CN108548910A - A kind of deep dehydration sludge moisture content detection method - Google Patents

Abstract

The invention discloses a water content detection method of deep dewatered sludge. Based on the water content detection device of deep dewatered sludge, at least three electric sliding tables can realize the movement of the probe in three degrees of freedom in space, and can control the movement of the probe in the sewage. The feed rate in the mud cake, when it is about to touch the mud cake, it will perform an air suction action, the metal conical shell is inserted into the mud cake, and a small amount of sludge is sucked in, and when the sludge particles pass through the moisture sensor, the water content is recorded , after measuring one point, the third electric sliding table rises, in order to measure the sludge water content at another point next time, ventilate through the air pipe, spit out the existing sludge particles, and measure again. The invention can accurately and efficiently measure the water content at different positions and thicknesses of the mud cake, and improves the reliability of detection by improving the water content detection probe.

Description

A method for detecting water content of deep dewatered sludge

technical field

The invention relates to the technical field of detecting the water content of sludge, in particular to a method for detecting the water content of deep dewatered sludge.

Background technique

Sludge moisture content detection is an important indicator to judge and evaluate the sludge dewatering effect. The sludge cake after deep dehydration and pressing is generally relatively hard. In the prior art, a small piece is usually removed from the sludge cake, and then the moisture content of the sludge is calculated through weight measurement, drying and other processes.

There are many defects in the above-mentioned method of detecting the moisture content of sludge in the prior art, for example, it requires a lot of manpower to operate; for sludge with different thicknesses, the moisture content is different, and it is difficult to directly measure different thicknesses in the method of the prior art The moisture content of the sludge can only be done manually and with measuring tools. However, the moisture content of different positions and thicknesses of the sludge cake plays an important role in characterization and comparison for the study of sludge dewatering characteristics. How to accurately and efficiently complete the above detection requirements is an important issue in the detection of sludge moisture content.

Contents of the invention

In view of this, the object of the present invention is to provide a method for detecting the water content of deep dewatered sludge that accurately and efficiently measures the water content of different positions and thicknesses of the mud cake, so as to solve the technical problems existing in the prior art.

The technical solution of the present invention is to provide a deep dewatered sludge water content detection method with the following structure, based on a deep dewatered sludge water content detection device, the deep dewatered sludge water content detection device includes a water content detection probe and at least Three electric slides, the three electric slides include a first electric slide, a second electric slide and a third electric slide, the first electric slide and the second electric slide are arranged vertically, The second electric slide is fixed on the slider of the first electric slide, the third electric slide is perpendicular to the first electric slide and the second electric slide respectively, and the third electric slide The table is fixed on the slide block of the second electric slide table; the moisture content detection probe is connected to the slide block of the third electric slide table through a connecting piece.

Optionally, the first electric slide, the second electric slide and the third electric slide each include a motor, a screw and a slider, the output shaft of the motor is axially connected to the screw, so The slide block is arranged on the slide rail of the corresponding electric slide table, and the screw mandrel is threaded in the slide block.

Optionally, the moisture content detection probe includes a conical housing and a first moisture sensor, a conical hole is opened in the conical housing, and the first moisture sensor is arranged on the hole wall of the conical hole, The conical shell is also provided with a trachea connection port, and the trachea connection port communicates with the tapered hole.

Optionally, the opening of the tapered hole is set at the tip of the tapered shell, and the opening is used as a sampling port for moisture content detection, and the tip is covered with an elastic strain sleeve, and the elastic strain The sleeve is provided with a pressure sensor.

Optionally, a cylinder is connected to the bottom end of the conical shell, and the trachea connection port is arranged on the cylinder.

Optionally, the connecting piece is an L-shaped structure, one side of the L-shaped structure is fitted and fixed to the slider of the third electric slide table, and the other side of the L-shaped structure is provided with a screw hole, and the The cylinder is provided with an external thread, and the cylinder is screwed into the screw hole through the external thread on the cylinder.

Optionally, a tapered guiding path is provided in the cylinder, the small-diameter end of the tapered guiding path communicates with the tapered hole, and the large-diameter end communicates with the trachea connection port.

Optionally, the moisture content detection device further includes an air blowing device, the air blowing device is connected to the connection port of the air pipe through an air pipe, and a second moisture sensor is arranged in the air pipe.

