Digester sludge removal system

Abstract

The present invention discloses a digester sludge discharge system, comprising an oval digester and a sewage discharge and energy dissipation device installed at the lower part of the oval digester. The sewage discharge and energy dissipation device is characterized in that the sewage discharge and energy dissipation device comprises a fixed pipe, a connecting pipe and the energy dissipation device, the fixed pipe is horizontally installed on the lower outer wall of the oval digester, the fixed pipe is connected to the inner cavity of the oval digester, one end of the connecting pipe is connected to the fixed pipe through a flange, and the other end of the connecting pipe is connected to the energy dissipation device through a flange. A feed pipe is horizontally installed on the upper part of the energy dissipation device, and a discharge pipe is vertically installed on the lower part of the energy dissipation device. The digester sludge discharge system of the present invention can drive the rotating drum to rotate under the impact of sewage or sludge, and the sewage or sludge is discharged from the discharge pipe after the impact force is offset. When the rotating speed of the rotating drum is too fast, the protruding end of the deceleration rod contacts the inner ring of the deceleration ring and generates friction to reduce the rotating speed, thereby reducing the safety threat to the operator and preventing pollution of the surrounding environment.

Description

Technical Field

[0001] The invention relates to sewage treatment, and in particular to a digester sludge discharge system. Background Art

[0002] In the process of sewage treatment, anaerobic digestion of sludge refers to the process in which facultative bacteria and anaerobic bacteria decompose the biodegradable organic matter in the sludge into carbon dioxide, methane and water under anaerobic conditions to stabilize the sludge. It is one of the commonly used means of sludge reduction and stabilization. In the digestion process, due to the large volume of the digester, the pressure at the bottom is very huge during the later sewage discharge process. When the sewage valve at the bottom is just opened, the sewage will be sprayed out under the pressure at the moment the valve is opened, posing a danger to the surrounding operators and polluting the surrounding environment. Secondary cleaning is required, which is time-consuming and labor-intensive.

[0003] The disadvantage of the prior art is that, in the face of high internal pressure, sludge will erupt when the valve is opened, posing a threat to the safety of operators and polluting the surrounding environment. Summary of the invention

[0004] In view of this, the present invention provides a digester sludge discharge system.

[0005] The technical solution is as follows:

[0006] A digester sludge discharge system comprises an oval digester and a sewage discharge and energy dissipation device installed at the lower part of the oval digester, characterized in that:

[0007] The sewage discharge and energy dissipation device comprises a fixed pipe, a connecting pipe and an energy dissipation device, wherein the fixed pipe is horizontally installed on the lower outer wall of the egg-shaped digestion tank, the fixed pipe is connected to the inner cavity of the egg-shaped digestion tank, one end of the connecting pipe is connected to the fixed pipe through a flange, and the other end of the connecting pipe is connected to the energy dissipation device through a flange;

[0008] The energy dissipation device is a hollow structure, a feed pipe is horizontally installed on the upper part of the energy dissipation device, and a discharge pipe is vertically installed on the lower part of the energy dissipation device, and the feed pipe and the discharge pipe are both connected to the inner cavity of the energy dissipation device.

[0009] The effect of adopting the above scheme is as follows: when sewage or sludge enters the outer shell, the energy dissipation plate drives the rotating drum to rotate under the impact of the sewage or sludge, thereby offsetting the impact force of the sewage or sludge. When the rotating drum rotates too fast, the deceleration member is subjected to the centrifugal force and contacts the deceleration ring, thereby increasing friction, reducing the rotation speed, preventing the sewage or sludge from erupting during discharge, and protecting the safety of the operator and the surrounding environment.

[0010] A valve is provided in the middle of the connecting pipe, and the valve controls the switch of the connecting pipe.

[0011] A sewage trough is also obliquely provided below the discharge pipe, and the lower end of the discharge pipe extends into the sewage trough.

