Fly ash screening device

Abstract

The utility model relates to the field of coal ash, in particular to a coal ash screening device. The technical problem to be solved by the utility model is that coarse particles in fly ash are not crushed and reutilized by screening equipment; fine particles in fly ash are easy to adhere to the inner wall, so that the screening and discharging effect becomes poor, the difficulty and cost of cleaning work are increased, and normal operation of a screening device is influenced. Comprising a shell, a conveying mechanism is arranged on the lower side of the shell, a dust removal mechanism is arranged on the side face of the shell, a smashing mechanism is arranged on the inner side of the shell, a screening mechanism is arranged on one side of the smashing mechanism, and an oscillating mechanism is arranged on the lower side of the screening mechanism; an ash falling pipeline is fixedly connected between the side face of the shell and the feeding groove, and the oscillating mechanism comprises a motor frame. By arranging the screening mechanism and the smashing mechanism, the screening mechanism and the smashing mechanism share one power, and when the screening mechanism is started, the smashing mechanism is started synchronously.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fly ash especially relates to a fly ash screening device. BACKGROUND

[0002] The main sources of fly ash include coal-fired facilities such as thermal power plants, industrial furnaces and large boilers. Metal smelting, non-metallic mines, chemical industry, building materials and other industries need to burn coal or other solid fuels to heat furnace bodies, reaction kettles and rolling mills and other equipment. The fly ash produced in these processes is called industrial ash. Compared with the fly ash of thermal power plants, the industrial furnace ash has very high diversity and more complex composition types.

[0003] In industrial production and life, the amount of fly ash produced is large, which is harmful to the environment and poses a threat to public health. Therefore, it is of great significance to strengthen the research and application of fly ash treatment and utilization technology. In the prior art, the coarse and fine particles in fly ash need to be separated by a screening device to obtain fly ash with uniform particle size distribution. The screening device does not crush the coarse particles in fly ash for reuse. The fine particles in fly ash are prone to adhere to the inner wall, resulting in poor screening discharge effect, increasing the difficulty and cost of cleaning work, and affecting the normal operation of the screening device. SUMMARY

[0004] (1) Technical problem to be solved

[0005] The utility model discloses in order to overcome not to the coarse particle in fly ash carries out the utilization of crushing again, the fine particle in fly ash is prone to adhere to the inner wall, resulting in the screening discharge effect to be poor, increased the difficulty and cost of cleaning work, also affected the normal operation of screening device's shortcoming, the utility model discloses the technical problem to be solved is to provide a fly ash screening device.

[0006] (2) Technical scheme

[0007] In order to solve the above technical problems, the utility model provides a fly ash screening device, including the shell, the downside of shell is provided with conveying mechanism, the side of shell is provided with dust removal mechanism, the inside of shell is provided with rubbing mechanism, one side of rubbing mechanism is provided with screening mechanism, the downside of screening mechanism is provided with oscillation mechanism, the side of shell upper end is fixedly connected with the feed slot, the side of shell and the feed slot are fixedly connected with the ash falling pipeline, the oscillation mechanism includes motor frame, the outside of shell is fixedly connected with motor frame, the upper surface of motor frame is fixedly connected with oscillation motor, the output of oscillation motor is fixedly connected with main bevel gear, the side of main bevel gear is provided with auxiliary bevel gear, main bevel gear is connected with auxiliary bevel gear, the side of auxiliary bevel gear is fixedly connected with transmission shaft, the outside of transmission shaft is fixedly connected with two cams, the outside of transmission shaft is also rotatably connected with two transmission frames, the other end of transmission frame is fixedly connected with ash falling pipeline.

[0008] Preferably, the oscillation mechanism further includes a connecting plate, the connecting plate is fixedly connected with the inner side of the ash falling pipeline, the other end of the connecting plate is rotatably connected with an oscillation plate through a rotating shaft, the other end of the oscillation plate is fixedly connected with two tension springs between the inner side of the ash falling pipeline, the other end of the oscillation plate is slidably connected with a guide bar, the guide bar is fixedly connected with the inner side of the ash falling pipeline, the side of the other end of the oscillation plate is fixedly connected with two trigger columns, the trigger columns are slidably connected with the ash falling pipeline.

