CN210036225U - Large-scale electric arc furnace dust pelletizing system - Google Patents
Large-scale electric arc furnace dust pelletizing system Download PDFInfo
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- CN210036225U CN210036225U CN201920837081.9U CN201920837081U CN210036225U CN 210036225 U CN210036225 U CN 210036225U CN 201920837081 U CN201920837081 U CN 201920837081U CN 210036225 U CN210036225 U CN 210036225U
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Abstract
The utility model discloses a large-scale electric arc furnace dust pelletizing system, including a smoke and dust entrapment device, secondary smoke and dust entrapment device, cubic smoke and dust entrapment device, mixing drum, dirt gas separator, aiutage and connect the pipeline between each device, a smoke and dust entrapment device links to each other with electric arc furnace shaft smoke and dust export, secondary smoke and dust entrapment device erects in the electric arc furnace top, cubic smoke and dust entrapment device set up in secondary smoke and dust entrapment device top. The system can collect and purify all smoke dust generated in the production process of the large-scale electric arc furnace, meets the environmental protection requirement of the electric arc furnace production, and the smoke dust collection rate, the dust emission concentration, the electric arc furnace platform post dust concentration, the dioxin emission concentration and the like all meet the national standard requirements.
Description
Technical Field
The utility model relates to a dust pelletizing system especially relates to large-scale electric arc furnace dust pelletizing system.
Background
An electric arc furnace is an electric furnace that utilizes the high temperature produced by an electrode arc to melt ores and metals. When the gas discharge forms an electric arc, the energy is concentrated, and the temperature of the arc area is more than 3000 ℃. For smelting metal, the electric arc furnace has greater process flexibility than other steel furnaces, can effectively remove impurities such as sulfur, phosphorus and the like, has easily controlled furnace temperature and small equipment floor area, and is suitable for smelting high-quality alloy steel.
The electric arc furnace can produce a large amount of smoke dust in the smelting process, and the smoke dust collecting effect of the smoke dust collecting system device matched with the existing large electric arc furnace is poor, and the requirements of the environmental protection policy of China cannot be met, so that a new dust collecting system needs to be researched and developed urgently to solve the problems.
Disclosure of Invention
The utility model aims at providing a large-scale electric arc furnace dust pelletizing system, this system can the entrapment purify the whole smoke and dust that produce in the large-scale electric arc furnace production process, satisfy the environmental protection demand of electric arc furnace production, and its smoke and dust entrapment rate, dust emission concentration, electric arc furnace platform post dust concentration, dioxin emission concentration etc. all satisfy the national standard requirement.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the large-scale electric arc furnace dust removal system comprises a primary smoke dust collecting device, a secondary smoke dust collecting device, a tertiary smoke dust collecting device, a mixing cylinder, a dust-gas separating device, an exhaust cylinder and pipelines connected among the devices,
the primary smoke dust collecting device is used for smoke dust collection and dioxin treatment, one end of the primary smoke dust collecting device is connected with a smoke dust outlet of a vertical shaft of the electric arc furnace, and the other end of the primary smoke dust collecting device is connected with the mixing cylinder;
the secondary smoke dust collecting device is used for collecting smoke dust, is erected above the electric arc furnace, and is connected with the mixing cylinder at an outlet;
the third smoke and dust collecting device is used for collecting smoke and dust and arranged above the second smoke and dust collecting device;
the mixing cylinder is used for mixing the smoke dust in the primary smoke dust collecting device, the secondary smoke dust collecting device and the tertiary smoke dust collecting device, the inlet end of the mixing cylinder is communicated with the primary smoke dust collecting device, the secondary smoke dust collecting device and the tertiary smoke dust collecting device, and the outlet end of the mixing cylinder is communicated with the dust-gas separating device;
the dust-gas separation device is used for separating dust and gas, collecting the dust and discharging the gas;
the exhaust funnel is connected with the dust-gas separation device and discharges the treated gas.
In the technical scheme, the primary smoke dust collecting device sequentially comprises a secondary combustion tower, a combustion settling chamber, an evaporative cooling tower, an evaporation settling chamber and a first fan station according to the process flow, wherein the inlet end of the secondary combustion tower is connected with the smoke dust outlet of the vertical shaft of the electric arc furnace, the evaporation settling chamber is connected with the mixing cylinder through a primary pipeline, and the first fan station is arranged on the primary pipeline.
In the technical scheme, the secondary smoke dust collecting device comprises a rail beam system and a cover body, the cover body comprises a fixed cover and a movable cover, the fixed cover is connected with the movable cover in a clamping mode, a walking structure is arranged at the bottom end of the movable cover and matched with the rail beam system, the walking structure drives the movable cover to move horizontally, the fixed cover comprises a fixed cover body and a smoke exhaust pipe arranged above the fixed cover body, and the smoke exhaust pipe is communicated with an inner cavity of the cover body.
