A cyclone distributor for an anaerobic reactor

Abstract

This invention discloses a vortex water distributor for an anaerobic reactor, including a fixed pipe vertically fixed to the bottom of the reactor. This invention employs a multi-layered reverse vortex spray structure. Through the interference of water flows in different directions, it eliminates the concentration gradient between the reactor edge and center caused by the unidirectional flow of traditional water distributors, thus expanding the contact area between sludge and wastewater and significantly improving the effective utilization rate of the reaction volume. Through a multi-stage differential vortex design, a three-dimensional interlaced turbulent field is formed without the need for additional mechanical stirring devices, breaking the dead zone formed by traditional single-layer sprays and greatly improving the mixing intensity within the reactor. Combined with a gradually narrowing flow channel and a large-angle spray nozzle structure, it reduces the risk of fibrous impurities remaining in solid wastewater. Simultaneously, the synergistic effect of the shield-like protrusions on the surface prevents sludge accumulation around the spray nozzles, reducing the frequency of manual cleaning.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic reactor technology, and in particular to a vortex water distributor for an anaerobic reactor. Background Technology

[0002] Anaerobic biological treatment technology decomposes organic matter under anaerobic conditions using anaerobic bacteria, achieving wastewater purification and biogas recovery. It boasts advantages such as low energy consumption and low sludge production, and is widely used in the treatment of high-concentration organic wastewater in industries such as food, pharmaceuticals, and aquaculture. In this process, the water distributor, as a core component, performs the dual functions of uniform water distribution and hydraulic agitation. Its performance directly affects the sludge-wastewater contact efficiency and methane yield within the reactor.

[0003] However, existing water distributor technology has the following key defects: Insufficient water distribution uniformity: Due to uneven water flow distribution, traditional radial water distribution pipes cause a concentration gradient between the reactor edge and the center, resulting in a loss of effective reaction volume; Low utilization rate of stirring kinetic energy: The unidirectional vortex generated by single-layer fixed nozzles is prone to forming hydraulic dead zones, requiring additional mechanical stirring devices, which increases energy consumption.

[0004] Therefore, it is necessary to optimize and improve the structure of the cyclone distributor in the anaerobic reactor to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cyclone water distributor for an anaerobic reactor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a cyclone water distributor for an anaerobic reactor, comprising a fixed pipe vertically fixed to the bottom of the reactor, a connecting pipe connected to the top of the fixed pipe, three sets of vertically distributed through cavities arranged axially inside the connecting pipe, three sets of water inlet pipes arranged inside the fixed pipe, the upper ends of the three sets of water inlet pipes respectively communicating with one set of through cavities, three sets of vertically distributed rotating sleeves arranged axially on the outer wall of the connecting pipe, a set of spray rings fixedly connected to the outer wall of each set of rotating sleeves by four sets of support pipes, the three sets of spray rings being located on the same horizontal plane, a plurality of first connecting holes arranged on the outer wall of the through cavity, a plurality of second connecting holes arranged on the outer wall of the rotating sleeve, a water passage channel communicating with the second connecting holes and the interior of the spray rings arranged inside the support pipe, a shield-like protrusion evenly distributed on the upper surface of the spray rings, and an inclined through spray hole arranged below each set of shield-like protrusions.

[0007] As a further description of the above technical solution:

[0008] The spray hole in the middle layer of the three spray rings is tilted in the opposite direction to the spray hole in the outer and inner layers.

[0009] As a further description of the above technical solution:

[0010] The water passage is a tapered flow channel, the inlet diameter of the water passage is the same as the diameter of the second connecting hole, and the outlet diameter of the water passage is 0.65-0.75 times the inlet diameter.

[0011] As a further description of the above technical solution:

[0012] The shield-like protrusions have a height of 0.8-1.5 mm, a front end inclination angle of 22°±2° and a rear end inclination angle of 45°±3°, and the distance between two adjacent sets of shield-like protrusions is 2-3 times the protrusion height.

[0013] As a further description of the above technical solution:

[0014] The angle between the axis of the water spray hole and the horizontal plane is 32°-38°, the length-to-diameter ratio of the water spray hole channel is L / D=4-6, the water spray hole opening is provided with a chamfer structure, the chamfer angle of the water spray hole opening is 60°±5°, and the chamfer depth of the water spray hole opening is 0.2-0.3mm.

[0015] As a further description of the above technical solution:

[0016] The rotating sleeve is rotatably connected to the outer wall of the connecting pipe by two sets of bearings, namely an upper angular contact bearing and a lower deep groove ball bearing.

[0017] As a further description of the above technical solution:

[0018] The rotating sleeve and the connecting pipe are sealed by two sets of double-lip sealing rings.

[0019] This utility model has the following beneficial effects:

[0020] 1. Compared with existing technologies, the swirl distributor of this anaerobic reactor adopts a multi-layer reverse swirl spray structure. Through the mutual interference of water flow in different directions, the concentration gradient between the reactor edge and the center area caused by the unidirectional flow of traditional distributors is eliminated, thereby increasing the contact area between sludge and sewage and significantly improving the effective utilization rate of reaction volume.

