CN115639125A - Sludge concentration detection system and method - Google Patents
Sludge concentration detection system and method Download PDFInfo
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- CN115639125A CN115639125A CN202211670203.2A CN202211670203A CN115639125A CN 115639125 A CN115639125 A CN 115639125A CN 202211670203 A CN202211670203 A CN 202211670203A CN 115639125 A CN115639125 A CN 115639125A
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Abstract
The invention provides a sludge concentration detection system and a method, belonging to the technical field of sludge concentration detection, wherein the sludge concentration detection method is realized by a sludge concentration detection system, and the system comprises: a stirring device; the first delivery pump and the second delivery pump are respectively arranged on two opposite sides of the top of the tank body; one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body; one end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body; the first sludge concentration sensor group is arranged on the first return pipe; the second sludge concentration sensor group is arranged on the second return pipe; and the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group. Through treater comparison detection data, when detection data unanimous, get the mean value of detection data and regard as mud concentration testing result, think that the inside mud concentration of cell body is in under the even condition, guaranteed the reliability and the degree of accuracy of testing result promptly.
Description
Technical Field
The invention relates to the technical field of sludge concentration detection, in particular to a sludge concentration detection system and method.
Background
At present, when the sludge concentration in a sewage tank body is detected, a sludge concentration sensor or a sludge concentration detector and other detection devices are usually adopted for detection, and in the detection process, sludge and sewage are precipitated and layered due to gravity and density, so that the sludge concentration in each position in the tank body is uneven, and the detection result is influenced; therefore, the invention aims to provide a scheme for detecting the sludge concentration under the condition that the sludge concentration in the tank body is uniform.
Disclosure of Invention
The invention provides a sludge concentration detection system and method, which are used for detecting the sludge concentration under the condition of uniform sludge concentration in a tank body, so that the reliability and accuracy of a detection result are ensured.
An aspect of an embodiment of this specification discloses a sludge concentration detection system, includes:
the stirring device is used for stirring the sewage in the tank body;
the first delivery pump and the second delivery pump are respectively arranged on two opposite sides of the top of the tank body and are respectively communicated with the inside of the tank body on the side where the first delivery pump and the second delivery pump are respectively arranged through pipelines;
one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body;
one end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body;
the first sludge concentration sensor group is arranged on the first return pipe so as to detect the sludge concentration of the sewage in the first return pipe;
the second sludge concentration sensor group is arranged on the second return pipe and is used for detecting the sludge concentration of the sewage in the second return pipe;
and the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group so as to receive the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group, compare the detection data and take the mean value of the detection data as a sludge concentration detection result if the detection data are consistent with the detection data.
In an embodiment disclosed in this specification, a third delivery pump is disposed at the top of the tank body, the third delivery pump is located between the first delivery pump and the second delivery pump, an input end of the third delivery pump is communicated with the inside of the tank body below the third delivery pump through a pipeline, an output end of the third delivery pump is communicated with the first return pipe and the second return pipe through pipelines, and two communication points are located between the first delivery pump and the first sludge concentration sensor group and between the second delivery pump and the second sludge concentration sensor group.
In one embodiment disclosed in the present specification, the stirring device includes:
the first stirring mechanism is arranged between the first conveying pump and the third conveying pump;
and the second stirring mechanism is arranged between the second conveying pump and the third conveying pump.
In an embodiment disclosed in the present specification, a third sludge concentration sensor group is disposed on a side surface of the tank body, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group are respectively disposed on two opposite sides of the tank body to detect the sludge concentration of the sewage between the two sides.
In one embodiment disclosed in the present specification, the first sludge concentration sensor group and/or the second sludge concentration sensor group and/or the third sludge concentration sensor group comprises at least one photoelectric sludge concentration sensor and at least one ultrasonic sludge concentration sensor.
Another aspect of the embodiments of the present specification discloses a method for detecting sludge concentration, which uses any one of the above-mentioned sludge concentration detection systems to detect sludge concentration;
the sludge concentration detection method comprises the following steps:
s1, stirring the sewage in the pool body through a stirring device;
s2, respectively pumping out the sewage on two opposite sides in the tank body through a first delivery pump, a second delivery pump, a first return pipe, a second return pipe, a first sludge concentration sensor group and a second sludge concentration sensor group, and carrying out sludge concentration detection to obtain the sludge concentration of the sewage on two opposite sides in the tank body;
s3, comparing the sludge concentrations of the sewage at two opposite sides in the tank body through a processor, and taking the mean value of the sludge concentrations as the sludge concentration if the sludge concentrations of the sewage at the two sides are consistent; otherwise, repeatedly executing S1-S2 until the sludge concentration of the sewage at the two sides is consistent, and taking the average value of the sludge concentration and the sludge concentration as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and executing the steps S1-S3 again after the sewage in the pool body is restored to a relatively static state before stirring, wherein the sludge concentration obtained in the step S3 is taken as a second sludge concentration;
s5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration and the second sludge concentration are consistent; otherwise, repeating S1-S4 until the first sludge concentration is consistent with the second sludge concentration, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
In an embodiment disclosed in this specification, the method for detecting sludge concentration further includes the steps of:
s6, respectively arranging third sludge concentration sensor groups at different heights of the tank body so as to directly detect the sludge concentrations of the sewage with different heights in the tank body;
s7, comparing the sludge concentrations of the sewage with different heights through a processor, and if the sludge concentrations of the sewage with different heights are consistent, taking the mean value of the first sludge concentration and the second sludge concentration obtained in the step S5 as a sludge concentration detection result; otherwise, repeatedly executing S1-S6 until the sludge concentration of the sewage with different heights is consistent.
