A coupled sludge reduction device and a method of using the same

Abstract

The application discloses a coupling type sludge reduction device and a use method thereof, and relates to the technical field of sludge treatment, comprising a first treatment tank, a second treatment tank, an ozone gas supply device and an oxygen gas supply device, wherein the first treatment tank and the second treatment tank are of the same structure. In the application, the overflow liquid with a pH value greater than 6.5 is stored through the adjusting mechanism of the first treatment tank, and when the sludge enters the second treatment tank through the sludge transmission mechanism, the overflow liquid is introduced into the fifth connecting pipe by the water pump to improve the pH of the sludge to a suitable range. In combination with the pH sensors in the first treatment tank, the second treatment tank and the conduit for real-time monitoring, the alkaline adjusting agent can be supplemented in time through the liquid adding pipe, so that the ozone oxidation reaction in the first treatment tank and the reaction under the oxygen environment in the second treatment tank are both carried out in the suitable pH range, the problem that the activity of aerobic microorganisms is inhibited due to the excessively high acidity is effectively solved, and the stability of the sludge reduction effect is improved.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a coupled sludge reduction device and its usage method. Background Technology

[0002] Wastewater treatment generates a large amount of sludge. Sludge is composed of various substances, including pathogens and heavy metals. If left untreated, it can easily pollute soil, water, and air. Moreover, raw sludge has a high water content and large volume, making transportation, landfill, and incineration extremely costly. Therefore, it is essential to reduce the volume of sludge generated during wastewater treatment.

[0003] For example, CN102398988B discloses a high-efficiency biochemical treatment device for sludge reduction, including an oxygen tank and an air inlet pipe. One end of a variable frequency high-pressure pump or diaphragm pump is connected to one end of a low-pressure dissolved oxygen inlet pipe, and the other end is connected to a high-pressure dissolved oxygen outlet pipe extending into the pressure tank. A flat nozzle is installed at the end of the high-pressure dissolved oxygen outlet pipe inside the pressure tank. The bottom of the pressure tank is connected to an ejector through an ultra-microbubble dissolved oxygen outlet pipe. The ejector is connected to a biological fluidized bed through a water distribution pipe. A filtration, blocking, or sweeping device is installed on the upper part of the biological fluidized bed. A toothed effluent weir is provided on the upper part of the filtration, blocking, or sweeping device. The toothed effluent weir is connected to a sedimentation tank through an outlet pipe.

[0004] However, in existing technologies, when using a coupled ozone oxidation and aerobic digestion process to reduce sludge volume, the strong oxidizing properties of ozone cause it to react with organic matter and reducing substances in the sludge, generating acidic substances. These acidic substances neutralize the original alkalinity components in the sludge, thus depleting the sludge's alkalinity. If the original sludge alkalinity is insufficient, the rapidly depleted alkalinity cannot neutralize H+. + This directly leads to a sharp drop in the pH of the oxidized sludge. Since aerobic microorganisms are sensitive to the environment, large fluctuations in pH will inhibit the activity of aerobic microorganisms, causing significant fluctuations in sludge degradation efficiency. This makes the volume reduction effect of the coupled process unstable and difficult to achieve the expected results. Summary of the Invention

[0005] The purpose of this invention is to provide a coupled sludge reduction device and its usage method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coupled sludge reduction device, comprising a No. 1 treatment tank, a No. 2 treatment tank, an ozone supply device, and an oxygen supply device. The No. 1 and No. 2 treatment tanks have the same structure, and both No. 1 and No. 2 treatment tanks are equipped with an overflow weir structure at the top. Both are equipped with a mixing mechanism and an air outlet component. The No. 1 and No. 2 treatment tanks are interconnected through a sludge transfer mechanism. The air outlet component inside the No. 1 treatment tank is fixedly connected to the ozone supply device, and the air outlet component inside the No. 2 treatment tank is fixedly connected to the oxygen supply device. Feeding mechanisms are respectively installed on the sides of the No. 1 and No. 2 treatment tanks. An adjustment mechanism is installed on the side of the No. 1 treatment tank. The adjustment mechanism is used to store overflow liquid with a pH value greater than 6.5, and is also used to output overflow liquid into the feeding mechanism on the side of the No. 2 treatment tank. A liquid addition pipe is fixedly connected to the top of the feeding mechanism, and a feeding pipe is fixedly connected to the surface of the feeding mechanism on the side of the No. 1 treatment tank. The liquid addition pipe is externally connected to a chemical supply device.

