Intelligent sewage treatment HPB-MBR device

Abstract

The utility model provides an intelligent HPB-MBR (High Phosphorus Blumex-Membrane Bioreactor) device for The sewage treatment device comprises a biochemical pool, a multi-stage rotational flow concentration mechanism and an MBR (Membrane Bioreactor) pool which are communicated in sequence, the biochemical tank comprises an anaerobic tank, an anoxic tank and an aerobic tank which are communicated in sequence. The multi-stage rotational flow concentration mechanism is communicated with the aerobic tank and comprises 2-3 stages of rotational flow concentration mechanisms which are connected in series. And the MBR tank is communicated with an overflow discharge hole of the first-stage cyclone concentrator. And the MBR tank is provided with a backflow pipeline and a drainage pipeline. And the return pipeline is communicated with the aerobic tank. The number of stages of the multi-stage rotational flow concentration mechanism is proper, so that sludge with relatively large specific gravity can be relatively thoroughly separated and flows back to the anoxic tank and / or the aerobic tank through the first reflux. Thus, the flow of the first reflux is relatively small, the concentration of sludge entering the MBR tank is low, the flow of the MBR tank for the second reflux is also small, the energy consumption is reduced, and the degree of influence of the second reflux on dissolved oxygen of the aerobic zone is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sewage membrane treatment, in particular to an intelligent sewage treatment HPB-MBR device. Background Art

[0002] The MBR process, short for Membrane Bio-Reactor (MBR), combines membrane separation technology with traditional biological treatment technology (activated sludge), utilizing membrane modules for solid-liquid separation. This allows for efficient removal of pollutants from wastewater and recycling of clean water. While the MBR process offers advantages such as a smaller footprint and improved effluent quality, it also faces challenges in practical application. Currently, MBR processes are plagued by issues such as membrane fouling, reduced flux, and high investment and operating costs. To address these issues, increasing the MBR tank's return ratio reduces sludge concentration within the tank, thereby improving membrane flux and ensuring sludge concentration distribution. Generally, the return ratio from the MBR tank to the front of the aerobic tank is 4-6, the return ratio from the end of the aerobic tank to the front of the anoxic tank is 2-4, and the return ratio from the end of the anoxic tank to the front of the anaerobic tank is 1-2. Due to the presence of an aeration device in the MBR pool, the return liquid carries a large amount of dissolved oxygen, which can easily cause the dissolved oxygen in the aerobic zone to be too high, thereby destroying the dissolved oxygen environment in the anoxic and anaerobic zones, making it difficult to ensure the water quality and quantity of the effluent.

[0003] There are currently two main technical solutions to this problem. The first is to reduce the sludge concentration entering the MBR tank from the biochemical tank by adding sedimentation tanks such as secondary sedimentation tanks, inclined plate sedimentation tanks, and magnetic coagulation sedimentation tanks. This process adds sedimentation tanks to the existing MBR process, increasing the process footprint and making it difficult to use in projects with scarce land resources. The second is to use mechanical thickening devices to concentrate the activated sludge, thereby reducing the sludge concentration entering the MBR tank. The activated sludge thickening process consumes a lot of energy, which increases the energy consumption of the process. The current solution cannot simultaneously solve the problems of energy consumption and land occupation, and it does not address the damage to the dissolved oxygen environment in the biochemical tank caused by return sludge. Utility Model Content

[0004] The main purpose of this utility model is to provide an intelligent sewage treatment HPB-MBR device to solve the problems that the existing methods cannot solve the problems of energy consumption and land occupation at the same time, and do not solve the technical problem that the dissolved oxygen environment of the biochemical pool is damaged by the return sludge.

[0005] To achieve the above-mentioned purpose, the utility model provides an intelligent sewage treatment HPB-MBR device, which includes a biochemical pool, a multi-stage cyclone concentration mechanism and an MBR pool which are connected in sequence.

[0006] The biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool which are connected in sequence. The biochemical pool has a flowing carrier and an HPB mixed liquid formed based on the carrier.

[0007] The multi-stage cyclone concentrating mechanism is connected to the aerobic tank and includes two to three stages of cyclone concentrating mechanisms arranged in series. Each stage of the cyclone concentrating mechanism includes a cyclone concentrator, an inlet pump located on the water inlet side of the cyclone concentrator, and an outlet pump located on the underflow discharge side of the cyclone concentrator. The underflow discharge side of the cyclone concentrator at any stage is connected to at least one of the anaerobic tank and the anoxic tank to form a first reflux pipeline. The first-stage cyclone concentrator, the second-stage cyclone concentrator, and the third-stage cyclone concentrator are arranged in descending order of distance from the aerobic tank.