In an embodiment disclosed in this specification, in S7, if the sludge concentrations of the different-height sewage are consistent, taking a mean value of the sludge concentrations of the different-height sewage, and comparing the mean value with the first sludge concentration and the second sludge concentration obtained in S5, and if the mean value of the sludge concentrations of the different-height sewage is consistent with the mean value of the first sludge concentration and the second sludge concentration, taking the mean value as a sludge concentration detection result; otherwise, repeating S1-S6 until the mean value of the sludge concentrations of the sewage with different heights is consistent with the mean value of the first sludge concentration and the second sludge concentration.
In an embodiment disclosed in this specification, in S2, sewage at a middle position between the two opposite sides in the tank body is pumped out and is mixed with sewage at the two opposite sides in the tank body, and then sludge concentration detection is performed.
The embodiment of the specification can at least realize the following beneficial effects:
1. the sludge concentration of sewage on two opposite sides in the tank body is respectively detected through the stirring device, the first delivery pump, the second delivery pump, the first return pipe, the second return pipe, the first sludge concentration sensor group and the second sludge concentration sensor group, the detection data are compared by the processor, and when the detection data are consistent, the average value of the detection data is taken as the sludge concentration detection result; at the moment, the sludge concentration in the tank body is considered to be in the uniform condition, so that the reliability and accuracy of the detection result are ensured.
2. The sewage on two opposite sides in the tank body is respectively pumped out, the sludge concentration is detected, the sludge concentrations of the sewage on two opposite sides in the tank body are obtained and compared, and if the sludge concentrations are consistent, the average value of the sludge concentrations is taken as the sludge concentration; then, after the sewage in the tank body is restored to a relative static state before stirring, executing S1-S3 again; thus obtaining the first sludge concentration and the second sludge concentration, comparing the first sludge concentration and the second sludge concentration, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the sludge concentrations are consistent; otherwise, repeating the step S1 to the step S4 until the sludge concentration is consistent. At this moment, then think that the inside sludge concentration of cell body is in under the even condition, guaranteed the reliability and the degree of accuracy of testing result promptly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block schematic diagram of a sludge concentration detection system in accordance with some embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a sludge concentration detection system according to some embodiments of the present invention.
FIG. 3 is a schematic diagram of steps of a sludge concentration detection method according to some embodiments of the present invention.
Fig. 4 is a schematic side view of a third sludge concentration sensor group according to some embodiments of the present invention.
Fig. 5 is a schematic distribution diagram of a third sludge concentration sensor group according to some embodiments of the present invention.
FIG. 6 is a schematic illustration of a misalignment of mixing blades according to some embodiments of the invention.
Fig. 7 is a schematic top view of a plurality of stirring vanes in a spiral configuration according to some embodiments of the present invention.
Fig. 8 is a schematic diagram of microcontroller U1 and display screen LCD1 in the circuit of the ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 9 is a schematic diagram of a transmitting transducer J1 in the circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 10 is a schematic diagram of a voltage stabilization chip U3 in a circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 11 is a schematic diagram of a receiving transducer J2 and a logarithmic amplifier U6 in the circuitry of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Figure 12 is a schematic diagram of an electrical circuit of a photoelectric sludge concentration sensor according to some embodiments of the present invention.
