CN212301221U - Sludge settlement ratio in-situ automatic detection device - Google Patents

Abstract

The utility model discloses a sludge settlement ratio normal position automatic checkout device, include: the rotary gate is arranged at an opening at the bottom end of the settling pipe; the motor is arranged at the upper end of the sedimentation pipe and is connected with the rotary gate through a connecting shaft; the air pipe is arranged at the top end of the sedimentation pipe and communicated with the sedimentation pipe, and a first electromagnetic valve is arranged on the air pipe and can be connected with an external air source; the exhaust pipe is arranged at the top end of the settling pipe and communicated with the settling pipe, and a second electromagnetic valve is arranged on the exhaust pipe; the first photometer and the second photometer are respectively arranged at different height positions on the outer side of the lower part of the sedimentation pipe, and the light paths of the two adjacent photometers are in reverse parallel; and the control device is respectively electrically connected with the motor, the first electromagnetic valve, the second electromagnetic valve and each photometer, can receive signals of each photometer and controls the action of the motor, the first electromagnetic valve and the second electromagnetic valve according to a set program instruction. The device can overcome human error, and automatic sampling, automatic analysis activated sludge subside characteristic.

Description

Sludge settlement ratio in-situ automatic detection device

Technical Field

The utility model relates to a sewage treatment's check out test set field especially relates to a sludge settling ratio normal position automatic checkout device.

Background

In a sewage treatment plant applying a traditional activated sludge process, a sludge sedimentation ratio (SV) is a conventional index for monitoring sludge concentration and early warning sludge bulking, and generally needs manual timing, fixed-point sampling, standing waiting, calculation and analysis, and is long in time consumption and large in error. The SV is determined by a conventional method, namely, the mixed liquor is taken from the outlet of an aeration tank and placed in a 1L graduated cylinder, and after standing for a period of time (such as 30min), the ratio of the volume occupied by the settled sludge to the volume (1L) of the mixed liquor is SV.

An on-line automatic monitoring device is mostly adopted for measuring the sludge settlement ratio, for example, Chinese invention patent 201810624803.2 discloses an on-line automatic monitoring device for the sludge settlement ratio, a cock which is matched with the inside of a measuring tube is arranged in the measuring tube, the upper end of the cock is connected with a motor through a screw rod, a sample inlet tube which is communicated with the measuring tube is arranged at the lower end of the measuring tube, a sampling control valve is arranged on the sample inlet tube, a sample discharge tube which is communicated with the measuring tube is arranged at one side of the lower end of the measuring tube, a sample discharge control valve is arranged on the sample discharge tube, an internal photometer is arranged at the outer side of the measuring tube, an external photometer is arranged at the outer side of the internal photometer, the motor, the sampling control valve, the sample discharge control valve, the internal photometer and the. However, the problem of high failure rate of the on-line automatic monitoring device for sludge sedimentation ratio is caused by excessive mechanical structures; the sludge is easy to deposit and not easy to clean; the peristaltic action of the pump and the narrow liquid inlet pipeline easily cause the crushing of partial flocs, thereby influencing the test result. Another chinese patent 201911416167.5 discloses a device for on-line monitoring of sludge sedimentation performance, wherein a control pump outlet is connected to a first valve, the first valve is connected to a transparent standard metering container, an infrared photoelectric switch emitting end is fixedly mounted on a mounting bracket, a linear guide rail is fixedly mounted on a column, a slider is mounted on the linear guide rail, a slide seat is fixedly mounted on the slider, the infrared photoelectric switch emitting end is mounted on the slide seat and a nut is mounted on the slide seat, a stepping motor is fixedly mounted on a motor mounting seat, a ball screw is mounted on the column and two ends of the ball screw are mounted on the column through bearing seats, the stepping motor is connected to the ball screw on the column through a coupling and the ball screw is mounted on the nut, and a water outlet hole at the bottom of the transparent standard metering container is connected to an air release. However, the device for monitoring the sludge sedimentation performance on line has the disadvantages that the pipeline is complicated, the floc is easy to block and is not easy to clean; the peristaltic action of the pump and the narrow liquid inlet pipeline easily cause the crushing of partial flocs, thereby influencing the test result.