[0012] The energy dissipation device comprises an outer shell, a rotating device and an energy dissipator, the outer shell is a hollow cylindrical shape, the center line of the outer shell is arranged horizontally, the rotating device is installed on the outer shell, and the energy dissipator is installed on the outer shell and the rotating device at the same time;

[0013] The rotating device comprises a rotating cylinder, the center line of the rotating cylinder coincides with the center line of the outer shell, two ends of the rotating cylinder extend out of the outer shell respectively, an inlet is passed through the upper part of the outer shell, and an outlet is passed through the lower part of the outer shell, the inlet is connected to the feed pipe, and the outlet is connected to the discharge pipe;

[0014] The energy dissipator includes a reduction ring and a plurality of reduction parts, all of which are installed on any protruding end of the rotating cylinder, the reduction ring is arranged around the rotating cylinder, all of which are installed on the outer wall of the rotating cylinder, and all of which are located between the rotating cylinder and the reduction ring.

[0015] The rotating device further comprises two annular baffles and a plurality of energy dissipation plates, wherein the annular baffles and the energy dissipation plates are both located in the outer shell;

[0016] All the energy dissipation plates are distributed in a divergent manner with the axis of the rotating cylinder as the center, all the energy dissipation plates are parallel to the center line of the rotating cylinder, and all the energy dissipation plates are equidistantly installed on the outer wall of the rotating cylinder;

[0017] The two annular baffles are respectively fixedly sleeved on the rotating cylinder, all the energy dissipation plates are located between the two annular baffles, and all the energy dissipation plates are respectively fixedly connected to the two annular baffles;

[0018] The energy dissipation plate divides the inner cavity of the outer shell into a plurality of buffer areas.

[0019] A waterproof ring is also coated along the outer ring edge of the annular baffle, and the waterproof ring is in sliding contact with the inner wall of the outer shell.

[0020] The outer shell comprises a protective tube, a cover plate and a positioning plate, the protective tube is cylindrical, the cover plate and the positioning plate are respectively buckled at two ends of the protective tube, and the positioning plate is fixedly connected to the protective tube;

[0021] The cover plate includes a mounting plate and a connecting tube, the outer ring edge of the mounting plate is fixedly connected to the end edge of any end of the connecting tube, the inner wall of the connecting tube is threadedly connected to the protective tube, the center of the mounting plate and the positioning plate are penetrated by a rotating hole, and the two ends of the rotating tube extend out from the corresponding rotating holes respectively;

[0022] A waterproof bearing is arranged in each of the rotating holes, the outer ring of the waterproof bearing is fixedly connected to the inner wall of the rotating hole, and the inner wall of the waterproof bearing is fixedly connected to the outer wall of the rotating cylinder.

[0023] The deceleration component includes a deceleration cylinder and a deceleration rod. All the deceleration cylinders are distributed in a divergent manner with the rotating cylinder as the center. All the deceleration cylinders are equidistantly arranged. The inner end of the deceleration cylinder is fixedly connected to the outer wall of the rotating cylinder. The deceleration rod is movably inserted in the corresponding deceleration cylinder. The free end of the deceleration rod extends out of the outer end of the deceleration cylinder, and the extended end of the deceleration rod is close to the deceleration ring.

[0024] A return spring is also provided in the reduction cylinder. The return spring is located between the reduction rod and the rotating cylinder. One end of the return spring is fixedly connected to the rotating cylinder, and the other end of the return spring is fixedly connected to the inner end of the reduction rod.

[0025] The inner ring of the deceleration ring is also provided with a plurality of convex points, and all the convex points are evenly arranged along the inner ring of the deceleration ring;

[0026] The convex point is hemispherical, and the convex point is buckled on the inner wall of the deceleration ring. The protruding end of the deceleration rod is also provided with a rubber head;

[0027] The outer wall of the rotating cylinder is also provided with a plurality of fixed blind holes, all of which are distributed in a divergent manner with the axis of the rotating cylinder as the center, and the fixed blind holes correspond to the reduction cylinders one by one, the reduction cylinders are inserted into the corresponding fixed blind holes, and the reduction cylinders are threadedly connected with the corresponding fixed blind holes.

