CN210220708U - Scrap steel preheating system - Google Patents
Scrap steel preheating system Download PDFInfo
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- CN210220708U CN210220708U CN201920611896.5U CN201920611896U CN210220708U CN 210220708 U CN210220708 U CN 210220708U CN 201920611896 U CN201920611896 U CN 201920611896U CN 210220708 U CN210220708 U CN 210220708U
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- cover body
- preheating
- gas
- horizontal conveyor
- scrap steel
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to a scrap steel preheating system, which comprises a hoisting device, a control system and a horizontal conveyor, wherein the horizontal conveyor comprises a feeding section and a preheating section, the preheating section is provided with a baking device, and the baking device is provided with a cover body covering the upper part of the horizontal conveyor; a plurality of groups of preheating assemblies penetrate through two sides of the cover body, each group of preheating assemblies comprises a plurality of smoke outlets and two burners symmetrically arranged above the two sides of the cover body, and the burners are supplied with gas and oxygen by gas pipelines and air pipelines outside the cover body; the smoke outlet is connected with a draught fan through a smoke exhaust pipeline; and a heat exchanger is arranged at the intersection of the smoke exhaust pipeline and the gas pipeline and the air pipeline so as to preheat gas and air by using high-temperature smoke. The utility model discloses can realize preheating the limit transportation limit of steel scrap, flame stability is good, preheats efficiently, and the programming rate is fast, makes the production link furthest utilize the steel scrap resource, has realized the energy saving and emission reduction of steel smelting link.
Description
Technical Field
The utility model relates to a metallurgical technology field, specific scrap steel system of preheating that says so.
Background
Steelmaking manufacturers are always dedicated to the improvement of steelmaking process, and the application of scrap steel preheating process in steel production has important significance for saving energy, reducing consumption and lowering cost of steel per ton. The existing scrap steel preheating device is generally applied to preheating occasions of a scrap steel hopper (material basket) and other fixed hopper type and bin type scrap steel containers.
In the prior art, a scrap steel preheating device matched with an electric arc furnace is designed, but due to the limitation of sites and equipment, the device is only suitable for preheating steel making of the electric arc furnace and cannot be suitable for other smelting furnace equipment or preheating scrap steel at other uses.
Besides, also there is some independent device that relevant steel scrap preheated among the prior art, for example, application number 2018120143164.3's utility model discloses a melting device is preheated in advance to two furnace chambeies of symmetry, this utility model utilizes two furnace chambers to preheat in turn, let in another furnace chamber with exhaust high temperature waste gas when a furnace chamber melts the steel scrap and utilize waste gas to preheat steel scrap wherein, two furnace chambers can not melt the steel scrap simultaneously, the steel scrap preheats inefficiency slow, and only be equipped with a nozzle in every furnace chamber, and do not set up the flame detector, the burning condition of unable real-time detection flame, if flame extinguishes suddenly then can't accomplish the steel scrap and preheat.
In summary, the existing scrap iron preheating technology has a plurality of defects: low scrap steel preheating efficiency, slow discharging speed, poor flame stability and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a scrap steel system of preheating can realize carrying out the limit transportation to the scrap steel and preheating simultaneously, preheats efficiently, and flame stability is good, has realized the energy saving and emission reduction of steel smelting link.
For realizing the above technical purpose, the utility model discloses a technical scheme be: a scrap steel preheating system comprises a horizontal conveyor for conveying scrap steel, a hoisting device for hoisting the scrap steel on the horizontal conveyor and a control system for controlling the horizontal conveyor and the hoisting device, wherein the horizontal conveyor is sequentially divided into a feeding section and a preheating section along the conveying direction of the horizontal conveyor, a baking device is arranged above the preheating section, the baking device is provided with a cover body covering the upper part of the horizontal conveyor, the cover body is provided with a plurality of groups of preheating assemblies along the conveying direction of the scrap steel, and each group of preheating assemblies comprises a plurality of smoke outlets and two burners symmetrically arranged above two sides of the cover body; an included angle of 60-90 degrees is formed between the two burners, so that flameout is prevented by mutual ignition between the burners, and the burners are supplied with gas and oxygen through a gas pipeline and an air pipeline outside the cover body; the smoke outlet is connected with an induced draft fan through a smoke exhaust pipeline so as to utilize the induced draft fan to exhaust smoke in the smoke exhaust pipeline; and a heat exchanger is arranged at the intersection of the smoke exhaust pipeline and the gas pipeline and the air pipeline so as to preheat the gas and the air in advance by utilizing the heat exchange among the high-temperature smoke, the gas and the air.
As the utility model discloses scrap steel preheats further optimization of system: the baking device is fixed or lifting.