Reference numerals are as follows:
1. a stirring device; 11. a first stirring mechanism; 12. a second stirring mechanism;
2. a first delivery pump; 21. a first return pipe;
3. a second delivery pump; 31. a second return pipe;
4. a third delivery pump;
5. a first sludge concentration sensor group;
6. a second sludge concentration sensor group;
7. a third sludge concentration sensor group;
8. a tank body;
100. a motor; 200. a stirring rod; 300. stirring blades; 400. a photoelectric sludge concentration sensor; 500. ultrasonic wave mud concentration sensor.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in accordance with the orientations or positional relationships illustrated in the drawings, or are orientations or positional relationships as are conventionally understood by those skilled in the art, and are used merely for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and are not to be construed as limiting the invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Furthermore, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, an aspect of an embodiment of the present specification discloses a sludge concentration detection system, including:
the stirring device 1 is used for stirring the sewage in the tank body 8;
the first delivery pump 2 and the second delivery pump 3 are respectively arranged on two opposite sides of the top of the tank body 8 and are respectively communicated with the interior of the tank body 8 on one side where the first delivery pump and the second delivery pump are respectively arranged through pipelines;
one end of the first return pipe 21 is connected with the first delivery pump 2, and the other end is communicated with the interior of the tank body 8;
one end of the second return pipe 31 is connected with the second delivery pump 3, and the other end is communicated with the interior of the tank body 8;
the first sludge concentration sensor group 5 is arranged on the first return pipe 21 and is used for detecting the sludge concentration of the sewage in the first return pipe 21;
a second sludge concentration sensor group 6 arranged on the second return pipe 31 to detect the sludge concentration of the sewage in the second return pipe 31;
and the processor is respectively connected with the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 to receive the detection data of the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6, compare the detection data and take the mean value of the detection data as a sludge concentration detection result if the detection data are consistent with the detection data.
It should be understood that the processor, the stirring device 1, the first transfer pump 2, the second transfer pump 3, the first return pipe 21, the second return pipe 31, the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 may all use the existing solution or use the solution in the following embodiments.
The working process of the sludge concentration detection system is as follows:
the processor is connected with the stirring device 1, the first delivery pump 2, the second delivery pump 3, the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 so as to control the operation of the stirring device, the first delivery pump and the second delivery pump.
Stirring the sewage in the tank body 8 by using the stirring device 1, starting the first delivery pump 2 and the second delivery pump 3 in the stirring process, pumping the sewage (such as the sewage right below the first delivery pump 2 shown in fig. 2) in the tank body 8 on one side of the first delivery pump 2 by using the first delivery pump 2 to discharge to the first return pipe 21, and returning the sewage to the inside of the tank body 8 through the first return pipe 21, wherein the first sludge concentration sensor group 5 detects the sludge concentration of the sewage in the first return pipe 21 to obtain first detection data; the second delivery pump 3 pumps sewage (as shown in fig. 2, sewage right below the second delivery pump 3) in the tank body 8 at one side of the second delivery pump to discharge to the second return pipe 31, and the sewage returns to the inside of the tank body 8 through the second return pipe 31, wherein the second sludge concentration sensor group 6 detects the sludge concentration of the sewage in the second return pipe 31 to obtain second detection data; the processor receives and compares the first detection data and the second detection data, if the first detection data and the second detection data are consistent, the mean value of the detection data is taken as the sludge concentration in the tank body 8, and the sludge concentration detected at the moment is considered to be detected under the condition that the sludge concentration in the tank body 8 is uniform, so that the reliability and the accuracy of the detection result are ensured; otherwise, the detection is carried out again.
It can be understood that in practical application, a systematic error is allowed, that is, "consistent" means that the difference value of the two compared is within an allowable error range, and the two compared are regarded as consistent; and because different sludge concentration detection instruments have different detection accuracies and different process requirements of different tank bodies 8, the allowable error range does not have a uniquely determined range, i.e. the allowable error range can be set by self according to the actual situation, if the difference between the two is less than or equal to 50mg/L, the difference between the two can be considered to be in the allowable error range, i.e. the two are considered to be consistent during comparison and judgment.
In some embodiments, a third delivery pump 4 is disposed at the top of the tank body 8, the third delivery pump 4 is located between the first delivery pump 2 and the second delivery pump 3, an input end of the third delivery pump 4 is communicated with the inside of the tank body 8 below the third delivery pump through a pipeline, an output end of the third delivery pump 4 is communicated with the first return pipe 21 and the second return pipe 31 through pipelines, and two communication points are located between the first delivery pump 2 and the first sludge concentration sensor group 5 and between the second delivery pump 3 and the second sludge concentration sensor group 6 respectively.
In this embodiment, the third delivery pump 4 is located at a middle position between the first delivery pump 2 and the second delivery pump 3, and sewage (such as sewage right below as shown in fig. 2) inside the tank body 8 below the third delivery pump 4 is respectively introduced into the first return pipe 21 and the second return pipe 31 by the third delivery pump 4, so that the sewage on one side inside the tank body 8 is mixed with the sewage in the middle, and then sludge concentration detection is performed to obtain first detection data; mixing the sewage on the other side in the tank body 8 with the sewage in the middle, and then carrying out sludge concentration detection to obtain second detection data; after comparison, the obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, the stirring device 1 comprises:
the first stirring mechanism 11 is arranged between the first conveying pump 2 and the third conveying pump 4;
and a second stirring mechanism 12 provided between the second feed pump 3 and the third feed pump 4.
In this embodiment, the first stirring mechanism 11 and the second stirring mechanism 12 are arranged to stir the sewage in the tank body 8 more uniformly, that is, the first stirring mechanism 11 and the second stirring mechanism 12 can act synchronously, and can rotate in the same direction or in opposite directions during the synchronous action; that is, the sludge concentration of the sewage pumped by the first transfer pump 2, the second transfer pump 3, and the third transfer pump 4 can be made uniform as much as possible. The comparison result and the detection result obtained by the method are more reliable and accurate.
