Hydrolysis, acidification and precipitation integrated device

Abstract

The invention provides a hydrolysis-acidification-precipitation integrated device, relates to the technical field of sewage treatment, and solves the technical problems of large occupied area and large investment cost of a hydrolysis-acidification treatment system in the prior art. The hydrolysis-acidification-precipitation integrated device comprises a tank body provided with an inner cavity; the water inlet device is used for conveying sewage needing to be treated to the bottom of the inner cavity of the tank body; the stirring device is used for mixing the activated sludge and the wastewater; the precipitation device is used for separating sludge and sewage, discharging residual sludge and automatically refluxing activated sludge into the hydrolytic acidification reaction area of the tank body; and the water outlet device is used for discharging the treated sewage. The functions of hydrolytic acidification, precipitation, automatic backflow and the like are integrated in one tank body, so that the requirement for an additional precipitation tank is reduced, the occupied area of the system is remarkably reduced, and the system is more suitable for the urban environment with shortage of land resources.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a hydrolysis, acidification and precipitation integrated system and device. Background Art

[0002] In the field of water treatment, traditional hydrolysis and acidification tanks are mainly divided into upflow hydrolysis and acidification tanks and completely mixed hydrolysis and acidification tanks. Upflow hydrolysis and acidification tanks usually require the configuration of a water distribution system and a return system, and their design places special emphasis on the uniformity of the water distribution system and the control of the rising flow rate. However, these requirements have led to challenges in the actual operation of this type of hydrolysis and acidification tank, especially the water distributor is prone to clogging and it is difficult to achieve ideal results in terms of flow rate control. On the other hand, the completely mixed hydrolysis and acidification tank requires the additional configuration of a separate sedimentation tank and a sludge return system, which not only increases the complexity of the system, but also significantly increases the floor space. In addition, the existing sedimentation tank design fails to effectively distinguish between heavy-mass sludge and light-mass sludge, and cannot return the heavy-mass sludge with high biological activity to the hydrolysis and acidification tank alone, thereby failing to improve the efficiency of the hydrolysis and acidification reactor.

[0003] While these existing solutions have addressed the issue of organic matter degradation in wastewater to a certain extent, they also present numerous shortcomings. For upflow hydrolysis and acidification tanks, issues with uniform water distribution and clogging in the water distribution system, along with the requirement for controlled upflow velocity, are key factors limiting their efficiency. While fully mixed hydrolysis and acidification tanks offer some improvements, the need for additional sedimentation tanks and sludge return systems significantly increases the overall system footprint and investment costs, while also increasing system complexity.

[0004] In summary, how to overcome these problems existing in the existing technology and develop a new water treatment technology that can not only reduce the footprint but also reduce investment and operating costs, while also being able to efficiently handle various water quality fluctuations, is an important issue that needs to be solved urgently. Summary of the Invention

[0005] The present invention aims to provide an integrated hydrolysis, acidification, and precipitation device to address the technical problem that existing fully hybrid hydrolysis and acidification tanks require additional sedimentation tanks and sludge return systems, significantly increasing the overall system footprint and investment costs. The various technical benefits achieved by the preferred technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: A hydrolysis, acidification and precipitation integrated device comprising: A tank body, with an inner cavity for carrying activated sludge and sewage to be treated, and the inner cavity is divided into a hydrolysis acidification reaction zone at the lower part and a sedimentation zone at the upper part; An inlet device, connected to the tank body and communicating with the inner cavity of the tank body for conveying sewage to be treated to the bottom of the inner cavity of the tank; A stirring device, installed inside the tank body, for mixing activated sludge and wastewater; A sedimentation device, installed at the upper end inside the tank body for separating mud and water, and recycling and diverting the separated heavy-quality activated sludge to the hydrolysis acidification reaction zone for reuse, and discharging the light-quality activated sludge out of the tank body; An outlet device, installed at the upper part of the sedimentation zone of the tank body for discharging the treated sewage.

[0007] Furthermore, the inlet device includes an inlet pipe fixedly installed on the tank body. The inlet pipe penetrates through the bottom end of the tank body into the inner cavity of the tank and extends along the inner cavity towards its interior. The inlet pipe conveys sewage to be treated from the bottom of the tank body into the interior of the tank.

[0008] Furthermore, the stirring device includes a stirring motor and a spiral blade. The stirring motor is fixedly installed on the top of the tank body. The output shaft of the stirring motor extends along the height direction of the tank body and extends from the top to the bottom. The spiral blade is rotatably arranged at the bottom of the inner cavity of the tank and is fixedly connected to the output shaft of the stirring motor.

