JPH1194789A - Apparatus for preventing adhesion of impurities in measuring sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the adhesion of impurities such as a yarn like substance such as hair or the like, a biological membrane or the like, by attaching a float to a measuring sensor and further attaching the upper part of the measuring sensor to a fixed support member in a shakable manner to shake the detection part of the measuring sensor within water. SOLUTION: The upper part of a measuring sensor 3 having a detection part 31 formed to the lower end thereof so as to be immersed in water at required depth and having a spherical float 32 attached thereto in a piercing state is attached to a fixed support member 33 through a hinge 34 in a shakable manner. The detection part 31 of the measuring sensor 3 is immersed in water at the required depth to detect various measured values within an oxidation ditch, and can be shaken so as to be matched with the shaking of the float 32 by a water flow. Even if impurities such as a yarn like substance such as hair or the like, a biological membrane or the like adhere to the detection part 31 of the measuring sensor 3, they are naturally peeled from the detection part 31 by the water flow formed by the shaking operation of the measuring sensor 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement system for controlling and monitoring an organic wastewater such as sewage by installing it in a facility for biologically treating the wastewater with activated sludge (hereinafter referred to as "oxidation ditch"). Regarding the sensor, in particular, impurities in the measurement sensor for preventing impurities such as hair and other fibrous substances and biofilms from adhering to the detection unit of the measurement sensor used by immersing the detection unit at a required depth in water. The present invention relates to a device for preventing adhesion of slime.

[0002]

2. Description of the Related Art In an oxidation ditch, zone operation or intermittent aeration is used to perform nitrification denitrification. In order to automate these operations, in recent years, while measuring the dissolved oxygen value (hereinafter, referred to as “DO value”) in sewage with a sensor (hereinafter, referred to as “DO value sensor”), the DO value is set to a predetermined value. There has been proposed an automatic operation control method for controlling the number of rotations of the aeration device so as to maintain the value or for intermittently operating the aeration device.

[0003]

In this automatic driving control method, when a DO value sensor for measuring a DO value by immersing the detection unit at a required depth in water is used, the position of the required depth in water away from the water surface is determined. Since the DO value is detected, there is an advantage that an average DO value in the oxidation ditch can be detected. However, since the oxidation ditch generally does not have a sedimentation basin at first, the wastewater flowing into the oxidation ditch contains a large amount of thread-like substances such as hair, and the flow in the oxidation ditch is slow. For this reason, there is a problem that a thread-like substance such as hair is easily entangled with the DO value sensor, and an accurate DO value cannot be measured. In addition, although the float type DO value measurement sensor developed in recent years has little entanglement of filamentous substances such as hair, the detection unit of the sensor is located near the water surface, so impurities such as scum and biofilm floating on the water surface can be removed. When the sludge concentration decreases or the agitation force of the aerator decreases, the accurate DO value in the oxidation ditch cannot be detected. There was a problem that automatic operation control could not be performed. In addition, in addition to the DO value sensor, in recent years, various measurement sensors such as a sensor that measures an oxidation-reduction potential value (hereinafter, referred to as “ORP value”) (hereinafter, referred to as “ORP value sensor”) are controlled. However, the same problem occurs in the case of these measurement sensors.

The present invention has been made in view of the above-mentioned problems of the conventional measuring sensor, and has a detecting section of a measuring sensor which is used by immersing a detecting section at a required depth in water. It is an object of the present invention to provide an impurity adhesion preventing device in a measurement sensor capable of preventing the adhesion of impurities.

[0005]

In order to solve the above-mentioned object, an apparatus for preventing adhesion of impurities in a measuring sensor according to the first invention is installed in an oxidation ditch, and a detecting unit is immersed in a required depth in water. In addition, a float is attached to a measurement sensor for controlling and monitoring, and an upper portion of the measurement sensor is attached to a fixed support member so as to be able to swing, so that a detection unit of the measurement sensor swings in water. It is characterized by the following. Here, the “measurement sensor” means all measurement sensors that are installed in an oxidation ditch such as a DO meter sensor and an ORP meter sensor to perform control and monitoring.

The device for preventing the adhesion of impurities in the measurement sensor can detect various average measurement values in the oxidation ditch by immersing the detection section of the measurement sensor at a required depth in water. By attaching a float to the sensor for measurement, and by attaching the upper part of the sensor for measurement to the fixed support member so as to be swingable, the detection part of the sensor for measurement can be swung underwater, and the detection of the sensor for measurement can be performed. Even if impurities such as a hair-like substance such as hair or a biofilm adhere to the portion, the impurities spontaneously separate from the detection portion due to the water flow generated by the swinging operation of the measurement sensor.

