CN220513834U - Gas filtering and protecting device for aluminum ash sealing conveyer - Google Patents

Abstract

The utility model discloses a gas filtering and protecting device of an aluminum ash sealing and transporting device, which comprises a carrier and a filtering system, wherein the carrier is used for storing aluminum ash, the filtering system is arranged at the top end of the inside of the carrier and comprises a plurality of air inlet devices, filtering devices and air outlet devices, one end of each air inlet device is communicated with the inside space of the carrier, one end of each air outlet device penetrates out of the carrier to be communicated with the outside of the carrier, and the plurality of filtering devices are sequentially communicated along the gas flowing direction, wherein the filtering device positioned at the first position is also communicated with the air inlet device, the filtering device positioned at the last position is also communicated with the air outlet device, and each filtering device is filled with absorbent. In the embodiment, the filter system is arranged in the carrier, and can absorb toxic and harmful gases such as phosphine and the like generated by hydrolysis reaction of the aluminum ash and moisture in the air, so that the pollution of the toxic gases generated by hydrolysis reaction in the transportation process of the aluminum ash to the atmosphere is effectively avoided, and the safe and environment-friendly transportation of the aluminum ash is realized.

Description

Gas filtering and protecting device for aluminum ash sealing conveyer

Technical Field

The utility model relates to the technical field of aluminum ash conveying devices, in particular to a gas filtering and protecting device of an aluminum ash airtight conveying device.

Background

Aluminum ash, which is a dangerous solid waste produced in the aluminum industry, is usually subjected to harmless treatment by an aluminum ash treatment plant, and because the aluminum ash treatment plant needs to invest a series of huge and complex special treatment equipment, the aluminum ash treatment plant cannot be constructed in a large amount, and the dispersed aluminum ash needs to be transported to the aluminum ash treatment plant for centralized treatment.

However, in the prior art, there is no special transportation equipment for aluminum ash, since aluminum ash generally has the following composition: metal aluminum, aluminum nitride, aluminum oxide, chloride, fluoride and the like, so that in the transportation process, aluminum ash is easy to generate hydrolysis reaction when in contact with water vapor in the air, thereby generating a large amount of toxic and harmful dangerous gases such as ammonia gas, phosphine, hydrogen sulfide and the like, causing great pollution to the environment and having great danger.

Disclosure of Invention

The utility model provides a gas filtering and security device of an aluminum ash sealing and transporting device, which aims at overcoming the defects of the prior art and comprises the following components:

the carrier is used for storing aluminum ash;

the filtering system is arranged at the top end of the inside of the carrier and comprises a plurality of air inlet devices, filtering devices and air outlet devices, one ends of the air inlet devices are communicated with the inner space of the carrier, one ends of the air outlet devices penetrate out of the carrier and are communicated with the outside of the carrier, the filtering devices are sequentially communicated along the air flowing direction, the filtering devices at the first position are communicated with the air inlet devices, the filtering devices at the last position are communicated with the air outlet devices, and the absorbent is filled in each filtering device.

According to an embodiment of the present utility model, the filter system further comprises a breathing device, wherein the breathing device is arranged on the top of the carrier adjacently to the filter system, one end of the breathing device is located in the carrier, and the other end of the breathing device penetrates out of the carrier.

According to one embodiment of the utility model, each filtering device comprises a filtering tank and an air inlet pipe, wherein the top end of the side wall of the filtering tank is provided with an air inlet and an air outlet which are oppositely arranged, one end of the air inlet pipe is positioned at the air inlet, the other end of the air inlet pipe is bent and extends to the bottom end of the inside of the filtering tank, and the absorbent is filled in the filtering tank.

According to an embodiment of the present utility model, each filtering device further includes a diffusion plate, the diffusion plate is disposed inside the filtering tank and near the bottom end of the filtering tank, a gas diffusion space and a gas filtering space are respectively formed between the diffusion plate and the bottom end of the filtering tank and between the diffusion plate and the top end of the filtering tank, communication holes and multiple groups of diffusion holes are respectively disposed along the radial direction of the diffusion plate, the communication holes are located at the center of the diffusion plate, the multiple groups of diffusion holes are all concentrically disposed with the communication holes, one end of the gas inlet pipe is connected to the gas inlet, the other end of the gas inlet pipe is connected to the telescopic communication hole in a bending manner, two ends of the diffusion holes are respectively communicated with the gas diffusion space and the gas filtering space, the gas outlet is communicated with the gas filtering space, and the absorbent is filled in the gas filtering space.