[0009] Furthermore, the sedimentation device includes a reflux pipe, a sludge discharge pipe and a sedimentation component: The sedimentation component is circumferentially arranged with the central axis of the tank body as the axis. The sedimentation component is fixedly installed in the middle of the tank body to divide the inner cavity of the tank into a hydrolysis acidification reaction zone in the upper and lower two chambers and a sedimentation zone in the upper part; The sedimentation component is provided with a central through hole for the mixed sewage sludge in the hydrolysis acidification reaction zone to enter the sedimentation zone; The reflux pipe is fixedly installed on the tank body and one end is communicated with the sedimentation zone, and the other end is communicated with the hydrolysis acidification reaction zone for refluxing and discharging the activated sludge into the hydrolysis acidification reaction zone; One end of the sludge discharge pipe is communicated with the sedimentation zone, and the other end is communicated with the outside for discharging the inactivated sludge out of the tank body.

[0010] Furthermore, the sedimentation component includes two sewage hoppers, namely a front-section sewage hopper and a rear-section sewage hopper. The front-section sewage hopper and the rear-section sewage hopper are arranged from the center of the tank body towards its side wall and are connected in sequence. The lateral cross-sections of the two sewage hoppers are arranged in two connected V-shapes. The reflux pipe is communicated with the hydrolysis acidification reaction zone at the bottom end of the front-section sewage hopper, and the sludge discharge pipe is communicated with the outside of the tank at the bottom end of the rear-section sewage hopper.

[0011] Further, the precipitation assembly further includes a draft tube and an exhaust pipe. The exhaust pipe is fixedly installed in the inner cavity of the tank body. One end of the exhaust pipe communicates at the lower cavity corner of the connection point between the front sewage discharge hopper and the rear sewage discharge hopper. The other end of the exhaust pipe communicates with the draft tube to discharge the gas generated during the hydrolysis and acidification process at the connection point between the front sewage discharge hopper and the rear sewage discharge hopper in the hydrolysis and acidification reaction zone.

[0012] Further, the exhaust pipe is inclined, and the end of the exhaust pipe connected to the draft tube is higher than the end of the exhaust pipe at the connection between the front sewage discharge hopper and the rear sewage discharge hopper.

[0013] Further, the precipitation device further includes inclined plates for precipitating the sewage sludge mixture. The inclined plates are fixedly installed on the inner wall of the tank body, and the inclined plates are arranged higher than the precipitation assembly to guide the sludge to flow downward for discharge.

[0014] Further, the water outlet device includes a drain pipe and a weir plate. An outlet weir trough with an opening at the top is formed along the circumferential direction on the inner wall at the upper end of the tank body. The drain pipe is fixedly connected to the outer wall of the tank body and communicates with the outlet weir trough to discharge the wastewater that overflows into the outlet weir trough in the precipitation zone. The weir plate is detachably installed on the outer side wall of the outlet weir trough on the inner wall of the tank body to adjust the height value of the sewage entering the outlet weir trough.

[0015] Further, an ORP on-line instrument arranged in the inner cavity of the tank body, an MLSS on-line instrument arranged in the inner cavity of the tank body, and a pH / temperature on-line instrument arranged in the inner cavity of the tank body (100) are also provided on the tank body.

[0016] The hydrolysis and acidification precipitation integrated device proposed by the present invention aims to overcome multiple limitations in the existing water treatment process and achieve significant technical effects through a series of innovative designs. The following is an elaboration on the main technical effects that this system can achieve: Efficient space utilization Integrated design: By integrating the hydrolysis and acidification functions and the precipitation function in one tank body, the need for an additional sedimentation tank is reduced, thereby significantly reducing the floor area of the entire sewage treatment system. Compared with traditional upflow or completely mixed hydrolysis and acidification ponds, this design is more suitable for urban environments with tight land resources.

[0017] Simplified system structure and operation Reduced equipment complexity: Since there is no need to separately set up a sedimentation tank and a sludge return system, the overall process flow and equipment configuration are simplified, the number and complexity of pipeline connections are reduced, and the maintenance difficulty and operation cost are lowered.

[0018] Energy conservation and emission reduction Reduced energy consumption: The design of using an external pump for sludge reflux is cancelled and replaced with an internal circulation mechanism, reducing energy consumption.

[0019] Optimized sludge collection efficiency: Through an improved sedimentation device, it can effectively distinguish and recover heavy-quality sludge and light-quality sludge, improving sludge collection efficiency, reducing the loss of activated sludge, and further reducing the cost of subsequent treatment.

