Heavy sludge screening device

Abstract

The utility model relates to the technical field of sludge screening, and discloses a heavy sludge screening device which comprises a placing box and a sludge screening device body, a protective shell is installed above the placing box, the sludge screening device body is installed in an inner cavity of the protective shell, and a circular ring installation plate is integrally installed on the outer side wall of the sludge screening device body. The circular ring mounting plate is fixedly connected to the protective shell, a first semicircular screening plate and a second semicircular screening plate are arranged in an inner cavity of the sludge screening device body, rectangular notches are formed in the two opposite side walls of the sludge screening device body and are symmetrical to each other, and rotating mechanisms are arranged in inner cavities of the two rectangular notches; the rotating mechanism fixedly penetrates through the first semicircular screening plate and the second semicircular screening plate, the rotating mechanism is used for driving the first semicircular screening plate and the second semicircular screening plate to rotate, storage boxes are fixedly mounted at the bottoms of the first semicircular screening plate and the second semicircular screening plate correspondingly, and the two storage boxes are symmetrical to each other; and moving mechanisms are arranged at the bottoms of the first semicircular screening plate and the second semicircular screening plate. The utility model is more practical, and is suitable for wide popularization and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge screening, and specifically relates to a heavy sludge screening device. Background Art

[0002] The heavy (granular) sludge screening system continuously cultivates and screens heavy sludge with a larger specific gravity to optimize the microbial population, improve sludge settling properties, increase the microbial concentration in the reaction tank, and achieve the purpose of improving the biological denitrification and phosphorus removal effect, improving effluent water quality, and increasing sewage treatment capacity.

[0003] However, the existing heavy (granular) sludge screening system is prone to cause heavy sludge with higher specific gravity and sludge with lower specific gravity to accumulate on the screening plate to a certain extent during screening. At this time, the sludge with lower specific gravity cannot be screened, resulting in low screening efficiency.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A heavy sludge screening device comprises a placement box and a sludge screen body, a protective shell is installed above the placement box, the sludge screen body is installed in the inner cavity of the protective shell, a circular mounting plate is integrally installed on the outer wall of the sludge screen body, the circular mounting plate is fixedly connected to the protective shell, a first semicircular screening plate and a second semicircular screening plate are arranged in the inner cavity of the sludge screen body, rectangular notches are opened on the opposite side walls of the sludge screen body, the two rectangular notches are symmetrical to each other, a rotating mechanism is arranged in the inner cavity of the two rectangular notches, and the rotating mechanism is fixedly passed through the first semicircular screening plate and the second semicircular screening plate respectively, the rotating mechanism is used to drive the first semicircular screening plate and the second semicircular screening plate to rotate, the first semicircular screening plate and the second semicircular screening plate are fixedly installed with storage boxes at the bottom, the two storage boxes are symmetrical to each other, and the first semicircular screening plate and the second semicircular screening plate are provided with moving mechanisms at the bottom. When the activated sludge with a larger specific gravity and a denser surface will accumulate on the first semicircular screening plate and the second semicircular screening plate, when it accumulates to a certain extent, the first semicircular screening plate and the second semicircular screening plate will be able to flip over with the assistance of the first rotating rod and the second rotating rod respectively, so that the activated sludge with a larger specific gravity and a denser surface will fall to the bottom of the sludge screener body, and will be refluxed and stored through the heavy sludge discharge pipe; therefore, the sludge after screening has a larger specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation property; at the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0007] As a preferred embodiment of the utility model, the rotating mechanism includes a first rotating rod, bearings are arranged at both ends of the first rotating rod, the two bearings are respectively mounted on the inner walls of the two rectangular notches, and the first rotating rod is fixedly passed through the first semicircular screening plate. The installation position and components of the rotating mechanism are determined.

[0008] As a preferred embodiment of the utility model, the rotating mechanism further includes a second rotating rod, bearings are arranged at both ends of the second rotating rod, the two bearings are respectively mounted on the inner walls of the two rectangular notches, and the second rotating rod is fixedly passed through the second semicircular screening plate. The installation position and components of the rotating mechanism are determined.

[0009] As a preferred embodiment of the utility model, the moving mechanism includes a circular plug-in cylinder, the circular plug-in cylinder is fixedly installed at the bottom of the inner cavity of the sludge screen body, a circular plug-in rod is plugged into the inner cavity of the circular plug-in cylinder, a baffle is fixedly installed at one end of the circular plug-in rod away from the circular plug-in cylinder, and the end of the baffle away from the circular plug-in rod is fitted on a side wall opposite to the bottom of the first semicircular screening plate and the second semicircular screening plate. The installation position and components of the moving mechanism are determined.

