CN219865176U - Steam recovery power generation system for continuous casting waste heat boiler - Google Patents
Steam recovery power generation system for continuous casting waste heat boiler Download PDFInfo
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- CN219865176U CN219865176U CN202320133585.9U CN202320133585U CN219865176U CN 219865176 U CN219865176 U CN 219865176U CN 202320133585 U CN202320133585 U CN 202320133585U CN 219865176 U CN219865176 U CN 219865176U
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- steam
- waste heat
- heat boiler
- deaerator
- continuous casting
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- 239000002918 waste heat Substances 0.000 title claims abstract description 52
- 238000009749 continuous casting Methods 0.000 title claims abstract description 33
- 238000010248 power generation Methods 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model provides a steam recovery power generation system for a continuous casting waste heat boiler, which comprises the following components: a deaerator for removing impurity gas from the softened water; one end of the waste heat boiler is connected with the deaerator, and water is conveyed into the waste heat boiler to form saturated steam; one end of the steam superheating device is connected with the waste heat boiler, and the saturated steam generated in the waste heat boiler is heated to form superheated steam; a steam turbine that converts thermal energy into mechanical energy by using the superheated steam as power; and one end of the condensing device is connected with the deaerator, the other end of the condensing device is connected with the steam turbine, and the superheated steam is recovered and condensed to form circulation. The utility model has the beneficial effects that the softened water forms a closed circulation system according to the deaerator, the water supply pump, the waste heat boiler, the steam superheating device, the steam turbine, the condenser, the condensate pump and the deaerator, saturated steam is fully utilized and recycled, and the utilization efficiency of waste heat is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of continuous casting waste heat utilization, and particularly relates to a steam recovery power generation system for a continuous casting waste heat boiler.
Background
Along with the gradual maturity of a defect-free continuous casting billet production technology, a high-temperature continuous casting billet production technology, a process heat preservation and heat supplement technology, a rolling technology suitable for different casting billet heat histories and a steelmaking-steel rolling integrated production management technology. In particular to the perfection of the production technology of the high-temperature continuous casting billet, when the billet is produced from a crystallizer and a withdrawal and straightening machine of a continuous casting machine, the surface temperature of the billet casting billet is still 1000 ℃ (+/-10 ℃), and the temperature change from 1000 ℃ (+/-10 ℃) to 750 ℃ (+/-30 ℃) before the high-temperature billet comes out of the straightening machine to a continuous casting cooling bed. Because the steel billet is mainly exposed in the atmosphere, a large amount of heat is wasted, and the surrounding environment is polluted, so that the operating environment of workers becomes worse.
According to a steel heat dissipation calculation formula:
Q＝cm△t
q-kilojoules (k J) for absorbing or releasing heat
C-is the specific heat capacity of the steel, (kJ/kg ℃ C.) and is 0.46
M-mass of object, (kg)
Deltat-is the change in temperature (°C)
Before the withdrawal and straightening machine reaches the cooling bed, 160 ten thousand tons of continuous casting (corresponding to 120 tons of converters) are produced in one year to release 1.84 multiplied by 10 heat 12 KJ corresponds to a heat of about 5.1×10 8 KW, the amount of heat dissipated into the air is very large, and there is a need to develop a system that uses heat.
Disclosure of Invention
The utility model aims to solve the problem of providing a steam recovery power generation system for a continuous casting waste heat boiler, which effectively solves the problem that after a billet is produced from a crystallizer and a withdrawal and straightening machine of a continuous casting machine, the surface temperature of the billet casting blank is still 1000 ℃ (+/-10 ℃), and the temperature change from 1000 ℃ (+/-10 ℃) to 750 ℃ (+/-30 ℃) before the high-temperature billet is discharged from the straightening machine to a continuous casting cooling bed; the steel billet is mainly exposed in the atmosphere, a large amount of heat is wasted, and the environment is polluted, so that the operating environment of workers becomes worse.
In order to solve the technical problems, the utility model adopts the following technical scheme: a steam recovery power generation system for a continuous casting waste heat boiler, comprising:
a deaerator for removing impurity gas from the softened water;
one end of the waste heat boiler is connected with the deaerator, and water is conveyed into the waste heat boiler to form saturated steam;
one end of the steam superheating device is connected with the waste heat boiler, and the saturated steam generated in the waste heat boiler is heated to form superheated steam;
a steam turbine that converts thermal energy into mechanical energy by using the superheated steam as power;
and one end of the condensing device is connected with the deaerator, the other end of the condensing device is connected with the steam turbine, and the superheated steam is recovered and condensed to form circulation.
