Anaerobic sludge granulation cultivation device

Abstract

This utility model discloses an anaerobic sludge particle acclimation and cultivation device. The device includes a tank with a jacketed outer wall containing a heat exchange medium inlet pipe and an outlet pipe. A sludge inlet pipe is located at the top, and a sludge outlet pipe at the bottom. Inside the tank is a stirring rod with stirring blades, driven by a motor. The stirring rod is a hollow tube, with a water distribution pipe at the bottom and a water delivery pipe at the top. The water delivery pipe connects to a wastewater buffer tank, which has a wastewater inlet pipe and a nutrient solution inlet pipe equipped with an electrically controlled valve and a flow meter, both connected to a control module. The water delivery pipe also has a pH meter. An alkaline solution inlet pipe with an electrically controlled valve is located at the top of the tank, both connected to the control module. The sludge outlet pipe connects to a screening chamber via a sludge return pipe. The screening chamber has a screen, a fine sludge discharge pipe, and a coarse sludge return pipe. This utility model, employing the above structure, enables precise temperature control, efficient water distribution, intelligent parameter adjustment, and sludge screening and return, improving acclimation efficiency and particle quality. It is suitable for treating high-concentration organic wastewater.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically an anaerobic sludge particle acclimatization and cultivation device. Background Technology

[0002] The acclimation and cultivation of anaerobic sludge particles is crucial to anaerobic biological treatment technology, and its quality directly affects wastewater treatment efficiency and system stability. Current traditional acclimation and cultivation devices suffer from several problems: insufficient precision in environmental control, difficulty in achieving stable and uniform temperature, reliance on manual adjustment of the influent wastewater-nutrient solution ratio and pH value, resulting in significant lag and impacting acclimation effectiveness; and poor water distribution and mixing, easily leading to uneven local hydraulic loads, resulting in insufficient contact between sludge particles and substrate, and potentially damaging the particle structure.

[0003] Furthermore, the acclimatization process lacks intelligent collaborative control, and the adjustment of the wastewater-nutrient solution ratio relies on experience, making it difficult to accurately implement gradient acclimatization strategies and resulting in weak system resistance to shocks. The sludge particle screening and recirculation mechanism is also imperfect, failing to separate small or aged particles in a timely manner, and resulting in low recirculation efficiency of high-quality particles, thus reducing acclimatization efficiency. Therefore, there is an urgent need for an acclimatization and cultivation device that integrates precise temperature control, efficient water distribution, intelligent regulation, and adaptive screening functions to address the shortcomings of traditional devices. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an anaerobic sludge particle acclimatization and cultivation device, which aims to solve the technical problems of insufficient environmental control precision, poor water distribution and mixing effect, lack of intelligent collaborative control and imperfect sludge particle screening and reflux mechanism in traditional anaerobic sludge particle acclimatization and cultivation devices.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an anaerobic sludge particle acclimatization and cultivation device, including a tank body, the outer wall of the tank body is provided with a jacket, the lower part of the jacket is provided with a heat exchange medium inlet pipe, the upper part of the jacket is provided with a heat exchange medium outlet pipe, the upper part of the tank body is provided with a sludge inlet pipe, and the lower part of the tank body is provided with a sludge outlet pipe.

[0006] The tank is equipped with a stirring rod, and the stirring rod is equipped with stirring blades. The upper end of the stirring blades extends to the outside of the top surface of the tank and is driven by a drive motor set on the top of the tank.

[0007] The stirring rod is a hollow tubular structure with a horizontal water distribution pipe at the lower end. The bottom surface of the water distribution pipe has multiple water distribution holes, and the upper end of the stirring rod located outside the tank is connected to a water delivery pipe.

[0008] In a preferred embodiment, the water supply pipe is connected to a wastewater buffer tank, which is equipped with a wastewater inlet pipe and a nutrient solution inlet pipe. Both the wastewater inlet pipe and the nutrient solution inlet pipe are equipped with a first electrically controlled valve and a flow meter. The wastewater buffer tank is also equipped with a stirring mechanism.

