A particle size distribution screening device for the utilization of sludge in building materials

Abstract

This utility model provides a particle size distribution screening device for the utilization of sludge in building materials, belonging to the field of building material preparation technology. It addresses the problem that existing methods use inter-particle liquid bridging forces to cause fine particles to agglomerate, affecting sludge screening efficiency. The device includes a screening support, a screening drive motor, a screening drum, an anti-clogging fixing support, a screening spraying component, a screening anti-clogging mechanism, and a screening anti-adhesion mechanism. The screening drive motor is fixedly connected to the upper rear end of the screening support; the screening drum is driven and connected above the screening support wheel; the anti-clogging fixing support is fixedly connected to the upper right side of the screening support; the screening spraying component is rotatably connected to the upper left side of the anti-clogging fixing support; the anti-clogging drive shaft is rotatably connected to the upper inner side of the anti-clogging fixing support; the screening anti-clogging mechanism is located on the right side of the anti-clogging fixing support; and the screening anti-adhesion mechanism is located at both the front and rear ends of the anti-clogging fixing support, reducing sludge adhesion and improving sludge screening efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of building material preparation technology, and more specifically, it relates to a particle size distribution and screening device for the utilization of sludge in building materials. Background Technology

[0002] With the acceleration of urbanization and the continuous growth of sewage treatment volume, the output of sludge is becoming increasingly large. Utilizing sludge for building materials, such as preparing bricks, ceramsite, and concrete aggregates, can not only reduce and render harmless the sludge, but also create certain economic benefits, which is in line with the concept of sustainable development. This is one of the important research directions in sludge treatment. Currently, the equipment used for sludge screening on the market mainly includes drum screening devices, roller screening devices, and vibrating screening devices. Drum screening devices screen dried sludge through an inclined screening mechanism and a filter cylinder. Its advantages are simple structure and stable operation.

[0003] The existing application number is CN202220341385.8. This utility model relates to the technical field of sludge removal equipment, specifically a screening and impurity removal device used in the process of preparing thermal insulation bricks from sludge. It includes a support A, a support B, a filter cylinder, a feed hopper, a screen, a mounting base, a motor, a gear, a gear ring, and a collection assembly. Supports A and B are mounted on the collection assembly. Limiting rings A and B are respectively provided at both ends of the filter cylinder. Limiting ring A is slidably connected to support A, and limiting ring B is slidably connected to support B. The filter cylinder is rotatably connected to supports A and B through limiting rings A and B. The filter cylinder has a trough, and the screen is mounted on the filter cylinder and covers the trough. The filter cylinder also has spiral blades. Limiting ring B has an annular groove, and the gear ring is mounted on limiting ring B. The motor is mounted on support B, and the gear is mounted on the motor's rotating shaft and meshes with the gear ring for transmission. This utility model facilitates the separation of mud and impurities from sludge, is simple to operate, highly efficient, and effective.

[0004] Based on the above, when using a drum screen to screen sludge, the moisture content of the sludge after dewatering is 20%-40%. The liquid bridging force between particles causes fine particles to agglomerate, forming a filter cake layer on the screen. The adhesion work exacerbates the clogging of the pores. The opening rate of the screen for sludge with high organic matter content decreases rapidly, leading to gradation deviation. Frequent shutdowns for rinsing are required, which affects the sludge screening efficiency. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a particle size distribution screening device for the utilization of sludge in building materials. This device solves the problem that when using a drum screen to screen sludge, the moisture content of the dewatered sludge is 20%-40%, and the liquid bridging force between particles causes fine particles to agglomerate, forming a filter cake layer on the screen. This adhesion work exacerbates pore blockage, and the opening rate of the screen for sludge with high organic matter content decreases rapidly, leading to gradation deviation. This necessitates frequent shutdowns for rinsing, thus affecting the sludge screening efficiency.

