CN217578967U - Steel slag splashing prevention device and converter slag heat-taking power generation system adopting same - Google Patents
Steel slag splashing prevention device and converter slag heat-taking power generation system adopting same Download PDFInfo
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- CN217578967U CN217578967U CN202220883450.XU CN202220883450U CN217578967U CN 217578967 U CN217578967 U CN 217578967U CN 202220883450 U CN202220883450 U CN 202220883450U CN 217578967 U CN217578967 U CN 217578967U
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Abstract
The utility model discloses a prevent that slag from splashing device and adopt device's converter slag gets hot power generation system belongs to machinery, prevent that the slag from splashing the device for narrow trapezoidal funnel structure under wide, trapezoidal funnel structure is enclosed by the splashproof backplate, installs the hydraulic pressure top jar that is used for preventing converter slag adhesion on the splashproof backplate inner wall on its at least one side lateral wall. The utility model has the advantages that: the converter slag falls into the slag casting hopper from the lower opening of the trapezoidal funnel structure through the upper opening of the trapezoidal funnel structure along the inner wall of the trapezoidal funnel structure, and splashing of the converter slag is effectively prevented.
Description
Technical Field
The utility model relates to the field of machinary, particularly, relate to a prevent that slag splashes device and adopt device's converter slag to get hot power generation system.
Background
The existing method for generating power by taking heat from converter slag mainly comprises the steps of feeding converter smelting slag into a slag basin, piling up the slag basin for several times, then discharging the slag from a furnace slag basin vehicle, and pouring the slag into a processing device to chop the slag into fragments. Blowing cold air for heat exchange to obtain hot air; the hot air enters the heat exchanger to heat water and turns into steam, the steam drags the steam turbine to generate electricity, and the steam which does work enters the cooling tower to be cooled. The mode has low efficiency of converting heat energy into electric energy, and can not effectively utilize low-temperature waste heat, and in addition, a large amount of heat is lost in the process of pouring converter slag into a slag basin and conveying the converter slag by a slag basin vehicle, so that great heat waste is caused.
Therefore, how to improve the utilization efficiency of the converter slag heat and reduce the heat waste is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The thermal utilization efficiency of converter slag that exists for overcoming prior art converter slag and getting thermal power generation is low, the waste of heat is serious, especially can't carry out the problem such as effectively utilize to the low temperature waste heat, the utility model provides a prevent that slag splashes the device, prevent that slag splashes the device and be narrow trapezoidal funnel structure about wide, trapezoidal funnel structure is enclosed by the splashproof backplate, installs the hydraulic pressure top jar that is used for preventing converter slag adhesion on the splashproof backplate inner wall on its at least one side lateral wall.
Preferably, the hydraulic top cylinder is installed on the splash guard outer wall, and a mounting hole is formed in the splash guard outer wall corresponding to the hydraulic top cylinder.
Preferably, the hydraulic pressure top cylinder fixed end passes through top cylinder pedestal fixed mounting in splashproof backplate outer wall mounting hole border department, the hydraulic pressure top cylinder top is located inside the mounting hole.
Preferably, the top cylinder base body is fixedly installed at the edge of the installation hole through a bolt and a nut.
Preferably, the splash guard plate comprises a corrosion-resistant stainless steel plate, heat-preservation cotton and a protective galvanized plate from inside to outside.
Preferably, the corrosion-resistant stainless steel plate has a thickness of 30mm.
This patent still provides a converter slag power generation system that gets heat, prevents the slag device that splashes including the aforesaid, still includes cast slag fill, waste heat recovery boiler and is used for the cast slag fill conveying system that carries with cast slag fill circulation under the converter between waste heat recovery boiler, prevent that the slag device that splashes is located the converter and casts between the slag fill.
Preferably, a converter slag steam Rankine cycle power generation system and a converter slag thermal semiconductor temperature difference power generation system are sequentially arranged in the waste heat recovery boiler along the conveying direction of the cast slag hopper, and a cooling air port is formed in the side wall of the waste heat recovery boiler.