[0007] The feeding mechanism includes a box, a mixing impeller is rotatably connected inside the box, and a conduit is fixedly connected to the side of the box. A cover is fixedly connected to the end of the conduit. pH sensors are installed inside the No. 1 treatment tank, the No. 2 treatment tank, and the conduit.

[0008] The mixing mechanism includes a bottom stirring component and a middle stirring component. The middle stirring component performs lifting and stirring inside the No. 1 and No. 2 treatment tanks.

[0009] Preferably, the bottom stirring assembly includes a fixed frame, a motor is fixedly connected to the upper part of the fixed frame, a connecting shaft is fixedly connected to the output end of the motor, and a first stirring component is fixedly connected to the bottom of the connecting shaft. The first stirring component is used to stir and scrape the sludge.

[0010] Preferably, the middle stirring assembly includes a fixed plate and a guide rail. The fixed plate is fixedly connected to the connecting shaft, and a telescopic component is fixedly connected to the bottom of the fixed plate. A connecting plate is fixedly connected to the bottom of the telescopic component. The connecting plate is slidably connected to the connecting shaft, and a second stirring component is fixedly connected to the side of the connecting plate. A wedge-shaped guide block is slidably connected inside the guide rail, and a wedge-shaped limiting groove is provided inside the guide rail. The wedge-shaped guide block is located inside the wedge-shaped limiting groove and fits against the guide rail. The wedge-shaped guide block is fixedly connected to the end of the second stirring component.

[0011] Preferably, the telescopic assembly includes a telescopic rod and a spring. One end of the telescopic rod is fixedly connected to a fixed plate, and the other end of the telescopic rod is fixedly connected to a connecting plate. One end of the spring is fixedly connected to the fixed plate, and the other end of the spring is fixedly connected to the connecting plate.

[0012] Preferably, the regulating mechanism includes a storage tank, with a No. 1 connecting pipe installed on the upper part of the storage tank. One end of the No. 1 connecting pipe is fixedly connected to the overflow weir structure of the No. 1 treatment tank, and a No. 2 connecting pipe is fixedly connected to the bottom of the No. 1 connecting pipe. A valve is installed on the surface of the No. 2 connecting pipe, and a water pump is installed on the upper part of the storage tank. One end of the water pump is fixedly connected to a No. 3 connecting pipe, and the end of the No. 3 connecting pipe is fixedly connected to the sludge transfer mechanism.

[0013] Preferably, the sludge transfer mechanism includes a sludge pump, with a No. 4 connecting pipe and a No. 5 connecting pipe installed at the end of the sludge pump. The No. 4 connecting pipe is fixedly connected to the bottom of the No. 1 treatment tank, the No. 5 connecting pipe is fixedly connected to the box on the side of the No. 2 treatment tank, and the end of the No. 3 connecting pipe is fixedly connected to the No. 5 connecting pipe.

[0014] A method for using a coupled sludge reduction device includes the following steps:

[0015] S1. Sludge is introduced into the No. 1 treatment tank through the feed pipe and the feed mechanism on the side of the No. 1 treatment tank. The required treatment agents are added into the tank through the liquid addition pipe. At the same time, ozone is introduced into the No. 1 treatment tank through the ozone supply equipment and the gas outlet assembly.

[0016] S2. Simultaneously, the bottom stirring component and the middle stirring component are driven by the motor to stir the sludge.

[0017] S3. Monitor the pH level of the sludge during the reaction inside the No. 1 treatment tank using a pH sensor;

[0018] S4. When the pH value of the sludge inside the No. 1 treatment tank is lower than 6.0, an alkaline regulator is added into the tank through the liquid addition pipe to quickly adjust the pH value. When the pH value of the sludge inside the No. 1 treatment tank is between 6.0 and 6.5, the sludge that has been treated in the No. 1 treatment tank is normally transferred to the No. 2 treatment tank for further treatment through the sludge transfer mechanism.

[0019] S5. When sludge with a pH value between 6.0 and 6.5 is introduced into the No. 2 treatment tank, the supernatant with a pH value greater than 6.5 stored in the storage tank is introduced into the No. 5 connecting pipe through a water pump to raise the pH value of the sludge to the set range. When the conduit inside the No. 2 treatment tank and the pH sensor inside the No. 2 treatment tank detect that the pH value of the sludge inside the No. 2 treatment tank is abnormal, an alkaline regulator is added into the No. 2 treatment tank through the liquid addition pipe on the upper part of the feeding mechanism on the side of the No. 2 treatment tank.

