CN202250271U - Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for ferroalloy furnace - Google Patents
Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for ferroalloy furnace Download PDFInfo
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- CN202250271U CN202250271U CN2011203952516U CN201120395251U CN202250271U CN 202250271 U CN202250271 U CN 202250271U CN 2011203952516 U CN2011203952516 U CN 2011203952516U CN 201120395251 U CN201120395251 U CN 201120395251U CN 202250271 U CN202250271 U CN 202250271U
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Abstract
Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for a ferroalloy furnace comprises a water-cooling flue duct, a combustion settling chamber, a heat accumulating and temperature equalizing device, a waste heat collecting chamber, a dust remover, a main air blower and an exhaust pipe, and is characterized in that the combustion settling chamber is sequentially connected with the heat accumulating and temperature equalizing device, the waste heat collecting chamber, the dust remover, the main air blower and the exhaust pipe through a pipeline. A heat pipe heat exchanger is mounted in the waste heat collecting chamber; the cold water inlet of the heat pipe heat exchanger is connected with a water pump; the hot water outlet of the heat pipe heat exchanger is sequentially connected with a high-pressure stage evaporator, a medium-pressure stage evaporator and a low-pressure stage evaporator; one ends of the evaporators are connected with working medium pressure pumps; the other ends of the evaporators are connected with an organic turbine with vapor supplement ports; one end of the organic turbine with the vapor supplement ports is connected with a condenser; the other end of the organic turbine with the vapor supplement ports is connected with a generator; and R236ea is adopted as a cycle organic working medium. The equipment has the function of peak shifting, can reduce the amplitude of temperature fluctuation, and also can recover the heat energy in flue gas and convert the heat energy into high-grade electric energy to the utmost extent, so as to achieve a good environmental protection effect.
Description
Technical field
The utility model relates to multistage organic Rankine circulation cogeneration of ferro-alloy furnace flue gas heat accumulating type and dedusting technology field.
Background technique
The annual mass energy that consumes of Iron And Steel Industry, the high-temperature flue gas and the equipment cooling that produce in the smelting process have been taken away significant amount of energy.Because ferro-alloy furnace steel-making flue-gas temperature is very high, generally about 950 ℃, dust concentration reaches 22g/Nm to the temperature of entering pipeline after capturing
3, accounting for more than 72% of dust total amount less than the ash of 6um, Dust Capacity is big, and sticking and thin.And the flue-gas temperature big ups and downs, dust loading is big, and ordinary water tubulation exhaust heat boiler is difficult to apply to the heat recovery of ferro-alloy furnace flue gas.At present; Heat pipe heat exchanger has successfully applied in the flue gas waste heat recovery of ferro-alloy furnace; But, make the heat pipe waste heat recovering device also face a lot of problems at steel industry universal because the intrinsic defect of heat pipe (cost is high, not freeze proof, non-refractory, service life short).
Owing to contain amounts of dust in the flue gas; Dust stratification, blocking phenomenon appear in sticking and thin dust on heat-exchanging element, not only influence heat exchange efficiency, cause the exhaust heat boiler steam producing amount not enough; Even more serious is because the stifled ash of exhaust heat boiler; System's fluctuation of service causes to smelt to produce and can't normally carry out the maintenance of being forced to stop production.
Simultaneously, because the fluctuation of ferro-alloy furnace flue-gas temperature is violent, wave amplitude is big, and waste heat recovering device 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 recovering device.The economic value that this has just reduced waste heat recovering device has relatively increased the investment of waste heat recovering device.
