CN202470792U - Metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment - Google Patents
Metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment Download PDFInfo
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- CN202470792U CN202470792U CN2012200931688U CN201220093168U CN202470792U CN 202470792 U CN202470792 U CN 202470792U CN 2012200931688 U CN2012200931688 U CN 2012200931688U CN 201220093168 U CN201220093168 U CN 201220093168U CN 202470792 U CN202470792 U CN 202470792U
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- metallurgical furnace
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- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model discloses metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment. The equipment comprises a combustion settling chamber, a high-temperature equal-flow rate straight pipe plate evaporator, a medium and low-temperature afterheat exchange chamber, a dust-removing device, a main fan and an exhaust cylinder, and is characterized in that the combustion settling chamber is sequentially connected with the high-temperature equal-flow rate straight pipe plate evaporator, the medium and low-temperature afterheat exchange chamber, the dust-removing device, the main fan and the exhaust cylinder through pipes; the high-temperature equal-flow rate straight pipe plate evaporator is connected with a steam pocket through a pipe; the steam pocket is connected with a vapor heat accumulator; a heat exchanger is arranged in the medium and low-temperature afterheat exchange chamber; one end of the heat exchanger is connected with a working medium circulating pump; the other end of the heat exchanger is connected with a steam turbine; one end of the steam turbine is connected with a condenser; and the other end of the steam turbine is connected with a power generator. The equipment is characterized in that an R236EA is adopted as a circulating organic working medium. By the equipment, metallurgical furnace high-temperature flue afterheat step utilization can be realized, the heat energy in flue is recovered to the largest extent and is converted into high-quality electric energy, a good environment-friendly effect can be also achieved, and the device is low in investment and operation energy consumption.
Description
Technical field
The utility model relates to a kind of residual heat using device, and particularly exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas and dust-removing device special belong to flue gas ash removal and UTILIZATION OF VESIDUAL HEAT IN technical field.
Background technology
The annual mass energy that consumes of steel and iron 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 metallurgical furnace steel-making flue-gas temperature is very high, generally about 1050 ℃, dust concentration reaches 15g/Nm to the temperature of entering pipeline after capturing
3, accounting for more than 65% of dust total amount less than the ash of 8um, Dust Capacity is big, and sticking and thin.And the flue-gas temperature big ups and downs, dustiness is big, and light water tubulation waste heat boiler is difficult to apply to the waste heat recovery of metallurgical furnace flue gas.At present; Heat-pipe heat exchanger has successfully applied in the flue gas waste heat recovery of metallurgical furnace; But, make the heat pipe waste-heat recovery device also face a lot of problems at steel industry universal because the inherent shortcoming 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, clogging appear in sticking and thin dust on heat exchange element, not only influence heat exchange efficiency, cause the waste heat boiler steam production not enough; Even more serious is because the stifled ash of waste 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 metallurgical furnace flue gas temperature fluctuation is violent, wave amplitude is big, and waste-heat recovery 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 recovery device.The economic worth that this has just reduced waste-heat recovery device has relatively increased the investment of waste-heat recovery device.
Summary of the invention
The utility model is to the problem that exists in the prior art; A kind of exhaust heat stepped use device that can effectively reduce the metallurgical furnace flue gas temperature is provided, and the heat energy that this device can not only reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, drags dedusting fan; Can reduce simultaneously the exhaust temperature of flue gas; Improve dust collection capacity, obtain good dust removing effects, dust emission concentration 5mg/Nm
3
The technical scheme that the utility model adopted is following: exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas and dust-removing device special; Comprise combustion settling chamber, high temperature uniform flow straight tube plate evaporimeter, middle-low temperature heat switch room, deduster, main air blower, aiutage; It is characterized in that: said combustion settling chamber is through pipeline be linked in sequence high temperature uniform flow straight tube plate evaporimeter, middle-low temperature heat switch room, deduster, main air blower, aiutage; Said high temperature uniform flow straight tube plate evaporimeter connects drum through pipeline, and drum connects steam accumulator through pipeline.Said middle-low temperature heat is equipped with the separation sleeve pipe heat exchanger in the switch room; The entrance point of separation sleeve pipe heat exchanger is connected with the high-pressure outlet end of working medium circulating pump; The port of export of separation sleeve pipe heat exchanger is connected with the upper flange interface of steam turbine behind pipeline; The bottom interface of low boiling working fluid steam turbine is connected with the air inlet of shell-and-tube cooler through pipeline, and the liquid phase outlet of shell-and-tube cooler is connected with the low pressure inlet end of working medium circulating pump through pipeline, and the low boiling working fluid steam turbine is connected with threephase generator; An end flange interface of shell-and-tube cooler is connected with water pump; Another end of shell-and-tube cooler connects cooling tower, and cooling tower is connected with water pump, constitutes a loop.