[0020] S6. Similarly, oxygen is introduced into the No. 2 treatment tank through the oxygen supply equipment and the air outlet assembly, while the sludge inside the No. 2 treatment tank is stirred by the bottom stirring assembly and the middle stirring assembly driven by the motor.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this invention, the overflow liquid with a pH value greater than 6.5 is stored through the adjustment mechanism of the No. 1 treatment tank. When the sludge enters the No. 2 treatment tank through the sludge transfer mechanism, it can be pumped into the No. 5 connecting pipe to raise the pH of the sludge to a suitable range. The mixing impeller in the box of the feeding mechanism initially stirs the agent and sludge introduced through the liquid addition pipe. With the help of the conduit and the cover, the sludge is partially dispersed from the mixing mechanism and then fully stirred by the bottom stirring component and the middle stirring component. Combined with the real-time monitoring of pH sensors in the No. 1 treatment tank, the No. 2 treatment tank and the conduit, the alkaline regulator can be replenished in time through the liquid addition pipe to ensure that the ozone oxidation reaction in the No. 1 treatment tank and the reaction under the oxygen environment in the No. 2 treatment tank are carried out within a suitable pH range. This effectively solves the problem of inhibited aerobic microbial activity caused by excessive acidity and improves the stability of sludge reduction effect.

[0023] 2. In this invention, the first stirring component is driven by a motor-driven connecting shaft to scrape and stir the sludge at the bottom of the tank, preventing sludge deposition. When the second stirring component of the middle stirring component rotates, it uses a wedge-shaped guide block and a wedge-shaped limiting groove to adjust the height through a spring, enhancing the stirring effect of the middle layer of sludge. The storage tank of the adjustment mechanism collects the supernatant with pH > 6.5 overflowing from the first treatment tank through the first connecting pipe and stores it under valve control. When the sludge pump of the sludge transfer mechanism transports the treated sludge to the second treatment tank through the fourth and fifth connecting pipes, the water pump injects the supernatant in the storage tank into the fifth connecting pipe through the third connecting pipe to adjust the sludge pH and reduce the amount of reagent added to the second treatment tank through the liquid addition pipe. This improves the uniformity of stirring, reduces operating costs, and ensures the stable volume reduction effect of the coupled process. Attached Figure Description

[0024] Figure 1 This is a first three-dimensional structural schematic diagram of a coupled sludge reduction device according to the present invention.

[0025] Figure 2 This is a schematic diagram of the second three-dimensional structure of a coupled sludge reduction device according to the present invention.

[0026] Figure 3 This is a schematic diagram of the third three-dimensional structure of a coupled sludge reduction device according to the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the mixing mechanism in a coupled sludge reduction device of the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the wedge-shaped guide block in a coupled sludge reduction device of the present invention;

[0029] Figure 6This is a schematic diagram of the lifting process of the No. 2 stirring component in a coupled sludge reduction device of the present invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the sludge transfer mechanism in a coupled sludge reduction device of the present invention.

[0031] Figure 8 This is a schematic diagram of the internal three-dimensional structure of the box in a coupled sludge reduction device of the present invention;

[0032] Figure 9 This is a flowchart of a coupled sludge reduction device according to the present invention.

[0033] In the diagram: 1. Treatment Pool No. 1; 2. Treatment Pool No. 2; 3. Ozone supply equipment; 4. Oxygen supply equipment; 5. Feeding mechanism; 51. Housing; 52. Conduit; 53. Cover; 54. Mixing impeller; 6. Mixing mechanism; 61. Fixing frame; 62. Motor; 63. Connecting shaft; 64. No. 1 stirring assembly; 65. Guide rail; 66. Wedge-shaped guide block; 67. Fixing plate; 68. Telescopic assembly; 69. Telescopic rod 610. Spring; 611. Connecting plate; 612. No. 2 stirring assembly; 613. Wedge-shaped limiting groove; 7. Adjusting mechanism; 71. Storage tank; 72. No. 1 connecting pipe; 73. No. 2 connecting pipe; 74. Valve; 75. Water pump; 76. No. 3 connecting pipe; 8. Sludge transfer mechanism; 81. Sludge pump; 82. No. 4 connecting pipe; 83. No. 5 connecting pipe; 9. Liquid addition pipe; 10. Feed pipe; 11. Air outlet assembly. Detailed Implementation

[0034] 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 a part of the embodiments of the present invention, and not all of them. 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.

