Efficient and energy-saving type of aquaculture wastewater anaerobic treatment system

Abstract

This invention discloses a high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater, relating to the field of aquaculture wastewater treatment technology. It includes an IC anaerobic reactor for wastewater treatment, with an anaerobic reaction device added inside the IC anaerobic reactor. The anaerobic reaction device has a mixing tank for mixing granular and liquid reagents, and a mixing disc is installed inside the mixing tank. In this invention, when wastewater conditioned by a water quality regulating tank is transported to the base through the inlet, a swirling flow is achieved with the help of a water distributor, and biogas lift drives the flow of the sludge-water mixture. Subsequently, the wastewater overflows the base and disperses in all directions, at which point the drive shaft drives the agitator to stir. Especially for treating high-viscosity wastewater that easily deposits sludge, or for applications requiring extremely high operational stability, the agitator assists in enhancing mixing through internal circulation, ensuring sufficient degradation of organic matter and improving the overall COD removal rate of the wastewater.

Description

Technical Field

[0001] This invention specifically relates to the field of aquaculture wastewater treatment technology, and more specifically to a high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater. Background Technology

[0002] The IC anaerobic reactor uses bottom-feed water mixed with sludge. Under the action of high-concentration anaerobic sludge, most of the organic matter in the wastewater is converted into biogas. Biogas contains toxic and harmful substances such as hydrogen sulfide and sulfites, which will affect the normal activity of anaerobic microorganisms.

[0003] Chinese Patent Application No. 202120112358.9 discloses a purification device for an IC anaerobic reactor. The purification device includes an air injection pipe and an air compressor. The air compressor is installed on the air injection pipe, and one end of the air injection pipe is connected to the top gas phase zone of the IC anaerobic reactor.

[0004] The first reaction zone of the IC anaerobic reactor purification device in the aforementioned patent utilizes the combination of water flow and a distributor to achieve rotating water distribution. However, relying solely on the distributor and biogas disturbance, fluctuations in influent water quality / quantity (such as localized impacts from high-concentration wastewater) can easily lead to substrate "short-circuiting" (wastewater flowing away before sufficient contact with sludge), or excessively high / low sludge concentrations in certain areas. This results in some areas where organic matter cannot be fully degraded (excessive substrate but insufficient sludge contact), or decreased sludge activity due to substrate scarcity, ultimately affecting the overall COD removal rate and increasing the burden on subsequent treatment processes.

[0005] If the influent contains a large amount of recalcitrant substances (such as long-chain organic matter and complex aromatic hydrocarbons), the hydrolytic acidifying bacteria metabolize slowly and require auxiliary agents to promote decomposition. Existing IC anaerobic reactors do not have the function of adding chemicals. Summary of the Invention

[0006] The purpose of this invention is to provide a highly efficient and energy-saving anaerobic treatment system for aquaculture wastewater. During water distribution, the system can agitate the wastewater to ensure sufficient contact between the wastewater and the bottom sludge, preventing excessively high or low local sludge concentrations. Furthermore, the system can be enhanced by adding certain chemicals to stabilize the anaerobic reaction. This addresses the technical problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater includes an IC anaerobic reactor for wastewater treatment, with an anaerobic reaction device added inside the IC anaerobic reactor; the anaerobic reaction device has a reagent mixing tank for mixing granular and liquid reagents, and a reagent mixing disc is installed inside the reagent mixing tank.

[0009] Several drain pipes are evenly distributed around the perimeter of the drug mixing tank, and dispersion fins for emulsifying and dispersing the drug solution are provided below the drug mixing tank.

[0010] The drug mixing disc is driven by a toothed cylinder, which is mounted on the drive shaft; the lower end of the drive shaft extends into the connecting cylinder and is connected to the stirring paddle; the lower end of the stirring paddle is rotatably connected to the shaft cylinder in the middle of the base through a bearing.

[0011] The base has a water distributor on its inner bottom side, and a water inlet hole is also provided on one side of the bottom of the base.

[0012] As a further technical solution of the present invention, the upper end of the drain pipe is connected to a 90-degree connector, and the 90-degree connector is threadedly connected to the reagent mixing tank; when the lower end of the reagent mixing plate is in contact with the bottom side of the reagent mixing tank, the water inlet of the 90-degree connector can be blocked.