[0008] The MBR tank is connected to the overflow outlet of the first-stage cyclone concentrator. The MBR tank has a return pipe and a drainage pipe. The return pipe is connected to the aerobic tank to form a second return pipeline.

[0009] According to an embodiment of the present application, the multi-stage cyclone concentrating mechanism includes three stages of cyclone concentrating mechanisms arranged in series.

[0010] The third-stage cyclone concentrator can regulate whether to perform cyclone concentration.

[0011] According to an embodiment of the present application, the intelligent wastewater treatment HPB-MBR device further includes a bypass pipe directly connected between the second-stage cyclone concentrator and the aerobic tank. The bypass pipe and the third-stage cyclone concentrator are each provided with an inlet valve for controlling whether the third-stage cyclone concentrator performs cyclone concentrating.

[0012] According to an embodiment of the present application, a third return line is further included, one end of the third return line is connected to the MBR tank, and the other end is connected to the anoxic tank. A carrier recovery device is provided on the third return line.

[0013] According to an embodiment of the present application, the first reflux pipeline includes branch pipes respectively connected to the anoxic tank and the anaerobic tank, and the branch pipes are each provided with a valve for adjusting the opening.

[0014] According to an embodiment of the present application, the intelligent sewage treatment HPB-MBR device includes a flow meter for measuring the flow rate on the water inlet side of each stage of the cyclone concentrator.

[0015] According to the embodiment of the present application, the optimal split ratios corresponding to the cyclone concentrators at each stage are completely identical, partially identical, or completely different. The adjustment range of the outflow pump at each stage meets the requirements of the optimal split ratio of the corresponding cyclone concentrator.

[0016] According to an embodiment of the present application, a temperature probe for measuring water temperature is provided in the anaerobic tank.

[0017] According to an embodiment of the present application, a sludge concentration meter is provided on the pipeline connecting the aerobic tank and the multi-stage cyclone concentration mechanism.

[0018] According to the implementation mode of the present application, an intelligent controller is also included, the input end of the intelligent controller is respectively connected to the flow meter, temperature probe, and sludge concentration meter, and the output end of the intelligent controller is respectively connected to the inlet pump and the outlet pump corresponding to each level of cyclone concentration mechanism.

[0019] In the above-mentioned intelligent sewage treatment HPB-MBR device, the activated sludge in the biochemical pool is formed on the carrier, which will form biologically coated heavy sludge particles, greatly improving the sludge sedimentation performance and increasing the concentration efficiency. The multi-stage cyclone concentration mechanism has an appropriate number of stages, and at a lower power, the sludge with a larger specific gravity can be separated more thoroughly and returned to the anoxic tank and / or aerobic tank through the first return. In this way, the flow rate of the first return is relatively small, and the sludge concentration entering the MBR pool is low, and the flow rate of the second return of the MBR pool is also small. Therefore, the overall return flow of the sewage treatment device is relatively low, which reduces energy consumption, and the second return flow has a reduced impact on the dissolved oxygen in the aerobic zone. In addition, the volume of the cyclone concentration mechanism is also small, and the process occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 It is a structural diagram of an intelligent sewage treatment HPB-MBR device according to one embodiment of the present application.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0026] Moreover, the technical solutions between the various embodiments of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] After extensive research, the applicant discovered that the activated sludge process has low treatment efficiency. By combining it with membrane modules, the sludge concentration can be controlled at a high level (10-15 g / L), thereby increasing biomass and enhancing pollutant removal efficiency. However, high-concentration activated sludge entering the membrane tank leads to increased membrane fouling, decreased flux, and poor impact resistance. To address these issues, engineering practices often employ methods such as increasing the membrane tank's return ratio and increasing the aeration rate to maintain stable water production. These methods not only significantly increase process energy consumption, but also carry a large amount of dissolved oxygen in the return fluid, which can damage the anoxic and anaerobic zones and make it difficult to guarantee effluent quality.

[0028] Based on this, the utility model provides an intelligent sewage treatment HPB-MBR device, see Figure 1 , including a biochemical pool, a multi-stage cyclone concentration mechanism 4 and an MBR pool 5.

[0029] The biochemical pool, the multi-stage cyclone concentrating mechanism 4 and the MBR pool 5 are connected in sequence, such as through pipelines. There are no specific requirements for the pipeline parameters at different positions, such as diameter and material, which can be selected according to design requirements.

