Sewage conductivity measuring device and measuring method

Abstract

The invention provides a sewage conductivity measuring device and method, and relates to the technical field of environment monitoring equipment.The sewage conductivity measuring device comprises a host and a measuring assembly, the measuring assembly comprises a first electrode and a second electrode which are electrically connected with the host, and the measuring assembly comprises a first channel for sewage to pass through; the measuring ends of the first electrode and the second electrode are located in the first channel, a cleaning assembly is arranged in the first channel, and the cleaning assembly is at least used for cleaning the measuring ends of the first electrode and the second electrode. The cleaning assembly is adopted to clean the first electrode and the second electrode of the conductivity meter, oil stains, sediments and other pollutants on the surfaces of the first electrode and the second electrode can be removed, the measurement result is more accurate, meanwhile, impurity removal operation such as filtration on sewage is not needed, the measurement data can better reflect the actual pollution condition of the sewage, and the measurement accuracy is improved. The problem that an on-line conductivity meter is easily polluted during sewage monitoring is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental monitoring equipment, and in particular relates to a sewage conductivity measuring device and a measuring method. Background Art

[0002] Sewage conductivity refers to the ability of a solution to conduct electric current. It is an important water quality indicator in sewage treatment and environmental protection. It is used to monitor and evaluate sewage treatment effects and provide a scientific basis for environmental protection.

[0003] Sampling and analyzing sewage is a relatively traditional method for monitoring sewage quality. It has problems such as long sampling intervals, poor sample representativeness, and large accidental errors. It has now been gradually replaced by online water quality analysis equipment. At present, indicators such as turbidity and pH of sewage can be measured online with relative accuracy, which has brought great convenience to water quality monitoring. However, there are still some problems in the continuous conductivity analysis of sewage, mainly manifested in that residual oil, suspended matter and other solid and liquid impurities in sewage are easily deposited and attached to the electrode surface of the conductivity meter, resulting in low measurement results. This phenomenon will gradually worsen over time.

[0004] However, if filtration or other measures are used to pre-treat the sewage that contacts the electrodes, the measurement results cannot fully match the actual pollution situation of the sewage, which reduces the reference value of the measured conductivity data.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a sewage conductivity measuring device and a measuring method to solve the electrode contamination problem when the conductivity meter is used for sewage monitoring, and to make the measurement result as close to reality as possible, so as to solve the current electrode contamination problem when online monitoring of sewage conductivity is performed.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A sewage conductivity measuring device comprises a main unit and a measuring component, wherein the measuring component comprises a first electrode and a second electrode electrically connected to the main unit, the measuring component comprises a first channel for sewage to pass through, the measuring ends of the first electrode and the second electrode are located in the first channel, a cleaning component is provided in the first channel, and the cleaning component is at least used to clean the measuring ends of the first electrode and the second electrode.

[0008] Preferably, when the cleaning component is working, the first electrode and the second electrode rotate along their respective axes.

[0009] Preferably, the cleaning component comprises a cleaning brush in contact with the first electrode and / or the second electrode, and the bristles of the cleaning brush are made of insulating material.

[0010] Preferably, when the cleaning assembly is working, the cleaning brush actively rotates, and the first electrode or the second electrode rotates with the cleaning brush.

[0011] Preferably, when the cleaning component is working, the first electrode and the second electrode actively rotate, and the cleaning brush rotates with the first electrode or the second electrode.

[0012] Preferably, the cleaning brush is arranged in parallel with the first electrode and / or the second electrode, and the cleaning assembly further comprises a driving assembly arranged in the first channel, and the driving assembly is used to actively rotate the cleaning brush.

[0013] Preferably, the first electrode and the second electrode are rotatably installed in the first channel.

[0014] Preferably, a first detection electrode and a second detection electrode are also provided in the first channel. When the first detection electrode is working, the first electrode, the first detection electrode and the host constitute a first measurement circuit; when the second detection electrode is working, the second electrode, the second detection electrode and the host constitute a second measurement circuit.

[0015] Preferably, when the resistance of the first measurement circuit or the second measurement circuit increases to a preset value, the cleaning component starts to operate.

[0016] The present invention also provides a method for measuring the electrical conductivity of sewage, comprising the following steps: S1, detect the resistance of the first measurement circuit and / or the second measurement circuit, and compare it with a preset value. If it is less than the preset value, execute step S2; if it is equal to or greater than the preset value, execute step S3; S2, start the cleaning component to clean the first electrode and the second electrode according to a predetermined program, and execute step S1 after the cleaning is completed; S3. Measure the current value of the loop formed by the first electrode and the second electrode, calculate the conductivity, and output the calculation result through the host.