[0013] As a further technical solution of the present invention, the bottom of the medicine mixing box is fixed with a bracket around its perimeter, and the bracket is fixed to the upper fixed plate with bolts; the bottom of the upper fixed plate is fixed with an upper connecting plate with bolts, and a lower connecting plate is provided below the upper connecting plate.

[0014] The bottom of the upper connecting plate and the top of the lower connecting plate are both provided with sliding grooves; an upper toothed plate is rotatably connected in the sliding grooves; the outer periphery of the upper toothed plate is provided with several dispersed fins in a ring array and is fixed by screws.

[0015] As a further technical solution of the present invention, the outer ring array of the upper connecting plate and the lower connecting plate has a plurality of C-shaped frames; the upper end of the C-shaped frame is fixed to the upper fixed plate by bolts, and the lower end of the C-shaped frame is engaged with the groove on the lower fixed plate and fixed by bolts.

[0016] The upper and lower fixing plates are also fastened with protective nets, and the top and bottom of the two protective nets are fixed by locking clamps; the protective nets are located on the outside of the C-shaped frame.

[0017] As a further technical solution of the present invention, the upper end of the base is fixed to the connecting cylinder by bolts, and the upper end of the connecting cylinder is fixed to the lower fixed plate.

[0018] As a further technical solution of the present invention, the lower end of the drive shaft has a lower toothed shaft section, which is inserted into the splined cylinder at the top of the stirring paddle.

[0019] The drive shaft is fitted with a lower gear plate at its center position with an interference fit, and an upper gear shaft section is also provided at the center position of the drive shaft, which meshes with a gear; the gear is fitted onto the output shaft of the rotary motor; the rotary motor is fixed to the semi-circular plate inside the upper fixed plate.

[0020] As a further technical solution of the present invention, a fixing cylinder is provided with an upward protrusion in the middle of the drug mixing box, and a return spring is sleeved on the outside of the fixing cylinder;

[0021] The pharmaceutical mixing disc has a convex longitudinal section shaft hole at its axial center position and is fitted onto the fixed cylinder; the return spring is located inside the convex shaft hole.

[0022] The top of the drive shaft is connected to the cylinder rod of the cylinder via a rotary connector, and the cylinder is fixed to the top of the drug mixing tank via a mounting bracket.

[0023] As a further technical solution of the present invention, a plurality of slots are provided at the bottom of the drug mixing plate to facilitate the outflow of the drug liquid; when the drug mixing plate is lifted by the reset spring, the drug liquid passes through the slots and is discharged along the drain pipe;

[0024] The upper surface of the fixed cylinder that protrudes upward in the middle of the drug mixing disc is toothed and engages with the teeth at the bottom of the toothed cylinder.

[0025] As a further technical solution of the present invention, the anaerobic reactor is installed in the first reaction zone inside the IC anaerobic reactor; the anaerobic reactor is fixed to the equipment platform; and a ladder is installed on one side of the equipment platform.

[0026] As a further technical solution of the present invention, the equipment platform is provided with at least one water quality conditioning tank; the IC anaerobic reactor is connected to the water quality conditioning tank through a pipeline.

[0027] The water quality conditioning tank and the sedimentation tank are connected by a pipeline; a dosing device is also provided on one side of the sedimentation tank.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. In this invention, when the wastewater, conditioned in the water quality regulating tank, is delivered to the base through the inlet, it achieves swirling flow with the help of the water distributor. Biogas lifts the mixture, causing it to flow. Subsequently, the wastewater overflows the base and disperses outwards, at which point the drive shaft drives the agitator to stir it. Especially for treating high-viscosity wastewater that easily deposits sludge, or for applications requiring extremely high operational stability (continuous production without downtime), the agitator assists in enhancing internal circulation and mixing, ensuring thorough degradation of organic matter and improving the overall COD removal rate of the wastewater.