[0028] Beneficial effects: When sewage or sludge enters the outer shell from the feed pipe, the energy dissipation plate drives the rotating drum to rotate under the impact of the sewage or sludge, and the sewage or sludge is discharged from the discharge pipe after the impact force is offset. When the rotating drum rotates too fast, the deceleration rod is extended out of the deceleration drum by the centrifugal force, and the extended end of the deceleration rod contacts the inner ring of the deceleration ring and generates friction to reduce the rotating speed. The device effectively reduces the safety threat to the operator and prevents pollution of the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2It is a structural schematic diagram of the sewage discharge and energy dissipation device 11;

[0031] Figure 3 for Figure 2 AA section view;

[0032] Figure 4 It is a schematic diagram of the cross-sectional structure of the speed reducer. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments and drawings.

[0034] like Figure 1 and Figure 4 As shown, a digester sludge discharge system includes an egg-shaped digester 10 and a sewage discharge and energy dissipation device 11 installed at the lower part of the egg-shaped digester 10, characterized in that:

[0035] The sewage discharge and energy dissipation device 11 includes a fixed pipe, a connecting pipe and an energy dissipation device, wherein the fixed pipe is horizontally installed on the lower outer wall of the egg-shaped digestion tank 10, the fixed pipe is connected to the inner cavity of the egg-shaped digestion tank 10, one end of the connecting pipe is connected to the fixed pipe through a flange, and the other end of the connecting pipe is connected to the energy dissipation device through a flange;

[0036] The energy dissipation device is a hollow structure, a feed pipe 1a is horizontally installed on the upper part of the energy dissipation device, and a discharge pipe 1b is vertically installed on the lower part of the energy dissipation device. The feed pipe 1a and the discharge pipe 1b are both connected to the inner cavity of the energy dissipation device.

[0037] in:

[0038] A valve is provided in the middle of the connecting pipe, and the valve controls the switch of the connecting pipe.

[0039] A sewage trough 12 is obliquely provided below the discharge pipe 1 b , and the lower end of the discharge pipe 1 b extends into the sewage trough 12 .

[0040] The energy dissipation device comprises an outer shell, a rotating device and an energy dissipator, the outer shell is a hollow cylindrical shape, the center line of the outer shell is arranged horizontally, the rotating device is installed on the outer shell, and the energy dissipator is installed on the outer shell and the rotating device at the same time;

[0041] The rotating device comprises a rotating cylinder 2, the center line of the rotating cylinder 2 coincides with the center line of the outer shell, both ends of the rotating cylinder 2 extend out of the outer shell respectively, an inlet is passed through the upper part of the outer shell, and an outlet is passed through the lower part of the outer shell, the inlet is connected to the feed pipe 1a, and the outlet is connected to the discharge pipe 1b;

[0042] The energy dissipator includes a reduction ring 3 and a plurality of reduction parts, all of which are installed on any protruding end of the rotating cylinder 2. The reduction ring 3 is arranged around the rotating cylinder 2, all of which are installed on the outer wall of the rotating cylinder 2, and all of which are located between the rotating cylinder 2 and the reduction ring 3.

[0043] The rotating device further comprises two annular baffles 2c and a plurality of energy dissipation plates 2b, wherein the annular baffles 2c and the energy dissipation plates 2b are both located in the outer shell;

[0044] All the energy dissipation plates 2b are distributed in a divergent manner with the axis of the rotating cylinder 2 as the center, all the energy dissipation plates 2b are parallel to the center line of the rotating cylinder 2, and all the energy dissipation plates 2b are equidistantly installed on the outer wall of the rotating cylinder 2;

[0045] The two annular baffles 2c are respectively fixedly sleeved on the rotating cylinder 2, and all the energy dissipation plates 2b are located between the two annular baffles 2c, and all the energy dissipation plates 2b are respectively fixedly connected to the two annular baffles 2c;

[0046] The energy dissipation plate 2b divides the inner cavity of the outer shell into a plurality of buffer areas.

[0047] A waterproof ring 8 is also coated along the outer edge of the annular baffle 2c, and the waterproof ring 8 is in sliding contact with the inner wall of the outer shell.

[0048] The outer shell includes a protective tube 1c, a cover plate and a positioning plate 1e. The protective tube 1c is cylindrical. The cover plate and the positioning plate 1e are respectively buckled at two ends of the protective tube 1c. The positioning plate 1e is fixedly connected to the protective tube 1c.