[0009] Preferably, the rubbing mechanism includes a rubbing motor, the rubbing motor is fixedly connected with the shell, the output of the rubbing motor is fixedly connected with a main pulley, the inside of the shell is rotatably connected with a main rubbing roller, the arc-shaped outer side of the main rubbing roller is fixedly connected with a plurality of teeth, the end of the main rubbing roller penetrating through the shell and extending to the outside of the shell is fixedly connected with a secondary pulley, the outer side of the main pulley and the secondary pulley is sleeved with a power belt, the inside of the shell is also rotatably connected with a secondary rubbing roller, the arc-shaped outer side of the secondary rubbing roller is fixedly connected with a plurality of teeth, the main rubbing roller and the secondary rubbing roller are connected through the teeth, the two ends of the secondary rubbing roller penetrating through the shell and extending to the outside of the shell are fixedly connected with synchronous wheels.

[0010] Preferably, the screening mechanism comprises a screening pulley, a eccentric wheel is fixedly connected to the side of the screening pulley through a rotating shaft, a screening arm is rotatably connected to the outside of the rotating shaft, a screening shaft is rotatably connected to the other end of the screening arm, an oval-shaped sliding groove is formed in the two sides of the feeding groove, the screening shaft is slidably connected in the oval-shaped sliding groove, a sieve plate is fixedly connected to the other end of the screening shaft, two return blocks are fixedly connected to the two sides of the sieve plate, two square-shaped sliding grooves are formed in the two sides of the feeding groove, the return blocks are slidably connected in the square-shaped sliding grooves, four positioning blocks are fixedly connected to the two sides of the feeding groove, and return springs are fixedly connected between the opposite sides of the return blocks and the positioning blocks.

[0011] Preferably, the dust removal mechanism comprises a water tank, the water tank is fixedly connected to the outside of the shell, a water suction pipe is fixedly connected to the upper surface of the water tank, a water pump is communicated with the other end of the water suction pipe, the water pump is fixedly connected to the outside of the shell, a water delivery pipe is fixedly connected to the water outlet of the water pump, and a spraying pipe is fixedly connected to the other end of the water delivery pipe.

[0012] Preferably, the conveying mechanism comprises a conveying frame, conveying rollers are rotatably connected to the two ends of the conveying frame, a conveying belt is sleeved on the outside of the two conveying rollers, a conveying motor is fixedly connected to the side of the conveying frame, a first pulley is fixedly connected to the output end of the conveying motor, a second pulley is fixedly connected to the end of the conveying frame penetrating through the conveying frame, and a transmission belt is sleeved on the outside of the first pulley and the second pulley.

[0013] (3) Beneficial effects

[0014] 1. By arranging the screening mechanism and the crushing mechanism, the screening mechanism and the crushing mechanism share one power, the crushing mechanism is started synchronously when the screening mechanism is started, the screening mechanism separates the coarse and fine particles of the untreated fly ash, the fine particle fly ash falls into the conveying mechanism below the device through the ash falling pipeline, the screening mechanism conveys the coarse particle fly ash to the crushing mechanism, the fly ash is separated into coarse and fine particles, the coarse particle fly ash is crushed, the utilization rate of fly ash is increased, the production cost is reduced, and the recycling of resources and environmental protection are promoted.

[0015] 2、By setting the oscillation mechanism, the output end of the oscillation motor drives the main bevel gear to rotate, the main bevel gear drives the auxiliary bevel gear to rotate, the auxiliary bevel gear drives the cam to rotate, the cam pushes the trigger column to slide to the inside of the ash falling pipeline, the trigger column pushes the oscillating plate to rotate a certain angle with the rotating shaft at the end as the center to the inside, the oscillating plate constantly rotates to shake off the fine fly ash attached to the oscillating plate, prevents the ash falling pipeline from being blocked, causes the screening discharge effect to be poor, and guarantees the stable operation of the screening device;

[0016] 3、By setting the dust removal mechanism, the water pump draws water from the water tank through the water suction pipe, and the water outlet of the water pump pushes the water to the spraying pipe through the water conveying pipe, and the water is sprayed from the side of the spraying pipe. Spray hole, dust removal treatment is carried out on the fly ash, dust removal treatment is a very important link in environmental protection and industrial production, which aims to reduce the suspended dust particles in the air, improve air quality, and protect the health of workers and the environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic view of the utility model;

[0018] Figure 2 It is the crushing mechanism structure schematic view of the utility model;

[0019] Figure 3 It is the screening mechanism structure schematic view of the utility model;

[0020] Figure 4 It is the oscillation mechanism structure schematic view of the utility model;

[0021] Figure 5 It is the ash falling pipeline section view of the utility model;

[0022] Figure 6 It is the conveying mechanism structure schematic view of the utility model;

[0023] Figure 7 It is the dust removal mechanism structure schematic view of the utility model.