[0030] 2. In this invention, when the mixing disc is lifted by the return spring, the liquid medicine is discharged downwards through the drain pipe. The upper toothed disc drives the dispersing fins to rotate at high speed. A small gap is reserved between the dispersing fins and the C-shaped frame. Therefore, when the medicine is agitated by the dispersing fins, the small gap can shear the particles in the medicine, achieving a better dispersion and emulsification effect when mixed with the liquid medicine. Furthermore, when the dispersing fins are agitated at high speed, the medicine and particles are thrown onto the protective net, thereby also achieving an impact crushing and dispersion effect. This increases the mixing effect of the liquid medicine and wastewater. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0032] Figure 2 In this invention Figure 1 Another perspective illustration.

[0033] Figure 3 In this invention Figure 1 Rear view.

[0034] Figure 4 This is a schematic diagram of the IC anaerobic reactor in this invention.

[0035] Figure 5 In this invention Figure 4 The main view.

[0036] Figure 6 In this invention Figure 5 AA sectional view.

[0037] Figure 7 This is a schematic diagram of the anaerobic reaction device in this invention.

[0038] Figure 8 In this invention Figure 7 BB cross-sectional view.

[0039] Figure 9 This is a three-dimensional structural diagram of the anaerobic reaction device in this invention.

[0040] Figure 10 In this invention Figure 9 A schematic diagram of the split structure.

[0041] Figure 11 In this invention Figure 10 Another perspective illustration.

[0042] Figure 12 In this invention Figure 11 Another perspective illustration.

[0043] Figure 13 In this invention Figure 8A magnified view of a portion of the image.

[0044] Figure 14 In this invention Figure 10 A magnified view of a portion of the image.

[0045] Figure 15 In this invention Figure 11 A magnified view of a portion of the image.

[0046] Figure 16 This is a schematic diagram of the structure of the medicine mixing disc in this invention.

[0047] Figure 17 This is a schematic diagram of the drive shaft in this invention.

[0048] Figure 18 In this invention Figure 17 A schematic diagram of the bottom structure.

[0049] In the diagram: 1-Sedimentation tank, 2-Dosing device, 3-Equipment platform, 4-Ladder, 5-Water quality conditioning tank, 6-IC anaerobic reactor, 7-Anaerobic reaction device, 8-Sludge pipe;

[0050] 71-Mixing tank for reagents, 72-Mixing disc for reagents, 73-Drainage pipe, 74-Support, 75-Upper fixed disc, 76-Upper connecting disc, 77-Lower connecting disc, 78-Dispersion fins, 79-Upper toothed disc, 710-C-shaped frame, 711-Lower fixed disc, 712-Lower toothed disc, 713-Locking clamp, 714-Connecting cylinder, 715-Base, 716-Water distributor, 717-Agitator, 718-Drive shaft, 719-Mounting bracket, 720-Cylinder, 721-Guard net, 722-Reset spring, 723-Gear, 724-Rotary motor, 725-Toothed cylinder;

[0051] 7181 - Upper gear shaft section, 7182 - Lower gear shaft section. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see Figures 1 to 18In this embodiment of the invention, a high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater includes an anaerobic reactor 7, which is installed in the first reaction zone of an IC anaerobic reactor 6; the anaerobic reactor 7 is fixed to an equipment platform 3; a ladder 4 is installed on one side of the equipment platform 3; at least one water quality conditioning tank 5 is provided on the equipment platform 3; the IC anaerobic reactor 6 is connected to the water quality conditioning tank 5 through a pipeline.

[0054] The water quality regulating tank 5 is connected to the sedimentation tank 1 via a pipeline; a dosing device 2 is also provided on one side of the sedimentation tank 1.

[0055] As a further explanation of the above embodiments, in combination with the characteristics of water quality and treatment objectives, the purpose of anaerobic treatment of aquaculture wastewater is to remove a large amount of suspended solids (SS), fibrous impurities and solid organic matter (such as livestock and poultry manure and feed residue) from the wastewater, so as to avoid clogging of subsequent equipment or loss of sludge from the anaerobic reactor.

[0056] Pretreatment is carried out by setting up a sedimentation tank 1 with a bar screen filtration function. The coarse bar (5-20mm aperture) intercepts large particles of impurities, and the fine screen (100-200 mesh) filters fibrous materials. The sedimentation tank 1 removes inorganic sand particles and some organic suspended solids by gravity sedimentation, with a retention time of 1-2 hours.