In conclusion, the existing automatic detection device for sludge sedimentation mostly has the problems that the mechanical structure is complex, the sampling pipeline is narrow and small, and the flocs are damaged by peristaltic extrusion of the pump, so that the accuracy of the measurement result is influenced.

SUMMERY OF THE UTILITY MODEL

Based on the problem that prior art exists, the utility model aims at providing a sludge sedimentation is than normal position automatic checkout device, can solve the online automatic monitoring device that current detection sludge sedimentation is compared, the mechanical structure complicacy that exists and advance the narrow and small and pump wriggling extrusion of pipeline and destroy the floc, influence the problem of the accuracy of testing result.

The utility model aims at realizing through the following technical scheme:

the utility model discloses embodiment provides a sludge settling ratio normal position automatic checkout device, include:

the device comprises a sedimentation pipe, a rotary gate, a motor, a connecting shaft, an air pipe, a first electromagnetic valve, an exhaust pipe, a second electromagnetic valve, at least two photometers and a control device; wherein the content of the first and second substances,

the rotary gate is arranged at the bottom opening of the settling tube and can open or close the bottom opening of the settling tube;

the motor is arranged at the upper end of the settling pipe, is connected with the rotary gate through the connecting shaft and can open or close the rotary gate;

the air pipe is arranged at the top end of the sedimentation pipe and communicated with the sedimentation pipe, the first electromagnetic valve is arranged on the air pipe, and the air pipe can be connected with an external air source;

the exhaust pipe is arranged at the top end of the settling pipe and communicated with the settling pipe, and the second electromagnetic valve is arranged on the exhaust pipe;

the photometers are respectively arranged at different height positions on the outer side of the lower part of the sedimentation pipe, and the light paths of two adjacent photometers are in reverse parallel;

the control device is respectively electrically connected with the motor, the first electromagnetic valve, the second electromagnetic valve and the photometer, can receive signals of the photometers and controls the motor, the first electromagnetic valve and the second electromagnetic valve according to set program instructions.

By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a sludge settling is than normal position automatic checkout device, and its beneficial effect is:

the liquid inlet of the mixed liquid can be completed in situ by the driving of liquid level pressure through arranging a rotary gate controlled by a motor and matching an air pipe and an exhaust pipe, and the determination of a sedimentation result is not influenced because no pump or a thin branch pipeline exists, so that flocs cannot be damaged; the liquid pipeline only has one straight settling tube, has no complex structure, is not easy to block and can stably run for a long time; after each measurement, the interior of the settling tube is washed alternately by water and gas, so that the settling tube is convenient to clean and is not easy to scale by sludge; the equipment has no complex mechanical structure, is convenient to maintain and has low replacement cost of original parts; the control device can realize the automatic measurement of the sludge settleability in a timed and uninterrupted manner. The device simple structure, simple to operate easily maintain, easily wash, can realize the long period steady operation of equipment, can overcome human error during the measurement, automatic sampling, automatic analysis activated sludge subsides the characteristic.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an in-situ automatic detection device for sludge settlement ratio provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of a change of a state in a settling pipe in the automatic in-situ detection method for the sludge settling ratio provided by the embodiment of the present invention, wherein the diagram includes a schematic diagram of the settling pipe being filled with a mixed liquid, a schematic diagram of the settling pipe being in a standing state, a schematic diagram of a state of measuring the sludge settling ratio, a schematic diagram of a state of emptying the settling pipe, and a schematic diagram of a state of measuring the settling pipe again;

fig. 3 is a schematic diagram of a time difference state of photometric signals of two photometers in the automatic sludge settlement ratio in-situ detection device provided by the embodiment of the present invention;

fig. 4 is a schematic view of a mud-water interface state of photometric signals of two photometers in the automatic sludge settlement ratio in-situ detection device provided by the embodiment of the present invention;

the parts corresponding to each mark in the figure are: 1-a settling tube; 2-rotating the gate; 3-connecting the shaft; 4-a motor; 5-air pipe; 6-gas source; 7-a first solenoid valve; 8-an exhaust pipe; 9-a second electromagnetic valve; 10-a first photometer; 11-a second photometer; 12-a control device; 13-liquid crystal display screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.