[0024] The marks in the drawings are: 1-support, 2-conveying mechanism, 201-conveying frame, 202-conveying motor, 203-first pulley, 204-transmission belt, 205-second pulley, 206-conveying roller, 207-conveying belt, 3-dust removal mechanism, 301-water tank, 302-water pump, 303-water suction pipe, 304-water delivery pipe, 305-spraying pipe, 4-oscillation mechanism, 401-motor frame, 402-oscillation motor, 403-main bevel gear, 404-secondary bevel gear, 405-cam, 406-transmission frame, 407-transmission shaft, 408-trigger column, 409-connection plate, 410-oscillation plate, 411-tension spring, 412-guide strip, 5-pulverizing mechanism, 501-pulverizing motor, 502-main pulley, 503-power belt, 504-secondary pulley, 505-main pulverizing roller, 506-secondary pulverizing roller, 507-synchronous wheel, 6-screening mechanism, 601-synchronous belt, 602-screening pulley, 603-eccentric wheel, 604-screening arm, 605-screening shaft, 606-return block, 607-return spring, 608-positioning block, 609-screening plate, 7-outer shell, 8-ash falling pipeline, 9-feeding slot. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings and examples.

[0026] Example 1

[0027] A fly ash screening device, such as Figure 1 、 Figure 4 、 Figure 5As shown, including the shell 7, the lower side of the shell 7 is provided with conveying mechanism 2, by setting conveying mechanism 2, the treated fly ash is conveyed to the designated location, the side of the shell 7 is provided with dust removal mechanism 3, by setting dust removal mechanism 3, the dust of fly ash is handled, aiming at reducing the dust particles suspended in the air, improving air quality, protecting the health of workers and environment, the inner side of the shell 7 is provided with crushing mechanism 5, by setting crushing mechanism 5, the coarse particles in fly ash are crushed, the utilization rate of fly ash is improved, one side of crushing mechanism 5 is provided with screening mechanism 6, by setting screening mechanism 6, the coarse and fine particles in fly ash are separated, and the fly ash of coarse particles is conveyed to crushing mechanism 5, the lower side of screening mechanism 6 is provided with oscillation mechanism 4, by setting oscillation mechanism 4, the fine particles of fly ash adhered to the inner wall of ash falling pipeline 8 are shaken off, preventing the ash falling pipeline 8 from being blocked, resulting in poor screening discharge effect, the side of the upper end of the shell 7 is fixedly connected with feeding slot 9, the side of the shell 7 and the feeding slot 9 are fixedly connected with ash falling pipeline 8, oscillation mechanism 4 includes motor bracket 401, motor bracket 401 is fixedly connected with the outer side of shell 7, the upper surface of motor bracket 401 is fixedly connected with oscillation motor 402, the output end of oscillation motor 402 is fixedly connected with main bevel gear 403, the side of main bevel gear 403 is provided with auxiliary bevel gear 404, main bevel gear 403 is engagedly connected with auxiliary bevel gear 404, the side of auxiliary bevel gear 404 is fixedly connected with transmission shaft 407, the outer side of transmission shaft 407 is fixedly connected with two cams 405, the outer side of transmission shaft 407 is also rotatably connected with two transmission frames 406, the other end of transmission frame 406 is fixedly connected with ash falling pipeline 8, the inner side of ash falling pipeline 8 is fixedly connected with connecting plate 409, the other end of connecting plate 409 is rotatably connected with oscillation plate 410 through rotating shaft, the other end of oscillation plate 410 is fixedly connected with two tension springs 411 between the inner side of ash falling pipeline 8, the other end of oscillation plate 410 is slidably connected with guide strip 412, guide strip 412 is fixedly connected with the inner side of ash falling pipeline 8, the side of the other end of oscillation plate 410 is fixedly connected with two trigger columns 408, trigger column 408 is slidably connected with ash falling pipeline 8.

[0028] As Figure 2As shown, the crushing mechanism 5 includes a crushing motor 501, the crushing motor 501 is fixedly connected with the shell 7, the output end of the crushing motor 501 is fixedly connected with a main pulley 502, the inside of the shell 7 is rotatably connected with a main crushing roller 505, the arc-shaped outside of the main crushing roller 505 is fixedly connected with a plurality of teeth, the end of the main crushing roller 505 which penetrates through the shell 7 and extends to the outside of the shell 7 is fixedly connected with a secondary pulley 504, the outside of the main pulley 502 and the secondary pulley 504 is sleeved with a power belt 503, the inside of the shell 7 is also rotatably connected with a secondary crushing roller 506, the arc-shaped outside of the secondary crushing roller 506 is fixedly connected with a plurality of teeth, the main crushing roller 505 and the secondary crushing roller 506 are connected through the tooth engagement, and the two ends of the secondary crushing roller 506 which penetrates through the shell 7 and extends to the outside of the shell 7 are fixedly connected with a synchronous wheel 507.