[0057] The settled wastewater is pumped and piped to water quality conditioning tank 5. Then, the chemical dosing device 2 delivers the chemical solution to water quality conditioning tank 5 for water quality adjustment. Water quality conditioning tank 5 is designed for an 8-12 hour capacity and is equipped with a stirring device (mechanical stirring or aeration) to ensure uniform water quality. If the wastewater is acidic (e.g., fermentation wastewater pH < 5), NaOH is added. Increase the alkalinity to 6.5-7.5; if it is too alkaline, add dilute sulfuric acid to adjust.

[0058] After water quality conditioning, the wastewater is transported to the anaerobic reaction device 7 inside the IC anaerobic reactor 6 for further treatment. Meanwhile, the sludge produced in the sedimentation tank 1 is transported to the filter press for treatment via the sludge pipe 8.

[0059] It should be noted that the water treated by the anaerobic reactor 7 enters the IC anaerobic reactor 6. The IC anaerobic reactor 6 works on the same principle as the traditional anaerobic reactor, so its specific principle will not be described in detail.

[0060] The IC anaerobic reactor 6 for wastewater treatment has an anaerobic reaction device 7 added inside the IC anaerobic reactor 6; the anaerobic reaction device 7 has a reagent mixing tank 71 for mixing granular reagents and liquid reagents, and a reagent mixing plate 72 is installed inside the reagent mixing tank 71.

[0061] Several drain pipes 73 are evenly distributed around the perimeter of the drug mixing tank 71, and dispersion fins 78 for emulsifying and dispersing the drug solution are provided below the drug mixing tank 71.

[0062] The drug mixing disc 72 is driven by a toothed cylinder 725, which is mounted on a drive shaft 718. The lower end of the drive shaft 718 extends into a connecting cylinder 714 and is connected to the stirring paddle 717. The lower end of the stirring paddle 717 is rotatably connected to the shaft cylinder in the middle of the base 715 via a bearing.

[0063] The base 715 has a water distributor 716 on its inner bottom side, and a water inlet hole is also provided on one side of the bottom of the base 715.

[0064] As further illustrated by the above embodiments, the IC reactor has a large height-to-diameter ratio (usually 4-8). If the bottom mixing zone relies solely on water distribution and biogas mixing, sludge is prone to deposit at the bottom of the reactor and in dead corners (such as near the water distributor) for low-flow-rate, high-viscosity wastewater (such as high-starch / oil wastewater).

[0065] Sludge deposits can clog water distribution holes and internal circulation downcomers, disrupting the dynamic balance of the internal circulation "biogas boosting - sludge return". In severe cases, this can lead to internal circulation paralysis, a significant decrease in reactor processing capacity, and even require shutdown for cleaning.

[0066] Without stirring, the IC anaerobic processor has a weak buffering capacity against sudden changes in water quality (such as pH or shocks from toxic substances) in aquaculture wastewater. For example, the local accumulation of toxic substances cannot be quickly diluted, which will inhibit sludge activity in a short period of time; pH fluctuations are also difficult to quickly homogenize through mixing. The reactor is prone to problems such as acidification (VFA accumulation) and a sudden drop in biogas production due to shock loads, with long recovery periods, affecting the stability of continuous operation.

[0067] By adopting the above technical solution, when the wastewater regulated by the water quality regulating tank 5 is transported to the base 715 through the inlet hole, the wastewater is swirled with the help of the water distributor 716, and the biogas lift drives the flow of the sludge-water mixture. Subsequently, the wastewater overflows the base 715 and disperses to the surroundings. At this time, the drive shaft 718 drives the stirring paddle 717 to stir. Especially for treating high-viscosity wastewater that is prone to sludge deposition, or for applications requiring extremely high operational stability (continuous production does not allow for shutdowns), the stirring paddle 717 can assist in strengthening the mixing through internal circulation, ensuring that organic matter is fully degraded and improving the overall COD removal rate of the wastewater.

[0068] Please see the appendix Figure 7-15 In this embodiment, the upper end of the drain pipe 73 is connected to a 90-degree connector, which is threadedly connected to the reagent mixing tank 71; when the lower end of the reagent mixing plate 72 is in contact with the bottom side of the reagent mixing tank 71, it can block the water outlet of the 90-degree connector.