[0009] In a preferred embodiment, the first electrically controlled valve and flow meter on the wastewater inlet pipe and the nutrient solution inlet pipe are both connected to the control module.

[0010] In a preferred embodiment, a pH meter is installed near the output end of the water supply pipe, an alkali inlet pipe is installed at the top of the tank, and a second electrically controlled valve is installed on the alkali inlet pipe. Both the pH meter and the second electrically controlled valve are connected to the control module.

[0011] In a preferred embodiment, the upper end of the stirring rod and the output end of the water supply pipe are movably connected by a sleeve, and a sealing ring is provided at the connection between the two.

[0012] In a preferred embodiment, the sludge outlet pipe is connected to a sludge return pipe via a three-way valve. The sludge return pipe is connected to the screening chamber, which is equipped with a fine sludge discharge pipe and a coarse sludge return pipe.

[0013] In a preferred embodiment, the screening chamber is equipped with a screen, and the sludge return pipe and the coarse sludge return pipe are both connected to the screening chamber above the screen, while the fine sludge discharge pipe is located in the screening chamber below the screen.

[0014] In a preferred embodiment, the diameter of the plurality of water distribution holes gradually increases from the center of the tank outwards.

[0015] The anaerobic sludge granule acclimation and cultivation device provided by this utility model, by adopting the above-described structure, has the following beneficial effects:

[0016] (1) The temperature inside the tank can be uniformly controlled by circulating the heat exchange medium in the tank jacket, avoiding the impact of temperature fluctuations on microbial activity; combined with the pH detector linked to the control module and the electric control valves of the alkaline inlet pipe, wastewater and nutrient solution, the pH of the influent and the substrate ratio can be dynamically adjusted in real time, solving the problem of delay in manual operation and providing a stable environment for sludge particle acclimatization.

[0017] (2) The combination design of hollow stirring rod and water distribution pipe allows the water to diffuse synchronously with stirring, and the diameter of the water distribution hole increases from the center to the outside, which can balance the hydraulic load and ensure that the sludge particles are in full contact with the substrate. At the same time, the stirring action of the stirring blade avoids excessive shear force from damaging the particle structure and improves the uniformity of acclimatization.

[0018] (3) Granular sludge of different sizes is collected by screening chamber, and granular sludge that meets the target size is sent back to sludge bed through coarse sludge return pipe, while fine particles are discharged from the system to avoid excessive accumulation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a structural diagram showing the connection position between the stirring rod and the water delivery pipe in this utility model.

[0022] In the diagram: Tank 1, Jacket 2, Heat exchange medium inlet pipe 201, Heat exchange medium outlet pipe 202, Sludge inlet pipe 3, Sludge outlet pipe 4, Stirring rod 5, Stirring blade 6, Water distribution pipe 7, Water distribution hole 701, Drive motor 8, Wastewater buffer tank 9, Wastewater inlet pipe 10, Nutrient solution inlet pipe 11, First electric control valve 12, Flow meter 13, Stirring mechanism 14, Control module 15, Water delivery pipe 16, pH meter 17, Alkali solution inlet pipe 18, Second electric control valve 181, Sealing ring 19, Sludge return pipe 20, Screening chamber 21, Screen 211, Fine sludge discharge pipe 22, Coarse sludge return pipe 23. Detailed Implementation

[0023] like Figure 1-2 In the present invention, an anaerobic sludge particle acclimation and cultivation device includes a tank body 1, wherein the outer wall of the tank body 1 is provided with a jacket 2, the lower part of the jacket 2 is provided with a heat exchange medium inlet pipe 201, the upper part of the jacket 2 is provided with a heat exchange medium outlet pipe 202, the upper part of the tank body 1 is provided with a sludge inlet pipe 3, and the lower part of the tank body 1 is provided with a sludge outlet pipe 4.

[0024] The tank body 1 is equipped with a stirring rod 5, and the stirring rod 5 is equipped with stirring blades 6. The upper end of the stirring blades 6 extends to the outside of the top surface of the tank body 1 and is driven by a drive motor 8 set on the top of the tank body 1.

