An activated sludge denitrification and phosphorus removal performance testing and analysis equipment

Abstract

The present invention discloses an activated sludge denitrification and phosphorus removal performance testing and analysis device, which relates to the field of activated sludge testing and analysis technology. It comprises a reaction tank, a storage barrel and a conveyor belt. A mounting seat is provided between the reaction tank and the storage barrel. A sludge pump is fixedly installed on the mounting seat. The sludge pump is fixedly connected to an input pipe, and the output end of the sludge pump is fixedly connected to a discharge pipe. A mounting bracket is fixedly installed on the side end face of the reaction tank. A timer is fixedly installed on the mounting bracket. One end of the timer is connected to the reaction tank, and the other end of the timer is fixedly connected to a discharge pipe. A plurality of centrifuge tubes are provided on the conveyor belt. This invention effectively improves the mixing effect and cleaning efficiency of the reactants in the reaction tank through the coordinated use of a down-pressing component and an auxiliary component, ensures that the materials in the reaction tank fully react, and at the same time cleans away the residual sludge, thereby improving the working efficiency and service life of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of activated sludge testing and analysis, in particular to activated sludge denitrification and phosphorus removal performance testing and analysis equipment. Background Art

[0002] The activated sludge denitrification and phosphorus removal performance test and analysis equipment is a device used to evaluate and monitor the effectiveness and performance of activated sludge in denitrification and phosphorus removal during sewage treatment. In an environment such as a food factory, it is very important to treat nitrogen and phosphorus in wastewater because excessive nitrogen and phosphorus can cause eutrophication of water bodies and affect the ecological environment. Among them, sewage treatment technology includes core technologies such as online variable structure neural network sludge concentration SV turbidity prediction, operating condition classification and health assessment, and multi-objective parameter optimization methods. At the same time, the water quality management and control system includes the construction of a set of soft measurement instruments for online monitoring of sludge activity and water quality, which can detect no less than three water quality parameters and sludge activity-related parameters.

[0003] In the prior art, a Chinese patent with the announcement number "CN210465371U" discloses an activated sludge denitrification and phosphorus removal performance test and analysis system, which connects the container with the sludge sampling device, and completes the transportation of the activated sludge from the sludge storage tank to the container through a mechanical device, reducing the intensity of manual work and facilitating automated fine management; the container is connected with the water inlet device, and a sewage pipe is provided on the container, which simplifies the sludge washing operation and the device cleaning operation, and improves work efficiency; the setting of the automatic timing sampling device saves a lot of time for the staff, and also makes the sampling operation more precise and controllable, which is convenient for comprehensive management, reduces the sampling error rate and delay rate, and solves the problem that the existing equipment is inconvenient to feed sludge. Since there is no sludge sampling device, and the device itself is large in size, manual transportation and dumping of sludge into the reaction container is required, which is time-consuming and labor-intensive, and the sludge cleaning work requires additional equipment.

[0004] As described above, when the sludge and medicine in the container are stirred, only a stirring blade that is fixed in a position and cannot change shape is used to stir the sludge and the medicine. The stirring blade can only stir at a single position. Although centrifugal force can be used to mix the reactants in the container, the mixing effect is poor, which will affect the efficiency of the entire equipment. At the same time, in the process of cleaning the container, only water is added to the container through cleaning water, and the cleaning function is completed by mixing water and sludge. Since the sludge will adhere to the inner wall, excess water needs to be added to contact the sludge, which will excessively waste water resources. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides an activated sludge denitrification and phosphorus removal performance testing and analysis device, which solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] An activated sludge denitrification and phosphorus removal performance testing and analysis device comprises a reaction tank, a storage barrel and a conveyor belt, a mounting base is provided between the reaction tank and the storage barrel, a sludge pump is fixedly mounted on the mounting base, an input pipe is fixedly connected to the sludge pump, and an output end of the sludge pump is fixedly connected to a discharge pipe;

[0008] A mounting bracket is fixedly mounted on the side end surface of the reaction tank, a timing material remover is fixedly mounted on the mounting bracket, one end of the timing material remover is connected to the reaction tank, and the other end of the timing material remover is fixedly connected to a discharge pipe;

[0009] A plurality of centrifuge tubes are provided on the conveyor belt;

[0010] A tripod plate is fixedly mounted on the reaction pool, a pressing component is provided on the tripod plate, and an auxiliary component is provided on the pressing component.