[0069] The bottom of the medicine mixing box 71 is fixed with a bracket 74, which is fixed to the upper fixed plate 75 by bolts; the bottom of the upper fixed plate 75 is fixed with an upper connecting plate 76 by bolts, and a lower connecting plate 77 is provided below the upper connecting plate 76.

[0070] The bottom of the upper connecting plate 76 and the top of the lower connecting plate 77 are also provided with sliding grooves; an upper toothed plate 79 is rotatably connected in the sliding groove; the outer periphery of the upper toothed plate 79 is provided with a number of dispersed fins 78 in a ring array and is fixed by screws.

[0071] More specifically, the outer ring array of the upper connecting plate 76 and the lower connecting plate 77 has several C-shaped frames 710; the upper end of the C-shaped frame 710 is fixed to the upper fixed plate 75 by bolts, and the lower end of the C-shaped frame 710 is engaged with the groove on the lower fixed plate 711 and fixed by bolts.

[0072] The upper fixing plate 75 and the lower fixing plate 711 are also fastened with protective nets 721 on their outer sides. The top and bottom of the two protective nets 721 are fixed by locking clamps 713. The protective nets 721 are located on the outer side of the C-shaped frame 710. The upper end of the base 715 is fixed to the connecting cylinder 714 by bolts, and the upper end of the connecting cylinder 714 is fixed to the lower fixing plate 711.

[0073] In addition, anaerobic microbial metabolism requires a suitable carbon-nitrogen-phosphorus ratio (usually C:N:P≈200-300:5:1). If the influent is deficient in nitrogen / phosphorus, it will limit the reproduction and metabolic activity of the microbial community.

[0074] Therefore, it is necessary to add chemicals to the wastewater during anaerobic treatment. Common chemicals include: nitrogen source: ammonium chloride (…). ) or urea (low cost, supplement) );

[0075] The above-mentioned agents are either liquids or particulate solids. In order to ensure that the agents can be fully mixed with wastewater, the particles in the agents need to be emulsified and dispersed to improve the mixing effect with wastewater.

[0076] To this end, we have installed a reagent mixing tank 71. Liquid and granular reagents are placed in the mixing tank 71, and the drive shaft 718 drives the reagent mixing disc 72 to thoroughly mix the reagents. When the reagent mixing disc 72 is lifted by the return spring 722, the liquid reagent is discharged downwards through the drain pipe 73. The upper gear disc 79 drives the dispersing fins 78 to rotate at high speed. A small gap is reserved between the dispersing fins 78 and the C-shaped frame 710. Therefore, when the reagent is moved by the dispersing fins 78, the small gap can shear the particles in the reagent, achieving a better dispersion and emulsification effect when mixed with the liquid reagent. Furthermore, when the dispersing fins 78 move at high speed, the reagent and granular reagent are thrown onto the protective net 721, which also achieves an impact crushing and dispersion effect. This increases the mixing effect of the liquid reagent and wastewater.

[0077] Please see the appendix Figure 17-18 In this embodiment, the lower end of the drive shaft 718 has a lower toothed shaft section 7182, which is inserted into the splined cylinder at the top of the stirring paddle 717.

[0078] The drive shaft 718 is fitted with a lower gear plate 712 at the middle position, and an upper gear shaft section 7181 is also provided at the middle position of the drive shaft 718, which meshes with the gear 723; the gear 723 is fitted on the output shaft of the rotary motor 724; the rotary motor 724 is fixed to the semi-circular plate inside the upper fixed plate 75.

[0079] More specifically, the medicine mixing box 71 has a fixed cylinder protruding upward in the middle, and a return spring 722 is sleeved on the outside of the fixed cylinder;

[0080] The pharmaceutical mixing disc 72 has a convex longitudinal section shaft hole at its axial center position and is sleeved on the fixed cylinder; the return spring 722 is located in the convex shaft hole;

[0081] The top of the drive shaft 718 is connected to the cylinder rod of the cylinder 720 via a rotary connector, and the cylinder 720 is fixed to the top of the medicine mixing tank 71 via a mounting bracket 719. Multiple slots are provided at the bottom of the medicine mixing tray 72 to facilitate the outflow of the medicine liquid; when the medicine mixing tray 72 is lifted by the return spring 722, the medicine liquid passes through the slots and is discharged along the drain pipe 73.