As the utility model discloses scrap steel preheats further optimization of system: the internal portion of the cover builds refractory material by laying bricks or stones, installs the thermoscope on the cover to real-time supervision toasts the temperature, and the cover both sides are equipped with the observation window in the nozzle below correspondence.
As the utility model discloses scrap steel preheats further optimization of system: the burner top is equipped with automatic igniter and flame detector to carry out signal connection with control system, in order to ensure the continuous burning of nozzle.
As the utility model discloses scrap steel preheats further optimization of system: the cover body is supported and fixed by upright posts arranged on two sides of the horizontal conveyor, and a gap is formed between the cover body and the horizontal conveyor, so that the horizontal conveyor does not contact with the cover body when in operation.
As the utility model discloses scrap steel preheats further optimization of system: the smoke exhaust port is arranged at the top of the cover body and on two sides of the horizontal conveyor.
As the utility model discloses scrap steel preheats further optimization of system: and the gas pipeline and the air pipeline are provided with a gas quick-cutting valve, a pressure transmitter and an electric/pneumatic regulating valve.
As the utility model discloses scrap steel preheats further optimization of system: the air outlet of the induced draft fan is connected with a flue gas treatment device.
Advantageous effects
One, the utility model discloses the nozzle is 60~90 degrees contained angle symmetry settings in the steel scrap preheating system, and two nozzles are each other supplementary, especially using low heat value gas such as blast furnace gas, and burning initial stage flame is unstable, even a nozzle extinguishes, another nozzle can ignite it, and two nozzles can play anti-flameout effect mutually, and the guarantee nozzle can the sustained combustion, and flame stability is good, can effectually realize the rapid heating up of steel scrap.
Two, the utility model discloses scrap steel system of preheating is equipped with a plurality of exhaust ports in cover body top and horizontal conveyor both sides, and the exhaust port links to each other with the draught fan through the pipeline of discharging fume, forms little negative pressure at the internal portion of cover, and the internal flue gas of exhaust hood that can high efficiency makes the air be full of the cover body, assists the nozzle burning.
Three, the utility model discloses be equipped with the heat exchanger in the steel scrap preheating system and be located the intersection of discharging fume pipeline, gas trunk line and air trunk line, the high temperature waste gas of discharging fume the pipeline gets into the heat exchanger, carries out the heat exchange with baking equipment's gas and air in the heat exchanger, and high temperature waste gas temperature reduces, and gas and air temperature rise. The waste gas after the cooling gets into flue gas processing apparatus, and the gas and the air after preheating get into baking equipment's the internal burning that covers, make full use of high temperature waste gas, greatly practiced thrift the energy, and the gas and the air after preheating participate in the burning simultaneously, have improved combustion temperature and combustion stability, have improved scrap steel and have preheated efficiency.
Four, the utility model discloses control system includes PLC in the steel scrap preheating system, data receiving module, processing module, control module and alarm module, data receiving module receives the flowmeter among the control system, pressure transmitter, the flame detector, the information of thermoscope, processing module carries out analysis processes to information, and make adjustment command by control module and carry out regulation control to corresponding device like electricity/pneumatic control valve, the gas fast-cutting valve, automatic ignition ware etc. realize automatic control, as required automatically regulated flame size, avoid the big fire always to toast extravagant energy.
Fifthly, the utility model discloses be equipped with the multiunit in the steel scrap system of preheating and preheat the subassembly, realize preheating the work to the steel scrap in the transportation, preheat efficiently, ejection of compact is fast.
Drawings
FIG. 1 is an overall schematic view of a scrap preheating system according to the present invention;
FIG. 2 is a schematic structural view of a preheating assembly of the scrap steel preheating system of the present invention;
FIG. 3 is a schematic structural view of the baking device of the scrap steel preheating system of the present invention.
The labels in the figure are: 1. the device comprises a hoisting device, 2, a horizontal conveyor, 201, a feeding section, 202, a preheating section, 3, a baking device, 301, a cover body, 302, a burner, 303, a smoke exhaust port, 304, a gas pipeline, 305, an air pipeline, 306, a stand column, 307, an induced draft fan, 308, a smoke exhaust pipeline, 309, a heat exchanger, 310, an observation window, 311 and a gas quick-cutting valve.
Detailed Description
The invention is further explained below with reference to the examples and the figures.
