A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time

Abstract

The present invention discloses a sequencing batch aerobic sludge granulation reactor that controls selective pressure based on settling time. The reactor comprises a reaction tank, a mixing mechanism installed above the reaction tank, a sludge stirring mechanism installed below the reaction tank, a water supply pipe and a water outlet pipe connected to the reaction tank, a settling inclined plate group installed between the mixing mechanism and the sludge stirring mechanism, and a plurality of aeration devices installed at the bottom of the reaction tank, with the settling inclined plate group located between the aeration devices. The present invention can purify sewage by mixing already accumulated aerobic granular sludge with newly formed aerobic granular sludge, thereby accelerating the sewage purification rate and improving the utilization rate of the aerobic granular sludge. The stirred aerobic granular sludge has a fast settling rate, which accelerates the purification cycle. During drainage, the reactor can avoid excessive absorption of aerobic granular sludge, which would result in excessive discharge of aerobic granular sludge and reduced purification capacity.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage purification devices, and in particular relates to a sequencing batch aerobic sludge granulation reactor capable of controlling selective pressure based on settling time. Background Art

[0002] Compared to conventional activated sludge, aerobic granular sludge is less susceptible to sludge bulking, has strong shock resistance, can withstand high organic loads, and integrates microorganisms of different properties (aerobic, facultative, and anaerobic). It has been used in the treatment of municipal and industrial wastewater, effectively removing nitrogen and phosphorus, organic pollutants, and heavy metals.

[0003] The existing sequencing batch aerobic sludge granulation reactor has the following shortcomings:

[0004] 1. During sewage purification, since the aerobic granular sludge at the bottom layer is not turned over, only the aerobic granular sludge on the surface layer participates in sewage purification, which reduces the utilization rate and purification effect of the aerobic granular sludge;

[0005] 2. When draining water, it is easy to cause the water flow in the reactor to become chaotic, which in turn leads to the upstream of aerobic granular sludge and excessive discharge of aerobic granular sludge;

[0006] 3. The sedimentation rate of aerobic granular sludge after stirring is slow. Summary of the Invention

[0007] In view of the problems raised by the above background technology, the object of the present invention is to provide a sequencing batch aerobic sludge granulation reactor that controls the selective pressure based on the settling time.

[0008] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0009] A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time, comprising a reaction tank, a mixing mechanism installed above the reaction tank, a sludge stirring mechanism installed below the reaction tank, a water supply pipe and a water outlet pipe connected to the reaction tank, a settling inclined plate group installed between the mixing mechanism and the sludge stirring mechanism, and a plurality of aeration devices installed at the bottom of the reaction tank, wherein the settling inclined plate group is located between the aeration devices;

[0010] The mixing mechanism includes a first motor, a first stirring shaft connected to the output end of the first motor, and stirring blades installed on both sides of the first stirring shaft. The stirring blades are provided with a triangular arch main blade and vertical blades distributed at both ends of the triangular arch main blade. The triangular arch main blade is provided with a plurality of flow holes.

[0011] The outlet pipe includes a water outlet, a connecting pipe opening is provided in the middle of the outlet pipe, the lower end of the outlet pipe is connected to a plurality of U-shaped tail pipes through the connecting pipe opening, the ends of the U-shaped tail pipes are provided with water inlets opening upward, and the U-shaped tail pipes are respectively located at the four corners of the reaction tank;

[0012] The sludge stirring mechanism includes a second motor, a second stirring shaft connected to the output end of the second motor, and stirring cones installed on both sides of the second stirring shaft, wherein the stirring cones are provided with mud grooves;

[0013] The sedimentation inclined plate group consists of two sedimentation inclined plates in an eight-shaped shape.

[0014] It is further defined that a mounting frame is provided above the reaction tank, and the mixing mechanism is installed through the mounting frame. Such a structural design provides an installation position for the mixing mechanism through the mounting frame.

[0015] It is further defined that the first stirring shaft passes through the mounting frame, and a copper sleeve is installed at the joint, and a sealing ring is installed under the copper sleeve. Such a structural design prevents the first stirring shaft from being worn during rotation through the copper sleeve, and prevents moisture from leaking from the copper sleeve to the first motor through the sealing ring, causing safety hazards or frequent failures.

[0016] It is further defined that a water-proof cover is installed under the mounting frame, the first stirring shaft passes through the water-proof cover, a sponge is installed inside the water-proof cover, and a sealing ring is also installed at the junction of the water-proof cover and the first stirring shaft. Such a structural design further waterproofs the position close to the first motor through the water-proof cover, absorbs moisture through the sponge, and keeps the output end of the first motor dry.

