A non-toxic treatment equipment for arc furnace flue dust

Abstract

The application provides an arc furnace flue ash non-toxic treatment equipment, and relates to the technical field of mixing equipment. The arc furnace flue ash non-toxic treatment equipment comprises a stirring tank for containing flue ash and treatment liquid, a stirring device arranged in the stirring tank and used for controlling mixing of the flue ash and the treatment liquid, a liquid inlet device arranged at the upper end of the stirring tank and used for conveying the treatment liquid, and a feeding device arranged on the side wall of the stirring tank and used for conveying the flue ash. The stirring device comprises a stirring rotating shaft and a stirring driving assembly used for controlling rotation of the stirring rotating shaft. A plurality of stirring rods are fixed to the side wall of the stirring rotating shaft. A liquid dispersion pipeline is fixed to the upper end of each stirring rod. The liquid dispersion pipeline and the stirring rod have a predetermined spacing to form a containing area. The feeding device is located in the containing area and is used for directing input of the flue ash into the stirring tank. The application can improve the efficiency of the non-toxic treatment of the flue ash and improve the effect of continuous mixing treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mixing equipment, in particular to an electric arc furnace flue dust non-toxic treatment equipment. BACKGROUND

[0002] The electric arc furnace flue dust is one of the main solid wastes in the smelting process, which contains a lot of heavy metals and is highly corrosive, so it needs to be non-toxic treatment.

[0003] The acid leaching or alkali leaching treatment of the flue dust by alkali or acid solution can deeply treat the flue dust, which can obtain part of the crude metal such as zinc on the one hand, and can reduce the toxicity of the flue dust on the other hand, and realizes the resource utilization.

[0004] The traditional acid leaching or alkali leaching process is to place the flue dust and the treatment liquid in the tank for sufficient stirring, so as to ensure the sufficient mixing of the two, which can improve the reaction rate and improve the mixing treatment effect; but due to the light weight of the flue dust, the flue dust is easy to diffuse when put into the tank, which affects the working environment, and part of the flue dust adheres to the top of the inner wall of the tank, which affects the normal discharge of the single operation and affects the continuous mixing treatment of the flue dust. SUMMARY

[0005] In view of the above problems, the present application provides an electric arc furnace flue dust non-toxic treatment equipment, which can improve the efficiency of the flue dust non-toxic treatment and improve the effect of continuous mixing treatment.

[0006] To solve the above problems, the technical scheme adopted by the present application is:

[0007] An electric arc furnace flue dust non-toxic treatment equipment, comprising a stirring tank for containing flue dust and treatment liquid, a stirring device for controlling the mixing of the two being arranged inside the stirring tank, a liquid inlet device for conveying the treatment liquid being arranged on the upper end of the stirring tank, a feeding device for conveying the flue dust being arranged on the side wall of the stirring tank, the stirring device comprising a stirring shaft and a stirring drive assembly for controlling the rotation of the stirring shaft, a plurality of stirring rods being fixed on the side wall of the stirring shaft, a liquid dispersion pipeline being fixed on the upper end of the stirring rod and located on the side wall of the stirring shaft, the liquid dispersion pipeline and the stirring rod having a predetermined spacing to form an accommodation area, the feeding device being located in the accommodation area and directing the flue dust into the stirring tank; the liquid inlet device comprising a second liquid inlet assembly coaxially arranged with the stirring shaft, the second liquid inlet assembly comprising a liquid inlet pipeline and a liquid inlet control valve body, a liquid dispersion chamber being formed in the liquid dispersion pipeline, a plurality of nozzles being fixed on the lower end of the liquid dispersion pipeline and communicating with the liquid dispersion chamber, the liquid inlet control valve body communicating with the liquid dispersion chamber and directing the treatment liquid into the interior of the liquid dispersion chamber.

[0008] Preferably, the liquid inlet device further comprises a first liquid inlet assembly, which is arranged on the upper end of the stirring tank outside the second liquid inlet assembly.

