Foam level monitoring device for aerobic reaction tank

Abstract

The invention discloses a foam liquid level monitoring device for an aerobic reaction tank, comprising a bracket, a monitoring plate, a trigger plate and a monitoring mechanism; the bracket is arranged above the aerobic reaction tank; the monitoring plate is horizontally suspended in the aerobic reaction tank and connected to the bracket through a first rope; the trigger plate is arranged above the monitoring plate and parallel to the monitoring plate; the monitoring mechanism is arranged on the bracket and connected to the trigger plate through a second rope; the monitoring device of the invention can monitor the real liquid level of bubbles in the aerobic reaction tank in real time and effectively to prevent the bubbles from overflowing out of the aerobic reaction tank and causing environmental accidents, and the device has a simple structure, easy operation and high intelligence; in addition, the protective cover of the invention is conical, so that the lower part of the protective cover collects bubbles in a large area, and after the bubbles reach the narrower part of the upper part, the bubbles are compressed, thereby accelerating the rise of the bubbles, and also increasing the kinetic energy of the bubble movement, so that the monitoring plate can be more easily supported, thereby more effectively and reliably alarming.

Description

Technical Field

[0001] The invention relates to the technical field of garbage incineration power generation, in particular to a foam liquid level monitoring device for an aerobic reaction tank. Background Art

[0002] The treatment process of landfill leachate generally includes pretreatment, biochemical treatment and membrane treatment. Pretreatment is to separate suspended matter, silt and other impurities in the leachate, and adjust the water quality and quantity, which is conducive to subsequent treatment; biochemical treatment mainly uses microorganisms to decompose organic matter in the leachate; membrane treatment process generally filters impurities, organic matter and salt that have not been degraded in the biochemical stage, and finally achieves standard discharge. The biochemical treatment process is generally divided into two stages: anaerobic and aerobic. The anaerobic treatment stage is mainly to reduce the COD in the leachate, and the aerobic treatment stage is mainly to remove nitrogen and phosphorus from the leachate. Aerobic reaction requires a large amount of air to be blown into the aerobic reaction tank by a fan. The blown air is converted into small bubbles through the aeration equipment arranged in the tank, which is conducive to the aerobic bacteria in the pool to absorb oxygen and increase the activity of the bacteria. When the sludge concentration in the aerobic reaction tank is higher than the process requirement range, and the dissolved oxygen is lower than the process requirement range for a long time, the growth of aerobic bacteria will be inhibited, and the filamentous bacteria will multiply in large quantities. At this time, a large amount of foam will be generated in the aerobic reaction tank, and it is not easy to break. It is easy to cause environmental accidents such as a large amount of foam overflowing the tank, so the actual liquid level of the foam needs to be reflected in time. Because the buoyancy of the foam in the aerobic reaction tank is extremely small and the surface is uneven, traditional float sensors and liquid level sensors cannot be used to monitor the actual foam level. Summary of the invention

[0003] Aiming at the problem that the conventional technology cannot monitor the real liquid level of foam in an aerobic reaction tank, the present invention provides a foam liquid level monitoring device for an aerobic reaction tank.

[0004] The technical solution adopted by the present invention is: a foam level monitoring device for an aerobic reaction tank, comprising:

[0005] A support is arranged above the aerobic reaction tank;

[0006] The monitoring board is horizontally suspended in the aerobic reaction tank, connected to the support through a first rope, and can move upward driven by the foam in the aerobic reaction tank;

[0007] The trigger plate is arranged above the monitoring plate and parallel to the monitoring plate, and can move upwards under the drive of the monitoring plate;

[0008] The monitoring mechanism is arranged on the bracket and connected to the trigger plate through a second rope, and is used to monitor the displacement of the trigger plate.

[0009] Working principle: When the bubbles in the aerobic reaction tank rise sharply, the liquid level of the bubbles rises. After the bubbles touch the bottom of the monitoring plate, the bubbles continue to rise and hold the monitoring plate to rise synchronously. After the monitoring plate touches the bottom of the trigger plate, the monitoring plate holds the trigger plate to rise synchronously. At this time, the monitoring mechanism detects the rising movement of the trigger plate, indicating that the bubble level in the aerobic reaction tank is too high, so as to remind the staff to deal with it accordingly, so as to avoid the bubbles overflowing from the aerobic reaction tank and causing environmental accidents. The present invention has a simple structure, easy operation, high intelligence, and can monitor the bubble level in real time and effectively.