Summary of the invention
The utility model is to the problem that exists in the existing technology; A kind of multistage organic Rankine circulation device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device that can effectively reduce ferro-alloy furnace flue-gas temperature fluctuating range is provided; The heat energy that this device can not only reclaim in the flue gas to greatest extent is converted into the HQ high grade electric energy, drags dedusting fan, can reduce the exhaust temperature of flue gas simultaneously; Obtain good environment protection effect, dust emission concentration 6mg/Nm
3
The utility model solves the technological scheme that its technical problem adopted: the multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type cogeneration special device; Comprise that water-cooled flue, combustion settling chamber, heat-accumulating and temperature-equalizing device, waste heat gather chamber, deduster, main air blower, exhaust pipe; It is characterized in that: said combustion settling chamber gathers chamber, deduster, main air blower, exhaust pipe through be linked in sequence heat-accumulating and temperature-equalizing device, waste heat of pipeline; Said heat-accumulating and temperature-equalizing device comprises flue gas inlet, carbon carbon composite heat retainer, ash removal equipment for flapping, smoke outlet and ash bucket; Said carbon carbon composite heat retainer is arranged between flue gas inlet and the smoke outlet, and said ash removal equipment for flapping segmentation is arranged between the heat retainer.Said waste heat gathers the indoor uniform flow heat pipe heat exchanger that is equipped with; The cooling water inlet of uniform flow heat pipe heat exchanger is connected with the heat exchanger feed water pump; The hot water outlet of uniform flow heat pipe heat exchanger connects the hot water inlet of high pressure stage vaporizer; The cooling water outlet of high pressure stage vaporizer connects the hot water inlet of medium pressure grade vaporizer, and the cooling water outlet of medium pressure grade vaporizer connects the hot water inlet of low pressure stage vaporizer, and the cooling water outlet of low pressure stage vaporizer connects circulating water pool; Circulating water pool is connected with the heat exchanger feed water pump, constitutes a loop.The working medium entrance point of low pressure stage vaporizer is connected with the high-pressure outlet end of low pressure stage working medium compression pump; The sender property outlet end one tunnel of low pressure stage vaporizer 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 compression pump, and the outlet end of medium pressure grade working medium compression pump connects the medium pressure grade vaporizer, and the sender property outlet end one tunnel of medium pressure grade vaporizer 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 high pressure stage working medium compression pump; The outlet end of high pressure stage working medium compression pump connects the high pressure stage vaporizer, and the sender property outlet end of high pressure stage vaporizer is connected with the high-pressure admission cylinder of the organic turbine of band filling mouth behind pipeline, and the bottom interface of the organic turbine of band filling mouth is connected with the suction port of condenser through pipeline; The liquid phase outlet of condenser is connected with the low pressure inlet end of low pressure stage working medium compression pump through pipeline; The organic turbine of band filling mouth is connected with three phase generator, and an end flange interface of condenser is connected with circulating water pump, and another end of condenser connects cooling tower; Cooling tower is connected with circulating water pump, constitutes a loop.
It is further characterized in that: adopting R236ea is the circulation organic working medium.
The beneficial effect of the utility model is: because the fluctuation of ferro-alloy furnace flue-gas temperature is violent; The flue-gas temperature peak value is high; After flue gas was handled through the heat-accumulating and temperature-equalizing device of the utility model, the flue-gas temperature fluctuating range can greatly reduce, and has also reduced the peak value of flue-gas temperature simultaneously.Flue gas through the heat-accumulating and temperature-equalizing device advances the uniform flow heat pipe heat exchanger, because the flue-gas temperature peak value reduces, the device for generating power by waste heat investment is reduced; The flue-gas temperature fluctuating range reduces, and then helps improving the stability of device for generating power by waste heat, increases the service life.
This power generating equipment and single-stage singly are pressed with the maximum difference of machine Rankine cycle and are; This power generating equipment adopts the measure of multistage evaporation in the high, medium and low vaporizer of organic working medium; Utilize low-temperature zone (90 ℃ of the imports of hot water; Export 60 ℃) heating working medium generation low pressure working fluid steam, the low pressure filling mouth that gets into organic turbine expands and does work; Utilize middle-temperature section (120 ℃ of imports the export 90 ℃) heating working medium of hot water to press working substance steam in producing, the middle pressure filling mouth that the gets into organic turbine acting of expanding; Utilize high temperature section (150 ℃ of imports the export 120 ℃) heating working medium of saturated vapor to produce high-pressure working medium steam, get into the high pressure cylinder expansion acting of organic turbine; Realize the step dividing potential drop heating of residual heat stream to 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 exhaust temperature of flue gas can on the basis of single-stage evaporation organic Rankine thermal efficiency of cycle, improve 10～20%, reduce the exhaust temperature of flue gas, owing to can maintain 100 ℃; Filtrate in the sack cleaner can be selected cheapest terylene Nomex cloth bag for use, has reduced investment and operating cost; Effluent concentration is low, can guarantee to discharge dust concentration at 6mg/Nm
3
The advantage of the utility model is:
1. can alleviate the rapid drawdown that rises sharply of flue-gas temperature;
2. solve the problem of expanding with heat and contract with cold;
3. uniform flow heat pipe heat exchanger dust stratification does not stop up;
4. prolong the working life of equipment;
5. improve device for generating power by waste heat efficient 10～20%;
6. reduce the device for generating power by waste heat investment;
7. can reduce and sneak into cold blast rate, practice thrift the dedusting energy consumption.
