power by waste heat, and can dispose all kinds of waste heat power generation equipments safely.
The maximum characteristics of this equipment are to adopt multistage evaporation organic Rankine circulation cogeneration to reclaim the waste heat of electric furnace flue gas, the recirculated cooling water that comes out from shell-and-tube cooler by lithium-bromide absorption-type refrigerating machine cooling, the temperature of cooling water is down to 10～15 ℃, satisfies working substance steam and is condensed into saturated liquid to the requirement of cooling water.
Be example with 70t/h steel-making semi-hermetic electric furnace waste heat recovery and dust collecting process, the utility model device and conventional equipment comparison are described as follows:
Annotate: work per year and calculated in 330th.
This shows that the utility model smoke dust discharge concentration is low, plant investment is low, operation energy consumption is low, good purification.
The heat energy that the utility model can reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, and its efficient improves 30～35% than the circulation of single-stage evaporation organic Rankine, can also reach good environment protecting.
Claims (2)
1. semi-hermetic electric furnace flue gas cogeneration special equipment, comprise combustion settling chamber, the heat-accumulating and temperature-equalizing device, the current-sharing regenerator, booster fan, deduster, main air blower, aiutage, it is characterized in that: described combustion settling chamber is by the pipeline heat-accumulating and temperature-equalizing device that is linked in sequence, the current-sharing regenerator, booster fan, deduster, main air blower, aiutage, described heat-accumulating and temperature-equalizing device comprises gas approach, the composite carbon-copper material heat storage, sound wave ash cleaner, exhanst gas outlet and ash bucket, described composite carbon-copper material heat storage is arranged between gas approach and the exhanst gas outlet, described sound wave ash cleaner segmentation is arranged between the composite carbon-copper material heat storage, in the described current-sharing regenerator low-pressure stage evaporimeter is installed, the medium pressure grade evaporimeter, the hiigh pressure stage evaporimeter, the entrance point of low-pressure stage evaporimeter is connected with the high-pressure outlet end of low-pressure stage working medium force (forcing) pump, the port of export one tunnel of low-pressure stage evaporimeter is connected with the low pressure filling mouth of the organic turbine of band filling mouth behind pipeline, another road is connected with the entrance point of medium pressure grade working medium force (forcing) pump, the port of export of medium pressure grade working medium force (forcing) pump connects the medium pressure grade evaporimeter, the port of export one tunnel of medium pressure grade evaporimeter is connected with the middle pressure filling mouth of the organic turbine of band filling mouth behind pipeline, another road is connected with the entrance point of hiigh pressure stage working medium force (forcing) pump, the port of export of hiigh pressure stage working medium force (forcing) pump connects the hiigh pressure stage evaporimeter, the port of export of hiigh pressure stage evaporimeter is connected with the high-pressure admission cylinder of the organic turbine of band filling mouth behind pipeline, the bottom interface of the organic turbine of band filling mouth is connected with the air inlet of shell-and-tube cooler by pipeline, the liquid phase outlet of shell-and-tube cooler is connected with fluid reservoir by pipeline, fluid reservoir is connected with the low pressure inlet end of low-pressure stage working medium force (forcing) pump, the organic turbine of band filling mouth is connected with threephase generator, an end flange interface of shell-and-tube cooler is connected with water circulating pump, another end of shell-and-tube cooler connects lithium-bromide absorption-type refrigerating machine, lithium-bromide absorption-type refrigerating machine is connected with water circulating pump, constitute another loop, described booster fan is connected deduster in the lump with the outer discharge pipe that is connected semi-hermetic electric furnace top, deduster connects main air blower by pipeline, and main air blower is connected with aiutage.
2. semi-hermetic electric furnace flue gas cogeneration special equipment according to claim 1 is characterized in that: adopting R600a is the circulation organic working medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320173479XU CN203116543U (en) | 2013-03-28 | 2013-03-28 | Flue gas waste heat power generation special-purpose device for semi-sealed electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320173479XU CN203116543U (en) | 2013-03-28 | 2013-03-28 | Flue gas waste heat power generation special-purpose device for semi-sealed electric furnace |
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| CN203116543U true CN203116543U (en) | 2013-08-07 |
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| CN201320173479XU Expired - Fee Related CN203116543U (en) | 2013-03-28 | 2013-03-28 | Flue gas waste heat power generation special-purpose device for semi-sealed electric furnace |
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| CN (1) | CN203116543U (en) |
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2013
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200330 Address after: 214181 Xitang village, former Chau Street, Huishan District, Jiangsu, Wuxi Patentee after: Wuxi gengzi Machinery Technology Co.,Ltd. Address before: 214181, No. 99, middle Yu Yan Road, former Chau Street, Wuxi, Jiangsu Patentee before: WUXI DONGYOU ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |