Intelligent dosing and chlorination sewage treatment equipment

Abstract

The application provides a sewage treatment equipment with intelligent dosing and chlorination, and relates to the technical field of sewage treatment.The sewage treatment equipment with intelligent dosing and chlorination is installed on a main pipeline through a metering pump, an electromagnetic flowmeter is installed on the upstream of the main pipeline, and an exhaust part and a full-flow part are sequentially connected in the water flow direction on the upstream of the main pipeline;the upstream of the exhaust part is connected to the main pipeline, the exhaust part is connected to the full-flow part, and the downstream of the full-flow part is connected to the electromagnetic flowmeter;the exhaust part is designed as a transverse Venturi tube, multiple gas collection cabins are uniformly arranged on the throat of the exhaust part, the inner diameter of the gas collection cabin is larger than that of the throat, the bubbles in the fluid are extracted and gathered through the low pressure formed by the position of the throat, and an exhaust valve is connected to the top end of the gas collection cabin;the full-flow part is arranged as a U-shaped tube with low upstream and high downstream, the U-shaped opening formed by the full-flow part is upward, a liquid seal is formed in the full-flow part to realize stable liquid level, buffer pressure fluctuation, and ensure that the downstream fluid forms a full-pipe state.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and more specifically, to a smart wastewater treatment device for chemical dosing and chlorination. Background Technology

[0002] Wastewater contains a large number of pathogenic microorganisms such as bacteria, viruses, and parasite eggs (e.g., Escherichia coli, Salmonella, enteroviruses). After chlorination, the hypochlorous acid (HClO) produced by the reaction of chlorine and water has strong oxidizing properties. It can penetrate the cell membrane of microorganisms, destroy their enzyme systems, nucleic acids, and other key structures, causing them to lose their activity and die. This blocks the spread of pathogens, prevents wastewater from polluting water bodies and causing public health risks after discharge, and at the same time oxidizes and decomposes pollutants in wastewater, achieving deep purification of water quality.

[0003] In existing wastewater treatment processes, a dosing branch pipe is usually installed on the main pipeline leading to the disinfection tank. Sodium hypochlorite solution is added into the pipe through a metering pump. A static mixer is installed immediately after the dosing point to ensure that the sodium hypochlorite solution is fully mixed with the wastewater in the pipe. The mixture then enters the disinfection tank and is kept in contact for disinfection for no less than 30 minutes before being discharged in compliance with standards.

[0004] In this process, the dosage of sodium hypochlorite solution is generally based on the real-time flow signal monitored by the electromagnetic flowmeter installed on the main pipeline, which is then fed back to the PLC control system. The PLC adjusts the output of the metering pump according to the set dosage concentration to achieve quantitative dosing of sodium hypochlorite solution. However, the electromagnetic flowmeter can only achieve accurate measurement under full-pipe flow conditions. When there is non-full-pipe flow in the main pipeline, the flowmeter reading is prone to zeroing or drastic fluctuations, causing the chlorination control system to misjudge that there is no water flow and stop dosing, resulting in insufficient disinfection of the effluent and excessive bacterial levels. Summary of the Invention

[0005] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an intelligent wastewater treatment device for chemical dosing and chlorination, which is installed on a main pipeline via a metering pump. An electromagnetic flow meter is installed upstream of the main pipeline. A static mixer is connected downstream of the metering pump on the main pipeline. An exhaust section and a full-flow section are sequentially connected upstream of the electromagnetic flow meter on the main pipeline along the water flow direction. The exhaust section is connected upstream of the main pipeline, downstream of the exhaust section is connected upstream of the full-flow section, and downstream of the full-flow section is connected to the electromagnetic flow meter. The exhaust section adopts... The horizontally placed Venturi tube design has an upstream open end larger than the downstream open end. Multiple gas collecting chambers are evenly arranged in its throat, and the inner diameter of the gas collecting chamber is larger than the inner diameter of the exhaust throat. The increased flow velocity at the exhaust throat position creates a low pressure, which draws and collects air bubbles in the fluid. The top of the gas collecting chamber is connected to an exhaust valve to discharge the collected gas. The full-flow section is arranged in a U-shape with the upstream lower and the downstream higher. The U-shaped opening formed by the full-flow section faces upward, and a liquid seal is formed inside to stabilize the liquid level, buffer pressure fluctuations, and ensure that the downstream fluid is in a full-pipe state.

[0006] Preferably, the exhaust section includes a contraction pipe, a throat pipe, and an expansion pipe connected in sequence. The contraction pipe is connected to the upstream main pipe, the throat pipe is connected to the downstream of the contraction pipe, and one end of the expansion pipe is connected to the downstream of the throat pipe and the other end is connected to the upstream of the full flow section.

[0007] Preferably, the contraction tube is provided with a funnel-shaped opening that gradually narrows along the water flow direction.

[0008] Preferably, the expansion pipe is arranged in the shape of a gradually expanding horn along the water flow direction, and the open end of the expansion pipe is smaller than the open end of the contraction pipe.

[0009] Preferably, a plurality of the gas collecting chambers are evenly arranged in the throat pipe, and the inner diameter of the throat pipe is smaller than the inner diameter of the gas collecting chambers. The top of the gas collecting chamber is connected to a first exhaust pipe, and the end of the first exhaust pipe is connected to an exhaust valve.

[0010] Preferably, the U-shaped full-flow section includes a submerged pipe, an arc-shaped pipe, and a riser pipe. One end of the submerged pipe is connected to the end of the expansion pipe, one end of the arc-shaped pipe is connected to the submerged pipe, and the other end of the riser pipe is connected to the inlet end of the electromagnetic flowmeter.

[0011] Preferably, the sinking pipe extends downward at an angle, with its angle pointing toward the side of the rising pipe.

[0012] Preferably, the riser extends upward at an angle, with its angle pointing toward the electromagnetic flowmeter, and the downstream end of the riser is higher than the upstream end of the submerged pipe.

[0013] Preferably, the bottom end of the arc-shaped tube is connected to a drain valve.

[0014] Preferably, a plurality of intercepting plates are evenly arranged on the upward-facing side of the inner wall of the riser pipe, and a second exhaust pipe connected to the riser pipe is provided on the upstream side of the plurality of intercepting plates, and an exhaust valve is also connected to the end of the second exhaust pipe.

[0015] The beneficial effects of this invention are: 1. By utilizing the Venturi tube design of the exhaust section, a low pressure is formed at its throat, which extracts and collects air bubbles in the liquid flow into multiple gas collection chambers. The collected gas is discharged through the exhaust valve connected to the top of the gas collection chamber, thus preventing air bubbles from entering the electromagnetic flow meter with the liquid flow and interfering with the flow meter. 2. The upstream open end of the exhaust section is larger than the downstream open end. The larger liquid inlet will result in a greater pressure difference between this point and the throat, making the suction and exhaust power at the throat stronger. The liquid outlet is smaller than the inlet, making it less likely for backflow and eddies to occur at the downstream end, thus creating a stable flow effect on the liquid. 3. The U-shaped design of the full-flow section creates a liquid seal effect, resulting in a full-pipe effect for the liquid flow towards the electromagnetic flowmeter; 4. By utilizing the design of the outlet end of the full flow section being higher than the inlet end and the pipe being inclined, air bubbles are prevented from being trapped at the bottom bend. The air bubbles are allowed to move upwards along the outlet end and eventually be discharged from the outlet section. This allows for secondary interception and discharge of air bubbles that have not been completely extracted by the exhaust section.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an intelligent chemical dosing and chlorination wastewater treatment device according to an embodiment of this application; Figure 2 This is a partial structural cross-sectional view of a smart dosing and chlorination wastewater treatment device according to an embodiment of this application; Figure 3 According to the embodiments of this application Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a cross-sectional view of the exhaust section and the full-flow section according to an embodiment of this application; Figure 5 This is a cross-sectional view of the exhaust section according to an embodiment of this application; Figure 6 This is a schematic diagram showing the location and structure of the current stabilizing section according to an embodiment of this application; Figure 7 This is an exploded view of the exhaust section and the flow stabilizing section according to an embodiment of this application; Figure 8 This is a schematic diagram of the positional structure of the first irregularly shaped block and the second irregularly shaped block within the air-gathering chamber according to an embodiment of this application. Figure 1 ; Figure 9 This is a schematic diagram of the positional structure of the first irregularly shaped block and the second irregularly shaped block within the air-gathering chamber according to an embodiment of this application. Figure 2 ; Figure 10 This is a schematic diagram of the positional structure of the first irregularly shaped block and the second irregularly shaped block within the air-gathering chamber according to an embodiment of this application. Figure 3 ; Figure 11 This is a schematic diagram of the position and structure of the arc-shaped scraper according to an embodiment of this application.