Description of drawings
Fig. 1 is the apparatus structure schematic representation of the utility model.
Among Fig. 1: 1. ferro-alloy furnace, 2. water-cooled flue, 3. combustion settling chamber, 4. heat-accumulating and temperature-equalizing device, 5. flue gas inlet, 6. carbon carbon composite heat retainer, 7. ash bucket; 8. ash removal equipment for flapping, 9. smoke outlet, 10. waste heat gathers the chamber, 11. uniform flow heat pipe heat exchanger, 12. dedusters; 13. main air blower, 14. exhaust pipes, 15. heat exchanger feed water pumps, 16. circulating water pools, 17. low pressure stage vaporizers; 18. the medium pressure grade vaporizer, 19. high pressure stage vaporizers, 20. low pressure stage working medium compression pumps, 21. medium pressure grade working medium compression pumps, 22. high pressure stage working medium compression pumps; 23. the organic turbine of band filling mouth, 24. three phase generators, 25. circulating water pump, 26. condensers, 27. cooling towers.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
The multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type cogeneration special device comprises that water-cooled flue 2, combustion settling chamber 3, heat-accumulating and temperature-equalizing device 4, waste heat gather chamber 10, deduster 12, main air blower 13, exhaust pipe 14 in the utility model; It is characterized in that: said combustion settling chamber 3 gathers chamber 10, deduster 12, main air blower 13, exhaust pipe 14 through be linked in sequence heat-accumulating and temperature-equalizing device 4, waste heat of pipeline; Said heat-accumulating and temperature-equalizing device 4 comprises flue gas inlet 5, carbon carbon composite heat retainer 6, ash removal equipment for flapping 8, smoke outlet 9 and ash bucket 7; Said carbon carbon composite heat retainer 6 is arranged between flue gas inlet 5 and the smoke outlet 9, and said ash removal equipment for flapping 8 segmentations are arranged between the carbon carbon composite heat retainer 6.Said waste heat gathers uniform flow heat pipe heat exchanger 11 is installed in the chamber 10; The cooling water inlet of uniform flow heat pipe heat exchanger 11 is connected with heat exchanger feed water pump 15; The hot water outlet of uniform flow heat pipe heat exchanger 11 connects the hot water inlet of high pressure stage vaporizer 19; The cooling water outlet of high pressure stage vaporizer 19 connects the hot water inlet of medium pressure grade vaporizer 18, and the cooling water outlet of medium pressure grade vaporizer 18 connects the hot water inlet of low pressure stage vaporizer 17, and the cooling water outlet of low pressure stage vaporizer 17 connects circulating water pool 16; Circulating water pool 16 is connected with heat exchanger feed water pump 15, constitutes a loop.The working medium entrance point of low pressure stage vaporizer 17 is connected with the high-pressure outlet end of low pressure stage working medium compression pump 20; The sender property outlet end one tunnel of low pressure stage vaporizer 17 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 compression pump 21; The outlet end of medium pressure grade working medium compression pump 21 connects medium pressure grade vaporizer 18; The sender property outlet end one tunnel of medium pressure grade vaporizer 18 is connected with the middle pressure filling mouth of the organic turbine 23 of band filling mouth behind pipeline, and another road is connected with the entrance point of high pressure stage working medium compression pump 22, and the outlet end of high pressure stage working medium compression pump 22 connects high pressure stage vaporizer 19; The sender property outlet end of high pressure stage vaporizer 19 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 with the suction port of condenser 26 through pipeline, and the liquid phase outlet of condenser 26 is connected with the low pressure inlet end of low pressure stage working medium compression pump 20 through pipeline, and the organic turbine 23 of band filling mouth is connected with three phase generator 24; An end flange interface of condenser 26 is connected with circulating water pump 25; Another end of condenser 26 connects cooling tower 27, and cooling tower 27 is connected with circulating water pump 25, constitutes a loop.