[0020] Improved treatment efficiency Uniform water distribution and efficient mixing: The inlet device directly conveys sewage to the bottom of the inner cavity of the tank, ensuring uniform water distribution; the stirring device ensures sufficient contact and reaction between the activated sludge and the wastewater, enhancing the pollutant removal rate.

[0021] Maintaining sludge activity: The outlet device discharges the treated sewage, and the sedimentation device discharges the low-activity sludge. Selectively, the activated sludge with more microorganisms is refluxed to the bottom of the inner cavity, maintaining sludge activity and enhancing the continuous treatment capacity of the system.

[0022] In summary, the integrated hydrolysis acidification sedimentation device proposed by the present invention, through its innovative structural design and working principle, realizes reducing the floor area while significantly reducing the investment and operation costs, and can efficiently and stably handle various water quality fluctuations, providing a new solution for modern urban sewage treatment. Brief description of the drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is the overall structural schematic diagram provided by Embodiment 1 of the present invention; Figure 2 is the overall structural schematic diagram provided by Embodiment 2 of the present invention; Figure 3 is the partial structural schematic diagram provided by Embodiment 2 of the present invention.

[0025] Description of the reference numerals: 100, tank body; 110, anoxic zone; 120, aerobic zone; 130, sedimentation zone; 140, ultrasonic electromagnetic flowmeter; 150, DO on-line meter; 160, ORP on-line instrument; 170, MLSS on-line meter; 180, pH / temperature on-line meter; 200, water inlet device; 300, stirring device; 310, stirring motor; 320, spiral blade; 330, stirring blade; 340, draft tube; 350, spiral motor; 360, concentric shaft sleeve; 400, sedimentation device; 410, sludge discharge pipe; 420, front sewage hopper; 430, rear sewage hopper; 440, return pipe; 450, exhaust pipe; 460, inclined plate; 500, water outlet device; 510, weir plate; 520, water outlet weir trough; 530, drain pipe; 600, aeration device; 610, aeration pipe; 620, hoist; 630, support. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0027] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The following is a further detailed description of the present application in conjunction with the attached Figures 1-3 This application embodiment discloses a hydrolysis acidification sedimentation integrated device.

[0030] Example 1 Reference Figure 1 As shown, the present invention provides a hydrolysis acidification precipitation integrated device, which includes a tank body 100, a water inlet device 200, a stirring device 300, a precipitation device 400 and a water outlet device 500. Through its unique design, this system achieves remarkable technical effects such as efficient space utilization, simplified system structure and operation, energy conservation and emission reduction, and improved treatment efficiency.

[0031] Tank body 100: An inner cavity for carrying activated sludge and sewage to be treated is provided inside the tank body 100, and the entire tank body 100 is distributed in the vertical height direction during installation. This design not only optimizes the space utilization efficiency but also enables the system to achieve efficient sewage treatment on a limited land area. Activated sludge that can reproduce itself is injected into the inner cavity of the tank body 100, ensuring the continuous operation ability of the system and the pollutant degradation efficiency.

[0032] Water inlet device 200: The water inlet device 200 is fixedly installed at the bottom of the tank body 100 and conveys sewage into the inner cavity from the bottom of the tank body 100 to undergo hydrolysis acidification reaction with the activated sludge, thereby achieving effective treatment of the sewage. Since the water inlet device 200 directly conveys sewage to the bottom of the inner cavity of the tank body 100, under the action of the stirring device 300, it ensures the uniform distribution of water flow and promotes the full decomposition of organic matter. In addition, there is no need to set up a complex water distribution system additionally, simplifying the equipment complexity and maintenance difficulty.

[0033] Stirring device 300: The stirring device 300 is installed on the tank body 100 and extends downward to the bottom of the tank body 100, capable of stirring the sewage and sludge conveyed into the tank body 100, enhancing their contact, and promoting the occurrence of hydrolysis acidification reaction. The stirring device is frequency conversion speed regulation. By adjusting the working parameters of the stirring device 300, it can flexibly respond to different water quality conditions, improve the overall treatment effect, and save energy consumption. And during the stirring process, the sewage and sludge drive the mixed and stirred sludge to move upward to the upper part of the inner cavity of the tank body 100 by means of lifting and pumping.