In the technical scheme, the smoke exhaust pipe is connected with the mixing cylinder through a secondary pipeline.
In the above technical scheme, the tertiary soot capturing device is a roof large cover, the roof large cover is connected with a tertiary pipeline through a plurality of branch pipes, the tertiary pipeline is connected with the secondary pipeline, and the tertiary pipeline is connected with the mixing drum through the secondary pipeline.
In the above technical scheme, the dust and gas separation device comprises a mixed air inlet pipe, an air source processing system, a pulse bag dust collector and an exhaust pipe, wherein the pulse bag dust collector is arranged at the bottom end of the dust and gas separation device and used for collecting dust, and the exhaust pipe is used for connecting the dust and gas separation system and the exhaust funnel.
In the technical scheme, the exhaust pipe is provided with the second fan station.
In the above technical solution, the dust removing system further comprises a control system, and the control system is used for controlling the operation parameters of the device in the dust removing system of the large-scale electric arc furnace.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the utility model discloses in be provided with once smoke and dust entrapment device, secondary smoke and dust entrapment device and cubic smoke and dust entrapment device, once smoke and dust entrapment device links to each other with electric arc furnace shaft smoke and dust export, secondary smoke and dust entrapment device erects in the electric arc furnace top, and cubic smoke and dust entrapment device sets up in secondary smoke and dust entrapment device top, guarantees the whole smoke and dust that produce in the large-scale electric arc furnace production process of entrapment, improves the smoke and dust entrapment rate by a wide margin, reduces electric arc furnace platform post dust concentration, satisfies the requirement of national safety and sanitation criteria.
2. The primary smoke dust collecting device comprises a secondary combustion tower, a combustion settling chamber, an evaporative cooling tower, a vaporization settling chamber and a first fan station in sequence according to the process flow, wherein smoke dust collected by the primary smoke dust collecting device is heated to a temperature higher than 800 ℃ in the secondary combustion tower, so that dust is separated from gas, the dust enters the combustion settling chamber to be settled, the gas enters the evaporative cooling tower to be rapidly cooled to a temperature of 250 ℃, enters the vaporization settling chamber, and dioxin in the smoke dust is treated by utilizing secondary combustion and emergency bath cooling design, so that the emission concentration of the dioxin is reduced, and the national standard is met.
3. Secondary smoke and dust entrapment device erects in the electric arc furnace top, and it includes the rail beam system and covers the body, and the cover body is connected with removal cover including fixed cover, removes the cover bottom and is equipped with the walking structure, and the walking structure cooperatees with the rail beam system, has the degree of freedom that drives removal cover horizontal migration, consequently, when guaranteeing smoke and dust entrapment rate, effective control electric arc furnace platform post dust concentration, makes things convenient for the maintenance and the maintenance of electric arc furnace.
4. The first fan station is arranged on the primary pipeline, the operation requirement of the electric arc furnace can be combined, the pressure in the electric arc furnace is controlled by changing the rotating speed of the fan, and the scrap steel preheating effect is improved.
5. The dust-gas separation device comprises a mixed air inlet pipe, an air source processing system, a pulse bag-type dust remover and an exhaust pipe, and the pulse bag-type dust remover is used for realizing the ultralow emission standard and meeting the national dust emission standard.
6. The large-scale electric arc furnace dust removal system further comprises a control system, the control system adopts a Siemens PLC, the Ethernet communication is carried out between the optical fiber and the electric arc furnace, the operation parameters of the dust removal system are adjusted in real time by combining the operation condition of the electric arc furnace, the energy is saved, the consumption is reduced and the cost is saved on the premise of ensuring the environmental protection requirement.
Drawings
FIG. 1 is a schematic structural diagram of a dust removal system of a large-scale electric arc furnace.