[0030] The biochemical pool includes an anaerobic pool 1, an anoxic pool 2 and an aerobic pool 3 which are connected in sequence. The biochemical pool has a flowing carrier and an HPB mixed liquid formed based on the carrier.

[0031] This biochemical pool utilizes the HPB process, or High Concentration Powder Carrier Bio-fluidized Bed (HCPB). Specifically, powder carriers are added to the biochemical pool to increase the concentration of the mixed liquor. This simultaneously creates a "dual-sludge" symbiotic microbial system with both suspended and attached growth, allowing for solid-liquid separation in the secondary sedimentation tank. The powder carriers are recovered and recycled from the discharged excess sludge, achieving a dual-sludge age. This overcomes the inherent limitations of the denitrification and phosphorus removal bacteria's iterative cycles and simultaneously enhances the effectiveness of biological denitrification and phosphorus removal.

[0032] The multi-stage cyclone concentrating mechanism 4 is connected to the aerobic tank 3 (illustratively, a delivery pump 8 is provided in the pipeline between the two). The multi-stage cyclone concentrating mechanism 4 includes two to three stages of cyclone concentrating mechanisms arranged in series. Each stage of the cyclone concentrating mechanism includes a cyclone concentrator, an inlet pump located on the water inlet side of the cyclone concentrator, and an outlet pump located on the underflow discharge side of the cyclone concentrator. The underflow discharge side of the cyclone concentrator at each stage is connected to at least one of the anaerobic tank 1 and the anoxic tank 2 to form a first return pipeline. Among them, the adjustment range of each stage of the inlet pump meets the requirements of the inlet flow rate. The inlet flow rate of the first-stage cyclone concentrator is in the range of 0.5m / s~1.5m / s, the inlet flow rate of the second-stage cyclone concentrator is in the range of 1.5~3.0m / s, and the inlet flow rate of the third-stage cyclone concentrator is in the range of 2.5~5m / s. The first-stage cyclone concentrator, the second-stage cyclone concentrator and the third-stage cyclone concentrator are arranged in sequence from far to near according to the distance from the aerobic tank 3.

[0033] The multi-stage cyclone concentrating mechanism 4 is connected to the biochemical pool and the MBR pool 5 via pipelines, and the structures inside the multi-stage cyclone concentrating mechanism 4 are also connected via pipelines. For example, each stage of the cyclone concentrating mechanism is also connected to the adjacent stage of the cyclone concentrating mechanism via pipelines.

[0034] Each cyclone concentrating mechanism includes a cyclone concentrator, an inlet pump, and an outlet pump. For example, the first cyclone concentrating mechanism includes a corresponding first inlet pump 9 and a first outlet pump 11. The second cyclone concentrating mechanism includes a corresponding second inlet pump 17 and a second outlet pump 18. The third cyclone concentrating mechanism includes a corresponding third inlet pump 8 and a third outlet pump 10.

[0035] A cyclone has an underflow port, an overflow port, and an inlet. The inlet is typically designed as a tangentially directed pipe, used to introduce the fluid to be separated into the cyclone at a specific pressure and velocity. This tangential entry generates a strong rotational motion, which helps separate the fluids. The overflow port is typically located at the top of the cyclone and is used to discharge the light mixed liquid (also called the first mixed liquid) after screening. The underflow port is located at the bottom of the cyclone and is used to discharge the heavy mixed liquid (also called the second mixed liquid) after screening.

[0036] The cyclone's underflow, overflow, and inlet are all connected to other structures via pipelines. In any two adjacent cyclone concentrating mechanisms connected in series, the inlet of the subsequent cyclone concentrator communicates with the overflow of the preceding cyclone concentrator. Therefore, the inlet pump for each cyclone concentrating mechanism is installed in a pipeline connected to the inlet. Similarly, the outlet pump for each cyclone concentrating mechanism is installed in a pipeline connected to the underflow.

[0037] The inlet pump can adjust the inlet flow rate of the corresponding cyclone concentrator. For example, the inlet flow rate of the first-stage cyclone concentrator is adjustable from 0.5m / s to 1.5m / s, the inlet flow rate of the second-stage cyclone concentrator is adjustable from 1.5m / s to 3.0m / s, and the inlet flow rate of the third-stage cyclone concentrator is adjustable from 2.5m / s to 5m / s. Because the corresponding pipeline diameter of the cyclone concentrator is fixed, the inlet pump can actually directly adjust the inlet flow rate of the cyclone concentrator.