[0034] Precipitation device 400: The precipitation device 400 is located in the upper part of the inner cavity of the tank body 100 and works in coordination with the stirring device 300. During the process of discharging the treated sewage, it simultaneously returns the activated activated sludge to the bottom of the inner cavity of the tank body 100. This design not only improves the sludge collection efficiency, reduces the loss of activated sludge, but also maintains the sludge concentration in the reaction zone, enhances the continuous treatment ability of the system, and reduces energy consumption at the same time.

[0035] Water outlet device 500: The water outlet device 500 is arranged in the upper part of the inner cavity of the tank body 100 to discharge the treated sewage.

[0036] Reference Figure 1 As shown, the water inlet device 200 includes a water inlet pipe fixedly connected to the bottom of the tank body 100. This water inlet pipe extends from the side wall of the tank body 100 to the inside of the tank body 100, and its extending direction is parallel to the bottom surface of the inner cavity of the tank body 100. This design not only facilitates the conveyance of sewage into the inner cavity of the tank body 100, but also ensures uniform water flow distribution, reduces the short-circuit phenomenon, and thus optimizes the sewage treatment effect.

[0037] Particularly, the end of the water inlet pipe extends to the center of the bottom inside the tank body 100, which enables the sewage to directly enter the system from the center position at the bottom of the inner cavity. In this way, the sewage can be more efficiently mixed with the sludge in the inner cavity of the tank body 100, significantly improving the reaction efficiency and treatment speed.

[0038] To further enhance the mixing effect, the design of the water inlet pipe also takes into account the control of the water flow direction and speed. By precisely adjusting the angle and layout of the water inlet pipe, the incoming sewage can form a flow pattern conducive to mixing, thereby promoting the degradation process of organic matter. Such a design not only improves the stability and reliability of the system, but also enhances the adaptability to different water quality conditions.

[0039] Reference Figure 1 As shown, the sedimentation device 400 includes a draft tube 340, a reflux pipe 440, a sludge discharge pipe 410, inclined plates 460, and a sedimentation component. The sedimentation component is installed inside the tank body 100. When the inner cavity of the tank body 100 is circular, the sedimentation component is arranged in a circular ring shape with a central through hole, and its outer wall is fixedly connected to the inner wall of the tank body 100. When the inner cavity is rectangular, the sedimentation component is arranged in a rectangular shape and is centrally through-hole, and its outer wall is also fixedly connected to the inner wall of the tank body. The draft tube 340 is fixedly installed on the sedimentation component and is located at the central through hole of the sedimentation component to be fixedly connected to the inner wall of the sedimentation component.

[0040] This layout not only ensures the structural balance, but also effectively divides the inner cavity of the tank body 100 into two independent chambers, namely the hydrolysis acidification reaction zone in the lower part and the sedimentation zone in the upper part. The hydrolysis acidification reaction zone and the sedimentation zone utilize the draft tube 340 to ensure that the sludge can be smoothly sucked to the upper part.

[0041] The sedimentation component is composed of two V-shaped sewage discharge hoppers that are connected and expand outward from the center. When observed from the cross-section in the height direction of the tank body 100, these sewage discharge hoppers form a W shape with the inner side wall of the tank body 100. Specifically, the part close to the center of the tank body 100 is called the front-stage sewage discharge hopper 420, and the part close to the side wall is called the rear-stage sewage discharge hopper 430. This design enables the sludge to naturally stratify according to its characteristics during the flow process, thereby improving the separation efficiency.

[0042] The sludge discharge pipe 410 is fixedly connected to the side wall of the tank body 100 and communicates with the rear sewage discharge hopper 430, and the other end extends to the outside for discharging the inactivated light sludge. At the same time, the reflux pipe 440 is also fixedly connected to the sewage discharge hopper and communicates with the front sewage discharge hopper 420. Through this design, after the muddy water mixture entering the sedimentation device 400 from the sedimentation area through the draft tube 340 is separated, the heavy-quality sludge will preferentially flow into the front sewage discharge hopper 420 during the process of flowing towards the side wall. And the light-quality sludge, due to its light weight and slow sedimentation speed, will enter the rear sewage discharge hopper 430. Since the heavy-quality sludge with high biological activity tends to sink and accumulate at the bottom of the front sewage discharge hopper 420 and finally automatically refluxes into the hydrolysis acidification reaction zone, while the light-quality sludge with low biological activity precipitates in the rear sludge hopper 430 and is finally discharged through the sludge discharge pipe 410.

[0043] In addition, one end of the reflux pipe 440 is connected to the bottom of the front sewage discharge hopper 420 and extends downward to the bottom of the lower chamber. This enables the heavy-quality sludge with high biological activity to return to the bottom of the inner cavity of the tank body 100 again, promoting recycling. Such a system design not only achieves efficient sludge separation, but also significantly reduces maintenance costs and energy consumption, providing a more environmentally friendly and economical solution for the sewage treatment process.