[0009] Preferably, the feeding device comprises a feeding pipe, which is provided with a first feeding opening on the upper end outside the stirring tank, and is provided with a second feeding opening on the lower end inside the stirring tank, and is further provided with a feeding auger for controlling directional movement of the flue ash.

[0010] Preferably, the feeding pipe is provided with a sealing device outside the second feeding opening, which controls opening and closing of the second feeding opening, and the sealing device is connected to the liquid inlet control valve body through a linkage device, and the second feeding opening is in a closed state through the sealing device after the liquid inlet control valve body is opened.

[0011] Preferably, the sealing device comprises a sealing sleeve, which is rotatably connected between the feeding pipe and the sealing sleeve, and is provided with a guide gap at the lower end, and the second feeding opening is located on the rotation path of the guide gap.

[0012] Preferably, the sealing sleeve is rotatably connected to the stirring tank through the end portion, and the linkage device comprises a linkage mounting base, which is rotatably connected with a linkage rotating shaft fixedly connected to the liquid inlet control valve body through the side wall, and the linkage rotating shaft is connected to the outer wall of the sealing sleeve through the linkage transmission member.

[0013] Preferably, the liquid dispersion pipe is provided with a liquid spraying pipe outside, the liquid spraying pipe is internally provided with a magnetic control valve, the sealing sleeve is internally provided with at least two permanent magnets, the two permanent magnets have different attractive effects, the two permanent magnets are arranged in a spaced manner, and the magnetic control valve is located on the deflection path of the permanent magnet.

[0014] Preferably, the stirring tank is provided with a discharging device for discharging at the lower end, and the discharging device comprises a discharging pipe and a discharging opening and closing valve arranged in the discharging pipe.

[0015] Preferably, the feeding device is arranged inside along a direction perpendicular to the stirring shaft, and the end of the feeding device is opposite to the midpoint of the stirring rod.

[0016] The present application has the following beneficial effects:

[0017] Compared with the prior art, by the above structural design, the flue ash and the treatment liquid can be optimally put, the influence on the operation environment in the flue ash putting process is reduced, meanwhile, the treatment liquid sprayed from the top can accelerate the settlement of the flue ash in the stirring tank, meanwhile, the corners in the stirring tank can be efficiently cleaned, the efficiency of the non-toxic treatment of the flue ash is improved, and the effect of the continuous mixing treatment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective structural schematic view of the present application.

[0019] Figure 2 is a top view structural schematic view of the present application. Figure 1

[0020] Figure 3 is a front view structural schematic view of the present application. Figure 1

[0021] Figure 4 is an A-A sectional view structural schematic view of the present application. Figure 3

[0022] Figure 5 is an enlarged structural schematic view of B of the present application. Figure 4

[0023] In the figure: 100, support frame; 200, stirring tank; 300, first liquid inlet assembly; 400, second liquid inlet assembly; 410, liquid inlet pipeline; 420, liquid inlet control valve body; 500, stirring device; 510, stirring drive assembly; 520, stirring rotating shaft; 530, liquid dispersion pipeline; 531, liquid dispersion chamber; 532, magnetic control valve; 533, liquid spraying pipeline; 540, stirring rod; 600, linkage device; 610, linkage rotating shaft; 620, linkage transmission part; 630, linkage mounting base; 700, feeding device; 710, feeding pipeline; 711, first feeding opening; 712, second feeding opening; 720, feeding auger; 730, sealing sleeve; 731, material guiding notch; 800, discharging device; 810, discharging pipeline; 820, discharging opening and closing valve. DETAILED DESCRIPTION

[0024] The present application is further illustrated below in combination with the drawings and examples.

[0025] In order to solve the problems mentioned in the background art, referring to the accompanying Figure 1 - the Figure 5 ​​​​The utility model provides an arc furnace flue dust non-toxic treatment equipment, including the agitator tank 200 for containing flue dust and processing liquid, the agitator tank 200 inside is provided with the stirring device 500 for controlling both mixing, processing liquid and flue dust are put into the agitator tank 200 under the action of stirring device 500 and the mixing of both, accelerate the reaction between both, improve the mixing efficiency, and the processing liquid here is selected as acid liquid or alkali liquid according to the need of processing.

