MBR aeration device

Abstract

The utility model provides an MBR (Membrane Biological Reactor) aeration device. The aeration device comprises an aeration branch pipe and a sludge discharge assembly, the sludge discharge assembly comprises a sludge discharge pipe and a sludge scraping piece; the sludge discharge pipe is used for being communicated with an aeration branch pipe, and a sludge discharge port is formed in the bottom of the sludge discharge pipe; the sludge scraping piece is rotatably arranged in the sludge discharge pipe, and the sludge scraping piece is used for scraping sludge accumulated on the side wall of the sludge discharge pipe by introducing airflow and rotating. According to the aeration device, the sludge scraping piece is additionally arranged in the sludge discharging pipe, sludge in the sludge discharging pipe is cleaned through ventilation and rotation, the sludge discharging effect is improved, and operation is convenient.

Description

Technical Field

[0001] This disclosure relates to the field of water treatment technology, and more particularly to an MBR aeration device. Background Technology

[0002] Currently, MBR aeration methods employ perforated aeration branch pipes for aeration at the bottom of the membrane. The air bubbles contact the membrane, creating a scrubbing or agitating effect to prevent sludge deposition on the membrane fibers. However, after the equipment has been running for a period, sludge buildup and blockage occur in the aeration branch pipes, along with blockages at the aeration outlets. This blockage weakens the membrane's scrubbing effect, ultimately leading to membrane fouling, a decrease in permeate flux, and an increase in vacuum.

[0003] An existing Chinese utility model patent application (CN202121602769.2) discloses an MBR aeration device with a sludge discharge assembly. The MBR aeration device includes a membrane frame and aeration branch pipes. A sludge discharge assembly is located at the end of each aeration branch pipe. The sludge discharge assembly includes a square tube, one side of which is connected to the aeration branch pipe. One end of the square tube has a first sludge discharge hole, and the other end has a second sludge discharge hole. A third sludge discharge hole is located between the first and second sludge discharge holes. The sludge discharge principle is as follows: when the aeration branch pipe becomes clogged, the internal pressure increases, and the accumulated sludge inside the aeration branch pipe is discharged along with the air-water mixture from the first and second sludge discharge holes. Simultaneously, the third sludge discharge hole is connected to a vent pipe that extends upwards to the top of the MBR membrane module. A valve is installed on this vent pipe as a sludge discharge valve for manual sludge discharge. If excessive sludge accumulates at the bottom of the square tube and hardens and dewaters, simply opening the sludge discharge valve to allow airflow is insufficient for sludge discharge. Utility Model Content

[0004] The purpose of this disclosure is to provide an MBR aeration device to solve the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this disclosure are as follows:

[0006] This disclosure provides an MBR aeration device, which includes an aeration branch pipe and a sludge discharge assembly. The sludge discharge assembly includes a sludge discharge pipe and a sludge scraper. The sludge discharge pipe is connected to the aeration branch pipe, and a sludge discharge port is provided at the bottom of the sludge discharge pipe. The sludge scraper is rotatably disposed inside the sludge discharge pipe, and the sludge scraper scrapes off the sludge accumulated on the side wall of the sludge discharge pipe by introducing airflow and rotating.

[0007] Optionally, the sludge scraper includes: an end cap, a motor, a hollow rotating shaft, hollow support rods, and a scraper blade; the end cap is detachably connected to one end of the sludge discharge pipe, one end of the hollow rotating shaft passes through the central area of ​​the side of the end cap facing the sludge discharge pipe, the motor is located on the side of the end cap away from the sludge discharge pipe, and the output shaft of the motor is connected to one end of the hollow rotating shaft; at least one side of the hollow rotating shaft is provided with one end of a plurality of hollow support rods spaced apart, the plurality of hollow support rods are arranged horizontally, the hollow rotating shaft is connected to each of the hollow support rods, the hollow support rods are provided with a plurality of through holes staggered along their length, and the other end of the hollow support rods is connected to the scraper blade; the other end of the hollow rotating shaft is connected to the other end of the sludge discharge pipe for connecting to a blower.

