A heavy metal trapping and filtering device in zinc oxide smelting tail gas

Abstract

The utility model discloses a heavy metal trapping filter device in zinc oxide smelting tail gas, include: flange pipe, the output connection subassembly of assembling on flange pipe, the device is through tail gas first into diffusion bowl under flange pipe, and the flow rate tends to be stable under the buffer of guide plate, and then passes through the filter board no.

Description

Technical Field

[0001] This utility model relates to the field of zinc oxide smelting technology, and more specifically, to a heavy metal capture and filtration device for zinc oxide smelting tail gas. Background Technology

[0002] Zinc oxide smelting involves feeding zinc-containing ore or secondary materials into a rotary kiln, fuming furnace, or electric arc furnace, where coke and pulverized coal are added at around 1200℃ for reduction and volatilization. This causes zinc to escape as vapor with the flue gas, which then reacts with air in an oxidation chamber to generate zinc oxide particles. Finally, high-purity zinc oxide powder is obtained through cooling and dust collection (bag filter or electrostatic precipitator). This process can directly utilize low-grade ore and recover secondary resources such as steel plant flue dust and galvanized slag, achieving resource recycling and clean extraction.

[0003] A search revealed an existing patent (publication number: CN222034006U) that discloses a tail gas purification device for zinc oxide roasting. The device includes a tail gas purification pipe with grooves on both sides of its interior. Sliding blocks are slidably fitted inside the grooves, and a filter screen is fixedly connected between the sliding blocks. A drive motor is fixedly connected to one side of the tail gas purification pipe, and a turntable is fixedly connected to the drive end of the drive motor. A striking block is fixedly connected to one side of the turntable, and one end of the striking block abuts against the filter screen. This invention features a discharge ramp, a guide block, a filter screen, and an exhaust pipe. The discharge ramp directs gas upwards through the center, and the guide block directs the gas upwards through both sides. The filter screen performs a permeation filtration process, allowing the gas to enter a layer of filter cotton and activated carbon for filtration. The gas is then discharged through the exhaust pipe. This multi-layer filtration system purifies multiple gases, resulting in high efficiency and convenient operation.

[0004] Even more seriously, under the high-frequency vibration of the device during the knocking and dust removal process, the heavy metal dust deposited in the discharge inclined plate and collection tank is easily stirred up again. It directly penetrates the edge of the not completely sealed filter layer with the rising airflow and eventually escapes from the exhaust pipe, causing the heavy metals that were originally captured to re-enter the atmosphere, forming a secondary pollution source of "purification and leakage at the same time". The actual emission concentration is higher than the design expectation. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a heavy metal capture and filtration device for zinc oxide smelting tail gas, so as to solve the problem that the high-frequency dust cleaning vibration will cause the captured heavy metal dust to be raised again, pass through the gaps in the filter layer and escape with the tail gas, resulting in the emission concentration exceeding the standard.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a heavy metal capture and filtration device for zinc oxide smelting tail gas, comprising: a flange pipe; an output connection assembly mounted on the flange pipe, the output connection assembly being used to collect tail gas; a transmission assembly mounted on the output connection assembly, the transmission assembly being used to transmit tail gas; a filter plate anti-clogging assembly mounted inside the transmission assembly, the filter plate anti-clogging assembly being used to filter tail gas; an activated carbon quick-replacement assembly mounted on the transmission assembly, the activated carbon quick-replacement assembly being used to quickly replace activated carbon; and a heavy metal particle secondary filtration assembly mounted on the transmission assembly, the heavy metal particle secondary filtration assembly being used to perform secondary treatment on tail gas.

[0007] Preferably, the output connection assembly includes: a connecting pipe fixedly installed on the top of the flange pipe, a diffusion hopper fixedly installed on the top of the connecting pipe, a guide plate fixedly installed inside the diffusion hopper, a release pipe fixedly installed on one side of the diffusion hopper, and a switch cover movably installed at one end of the release pipe.