[0021] 2. Compared with existing technologies, the swirling water distributor of this anaerobic reactor, through a multi-level differential swirling design, forms a three-dimensional interlaced turbulent field without the need for additional mechanical stirring devices, breaking the dead zone formed by traditional single-layer water spraying and significantly improving the mixing intensity within the reactor.

[0022] 3. Compared with existing technologies, the cyclone distributor of this anaerobic reactor, combined with the gradually narrowing flow channel and the large-angle nozzle structure, reduces the risk of fibrous impurities in solid wastewater being retained. At the same time, through the synergistic effect of the shield-like protrusions on the surface, it avoids sludge accumulation around the nozzles and reduces the frequency of manual cleaning. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the cyclone water distributor for an anaerobic reactor proposed in this utility model.

[0024] Figure 2 This is a partial cross-sectional view of the fixed pipe, connecting pipe, and rotating sleeve connection structure of the cyclone water distributor of the anaerobic reactor proposed in this utility model.

[0025] Figure 3 This is a top view schematic diagram of the spray ring of the swirl water distributor of an anaerobic reactor proposed in this utility model;

[0026] Figure 4 This is a partial cross-sectional schematic diagram of the spray ring of the swirl water distributor of an anaerobic reactor proposed in this utility model.

[0027] Legend:

[0028] 1. Fixed pipe; 2. Connecting pipe; 3. Inlet pipe; 4. Rotary sleeve; 5. Support pipe; 6. Spray ring; 7. Through cavity; 8. First connecting hole; 9. Second connecting hole; 10. Water passage; 11. Shield-like protrusion; 12. Spray hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figures 1 to 4 The present invention provides a cyclone water distributor for an anaerobic reactor: including a fixed pipe 1 vertically fixed to the bottom of the reactor, a connecting pipe 2 connected to the top of the fixed pipe 1, three sets of vertically distributed through cavities 7 arranged axially inside the connecting pipe 2, and three sets of water inlet pipes 3 arranged inside the fixed pipe 1, the upper ends of the three sets of water inlet pipes 3 respectively communicating with one set of through cavities 7.

[0031] The distribution of water flow at different heights is achieved through three sets of independent passage cavities 7, avoiding mutual interference between multiple layers of water flow and ensuring balanced water supply pressure in each layer of spray ring 6;

[0032] In order to provide stable rotational support and sealing protection, the outer wall of the connecting pipe 2 is provided with three sets of rotating sleeves 4 distributed vertically along the axis. The rotating sleeves 4 are rotatably connected to the outer wall of the connecting pipe 2 through two sets of bearings, namely an upper angular contact bearing and a lower deep groove ball bearing. The rotating sleeves 4 and the connecting pipe 2 are sealed by two sets of double lip seals.

[0033] Angular contact bearings bear axial loads, while deep groove ball bearings bear radial loads. Together with double lip seals, they form a double protection to prevent sewage from seeping into the bearings and causing jamming, thus extending the service life of rotating parts.

[0034] In order to construct a multi-layer swirling jet structure, each set of rotating sleeves 4 has a set of water spray rings 6 fixedly connected to the outer wall of each set of supporting pipes 5, and the three sets of water spray rings 6 are located on the same horizontal plane.

[0035] The superimposed swirling field is formed by three sets of coplanar water spray rings 6, which expands the hydraulic coverage area and eliminates the stirring blind zone of traditional single-layer water distribution.

[0036] To optimize the water flow acceleration and anti-clogging design, the outer wall of the cavity 7 is provided with multiple first connection holes 8, the outer wall of the rotating sleeve 4 is provided with multiple second connection holes 9, and the support pipe 5 is provided with a water passage 10 that connects the second connection holes 9 and the inside of the spray ring 6. The water passage 10 is a gradually narrowing flow channel. The inlet diameter of the water passage 10 is the same as the diameter of the second connection hole 9, and the outlet diameter of the water passage 10 is 0.65 times the inlet diameter.

[0037] The gradually narrowing flow channel accelerates the water flow and increases the outlet kinetic energy, while reducing the outlet cross-sectional area reduces the risk of fiber impurity retention and lowers the probability of internal blockage in the support pipe 5.

[0038] To enhance surface turbulence and prevent material buildup, the upper surface of the water spray ring 6 is provided with circumferentially distributed shield-scale protrusions 11. The height of the shield-scale protrusions 11 is 0.8 mm, the front end inclination angle of the shield-scale protrusions 11 is 22° and the rear end inclination angle is 45°. The distance between two adjacent shield-scale protrusions 11 in the multiple sets of shield-scale protrusions 11 is 3 times the height of the protrusion.

[0039] The angle and staggered arrangement of the shield-like protrusions 11 can guide the water flow to generate local vortices, flushing the sludge on the surface of the spray ring 6 and avoiding excessive biofilm adhesion that could cause nozzle blockage.