In some embodiments, each of the first stirring mechanism 11 and the second stirring mechanism 12 includes a motor 100, a stirring rod 200, and a plurality of stirring vanes 300, the motor 100 is disposed on the top of the tank body 8, the stirring rod 200 is vertically disposed inside the tank body 8 in a rotatable manner and is connected to the motor 100, the plurality of stirring vanes 300 are disposed on two opposite sides of the stirring rod 200 in a symmetrical manner or in a staggered manner (as shown in fig. 6), or the plurality of stirring vanes 300 are disposed in a spiral manner and in an inclined manner (as shown in fig. 7) along a circumferential surface of the stirring rod 200, and the downward spiral structure functions like a propeller, so that when the stirring rod 200 is driven by the motor 100 to drive the stirring vanes 300 to rotate, the stirring vanes 300 can generate a downward thrust on the sewage to push the sewage to impact the sludge at the bottom inside the tank body 8 downward, so that the sludge can be sufficiently mixed with the sewage, i.e., uniform stirring is ensured. The comparison result and the detection result obtained by the method are more reliable and accurate.
In some embodiments, as shown in fig. 4 and 5, a third sludge concentration sensor group 7 is disposed on a side surface of the tank body 8, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group 7 are respectively disposed on two opposite sides of the tank body 8 to detect the sludge concentration of the sewage between the two sides.
In this embodiment, the third sludge concentration sensor group 7 directly detects the sludge concentration of the sewage between the two opposite sides of the tank 8, the sludge concentration is compared with the first detection data and the second detection data, and if the sludge concentration is consistent with the first detection data and the second detection data, the average value of the three is used as the sludge concentration (i.e. the detection result) in the tank 8; otherwise, the three parts are detected again. The comparison result and the detection result obtained by the method are more reliable and accurate.
In some embodiments, as shown in fig. 4 and 5, the third sludge concentration sensor group 7 has a plurality of groups and is respectively distributed at different heights of the tank body 8 for detecting the sludge concentrations of the sewage at different heights of the tank body 8.
In this embodiment, as shown in fig. 4 and 5, the third sludge concentration sensor groups 7 are distributed at different heights and at different horizontal positions at the same height, that is, may be distributed in a rectangular array.
There are at least two applications, the first application: comparing the sludge concentrations of the sewage with different heights, and if the sludge concentrations of the sewage with different heights are consistent, considering that the sewage in the tank body 8 is uniformly stirred, namely, taking the average value of the first detection data and the second detection data as the sludge concentration (namely, a detection result) in the tank body 8; otherwise, the first detection data, the second detection data and the sludge concentration of the sewage with different heights are detected again. The comparison result and the detection result obtained by the method are more reliable and accurate.
The second application is as follows: comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, taking the mean value of the sludge concentrations of the sewage with different heights, comparing the mean value with the mean value of the first detection data and the second detection data, and if the sludge concentrations are consistent, taking the mean value of the sludge concentrations as the sludge concentration (namely, a detection result) in the tank body 8; otherwise, all retests are performed. The comparison result and the detection result obtained by the method are more reliable and accurate.
In some embodiments, the first sludge concentration sensor group 5 and/or the second sludge concentration sensor group 6 and/or the third sludge concentration sensor group 7 comprise at least one photoelectric sludge concentration sensor 400 and at least one ultrasonic sludge concentration sensor 500.
In this embodiment, "at least one" means that there are one or more (one or more); namely, the first return pipe 21 and/or the second return pipe 31 are/is provided with one or more photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500, and the side surface of the tank body 8 is/are provided with one or more photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500.
When the first return pipe 21 and/or the second return pipe 31 are/is provided with a photoelectric sludge concentration sensor 400 and an ultrasonic sludge concentration sensor 500, comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, and if the detection data are consistent, taking the average value of the two as first detection data or second detection data; otherwise, the detection is carried out again.
When the first return pipe 21 and/or the second return pipe 31 are/is provided with a plurality of photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500, comparing the detection data of the photoelectric sludge concentration sensors 400, and if the detection data are consistent, taking the average value as a first average value; otherwise, the detection is carried out again. Comparing the detection data of the ultrasonic sludge concentration sensors 500, and if the detection data are consistent, taking the average value as a second average value; otherwise, the detection is carried out again. Comparing the first average value with the second average value, and if the first average value and the second average value are consistent, taking the average value of the first average value and the second average value as first detection data or second detection data; otherwise, the detection is carried out again.
When the side surface of the tank body 8 is provided with a photoelectric sludge concentration sensor 400 and an ultrasonic sludge concentration sensor 500, two situations exist; in the first case: comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, and if the detection data are consistent, determining that the sewage in the tank body 8 is uniformly stirred, namely, taking the average value of the first detection data and the second detection data as the sludge concentration (namely, the detection result) in the tank body 8; otherwise, the detection is carried out again.