[0029] As shown in the figure, Figure 3 The screening mechanism 6 is symmetrically arranged on both sides of the feeding tank 9, the screening mechanism 6 includes a screening pulley 602, the screening pulley 602 is sleeved with a synchronous belt 601 outside the synchronous wheel 507, the side of the screening pulley 602 is fixedly connected with an eccentric wheel 603 through a rotating shaft, the outside of the rotating shaft is rotatably connected with a screening arm 604, the other end of the screening arm 604 is rotatably connected with a screening shaft 605, the two sides of the feeding tank 9 are provided with an oval-shaped sliding groove, the screening shaft 605 is slidably connected in the oval-shaped sliding groove, the other end of the screening shaft 605 is fixedly connected with a screen plate 609, the two sides of the screen plate 609 are fixedly connected with two reset blocks 606, two square-shaped sliding grooves are also arranged on the two sides of the feeding tank 9, the reset blocks 606 are slidably connected in the square-shaped sliding grooves, the two sides of the feeding tank 9 are fixedly connected with four positioning blocks 608, and the opposite sides of the reset blocks 606 and the positioning blocks 608 are fixedly connected with reset springs 607.

[0030] As shown in the figure, Figure 7 The dust removal mechanism 3 includes a water tank 301, the water tank 301 is fixedly connected with the outside of the shell 7, the upper surface of the water tank 301 is fixedly connected with a water suction pipe 303, the other end of the water suction pipe 303 is communicated with a water pump 302, the water pump 302 is fixedly connected with the outside of the shell 7, the water outlet of the water pump 302 is fixedly connected with a water delivery pipe 304, the other end of the water delivery pipe 304 is fixedly connected with a spray pipe 305, and a plurality of spray holes are arranged on the side of the spray pipe 305.

[0031] As shown in the figure, Figure 6As shown, the conveying mechanism 2 comprises a conveying frame 201, both ends of the conveying frame 201 are rotatably connected with conveying rollers 206, the outer sides of the two conveying rollers 206 are sleeved with a conveying belt 207, the side surface of the conveying frame 201 is fixedly connected with a conveying motor 202, the output end of the conveying motor 202 is fixedly connected with a first belt pulley 203, one of the conveying rollers 206 penetrates through the end of the conveying frame 201 and is fixedly connected with a second belt pulley 205, the first belt pulley 203 and the second belt pulley 205 are sleeved with a transmission belt 204.

[0032] Embodiment 2

[0033] Working principle: when the device is used, the untreated fly ash enters from the feeding groove 9, the screening mechanism 6 and the crushing mechanism 5 share one power, when the screening mechanism 6 is started, the crushing mechanism 5 is started synchronously, the screening mechanism 6 separates the coarse and fine particles of the untreated fly ash, the fine particle fly ash falls into the conveying mechanism 2 below the device through the ash falling pipeline 8, the oscillation mechanism 4 shakes off the fine particle fly ash adhered to the inner wall of the ash falling pipeline 8, the screening mechanism 6 conveys the coarse particle fly ash to the crushing mechanism 5, the crushing mechanism 5 crushes the coarse particle fly ash and falls into the conveying mechanism 2 below, the conveying mechanism 2 pushes the treated fly ash to the designated position, when the device is working, the dust removal mechanism 3 sprays water to reduce dust.