[0017] It is further defined that a middle rod is horizontally arranged inside the reaction pool, the middle rod is provided with a first rotating seat, the top end of the first stirring shaft is rotatably connected to the first rotating seat, the bottom side wall of the reaction pool is provided with a second rotating seat, the top end of the second stirring shaft is rotatably connected to the second rotating seat. Such a structural design provides a rotation connection position of the first stirring shaft through the first rotating seat, and provides a rotation connection position of the second stirring shaft through the second rotating seat, so that the first stirring shaft and the second stirring shaft can rotate stably.

[0018] It is further defined that the bottom of the reaction tank is provided with a mounting groove matching the shape of the aeration device, and the upper surface of the aeration device is flush with the bottom plane of the reaction tank. Such a structural design reduces the installation height of the aeration device and avoids sludge accumulation on the left and right sides of the aeration device, causing interference with the aeration device when the second stirring shaft drives the stirring cone to rotate.

[0019] It is further defined that the discharge port of the water supply pipe is located at the upper part of the reaction tank. Such a structural design ensures that the sewage discharged from the water supply pipe will pass through the stirring range of the mixing mechanism.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention can mix the already accumulated aerobic granular sludge with the newly formed aerobic granular sludge to purify the sewage, thereby accelerating the sewage purification speed and improving the utilization rate of the aerobic granular sludge;

[0022] 2. The aerobic granular sludge after stirring settles quickly, which accelerates the purification cycle;

[0023] 3. When draining water, it can avoid excessive absorption of aerobic granular sludge, which will lead to excessive discharge of aerobic granular sludge and reduced purification capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0025] Figure 1 This is a schematic structural diagram of an embodiment of a sequencing batch aerobic sludge granulation reactor that controls selective pressure based on settling time according to the present invention;

[0026] Figure 2 This is a schematic top view of an embodiment of a sequencing batch aerobic sludge granulation reactor that controls selective pressure based on settling time according to the present invention;

[0027] Figure 3 Schematic diagram of the structure of the stirring blade in an embodiment of a sequencing batch aerobic sludge granulation reactor for controlling the selective pressure based on the settling time of the present invention;

[0028] Figure 4 This is an enlarged view of point A in an embodiment of a sequencing batch aerobic sludge granulation reactor for controlling selective pressure based on settling time according to the present invention;

[0029] The main component symbols are described as follows:

[0030] Reaction pool 1, middle rod 11;

[0031] Mounting rack 2;

[0032] Sludge stirring mechanism 3, second motor 31, second stirring shaft 32, stirring cone 33, mud trough 331, second rotating base 34;

[0033] Aeration device 4, sedimentation inclined plate group 5;

[0034] Mixing mechanism 6, first motor 61, first stirring shaft 62, stirring blade 63, triangular arch main blade 631, vertical blade 632, flow hole 633, first rotating seat 64, copper sleeve 65, sealing ring 66, water-proof cover 67, sponge 68;

[0035] Water outlet pipe 7, water outlet 71, U-shaped tail pipe 72, water inlet 73, connecting pipe opening 74;

[0036] Water supply pipe 8. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0038] like Figure 1-4 As shown, a sequencing batch aerobic sludge granulation reactor for controlling selective pressure based on settling time of the present invention includes a reaction tank 1, a mixing mechanism 6 is installed above the reaction tank 1, a sludge stirring mechanism 3 is installed below the reaction tank 1, the reaction tank 1 is connected to a water supply pipe 8 and a water outlet pipe 7, a settling inclined plate group 5 is installed between the mixing mechanism 6 and the sludge stirring mechanism 3, and a plurality of aeration devices 4 are installed at the bottom of the reaction tank 1, and the settling inclined plate group 5 is located between the aeration devices 4;

[0039] The mixing mechanism 6 includes a first motor 61, a first stirring shaft 62 connected to the output end of the first motor 61, and stirring blades 63 installed on both sides of the first stirring shaft 62. The stirring blades 63 are provided with a triangular arch main blade 631 and vertical blades 632 distributed at both ends of the triangular arch main blade 631. The triangular arch main blade 631 is provided with a plurality of flow holes 633.

[0040] The outlet pipe 7 includes a water outlet 71, a connecting pipe opening 74 is provided in the middle of the outlet pipe 7, and the lower end of the outlet pipe 7 is connected to a plurality of U-shaped tail pipes 72 through the connecting pipe opening 74. The ends of the U-shaped tail pipes 72 are provided with water inlets 73 opening upward. The U-shaped tail pipes 72 are respectively located at the four corners of the reaction tank 1;

[0041] The sludge stirring mechanism 3 includes a second motor 31, a second stirring shaft 32 connected to the output end of the second motor 31, stirring cones 33 installed on both sides of the second stirring shaft 32, and the stirring cones 33 are provided with a mud groove 331;

[0042] The sedimentation inclined plate group 5 consists of two sedimentation inclined plates in an eight-shaped shape.