[0019] Icons: 1. Metering pump; 2. Main pipeline; 21. Electromagnetic flowmeter; 3. Exhaust section; 31. Contraction pipe; 32. Throat; 33. Expansion pipe; 34. Gas collection chamber; 341. First exhaust pipe; 342. First mounting cavity; 343. Second mounting cavity; 4. Full flow section; 41. Submerged pipe; 42. Arc-shaped pipe; 421. Drain valve; 43. Riser pipe; 431. Interceptor plate; 432. Second exhaust pipe; 5. Flow stabilizing section; 51. Rotating shaft; 52. End drive component; 521. End fan blade; 522. Rotating ring; 53. Disturbance fan blade; 54. First irregular block; 55. Second irregular block; 56. Flow stabilizing assembly; 561. Guide rod; 562. Flow stabilizing plate; 563. Spring; 6. Arc-shaped scraper. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1 like Figures 1-5 As shown, a smart dosing and chlorination wastewater treatment device according to an embodiment of this application is installed on a main pipeline 2 via a metering pump 1. An electromagnetic flow meter 21 is installed upstream of the main pipeline 2, and a pipeline static mixer is connected downstream of the metering pump 1 on the main pipeline 2.

[0023] It should be noted that the intelligent dosing and chlorination equipment in this application includes: an online monitoring module, a reagent dissolution module, a precision dosing module, an intelligent control module, and a main pipeline 2. The online monitoring module is used to monitor the pH, ORP, residual chlorine, turbidity, flow rate, and liquid level of the wastewater in real time. The reagent dissolution module includes a dissolving tank, a storage tank, and a stirring device. The precision dosing module includes a metering pump 1, an electromagnetic flow meter 21, and a regulating valve. The intelligent control module includes a PLC, a touch screen, an Internet of Things (IoT) device, and a remote platform.

[0024] Among them, the online monitoring module, as the "sensing core" of intelligent equipment control, collects key parameters of the entire wastewater treatment process in real time through various high-precision sensors, providing accurate data support for subsequent chemical dosing adjustments and system safety protection. The functions of each core component are as follows: pH sensor: Real-time monitoring of wastewater acidity and alkalinity (pH value), and real-time transmission of monitoring data to the intelligent control cabinet. This serves as the core control basis for the dosage of acid and alkali agents, ensuring that the wastewater pH value remains stable within the process requirements and guaranteeing the efficient execution of subsequent coagulation, flocculation and disinfection reactions. ORP sensor: Real-time detection of wastewater oxidation-reduction potential (ORP value), indirectly reflecting the concentration and reaction state of redox substances in wastewater, assisting in optimizing disinfectant dosing strategies, improving the sufficiency and stability of disinfection reactions, and ensuring disinfection effectiveness; Residual chlorine sensor: accurately monitors the residual chlorine content at the effluent outlet, provides real-time feedback on disinfection effectiveness, and automatically adjusts the disinfectant dosage through closed-loop control logic to ensure that the residual chlorine concentration in the effluent strictly complies with national wastewater discharge standards, thus preventing substandard disinfection. Electromagnetic flow meter 21: Real-time collection of influent flow data serves as the basis for the proportion of chemical dosing, realizing the "flow-following" dosing mode to ensure that the amount of chemical added is accurately matched with the influent flow, avoiding over- or under-dosing of chemicals due to fluctuations in water volume; Liquid level sensor: Installed in the drug storage tank and dissolving tank, it monitors the liquid level of the drug / solution in the tank in real time. When the liquid level is lower than the preset low liquid level threshold, it triggers a low liquid level alarm and stops metering pump 1 to prevent metering pump 1 from running dry and being damaged. When the liquid level is higher than the preset high liquid level threshold, it triggers a high liquid level alarm and stops drug replenishment to avoid drug overflow, waste and safety hazards.