In the second case: comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the mean value of the photoelectric sludge concentration sensor and the detection data, comparing the mean value of the photoelectric sludge concentration sensor and the detection data with the mean value of the first detection data and the second detection data, and if the detection data are consistent, taking the mean value of the photoelectric sludge concentration sensor and the detection data as the sludge concentration (namely, the detection result) in the tank body 8; otherwise, re-detection is performed.
When the side surface of the tank body 8 is provided with a plurality of photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500, two situations exist; in the first case: according to different heights, comparing the detection data of the photoelectric sludge concentration sensor 400 belonging to the same third sludge concentration sensor group 7 (namely, the same height) with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the mean value of the detection data at the same height to obtain the mean values of the detection data at different heights, and comparing the mean values, if the detection data are consistent, considering that the sewage in the tank body 8 is uniformly stirred, namely, taking the mean value of the first detection data and the mean value of the second detection data as the sludge concentration (namely, the detection result) in the tank body 8; otherwise, re-detection is performed.
In the second case: according to different heights, comparing the detection data of the photoelectric sludge concentration sensor 400 belonging to the same third sludge concentration sensor group 7 (namely, the same height) with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the mean value of the detection data at the same height to obtain the mean values of the detection data at different heights, comparing, if the detection data are consistent, taking the mean value of all the detection data, comparing with the mean values of the first detection data and the second detection data, and if the detection data are consistent, taking the mean value of the two as the sludge concentration (namely, the detection result) in the tank body 8; otherwise, re-detection is performed.
In some embodiments, as shown in figures 8, 9, 10 and 11, the circuit of the ultrasonic sludge concentration sensor 500 comprises a microcontroller U1, a display screen LCD1, a crystal oscillator X1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor 13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a the LED driving circuit comprises a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a light emitting diode D1, a light emitting diode D2, a triode Q1, a loudspeaker B1, a power socket PWR, a phase inverter U2A, a phase inverter U2B, a phase inverter U2C, a phase inverter U2D, a phase inverter U2E, a voltage stabilizing chip U3, a transmitting transducer J1, a receiving transducer J2, a diode D3, a diode D4, a triode Q2, an operational amplifier U4, an operational amplifier U5, a logarithmic amplifier U6 and an operational amplifier U7.
The pins 21, 22, 23, 39, 38, 37, 36, 35, 34, 33 and 32 of the microcontroller U1 are connected with the pins 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 of the display LCD1 in a one-to-one correspondence manner, and the pin 3 of the display LCD1 is connected with the resistor R4 connected to the ground.
Microcontroller U1's pin 14 and phase inverter U2A's input, phase inverter U2D's input and phase inverter U2E's input are connected, phase inverter U2A's output and phase inverter U2B's input and phase inverter U2C's input are connected, phase inverter U2B's output and phase inverter U2C's output, resistance R6's one end and transmitting transducer J1's one end are connected, resistance R6's the external voltage end VCC of the other end, phase inverter U2D's output and phase inverter U2E's output, resistance R5's one end and transmitting transducer J1's the other end are connected, resistance R5's the external voltage end VCC of the other end.
The one end of receiving transducer J2 is connected with resistance R8's one end, the other end of receiving transducer J2 is connected with diode D3's negative pole and diode D4's anodal back ground connection, resistance R8's the other end is connected with electric capacity C7's one end, electric capacity C7's the other end and electric capacity C8's one end, diode D3's anodal and diode D4's negative pole are connected, electric capacity C8's the other end is connected with resistance R9's one end and triode Q2's base, triode Q2's projecting pole is connected with grounded resistance R11, triode Q2's collecting electrode and resistance R9's the other end, resistance R10's one end and capacitance C9's one end are connected, resistance R10's the external voltage end VCC of the other end, electric capacity C9's the other end is connected with resistance R12's one end.
The other end of the resistor R12 is connected with one end of a capacitor C10, one end of a resistor R14 is connected with a grounded resistor R13, the other end of the resistor R14 is connected with a non-inverting end of an operational amplifier U4 and a grounded capacitor C11, an inverting end of the operational amplifier U4 is connected with one end of a resistor R16 and a grounded resistor R15, the other end of the capacitor C10 is connected with an output end of the operational amplifier U4, one end of the capacitor C12 is connected with the other end of the resistor R16, an anode and a cathode of the operational amplifier U4 are respectively connected with a voltage VCC + and a voltage VCC-, the other end of the capacitor C12 is connected with one end of the capacitor C13 and one end of the resistor R18, the other end of the capacitor C13 is connected with the non-inverting end of the operational amplifier U5 and the grounded resistor R17, an inverting end of the operational amplifier U5 is connected with one end of the resistor R19 and the connected resistor R20, the other end of the resistor R18 is connected with an output end of the operational amplifier U5, the other end of the resistor R19, one end of the capacitor C16 is connected with a grounded resistor R21, and the VCC of the operational amplifier U5 and the cathode are respectively connected with a voltage VCC + and a voltage VCC-.