[0006] The purpose and effectiveness of this utility model's particle size distribution screening equipment for the utilization of sludge in building materials are achieved through the following specific technical means:

[0007] A granular gradation screening device for sludge building material utilization includes a screening support frame, screening support wheels, a screening drive motor, a screening drum, an anti-clogging fixed support, a screening spraying component, an anti-clogging drive shaft, a screening anti-clogging mechanism, and a screening anti-adhesion mechanism. Four sets of screening support wheels are rotatably connected to the upper part of the screening support frame. The screening drive motor is fixedly connected to the upper rear end of the screening support frame and is driven by the screening support wheels. The screening drum is driven by the upper part of the screening support wheels. The anti-clogging fixed support is fixedly connected to the upper right side of the screening support frame. The screening spraying component is rotatably connected to the upper left side of the anti-clogging fixed support and is located inside the screening drum. The anti-clogging drive shaft is rotatably connected to the upper inner side of the anti-clogging fixed support. The screening anti-clogging mechanism is located on the right side of the anti-clogging fixed support. The screening anti-adhesion mechanism is located at both the front and rear ends of the anti-clogging fixed support.

[0008] Furthermore, the screening anti-blocking mechanism includes: an anti-blocking drive motor, a first transmission gear, and a second transmission gear; the anti-blocking drive motor is fixedly connected to the upper right side of the anti-blocking fixed bracket; the first transmission gear is rotatably connected to the upper left side of the anti-blocking fixed bracket, and the first transmission gear is drivingly connected to the anti-blocking drive motor; the second transmission gear is coaxially fixedly connected to the middle position of the anti-blocking transmission shaft, and the second transmission gear meshes with the first transmission gear.

[0009] Furthermore, the screening anti-blocking mechanism also includes: anti-blocking beaters; multiple sets of anti-blocking beaters are provided, each set of anti-blocking beaters is a long strip-shaped rubber strip structure, and the multiple sets of anti-blocking beaters are respectively fixedly connected to the outer periphery of the anti-blocking drive shaft.

[0010] Furthermore, the screening anti-blocking mechanism also includes an anti-blocking backflush component; the anti-blocking backflush component is fixedly connected to the upper left side of the screening support, the right end face of the anti-blocking backflush component is in contact with the outer end face of the screening drum, and the anti-blocking backflush component is externally connected to a pulse dust collector.

[0011] Furthermore, the screening anti-adhesion mechanism includes: an anti-adhesion drive disc and an anti-adhesion drive component; the anti-adhesion drive disc is provided in two sets, and the two sets of anti-adhesion drive discs are coaxially fixedly connected to the front and rear ends of the anti-blocking transmission shaft respectively; the anti-adhesion drive component is provided in two sets, and the two sets of anti-adhesion drive components are fixedly connected to the outer centrifugal part of the anti-adhesion drive disc respectively.

[0012] Furthermore, the screening anti-adhesion mechanism also includes: anti-adhesion drive rods and anti-adhesion limiting grooves; two sets of anti-adhesion drive rods are provided, and the two sets of anti-adhesion drive rods are coaxially fixedly connected to the front and rear ends of the screening and scattering component; two sets of anti-adhesion limiting grooves are provided, and both sets of anti-adhesion limiting grooves are rectangular groove structures. The two sets of anti-adhesion limiting grooves are respectively opened on the inner side of the anti-adhesion drive rods, and the two sets of anti-adhesion drive components are respectively arranged on the inner side of the anti-adhesion limiting grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention utilizes an anti-clogging mechanism in the screening process. An anti-clogging drive motor drives a first transmission gear, which in turn drives a second transmission gear, which in turn drives an anti-clogging transmission shaft. This shaft, in turn, drives an anti-clogging beater, which, under centrifugal force, beats the screening drum, reducing sludge blockage of the drum's screen holes. This reduces downtime for flushing the entire drum screen and improves its overall efficiency. Furthermore, when blockage occurs, the anti-clogging backflushing mechanism activates, allowing high-pressure gas from an external pulse dust collector to be sprayed onto the drum, dislodging the sludge. This combination of proactive prevention and passive unblocking reduces manual intervention and water consumption, achieving energy conservation and cost reduction.

