CN107287369B - Air-cooled metallurgical sediment processing apparatus - Google Patents
Air-cooled metallurgical sediment processing apparatus Download PDFInfo
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- CN107287369B CN107287369B CN201710362577.0A CN201710362577A CN107287369B CN 107287369 B CN107287369 B CN 107287369B CN 201710362577 A CN201710362577 A CN 201710362577A CN 107287369 B CN107287369 B CN 107287369B
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- air
- slag
- stirling engine
- flue gas
- inlet pipeline
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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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
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
the invention relates to metallurgy, and provides an air-cooled metallurgical slag treatment device which comprises a slag box and an air inlet pipeline communicated with the slag box, wherein a first feed port is formed in the slag box, an air compressor is arranged on the air inlet pipeline, the air inlet pipeline further comprises a first Stirling engine, and at least part of a heat exchanger of the first Stirling engine extends into the slag box. In addition, because the heat exchanger of the first Stirling engine at least partially extends into the slag box, the heat exchanger can receive the heat radiation of the red slag and the heat energy of the air in the slag box, and the heat energy after heat exchange can drive the first Stirling engine to do power generation, thereby realizing the recycling of the heat carried by the red slag.
Description
Technical Field
The invention relates to metallurgy, in particular to an air-cooled metallurgical slag treatment device.
Background
With the development of the steel industry in China and the increase of the demand of steel, the discharge amount of metallurgical slag, particularly blast furnace slag and steel slag, serving as byproducts in the steel production process is increased year by year. The traditional air-cooled steel slag treatment has the advantages of small occupied area, high treatment speed and small granularity of the treated slag. However, the method has two disadvantages, namely, the waste heat is not recovered, and because the waste heat is high in discharge temperature and high in yield, if the waste heat cannot be reasonably treated and utilized, the waste heat not only greatly wastes secondary resources and energy, but also causes great pollution to the environment; and secondly, the final cooling mode still uses water cooling, so that the water cooling not only causes the waste of water resources, but also reduces the activity of slag.
Disclosure of Invention
The invention aims to provide an air-cooled metallurgical slag treatment device, which aims to solve the problem of waste heat waste in the existing air-cooled steel slag treatment process.
The invention is realized by the following steps:
The embodiment of the invention provides an air-cooled metallurgical slag treatment device which comprises a slag box and an air inlet pipeline communicated with the slag box, wherein a first feed port is formed in the slag box, an air compressor is arranged on the air inlet pipeline, the air inlet pipeline further comprises a first Stirling engine, and at least part of a heat exchanger of the first Stirling engine extends into the slag box.
Further, the cooler of the first Stirling engine is wrapped on the air path between the air inlet of the air inlet pipeline and the air compressor.
Further, still include the flue gas processing subassembly, the flue gas processing subassembly with the flue gas outlet intercommunication of slag box.
The gas-liquid separator further comprises a second Stirling engine, wherein at least part of a heat exchanger of the second Stirling engine extends into the flue gas treatment assembly, and a cooler of the second Stirling engine is wrapped on a gas path between the gas inlet of the gas inlet pipeline and the air compressor.
Furthermore, the flue gas treatment component comprises a cyclone dust collector, a bag-type dust collector and a chimney which are sequentially communicated, and the cyclone dust collector is communicated with the flue gas outlet of the slag box.
Further, still include conveyer and feed bin, the conveyer intercommunication the feed bin with the discharge gate of sediment case.
Further, still include the circulation circuit, the sediment case has the second feed inlet, the circulation circuit connect the second feed inlet with the conveyer, be provided with temperature sensor on the conveyer.
Furthermore, a hoisting machine is arranged on the circulating line.
Furthermore, chutes are arranged at the first feed inlet and the second feed inlet.
Further, a nozzle is arranged at the end part of the air inlet pipeline extending into the slag box, and the nozzle faces to the feeding path of the first feeding hole.