Pin 1 of the logarithmic amplifier U6 is connected to a grounded capacitor C14, pin 2 of the logarithmic amplifier U6 is grounded, pin 3 of the logarithmic amplifier U6 is connected to a grounded capacitor C15, pin 4 of the logarithmic amplifier U6 is connected to one end of a capacitor C17, pin 5 and pin 6 of the logarithmic amplifier U6 are connected to one end of a resistor R22 and one end of a capacitor C18, pin 7 of the logarithmic amplifier U6 is connected to one end of a capacitor C19, pin 8 of the logarithmic amplifier U6 is connected to the other end of a capacitor C16, the other end of the resistor R22 is externally connected to a voltage terminal VCC, the other end of the capacitor C18 is connected to the other end of the capacitor C19, one end of a resistor R23 and the negative electrode of the operational amplifier U7 and is grounded, the other end of the capacitor C17 is connected to one end of a resistor R24, the other end of the resistor R24 is connected to the non-phase end of the operational amplifier U7 and a grounded resistor R25, the other end of the resistor R23 is connected to the inverted terminal of the operational amplifier U7, one end of the capacitor R26 and the other end of the microcontroller U7, the positive terminal of the operational amplifier VCC is connected to the output terminal of the capacitor C12.
In this embodiment, the crystal oscillator X1 provides the operating frequency, the diode D1 prompts the operating status, the speaker B1 is used as an alarm, the display screen LCD1 can display the detection data, the microcontroller U1 can be connected with a processor, or the output end of the operational amplifier U7 is connected with the processor, when the microcontroller U1 controls the transmitting transducer J1 to emit ultrasonic waves through a plurality of inverters U2A to U2E, the ultrasonic waves are received and converted into electric signals by the receiving transducer J2 after passing through sewage, the electric signals are amplified by the triode Q2, and then are filtered and amplified by a filtering and amplifying circuit mainly composed of the operational amplifier U4, the operational amplifier U5, corresponding resistors and capacitors, and then are amplified by the logarithmic amplifier U6, and finally, the operational amplifier U7 amplifies and outputs the amplified signals to the microcontroller U1 or the processor, and the microcontroller U1 displays the detection data on the display screen LCD1. The voltage terminal VCC, the voltage terminal VCC + and the voltage terminal VCC-can set corresponding voltage according to actual needs, or the voltage terminal VCC connected with the pin 4 of the voltage stabilization chip U3 provides voltage.
In some embodiments, as shown in fig. 12, the circuit of the photoelectric sludge concentration sensor 400 includes a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a light emitter D5, a silicon photocell B1, an amplifier U8, and a transistor Q3, one end of the resistor R27 is connected to one end of the resistor R28, one end of the resistor R29 is connected to a collector of the transistor Q3, and then to an external voltage terminal VCC, the other end of the resistor R27 is connected to an anode of the light emitter D5, a cathode of the light emitter D5 is connected to one end of the silicon photocell B1, one end of the resistor R30 and one end of the resistor R32 are connected to ground, the other end of the resistor R28 is connected to the other end of the silicon photocell B1 and an inverting terminal of the amplifier U8, the other end of the resistor R29 is connected to the other end of the resistor R30 and the inverting terminal of the amplifier U8, an output terminal of the amplifier U8 is connected to one end of the resistor R31, the other end of the resistor R31 is connected to a base of the transistor Q3, and an output terminal VOUT.
In this embodiment, light emitter D5 is generally a light emitting diode that emits light (generally infrared light) having a wavelength that can be absorbed by activated sludge most, and light emitter D5 emits infrared light, and is received by silicon photocell group B1 and converted into an electrical signal through sewage, and the electrical signal is amplified by amplifier U8 and triode Q3 and then output to the processor from output terminal VOUT.
In some embodiments, a database is connected to the processor. The processor can store the detection data into the database after receiving the detection data so as to facilitate the comparison of subsequent calls; similarly, the various "averages" described above may also be stored in the database.