According to an embodiment of the present utility model, the inner diameters D of the plurality of groups of diffusion holes gradually increase from the center of the diffusion plate to the circumference.

According to an embodiment of the utility model, the air inlet device comprises an air inlet pipe, one end of the air inlet pipe is communicated with the interior of the carrier, the other end of the air inlet pipe is communicated with the filtering device, and the air inlet pipe is filled with granular filtering substances.

According to one embodiment of the utility model, the air outlet device comprises an air outlet valve and an air outlet pipe, one end of the air outlet valve is communicated with the filtering device, one end of the air outlet pipe is communicated with the other end of the air outlet valve, and the other end of the air outlet pipe penetrates through the carrier to be exposed outside the carrier.

According to one embodiment of the utility model, the end of the air outlet pipe outside the carrier is provided with a bending angle beta, and the bending angle beta is 90-180 degrees.

According to one embodiment of the utility model, the breathing apparatus comprises a breathing valve and a communicating tube, the breathing valve is arranged outside the carrier and is provided with an air suction port, an air discharge port and a communicating port, one end of the communicating tube is communicated with the communicating port, the other end of the communicating tube is arranged in the carrier, and the communicating tube is filled with a drying agent and a particle filtering substance.

According to one embodiment of the present utility model, the communicating tube includes a tube body, a first filling tube and a second filling tube, wherein one end of the tube body is communicated with the breather valve, one end of the first filling tube is communicated with the other end of the tube body, one end of the second filling tube is communicated with the other end of the first filling tube, the other end of the second filling tube is communicated with the inside of the carrier, the desiccant is filled in the first filling tube, and the particulate filter material is filled in the second filling tube.

In the embodiment, the filter system is arranged in the carrier, and can absorb toxic and harmful gases such as phosphine, hydrogen sulfide, ammonia gas and the like generated by hydrolysis reaction of the aluminum ash and moisture in the air, so that the pollution of the toxic and harmful gases generated by hydrolysis reaction in the transportation process of the aluminum ash to the atmosphere is effectively avoided, and the safe and environment-friendly transportation of the aluminum ash is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a gas filtering and protecting device of an aluminum ash airtight transportation device in an embodiment;

FIG. 2 is a schematic cross-sectional view of a filter system and a breathing apparatus according to an embodiment;

FIG. 3 is a schematic diagram of a respiratory apparatus according to an embodiment;

FIG. 4 is a schematic view of a diffusion plate structure according to an embodiment.

In the accompanying drawings:

00. an absorbent; 001. a mixture of soda lime; 002. an ammonia absorber; 003. activated carbon;

01. particulate filter material;

02. a drying agent;

1. a carrier;

2. a filtration system; 21. an air intake device; 211. an air inlet pipe; 22. a filtering device; 221. a filter tank; 2211. an air inlet; 2212. an air outlet; 2213. a gas diffusion space; 2214. a gas filtering space; 223. a filter plate; 2231. a communication hole; 2232. diffusion holes; 23. an air outlet device; 231. an air outlet valve; 232. an air outlet pipe;