[0025] The reagent dissolution module and the precision dosing module are the core execution modules of the equipment to achieve precise reagent dosing and efficient reaction. They integrate reagent dissolution, dilution, proportioning, dosing, and mixing functions to ensure that the reagent reacts fully with the wastewater in the best possible condition. The functions of each core component are as follows: Dissolving tank: Equipped with an automatic stirring device, it can automatically dissolve, dilute and accurately proportion solid agents (such as PAC, PAM, etc.) or liquid agents. The stirring process is uniform and stable, ensuring that the agent is fully dissolved and the concentration is uniform, laying the foundation for subsequent accurate dosing; the tank body is made of corrosion-resistant material, which is compatible with various sewage treatment agents and avoids the agent from corroding and damaging the equipment. Metering pump 1: It adopts a dual frequency conversion / stroke adjustment mode, has a high-precision dosing capability, and the dosing accuracy can reach ±1%. According to the control instructions issued by the intelligent control cabinet, it adjusts the dosing amount in real time to realize the precise dosing of the agent as needed. At the same time, it supports manual / automatic dual mode switching to meet the needs of emergency operation. Static pipeline mixer: Installed inside the sewage pipeline after the chemical is added, it uses a special internal flow guiding structure to create strong turbulent mixing between the sewage and the chemical, further enhancing the mixing effect, shortening the reaction time between the chemical and the sewage, improving the efficiency of coagulation, flocculation and disinfection reactions, and ensuring stable treatment results.

[0026] The intelligent control module adopts an integrated design of PLC controller and touch screen, integrating logic control, algorithm control, alarm protection and data interaction functions to realize fully automated operation and intelligent management of the equipment. The core functions are as follows: Logic control: It has complete linkage, interlock and timing control logic, which can realize the coordinated operation of various unit components (such as metering pump 1, agitator, valve, sensor, etc.); through preset logic, it realizes functions such as equipment start-up and shutdown, mode switching, and reagent dosing linkage, ensuring orderly and reliable system operation and avoiding equipment failure caused by misoperation or component conflict; Algorithm control: The algorithm adopts a composite control algorithm of "flow ratio + water quality feedback". It combines influent flow data with water quality parameters such as pH, residual chlorine and ORP monitored online to automatically calculate the optimal dosage of reagents and adjust the operating status of metering pump 1 in real time. The algorithm supports adaptive optimization and can automatically adjust the control parameters according to the fluctuation of wastewater quality to ensure stable treatment effect while minimizing reagent consumption. Alarm and Protection: Equipped with comprehensive fault alarm and safety protection functions, it can monitor abnormal situations such as dry running of metering pump 1, drug leakage, equipment overload, low liquid level in the medicine tank, and sensor communication failure in real time. When an abnormality is detected, it immediately triggers an audible and visual alarm, and automatically executes protection actions (such as shutdown, valve shut-off, etc.), and records fault information to facilitate quick troubleshooting and handling by operation and maintenance personnel, ensuring the safe and stable operation of the equipment and the personal safety of operators.

[0027] In a specific embodiment of this application, an exhaust section 3 and a full-flow section 4 are sequentially connected upstream of the electromagnetic flow meter 21 in the main pipeline 2 along the water flow direction. The exhaust section 3 is connected upstream to the main pipeline 2, and downstream of the exhaust section 3 is connected upstream of the full-flow section 4. The full-flow section 4 is connected downstream of the electromagnetic flow meter 21. The exhaust section 3 adopts a horizontal Venturi tube design, with its upstream open end being larger than its downstream open end. Multiple gas collecting chambers 34 are evenly arranged in its throat. The inner diameter of the gas collecting chamber 34 is larger than the inner diameter of the throat of the exhaust section 3. The increased flow velocity at the throat of the exhaust section 3 creates low pressure, which extracts and collects air bubbles in the fluid. An exhaust valve is connected to the top of the gas collecting chamber 34 to discharge the collected gas. The full-flow section 4 is arranged in a U-shape with the upstream lower and the downstream higher. The U-shaped opening of the full-flow section 4 faces upward, and a liquid seal is formed inside to stabilize the liquid level, buffer pressure fluctuations, and ensure that the downstream fluid forms a full pipe state.

[0028] Specifically, the exhaust section 3 includes a contraction pipe 31, a throat pipe 32, and an expansion pipe 33 connected in sequence. The contraction pipe 31 is connected to the upstream main pipe 2, the throat pipe 32 is connected to the downstream of the contraction pipe 31, and one end of the expansion pipe 33 is connected to the downstream of the throat pipe 32 and the other end is connected to the upstream of the full flow section 4.