[0044] The sedimentation device 400 further includes a plurality of exhaust pipes 450 provided on the sedimentation assembly, and the plurality of exhaust pipes 450 are uniformly distributed along the circumferential direction of the sedimentation assembly. And the exhaust pipes 450 are inclined, and the inclination angle is between 5 - 10°. That is, one end of the exhaust pipe 450 is connected to the hydrolysis acidification reaction zone and is located at the connection corner of the front sewage discharge hopper 420 and the rear sewage discharge hopper 430, and the other end of the exhaust pipe 450 communicates with the draft tube 340, so as to decompose and discharge some gases such as hydrogen sulfide, methane, ammonia, and carbon dioxide stored at the corner of the sewage discharge hopper.

[0045] The end of the exhaust pipe 450 connected to the hydrolysis acidification reaction zone is lower than the end of the exhaust pipe 450 connected to the draft tube 340.

[0046] The inclined plate 460 is fixedly connected to the inner wall bracket of the tank body 100, and the inclined plate 460 is inclined between the water outlet device 500 and the sewage discharge hopper. When the sewage sludge mixture enters the hydrolysis acidification reaction zone from the draft tube 340, the mixture precipitates on the inclined plate 460, and the precipitated sludge will flow towards the sewage discharge hopper, thereby improving the precipitation effect.

[0047] Refer to Figure 1As shown, the water outlet device 500 includes a drain pipe 530 and a weir plate 510. An annular water outlet weir groove 520 is formed in the inner wall of the upper end of the tank body 100 along its circumferential direction. The opening of the water outlet weir groove 520 is located at the top. The weir plate 510 is detachably connected to the side wall of the tank body, that is, on the inner wall of the water outlet weir groove 520, and the weir plate 510 can be fixedly connected to the inner wall of the tank body by bolts, so that the weir height of the water outlet weir groove 520 can be adjusted in the height direction.

[0048] The drain pipe 530 is fixedly connected to the outer wall of the tank body 100 and is in communication with the water outlet weir groove 520. In this way, after the mud-water mixture enters the upper chamber, the sewage will overflow into the water outlet weir groove 520 and be discharged from the tank body 100 through the drain pipe 530.

[0049] Refer to Figure 1 As shown, the stirring device 300 includes a stirring motor 310 and a spiral blade 320. The stirring motor 310 is fixedly installed on the top of the tank body 100, and its output shaft sequentially passes through the upper chamber, the draft tube 340 and the lower chamber along the height direction of the tank body 100. The spiral blade 320 is fixedly connected to the end of the output shaft of the stirring motor 310, and the spiral blade 320 is driven to stir efficiently by the rotation of the stirring motor 310. This vertically arranged design enables the stirring motor 310 to uniformly stir the materials in the entire tank body 100, ensuring the full mixing of the materials in each layer.

[0050] During the rotation of the spiral blade 320 located in the lower chamber, it can not only effectively stir the sludge and sewage in the lower chamber, but also push the materials at the bottom upward along the spiral blade 320, enter the upper chamber through the draft tube 340, improve the material conveying efficiency, and reduce sediment accumulation. This process not only improves the fluidity of the materials, but also significantly reduces the deposition of bottom sludge, reducing the maintenance frequency and cost.

[0051] It is particularly worth mentioning that the device adopts a mature lifting and stirring technology (this application will not be further disclosed). Through the rotation of the spiral blade 320, the continuous lifting and mixing of the materials are realized, further improving the operation stability and treatment effect of the overall system. In addition, this design can also flexibly adjust the stirring speed according to actual needs to adapt to different types of sludge and sewage treatment requirements.

[0052] An ORP (oxidation-reduction potential) on-line instrument, an MLSS (mixed liquor suspended solids concentration) on-line instrument, and a pH / temperature on-line instrument are also provided on the top of the tank body 100. The sensing ends of these three detection devices all extend deep into the lower chamber to realize the real-time monitoring and control of key water quality parameters.

[0053] ORP On-line Instrument 160: This instrument can accurately measure the oxidation-reduction potential in the lower chamber, thereby providing important information about the oxidation-reduction state of the water body. By continuously monitoring the ORP value, the operator can timely understand the oxidation-reduction balance of the system and adjust the chemical dosage or water inflow accordingly. This not only helps to maintain good treatment conditions but also effectively prevents system failures caused by oxidation-reduction imbalance.