Wherein: 1. a primary soot trapping device; 2. a secondary soot trapping device; 3. a third smoke dust collecting device; 4. a mixing drum; 5. a dust-gas separation device; 6. an exhaust funnel; 7. a secondary combustion tower; 8. a combustion settling chamber; 9. an evaporative cooling tower; 10. a vaporization settling chamber; 11. a first fan station; 12. a rail-beam system; 13. a movable cover; 14. a fixed cover body; 15. a smoke exhaust pipe; 16. a secondary pipeline; 17. a third pipeline; 18. a mixed air inlet pipe; 19. an air source treatment system; 20. a pulse bag dust collector; 21. an exhaust pipe; 22. a second fan station.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
the first embodiment is as follows:
referring to fig. 1, the large-scale electric arc furnace dust removal system comprises a primary smoke dust collecting device 1 for collecting smoke dust and treating dioxin, a secondary smoke dust collecting device 2 and a tertiary smoke dust collecting device 3 for improving smoke dust collecting efficiency, a mixing cylinder 4 for mixing collected smoke dust, a dust-gas separating device 5, an exhaust cylinder 6 and pipelines for connecting the devices, wherein one end of the primary smoke dust collecting device 1 is connected with a smoke dust outlet of a shaft of the electric arc furnace, and the other end of the primary smoke dust collecting device 1 is connected with the mixing cylinder 4; the secondary smoke dust collecting device 2 is erected above the electric arc furnace, and the outlet of the secondary smoke dust collecting device is connected with the mixing cylinder 4; the third smoke and dust collecting device 3 is arranged above the second smoke and dust collecting device 2;
the mixing cylinder 4 is used for mixing the smoke dust in the primary smoke dust collecting device 1, the secondary smoke dust collecting device 2 and the tertiary smoke dust collecting device 3, the inlet end of the mixing cylinder 4 is communicated with the primary smoke dust collecting device 1, the secondary smoke dust collecting device 2 and the tertiary smoke dust collecting device 3, and the outlet end of the mixing cylinder is communicated with the dust-gas separating device 5;
the dust-gas separation device 5 is used for separating dust and gas, collecting the dust and discharging the gas;
the exhaust funnel 6 is connected with the dust-gas separation device 5 and discharges the treated gas.
By utilizing the large-scale electric arc furnace dust removal system, the dust collection rate is ensured to be more than 96 percent, and the dust emission concentration is less than 10mg/m3And meets the requirements of national safety and sanitation standards.
Example two:
in the second embodiment, the following structural features are added to the structure of the second embodiment on the basis of keeping the same with the first embodiment:
referring to FIG. 1, in order to solve the problem of dioxin in smoke, the dioxin emission concentration is less than 0.1 ng TEQ/Nm3The primary smoke dust collecting device 1 adopts the design of secondary combustion and quick bath cooling, and comprises a secondary combustion tower 7, a combustion settling chamber 8, an evaporative cooling tower 9, a vaporization settling chamber 10 and a first fan station 11, wherein the inlet end of the secondary combustion tower 7 is connected with a smoke dust outlet of a vertical shaft of an electric arc furnace, smoke dust is heated to a temperature higher than 800 ℃ in the secondary combustion tower 7, dust is at the bottom of the combustion settling chamber 8, gas moves upwards to the evaporative cooling tower 9 and is rapidly cooled to 250 ℃, the vaporization settling chamber 10 is connected with the mixing cylinder 4 through a primary pipeline, the first fan station 11 is arranged on the primary pipeline, and the rotating speed of a fan is changed to control the inside of the furnace according to the operation requirement of the electric arc furnace, so that the waste steel preheating effect is improved.
Example three:
in the third embodiment, on the basis of keeping the same as the first embodiment, the following structural features are added:
referring to fig. 1, in order to ensure the dust collection rate and effectively control the dust concentration of the electric arc furnace platform, a secondary dust collection device 2 and a tertiary dust collection device 3 are sequentially arranged above the electric arc furnace.
Because secondary smoke and dust entrapment device 2 sets up in the electric arc furnace top, consequently for the maintenance and the maintenance of later stage electric arc furnace, secondary smoke and dust entrapment device 2 includes rail beam system 12 and the cover body, the cover body is including fixed cover and removal cover 13, fixed cover with remove cover 13 block and connect, it is equipped with walking structure to remove cover 13 bottom, walking structure with rail beam system 12 cooperatees, has the drive remove 13 horizontal migration's degree of freedom of cover, when fixed cover is in the detached state with removal cover 13, can maintain and overhaul the electric arc furnace below, fixed cover including fixed cover body 14 and set up in the pipe 15 of discharging fume of fixed cover body 14 top, discharge fume the pipe 15 with cover internal cavity is linked together, discharge fume pipe 15 through secondary pipeline 16 with mixing drum 4 links to each other.
The third smoke dust collecting device 3 is arranged above the second smoke dust collecting container 2, the third smoke dust collecting device 3 is a roof large cover, the roof large cover is connected with a third pipeline 17 through a plurality of branch pipes, the third pipeline 17 is connected with the second pipeline 16, and the third pipeline 17 is connected with the mixing cylinder 4 through the second pipeline 16.
The smoke dust in the primary smoke dust collecting device 1 enters a mixing cylinder 4 through a primary pipeline, the smoke dust in the secondary smoke dust collecting device 2 and the smoke dust in the tertiary smoke dust collecting device 3 enter the mixing cylinder 4 through the confluence of a secondary pipeline 16 and a tertiary pipeline 17, the mixed smoke dust is cooled to 100 ℃ in the mixing cylinder 4, and then the mixed smoke dust enters a dust-gas separating device 5 through a mixed air inlet pipe 18 to separate dust and gas.