[0029] The contraction pipe 31 is provided with a gradually narrowing flared opening along the direction of water flow, and the expansion pipe 33 is provided with a gradually expanding flared opening along the direction of water flow, with the open end of the expansion pipe 33 being smaller than the open end of the contraction pipe 31.

[0030] Therefore, it can be seen that after the water enters the inlet of the exhaust section 3, its flow velocity gradually increases as the channel narrows, until it enters the throat 32, where its flow velocity reaches its maximum and its pressure reaches its minimum. The outlet gradually expands and is smaller than the inlet, so the flow velocity gradually decreases and the pressure gradually rises. However, the pressure value at this point is less than the pressure value at the inlet. This creates a larger pressure difference between the contraction tube 31 and the throat 32, enhancing the suction strength of the throat. This makes it easier for air bubbles in the water flow to be extracted by the throat and accumulate in the throat. Furthermore, because the outlet is smaller than the inlet, backflow and eddy currents are less likely to occur at the expansion tube 33, thus stabilizing the water flow.

[0031] Furthermore, multiple gas collection chambers 34 are evenly arranged on the throat pipe 32, and the inner diameter of the throat pipe 32 is smaller than the inner diameter of the gas collection chambers 34. The top of the gas collection chambers 34 is connected to a first exhaust pipe 341, and the end of the first exhaust pipe 341 is connected to an exhaust valve.

[0032] It should be noted that the exhaust valve mentioned in this application has a check valve structure, allowing only outflow and no inflow, so there is no need to worry about external gas flowing back from the exhaust valve to the throat.

[0033] Understandably, after the gas is drawn and collected by the throat, the water flow velocity inside the throat 32 is fast, while the water flow velocity inside the gas collection chamber 34 is slow due to its larger cross-sectional area. This makes it easier for the gas bubbles to be collected by the gas collection chamber 34. The arrangement of multiple gas collection chambers 34 will form a multi-stage capture of the gas bubbles drawn by the throat, improve the gas bubble collection efficiency, and reduce the number of gas bubbles that are directly washed away by the water flow due to the high flow velocity. Subsequently, the collected gas bubbles will be discharged from the exhaust valve at the top of the gas collection chamber 34, reducing the gas bubble content in the water flow.

[0034] In a specific embodiment of this application, the U-shaped full-flow section 4 includes a submerged pipe 41, an arc-shaped pipe 42, and a riser pipe 43. One end of the submerged pipe 41 is connected to the end of the expansion pipe 33, one end of the arc-shaped pipe 42 is connected to the submerged pipe 41, and the other end is connected to the riser pipe 43. The other end of the riser pipe 43 is connected to the inlet end of the electromagnetic flowmeter 21.

[0035] Specifically, the sinking pipe 41 extends downward at an angle, with its angle towards the rising pipe 43. The rising pipe 43 extends upward at an angle, with its angle towards the electromagnetic flowmeter 21. The downstream end of the rising pipe 43 is higher than the upstream end of the sinking pipe 41.

[0036] It should be noted that the inclined arrangement of the sinking pipe 41 and the riser pipe 43 is not a traditional symmetrical structure. The inclined arrangement of the sinking pipe 41 allows for a smooth fluid transition, reducing the impact and eddies at the bottom of the arc-shaped pipe 42, effectively reducing pressure pulsation and the risk of water hammer. The inclined arrangement of the riser pipe 43 helps residual air bubbles in the water flow to rise to the upward side of the riser pipe 43 wall.

[0037] The bottom end of the arc-shaped pipe 42 is connected to a drain valve 421, which helps to discharge the dirt deposited inside the arc-shaped pipe 42.

[0038] It should be noted that multiple intercepting plates 431 are evenly arranged on the upward-facing side of the inner wall of the riser pipe 43, and a second exhaust pipe 432 connected to the riser pipe 43 is provided on the upstream side of the multiple intercepting plates 431. An exhaust valve is also connected to the end of the second exhaust pipe 432.

[0039] It is understandable that the residual air bubbles carried by the water flow in the riser pipe 43 will converge towards the upward side of the riser pipe 43 wall during the flow process, and will then be gradually intercepted by multiple interceptor plates 431, and finally discharged from the exhaust valve at the second exhaust pipe 432, further intercepting and eliminating air bubbles in the water flow, and reducing interference to the downstream electromagnetic flowmeter 21.