[0026] The liquid inlet device for conveying processing liquid is arranged on the upper end of the agitator tank 200, and the feed device 700 for conveying flue dust is arranged on the side wall of the agitator tank 200. The processing liquid and the flue dust are conveyed into the agitator tank 200 through the relatively closed structure, realizing automatic feeding and conveying, and avoiding the influence of flue dust diffusion on the surrounding working environment.

[0027] Specifically, the stirring device 500 includes a stirring shaft 520 and a stirring drive assembly 510 for controlling the rotation of the stirring shaft 520. A plurality of stirring rods 540 are fixed to the side wall of the stirring shaft 520. A liquid dispersion pipeline 530 is also fixed to the upper end of the stirring rod 540. The liquid dispersion pipeline 530 and the stirring rod 540 can be selected as multiple groups arranged in a circumferential direction. The liquid dispersion pipeline 530 and the stirring rod 540 have a predetermined spacing to form an accommodation area. The feed device 700 is located in the accommodation area and directs the input of flue dust into the agitator tank 200. The liquid dispersion pipeline 530 and the stirring rod 540 are arranged horizontally. During the rotation around the stirring shaft 520, the area of the accommodation area does not change and does not interfere with the feed device 700, ensuring the normal feeding of flue dust.

[0028] The liquid inlet device includes a second liquid inlet assembly 400 coaxially arranged with the stirring shaft 520. The processing liquid can be pumped into the agitator tank 200 through the second liquid inlet assembly 400 to mix with the flue dust. The second liquid inlet assembly 400 includes a liquid inlet pipeline 410 and a liquid inlet control valve body 420. The liquid dispersion pipeline 530 has a liquid dispersion chamber 531 formed inside. A plurality of nozzles are fixed to the lower end of the liquid dispersion pipeline 530 and communicate with the liquid dispersion chamber 531. The processing liquid can be sprayed from the top of the agitator tank 200 through the nozzles. The sprayed liquid is dispersed and can be in a mist state. The liquid inlet control valve body 420 communicates with the liquid dispersion chamber 531 and directs the input of processing liquid into the liquid dispersion chamber 531.

[0029] After the flue ash is discharged into the stirring tank 200 through the feeding device 700, the feeding device 700 is closed, and the treatment liquid is pumped into the stirring tank 200 from the top through the second liquid inlet assembly 400, the treatment liquid can be sprayed from the plurality of nozzles, the sprayed treatment liquid can accelerate the settlement of the flue ash at the top part of the stirring tank 200, and the mixing process is accelerated; at the same time, the continuously sprayed treatment liquid can also flush the flue ash attached to the inner wall of the stirring tank 200 or the upper end of the stirring device, and the continuously sprayed treatment liquid can realize continuous cleaning of the inner wall of the stirring tank 200 at the discharging stage after the mixing is completed, so that the mixed substances can be prevented from continuously accumulating in the corners.

[0030] It should be noted that the treatment liquid is pumped twice, the first time can pump most of the treatment liquid into the stirring tank 200 at the bottom of the stirring tank 200, and then the flue ash is discharged from the feeding device 700 to be fully mixed with the treatment liquid in the stirring tank 200; finally, the remaining treatment liquid is pumped through the second liquid inlet assembly 400 and the liquid dispersion pipeline 530, which can settle the flue ash while cleaning the related structure of the inner wall of the stirring tank 200, so that the continuous and efficient non-toxic treatment of the flue ash is ensured.

[0031] In summary, through the above structure design, the flue ash and the treatment liquid can be optimally placed, the influence of the flue ash on the working environment during the placing process is reduced, and the treatment liquid sprayed from the top can accelerate the settlement of the flue ash in the stirring tank 200, and can efficiently clean the corners of the stirring tank 200, so that the efficiency of the non-toxic treatment of the flue ash is accelerated, and the effect of the continuous mixing treatment is improved.