[0038] The split ratio of a cyclone concentrator is a crucial parameter that influences its separation efficiency and performance. The split ratio refers to the volume ratio between the overflow from the overflow port and the underflow from the underflow port. Similarly, the outflow pump can adjust the underflow velocity, thereby adjusting the underflow rate and, consequently, the split ratio of the cyclone concentrator. The purpose of the outflow pump is to operate the cyclone concentrator at the split ratio that maximizes separation efficiency and performance.

[0039] For example, in a cyclone concentrator, separation efficiency and performance are highest when the split ratio is 1:1. However, if the cyclone concentrator does not have an outflow pump and the inflow pump only adjusts its flow rate from 0.4 m / s to 0.8 m / s, the split ratio of the cyclone concentrator will actually change. Therefore, the outflow pump needs to be linked to the inflow pump to double the underflow flow rate, thereby maintaining the split ratio at 1:1.

[0040] The bottom flow outlet of each stage of the cyclone concentrator is connected to at least one of the anaerobic tank 1 and the anoxic tank 2 through a pipeline to form a first reflux pipeline. The first reflux pipeline is used for the first reflux. The first reflux R can be understood as the reflux operation of the material flowing out of the bottom flow outlet of all cyclone concentrators. Figure 1The reflux ratio of the first reflux R is 4 to 8. When two-stage cyclone concentrating mechanisms are used for cyclone concentration, that is, two-stage concentration reflux is performed, and the reflux ratio of the first reflux is 2.5. When three-stage cyclone concentrating mechanisms are used for cyclone concentration, that is, three-stage concentration reflux is performed, and the reflux ratio of the first reflux is 5.5.

[0041] In the cyclone concentrator, the carriers added during the HPB process mature into bio-encapsulated heavy sludge particles, significantly improving sludge settling performance and increasing concentration efficiency. Consequently, the material outflow from the underflow is higher in concentration and correspondingly smaller in volume, resulting in a smaller return flow in the first reflux. After multiple stages of cyclone concentrating in series, the sludge concentration entering MBR tank 5 is also significantly reduced.

[0042] The MBR tank 5 is connected to the overflow outlet of the first-stage cyclone concentrator. The MBR tank 5 has a return line and a drainage line. The return line (illustratively, a second return pump 12 is provided on the return line) is connected to the aerobic tank 3, forming a second return line. This second return line is used for secondary reflux.

[0043] Since the sludge concentration entering the MBR tank 5 is relatively low, the MBR tank 5 only needs to have a relatively low return flow rate to achieve the ideal concentration required for the operation of the MBR tank 5, that is, the designed sludge concentration value of the MBR tank 5. Figure 1 , it can be seen that the reflux rate of the second reflux r is small. No matter whether the two-stage cyclone concentrating mechanism or the three-stage cyclone concentrating mechanism performs cyclone concentration, the reflux ratio of the second reflux r is less than or equal to 1.

[0044] The sum of the first reflux R and the second reflux r is the overall reflux rate. The overall reflux rate is significantly reduced. Under the same standard, the overall reflux ratio of the process is lower than that of a simple MBR process.

[0045] The following is a flowchart to illustrate the working principle of the intelligent sewage treatment HPB-MBR device. Figure 1 In some embodiments, the intelligent sewage treatment HPB-MBR device includes: an anaerobic tank 1, an anoxic tank 2, an aerobic tank 3, a carrier dosing device 7, a multi-stage cyclone concentration mechanism 4, an MBR tank 5, and a carrier recovery device 6.

[0046] After sand removal, the wastewater enters the biochemical system through the distribution channel and enters the anaerobic tank 1, aerobic tank 3, and anoxic tank 2 in sequence. The fully reacted muddy water mixture enters the multi-stage cyclone concentrating mechanism 4. After the muddy water mixture is gradually concentrated by the multi-stage cyclone concentrating mechanism 4, the low-concentration mixed liquid eventually enters the MBR tank 5, and the high-concentration return liquid returns to the front end of the anaerobic tank 1 and anoxic tank 2.

[0047] In some embodiments, a third reflux line is further included, one end of which is connected to the MBR tank 5 and the other end is connected to the anoxic tank 2. The third reflux line is provided with a carrier recovery device 6. The third reflux line is used for the third reflux.

[0048] In this way, the mixed liquor in the MBR tank 5 is filtered through the membrane and discharged. A portion of the filtered sludge flows back to the front end of the aerobic tank 3, while the remaining portion enters the carrier recovery device 6 for carrier recovery. After passing through the carrier recovery device 6, the carrier-rich sludge at the lower outlet is returned to the front end of the anoxic tank 2 via the first reflux pump 13, while the sludge at the upper outlet is discharged for disposal. The carrier recovery device 6 reduces sludge discharge and fully utilizes the activated sludge.

