High-efficiency sand removing device

Abstract

The application discloses a high-efficiency sand removing device, which comprises a main body, an air inlet arranged at one end of the main body, an air outlet arranged at the other end of the main body, a wind channel formed in the main body, at least one sand and dust removing module arranged in the wind channel and used for separating sand and dust from airflow, a fan module arranged in the wind channel and between the air outlet and the sand and dust removing module, and a sand and dust recycling module arranged at the lower end of the main body and in communication with the bottom of the sand and dust removing module and used for recycling the separated sand and dust. Through the application of the application, the sand is removed by the sand and dust removing module in an inertia sand removing mode, the sand and dust accumulated at the lower part of the sand removing module is discharged and recycled by the sand and dust recycling module, the sand and dust is prevented from being blocked in the wind channel, and secondary pollution is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sand removal devices, in particular to a high-efficiency sand removal device. Background Art

[0002] Ventilation facilities are often used in areas with high dust levels. However, if appropriate sand removal measures are not implemented, severe pollution will result, and both equipment and personnel will not be able to function properly. Current sand removal measures often rely on traditional physical filters for interception. These traditional physical filters often have a short lifespan and are easily clogged when exposed to large amounts of dust, resulting in poor ventilation. They also require high maintenance frequency and costs, limiting their applicability. Summary of the Invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide a high-efficiency sand removal device, comprising:

[0004] A main body, one end of the main body is provided with an air inlet, the other end of the main body is provided with an air outlet, and an air duct is formed in the main body;

[0005] At least one sand and dust removal module, the sand and dust removal module is arranged in the air duct, and the sand and dust removal module is used to separate the air flow and the dust;

[0006] A fan module, the fan module is arranged in the air duct, and the fan module is arranged between the air outlet and the sand and dust removal module;

[0007] A dust recovery module is provided at the lower end of the main body, the dust recovery module is connected to the bottom of the dust removal module, and the dust recovery module is used to recover the dust separated by the dust removal module.

[0008] In another preferred embodiment, the sand and dust removal module includes: an inertial sand removal structure, a converging guide plate and a mounting portion, the mounting portion is arranged in the air duct, the inertial sand removal structure is arranged on the mounting portion, the converging guide plate is arranged at the output end of the inertial sand removal structure, the input end of the inertial sand removal structure is arranged close to the air inlet, and a first air outlet is opened on the converging guide plate.

[0009] In another preferred embodiment, the inertial sand removal structure is arranged in a V-shaped structure, and a relatively sharp end of the inertial sand removal structure is arranged close to the converging guide plate, and a relatively open end of the inertial sand removal structure is arranged close to the air inlet.

[0010] In another preferred embodiment, the inertial sand removal structure includes: a first array portion and a second array portion, one end of the first array portion and one end of the second array portion are relatively close to each other, the other end of the first array portion and the other end of the second array portion are relatively close to each other, and the first array portion and the second array portion are jointly arranged in a V-shape, the first array portion and the second array portion each include a plurality of sand removal baffles, the plurality of sand removal baffles are arranged in sequence, and a sand removal channel is formed between each two adjacent sand removal baffles.

[0011] In another preferred embodiment, each of the sand removal baffles is provided with a bending piece assembly, and the bending piece assembly is used to collide with sand and dust.

[0012] In another preferred embodiment, the sand removal baffle is arranged in a bent shape, and has at least one bent portion formed thereon, and the bent sheet assembly is arranged at the bent portion.

[0013] In another preferred embodiment, the bending sheet assembly includes at least one baffle, one end of the baffle is connected to the bending portion of one of the sand removal baffles, the other end of the baffle is arranged toward the input end of the sand removal channel, and the other end of the baffle is close to the other of the sand removal baffles and forms an acceleration channel portion, and the one sand removal baffle and the other sand removal baffle are arranged adjacent to each other.

[0014] In another preferred embodiment, a sand outlet hole is provided on the mounting portion, and the sand outlet hole is connected to the input end of the sand and dust recovery module.

[0015] In another preferred embodiment, the sand and dust recovery module includes: a sand and dust collection box, and the upper end of the sand and dust collection box is connected to the sand and dust removal module.

[0016] In another preferred embodiment, the sand and dust recovery module also includes: a sand removal fan, a sand removal pipe, a cyclone dust collector and a return air duct, the input end of the sand removal fan is connected to one end of the sand removal pipe, the other end of the sand removal pipe is connected to the cyclone dust collector, the cyclone dust collector is connected to one end of the return air duct, the other end of the return air duct extends into the main body, and the other end of the return air duct is arranged between the air inlet and the sand and dust removal module.

