CN220039130U - Thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgy flue gas - Google Patents
Thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgy flue gas Download PDFInfo
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- CN220039130U CN220039130U CN202320506367.5U CN202320506367U CN220039130U CN 220039130 U CN220039130 U CN 220039130U CN 202320506367 U CN202320506367 U CN 202320506367U CN 220039130 U CN220039130 U CN 220039130U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 75
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 title claims abstract description 22
- 238000009851 ferrous metallurgy Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000000926 separation method Methods 0.000 claims abstract description 59
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 45
- 238000000605 extraction Methods 0.000 claims description 71
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000008020 evaporation Effects 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010248 power generation Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims 2
- 230000005494 condensation Effects 0.000 claims 2
- 239000002912 waste gas Substances 0.000 claims 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The utility model provides a thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgical flue gas, which comprises a heat accumulator, a high-efficiency steam-water separation tank and a suction condensing turbine generator set, wherein the heat accumulator is connected with a saturated waste heat steam conveying pipeline through a pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank, the high-efficiency steam-water separation tank is connected with the suction condensing turbine generator set through a pipeline, the suction condensing turbine generator set is provided with a suction port of the suction condensing turbine generator set, the high-efficiency steam-water separation tank is connected with the steam heat pump set in parallel through a pipeline, and the steam heat pump set is provided with a suction port of the steam heat pump set.
Description
Technical Field
The utility model relates to flue gas waste heat recovery and heat energy level matching in the ferrous metallurgy industry, in particular to a thermodynamic system for ferrous metallurgy flue gas waste heat recovery and heat energy level matching.
Background
In the ferrous metallurgy industry, waste heat resources are generally discharged outwards in the form of medium-low temperature flue gas, and particularly the characteristics of a converter are more outstanding. In the oxygen blowing process, along with the increase of oxygen blowing intensity, the temperature and flow of discharged flue gas and the pressure of steam generated in the heat exchange process are also increased continuously; along with the reduction of the oxygen blowing amount, the flue gas temperature and the flow and pressure of the generated waste heat steam are also gradually reduced to a low point.
The earliest realization of semi-closed electric furnace waste heat recovery and utilization is that a tile steel mill of the America Ailck company is built, and then a flue gas purification waste heat utilization device of the semi-closed electric furnace is sequentially built in France and Japan, and the flue gas waste heat is recovered through a waste heat boiler to produce electric energy.
At present, a vaporization cooling device or a waste heat boiler is arranged at the heating furnace, the converter, the sintering machine, the coking and other parts of the domestic steel plant, a large amount of low-temperature low-pressure saturated steam is not recycled, and the air is directly discharged, so that the environment is polluted, and the energy is wasted greatly.
The potential market scale in China for waste heat recovery and utilization is large, but the installation scale is not 5% of the demand. The existing system is characterized in that low-pressure steam generated by a converter, a rolling line, a rotary hearth furnace and the like is used as a steam source, a heat recovery system mainly generating electricity is established, basically, waste heat steam generated by the converter is used as a single system design and implementation, the waste heat steam is not brought into the heat recovery system, the design of a heat accumulator is single, the economic benefit is mainly reflected by generating electricity, steam with required pressure level is not provided fully according to the requirements of heat users, and a reasonable heat exchange system is established according to the principles of cogeneration and cascade energy consumption.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgy flue gas, which can replace a single heat recovery system which is commonly adopted at home and abroad at present and mainly aims at recovering tail gas of an electric furnace and generating electricity, and is also more beneficial to the adjustment of the operation working condition of a heat accumulator.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a thermodynamic system for ferrous metallurgy flue gas waste heat recovery and heat energy level match, its characterized in that: the system comprises a heat accumulator, a high-efficiency steam-water separation tank and a condensing turbine generator unit, wherein the heat accumulator is connected with a saturated waste heat steam conveying pipeline through a pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank, the high-efficiency steam-water separation tank is connected with the condensing turbine generator unit through a pipeline, a condensing turbine generator unit steam extraction port is formed in the condensing turbine generator unit, the system further comprises a steam extraction dry pipe, one end of the steam extraction dry pipe is connected with the condensing turbine generator unit steam extraction port, the system further comprises a steam heat pump unit and a high-efficiency flash tank, the high-efficiency steam-water separation tank is connected with the steam heat pump unit through a pipeline in parallel, a steam heat pump unit suction inlet is formed in the steam heat pump unit, the high-efficiency flash tank is connected with the steam heat pump unit suction inlet through a pipeline, saturated waste heat steam is conveyed to the high-efficiency steam-water separation tank through the pipeline for steam-water separation, and is stored through the heat accumulator in the conveying pipeline, the high-efficiency steam-water separation tank is connected with a PLC for realizing automatic control, and the drying steam-extraction formed after the high-efficiency steam-water separation tank is connected with a PLC, the condensing turbine generator unit is respectively supplied with heat pump and condensing turbine generator unit, and the heat pump generator unit and the heat pump unit can be supplied with heat energy and heat pump unit when the condensing turbine generator unit and the heat pump unit are matched with the heat energy and the heat pump generator unit and the heat pump unit.