[0035] Example 1: Refer to Figures 1-9The diagram shows a coupled sludge reduction device, comprising a primary treatment tank 1, a secondary treatment tank 2, an ozone supply device 3, and an oxygen supply device 4. The primary treatment tank 1 and secondary treatment tank 2 have identical structures, and both are equipped with overflow weir structures at their upper parts. The primary treatment tank 1 performs ozone oxidation treatment on the sludge, while the secondary treatment tank 2 performs aerobic digestion treatment on the sludge. Both tanks are equipped with a mixing mechanism 6 and an air outlet assembly 11. The primary treatment tank 1 and secondary treatment tank 2 are interconnected via a sludge transfer mechanism 8. The air outlet assembly 11 inside the primary treatment tank 1 is fixedly connected to the ozone supply device 3, and the air outlet assembly 11 inside the secondary treatment tank 2 is fixedly connected to the oxygen supply device 4. Feeding mechanisms 5 are respectively installed on the sides of the primary treatment tank 1 and secondary treatment tank 2. An adjustment mechanism 7 is installed on the side of tank 1. The adjustment mechanism 7 is used to store overflow liquid with a pH value greater than 6.5 and to output overflow liquid to the feeding mechanism 5 on the side of the second treatment tank 2. A liquid addition pipe 9 is fixedly connected to the upper part of the feeding mechanism 5, and a feeding pipe 10 is fixedly connected to the surface of the feeding mechanism 5 on the side of the first treatment tank 1. The liquid addition pipe 9 is connected to a drug supply device. The feeding mechanism 5 includes a box 51. A mixing impeller 54 is rotatably connected inside the box 51, and a conduit 52 is fixedly connected to the side of the box 51. A cover 53 is fixedly connected to the end of the conduit 52. pH sensors are installed inside the first treatment tank 1, the second treatment tank 2, and the conduit 52. The mixing mechanism 6 includes a bottom stirring assembly and a middle stirring assembly. The middle stirring assembly performs lifting and stirring inside the first treatment tank 1 and the second treatment tank 2.

[0036] In this embodiment, sludge is introduced into the No. 1 treatment tank 1 through the feed pipe 10 and the feed mechanism 5 on the side of the No. 1 treatment tank 1. The required treatment agents are added into the tank 51 through the liquid addition pipe 9. Simultaneously, ozone is introduced into the No. 1 treatment tank 1 through the ozone supply device 3 and the gas outlet assembly 11. The sludge is stirred by the bottom stirring assembly and the middle stirring assembly driven by the motor 62. The pH sensor monitors the acidity and alkalinity of the sludge reaction in the No. 1 treatment tank 1. When the pH value of the sludge in the No. 1 treatment tank 1 is lower than 6.0, an alkaline regulator is added into the tank 51 through the liquid addition pipe 9. When the pH value of the sludge in the No. 1 treatment tank 1 is between 6.0 and 6.5, the sludge treated in the No. 1 treatment tank 1 is normally transferred to the second treatment tank 51 through the sludge transfer mechanism 8. The sludge is treated inside the No. 2 treatment tank. When sludge with a pH value between 6.0 and 6.5 is introduced into the No. 2 treatment tank, the supernatant with a pH value greater than 6.5 stored in the storage tank 71 is introduced into the No. 5 connecting pipe 83 by the water pump 75 to raise the pH value of the sludge to the set range. When the conduit 52 inside the No. 2 treatment tank and the pH sensor inside the No. 2 treatment tank detect that the pH value of the sludge inside the No. 2 treatment tank is abnormal, an alkaline regulator is added into the No. 2 treatment tank through the liquid addition pipe 9 on the upper part of the feeding mechanism 5 on the side of the No. 2 treatment tank. Oxygen is introduced into the No. 2 treatment tank through the oxygen supply equipment 4 and the air outlet assembly 11. At the same time, the bottom stirring assembly and the middle stirring assembly are driven by the motor 62 to stir the sludge inside the No. 2 treatment tank.