[0008] Preferably, the transmission component includes: a lower pipe fixedly installed on the top of the diffusion hopper, a connecting rod fixedly installed on the top of the lower pipe, and an upper pipe fixedly installed on the top of the connecting rod.

[0009] Preferably, the filter plate anti-clogging assembly includes: a pressing frame movably sleeved on the top of the upper tube, a spring one fixedly installed at the bottom of the pressing frame, a filter plate one fixedly installed at the bottom of the spring one, and a spring two fixedly installed at the bottom of the filter plate one.

[0010] Preferably, the filter plate anti-clogging assembly further includes: a filter plate two fixedly installed at the bottom of the spring two, a spring three fixedly installed at the bottom of the filter plate two, an installation ring fixedly installed at the top of the spring three, and the installation ring fixedly installed inside the upper tube.

[0011] Preferably, the activated carbon quick-change assembly includes: a limiting ring fixedly installed on the lower tube; an annular baffle movably sleeved on the outer surface of the upper tube; a sealing ring fixedly installed on the top of the annular baffle; and an inclined bucket frame fixedly installed inside the lower tube.

[0012] Preferably, the secondary filtration assembly for heavy metal particles includes: an exhaust pipe fixedly installed on the top of the upper pipe, a spray pipe fixedly installed on the outer surface of the exhaust pipe, a heavy metal catching agent tank fixedly installed on the top of the spray pipe, and a water pump fixedly installed on the top of the heavy metal catching agent tank.

[0013] Preferably, the secondary filtration assembly for heavy metal particles further includes: a water pipe fixedly installed at the bottom of the exhaust pipe, a collection box fixedly installed at the bottom of the water pipe, and an outlet pipe fixedly installed on one side of the collection box.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a method where exhaust gas first enters a diffusion hopper through a flange pipe. The flow rate stabilizes under the buffering effect of a guide plate, and then passes through two floating filter plates. Supported by springs one, two, and three, the filter plates are gently vibrated to remove dust. Dust slides down the inclined hopper frame to the bottom of the lower pipe and is suppressed by a water film, significantly reducing dust re-entrainment. When activated carbon needs replenishment, the old carbon can be removed and new carbon pushed in by loosening the sealing ring, resulting in a short time consumption and maintaining a relatively full adsorption layer. Subsequently, the exhaust gas enters the exhaust pipe, where a water pump draws chelating liquid from the heavy metal trapping agent tank and atomizes it through a spray pipe, ensuring full contact with residual heavy metals. Dust-laden droplets flow along the water pipe into a collection box and are then periodically discharged through the outlet pipe. Overall, the risks of dust back-mixing and bypass leakage are controlled to a low level, and the emission concentration is more stable than before. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the output connection component structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the transmission component and the activated carbon quick-change component of this utility model.

[0019] Figure 4 This is a schematic diagram of the filter plate anti-clogging component of this utility model;

[0020] Figure 5 This is a schematic diagram of the secondary filtration component for heavy metal particles according to this utility model.

[0021] [Figure Labels]

[0022] 1. Flange pipe; 2. Output connection assembly; 3. Transmission assembly; 4. Filter plate anti-clogging assembly; 5. Activated carbon quick replacement assembly; 6. Heavy metal particle secondary filtration assembly; 201. Connecting pipe; 202. Diffusion hopper; 203. Guide plate; 204. Release pipe; 205. Switch cover; 301. Lower pipe; 302. Connecting rod; 303. Upper pipe; 401. Pressing frame; 402. Spring 1; 403. Filter plate 1; 404. Spring 2; 405. Filter plate 2; 406. Spring 3; 407. Mounting ring; 501. Limiting ring; 502. Annular baffle; 503. Sealing ring; 504. Inclined bucket frame; 601. Exhaust pipe; 602. Spray pipe; 603. Heavy metal catching agent tank; 604. Water pump; 605. Water pipe; 606. Collection box; 607. Liquid outlet pipe. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0024] Example 1