[0017] Beneficial effects: (1) The present invention uses a cleaning component to clean the first electrode and the second electrode of the conductivity meter, thereby removing pollutants such as oil and sediment on the surface of the first electrode and the second electrode, reducing the interference of these pollutants on the measurement results, thereby making the measurement results more accurate. At the same time, there is no need to filter the sewage and perform other impurity removal operations, so that the measurement data can better reflect the actual pollution situation of the sewage; (2) The present invention is provided with a first measuring circuit and a second measuring circuit, which can detect the contamination of the first electrode and the second electrode, so as to detect the contamination of the first electrode and the second electrode before measurement, and clean the first electrode and the second electrode in time; (3) A flow guide component is also provided to accelerate the flow of sewage near the first electrode and the second electrode, thereby reducing the deposition rate of pollutants and playing a role in flushing the electrode surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them: Figure 1 A schematic diagram of a sewage conductivity measuring device provided in an embodiment of the present invention.

[0019] Figure 2 It is a three-dimensional schematic diagram of the first channel in some embodiments of the present invention.

[0020] Figure 3 for Figure 2 Schematic diagram of the structure within the first channel in some embodiments shown.

[0021] Figure 4 Schematic diagram of the structure of the first electrode in an embodiment of the present invention.

[0022] Figure 5 It is a three-dimensional schematic diagram of the first channel in another embodiment of the present invention.

[0023] Figure 6 for Figure 4 A schematic diagram of the structure in the first channel in another embodiment is shown.

[0024] Figure 7 Schematic diagram of the contact between the first detection electrode, the second detection electrode and the cleaning component in some embodiments of the present invention.

[0025] Figure 8 In some embodiments of the present invention In the figure: 100, main machine; 200, cleaning component; 300, first channel; 101, first electrode; 102, second electrode; 301, bearing; 302, flow guide component; 401, first detection electrode; 402, second detection electrode. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0031] The present invention will be described in detail below in conjunction with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0032] Aiming at the problem that the conductivity meter is easily attached with pollutants in the current sewage monitoring process, the present invention provides a sewage conductivity measuring device, which can not only collect sewage conductivity data online, but also clean the electrodes of the conductivity meter to solve the data error problem caused by the deposition of oil and suspended matter in the sewage on the electrode surface.

[0033] Specifically, the sewage conductivity measuring device provided by the present invention is as follows: Figure 1 , 3 As shown, it includes a host 100 and a measuring component. The host 100 is a conductivity meter host 100. The measuring component includes a first electrode 101 and a second electrode 102 electrically connected to the host 100. The conductivity is measured by applying a potential difference between the first electrode 101 and the second electrode 102 by the host 100; the measuring component also includes a first channel 300 for sewage to pass through, the measuring ends of the first electrode 101 and the second electrode 102 are located on the inner side of the first channel 300, and a cleaning component 200 is provided in the first channel 300. The cleaning component 200 is at least used to clean the measuring ends of the first electrode 101 and the second electrode 102.

[0034] The present invention mainly relies on the cleaning component 200 to mechanically wash the measuring ends of the first electrode 101 and the second electrode 102, thereby cleaning the electrodes and removing pollutants attached to the surfaces of the first electrode 101 and the second electrode 102; at the same time, the present invention does not need to perform impurity removal operations such as filtering on the sewage entering the first channel 300, so that the measurement data is closer to the actual pollution situation of the sewage.

[0035] In the present invention, Figure 1 As shown, the first electrode 101 and the second electrode 102 are generally rod-shaped electrodes, and cylindrical rod-shaped electrodes are preferably selected to facilitate cleaning by the cleaning component 200 and reduce wear of the electrodes and the cleaning component 200. In other embodiments, the first electrode 101 and the second electrode 102 can also be polygonal.

[0036] In the present invention, the cleaning assembly 200 can fully clean the peripheral surfaces of the first electrode 101 and the second electrode 102. To achieve this purpose, the first electrode 101, the second electrode 102 and the wall surface of the first channel 300 should be rotatably connected so that the first electrode 101 and the second electrode 102 can rotate around their respective axes, for example Figure 4 As shown, the first electrode 101 and the second electrode 102 adopt an upper and lower two-end structure, the upper half is connected to the conductivity meter host 100 and fixed on the first channel 300, and a bearing 301 is provided at the connection between the lower half of the first electrode 101 and the second electrode 102 and the first channel 300, so that the lower half of the first electrode 101 and the second electrode 102 can rotate with the cleaning component.