[0008] Optionally, one end of a plurality of hollow support rods is provided at intervals on opposite sides of the sludge discharge pipe, and the other end of the hollow support rods on both sides is connected to a corresponding scraper, with the two scrapers being parallel.

[0009] Optionally, the sludge discharge pipe is provided with sludge discharge ports near the bottom of both ends.

[0010] Optionally, the sludge discharge pipe is a circular pipe, and the sludge scraper is clearance-fitted with the sludge discharge pipe;

[0011] The scraper blade is hollow and connected to a hollow support rod. The scraper blade is evenly provided with multiple through holes.

[0012] Optionally, the sludge scraper includes: an end cap, a motor, a hollow rotating shaft, and a sludge scraper block hinged to the hollow rotating shaft; the end cap is detachably connected to one end of the sludge discharge pipe, and the motor is disposed in the central area of ​​the side of the end cap opposite to the sludge discharge pipe, with the output shaft of the motor passing through the end cap;

[0013] One end of the hollow rotating shaft is connected to the motor output shaft on the side of the end cover facing the mud discharge pipe; the hollow support rod has multiple through holes staggered along its length, and the other end of the hollow rotating shaft is connected to the other end of the mud discharge pipe for connecting to a blower;

[0014] The scraper blocks are arranged alternately along the length of the rotation axis.

[0015] Optionally, the end of the sludge scraper opposite to the rotating shaft is fitted with a clearance fit to the side wall of the sludge discharge pipe.

[0016] Optionally, the bottom of each of the sludge scrapers is connected to cover the bottom of the sludge discharge pipe along its length.

[0017] Optionally, the end cap is provided with a hanging ring; the outer wall of the sludge discharge pipe is provided with a locking block, and the side wall of the locking block opposite to the end cap is provided with an outward protrusion, and the hanging ring is hung on the side of the sludge discharge pipe facing the protrusion.

[0018] Optionally, the end cap is provided with fixing strips spaced at a preset distance, and the two ends of the hanging ring are respectively inserted into the corresponding fixing strips; each end of the two fixing strips is provided with opposing protruding limiting clips.

[0019] For example, the end cap is detachably connected to the sludge discharge pipe via threads.

[0020] The beneficial effects of the embodiments disclosed herein are:

[0021] The MBR aeration device of this embodiment does not require an additional scraper in the sludge discharge pipe. The scraper cleans the sludge in the sludge discharge pipe by air circulation and rotation, thus avoiding blockage of the sludge discharge port. The scraper has a simple structure and is easy to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an MBR aeration device according to an embodiment of this disclosure;

[0023] Figure 2 yes Figure 1 Enlarged view of A in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of an end cap of an MBR aeration device according to an embodiment of this disclosure;

[0025] Figure 4 This is another structural schematic diagram of the sludge scraper of an MBR aeration device proposed in this disclosure;

[0026] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure of the mud scraper.

[0027] In the picture,

[0028] 200. Sludge discharge assembly; 210. Sludge discharge pipe; 211. Clamping block; 212. Protrusion; 213. Vent pipe; 220. Sludge scraper; 221. Hollow rotating shaft; 222. Sludge scraper; 223. Hollow support rod; 224. Sludge scraper block; 230. End cap; 231. Hanging ring; 232. Fixing strip; 233. Limiting protrusion; 234. Motor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this disclosure and are not intended to limit the embodiments of this disclosure.

[0030] like Figure 1As shown in the figure, this disclosure provides an MBR aeration device, which includes an aeration branch pipe and a sludge discharge assembly. The sludge discharge assembly 200 includes a sludge discharge pipe 210 and a sludge scraper 220. The sludge discharge pipe 210 is connected to the aeration branch pipe, and a sludge discharge port is provided at the bottom of the sludge discharge pipe 210. The sludge scraper 220 is rotatably disposed in the sludge discharge pipe 210, and the sludge scraper 220 scrapes off the sludge accumulated in the sludge discharge pipe 210 by introducing airflow and rotating.