[0025] The stirring rod 5 is a hollow tubular structure. The lower end of the stirring rod 5 is provided with a horizontal water distribution pipe 7. The bottom surface of the water distribution pipe 7 is provided with multiple water distribution holes 701. The upper end of the stirring rod 5 located outside the tank body 1 is connected to a water delivery pipe 16.

[0026] In a preferred embodiment, the water supply pipe 16 is connected to the wastewater buffer tank 9. The wastewater buffer tank 9 is equipped with a wastewater inlet pipe 10 and a nutrient solution inlet pipe 11. Both the wastewater inlet pipe 10 and the nutrient solution inlet pipe 11 are equipped with a first electrically controlled valve 12 and a flow meter 13. The wastewater buffer tank 9 is also equipped with a stirring mechanism 14.

[0027] In a preferred embodiment, the first electrically controlled valve 12 and flow meter 13 on the wastewater inlet pipe 10 and the nutrient solution inlet pipe 11 are both connected to the control module 15.

[0028] In a preferred embodiment, a pH meter 17 is provided near the output end of the water supply pipe 16, and an alkali inlet pipe 18 is provided at the top of the tank body 1. A second electrically controlled valve 181 is provided on the alkali inlet pipe 18. Both the pH meter 17 and the second electrically controlled valve 181 are connected to the control module 15.

[0029] In a preferred embodiment, the upper end of the stirring rod 5 is movably connected to the output end of the water supply pipe 16 by means of a sleeve, and a sealing ring 19 is provided at the connection between the two.

[0030] In a preferred embodiment, the sludge outlet pipe 4 is connected to a sludge return pipe 20 via a three-way valve. The sludge return pipe 20 is connected to the screening chamber 21, which is equipped with a fine sludge discharge pipe 22 and a coarse sludge return pipe 23.

[0031] In a preferred embodiment, the screening chamber 21 is equipped with a screen 211, the sludge return pipe 20 and the coarse sludge return pipe 23 are both connected to the screening chamber 21 above the screen 211, and the fine sludge discharge pipe 22 is located on the screening chamber 21 below the screen 211.

[0032] In a preferred embodiment, the diameter of the plurality of water distribution holes 701 gradually increases from the center of the tank 1 outwards.

[0033] The anaerobic sludge granule acclimation and cultivation device proposed in the above embodiments operates as follows:

[0034] Anaerobic sludge particles are inoculated into tank 1 through sludge inlet pipe 3 (the inoculation amount is 40% of the tank volume, i.e., 4m³, and the sludge MLSS is 30g / L); 35℃ hot water is introduced into jacket 2 through heat exchange medium inlet pipe 201, and the hot water is circulated back through heat exchange medium outlet pipe 202 to stabilize the temperature inside tank 1 at 35±0.5℃.

[0035] During the sludge acclimatization and cultivation process, the control module 15, according to a preset program, adjusts the flow rates of the wastewater inlet pipe 10 and the nutrient solution inlet pipe 11 through the first electric control valve 12, so that the wastewater and nutrient solution enter the wastewater buffer tank 9 at a ratio of 8:2. After being stirred by the stirring mechanism 14 for 10 minutes, the mixture is homogeneous. The mixed substrate enters the hollow stirring rod 5 through the water supply pipe 16, and is then evenly sprayed into the sludge in the tank 1 through the water distribution holes 701 of the water distribution pipe 7. The initial influent flow rate is 1 m³ / h.

[0036] The drive motor 8 drives the stirring rod 5 and stirring blade 6 to rotate. The speed is set to 80 r / min to ensure that the sludge and the substrate are fully mixed and in contact. The sealing ring 19 at the connection between the stirring rod 5 and the water supply pipe 16 ensures that no leakage occurs.

[0037] The pH meter 17 on the water supply pipe 16 monitors the pH of the inlet water in real time. When the pH is lower than 6.5, the control module 15 controls the second electric control valve 181 to open and add 5% Na2CO3 solution into the tank 1 through the alkaline solution inlet pipe 18.