In order to achieve the same object, an apparatus for preventing the adhesion of impurities in the measuring sensor according to the second aspect of the present invention is installed in an oxidation ditch, and the detection unit is immersed in a required depth in water for control and monitoring. The detection unit of the measurement sensor is rotated or moved up and down in water by attaching the upper part of the measurement sensor for performing the measurement to a drive mechanism for periodically rotating or moving up and down. Here, the “measurement sensor” means all measurement sensors that are installed in an oxidation ditch such as a DO meter sensor and an ORP meter sensor to perform control and monitoring.

The device for preventing impurities from adhering to the measuring sensor can detect various average measured values in the oxidation ditch by immersing the detecting portion of the measuring sensor at a required depth in water. By attaching the upper part of the measurement sensor to a drive mechanism that periodically rotates or moves up and down, the detection unit of the measurement sensor can be rotated or moved up and down in water, and the detection unit of the measurement sensor Even if impurities such as a thread-like substance and a biofilm adhere, the impurities spontaneously peel off from the detection unit due to the water flow generated by the rotation or vertical movement of the measurement sensor.

In order to achieve the same object, the apparatus for preventing adhesion of impurities in the measuring sensor according to the third aspect of the present invention is installed in an oxidation ditch, and the detection unit is immersed in a required depth in water for control and monitoring. The periphery of the detection unit of the measurement sensor for performing the measurement is supported by a spherical support, and the upper part of the detection unit is covered by an outer cylinder having substantially the same diameter as the spherical support. Here, "measurement sensor"
Means all measurement sensors installed in an oxidation ditch such as a DO meter sensor and an ORP meter sensor for controlling and monitoring.

The apparatus for preventing the adhesion of impurities in the measuring sensor can detect various average measured values in the oxidation ditch by immersing the detecting section of the measuring sensor at a required depth in water. By supporting the periphery of the detection unit of the measurement sensor with a spherical support and covering the upper part of the detection unit with an outer cylinder having substantially the same diameter as the spherical support, the detection unit of the measurement sensor has a thread-like shape such as hair. Impurities, such as substances and biofilms, are less likely to adhere, and the impurities spontaneously separate from the detector due to the water flow created by the spherical support that supports the periphery of the detector of the measurement sensor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus for preventing the adhesion of impurities in a measuring sensor according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an oxidation ditch 1 to which a device for preventing adhesion of impurities in a measurement sensor according to the present invention is applied. The oxidation ditch includes an oval shape as shown in FIG. , A circular or the like can be used. The oxidation ditch 1 is provided with one or more screw-type aeration devices 2 and a measurement sensor 3 for controlling and monitoring. As the measurement sensor 3, a DO value sensor, an ORP value sensor, or the like is used.
Various measurement values detected by the measurement sensor 3 are taken into the control panel 4 and configured to be used for controlling and monitoring the operation of the aeration apparatus 2.

FIG. 2 shows a first embodiment of the apparatus for preventing adhesion of impurities in the measuring sensor according to the present invention. The device for preventing the adhesion of impurities has a sensor detecting portion 31 formed at a lower end so as to be immersed at a required depth in water, and fixedly supports an upper portion of a measuring sensor 3 attached so as to penetrate a spherical float 32. There is a member 33 that is swingably attached to a member 33 via a hinge 34.

Thus, the detecting unit 31 of the measuring sensor 3
Is immersed at a required depth in the water to detect various average measurement values in the oxidation ditch 1 and to adjust the detection unit 31 of the measurement sensor 3 in accordance with the swing of the float 32 due to the water flow. It can be swung in water, and even if impurities such as hair or a biofilm adhere to the detection unit 31 of the measurement sensor 3, the water flow generated by the swing operation of the measurement sensor 3 causes the detection unit to oscillate. The impurities will be spontaneously exfoliated from 31.

FIG. 3 shows a second embodiment of the apparatus for preventing the adhesion of impurities in the measuring sensor according to the present invention. This impurity adhesion preventing device is a driving mechanism (not shown) for periodically rotating or vertically moving the upper portion of the measuring sensor 3 having the sensor detecting portion 31 formed at the lower end so as to be immersed in a required depth in water.
Some are to be attached to. In this case,
As the drive mechanism, a rotary drive mechanism such as a motor, a vertical drive mechanism combining a rotary drive mechanism and a crank mechanism, and the like,
Any drive mechanism can be used.

Thus, the detecting unit 31 of the measuring sensor 3
Can be immersed in a required depth in the water to detect various average measurement values in the oxidation ditch 1, and the driving mechanism can detect the detection unit 3 of the measurement sensor 3.
1 can be rotated or moved up and down in water, and even if impurities such as hair or a biofilm adhere to the detection section 31 of the sensor 3 for measurement, the rotation or up / down movement of the sensor 3 for measurement can be performed. Impurities are spontaneously exfoliated from the detection unit 31 by the generated water flow.