Optionally, a sludge particle accommodation cavity is provided inside the conical housing, and the sludge particle accommodation cavity is connected to the large-diameter end of the conical hole, and an air outlet is opened on the wall of the conical housing, so that The air outlet is in communication with the sludge particle containing chamber, and the outer end of the air outlet is connected with air suction equipment.

Optionally, a conductive rod is connected to the conical shell, and the conical shell is negatively charged by passing a negative charge to the conductive rod when measuring the water content; after the measurement is completed, the conductive rod is given a positive charge, and the principle of repulsion The water molecules are precipitated, ventilated to the trachea, and the water is discharged.

Compared with the prior art, the present invention has the following advantages: at least three electric slides can realize the movement of the probe with three degrees of freedom in space, and can control the feed rate of the probe in the sludge cake. When it is about to touch the mud cake, it performs an air suction action. The metal conical shell is inserted into the mud cake to suck a small amount of sludge in. When the sludge particles pass through the moisture sensor, record the water content. After measuring a point, the third electric slide Ascent, in order to measure the water content of sludge at another point next time, ventilate through the trachea, spit out the existing sludge particles, and measure again. The invention can accurately and efficiently measure the water content at different positions and thicknesses of the mud cake, and improves the reliability of detection by improving the water content detection probe.

Description of drawings

Fig. 1 is the structural representation of the deep dewatered sludge water content detection device;

Fig. 2 is a schematic structural diagram of the electric slide table;

Fig. 3 is a schematic structural diagram of a moisture content detection probe.

As shown in the figure, 1. Motor, 2. Screw rod, 3. Slider, 4. Tapered shell, 5. Tapered guide, 6. Air pipe connection port, 7. First moisture sensor, 8. Air pipe, 9. Second moisture sensor, 10, air outlet, 11, sludge particle holding chamber, 12, elastic strain sleeve, 13, conductive rod, 14, cylinder, 15, connector, 16 sludge cake, 17, moisture content detection probe.

Detailed ways

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

Referring to Figure 1, it illustrates the structure of the deep dewatered sludge water content detection device, including a water content detection probe and at least three electric slides. In this embodiment, three electric slides are used as examples. The three electric slides include the first An electric slide table X, a second electric slide table Y and a third electric slide table Z, the first electric slide table X and the second electric slide table Y are arranged vertically, and the second electric slide table Y is fixed on On the slider of the first electric slide table X, the third electric slide table Z is perpendicular to the first electric slide table X and the second electric slide table Y respectively, and the third electric slide table Z is fixed on the The slider of the second electric sliding table Y; the moisture content detection probe 17 is connected to the slider of the third electric sliding table Z through a connecting piece 15 .

The connecting piece 15 is an L-shaped structure, one side of the L-shaped structure is attached and fixed to the slider 3 of the third electric slide table Z, the other side of the L-shaped structure is provided with a screw hole, and the column The body 14 is provided with an external thread, and the cylinder is screwed into the screw hole through the external thread on the cylinder.

Referring to FIG. 2 , a specific structure of the electric slide table is illustrated. Wherein the first electric slide table X, the second electric slide table Y and the third electric slide table Z can all adopt this structure, that is to say, all three of them include a motor 1, a screw rod 2 and a slider 3 respectively, so The output shaft of the motor 1 is axially connected to the screw rod 2 , the slider 3 is arranged on the slide rail of the corresponding electric slide table, and the screw rod 2 is threaded inside the slider 3 . The three electric slides realize the movement of three degrees of freedom in space respectively, so that the probe can reach any point in space within a certain range.

Referring to FIG. 3 , a specific structure of the moisture content detection probe is illustrated, and the moisture content detection probe is illustrated from the front view, section view and axial side. The moisture content detection probe 17 includes a conical housing 4 and a first moisture sensor 7, a conical hole is provided in the conical housing 4, and the first moisture sensor 7 is arranged on the hole wall of the conical hole , The conical shell 4 is also provided with a trachea connection port 6, and the trachea connection port 6 communicates with the conical hole.

The opening of the tapered hole is arranged at the tip of the conical shell 4, and the opening is used as a sampling port for moisture content detection, and the tip is covered with an elastic strain sleeve 12, and the elastic strain sleeve 12 Built-in pressure sensor.

The bottom surface end of the conical shell 4 (although it is the bottom surface end from a geometrical point of view, it is located at the top of the conical shell 4 in the view) is connected with a column 14, and the trachea connection port 6 is arranged on on the column 14.