[0049] The carrier dosing device 7 adds the hydrophilic carrier to the aerobic tank 3, and the maturation time of the carrier is about 2 weeks. The carrier maturity sign is the formation of heavy sludge particles with biological coating on the surface. At this time, the heavy sludge particles enter the multi-stage cyclone concentration mechanism 4, and the concentration efficiency is greatly improved. The number of concentration stages can be calculated by the following iterative method. After calculation, when the number of concentration stages is greater than 3, the reflux ratio R is greater than 10, and the economic benefit is low. The number of concentration stages can be selected as two or three. The surface of the carrier is wrapped by a biofilm, and no scratches will be generated when the sludge enters the MBR tank 5. After multi-stage concentration, the sludge concentration entering the MBR tank 5 is reduced, and the membrane flux is increased.

[0050] See also Figure 1 , the specific calculation process is as follows:

[0051] in: : Design value of inlet and outlet water, C is the design sludge concentration of MBR pool, g / L;

[0052] : The flow rate from the aerobic pool to the concentration pool is 6~9 , m 3 / d;

[0053] : The flow rate of the concentration unit into the MBR pool is 4~8 , m 3 / d;

[0054] : i is the number of concentration stages, and the last stage flow rate is ,and =(1+ r ) ;

[0055] : MBR pool return ratio ≤1;

[0056] : Reflux ratio of concentration unit;

[0057] : sludge concentration of MBR pool, design value, g / L;

[0058] : anaerobic tank sludge concentration, g / L;

[0059] : Anoxic tank sludge concentration, g / L;

[0060] : aerobic tank sludge concentration, g / L;

[0061] : turbidity in influent, g / L;

[0062] : i is the number of concentration stages, and the sludge concentration of the last stage is ,and , g / L;

[0063] The frequency conversion of the lower pump of the multi-stage cyclone concentrating mechanism 4 is used to achieve a stable reflux ratio, thereby ensuring the concentration effect of each stage of the multi-stage cyclone concentrating mechanism 4. The specific method is as follows:

[0064] When the water inlet volume changes, the inlet flow rate of each level of concentrate can be obtained through the flow meter, and the inlet tangential velocity of each level of concentrate can be calculated. The calculation method is to divide the inlet flow rate by the cross-sectional area of ​​the water inlet pipe. The inlet tangential velocity range of each level of concentrate is:

[0065] The range of the first-stage concentrated water inlet flow rate is 0.5m / s~1.5m / s, the second-stage concentrated water inlet flow rate is 1.5~3.0m / s, and the third-stage concentrated water inlet flow rate is 2.5~5m / s. The flow value of the lower outlet of each stage of the concentrated water can be calculated by the inlet flow rate and split ratio of each stage of the concentrated water. The calculation method is lower outlet flow rate = Inlet flow, where kn is the concentration ratio of the stage. The lower outlet variable frequency pump adjusts the lower outlet flow through frequency conversion.

[0066] The calculation method of the multi-stage cyclone concentration mechanism adopts the iterative method. The specific calculation method is: when the number of concentration stages is one, the flow ratio of the lower port to the upper port is set to The sludge concentration at the lower outlet is greater than that at the upper outlet. According to the law of flow conservation, the inlet flow of the first-stage concentration = outlet flow + reflux flow, and the outlet flow is , then the flow rate at the lower port is , the import flow is According to the conservation of materials, the imported materials = exported materials + return materials, and the exported materials are , the lower material is , then the imported materials are The material and flow distribution from the second level to the nth level can be calculated in sequence.

[0067] The above-mentioned intelligent sewage treatment HPB-MBR device mainly includes the following two improvements:

[0068] 1. Construction of heavy sludge system

[0069] HPB technology is used to build a heavy sludge system, and the sludge density is reduced from 1.04 to 1.07 g / cm 3 Increased to 1.14~1.19 g / cm 3 , the treatment efficiency is improved, and the concentration performance is improved by 2 to 4 times compared with the activated sludge method.

[0070] 2. Construction of multi-stage concentration system

[0071] Multi-stage concentrating cyclones are used to maintain the sludge concentration in the biochemical section (10~15 g / L), improve the treatment efficiency of the biochemical system, and at the same time reduce the sludge concentration entering the membrane pool (3.0~7.5 g / L), thereby effectively controlling the reflow ratio and aeration air volume, stabilizing the water production, and giving full play to the MBR process's role in efficiently treating water.

