IC sludge backflow rotational flow mechanism

Abstract

The utility model discloses an IC (internal circulation) sludge backflow rotational flow mechanism. Four umbrella-shaped water distributors are uniformly distributed in a barrel of an anaerobic reactor in the circumferential direction. And the lower end of the conical cylindrical wall plate of the umbrella-shaped water distributor is connected with an annular vertical plate. And the inner side of one conical cylindrical wall plate is connected with three inner arc-shaped baffle plates. The sludge return pipe penetrates through the conical top of the conical cylindrical wall plate, and the lower end of the sludge return pipe is positioned in the umbrella-shaped water distributor. A flow guide block is mounted in the center of the bottom end of the anaerobic reactor barrel. Two water diversion bags are further included, and each water diversion bag is connected with two sets of water inlet branch pipes; and the water inlet nozzles of the same group of water inlet branch pipes are positioned in the same umbrella-shaped water distributor. Under the synergistic effect of the annular vertical plate and the arc-shaped baffle plate, a powerful rotational flow state is formed, and the mixed water flow forms a rotational flow shape and flows to the outer side of the umbrella-shaped water distributor to collide with the flow guide block again, so that a good water distribution mixing state is formed at the bottom of the whole IC anaerobic reactor, the formation and growth of anaerobic granular sludge at the bottom are accelerated, and the reaction efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to a sludge return swirl mechanism applied to an IC anaerobic reactor. It is mainly used for the swirling mixing of water and returned sludge within the anaerobic reactor. Background Technology

[0002] The IC anaerobic reactor is a core piece of equipment for the efficient treatment of high-concentration organic wastewater. Its core function relies on the thorough mixing of returned sludge and water within the reactor. Traditional mixing devices for returned sludge and water often use a single distribution pipe or simply distributed nozzles, which generally suffer from the following problems: First, the water distribution is not uniform enough, easily leading to local short-circuiting or dead zones, reducing reaction efficiency; second, it is prone to clogging, as high suspended solids wastewater easily clogs the distribution holes or nozzles, increasing maintenance costs; third, it has poor adaptability, making it difficult to adapt to different water quality or flow rate changes. Existing technologies also improve uniformity by increasing the number of distribution points, but these generally suffer from complex structures and are difficult to clean.

[0003] On the other hand, in traditional mixing devices that use existing technologies for returning sludge and water, the bottom periphery of the IC anaerobic reactor is subjected to less water flow impact, which easily leads to sludge accumulation and the formation of sludge dead zones. This not only increases cleaning costs but also affects the normal operation of wastewater treatment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an IC sludge return vortex mechanism, which further increases the mutual impact force between the returned sludge and water, and the water flow impact points are arranged more evenly to avoid the formation of sludge dead corners, which is more conducive to the formation of anaerobic granular sludge and achieves the purpose of increasing the concentration of anaerobic sludge.

[0005] The technical solution of this utility model is as follows:

[0006] The IC sludge return vortex mechanism includes an anaerobic reactor cylinder and a water distribution bag located on the outside of the anaerobic reactor cylinder. It also includes a sludge return pipe whose upper end is connected to the sludge return port of the gas-liquid separator inside the anaerobic reactor cylinder. Four umbrella-shaped water distributors are evenly distributed around the circumference of the anaerobic reactor cylinder. Each umbrella-shaped water distributor includes a conical wall plate with an annular vertical plate connected to its lower end. Three arc-shaped baffles are fixedly connected to the inner side of one conical wall plate. The center of each arc-shaped baffle is on the same side as the axis of the umbrella-shaped water distributor. The sludge return pipe passes through the apex of the conical wall plate and its lower end is located inside the umbrella-shaped water distributor. A guide block is fixedly installed at the center of the bottom of the anaerobic reactor cylinder. There are two water distribution bags, each connected to two sets of inlet branch pipes. Inlet nozzles are installed at the ends of the inlet branch pipes. The inlet nozzles of the same set of inlet branch pipes are located within the same umbrella-shaped water distributor.