It is further characterized in that: adopting R236EA is the circulation organic working medium.
Because the metallurgical furnace flue gas temperature fluctuation is violent, the flue-gas temperature peak value is high, after the high temperature uniform flow straight tube plate evaporimeter heat exchange of the utility model of flue gas process; The flue-gas temperature fluctuating range can greatly reduce; Also reduced simultaneously the peak value of flue-gas temperature, flue gas becomes middle low-temperature flue gas by high temperature, gets into the separation sleeve pipe heat exchanger again; Can reclaim the waste heat of low-temperature flue gas in the metallurgical furnace through low boiling working fluid organic Rankine circulation cogeneration, realize the exhaust heat stepped utilization of metallurgical furnace flue gas.
The advantage of the utility model is:
1. adopt high temperature uniform flow straight tube plate evaporimeter to reclaim the waste heat of metallurgical furnace high-temperature flue gas, the waste heat that low-temperature flue gas in the metallurgical furnace is reclaimed in low boiling working fluid organic Rankine circulation cogeneration, realize the exhaust heat stepped utilization of metallurgical furnace flue gas;
2. can alleviate the rapid drawdown that rises sharply of flue-gas temperature, solve the problem of expanding with heat and contract with cold;
3. one-time surface evaporimeter dust stratification does not stop up;
4. prolong the service life of equipment;
5. improve device for generating power by waste heat efficient;
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 sketch map of the utility model.
Among the figure, 1. metallurgical furnace, 2. water-cooled sliding sleeve, 3. combustion settling chamber, 4. high temperature uniform flow straight tube plate evaporimeter; 5. middle-low temperature heat switch room, 6. deduster, 7. main air blower, 8. aiutage, 9. drum; 10. steam accumulator, 11. separation sleeve pipe heat exchangers, 12. low boiling working fluid steam turbines, 13. threephase generators; 14. working medium circulating pump, 15. water pumps, 16. shell-and-tube coolers, 17. cooling towers.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas and dust-removing device special comprise combustion settling chamber 3, high temperature uniform flow straight tube plate evaporimeter 4, middle-low temperature heat switch room 5, deduster 6, main air blower 7, aiutage 8 in the utility model; It is characterized in that: said combustion settling chamber 3 is through pipeline be linked in sequence high temperature uniform flow straight tube plate evaporimeter 4, middle-low temperature heat switch room 5, deduster 6, main air blower 7, aiutage 8; Said high temperature uniform flow straight tube plate evaporimeter 4 connects drum 9 through pipeline, and drum 9 connects steam accumulator 10 through pipeline.In the said middle-low temperature heat switch room 5 separation sleeve pipe heat exchanger 11 is installed; The entrance point of separation sleeve pipe heat exchanger 11 is connected with the high-pressure outlet end of working medium circulating pump 14; The port of export of separation sleeve pipe heat exchanger 11 is connected with the upper flange interface of low boiling working fluid steam turbine 12 behind pipeline; The bottom interface of low boiling working fluid steam turbine 12 is connected with the air inlet of shell-and-tube cooler 16 through pipeline, and the liquid phase outlet of shell-and-tube cooler 16 is connected with the low pressure inlet end of working medium circulating pump 14 through pipeline, and low boiling working fluid steam turbine 12 is connected with threephase generator 13; An end flange interface of shell-and-tube cooler 16 is connected with water pump 15; Another end of shell-and-tube cooler 16 connects cooling tower 17, and cooling tower 17 is connected with water pump 15, constitutes a loop.
Said low boiling working fluid is R236EA; The power pressure that gets into the low boiling working fluid steam turbine is 1.9MPa, and when the power pressure after the acting of expanding was 0.29MPa, system's electromotive power output was 1500KW; Rankine cycle efficient is 20.5%, and the flue-gas temperature that system discharges is 80 ℃.