[0011] Preferably, the downward pressure assembly includes a hydraulic cylinder fixedly mounted on a tripod plate, a positioning plate fixedly mounted on the output end of the hydraulic cylinder, a bearing fixedly mounted on the lower end surface of the positioning plate, a spiral rod fixedly mounted on the bearing, an L-shaped frame plate fixedly mounted on the lower end surface of the tripod plate, a spiral hole is provided on the L-shaped frame plate, and a downward pressure plate is fixedly mounted on the bottom end of the spiral rod.

[0012] Preferably, a connecting vertical rod is fixedly installed on the lower end surface of the lower pressure plate, a mounting plate is fixedly installed on the lower end surface of the connecting vertical rod, a plurality of connecting cross rods are provided on the side end surface of the mounting plate, and a cleaning arc plate is fixedly installed on the end of the connecting cross rod.

[0013] Preferably, the cleaning arc plate includes a main arc plate, both ends of the main arc plate are provided with mounting grooves, and auxiliary arc plates are rotatably mounted inside the two mounting grooves.

[0014] Preferably, the spiral rod is movably connected to the spiral hole, the spiral rod is located directly above the spiral hole, and the outer side surface of the cleaning arc plate is in contact with the inner side surface of the reaction tank.

[0015] Preferably, a first electric push rod is fixedly installed on the lower end surface of the lower pressure plate, an output end of the first electric push rod is fixedly connected to an adjustment plate, a rotation groove is opened on the outer side surface of the adjustment plate, an adjustment rod is rotatably installed on the inner side surface of the rotation groove, and the upper end surface of the connecting cross bar is fixedly connected to a U-shaped frame.

[0016] Preferably, a rotation groove is provided on the outer side of the mounting plate, a reset groove is provided inside the rotation groove, a reset shaft is rotatably installed inside the reset groove, and a torsion spring is fixedly connected inside the reset groove and on the outside of the reset shaft.

[0017] Preferably, the end of the adjusting rod away from the rotating groove is rotatably connected to the U-shaped frame, the adjusting rod is arranged obliquely, the end of the reset shaft away from the reset groove is fixedly installed on the connecting cross bar, and the end of the torsion spring away from the reset groove is fixedly connected to the connecting cross bar.

[0018] Preferably, the auxiliary component includes a first connecting frame fixedly mounted on the secondary arc plate, a pull rod is rotatably mounted inside the first connecting frame, a second electric push rod is fixedly mounted on the outer side of the connecting cross bar, and the output shaft of the second electric push rod is fixedly mounted on the second connecting frame.

[0019] Preferably, one end of the pulling rod away from the first connecting frame is rotatably connected to the second connecting frame, and the second connecting frame is slidably installed on the connecting cross bar.

[0020] The present invention provides an activated sludge denitrification and phosphorus removal performance test and analysis device. Compared with the existing technology, it has the following advantages:

[0021] 1. In the present invention, when the sludge and medicine in the reaction tank need to be stirred, the first electric push rod drives the adjustment plate to descend, and the adjustment plate cooperates with the U-shaped frame on the connecting cross bar through the adjustment rod in the rotating groove, and the connecting cross bar cooperates with the reset groove through the reset shaft, so that the connecting cross bar rotates around the reset shaft, and the connecting cross bar in a horizontal state rotates an angle. The cooperation between the connecting cross bar and the cleaning arc plate forms a stirring element, and then the positioning plate is reciprocated and lifted by the hydraulic cylinder. The cooperation between the screw rod and the bearing, and the cooperation between the screw rod and the spiral hole can drive the connecting cross bar and the cleaning arc plate to reciprocate and lift in the cement tank. The connection between the cross bar and the cleaning arc plate can effectively ensure the full reaction of the sludge and medicine in the reaction tank;