Preferably, the heat source of the waste heat boiler is a high-temperature billet produced by a continuous casting machine.
Preferably, the condensing means comprises a condenser for condensing the superheated steam.
Preferably, the condensing device further comprises a condensate pump, one end of the condensate pump is connected with the condenser, the other end of the condensate pump is connected with the deaerator, and softened water formed after condensation can be transmitted.
Preferably, the system further comprises a generator connected with the steam turbine, and the mechanical energy converted by the steam turbine drags the generator to generate electric energy.
Preferably, a water supply pump is further arranged between the deaerator and the waste heat boiler and used for conveying the softened water after deaeration is completed.
By adopting the technical scheme, the heat of the waste heat boiler is utilized to partially convert the heat into heat energy to form steam with certain pressure, and the steam is used for generating electric energy through a pipe network of a steel plant or directly entering a low-temperature saturated steam power generation turbine, so that the consumption of continuous casting production on energy sources is reduced.
By adopting the technical scheme, the softened water forms a closed circulation system according to the deaerator, the water supply pump, the waste heat boiler, the steam superheating device, the steam turbine, the condenser, the condensate pump and the deaerator, saturated steam is fully utilized and recycled, and the utilization efficiency of waste heat is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a steam recovery power generation system for a continuous casting waste heat boiler according to an embodiment of the present utility model
In the figure:
1. waste heat boiler 2, steam superheating device 3 and steam turbine
4. Generator 5, condenser 6 and condensate pump
7. Deaerator 8 and water supply pump
Detailed Description
The utility model is further illustrated by the following examples and figures:
in the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
As shown in a schematic structural diagram of a steam recovery power generation system for a continuous casting exhaust-heat boiler in fig. 1, a steam recovery power generation system for a continuous casting exhaust-heat boiler includes:
a deaerator 7 for removing impurity gas from the softened water; the softened water is transmitted to the interior of the deaerator 7 from the outside, and oxygen is removed from the interior of the deaerator, so that the whole waste heat boiler 1 is prevented from being oxidized due to excessive oxygen content in the softened water, and the service life of the waste heat boiler is prolonged; wherein the deaerator 7 supplies softened water from softened water needed by the continuous casting machine system;
one end of the waste heat boiler 1 is connected with a deaerator 7, and water is conveyed into the waste heat boiler 1 to form saturated steam; the waste heat boiler 1 is internally provided with a device for absorbing heat of a continuous casting billet, and softened water entering the waste heat boiler 1 can absorb heat to form saturated steam which enters the steam superheating device 2 for treatment;
a steam superheating device 2, one end of which is connected with the waste heat boiler 1, for heating saturated steam generated in the waste heat boiler 1 to form superheated steam;
a steam turbine 3 for converting thermal energy into mechanical energy by using superheated steam as power;
one end of the condensing device is connected with the deaerator 7, and the other end of the condensing device is connected with the steam turbine 3, and the superheated steam is recovered and condensed to form circulation;
the softened water flows along the route of the deaerator 7, the waste heat boiler 1, the steam superheating device 2, the steam turbine 3, the condensing device and the deaerator 7, and forms steam in the waste heat boiler 1 and the steam superheating device 2 to carry out closed circulation, so that the whole steam recovery power generation system is formed.
Specifically, the heat source of the waste heat boiler 1 is a high-temperature steel billet produced by a continuous casting machine, and the flow of softened water in the high-temperature steel billet is as follows: circulating water is introduced into the heating surface through the down pipe, the water circulates in the heating surface, the heating surface takes the continuous casting billet as a heat source, the heat of the continuous casting billet is absorbed, the water forms steam, the steam flows into the steam drum along with the up pipe, the steam drum is transmitted to the steam superheating device 2 for heating, the steam superheating device 2 heats saturated steam transmitted from the waste heat boiler 1 to form superheated steam, and the superheated steam enters the steam turbine 3 for providing conversion energy.