As shown in fig. 3, another aspect of the embodiments of the present specification discloses a method for detecting sludge concentration, which includes the following steps:
s1, stirring the sewage in a pool body 8 through a stirring device 1;
s2, respectively pumping out the sewage on two opposite sides in the tank body 8 through a first delivery pump 2, a second delivery pump 3, a first return pipe 21, a second return pipe 31, a first sludge concentration sensor group 5 and a second sludge concentration sensor group 6, and carrying out sludge concentration detection to obtain the sludge concentration of the sewage on two opposite sides in the tank body 8;
s3, comparing the sludge concentrations of the sewage on the two opposite sides in the tank body 8 through a processor, and taking the mean value of the sludge concentrations as the sludge concentration if the sludge concentrations of the sewage on the two sides are consistent; otherwise, repeatedly executing S1-S2 until the sludge concentration of the sewage on the two sides is consistent, and taking the mean value of the two as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and after the sewage in the tank body 8 is in a relatively static state before stirring, executing the steps S1-S3 again, and taking the sludge concentration obtained in the step S3 as a second sludge concentration;
s5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration is consistent with the second sludge concentration; otherwise, repeatedly executing S1-S4 until the first sludge concentration is consistent with the second sludge concentration, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
In this embodiment, the sludge concentration detection system of any one of the above embodiments is used for detecting the sludge concentration, that is, the embodiments of the sludge concentration detection method may be implemented by the sludge concentration detection system.
The sludge concentration of the sewage on the two opposite sides in the tank body 8 is compared twice, if the sludge concentration is consistent, the average value of the two times is compared, if the sludge concentration is consistent, the sewage in the tank body 8 can be considered to be stirred uniformly, and the average value of the two times (the average value of the first sludge concentration and the second sludge concentration) is taken as the sludge concentration in the tank body 8, namely, the reliability and the accuracy of the detection result are high.
In some embodiments, the sludge concentration detection method further comprises the steps of:
s6, respectively arranging third sludge concentration sensor groups 7 at different heights of the tank body 8 to directly detect the sludge concentrations of the sewage with different heights in the tank body 8;
s7, comparing the sludge concentrations of the sewage with different heights through a processor, and if the sludge concentrations of the sewage with different heights are consistent, taking the mean value of the first sludge concentration and the second sludge concentration obtained in the step S5 as a sludge concentration detection result; otherwise, repeating the step S1 to the step S6 until the sludge concentration of the sewage with different heights is consistent.
In this embodiment, through the mud concentration of the sewage of the comparison co-altitude, if mud concentration is unanimous, then think that the sewage in the cell body 8 has obtained comparatively even stirring, the mud concentration in the cell body 8 is regarded as to the mean value of first mud concentration and second mud concentration promptly, and the reliability and the degree of accuracy of testing result are higher promptly.
In some embodiments, in S7, if the sludge concentrations of the different-height sewage are consistent, taking a mean value of the sludge concentrations of the different-height sewage, and comparing the mean value with the first sludge concentration and the second sludge concentration obtained in S5, and if the mean value of the sludge concentrations of the different-height sewage is consistent with the mean value of the first sludge concentration and the second sludge concentration, taking the mean value as a sludge concentration detection result; otherwise, repeating S1-S6 until the mean value of the sludge concentration of the sewage with different heights is consistent with the mean value of the first sludge concentration and the second sludge concentration.
In this embodiment, the sludge concentrations of the sewage with different heights are compared, if the sludge concentrations are consistent, the average value of the sludge concentrations of the sewage with different heights is compared with the average value of the first sludge concentration and the second sludge concentration, if the sludge concentrations are consistent, the sewage in the tank body 8 is considered to be uniformly stirred, and the average value of the sludge concentrations is compared as the sludge concentration in the tank body 8, namely, the reliability and the accuracy of the detection result are high.
In some embodiments, in S2, the sewage in the middle position between the two opposite sides in the tank body 8 is pumped out and mixed with the sewage in the two opposite sides in the tank body 8, and then the sludge concentration detection is performed.
In the embodiment, after the sewage at the middle position is mixed with the sewage at one side, the sludge concentration is detected to obtain first detection data; mixing the sewage at the middle position with the sewage at the other side, and then carrying out sludge concentration detection to obtain second detection data; if the first detection data and the second detection data are consistent, the sewage in the pool body 8 is considered to be stirred more uniformly, and the reliability and accuracy of the comparison result and the detection result are further improved; that is, the present embodiment is applied in combination with the above embodiments, so that the reliability and accuracy can be further improved.
In some embodiments, the sludge concentration detection system further comprises a memory, the memory is connected with the processor and stores a computer program that can be run on the processor; when the processor executes the computer program, the processor controls the stirring device 1, the first delivery pump 2, the second delivery pump 3, the third delivery pump 4, the first sludge concentration sensor group 5, the second sludge concentration sensor group 6 and the third sludge concentration sensor group 7 to work, so as to realize the sludge concentration detection method.
In some embodiments, the processor is further connected to a display terminal, and the processor displays the various detection data (sludge concentration), the average value, the comparison result and the sludge concentration detection result through the display terminal, so that a worker can conveniently view the results.
In summary, a plurality of specific embodiments of the present invention are disclosed, and under the circumstance of no contradiction, each embodiment can be freely combined to form a new embodiment, that is, embodiments belonging to the alternative scheme can be freely replaced, but cannot be combined with each other; the embodiments which are not alternatives can be combined with each other, and these new embodiments are also the essence of the present invention.