[0022] 2. According to the present invention, after the reactants in the reaction tank are discharged, in order to prevent the residues in the reaction tank from affecting the new test of the sludge, there is no need to adjust the angle of the connecting crossbar. At this time, the connecting crossbar and the cleaning arc plate form a cleaning part. Water is added to the reaction tank through an external water pipe. After a certain amount of water is added, the hydraulic cylinder reciprocates to drive the positioning plate to rise and fall. By utilizing the cooperation between the screw rod and the bearing, and the cooperation between the screw rod and the spiral hole, the connecting crossbar and the cleaning arc plate can be driven to rise and fall back and forth in the cement tank. The cleaning arc plate is fitted with the inner wall of the reaction tank to fall off the sludge adhering to the inner wall of the reaction tank, thereby effectively improving the use effect of the equipment.

[0023] 3. In order to improve the stirring effect of the stirring element formed by the connecting cross bar and the cleaning arc plate, the present invention drives the second connecting frame to move horizontally on the connecting cross bar through the second electric push rod. The second connecting frame cooperates with the first connecting frame through the pull rod, thereby pulling the secondary arc plate to rotate on the main arc plate. By changing the shape of the cleaning arc plate, the cleaning arc plate and the connecting cross bar form a new stirring element, which greatly improves the mixing of the reactants in the reaction tank.

[0024] 4. The present invention effectively improves the mixing effect and cleaning efficiency of the reactants in the reaction tank through the coordinated use of the down-pressing component and the auxiliary component, ensures that the materials in the reaction tank react fully, and at the same time cleans away the residual sludge, thereby improving the working efficiency and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 Schematic diagram of the mechanism of the downward pressing component in the present invention;

[0027] Figure 3 Schematic diagram of the structure of the tripod plate in the present invention;

[0028] Figure 4 Schematic diagram of the structure of the auxiliary components in the present invention;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 Schematic diagram of the structure of the connecting cross bar in the present invention;

[0031] Figure 7 It is a partial cross-sectional view of the mounting plate of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the arc plate cleaning in the present invention.

[0033] Figure: 1, reaction tank; 2, storage barrel; 3, conveyor belt; 4, mounting base; 5, sludge pump; 6, inlet pipe; 7, discharge pipe; 8, mounting frame; 9, timer feeder; 10, discharge pipe; 11, centrifuge tube; 12, tripod plate; 13, hydraulic cylinder; 14, screw rod; 15, L-shaped frame plate; 16, screw hole; 17, lower pressure plate; 18, connecting vertical rod; 19, mounting plate; 20, connecting horizontal rod; 21, cleaning Arc-processing plate; 2101, main arc plate; 2102, mounting groove; 2103, secondary arc plate; 22, first electric push rod; 23, adjustment plate; 24, rotation groove; 25, adjustment rod; 26, U-shaped frame; 27, rotation groove; 28, reset groove; 29, reset shaft; 30, torsion spring; 31, first connecting frame; 32, pulling rod; 33, second electric push rod; 34, second connecting frame; 35, positioning plate; 36, bearing. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0035] See also Figure 1-8 The present invention is an activated sludge denitrification and phosphorus removal performance testing and analysis equipment, including a reaction tank 1, a storage barrel 2 and a conveyor belt 3. A mounting seat 4 is provided between the reaction tank 1 and the storage barrel 2. A sludge pump 5 is fixedly installed on the mounting seat 4. The sludge pump 5 is fixedly connected to an input pipe 6. The output end of the sludge pump 5 is fixedly connected to a discharge pipe 7. A mounting bracket 8 is fixedly installed on the side end surface of the reaction tank 1. A timer feeder 9 is fixedly installed on the mounting bracket 8. One end of the timer feeder 9 is connected to the reaction tank 1, and the other end of the timer feeder 9 is fixedly connected to a discharge pipe 10. A plurality of centrifuge tubes 11 are provided on the conveyor belt 3, wherein the position of the reaction tank 1 is between the storage barrel 2 and the conveyor belt 3, and the outer side surface of the reaction tank 1 is fixedly connected to a sewage pipe, which is convenient for discharging the remaining reaction water in the reaction tank 1. The conveying principle of the conveyor belt 3, the sewage pipe and the timer feeder 9 are all well known to people in this field and will not be described in detail here.