The invention has the following beneficial effects:
In the treatment device, the molten red slag generated by metallurgy is introduced into the slag box from the first feeding hole, the air inlet pipeline is used for compressing outside normal-temperature air through the air compressor and then spraying the compressed air into the slag box, the compressed air can crush and cool the red slag, and further the air cooling of the metallurgical slag is realized, the water is not used in the whole process, the water is saved, and the problem of low activity of the steel slag caused by water quenching is effectively prevented. In addition, at least part of the heat exchanger of the first Stirling engine extends into the slag box, the heat exchanger can receive heat radiation of red slag and heat energy of air in the slag box, and the heat energy after heat exchange can drive the first Stirling engine to do work to generate electricity, so that the red slag carrying heat can be recycled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an air-cooled metallurgical slag treatment device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an air-cooled metallurgical slag processing apparatus, including a slag box 1 and an air inlet pipeline 2, where the slag box 1 has a sealed heat insulation function, an air inlet of the air inlet pipeline 2 is communicated with the outside atmosphere, and an air outlet thereof extends into the slag box 1, the outside air can enter the slag box 1 through the air inlet pipeline 2, the slag box 1 is provided with a first feed inlet, the first feed inlet is mainly used for introducing molten red slag generated in a metallurgical process into the slag box 1, the red slag can be various metallurgical slag, such as blast furnace slag or steel slag, and the like, generally, a chute 11 is provided at the first feed inlet, one end of the chute 11 is located inside the slag box 1 and near the upper end of the inner wall of the slag box 1, and the other end extends to the outside and can be connected with a metallurgical production line, the whole is arranged obliquely, so that the red slag generated in the metallurgical process automatically enters the slag box 1 through the chute 11, the air inlet pipeline, the treatment device comprises a first Stirling engine 3, a heat exchanger 31 of the first Stirling engine 3 at least partially extends into the slag box 1, a cooler 32 of the first Stirling engine 3 is positioned outside the slag box 1, the heat exchanger 31 of the first Stirling engine 3 comprises a heat cavity and a heater, and heat exchange can be realized in the slag box 1. In the invention, the red slag is guided into the slag box 1 by the chute 11, and in the process that the red slag falls to the bottom of the slag box 1, the compressed air flow sprayed from the air inlet pipeline 2 can impact the red slag, so that not only can the effect of crushing the red slag be achieved, but also the heat exchange with the red slag can be achieved, and the temperature of the red slag is reduced, so that the effect of air-cooling the red slag is achieved, specifically, a nozzle 22 is arranged at the end part of the air inlet pipeline 2 extending into the slag box 1, the nozzle 22 faces to the feeding path of the first feeding hole, the air flow sprayed from the nozzle 22 can generate a better impact effect on the red slag on the feeding path, and the whole flow is free of water, so that the water is saved, and the problem of low activity of the steel slag caused by water quenching is effectively prevented; and on the other hand, the heat exchanger 31 of the first stirling engine 3 in the slag box 1 can accept the heat radiation of the red slag and the heat energy in the air in the slag box 1, the heat energy can make the gas in the first stirling engine 3 expand and compress, and then realize the purpose of power generation and power application, guarantee that the red slag carries the effective utilization of heat, and compare traditional vapor power generation, the heat utilization ratio is higher, the flow of the whole waste heat recovery flow is short simultaneously, the equipment is simple, the maintenance load is small, the fault rate is small, and the reliability is high.
In the preferred embodiment, the cooler 32 of the first stirling engine 3 is wrapped outside the air intake pipe 2 and is located on the air path between the air intake port of the air intake pipe 2 and the air compressor 21. In this embodiment, heat exchanger 31 of first stirling 3 is located slag box 1, and the heat that carries with the red sediment carries out the heat exchange and heaies up, wraps up its cooler 32 on air intake pipe 2 simultaneously, carries out the heat exchange with the air current in the air intake pipe 2 and cools down, and then can aggravate the difference in temperature between heat exchanger 31 of first stirling 3 and the cooler 32, not only can improve thermal rate of recovery, can also improve the rate of retransmission of first stirling 3 to the electric energy.
Continuing to optimize the above embodiment, the treatment device further comprises a flue gas treatment assembly 4, and the flue gas treatment assembly 4 is communicated with the flue gas outlet of the slag box 1. In this embodiment, the red sediment is cooled down in the interior forced air cooling of sediment case 1, and can produce a large amount of flue gases that carry the lime-ash in this in-process sediment case 1, and the flue gas is discharged and is purified in getting into flue gas treatment component 4 through the exhanst gas outlet of sediment case 1 to make it discharge in the external atmosphere. Aiming at the treatment device with the structure form, a second Stirling engine 5 can be additionally arranged, at least part of a heat exchanger of the second Stirling engine 5 extends into the flue gas treatment component 4, and a cooler of the second Stirling engine 5 is wrapped on a gas path between a gas inlet of the gas inlet pipeline 2 and the air compressor 21. In this embodiment, after the flue gas is discharged into the flue gas processing assembly 4 from the slag box 1, the flue gas temperature is still higher, the heat exchanger 51 of the second stirling engine 5 is located in the flue gas processing assembly 4 and can realize heat exchange with the flue gas in the flue gas processing assembly 4, so that the second stirling engine 5 can generate electricity and do work, the waste heat recovery of the processing device is further improved, the installation mode of the second stirling engine 5 is similar to that of the first stirling engine 3, the cooler 52 is wrapped on the air inlet pipeline 2 and exchanges heat with the air flow in the air inlet pipeline 2 to cool down, the heat recovery rate is continuously improved, and the transfer rate of the second stirling engine 5 to the electric energy is ensured. Generally, the cooler 52 of the second stirling engine 5 is located closer to the intake port of the intake pipe 2 than the cooler 32 of the first stirling engine 3 to ensure a temperature difference between the cooler 52 of the second stirling engine 5 and the heat exchanger 51.
