Sewage treatment SV30 detection device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment SV30 detection device which comprises a measuring cylinder, an ultrasonic distance measuring probe and a liquid inlet pipe. An opening is formed in one side of the measuring cylinder, a check gate is installed through the opening in a sliding and sealing mode, a threaded hole is formed in one side of the check gate, the check gate is connected with a lead screw through the threaded hole, the upper end of the lead screw is connected with a servo motor, and the top of the check gate is driven by the servo motor to move between the bottom and the top of the measuring cylinder; a liquid inlet pipe is arranged on one side above the measuring cylinder, an ultrasonic distance measuring probe is arranged right above the measuring cylinder, a cleaning water pipe is arranged on the other side above the measuring cylinder, and a nozzle is arranged at the front end of the cleaning water pipe. The SV30 online detection device is simple in structure and convenient to use, not only can online detection of SV30 be achieved in the using process, but also the device can be cleaned, cleaning water can be collected, and convenience is brought to actual production detection.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment SV30 detection device. Background Art

[0002] In the field of sewage treatment, the sludge settling ratio (SV) refers to the volume ratio (%) of the precipitated sludge to the mixed liquid in the aeration tank after the mixed liquid has been statically settled for 30 minutes in a 1000mL measuring cylinder. Because the sludge can generally reach or approach the maximum density after 30 minutes of sedimentation, this time is generally used as the standard time for measuring this indicator, and it is often expressed as SV30.

[0003] Generally speaking, the SV30 in the biochemical pool is between 20% and 40%. It is often used to control the discharge of excess sludge and promptly respond to abnormal phenomena such as sludge swelling. It is an important parameter for controlling the stable operation of the sewage treatment process. In addition, SV30 can also be combined with the sludge concentration MLSS. The ratio of sludge concentration MLSS to SV30 can be used to express the sludge settling performance index (sludge index) SVI, which is one of the important indicators for evaluating activated sludge.

[0004] There are existing methods for automatic detection of SV30, but due to cost constraints, the detection of SV30 in actual production is still mainly based on manual sampling and detection, which not only increases labor intensity, but also has certain delays and potential safety hazards, which is not conducive to safe production and real-time regulation of production processes. The limitations in actual production are increasing day by day. Therefore, a simple, direct, economical and efficient SV30 detection device is an issue that needs to be urgently addressed. Utility Model Content

[0005] The purpose of the utility model is to provide a sewage treatment SV30 detection device in view of the above-mentioned deficiencies in the prior art, so as to achieve the purpose of simple, direct, economical and efficient detection of SV30.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sewage treatment SV30 detection device, comprising a measuring cylinder, an opening is provided on one side of the measuring cylinder, a weir gate is slidably and sealably installed at the opening, the movable range of the top of the weir gate is located between the bottom and the top of the measuring cylinder, the weir gate is in slidably and sealably contact with the bottom of the measuring cylinder, a liquid inlet pipe is provided on one side above the measuring cylinder, and an ultrasonic ranging probe is installed directly above the measuring cylinder.

[0007] Furthermore, slide grooves are arranged on both sides of the opening, and slide bars are arranged on both sides of the weir gate, and the slide bars are slidably and sealingly connected to the slide grooves.

[0008] Furthermore, the slide bar is provided with a threaded hole on one side, a lead screw is connected through the threaded hole, and the upper end of the lead screw is connected to the servo motor.

[0009] Furthermore, a cleaning water pipe is provided on the other side above the measuring cylinder, and a nozzle is installed at the outlet of the cleaning water pipe.

[0010] Furthermore, a liquid collecting tank is arranged below the measuring cylinder, and a drain pipe is arranged at the bottom of the liquid collecting tank.

[0011] Furthermore, an electric control valve A is installed on the liquid inlet pipe, an electric control valve B is installed on the cleaning water pipe, and a remote I / O control box is provided. The electric control valve A, the electric control valve B, the ultrasonic ranging probe and the servo motor are respectively connected to the remote I / O control box, and the remote I / O control box is connected to the remote terminal.

[0012] Furthermore, it also includes a mounting frame, which includes a base plate, a support plate is arranged on one side of the base plate, and a mounting plate is connected to the support plate, and the mounting plate is located above the base plate; the measuring cylinder is located between the mounting plate and the base plate and is connected to the support plate, the liquid inlet pipe and the cleaning water pipe pass through the support plate and are located above the measuring cylinder, the ultrasonic ranging probe, the servo motor and the remote I / O control box are arranged and installed on the mounting plate, and the liquid collecting tank is arranged on the base plate.

[0013] Furthermore, a mounting box is arranged on the mounting plate, the ultrasonic ranging probe, the servo motor and the remote I / O control box are all located in the mounting box, and heat dissipation holes are arranged on the side of the mounting box.