[0037] As the sludge enters the conduit 52 through the box 51 on the side of the No. 1 treatment tank 1, the mixing impeller 54 inside the box 51 rotates under the flow of the sludge, thus initially mixing and stirring the agent and sludge introduced through the liquid addition pipe 9. The cover 53 has a tubular structure, and there are multiple discharge ports in a ring array at the bottom of the cover 53. The sludge enters the interior of the cover 53 through the conduit 52 and is evenly discharged from the discharge ports at the bottom of the cover 53. It is dispersed to the surrounding area from the connecting shaft 63 in the mixing mechanism 6. At the same time, the mixing mechanism 6 stirs the sludge and the agent, which can quickly and evenly disperse the sludge. Meanwhile, ozone is injected into the interior of the No. 1 treatment tank 1 through the ozone supply device 3 and the gas outlet component 11 inside the No. 1 treatment tank 1 to reduce the volume of the sludge.

[0038] The overflow liquid with a pH value greater than 6.5 is stored by the regulating mechanism 7 of the No. 1 treatment tank. When the sludge enters the No. 2 treatment tank via the sludge transfer mechanism 8, the water pump 75 can pump it into the No. 5 connecting pipe 83 to raise the pH of the sludge to a suitable range. The mixing impeller 54 of the box 51 in the feeding mechanism 5 initially mixes the agent and sludge introduced by the liquid addition pipe 9. With the help of the conduit 52 and the cover 53, the sludge is partially dispersed from the mixing mechanism 6 and then fully mixed by the bottom mixing component and the middle mixing component. Combined with the real-time monitoring of the pH sensors in the No. 1 treatment tank, the No. 2 treatment tank, and the conduit 52, the alkaline regulator can be replenished in time through the liquid addition pipe 9 to ensure that the ozone oxidation reaction in the No. 1 treatment tank and the reaction in the oxygen environment in the No. 2 treatment tank are carried out within a suitable pH range. This effectively solves the problem of inhibited aerobic microbial activity caused by excessive acidity and improves the stability of sludge reduction effect.

[0039] The ozone oxidation treatment process takes place in Treatment Tank 1: sludge is introduced through the feed pipe 10 and the feed mechanism 5 on its side, treatment agents are added through the liquid addition pipe 9, and ozone is introduced through the ozone supply device 3 via the gas outlet component 11. The bottom stirring component 64 and the liftable middle stirring component 612 agitate the sludge to ensure a full reaction between the sludge, ozone, and treatment agents. At the same time, the pH sensor monitors the reaction and the liquid addition pipe 9 replenishes alkaline regulators to achieve sludge oxidation and pretreatment. The regulating mechanism 7 also collects overflow liquid with a pH value greater than 6.5. The aerobic digestion treatment process takes place in Treatment Tank 2: sludge treated in Treatment Tank 1 is received through the sludge transfer mechanism 8, and oxygen is introduced through the oxygen supply device 4 via the gas outlet component 11. Similarly, the sludge is stirred by the mixing mechanism 6, and the pH is adjusted by the liquid addition pipe 9 of the feed mechanism 5 and the overflow liquid delivered by the regulating mechanism 7. Aerobic microorganisms are used to biodegrade the sludge with improved biodegradability after ozone oxidation, completing the subsequent treatment of sludge reduction.

[0040] Example 2: Figures 1-8 As shown, the bottom stirring assembly includes a fixed frame 61, a motor 62 is fixedly connected to the upper part of the fixed frame 61, a connecting shaft 63 is fixedly connected to the output end of the motor 62, and a first stirring component 64 is fixedly connected to the bottom of the connecting shaft 63. The first stirring component 64 is used to stir and scrape the sludge.

[0041] The central stirring assembly includes a fixed plate 67 and a guide rail 65. The fixed plate 67 is fixedly connected to the connecting shaft 63, and a telescopic component 68 is fixedly connected to the bottom of the fixed plate 67. A connecting plate 611 is fixedly connected to the bottom of the telescopic component 68. The connecting plate 611 is slidably connected to the connecting shaft 63, and a second stirring component 612 is fixedly connected to the side of the connecting plate 611. A wedge-shaped guide block 66 is slidably connected inside the guide rail 65, and a wedge-shaped limiting groove 613 is provided inside the guide rail 65. The wedge-shaped guide block 66 is located inside the wedge-shaped limiting groove 613 and fits against the guide rail 65. The wedge-shaped guide block 66 is fixedly connected to the end of the second stirring component 612.

[0042] The telescopic assembly 68 includes a telescopic rod 69 and a spring 610. One end of the telescopic rod 69 is fixedly connected to the fixed plate 67, and the other end of the telescopic rod 69 is fixedly connected to the connecting plate 611. One end of the spring 610 is fixedly connected to the fixed plate 67, and the other end of the spring 610 is fixedly connected to the connecting plate 611.

