Waste recovery device for electrolytic aluminum production

Abstract

The invention relates to the technical field of waste recovery, and discloses a waste recovery device for electrolytic aluminum production, which comprises a recovery crusher, a liquid curtain covering mechanism is arranged at a feed port of the recovery crusher, and the liquid curtain covering mechanism is configured to spray an alkaline diluent to the feed port, so that the crushed waste is in a slurry state; the dehydration mechanism is used in combination with the recycling crusher, the feeding end of the dehydration mechanism is connected with the discharging end of the recycling crusher, and the dehydration mechanism is used for carrying out solid-liquid separation treatment on the slurry-shaped waste; the liquid curtain covering mechanism is arranged at the feeding port of the recycling pulverizer, alkaline diluent is sprayed, dust flying in the pulverizing process is effectively restrained, the risk of dust explosion is reduced, the working environment is improved, meanwhile, waste is directly in a slurry shape after being pulverized, and follow-up treatment is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the field of waste recycling, in particular to a waste recycling device for electrolytic aluminum production. BACKGROUND

[0002] A large amount of waste is generated in the electrolytic aluminum production process, and the waste usually contains aluminum, aluminum oxide, fluorides and other substances, some of which are corrosive, toxic or flammable and explosive. The traditional waste treatment method is often inefficient, has the risk of environmental pollution, and fails to fully recover valuable components.

[0003] In the waste crushing process, the dust generated not only harms the health of the operators, but also may cause dust explosion and other safety accidents. Therefore, we propose a waste recycling device for electrolytic aluminum production. SUMMARY

[0004] The application provides a waste recycling device for electrolytic aluminum production, which solves the technical problem that in the waste crushing process, the dust generated not only harms the health of the operators, but also may cause dust explosion and other safety accidents in the related art.

[0005] The application provides a waste recycling device for electrolytic aluminum production, which comprises: A recycling crusher is provided with a liquid curtain covering mechanism at the feed inlet of the recycling crusher, and the liquid curtain covering mechanism is configured to spray alkaline diluent to the feed inlet, so that the crushed waste is in the form of slurry; A dewatering mechanism is used in combination with the recycling crusher, the feed end of the dewatering mechanism is connected with the discharge end of the recycling crusher, and the dewatering mechanism is used for solid-liquid separation treatment of the slurry waste; The outer space of the dewatering cylinder of the dewatering mechanism is provided with a air supply module, the air supply module is located at the end part of the feed inlet of the dewatering mechanism, the other end of the outer space of the dewatering cylinder of the dewatering mechanism away from the air supply module is provided with a gas collection chamber, a plurality of sensors with different functions are arranged in the gas collection chamber, and the sensors are used for monitoring air parameters; The system control unit is configured to control the air supply module to drive the air in the dewatering mechanism to form a spiral airflow path, so that the airflow flows from the end of the air supply module to the end of the gas collection chamber, and the sensors are triggered to monitor the gas composition, temperature, humidity and other parameters in the airflow in real time; An inert gas supplement module is integrally arranged on the cylinder body of the dewatering mechanism, the inert gas supplement module is signal connected with the system control unit, when the sensor detects that the concentration of flammable and explosive gas in the dewatering mechanism exceeds the preset safety threshold, the system control unit starts the inert gas supplement module, and the inert gas is supplemented to the cylinder body, the feed end and the discharge end of the dewatering mechanism and other specified positions, so as to maintain a safe working environment.

[0006] Further, a discharging rubber sleeve is arranged between the feeding port of the dewatering mechanism and the discharging port of the recycling crusher, and the upper and lower ends of the discharging rubber sleeve are respectively in sealing connection with the discharging port of the recycling crusher and the feeding port of the dewatering mechanism.

[0007] Further, the liquid curtain covering mechanism comprises a mounting frame, and the mounting frame is fixedly embedded in the inner wall of the feeding port of the recycling crusher; the inner wall of the mounting frame is sequentially and fixedly provided with a first inclined strip and a second inclined strip from top to bottom; and the interiors of the first inclined strip and the second inclined strip are independent of each other.

[0008] Further, the first inclined strip and the second inclined strip are both inclined surfaces, and the inclined directions of the first inclined strips and the second inclined strips on the four surfaces of the inner wall of the mounting frame are all towards the center position of the feeding port of the recycling crusher.