3. a breathing apparatus; 31. a respiratory valve; 311. an air suction port; 312. an exhalation port; 313. a communication port; 32. a communicating pipe; 321. a tube body; 322. a first filling tube; 323. and a second filling tube.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a gas filtering and protecting device of an aluminum ash sealed transportation device in an embodiment, fig. 2 is a schematic structural diagram of a filtering system and a breathing device in an embodiment, and fig. 3 is a schematic structural diagram of a breathing device in an embodiment. The utility model provides a gas filtration and safety device of airtight conveyer of aluminium lime-ash in this case, including carrier 1 and filtration system 2, the top of carrier 1 inside is located to filtration system 2, it includes air inlet unit 21, filter equipment 22 and air outlet unit 23, filter equipment 22 is equipped with a plurality ofly, air inlet unit 21 one end and carrier 1 inner space intercommunication, air outlet unit 23 one end wears out carrier 1 and carrier 1 outside intercommunication, along the gas flow direction, among a plurality of filter equipment 23, the filter equipment 22 that is located the first communicates with air inlet unit 21 and air outlet unit 23 respectively, the filter equipment 22 that is located the middle part communicates with two adjacent filter equipment 22 respectively. The filter device 22 is filled with the absorbent 00, during operation, aluminum ash is stored in the carrier 1, hydrolysis reaction is carried out on the aluminum ash and moisture in the air, toxic and dangerous gases such as hydrogen sulfide, phosphine, ammonia gas and the like are generated, the gases enter the filter device from the air inlet device 21, the absorbent 00 absorbs the hydrogen sulfide, the phosphine, the ammonia gas and peculiar smell in the gases respectively, the gases filtered by the filter device 22 are discharged out of the carrier 1 from the air outlet device 23, and serious pollution to the atmosphere caused by the gases generated by the hydrolysis reaction between the aluminum ash and the moisture in the air in the transportation process is effectively avoided. In the specific implementation, the carrier 1 can be a closed type transportation device such as a container, a bulk container, a tank body of a powder and particle material transportation tank car or the like.

In this example, three filtering devices 22 are respectively a first filtering device, a second filtering device and a third filtering device along the movement direction of the gas, the absorbent 00 filled in the first filtering device is a soda lime mixture 001, the absorbent 00 filled in the second filtering device is an ammonia absorbent 002, the absorbent 00 filled in the third filtering device is activated carbon 003, wherein the soda lime mixture 001 can be composed of calcium oxide, water, sodium hydroxide and potassium hydroxide, the ammonia absorbent 002 can be commercial chloride ion salt, when the gas has an air inlet device 21 and enters the first filtering device, hydrogen sulfide and phosphine in the gas are absorbed by the soda lime mixture 001, when the gas enters the second filtering device, ammonia in the gas is absorbed by the ammonia absorbent 002, when the gas enters the third filtering device, peculiar smell in the gas is absorbed by the activated carbon 003, and finally the peculiar smell in the gas is discharged out of the carrier 1 through an air outlet device 23.

Referring back to fig. 1-3, further, the air filtering and protecting device of the aluminum ash airtight transportation device in this example further comprises a breathing device 3, wherein the breathing device 3 and the filtering system 2 are adjacently arranged at the top of the carrier 1, one end of the breathing device is positioned in the carrier 1, and the other end of the breathing device penetrates out of the carrier 1. The breathing device 3 can suck the external gas of the carrier 1 into the carrier 1, the gas can be dried in the sucking process, the gas entering the carrier 1 is in a dry state, the hydrolysis reaction of aluminum ash slag in the carrier 1 and the moisture in the air is greatly reduced to generate toxic and dangerous gas, when the air pressure in the carrier 1 reaches a certain value, the breathing device 3 stops sucking the gas, and meanwhile, the gas in the carrier 1 can be discharged through the breathing device 3. Namely, when the filtering system 2 has faults such as pipeline blockage and the like, the breathing device 3 can inhibit the hydrolysis degree of the aluminum ash, reduce the generation of dangerous gas, avoid potential safety hazards such as explosion and the like caused by overlarge pressure in the carrier 1 and incapability of pressure relief, and greatly improve the safety and environmental protection performance of the aluminum ash during transportation.

Referring to fig. 4, and referring back to fig. 1-3, fig. 4 is a schematic view of a diffusion plate structure according to an embodiment. Further, each filter device 22 includes a filter tank 221 and an air inlet conduit 222, wherein the top end of the sidewall of the filter tank 221 has an air inlet 2211 and an air outlet 2212 which are opposite to each other, one end of the air inlet conduit 222 is located at the air inlet 2211, the other end is bent and extended to the bottom end of the filter tank 221, and the absorbent 00 is filled in the filter tube 221.