Example 1
A scrap steel preheating system is shown in figures 1 and 2 and comprises a horizontal conveyor 2 used for transporting scrap steel, a hoisting device 1 used for hoisting the scrap steel on the horizontal conveyor 2 and a control system used for controlling the horizontal conveyor 2 and the hoisting device 1, wherein the hoisting device 1 is used for adding the scrap steel on the horizontal conveyor 2, the scrap steel is enabled to be more uniformly paved on a feeding section 201 through the operation of the horizontal conveyor 2, and a material pressing and leveling device can be configured if necessary, so that the scrap steel can be more uniformly distributed. The horizontal conveyor 2 is sequentially divided into a feeding section 201 and a preheating section 202 along the conveying direction of the horizontal conveyor, wherein a baking device 3 is arranged above the preheating section 202, the baking device 3 is provided with a cover body 301 covering the horizontal conveyor 2, the cover body 301 is provided with a plurality of groups of preheating components along the scrap conveying direction, and each group of preheating components comprises a plurality of smoke outlets 303 and burners 302 symmetrically arranged above two sides of the cover body 301; the burners 302 are included angles of 60-90 degrees, so that mutual ignition between the burners 302 is utilized to prevent flameout, the two burners 302 are mutually supplemented, especially when low-calorific-value gas such as blast furnace gas is used, flame is unstable in the initial stage of combustion, even if one burner 302 is extinguished, the other burner 302 can be ignited, the two burners 302 can mutually play a role in flameout prevention, the flame stability is good, and the rapid heating of scrap steel can be effectively realized.
The burner 302 is supplied with gas and oxygen by a gas pipeline 304 and an air pipeline 305 outside the cover body 301; after the scrap steel is conveyed into the preheating section 202, the burners 302 arranged in the cover body 301 directly heat the scrap steel in transportation, so that the discharging speed is high, and the preheating efficiency is high.
As shown in fig. 3, the smoke outlet 303 is disposed at the top of the hood 301 and at two sides of the horizontal conveyor 2, and is connected to the induced draft fan 307 through the smoke exhaust pipeline 308, so as to draw out the smoke in the smoke exhaust pipeline 308 by using the induced draft fan 307; smoke exhaust pipe 308 forms little negative pressure in the cover body 301 inside through draught fan 307, and the high temperature waste gas that produces when will toasting is in time taken out, and draught fan 307 air outlet is connected with smoke treatment device in addition to carry out purification treatment to the waste gas of taking out, avoid causing environmental pollution.
The smoke exhaust pipeline 308 is provided with a heat exchanger 309 at the junction of the gas pipeline 304 and the air pipeline 305, so as to pre-heat the gas and the air in advance by using the heat exchange between the high-temperature smoke and the gas and the air. The high-temperature exhaust gas in the exhaust pipe 308 enters the heat exchanger 309, and exchanges heat with the fuel gas and air in the baking device 3 in the heat exchanger 309, so that the temperature of the high-temperature exhaust gas is reduced, and the temperature of the fuel gas and air is increased. The preheated gas and air enter the cover body 301 of the baking device 3 to be combusted, high-temperature waste gas is fully utilized, energy is greatly saved, the preheated gas and air participate in combustion, the combustion temperature and the combustion stability are improved, and the scrap steel preheating efficiency is improved.
The baking device 3 can adopt a fixed type or a lifting type, and the height of the baking device 3 can be adjusted through the lifting type to adapt to different requirements.
The internal portion of cover 301 builds by laying bricks or stones is able to be pouring material, also can be refractory fiber or other refractory material, can effectively realize thermal-insulated heat retaining effect, installs the thermoscope on the cover body, can last the temperature measurement to scrap steel in the horizontal conveyor 2, realizes the real time monitoring to the scrap steel temperature. The viewing windows 310 are correspondingly arranged on the two sides of the cover body 301 below the burner 302, so that the flame and the waste steel baking condition can be conveniently observed, and if the flame combustion state is found to be abnormal, the adjustment can be timely carried out.
In order to ensure the stability of flame, an automatic igniter and a flame detector are arranged at the top end of the burner 302 and are in signal connection with a control system so as to ensure the continuous combustion of the burner 302.
In order to fix the cover 301, the cover 301 is supported and fixed by the pillars 306 disposed on both sides of the horizontal conveyor 2, and a gap is formed between the cover 301 and the horizontal conveyor 2, so that the horizontal conveyor 2 does not contact the cover 301 during operation, and the cover 301 has heat preservation and insulation effects.
The gas pipeline 304 and the air pipeline 305 are provided with a thermometer, a gas fast-switching valve 311, a pressure transmitter and an electric/pneumatic regulating valve, the state of gas in the pipeline is inquired in time through the detection of the temperature and the pressure of the gas pipeline 304 and the air pipeline 305, and the gas fast-switching valve and the electric/pneumatic regulating valve are controlled to regulate when necessary, so that safe and effective preheating is realized. The control system comprises a data receiving module, a processing module, a control module and an alarm module. The data receiving module in the control system receives information of the flowmeter, the pressure transmitter, the flame detector and the temperature detector, the processing module analyzes and processes the information, and the control module makes an adjusting instruction to adjust and control corresponding devices such as an electric/pneumatic adjusting valve, a gas quick-switching valve and the like, so that automatic control is realized, the size of flame is automatically adjusted as required, and the waste of energy caused by the continuous strong fire baking is avoided.