In the above structure: the utility model provides a thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgical flue gas, which comprises a heat accumulator, a high-efficiency steam-water separation tank, a suction condensing turbine generator set, a steam heat pump set and a high-efficiency flash tank, wherein the five parts are connected through pipelines and used for conveying saturated waste heat steam through arranging a saturated waste heat steam conveying pipeline; the extraction condensing type steam turbine generator set can provide various different pressure-grade steam for a heating power pipe network through the arranged steam heat pump unit according to the energy level matching principle only by arranging one extraction port of the extraction condensing type steam turbine generator set.
Further: the heat accumulator is provided with a heat accumulator steam inlet and a heat accumulator steam outlet, the high-efficiency steam-water separation tank is provided with a high-efficiency steam-water separation tank steam inlet and a high-efficiency steam-water separation tank steam outlet, the steam heat pump unit is further provided with a steam heat pump unit steam inlet and a steam heat pump unit steam outlet, the high-efficiency flash tank is provided with a high-efficiency flash tank secondary evaporation steam outlet, the condensing steam turbine generator unit is further provided with a condensing steam extraction steam turbine generator unit steam inlet, the heat accumulator steam inlet and the heat accumulator steam outlet are all connected with a saturated waste heat steam conveying pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank steam inlet, the high-efficiency steam-water separation tank steam outlet is respectively connected with the steam heat pump unit steam inlet and the condensing steam turbine generator unit steam inlet, the high-efficiency flash tank secondary evaporation steam outlet is connected with a steam heat pump unit suction inlet, and the steam pump unit steam outlet is connected with a low-pressure steam pipe network.
In the above structure: the heat accumulator steam inlet and the heat accumulator steam outlet are both connected with a saturated waste heat steam conveying pipeline, heat is accumulated for conveying saturated waste heat steam, the high temperature of the saturated waste heat steam is kept, the saturated waste heat steam conveying pipeline is connected with a steam inlet of a high-efficiency steam-water separation tank, the saturated waste heat steam is conveyed into the high-efficiency steam-water separation tank, the steam outlet of the high-efficiency steam-water separation tank is respectively connected with a steam inlet of a steam heat pump unit and a steam inlet of a condensing turbine generator unit, the dried waste heat steam after steam-water separation is respectively conveyed into the steam inlet of the steam heat pump unit and the steam inlet of the condensing turbine generator unit, a secondary evaporation steam outlet of the high-efficiency flash tank is connected with a suction inlet of the steam heat pump unit and is used for conveying the secondary evaporation steam into the steam heat pump unit, the steam outlet of the steam heat pump unit is connected with a low-pressure steam pipe network, and steam matched with energy levels is supplied to a heating power pipe network and production equipment, so that energy level matching and cascade utilization of heat energy are realized.
Further: the system also comprises a desalted water heat exchange station, one end of the steam extraction dry pipe is connected with a steam extraction port of the condensing turbine generator set, the other end of the steam extraction dry pipe is connected with the desalted water heat exchange station, and steam in the desalted water heat exchange station is extracted by the steam extraction dry pipe and is output through a supply pipeline to be used by a heat exchanger, a heater and a process equipment steam user in a factory.