[0040] Example 2 In the relevant technology, this intelligent dosing and chlorination sewage treatment equipment has multiple air collection chambers 34 evenly arranged on the throat pipe 32. In order to better collect air bubbles, the inner diameter of the multiple air collection chambers 34 is significantly larger than the inner diameter of the throat pipe 32. Since the water flow velocity in the throat pipe 32 is relatively fast, after the water flow enters the axial range of the air collection chamber 34, it will form a vortex zone at the connection between the chamber and the throat pipe 32, which weakens the overall efficiency of the Venturi tube. At the same time, after the high-speed water flow enters the air collection chamber 34, it will form a loaded flow state, and some of the air bubbles that have been collected will be re-rolled away by the vortex, affecting the collection effect of the air collection chamber 34.

[0041] According to some embodiments of this application, such as Figures 6-10 As shown, a flow stabilizing part 5 is arranged axially inside the throat 32. The flow stabilizing part 5 includes a rotating shaft 51. Two end drive members 52 are coaxially fixed at both ends of the rotating shaft 51. The two end drive members 52 have the same size and direction. Multiple disturbance fan blades 53 are evenly arranged on the rotating shaft 51. The multiple disturbance fan blades 53 correspond one-to-one with multiple air collection chambers 34.

[0042] The end drive component 52 includes an end fan blade 521 coaxially fixed to the rotating shaft 51, and a rotating ring 522 coaxially fixed to the periphery of the end fan blade 521. The rotating ring 522 is rotatably fitted into the throat tube 32 (for axial positioning; in actual use, it can be installed in a detachable manner, and the specific installation method will not be described in detail in this application).

[0043] It should be noted that in this application, the two end fan blades 521 on the two end drive members 52 are arranged in the same direction, and the multiple disturbance fan blades 53 are also arranged in the same direction as the end fan blades 521. It can be understood that under the impact of the water flow, the two end drive members 52, the rotating shaft 51 and the multiple disturbance fan blades 53 will rotate synchronously in the same direction without generating power interference, and further improve the stability of the water flow rotation in the entire throat 32.

[0044] It should be further explained that, such as Figure 5 As shown, the inner side of the gas collection chamber 34 is provided with two first mounting cavities 342, and a second mounting cavity 343 is provided between the two first mounting cavities 342. The inner diameter of the second mounting cavity 343 is larger than the inner diameter of the first mounting cavity 342. A first irregular block 54 is embedded in the bottom of the first mounting cavity 342, and a second irregular block 55 is embedded in the bottom of the second mounting cavity 343.

[0045] That is, a second mounting cavity 343 is provided at the axial center of the air collection chamber 34, and two first mounting cavities 342 are symmetrically arranged on both sides of the second mounting cavity 343, and the diameter of the second mounting cavity 343 is larger than the diameter of the first mounting cavity 342.

[0046] Furthermore, such as Figures 7-10As shown, the first irregular block 54 is a centrally symmetrical arc structure. The arc length of its outer side is half the circumference of the first mounting cavity 342. Its two ends extend to the horizontal plane where the central axis of the first mounting cavity 342 is located. The inner side of the first irregular block 54 has two symmetrical arcs, so that the first irregular block 54 gradually becomes thinner from the inner center to both ends, and the thickest part of the first irregular block 54 does not protrude from the first mounting cavity 342.

[0047] The second irregular block 55 has a centrally symmetrical ring structure. The ring thickness of the second irregular block 55 gradually decreases from its bottom end to its top end, and its bottom end thickness does not exceed the second mounting cavity 343. The inner arc shape of the first irregular block 54 and the inner arc shape of the second irregular block 55 are matched.

[0048] It should be noted that the disturbance fan blade 53 corresponds to the first irregular block 54 on the upstream side of the gas collection chamber 34.

[0049] Therefore, it can be seen that under the filling effect of the first irregular block 54 on both sides and the second irregular block 55 in the middle, the bottom of the gas collecting chamber 34 is filled, and the filling shape gradually decreases from the bottom to the top. It can be understood that the cross-sectional area of ​​the gas collecting chamber 34 becomes smaller. Secondly, the volume of the cavity below its axial horizontal plane is reduced. When the water flows through this cavity, it mainly interacts with the upper cavity, which further facilitates the gathering of bubbles at the top of the gas collecting chamber 34. Furthermore, after the water flows into the gas collecting chamber 34, it will be affected by the rotation of the disturbance fan blade 53 at this location, causing the water flow to form a certain rotation and dispersion effect, reducing the generation of vortices at the connection between the gas collecting chamber 34 and the throat pipe 32.