Said low boiling organic working medium is R236ea, three grades of evaporations, and the low pressure stage evaporating pressure is 0.618MPa; The medium pressure grade evaporating pressure is 0.875MPa; The high pressure stage evaporating pressure is 1.735MPa, and when the power pressure after the acting of expanding was 0.215MPa, system's electromotive power output was 2500KW; Rankine cycle efficient is 23%, and the flue-gas temperature that system discharges is 100 ℃.
The working procedure of the utility model: 30000KVA ferro-alloy furnace 1 flue gas flow 20 * 10
4Nm
3/ h, 950 ℃ of temperature, dust concentration 22g/Nm
3By discharging in the stove, sneak into cold wind through water-cooled flue 2, get into 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, 620 ℃ of the flue-gas temperatures of adjusting control setting chamber, the flue gas that is come out by combustion settling chamber 3 gets into heat-accumulating and temperature-equalizing device 4; After the heat-accumulating and temperature-equalizing effect through 6 pairs of high-temperature flue gas of carbon carbon composite heat retainer in the heat-accumulating and temperature-equalizing device 4, flue gas gets into waste heat and gathers in the chamber 10, and high-temperature flue gas is emitted heat; Accomplish heat exchange; Temperature is reduced to 100 ℃, gets into deduster 12, dust concentration 6mg/Nm after dedusting
3Be pressed into exhaust pipe 14 by main air blower 13 and enter atmosphere.Simultaneously, circulating water drives through heat exchanger feed water pump 15, gets into to be installed on the heat that waste heat gathers absorption flue gas in the uniform flow heat pipe heat exchanger 11 in the chamber 10; Form steam water interface (150 ℃ of temperature), steam water interface gets in the high pressure stage vaporizer 19 under the natural circulation force urges and emits heat, and temperature is reduced to 120 ℃; Get into then in the medium pressure grade vaporizer 18 and emit heat, temperature is reduced to 90 ℃, gets in the low pressure stage vaporizer 17 again and emits heat; Temperature is reduced to 60 ℃; Become low temperature water, low temperature water flows into circulating water pool 16, the circulation of a beginning new round.
Simultaneously,,, in low pressure stage vaporizer 17, absorb the heat of waste heat carrier earlier, become the low pressure stage working substance steam through the driving of low pressure stage working medium compression pump 20 through the organic working medium liquid of condensation; One tunnel low pressure filling mouth through the organic turbine 23 of pipeline entering band filling mouth, another road gets into the heat that absorbs the waste heat carrier in the medium pressure grade vaporizer 18 after 21 pressurizations of medium pressure grade working medium compression pump, become the medium pressure grade working substance steam; One tunnel middle pressure filling mouth through the organic turbine 23 of pipeline entering band filling mouth, another road gets into the heat that absorbs the waste heat carrier in the high pressure stage vaporizer 19 after 22 pressurizations of high pressure stage working medium compression pump, become the high pressure stage working substance steam; Get into the high-pressure admission cylinder of the organic turbine 23 of band filling mouth through pipeline, the working substance steam acting of multistage organic turbine 23 in, expanding, and drive three phase generator 24 generates electricity.The working substance steam of discharging from the organic turbine 23 of band filling mouth is condensed into saturated liquids by condenser 26, sends in the low pressure stage vaporizer 17 circulation of a beginning new round after by low pressure stage working medium compression pump 20 worker quality liquid being pressurizeed again.The circulating water of coming from cooling tower 27 drives through circulating water pump 25, gets in the condenser 26 to absorb heat, under the natural circulation force urges, gets in the cooling tower 27, emits heat, becomes low temperature water, the circulation of a beginning new round.The electric energy that system sends is a threephase AC, and voltage rating is 380V, incorporates electrical network in the factory into after can passing through pressure regulation, or directly gives consumer and use.