In the above structure: the steam extraction dry pipe extracts the steam or waste steam of water treatment, incineration and the like in the desalted water heat exchange station, and the waste steam is output through the supply pipeline and then is used by a heat exchanger, a heater and a process equipment steam user in a factory.
Further: the condensing unit is characterized by further comprising a condenser, the condensing turbine generator set is further provided with a steam outlet of the tail end vacuum section of the condensing turbine, the steam outlet of the tail end vacuum section of the condensing turbine is connected with the condenser, the condenser is provided with a circulating water valve, and the circulating water valve is opened to circularly cool waste steam entering the condenser through circulating water.
In the above structure: the condenser is connected to the terminal vacuum section steam exhaust port of condensing turbine, is provided with the circulating water valve on the condenser, opens the circulating water valve, and circulating water enters into the condenser, cools off the steam, and circulating water rethread circulating water valve flows out to the cooling tower after the cooling, cools off, so circulates, realizes the circulative cooling to the exhaust steam.
Further: the generator is connected with the extraction condensing turbine generator set.
In the above structure: the generator is connected with the extraction condensing turbine generator set, and the extraction condensing turbine generator set is used for generating electricity for the generator.
Further: the heat exchanger is provided with a heat exchanger steam inlet and a heat exchanger steam outlet, the converter, the rolling line and the rotary hearth furnace are connected to the heat exchanger steam inlet through pipelines, and the heat exchanger steam outlet is connected with a saturated waste heat steam conveying pipeline through a pipeline.
In the above structure: the converter, the rolling line and the rotary hearth furnace are connected to a steam inlet of the heat exchanger through pipelines, the saturated waste heat steam discharged by the converter, the collected saturated waste heat steam and the heat exchanger are subjected to heat exchange, and then the saturated waste heat steam is discharged to a saturated waste heat steam conveying pipeline through a steam outlet of the heat exchanger for conveying.
Further: and steam condensate water input into the efficient flash tank is steamed to form secondary evaporation steam, and the secondary evaporation steam is conveyed to the suction inlet of the steam heat pump unit through the secondary evaporation steam outlet of the efficient flash tank.
In the above structure: and after steam condensate water is input into the efficient flash tank and is steamed, formed secondary evaporation steam is conveyed into the steam heat pump unit through a secondary evaporation steam outlet of the efficient flash tank to be used for generating power.
Compared with the prior art, the utility model has the beneficial effects that:
according to the system engineering guiding principle, the utility model establishes a complete heat recovery system, can replace the single heat recovery system which is commonly adopted at home and abroad at present and mainly aims at recovering tail gas of an electric furnace and generating electricity, and is also more beneficial to the adjustment of the operation working condition of the heat accumulator.
Through setting up heat pump heating system, under the condition that condensing load of extraction condensing steam turbine generating set is too low, if be less than the 30% of design maximum load, when generating set can not normally operate, can be through the external steam supply of special design steam heat pump unit, be similar to the steam extraction mouth of extraction condensing unit and realize the energy level matching.
The inlet of the steam turbine is provided with the high-efficiency steam-water separation device with automatic control, so that the dryness of steam entering the steam turbine is ensured, and the safe and reliable operation of the steam turbine is ensured.
By arranging the extraction condensing steam turbine generator set, the utility model can provide various different pressure steam for a heating power pipe network through a specially designed steam heat pump set according to the energy level matching principle only by arranging one steam extraction port.
Drawings
FIG. 1 is a schematic overall workflow of the present utility model.