[0009] Further, the inclined surface of the first inclined strip is arrayed with liquid curtain injection holes, and the inclined surface of the second inclined strip is arrayed with injection holes; and the liquid columns sprayed from the liquid curtain injection holes and the injection holes are both parabolic towards the center position of the feeding port of the recycling crusher.

[0010] Further, the liquid curtain injection holes are circular, and the injection holes are elliptical; the liquid spray height of the liquid curtain injection holes is greater than the water spray height of the injection holes; the fine liquid columns sprayed from the liquid curtain injection holes present multiple liquid curtains to block the flying dust; and the injection holes spray a large amount of liquid columns to make the waste material broken into a slurry.

[0011] Further, the outer wall of the feeding port of the recycling crusher is fixedly provided with a flow divider valve, the flow divider valve has two liquid outlets for injecting liquid into the first inclined strip and the second inclined strip respectively, the liquid inlet end of the flow divider valve is connected with a water pump through a pipeline, and the liquid suction end of the water pump is connected with the recycling crusher through a water suction pipe to extract the liquid dewatered by the dewatering mechanism and re-abstract into the liquid curtain covering mechanism.

[0012] Further, the air supply module comprises multiple air fans, and the air outlets of all the air fans are provided with threaded strips for spraying air from the air outlets in a horizontal spiral shape, the spiral air flow can roll away the gas in the surrounding corners, and one side of the air inlet of the air supply module is close to the feeding port of the dewatering mechanism, so that the broken area presents a negative pressure state and air cannot flow out from the crushing port.

[0013] Further, the inside of the air collecting chamber is fixedly provided with an inclined plate strip, the inclined plate strip is inclined in the air collecting chamber, all the sensors are arranged on the inclined plate strip, the inclined plate strip divides the inside of the air collecting chamber into two parts, all the gases to be discharged first pass through the sensors, and the inclined plate strip can detect data at different heights.

[0014] Further, the top of the air collecting chamber is provided with a waste gas recovery port, and the recycling crusher and the dewatering mechanism both have one discharge port of the waste gas recovery port, and the waste gas recovery port can be connected with a treatment device through a pipeline.

[0015] The present application has the advantages of: The present application sets a liquid curtain covering mechanism at the feed inlet of the recycling crusher, sprays alkaline diluent, effectively suppresses the flying of dust in the crushing process, reduces the risk of dust explosion, improves the working environment, and makes the crushed waste directly in slurry form, facilitating subsequent processing. The air supply module and the gas collection chamber are arranged outside the dewatering mechanism, and a directional spiral airflow is formed by driving of the system control unit, and the airflow parameters are monitored in real time by the multifunctional sensor, so that harmful or flammable and explosive gases that may be generated in the dewatering process can be found and warned in time, and the process safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the internal structure of the recycling crusher of the present application; Figure 3 is a schematic diagram of the left view structure of the dewatering mechanism of the present application; Figure 4 is a schematic diagram of the internal structure of the dewatering mechanism of the present application; Figure 5 is a schematic diagram of the mounting frame structure of the present application; Figure 6 is a schematic diagram of the Figure 5 is an enlarged schematic diagram of position A in the present application; Figure 7 is a schematic diagram of the left view structure of the mounting frame of the present application.

[0017] In the figure: 11, recycling crusher; 12, waste gas recovery port; 2, liquid curtain covering mechanism; 21, water suction pump; 22, water suction pipe; 23, flow divider; 24, mounting frame; 25, first inclined strip; 26, second inclined strip; 27, liquid curtain injection hole; 28, injection hole; 3, dewatering mechanism; 31, air supply module; 32, inclined plate strip; 33, sensor; 34, gas collection chamber; 35, discharging rubber sleeve; 4, inert gas supplement module. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0019] As Figures 1-7As shown, a waste recycling device for electrolytic aluminum production comprises: A recycling crusher 11 is provided with a liquid curtain covering mechanism 2 at its feed inlet, which is configured to spray alkaline diluent to the feed inlet to make the crushed waste into a slurry; A dewatering mechanism 3 is used in combination with the recycling crusher 11, and the feed end of the dewatering mechanism 3 is connected to the discharge end of the recycling crusher 11 for solid-liquid separation treatment of the slurry waste; The dewatering mechanism 3 is provided with an air supply module 31 outside the dewatering cylinder, which is located at the end of the feed inlet of the dewatering mechanism 3, and the other end of the dewatering mechanism 3 away from the air supply module 31 is provided with a gas collection chamber 34, and a plurality of sensors 33 of different functions are arranged in the gas collection chamber 34, which are used to monitor air parameters; A system control unit is configured to control the air supply module 31 to form a spiral airflow path in the dewatering mechanism 3, so that the airflow flows from the end of the air supply module 31 to the end of the gas collection chamber 34, and the sensors 33 are triggered to monitor the gas composition, temperature, humidity and other parameters in the airflow in real time; An inert gas supplement module 4 is integrated on the cylinder of the dewatering mechanism 3, and the inert gas supplement module 4 is signal connected with the system control unit, when the sensors 33 detect that the concentration of flammable and explosive gas in the dewatering mechanism 3 exceeds the preset safety threshold, the system control unit starts the inert gas supplement module 4 to supplement inert gas to the inside of the cylinder, the feed end, the discharge end and other specified positions of the dewatering mechanism 3, so as to maintain a safe working environment.