[0072] In the above-mentioned intelligent sewage treatment HPB-MBR device, the activated sludge in the biochemical pool is formed on the carrier, and biologically coated heavy sludge particles are formed, which greatly improves the sludge sedimentation performance and increases the concentration efficiency. The multi-stage cyclone concentration mechanism 4 has an appropriate number of stages, and at a relatively low power, the sludge with a larger specific gravity can be separated more thoroughly and returned to the anoxic tank 2 and / or the aerobic tank 3 through the first return. In this way, the flow rate of the first return is relatively small, and the sludge concentration entering the MBR pool 5 is low, and the flow rate of the second return of the MBR pool 5 is also small. Therefore, the overall return flow of the sewage treatment device is relatively low, which reduces energy consumption, and the second return flow has a reduced impact on the dissolved oxygen in the aerobic zone. In addition, the volume of the cyclone concentration mechanism is also small, and the process occupies a small area.

[0073] In some embodiments, the multi-stage cyclone concentrating mechanism 4 includes three stages of cyclone concentrating mechanisms arranged in series.

[0074] The third-stage cyclone concentrator can be controlled to perform cyclone concentration. Based on the above analysis, the number of concentration stages can be selected as two or three. Therefore, when three-stage concentration is required, the third-stage cyclone concentrator can be controlled to perform cyclone concentration, thereby performing three-stage concentration. When two-stage concentration is required, the third-stage cyclone concentrator can be controlled not to perform cyclone concentration, thereby performing two-stage concentration. Compared with two-stage concentration, three-stage concentration has a larger reflux ratio and higher energy consumption. This design can be adjusted as needed, so that the sewage treatment plant operates with the appropriate number of concentration stages.

[0075] In some embodiments, the sewage treatment device further includes a bypass pipe that directly connects the second-stage cyclone concentrator to the aerobic tank 3. The bypass pipe and the third-stage cyclone concentrator are each equipped with an inlet valve to control whether the third-stage cyclone concentrator performs cyclone concentrating. This approach provides a simple structural design and easy adjustment.

[0076] In some embodiments, the sewage treatment device includes a flow meter for measuring the flow rate at the water inlet side of each stage of the cyclone concentrator. This design facilitates detection of the water inlet flow rate of each stage of the cyclone concentrator, thereby facilitating regulation as needed.

[0077] In some embodiments, the optimal split ratios corresponding to the cyclone concentrators at each stage are completely identical, partially identical, or completely different. The adjustment range of the outflow pump at each stage satisfies the requirements for the optimal split ratio of the corresponding cyclone concentrator.

[0078] The optimal split ratio corresponding to each stage of the cyclone concentrator is the split ratio corresponding to the optimal separation efficiency and performance of the cyclone concentrator. The specifications of the cyclone concentrators at each stage can be completely the same, partially the same, or completely different.

[0079] In some embodiments, the multi-stage cyclone concentrating mechanism 4 includes three stages of cyclone concentrating mechanisms arranged in series. The third stage cyclone concentrator can control whether to perform cyclone concentration, thereby adjusting the number of stages of cyclone concentration.

[0080] In some embodiments, a sludge concentration meter is provided on the pipeline connecting the aerobic tank and the multi-stage cyclone concentration mechanism.

[0081] Use a sludge concentration meter such as the SV-N intelligent observation system to measure the sludge SV30 in the effluent from the aerobic tank 3 to guide the adjustment of the concentration stage.

[0082] For example, when 50%≤SV30 of the sludge in the effluent of the aerobic tank 3<80%, two-stage concentration is performed; when 80%≤SV30 of the sludge in the effluent of the aerobic tank 3<95%, three-stage concentration is performed.

[0083] For example, when 80%≤SV30<95%, the control is to close the overrunning pipe electric valve (16), and the concentration unit is operated at the third level. The SV30 value is obtained through online detection by the SV-N intelligent observation system, and the water temperature data is obtained by the online temperature probe.

[0084] For example, when 80%≤SV30<95%, the control opens the overrunning pipe electric valve (16), and the concentration unit operates in the second stage. The SV30 value is obtained through online detection by the SV-N intelligent observation system, and the water temperature data is obtained by the online temperature probe.

[0085] In some embodiments, the anaerobic tank has a temperature probe for measuring water temperature.

[0086] Water temperature affects sludge viscosity and settling properties. Generally speaking, lower water temperatures lead to higher sludge viscosity, poorer settling properties, and reduced concentration efficiency, thus requiring a three-stage concentration process. Similarly, higher water temperatures reduce sludge viscosity and improve settling properties, necessitating a two-stage concentration process. Therefore, the number of concentration stages should be adjusted based on the temperature.