[0043] During the implementation of this case, sewage flows into the reaction tank 1 through the water supply pipe 8, the sludge stirring mechanism 3, the mixing mechanism 6 and the aeration device 4 are started, and the air flow rises from the bottom of the reaction tank 1, pre-mixing the aerobic granular sludge accumulated in the reaction tank 1 through bubbles. The sludge stirring mechanism 3 is started, stirring the aerobic granular sludge at the bottom of the reaction tank 1 over a large area, so that the existing aerobic granular sludge can be fully integrated into the sewage, accelerating the sewage purification speed and improving the utilization rate of the aerobic granular sludge. The oxygen in the bubbles continues to rise and cooperates with the mixing mechanism 6 to complete the aeration treatment of the sewage. The collision and oxygen supply help to form new aerobic granular sludge. The mud groove 331 on the stirring cone 33 helps to stir the bottom sludge. The design of the triangular arch main blade 631 in the stirring blade 63 is conducive to reducing the resistance from the water flow and reducing the load of the mixing mechanism 6. The vertical blade 632 expands the stirring range, and the flow hole 633 assists the water flow to pass through, further reducing the water flow resistance.

[0044] After the aeration and stirring is completed, the sludge stirring mechanism 3, the mixing mechanism 6 and the aeration device 4 are shut down, and the aerobic granular sludge in the sewage automatically settles. Since the sedimentation inclined plate group 5 is provided between the aeration devices 4, and the sedimentation inclined plate group 5 is composed of eight-shaped sedimentation inclined plates, the sedimentation inclined plate group 5 increases the sedimentation surface area, and the aerobic granular sludge slides to both sides of the eight-shaped sedimentation inclined plates and accumulates directly above the aeration device 4, which is convenient for subsequent aeration and mixing;

[0045] After the automatic sedimentation is completed, the outlet pipe 7 absorbs the clean water in the upper layer of the reaction tank 1 through an external power source. Since the lower end of the outlet pipe 7 is connected to a plurality of U-shaped tail pipes 72 through a connecting pipe port 74, and the U-shaped tail pipes 72 are respectively located at the four corners of the reaction tank 1, the clean water will be discharged evenly through the U-shaped tail pipes 72 distributed at the four corners, and the water in the reaction tank 1 will not converge to one end, thereby causing the water layer in the reaction tank 1 to be turbulent, re-disturbing part of the aerobic granular sludge, causing the aerobic granular sludge to rise and be excessively discharged. The end of the U-shaped tail pipe 72 is provided with a water inlet 73 with an upward opening, so that the suction force is directed upward, which also avoids interference with the aerobic granular sludge below the reaction tank 1.

[0046] The present invention can mix the already accumulated aerobic granular sludge with the newly formed aerobic granular sludge to purify the sewage, thereby accelerating the sewage purification speed and improving the utilization rate of the aerobic granular sludge; and the aerobic granular sludge after stirring has a fast sedimentation speed, which accelerates the purification cycle; and when draining water, it can avoid excessive absorption of the aerobic granular sludge, which leads to excessive discharge of the aerobic granular sludge and reduced purification capacity.

[0047] Preferably, a mounting frame 2 is provided above the reaction tank 1, and the mixing mechanism 6 is installed through the mounting frame 2. Such a structural design provides an installation position for the mixing mechanism 6 through the mounting frame 2. In fact, other installation positions of the mixing mechanism 6 can also be considered according to specific circumstances.

[0048] Preferably, the first stirring shaft 62 passes through the mounting frame 2, and a copper sleeve 65 is installed at the junction, and a sealing ring 66 is installed below the copper sleeve 65. This structural design prevents wear of the first stirring shaft 62 during rotation through the copper sleeve 65, and prevents water from leaking from the copper sleeve 65 into the first motor 61 through the sealing ring 66, which could cause safety hazards or frequent malfunctions. In fact, other waterproof structures for the first motor 61 can also be considered according to specific circumstances.

[0049] Preferably, a waterproof cover 67 is installed below the mounting frame 2, through which the first stirring shaft 62 passes. A sponge 68 is installed inside the waterproof cover 67, and a sealing ring 66 is also installed at the junction of the waterproof cover 67 and the first stirring shaft 62. This structural design further waterproofs the area near the first motor 61 through the waterproof cover 67, and absorbs moisture through the sponge 68, keeping the output end of the first motor 61 dry. In fact, other waterproof structures for the first motor 61 can also be considered according to specific circumstances.