The steam turbine 3 is a rotary machine, and can convert the entering superheated steam, namely heat energy, into mechanical work to drag the target device to generate the required electric energy.
In some possible embodiments, the target device is configured to be connected to the generator 4 of the steam turbine 3, and the mechanical energy converted by the steam turbine 3 drags the generator 4 to generate electric energy to supply power to the outside.
The condensing means comprises a condenser 5 for condensing the superheated steam; one end of the condenser 5 is connected with the steam turbine 3, the other end is connected with the deaerator 7, the condensed steam water is deoxidized again, cyclic utilization is carried out, water resources can be further saved, and effective utilization is carried out.
In some possible embodiments, the condensing device further comprises a condensate pump 6, one end of which is connected with the condenser 5, and the other end of which is connected with the deaerator 7, so that softened water formed after condensation can be transported; the condensate pump 6 gives the power of the condensate, so that the condensate is smoothly transmitted into the deaerator 7 from the condenser 5, and the condition that the condensate cannot reach the deaerator 7 due to insufficient power is avoided.
In some possible embodiments, a water feeding pump 8 is further arranged between the deaerator 7 and the waste heat boiler 1, and is used for conveying softened water after deaeration is completed, so that a whole cycle is formed, the water feeding pump 8 is arranged to be consistent with a condensate pump, liquid cannot flow along with the condensate pump with a little power like gas, and pressurization is needed in the direction of counter gravity to advance, so that the water feeding pump 8 is needed to supply power for the flow of softened water to the waste heat boiler 1.
A method of using a steam recovery power generation system for a continuous casting waste heat boiler as described above, comprising: the softened water is subjected to impurity removal through a deaerator 7, then enters the waste heat boiler 1 through a water feeding pump 8 to generate saturated steam, the saturated steam enters the steam superheating device 2 to be heated to obtain superheated steam, the superheated steam provides power for the steam turbine 3 to perform energy conversion, the generator 4 is dragged to generate electricity, and then the condensate water is condensed in the condenser 5 to obtain condensate water, and flows back into the deaerator 7 through the condensate water pump 6.
The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (6)
1. A steam recovery power generation system for a continuous casting waste heat boiler, comprising:
a deaerator for removing impurity gas from the softened water;
one end of the waste heat boiler is connected with the deaerator, and water is conveyed into the waste heat boiler to form saturated steam;
one end of the steam superheating device is connected with the waste heat boiler, and the saturated steam generated in the waste heat boiler is heated to form superheated steam;
a steam turbine that converts thermal energy into mechanical energy by using the superheated steam as power;
and one end of the condensing device is connected with the deaerator, the other end of the condensing device is connected with the steam turbine, and the superheated steam is recovered and condensed to form circulation.
2. A steam recovery power generation system for a continuous casting waste heat boiler according to claim 1, wherein: the heat source of the waste heat boiler is a high-temperature steel billet produced by a continuous casting machine.
3. A steam recovery power generation system for a continuous casting waste heat boiler according to claim 1, wherein: the condensing device comprises a condenser for condensing the superheated steam.
4. A steam recovery power generation system for a continuous casting waste heat boiler according to claim 3, wherein: the condensing device further comprises a condensate pump, one end of the condensate pump is connected with the condenser, the other end of the condensate pump is connected with the deaerator, and softened water formed after condensation can be transmitted.
5. A steam recovery power generation system for a continuous casting waste heat boiler according to claim 1, wherein: the generator is connected with the steam turbine, and mechanical energy converted by the steam turbine drags the generator to generate electric energy.
6. A steam recovery power generation system for a continuous casting waste heat boiler according to claim 1, wherein: and a water supply pump is arranged between the deaerator and the waste heat boiler and is used for conveying the softened water after deaeration is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320133585.9U CN219865176U (en) | 2023-02-07 | 2023-02-07 | Steam recovery power generation system for continuous casting waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320133585.9U CN219865176U (en) | 2023-02-07 | 2023-02-07 | Steam recovery power generation system for continuous casting waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219865176U true CN219865176U (en) | 2023-10-20 |
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ID=88349009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320133585.9U Active CN219865176U (en) | 2023-02-07 | 2023-02-07 | Steam recovery power generation system for continuous casting waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219865176U (en) |
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2023
- 2023-02-07 CN CN202320133585.9U patent/CN219865176U/en active Active
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