[0020] A discharge rubber sleeve 35 is arranged between the feed inlet of the dewatering mechanism 3 and the discharge outlet of the recycling crusher 11, and the upper and lower ends of the discharge rubber sleeve 35 are sealingly connected with the discharge outlet of the recycling crusher 11 and the feed inlet of the dewatering mechanism 3, respectively.

[0021] The liquid curtain covering mechanism 2 comprises a mounting frame 24 fixedly embedded in the inner wall of the feed inlet of the recycling crusher 11, and the inner wall of the mounting frame 24 is sequentially provided from top to bottom with a first inclined strip 25 and a second inclined strip 26, and the interiors of the first inclined strip 25 and the second inclined strip 26 are independent of each other.

[0022] Both the first inclined strip 25 and the second inclined strip 26 are inclined surfaces, and the inclined directions of the first inclined strip 25 and the second inclined strip 26 on the four surfaces of the inner wall of the mounting frame 24 are all towards the center position of the feed inlet of the recycling crusher 11.

[0023] The inclined surface of the first inclined strip 25 is arrayed with liquid curtain injection holes 27, and the inclined surface of the second inclined strip 26 is arrayed with injection holes 28, and the liquid columns sprayed from the liquid curtain injection holes 27 and the injection holes 28 are both parabolic towards the center position of the feed inlet of the recycling crusher 11.

[0024] The liquid curtain spray hole 27 is circular, and the injection hole 28 is elliptical. The liquid curtain spray hole 27 sprays liquid at a height greater than the water injection height of the injection hole 28. The fine liquid column sprayed by the liquid curtain spray hole 27 forms multiple liquid curtains to block dust, and the injection hole 28 sprays a large amount of liquid column to break the waste into a slurry.

[0025] The outer wall of the feed inlet of the recycling crusher 11 is fixedly provided with a flow divider 23. The flow divider 23 has two liquid outlets for injecting liquid into the first inclined strip 25 and the second inclined strip 26, respectively. The liquid inlet end of the flow divider 23 is connected with a water suction pump 21 through a pipeline, and the liquid suction end of the water suction pump 21 is connected in the recycling crusher 11 through a water suction pipe 22, for pumping the liquid discharged by the dewatering mechanism 3 back into the liquid curtain covering mechanism 2.

[0026] The air supply module 31 includes a plurality of air fans. The air outlets of all the air fans are provided with threaded strips for spraying air from the air outlets in a transverse spiral shape. The spiral air flow can roll away the gas in the surrounding corners. The side of the air inlet of the air supply module 31 is close to the feed inlet of the dewatering mechanism 3, so that the crushing area is in a negative pressure state and air cannot flow out of the crushing port.

[0027] The inside of the gas collection chamber 34 is fixedly provided with an inclined plate strip 32, which is inclined in the gas collection chamber 34. All the sensors 33 are arranged on the inclined plate strip 32. The inclined plate strip 32 divides the inside of the gas collection chamber 34 into upper and lower parts. All the gases to be discharged pass through the sensors 33 first, and the inclined plate strip 32 can detect data at different heights.

[0028] The top of the gas collection chamber 34 is provided with a waste gas recovery port 12. The recycling crusher 11 and the dewatering mechanism 3 each have one discharge port of the waste gas recovery port 12. The waste gas recovery port 12 can be connected with a treatment device through a pipeline.