List of reference numerals:
1. a heat accumulator; 2. a high-efficiency steam-water separation tank; 3. a steam heat pump unit; 4. a high efficiency flash tank; 5. a pump condensing type turbine generator set; 6. a generator; 7. a condenser; 8. a desalted water heat exchange station; 9. a steam extraction dry pipe; 10. a converter; 11. rolling lines; 12. a rotary hearth furnace; 13. a heat exchanger; 14. a supply pipe; A. a steam inlet of the heat accumulator; B. a steam outlet of the heat accumulator; C. a steam inlet of the high-efficiency steam-water separation tank; D. a steam outlet of the high-efficiency steam-water separation tank; E. a steam inlet of the steam heat pump unit; F. a suction inlet of the steam heat pump unit; G. a steam outlet of the steam heat pump unit; H. a secondary evaporation steam outlet of the high-efficiency flash tank; I. a steam inlet of the extraction condensing type steam turbine generator unit; J. a steam extraction port of the extraction condensing type steam turbine generator set; K. and a steam exhaust port of the vacuum section at the tail end of the extraction condensing steam turbine.
Detailed Description
The utility model is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1: the utility model provides a thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgical flue gas, which comprises a heat accumulator 1, a high-efficiency steam-water separation tank 2, a suction condensing steam turbine generator set 5, a steam heat pump set 3, a high-efficiency flash tank 4, a high-efficiency steam-water separation tank 2, a suction condensing steam turbine generator set 5, a suction drying pipe 9, a steam heat pump set 3, a high-efficiency flash tank 4, a suction condensing steam turbine generator set 3 and a suction condensing steam pump set 2, the efficient steam-water separation device is characterized in that a steam heat pump unit suction inlet F is arranged on the steam heat pump unit 3, the efficient flash tank 4 is connected to the steam heat pump unit suction inlet F through a pipeline, saturated waste heat steam is conveyed to the efficient steam-water separation tank 2 through a saturated waste heat steam conveying pipeline to be subjected to steam-water separation, heat is stored through the heat accumulator 1 in the conveying process, the efficient steam-water separation tank 2 is connected with the PLC to realize automatic control, dry waste heat steam formed after being separated by the efficient steam-water separation tank 2 is respectively conveyed to the extraction condensing type steam turbine generator unit 5 and the steam heat pump unit 3 to be used for generating electricity, when the condensing load of the extraction condensing type steam turbine generator unit 5 is too low, the steam heat pump unit 3 starts to work to supply steam to the outside, and steam matched with energy levels is supplied to a heating power pipe network and production equipment, and energy level matching and cascade utilization of heat energy are realized.
The utility model provides a thermodynamic system for waste heat recovery and heat energy level matching of ferrous metallurgy flue gas, which comprises a heat accumulator 1, a high-efficiency steam-water separation tank 2, a suction condensing turbine generator set 5, a steam heat pump set 3 and a high-efficiency flash tank 4, wherein the five are connected through pipelines, and a saturated waste heat steam conveying pipeline is arranged for conveying saturated waste heat steam, wherein the steam heat pump set 3 and the suction condensing turbine generator set 5 are connected in parallel, so that the steam heat pump set 3 can replace the suction condensing turbine generator set 5 to realize energy level matching and cascade utilization of heat energy when the condensing turbine generator set 5 cannot normally operate under the condition that the condensing load of the suction condensing turbine generator set 5 is too low, and the suction condensing turbine generator set 5 can safely and reliably operate through a PLC, and the heat energy level matching and the cascade utilization of the heat energy level can be realized by arranging the steam heat pump set 3 in a steam supply system of the suction condensing turbine generator set 5; the extraction condensing steam turbine generator set 5 can provide various different pressure steam levels for a heating power pipe network through the arranged steam heat pump unit 3 according to the energy level matching principle only by arranging one extraction condensing steam turbine generator set steam extraction opening J.
The saturated waste heat steam generated by the converter 10, the rolling line 11 and the rotary hearth furnace 12 is taken into a saturated waste heat steam conveying pipe, is conveyed into the high-efficiency steam-water separation tank 2 through the saturated waste heat steam conveying pipe, passes through the high-efficiency steam-water separation tank 2 with automatic control, and enters the extraction condensing turbine generator set 5 through a regulating valve at a turbine inlet. According to the production process requirement, a steam extraction opening J of a condensing turbine generator set is arranged, the equivalent rotary decompression of a turbine is utilized to replace the throttling decompression, after the power generation benefit is obtained, the power generation benefit enters an industrial enterprise steam pipe network according to the required parameters, the steam heat pump set 3 can be designed according to the parameter requirement required by a user, and the extracted steam or new steam is used as working steam of the steam heat pump set 3 to supply the steam with the pressure level required by the heat user.