The cylindrical body 14 is provided with a tapered guideway 5 , the small-diameter end of the tapered guideway 5 communicates with the tapered hole, and the large-diameter end communicates with the trachea connection port 6 . In addition, in order to further achieve the purpose of the present invention. The water content detection device also includes an air blowing device, which is connected to the air pipe connection port 6 through an air pipe 8 , and a second moisture sensor 9 is arranged in the air pipe 8 . Although the drawing is not used to illustrate the air blowing device, those skilled in the art can implement it according to the teaching of the present invention.

The conical housing 4 is provided with a sludge particle accommodating cavity 11, the sludge particle accommodating cavity 11 is connected to the large diameter end of the conical hole, and an air outlet 10 is provided on the wall of the conical housing 4, The air outlet hole 10 is in communication with the sludge particle containing chamber 11, and the outer end of the air outlet hole 10 is connected with a suction device.

The conical shell 4 is connected with a conductive rod 13, and when the water content is measured, the conductive rod 13 is charged with a negative charge, so that the conical shell 4 is negatively charged; after the measurement is completed, the conductive rod 13 is given a positive charge, and the principle of repulsion is used. , the water molecules are separated out, ventilated to the trachea 8, and the water is discharged.

The basic principle of the present invention is as follows: at least three electric slides can realize the three-degree-of-freedom movement of the probe in space, and can control the feed rate of the probe in the sludge cake. Suction action, the metal conical shell is inserted into the mud cake, and a small amount of sludge is sucked in. When the sludge particles pass through the moisture sensor, the water content is recorded. After a point is measured, the third electric sliding table rises to facilitate the next measurement. A little sludge water content, ventilate through the air pipe, spit out the existing sludge particles, and measure again. If the sludge particles are large, the conical hole is designed. When the sludge particles cannot be spit out, the conical shell is removed and the particles are poured out. The conical shell is made of metal, such as steel, so as to have sufficient rigidity and strength to insert the mud cake.

The present invention comprises the following working phases:

Pre-measurement stage: when the moisture content detection probe 17 is about to touch the sludge layer, a control signal is given to the pressure sensor inside the elastic strain sleeve at the front end. Measurement. If the pressure of the sludge layer is too large or the sludge compaction is too large, the conical shell 4 may be damaged. Feedback signal at this time, that is to change a coordinate to measure. If it is within the acceptable range, the Z-axis will be lowered and the formal inspection will be carried out.

Formal detection stage: After the conical shell 4 has been inserted into the sludge layer, the 8 air pipes are used to inhale, and a small amount of sludge particles are sucked into the probe, which will pass through the first moisture detection sensor 7 . The first moisture detection sensor 7 is arrayed in the inner tapered hole. Perform data collection. In order to prevent the inhaled sludge particles from being too small and too fast, they will enter the air pump through the tapered guideway 5, and the second moisture detection sensor 9 in the air pipe 8 is specially designed to detect the moisture again. If the second moisture detection sensor 9 No new data is generated, indicating normal. If there is new data in the second moisture detection sensor 9, then show that measurement is inaccurate, need to adjust and reduce air suction force.

Since the sludge particle holding chamber 11 is set up, because the instrument only absorbs a small amount of sludge, in order to be able to measure quickly and at multiple points, its holding function is increased, but in order to prevent the larger sludge particles from being blocked or the sludge already contained There is a lot of mud, and the vent hole 10 is specially opened. This hole is connected with an external air suction device. When the instrument data fails to capture new data, it starts to extract sludge particles and suck out the sludge particles that have been sucked out.

When measuring the sludge treated by electroosmosis, the water molecules in the sludge are positively charged, so the conductive rod 13 is designed. When the moisture content detection probe 17 has sucked a small amount of sludge, the conductive rod 13 is given a negative charge so that the conical shell has a positive charge. Negative electricity. At this time, because of the attraction effect of positive and negative charges, the water molecules in the sludge can enter the sensor 7 more. Measurement data is more accurate. After the measurement is completed, the conductive rod 13 is given a positive charge, and the water molecules in the sensor are separated out by using the principle of repulsion, and then the trachea 8 is ventilated to discharge the water.

When everything is completed, the 8 air pipes are exhaled to remove all the sludge. When there is relatively large sludge on the wall and it is difficult to take it out, the conical shell 4 is separated from the column body 14, because the column body 14 is provided with a conical guide path 5, which can be cleaned.