[0007] Preferably, the height of the guide block is greater than or equal to that of the umbrella-shaped water distributor and has four inner arc-shaped sidewalls, each of which faces one umbrella-shaped water distributor.

[0008] More preferably, the circle in which the inner arc-shaped sidewall is located is concentric with the circle in which the annular vertical plate of the umbrella-shaped water distributor is located.

[0009] Preferably, the cone-shaped wall panel is fixed to the sludge return pipe.

[0010] Preferably, the water inlet nozzle sprays water in a horizontal direction.

[0011] Preferably, the lower end of the sludge return pipe is connected to the bottom end of the anaerobic reactor cylinder via a connecting frame.

[0012] The positive effects of this utility model are as follows:

[0013] Raw water is fed into the umbrella-shaped water distributor through a water distribution bag, inlet branch pipe, and inlet nozzle. Inside the umbrella-shaped water distributor, it is sprayed at high velocity through the nozzles. Under the synergistic effect of the annular vertical plate and the arc-shaped baffle, a strong swirling state is formed. The mixed water flow forms a swirling shape and flows to the outside of the umbrella-shaped water distributor, where it collides again with the guide block. This creates a good water distribution and mixing state at the bottom of the entire IC anaerobic reactor. This flow pattern can accelerate the formation and growth of anaerobic granular sludge at the bottom, further improving the reaction efficiency.

[0014] In addition, the umbrella-shaped water distributor's annular vertical plate and arc-shaped baffle play an auxiliary role in water distribution, making the water flow impact points more evenly distributed. The bottom perimeter of the IC anaerobic reactor is subjected to greater water flow impact force, which can more effectively prevent sludge accumulation around the tank and the formation of sludge dead corners, thereby reducing cleaning and maintenance costs. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the layout of the umbrella-shaped water distributor and the flow guide block in an embodiment of this utility model.

[0017] In the diagram, 1. Umbrella-shaped water distributor, 1-1. Annular vertical plate, 1-2. Arc-shaped baffle, 1-3. Conical wall plate, 2. Water distribution bag, 2-1. Inlet branch pipe, 2-2. Inlet nozzle, 3. Sludge return pipe, 4. Guide block, 5. Anaerobic reactor cylinder. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 and Figure 2This utility model relates to an embodiment of a sludge reflux swirling mechanism for an IC anaerobic reactor, comprising four umbrella-shaped water distributors 1 evenly distributed circumferentially inside the anaerobic reactor cylinder 5. A guide block 4 is installed at the center of the anaerobic reactor cylinder 5, and the bottom end of the guide block 4 is fixed to the bottom end of the anaerobic reactor cylinder 5.

[0020] The umbrella-shaped water distributor 1 includes a conical wall panel 1-3. The lower end of the conical wall panel 1-3 is connected (usually welded) to an annular vertical plate 1-1. Three arc-shaped baffles 1-2 are fixedly connected (usually welded) to the inner side of one of the conical wall panels 1-3. The center of the arc-shaped baffles 1-2 is on the same side as the axis of the umbrella-shaped water distributor 1, that is, the arc-shaped baffles 1-2 are all bent inward.

[0021] This embodiment also includes a sludge return pipe 3 that passes through the top of the conical wall panel 1-3, is connected at its upper end to the sludge return port of the gas-liquid separator in the IC anaerobic reactor, and is located at its lower end in the umbrella-shaped water distributor 1. The top of the conical wall panel 1-3 is fixed to the wall of the sludge return pipe 3, and the umbrella-shaped water distributor 1 is suspended in the anaerobic reactor cylinder 5 through the sludge return pipe 3.

[0022] To further reinforce the sludge return pipe 3, the lower end of the sludge return pipe 3 is connected to the bottom end of the anaerobic reactor body 5 via a connecting frame.