[0050] A flow stabilizing component 56 is provided on the inner side of the first irregularly shaped block 54 located in the downstream direction. The flow stabilizing component 56 includes multiple guide rods 561 axially fixed in the two first mounting cavities 342. The multiple guide rods 561 are located at the inner top of the two first mounting cavities 342. A flow stabilizing plate 562 is slidably arranged on the multiple guide rods 561. The flow stabilizing plate 562 is located in the first mounting cavity 342 in the downstream direction and slides in cooperation with the first mounting cavity 342 and the first irregularly shaped block 54. The flow stabilizing plate 562 is a centrally symmetrical annular structure. A circular hole with the same inner diameter as the throat tube 32 is provided on its inner side. A spring 563 is respectively sleeved on the side of the multiple guide rods 561 facing the downstream direction. One end of the spring 563 abuts against the flow stabilizing plate 562 and the other end abuts against the end of the first mounting cavity 342.

[0051] It is understandable that after the water flow enters the first installation cavity 342 on the downstream side of the gas collection chamber 34, it will impact the flow stabilizing plate 562 and cause it to squeeze the spring 563 along the guide rod 561. In this way, the elastic effect of the spring 563 will stabilize the water flow and reduce the water hammer effect at this point.

[0052] It should be noted that the top of the second irregular block 55 is provided with a hole for communication between the first exhaust pipe 341 and the gas collection chamber 34.

[0053] Therefore, in practical use, the end fan blades 521 and the disturbance fan blades 53 can make the water flow rotate within the throat 32, thereby reducing the energy in the water flow and reducing the possibility of the water flow forming eddies after entering the air collection chamber 34. Secondly, the rotation of the disturbance fan blades 53 will further interfere with the water flow entering the air collection chamber 34. In this way, the bubbles gathered at the top of the second irregular block 55 can be stabilized. The water body downstream of the air collection chamber 34 is stabilized by the elastic flow stabilization effect of the flow stabilizer plate 562, reducing the water hammer effect formed downstream of the air collection chamber 34. In this way, the stable gathering of the top bubbles in the second irregular block 55 can be further guaranteed.

[0054] Example 3 In the relevant technology, the inner diameter of the intelligent dosing and chlorination sewage treatment equipment is relatively small compared to the main pipe 2, and the inner diameter of the throat 32 needs to be guaranteed because air bubbles need to be extracted and collected inside the throat 32. However, in the actual sewage treatment process, the actual cross-sectional area of ​​water flow will inevitably become smaller due to the thickening of sludge. Once the sludge formed over a long period of time falls off and forms flocculent clumps, it will cause the flow meter reading to jump instantaneously.

[0055] According to some embodiments of this application, such as Figure 3 and Figure 11 As shown, multiple sets of scraping components are evenly distributed along the axial direction inside the throat tube 32. The multiple sets of scraping components are fixed to the rotating shaft 51 and slide in cooperation with the inner wall of the throat tube 32. The multiple sets of scraping components and multiple air collection chambers 34 are arranged at intervals.

[0056] Each set of scraping components consists of at least three arc-shaped scraper blades 6 evenly distributed around the circumference. The arc-shaped scraper blades 6 are arranged in a spiral shape, and the spiral direction of the arc-shaped scraper blades 6 is consistent with the rotation direction of the end drive component 52 and the disturbance fan blade 53.

[0057] Therefore, in actual use, the rotating shaft 51 rotates under the drive of the end fan blade 521 and the disturbance fan blade 53, which in turn drives multiple sets of scraping parts to rotate. The multiple sets of scraping parts are arranged at intervals with the air collection chamber 34. Thus, it can be understood that during the rotation of the scraping parts, the inner wall of the throat 32 will be scraped and cleaned in real time, so that the throat 32 will not form a wall-hanging phenomenon due to sludge, and there will be no long-term sludge falling off to form large-volume dirt such as clumps or blocks, thereby reducing the impact on the accuracy of the downstream electromagnetic flowmeter 21.