[0032] Specifically, the liquid inlet device further comprises a first liquid inlet assembly 300, and the first liquid inlet assembly 300 is arranged at the upper end of the stirring tank 200 outside the second liquid inlet assembly 400. A large amount of treatment liquid can be quickly pumped into the stirring tank 200 through the first liquid inlet assembly 300, thereby improving the efficiency of the treatment liquid pumping.

[0033] Specifically, the feeding device 700 comprises a feeding pipeline 710, the feeding pipeline 710 is provided with a first feeding opening 711 at the upper end outside the stirring tank 200, the feeding pipeline 710 is provided with a second feeding opening 712 at the lower end inside the stirring tank 200, and a feeding auger 720 for controlling the directional movement of the flue ash is further arranged in the feeding pipeline 710.

[0034] During the process of feeding the flue ash, the continuous directional rotation of the feeding auger 720 can control the directional movement of the flue ash in the feeding pipe 710. The first feeding opening 711 can be connected with a storage tank, and the flue ash can fall into the feeding pipe 710 under the action of gravity. During the directional rotation of the feeding auger 720, the directional movement of the flue ash in the feeding pipe 710 is controlled, and finally the flue ash is discharged from the second feeding opening 712 and falls into the stirring tank 200 to complete the feeding.

[0035] The second feeding opening 712 is downwardly opened, which can reduce the influence of the treatment liquid sprayed from the top on the second feeding opening 712, avoid excessive scabbing inside, and avoid affecting the normal discharge of the flue ash.

[0036] In order to further reduce the influence of the treatment liquid sprayed from the top on the second feeding opening 712, a sealing device located outside the second feeding opening 712 is sleeved outside the feeding pipe 710. The opening and closing of the second feeding opening 712 are controlled by the sealing device. In the state of spraying the treatment liquid, the second feeding opening 712 is closed by the sealing device, which can avoid the mixed liquid after atomization entering the second feeding opening 712 and mixing with the internal flue ash, and ensure the stability of the whole.

[0037] The sealing device is linked with the liquid inlet control valve body 420 through the linkage device 600. After the liquid inlet control valve body 420 is opened, the second feeding opening 712 is in a closed state controlled by the sealing device. Through the above structure design, the sealing device is closed during the opening of the liquid inlet control valve body 420, and the second feeding opening 712 is opened to realize the normal discharge of the flue ash when the liquid inlet control valve body 420 is closed.

[0038] The sealing device includes a sealing sleeve 730, which is rotationally connected between the feeding pipe 710 and the feeding pipe 710. The lower end of the sealing sleeve 730 is provided with a guide gap 731, and the second feeding opening 712 is located in the rotation path of the guide gap 731. The sealing sleeve 730 is sealingly connected with the outer wall of the feeding pipe 710, and the rotation guide gap 731 is opposite to the second feeding opening 712. The flue ash can be discharged from the lower end under the action of gravity. By controlling the staggered arrangement of the two, the second feeding opening 712 can be closed by the sealing sleeve 730 to avoid the entry of the external atomized treatment liquid.

[0039] The end part of the sealing sleeve 730 penetrates through the stirring tank 200 and is in sealing rotary connection with the stirring tank 200. The linkage device 600 comprises a linkage mounting base 630, the linkage mounting base 630 is in rotary connection with a linkage rotating shaft 610 fixedly connected with the liquid inlet control valve body 420, and the linkage rotating shaft 610 is connected with the outer wall of the sealing sleeve 730 through a linkage transmission member 620. The linkage rotating shaft 610 is electrically controlled to rotate, and the first side of the linkage rotating shaft 610 is directly fixed with the liquid inlet control valve body 420, so that the liquid inlet control valve body 420 can be controlled to deflect by a predetermined angle around the linkage rotating shaft 610. The liquid inlet control valve body 420 can be selected as a ball valve, and rotation to different positions can complete the opening and closing control.