[0054] MLSS On-line Instrument 170: This instrument is used to measure the concentration of mixed liquor suspended solids in the lower chamber, providing a scientific basis for the management of sludge concentration. By real-time monitoring the MLSS value, the system can automatically adjust the return sludge volume or sludge discharge volume to ensure that the concentration of activated sludge in the reaction tank is within the optimal range. In addition, this precise control can also avoid the decline in treatment efficiency caused by too high or too low sludge concentration.

[0055] pH / Temperature On-line Instrument 180: This instrument is used to measure the temperature and pH in the lower chamber, providing the changes in pH and temperature in the hydrolysis acidification reaction zone. By continuously monitoring the temperature and pH, the operator can timely understand the hydrolysis acidification state and process of the system and adjust the caustic liquor dosage accordingly, as well as control the start and stop of the cooling system to ensure that the system is in the best working environment.

[0056] In summary, the hydrolysis acidification and precipitation integrated device proposed by the present invention, through its innovative structural design and working principle, not only solves the problems of large floor area, high energy consumption, and complex operation in traditional sewage treatment systems, but also significantly improves the efficiency and stability of sewage treatment while reducing investment and operating costs.

[0057] Example 2 Compared with Example 1, this example mainly has improvements in the design of the stirring device 300 and the newly added aeration device 600. Specifically: Refer to Figure 2 and Figure 3 as shown, Stirring Device 300: The stirring device 300 in this example not only includes the spiral blade 320 but also adds the stirring blade 330.

[0058] The stirring device 300 also includes a concentric shaft sleeve 360 and a spiral motor 350.

[0059] The stirring blade 330 is fixedly connected to the end of the output shaft of the stirring motor 310 and is specifically used to further stir and mix the sludge sewage in the lower chamber to improve the local mixing efficiency and ensure sufficient reaction.

[0060] The spiral motor 350 is fixedly installed on the top of the tank body 100. The concentric sleeve shaft 360 is sleeved on the output shaft of the stirring motor, and the concentric sleeve shaft 360 is connected to the output shaft of the spiral motor 350, and it can be driven to rotate through structures such as gear transmission or a speed reducer.

[0061] The spiral blade 320 is fixedly installed on the concentric sleeve shaft 360 and is designed to rotate inside the draft tube 340 to optimize the hydrodynamics and improve the mixing uniformity. This layout can effectively enhance the fluidity and turbulence degree of the sludge and sewage inside the draft tube 340, thereby achieving a more efficient stirring effect.

[0062] In addition, through this double-layer stirring structure, the uniformity of the sludge and sewage can be significantly improved, promoting the contact between microorganisms and organic matters, and further improving the overall efficiency of sewage treatment.

[0063] The aeration device 600 in this embodiment includes a hoist 620, a bracket 630 and an aeration assembly. The hoist 620 is fixedly installed on the top of the tank body 100. The bracket 630 is slidably arranged on the inner wall of the tank body 100 and can reciprocate in the lower chamber of the tank body 100. The output end of the hoist 620 is connected to the bracket 630. Driven by the hoist 620, the bracket 630 is driven to move in the up and down direction of the tank body 100 to achieve flexible adjustment and adapt to different treatment requirements.

[0064] Specifically, a through chute is opened on the side wall of the tank body 100. The bracket 630 moves along the height direction of the tank body 100 under the guidance of the chute. Thus, the rope on the output end of the hoist 620 passes through the chute from outside the tank body 100 and is connected to the bracket 630.

[0065] Through the synergistic effect of the chute and the hoist 620, precise position control of the bracket 630 inside the tank body 100 is achieved, ensuring that the aeration pipe 610 can flexibly adjust its working position according to needs to improve the operation accuracy and enhance the system flexibility.

[0066] The aeration assembly includes an aeration pipe 610 and an air compressor. The air compressor is installed outside the tank body 100 (not shown in the drawings). The aeration pipe 610 is fixedly connected along the length direction of the bracket 630 and is communicated with the air compressor. A plurality of aerators are provided on the aeration pipe 610 to distribute gas evenly to ensure sufficient oxygen supply. This design enables the inner cavity of the tank body 100 to be divided into an anoxic zone 110, an aerobic zone 120 and a sedimentation zone 130 from top to bottom during use.

[0067] The application of the modular aeration system enables oxygen to be evenly distributed to each area, improving the activity and reaction efficiency of microorganisms, enhancing the biochemical reaction effect, and improving the water quality purification ability.