[0031] The aeration device of this embodiment can be installed at the bottom of the membrane frame, or it can be applied to other wetland systems according to actual conditions. The connection method between the aeration branch pipe and the sludge discharge pipe can be set according to actual conditions. For example, the end of the aeration branch pipe is set at the sludge discharge assembly 200. A through hole communicating with the aeration branch pipe is provided on one side of the sludge discharge pipe. The aeration branch pipe is provided with multiple aeration holes, which will not be described in detail here. Multiple aeration branch pipes can be horizontally connected to the sludge discharge pipe. During aeration, the aeration branch pipe is supplied with aeration airflow to achieve aeration. When the aeration branch pipe is blocked, causing the internal pressure to rise, the airflow is forced to be discharged from the sludge discharge port of the sludge discharge pipe. Pressure sensors can be installed inside the sludge discharge pipe. By detecting the pressure inside the sludge discharge pipe, the blockage status of the sludge discharge pipe can be obtained. When the sludge discharge port is blocked and sludge needs to be discharged, the sludge discharge airflow is introduced into the scraper. The airflow generates turbulence in the sludge discharge pipe. Rotating the scraper in combination with the airflow can scrape off the sludge at the bottom of the sludge discharge pipe. At this point, the size of the sludge discharge port can be set according to the actual situation, but it should not be too large to avoid sludge flowing back from the bottom.

[0032] like Figure 1 As shown, the sludge scraper 220 includes: an end cap 230, a motor 234, a hollow rotating shaft 221, and a scraper blade 222; the end cap 230 is detachably connected to one end of the sludge discharge pipe 210, one end of the hollow rotating shaft 221 passes through the central area of ​​the side of the end cap 230 facing the sludge discharge pipe 210, and the motor 234 is arranged on the side of the end cap 230 away from the sludge discharge pipe 210, with the output shaft of the motor 234 connected to one end of the hollow rotating shaft 221; At least one side of the hollow rotating shaft 221 is provided with one end of a plurality of hollow support rods 223 at intervals. The plurality of hollow support rods 223 are arranged horizontally. The hollow rotating shaft 221 is connected to each of the hollow support rods 223. The hollow support rods 223 are provided with a plurality of through holes (not shown in the figure) staggered along the length direction. The other end of the hollow support rods 223 is connected to the scraper 222. The other end of the hollow rotating shaft 221 is connected to the other end of the sludge discharge pipe 210 for connecting to the blower.

[0033] In this embodiment, one end of the hollow rotating shaft can be sealed to an end cap via a bearing. The end cap can be fitted with a sealing element to achieve a sealed connection with the sludge discharge pipe. The inner side of the other end of the sludge discharge pipe can be rotatably connected to the other end of the hollow rotating shaft via a bearing. One end of a vent pipe 213 is fixedly connected to the outer side of the other end of the sludge discharge pipe, and the other end of the vent pipe is connected to a blower to provide airflow to the hollow rotating shaft. In addition to being connected to the hollow support rod, the hollow rotating shaft can also be provided with multiple through holes for venting. When sludge scraping is required, the aerator supplies air to the hollow rotating shaft through the vent pipe 213. The hollow rotating shaft rotates under the action of a motor, driving the scraper blade to rotate. Under the combined action of turbulence and the scraper blade, the sludge in the sludge discharge pipe gradually exits from the discharge port. The scraper blade is only located at the end of the hollow support rod, resulting in a simple structure and light weight. The specific material of the scraper component can be set according to actual conditions.

[0034] To improve the efficiency of sludge scraping, symmetrical scraper blades can be installed on both sides of the sludge discharge pipe. Multiple hollow support rods are spaced apart on one end of each opposite side of the sludge discharge pipe 210, and the other end of each hollow support rod is connected to a corresponding scraper blade. The two scraper blades are parallel to each other.

[0035] Two or more sludge discharge ports can be provided, and the bottom of the sludge discharge pipe near both ends is provided with sludge discharge ports (not shown in the figure).