As shown in FIG. 1, the embodiment of the utility model provides a sludge sedimentation ratio normal position automatic checkout device, include:

the device comprises a sedimentation pipe 1, a rotary gate 2, a motor 4, a connecting shaft 3, an air pipe 5, a first electromagnetic valve 7, an exhaust pipe 8, a second electromagnetic valve 9, at least two photometers and a control device 12; wherein the content of the first and second substances,

the rotary gate 2 is arranged at the bottom opening of the settling pipe 1 and can open or close the bottom opening of the settling pipe 1;

the motor 4 is arranged at the upper end of the settling pipe 1, and the motor 4 is connected with the rotary gate 2 through the connecting shaft 3 and can open or close the rotary gate 2;

the air pipe 5 is arranged at the top end of the settling pipe 1 and communicated with the interior of the settling pipe 1, the first electromagnetic valve 7 is arranged on the air pipe 5, and the air pipe 5 can be connected with an external air source 6;

the exhaust pipe 8 is arranged at the top end of the settling pipe 1 and communicated with the interior of the settling pipe 1, and the second electromagnetic valve 9 is arranged on the exhaust pipe 8;

the photometers 11 are respectively arranged at different height positions on the outer side of the lower part of the settling tube 1, and the light paths of two adjacent photometers are in reverse parallel;

the control device is electrically connected with the motor 4, the first electromagnetic valve 7, the second electromagnetic valve 9 and the photometers respectively, can receive signals of the photometers and can control the motor 4, the first electromagnetic valve 7 and the second electromagnetic valve 9 according to set program instructions.

In the above automatic detection device, the control device is a control device having a liquid crystal display 13.

In the automatic detection device, the sedimentation pipe is a long straight pipe body. The settling tube with the shape has simpler structure and more convenient sampling and cleaning.

The above automatic detection device further comprises: and the air source or the vacuum pump is connected with the air pipe 5. Preferably, the air source can also adopt an aeration branch pipe of the aeration tank. When the vacuum pump is adopted, the sedimentation pipe is lifted, but the bottom of the sedimentation pipe is still below the liquid level, and negative pressure is formed inside the sedimentation pipe through the connected vacuum pump, so that the liquid on the surface of the pool is forced to be lifted to the sedimentation pipe.

Preferably, in the above automatic detection device, two photometers are used, such as a first photometer 10 and a second photometer 11, the first photometer 10 and the second photometer 11 are installed at different heights outside the lower portion of the settling tube 1, and the light paths of the two photometers are antiparallel, so that the first photometer 10 and the second photometer 11 measure photometric signals, and transmit the photometric signals to the control device 12 for recording, and the control device 12 calculates the sludge settling ratio according to the sudden time difference of the photometric signals measured by the first photometer 10 and the second photometer 11 and the position and distance between the first photometer 10 and the second photometer 11;

furthermore, more than two photometers can be arranged, the positions or the number of the photometers can be increased, and the mud position after settlement can be judged according to the signal jump time difference of the photometers with the number more than two and the positions and the distances of the photometers.

Referring to fig. 2, the embodiment of the utility model provides a sludge sedimentation is than normal position automatic detection method adopts foretell sludge sedimentation to compare normal position automatic detection device, through this sludge sedimentation than normal position automatic detection device's controlling means 12 preset solenoid valve open and close rule and operating time, includes following step:

step 1), a control device 12 controls to close a first electromagnetic valve 7, open a second electromagnetic valve 9, control a motor 4 to open a rotary gate 2 through a connecting shaft 3, and mixed liquid is filled in a settling pipe 1 under the action of water pressure;

step 2), the control device 12 controls the motor 4 to close the rotary gate 2 through the connecting shaft 3, and standing is carried out according to preset time until sludge is settled;