[0068] By dynamically adjusting the ratio of the anoxic zone 110 and the aerobic zone 120, the biochemical precipitation integrated pond system with precise split-flow reflux can achieve efficient nitrogen and phosphorus removal, sludge reduction, and low-energy consumption operation, reducing energy consumption and operating costs.

[0069] This embodiment includes three working modes: Mode 1 (fully anoxic mode): The support 630 carries the aeration pipe 610 to the highest position, closes the aeration, and the mixer runs at full speed to strengthen the denitrification process, maximize the denitrification efficiency, and reduce nitrogen pollution.

[0070] Mode 2 (fully aerobic mode): The support 630 carries the aeration pipe 610 to the lowest position, turns on the aeration, closes the stirring, and strengthens nitrification / COD degradation to enhance nitrification and effectively remove organic matter.

[0071] Mode 3 (mixed working mode): Dynamically adjust the ratio of the anoxic / aerobic zone 120 by the support 630 carrying the aeration pipe 610 to flexibly respond to complex water quality changes and ensure the best treatment effect.

[0072] These three modes can be flexibly switched according to the actual water quality situation and treatment requirements to optimize the sewage treatment effect to the greatest extent, improve the system adaptability, and meet diverse treatment requirements.

[0073] The dynamic adjustment function not only enhances the flexibility of the system but also significantly improves the overall treatment efficiency, reduces unnecessary energy consumption and the use of chemical agents, saves energy and reduces consumption, and is environmentally friendly and efficient.

[0074] In this embodiment, there is also provided An ORP (oxidation-reduction potential) on-line instrument extending to the anoxic zone 110: used to monitor the oxidation-reduction state in the anoxic zone 110, ensure that the denitrification reaction proceeds under the best conditions, maintain a suitable oxidation-reduction environment, and promote efficient denitrification.

[0075] An MLSS (mixed liquor suspended solids concentration) on-line instrument extending to the aerobic zone 120: used to measure the suspended solids concentration in the mixed liquor in the aerobic zone 120 in real time, help accurately control the sludge load and aeration volume, optimize sludge management, and improve the treatment efficiency.

[0076] A DO (dissolved oxygen) on-line instrument 150 extending to the aerobic zone 120: used to monitor the dissolved oxygen level in the aerobic zone 120, ensure that microorganisms carry out metabolic activities under suitable oxygen conditions, maintain sufficient dissolved oxygen, and promote efficient nitrification reactions.

[0077] An on-line ultrasonic electromagnetic flowmeter 140 installed in the tank 100: used to accurately measure the reflux flow rate, ensure the stable operation of the system, and provide accurate basic data for subsequent data analysis for accurate flow monitoring and ensure the system stability.

[0078] In summary, through the optimized design of the stirring device 300 and the addition of the aeration device 600, this embodiment not only improves the effect and efficiency of sewage treatment, but also enhances the reliability and adaptability of the system, bringing significant economic and social benefits to users (strengthening the overall performance of the system and improving the user experience). These innovative designs demonstrate how to solve practical problems through engineering technical means, promoting the development and progress of environmental protection technologies.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated hydrolysis acidification and precipitation device, characterized in that Comprising: A tank body (100) with an inner cavity for carrying activated sludge and sewage to be treated, and the inner cavity is divided into a hydrolysis acidification reaction zone at the lower part and a sedimentation zone at the upper part; An inlet device (200) connected to the tank body (100) and communicating with the inner cavity of the tank body (100) for conveying sewage to be treated to the bottom of the inner cavity of the tank body (100); A stirring device (300) installed inside the tank body (100) for mixing activated sludge and wastewater; A sedimentation device (400) installed at the upper end inside the tank body (100) for separating mud and water, and recycling and diverting the separated heavy-quality activated sludge to the hydrolysis acidification reaction zone for reuse, and discharging the light-quality activated sludge out of the tank body; An outlet device (500) installed at the upper part of the sedimentation zone (130) of the tank body (100) for discharging the treated sewage.

2. The integrated hydrolysis acidification and precipitation device according to claim 1, wherein The inlet device (200) includes a water inlet pipe fixedly installed on the tank body (100), the water inlet pipe penetrates through the inner cavity of the tank body (100) from the bottom end of the tank body (100) and extends along the inner cavity to the inside thereof, and the water inlet pipe conveys sewage to be treated from the bottom of the tank body (100) to the inside of the tank body (100).