[0087] For example, when the water temperature in the aerobic pool 3 is lower than 18° C., the third stage concentration is performed; and when the water temperature in the aerobic pool 3 is higher than 18° C., the second stage concentration is performed.

[0088] For example, when the water temperature is less than 18 degrees Celsius, the control is to close the overrunning pipe electric valve (16), and the concentration unit is operated in the third stage.

[0089] As another example, when the water temperature is greater than 18 degrees Celsius, the control is to open the overrunning pipe electric valve (16), and at this time the concentration unit operates in the second stage.

[0090] In some embodiments, the first return line is connected to both the anoxic tank 2 and the anaerobic tank 1. When the influent TN load of the sewage to be treated is 0.8 to 1.0 times the design value, the proportion of the first return flow entering the anoxic tank 2 is reduced. When the influent TN load of the sewage to be treated is 1.0 to 1.2 times the design value, the proportion of the first return flow entering the anoxic tank 2 is increased.

[0091] In some specific embodiments, the first reflux pipeline includes branch pipes respectively connected to the anoxic tank 2 and the anaerobic tank 1 , and the branch pipes are each provided with a valve for adjusting the opening.

[0092] In the case where only the change of the influent TN load is considered, but the change of the influent TP load is not considered. Figure 1The first reflux enters the anoxic tank 2 and the anaerobic tank 1 through the first reflux pipeline. The pipeline has at least one valve, which adjusts the proportion of the first reflux in the anoxic tank 2 and the anaerobic tank 1. The two branches of the first reflux pipeline each have a valve. Among them, the branch connected to the anoxic tank 2 has a first valve 15. The branch connected to the anaerobic tank 1 has a second valve 14. The first valve 15 and the second valve 14 work together to adjust the proportion of the first reflux entering the anoxic tank 2. Compared with a single valve that only adjusts the flow of one of the branches, the dual valve adjustment method of this embodiment is more flexible and precise.

[0093] In some embodiments, the first return flow simultaneously connects the anoxic tank 2 and the anaerobic tank 1. When the influent TP load of the sewage to be treated is 0.8 to 1.0 times the design value, the proportion of the first return flow entering the anoxic tank 2 is increased. When the influent TP load of the sewage to be treated is 1.0 to 1.2 times the design value, the proportion of the first return flow entering the anoxic tank 2 is reduced.

[0094] In this case, only the change of the inlet TP load is considered, without considering the change of the inlet TN load. Figure 1 The first return flow enters the anoxic tank 2 and the anaerobic tank 1 through a pipeline. The pipeline has at least one valve to adjust the proportion of the first return flow in the anoxic tank 2 and the anaerobic tank 1. For example, a valve (a first valve 15 connected to the anoxic tank 2 and a second valve 14 connected to the anaerobic tank 1) is provided to adjust the proportion of the first return flow entering the anoxic tank 2.

[0095] In some embodiments, if the influent TN load and the influent TP load simultaneously increase, the influent flow rate may be reduced, thereby reducing the TN load and TP load in the biochemical pond.

[0096] In some embodiments, an intelligent controller is also included, the input end of the intelligent controller is respectively connected to the flow meter, temperature probe, and sludge concentration meter, and the output end of the intelligent controller is respectively connected to the inlet pump and outlet pump corresponding to each level of cyclone concentration mechanism.

[0097] The intelligent sewage treatment HPB-MBR device also includes an intelligent controller, the control end of which is respectively connected to the cyclone concentrating mechanisms at each level, and is used to adjust the split ratio of the cyclone concentrating mechanisms at each level through the corresponding inlet pump and the corresponding outlet pump to obtain the corresponding optimal concentration efficiency.

[0098] For example, the control end of the intelligent controller is respectively connected to the inlet pump and the outlet pump corresponding to each level of the cyclone concentration mechanism to control the flow rate of the inlet pump and the outlet pump, thereby controlling the split ratio.

[0099] In general, the intelligent sewage treatment HPB-MBR device has the following advantages:

[0100] Advantage 1: The heavy sludge system is constructed by adding hydrophilic carriers, which reduces the damage of the carriers to the membrane and improves the concentration efficiency.

[0101] Advantage 2: Different from the method of increasing the return ratio of MBR tank 5 to return a large amount of high dissolved oxygen sludge to the aerobic tank 3 or the anoxic tank 2, the return ratio of MBR tank 5 in this patent is r≤1, which will not destroy the dissolved oxygen environment in the anaerobic tank 1 and the anoxic tank 2.