step 3) the control device 12 controls to close the second electromagnetic valve 9, opens the first electromagnetic valve 7, the motor 4 opens the rotary gate 2 through the connecting shaft 3, air enters the sedimentation tube 1 from the air tube 5 (constant flow) to press out the liquid in the sedimentation tube 1 from the rotary gate 2, the first photometer 10 and the second photometer 11 measure the luminosity signal of the liquid change in the sedimentation tube 1 and send the luminosity signal to the control device 12, and the control device 12 calculates the mud level according to the luminosity signal of each photometer to obtain the mud sedimentation ratio;

and 4) when the photometric signal measured by the photometer at the bottom is an air signal, the control device 12 confirms that the interior of the sedimentation pipe 1 is emptied and the washing is finished, controls to close the first electromagnetic valve 7 and the second electromagnetic valve 9, and controls the motor 4 to close the rotary gate 2 through the connecting shaft 3, so that the primary detection is finished.

In step 3 of the method, the control device 12 calculates the sludge level according to the photometric signals of the photometers 11 to obtain the sludge settlement ratio as follows:

determining a mud-water interface and a gas-liquid interface in the settling tube 1 according to two sudden jumps of photometric signals of adjacent photometers (namely, two adjacent photometers), calculating the liquid level descending speed of mixed liquid according to the time difference and the installation height difference of the sudden jumps of the adjacent photometers (namely, the two adjacent photometers), and calculating the mud level according to the liquid level descending speed of the mixed liquid to obtain the sludge settlement ratio.

In step 2 of the method, the predetermined time for standing is as follows: greater than or equal to 30 minutes.

The embodiments of the present invention will be described in further detail below.

As shown in FIG. 1, the embodiment of the utility model provides a sludge sedimentation ratio normal position automatic checkout device, include: a sedimentation pipe 1, a rotary gate 2 which is expected to be matched with each other is arranged at the bottom end of the sedimentation pipe 1, the rotary gate is connected with a motor 4 arranged at the upper end of the sedimentation pipe 1) through a connecting shaft 3, an air pipe 5 arranged at the top end of the sedimentation pipe 1 is connected with an air branch pipe of an aeration tank of an air source 6, a first electromagnetic valve 7 is arranged between the air pipe 5 and the air source 6, an exhaust pipe 8 arranged at the top end of the sedimentation pipe 1 is communicated with the atmosphere, a first electromagnetic valve I9 is arranged at the position where the exhaust pipe 8 is communicated with the atmosphere, a first photometer 10 and a second photometer 11 are arranged at different heights on the outer side of the lower part of the sedimentation pipe 1, the light paths are in reverse parallel (in the embodiment, two photometers are taken as an example, or more than two photometers can be arranged), the motor 4, the first electromagnetic valve 7, the control device 12 is provided with a liquid crystal display 13.

Referring to fig. 2, the embodiment of the present invention further provides a method for automatically detecting a sludge settling ratio in situ, which adopts the above-mentioned device for automatically detecting a sludge settling ratio in situ, and comprises the following steps:

step 1), the control device controls the first electromagnetic valve 7 to be closed, the second electromagnetic valve 9 to be opened, and the motor 4 drives the connecting shaft 3 to open the rotary gate 2, so that mixed liquid is filled in the settling tube 1 under the action of water pressure;

step 2) the control device controls the motor 4 to drive the connecting shaft 3 to close the rotary gate 2, and the rotary gate is kept stand for a period of time, such as 30min, until sludge is settled;

step 3) the control device controls the second electromagnetic valve 9 to be closed, the first electromagnetic valve 7 to be opened, the motor 4 drives the connecting shaft 3 to open the rotary gate 2, and air enters the sedimentation pipe 1 from the air source 6 to press liquid out of the rotary gate 2; the first photometer 10 and the second photometer 11 measure photometric signals, the photometric signals are transmitted to the control device 12 and recorded, and the control device 12 calculates the sludge settlement ratio according to the photometric signal jump time difference measured by the first photometer 10 and the second photometer 11 and the position and the distance between the first photometer 10 and the second photometer 11;

in the step 3), the change of the photometric signal is as shown in fig. 3 and 4, the mud-water interface is distinguished based on two sudden jumps of the light absorption value, the control device 12 calculates the liquid level descending speed of the mixed liquid according to the time difference and the installation height difference of the sudden jumps of the photometer, and the mud level is calculated to obtain the sludge settlement ratio.

