CN118162261A - A screening device for sludge treatment - Google Patents

Abstract

The invention relates to a screening device for sludge treatment, which comprises a box body, a driving mechanism arranged on the box body, a movable box movably arranged in the box body, a screening net arranged on the movable box, a connecting mechanism arranged between the driving mechanism and the movable box, a vibrating mechanism arranged on the screening net, a feeding hopper arranged on the box body, a circulating crushing mechanism arranged on the box body, a discharge pipe with one end fixedly arranged on the movable box and the other end penetrating through the movable box, and a first valve arranged on the discharge pipe. The powder screening net can reciprocate and vibrate up and down, so that sludge is not easy to accumulate on the screening net, subsequent sludge screening is facilitated, large-particle sludge can be screened circularly for multiple times, and the qualification rate and the treatment efficiency of the sludge are greatly improved; the cooperation of a plurality of gears and the setting of two conveyer belts in the bucket overdrive mechanism for remove the reciprocating motion of frame and sieve powder net and stabilize, not only promote the stability of whole device, still increased the life of whole device.

Description

A screening device for sludge treatment

Technical Field

The invention relates to the technical field of sludge treatment, and in particular to a screening device for sludge treatment.

Background technique

Sludge is the sediment discharged from sewage treatment facilities. It is easy to decompose and stink, has fine particles, small specific gravity, high water content and is not easy to dehydrate. It is a hydrophilic substance with a colloidal structure. It is a thick substance between liquid and solid, which can be transported by pumps, but it is difficult to separate solids and liquids through sedimentation.

Sludge screening is an important part of the sludge treatment process, and sludge treatment has particle size requirements. Only sludge that meets the particle size requirements can proceed to the next step of sludge treatment. However, the existing sludge screening device still has the following problems when screening sludge: First, a reciprocating screen is usually used to screen the sludge, but the reciprocating screen has poor vibration effect. After a long period of sludge screening, the sludge will still accumulate on the screen, affecting the sludge screening efficiency; second, a cylinder is often used to realize the reciprocating movement of the screen, and the screen will also generate vibration force during the reciprocating movement. Combined with the principle of action and reaction force, the vibration force will act on the cylinder, making the cylinder unstable and easy to be damaged after long-term use.

Summary of the invention

In view of the problems in the prior art, the present invention provides a screening device for sludge treatment.

The technical solution adopted by the present invention to solve its technical problem is: a screening device for sludge treatment, including a box body, a driving mechanism arranged on the box body, a mobile box movably arranged in the box body, a screening net arranged on the mobile box, a connecting mechanism arranged between the driving mechanism and the mobile box, a vibrating mechanism arranged on the screening net, a top hopper arranged on the box body, a circulating crushing mechanism arranged on the box body, a discharge pipe with one end fixed on the mobile box and the other end passing through the movably arranged on the box body, and a first valve arranged on the discharge pipe; the vibrating mechanism includes a first guide plate and a second guide plate fixedly arranged in the box body, a first chute and a second chute arranged on the mobile box, a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net, a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net, and a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net. A third spring and a fourth spring fixed on the screening net, a first upper sealing plate and a first lower sealing plate fixed on the screening net, a second upper sealing plate and a second lower sealing plate fixed on the screening net, and a round rod passing through and fixed on the screening net; one end of the screening net can be slidably arranged on the first slide groove, and the other end of the screening net can be slidably arranged on the second slide groove; the driving mechanism includes a moving frame, a support plate fixed on the box body, a first base fixed on the support plate, a frame fixed on the support plate, a first shaft body and a second shaft body passing through and rotatably arranged on the frame body, a first motor arranged on the first base and used to drive the first shaft body to rotate, a first gear and a second gear fixedly mounted on the first shaft body, and a third gear and a fourth gear fixedly mounted on the second shaft body.

Specifically, the first guide plate and the second guide plate have the same structure; the first guide plate includes a main body, a plurality of arc-shaped grooves arranged on the main body at equal intervals, and a plurality of arc-shaped protrusions arranged on the main body at equal intervals and fixedly arranged on the main body.