[0036] A tripod plate 12 is fixedly mounted on the reaction tank 1, a pressing assembly is provided on the tripod plate 12, and an auxiliary assembly is provided on the pressing assembly. The pressing assembly includes a hydraulic cylinder 13 fixedly mounted on the tripod plate 12, a positioning plate 35 is fixedly mounted on the output end of the hydraulic cylinder 13, a bearing 36 is fixedly mounted on the lower end surface of the positioning plate 35, a screw rod 14 is fixedly mounted on the bearing 36, an L-shaped frame plate 15 is fixedly mounted on the lower end surface of the tripod plate 12, a spiral hole 16 is opened on the L-shaped frame plate 15, and a pressing plate 17 is fixedly mounted on the bottom end of the screw rod 14;

[0037] The lower end surface of the lower pressing plate 17 is fixedly installed with a connecting vertical rod 18, and the lower end surface of the connecting vertical rod 18 is fixedly installed with a mounting plate 19. The side end surface of the mounting plate 19 is provided with a plurality of connecting cross bars 20. The end of the connecting cross bar 20 is fixedly installed with a cleaning arc plate 21. The cleaning arc plate 21 includes a main arc plate 2101, and mounting grooves 2102 are provided at both ends of the main arc plate 2101. A secondary arc plate 2103 is rotatably installed inside the two mounting grooves 2102. The spiral rod 14 is movably connected to the spiral hole 16. The position of the spiral rod 14 is directly above the spiral hole 16. The outer side of the cleaning arc plate 21 is in contact with the inner side of the reaction tank 1;

[0038] The lower end surface of the lower pressure plate 17 is fixedly installed with a first electric push rod 22, the output end of the first electric push rod 22 is fixedly connected to an adjusting plate 23, the outer side surface of the adjusting plate 23 is provided with a rotation groove 24, the inner side surface of the rotation groove 24 is rotatably installed with an adjusting rod 25, the upper end surface of the connecting cross bar 20 is fixedly connected with a U-shaped frame 26, the outer side surface of the mounting plate 19 is provided with a rotation groove 27, the interior of the rotation groove 27 is provided with a reset groove 28, the interior of the reset groove 28 is rotatably installed with a reset shaft 29, the interior of the reset groove 28 and on the outer side of the reset shaft 29 is fixedly connected It is connected to a torsion spring 30, and the end of the adjusting rod 25 away from the rotating groove 24 is rotatably connected to the U-shaped frame 26. The adjusting rod 25 is arranged tilted, and the end of the reset shaft 29 away from the reset groove 28 is fixedly mounted on the connecting cross bar 20. The end of the torsion spring 30 away from the reset groove 28 is fixedly connected to the connecting cross bar 20, wherein the connecting vertical rod 18 is slidingly connected to the adjusting plate 23, and the adjusting plate 23 slides on the upper limit of the connecting vertical rod 18. The torsion force of the torsion spring 30 is used to ensure that the connecting cross bar 20 is in a stable state after the angle is adjusted and will not shake left and right.

[0039] The auxiliary component includes a first connecting frame 31 fixedly mounted on the secondary arc plate 2103, a pull rod 32 is rotatably mounted inside the first connecting frame 31, a second electric push rod 33 is fixedly mounted on the outer side of the connecting cross bar 20, and a second connecting frame 34 is fixedly mounted on the output shaft of the second electric push rod 33. The pull rod 32 is rotatably connected to the second connecting frame 34 at one end away from the first connecting frame 31, and the second connecting frame 34 is slidably mounted on the connecting cross bar 20, wherein the number of the second connecting frames 34 on the connecting cross bar 20 is two, and the two second connecting frames 34 can be installed together, and the two second connecting frames 34 slide at the upper limit position on the connecting cross bar 20, and the two second electric push rods 33 work synchronously.