[0010] Furthermore, the monitoring mechanism is a micro-travel switch. The micro-travel switch selects a normally closed contact for control, and the weight of the trigger plate can just trigger the micro-travel switch to open; when the trigger plate is rising, the gravity of the trigger plate no longer acts on the trigger head of the micro-travel switch, and finally the micro-travel switch is closed.

[0011] Furthermore, it also includes a buzzer alarm, which is electrically connected to the micro-travel switch. After the micro-travel switch is closed, the buzzer alarm is triggered to warn, and the staff is reminded auditorily that the bubble level in the aerobic reaction tank is too high, so that corresponding measures can be taken. Multiple buzzer alarms can be set up, which can be set up on site or in a studio, so that the staff can monitor remotely. The distance between the trigger plate and the top of the aerobic reaction tank can be adjusted manually. The closer to the top of the aerobic reaction tank, the higher the foam alarm level is triggered, and the farther from the top of the aerobic reaction tank, the lower the foam alarm level is triggered. The position can be determined by the actual operation situation.

[0012] Furthermore, a guide rod is vertically arranged on the bracket, and the guide rod passes through the trigger plate and the monitoring plate. Since the foam in the aerobic reaction tank will flow, the monitoring plate will move horizontally, which will eventually cause the trigger plate and the monitoring plate to be misaligned and unable to contact, and the alarm cannot be completed normally. For this reason, the present invention is provided with a guide rod that passes through the trigger plate and the monitoring plate, and the trigger plate and the monitoring plate are slidably connected to the guide rod, and the guide rod plays a guiding role. Therefore, the trigger plate and the monitoring plate can only slide vertically relative to the guide rod, which ensures that the monitoring plate and the trigger plate can effectively contact and avoid misalignment between the two.

[0013] Furthermore, the guide rod is a stainless steel tube, which has the advantages of high strength, corrosion resistance and rust resistance, and is very suitable for use in the harsh working conditions of the aerobic reaction tank.

[0014] Furthermore, the area of ​​the monitoring plate is larger than that of the trigger plate; due to the large area of ​​the monitoring plate, the contact area between the monitoring plate and the bubbles is larger, and the thrust of the bubbles exerted on the monitoring plate is greater, so that the monitoring plate can easily lift the trigger plate, so that it can effectively monitor the liquid level of the bubbles in the aerobic reaction tank in real time, making the monitoring real-time, effective and accurate.

[0015] Furthermore, the distance between the trigger plate and the monitoring plate is 20mm to 30mm. The inventors observed in actual practice that the distance should not be too large or too small. If the distance is too large, the trigger plate will crush a small part of the bubbles during the rising process. Since the bubbles are not smooth on the surface, false alarms may occur if the distance is too small. Neither of them can accurately monitor the actual liquid level of the bubbles. For this reason, the inventors of this application adjusted the distance between the trigger plate and the monitoring plate to 20mm to 30mm in a large number of practices.

[0016] Furthermore, the monitoring plate is made of a foam plastic plate, and the trigger plate is made of a stainless steel sheet. The foam plastic plate has a low density and a light weight, so that the bubbles can easily support the monitoring plate without being crushed; the weight of the trigger plate made of the stainless steel sheet is just enough to trigger the micro travel switch to disconnect.

[0017] Furthermore, a canopy is provided on the top of the bracket. The bracket is provided with electrical equipment, and the canopy plays a role of water protection, thereby preventing safety accidents caused by short circuit damage to the electrical equipment.

[0018] Furthermore, a shield is provided on the frame, and the monitoring board and the trigger board are arranged in the shield, and the lower part of the shield is conical. The shield is wide at the lower part and narrow at the upper part, so that the bubbles are collected in a large area at the lower part of the shield. When the bubbles reach the narrower part at the upper part, the bubbles are compressed, so that the bubbles rise faster, and the kinetic energy of the bubbles can be increased, so that the monitoring board can be lifted more easily, thereby providing a more effective and reliable alarm.

[0019] The beneficial effects of the present invention are:

[0020] 1. The monitoring device of the present invention can monitor the real liquid level of bubbles in the aerobic reaction tank in real time and effectively to prevent bubbles from overflowing out of the aerobic reaction tank and causing environmental accidents. It has a simple structure, easy operation and high intelligence.

[0021] 2. The present invention is provided with a guide rod that passes through the trigger plate and the monitoring plate. The trigger plate and the monitoring plate are slidably connected to the guide rod, and the guide rod plays a guiding role; therefore, the trigger plate and the monitoring plate can only slide vertically relative to the guide rod, which ensures that the monitoring plate and the trigger plate can effectively contact and avoid misalignment between the two.