[0017] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, sand is removed through the sand and dust removal module by utilizing the inertial sand removal method, and the sand and dust accumulated at the bottom of the sand removal module is discharged and recovered through the sand and dust recovery module, thereby avoiding sand and dust from clogging the air duct and avoiding the occurrence of secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall schematic diagram of a high-efficiency sand removal device of the present invention;

[0019] Figure 2 This is a schematic diagram of an air inlet of a high-efficiency sand removal device of the present invention;

[0020] Figure 3 This is an internal top view of a high-efficiency sand removal device of the present invention;

[0021] Figure 4 This is a first schematic diagram of a sand and dust removal module of a high-efficiency sand removal device of the present invention;

[0022] Figure 5 This is a second schematic diagram of a sand and dust removal module of a high-efficiency sand removal device of the present invention;

[0023] Figure 6 This is a schematic diagram of a sand outlet hole of a high-efficiency sand removal device of the present invention;

[0024] Figure 7 This is a first schematic diagram of a sand removal baffle of a high-efficiency sand removal device of the present invention;

[0025] Figure 8 A second schematic diagram of a sand removal baffle of a high-efficiency sand removal device according to the present invention;

[0026] Figure 9 This is a schematic diagram of wind and sand separation of a high-efficiency sand removal device of the present invention.

[0027] In the attached figure:

[0028] 1. Main body; 11. Air inlet; 12. Air outlet; 13. Air duct; 2. Sand and dust removal module; 3. Fan module; 4. Sand and dust recovery module; 21. Inertial sand removal structure; 22. Converging guide plate; 23. Mounting part; 24. First air outlet; 211. First array part; 212. Second array part; 213. Sand removal baffle; 214. Sand removal channel; 215. Bending sheet assembly; 216. Bending part; 217. Baffle; 218. Acceleration channel part; 25. Sand outlet; 41. Sand and dust collection box; 42. Sand discharge fan; 43. Sand discharge pipe; 44. Cyclone dust collector; 45. Return air duct; 5. Partition; 6. Converging space; 7. Second air outlet; 31. Fan base; 32. Fan body; 33. Connecting pipe; 8. Air duct guide plate; 9. Bracket. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] like Figures 1 to 5As shown, a high-efficiency sand removal device of a preferred embodiment is shown, comprising: a main body 1, an air inlet 11 is provided at one end of the main body 1, an air outlet 12 is provided at the other end of the main body 1, and an air duct 13 is formed in the main body 1; at least one sand and dust removal module 2, the sand and dust removal module 2 is arranged in the air duct 13, and the sand and dust removal module 2 is used to separate the air flow and sand and dust; a fan module 3, the fan module 3 is arranged in the air duct 13, and the fan module 3 is arranged between the air outlet 12 and the sand and dust removal module 2; a dust recovery module 4, the dust recovery module 4 is arranged at the lower end of the main body 1, and the dust recovery module 4 is connected to the bottom of the sand and dust removal module 2, and the dust recovery module 4 is used to recover the sand and dust separated by the sand and dust removal module 2. Furthermore, the high-efficiency sand removal device is installed in a corresponding place where sand removal and ventilation are required, and then the air inlet 11 is facing the position where the wind carrying sand and dust enters. When the wind carrying sand and dust enters the air duct 13 of the main body 1 through the air inlet 11, and under the suction force of the fan module 3, the wind carrying sand and dust enters the sand and dust removal module 2 and is filtered. The sand and dust are affected by inertia in the sand and dust removal module 2 and collide with the inside of the sand and dust removal module 2 and fall into the sand recovery module 4 for collection and recovery. The filtered wind is extracted by the fan module 3 and finally discharged from the air outlet 12.