[0082] The upper surface of the fixed cylinder that protrudes upward in the middle of the drug mixing disc 72 is toothed and engages with the teeth at the bottom of the toothed cylinder 725.

[0083] By adopting the above technical solution, under normal conditions, the lower toothed shaft section 7182 at the lower end of the drive shaft 718 is inserted into the splined cylinder at the upper end of the agitator 717. At this time, the lower end of the toothed cylinder 725 meshes with the medicine mixing disc 72, causing the medicine mixing disc 72 to press down on the return spring 722. The medicine mixing disc 72 covers the port of the 90-degree connector around its perimeter. Then, the medicine is poured into the medicine mixing tank 71. The rotary motor 724 drives the drive shaft 718 to rotate at high speed through the meshing of the gear 723 and the upper toothed shaft section 7181. The medicine mixing disc 72 mixes the medicine liquid in the medicine mixing tank 71.

[0084] The 717 agitator can also agitate and treat wastewater during water distribution.

[0085] After the wastewater treatment is completed, the cylinder rod of cylinder 720 retracts, driving the drive shaft 718 to move upward. At this time, the lower toothed shaft section 7182 at the lower end of the drive shaft 718 separates from the agitator 717, and the agitator 717 stops rotating. At the same time, the toothed cylinder 725 separates from the chemical mixing disk 72. The return spring 722 lifts the chemical mixing disk 72, and the liquid medicine passes through the chemical mixing disk 72 and is discharged between the dispersion fins 78 and the C-shaped frame 710 through the 90-degree connector and the drain pipe 73.

[0086] As the drive shaft 718 moves upward, the lower gear disk 712 meshes with the upper gear disk 79, driving the upper gear disk 79 to rotate at high speed. The upper gear disk 79 drives the outer dispersion fins 78 to disperse and emulsify the liquid under the cooperation of the C-shaped frame 710.

[0087] The working principle of this invention is as follows: Under normal conditions, the lower toothed shaft section 7182 at the lower end of the drive shaft 718 is inserted into the splined cylinder at the upper end of the stirring paddle 717. At this time, the lower end of the toothed cylinder 725 meshes with the medicine mixing disc 72, causing the medicine mixing disc 72 to press down on the return spring 722. The medicine mixing disc 72 covers the port of the 90-degree connector around its perimeter. Then, the medicine is poured into the medicine mixing tank 71. The rotary motor 724 drives the drive shaft 718 to rotate at high speed through the meshing of the gear 723 and the upper toothed shaft section 7181. The medicine mixing disc 72 mixes the medicine liquid in the medicine mixing tank 71.

[0088] The 717 agitator can also agitate and treat wastewater during water distribution.

[0089] After the wastewater treatment is completed, the cylinder rod of cylinder 720 retracts, driving the drive shaft 718 to move upward. At this time, the lower toothed shaft section 7182 at the lower end of the drive shaft 718 separates from the agitator 717, and the agitator 717 stops rotating. At the same time, the toothed cylinder 725 separates from the chemical mixing disk 72. The return spring 722 lifts the chemical mixing disk 72, and the liquid medicine passes through the chemical mixing disk 72 and is discharged between the dispersion fins 78 and the C-shaped frame 710 through the 90-degree connector and the drain pipe 73.

[0090] As the drive shaft 718 moves upward, the lower gear disk 712 meshes with the upper gear disk 79, driving the upper gear disk 79 to rotate at high speed. The upper gear disk 79 drives the outer dispersion fins 78 to disperse and emulsify the liquid under the cooperation of the C-shaped frame 710.