[0040] Working principle:

[0041] During use, the sludge pump 5 is activated, and the sludge in the storage barrel 2 is discharged into the interior of the reaction tank 1 through the discharge pipe 7 via the input pipe 6. Then, a certain amount of ammonium chloride and sodium bicarbonate are added to the reaction tank 1 in sequence through the existing dosing device. The dosage of the added chemicals is adjusted based on the results of the real-time monitoring online pH meter and online ammonia nitrogen tester to ensure that the initial ammonia nitrogen concentration is similar to the actual influent concentration and the pH value meets the alkalinity requirements of the nitrification process. The timed sampling is completed by the timed feeder 9, and then the sample to be tested in the centrifuge tube 11 is tested according to the phenol disulfonic acid spectrophotometric method (GB7480-1987) for the determination of nitrate nitrogen in water quality. A linear regression is performed based on the change in nitrate nitrogen concentration in the mixed solution (with time as the horizontal axis and nitrate nitrogen concentration as the vertical axis), which can be used to obtain the nitrification curve of the sludge system. The nitrification rate of the system can then be calculated based on the sludge concentration of the sludge system.

[0042] When the sludge and medicine in the reaction tank 1 need to be stirred, the adjustment plate 23 is driven to descend by the first electric push rod 22, and the adjustment plate 23 will cooperate with the U-shaped frame 26 on the connecting cross bar 20 through the adjustment rod 25 in the rotating groove 24, so that the connecting cross bar 20 can cooperate with the reset shaft 29 and the reset groove 28, so that the connecting cross bar 20 can rotate around the reset shaft 29 as the center, and the connecting cross bar 20 in the horizontal state can be rotated at an angle. Through the cooperation between the connecting cross bar 20 and the cleaning arc plate 21, a stirring member is formed, and then the positioning plate 35 is reciprocated and lifted by the hydraulic cylinder 13. The cooperation between the screw rod 14 and the bearing 36, and the cooperation between the screw rod 14 and the spiral hole 16, can drive the connecting cross bar 20 and the cleaning arc plate 21 to reciprocate and lift in the cement pool. By connecting the cross bar 20 and the cleaning arc plate 21, the full reaction of the sludge and medicine in the reaction tank 1 can be effectively ensured;

[0043] After the reactants in the reaction tank 1 are discharged, in order to prevent the residues in the reaction tank 1 from affecting the new test of the sludge, there is no need to adjust the angle of the connecting cross bar 20. At this time, the connecting cross bar 20 and the cleaning arc plate 21 form a cleaning part, and water is added to the reaction tank 1 through an external water pipe. After a certain amount of water is added, the hydraulic cylinder 13 drives the hydraulic cylinder 13 to reciprocate and drive the positioning plate 35 to rise and fall. By utilizing the cooperation between the screw rod 14 and the bearing 36, and the cooperation between the screw rod 14 and the spiral hole 16, the connecting cross bar 20 and the cleaning arc plate 21 can be driven to reciprocate and rise and fall in the cement pool. The cleaning arc plate 21 is fitted with the inner wall of the reaction tank 1 to fall off the sludge adhering to the inner wall of the reaction tank 1. The fallen sludge will merge with the water in the reaction tank 1 and finally be discharged through the sewage pipe.