Specifically, each filter device 22 further includes a diffusion plate 223, the diffusion plate 223 is disposed inside the filter tank 221 and near the bottom end of the filter tank 221, a gas diffusion space 2213 and a gas filtration space 2214 are respectively formed between the diffusion plate 223 and the bottom end of the filter tank 221, a communication hole 2231 and a plurality of groups of diffusion holes 2232 are respectively formed along the radial direction of the diffusion plate 223, the communication hole 2231 is located at the center of the diffusion plate 223, the plurality of groups of diffusion holes 2232 are all concentrically arranged with the communication hole 2231, one end of the air intake conduit 222 is connected to the air intake 2211, the other end is connected to the telescopic communication hole 2231 in a bending manner, two ends of the diffusion hole 2232 are respectively communicated with the gas diffusion space 2213 and the gas filtration space 2214, the air outlet 2212 is communicated with the gas filtration space 2214, and the absorbent 00 is filled in the gas filtration space 2214. The gas enters the gas diffusion space 2213 of the filter tank 221 through the gas inlet pipe 222, enters the gas filtration space 2214 through the diffusion holes 2232 of the diffusion plate 223 respectively, then reacts with the absorbent 00 in the gas filtration space 2214, and the absorbed gas is discharged out of the filter tank 221 through the gas outlet 2212, so that the contact area between the gas and the absorbent 00 in the filter tank 221 is effectively increased, the reaction efficiency of the gas and the absorbent 00 is improved, and the stability of a product is further improved.

Preferably, the inner diameters D of the plurality of groups of diffusion holes 2232 gradually increase from the center of the diffusion plate 223 to the circumferential direction. Thus, the gas is more uniformly dispersed and passes through the diffusion holes 2232 of the diffusion plate 223 after entering the gas diffusion space 2213, so that the uniformity of the gas entering the gas filtration space 2214 is further improved, and the stability of the product is further improved.

Referring back to fig. 1-2, further, the air inlet device 21 includes an air inlet pipe 211, one end of which is communicated with the interior of the carrier 1, and the other end of which is communicated with the filtering device 22, and the air inlet pipe 211 may be filled with a particulate filtering material 01, in this example, glass wool, when the air enters the filtering device 22 through the air inlet pipe 211, the particulate filtering material 01 may filter tiny particles of aluminum ash carried in the air, so as to avoid affecting the reaction between the air and the absorbent 00, thereby effectively improving the stability of the reaction between the air and the absorbent 00.

Preferably, in the implementation, a dust-collecting filter cloth may be further disposed at the connection between the air inlet pipe 211 and the filtering device 22, so as to better filter the tiny particles of the aluminum ash carried in the air.

Referring back to fig. 1-2, further, the air outlet device 23 includes an air outlet valve 231 and an air outlet pipe 232, one end of the air outlet valve 231 is communicated with the filtering device 22, one end of the air outlet pipe 232 is communicated with the other end of the air outlet valve 231, and the other end of the air outlet pipe passes through the carrier 1 to be exposed outside the carrier 1. In this example, the air outlet valve 231 adopts a check valve, so that air in the atmosphere can be effectively prevented from flowing back into the carrier 1 through the air outlet device 23, thereby affecting the absorption efficiency of the absorbent 00 in the filtering device, preventing the hydrolysis speed of aluminum ash in the carrier 1 from being aggravated due to moisture in the atmosphere, and further improving the product stability.

Still further, the end of the outlet tube 232 outside the carrier 1 has a bending angle β of 90 ° -180 °. In this example, the angle of the bending angle β is 180 °, and by bending the air outlet pipe 232, it is possible to effectively prevent clogging caused by backflow of rainwater and other substances in the air outlet pipe 232 in bad weather such as rainy days, and to more effectively improve the stability of the product.

Referring back to fig. 1-3, further, the breathing apparatus 3 includes a breather valve 31 and a communicating tube 32, the breather valve 31 is located outside the carrier 1, and has an air inlet 311, an air outlet 312 and a communicating port 313, one end of the communicating tube 32 is communicated with the communicating port 313, the other end is located in the carrier 1, and the communicating tube 32 is filled with a desiccant 02 and a particulate filter material 01. In this example, the breather valve 31 may be a breather valve in the prior art. In practice, the desiccant 02 may be quicklime.

Specifically, the communicating tube 32 includes a tube body 321, a first filling tube 322, and a second filling tube 322, wherein one end of the tube body 321 is communicated with the breather valve 31, one end of the first filling tube 322 is communicated with the other end of the tube body 321, one end of the second filling tube 323 is communicated with the other end of the first filling tube 322, the other end of the second filling tube 323 is communicated with the inside of the carrier 1, wherein the desiccant 02 is filled in the first filling tube 322, and the particulate filter material 01 is also filled in the second filling tube 323.

