CN210741136U - Boiler device suitable for submerged arc furnace waste heat power generation system - Google Patents
Boiler device suitable for submerged arc furnace waste heat power generation system Download PDFInfo
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- CN210741136U CN210741136U CN201921849341.0U CN201921849341U CN210741136U CN 210741136 U CN210741136 U CN 210741136U CN 201921849341 U CN201921849341 U CN 201921849341U CN 210741136 U CN210741136 U CN 210741136U
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- flue gas
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- submerged arc
- arc furnace
- boiler device
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- 239000002918 waste heat Substances 0.000 title claims abstract description 39
- 238000010248 power generation Methods 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000004321 preservation Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910001021 Ferroalloy Inorganic materials 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a boiler device suitable for a submerged arc furnace waste heat power generation system, which comprises a flue gas inlet, a heat exchange system and a flue gas outlet; the heat exchange system is sequentially provided with a high-temperature superheater, a low-temperature superheater, an evaporator I, an evaporator II, an evaporator III, an economizer I and an economizer II from top to bottom; the flue gas inlet is arranged at the top of the boiler device and is communicated with the high-temperature superheater; the flue gas outlet is arranged at the bottom of the boiler device and is communicated with an economizer II; the number of the heat exchange systems is 2, and each heat exchange system is correspondingly provided with a flue gas inlet, a flue gas outlet and an independent flue gas channel; each set of heat exchange system corresponds to one submerged arc furnace. The utility model can stably operate for a long time under the conditions that one ore-smelting furnace stops operating and one ore-smelting furnace operates; in addition, the flue gas and air pipeline is simplified, the occupied area is small, the operation and management are convenient, and the investment is saved.
Description
Technical Field
The utility model relates to a ferroalloy production flue gas waste heat recovery utilizes the field, in particular to boiler plant suitable for hot stove waste heat power generation system in ore deposit.
Background
The submerged arc furnace occupies a very important position in an industrial furnace kiln system, China is the first major ferroalloy production country in the world, and the national ferroalloy yield in 2013 is more than 3000 ten thousand tons and accounts for more than half of the total ferroalloy yield in the world. About 90 percent of products in the ferroalloy industry of China are produced by an electric heating method of a submerged arc furnace, the energy consumption is high, and the ferroalloy is a key industry of energy conservation and emission reduction in China. The power consumption of the submerged arc furnace accounts for 2 percent of the national generated energy, and the power consumption is concerned. The waste heat utilization of the submerged arc furnace is more and more emphasized, especially, the waste heat of the flue gas discharged in the production process of the submerged arc furnace is utilized to generate electricity, and the generated electricity is reused for production, so that the production electricity consumption can be reduced, the smelting cost of an enterprise is saved, the economic benefit of the enterprise is improved, and the environmental protection level of the enterprise can be improved.
In a submerged arc furnace waste heat power generation system, a waste heat boiler is the first threshold for waste heat recovery. Whether the waste heat boiler can normally operate is directly related to success or failure of the waste heat power generation project, and the waste heat generating capacity is directly influenced by the efficiency of the waste heat boiler, so that the feasibility of investment of the waste heat power generation project is related. At present, the waste heat boilers of submerged arc furnaces are multiple in type, various types such as vertical type, horizontal type and L-shaped waste heat boilers are adopted, the waste heat boilers are not selected from any type of boiler, long-term safe, reliable and efficient operation can be achieved, and the selection of a boiler device needs reasonable structural design, an efficient ash removal mode suitable for smoke characteristics, elaborate operation, strict maintenance and the like.
The boiler device of the prior submerged arc furnace waste heat power generation system has the problems of long smoke and air pipeline, large occupied area and complex system, and particularly aims at the submerged arc furnace waste heat power generation transformation system, the situation that the space is limited exists in the project site boiler arrangement, and how to solve the problem that the submerged arc furnace waste heat power generation system is in urgent need of solving the problem.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model aims at providing a boiler plant suitable for hot stove waste heat power generation system in ore deposit, the technical scheme of adoption as follows:
a boiler device suitable for a submerged arc furnace waste heat power generation system comprises a flue gas inlet, a heat exchange system and a flue gas outlet; the heat exchange system is sequentially provided with a high-temperature superheater, a low-temperature superheater, an evaporator I, an evaporator II, an evaporator III, an economizer I and an economizer II from top to bottom; the flue gas inlet is arranged at the top of the boiler device and is communicated with the high-temperature superheater; the flue gas outlet is arranged at the bottom of the boiler device and is communicated with an economizer II; the number of the heat exchange systems is 2, and each heat exchange system is correspondingly provided with a flue gas inlet, a flue gas outlet and an independent flue gas channel; each set of heat exchange system corresponds to one submerged arc furnace.