FIG. 4 shows a third embodiment of the apparatus for preventing the adhesion of impurities in a measuring sensor according to the present invention. The device for preventing the adhesion of impurities supports the periphery of the detection unit 31 of the measurement sensor 3 having the sensor detection unit 31 formed at the lower end with a spherical support 36 so as to be immersed in a required depth in water. Is covered with an outer cylinder 35 having substantially the same diameter as the spherical support 36. In this case, the diameters of the outer cylinder 35 and the spherical support 36 are set so that impurities such as a thread-like substance such as hair and biofilm are hardly attached.
The length is set to 50 mm or more, preferably 100 mm or more, and the connection between the outer cylinder 35 and the spherical support 36 is formed smoothly.

Thus, the detecting unit 31 of the measuring sensor 3
Can be immersed in a required depth in water to detect various average measurement values in the oxidation ditch 1, and the outer cylinder 35 and the spherical support 36 allow the hair to reach the detection unit 31 of the measurement sensor 3. Of impurities such as thread-like substances and biofilms, etc.
The impurities spontaneously separate from the detection unit 31 due to the water flow created by the spherical support 36 that supports the periphery of the detection unit 31.

The measuring sensor targeted by the apparatus for preventing adhesion of impurities in the measuring sensor of the present invention is installed in an oxidation ditch such as a DO meter sensor or an ORP meter sensor to perform all control and monitoring operations. A sensor is included, and the configuration and the like of each of the above embodiments can be selectively used as needed.

[0020]

According to the apparatus for preventing the adhesion of impurities in the measurement sensor according to the first aspect, the detection section of the measurement sensor is immersed at a required depth in water, so that various average measurements in the oxidation ditch are performed. It is possible to detect the value, attach the float to the sensor for measurement, and swing the upper part of the sensor for measurement to the fixed support member so that the detection part of the sensor for measurement can be swung in water. Even if impurities such as hair or a biofilm adhere to the detection section of the measurement sensor, the water flow created by the oscillating operation of the measurement sensor allows the impurities to be spontaneously separated from the detection section. Thus, it is possible to detect various measured values accurately over a long period of time, and to reduce maintenance work of the measurement sensor.

According to the second aspect of the present invention, the detection section of the measurement sensor is immersed in a required depth in water, so that various average measurements in the oxidation ditch can be made. Value can be detected, and by attaching the upper part of the measurement sensor to a drive mechanism that periodically rotates or moves up and down, the detection part of the measurement sensor can be rotated or moved up and down in water, Even if impurities such as hair or a biofilm adhere to the detection section of the sensor, the impurities can be spontaneously separated from the detection section by the water flow generated by the rotation or vertical movement of the measurement sensor. Accordingly, accurate various measurement values can be detected over a long period of time, and maintenance work of the measurement sensor can be reduced.

According to the third aspect of the present invention, the detection unit of the measurement sensor is immersed at a required depth in water, thereby averaging various measurements in the oxidation ditch. The value can be detected, the periphery of the detection unit of the measurement sensor is supported by a spherical support, and the upper part of the detection unit is covered with an outer cylinder having substantially the same or the same diameter as the spherical support. Threads such as hair and impurities such as biofilms are unlikely to adhere to the detection section of the measurement sensor, and impurities are naturally generated from the detection section by the water flow created by the spherical support that supports the circumference of the detection section of the measurement sensor. , Which enables accurate measurement values to be detected over a long period of time and reduces maintenance work on the measurement sensor. be able to.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an oxidation ditch to which an apparatus for preventing adhesion of impurities in a measurement sensor of the present invention is applied.

FIG. 2 is an explanatory view showing a first embodiment of a device for preventing adhesion of impurities in a measurement sensor according to the present invention.

FIG. 3 is an explanatory view showing a second embodiment of a device for preventing adhesion of impurities in a measurement sensor according to the present invention.

FIG. 4 is an explanatory view showing a third embodiment of an apparatus for preventing adhesion of impurities in a measurement sensor according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oxidation ditch 2 Aeration device 3 Measurement sensor 31 Detector 32 Float 33 Fixed support member 34 Hinge 35 Outer cylinder 36 Spherical support 4 Control device

Claims (3)

[Claims] 1. Installed in an oxidation ditch,
The detection unit is immersed in the required depth in the water, and a float is attached to the measurement sensor that performs control and monitoring, and the upper part of the measurement sensor is swingably attached to a fixed support member, so that the detection unit of the measurement sensor is A device for preventing impurities from adhering in a measurement sensor, wherein the device is swung in water. 2. Installed in an oxidation ditch,
By immersing the detector at the required depth in water and attaching it to a drive mechanism that periodically rotates or moves the upper part of the measurement sensor for control and monitoring, the detector of the measurement sensor rotates or moves up and down in water. An apparatus for preventing adhesion of impurities in a measurement sensor, characterized in that: 3. Installed in an oxidation ditch,
The detection unit is immersed in a required depth in water, and the periphery of the detection unit of the measurement sensor that performs control and monitoring is supported by a spherical support, and the upper part of the detection unit is an outer cylinder having substantially the same diameter as the spherical support. An apparatus for preventing adhesion of impurities in a measurement sensor, which is covered.