When the filter system 2 fails, the breather valve 31 sucks gas from the outside of the carrier 1, the gas enters the first filling pipe 322 through the pipe 311, moisture in the gas is absorbed and dried by the drying agent 02, the dried gas immediately enters the second filling pipe 323, dust and other particles in the gas are adsorbed by the particle filter material 01, so that the gas entering the carrier 1 is dry and free of impurities, the reaction rate of aluminum ash in the carrier 1 is greatly inhibited, when the air pressure in the carrier 1 reaches a certain value, the breather valve 31 stops sucking gas from the outside of the carrier 1, the gas in the carrier 1 is exhaled by the breather valve 31 through the communicating pipe 32, and the carrier 1 is timely decompressed, so that the hidden danger of explosion caused by the excessive air pressure in the carrier 1 is prevented when the filter system 2 fails, and similarly, when the gas in the carrier 1 passes through the second filling pipe 323, the aluminum ash particles carried by the gas are adsorbed by the particle filter material 01, and the aluminum ash particles are prevented from entering the atmosphere to pollute the atmosphere. Because the gas sucked into the carrier is dry gas, the aluminum ash in the carrier cannot generate hydrolysis reaction to generate toxic and harmful gas, so that the breathing device 3 can also prevent the toxic gas from being discharged into the atmosphere to cause serious pollution.

Preferably, in the specific implementation, the end, which is communicated with the inner space of the carrier 1, of the second filling pipe 323 can be covered with dust-collecting filter cloth, the action of which is consistent with that of the particle filtering material 01, and the detailed description is omitted, so that when the gas enters and exits the carrier 1, particles in the gas can be further filtered, and the gas filtering effect is improved.

In summary, when the aluminum ash is required to be transported, the aluminum ash is stored in a carrier, the carrier can be a closed type transportation device such as a container, a bulk container or a tank body of a powder particle material transport vehicle, in the transportation process, the aluminum ash and moisture in the air undergo hydrolysis reaction so as to generate mixed gases such as hydrogen sulfide, phosphine, ammonia and the like, the gases enter a filtering device from an air inlet device, and after being absorbed by absorbing agents in the filtering device, the absorbing agents in the hydrogen sulfide, the phosphine, the ammonia and the peculiar smell in the gases sequentially, the air outlet device discharges the filtered gases outside the carrier, so that serious pollution to the atmosphere caused by the gases generated by the hydrolysis reaction between the aluminum ash and the moisture in the air in the transportation process is effectively prevented, when a filtering system is blocked and other faults occur, the breather valve sucks the gas outside the carrier into the communicating pipe, when the gas passes through the communicating pipe, the drying agent and the particle filtering material filled in the communicating pipe filter the moisture and the particles in the gas, so that the gas entering the carrier keeps dry and has no impurity, thereby inhibiting the reaction rate of aluminum ash in the carrier, when the gas pressure in the carrier reaches a certain value, the breather valve stops sucking the gas, and simultaneously the gas in the carrier is exhaled by the breather valve, and the carrier is decompressed in time, so as to prevent the hidden danger of explosion caused by the overlarge gas pressure in the carrier when the filtering system fails, therefore, as the gas sucked into the carrier is dry gas, the aluminum ash in the carrier can not be hydrolyzed, namely the toxic and harmful gas can not be decomposed, namely, the breather valve has the function of decompressing the carrier, and meanwhile, the breather valve can not cause serious pollution to the environment, greatly improves the safety and environmental protection of the product.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (10)

1. A gas filtering and security device for an aluminum ash closed transport device, comprising:

a carrier (1) for storing the aluminum ash;

the filtering system (2) is arranged at the top end of the inside of the carrier (1), and comprises an air inlet device (21), filtering devices (22) and an air outlet device (23), wherein a plurality of filtering devices (22) are arranged, one end of each air inlet device (21) is communicated with the inner space of the carrier (1), one end of each air outlet device (23) penetrates out of the carrier (1) to be communicated with the outside of the carrier (1), a plurality of filtering devices (22) are sequentially communicated along the air flowing direction, the filtering devices (22) at the first position are further communicated with the air inlet devices (21), the filtering devices (22) at the last position are further communicated with the air outlet devices (23), and each filtering device (22) is filled with an absorbent.