Specifically, the plurality of arc-shaped grooves and the plurality of arc-shaped protrusions are arranged in a staggered manner.

Specifically, the driving mechanism also includes a third shaft body that passes through and is rotatably arranged on the frame, a fifth gear that is fixedly mounted on the third shaft body, a fourth shaft body that passes through and is rotatably arranged on the frame, a sixth gear that is fixedly mounted on the fourth shaft body, a first connecting rod whose one end is fixedly mounted on the third shaft body, a first short shaft that passes through and is rotatably arranged on the first connecting rod, a second connecting rod whose one end is fixedly mounted on the first short shaft and is rotatably arranged on the movable frame at the other end, a first external gear that is fixedly mounted on the first short shaft, a second external gear that is fixedly mounted on the frame, a first conveyor belt whose one end is wound around the first external gear and the other end is wound around the second external gear, a third connecting rod whose one end is fixedly mounted on the fourth shaft body, a second short shaft that passes through and is rotatably arranged on the third connecting rod, a fourth connecting rod whose one end is fixedly mounted on the second short shaft and the other end is rotatably arranged on the movable frame, a third external gear that is fixedly mounted on the second short shaft, a fourth external gear that is fixedly mounted on the frame, and a second conveyor belt whose one end is wound around the third external gear and the other end is wound around the fourth external gear.

Specifically, the first gear is meshed with the third gear, the fourth gear is meshed with the fifth gear, and the second gear is meshed with the sixth gear.

Specifically, the connecting mechanism includes a third slide groove arranged on the box body, a connecting rod with one end fixed on the mobile frame and the other end fixed on the mobile box, and a large sealing plate fixedly sleeved on the connecting rod; the connecting rod can be slidably arranged on the third slide groove.

Specifically, the circulating crushing mechanism includes a crushing box fixed on the box body, a support rod fixed on the box body, a first suction pump arranged on the support rod, a first tube body and a second tube body arranged on the first suction pump, a third tube body with one end fixed on the movable box and the other end passing through the first tube body, a second valve arranged on the second tube body, a third valve arranged on the third tube body, a second base fixed on the crushing box, a rotating shaft passing through and rotatably arranged on the crushing box, a plurality of cutting knives fixed on the rotating shaft, a second motor arranged on the second base and used to drive the rotating shaft to rotate, a second suction pump arranged on the crushing box, a fourth tube body with one end arranged on the suction pump and the other end connected to the crushing box, a fifth tube body with one end arranged on the second suction pump and the other end connected to the upper hopper, a fourth valve arranged on the fourth tube body, and a fifth valve arranged on the fifth tube body.

The beneficial effects of the present invention are:

When in use, the sludge is put into the upper hopper, and then the sludge falls onto the screening net, and the first motor is turned on at the same time. The first motor drives the driving mechanism to work, and the driving mechanism makes the third shaft and the fourth shaft rotate simultaneously when working, and through the cooperation between multiple gears and the setting of two conveyor belts, the reciprocating movement of the moving frame, the moving box and the powder screening net is stable, which not only improves the stability of the entire device, but also increases the service life of the entire device. Therefore, compared with the method of using cylinders, the driving mechanism of the present invention is not only stable during operation, but also has a long service life; when the moving frame drives the moving box and the screening net to reciprocate, the sludge is dispersed to various positions of the screening net and will not accumulate together, so that the sludge can be better screened by the screening net. After screening, small particles of sludge fall below the box, and at the same time, when the moving box and the powder screening net are reciprocating, the setting of the second guide plate of the first guide plate makes the screening The separation net also vibrates in the upward and downward directions on the moving box, so that the sludge collides with the screening net, thereby better dispersing the sludge and avoiding the sludge from accumulating on the screening net, so that the sludge is better screened by the powder screening net, and the screening effect is good; after screening, small particles of sludge fall to the bottom of the box, and large particles of sludge remain on the screening net, and then the first suction pump is turned on to suck the sludge on the screening net into the crushing box, and then the second motor is turned on to crush and separate the sludge through multiple cutting knives, so that the sludge is broken into small particles of sludge, and then the second suction pump is turned on to suck the crushed sludge into the upper hopper, and the sludge falls into the box again through the upper hopper and is re-screened. If there are still large particles of sludge, the screening can be repeated for multiple times, so that the sludge can be screened for multiple cycles, which greatly improves the qualified rate of sludge particle size and also greatly improves the sludge treatment efficiency; finally, the treated sludge is discharged through the discharge pipe.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a front view of the present invention;