Further, the structure of the flue gas treatment assembly 4 is refined, and comprises a cyclone dust collector 41, a bag-type dust collector 42 and a chimney 43 which are sequentially communicated, wherein the chimney 43 is communicated with the outside atmosphere, and the cyclone dust collector 41 is communicated with a flue gas outlet of the slag box 1. In this embodiment, the cyclone 41 is used for coarse dust removal, the bag-type dust remover 42 is used for fine dust removal, and for this purpose, the flue gas should enter the cyclone 41 and then enter the bag-type dust remover 42 for sequential dust removal, and the air after dust removal by the two can be exhausted to the outside atmosphere through the chimney 43. Certainly, the flue gas treatment assembly 4 should further include a fan 44, which is used as power for flowing flue gas in the flue gas treatment assembly 4 to drive the flue gas to flow along a predetermined track for dust removal, and the fan 44 is generally disposed on a flow path between the chimney 43 and the bag-type dust collector 42 to avoid that the service life of the fan 44 is affected by the high content of ash in the gas passing through the fan 44. In combination with the second stirling engine 5, because the flue gas discharged from the slag box 1 firstly enters the cyclone dust collector 41, the temperature of the flue gas in the cyclone dust collector 41 is relatively high, and at least part of the heat exchanger 51 of the second stirling engine 5 is extended into the cyclone dust collector 41 for heat exchange and temperature rise.
Further, the processing device also comprises a conveyor 6 and a bin 7, and the conveyor 6 is communicated with the bin 7 and the discharge hole of the slag box 1. In this embodiment, the whole vertical decurrent convergent column structure that is of lower extreme of sediment case 1, the discharge gate of sediment case 1 then is located the throat position, and then can make things convenient for the metallurgical sediment of sediment case 1 internal cooling (aforementioned red sediment, not red after the cooling) to be discharged by the discharge gate, and conveyer 6 is located the discharge gate under, and metallurgical sediment after the cooling drops to conveyer 6 in, is transported by conveyer 6 to deposit in feed bin 7 again. Normally, the bin 7 is higher than the conveyor 6, and the feeding inlet of the bin 7 is located at the upper end, a bucket elevator 71 is installed outside the bin 7, and the metallurgical slag on the conveyor 6 is conveyed into the bin 7 by the bucket elevator 71.
Optimizing the above embodiment, the processing apparatus further includes a circulation line 8, the slag box 1 has a second feeding port, the second feeding port is also located above the air outlet of the air inlet pipeline 2, the circulation line 8 connects the second feeding port with the conveyor 6, and a temperature sensor (not shown in the figure) is arranged on the conveyor 6 and is used for detecting the temperature of the metallurgical slag on the conveyor 6. In this embodiment, the chute 81 is also arranged at the second feeding port, the chute 81 is also arranged in an inclined manner, and the circulating line 8 is connected with the chute 81 corresponding to the second feeding port of the conveyor 6, so that the metallurgical slag on the conveyor 6 can be guided into the slag box 1 again. Usually, there is a control center, the conveyor 6 and the temperature sensor are both electrically connected to the control center, and a cooling temperature is set in the control center, for example, 100 ℃, when the temperature sensor detects that the temperature of the cooled metallurgical slag is lower than 100 ℃, the information is fed back to the control center, the control center compares the set temperature and then controls the conveyor 6 to convey the metallurgical slag to a storage bin 7 for storage, if the temperature detected by the temperature sensor is higher than 100 ℃, the control center controls the conveyor 6 to convey the metallurgical slag to a circulation line 8, and the metallurgical slag is reintroduced into the slag box 1 for cooling. Certainly, the chute 81 corresponding to the second feeding hole also corresponds to the air flow discharged by the air inlet pipeline 2, and the nozzle 12 also faces to the feeding path corresponding to the second feeding hole, so that the air flow can impact the metallurgical slag introduced by the chute 81, and the purpose of rapid cooling is achieved. On the other hand, the cyclone 41 is also positioned right above the conveyor 6, large-particle ash in the cyclone 41 also falls on the conveyor 6, the temperature of the large-particle ash is also detected by the temperature sensor, and the large-particle ash is controlled by the conveyor 6 to enter the storage bin 7 for storage or is guided into the slag box 1 for repeated cooling. A reversible refractory disc conveyor 6 can be used for the conveyor 6, the circulation line 8 and the silo 7 are respectively positioned at two ends of the conveyor 6 with opposite movement, and the metallurgical slag is conveyed into the silo 7 or the circulation line 8 through the forward and reverse movement of the conveyor 6. The circulation line 8 is mainly also a hoist 82, and the conveyor 6 conveys the high-temperature metallurgical slag into the hoist 82 and introduces the high-temperature metallurgical slag into the chute 81 corresponding to the second feed opening by the hoist 82.