[0010] As a preferred embodiment of the utility model, a return spring is fixedly installed at one end of the circular plug rod in the inner cavity of the circular plug cylinder, and the other end of the return spring is fixedly connected to the bottom of the inner cavity of the circular plug cylinder. It is ensured that when the sludge falls into the first semicircular screening plate and the second semicircular screening plate, the return spring can move downward under the action of gravity, and when the sludge falls, the first semicircular screening plate and the second semicircular screening plate can be reset with the help of the return spring, so that the screening effect can be better.

[0011] As a preferred embodiment of the utility model, the side wall of the sludge screen body is provided with two symmetrical circular holes for light sludge, and the bottom of the sludge screen body is provided with four circular holes for heavy sludge distributed in a circle, each of the circular holes for light sludge and the circular holes for heavy sludge respectively penetrate the protective shell and the placement box, and each of the circular holes for light sludge and the circular holes for heavy sludge is respectively installed with a light sludge discharge pipe and a heavy sludge discharge pipe, each of the light sludge discharge pipes is connected to each other, and the other end penetrates the placement box, and each of the heavy sludge discharge pipes is connected to each other, and the other end penetrates the placement box. When the specific gravity is lighter and the looser sludge is screened separately, it can pass through the first semicircular screening plate and the second semicircular screening plate and fall into the storage box, and be discharged to the sludge concentration tank through the light sludge discharge pipe. When the specific gravity is larger and the denser activated sludge is more dense, it will fall to the bottom of the sludge screener body and be refluxed and stored through the heavy sludge discharge pipe. Therefore, the sludge after screening has a larger specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation property. At the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] According to the utility model, when sludge falls into the first semicircular screening plate and the second semicircular screening plate, the first semicircular screening plate and the second semicircular screening plate will be able to flip over under the action of gravity, and they can squeeze the baffle plate to move downward, and the baffle plate can squeeze the circular plug-in rod to move downward, so the extrusion reset spring can move downward, and when the sludge falls once, the first semicircular screening plate and the second semicircular screening plate can be reset with the assistance of the reset spring, so that the screening effect can be better.

[0014] According to the utility model, when the activated sludge with a larger specific gravity and a denser surface will be accumulated on the first semicircular screening plate and the second semicircular screening plate, when it is accumulated to a certain extent, the first semicircular screening plate and the second semicircular screening plate will be able to be turned over respectively with the assistance of the first rotating rod and the second rotating rod, so that the activated sludge with a larger specific gravity and a denser surface will fall to the bottom of the sludge screener body, and will be refluxed and stored through the heavy sludge discharge pipe; therefore, the sludge after screening has an increased specific gravity and a higher sedimentation rate, which can effectively improve the sedimentation property of the sludge; at the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0015] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the protective shell structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the sludge screen of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the sludge screen body of the utility model;

[0021] Figure 5 This is a schematic diagram of the partial structure of the sludge screen body of the utility model;

[0022] Figure 6 It is a schematic diagram of the local structure of point A of the utility model.

[0023] In the figure: 1. placement box; 2. protective shell; 3. sludge screen body; 4. heavy sludge discharge pipe; 5. light sludge discharge pipe; 6. light sludge circular hole; 7. heavy sludge circular hole; 8. first semicircular screening plate; 9. second semicircular screening plate; 10. storage box; 11. baffle; 12. circular plug-in rod; 13. circular plug-in cylinder; 14. reset spring; 15. circular ring mounting plate; 16. rectangular notch; 17. bearing; 18. second rotating rod; 19. first rotating rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0025] like Figures 1 to 6 As shown, a heavy sludge screening device comprises a placement box 1 and a sludge screener body 3, a protective shell 2 is installed above the placement box 1, the sludge screener body 3 is installed in the inner cavity of the protective shell 2, a circular mounting plate 15 is integrally installed on the outer wall of the sludge screener body 3, the circular mounting plate 15 is fixedly connected to the protective shell 2, a first semicircular screening plate 8 and a second semicircular screening plate 9 are arranged in the inner cavity of the sludge screener body 3, rectangular notches 16 are opened on the opposite side walls of the sludge screener body 3, the two rectangular notches 16 are symmetrical to each other, a rotating mechanism is arranged in the inner cavity of the two rectangular notches 16, and the rotating mechanism is respectively fixed through the first semicircular screening plate 8 and the second semicircular screening plate 9, the rotating mechanism is used to drive the first semicircular screening plate 8 and the second semicircular screening plate 9 to rotate, a storage box 10 is fixedly installed at the bottom of the first semicircular screening plate 8 and the second semicircular screening plate 9, the two storage boxes 10 are symmetrical to each other, and a moving mechanism is arranged at the bottom of the first semicircular screening plate 8 and the second semicircular screening plate 9. When the activated sludge with a larger specific gravity and a denser surface will accumulate on the first semicircular screening plate 8 and the second semicircular screening plate 9, when it accumulates to a certain extent, the first semicircular screening plate 8 and the second semicircular screening plate 9 will be able to flip over with the assistance of the first rotating rod 19 and the second rotating rod 18 respectively, so that the activated sludge with a larger specific gravity and a denser surface will fall to the bottom of the sludge screener body 3, and will be refluxed and stored through the heavy sludge discharge pipe 4; therefore, the sludge after screening has a larger specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation property; at the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0026] In a specific embodiment, the rotating mechanism includes a first rotating rod 19, both ends of which are provided with bearings 17, the two bearings 17 are respectively mounted on the inner walls of the two rectangular slots 16, and the first rotating rod 19 is fixedly passed through the first semicircular screening plate 8. In this configuration, the installation position and components of the rotating mechanism are determined.