[0031] Furthermore, as a preferred embodiment, the sand and dust removal module 2 includes: an inertial sand removal structure 21, a converging guide plate 22 and a mounting portion 23. The mounting portion 23 is arranged in the air duct 13, the inertial sand removal structure 21 is arranged on the mounting portion 23, the converging guide plate 22 is arranged at the output end of the inertial sand removal structure 21, the input end of the inertial sand removal structure 21 is arranged close to the air inlet 11, and a first air outlet 24 is opened on the converging guide plate 22. Furthermore, the mounting portion 23 is used to mount the inertial sand removal structure 21, and the converging guide plate 22 is arranged opposite to the inertial sand removal structure 21. A groove portion is formed on the converging guide plate 22 and is arranged toward the output end of the inertial sand removal structure 21, that is, the wind entering from the air inlet 11 first advances along the air duct 13 and hits the converging guide plate 22, and the sand and dust contained in the wind are separated for the first time on the converging guide plate 22 under the action of inertia, and the sand and dust collide with and fall into the groove portion. The wind that completes the above-mentioned first separation enters the inertial sand removal structure 21 under the suction force of the fan module 3 for the next step of separation. The wind that completes the above-mentioned next step of separation in the inertial sand removal structure 21 moves toward the converging guide plate 22 again and continues to flow from the first air outlet 24 to the side of the converging guide plate 22 close to the air outlet 12.

[0032] In a further embodiment of the present invention, the location of the groove portion on the converging guide plate 22 is staggered with the location of the first air outlet 24 on the converging guide plate 22 .

[0033] In a further embodiment of the present invention, the aforementioned groove portion may be formed by two opposing baffles, with the groove portion formed between the two baffles, both of which are mounted on the converging guide plate 22. Furthermore, the two baffles are respectively disposed on the outer side of one end of the first array portion 211 and the outer side of one end of the second array portion 212. The two baffles may preferably be connected to the outer side of one end of the first array portion 211 and the outer side of one end of the second array portion 212, respectively.

[0034] In a further embodiment of the present invention, the mounting portion 23 includes: an upper end plate, a lower end plate, a left end plate, and a right end plate. The upper end plate, the right end plate, the lower end plate, and the left end plate are connected in sequence to form a rectangular frame structure. The upper end plate is arranged directly above the lower end plate. The mounting portion 23 can be directly installed on the upper surface of the lower end plate. The converging guide plate 22 can be arranged in a rectangular shape and the four sides of the converging guide plate 22 are respectively connected to the upper end plate, the lower end plate, the left end plate, and the right end plate to relatively close one end of the above-mentioned rectangular frame structure. The above-mentioned inertial sand removal structure 21 is arranged on the inner side of the rectangular frame structure.

[0035] Furthermore, as a preferred embodiment, the inertial sand removal structure 21 is arranged in a V-shaped structure, with a relatively sharp end of the inertial sand removal structure 21 positioned near the converging guide plate 22, and a relatively open end of the inertial sand removal structure 21 positioned near the air inlet 11. Furthermore, the relatively sharp end is the end where the first array portion 211 and the second array portion 212 are relatively close, and the relatively open end is the end where the first array portion 211 and the second array portion 212 are relatively far apart.

[0036] Furthermore, as a preferred embodiment, the inertial sand removal structure 21 includes: a first array portion 211 and a second array portion 212, one end of the first array portion 211 and one end of the second array portion 212 are relatively close to each other, the other end of the first array portion 211 and the other end of the second array portion 212 are relatively close to each other, and the first array portion 211 and the second array portion 212 are jointly arranged in a V-shape, the first array portion 211 and the second array portion 212 both include a plurality of sand removal baffles 213, the plurality of sand removal baffles 213 are arranged in sequence, and a sand removal channel 214 is formed between each two adjacent sand removal baffles 213.

[0037] Furthermore, as a preferred embodiment, the inertial sand removal structure 21 includes an air duct guide plate 8 disposed between the first array portion 211 and the second array portion 212. The air duct guide plate 8 extends along the length of the air duct 13. A certain gap is formed between the end of the air duct guide plate 8 near the air outlet 12 and the converging guide plate 22, and a certain distance is also provided between one end of the first array portion 211 and one end of the second array portion 212. Furthermore, the provision of the air duct guide plate 8 allows the dust-laden wind entering through the air inlet 11 to enter the inertial sand removal structure 21 from the relatively open end thereof under the guidance of the air duct guide plate 8, move along the air duct guide plate 8, and impact with the converging guide plate 22 to perform the aforementioned primary separation.

[0038] Furthermore, as a preferred embodiment, each sand removal baffle 213 is provided with a bent piece assembly 215, which is used to collide with sand and dust. Furthermore, the wind that has completed the first separation still contains a certain amount of sand and dust. The wind that has completed the first separation enters the inertial sand removal structure 21 from the inside to the outside. That is, the wind that has completed the first separation enters the sand removal channel 214 near the wind duct guide plate 8 with the cooperation of the fan module 3, and each bent piece assembly 215 is disposed in the sand removal channel 214.