[0091] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0092] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater, characterized in that: The IC anaerobic reactor (6) for wastewater treatment is provided, and an anaerobic reaction device (7) is added inside the IC anaerobic reactor (6); the anaerobic reaction device (7) has a reagent mixing tank (71) for mixing granular reagents and liquid reagents, and a reagent mixing plate (72) is installed inside the reagent mixing tank (71). Several drain pipes (73) are evenly distributed around the drug mixing tank (71), and dispersion fins (78) for emulsifying and dispersing the drug solution are provided below the drug mixing tank (71). The mixing disc (72) is driven by a toothed cylinder (725), which is mounted on a drive shaft (718). The lower end of the drive shaft (718) extends into a connecting cylinder (714) and is connected to a stirring paddle (717). The lower end of the stirring paddle (717) is rotatably connected to the shaft cylinder in the middle of the base (715) via a bearing. The base (715) has a water distributor (716) on the bottom side inside, and a water inlet hole is also provided on one side of the bottom of the base (715); The upper end of the drain pipe (73) is connected to a 90-degree connector, which is threaded to the reagent mixing box (71); when the lower end of the reagent mixing plate (72) is in contact with the bottom side of the reagent mixing box (71), it can block the water outlet of the 90-degree connector. The bottom of the medicine mixing box (71) is fixed with a bracket (74), which is fixed to the upper fixed plate (75) by bolts; the bottom of the upper fixed plate (75) is fixed with an upper connecting plate (76) by bolts, and a lower connecting plate (77) is provided below the upper connecting plate (76). The bottom of the upper connecting plate (76) and the top of the lower connecting plate (77) are also provided with a sliding groove; an upper toothed plate (79) is rotatably connected in the sliding groove; the outer periphery of the upper toothed plate (79) is provided with a number of dispersed fins (78) in a ring array and is fixed by screws; The drive shaft (718) is fitted with a lower gear plate (712) at the middle position, and an upper gear shaft section (7181) is also provided at the middle position of the drive shaft (718), which meshes with the gear (723); the gear (723) is fitted on the output shaft of the rotary motor (724); the rotary motor (724) is fixed to the semi-circular plate inside the upper fixed plate (75).

2. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 1, characterized in that: The outer ring array of the upper connecting plate (76) and the lower connecting plate (77) has several C-shaped frames (710); the upper end of the C-shaped frame (710) is fixed to the upper fixed plate (75) by bolts, and the lower end of the C-shaped frame (710) is engaged with the groove on the lower fixed plate (711) and fixed by bolts. The upper fixing plate (75) and the lower fixing plate (711) are also fastened with protective nets (721), and the top and bottom of the two protective nets (721) are fixed by locking clamps (713); the protective nets (721) are located on the outside of the C-shaped frame (710).

3. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 1, characterized in that: The upper end of the base (715) is fixed to the connecting cylinder (714) by bolts, and the upper end of the connecting cylinder (714) is fixed to the lower fixing plate (711).

4. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 1, characterized in that: The drive shaft (718) has a lower toothed shaft section (7182) at its lower end, which is inserted into the splined cylinder at the top of the agitator (717).

5. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 1, characterized in that: The medicine mixing box (71) has a fixed cylinder protruding upward in the middle position, and a return spring (722) is sleeved on the outside of the fixed cylinder. The pharmaceutical mixing disc (72) has a convex longitudinal section shaft hole at its axial center position and is sleeved on the fixed cylinder; the return spring (722) is located in the convex shaft hole; The top of the drive shaft (718) is connected to the cylinder rod of the cylinder (720) via a rotary connector, and the cylinder (720) is fixed to the top of the medicine mixing box (71) via a mounting bracket (719).

6. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 5, characterized in that: Multiple slots are provided at the bottom of the medicine mixing tray (72) to facilitate the outflow of medicine liquid; when the medicine mixing tray (72) is lifted by the reset spring (722), the medicine liquid passes through the slots and is discharged along the drain pipe (73); The upper surface of the fixed cylinder that protrudes upward in the middle of the drug mixing disc (72) is toothed and engages with the teeth at the bottom of the toothed cylinder (725).

7. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 1, characterized in that: The anaerobic reactor (7) is installed in the first reaction zone of the IC anaerobic reactor (6); the anaerobic reactor (7) is fixed to the equipment platform (3); a ladder (4) is installed on one side of the equipment platform (3).

8. The high-efficiency and energy-saving anaerobic treatment system for aquaculture wastewater according to claim 7, characterized in that: The equipment platform (3) is provided with at least one water quality conditioning tank (5); the IC anaerobic reactor (6) is connected to the water quality conditioning tank (5) through a pipeline; The water quality regulating tank (5) is connected to the sedimentation tank (1) by a pipeline; a dosing device (2) is also provided on one side of the sedimentation tank (1).

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