3. The integrated hydrolysis acidification and precipitation device according to claim 2, characterized in that, The stirring device (300) includes a stirring motor (310), a spiral blade (320) and a draft tube (340), the draft tube (340) is installed inside the tank body, the stirring motor (310) is fixedly installed on the top of the tank body (100), the output shaft of the stirring motor (310) extends along the height direction of the tank body (100) and passes through the draft tube (340) and extends from the top to the bottom thereof, and the spiral blade (320) is rotatably arranged at the bottom of the inner cavity of the tank body (100) and fixedly connected to the output shaft of the stirring motor (310).

4. The integrated hydrolysis acidification and precipitation device according to claim 3, characterized in that The sedimentation device (400) includes a reflux pipe (440), a sludge discharge pipe (410) and a sedimentation component: The sedimentation component is circumferentially arranged with the central axis of the tank body as the axis, and the sedimentation component is fixedly installed in the middle of the tank body (100) to divide the inner cavity of the tank body (100) into a hydrolysis acidification reaction zone with upper and lower two chambers and a sedimentation zone at the upper part; The center of the sedimentation component is provided with a through hole for installing a draft tube (340) so that the mixed sewage sludge in the hydrolysis acidification reaction zone enters the sedimentation zone; The reflux pipe (440) is fixedly installed on the tank body (100) and one end communicates with the sedimentation zone and the other end communicates with the hydrolysis acidification reaction zone for refluxing and discharging the activated sludge into the hydrolysis acidification reaction zone; One end of the sludge discharge pipe (410) communicates with the sedimentation zone and the other end communicates with the outside for discharging the inactivated sludge out of the tank body (100).

5. The integrated hydrolysis acidification and precipitation device according to claim 4, wherein, The sedimentation assembly includes two sewage hoppers, namely a front sewage hopper (420) and a rear sewage hopper (430). The front sewage hopper (420) and the rear sewage hopper (430) are arranged from the center of the tank body (100) to the side wall thereof and are connected in sequence. The side cross-sections of the two sewage hoppers are arranged in two connected V-shaped arrangements. The return pipe (440) is connected to the hydrolysis and acidification reaction zone at the bottom end of the front sewage hopper (420), and the mud discharge pipe (410) is connected to the outside of the tank body at the bottom end of the rear sewage hopper (430).

6. The integrated hydrolysis acidification and precipitation device according to claim 5, characterized in that, The precipitation assembly further includes an exhaust pipe (450) fixedly installed in the inner cavity of the tank body (100), wherein the exhaust pipe (450) is fixedly installed in the inner cavity of the tank body (100), one end of the exhaust pipe (450) is connected to the corner of the lower chamber at the connection point between the front-section sewage hopper (420) and the rear-section sewage hopper (430), and the other end of the exhaust pipe (450) is connected to the guide tube (340) for discharging the gas generated during the hydrolysis and acidification process at the connection point between the front-section sewage hopper (420) and the rear-section sewage hopper (430) in the hydrolysis and acidification reaction zone.

7. The integrated hydrolysis acidification precipitation device according to claim 6, characterized in that The exhaust pipe (450) is arranged at an angle, and one end of the exhaust pipe (450) connected to the guide tube (340) is higher than one end of the exhaust pipe (450) connected to the front section sewage hopper (420) and the rear section sewage hopper (430).

8. The integrated hydrolysis acidification and precipitation device according to claim 7, characterized in that, The sedimentation device (400) further comprises an inclined plate (460) for sedimentation of the sewage sludge mixture, wherein the inclined plate (460) is fixedly mounted on the inner wall of the tank body (100), and the inclined plate (460) is arranged higher than the sedimentation assembly to guide the sludge to flow downward and be discharged.

9. The integrated hydrolysis acidification and precipitation device according to claim 1, characterized in that The water outlet device (500) comprises a drainage pipe (530) and a weir plate (510). The inner wall of the upper end of the tank body (100) is provided with a water outlet weir groove (520) with an opening at the top along its circumferential direction. The drainage pipe (530) is fixedly connected to the outer wall of the tank body and communicated with the water outlet weir groove (520) to discharge wastewater overflowing from the sedimentation area into the water outlet weir groove (520). The weir plate (510) is detachably mounted on the outer side wall of the water outlet weir groove (520) on the inner wall of the tank body (110) to adjust the height value of sewage entering the water outlet weir groove (520).

10. The integrated hydrolysis acidification and precipitation device according to claim 1, characterized in that, The tank body (100) is also provided with an ORP online meter (160) in the inner cavity of the tank body (100), an MLSS online meter (170) in the inner cavity of the tank body (100), and a pH / temperature online meter (180) in the inner cavity of the tank body (100).

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