[0102] Advantage 3: Compared with the sedimentation tank + MBR process, this process occupies a smaller area and has higher concentration efficiency.

[0103] Advantage 4: A calculation method for the material and flow of the concentration device is constructed to facilitate the evaluation and verification of the concentration efficiency and obtain the optimal combined operating conditions.

[0104] Advantage 5: The addition of carriers builds a "mud film symbiosis" system, which can retain more long-generation microorganisms and improve the efficiency of nitrogen and phosphorus removal.

[0105] Advantage 6: The ratio of concentrated liquid to anaerobic and anoxic zones can be flexibly adjusted according to the level of influent pollutants to enhance the pollutant removal effect.

[0106] The above technical solutions of the present invention are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An intelligent sewage treatment HPB-MBR device, characterized in that: It includes a biochemical pool, a multi-stage cyclone concentration mechanism and an MBR pool which are connected in sequence; The biochemical pool includes an anaerobic pool, an anoxic pool and an aerobic pool that are connected in sequence, and the biochemical pool has a flowing carrier and an HPB mixed liquid formed based on the carrier; The multi-stage cyclone concentrating mechanism is connected to the aerobic tank, and the multi-stage cyclone concentrating mechanism includes 2 to 3 stages of cyclone concentrating mechanisms arranged in series; each stage of the cyclone concentrating mechanism includes a cyclone concentrator, an inlet pump located on the water inlet side of the cyclone concentrator, and an outlet pump located on the underflow discharge side of the cyclone concentrator, and the underflow discharge side of the cyclone concentrator at any stage is connected to at least one of the anaerobic tank and the anoxic tank to form a first reflux pipeline; the first-stage cyclone concentrator, the second-stage cyclone concentrator, and the third-stage cyclone concentrator are arranged in descending order according to the distance from the aerobic tank; The MBR pool is connected to the overflow outlet of the first-stage cyclone concentrator; the MBR pool has a reflux pipe and a drainage pipe; the reflux pipe is connected to the aerobic pool to form a second reflux pipeline.

2. The intelligent sewage treatment HPB-MBR device according to claim 1, characterized in that: The multi-stage cyclone concentrating mechanism includes three stages of cyclone concentrating mechanisms arranged in series; The third-stage cyclone concentrator can regulate whether to perform cyclone concentration.

3. The intelligent sewage treatment HPB-MBR device according to claim 2, characterized in that: The intelligent sewage treatment HPB-MBR device also includes a bypass pipe, which is directly connected between the second-stage cyclone concentrating mechanism and the aerobic tank; the bypass pipe and the third-stage cyclone concentrator are respectively provided with an inlet valve for controlling whether the third-stage cyclone concentrator performs cyclone concentration.

4. The intelligent sewage treatment HPB-MBR device according to claim 1, characterized in that: It also includes a third return pipeline, one end of which is connected to the MBR tank, and the other end is connected to the anoxic tank; the third return pipeline is provided with a carrier recovery device.

5. The intelligent sewage treatment HPB-MBR device according to claim 1, characterized in that: The first reflux pipeline includes branch pipes connected to the anoxic tank and the anaerobic tank respectively, and the branch pipes are each provided with a valve for adjusting the opening.

6. The intelligent sewage treatment HPB-MBR device according to any one of claims 1 to 5, characterized in that: The intelligent sewage treatment HPB-MBR device includes a flow meter for measuring the flow rate on the water inlet side of each stage of the cyclone concentrator.

7. The intelligent sewage treatment HPB-MBR device according to claim 6, characterized in that: The optimal split ratios corresponding to the cyclone concentrators at each stage are completely identical, partially identical, or completely different; and the adjustment range of the outflow pump at each stage meets the requirements of the optimal split ratio of the corresponding cyclone concentrator.

8. The intelligent sewage treatment HPB-MBR device according to claim 7, characterized in that: The anaerobic tank is provided with a temperature probe for measuring water temperature.

9. The intelligent sewage treatment HPB-MBR device according to claim 8, characterized in that: A sludge concentration meter is provided on the pipeline connecting the aerobic tank and the multi-stage cyclone concentration mechanism.

10. The intelligent sewage treatment HPB-MBR device according to claim 9, characterized in that: It also includes an intelligent controller, the input end of the intelligent controller is respectively connected to the flow meter, temperature probe, and sludge concentration meter, and the output end of the intelligent controller is respectively connected to the inlet pump and the outlet pump corresponding to each level of cyclone concentration mechanism.

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