[0040] The second end of the linkage rotating shaft 610 can drive the sealing sleeve 730 to rotate through the linkage transmission member 620. The linkage transmission member 620 can be selected as a belt conveying assembly. According to the angle required to be deflected between the liquid inlet control valve body 420 and the sealing sleeve 730, the size of the two belt pulleys is controlled to realize the opening and closing control of the liquid inlet control valve body 420 and the sealing sleeve 730 in opposite states.

[0041] The liquid injection pipeline 533 is arranged outside the liquid dispersion pipeline 530, the magnetic control valve 532 is arranged in the liquid injection pipeline 533, and part of the treatment liquid in the liquid dispersion chamber 531 can be discharged from the liquid injection pipeline 533 by controlling the magnetic control valve 532 to be opened. The discharged treatment liquid can directly act on the inner wall of the stirring tank 200, so that the inner wall of the stirring tank 200 can be efficiently cleaned. When the magnetic control valve is in a closed state, liquid cannot be discharged from the liquid injection pipeline 533, so that more liquid can be atomized and discharged through the nozzle, and the settlement effect of the flue ash floating in the stirring tank 200 can be improved.

[0042] At least two permanent magnets are embedded in the sealing sleeve 730, the two permanent magnets have different attractive effects, the two permanent magnets are arranged at intervals, the magnetic control valve 532 is located on the deflection path of the permanent magnets, the poles of the two permanent magnets are opposite, the first permanent magnet is controlled to be opposite to the magnetic control valve, so that the magnetic control valve can be controlled to be opened, the second permanent magnet is controlled to be opposite to the magnetic control valve, so that the magnetic control valve can be controlled to be closed, and different permanent magnets are controlled to be opposite to the magnetic control valve according to different treatment stages, so that the adjustment control can be realized.

[0043] In the control process, the sealing sleeve 730 can be continuously rotated in the closing direction in the closed state, so that the normal discharge of the treatment liquid can be ensured under the premise that the second feeding opening 712 is closed. Meanwhile, when the sealing sleeve 730 and the liquid inlet control valve body 420 are deflected to different positions, the amount and the spraying mode of the treatment liquid can be adaptively adjusted, so that the operation requirements in different stages can be met.

[0044] When the treatment liquid is in the fully atomized state, the inlet control valve body 420 is controlled to have a small opening degree, so as to reduce the pressure of the internal structure; when the treatment liquid is atomized and sprayed from the outside of the liquid spraying pipeline 533, the inlet control valve body 420 is controlled to have a large opening degree, so as to meet the need of the amount of treatment liquid sprayed.

[0045] A lower discharging device 800 is arranged at the lower end of the stirring tank 200, and the lower discharging device 800 comprises a lower discharging pipeline 810 and a lower discharging on-off valve 820 arranged in the lower discharging pipeline 810; the lower discharging on-off valve 820 can be selected as a gate valve; in the stirring and mixing stage, the lower discharging on-off valve 820 is controlled to be closed, so as to avoid the discharge of the mixed medium; after the stirring and mixing is completed, the lower discharging on-off valve 820 is controlled to be opened, so that the fully mixed medium can be discharged from the lower discharging pipeline 810, and the stirring tank 200 is emptied, so as to prepare for the subsequent treatment of the flue ash.

[0046] The inside of the feeding device 700 extends along the direction perpendicular to the stirring shaft 520, and the end of the inside of the feeding device 700 is opposite to the midpoint of the stirring rod 540; through the above structure design, the discharged flue ash can be in contact with the stirring rod 540 under the action of gravity, the stirring rod 540 in rotation can scatter and disperse the flue ash, and the flue ash can be uniformly mixed with the treatment liquid, so as to further improve the efficiency of the treatment of the flue ash.

[0047] The feeding device 700 can be arranged in several groups around the stirring tank 200 in the circumferential direction, the flue ash is discharged from multiple directions, and the uniformity of the flue ash feeding is further ensured.