[0014] Beneficial effects of the utility model:

[0015] 1. It can realize convenient detection of SV30, and can realize automatic detection during the process, with low price and cost, which is convenient for use in production detection;

[0016] 2. It can realize automatic cleaning of the device, making it more convenient to use;

[0017] 3. Wastewater generated during the testing process can be effectively collected to avoid causing pollution to the surrounding area, which is beneficial to the maintenance of the factory environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the installation box of the utility model;

[0020] Figure 3 It is a schematic diagram of the installation structure of the weir gate of the utility model.

[0021] The names corresponding to the marks in the figure are:

[0022] 1. Mounting frame; 11. Bottom plate; 12. Support plate; 13. Mounting plate; 2. Measuring tube; 21. Cylinder body; 22. Opening; 221. Slideway; 23. Weir gate; 231. Slide bar; 232. Threaded hole; 3. Liquid inlet pipe; 31. Electric control valve A; 4. Cleaning water pipe; 41. Electric control valve B; 42. Nozzle; 5. Mounting box; 51. Heat dissipation hole; 6. Liquid collecting tank; 61. Drain pipe; 7. Ultrasonic ranging probe; 8. Servo motor; 81. Screw; 9. Remote I / O control box. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] Embodiments of the present utility model:

[0025] like Figure 1-3 As shown, in the embodiment, a mounting frame 1 is provided in the online detection device, a base plate 11 is provided in the mounting frame 1, a support plate 12 is installed on one side of the base plate 11, and a mounting plate 13 is installed on the side above the support plate 12, and the mounting plate 13 is located above the base plate 11.

[0026] A measuring cylinder 2 is fixedly mounted on the support plate 12, the measuring cylinder 2 is located between the base plate 11 and the mounting plate 13, and a liquid inlet pipe 3 and a cleaning water pipe 4 are mounted through the support plate 12, both of which extend to the top of the measuring cylinder 2, an electric control valve A31 is mounted on the liquid inlet pipe 3, an electric control valve B41 is mounted on the cleaning water pipe 4, and a nozzle 42 is mounted at the outlet of the cleaning water pipe 4; an opening 22 is provided on one side of the cylinder body 21 of the measuring cylinder 2, and a weir gate 23 is slidably and sealedly mounted through the opening 22, wherein slide grooves 221 are provided on both sides of the opening 22, and slide bars 231 are provided on both sides of the weir gate 23, the slide grooves 221 are sealingly and slidably connected to the slide bar 231, a threaded hole 232 is provided in the slide bar 231 on one side, and is connected to a lead screw 81 through the threaded hole 232, and the lead screw 81 is connected to the mounting box 5 on the mounting plate 13.

[0027] A heat dissipation hole 51 is provided on the installation box 5, and a servo motor 8 is installed in the installation box 5, the servo motor 8 is connected to the lead screw 81, and an ultrasonic ranging probe 7 and a remote I / O control box 9 are installed in the installation box 5, the ultrasonic ranging probe 7 does not interfere with the liquid inlet pipe 3 and the cleaning water pipe 4 in space, and an electric control valve A31, an electric control valve B41, an ultrasonic ranging probe 7 and a servo motor 8 are provided and are connected to the remote I / O control box 9 respectively, and the remote I / O control box 9 is wirelessly connected to the remote terminal.

[0028] A liquid collecting tank 6 is installed on the bottom plate 11 below the measuring tube 2 , and an emptying pipe 61 is arranged at the bottom of the liquid collecting tank 6 , and the emptying pipe 61 extends into the biological pool.

[0029] The principle of this utility model is:

[0030] When the utility model is in use, the liquid inlet pipe 3 and the cleaning water pipe 4 are respectively connected to the delivery pump, and the delivery pump of the liquid inlet pipe 3 is installed in the biological pool, and the delivery pump of the cleaning water pipe 4 is installed in the cleaning water pool. At the same time, both delivery pumps are connected to the remote I / O control box 9, and SV30 detection can be carried out at this time.

[0031] At the beginning of the test, the electric control valve A31 is opened, and the delivery pump of the liquid inlet pipe 3 is started to infuse liquid into the measuring cylinder 2. At this time, since the weir gate 23 is at the bottom after the previous test process is completed (the top of the weir gate 23 is flush with the bottom of the measuring cylinder 2. It should be noted that the sliding sealing contact between the bottom plate 11 and the weir gate 23 can be achieved by setting a rubber strip on the outside of the bottom plate 11), the inflowing mixed liquid will not be collected. This operation is also to empty the residual mixed liquid in the liquid inlet pipe 3, so as to extract fresh mixed liquid, thereby ensuring the accuracy of the measurement.

[0032] After the liquid inlet pipe 3 has been inletting liquid for a period of time, the servo motor 8 starts and drives the weir gate 23 to rise through the screw 81. There is no need to stop the liquid inletting during the rising process of the weir gate 23. When the weir gate 23 rises to the top, part of the mixed liquid is also collected in the measuring cylinder 2. The start time of the delivery pump is set. When the mixed liquid overflows in the measuring cylinder 2 and lasts for a period of time, the electric control valve A31 and the delivery pump of the liquid inlet pipe 3 are closed, and the liquid inletting is stopped. At this time, it is allowed to stand. During the standing process, the ultrasonic ranging probe 7 can measure the height of the liquid level, which can be recorded as h1. After standing for 30 minutes, subsequent operations are performed.