Preferably, the converter slag steam Rankine cycle power generation system is located in the waste heat recovery boiler and is located right above the cast slag hopper and close to the inlet.
Preferably, the converter slag steam Rankine cycle power generation system comprises a waste heat boiler tube, a water inlet of the waste heat boiler tube is connected with a water outlet of the condenser, and a water outlet of the waste heat boiler tube is connected with the steam turbine power generation system. A steam pocket is also arranged between the waste heat boiler tube and the steam turbine power generation system.
Has the advantages that:
adopt the utility model discloses technical scheme produces beneficial effect as follows:
(1) Under many circumstances, the converter is rotatory to pour into the in-process of the sediment fill with converter slag, and converter slag takes place to splash easily, causes calorific loss, damages sediment fill and conveying chain, can harm operation personnel's personal safety even, sets up one here and prevents the slag device that splashes between converter and sediment fill for prevent that converter slag from pouring into the calorific loss of the in-process of sediment fill, reduce the adverse effect that causes equipment and personnel.
(2) A converter slag heat-taking power generation system is arranged below the converter, a waste heat boiler system is established at a high-temperature section, and power is generated by adopting a steam Rankine cycle principle; the flue gas that the low temperature section was taken out is <350 ℃, adopts semiconductor thermoelectric generation principle electricity generation, has improved the recovery ability to the low temperature waste heat, has realized the thermal step recycle of converter slag, and then has improved the thermal utilization efficiency of converter slag.
(3) The existing converter slag conveying and transporting mode is cancelled, a slag-free basin processing system under the converter is adopted, the continuous processing of the converter slag is realized by using a slag-casting bucket conveying system, a plurality of small converter slag blocks are cast, the processes of slag chopping and crushing are avoided, the energy consumption is reduced, the heat radiation area of the high-temperature converter slag on the water-cooled tube waste heat boiler tube is increased, and the high-temperature steam is directly generated for power generation.
(4) The slag falls into the slag casting hopper and is cast into a slag block, and then the slag block enters the waste heat recovery boiler, and the heat is transferred to the furnace tube of the waste heat boiler by utilizing the high-temperature radiation heat transfer of the slag block, so that the furnace tube of the waste heat boiler directly generates high-temperature steam for power generation.
(5) By means of semiconductor temperature difference power generation, low-temperature waste heat in the converter slag cascade waste heat is recovered, the maximum advantage of semiconductor temperature difference power generation of low-end waste heat in the converter slag low-temperature waste heat is fully exerted, and efficient utilization of low-grade energy is achieved.
(6) By accounting, 1KW.h of electricity is generated by the system every time, about 0.35Kg of standard coal and 4Kg of water are saved; the emission of 1.1Kg of Co2, SO2 and nitrogen oxides is reduced, the heat of the converter slag is converted into electric energy, the utilization efficiency of energy is improved, and the environmental pollution is reduced.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings which are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.
FIG. 1 is a schematic diagram of a preferred converter slag heat-extracting power generation system of the present invention;
FIG. 2 is a schematic diagram of a preferred converter slag thermal semiconductor temperature difference power generation system of the present invention;
FIG. 3 is a schematic diagram of a preferred mold release agent spraying apparatus of the present invention;
fig. 4 is a schematic diagram of a preferred hydraulic jacking cylinder of the present invention.