[0040] To generate a differential reverse swirling flow field, each set of shield-like protrusions 11 is provided with an inclined through-hole 12. The inclination direction of the spray hole 12 of the middle spray ring 6 in the three sets of spray rings 6 is opposite to that of the spray hole 12 of the outer and inner spray rings 6. The angle between the axis of the spray hole 12 and the horizontal plane is 38°. The length-to-diameter ratio of the spray hole 12 channel is L / D = 6. The orifice of the spray hole 12 is provided with a chamfer structure. The chamfer angle of the orifice of the spray hole 12 is 60° and the chamfer depth of the orifice of the spray hole 12 is 0.2mm.

[0041] The reverse jetting of the middle spray hole 12 forms an opposing swirling flow with the water jetting from the inner and outer spray holes 12, which enhances the turbulence intensity in the middle of the reactor; the large tilt angle and chamfer structure reduce the eddy current at the edge of the spray hole and reduce the scaling rate at the orifice.

[0042] Working principle: Three sets of independent passage cavities 7 achieve water flow distribution at different heights, avoiding mutual interference between multiple layers of water flow and ensuring balanced water supply pressure in each layer of spray rings 6; angular contact bearings bear axial loads, and deep groove ball bearings bear radial loads, forming double protection with double lip seals to prevent sewage from seeping into the bearings and causing jamming, thus extending the service life of rotating parts; the three sets of coplanarly distributed spray rings 6 form a superimposed swirling field, expanding the hydraulic coverage area and eliminating the stirring blind zone of traditional single-layer water distribution; the gradually narrowing channel accelerates the water flow and increases the outlet kinetic energy, while reducing the outlet cross-sectional area to reduce the risk of fiber impurity retention and lower the probability of internal blockage in the support pipe 5; the angle and staggered layout of the shield-like protrusions 11 can guide the water flow to generate local vortices, flushing the sludge on the surface of the spray rings 6 and preventing excessive biofilm adhesion that could cause nozzle blockage; the reverse jet of the middle layer spray holes 12 forms a counter-current swirling flow with the water jets from the inner and outer spray holes 12, increasing the turbulence intensity in the middle of the reactor; the large angle and chamfered structure reduce vortices at the nozzle edges and lower the orifice scaling rate.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrocyclone water distributor for an anaerobic reactor, characterized by: The reactor includes a fixed pipe (1) vertically fixed to the bottom of the reactor. A connecting pipe (2) is connected to the top of the fixed pipe (1). The connecting pipe (2) has three sets of vertically distributed through-cavities (7) arranged axially inside. Three sets of water inlet pipes (3) are installed inside the fixed pipe (1). The upper ends of the three sets of water inlet pipes (3) are respectively connected to one set of through-cavities (7). Three sets of vertically distributed rotating sleeves (4) are arranged axially on the outer wall of the connecting pipe (2). The outer wall of each rotating sleeve (4) is fixedly connected to a support pipe (5) by four sets of support pipes (5). The three sets of water spray rings (6) are located on the same horizontal plane. The outer wall of the cavity (7) is provided with a plurality of first connecting holes (8). The outer wall of the rotating sleeve (4) is provided with a plurality of second connecting holes (9). The support tube (5) is provided with a water passage (10) that passes through the second connecting holes (9) and the interior of the water spray ring (6). The upper surface of the water spray ring (6) is provided with shield-scale protrusions (11) evenly distributed around the circumference. Each set of shield-scale protrusions (11) is provided with an inclined through-hole (12) below it.

2. A hydrocyclone water distributor for an anaerobic reactor according to claim 1, characterized in that: The tilt direction of the spray holes (12) of the middle layer spray ring (6) in the three sets of spray rings (6) is opposite to the tilt direction of the spray holes (12) of the outer and inner layers spray rings (6).

3. A hydrocyclone water distributor for an anaerobic reactor according to claim 2, characterized in that: The water passage (10) is a tapered flow channel. The inlet diameter of the water passage (10) is equal to that of the second connecting hole (9), and the outlet diameter of the water passage (10) is 0.65-0.75 times the inlet diameter.

4. A hydrocyclone water distributor for an anaerobic reactor according to claim 3, characterized in that: The height of the shield-like protrusions (11) is 0.8-1.5mm. The front end of the shield-like protrusions (11) has an inclination angle of 22°±2° and the rear end has an inclination angle of 45°±3°. The distance between two adjacent shield-like protrusions (11) in the multiple sets of shield-like protrusions (11) is 2-3 times the protrusion height.

5. A hydrocyclone water distributor for an anaerobic reactor according to claim 4, characterized in that: The angle between the axis of the water spray hole (12) and the horizontal plane is 32°-38°. The length-to-diameter ratio of the water spray hole (12) is L / D = 4-6. The opening of the water spray hole (12) is provided with a chamfer structure. The chamfer angle of the opening of the water spray hole (12) is 60°±5°. The chamfer depth of the opening of the water spray hole (12) is 0.2-0.3mm.

6. A hydrocyclone water distributor for an anaerobic reactor according to claim 5, characterized in that: The rotating sleeve (4) is rotatably connected to the outer wall of the connecting pipe (2) by two sets of bearings, namely an upper angular contact bearing and a lower deep groove ball bearing.

7. A hydrocyclone water distributor for an anaerobic reactor according to claim 6, characterized in that: The rotating sleeve (4) and the connecting pipe (2) are sealed by two sets of double-lip sealing rings.

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