[0044] In order to make the stirring effect of the stirring piece formed by the connecting cross bar 20 and the cleaning arc plate 21 better, the second connecting frame 34 is driven by the second electric push rod 33 to move horizontally on the connecting cross bar 20, and the second connecting frame 34 will cooperate with the first connecting frame 31 through the pulling rod 32, thereby pulling the secondary arc plate 2103 on the main arc plate 2101 to rotate at an angle, and by changing the shape of the cleaning arc plate 21, a new stirring piece is formed by the cleaning arc plate 21 and the connecting cross bar 20.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An activated sludge denitrification and phosphorus removal performance testing and analysis device, comprising a reaction tank (1), a storage barrel (2) and a conveyor belt (3), characterized in that: A mounting base (4) is provided between the reaction tank (1) and the storage barrel (2); a sludge pump (5) is fixedly mounted on the mounting base (4); an input pipe (6) is fixedly connected to the sludge pump (5); and an output end of the sludge pump (5) is fixedly connected to a discharge pipe (7); A mounting frame (8) is fixedly mounted on the side end surface of the reaction tank (1), a timing material remover (9) is fixedly mounted on the mounting frame (8), one end of the timing material remover (9) is connected to the reaction tank (1), and the other end of the timing material remover (9) is fixedly connected to a discharge pipe (10); A plurality of centrifuge tubes (11) are provided on the conveyor belt (3); A tripod plate (12) is fixedly mounted on the reaction pool (1), a pressing component is provided on the tripod plate (12), and an auxiliary component is provided on the pressing component; The down-pressing assembly comprises a hydraulic cylinder (13) fixedly mounted on a tripod plate (12), a positioning plate (35) fixedly mounted on the output end of the hydraulic cylinder (13), a bearing (36) fixedly mounted on the lower end surface of the positioning plate (35), a screw rod (14) fixedly mounted on the bearing (36), an L-shaped frame plate (15) fixedly mounted on the lower end surface of the tripod plate (12), a screw hole (16) provided on the L-shaped frame plate (15), a down-pressing plate (17) fixedly mounted on the bottom end of the screw rod (14), a connecting vertical rod (18) fixedly mounted on the lower end surface of the down-pressing plate (17), a mounting plate (19) fixedly mounted on the lower end surface of the connecting vertical rod (18), a side end surface of the mounting plate (19) provided with a plurality of connecting cross rods (20), and a cleaning arc plate (21) fixedly mounted on the end of the connecting cross rod (20); A first electric push rod (22) is fixedly mounted on the lower end surface of the lower pressure plate (17), an output end of the first electric push rod (22) is fixedly connected to an adjustment plate (23), an outer side surface of the adjustment plate (23) is provided with a rotation groove (24), an inner side surface of the rotation groove (24) is rotatably mounted with an adjustment rod (25), an upper end surface of the connecting cross bar (20) is fixedly connected to a U-shaped frame (26), an outer side surface of the mounting plate (19) is provided with a rotation groove (27), an interior of the rotation groove (27) is provided with a reset groove (28), a reset shaft (29) is rotatably mounted inside the reset groove (28), and a torsion spring (30) is fixedly connected inside the reset groove (28) and on the outside of the reset shaft (29).

2. The activated sludge denitrification and phosphorus removal performance testing and analysis equipment according to claim 1, characterized in that: The cleaning arc plate (21) comprises a main arc plate (2101), both ends of the main arc plate (2101) are provided with mounting grooves (2102), and auxiliary arc plates (2103) are rotatably mounted inside the two mounting grooves (2102).

3. The activated sludge denitrification and phosphorus removal performance testing and analysis equipment according to claim 2, characterized in that: The spiral rod (14) is movably connected to the spiral hole (16), and the position of the spiral rod (14) is directly above the spiral hole (16). The outer side surface of the cleaning arc plate (21) is in contact with the inner side surface of the reaction tank (1).

4. The activated sludge denitrification and phosphorus removal performance testing and analysis equipment according to claim 1, characterized in that: The end of the adjusting rod (25) away from the rotating groove (24) is rotatably connected to the U-shaped frame (26), the adjusting rod (25) is arranged obliquely, the end of the reset shaft (29) away from the reset groove (28) is fixedly mounted on the connecting cross bar (20), and the end of the torsion spring (30) away from the reset groove (28) is fixedly connected to the connecting cross bar (20).

5. The activated sludge denitrification and phosphorus removal performance testing and analysis equipment according to claim 2, characterized in that: The auxiliary component includes a first connecting frame (31) fixedly mounted on the secondary arc plate (2103), a pull rod (32) is rotatably mounted inside the first connecting frame (31), a second electric push rod (33) is fixedly mounted on the outer side surface of the connecting cross bar (20), and a second connecting frame (34) is fixedly mounted on the output shaft of the second electric push rod (33).

6. The activated sludge denitrification and phosphorus removal performance testing and analysis equipment according to claim 5, characterized in that: One end of the pulling rod (32) away from the first connecting frame (31) is rotatably connected to the second connecting frame (34), and the second connecting frame (34) is slidably mounted on the connecting cross bar (20).

Images