In the figure, 1, a casting slag hopper; 11. a converter; 2. a waste heat recovery boiler; 21. a cold air delivery port;
22. a single-roll crushing system; 23. lifting and conveying a rubber belt; 3. a slag hopper conveying system; 31. a drive gear; 32. a conveying chain; 4. a converter slag steam Rankine cycle power generation system;
41. a waste heat boiler tube; 42. a condenser; 43. a steam turbine power generation system; 44. a steam drum;
5. a converter slag thermal semiconductor temperature difference power generation system; 51. a hot air collection header pipe; 52. a hot side heat exchanger; 53. a cold end heat exchanger; 54. a conductive sheet; 55. a P-type semiconductor power generation chip;
56. an N-type semiconductor power generation chip; 57. a hot end insulating heat transfer layer; 58. a cold end insulating heat transfer layer; 6. a release agent spraying device; 61. a release agent stirring tank; 62. a release agent delivery conduit; 63. spraying a pipe; 64. a nozzle; 65. a drive motor; 66. a mechanical swing reducer; 67. a metal hose; 68. a blender; 69. a pump body; 7. a steel slag splashing prevention device; 71. a splash guard plate; 711. a corrosion-resistant stainless steel plate; 712. heat preservation cotton; 713. protecting the galvanized sheet; 72. a hydraulic jacking cylinder; 73. a cylinder jacking seat body; 74. and (7) installing holes.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the embodiment, a converter slag heat-taking power generation system is arranged below the converter, a waste heat boiler system is established in a high-temperature section, and power is generated by adopting a steam Rankine cycle principle; the flue gas that the low temperature section was taken out is <350 ℃, adopts semiconductor thermoelectric generation principle electricity generation, has improved the recovery ability to the low temperature waste heat, has realized the thermal step recycle of converter slag, and then has improved the thermal utilization efficiency of converter slag. The specific implementation mode is as follows:
as shown in fig. 1, the converter slag heat-taking power generation system comprises a cast slag bucket 1, a waste heat recovery boiler 2 and a cast slag bucket conveying system 3 for circularly conveying the cast slag bucket 1 between the position right below a converter 11 and the waste heat recovery boiler 2, a converter slag steam rankine cycle power generation system 4 and a converter slag thermal semiconductor temperature difference power generation system 5 are sequentially arranged in the waste heat recovery boiler 2 along the conveying direction of the cast slag bucket 1, and a cooling air inlet 21 is formed in the side wall of the waste heat recovery boiler 2.
A converter slag heat-taking power generation system is arranged below the converter 11, a waste heat boiler system is established in a high-temperature section, and power is generated by adopting a steam Rankine cycle principle; the flue gas that the low temperature section was taken out is <350 ℃, adopts semiconductor thermoelectric generation principle electricity generation, has improved the recovery ability to the low temperature waste heat, has realized the thermal step recycle of converter slag, and then has improved the thermal utilization efficiency of converter slag.
In a preferred embodiment, the converter slag steam rankine cycle power generation system 4 is located in the heat recovery boiler 2 at a position immediately above the slag ladle 1 and near the inlet. The slag falls into the slag casting hopper and is cast into a slag block, and then the slag block enters the waste heat recovery boiler, and the heat is transferred to the furnace tube of the waste heat boiler by utilizing the high-temperature radiation heat transfer of the slag block, so that the furnace tube of the waste heat boiler directly generates high-temperature steam for power generation.
In a preferred embodiment, the converter slag steam rankine cycle power generation system 4 comprises a waste heat boiler tube 41, wherein a water inlet of the waste heat boiler tube 41 is connected with a water outlet of a condenser 42, and a water outlet of the waste heat boiler tube is connected with a steam turbine power generation system 43. A steam pocket 44 is also arranged between the waste heat boiler tube 41 and the steam turbine power generation system 43. The air outlet of the steam turbine power generation system 43 is connected with the water inlet of the condenser 42, so that the steam cycle power generation is formed.
In a preferred embodiment, the heat recovery boiler tubes 41 are coiled tube rows. The snakelike bank of tubes is by the level and the main part pipe of mutual parallel arrangement with be used for forming the snakelike connecting portion of main part pipe end to end series, snakelike bank of tubes place plane can be parallel with the horizontal plane, also can be perpendicular, prefers the entry of snakelike bank of tubes is located and is close to waste heat recovery boiler export one side, and the snakelike outlet of tubes is located and is close to waste heat recovery boiler entry one side.