[0029] Feeding, crushing and liquid curtain dust suppression and neutralization stage: The electrolytic aluminum waste (such as overhaul slag, anode residue covering material, etc.) is put into the feed inlet of the recycling crusher 11. At the same time, the liquid curtain covering mechanism 2 is started. The alkaline dilute liquid (such as low-concentration NaOH solution) is pumped into the first inclined strip 25 and the second inclined strip 26 in the mounting frame 24 through the water suction pump 21 and the flow divider 23.

[0030] The liquid curtain spray hole 27 (circular) on the first inclined strip 25 sprays fine and high-speed liquid column, forming a dense liquid curtain covering the cross section of the feed inlet. The droplet size can be controlled within 50-150 μm, which can effectively capture dust particles with a particle size greater than 10 μm, and the suppression efficiency can reach more than 95%. The parabolic trajectory of the liquid curtain ensures that it converges in the center to form a three-dimensional barrier.

[0031] The injection holes 28 (elliptical) on the second oblique strip 26 spray liquid columns with larger flow and wider coverage, which mainly serves to provide sufficient liquid to mix with the waste in the crushing process. The acidic components such as fluorides often contained in the waste react with the alkaline diluent, and at the same time, the activity of fluoride ions is reduced.

[0032] The synergistic effect of the two liquid streams causes the waste to quickly form a slurry during the crushing process, fundamentally eliminating the risk of dust explosion generated by dry crushing, and suppressing the release of potential acidic gases in the liquid phase.

[0033] Slurry transfer and sealing: The slurry formed after crushing enters the dewatering mechanism 3 through the discharge port of the recycling crusher 11. The flexible sealing connection between the two is achieved through the discharge rubber sleeve 35, which effectively prevents material splashing and gas escaping at the connection, maintaining a closed environment inside the system.

[0034] Solid-liquid separation and directional airflow control stage: The slurry enters the dewatering cylinder of the dewatering mechanism 3 such as a screw filter press for solid-liquid separation. During this process, the system control unit starts the air supply module 31. The air supply module 31 is composed of multiple fans, and the threads on the air outlet design of the module cause the ejected air to have a tangential velocity, forming a horizontal spiral airflow.

[0035] This spiral airflow flows from the feed side (end of the air supply module 31) to the discharge side (end of the air collection chamber 34) in the space outside the dewatering cylinder (i.e., the interlayer between the cylinder wall and the outer shell). According to the principles of fluid mechanics, a stable spiral flow field helps to reduce airflow dead angles, achieving effective capture and transport of gases volatilized in the entire length of the cylinder.

[0036] The establishment of the spiral airflow, combined with the sealing of the discharge rubber sleeve 35, causes the entire crushing and feeding area to be in a slightly negative pressure state relative to the external atmosphere (for example, the pressure is maintained at -50 to -100 Pa). This conforms to Bernoulli's principle, i.e., the increase in airflow velocity leads to a decrease in static pressure. This negative pressure can effectively prevent any harmful gases or dust from escaping from the feed port in the opposite direction, ensuring that pollutants "only enter and do not exit".

[0037] Environmental monitoring and intelligent judgment stage: The spiral airflow carries gases that may be volatilized during the dewatering process (such as hydrogen, a small amount of hydrocarbons, and water vapor) into the air collection chamber 34. In the air collection chamber 34, the gas must flow through the multiple sensors 33 arranged in an array on the inclined slats 32.

[0038] The design of the inclined slats 32 divides the airflow channel, allowing the gas to flow evenly through the sensors 33 at different heights, avoiding monitoring blind spots and obtaining more representative average values ​​of spatial gas parameters. Sensors 33 typically include, but are not limited to: combustible gas sensors (monitoring the lower explosive limit), oxygen sensors, temperature sensors, and humidity sensors.

[0039] The system control unit collects data from sensor 33 in real time. When the concentration of flammable and explosive gas LEL exceeds the preset safety threshold (for example, 20% of LEL is set as the warning and action threshold), the system immediately determines that it is a potentially dangerous state.

[0040] Active security protection phase: Once the system control unit determines that the gas concentration exceeds the limit, it immediately sends a command to the inert gas replenishment module 4. This module is usually connected to a nitrogen or argon gas source and quickly injects inert gas into multiple key locations such as the inside of the dehydration mechanism 3 cylinder, the feed end, and the discharge end.