[0033] After standing for 30 minutes, the servo motor 8 drives the weir gate 23 to descend. During the descent, the supernatant flows out from the weir gate 23. As the weir gate 23 continues to descend, the supernatant also flows out continuously. During this process, the ultrasonic ranging probe 7 measures the position of the liquid surface in real time. When the weir gate 23 reaches the interface between the supernatant and the precipitated sludge, the supernatant flows out. At this time, the detection value of the ultrasonic ranging probe 7 will remain unchanged for a certain period of time (although the weir gate 23 is still descending at this time, the collapse of the precipitated sludge is slow and takes a certain amount of time). At this time, the stable value is recorded and recorded as h2; in actual use, the distance between the bottom of the measuring tube 2 and the ultrasonic ranging probe 7 is certain and recorded as H, so the sludge settling ratio of the mixed liquid at 30 minutes can be obtained, that is:

[0034] SV30=(H-h2) / (H-h1)*100%

[0035] This formula can be further simplified. In actual use, (H-h1) is basically a constant, so it is only necessary to measure the height of h2 to detect the sludge settling ratio.

[0036] After the detection is completed, the remote I / O controller transmits the detection signal to the remote terminal, thereby realizing online detection of SV30. At the same time, the device starts the cleaning program. At this time, the electric control valve B41 on the cleaning water pipe 4 is opened, and the delivery pump connected to the cleaning water pipe 4 is turned on. The cleaning water is sprayed out from the nozzle 42, so that the measuring cylinder 2 can be cleaned. The sewage generated by the cleaning and the liquid in the whole process can be collected in the liquid collecting tank 6 and directly discharged into the biological pool through the drain pipe 61 at the bottom of the liquid collecting tank 6.

Claims

1. A sewage treatment SV30 detection device, characterized in that: The invention comprises a measuring cylinder (2), wherein an opening (22) is arranged on one side of the measuring cylinder (2), a weir gate (23) is slidably and sealably installed at the opening (22), the movable range of the top of the weir gate (23) is located between the bottom and the top of the measuring cylinder (2), the weir gate (23) is in slidably and sealably contact with the bottom of the measuring cylinder (2), a liquid inlet pipe (3) is arranged on one side above the measuring cylinder (2), and an ultrasonic distance measuring probe (7) is installed directly above the measuring cylinder (2).

2. A sewage treatment SV30 detection device according to claim 1, characterized in that: Slide grooves (221) are arranged on both sides of the opening (22), and slide bars (231) are arranged on both sides of the weir gate (23), and the slide bars (231) are slidably and sealingly connected to the slide grooves (221).

3. A sewage treatment SV30 detection device according to claim 2, characterized in that: The slide bar (231) is provided with a threaded hole (232) extending therethrough on one side, a lead screw (81) is connected via the threaded hole (232), and the upper end of the lead screw (81) is connected to the servo motor (8).

4. A sewage treatment SV30 detection device according to claim 1, characterized in that: A cleaning water pipe (4) is arranged on the other side above the measuring cylinder (2), and a nozzle (42) is installed at the outlet of the cleaning water pipe (4).

5. A sewage treatment SV30 detection device according to claim 1, characterized in that: A liquid collecting tank (6) is arranged below the measuring cylinder (2), and an emptying pipe (61) is arranged at the bottom of the liquid collecting tank (6).

6. A sewage treatment SV30 detection device according to any one of claims 1 to 5, characterized in that: An electric control valve A (31) is installed on the liquid inlet pipe (3), an electric control valve B (41) is installed on the cleaning water pipe (4), and a remote I / O control box (9) is provided. The electric control valve A (31), the electric control valve B (41), the ultrasonic distance measuring probe (7) and the servo motor (8) are respectively connected to the remote I / O control box (9), and the remote I / O control box (9) is connected to a remote terminal.

7. A sewage treatment SV30 detection device according to claim 6, characterized in that: The invention also comprises a mounting frame (1), wherein the mounting frame (1) comprises a base plate (11), a support plate (12) is arranged on one side of the base plate (11), a mounting plate (13) is connected to the support plate (12), and the mounting plate (13) is located above the base plate (11); a measuring cylinder (2) is located between the mounting plate (13) and the base plate (11) and is connected to the support plate (12); a liquid inlet pipe (3) and a cleaning water pipe (4) pass through the support plate (12) and are located above the measuring cylinder (2); an ultrasonic distance measuring probe (7), a servo motor (8) and a remote I / O control box (9) are arranged and mounted on the mounting plate (13), and a liquid collecting tank is arranged on the base plate (11).

8. A sewage treatment SV30 detection device according to claim 7, characterized in that: An installation box (5) is arranged on the installation plate (13), and the ultrasonic distance measuring probe (7), the servo motor (8) and the remote I / O control box (9) are all located in the installation box (5), and heat dissipation holes (51) are arranged on the side of the installation box (5).

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