[0025] A preferred embodiment of the heavy metal capture and filtration device for zinc oxide smelting tail gas provided by this utility model is, for example... Figures 1 to 5 As shown, it includes: a flange pipe 1; an output connection assembly 2 mounted on the flange pipe 1, the output connection assembly 2 being used to collect exhaust gas; a transmission assembly 3 mounted on the output connection assembly 2, the transmission assembly 3 being used to transmit exhaust gas; a filter plate anti-clogging assembly 4 mounted inside the transmission assembly 3, the filter plate anti-clogging assembly 4 being used to filter the exhaust gas; an activated carbon quick-replacement assembly 5 mounted on the transmission assembly 3, the activated carbon quick-replacement assembly 5 being used to quickly replace activated carbon; and a heavy metal particle secondary filtration assembly 6 mounted on the transmission assembly 3, the heavy metal particle secondary filtration assembly 6 being used for secondary treatment of the exhaust gas.

[0026] In this embodiment, the output connection assembly 2 includes: a connecting pipe 201 fixedly installed on the top of the flange pipe 1, a diffusion hopper 202 fixedly installed on the top of the connecting pipe 201, a guide plate 203 fixedly installed inside the diffusion hopper 202, a release pipe 204 fixedly installed on one side of the diffusion hopper 202, and a switch cover 205 movably installed at one end of the release pipe 204.

[0027] In this embodiment, the transmission component 3 includes: a lower pipe 301 fixedly installed on the top of the diffusion hopper 202, a connecting rod 302 fixedly installed on the top of the lower pipe 301, and an upper pipe 303 fixedly installed on the top of the connecting rod 302.

[0028] In this embodiment, the filter plate anti-clogging component 4 includes: a pressing frame 401 movably sleeved on the top of the upper tube 303, a spring 402 fixedly installed at the bottom of the pressing frame 401, a filter plate 403 fixedly installed at the bottom of the spring 402, and a spring 404 fixedly installed at the bottom of the filter plate 403.

[0029] In this embodiment, the filter plate anti-clogging assembly 4 further includes: a filter plate 405 fixedly installed at the bottom of the second spring 404, a third spring 406 fixedly installed at the bottom of the filter plate 405, an installation ring 407 fixedly installed at the top of the third spring 406, and the installation ring 407 fixedly installed inside the upper tube 303.

[0030] Example 2

[0031] Based on Embodiment 1, a preferred embodiment of the heavy metal capture and filtration device for zinc oxide smelting tail gas provided by this utility model is, for example... Figures 1 to 5 As shown: The activated carbon quick replacement assembly 5 includes: a limiting ring 501 fixedly installed on the lower tube 301, an annular baffle 502 movably sleeved on the outer surface of the upper tube 303, a sealing ring 503 fixedly installed on the top of the annular baffle 502, and an inclined bucket frame 504 fixedly installed inside the lower tube 301.

[0032] In this embodiment, the secondary filtration assembly 6 for heavy metal particles includes: an exhaust pipe 601 fixedly installed on the top of the upper pipe 303, a spray pipe 602 fixedly installed on the outer surface of the exhaust pipe 601, a heavy metal catching agent tank 603 fixedly installed on the top of the spray pipe 602, and a water pump 604 fixedly installed on the top of the heavy metal catching agent tank 603.

[0033] In this embodiment, the secondary filtration assembly 6 for heavy metal particles further includes: a water pipe 605 fixedly installed at the bottom of the exhaust pipe 601, a collection box 606 fixedly installed at the bottom of the water pipe 605, and an outlet pipe 607 fixedly installed on one side of the collection box 606.