[0034] When the untreated fly ash is screened and crushed, the crushing motor 501 is started, the output end of the crushing motor 501 drives the main belt pulley 502 to rotate, under the action of the power belt 503, the main belt pulley 502 drives the auxiliary belt pulley 504 to rotate, the auxiliary belt pulley 504 drives the main crushing roller 505 to rotate, the main crushing roller 505 is connected with the auxiliary crushing roller 506 through gear meshing, the main crushing roller 505 drives the auxiliary crushing roller 506 to rotate, the main crushing roller 505 and the auxiliary crushing roller 506 rotate to crush the coarse particle fly ash, which increases the utilization efficiency of the fly ash, the auxiliary crushing roller 506 drives the synchronous wheels 507 at both ends to rotate, under the action of the synchronous belt 601, the synchronous wheels 507 drive the screening belt pulley 602 to rotate, the screening belt pulley 602 drives the eccentric wheel 603 to rotate, the eccentric wheel 603 pulls the screening arm 604 to move downward and reciprocate at a small amplitude, the screening arm 604 pulls the screening shaft 605 to reciprocate in the oval-shaped sliding groove, the screening shaft 605 reciprocates in the oval-shaped sliding groove and pulls the screen plate 609 to move downward and reciprocate at a small amplitude, the screen plate 609 separates the coarse and fine particles of the fly ash by moving downward and reciprocating at a small amplitude, the fine particle fly ash after screening falls into the ash falling pipeline 8, the screen plate 609 drives the reset block 606 to reciprocate in the square-shaped sliding groove by moving downward and reciprocating at a small amplitude, the reset block 606 reciprocates in the square-shaped sliding groove and compresses the reset spring 607, the screen plate 609 is arranged obliquely, the end close to the crushing mechanism 5 is lower, which facilitates the coarse particle fly ash to enter the crushing mechanism 5.

[0035] When the oscillation mechanism 4 shakes off the fine particle fly ash adhered to the inner wall of the fly ash falling pipe 8, the oscillation motor 402 is started, the output end of the oscillation motor 402 drives the main bevel gear 403 to rotate, the main bevel gear 403 is meshed and connected with the auxiliary bevel gear 404, the main bevel gear 403 drives the auxiliary bevel gear 404 to rotate, the auxiliary bevel gear 404 drives the transmission shaft 407 to rotate, the transmission shaft 407 drives the cam 405 to rotate, the cam 405 rotates and contacts the trigger column 408, the cam 405 drives the trigger column 408 to slide to the inside of the fly ash falling pipe 8, the trigger column 408 slides to the inside of the fly ash falling pipe 8 and drives the oscillation plate 410 to rotate inward by a certain angle with the end rotating shaft as the center, the oscillation plate 410 rotates inward by a certain angle with the end rotating shaft as the center and stretches the tension spring 411, after the cam 405 is separated from the trigger column 408, the tension spring 411 is contracted and drives the oscillation plate 410 to reset, the oscillation plate 410 is continuously rotated and shakes off the fine particle fly ash adhered to the oscillation plate 410, so that the fly ash falling pipe 8 is prevented from being blocked and the screening discharging effect is improved.

[0036] When the conveying mechanism 2 pushes the treated fly ash to the designated position, the conveying motor 202 is started, the output end of the conveying motor 202 drives the first belt pulley 203 to rotate, under the action of the transmission belt 204, the first belt pulley 203 drives the second belt pulley 205 to rotate, the second belt pulley 205 drives one of the conveying rollers 206 to rotate, under the action of the conveying belt 207, one of the conveying rollers 206 drives the other conveying roller 206 to rotate, and the two conveying rollers 206 rotate and push the treated fly ash on the conveying belt 207 to the designated position.

[0037] When the dust removal mechanism 3 sprays water for dust removal, the water pump 302 is started, the water pump 302 pumps water out of the water tank 301 through the water suction pipe 303, and the water outlet of the water pump 302 pushes the water to the spray pipe 305 through the water delivery pipe 304, and the water is sprayed out of the spray holes on the side of the spray pipe 305 to perform dust removal treatment on the fly ash, which is an important link in environmental protection and industrial production, aiming to reduce the suspended dust particles in the air, improve air quality, and protect the health of workers and the environment.

[0038] The above-described embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, improvements and substitutions can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A fly ash screening device, characterized by, The utility model provides a dust removal device, including the shell (7), the lower side of shell (7) is provided with conveying mechanism (2), the side of shell (7) is provided with dust removal mechanism (3), the inside of shell (7) is provided with the crushing mechanism (5), one side of crushing mechanism (5) is provided with screening mechanism (6), the lower side of screening mechanism (6) is provided with oscillation mechanism (4), the side of shell (7) upper end is fixedly connected with the feed slot (9), the side of shell (7) and the feed slot (9) between fixedly connected with the ash drop pipeline (8), oscillation mechanism (4) including motor frame (401), motor frame (401) with the outside of shell (7) fixedly connected, the upper surface of motor frame (401) is fixedly connected with oscillation motor (402), the output of oscillation motor (402) is fixedly connected with main bevel gear (403), the side of main bevel gear (403) is provided with sub bevel gear (404), main bevel gear (403) is engaged with sub bevel gear (404), the side of sub bevel gear (404) is fixedly connected with transmission shaft (407), the outside of transmission shaft (407) is fixedly connected with two cams (405), the outside of transmission shaft (407) still rotatablely connected with two transmission frames (406), the other end of transmission frame (406) is fixedly connected with ash drop pipeline (8).