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a metallurgical sediment processing apparatus of air-cooled, including the sediment case and with the air inlet pipeline of sediment case intercommunication, be provided with first feed inlet on the sediment case, be provided with the air compressor machine on the air inlet pipeline, its characterized in that: still include first stirling, first stirling's the heat exchanger part at least stretches into in the sediment case, in the air inlet pipeline stretches into the tip department of sediment case is provided with the nozzle, the nozzle orientation the feedstock path of first feed inlet still includes conveyer and feed bin, the conveyer intercommunication the feed bin with the discharge gate of sediment case still includes the circulation circuit, the sediment case has the second feed inlet, the circulation circuit is connected the second feed inlet with the conveyer, be provided with temperature sensor on the conveyer.
2. The air-cooled metallurgical slag treatment apparatus of claim 1, wherein: and the cooler of the first Stirling engine is wrapped on the air path between the air inlet of the air inlet pipeline and the air compressor.
3. The air-cooled metallurgical slag treatment apparatus of claim 1, wherein: still include the flue gas processing subassembly, the flue gas processing subassembly with the exhanst gas outlet intercommunication of sediment case.
4. An air-cooled metallurgical slag treatment apparatus according to claim 3, wherein: the gas treatment device is characterized by further comprising a second Stirling engine, wherein at least part of a heat exchanger of the second Stirling engine extends into the flue gas treatment assembly, and a cooler of the second Stirling engine is wrapped on a gas path between a gas inlet of the gas inlet pipeline and the air compressor.
5. An air-cooled metallurgical slag treatment apparatus according to claim 3, wherein: the flue gas treatment component comprises a cyclone dust collector, a bag-type dust collector and a chimney which are sequentially communicated, and the cyclone dust collector is communicated with a flue gas outlet of the slag box.
6. The air-cooled metallurgical slag treatment apparatus of claim 1, wherein: and a hoisting machine is arranged on the circulating line.
7. The air-cooled metallurgical slag treatment apparatus of claim 1, wherein: the first feed inlet and the second feed inlet are both provided with chutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362577.0A CN107287369B (en) | 2017-05-22 | 2017-05-22 | Air-cooled metallurgical sediment processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362577.0A CN107287369B (en) | 2017-05-22 | 2017-05-22 | Air-cooled metallurgical sediment processing apparatus |
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| CN107287369A CN107287369A (en) | 2017-10-24 |
| CN107287369B true CN107287369B (en) | 2019-12-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206704A (en) * | 2001-01-05 | 2002-07-26 | Takuma Co Ltd | Heat storage type heat exchanger |
| CN202415574U (en) * | 2011-12-20 | 2012-09-05 | 南京凯盛开能环保能源有限公司 | Molten slag quenching and dry granulating and sensible heat recovery power generation system |
| CN106521057A (en) * | 2016-11-30 | 2017-03-22 | 中冶南方工程技术有限公司 | Device for recovering waste heat from steel slag pit hot stewing treatment |
| CN206843514U (en) * | 2017-05-22 | 2018-01-05 | 中冶南方工程技术有限公司 | Air-cooled metallurgical slag treatment apparatus |
-
2017
- 2017-05-22 CN CN201710362577.0A patent/CN107287369B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002206704A (en) * | 2001-01-05 | 2002-07-26 | Takuma Co Ltd | Heat storage type heat exchanger |
| CN202415574U (en) * | 2011-12-20 | 2012-09-05 | 南京凯盛开能环保能源有限公司 | Molten slag quenching and dry granulating and sensible heat recovery power generation system |
| CN106521057A (en) * | 2016-11-30 | 2017-03-22 | 中冶南方工程技术有限公司 | Device for recovering waste heat from steel slag pit hot stewing treatment |
| CN206843514U (en) * | 2017-05-22 | 2018-01-05 | 中冶南方工程技术有限公司 | Air-cooled metallurgical slag treatment apparatus |
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| CN107287369A (en) | 2017-10-24 |
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