[0048] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An arc furnace flue dust non-toxic treatment equipment, comprising a stirring tank (200) for containing flue dust and treatment liquid, wherein a stirring device (500) for controlling the mixing of the two is arranged inside the stirring tank (200), a liquid inlet device for delivering treatment liquid is arranged at the upper end of the stirring tank (200), and a feeding device (700) for delivering flue dust is arranged on the side wall of the stirring tank (200), characterized in that: the stirring device (500) comprises a stirring shaft (520) and a stirring drive assembly (510) for controlling the rotation of the stirring shaft (520), a plurality of stirring rods (540) are fixed on the side wall of the stirring shaft (520), a liquid dispersion pipeline (530) is fixed on the upper end of the stirring rod (540), and a predetermined spacing is formed between the liquid dispersion pipeline (530) and the stirring rod (540) to form a containing area, and the feeding device (700) is located in the containing area and directs the input of flue dust into the stirring tank (200); the liquid inlet device comprises a second liquid inlet assembly (400) coaxially arranged with the stirring shaft (520), the second liquid inlet assembly (400) comprises a liquid inlet pipeline (410) and a liquid inlet control valve body (420), a liquid dispersion chamber (531) is formed inside the liquid dispersion pipeline (530), a plurality of nozzles are fixed on the lower end of the liquid dispersion pipeline (530) and communicate with the liquid dispersion chamber (531), and the liquid inlet control valve body (420) communicates with the liquid dispersion chamber (531) and directs the input of treatment liquid into the liquid dispersion chamber (531); the feeding device (700) comprises a feeding pipeline (710), the feeding pipeline (710) is provided with a first feeding opening (711) on the upper end outside the stirring tank (200), the feeding pipeline (710) is provided with a second feeding opening (712) on the lower end inside the stirring tank (200), and a feeding auger (720) for controlling the directional movement of flue dust is further arranged in the feeding pipeline (710); a sealing device is arranged on the outside of the feeding pipeline (710) and located outside the second feeding opening (712), the opening and closing of the second feeding opening (712) are controlled by the sealing device, the sealing device is linked to the liquid inlet control valve body (420) through a linkage device (600), and the second feeding opening (712) is in a closed state controlled by the sealing device after the liquid inlet control valve body (420) is opened; the sealing device comprises a sealing sleeve (730), the sealing sleeve (730) is rotationally connected between the feeding pipeline (710), the lower end of the sealing sleeve (730) is provided with a material guiding gap (731), and the second feeding opening (712) is located on the rotation path of the material guiding gap (731). ​ The liquid dispersion pipeline (530) is externally provided with a liquid spraying pipeline (533), the liquid spraying pipeline (533) is internally provided with a magnetic control valve (532), the sealing sleeve (730) is internally embedded with two permanent magnets, the two permanent magnets have different attractive effects, the two permanent magnets are arranged at intervals, and the magnetic control valve (532) is located on the deflection path of the permanent magnet.

2. An electric arc furnace flue dust detoxification plant according to claim 1, characterized in that, The liquid inlet device further comprises a first liquid inlet assembly (300), which is arranged on the upper end of the stirring tank (200) and located outside the second liquid inlet assembly (400).

3. The arc furnace flue dust detoxification plant according to claim 1, wherein The sealing sleeve (730) penetrates the stirring tank (200) at the end and is in sealed rotary connection with the stirring tank (200), the linkage device (600) comprises a linkage mounting base (630), the linkage mounting base (630) is in rotary connection with a linkage rotary shaft (610) which is fixedly connected with the liquid inlet control valve body (420), one side of the linkage rotary shaft (610) is provided with a linkage transmission member (620), and the linkage rotary shaft (610) is connected with the outer wall of the sealing sleeve (730) through the linkage transmission member (620).

4. The arc furnace flue dust detoxification plant according to claim 1, wherein The lower end of the stirring tank (200) is provided with a discharging device (800) for discharging materials, and the discharging device (800) comprises a discharging pipeline (810) and a discharging opening and closing valve (820) mounted in the discharging pipeline (810).

5. An arc furnace flue dust detoxification plant according to claim 1, wherein The inside of the feeding device (700) extends along the direction perpendicular to the stirring rotary shaft (520), and the end of the inside of the feeding device (700) is opposite to the midpoint of the stirring rod (540).

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