[0036] To cooperate with the scraper blade and achieve thorough scraping without dead angles, the sludge discharge pipe can be a circular pipe, with the scraper blade fitting snugly against it. The scraper blade is hollow and connected to a hollow support rod, and it has multiple evenly spaced through holes. In other words, a very small gap remains between the bottom of the scraper blade and the sludge discharge pipe. The scraper blade can also vent air outwards through the through holes to increase gas flow within the sludge discharge pipe, thus promoting the movement of the sludge.

[0037] like Figure 4 and Figure 5 As shown, the sludge scraper includes: an end cap, a motor, a hollow rotating shaft 221, and sludge scraper blocks 224 hinged to the hollow rotating shaft; the end cap is detachably connected to one end of the sludge discharge pipe, and the motor is located in the central area of ​​the side of the end cap facing away from the sludge discharge pipe, with the output shaft of the motor passing through the end cap; one end of the hollow rotating shaft is connected to the motor output shaft on the side of the end cap facing the sludge discharge pipe; the hollow support rod has multiple through holes staggered along its length, and the other end of the hollow rotating shaft is connected to the other end of the sludge discharge pipe for connecting to a blower; multiple sludge scraper blocks 224 are staggered along the length of the rotating shaft.

[0038] This disclosure proposes another structure for the sludge scraper. A hollow rotating shaft has multiple hinged members spaced at a predetermined distance along its length. A hinge shaft is provided between the two hinged members. One end of the sludge scraper is movably disposed on the hinge shaft. The shape of the sludge scraper can be set according to the actual situation. After the hollow rotating shaft rotates, each sludge scraper rotates perpendicular to the hollow rotating shaft under the action of centrifugal force, making it easier for the sludge scraper to break up the sludge in the sludge discharge pipe.

[0039] To achieve thorough sludge removal, the end of the scraper block facing away from the rotating shaft is fitted with a clearance fit against the side wall of the sludge discharge pipe. The bottom of the scraper block covers the bottom of the sludge discharge pipe along its length, ensuring that the sludge discharge pipe can be cleaned along its entire length.

[0040] like Figure 2 As shown, the end cap 230 is provided with a hanging ring 231; the outer wall of the sludge discharge pipe 210 is provided with a locking block 211, and the side wall of the locking block 211 opposite to the end cap 230 is provided with an outward protrusion 212, and the hanging ring 231 hangs on the side of the protrusion 212 facing the sludge discharge pipe 210.

[0041] In this embodiment, at least two hanging rings can be provided along the circumference of the end cap, and at least two locking blocks can be provided along the circumference of the mud discharge pipe. The hanging rings and locking blocks correspond one-to-one, and the specific number can be set according to the actual situation.

[0042] like Figure 3 As shown, the end cap 230 is provided with fixing strips 232 spaced at a preset distance, and the two ends of the hanging ring 231 are respectively inserted into the corresponding fixing strips 232; each end of the two fixing strips 232 is provided with a limiting protrusion 233 with opposing protrusions 212.

[0043] When using, bend the hanging ring from the end cover past the limit card protrusion toward the mud discharge pipe, and forcefully engage the bottom of the hanging ring past the card block protrusion; when removing the end cover, forcefully bend the bottom of the hanging ring past the card block protrusion to disengage the hanging ring from the card block, and then bend the hanging ring past the limit card protrusion toward the end cover.

[0044] The end cap and the mud discharge pipe are detachably connected by threads.

[0045] The above description is only a preferred embodiment of the present disclosure. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present disclosure, and these improvements and modifications should also be considered within the protection scope of the present disclosure.

Claims

1. An MBR aeration device, characterized in that, The aeration device includes: aeration branch pipes and sludge discharge assembly (200); The sludge discharge assembly (200) includes: a sludge discharge pipe (210) and a sludge scraper (220); the sludge discharge pipe (210) is connected to an aeration branch pipe, and a sludge discharge port is provided at the bottom of the sludge discharge pipe (210); The sludge scraper (220) is rotatably disposed inside the sludge discharge pipe (210). The sludge scraper (220) scrapes off the sludge accumulated on the side wall of the sludge discharge pipe (210) by introducing airflow and rotating.