[0039] Furthermore, as a preferred embodiment, the sand removal baffle 213 is arranged in a bent shape, and there is at least one bent portion 216 formed on the sand removal baffle 213, and the bent piece assembly 215 is arranged at the bent portion 216. Figure 7 and Figure 8 As shown, two embodiments of the bending sheet assembly 215 with two different baffle plate 217 configurations are provided, and the sand removal baffles 213 installed in the two bending sheet assemblies 215 are both configured in an S-shaped bending shape, with two bending portions 216 formed in each corresponding sand removal channel 214.

[0040] Furthermore, as a preferred embodiment, the bending plate assembly 215 includes at least one baffle 217, one end of the baffle 217 is connected to the bending portion 216 of a sand removal baffle 213, and the other end of the baffle 217 is arranged toward the input end of the sand removal channel 214, and the other end of the baffle 217 is close to the other sand removal baffle 213 and forms an acceleration channel portion 218, and the sand removal baffle 213 is adjacent to the other sand removal baffle 213. Furthermore, the other end of the baffle 217 faces in the opposite direction to the flow direction of the wind entering the sand removal channel 214, and a sand blocking portion is formed between the surface of the baffle 217 and a sand removal baffle 213 corresponding to the baffle 217. After the wind enters the sand removal channel 214, it collides with the corresponding sand blocking portion so that the sand and dust are separated again. The wind that has completed the separation continues to enter the acceleration channel portion 218 to be accelerated and moves towards the sand removal channel 214 away from the wind duct guide plate 8 until it leaves the above-mentioned sand removal channel 214.

[0041] Further, as a preferred embodiment, for Figure 7 For the first embodiment of the bending sheet assembly 215 provided, based on Figure 7 In the paper direction, the sand removal channel 214 is set from top to bottom, combined with Figure 9 As shown, the wind flow direction is also set from top to bottom. The sand removal baffle 213 includes: a first connecting section, a second connecting section, a third connecting section and a fourth connecting section. A first bending portion 216 is formed between the first connecting section and the second connecting section, a second bending portion 216 is formed between the second connecting section and the third connecting section, and a third bending portion 216 is formed between the third connecting section and the fourth connecting section. The first bending portion 216 is relatively arched to the left, and the second bending portion 216 is relatively arched to the right. The third curved portion 216 is relatively arched to the left. A first baffle 217 is provided on the first curved portion 216. One end of the first baffle 217 is connected to the first curved portion 216, and the other end of the first baffle 217 is tilted toward the upper right. One end of the second baffle 217 is connected to the second curved portion 216, and the other end of the second baffle 217 is tilted toward the upper left. The third baffle 217 is connected to the third curved portion 216, and the other end of the third baffle 217 is tilted toward the upper right. Furthermore, after passing through the corresponding sand removal channel 214, the wind sequentially passes through the first curved portion 216, the second curved portion 216, and the third curved portion 216, and then undergoes three sand and dust separations.

[0042] Further, as a preferred embodiment, Figure 7 As shown, specifically, the second array portion 212 is arranged. Correspondingly, the bending piece assembly 215 in the first array portion 211 is arranged axially symmetrically with respect to the air duct guide plate 8 and the second array portion 212 .

[0043] Further, as a preferred embodiment, one end of the first baffle 217 is connected to the arched side of the first bending portion 216, one end of the second baffle 217 is connected to the arched side of the second bending portion 216, and one end of the third baffle 217 is connected to the arched side of the third bending portion 216.

[0044] Furthermore, as a preferred embodiment, the first baffle 217 and the third baffle 217 are disposed in the same sand removal channel 214 , and the second baffle 217 is disposed in another sand removal channel 214 adjacent to the right side of the sand removal channel 214 .

[0045] Furthermore, as a preferred embodiment, the setting direction of the other end of the first baffle 217 , the setting direction of the other end of the second baffle 217 , and the setting direction of the other end of the third baffle 217 are all parallel to the axis of the corresponding sand removal channel 214 .

[0046] Further, as a preferred embodiment, for Figure 8 The second embodiment of the bending piece assembly 215 is provided. Figure 7 In the first embodiment of the provided bending assembly, a fourth baffle 217 is provided in the middle of the second connecting section, and a fifth baffle 217 and a sixth baffle 217 are provided on both sides of the third section, respectively. The fourth baffle 217 is oriented in the same direction as the first baffle 217, and the fifth baffle 217 is oriented in the same direction as the second baffle 217. The fifth baffle 217 extends in a direction away from the fifth baffle 217.