Fig. 3 is a cross-sectional view of line A-A in Fig. 2;

Fig. 4 is a cross-sectional view of the structure along line B-B in Fig. 3;

FIG5 is an enlarged view of point A in FIG4 ;

FIG6 is an enlarged view of point B in FIG4 ;

Fig. 7 is a cross-sectional view of line C-C in Fig. 2;

Fig. 8 is a cross-sectional view along line D-D in Fig. 7;

FIG9 is a schematic diagram of a partial structure of the present invention;

FIG10 is a schematic diagram of a partial structure of the present invention;

FIG. 11 is a partial structural schematic diagram of the present invention.

In the figure: 1, box; 2, driving mechanism; 3, mobile box; 4, screening net; 5, connecting mechanism; 6, vibration mechanism; 7, upper hopper; 8, circulating crushing mechanism; 9, discharge pipe; 10, first valve; 61, first guide plate; 62, second guide plate; 63, first slide; 64, second slide; 65, first spring; 66, second spring; 67, third spring; 68, fourth spring; 69, first upper sealing plate; 610, first Lower sealing plate; 611, second upper sealing plate; 612, second lower sealing plate; 613, round rod; 6011, body; 6012, arc groove; 6013, arc convex block; 20, mobile frame; 21, support plate; 22, first base; 23, frame; 24, first shaft; 25, second shaft; 26, first motor; 27, first gear; 28, second gear; 29, third gear; 210, fourth gear; 211, third Axis body; 212, fifth gear; 213, fourth shaft body; 214, sixth gear; 215, first connecting rod; 216, first short shaft; 217, second connecting rod; 218, first external gear; 219, second external gear; 220, first conveyor belt; 221, third connecting rod; 222, second short shaft; 223, fourth connecting rod; 224, third external gear; 225, fourth external gear; 226, second conveyor belt; 51, third slide; 52. Connecting rod; 53. Large sealing plate; 81. Crushing box; 82. Support rod; 83. First suction pump; 84. First tube body; 85. Second tube body; 86. Third tube body; 87. Second valve; 88. Third valve; 89. Second base; 810. Rotating shaft; 811. Cutting knife; 812. Second motor; 813. Second suction pump; 814. Fourth tube body; 815. Fifth tube body; 816. Fourth valve; 817. Fifth valve.