The dust-gas separation device 5 comprises a mixed air inlet pipe 18, an air source processing system 19, a pulse bag-type dust collector 20 and an exhaust pipe 21, wherein the pulse bag-type dust collector 20 is arranged at the bottom end of the dust-gas separation device 5 and used for collecting dust and realizing ultra-low emission standard so as to meet national dust emission standard, the exhaust pipe 21 is used for connecting the dust-gas separation system and the exhaust funnel 6, and a second fan station 22 is arranged on the exhaust pipe 21.
The dust-gas separation device 5 further comprises a control system, and the control system is used for controlling the operation parameters of the device in the large-scale electric arc furnace dust removal system, so that the device can save energy, reduce consumption and save cost on the premise of ensuring the environmental protection requirement.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. Large-scale electric arc furnace dust pelletizing system, its characterized in that: comprises a primary smoke dust collecting device, a secondary smoke dust collecting device, a tertiary smoke dust collecting device, a mixing cylinder, a dust-gas separating device, an exhaust cylinder and pipelines connecting the devices,
the primary smoke dust collecting device is used for smoke dust collection and dioxin treatment, one end of the primary smoke dust collecting device is connected with a smoke dust outlet of a vertical shaft of the electric arc furnace, and the other end of the primary smoke dust collecting device is connected with the mixing cylinder;
the secondary smoke dust collecting device is used for collecting smoke dust, is erected above the electric arc furnace, and is connected with the mixing cylinder at an outlet;
the third smoke and dust collecting device is used for collecting smoke and dust and arranged above the second smoke and dust collecting device;
the mixing cylinder is used for mixing the smoke dust in the primary smoke dust collecting device, the secondary smoke dust collecting device and the tertiary smoke dust collecting device, the inlet end of the mixing cylinder is communicated with the primary smoke dust collecting device, the secondary smoke dust collecting device and the tertiary smoke dust collecting device, and the outlet end of the mixing cylinder is communicated with the dust-gas separating device;
the dust-gas separation device is used for separating dust and gas, collecting the dust and discharging the gas;
the exhaust funnel is connected with the dust-gas separation device and discharges the treated gas.
2. The large electric arc furnace dusting system of claim 1, wherein: the primary smoke dust collecting device sequentially comprises a secondary combustion tower, a combustion settling chamber, an evaporative cooling tower, a vaporization settling chamber and a first fan station according to the process flow, wherein the inlet end of the secondary combustion tower is connected with a smoke dust outlet of a vertical shaft of the electric arc furnace, the vaporization settling chamber is connected with the mixing cylinder through a primary pipeline, and the first fan station is arranged on the primary pipeline.
3. The large electric arc furnace dusting system of claim 1, wherein: the secondary smoke and dust trapping device comprises a rail beam system and a cover body, the cover body comprises a fixed cover and a movable cover, the fixed cover is connected with the movable cover in a clamping mode, a walking structure is arranged at the bottom end of the movable cover, the walking structure is matched with the rail beam system and has the freedom degree of driving the movable cover to move horizontally, the fixed cover comprises a fixed cover body and a smoke exhaust pipe arranged above the fixed cover body, and the smoke exhaust pipe is communicated with an inner cavity of the cover body.
4. A large electric arc furnace dusting system according to claim 3, characterized in that: the smoke exhaust pipe is connected with the mixing cylinder through a secondary pipeline.
5. The large electric arc furnace dusting system of claim 4, wherein: the tertiary smoke dust catching device is a roof large cover, the roof large cover is connected with a tertiary pipeline through a plurality of branch pipes, and the tertiary pipeline is connected with the secondary pipeline and is connected with the mixing cylinder through the secondary pipeline.
6. The large electric arc furnace dusting system of claim 1, wherein: the dust-gas separation device comprises a mixed air inlet pipe, an air source processing system, a pulse bag-type dust collector and an exhaust pipe, wherein the pulse bag-type dust collector is arranged at the bottom end of the dust-gas separation device and used for collecting dust, and the exhaust pipe is used for connecting the dust-gas separation system and the exhaust funnel.
7. The large electric arc furnace dusting system of claim 6, wherein: and a second fan station is arranged on the exhaust pipe.
8. The large electric arc furnace dusting system of claim 1, wherein: the control system is used for controlling the operation parameters of the device in the large-scale electric arc furnace dust removal system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920837081.9U CN210036225U (en) | 2019-06-04 | 2019-06-04 | Large-scale electric arc furnace dust pelletizing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920837081.9U CN210036225U (en) | 2019-06-04 | 2019-06-04 | Large-scale electric arc furnace dust pelletizing system |
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| CN210036225U true CN210036225U (en) | 2020-02-07 |
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| CN201920837081.9U Active CN210036225U (en) | 2019-06-04 | 2019-06-04 | Large-scale electric arc furnace dust pelletizing system |
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