Further, the heat exchange surfaces of the high-temperature superheater, the low-temperature superheater, the evaporator I, the evaporator II, the evaporator III, the economizer I and the economizer II are all of a tube box type structure; and each layer of heat exchange surface is supported by a ventilation beam at the bottom of the tube box.
Furthermore, a steam drum is also arranged, and the 2 sets of heat exchange systems share the steam drum.
Furthermore, a set of steel ball ash removal device and a boiler ash bucket are also arranged, the steel ball ash removal device is also provided with a baffle, and the baffle is arranged in the boiler ash bucket.
Further, the flue gas channel is an all-steel inner guard plate channel.
Further, the furnace wall is a light heat-preservation furnace wall structure.
Further, the boiler device is of a vertical steel frame structure.
The utility model discloses have following advantage:
the utility model provides a boiler device suitable for a submerged arc furnace waste heat power generation system, which comprises two independent flue gas channels and can stably operate for a long time under the conditions that one submerged arc furnace is stopped and one submerged arc furnace is operated; only one steel ball ash removal device is arranged, so that the complexity of the system is reduced; the two submerged arc furnaces correspond to one waste heat boiler, so that under the condition of compact space, the flue gas and air pipeline can be simplified, the occupied area is small, the operation and management are convenient, and the investment is saved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
wherein, 1, a steel ball ash removal device; 2. a steam drum; 3. a flue gas inlet; 4. a high temperature superheater; 5. a low temperature superheater; 6. an evaporator I; 7. an evaporator II; 8. an evaporator III; 9. a coal economizer I; 10. an economizer II; 11. a flue gas outlet; 12. a boiler ash hopper; 13. and a baffle plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a boiler plant suitable for hot stove waste heat power generation system in ore deposit, overall design is vertical steel frame construction, and this boiler plant is provided with heat transfer system, and heat transfer system is from last to being equipped with 5 layers of heat exchangers down in proper order, is respectively: high temperature over heater 4, low temperature over heater 5, evaporimeter 16, evaporimeter II7, evaporimeter III8, economizer I9, economizer II10, gas inlet 3 sets up at boiler plant top, with high temperature over heater intercommunication, gas outlet 11 sets up in boiler plant bottom, with economizer II intercommunication. The heat exchange surfaces of the heat exchanger are all of a pipe box type structure; each layer of heat exchange surface is supported by a ventilation beam at the bottom of the tube box.
The boiler device can be provided with 2 sets of heat exchange systems, each set of heat exchange system comprises a flue gas inlet 3 and a flue gas outlet 11, and the heat exchange surface of each set of heat exchange system is an independent flue gas channel. Therefore, when the boiler device comprises 2 sets of heat exchange systems, the boiler device is provided with two flue gas inlets 3, two flue gas outlets 11 and two sets of heat exchange systems. One set of heat exchange system corresponds to one submerged arc furnace.
The boiler wall (not shown in the attached drawing) of the boiler device is of a light heat-preservation boiler wall structure, and a smoke channel of the boiler device is an all-steel inner guard plate channel.
The boiler device is of a single-pressure type, and is provided with a steam drum 2, and 2 sets of heat exchange systems share one steam drum 2.
The waste heat boiler can accumulate a large amount of dust in the operation process, the dust attached to the heat exchange surface can reduce the heat efficiency of the boiler, the passing area of smoke is reduced, the air speed is increased, the scouring wear of the boiler is increased, and therefore the service life of the boiler is shortened, and the ash removal is quite important in a waste heat utilization system of the waste heat boiler. Therefore, the boiler device also comprises a steel ball ash removal device 1, and the steel ball ash removal device 1 is also provided with a baffle 13 which is arranged in a boiler ash bucket 12. The steel ball ash removal device is simple in structure and reliable in operation, the whole ash removal system can complete steel ball circulating transportation, automatic unloading, automatic steel ball overturning, automatic steel ball ash separation, automatic spreading and automatic steel ball cleaning under the action of one motor, and the purpose of automatic ash removal of a waste heat boiler can be achieved.
The boiler device has the following advantages:
1. the boiler device is provided with two independent flue gas channels, and can stably operate for a long time under the conditions that one submerged arc furnace stops operating and the other submerged arc furnace operates.
2. The boiler device is only provided with one steel ball ash removal device, so that the complexity of the system is reduced.