[0034] The exhaust gas first enters the diffuser hopper 202 through flange pipe 1. The flow rate stabilizes under the buffering effect of guide plate 203, and then passes through the floating filter plates 403 and 405. Supported by springs 402, 404, and 406, the filter plates are gently vibrated to remove dust. Dust slides down the inclined hopper frame 504 to the bottom of the lower pipe 301 and is suppressed by the water film, significantly reducing the tendency for dust to rise. When activated carbon needs to be replenished, the old carbon can be removed and new carbon pushed in by loosening the sealing ring 503, which is quick and keeps the adsorption layer relatively full. The exhaust gas then enters the exhaust pipe 601. Water pump 604 draws chelating liquid from the heavy metal trapping agent tank and atomizes it through spray pipe 602, ensuring full contact with residual heavy metals. Dust-laden droplets flow along water pipe 605 into collection box 606, and are then periodically discharged through outlet pipe 607. Overall, the risk of dust backmixing and bypass leakage is controlled at a low level, and the emission concentration is more stable than before.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy metal capture and filtration device for zinc oxide smelting tail gas, characterized in that, include: Flange pipe (1); An output connection assembly (2) is mounted on the flange pipe (1) for collecting exhaust gas; A transmission component (3) is mounted on the output connection component (2), the transmission component (3) being used to transmit exhaust gas; The filter plate anti-clogging assembly (4) is installed inside the transmission assembly (3) and is used to filter the exhaust gas. An activated carbon quick-change assembly (5) is mounted on the transmission assembly (3), the activated carbon quick-change assembly (5) being used for quick replacement of activated carbon; The heavy metal particle secondary filtration assembly (6) is mounted on the transmission assembly (3) and is used to perform secondary treatment on the exhaust gas.

2. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 1, characterized in that, The output connection component (2) includes: A connecting pipe (201) is fixedly installed on the top of the flange pipe (1). A diffusion hopper (202) is fixedly installed on the top of the connecting pipe (201). A guide plate (203) is fixedly installed inside the diffusion hopper (202). A release pipe (204) is fixedly installed on one side of the diffusion hopper (202). A switch cover (205) is movably installed at one end of the release pipe (204).

3. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 2, characterized in that, The transmission component (3) includes: A lower pipe (301) is fixedly installed on the top of the diffusion hopper (202), a connecting rod (302) is fixedly installed on the top of the lower pipe (301), and an upper pipe (303) is fixedly installed on the top of the connecting rod (302).

4. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 3, characterized in that, The filter plate anti-clogging assembly (4) includes: A pressing frame (401) is movably sleeved on the top of the upper tube (303). A spring (402) is fixedly installed at the bottom of the pressing frame (401). A filter plate (403) is fixedly installed at the bottom of the spring (402). A spring (404) is fixedly installed at the bottom of the filter plate (403).

5. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 4, characterized in that, The filter plate anti-clogging assembly (4) also includes: A filter plate 2 (405) is fixedly installed at the bottom of the second spring (404). A third spring (406) is fixedly installed at the bottom of the filter plate 2 (405). An installation ring (407) is fixedly installed at the top of the third spring (406). The installation ring (407) is fixedly installed inside the upper tube (303).

6. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 5, characterized in that, The activated carbon quick-change component (5) includes: A limiting ring (501) is fixedly installed on the lower tube (301), an annular baffle (502) is movably sleeved on the outer surface of the upper tube (303), a sealing ring (503) is fixedly installed on the top of the annular baffle (502), and an inclined bucket frame (504) is fixedly installed inside the lower tube (301).

7. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 6, characterized in that, The secondary filtration assembly (6) for heavy metal particles includes: An exhaust pipe (601) is fixedly installed on the top of the upper pipe (303). A spray pipe (602) is fixedly installed on the outer surface of the exhaust pipe (601). A heavy metal scavenging agent tank (603) is fixedly installed on the top of the spray pipe (602). A water pump (604) is fixedly installed on the top of the heavy metal scavenging agent tank (603).

8. The heavy metal capture and filtration device for zinc oxide smelting tail gas according to claim 7, characterized in that, The secondary filtration assembly (6) for heavy metal particles also includes: A water pipe (605) is fixedly installed at the bottom of the exhaust pipe (601), and a collection box (606) is fixedly installed at the bottom of the water pipe (605). An outlet pipe (607) is fixedly installed on one side of the collection box (606).

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