[0015] This invention utilizes a screening anti-adhesion mechanism. The anti-blocking drive shaft rotates, causing the anti-adhesion drive disc to rotate. This rotation, in turn, drives the anti-adhesion drive component. The anti-adhesion drive component, when limited by the anti-adhesion limiting groove, causes the anti-adhesion drive rod to swing. This swinging motion of the anti-adhesion drive rod then causes the screening and spraying component to swing. The swinging component lifts the sludge inside the screening drum, mechanically breaking up particle agglomerates and reducing the impact of liquid bridging. The lifted sludge falls back to the bottom of the screening drum, colliding and dispersing with the inner wall of the drum, thus reducing sludge adhesion and clogging, and improving the screening efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2This is a schematic diagram of the anti-clogging and backflush component structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the anti-blocking and tapping component of this utility model.

[0019] Figure 4 This is a schematic diagram of the screening and spraying component of this utility model.

[0020] Figure 5 This is a schematic diagram of the anti-adhesion drive disk structure of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Screening support; 101. Anti-clogging drive motor; 102. First transmission gear; 103. Second transmission gear; 104. Anti-clogging beater; 105. Anti-clogging backwash; 2. Screening support wheel; 3. Screening drive motor; 4. Screening drum; 5. Anti-clogging fixed bracket; 6. Screening spilling component; 601. Anti-adhesion drive disc; 602. Anti-adhesion drive component; 603. Anti-adhesion drive rod; 604. Anti-adhesion limiting groove; 7. Anti-clogging transmission shaft. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0024] Example 1:

[0025] As attached Figures 1 to 4 As shown:

[0026] This utility model provides a particle size distribution screening device for the utilization of sludge in building materials, including a screening support 1, screening support wheels 2, a screening drive motor 3, a screening drum 4, an anti-clogging fixing bracket 5, a screening spraying component 6, an anti-clogging transmission shaft 7, and a screening anti-clogging mechanism; four sets of screening support wheels 2 are provided, and the four sets of screening support wheels 2 are rotatably connected to the upper part of the screening support 1; the screening drive motor 3 is fixedly connected to the upper rear end of the screening support 1, and the screening drive motor 3 is drivenly connected to the screening support wheels 2; the screening drum 4 is drivenly connected to the upper part of the screening support wheels 2; the anti-clogging fixing bracket 5 is fixedly connected to the upper right side of the screening support 1; the screening spraying component 6 is rotatably connected to the upper left side of the anti-clogging fixing bracket 5, and the screening spraying component 6 is located inside the screening drum 4; the anti-clogging transmission shaft 7 is rotatably connected to the upper inner side of the anti-clogging fixing bracket 5; the screening anti-clogging mechanism is located on the right side of the anti-clogging fixing bracket 5.

[0027] The screening anti-blocking mechanism includes: an anti-blocking drive motor 101, a first transmission gear 102, and a second transmission gear 103; the anti-blocking drive motor 101 is fixedly connected to the upper right side of the anti-blocking fixed bracket 5; the first transmission gear 102 is rotatably connected to the upper left side of the anti-blocking fixed bracket 5, and the first transmission gear 102 is connected to the anti-blocking drive motor 101 in a transmission connection; the second transmission gear 103 is coaxially fixedly connected to the middle position of the anti-blocking transmission shaft 7, and the second transmission gear 103 meshes with the first transmission gear 102.

[0028] The screening anti-blocking mechanism also includes: anti-blocking beaters 104; multiple sets of anti-blocking beaters 104 are provided, and each set of anti-blocking beaters 104 is a long strip rubber strip structure, and the multiple sets of anti-blocking beaters 104 are respectively fixedly connected to the outer periphery of the anti-blocking drive shaft 7.

[0029] The screening anti-blocking mechanism also includes an anti-blocking backflush component 105. The anti-blocking backflush component 105 is fixedly connected to the upper left side of the screening support 1, and the right end face of the anti-blocking backflush component 105 is in contact with the outer end face of the screening drum 4. The anti-blocking backflush component 105 is externally connected to a pulse dust collector.