2. A fly ash screening device as claimed in claim 1, wherein, Oscillation mechanism (4) still including connecting plate (409), connecting plate (409) with the inside of ash drop pipeline (8) fixedly connected, the other end of connecting plate (409) rotatablely connected with oscillation plate (410) through pivot, the other end of oscillation plate (410) and the inside of ash drop pipeline (8) fixedly connected with two tension springs (411), the other end of oscillation plate (410) is slidably connected with guide strip (412), guide strip (412) with the inside of ash drop pipeline (8) fixedly connected, the side of the other end of oscillation plate (410) is fixedly connected with two trigger columns (408), trigger column (408) and ash drop pipeline (8) slidably connected.

3. A fly ash screening device as claimed in claim 1, wherein, The crushing mechanism (5) comprises a crushing motor (501), the crushing motor (501) is fixedly connected with the shell (7), the output end of the crushing motor (501) is fixedly connected with a main belt pulley (502), the inside of the shell (7) is rotatably connected with a main crushing roller (505), the arc-shaped outer side of the main crushing roller (505) is fixedly connected with a plurality of teeth, the end of the main crushing roller (505) penetrating through the shell (7) and extending to the outside of the shell (7) is fixedly connected with a secondary belt pulley (504), the outer side of the main belt pulley (502) and the secondary belt pulley (504) is sleeved with a power belt (503), the inside of the shell (7) is also rotatably connected with a secondary crushing roller (506), the arc-shaped outer side of the secondary crushing roller (506) is fixedly connected with a plurality of teeth, the main crushing roller (505) and the secondary crushing roller (506) are connected through tooth engagement, and the two ends of the secondary crushing roller (506) penetrating through the shell (7) and extending to the outside of the shell (7) are fixedly connected with synchronous wheels (507).

4. A fly ash screening device as claimed in claim 3, wherein, The screening mechanism (6) comprises a screening belt pulley (602), the screening belt pulley (602) is sleeved with a synchronous belt (601) outside the synchronous wheel (507), the side of the screening belt pulley (602) is fixedly connected with an eccentric wheel (603) through a rotating shaft, the outer side of the rotating shaft is rotatably connected with a screening arm (604), the other end of the screening arm (604) is rotatably connected with a screening shaft (605), the two sides of the feeding groove (9) are provided with an oval-shaped sliding groove, the screening shaft (605) is slidably connected in the oval-shaped sliding groove, the other end of the screening shaft (605) is fixedly connected with a screen plate (609), the two sides of the screen plate (609) are fixedly connected with two reset blocks (606), two square sliding grooves are also formed in the two sides of the feeding groove (9), the reset blocks (606) are slidably connected in the square sliding grooves, the two sides of the feeding groove (9) are fixedly connected with four positioning blocks (608), and the opposite sides of the reset blocks (606) and the positioning blocks (608) are fixedly connected with reset springs (607).

5. A fly ash screening device as claimed in claim 1, wherein, The dust removal mechanism (3) comprises a water tank (301), the water tank (301) is fixedly connected with the outer side of the shell (7), the upper surface of the water tank (301) is fixedly connected with a water suction pipe (303), the other end of the water suction pipe (303) is communicated with a water pump (302), the water pump (302) is fixedly connected with the outer side of the shell (7), the water outlet of the water pump (302) is fixedly connected with a water delivery pipe (304), the other end of the water delivery pipe (304) is fixedly connected with a spraying pipe (305), and a plurality of spraying holes are formed in the side of the spraying pipe (305).

6. A fly ash screening device as claimed in claim 1, wherein, Said conveying mechanism (2) includes conveying frame (201), both ends of conveying frame (201) are rotatably connected with conveying roller (206), both sides of two conveying roller (206) are sleeved with conveying belt (207), the side of conveying frame (201) is fixedly connected with conveying motor (202), the output end of conveying motor (202) is fixedly connected with first belt pulley (203), one of the conveying roller (206) penetrates the end of conveying frame (201) and is fixedly connected with second belt pulley (205), the outer side of first belt pulley (203) and second belt pulley (205) is sleeved with transmission belt (204).

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