[0041] Its safety principle involves injecting inert gas to reduce the oxygen concentration in the hazardous area below the limit concentration that supports combustion (typically, reducing the oxygen content to below 12% can effectively suppress the combustion of most combustibles). The required inert gas replenishment amount (Q) can be quickly calculated and adjusted based on the monitored hazardous gas concentration, system space volume (V), and expected dilution rate: Q ∝ (C_hazardous gas * V) / t, where C is the concentration and t is the time required to reach the safe concentration. The system can initiate replenishment within seconds, rapidly restoring the environment to a safe state.

[0042] Resource recycling and waste gas treatment: The liquid (alkaline diluent) separated by the dehydration unit 3 is pumped back to the liquid curtain covering unit 2 by the water pump 21 through the water pump pipe 22 for recycling, realizing closed-loop utilization of liquid resources and reducing wastewater discharge and consumption of fresh alkali solution. The exhaust gas monitored by the sensor 33 is finally discharged through the exhaust gas recovery port 12 and can be connected to the central flue gas treatment system for deep purification to achieve emission standards.

[0043] Intrinsic Safety and Active Protection: This invention creatively integrates four major safety strategies: "liquid curtain dust suppression and neutralization," "closed negative pressure conveying," "real-time environmental monitoring," and "automatic inerting protection." In particular, through real-time monitoring by sensor 33 and rapid response by inert gas replenishment module 4, it transforms passive defense into active intervention, intervening before the concentration of flammable and explosive gases reaches the dangerous critical point. This completely eliminates the possibility of fire and explosion accidents caused by friction, collision, and heat generation during the crushing and dehydration process of electrolytic aluminum waste (especially materials containing aluminum, carbon, and residual electrolytes), thus achieving intrinsic safety in the production process.

[0044] High-efficiency dust suppression and pollution source control: The liquid curtain covering mechanism 2 adopts a collaborative design of double layers (the first inclined strip 25 and the second inclined strip 26) and special-shaped nozzles (the liquid curtain nozzle 27 and the injection hole 28), which takes into account the dual functions of "dust suppression" and "slurry mixing". At the crushing source, the dust is wet captured and forms slurry, the dust removal efficiency is extremely high, which greatly improves the working environment, reduces the material loss, and effectively neutralizes the acidic components in the waste materials.

[0045] Intelligent monitoring and precise management: The system control unit serves as the "brain" to coordinate the air supply, monitoring, inerting and other units. The sensor 33 array on the inclined plate strip 32 realizes comprehensive and layered monitoring of the air composition, and the data is more scientific and reliable. All safety parameters such as gas concentration, temperature and pressure can realize real-time display, recording and early warning, which provides precise data support for process optimization and safety management.

[0046] The above describes the embodiments of the present application, but the present application is not limited to the specific embodiments described above, which are only illustrative and not limiting. Those skilled in the art can make many forms under the inspiration of the present embodiments, which are all within the protection of the present embodiments.

Claims

1. A waste recycling device for electrolytic aluminum production, characterized in that, include: The recycling crusher (11) is provided with a liquid curtain covering mechanism (2) at the feed inlet. The liquid curtain covering mechanism (2) is configured to spray an alkaline diluent onto the feed inlet so that the crushed waste material is in a slurry state. The dewatering mechanism (3) is used in combination with the recycling crusher (11). The feed end of the dewatering mechanism (3) is connected to the discharge end of the recycling crusher (11) for solid-liquid separation of slurry waste. Among them, the dehydration mechanism (3) has an air supply module (31) in the outer space of the dehydration cylinder. The air supply module (31) is located at the feed inlet side end of the dehydration mechanism (3). The other end of the outer space of the dehydration cylinder of the dehydration mechanism (3) away from the air supply module (31) is provided with an air collection chamber (34). The air collection chamber (34) is equipped with multiple sensors (33) with different functions. The sensors (33) are used to monitor air parameters. The system control unit is configured to control the air supply module (31) to drive the air in the dehydration mechanism (3) to form a spiral airflow path, so that the airflow flows directionally from the end of the air supply module (31) to the end of the air collection chamber (34), and trigger the sensor (33) to monitor the gas composition, temperature, humidity and other parameters in the airflow in real time. An inert gas replenishment module (4) is integrated on the cylinder of the dehydration mechanism (3). The inert gas replenishment module (4) is connected to the system control unit. When the sensor (33) detects that the concentration of flammable and explosive gas in the dehydration mechanism (3) exceeds the preset safety threshold, the system control unit activates the inert gas replenishment module (4) to replenish inert gas to multiple designated locations such as the inside of the cylinder, the feed end, and the discharge end of the dehydration mechanism (3) in order to maintain a safe working environment.