[0047] Further, as a preferred embodiment, Figure 6 As shown, a sand outlet hole 25 is opened on the mounting portion 23, and the sand outlet hole 25 is connected to the input end of the sand and dust recovery module 4. Furthermore, the number of sand outlet holes 25 is determined by the number of sand blocking portions, that is, a sand outlet hole 25 can be opened on the lower end plate of the mounting portion 23 directly below each sand blocking portion.

[0048] Furthermore, as a preferred embodiment, the sand and dust recovery module 4 includes: a sand and dust collection box 41 , and the upper end of the sand and dust collection box 41 is connected to the sand and dust removal module 2 .

[0049] Furthermore, as a preferred embodiment, the lower surface of the main body 1 is opened so that the sand and dust flowing out of the sand outlet 25 directly fall into the sand and dust collection box 41 .

[0050] Furthermore, as a preferred embodiment, the inner contour of the dust collection box 41 can be set to a funnel-shaped structure.

[0051] Furthermore, as a preferred embodiment, at least one inclined surface is provided on the inner wall of the dust collection box 41, and the above-mentioned plurality of sand outlet holes 25 are provided directly above the inclined surface, and the length extension direction of the inclined surface projected on the horizontal plane is the same as the length extension direction of the inertial sand removal structure 21.

[0052] Furthermore, as a preferred embodiment, the sand and dust recovery module 4 further includes: a sand discharge fan 42, a sand discharge pipe 43, a cyclone dust collector 44, and a return air duct 45. The input end of the sand discharge fan 42 is connected to one end of the sand discharge pipe 43, the other end of the sand discharge pipe 43 is connected to the cyclone dust collector 44, the cyclone dust collector 44 is connected to one end of the return air duct 45, the other end of the return air duct 45 extends into the main body 1, and the other end of the return air duct 45 is arranged between the air inlet 11 and the sand and dust removal module 2. Furthermore, under the action of the sand discharge fan 42, the sand and dust falling into the sand collection box 41 quickly enters the sand discharge pipe 43, and then enters the cyclone dust collector 44 through the sand discharge pipe 43. Under the action of the cyclone dust collector 44, the remaining wind and sand are separated. The separated air enters the main body 1 near the input end of the sand and dust removal module 2 through the return air duct 45, and the separated sand falls and is discharged under the action of inertia.

[0053] Furthermore, as a preferred embodiment, the dust recovery module 4 also includes: a shut-off valve, the dust output end of the cyclone dust collector 44 is set downward, and the shut-off valve is installed at the dust output end of the cyclone dust collector 44 to control the discharge of dust.

[0054] Furthermore, as a preferred embodiment, the sand and dust recovery module 4 further includes: a recovery barrel, which is operably placed below the cyclone dust collector 44, and a sand and dust inlet for receiving sand and dust is provided at the upper end of the recovery barrel.

[0055] Furthermore, as a preferred embodiment, a telescopic tube may be provided at the upper end of the recovery barrel, one end of the telescopic tube is connected to the sand and dust inlet, and the other end of the telescopic tube is operably sleeved on the above-mentioned sand and dust output end.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the implementation and protection scope of the present invention.

[0057] The present invention also has the following implementation modes based on the above:

[0058] In a further embodiment of the present invention, the main body 1 is configured as a shell-like structure, and a partition 5 is disposed within the main body 1. The partition 5 is disposed near the input end of the fan module 3, and the output end of the fan module 3 is disposed near the air outlet 12. A collection space 6 is formed between the partition 5 and the dust removal module 2. Furthermore, air filtered by the dust removal module 2 enters the collection space 6, where it is collected and moved toward the air outlet 12 under the action of the fan module 3.

[0059] In a further embodiment of the present invention, the main body 1 is configured in a rectangular structure.

[0060] In a further embodiment of the present invention, a second air outlet 7 is provided on the partition 5 , and the second air outlet 7 is connected to the input end of the fan module 3 .

[0061] In a further embodiment of the present invention, the fan module 3 includes: a fan base 31, a fan body 32 and a connecting pipe 33. The fan base 31 is fixedly installed at the bottom of the air duct 13. The fan body 32 is installed at the upper end of the fan base 31. The input end of the fan body 32 is connected to one end of the connecting pipe 33, and the other end of the connecting pipe 33 is connected to the second air outlet 7.