[0058] It should be noted that the specific models and specifications of metering pump 1, electromagnetic flowmeter 21, drain valve 421, end fan blade 521, disturbance fan blade 53 and spring 563 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0059] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A smart wastewater treatment device for chemical dosing and chlorination, comprising a metering pump (1) installed on a main pipeline (2), wherein an electromagnetic flowmeter (21) is installed upstream of the main pipeline (2), and a static mixer is connected downstream of the metering pump (1) on the main pipeline (2), characterized in that: The main pipeline (2) is connected to an exhaust section (3) and a full flow section (4) in sequence along the water flow direction upstream of the electromagnetic flowmeter (21). The upstream of the exhaust section (3) is connected to the main pipe (2), the downstream of the exhaust section (3) is connected to the upstream of the full flow section (4), and the downstream of the full flow section (4) is connected to the electromagnetic flowmeter (21). The exhaust section (3) adopts a horizontal Venturi tube design, with its upstream open end being larger than its downstream open end. Multiple gas collection chambers (34) are evenly arranged in its throat. The inner diameter of the gas collection chamber (34) is larger than the inner diameter of the throat of the exhaust section (3). The flow velocity increases through the throat of the exhaust section (3) to form a low pressure, which extracts and collects the bubbles in the fluid. The top of the gas collection chamber (34) is connected to an exhaust valve for discharging the collected gas. The full-flow section (4) is arranged in a U-shaped tube with the upstream lower and the downstream higher. The U-shaped opening of the full-flow section (4) faces upward, and a liquid seal is formed inside to stabilize the liquid level, buffer pressure fluctuations, and ensure that the downstream fluid forms a full-pipe state.

2. The intelligent chlorination and dosing wastewater treatment equipment as described in claim 1, characterized in that, The exhaust section (3) includes a constriction pipe (31), a throat pipe (32) and an expansion pipe (33) connected in sequence. The constriction pipe (31) is connected to the upstream main pipe (2), the throat pipe (32) is connected to the downstream of the constriction pipe (31), and one end of the expansion pipe (33) is connected to the downstream of the throat pipe (32) and the other end is connected to the upstream of the full flow section (4).

3. The intelligent chlorination and dosing wastewater treatment equipment as described in claim 2, characterized in that, The contraction tube (31) is set with a funnel-shaped opening that gradually narrows along the direction of water flow.

4. The intelligent chlorination wastewater treatment equipment as described in claim 2, characterized in that, The expansion pipe (33) is arranged in a gradually expanding funnel shape along the water flow direction, and the open end of the expansion pipe (33) is smaller than the open end of the contraction pipe (31).

5. The intelligent chlorination wastewater treatment equipment as described in claim 4, characterized in that, Multiple gas collection chambers (34) are evenly arranged on the throat (32), and the inner diameter of the throat (32) is smaller than the inner diameter of the gas collection chamber (34). The top of the gas collection chamber (34) is connected to a first exhaust pipe (341), and the end of the first exhaust pipe (341) is connected to an exhaust valve.

6. The intelligent chlorination wastewater treatment equipment as described in claim 2, characterized in that, The U-shaped full-flow section (4) includes a sinking pipe (41), an arc-shaped pipe (42), and a riser pipe (43). One end of the sinking pipe (41) is connected to the end of the expansion pipe (33), one end of the arc-shaped pipe (42) is connected to the sinking pipe (41), and the other end is connected to the riser pipe (43). The other end of the riser pipe (43) is connected to the inlet end of the electromagnetic flowmeter (21).

7. The intelligent chlorination wastewater treatment equipment as described in claim 6, characterized in that, The sinking pipe (41) extends downward at an angle, with its angle facing the side of the rising pipe (43).

8. The intelligent chlorination wastewater treatment equipment as described in claim 6, characterized in that, The riser pipe (43) extends upward at an angle, with its angle facing the electromagnetic flowmeter (21), and the downstream end of the riser pipe (43) is higher than the upstream end of the sink pipe (41).

9. The intelligent chlorination wastewater treatment equipment as described in claim 6, characterized in that, The bottom end of the arc-shaped pipe (42) is connected to a drain valve (421).

10. The intelligent chlorination and dosing wastewater treatment equipment as described in claim 6, characterized in that, Multiple interceptor plates (431) are evenly arranged on the upper side of the inner wall of the riser pipe (43). A second exhaust pipe (432) connected to the riser pipe (43) is provided on the upstream side of the multiple interceptor plates (431). An exhaust valve is also connected to the end of the second exhaust pipe (432).

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