[0043] The regulating mechanism 7 includes a storage tank 71. A first connecting pipe 72 is installed on the upper part of the storage tank 71. One end of the first connecting pipe 72 is fixedly connected to the overflow weir structure of the first treatment tank 1. A second connecting pipe 73 is fixedly connected to the bottom of the first connecting pipe 72. A valve 74 is installed on the surface of the second connecting pipe 73. A water pump 75 is installed on the upper part of the storage tank 71. One end of the water pump 75 is fixedly connected to a third connecting pipe 76. The end of the third connecting pipe 76 is fixedly connected to the sludge transfer mechanism 8.

[0044] The sludge transfer mechanism 8 includes a sludge pump 81. The sludge pump 81 is equipped with a No. 4 connecting pipe 82 and a No. 5 connecting pipe 83 at its end. The No. 4 connecting pipe 82 is fixedly connected to the bottom of the No. 1 treatment tank 1. The No. 5 connecting pipe 83 is fixedly connected to the box 51 on the side of the No. 2 treatment tank 2. The end of the No. 3 connecting pipe 76 is fixedly connected to the No. 5 connecting pipe 83.

[0045] In this embodiment, when the mixing mechanism 6 is stirring the sludge, the motor 62 drives the connecting shaft 63 and the first stirring component 64 to rotate, thereby scraping and stirring the sludge inside the first treatment tank 1 and the sludge attached to the bottom wall of the first treatment tank 1. At the same time, the fixed plate 67 drives the connecting plate 611 and the second stirring component 612 to rotate, and the second stirring component 612 stirs the sludge in the middle layer of the first treatment tank 1. During the rotation, the second stirring component 612 will generate vertical upward movement when passing through the wedge-shaped limiting groove 613, thereby driving the second stirring component 612 to move upward. When it re-enters the wedge-shaped limiting groove 613, the height of the second stirring component 612 drops back, thus completing the reciprocating motion of the second stirring component 612 with continuous height adjustment during the stirring process.

[0046] The sludge that has been treated inside the No. 1 treatment tank 1 is transferred to the box 51 on the side of the No. 2 treatment tank 2 by the sludge transfer mechanism 8. It then enters the No. 2 treatment tank 2 through the conduit 52 and the cover 53. When it is necessary to add conditioning or treatment agents into the No. 2 treatment tank 2 through the liquid addition pipe 9 on the upper part of the box 51 on the side of the No. 2 treatment tank 2, the sludge is initially mixed by the mixing impeller 54 inside the box 51, and then the mixing mechanism 6 inside the No. 2 treatment tank 2 fully mixes the sludge.

[0047] When the sludge is treated inside the No. 1 treatment tank 1, the supernatant is discharged through the overflow weir structure and the No. 1 connecting pipe 72. When the pH value of the supernatant is greater than 6.5, the valve 74 is opened and the supernatant is injected into the storage tank 71 through the No. 2 connecting pipe 73. When the pH value of the sludge inside the No. 1 treatment tank 1 is within a reasonable range, the pH value of the sludge in the No. 2 treatment tank 2 is adjusted by the supernatant stored in the storage tank 71, which can save the use of chemicals.

[0048] The motor 62 drives the connecting shaft 63 to drive the first stirring component 64 to scrape and stir the sludge at the bottom of the tank, preventing sludge deposition. When the second stirring component 612 of the middle stirring component rotates, it uses the wedge-shaped guide block 66 and the wedge-shaped limiting groove 613 to adjust the height through the spring 610, thereby enhancing the stirring effect of the middle layer of sludge. The storage tank 71 of the regulating mechanism 7 collects the supernatant with pH > 6.5 overflowing from the first treatment tank 1 through the first connecting pipe 72 and stores it through the valve 74. When the sludge pump 81 of the sludge transfer mechanism 8 transports the treated sludge to the second treatment tank 2 through the fourth connecting pipe 82 and the fifth connecting pipe 83, the water pump 75 injects the supernatant in the storage tank 71 into the fifth connecting pipe 83 through the third connecting pipe 76 to adjust the sludge pH and reduce the amount of reagent added to the second treatment tank 2 through the liquid addition pipe 9. This not only improves the uniformity of stirring but also reduces operating costs and ensures the stable volume reduction effect of the coupled process.

[0049] Example 3: Figure 9 As shown, a method of using a coupled sludge reduction device includes the following steps:

[0050] S1. Sludge is introduced into the No. 1 treatment tank 1 through the feed pipe 10 and the feed mechanism 5 on the side of the No. 1 treatment tank 1. The required treatment agent is added into the tank 51 through the liquid addition pipe 9. At the same time, ozone is introduced into the No. 1 treatment tank 1 through the ozone supply device 3 and the gas outlet component 11.