[0030] The specific usage and function of this embodiment are as follows: When screening sludge, the anti-clogging drive motor 101 is turned on, which drives the first transmission gear 102 to rotate. The rotation of the first transmission gear 102 drives the second transmission gear 103 to rotate, which in turn drives the anti-clogging transmission shaft 7 to rotate. The rotation of the anti-clogging transmission shaft 7 drives the anti-clogging beater 104 to rotate. The rotation of the anti-clogging beater 104, under the action of centrifugal force, beats the screening drum 4, reducing the sludge blockage of the screening drum 4's screen holes, reducing the downtime for rinsing the entire drum screen, and improving the overall working efficiency of the drum screen. At the same time, when the screening drum 4 becomes blocked, the anti-clogging backflush 105 is turned on. The high-pressure gas generated by the external pulse dust collector is sprayed onto the screening drum 4 through the anti-clogging backflush 105, shaking off the sludge blocking the screening drum 4.

[0031] Example 2:

[0032] This utility model provides a particle size distribution screening device for the utilization of sludge in building materials, based on Embodiment 1, such as... Figures 1 to 5 As shown, it also includes a screening and anti-sticking mechanism, which is set at both ends of the anti-blocking fixing bracket 5.

[0033] The screening anti-adhesion mechanism includes: an anti-adhesion drive disc 601 and an anti-adhesion drive component 602; two sets of anti-adhesion drive discs 601 are provided, and the two sets of anti-adhesion drive discs 601 are coaxially fixedly connected to the front and rear ends of the anti-blocking transmission shaft 7; two sets of anti-adhesion drive components 602 are provided, and the two sets of anti-adhesion drive components 602 are fixedly connected to the outer centrifugal part of the anti-adhesion drive disc 601.

[0034] The screening anti-adhesion mechanism also includes: anti-adhesion drive rods 603 and anti-adhesion limiting grooves 604; two sets of anti-adhesion drive rods 603 are provided, and the two sets of anti-adhesion drive rods 603 are coaxially fixedly connected to the front and rear ends of the screening and scattering component 6; two sets of anti-adhesion limiting grooves 604 are provided, and both sets of anti-adhesion limiting grooves 604 are rectangular groove structures. The two sets of anti-adhesion limiting grooves 604 are respectively opened on the inner side of the anti-adhesion drive rods 603, and the two sets of anti-adhesion drive components 602 are respectively arranged on the inner side of the anti-adhesion limiting grooves 604.

[0035] The specific usage and function of this embodiment are as follows: When sludge is screened, as the anti-blocking drive shaft 7 rotates, the anti-blocking drive shaft 7 rotates, which drives the anti-adhesion drive disc 601 to rotate. The anti-adhesion drive disc 601 rotates, which drives the anti-adhesion drive component 602 to rotate. The anti-adhesion drive component 602 rotates under the limit of the anti-adhesion limiting groove 604. At this time, the rotation of the anti-adhesion drive component 602 drives the anti-adhesion drive rod 603 to swing. The swing of the anti-adhesion drive rod 603 drives the screening and spraying component 6 to swing. The swing of the screening and spraying component 6 lifts the sludge inside the screening drum 4. Through mechanical spraying, the particle agglomerates are broken, and the influence of liquid bridge force is reduced. The lifted sludge falls back to the bottom of the screening drum 4. The sludge collides and disperses with the inner wall of the screening drum 4, reducing the adhesion of sludge and reducing the sludge adhesion and blockage of the screening drum 4, thereby improving the sludge screening efficiency.