Detailed ways

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

As shown in Figures 1 to 11, a screening device for sludge treatment according to the present invention comprises a box body 1, a driving mechanism 2 arranged on the box body, a mobile box 3 movably arranged in the box body, a screening net 4 arranged on the mobile box, a connecting mechanism 5 arranged between the driving mechanism and the mobile box, a vibrating mechanism 6 arranged on the screening net, an upper hopper 7 arranged on the box body, a circulating crushing mechanism 8 arranged on the box body, a discharge pipe 9 fixed at one end on the mobile box and passing through the other end movably arranged on the box body, and a first valve 10 arranged on the discharge pipe; the vibrating mechanism 6 comprises a first guide plate 61 and a second guide plate 62 fixedly arranged in the box body, a first chute 63 and a second chute 64 arranged on the mobile box, a first spring 65 and a second spring 66 fixed at one end on the mobile box and the other end on the screening net, a third spring 66 fixed at one end on the mobile box and the other end on the screening net Spring 67 and fourth spring 68, a first upper sealing plate 69 and a first lower sealing plate 610 fixed on the screening net, a second upper sealing plate 611 and a second lower sealing plate 612 fixed on the screening net, and a round rod 613 passing through and fixed on the screening net; one end of the screening net 4 is slidably arranged on the first slide groove, and the other end of the screening net 4 is slidably arranged on the second slide groove; the driving mechanism 2 includes a moving frame 20, a support plate 21 fixed on the box body, a first base 22 fixed on the support plate, a frame 23 fixed on the support plate, a first shaft 24 and a second shaft 25 passing through and rotatably arranged on the frame, a first motor 26 arranged on the first base and used to drive the first shaft to rotate, a first gear 27 and a second gear 28 fixedly sleeved on the first shaft body, a third gear 29 and a fourth gear 210 fixedly sleeved on the second shaft body. When in use, the sludge is put into the upper hopper, and then the sludge falls onto the screening net, and the first motor is turned on at the same time. The first motor drives the driving mechanism to work. When the driving mechanism is working, the third shaft body and the fourth shaft body rotate at the same time, and through the cooperation between multiple gears, the reciprocating movement of the movable frame is stable, and then the reciprocating movement of the movable box and the powder screening net is stable, which not only improves the stability of the entire device, but also further increases the service life of the entire driving mechanism. Therefore, compared with the method of using a cylinder, the driving mechanism of the present invention is not only stable during operation, but also has a long service life; when the movable frame reciprocates, it also drives the movable box and the screening net to reciprocate, so that the sludge is dispersed to various positions of the screening net and will not pile up together, so that the sludge can be better screened by the screening net, so that small particles of sludge fall below the box, and at the same time, when the movable box and the powder screening net reciprocate, through the setting of the second guide plate of the first guide plate, the round rod also vibrates in the up and down direction during the reciprocating movement, so that the powder screening net can reciprocate back and forth and reciprocate up and down. Vibration, The vibration effect is good, which makes the sludge spread out better and facilitates sludge screening; when the screening net vibrates up and down, its two ends slide on the first chute and the second chute respectively, and at the same time the first spring to the fourth spring are extended and retracted, so that the sludge collides with the screening net, so that the sludge is dispersed and the sludge is prevented from accumulating on the screening net, so that the sludge can be better screened by the powder screening net, and the screening effect is good; after screening, small particles of sludge fall to the bottom of the box, and large particles of sludge remain on the screening net, and then the first suction pump is turned on to suck the sludge on the screening net into the crushing box Then, the second motor is turned on to break and separate the sludge through multiple cutting knives, so that the sludge is broken into small particles. Then, the second suction pump is turned on to suck the broken sludge into the upper hopper, and the sludge falls into the box again through the upper hopper and is re-screened. If there are still large particles of sludge, the screening can be repeated many times, so that the sludge can be screened many times in a cycle, which greatly improves the qualified rate of sludge particle size and the sludge treatment efficiency. Finally, the first valve is opened to discharge the treated sludge through the discharge pipe.

Specifically, the first guide plate 61 and the second guide plate 62 have the same structure; the first guide plate 61 includes a body 6011, a plurality of arc grooves 6012 arranged on the body at equal intervals, and a plurality of arc protrusions 6013 arranged on the body at equal intervals. When the round rod reciprocates, the round rod is guided by the plurality of arc grooves and the plurality of arc protrusions so that the round rod continuously vibrates in the up-and-down direction, so that the screening net vibrates in the up-and-down direction while reciprocating, so that the sludge is dispersed and the sludge is prevented from accumulating on the screening net.

Specifically, the plurality of arc grooves 6012 and the plurality of arc protrusions 6013 are arranged alternately, so that the round rods are constantly vibrating in the up-and-down direction, and the screening net is vibrating in the up-and-down direction while reciprocating, which has a better vibration effect, disperses the sludge, avoids the sludge from accumulating on the screening net, and further enables the sludge to be screened better.