3. The two submerged arc furnaces correspond to one waste heat boiler, so that under the condition of compact space, the flue gas and air pipeline can be simplified, the occupied area is small, the operation and management are convenient, and the investment is saved.
The boiler device comprises the following specific operation steps:
high-temperature dust-containing flue gas of the submerged arc furnace is horizontally introduced into the boiler device from a flue gas inlet 3 at one side, and is horizontally led out from a dust hopper at the lower part of the boiler through a flue gas outlet 11 at the bottom after passing through a high-temperature superheater 4, a low-temperature superheater 5, an evaporator I6, an evaporator II7, an evaporator III8, an economizer I9 and an economizer II 10.
High-temperature dust-containing flue gas of the other submerged arc furnace is introduced into the boiler device from the flue gas inlet 3 at the other side, and is also introduced out from the corresponding flue gas outlet 11 after heat exchange through the high-temperature superheater 4, the low-temperature superheater 5, the evaporator I6, the evaporator II7, the evaporator III8, the economizer 19 and the economizer II10 of the other set of heat exchange system.
After the boiler feed water is subjected to vacuum deoxygenation, condensed water is sent into two-stage economizers, namely an economizer I9 and an economizer II10 through a feed water pump, then is sent into a steam pocket 2 at the top of the boiler to be mixed with water existing in the steam pocket 2 to form boiler water, the boiler water is sent into 3 evaporators, namely an evaporator I6, an evaporator II7 and an evaporator III8 through a downcomer and a distribution pipeline, a generated steam-water mixture is sent into the steam pocket 2 from a steam-water communicating pipe of an upper header, and the boiler water is sent to a superheater for overheating after steam is separated from a steam-water separator in the steam pocket 2 and then is sent to a steam turbine for power generation, so that the waste heat of the submerged arc furnace is recycled.
The above description is only one embodiment of the present invention, and does not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A boiler device suitable for a submerged arc furnace waste heat power generation system is characterized by comprising a flue gas inlet, a heat exchange system and a flue gas outlet; the heat exchange system is sequentially provided with a high-temperature superheater, a low-temperature superheater, an evaporator I, an evaporator II, an evaporator III, an economizer I and an economizer II from top to bottom; the flue gas inlet is arranged at the top of the boiler device and is communicated with the high-temperature superheater; the flue gas outlet is arranged at the bottom of the boiler device and is communicated with an economizer II; the number of the heat exchange systems is 2, and each heat exchange system is correspondingly provided with a flue gas inlet, a flue gas outlet and an independent flue gas channel; each set of heat exchange system corresponds to one submerged arc furnace.
2. The boiler device suitable for the submerged arc furnace waste heat power generation system according to claim 1, wherein the heat exchange surfaces of the high-temperature superheater, the low-temperature superheater, the evaporator I, the evaporator II, the evaporator III, the economizer I and the economizer II are all of a tube box type structure; and each layer of heat exchange surface is supported by a ventilation beam at the bottom of the tube box.
3. The boiler device suitable for the submerged arc furnace waste heat power generation system according to claim 1, wherein a steam drum is further arranged, and the 2 sets of heat exchange systems share the steam drum.
4. The boiler device suitable for the submerged arc furnace waste heat power generation system as claimed in claim 3, wherein a set of steel ball ash removal device and a boiler ash bucket are further provided, the steel ball ash removal device is further provided with a baffle plate, and the baffle plate is arranged in the boiler ash bucket.
5. The boiler device suitable for the submerged arc furnace waste heat power generation system according to claim 1, wherein the flue gas channel is an all-steel inner guard plate channel.
6. The boiler device suitable for the submerged arc furnace waste heat power generation system according to claim 1, further comprising a furnace wall, wherein the furnace wall is of a light heat-preservation furnace wall structure.
7. The boiler device suitable for the submerged arc furnace waste heat power generation system according to claim 1, wherein the boiler device is of a vertical steel frame structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921849341.0U CN210741136U (en) | 2019-10-30 | 2019-10-30 | Boiler device suitable for submerged arc furnace waste heat power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921849341.0U CN210741136U (en) | 2019-10-30 | 2019-10-30 | Boiler device suitable for submerged arc furnace waste heat power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210741136U true CN210741136U (en) | 2020-06-12 |
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ID=70986214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921849341.0U Active CN210741136U (en) | 2019-10-30 | 2019-10-30 | Boiler device suitable for submerged arc furnace waste heat power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210741136U (en) |
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2019
- 2019-10-30 CN CN201921849341.0U patent/CN210741136U/en active Active
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