This embodiment is the best embodiment of the present invention.
Claims (8)
1. The utility model provides a scrap steel system of preheating, is used for hoisting up hoist device (1) and the control system who controls horizontal conveyor (2) and hoist device (1) placed on horizontal conveyor (2) with the scrap steel including horizontal conveyor (2) that are used for transporting the scrap steel, its characterized in that: the horizontal conveyor (2) is sequentially divided into a feeding section (201) and a preheating section (202) along the conveying direction of the horizontal conveyor, wherein a baking device (3) is arranged above the preheating section (202), the baking device (3) is provided with a cover body (301) covering the horizontal conveyor (2), the cover body (301) is provided with a plurality of groups of preheating assemblies along the scrap steel conveying direction, and each group of preheating assemblies comprises a plurality of smoke outlets (303) and two burners (302) symmetrically arranged above two sides of the cover body (301); an included angle of 60-90 degrees is formed between the two burners (302) so as to prevent flameout by utilizing mutual ignition between the burners (302), and the burners (302) are provided with gas and oxygen by a gas pipeline (304) and an air pipeline (305) outside the cover body (301); the smoke exhaust port (303) is connected with an induced draft fan (307) through a smoke exhaust pipeline (308) so as to utilize the induced draft fan (307) to exhaust smoke in the smoke exhaust pipeline (308); and a heat exchanger (309) is arranged at the intersection of the smoke exhaust pipeline (308), the gas pipeline (304) and the air pipeline (305) so as to preheat the gas and the air in advance by utilizing the heat exchange among the high-temperature smoke, the gas and the air.
2. The scrap steel preheating system according to claim 1, wherein: the baking device (3) is fixed or lifting.
3. The scrap steel preheating system according to claim 1, wherein: refractory materials are built in the cover body (301), and a temperature detector is arranged on the cover body to monitor the baking temperature in real time; observation windows (310) are correspondingly arranged on the two sides of the cover body (301) below the burner (302).
4. The scrap steel preheating system according to claim 1, wherein: the top end of the burner (302) is provided with an automatic igniter and a flame detector, and is in signal connection with a control system to ensure continuous combustion of the burner (302).
5. The scrap steel preheating system according to claim 1, wherein: the cover body (301) is supported and fixed by upright posts (306) arranged on two sides of the horizontal conveyor (2), and a gap is formed between the cover body (301) and the horizontal conveyor (2) so that the horizontal conveyor (2) does not contact with the cover body (301) when in operation.
6. The scrap steel preheating system according to claim 1, wherein: the smoke exhaust port (303) is arranged at the top of the cover body (301) and on two sides of the horizontal conveyor (2).
7. The scrap steel preheating system according to claim 1, wherein: and a gas quick-cutting valve (311), a pressure transmitter and an electric/pneumatic regulating valve are arranged on the gas pipeline (304) and the air pipeline (305).
8. The scrap steel preheating system according to claim 1, wherein: and an air outlet of the draught fan (307) is connected with a flue gas treatment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611896.5U CN210220708U (en) | 2019-04-30 | 2019-04-30 | Scrap steel preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611896.5U CN210220708U (en) | 2019-04-30 | 2019-04-30 | Scrap steel preheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210220708U true CN210220708U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920611896.5U Expired - Fee Related CN210220708U (en) | 2019-04-30 | 2019-04-30 | Scrap steel preheating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN210220708U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
| CN113528744A (en) * | 2020-04-15 | 2021-10-22 | 河北亚吉工程技术有限公司 | Continuous preheating system for converter scrap steel |
| CN114216335A (en) * | 2021-12-15 | 2022-03-22 | 广州能源检测研究院 | Biomass gasification combustion system and process special for aluminum melting furnace |
-
2019
- 2019-04-30 CN CN201920611896.5U patent/CN210220708U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528744A (en) * | 2020-04-15 | 2021-10-22 | 河北亚吉工程技术有限公司 | Continuous preheating system for converter scrap steel |
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
| CN114216335A (en) * | 2021-12-15 | 2022-03-22 | 广州能源检测研究院 | Biomass gasification combustion system and process special for aluminum melting furnace |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 471800, Shuang Xiang Road 6, Luo Xin industry gathering area, Luoyang, Henan, Xin'an County Patentee after: LUOYANG YALIAN HEAVY TYPE MACHINERY Co.,Ltd. Address before: 471800 No. 1 Guangshen Road, Luoxin Industrial Agglomeration Area, Xin'an County, Luoyang City, Henan Province Patentee before: LUOYANG YALIAN HEAVY TYPE MACHINERY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200331 |