[0062] In a further embodiment of the present invention, the air outlet 12 is provided on the upper surface of the main body 1 .

[0063] In a further embodiment of the present invention, the air inlet 11 is oriented in a horizontal direction.

[0064] In a further embodiment of the present invention, a control module is installed on the main body 1 , and the control module is used to control the operation of the fan module 3 and the dust recovery module 4 .

[0065] In a further embodiment of the present invention, the present invention further comprises a bracket 9 , which is mounted on the lower surface of the main body 1 . The bracket 9 places the main body 1 at a suitable height to facilitate operation of the recycling bin.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency sand removal device, characterized in that: include: A main body, one end of the main body is provided with an air inlet, the other end of the main body is provided with an air outlet, and an air duct is formed in the main body; At least one sand and dust removal module, the sand and dust removal module is arranged in the air duct, the sand and dust removal module is used to separate the airflow and the sand and dust, the sand and dust removal module includes: an inertial sand removal structure, a converging guide plate and a mounting portion, the mounting portion is arranged in the air duct, the inertial sand removal structure is arranged on the mounting portion, the converging guide plate is arranged at the output end of the inertial sand removal structure, the input end of the inertial sand removal structure is arranged near the air inlet, a first air outlet is opened on the converging guide plate, a groove portion is formed on the converging guide plate and is arranged towards the output end of the inertial sand removal structure, and the arrangement position of the groove portion on the converging guide plate is staggered with the arrangement position of the first air outlet on the converging guide plate; The inertial sand removal structure includes a first array portion and a second array portion, the first array portion and the second array portion are arranged in a V-shaped structure, a relatively sharp end of the inertial sand removal structure is arranged near the converging guide plate, and a relatively open end of the inertial sand removal structure is arranged near the air inlet, an air duct guide plate is arranged between the first array portion and the second array portion, and the air duct guide plate extends along the length direction of the air duct, a certain gap is formed between the end of the air duct guide plate near the air outlet and the converging guide plate, and a certain distance is formed between one end of the first array portion and one end of the second array portion; A fan module, the fan module is arranged in the air duct, and the fan module is arranged between the air outlet and the sand and dust removal module; a dust recovery module, the dust recovery module being disposed at the lower end of the main body, the dust recovery module being in communication with the bottom of the dust removal module, and being used to recover the dust separated by the dust removal module; The dust recovery module includes a dust collection box, a sand discharge fan, a sand discharge pipe, a cyclone dust collector and a return air duct. The upper end of the dust collection box is connected to the sand removal module, the input end of the sand discharge fan is connected to one end of the sand discharge pipe, the other end of the sand discharge pipe is connected to the cyclone dust collector, the cyclone dust collector is connected to one end of the return air duct, the other end of the return air duct extends into the main body, and the other end of the return air duct is arranged between the air inlet and the sand and dust removal module.

2. The high-efficiency sand removal device according to claim 1, characterized in that: One end of the first array portion and one end of the second array portion are arranged relatively close to each other, the other end of the first array portion and the other end of the second array portion are arranged relatively close to each other, and the first array portion and the second array portion are arranged in a V shape together. The first array portion and the second array portion each include a plurality of sand removal baffles, and the plurality of sand removal baffles are arranged in sequence, and a sand removal channel is formed between each two adjacent sand removal baffles.

3. The high-efficiency sand removal device according to claim 2, characterized in that: Each of the sand removal baffles is provided with a bending piece assembly, and the bending piece assembly is used for colliding with sand and dust.

4. The high-efficiency sand removal device according to claim 3, characterized in that: The sand removal baffle is arranged in a bent shape, and has at least one bent portion formed thereon, and the bent sheet assembly is arranged at the bent portion.

5. The high-efficiency sand removal device according to claim 4, characterized in that: The bending sheet assembly includes at least one baffle, one end of the baffle is connected to the bending portion of one of the sand removal baffles, the other end of the baffle is arranged toward the input end of the sand removal channel, and the other end of the baffle is close to the other of the sand removal baffles to form an acceleration channel portion, and the one sand removal baffle is adjacent to the other sand removal baffle.

6. The high-efficiency sand removal device according to claim 1, characterized in that: A sand outlet hole is provided on the mounting portion, and the sand outlet hole is connected to the input end of the sand and dust recovery module.

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