[0037] In some embodiments of the present invention, Figure 2 , 3As shown, a driving electrode is provided at the connection between the cleaning component 200 and the first channel 300. When the driving electrode is working, the cleaning brush actively rotates, and the first electrode 101 or the second electrode 102 rotates with the cleaning brush, that is, the cleaning brush actively rotates around its axis, and while cleaning the surface of the first electrode 101 and the second electrode 102, it drives the first electrode 101 and the second electrode 102 to rotate, so as to achieve cleaning of the entire circumference of the first electrode 101 and the second electrode 102.

[0038] In this case, the cleaning component 200 includes a cleaning brush in contact with the first electrode 101 and / or the second electrode 102, the bristles of the cleaning brush are made of insulating material, and also includes a driving motor connected to the cleaning brush to drive the cleaning brush to rotate around its axis.

[0039] In some embodiments, when the cleaning component 200 is working, the first electrode 101 and the second electrode 102 rotate along their respective axes, that is, the first electrode 101 and the second electrode 102 actively rotate around their axes to change the contact position between the first electrode 101 and the second electrode 102 and the cleaning component 200, and complete the overall cleaning of the first electrode 101 and the second electrode 102.

[0040] In these embodiments, the cleaning component 200 is two cleaning brushes fixed in the first channel 300, the bristles of the cleaning brushes are made of insulating material, the cleaning brushes are arranged parallel to the first electrode 101 or the second electrode 102, the working surface of the cleaning brushes is in contact with the first electrode 101 or the second electrode 102, and a driving motor is arranged at the position where the first electrode 101 and the second electrode 102 are installed in the first channel 300 to drive the first electrode 101 and the second electrode 102 to rotate.

[0041] The present invention can clean the surface of the first electrode 101 and the second electrode 102 by adopting the above solution. However, the pollution process of the first electrode 101 and the second electrode 102 is relatively slow. Since the types and water quality of sewage vary greatly in space and time, it is difficult to determine whether the first electrode 101 and the second electrode 102 need to be cleaned without personnel inspection. In order to solve this problem, in a preferred embodiment of the present invention, Figures 5 to 7 As shown, the first channel 300 is further provided with a first detection electrode 401 and a second detection electrode 402. When the first detection electrode 401 is working, the first electrode 101, the first detection electrode 401 and the host 100 constitute a first measurement circuit; when the second detection electrode 402 is working, the second electrode 102, the second detection electrode 402 and the host 100 constitute a second measurement circuit.

[0042] Furthermore, the first detection electrode 401 and the second detection electrode 402 are located outside the first electrode 101 and the second electrode 102, and the distance between the first detection electrode 401 and the first electrode 101, and the distance between the second detection electrode 402 and the second electrode 102 are less than 10 mm or less than 10% of the distance between the first electrode 101 and the second electrode 102, so as to reduce the impact of changes in sewage conductivity.

[0043] When performing contamination detection on the first electrode 101 or the second electrode 102, the host 100 applies a voltage between the first electrode 101 and the first detection electrode 401, or between the second electrode 102 and the second detection electrode 402. The voltage is a preset value, and a fixed voltage can be applied during each detection. By detecting the current values ​​of the first measurement circuit and the second measurement circuit, the contamination status of the first electrode 101 and the second electrode 102 can be judged from the magnitude of the current values. When the measured current value is lower than the preset value, it indicates that the surface contamination of the first electrode 101 and the second electrode 102 exceeds the standard, and the cleaning component 200 can be started for cleaning.

[0044] The first detection electrode 401 or the second detection electrode 402 may be disposed at a position capable of contacting the cleaning component 200, such as Figure 7 As shown, when the cleaning component 200 is working, the first detection electrode 401 or the second detection electrode 402 will be cleaned together, thereby avoiding errors caused by contaminants on the surface of the first detection electrode 401 or the second detection electrode 402 .

[0045] The pollution detection of the first electrode 101 or the second electrode 102 may be set to be measured regularly, for example, once every 24 hours or even a shorter time period, and the time interval may also be extended.

[0046] In some embodiments, a resistance value may be used instead of a current value, and when the resistance of the first measurement circuit or the second measurement circuit increases to a preset value, the cleaning component 200 is activated.

[0047] In addition, in order to reduce the deposition on the surface of the first electrode 101 and the second electrode 102, a flow guide component 302 fixedly connected to the first channel 300 is provided in the first channel 300, such as Figure 8 As shown, the first electrode 101, the second electrode 102 and the cleaning component 200 are arranged on the inner side of the guide component 302. The guide component 302 is an arc-shaped plate arranged opposite to each other, and the middle part of the arc-shaped plate protrudes toward the first electrode 101 and the second electrode 102. When the sewage flows toward the first electrode 101 and the second electrode 102 along the inside of the guide component 302, the channel area in the guide component 302 gradually narrows, thereby accelerating the flow rate of the sewage and making it less likely for pollutants to deposit.