[0038] During operation, a portion of sludge is intermittently discharged through sludge outlet pipe 4 (the daily discharge amount is 5% of the total sludge volume in the tank), and enters sludge return pipe 20 through a three-way valve and flows into screening chamber 21. Fine sludge smaller than 1mm in the mesh size of screen 211 is discharged through fine sludge discharge pipe 22, while coarse sludge larger than 1mm is returned to tank 1 through coarse sludge return pipe 23, ensuring the quality of sludge particles in tank 1.

[0039] As the acclimatization process progresses, the control module 15 gradually increases the proportion of wastewater in the substrate (by 10% every 5 days) while correspondingly reducing the proportion of nutrient solution until the wastewater proportion reaches 100%. During this process, the influent flow rate is monitored in real time by the flow meter 13 to ensure stable influent flow, and the speed of the drive motor 8 is adjusted (between 50-150 r / min depending on the sludge mixing situation) to ensure sufficient reaction between the sludge and the substrate.

Claims

1. An anaerobic sludge granule acclimation and cultivation device, comprising a tank (1), characterized in that: The outer wall of the tank (1) is provided with a jacket (2), the lower part of the jacket (2) is provided with a heat exchange medium inlet pipe (201), the upper part of the jacket (2) is provided with a heat exchange medium outlet pipe (202), the upper part of the tank (1) is provided with a sludge inlet pipe (3), and the lower part of the tank (1) is provided with a sludge outlet pipe (4). The tank (1) is equipped with a stirring rod (5), and the stirring rod (5) is equipped with stirring blades (6). The upper end of the stirring blades (6) extends to the outside of the top surface of the tank (1) and is driven by a drive motor (8) set on the top of the tank (1). The stirring rod (5) is a hollow tubular structure. The lower end of the stirring rod (5) is provided with a horizontal water distribution pipe (7). The bottom surface of the water distribution pipe (7) is provided with multiple water distribution holes (701). The upper end of the stirring rod (5) located outside the tank (1) is connected to a water supply pipe (16).

2. The anaerobic sludge granule acclimation and cultivation device according to claim 1, characterized in that: The water supply pipe (16) is connected to the wastewater buffer tank (9). The wastewater buffer tank (9) is equipped with a wastewater inlet pipe (10) and a nutrient solution inlet pipe (11). The wastewater inlet pipe (10) and the nutrient solution inlet pipe (11) are each equipped with a first electric control valve (12) and a flow meter (13). The wastewater buffer tank (9) is also equipped with a stirring mechanism (14).

3. The anaerobic sludge granule acclimation and cultivation device according to claim 2, characterized in that: The first electrically controlled valve (12) and flow meter (13) on the wastewater inlet pipe (10) and nutrient solution inlet pipe (11) are both connected to the control module (15).

4. The anaerobic sludge granule acclimation and cultivation device according to claim 3, characterized in that: A pH meter (17) is installed near the output end of the water supply pipe (16), and an alkali inlet pipe (18) is installed on the top of the tank (1). A second electric control valve (181) is installed on the alkali inlet pipe (18). The pH meter (17) and the second electric control valve (181) are both connected to the control module (15).

5. The anaerobic sludge granule acclimation and cultivation device according to claim 1, characterized in that: The upper end of the stirring rod (5) is movably connected to the output end of the water supply pipe (16) by a sleeve connection, and a sealing ring (19) is provided at the connection between the two.

6. The anaerobic sludge granule acclimation and cultivation device according to claim 1, characterized in that: The sludge outlet pipe (4) is connected to a sludge return pipe (20) via a three-way valve. The sludge return pipe (20) is connected to the screening chamber (21). The screening chamber (21) is equipped with a fine sludge discharge pipe (22) and a coarse sludge return pipe (23).

7. The anaerobic sludge granule acclimation and cultivation device according to claim 6, characterized in that: The screening chamber (21) is equipped with a screen (211). The sludge return pipe (20) and the coarse sludge return pipe (23) are both connected to the screening chamber (21) above the screen (211). The fine sludge discharge pipe (22) is set on the screening chamber (21) below the screen (211).

8. The anaerobic sludge granule acclimation and cultivation device according to claim 1, characterized in that: The diameter of the multiple water distribution holes (701) gradually increases from the center of the tank (1) outwards.

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