Specifically, the driving mechanism 2 also includes a third shaft 211 that passes through and is rotatably arranged on the frame, a fifth gear 212 that is fixedly sleeved on the third shaft, a fourth shaft 213 that passes through and is rotatably arranged on the frame, a sixth gear 214 that is fixedly sleeved on the fourth shaft, a first connecting rod 215 with one end fixedly sleeved on the third shaft, a first short shaft 216 that passes through and is rotatably arranged on the first connecting rod, a second connecting rod 217 with one end fixedly sleeved on the first short shaft and the other end rotatably arranged on the movable frame, a first external gear 218 that is fixedly sleeved on the first short shaft, and a first connecting rod 219 that is fixedly sleeved on the first short shaft. a second external gear 219 on the frame, a first conveyor belt 220 with one end wound around the first external gear and the other end wound around the second external gear, a third connecting rod 221 with one end fixedly mounted on the fourth shaft, a second short shaft 222 rotatably arranged on the third connecting rod, a fourth connecting rod 223 with one end fixedly mounted on the second short shaft and the other end rotatably arranged on the movable frame, a third external gear 224 fixedly mounted on the second short shaft, a fourth external gear 225 fixedly mounted on the frame, and a second conveyor belt 226 with one end wound around the third external gear and the other end wound around the fourth external gear. When the first motor is working, it drives the first shaft to rotate, and at the same time drives the first gear and the second gear on the first shaft to rotate. Since the first gear is meshed with the third gear and the second gear is meshed with the sixth gear, the third gear and the sixth gear are driven to rotate, and then the second shaft, the fourth gear, and the fourth shaft are driven to rotate. Since the fourth gear is meshed with the fifth gear, the fifth gear is also driven to rotate. When the fifth gear rotates, it drives the third shaft to rotate. When the third shaft rotates, it drives the first connecting rod to rotate around the third shaft, and then drives the second connecting rod to rotate, and at the same time, the first conveyor belt rotates around the third shaft, and at the same time, when the fourth shaft rotates, it also drives the third connecting rod to rotate around the fourth shaft, and then drives the fourth connecting rod to rotate, and at the same time, the second conveyor belt rotates around the fourth shaft, so that the moving frame continuously reciprocates. Due to the coordinated arrangement of multiple gears and the arrangement of two conveyor belts, the entire transmission work is more stable, and the reciprocating movement of the screening net is more stable, thereby greatly improving the service life of the entire device.

Specifically, the first gear 27 is meshed with the third gear 29, the fourth gear 210 is meshed with the fifth gear 211, and the second gear 25 is meshed with the sixth gear 214. The first gear is meshed with the third gear, so that the second shaft body is driven to rotate when the first shaft body rotates; the fourth gear is meshed with the fifth gear, so that the third shaft body is driven to rotate when the second shaft body rotates; the second gear is meshed with the sixth gear, so that the fourth shaft body is driven to rotate when the first shaft body rotates, so as to achieve the effect of overall transmission work being coherent and reasonably connected.

Specifically, the connecting mechanism 5 includes a third slide 51 provided on the box body, a connecting rod 52 with one end fixed on the mobile frame and the other end fixed on the mobile box, and a large sealing plate 53 fixedly sleeved on the connecting rod; the connecting rod 52 is slidably provided on the third slide. When the mobile frame reciprocates, it also drives the connecting rod and the large sealing plate to reciprocate, and then drives the mobile box and the screening net to reciprocate, so that the sludge falling from the upper hopper falls evenly on various positions of the screening net, avoiding the sludge from accumulating on the screening net.