[0049] The cover plate includes a mounting plate 1 and a connecting tube 1d, the outer ring edge of the mounting plate 1 is fixedly connected to the end edge of any end of the connecting tube 1d, the inner wall of the connecting tube 1d is threadedly connected to the protective tube 1c, the center of the mounting plate 1 and the positioning plate 1e are penetrated by a rotating hole, and the two ends of the rotating tube 2 extend out from the corresponding rotating holes respectively;

[0050] A waterproof bearing 2a is provided in each of the rotating holes. The outer ring of the waterproof bearing 2a is fixedly connected to the inner wall of the rotating hole, and the inner wall of the waterproof bearing 2a is fixedly connected to the outer wall of the rotating cylinder 2.

[0051] The deceleration component includes a deceleration cylinder 4 and a deceleration rod 5. All the deceleration cylinders 4 are distributed in a divergent shape with the rotating cylinder 2 as the center. All the deceleration cylinders 4 are equidistantly arranged. The inner ends of the deceleration cylinders 4 are fixedly connected to the outer wall of the rotating cylinder 2. The deceleration rods 5 are movably inserted in the corresponding deceleration cylinders 4. The free ends of the deceleration rods 5 extend out of the outer ends of the deceleration cylinders 4. The extended ends of the deceleration rods 5 are close to the deceleration ring 3.

[0052] A return spring 6 is also provided in the reduction cylinder 4 , and the return spring 6 is located between the reduction rod 5 and the rotating cylinder 2 , one end of the return spring 6 is fixedly connected to the rotating cylinder 2 , and the other end of the return spring 6 is fixedly connected to the inner end of the reduction rod 5 .

[0053] The inner ring of the deceleration ring 3 is also provided with a plurality of convex points, and all the convex points are evenly arranged along the inner ring of the deceleration ring 3;

[0054] The convex point is hemispherical, and the convex point is buckled on the inner wall of the deceleration ring 3. The protruding end of the deceleration rod 5 is also provided with a rubber head 7;

