Dust removal system for steel slag rolling and crushing area

Abstract

The utility model discloses a dust removal system for a steel slag rolling and crushing area, which comprises a rolling and crushing chamber, a water mist generating device, a coarse particle separating and returning device, a dust removal pipeline and wet dust removal equipment, and the rolling and crushing chamber is positioned above a rolling and crushing bed and is used for collecting smoke dust generated during rolling and crushing of steel slag; a plurality of water mist generating devices are arranged in the rolling crushing chamber and spray high-speed aerial fog above the rolling vehicle, one side of the top of the rolling crushing chamber is connected with a coarse particle separation and return device, and the side face of the coarse particle separation and return device is connected with wet dust removal equipment through a dust removal pipeline. Coarse particle impurities generated by the coarse particle separation and return device are discharged through the ash discharge chute and return to the rolling and crushing bed again. The problem that flying dust overflows in the existing converter slag grinding and crushing process is solved, the air volume of a dust removal system can be reduced, the operation energy consumption cost of the system is reduced, and therefore the purposes of energy conservation and emission reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steel slag processing technical field especially relates to a steel slag roller compaction crushing area dust removal system. BACKGROUND

[0002] Steel slag is a byproduct in the steel production process, and its output accounts for about 10% of the steel output. Steel slag treatment process is a key factor directly affecting the utilization of steel slag. At present, the pressure hot stew process has developed into the mainstream technology in the field of steel slag primary treatment, and has been applied and popularized in more and more new or expansion projects. The pressure hot stew process mainly includes two steps: roller compaction and hot stew; in the roller compaction process, the steel slag is first roller compacted, after the slag is distributed, the roller compaction vehicle comb tooth roller is back and forth roller compacted, and water is sprayed for cooling at the same time until the steel slag is broken to a maximum particle size of less than 150mm. In the hot stew process, the hot stew slag tank containing the hot broken steel slag is hoisted into the hot stew tank, the water spray valve is opened to spray water to generate steam, and the steam pressure in the hot stew tank is controlled to be stable in a certain range of 0.3-0.35MPa.

[0003] The pressure hot stew process is provided with a wet dust removal system, and the dust-containing steam generated in the roller compaction and hot stew links is purified by a spray tower, a dehydrator and a wet electric dust collector and then discharged into the atmosphere. In the actual production process, a large amount of dust will be generated in the roller compaction link, and if the dust hood is not reasonably designed or the dust collector and pipeline are scaled, the dust removal efficiency will be reduced, and a large amount of dust will still overflow from the dust hood, and the smoke and dust will be dispersed in the workshop, causing great pollution to the surrounding environment and seriously threatening the production and personnel safety.

[0004] Therefore, it is necessary to provide a steel slag roller compaction crushing area dust removal system to efficiently collect and treat the dust generated in the roller compaction process, and finally realize the purpose of clean production. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a steel slag roller compaction crushing area dust removal system, which effectively solves the problems of dust overflow, dust collector and pipeline scaling and efficiency reduction in the existing converter slag roller compaction process.

[0006] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] The steel slag roller compaction crushing area dust removal system comprises a roller compaction crushing chamber, a water mist generating device, a coarse particle separation returning device, a dust removal pipeline and a wet dust removal equipment, the roller compaction crushing chamber is arranged above a roller compaction crushing bed for collecting smoke dust generated during roller compaction of the steel slag, a plurality of water mist generating devices are arranged in the roller compaction crushing chamber, the plurality of water mist generating devices spray high-speed gas mist above a roller compaction vehicle, a coarse particle separation returning device is connected to one side of a top of the roller compaction crushing chamber, the coarse particle separation returning device is connected to the wet dust removal equipment through the dust removal pipeline, the coarse particle separation returning device comprises a settling chamber, a discharge outlet of a bottom of the settling chamber is connected to a dust discharging chute, and coarse particle impurities generated by the coarse particle separation returning device are discharged through the dust discharging chute and returned to the roller compaction crushing bed again.