Specifically, the circulating crushing mechanism 8 includes a crushing box 81 fixed on the box body, a support rod 82 fixed on the box body, a first suction pump 83 provided on the support rod, a first tube body 84 and a second tube body 85 provided on the first suction pump, a third tube body 86 fixed on the mobile box at one end and penetrating the other end and movably provided on the first tube body, a second valve 87 provided on the second tube body, a third valve 88 provided on the third tube body, a second base 89 fixed on the crushing box, a rotating shaft 810 rotatably provided on the crushing box, a plurality of cutting knives 811 fixed on the rotating shaft, a second motor 812 provided on the second base and used for driving the rotating shaft to rotate, a second suction pump 813 provided on the crushing box, a fourth tube body 814 provided at one end on the suction pump and connected to the crushing box at the other end, a fifth tube body 815 provided at one end on the second suction pump and connected to the upper hopper at the other end, a fourth valve 816 provided on the fourth tube body, and a fifth valve 817 provided on the fifth tube body. After the sludge is screened, small particles of sludge fall below the box, and this part of the sludge meets the particle size requirement, while large particles of sludge remain on the screening net, and this part of the sludge does not meet the particle size requirement; then open the first suction pump, and at the same time open the second valve and the third valve, suck the sludge on the screening net through the first suction pump, and discharge it into the crushing box through the third pipe body, the first pipe body, and the second pipe body in turn, and then close the first suction pump, the second valve and the third valve; then turn on the second motor, and when the second motor is working, it drives the shaft to rotate, and at the same time drives the multiple cutting knives on the shaft to rotate, The sludge in the crushing box is crushed and separated by multiple cutting knives, so that large particles of sludge are dispersed into small particles of sludge, and then the second motor is turned off; then the fourth valve and the fifth valve are opened, and the second suction pump is opened, the sludge in the crushing box is sucked in by the second suction pump, and is discharged into the upper hopper through the fourth pipe body and the fifth pipe body in turn, and falls into the box body through the upper hopper for re-screening; if large particles of sludge still exist after screening, the screening can be repeated multiple times, so that the sludge can be screened multiple times in a cycle, which greatly improves the qualified rate of sludge particle size, and also greatly improves the sludge treatment efficiency.

The first motor and the second motor are both available on the market, and the first suction pump and the second suction pump are prior art, which will not be elaborated in detail here.

It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims (7)

1. A screening plant for sludge treatment, characterized in that: the device comprises a box body (1), a driving mechanism (2) arranged on the box body (1), a movable box (3) movably arranged in the box body (1), a screening net (4) arranged on the movable box (3), a connecting mechanism (5) arranged between the driving mechanism (2) and the movable box (3), a vibrating mechanism (6) arranged on the screening net (4), a feeding hopper (7) arranged on the box body (1), a circulating crushing mechanism (8) arranged on the box body (1), a discharging pipe (9) with one end fixedly arranged on the movable box (3) and the other end penetrating through the movable box body (1), and a first valve (10) arranged on the discharging pipe (9); the vibrating mechanism (6) comprises a first guide plate (61) and a second guide plate (62) which are fixedly arranged in the box body (1), a first chute (63) and a second chute (64) which are arranged on the movable box (3), a first spring (65) and a second spring (66) which are fixedly arranged on the movable box (3) at one end and fixedly arranged on the screening net (4) at the other end, a third spring (67) and a fourth spring (68) which are fixedly arranged on the movable box (3) and fixedly arranged on the screening net (4) at the other end, a first upper sealing plate (69) and a first lower sealing plate (610) which are fixedly arranged on the screening net (4), a second upper sealing plate (611) and a second lower sealing plate (612) which are fixedly arranged on the screening net (4) and a round rod (613) which penetrates and is fixedly arranged on the screening net (4); one end of the screening net (4) is slidably arranged on the first chute (63), and the other end of the screening net (4) is slidably arranged on the second chute (64); the driving mechanism (2) comprises a movable frame (20), a supporting plate (21) fixedly arranged on the box body (1), a first base (22) fixedly arranged on the supporting plate (21), a frame body (23) fixedly arranged on the supporting plate (21), a first shaft body (24) and a second shaft body (25) which are rotatably arranged on the frame body (23) in a penetrating mode, a first motor (26) arranged on the first base (22) and used for driving the first shaft body (24) to rotate, a first gear (27) and a second gear (28) fixedly sleeved on the first shaft body (24), and a third gear (29) and a fourth gear (210) fixedly sleeved on the second shaft body (25).