In a preferred embodiment, a cool air sending port 21 is formed in the sidewall of the heat recovery boiler 2 at a position below the slag hopper. And after cold air of the air cooling port enters the waste heat recovery boiler, the cold air exchanges heat with slag blocks in the slag casting hopper to form hot air and flows to the converter slag thermal semiconductor temperature difference power generation system, and the hot air can also exchange heat with the pipe wall of the waste heat boiler pipe in the process of flowing to the converter slag thermal semiconductor temperature difference power generation system. The cold air ports can be horizontally arranged into one row or more than two rows.
In a preferred embodiment, the converter slag thermal semiconductor temperature difference power generation system 5 is located above one end of the heat recovery boiler 2 close to the outlet, and a cooling air inlet 21 is formed in a side wall of the heat recovery boiler 2 between the converter slag steam rankine cycle power generation system 4 and the converter slag thermal semiconductor temperature difference power generation system 5. Preferably, the air cooling and conveying nozzles can be horizontally arranged into two rows which are respectively positioned above and below the slag hopper, and can also be horizontally arranged into a plurality of rows.
As a preferred embodiment, as shown in fig. 2, the converter slag thermal semiconductor temperature difference power generation system 5 includes a hot air collecting main pipe 51, a hot end heat exchanger 52, a cold end heat exchanger 53, a conducting strip 54, a P-type semiconductor power generation chip 55 and an N-type semiconductor power generation chip 56, an outlet of the hot air collecting main pipe 51 is connected to an inlet of the hot end heat exchanger 52, and the hot end heat exchanger 52 and the cold end heat exchanger 53 are both in a tubular structure and are arranged in parallel along a length direction; the conducting strips 54 are alternately arranged at positions close to one side of each other on the outer side walls of the hot end heat exchanger 52 and the cold end heat exchanger 53 along the length direction of the hot end heat exchanger 52, and the ends of the conducting strips 54 on the outer side walls of the hot end heat exchanger 52 and the cold end heat exchanger 53 are alternately connected in series by the P-type semiconductor power generation chip 55 and the N-type semiconductor power generation chip 56 to form a semiconductor thermoelectric power generation structure. After the hot air is generated by the hot end heat exchanger, the hot air is dedusted by the bag dedusting device to form clean air which is exhausted by the induced draft fan.
In a preferred embodiment, a hot-end insulating heat transfer layer 57 is arranged between the conductive sheet 54 and the outer side wall of the hot-end heat exchanger 52; a cold end insulating heat transfer layer 58 is arranged between the conducting strip 54 and the outer side wall of the cold end heat exchanger 53.
In a preferred embodiment, the ladle conveyor system 3 comprises two horizontally arranged drive gears 31 and a conveyor chain 32 mounted on the surface of the two drive gears 31, and the ladle 1 is mounted on the conveyor chain 32 and can move along with the conveyor chain 32. The conveying chain is driven by the driving gear to convey the cast slag hopper, and the large gear motor reducer controls the slag hopper on the chain to move seamlessly.
As a preferred embodiment, the outlet of the waste heat recovery boiler 2 is located below the converter slag thermal semiconductor temperature difference power generation system 5, the outlet is located underground, the single-roller crushing system 22 is arranged at the outlet, the slag blocks at the tail end of the conveying chain 32 are demolded and separated from the slag casting hopper 1, the slag blocks are crushed by the single-roller crushing system to form fine slag blocks, the fine slag blocks are conveyed to a hopper on the ground from the underground by a material lifting conveying rubber belt 23, the fine slag blocks are conveyed to a tailing treatment plant by an automobile or a train to be ground, and after iron-containing materials are separated, the fine slag blocks are used as building cement raw materials to realize green pollution-free treatment.
In order to facilitate the detachment of the slag lumps from the slag hopper, a layer of mold release agent may be sprayed on the surface of the converter slag before it falls into the slag hopper 1. Specifically, a release agent spraying device 6 is installed below the lower layer conveying chain.