[0022] 3. The monitoring plate of the present invention has a large area, so the contact area between the monitoring plate and the bubbles is larger, and the thrust of the bubbles on the monitoring plate is greater, so that the monitoring plate can easily lift the trigger plate, so that it can effectively monitor the liquid level of the bubbles in the aerobic reaction tank in real time, making the monitoring real-time, effective and accurate.

[0023] 4. The shield of the present invention is wide at the bottom and narrow at the top, so that bubbles can be collected in a large area at the bottom of the shield. After the bubbles reach the narrower part at the top, they are compressed, thereby accelerating their rise. At the same time, the kinetic energy of the bubble movement can also be increased, making it easier to hold up the monitoring board, thereby providing a more effective and reliable alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] The markings in the figure are:

[0026] 1. Bracket; 2. Monitoring board; 3. Trigger board; 4. Monitoring mechanism; 5. Guide rod; 6. Canopy; 7. Protective cover;

[0027] 201. First rope; 301. Second rope. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “front”, “up”, “down”, “left”, “right”, “vertical” and “horizontal” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The present invention is further described below in conjunction with the accompanying drawings.

[0031] Embodiment 1

[0032] Reference Figure 1 The foam level monitoring device for an aerobic reaction tank of the present invention comprises a bracket 1, a monitoring plate 2, a trigger plate 3 and a monitoring mechanism 4; the bracket 1 is arranged above the aerobic reaction tank; the monitoring plate 2 is horizontally suspended in the aerobic reaction tank, connected to the bracket 1 through a first rope 201, and can move upward under the drive of the foam in the aerobic reaction tank; the trigger plate 3 is arranged above the monitoring plate 2, parallel to the monitoring plate 2, and can move upward under the drive of the monitoring plate; the monitoring mechanism 4 is arranged on the bracket 1, connected to the trigger plate 3 through a second rope 301, and is used to monitor the displacement of the trigger plate.

[0033] Working principle: When the bubbles in the aerobic reaction tank rise sharply, the liquid level of the bubbles rises. After the bubbles contact the bottom of the monitoring plate, the bubbles continue to rise and hold up the monitoring plate to rise synchronously. After the monitoring plate contacts the bottom of the trigger plate, the monitoring plate holds up the trigger plate to rise synchronously. At this time, the monitoring mechanism detects the rising movement of the trigger plate, indicating that the bubble level in the aerobic reaction tank is too high, so as to remind the staff to deal with it accordingly, so as to avoid the bubbles overflowing from the aerobic reaction tank and causing environmental accidents. The present invention has a simple structure, easy operation, and a high degree of intelligence, and can monitor the liquid level of the bubbles in real time and effectively. The distance between the trigger plate and the top of the aerobic reaction tank can be adjusted manually. The closer to the top of the aerobic reaction tank, the higher the trigger foam alarm liquid level, and the farther from the top of the aerobic reaction tank, the lower the trigger foam alarm liquid level. The position can be determined according to the actual operating conditions.

[0034] The monitoring mechanism 4 of this embodiment is a micro-travel switch. The micro-travel switch selects a normally closed contact for control, and the weight of the trigger plate can just trigger the micro-travel switch to open; when the trigger plate is rising, the gravity of the trigger plate no longer acts on the trigger head of the micro-travel switch, and finally the micro-travel switch is closed.

[0035] The present embodiment further comprises a buzzer alarm (not shown in the figure), which is electrically connected to the micro-travel switch. After the micro-travel switch is closed, the buzzer alarm is triggered to give an alarm, thereby audibly reminding the staff that the bubble level in the aerobic reaction tank is too high so that corresponding measures can be taken. Multiple buzzer alarms can be provided, and they can be provided on site or in a studio so that the staff can monitor remotely.

[0036] Reference Figure 1 In this embodiment, the area of ​​the monitoring plate 2 is larger than the area of ​​the trigger plate 3; due to the large area of ​​the monitoring plate, the contact area between the monitoring plate and the bubbles is larger, and the thrust of the bubbles on the monitoring plate is greater, so that the monitoring plate can easily lift the trigger plate, so that it can effectively monitor the liquid level of the bubbles in the aerobic reaction tank in real time, making the monitoring real-time, effective and accurate.