[0048] The shape of the flow guide component 302 may be, in addition to an arc, a trapezoid, an obtuse triangle or other shapes that are narrow in the middle and wide at both ends.

[0049] When the first detection electrode 401 or the second detection electrode 402 is provided, the first detection electrode 401 and the second detection electrode 402 are also provided on the inner side of the flow guide component 302 .

[0050] The present invention also provides a method for measuring the electrical conductivity of sewage, which uses the above device to measure the electrical conductivity of sewage, specifically, comprising the following steps: S1, detect the resistance of the first measurement circuit and / or the second measurement circuit, and compare it with a preset value. If it is less than the preset value, execute step S2; if it is equal to or greater than the preset value, execute step S3; S2, start the cleaning component 200, clean the first electrode 101 and the second electrode 102 according to a predetermined procedure, and execute step S1 after the cleaning is completed; S3 , measuring the current value of the loop formed by the first electrode 101 and the second electrode 102 , calculating the conductivity, and outputting the calculation result through the host 100 .

[0051] Through the above method, the influence of pollutants attached to the electrode surface can be reduced as much as possible when measuring sewage conductivity, making the measurement result more accurate.

[0052] In summary: The present invention uses a cleaning component 200 to clean the first electrode 101 and the second electrode 102 of the conductivity meter, thereby removing pollutants such as oil and sediment on the surfaces of the first electrode 101 and the second electrode 102, reducing the interference of these pollutants on the measurement results, thereby making the measurement results more accurate. At the same time, there is no need to perform impurity removal operations such as filtering on the sewage, so that the measurement data can better reflect the actual pollution situation of the sewage, solving the current electrode contamination problem in online monitoring of sewage conductivity.

[0053] 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 sewage conductivity measuring device, comprising a host and a measuring component, wherein the measuring component comprises a first electrode and a second electrode electrically connected to the host, characterized in that: The measuring component comprises a first channel for sewage to pass through, the measuring ends of the first electrode and the second electrode are located in the first channel, a cleaning component is arranged in the first channel, and the cleaning component is at least used for cleaning the measuring ends of the first electrode and the second electrode.

2. A sewage conductivity measuring device according to claim 1, characterized in that: When the cleaning component is working, the first electrode and the second electrode rotate along their respective axes.

3. A sewage conductivity measuring device according to claim 2, characterized in that: The cleaning component comprises a cleaning brush in contact with the first electrode and / or the second electrode, and the bristles of the cleaning brush are made of insulating material.

4. A sewage conductivity measuring device according to claim 3, characterized in that: When the cleaning component is working, the cleaning brush actively rotates, and the first electrode or the second electrode rotates with the cleaning brush.

5. A sewage conductivity measuring device according to claim 3, characterized in that: When the cleaning component is working, the first electrode and the second electrode actively rotate, and the cleaning brush rotates with the first electrode or the second electrode.

6. A sewage conductivity measuring device according to claim 4, characterized in that: The cleaning brush is arranged in parallel with the first electrode and / or the second electrode. The cleaning assembly further comprises a driving assembly arranged in the first channel, and the driving assembly is used to actively rotate the cleaning brush.

7. A sewage conductivity measuring device according to claim 6, characterized in that: The first electrode and the second electrode are rotatably installed in the first channel.

8. A sewage conductivity measuring device according to any one of claims 1 to 7, characterized in that: The first channel is also provided with a first detection electrode and a second detection electrode. When the first detection electrode is working, the first electrode, the first detection electrode and the host constitute a first measurement circuit; when the second detection electrode is working, the second electrode, the second detection electrode and the host constitute a second measurement circuit.

9. A sewage conductivity measuring device according to claim 8, characterized in that: When the resistance of the first measuring circuit or the second measuring circuit increases to a preset value, the cleaning component starts to work.

10. A method for measuring the electrical conductivity of sewage, characterized in that: The steps include: S1, detect the resistance of the first measurement circuit and / or the second measurement circuit, and compare it with a preset value. If it is less than the preset value, execute step S2; if it is equal to or greater than the preset value, execute step S3; S2, start the cleaning component to clean the first electrode and the second electrode according to a predetermined program, and execute step S1 after the cleaning is completed; S3. Measure the current value of the loop formed by the first electrode and the second electrode, calculate the conductivity, and output the calculation result through the host.

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