As a preferred embodiment, as shown in fig. 3, the mold release agent spraying device 6 comprises a mold release agent stirring pool 61, a mold release agent conveying pipeline 62 and a spraying pipe 63, wherein nozzles 64 are uniformly distributed on the spraying pipe 63 along the length direction, a mechanical swing reducer 66 and a driving motor 65 are mounted at one end of the spraying pipe 63, the input end of the mechanical swing reducer 66 is mounted at the output end of the driving motor 65, and the spraying pipe 63 can be controlled to rotate and swing on the horizontal plane by 45 degrees under the driving action of the driving motor 65, so that the uniformity of the mold release agent spraying on the surface of the casting slag hopper is improved.
In a preferred embodiment, a section of flexible metal hose 67 is provided on the release agent delivery pipe 62 at the connection position with the spray pipe 63, so as to facilitate the mechanical swing of the spray pipe.
In a preferred embodiment, an agitator 68 is provided in the release agent agitation tank 61.
In a preferred embodiment, a pump body 69 for delivering the release agent to the spray pipe is installed in the release agent stirring tank 61 at the inlet of the release agent delivery pipe.
In a preferable embodiment, the release agent is formed by mixing lime, coal slime and water according to a certain proportion.
In a preferred embodiment, a water return trench (not shown) is arranged at a position below the lower layer conveying chain, and the excess release agent flows back to the release agent stirring pool after passing through the water return trench.
In many cases, the converter is rotated to pour the converter slag into the cast slag bucket, the converter slag is easy to splash, heat loss is caused, the cast slag bucket and a conveying chain are damaged, and even the personal safety of operators is damaged, and a steel slag splashing prevention device 7 is preferably arranged between the converter and the cast slag bucket and used for preventing the heat loss in the process of pouring the converter slag into the cast slag bucket and reducing adverse effects on equipment and personnel.
In a preferred embodiment, the steel slag splashing prevention device 7 is a trapezoidal funnel structure with a wide upper part and a narrow lower part. The converter slag falls into the slag casting hopper from the lower opening of the trapezoidal funnel structure through the upper opening of the trapezoidal funnel structure along the inner wall of the trapezoidal funnel structure, and splashing of the converter slag is effectively prevented.
As a preferred embodiment, as shown in fig. 4, the trapezoid funnel structure 7 is enclosed by a splash guard 71, and a hydraulic cylinder 72 for preventing converter slag from adhering to the inner wall of the splash guard is mounted on at least one side wall of the splash guard, the hydraulic cylinder 72 is mounted on the outer wall of the splash guard, and a mounting hole 74 is formed on the outer wall of the splash guard at a position corresponding to the hydraulic cylinder.
In a preferred embodiment, the fixed end of the hydraulic cylinder 72 is fixedly installed at the edge of the splash guard outer wall installation hole 74 through a cylinder body 73, and the top of the hydraulic cylinder 72 is located inside the installation hole 74. During operation, the hydraulic top cylinder top head is used for carrying out high-frequency impact in the mounting hole to form vibration, so that converter slag on the inner wall of the splash-proof guard plate falls off from the surface of the splash-proof guard plate, and the converter slag is prevented from being adhered to the inner wall of the splash-proof guard plate.
In a preferred embodiment, the splash guard 71 comprises a corrosion-resistant stainless steel plate 711, a heat-insulating cotton 712 and a protective galvanized plate 713 from inside to outside, wherein the thickness of the corrosion-resistant stainless steel plate is preferably 30mm.