[0037] In this embodiment, the distance between the trigger plate 3 and the monitoring plate 2 is 25 mm. The inventors observed in actual practice that the distance should not be too large or too small. If the distance is too large, the trigger plate will crush a small part of the bubbles during the rising process. Since the bubbles are not smooth on the surface, false alarms may occur if the distance is too small. Neither of them can accurately monitor the actual liquid level of the bubbles. For this reason, the inventors of this application adjusted the distance between the trigger plate and the monitoring plate to 25 mm in a large number of practices.

[0038] The monitoring plate 2 of this embodiment is made of a foam plastic plate, and the trigger plate 3 is made of a stainless steel sheet; the foam plastic plate has a low density and a light weight, so that the bubbles can easily hold up the monitoring plate without being crushed; the weight of the trigger plate made of the stainless steel sheet is just enough to trigger the micro travel switch to disconnect.

[0039] Reference Figure 1 In this embodiment, a canopy 6 is provided on the top of the bracket 1, and the canopy serves to avoid water and prevent safety accidents caused by short circuit damage to electrical equipment.

[0040] Embodiment 2

[0041] Reference Figure 1 On the basis of the first embodiment, the present embodiment has a guide rod 5 vertically arranged on the bracket 1, and the guide rod 5 passes through the trigger plate 3 and the monitoring plate 2. Since the foam in the aerobic reaction tank will flow, the monitoring plate will move horizontally, and eventually the trigger plate and the monitoring plate will be misaligned and unable to contact, and the alarm will not be completed normally. For this reason, the present invention is provided with a guide rod that passes through the trigger plate and the monitoring plate, and the trigger plate and the monitoring plate are slidably connected with the guide rod, and the guide rod plays a guiding role. Therefore, the trigger plate and the monitoring plate can only slide vertically relative to the guide rod, which ensures that the monitoring plate and the trigger plate can effectively contact and avoid misalignment between the two.

[0042] The guide rod 5 of this embodiment is a stainless steel tube, which has the advantages of high strength, corrosion resistance and rust resistance, and is very suitable for use in the harsh working conditions of the aerobic reaction tank.

[0043] Embodiment 3

[0044] Reference Figure 1 On the basis of the first embodiment, the present embodiment is provided with a shield 7 on the frame 1, the monitoring board 2 and the trigger board 3 are arranged in the shield 7, and the lower part of the shield 7 is conical. The shield is wide at the lower part and narrow at the upper part, so that the bubbles are collected in a large area at the lower part of the shield. When the bubbles reach the narrower part at the upper part, the bubbles are compressed, so that the bubbles are accelerated to rise, and the kinetic energy of the bubbles can be increased, so that the monitoring board can be lifted more easily, thereby providing a more effective and reliable alarm.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foam level monitoring device for an aerobic reaction tank, characterized in that: include: A support (1) is arranged above an aerobic reaction tank; a monitoring plate (2) is suspended horizontally in the aerobic reaction tank, connected to the support (1) via a first rope (201), and can move upwards under the drive of foam in the aerobic reaction tank; a trigger plate (3) is arranged above the monitoring plate (2), parallel to the monitoring plate (2), and can move upwards under the drive of the monitoring plate; a monitoring mechanism (4) is arranged on the support (1), connected to the trigger plate (3) via a second rope (301), and is used to monitor the displacement of the trigger plate; the monitoring mechanism (4) is a micro-travel switch; the area of ​​the monitoring plate (2) is larger than the area of ​​the trigger plate (3); and a buzzer alarm is also included, which is electrically connected to the micro-travel switch; a guide rod (5) is vertically arranged on the support (1), and the guide rod (5) passes through the trigger plate (3) and the monitoring plate (2).

2. The foam level monitoring device for an aerobic reaction tank according to claim 1, characterized in that: The guide rod (5) is a stainless steel tube.

3. The foam level monitoring device for an aerobic reaction tank according to claim 1, characterized in that: The distance between the trigger plate (3) and the monitoring plate (2) is 20 mm to 30 mm.

4. The foam level monitoring device for an aerobic reaction tank according to claim 1, characterized in that: The monitoring plate (2) is made of a foam plastic plate, and the trigger plate (3) is made of a stainless steel thin plate.

5. The foam level monitoring device for an aerobic reaction tank according to claim 1, characterized in that: A canopy (6) is provided on the top of the bracket (1).

6. The foam level monitoring device for an aerobic reaction tank according to claim 1, characterized in that: A shield (7) is provided on the bracket (1), and the monitoring plate (2) and the trigger plate (3) are arranged inside the shield (7). The lower part of the shield (7) is conical.

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