[0050] Preferably, a center rod 11 is disposed transversely within the reaction tank 1, and the center rod 11 is provided with a first rotating seat 64, the top end of the first stirring shaft 62 being rotatably connected to the first rotating seat 64. A second rotating seat 34 is disposed on the bottom sidewall of the reaction tank 1, and the top end of the second stirring shaft 32 is rotatably connected to the second rotating seat 34. This structural design provides a rotational connection position for the first stirring shaft 62 through the first rotating seat 64, and a rotational connection position for the second stirring shaft 32 through the second rotating seat 34, thereby enabling stable rotation of the first stirring shaft 62 and the second stirring shaft 32. In fact, other structures that enable stable rotation of the first stirring shaft 62 and the second stirring shaft 32 may also be considered according to specific circumstances.

[0051] Preferably, the bottom of the reaction tank 1 is provided with a mounting groove that matches the shape of the aeration device 4. The upper surface of the aeration device 4 is flush with the bottom plane of the reaction tank 1. This structural design reduces the installation height of the aeration device 4 and prevents sludge from accumulating on the left and right sides of the aeration device 4, which would interfere with the aeration device 4 when the second stirring shaft 32 drives the stirring cone 33 to rotate. In fact, other installation positions for the aeration device 4 can also be considered according to specific circumstances.

[0052] Preferably, the outlet of the water supply pipe 8 is located at the upper part of the reaction tank 1. Such a structural design allows the sewage discharged from the water supply pipe 8 to pass through the stirring range of the mixing mechanism 6. In fact, other locations of the outlet of the water supply pipe 8 can also be considered according to specific circumstances.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time, characterized by: The invention comprises a reaction tank (1), wherein a mixing mechanism (6) is installed above the reaction tank (1), a sludge stirring mechanism (3) is installed below the reaction tank (1), the reaction tank (1) is connected to a water supply pipe (8) and a water outlet pipe (7), a sedimentation inclined plate group (5) is installed between the mixing mechanism (6) and the sludge stirring mechanism (3), and a plurality of aeration devices (4) are installed at the bottom of the reaction tank (1), and the sedimentation inclined plate group (5) is located between the aeration devices (4); The mixing mechanism (6) comprises a first motor (61), a first stirring shaft (62) connected to the output end of the first motor (61), and stirring blades (63) installed on both sides of the first stirring shaft (62), wherein the stirring blades (63) are provided with a triangular arch main blade (631) and vertical blades (632) distributed at both ends of the triangular arch main blade (631), and the triangular arch main blade (631) is provided with a plurality of flow holes (633); The water outlet pipe (7) includes a water outlet (71), a connecting pipe opening (74) is provided in the middle of the water outlet pipe (7), the lower end of the water outlet pipe (7) is connected to a plurality of U-shaped tail pipes (72) through the connecting pipe opening (74), the ends of the U-shaped tail pipes (72) are provided with water inlets (73) opening upward, and the U-shaped tail pipes (72) are respectively located at the four corners of the reaction tank (1); The sludge stirring mechanism (3) comprises a second motor (31), a second stirring shaft (32) connected to the output end of the second motor (31), stirring cones (33) installed on both sides of the second stirring shaft (32), and the stirring cones (33) are provided with a mud groove (331); The settling inclined plate group (5) consists of two settling inclined plates in an eight-shaped shape.

2. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 1, characterized in that: A mounting frame (2) is provided above the reaction tank (1), and the mixing mechanism (6) is mounted via the mounting frame (2).

3. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 2, characterized in that: The first stirring shaft (62) passes through the mounting frame (2), and a copper sleeve (65) is installed at the joint, and a sealing ring (66) is installed below the copper sleeve (65).

4. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 3, characterized in that: A water-proof cover (67) is installed below the mounting frame (2), the first stirring shaft (62) passes through the water-proof cover (67), a sponge (68) is installed inside the water-proof cover (67), and a sealing ring (66) is also installed at the junction of the water-proof cover (67) and the first stirring shaft (62).

5. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 4, characterized in that: A middle rod (11) is transversely arranged inside the reaction pool (1), and the middle rod (11) is provided with a first rotating seat (64). The top end of the first stirring shaft (62) is rotatably connected to the first rotating seat (64). A second rotating seat (34) is provided on the bottom side wall of the reaction pool (1), and the top end of the second stirring shaft (32) is rotatably connected to the second rotating seat (34).

6. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 5, characterized in that: The bottom of the reaction tank (1) is provided with a mounting groove that matches the shape of the aeration device (4), and the upper surface of the aeration device (4) is flush with the bottom plane of the reaction tank (1).

7. A sequencing batch aerobic sludge granulation reactor with selective pressure controlled based on settling time according to claim 6, characterized in that: The water outlet of the water supply pipe (8) is located at the upper part of the reaction tank (1).

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