2. A screening device for sludge treatment as claimed in claim 1, wherein: the first guide plate (61) and the second guide plate (62) are arranged in the same structure; the first guide plate (61) comprises a body (6011), a plurality of arc-shaped grooves (6012) which are equidistantly arranged on the body (6011), and a plurality of arc-shaped protruding blocks (6013) which are equidistantly arranged on the body (6011) in a fixed mode.

3. A screening device for sludge treatment as claimed in claim 2, wherein: the arc grooves (6012) and the arc protruding blocks (6013) are arranged in a one-to-one staggered mode.

4. A screening device for sludge treatment as claimed in claim 1, wherein: the driving mechanism (2) further comprises a third shaft body (211) which penetrates through the frame body (23) in a rotatable mode, a fifth gear (212) which is fixedly sleeved on the third shaft body (211), a fourth shaft body (213) which penetrates through the frame body (23) in a rotatable mode, a sixth gear (214) which is fixedly sleeved on the fourth shaft body (213), a first connecting rod (215) which is fixedly sleeved on the third shaft body (211) at one end, a first short shaft (216) which penetrates through the first connecting rod (215) in a rotatable mode, a second connecting rod (217) which is fixedly sleeved on the first short shaft (216) in a rotatable mode and is rotatably sleeved on the movable frame (20) at the other end, a first external gear (218) which is fixedly sleeved on the first short shaft (216), a second external gear (219) which is fixedly sleeved on the frame body (23), a first conveying belt (220) which is fixedly sleeved on the first external gear (218) at one end and a first conveying belt (220) which is fixedly sleeved on the second external gear (219) at the other end, a third connecting rod (221) which is fixedly sleeved on the fourth shaft body (213) in a rotatable mode, a second connecting rod (222) which is rotatably sleeved on the second external gear (222) is fixedly sleeved on the second short shaft (222) which is rotatably sleeved on the other end of the first external gear (222) which is fixedly sleeved on the movable frame (23) A fourth external gear (225) fixedly arranged on the frame body (23), and a second conveyor belt (226) with one end wound on the third external gear (224) and the other end wound on the fourth external gear (225).

5. The screening device for sludge treatment as claimed in claim 4, wherein: the first gear (27) is meshed with the third gear (29), the fourth gear (210) is meshed with the fifth gear (211), and the second gear (25) is meshed with the sixth gear (214).

6. A screening device for sludge treatment as claimed in claim 1, wherein: the connecting mechanism (5) comprises a third sliding groove (51) arranged on the box body (1), a connecting rod (52) with one end fixedly arranged on the movable frame (20) and the other end fixedly arranged on the movable box (3), and a large sealing plate (53) fixedly sleeved on the connecting rod (52); the connecting rod (52) is slidably arranged on the third sliding groove (51).

7. A screening device for sludge treatment as claimed in claim 1, wherein: the circulating crushing mechanism (8) comprises a crushing box (81) fixedly arranged on the box body (1), a supporting rod (82) fixedly arranged on the box body (1), a first suction pump (83) arranged on the supporting rod (82), a first pipe body (84) and a second pipe body (85) arranged on the first suction pump (83), a third pipe body (86) with one end fixedly arranged on the movable box (3) and the other end penetrating through the movable box body (84), a second valve (87) arranged on the second pipe body (85), a third valve (88) arranged on the third pipe body (86), a second base (89) fixedly arranged on the crushing box (81), a rotating shaft (810) penetrating through the rotatable box (81), a plurality of cutting knives (811) fixedly arranged on the rotating shaft (810), a second motor (812) arranged on the second base (89) and used for driving the rotating shaft (810), a second suction pump (813) arranged on the crushing box (81), a second pipe body (814) with one end penetrating through the movable box body (84), a fifth pipe (813) arranged on the other end arranged on the crushing box (814) and the fourth pipe body (815), and communicated with the fourth pipe body (815) arranged on the fourth pipe body (81) And a fifth valve (817) arranged on the fifth pipe body (815).