In winter working conditions, as the steam consumption of the production process is increased, the rich steam quantity is reduced, the actual exhaust steam quantity is lower, and when the condensing load of the condensing turbine generator unit 5 is lower than 30% of the design maximum load, the condensing turbine generator unit 5 cannot normally operate, the steam heat pump unit 3 is put into operation, and steam matched with the energy level is supplied to a heating power pipe network and production equipment, so that the energy level matching and cascade utilization of heat energy are realized.
In this embodiment: the heat accumulator is characterized in that a heat accumulator steam inlet A and a heat accumulator steam outlet B are arranged on the heat accumulator 1, a high-efficiency steam-water separation tank steam inlet C and a high-efficiency steam-water separation tank steam outlet D are arranged on the high-efficiency steam-water separation tank 2, a steam heat pump unit steam inlet E and a steam heat pump unit steam outlet G are also arranged on the steam heat pump unit 3, a high-efficiency flash tank secondary evaporation steam outlet H is arranged on the high-efficiency flash tank 4, a condensing steam turbine generator unit steam inlet I is also arranged on the condensing steam turbine generator unit 5, the heat accumulator steam inlet A and the heat accumulator steam outlet B are both connected with a saturated waste heat steam conveying pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank steam inlet C, the high-efficiency steam-water separation tank steam outlet D is respectively connected with the steam heat pump unit steam inlet E and the condensing steam turbine generator unit steam inlet I, the high-efficiency flash tank secondary evaporation steam outlet H is connected with a steam heat pump unit suction inlet F, and the steam pump unit steam outlet G is connected with low-pressure steam. The heat accumulator steam inlet A and the heat accumulator steam outlet B are both connected with a saturated waste heat steam conveying pipeline, heat accumulation is carried out on conveying saturated waste heat steam, the high temperature of the saturated waste heat steam is kept, the saturated waste heat steam conveying pipeline is connected with a high-efficiency steam-water separation tank steam inlet C, the saturated waste heat steam is conveyed into a high-efficiency steam-water separation tank 2, a high-efficiency steam-water separation tank steam outlet D is respectively connected with a steam heat pump unit steam inlet E and a condensing turbine generator unit steam inlet I, respectively conveying the dry waste heat steam after steam-water separation into the steam heat pump unit steam inlet E and the condensing turbine generator unit steam inlet I, a high-efficiency flash tank secondary evaporation steam outlet H is connected with a steam heat pump unit suction inlet F and is used for conveying secondary evaporation steam into a steam heat pump unit 3, a steam heat pump unit steam outlet G is connected with a low-pressure steam pipe network, and steam matched with energy levels is supplied to a heating pipe network and production equipment, and energy level matching and cascade utilization of heat energy are achieved.
In this embodiment: the system further comprises a desalted water heat exchange station 8, one end of the steam extraction dry pipe 9 is connected with a steam extraction port J of the condensing turbine generator set, the other end of the steam extraction dry pipe is connected with the desalted water heat exchange station 8, and steam in the desalted water heat exchange station 8 is extracted by the steam extraction dry pipe 9 and is output through a supply pipeline 14 for a heat exchanger 13, a heater and a process equipment steam user in a factory. The steam extraction dry pipe 9 extracts steam or waste steam of water treatment, incineration and the like in the desalted water heat exchange station 8, and the waste steam is output through the supply pipeline 14 and then is used by a heat exchanger 13, a heater and a process equipment steam user in a factory.
In this embodiment: still include condenser 7, still be provided with extraction condensing turbine terminal vacuum section steam exhaust port K on the extraction condensing turbine generator unit 5, extraction condensing turbine terminal vacuum section steam exhaust port K connects condenser 7, be provided with the circulating water valve on the condenser 7, open the circulating water valve and carry out the circulative cooling to the waste steam that gets into in the condenser 7 through circulating water. The condenser 7 is connected to the terminal vacuum section steam outlet K of condensing turbine, is provided with the circulating water valve on the condenser 7, opens the circulating water valve, and circulating water enters into the condenser 7, cools off the steam, and circulating water flows out the cooling tower through the circulating water valve again after the cooling, cools off so the circulation, realizes the circulative cooling to the exhaust steam.