The embodiment also provides a power generation method of the converter slag heat-taking power generation system, which comprises the following steps:
step one, dumping the converter to enable the slag to fall into a slag casting hopper, and casting the slag into a blocky slag block;
secondly, the casting slag hopper enters a waste heat recovery boiler under the conveying action of a casting slag hopper conveying system;
step three, when the slag blocks pass through a converter slag steam Rankine cycle power generation system in movement, heat is conducted to a waste heat boiler tube by utilizing radiation heat transfer, so that steam with higher temperature is directly generated for power generation;
and step four, heating the air of the waste heat recovery boiler by utilizing the slag blocks to form hot air, and conveying the hot air to a converter slag thermal semiconductor temperature difference power generation system for power generation. In the actual operation process, the system can be built under a plurality of converter furnaces and run in parallel, the problem that intermittent deslagging of the converters affects unstable operation of vapor pressure is solved, and stable operation of a power generation system is guaranteed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a prevent slag device that splashes, its characterized in that, prevent that slag device that splashes is narrow trapezoidal funnel structure down for wide, trapezoidal funnel structure is enclosed by the splashproof backplate, installs the hydraulic pressure top jar that is used for preventing the converter slag adhesion on splashproof backplate inner wall on its at least one side lateral wall.
2. The steel slag splashing prevention device as claimed in claim 1, wherein the hydraulic top cylinder is installed on the outer wall of the splash guard, and a mounting hole is formed on the outer wall of the splash guard at a position corresponding to the hydraulic top cylinder.
3. The device for preventing steel slag from splashing as claimed in claim 2, wherein the fixed end of the hydraulic cylinder is fixedly installed at the edge of the installation hole on the outer wall of the splash-proof guard plate through a cylinder-jacking seat, and the hydraulic cylinder-jacking head is located inside the installation hole.
4. The device for preventing steel slag from splashing as claimed in claim 3, wherein the top cylinder seat body is fixedly installed at the edge of the installation hole through a bolt and a nut.
5. The device for preventing steel slag from splashing according to claim 1, wherein the splash-proof guard plate comprises a corrosion-resistant stainless steel plate, heat-insulating cotton and a protective galvanized plate from inside to outside.
6. The device for preventing steel slag from splashing according to claim 5, wherein the corrosion-resistant stainless steel plate has a thickness of 30mm.
7. The converter slag heat-taking power generation system is characterized by comprising the steel slag splashing prevention device according to any one of claims 1 to 6, a cast slag hopper, a waste heat recovery boiler and a cast slag hopper conveying system for circularly conveying the cast slag hopper between the position right below a converter and the waste heat recovery boiler, wherein the steel slag splashing prevention device is positioned between the converter and the cast slag hopper.
8. The converter slag heat-extraction power generation system according to claim 7, wherein a converter slag steam Rankine cycle power generation system and a converter slag thermal semiconductor temperature difference power generation system are sequentially arranged in the waste heat recovery boiler along the conveying direction of the cast slag hopper, and a cooling air inlet is formed in a side wall of the waste heat recovery boiler.
9. The converter slag thermal power generation system of claim 8, wherein the converter slag steam Rankine cycle power generation system is located in the heat recovery boiler directly above the slag hopper near the inlet.
10. The converter slag heat-extraction power generation system according to claim 9, wherein the converter slag steam Rankine cycle power generation system comprises a waste heat boiler tube, a water inlet of the waste heat boiler tube is connected with a water outlet of the condenser, a water outlet of the waste heat boiler tube is connected with the steam turbine power generation system, and a steam pocket is further arranged between the waste heat boiler tube and the steam turbine power generation system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220883450.XU CN217578967U (en) | 2022-04-16 | 2022-04-16 | Steel slag splashing prevention device and converter slag heat-taking power generation system adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220883450.XU CN217578967U (en) | 2022-04-16 | 2022-04-16 | Steel slag splashing prevention device and converter slag heat-taking power generation system adopting same |
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| CN217578967U true CN217578967U (en) | 2022-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727653A (en) * | 2023-08-15 | 2023-09-12 | 联峰钢铁（张家港）有限公司 | Ladle slag basin replacing device in continuous casting |
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2022
- 2022-04-16 CN CN202220883450.XU patent/CN217578967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727653A (en) * | 2023-08-15 | 2023-09-12 | 联峰钢铁（张家港）有限公司 | Ladle slag basin replacing device in continuous casting |
| CN116727653B (en) * | 2023-08-15 | 2023-10-20 | 联峰钢铁（张家港）有限公司 | Ladle slag basin replacing device in continuous casting |
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