And step 4), the control device receives an air signal measured by the second photometer 11, confirms that the sedimentation pipe 1 is emptied and finishes washing, controls to close the first electromagnetic valve 7, closes the second electromagnetic valve 9, and controls the motor 4 to drive the connecting shaft 3 to close the rotary gate 2, so that the measurement is finished, and the device can be ready to enter the next measurement.

In the next measurement, the control device controls to open the first electromagnetic valve 7, the motor 4 drives the connecting shaft 3 to open the rotary gate 2, and the mixed liquid enters the settling tube under the water pressure to enter the next measurement period.

Preferably, in the above method, the valve opening and closing rule and the operation time are programmed in the control device 12, and are interactively set through the liquid crystal display 13, which may be preset in the control device 12.

The automatic detection device for the sludge settlement ratio in situ can drive the mixed liquid to feed liquid by liquid level pressure in situ, and can not damage flocs and influence the determination of settlement results because no pump or thin branch pipeline exists; the liquid pipeline only has one straight settling tube, has no complex structure, is not easy to block and can stably run for a long time; after each measurement, the interior of the settling tube is washed alternately by water and gas, so that the settling tube is convenient to clean and is not easy to scale by sludge; the equipment has no complex mechanical structure, is convenient to maintain and has low replacement cost of original parts; the control device can realize the automatic measurement of the sludge settleability in a timed and uninterrupted manner. The device has simple structure, convenient installation, easy maintenance, easy cleaning, automatic sampling and automatic analysis of the sedimentation characteristic of the activated sludge, can overcome human errors and realize long-period stable operation of equipment. The device can well solve the problems that the existing sludge settleability measuring system has a complex mechanical structure and poor operation stability; the water inlet system interferes flocs, and the determination accuracy is poor; the pipeline is easy to scale and form sludge, and the cleaning is inconvenient.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. The utility model provides a sludge sedimentation is than normal position automatic checkout device which characterized in that includes:

the device comprises a sedimentation pipe (1), a rotary gate (2), a motor (4), a connecting shaft (3), an air pipe (5), a first electromagnetic valve (7), an exhaust pipe (8), a second electromagnetic valve (9), at least two photometers and a control device (12); wherein the content of the first and second substances,

the rotary gate (2) is arranged at the bottom opening of the settling pipe (1) and can open or close the bottom opening of the settling pipe (1);

the motor (4) is arranged at the upper end of the settling pipe (1), and the motor (4) is connected with the rotary gate (2) through the connecting shaft (3) and can open or close the rotary gate (2);

the air pipe (5) is arranged at the top end of the settling pipe (1) and communicated with the interior of the settling pipe (1), the first electromagnetic valve (7) is arranged on the air pipe (5), and the air pipe (5) can be connected with an external air source (6);

the exhaust pipe (8) is arranged at the top end of the settling pipe (1) and communicated with the interior of the settling pipe (1), and the second electromagnetic valve (9) is arranged on the exhaust pipe (8);

the photometers (11) are respectively arranged at different height positions on the outer side of the lower part of the settling tube (1), and the light paths of two adjacent photometers are in reverse parallel;

the control device is respectively and electrically connected with the motor (4), the first electromagnetic valve (7), the second electromagnetic valve (9) and each photometer, can receive signals of each photometer and controls the actions of the motor (4), the first electromagnetic valve (7) and the second electromagnetic valve (9) according to set program instructions.

2. The device for automatically detecting the sludge sedimentation ratio in situ as claimed in claim 1, wherein the control device adopts a control device with a liquid crystal display screen (13).

3. The device for automatically detecting the sludge sedimentation ratio in situ as claimed in claim 1 or 2, wherein the sedimentation pipe is a long straight pipe.

4. The device for automatically detecting the sludge sedimentation ratio in situ according to claim 1 or 2, further comprising: and the air source or the vacuum pump is connected with the air pipe (5).

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