[0023] This embodiment also includes two water distribution packages 2 installed on the left and right sides of the outer side of the anaerobic reactor cylinder 5. Each water distribution package 2 is connected to two sets of two to four (three per set in this embodiment) inlet branch pipes 2-1. Each inlet branch pipe 2-1 is equipped with an inlet nozzle 2-2. The inlet nozzles 2-2 of one set of inlet branch pipes 2-1 are located within an umbrella-shaped water distributor 1. The spray direction of the inlet nozzles 2-2 is horizontal.

[0024] The guide block 4 is at a height no less than that of the umbrella-shaped water distributor 1 and has four inner arc-shaped sidewalls, each of which faces one umbrella-shaped water distributor 1. Preferably, the circle in which the inner arc-shaped sidewall is located is concentric with the circle in which the annular vertical plate 1-1 of the umbrella-shaped water distributor 1 it faces is located.

[0025] Raw water is pumped into each inlet branch pipe 2-1 by a water pump through a water distribution manifold 2. The raw water is then horizontally sprayed into the umbrella-shaped water distributor 1 through inlet nozzles 2-2. Simultaneously, the sludge return pipe 3 introduces the sludge returned from the gas-liquid separator in the IC anaerobic reactor into the umbrella-shaped water distributor 1. Under the action of the annular vertical plate 1-1 and the arc-shaped baffle 1-2, the raw water and the returned sludge are thoroughly mixed. The mixed water flow forms a swirling flow and flows to the outside of the umbrella-shaped water distributor 1, where it interacts again with the guide block 4, creating a well-distributed and mixed state at the bottom of the entire IC anaerobic reactor. This flow pattern accelerates the formation and growth of anaerobic granular sludge at the bottom, improving reaction efficiency.

Claims

1. IC sludge backflow cyclone mechanism, comprising an anaerobic reactor cylinder (5) and a water distribution bag (2) arranged outside the anaerobic reactor cylinder (5), further comprising a sludge backflow pipe (3) with an upper end connected to a sludge backflow port of a gas-liquid separator in the anaerobic reactor cylinder (5), characterized in that: Four umbrella-shaped water distributors (1) are evenly installed on the inner wall of the anaerobic reactor cylinder (5); the umbrella-shaped water distributor (1) comprises a conical wall plate (1-3), and the lower end of the conical wall plate (1-3) is connected with an annular vertical plate (1-1); the inner side of one conical wall plate (1-3) is fixedly connected with three arc-shaped baffles (1-2); the center of the arc-shaped baffle (1-2) and the axis of the umbrella-shaped water distributor (1) are located on the same side of the arc-shaped baffle; the sludge return pipe (3) penetrates through the top of the conical wall plate (1-3) and the lower end is located in the umbrella-shaped water distributor (1); the flow guide block (4) is fixedly installed at the center of the bottom end of the anaerobic reactor cylinder (5); the water distribution package (2) is two, and each water distribution package (2) is connected with two groups of water inlet branch pipes (2-1); the water inlet branch pipe (2-1) is provided with a water inlet nozzle (2-2) at the end; the water inlet nozzles (2-2) of the same group of water inlet branch pipes (2-1) are located in the same umbrella-shaped water distributor (1).

2. The IC sludge backflow cyclone mechanism of claim 1, wherein: The height of the flow guide block (4) is greater than or equal to that of the umbrella-shaped water distributor (1) and has four inner arc-shaped side walls, and each inner arc-shaped side wall faces one umbrella-shaped water distributor (1).

3. The IC sludge backflow cyclone mechanism of claim 2, wherein: The circle where the inner arc-shaped side wall is located is concentric with the circle where the annular vertical plate (1-1) of the umbrella-shaped water distributor (1) is located.

4. The IC sludge backflow cyclone mechanism of claim 1, wherein: The top of the conical wall plate (1-3) is fixed with the sludge return pipe (3).

5. The IC sludge backflow cyclone mechanism of claim 1, wherein: The spraying direction of the water inlet nozzle (2-2) is horizontal.

6. The IC sludge backflow cyclone mechanism of claim 1, wherein: The lower end of the sludge return pipe (3) is connected to the bottom end of the anaerobic reactor cylinder (5) through a connecting frame.

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