[0027] Furthermore, the rotating mechanism further includes a second rotating rod 18, both ends of which are provided with bearings 17, the two bearings 17 are respectively mounted on the inner walls of the two rectangular notches 16, and the second rotating rod 18 is fixedly passed through the second semicircular screening plate 9. In this configuration, the installation position and components of the rotating mechanism are determined.

[0028] Further, the moving mechanism includes a circular plug-in cylinder 13, which is fixedly mounted at the bottom of the inner cavity of the sludge screen body 3, a circular plug-in rod 12 is plugged into the inner cavity of the circular plug-in cylinder 13, a baffle 11 is fixedly mounted on one end of the circular plug-in rod 12 away from the circular plug-in cylinder 13, and an end of the baffle 11 away from the circular plug-in rod 12 is fitted on a side wall opposite to the bottom of the first semicircular screening plate 8 and the second semicircular screening plate 9. In this configuration, the installation position and components of the moving mechanism are determined.

[0029] Furthermore, a return spring 14 is fixedly mounted on one end of the circular plug rod 12 in the inner cavity of the circular plug cylinder 13, and the other end of the return spring 14 is fixedly connected to the bottom of the inner cavity of the circular plug cylinder 13. In this arrangement, it is ensured that when the sludge falls into the first semicircular screening plate 8 and the second semicircular screening plate 9, the return spring 14 can move downward under the action of gravity. When the sludge falls, the first semicircular screening plate 8 and the second semicircular screening plate 9 can be reset with the assistance of the return spring 14, so that the screening effect can be better.

[0030] Furthermore, two symmetrical light sludge circular holes 6 are provided on the side wall of the sludge screen body 3, and four heavy sludge circular holes 7 are provided on the bottom of the sludge screen body 3 in a circumferential distribution. Each light sludge circular hole 6 and heavy sludge circular hole 7 respectively penetrates the protective shell 2 and the placement box 1, and each light sludge circular hole 6 and heavy sludge circular hole 7 is respectively installed with a light sludge discharge pipe 5 and a heavy sludge discharge pipe 4, each light sludge discharge pipe 5 is connected to each other, and the other end penetrates the placement box 1, and each heavy sludge discharge pipe 4 is connected to each other, and the other end penetrates the placement box 1. In this arrangement, when the lighter and looser sludge is screened separately, it can pass through the first semicircular screening plate 8 and the second semicircular screening plate 9 and fall into the storage box 10, and be discharged to the sludge concentration tank through the light sludge discharge pipe 5. When the activated sludge with a larger specific gravity and a denser density falls to the bottom of the sludge screener body 3, it will be refluxed and stored through the heavy sludge discharge pipe 4; therefore, the sludge after screening has a greater specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation property; at the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