The course of work of the utility model: 150t/h metallurgical furnace 1 flue gas flow 36 * 10
4Nm
3/ h, 1050 ℃ of temperature, dust content 15g/Nm
3Discharge by the 4th hole, sneak into cold wind, get into combustion settling chamber 3 behind the burning CO gas through water-cooled sliding sleeve 2; 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, the flue gas that is come out by combustion settling chamber 3 gets into high temperature uniform flow straight tube plate evaporimeter 4, and the water in the drum 9 produces steam entering drum 9 after in high temperature uniform flow straight tube plate evaporimeter 4, absorbing the high-temperature flue gas waste heat; Steam in the drum 9 gets into steam accumulator 10 through pipeline, supplies to stablize outward through regulating the back, steam continuous, the parameter The profile is used for generating electricity.After 4 heat exchange of high temperature uniform flow straight tube plate evaporimeter, the flue-gas temperature fluctuating range can greatly reduce, and has also reduced the peak value of flue-gas temperature simultaneously; Flue gas becomes middle low-temperature flue gas by high temperature; Get in the middle-low temperature heat switch room 5, flue gas is emitted heat again, and temperature is reduced to 80 ℃; Get into deduster 6, dust concentration 5mg/Nm after dedusting
3, be pressed into aiutage 8 by main air blower 7 and enter atmosphere.Simultaneously; Low boiling working fluid drives through working medium pump 14; Absorb the heat of fume afterheat carrier earlier in the separation sleeve pipe heat exchanger 11 in being installed on middle-low temperature heat switch room 5, become saturated vapor, behind pressure regulator valve; The working substance steam acting of in low boiling working fluid steam turbine 12, expanding, and drive threephase generator 13 generatings.The working substance steam of discharging from low boiling working fluid steam turbine 12 is condensed into saturated liquid by shell-and-tube cooler 16, sends in the separation sleeve pipe heat exchanger 11 circulation of a beginning new round after by working medium pump 14 worker quality liquid being pressurizeed again.From the recirculated water that shell-and-tube cooler 16 comes out,, send in the shell-and-tube cooler 16 circulation of a beginning new round through cooling tower 17 coolings through water pump 15.The electric energy that system sends is a three-phase alternating current, and rated voltage is 380V, incorporates electrical network in the factory into through after the pressure regulation, or directly gives consumer and use.
The maximum characteristics of this equipment are that the waste heat that adopts high temperature uniform flow straight tube plate evaporimeter to reclaim the metallurgical furnace high-temperature flue gas produces steam-electric power, adopts low boiling working fluid organic Rankine circulation cogeneration to reclaim the waste heat of low-temperature flue gas in the metallurgical furnace again, realize the exhaust heat stepped utilization of metallurgical furnace flue gas.With 150t/h metallurgical furnace UTILIZATION OF VESIDUAL HEAT IN 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 utility model can be realized the exhaust heat stepped utilization of metallurgical furnace flue gas, and the heat energy that can reclaim to greatest extent in the flue gas is converted into the high-grade electric energy, can also reach good environment protecting.
Claims (4)
1. exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas and dust-removing device special; Comprise combustion settling chamber, high temperature uniform flow straight tube plate evaporimeter, middle-low temperature heat switch room, deduster, main air blower, aiutage, it is characterized in that: said combustion settling chamber is through pipeline be linked in sequence high temperature uniform flow straight tube plate evaporimeter, middle-low temperature heat switch room, deduster, main air blower, aiutage.
2. exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas according to claim 1 and dust-removing device special is characterized in that: said high temperature uniform flow straight tube plate evaporimeter connects drum through pipeline, and drum connects steam accumulator through pipeline.
3. exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas according to claim 1 and dust-removing device special; It is characterized in that: said middle-low temperature heat is equipped with the separation sleeve pipe heat exchanger in the switch room; The entrance point of separation sleeve pipe heat exchanger is connected with the high-pressure outlet end of working medium circulating pump, and the port of export of separation sleeve pipe heat exchanger is connected with the upper flange interface of steam turbine behind pipeline, and the bottom interface of low boiling working fluid steam turbine is connected with the air inlet of shell-and-tube cooler through pipeline; The liquid phase outlet of shell-and-tube cooler is connected with the low pressure inlet end of working medium circulating pump through pipeline; The low boiling working fluid steam turbine is connected with threephase generator, and an end flange interface of shell-and-tube cooler is connected with water pump, and another end of shell-and-tube cooler connects cooling tower; Cooling tower is connected with water pump, constitutes a loop.
4. exhaust heat stepped utilization of metallurgical furnace high-temperature flue gas according to claim 3 and dust-removing device special is characterized in that: adopting R236EA is the circulation organic working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200931688U CN202470792U (en) | 2012-03-08 | 2012-03-08 | Metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200931688U CN202470792U (en) | 2012-03-08 | 2012-03-08 | Metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202470792U true CN202470792U (en) | 2012-10-03 |
Family
ID=46918946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200931688U Expired - Fee Related CN202470792U (en) | 2012-03-08 | 2012-03-08 | Metallurgical furnace high-temperature flue afterheat step utilizing and dust-removing special equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202470792U (en) |
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2012
- 2012-03-08 CN CN2012200931688U patent/CN202470792U/en not_active Expired - Fee Related
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Legal Events
| 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: 20121003 Termination date: 20150308 |
|
| EXPY | Termination of patent right or utility model |