[0051] S2. Simultaneously, the bottom stirring component and the middle stirring component are driven by motor 62 to stir the sludge.

[0052] S3. Monitor the pH level of the sludge during the reaction inside treatment tank 1 using a pH sensor;

[0053] S4. When the pH value of the sludge inside the No. 1 treatment tank 1 is lower than 6.0, an alkaline regulator is added into the tank 51 through the liquid addition pipe 9 to quickly adjust the pH value. When the pH value of the sludge inside the No. 1 treatment tank 1 is between 6.0 and 6.5, the sludge that has been treated inside the No. 1 treatment tank 1 is normally transferred to the No. 2 treatment tank 2 for further treatment through the sludge transfer mechanism 8.

[0054] S5. When sludge with a pH value between 6.0 and 6.5 is introduced into the No. 2 treatment tank 2, the supernatant with a pH value greater than 6.5 stored in the storage tank 71 is introduced into the No. 5 connecting pipe 83 by the water pump 75 to raise the pH value of the sludge to the set range. When the conduit 52 inside the No. 2 treatment tank 2 and the pH sensor inside the No. 2 treatment tank 2 detect that the pH value of the sludge inside the No. 2 treatment tank 2 is abnormal, an alkaline regulator is added into the No. 2 treatment tank 2 through the liquid addition pipe 9 on the upper part of the feeding mechanism 5 on the side of the No. 2 treatment tank 2.

[0055] S6. Similarly, oxygen is introduced into the No. 2 treatment tank 2 through the oxygen supply device 4 and the air outlet component 11, while the bottom stirring component and the middle stirring component are driven by the motor 62 to stir the sludge inside the No. 2 treatment tank 2.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coupled sludge reduction device, comprising a first treatment tank (1), a second treatment tank (2), an ozone supply device (3), and an oxygen supply device (4), wherein the first treatment tank (1) and the second treatment tank (2) have the same structure, and both the first treatment tank (1) and the second treatment tank (2) are provided with an overflow weir structure at the top. The first treatment tank (1) performs ozone oxidation treatment on the sludge, and the second treatment tank (2) performs aerobic digestion treatment on the sludge. Both are equipped with a mixing mechanism (6) and an air outlet component (11). The first treatment tank (1) and the second treatment tank (2) are interconnected by a sludge transfer mechanism (8). The air outlet component (11) inside the first treatment tank (1) is fixedly connected to the ozone supply device (3), and the air outlet component (11) inside the second treatment tank (2) is fixedly connected to the oxygen supply device (4), characterized in that: Both the No. 1 treatment tank (1) and the No. 2 treatment tank (2) are equipped with feeding mechanisms (5) on their sides. The No. 1 treatment tank (1) is equipped with an adjustment mechanism (7) on its side. The adjustment mechanism (7) is used to store overflow liquid with a pH value greater than 6.5 and to output overflow liquid into the feeding mechanism (5) on the side of the No. 2 treatment tank (2). The feeding mechanism (5) is fixedly connected to a liquid addition pipe (9) on its upper part. The feeding mechanism (5) on the side of the No. 1 treatment tank (1) is fixedly connected to a feeding pipe (10). The liquid addition pipe (9) is connected to a drug supply device. The feeding mechanism (5) includes a box (51), a mixing impeller (54) is rotatably connected inside the box (51), and a conduit (52) is fixedly connected to the side of the box (51). A cover (53) is fixedly connected to the end of the conduit (52). A pH sensor is installed inside the No. 1 treatment tank (1), the No. 2 treatment tank (2) and the conduit (52). The mixing mechanism (6) includes a bottom stirring assembly and a middle stirring assembly. The middle stirring assembly performs lifting and stirring inside the No. 1 treatment tank (1) and the No. 2 treatment tank (2). The bottom stirring assembly includes a fixed frame (61), a motor (62) is fixedly connected to the upper part of the fixed frame (61), a connecting shaft (63) is fixedly connected to the output end of the motor (62), and a first stirring assembly (64) is fixedly connected to the bottom of the connecting shaft (63). The first stirring assembly (64) is used to stir and scrape the sludge. The middle stirring assembly includes a fixed plate (67) and a guide rail (65). The fixed plate (67) is fixedly connected to the connecting shaft (63), and a telescopic assembly (68) is fixedly connected to the bottom of the fixed plate (67). A connecting plate (611) is fixedly connected to the bottom of the telescopic assembly (68). The connecting plate (611) is slidably connected to the connecting shaft (63), and a connecting plate (611) is fixedly connected to the side of the connecting plate (611). The second stirring assembly (612) has a wedge-shaped guide block (66) slidably connected inside the guide rail (65), and a wedge-shaped limiting groove (613) is provided inside the guide rail (65). The wedge-shaped guide block (66) is located inside the wedge-shaped limiting groove (613) and fits against the guide rail (65). The wedge-shaped guide block (66) is fixedly connected to the end of the second stirring assembly (612). The telescopic assembly (68) includes a telescopic rod (69) and a spring (610). One end of the telescopic rod (69) is fixedly connected to the fixed plate (67), and the other end of the telescopic rod (69) is fixedly connected to the connecting plate (611). One end of the spring (610) is fixedly connected to the fixed plate (67), and the other end of the spring (610) is fixedly connected to the connecting plate (611). The regulating mechanism (7) includes a storage tank (71), a first connecting pipe (72) is installed on the upper part of the storage tank (71), one end of the first connecting pipe (72) is fixedly connected to the overflow weir structure of the first treatment tank (1), and a second connecting pipe (73) is fixedly connected to the bottom of the first connecting pipe (72). A valve (74) is installed on the surface of the second connecting pipe (73), and a water pump (75) is installed on the upper part of the storage tank (71). A third connecting pipe (76) is fixedly connected to one end of the water pump (75), and the end of the third connecting pipe (76) is fixedly connected to the sludge transfer mechanism (8).