[0031] The implementation principle of a heavy sludge screening device of the present embodiment is as follows: first, when screening sludge, by placing the sludge in the sludge screening device body 3, when the sludge falls into the first semicircular screening plate 8 and the second semicircular screening plate 9, the first semicircular screening plate 8 and the second semicircular screening plate 9 will be able to flip over under the action of gravity, and at this time it can squeeze the baffle 11 to move downward, and the baffle 11 can squeeze the circular plug-in rod 12 to move downward, so the squeezing reset spring 14 can move downward, and when the sludge falls once, the first semicircular screening plate 8 and the second semicircular screening plate 9 can be reset with the assistance of the reset spring 14, so that the screening effect can be better; therefore, the first semicircular screening plate 8 and the second semicircular screening plate 9 arranged in the sludge screening device body 3 can screen the activated sludge with a larger specific gravity and a denser density and the sludge with a lighter specific gravity and a looser specific gravity respectively, so the lighter specific gravity, The looser sludge is screened separately and can pass through the first semicircular screening plate 8 and the second semicircular screening plate 9 to fall into the storage box 10, and is discharged to the sludge concentration tank through the light sludge discharge pipe 5. At the same time, the activated sludge with a larger specific gravity and a denser density will accumulate on the first semicircular screening plate 8 and the second semicircular screening plate 9. When it accumulates to a certain extent, the first semicircular screening plate 8 and the second semicircular screening plate 9 will be able to be turned over with the assistance of the first rotating rod 19 and the second rotating rod 18 respectively. Therefore, the activated sludge with a larger specific gravity and a denser density will fall to the bottom of the sludge screener body 3, and will be refluxed and stored through the heavy sludge discharge pipe 4; therefore, the sludge after screening has an increased specific gravity and a higher sedimentation rate, which can effectively improve the sludge sedimentation property; at the same time, the heavy sludge contains polyphosphate bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying heterotrophic bacteria and even anaerobic ammonia oxidizing bacteria, which will greatly enhance the biological denitrification and phosphorus removal capabilities.

Claims

1. A heavy sludge screening device, comprising a storage box (1) and a sludge screening device body (3), characterized in that: A protective shell (2) is installed above the placement box (1), a sludge screen body (3) is installed in the inner cavity of the protective shell (2), a circular mounting plate (15) is integrally installed on the outer wall of the sludge screen body (3), the circular mounting plate (15) is fixedly connected to the protective shell (2), a first semicircular screening plate (8) and a second semicircular screening plate (9) are arranged in the inner cavity of the sludge screen body (3), and rectangular notches (16) are provided on the opposite side walls of the sludge screen body (3), and the two rectangular notches (16) are mutually Symmetrically, a rotating mechanism is provided in the inner cavity of the two rectangular notches (16), and the rotating mechanism is fixedly passed through the first semicircular screening plate (8) and the second semicircular screening plate (9), respectively, and the rotating mechanism is used to drive the first semicircular screening plate (8) and the second semicircular screening plate (9) to rotate, and a storage box (10) is fixedly installed at the bottom of the first semicircular screening plate (8) and the second semicircular screening plate (9), and the two storage boxes (10) are symmetrical to each other, and a moving mechanism is provided at the bottom of the first semicircular screening plate (8) and the second semicircular screening plate (9).

2. A heavy sludge screening device according to claim 1, characterized in that: The rotating mechanism comprises a first rotating rod (19), both ends of which are provided with bearings (17), the two bearings (17) are respectively mounted on the inner walls of two rectangular notches (16), and the first rotating rod (19) is fixedly passed through the first semicircular screening plate (8).

3. A heavy sludge screening device according to claim 1, characterized in that: The rotating mechanism also includes a second rotating rod (18), both ends of which are provided with bearings (17), the two bearings (17) are respectively mounted on the inner walls of the two rectangular notches (16), and the second rotating rod (18) is fixedly passed through the second semicircular screening plate (9).

4. A heavy sludge screening device according to claim 1, characterized in that: The moving mechanism comprises a circular plug-in cylinder (13), the circular plug-in cylinder (13) is fixedly mounted at the bottom of the inner cavity of the sludge screen body (3), a circular plug-in rod (12) is plugged into the inner cavity of the circular plug-in cylinder (13), a baffle (11) is fixedly mounted at one end of the circular plug-in rod (12) away from the circular plug-in cylinder (13), and the end of the baffle (11) away from the circular plug-in rod (12) is fittedly arranged on a side wall opposite to the bottom of the first semicircular screening plate (8) and the second semicircular screening plate (9).

5. A heavy sludge screening device according to claim 4, characterized in that: A return spring (14) is fixedly mounted on one end of the circular plug rod (12) in the inner cavity of the circular plug cylinder (13), and the other end of the return spring (14) is fixedly connected to the bottom of the inner cavity of the circular plug cylinder (13).

6. A heavy sludge screening device according to claim 1, characterized in that: The side wall of the sludge screen body (3) is provided with two symmetrical light sludge circular holes (6), and the bottom of the sludge screen body (3) is provided with four heavy sludge circular holes (7) arranged in a circumferential distribution. Each of the light sludge circular holes (6) and the heavy sludge circular holes (7) respectively penetrates the protective shell (2) and the placement box (1). Each of the light sludge circular holes (6) and the heavy sludge circular holes (7) is respectively installed with a light sludge discharge pipe (5) and a heavy sludge discharge pipe (4). Each of the light sludge discharge pipes (5) is connected to each other, and the other end thereof penetrates the placement box (1). Each of the heavy sludge discharge pipes (4) is connected to each other, and the other end thereof penetrates the placement box (1).

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