2. The waste recycling device for electrolytic aluminum production according to claim 1, characterized in that, A feeding sleeve (35) is provided between the feed inlet of the dehydration mechanism (3) and the discharge outlet of the recycling crusher (11). The upper and lower ends of the feeding sleeve (35) are respectively sealed and connected to the discharge outlet of the recycling crusher (11) and the feed inlet of the dehydration mechanism (3).

3. The waste recycling device for electrolytic aluminum production according to claim 1, characterized in that, The liquid curtain covering mechanism (2) includes a mounting frame (24), and the mounting frame (24) is fixedly embedded in the inner wall of the feed inlet of the recycling crusher (11). The inner wall of the mounting frame (24) is fixedly provided with a first inclined strip (25) and a second inclined strip (26) from top to bottom. The first inclined strip (25) and the second inclined strip (26) are independent of each other.

4. The waste recycling device for electrolytic aluminum production according to claim 3, characterized in that, Both the first inclined bar (25) and the second inclined bar (26) are inclined surfaces. The inclination directions of the first inclined bar (25) and the second inclined bar (26) on the four sides of the inner wall of the mounting frame (24) are all towards the center of the feed inlet of the recycling crusher (11).

5. A waste recycling device for electrolytic aluminum production according to claim 4, characterized in that, The inclined surface of the first inclined bar (25) is arrayed with liquid curtain spray holes (27), and the inclined surface of the second inclined bar (26) is arrayed with injection holes (28). The liquid columns ejected by the liquid curtain spray holes (27) and the injection holes (28) are both parabolic in shape toward the center of the feed inlet of the recycling crusher (11).

6. A waste recycling device for electrolytic aluminum production according to claim 5, characterized in that, The liquid curtain nozzle (27) is round, and the injection nozzle (28) is elliptical. The liquid spray height of the liquid curtain nozzle (27) is greater than the water spray height of the injection nozzle (28). The fine liquid columns sprayed from the liquid curtain nozzle (27) form multiple liquid curtains to block flying dust. The injection nozzle (28) sprays out a large number of liquid columns, so that the waste material is crushed into a mud-like state.

7. A waste recycling device for electrolytic aluminum production according to claim 6, characterized in that, A diversion valve (23) is fixedly installed on the outer wall of the feed inlet of the recycling crusher (11). The diversion valve (23) has two liquid outlets, which inject liquid into the first inclined bar (25) and the second inclined bar (26) respectively. The liquid inlet of the diversion valve (23) is connected to a water pump (21) through a pipe, and the liquid suction end of the water pump (21) is connected to the recycling crusher (11) through a water suction pipe (22) for extracting the liquid extracted by the dehydration mechanism (3) and re-injecting it into the liquid curtain covering mechanism (2).

8. The waste recycling device for electrolytic aluminum production according to claim 1, characterized in that, The air supply module (31) includes multiple fans. All fans have threaded strips at their outlets so that air is ejected from the outlets in a horizontal spiral shape. The spiral airflow will carry away the gas in the surrounding corners. Furthermore, the air inlet of the air supply module (31) is close to the feed inlet of the dehydration mechanism (3), thereby creating a negative pressure state in the crushing area so that no air will flow out from the crushing outlet.

9. A waste recycling device for electrolytic aluminum production according to claim 1, characterized in that, An inclined slat (32) is fixedly installed inside the gas collection chamber (34), and the inclined slat (32) is inclined in the gas collection chamber (34). All sensors (33) are arranged on the inclined slat (32). The inclined slat (32) divides the interior of the gas collection chamber (34) into upper and lower parts. All gases to be discharged first pass through the sensors (33), and the inclined discharge can detect data at different heights.

10. A waste recycling device for electrolytic aluminum production according to claim 9, characterized in that, The gas collection chamber (34) is provided with a waste gas recovery port (12) above it. Both the recovery crusher (11) and the dehydration mechanism (3) have a waste gas recovery port (12) with an outlet inside. The waste gas recovery port (12) can be connected to the processing equipment through a pipeline.

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