In this embodiment: the device also comprises a generator 6, and the generator 6 is connected with the extraction condensing type steam turbine generator set 5. The generator 6 is connected with the extraction condensing turbine generator set 5, and the extraction condensing turbine generator set 5 is used for generating power for the generator 6.
In this embodiment: the heat exchanger is characterized by further comprising a heat exchanger 13, wherein a heat exchanger 13 steam inlet and a heat exchanger 13 steam outlet are formed in the heat exchanger 13, the converter 10, the rolling line 11 and the rotary hearth furnace 12 are connected to the heat exchanger 13 steam inlet through pipelines, and the heat exchanger 13 steam outlet is connected with a saturated waste heat steam conveying pipeline through a pipeline. The converter 10, the rolling line 11 and the rotary hearth furnace 12 are connected to a steam inlet of the heat exchanger 13 through pipelines, collect saturated waste heat steam discharged by the converter 10, exchange heat in the heat exchanger 13, and then discharge the saturated waste heat steam into a saturated waste heat steam conveying pipeline through a steam outlet of the heat exchanger 13 for conveying.
In this embodiment: the steam condensate water input into the efficient flash tank 4 is steamed to form secondary evaporation steam, and the secondary evaporation steam is conveyed into the suction inlet F of the steam heat pump unit through the secondary evaporation steam outlet H of the efficient flash tank. After steam condensate water is input into the efficient flash tank 4 and is steamed, formed secondary steam is conveyed into the steam heat pump unit 3 through a secondary steam outlet H of the efficient flash tank to be used for generating power.
According to the system engineering guiding principle, the utility model establishes a complete heat recovery system, can replace the single heat recovery system which is commonly adopted at home and abroad at present and mainly aims at recovering tail gas of an electric furnace and generating electricity, and is also more beneficial to the adjustment of the operation working condition of the heat accumulator 1.
Through setting up heat pump heating system, under the condition that condensing load is too low for extraction condensing turbine generator set 5, if be less than the 30% of design maximum load, when generator 6 group can not normally operate, can be similar to the steam extraction mouth that extraction condensing unit realizes the energy level matching through the steam heat pump unit 3 of special design to the external steam supply.
The inlet of the steam turbine is provided with the high-efficiency steam-water separation device with automatic control, so that the dryness of steam entering the steam turbine is ensured, and the safe and reliable operation of the steam turbine is ensured.
By arranging the extraction condensing steam turbine generator set 5, the utility model can provide various different pressure steam for a heating power pipe network through the specially designed steam heat pump set 3 according to the energy level matching principle only by arranging one steam extraction port.
The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any other way, but is intended to cover any modifications or equivalent variations according to the technical spirit of the present utility model, which fall within the scope of the present utility model as defined by the appended claims.
Claims (7)
1. A thermodynamic system for ferrous metallurgy flue gas waste heat recovery and heat energy level match, its characterized in that: comprises a heat accumulator (1), a high-efficiency steam-water separation tank (2) and a extraction condensing turbine generator set (5), wherein the heat accumulator (1) is connected with a saturated waste heat steam conveying pipeline through a pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank (2), the high-efficiency steam-water separation tank (2) is connected with the extraction condensing turbine generator set (5) through a pipeline, the extraction condensing turbine generator set (5) is provided with an extraction opening (J) of the extraction condensing turbine generator set, the heat accumulator further comprises an extraction dry pipe (9), one end of the extraction dry pipe (9) is connected with the extraction opening (J) of the extraction condensing turbine generator set, the system also comprises a steam heat pump unit (3) and a high-efficiency flash tank (4), wherein the high-efficiency steam-water separation tank (2) is connected on the steam heat pump unit (3) in parallel through a pipeline, a steam heat pump unit suction inlet (F) is arranged on the steam heat pump unit (3), the high-efficiency flash tank (4) is connected on the steam heat pump unit suction inlet (F) through a pipeline, saturated waste heat steam is conveyed to the high-efficiency steam-water separation tank (2) through a saturated waste heat steam conveying pipeline for steam-water separation, heat is stored through a heat accumulator (1) in the conveying process, the high-efficiency steam-water separation tank (2) is connected with a PLC for realizing automatic control, and the dry waste heat steam formed after being separated by the high-efficiency steam-water separation tank (2) is respectively conveyed to the extraction condensing steam turbine generator unit (5) and the steam heat pump unit (3) for power generation, and when the condensing load of the extraction condensing steam turbine generator unit (5) is too low, the steam heat pump unit (3) starts to work for supplying steam to the outside, and steam matched with the energy level is supplied to a heating power pipe network and production equipment, so that the energy level matching and the cascade utilization of heat energy are realized.
2. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: the heat accumulator is characterized in that a heat accumulator steam inlet (A) and a heat accumulator steam outlet (B) are arranged on the heat accumulator (1), a high-efficiency steam-water separation tank steam inlet (C) and a high-efficiency steam-water separation tank steam outlet (D) are arranged on the high-efficiency steam-water separation tank (2), a steam heat pump unit steam inlet (E) and a steam heat pump unit steam outlet (G) are also arranged on the steam heat pump unit (3), a high-efficiency flash tank secondary evaporation steam outlet (H) is arranged on the high-efficiency flash tank (4), a steam extraction and condensation type steam turbine generator unit steam inlet (I) is also arranged on the steam extraction and condensation type steam turbine generator unit (5), the heat accumulator steam inlet (A) and the heat accumulator steam outlet (B) are both connected with a saturated waste heat steam conveying pipeline, the saturated waste heat steam conveying pipeline is connected with the high-efficiency steam-water separation tank steam inlet (C), the high-efficiency steam-water separation tank steam outlet (D) is respectively connected with the steam heat pump unit steam inlet (E) and the high-efficiency flash steam pump unit steam inlet (I), the steam extraction type steam turbine generator unit secondary evaporation steam outlet (H) is connected with the low-pressure steam pump generator unit steam inlet (F), and the low-pressure heat pump generator unit steam inlet (F) is connected with the low-pressure heat pump steam pump unit steam inlet (F).
3. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: the system further comprises a desalted water heat exchange station (8), one end of the steam extraction dry pipe (9) is connected with a steam extraction port (J) of the condensing turbine generator set, the other end of the steam extraction dry pipe is connected with the desalted water heat exchange station (8), and steam in the desalted water heat exchange station (8) is extracted by the steam extraction dry pipe (9) and is output through a supply pipeline (14) to be used by a heat exchanger, a heater and a process equipment steam user in a factory.
4. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: still include condenser (7), still be provided with on the extraction condensing turbine generating set (5) and take out terminal vacuum section steam vent (K) of condensing turbine, extraction condensing turbine terminal vacuum section steam vent (K) connect condenser (7), be provided with the circulating water valve on condenser (7), open the circulating water valve and carry out the circulative cooling through circulating water to the waste gas that gets into in condenser (7).
5. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: the device also comprises a generator (6), wherein the generator (6) is connected with the extraction condensing turbine generator set (5).
6. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: the heat exchanger is characterized by further comprising a heat exchanger (13), wherein a heat exchanger steam inlet and a heat exchanger steam outlet are formed in the heat exchanger (13), the converter (10), the rolling line (11) and the rotary hearth furnace (12) are respectively connected to the heat exchanger steam inlet through pipelines, and the heat exchanger steam outlet is connected with a saturated waste heat steam conveying pipeline through a pipeline.
7. The thermodynamic system for ferrous metallurgy flue gas waste heat recovery and thermal energy level matching of claim 1, wherein: and steam condensate water is input into the efficient flash tank (4) and is steamed to form secondary steam, and the secondary steam is conveyed into the suction inlet (F) of the steam heat pump unit through the secondary steam outlet (H) of the efficient flash tank.
Priority Applications (1)
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