2. The apparatus according to claim 1, characterized in that, The sludge scraper (220) includes: an end cap (230), a motor (234), a hollow rotating shaft (221), a hollow support rod (223), and a sludge scraper (222); The end cap (230) is detachably connected to one end of the mud discharge pipe (210). One end of the hollow rotating shaft (221) passes through the central area of ​​the end cap (230) facing the mud discharge pipe (210). The motor (234) is arranged on the side of the end cap (230) away from the mud discharge pipe (210). The output shaft of the motor (234) is connected to one end of the hollow rotating shaft (221). The hollow rotating shaft (221) has at least one side of a plurality of hollow support rods (223) spaced apart at one end. The plurality of hollow support rods (223) are arranged horizontally. The hollow rotating shaft (221) is connected to each of the hollow support rods (223). The hollow support rods (223) are provided with a plurality of through holes in a staggered manner along the length direction. The other end of the hollow support rods (223) is connected to the scraper (222). The other end of the hollow rotating shaft (221) is connected to the other end of the mud discharge pipe (210) for connecting to the blower.

3. The apparatus according to claim 2, characterized in that, The sludge discharge pipe (210) has a plurality of hollow support rods (223) spaced apart on one side, and the other end of the hollow support rods (223) on both sides is connected to the corresponding scraper (222), and the two scraper (222) are parallel.

4. The apparatus according to claim 2, characterized in that, The mud discharge pipe (210) has mud discharge ports at its bottom near both ends.

5. The apparatus according to claim 3, characterized in that, The sludge discharge pipe (210) is a circular pipe, and the sludge scraper (222) is in clearance fit with the sludge discharge pipe (210); The scraper (222) is hollow and connected to the hollow support rod (223). The scraper (222) is evenly provided with multiple through holes.

6. The apparatus according to any one of claims 2 to 5, characterized in that, The sludge scraper (220) includes: an end cap (230), a motor (234), a hollow rotating shaft (221), and a sludge scraper block (224) hinged to the hollow rotating shaft (221); the end cap (230) is detachably connected to one end of the sludge discharge pipe (210), and the motor (234) is disposed in the central area of ​​the side of the end cap (230) away from the sludge discharge pipe (210), and the output shaft of the motor (234) passes through the end cap (230); One end of the hollow rotating shaft (221) is connected to the output shaft of the motor (234) on the side of the end cover (230) facing the mud discharge pipe (210); the hollow support rod (223) has multiple through holes arranged alternately along its length; the other end of the hollow rotating shaft (221) is connected to the other end of the mud discharge pipe (210) for connecting to the blower; Multiple scraper blocks (224) are staggered along the length of the rotation axis.

7. The apparatus according to claim 6, characterized in that, The end of the scraper block (224) facing away from the rotating shaft is fitted with the side wall of the sludge discharge pipe (210) with a clearance.

8. The apparatus according to claim 6, characterized in that, The bottom of each of the scraper blocks (224) is connected and covers the bottom of the sludge discharge pipe (210) along its length.

9. The apparatus according to any one of claims 2 to 5, characterized in that, The end cap (230) is provided with a hanging ring (231); the outer wall of the sludge discharge pipe (210) is provided with a locking block (211), and the side wall of the locking block (211) away from the end cap (230) is provided with an outward protrusion (212), and the hanging ring (231) hangs on the side of the protrusion (212) facing the sludge discharge pipe (210).

10. The apparatus according to claim 9, characterized in that, The end cap (230) is provided with fixing strips (232) spaced at a preset distance, and the two ends of the hanging ring (231) are respectively inserted into the corresponding fixing strips (232); Each of the two fixing bars (232) has a limiting protrusion (233) with opposing protrusions (212) at each opposite end.

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