[0008] Further, the roller compaction crushing chamber is formed by a heat-resistant steel plate to form a large-capacity space closed cover, and an air suction port is designed on the top.

[0009] Further, the water mist generating device is arranged in a partition on the inside of the top of the roller compaction crushing chamber, the water mist generating device comprises a pipeline, a valve and a plurality of water mist nozzles, and the water mist nozzles extend along the direction of the roller compaction crushing bed.

[0010] Further, the settling chamber comprises a settling chamber main body and a matching settling chamber taper section, a plurality of rapping motors are arranged on the outside of the settling chamber taper section to prevent the coarse particles in the settling chamber from being hardened, an outlet of the settling chamber taper section is a discharge outlet, and a dust discharging valve is arranged at the discharge outlet.

[0011] Further, the roller compaction crushing chamber and the coarse particle separation returning device are arranged in a workshop, the wet dust removal equipment is arranged outside the workshop, and the wet dust removal equipment is connected to the side outlet of the settling chamber through the dust removal pipeline to form a dust removal channel.

[0012] Further, the wet dust removal equipment is mainly assembled by a spray tower, a dehydrator, a wet electric dust remover, a fan and a chimney.

[0013] The steel slag roller compaction crushing area dust removal system can realize short-time rapid cooling of high-temperature flue gas, greatly shrink the volume, reduce the air volume of the dust removal system, reduce the operation energy consumption cost of the system, and achieve the purpose of energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the steel slag roller compaction crushing area dust removal system.

[0015] Figure 2The utility model provides a kind of steel slag roller compaction crushing area dust removal system Figure 1 Local part A is enlarged.

[0016] In the figure,

[0017] 1-roller compaction crushing chamber;2-water mist generating device;

[0018] 3-coarse particle separation return system;3-1 sedimentation chamber;3-2 rapping motor;3-3 star-shaped dust valve;3-4 dust discharging chute;

[0019] 4-roller compaction vehicle;5-roller compaction crushing bed;6-dust removal pipeline;7-wet dust removal equipment. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the drawings:

[0021] Embodiment: please refer to Figure 1 And Figure 2 A kind of steel slag roller compaction crushing area dust removal system, including roller compaction crushing chamber 1, water mist generating device 2, coarse particle separation return system 3, dust removal pipeline 6 and wet dust removal equipment 7.Roller compaction crushing chamber 1 uses heat-resistant steel plate, top design 1 suction port, need according to high-temperature steam, steel slag dust working condition do anticorrosion treatment.

[0022] As shown in Figure 1 , roller compaction crushing chamber 1 is located above roller compaction crushing bed 5, using large-capacity space airtight cover, can effectively collect the smoke and dust generated when steel slag roller compaction crushing.

[0023] As shown in Figure 1 , water mist generating device 2 is arranged in the top inside partition of roller compaction crushing chamber 1, and water mist generating device 2 includes pipeline, valve and a plurality of water mist nozzles.First, steel slag is poured on roller compaction crushing bed 5 to distribute slag, and roller compaction vehicle 4 will have comb tooth cylinder to roll back and forth, while roller compaction, water mist generating device 2 is opened, and the high-speed gas mist sprayed by water mist nozzle first absorbs smoke heat to cool the smoke below dew point, and then collides, adheres and grows with dust particles in smoke.In order to ensure that the water mist is sprayed well, water pressure is 0.4-0.6MPa, and atomized water particle size is ≤40 μm.

[0024] When the flue gas flows through the settling chamber 3-1, the particle diameter in the flue gas grows to a certain extent and is separated from the flue gas and settled under the action of gravity, the coarse particle impurities in the flue gas settle in the settling chamber 3-1 in a short time, when the coarse particles in the settling chamber 3-1 reach a certain weight or material level, the star-shaped dust discharging valve 3-3 at the bottom of the settling chamber 3-1 is opened, the coarse particle impurities are discharged through the dust discharging chute 3-4 and returned to the roller compacting and crushing bed 5 again.