Because heat-accumulating and temperature-equalizing device 4 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 ferro-alloy furnace flue gas.With cogeneration of 30000KVA ferro-alloy furnace and dust collecting process is example, and the utility model device and conventional equipment are relatively explained 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 HQ high grade electric energy, can also reach good environment protection effect.
Claims (4)
1. the multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type cogeneration special device; Comprise that water-cooled flue, combustion settling chamber, heat-accumulating and temperature-equalizing device, waste heat gather chamber, deduster, main air blower, exhaust pipe, is characterized in that: said combustion settling chamber gathers chamber, deduster, main air blower, exhaust pipe through be linked in sequence heat-accumulating and temperature-equalizing device, waste heat of pipeline.
2. the multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type according to claim 1 cogeneration special device; It is characterized in that: said heat-accumulating and temperature-equalizing device comprises flue gas inlet, carbon carbon composite heat retainer, ash removal equipment for flapping, smoke outlet and ash bucket; Said carbon carbon composite heat retainer is arranged between flue gas inlet and the smoke outlet, and said ash removal equipment for flapping segmentation is arranged between the carbon carbon composite heat retainer.
3. the multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type according to claim 1 cogeneration special device; It is characterized in that: said waste heat gathers the indoor uniform flow heat pipe heat exchanger that is equipped with; The cooling water inlet of uniform flow heat pipe heat exchanger is connected with the heat exchanger feed water pump, and the hot water outlet of uniform flow heat pipe heat exchanger connects the hot water inlet of high pressure stage vaporizer, and the cooling water outlet of high pressure stage vaporizer connects the hot water inlet of medium pressure grade vaporizer; The cooling water outlet of medium pressure grade vaporizer connects the hot water inlet of low pressure stage vaporizer; The cooling water outlet of low pressure stage vaporizer connects circulating water pool, and circulating water pool is connected with the heat exchanger feed water pump, constitutes a loop.The working medium entrance point of low pressure stage vaporizer is connected with the high-pressure outlet end of low pressure stage working medium compression pump; The sender property outlet end one tunnel of low pressure stage vaporizer 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 compression pump, and the outlet end of medium pressure grade working medium compression pump connects the medium pressure grade vaporizer, and the sender property outlet end one tunnel of medium pressure grade vaporizer 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 high pressure stage working medium compression pump; The outlet end of high pressure stage working medium compression pump connects the high pressure stage vaporizer, and the sender property outlet end of high pressure stage vaporizer is connected with the high-pressure admission cylinder of the organic turbine of band filling mouth behind pipeline, and the bottom interface of the organic turbine of band filling mouth is connected with the suction port of condenser through pipeline; The liquid phase outlet of condenser is connected with the low pressure inlet end of low pressure stage working medium compression pump through pipeline; The organic turbine of band filling mouth is connected with three phase generator, and an end flange interface of condenser is connected with circulating water pump, and another end of condenser connects cooling tower; Cooling tower is connected with circulating water pump, constitutes a loop.
4. the multistage organic Rankine circulation of ferro-alloy furnace flue gas heat accumulating type according to claim 3 cogeneration special device is characterized in that: adopting R236ea is the circulation organic working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203952516U CN202250271U (en) | 2011-10-11 | 2011-10-11 | Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for ferroalloy furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203952516U CN202250271U (en) | 2011-10-11 | 2011-10-11 | Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for ferroalloy furnace |
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| Publication Number | Publication Date |
|---|---|
| CN202250271U true CN202250271U (en) | 2012-05-30 |
Family
ID=46111529
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203952516U Expired - Fee Related CN202250271U (en) | 2011-10-11 | 2011-10-11 | Flue gas heat accumulating type multi-stage organic Rankine cycle waste heat generating special equipment for ferroalloy furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250271U (en) |
-
2011
- 2011-10-11 CN CN2011203952516U patent/CN202250271U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141011 |
|
| EXPY | Termination of patent right or utility model |