[0055] The outer wall of the rotating cylinder 2 is also provided with a plurality of fixed blind holes, all of which are distributed in a divergent manner with the axis of the rotating cylinder 2 as the center, and the fixed blind holes correspond one-to-one to the reduction cylinder 4, the reduction cylinder 4 is inserted into the corresponding fixed blind holes, and the reduction cylinder 4 is threadedly connected with the corresponding fixed blind holes.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A digester sludge discharge system, comprising an oval digester (10), and a sewage discharge and energy dissipation device (11) installed at the lower part of the oval digester (10), characterized in that: The sewage discharge and energy dissipation device (11) comprises a fixed pipe, a connecting pipe and an energy dissipation device, wherein the fixed pipe is horizontally installed on the lower outer wall of the egg-shaped digestion tank (10), the fixed pipe is connected to the inner cavity of the egg-shaped digestion tank (10), one end of the connecting pipe is connected to the fixed pipe via a flange, and the other end of the connecting pipe is connected to the energy dissipation device via a flange; The energy dissipation device is a hollow structure, a feed pipe (1a) is horizontally installed on the upper part of the energy dissipation device, and a discharge pipe (1b) is vertically installed on the lower part of the energy dissipation device, and the feed pipe (1a) and the discharge pipe (1b) are both connected to the inner cavity of the energy dissipation device; A valve is provided in the middle of the connecting pipe, and the valve controls the switch of the connecting pipe; A sewage trough (12) is also obliquely provided below the discharge pipe (1b), and the lower end of the discharge pipe (1b) extends into the sewage trough (12); The energy dissipation device comprises an outer shell, a rotating device and an energy dissipator, the outer shell is a hollow cylindrical shape, the center line of the outer shell is arranged horizontally, the rotating device is installed on the outer shell, and the energy dissipator is installed on the outer shell and the rotating device at the same time; The rotating device comprises a rotating cylinder (2), the center line of the rotating cylinder (2) coincides with the center line of the outer shell, the two ends of the rotating cylinder (2) extend out of the outer shell respectively, an inlet is passed through the upper part of the outer shell, and an outlet is passed through the lower part of the outer shell, the inlet is connected to the feed pipe (1a), and the outlet is connected to the discharge pipe (1b); The energy dissipator comprises a deceleration ring (3) and a plurality of deceleration components, all of the deceleration components are mounted on any protruding end of the rotating cylinder (2), the deceleration ring (3) is arranged around the rotating cylinder (2), all of the deceleration components are mounted on the outer wall of the rotating cylinder (2), and all of the deceleration components are located between the rotating cylinder (2) and the deceleration ring (3); The rotating device further comprises two annular baffles (2c) and a plurality of energy dissipation plates (2b), wherein the annular baffles (2c) and the energy dissipation plates (2b) are both located inside the outer shell; All the energy dissipation plates (2b) are distributed in a divergent manner with the axis of the rotating cylinder (2) as the center, all the energy dissipation plates (2b) are parallel to the center line of the rotating cylinder (2), and all the energy dissipation plates (2b) are installed at equal distances on the outer wall of the rotating cylinder (2); The two annular baffles (2c) are respectively fixedly sleeved on the rotating cylinder (2), all the energy dissipation plates (2b) are located between the two annular baffles (2c), and all the energy dissipation plates (2b) are respectively fixedly connected to the two annular baffles (2c); The energy dissipation plate (2b) divides the inner cavity of the outer shell into a plurality of buffer areas; A waterproof ring (8) is also coated along the outer edge of the annular baffle (2c), and the waterproof ring (8) is in sliding contact with the inner wall of the outer shell; The outer shell comprises a protective tube (1c), a cover plate and a positioning plate (1e); the protective tube (1c) is cylindrical; the cover plate and the positioning plate (1e) are respectively buckled on two ends of the protective tube (1c); and the positioning plate (1e) is fixedly connected to the protective tube (1c); The cover plate comprises a mounting plate (1) and a connecting tube (1d), the outer ring edge of the mounting plate (1) is fixedly connected to the end edge of any one end of the connecting tube (1d), the inner wall of the connecting tube (1d) is threadedly connected to the protective tube (1c), the center of the mounting plate (1) and the positioning plate (1e) are penetrated by a rotating hole, and the two ends of the rotating tube (2) respectively extend out from the corresponding rotating holes; A waterproof bearing (2a) is provided in each of the rotating holes, the outer ring of the waterproof bearing (2a) is fixedly connected to the inner wall of the rotating hole, and the inner wall of the waterproof bearing (2a) is fixedly connected to the outer wall of the rotating cylinder (2); The deceleration component comprises a deceleration cylinder (4) and a deceleration rod (5), all the deceleration cylinders (4) are distributed in a divergent manner with the rotating cylinder (2) as the center, all the deceleration cylinders (4) are arranged at equal distances, the inner ends of the deceleration cylinders (4) are fixedly connected to the outer wall of the rotating cylinder (2), the deceleration rods (5) are movably inserted in the corresponding deceleration cylinders (4), the free ends of the deceleration rods (5) extend out of the outer ends of the deceleration cylinders (4), and the extended ends of the deceleration rods (5) are close to the deceleration ring (3); A return spring (6) is further provided in the deceleration cylinder (4), and the return spring (6) is located between the deceleration rod (5) and the rotating cylinder (2), one end of the return spring (6) is fixedly connected to the rotating cylinder (2), and the other end of the return spring (6) is fixedly connected to the inner end of the deceleration rod (5); The inner ring of the deceleration ring (3) is also provided with a plurality of convex points, and all of the convex points are evenly arranged along the inner ring of the deceleration ring (3); The convex point is hemispherical and is buckled onto the inner wall of the deceleration ring (3). The protruding end of the deceleration rod (5) is also provided with a rubber head (7). The outer wall of the rotating cylinder (2) is further provided with a plurality of fixed blind holes, all of which are distributed in a divergent manner with the axis of the rotating cylinder (2) as the center, the fixed blind holes corresponding to the reduction cylinders (4) one by one, the reduction cylinders (4) being inserted into the corresponding fixed blind holes, and the reduction cylinders (4) being threadedly connected to the corresponding fixed blind holes.

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