The above embodiments describe a plurality of specific embodiments of the present invention, but it should be understood by those skilled in the art that various changes or modifications may be made to these embodiments without departing from the principle and spirit of the present invention, and these changes and modifications fall within the scope of the present invention.
Claims (9)
1. A sludge concentration detection system is characterized by comprising:
the stirring device is used for stirring the sewage in the tank body;
the first delivery pump and the second delivery pump are respectively arranged on two opposite sides of the top of the tank body and are respectively communicated with the interior of the tank body on one side where the first delivery pump and the second delivery pump are respectively arranged through pipelines;
one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body;
one end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body;
the first sludge concentration sensor group is arranged on the first return pipe so as to detect the sludge concentration of the sewage in the first return pipe;
the second sludge concentration sensor group is arranged on the second return pipe and used for detecting the sludge concentration of the sewage in the second return pipe;
and the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group so as to receive the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group, compare the detection data and take the mean value of the detection data as a sludge concentration detection result if the detection data are consistent with the detection data.
2. The sludge concentration detecting system of claim 1, wherein a third delivery pump is arranged at the top of the tank body, the third delivery pump is located between the first delivery pump and the second delivery pump, an input end of the third delivery pump is communicated with the inside of the tank body below the third delivery pump through a pipeline, an output end of the third delivery pump is respectively communicated with the first return pipe and the second return pipe through pipelines, and two communication points are respectively located between the first delivery pump and the first sludge concentration sensor group and between the second delivery pump and the second sludge concentration sensor group.
3. The sludge concentration detecting system according to claim 2, wherein:
the stirring device includes:
the first stirring mechanism is arranged between the first conveying pump and the third conveying pump;
and the second stirring mechanism is arranged between the second conveying pump and the third conveying pump.
4. The sludge concentration detecting system as claimed in claim 3, wherein a third sludge concentration sensor group is arranged on the side surface of the tank body, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group are respectively arranged on two opposite sides of the tank body so as to detect the sludge concentration of the sewage between the two sides.
5. The sludge concentration detecting system according to claim 4, wherein the first sludge concentration sensor group and/or the second sludge concentration sensor group and/or the third sludge concentration sensor group comprises at least one photoelectric sludge concentration sensor and at least one ultrasonic sludge concentration sensor.
6. A sludge concentration detection method is characterized in that the sludge concentration detection system of any one of claims 1 to 5 is used for sludge concentration detection;
the sludge concentration detection method comprises the following steps:
s1, stirring the sewage in the tank body through a stirring device;
s2, respectively pumping out the sewage on two opposite sides in the tank body through a first delivery pump, a second delivery pump, a first return pipe, a second return pipe, a first sludge concentration sensor group and a second sludge concentration sensor group, and carrying out sludge concentration detection to obtain the sludge concentration of the sewage on two opposite sides in the tank body;
s3, comparing the sludge concentrations of the sewage at two opposite sides in the tank body through a processor, and taking the mean value of the sludge concentrations as the sludge concentration if the sludge concentrations of the sewage at the two sides are consistent; otherwise, repeatedly executing S1-S2 until the sludge concentration of the sewage on the two sides is consistent, and taking the mean value of the two as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and after the sewage in the tank body is restored to a relatively static state before stirring, executing the steps S1-S3 again, and taking the sludge concentration obtained in the step S3 as a second sludge concentration;
s5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration is consistent with the second sludge concentration; otherwise, repeating S1-S4 until the first sludge concentration is consistent with the second sludge concentration, and taking the mean value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
7. The method for detecting sludge concentration according to claim 6, further comprising the steps of:
s6, respectively arranging third sludge concentration sensor groups at different heights of the tank body so as to directly detect the sludge concentrations of the sewage with different heights in the tank body;
s7, comparing the sludge concentrations of the sewage with different heights through a processor, and if the sludge concentrations of the sewage with different heights are consistent, taking the mean value of the first sludge concentration and the second sludge concentration obtained in the step S5 as a sludge concentration detection result; otherwise, repeating the step S1 to the step S6 until the sludge concentration of the sewage with different heights is consistent.
8. The method according to claim 7, wherein in S7, if the sludge concentrations of the different levels of wastewater are consistent, the average value of the sludge concentrations of the different levels of wastewater is taken and compared with the average value of the first sludge concentration and the second sludge concentration obtained in S5, and if the average value of the sludge concentrations of the different levels of wastewater is consistent with the average value of the first sludge concentration and the second sludge concentration, the average value of the first sludge concentration and the second sludge concentration is taken as the sludge concentration detection result; otherwise, repeating S1-S6 until the average value of the sludge concentration of the sewage with different heights is consistent with the average value of the first sludge concentration and the second sludge concentration.
9. The method according to claim 7 or 8, wherein in S2, the sewage at the middle position between the two opposite sides in the tank body is pumped out and mixed with the sewage at the two opposite sides in the tank body, and then the sludge concentration is detected.
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