[0025] The coarse particle separation and return system 3 is connected with the wet dust removal equipment 7 through the dust removal pipeline 6.

[0026] The steel slag roller compacting and crushing area dust removal system, and the dust removal method comprise the following steps.

[0027] S1, first, the steel slag is poured on the roller compacting and crushing bed for slag distribution, and the roller compacting vehicle is back and forth compacted, while the water mist generating device is opened, the high-speed gas mist sprayed by the water mist nozzle absorbs the sensible heat of the flue gas to cool the flue gas below the dew point, and then collides and adheres with the dust particles in the flue gas, and the flue gas enters the settling chamber from the air inlet.

[0028] S2, when the flue gas flows through the settling chamber, the particle diameter in the flue gas grows to a certain extent and is separated from the flue gas and settled under the action of gravity, the coarse particle impurities in the flue gas settle in the settling chamber in a short time, when the coarse particles in the settling chamber reach a certain weight or material level, the dust discharging valve at the bottom of the settling chamber is opened, the coarse particle impurities are discharged through the dust discharging chute and returned to the roller compacting and crushing bed.

[0029] S3, the flue gas enters the wet dust removal equipment through the dust removal pipeline after the settling chamber, and the purified flue gas is discharged to the atmospheric environment through the chimney.

[0030] The steel slag roller compacting and crushing area dust removal system, the roller compacting and crushing chamber is located above the roller compacting and crushing bed, a large-capacity space sealed cover is adopted, and the smoke dust generated during the roller compacting and crushing of the steel slag can be effectively collected. A plurality of water mist nozzles are arranged in the roller compacting and crushing chamber, and high-speed gas mist is sprayed above the roller compacting vehicle, first, the sensible heat of the flue gas is absorbed to cool the flue gas below the dew point, and then the dust particles in the flue gas collide, adhere and grow, when the particle diameter grows to a certain extent, it will be separated from the flue gas and settled under the action of gravity, and finally returned to the roller compacting and crushing bed, which can reduce the wear of the equipment and the load of the subsequent dust removal equipment.

[0031] The above-described embodiments are merely illustrative for the application and any modification, change, or improvement made by any person skilled in the art with the application shall fall within the scope of the patent claimed by the application, and are not limited to the embodiments disclosed.

Claims

1. A steel slag roller compacted break area dust control system characterized by: The roller crushing chamber, the water mist generating device, the coarse particle separation returning device, the dust removal pipeline and the wet dust removal equipment are arranged in the workshop, and the wet dust removal equipment is connected with the side outlet of the settling chamber through the dust removal pipeline to form a dust removal channel.

2. The steel slag rolling and crushing area dust removal system according to claim 1, characterized in that: The roller crushing chamber is formed by a heat-resistant steel plate to form a large-capacity space closed cover, and an air suction port is designed at the top.

3. The steel slag rolling and crushing area dust removal system according to claim 1, characterized in that: The water mist generating device is arranged in the inner side of the top of the roller crushing chamber, and the water mist generating device comprises a pipeline, a valve and a plurality of water mist nozzles.

4. The steel slag rolling and crushing area dust removal system according to claim 1, characterized in that: The settling chamber comprises a main body and a taper section, a plurality of vibrating motors are arranged on the outer side of the taper section to prevent the coarse particles in the settling chamber from being hardened, the outlet of the taper section is a discharge port, and a dust discharge valve is arranged at the discharge port.

5. The steel slag rolling and crushing area dust removal system according to claim 1, characterized in that: The roller crushing chamber and the coarse particle separation returning device are arranged in the workshop, and the wet dust removal equipment is arranged outside the workshop.

6. The steel slag rolling and crushing area dust removal system according to claim 1, characterized in that: The wet dust removal equipment is mainly assembled by a spray tower, a dehydrator, a wet electric dust remover, a fan and a chimney.

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