2. The coupled sludge reduction device according to claim 1, characterized in that: The sludge transfer mechanism (8) includes a sludge pump (81), and the ends of the sludge pump (81) are respectively equipped with a No. 4 connecting pipe (82) and a No. 5 connecting pipe (83). The No. 4 connecting pipe (82) is fixedly connected to the bottom of the No. 1 treatment tank (1), the No. 5 connecting pipe (83) is fixedly connected to the box (51) on the side of the No. 2 treatment tank (2), and the end of the No. 3 connecting pipe (76) is fixedly connected to the No. 5 connecting pipe (83).

3. A method of using a coupled sludge reduction device, characterized in that: The coupled sludge reduction device according to any one of claims 1-2 includes the following steps: S1. Sludge is introduced into the No. 1 treatment tank (1) through the feed pipe (10) and the feed mechanism (5) on the side of the No. 1 treatment tank (1). The required treatment agent is added into the tank (51) through the liquid addition pipe (9). At the same time, ozone is introduced into the No. 1 treatment tank (1) through the ozone supply equipment (3) and the gas outlet assembly (11). S2. At the same time, the bottom stirring component and the middle stirring component are driven by the motor (62) to stir the sludge. S3. The pH value of the sludge during the reaction in the No. 1 treatment tank (1) is monitored by a pH sensor. S4. When the pH value of the sludge inside the No. 1 treatment tank (1) is lower than 6.0, an alkaline regulator is added to the tank (51) through the liquid addition pipe (9) to quickly adjust the pH value. When the pH value of the sludge inside the No. 1 treatment tank (1) is between 6.0 and 6.5, the sludge that has been treated inside the No. 1 treatment tank (1) is normally transferred to the No. 2 treatment tank (2) through the sludge transfer mechanism (8) for further treatment. S5. When sludge with a pH value between 6.0 and 6.5 is introduced into the No. 2 treatment tank (2), the supernatant with a pH value greater than 6.5 stored in the storage tank (71) is introduced into the No. 5 connecting pipe (83) by the water pump (75) to raise the pH value of the sludge to the set range. When the conduit (52) inside the No. 2 treatment tank (2) and the pH sensor inside the No. 2 treatment tank (2) itself detect that the pH value of the sludge inside the No. 2 treatment tank (2) is abnormal, an alkaline regulator is added into the No. 2 treatment tank (2) through the liquid addition pipe (9) on the upper part of the feeding mechanism (5) on the side of the No. 2 treatment tank (2). S6. Oxygen is introduced into the No. 2 treatment tank (2) through the oxygen supply equipment (4) and the air outlet assembly (11), and at the same time, the bottom stirring assembly and the middle stirring assembly are driven by the motor (62) to stir the sludge inside the No. 2 treatment tank (2).

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