[0036] The following points should be noted in this article:

[0037] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0038] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0039] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A particle size distribution screening device for the utilization of sludge in building materials, characterized in that: The system includes a screening support frame (1), screening support wheels (2), a screening drive motor (3), a screening drum (4), an anti-clogging fixing bracket (5), a screening spilling component (6), an anti-clogging transmission shaft (7), a screening anti-clogging mechanism, and a screening anti-adhesion mechanism; the screening support wheels (2) are arranged in four sets, and the four sets of screening support wheels (2) are rotatably connected to the top of the screening support frame (1); the screening drive motor (3) is fixedly connected to the upper rear end of the screening support frame (1), and the screening drive motor (3) is connected to the screening support wheels (2) in a transmission connection; the screening drum... (4) The transmission is connected above the screening support wheel (2); the anti-blocking fixed bracket (5) is fixedly connected to the upper right side of the screening bracket (1); the screening spraying component (6) is rotatably connected to the upper left side of the anti-blocking fixed bracket (5), and the screening spraying component (6) is set inside the screening drum (4); the anti-blocking transmission shaft (7) is rotatably connected to the upper inner side of the anti-blocking fixed bracket (5); the screening anti-blocking mechanism is set on the right side of the anti-blocking fixed bracket (5); the screening anti-adhesion mechanism is set at the front and rear ends of the anti-blocking fixed bracket (5).

2. The particle size distribution screening equipment for the utilization of sludge in building materials as described in claim 1, characterized in that: The screening anti-blocking mechanism includes: an anti-blocking drive motor (101), a first transmission gear (102), and a second transmission gear (103); the anti-blocking drive motor (101) is fixedly connected to the upper right side of the anti-blocking fixed bracket (5); the first transmission gear (102) is rotatably connected to the upper left side of the anti-blocking fixed bracket (5), and the first transmission gear (102) is connected to the anti-blocking drive motor (101) in a transmission connection; the second transmission gear (103) is coaxially fixedly connected to the middle position of the anti-blocking transmission shaft (7), and the second transmission gear (103) meshes with the first transmission gear (102).

3. The particle size distribution screening equipment for the utilization of sludge in building materials as described in claim 2, characterized in that: The screening anti-blocking mechanism also includes: anti-blocking beaters (104); the anti-blocking beaters (104) are provided in multiple sets, and the multiple sets of anti-blocking beaters (104) are all long strip rubber strip structures, and the multiple sets of anti-blocking beaters (104) are respectively fixedly connected to the outer periphery of the anti-blocking drive shaft (7).

4. The particle size distribution screening equipment for the utilization of sludge in building materials as described in claim 3, characterized in that: The screening anti-blocking mechanism also includes an anti-blocking backflush component (105); the anti-blocking backflush component (105) is fixedly connected to the upper left side of the screening support (1), the right end face of the anti-blocking backflush component (105) is in contact with the outer end face of the screening drum (4), and the anti-blocking backflush component (105) is connected to an external pulse dust collector.

5. The particle size distribution screening equipment for the utilization of sludge in building materials as described in claim 1, characterized in that: The screening anti-adhesion mechanism includes: an anti-adhesion drive disc (601) and an anti-adhesion drive component (602); the anti-adhesion drive disc (601) is provided in two sets, and the two sets of anti-adhesion drive discs (601) are coaxially fixedly connected to the front and rear ends of the anti-blocking transmission shaft (7); the anti-adhesion drive component (602) is provided in two sets, and the two sets of anti-adhesion drive components (602) are fixedly connected to the outer centrifugal part of the anti-adhesion drive disc (601).

6. The particle size distribution screening equipment for the utilization of sludge in building materials as described in claim 5, characterized in that: The screening anti-adhesion mechanism further includes: an anti-adhesion drive rod (603) and an anti-adhesion limiting groove (604); the anti-adhesion drive rod (603) is provided in two sets, and the two sets of anti-adhesion drive rods (603) are coaxially fixedly connected to the front and rear ends of the screening and spraying component (6); the anti-adhesion limiting groove (604) is provided in two sets, and the two sets of anti-adhesion limiting grooves (604) are both rectangular groove structures. The two sets of anti-adhesion limiting grooves (604) are respectively opened on the inner side of the anti-adhesion drive rod (603), and the two sets of anti-adhesion drive components (602) are respectively arranged on the inner side of the anti-adhesion limiting groove (604).

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