2. The air filtering and protecting device of the aluminum ash sealed transportation device according to claim 1, further comprising a breathing device (3), wherein the breathing device (3) is arranged at the top of the carrier (1) adjacent to the filtering system (2), one end of the breathing device is positioned in the carrier (1), and the other end of the breathing device penetrates out of the carrier (1).

3. The air filtering and protecting device of the aluminum ash sealed transportation device according to claim 1, wherein each filtering device (22) comprises a filtering tank (221) and an air inlet conduit (222), the top end of the side wall of the filtering tank (221) is provided with an air inlet (2211) and an air outlet (2212) which are oppositely arranged, one end of the air inlet conduit (222) is positioned at the air inlet (2211), the other end of the air inlet conduit is bent and extended to the bottom end inside the filtering tank (221), and the absorbent is filled in the filtering tank (221).

4. The gas filtering and protecting device of the aluminum ash sealed transportation device according to claim 3, wherein each filtering device (22) further comprises a diffusion plate (223), the diffusion plate (223) is disposed inside the filtering tank (221) and is close to the bottom end of the filtering tank (221), a gas diffusion space (2213) and a gas filtering space (2214) are respectively formed between the diffusion plate and the bottom end of the filtering tank (221) and the top end of the filtering tank (221), a communication hole (2231) and a plurality of groups of diffusion holes (2232) are respectively penetrating through the diffusion plate (223) along the radial direction of the diffusion plate (223), the communication hole (2231) is located at the center of the diffusion plate (223), a plurality of groups of diffusion holes (2232) are all concentrically disposed with the communication hole (2231), one end of the air inlet conduit (222) is connected to the air inlet (2211), the other end of the diffusion pipe (222) is connected to the telescopic communication hole (2231), two ends of the diffusion holes (2232) are respectively communicated with the gas diffusion space (2213) and the gas filtering space (2214), the gas outlet (2212) is respectively communicated with the gas filtering space (2214), and the gas filtering space (2214) is filled with the gas absorbent in the filtering space (2214).

5. The apparatus for filtering and protecting the gas of the closed aluminum ash conveyer according to claim 4, wherein the inner diameters D of the plurality of groups of the diffusion holes (2232) are gradually increased from the center of the diffusion plate (223) to the circumference.

6. The air filtering and protecting device of the aluminum ash sealed transportation device according to claim 1, characterized in that the air inlet device (21) comprises an air inlet pipe (211), one end of the air inlet pipe is communicated with the interior of the carrier (1), the other end of the air inlet pipe is communicated with the filtering device (22), and the air inlet pipe (211) is filled with granular filtering substances.

7. The air filtering and protecting device of the aluminum ash sealed transportation device according to claim 1, wherein the air outlet device (23) comprises an air outlet valve (231) and an air outlet pipe (232), one end of the air outlet valve (231) is communicated with the filtering device (22), one end of the air outlet pipe (232) is communicated with the other end of the air outlet valve (231), and the other end of the air outlet pipe penetrates out of the carrier (1) to be exposed outside the carrier (1).

8. The air filtering and protecting device of the closed aluminum ash conveyer according to claim 7, characterized in that one end of the air outlet pipe (232) positioned outside the carrier (1) is provided with a bending angle beta, and the bending angle beta is 90-180 degrees.

9. The air filtering and protecting device of the aluminum ash sealed transportation device according to claim 2, characterized in that the breathing device (3) comprises a breathing valve (31) and a communicating pipe (32), the breathing valve (31) is located outside the carrier (1) and is provided with an air suction port (311), an air exhaling port (312) and a communicating port (313), one end of the communicating pipe (32) is communicated with the communicating port (313), the other end of the communicating pipe is located in the carrier (1), and the communicating pipe (32) is filled with a drying agent and a particle filtering substance.

10. The gas filtering and protecting device of the aluminum ash hermetic transport device according to claim 9, characterized in that the communicating pipe (32) comprises a pipe body (321), a first filling pipe (322) and a second filling pipe (323), one end of the pipe body (321) is communicated with the breather valve (31), one end of the first filling pipe (322) is communicated with the other end of the pipe body (321), one end of the second filling pipe (323) is communicated with the other end of the first filling pipe (322), the other end of the second filling pipe is communicated with the inside of the carrier (1), a drying agent is filled in the first filling pipe (322), and a particle filtering material is filled in the second filling pipe (323).