Although the above embodiments are described and illustrated separately, some common technologies are involved, and in the eyes of those of ordinary skill in the art, the embodiments can be replaced and integrated, and the content that is not clearly recorded in one of the embodiments can be Reference is made to another example documented.

The implementation methods described above do not limit the protection scope of the technical solution. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above implementation methods shall be included in the protection scope of the technical solution.

Claims (10)

1. A deep dewatered sludge water content detection method, based on a deep dewatered sludge water content detection device, is characterized in that: the deep dewatered sludge water content detection device includes a water content detection probe (9) and at least three motorized Slider, the three electric slides include the first electric slide X, the second electric slide Y and the third electric slide Z, the first electric slide X and the second electric slide Y are vertical Set, the second electric slide table Y is fixed on the slider of the first electric slide table X, the third electric slide table Z is perpendicular to the first electric slide table X and the second electric slide table Y respectively, And the third electric slide table Z is fixed on the slider of the second electric slide table Y; the moisture content detection probe (17) is connected to the third electric slide table Z through a connector (15). on the slider. 2. The method for detecting the water content of deep dewatered sludge according to claim 1, characterized in that: the first electric slide table X, the second electric slide table Y and the third electric slide table Z all include motors (1 ), screw rod (2) and slider (3), the output shaft of the motor (1) is axially connected with the screw rod (2), and the slider (3) is arranged on the slide of the corresponding electric slide table On the rail, the threaded mandrel (2) is threaded in the slider (3). 3. The method for detecting water content of deep dewatered sludge according to claim 2, characterized in that: the water content detection probe (9) includes a conical shell (4) and a first moisture sensor (7), the cone A tapered hole is provided in the shaped shell (4), the first moisture sensor (7) is arranged on the hole wall of the tapered hole, and a trachea connection port (6) is also provided on the tapered shell (4). ), the trachea connection port (6) is in communication with the tapered hole; the conical shell (4) is inserted into the sludge layer, and the trachea (8) sucks air, and a small amount of sludge particles are sucked into the probe Inside, it will pass through the first moisture detection sensor (7), and the data collection will be performed by the first moisture detection sensor (7). 4. The method for detecting water content of deep dewatered sludge according to claim 3, characterized in that: the opening of the tapered hole (5) is arranged at the tip of the tapered shell (4), and the opening As the sampling port for moisture content detection, the tip outer jacket is provided with an elastic strain sleeve (12), and the elastic strain sleeve (12) is provided with a pressure sensor; the pre-measurement stage is set: when the moisture content detection probe (17) When it is about to touch the sludge layer, a control signal is given to the pressure sensor in the elastic strain sleeve at the front end, and when it comes into contact with the sludge cake in advance, the pressure of the sludge is measured. 5. The method for detecting water content of deep dewatered sludge according to claim 3, characterized in that: the bottom end of the conical shell (4) is connected with a cylinder (14), and the air pipe connection port (6) Set on the column (14). 6. The method for detecting water content of deep dewatered sludge according to claim 1, characterized in that: the connecting piece (15) is an L-shaped structure, and one side of the L-shaped structure is connected to the third electric sliding table Z The sliding block is fit and fixed, the other side of the L-shaped structure is provided with a screw hole, and the cylinder (14) is provided with external threads, and the cylinder (14) is screwed to the inside the screw hole. 7. The method for detecting the water content of deep dewatered sludge according to claim 5, characterized in that: the column (14) is provided with a tapered guide (5), and the tapered guide (5) The small-diameter end communicates with the tapered hole, and the large-diameter end communicates with the trachea connection port (6). 8. The water content detection method of deep dewatered sludge according to claim 7, characterized in that: the water content detection device also includes a blowing and suction device, and the blowing and suction device passes through the air pipe (8) and the air pipe The connecting ports (6) are connected with each other, and a second moisture sensor (9) is arranged in the air pipe (8). 9. The method for detecting the water content of deep dewatered sludge according to claim 7, characterized in that: the conical housing (4) is provided with a sludge particle holding chamber (11), and the sludge particle holding chamber ( 11) Connect with the large-diameter end of the tapered hole, the wall of the tapered housing (4) is provided with an air outlet (10), the air outlet (10) is connected to the sludge particle holding chamber (11) Connected with each other, the outer end of air outlet (10) is connected with air-suction equipment. 10. The method for detecting the water content of deep dewatered sludge according to claim 8, characterized in that: the conical shell (4) is connected with a conductive rod (13), and the conductive rod (13) is passed to the conductive rod (13) when the water content is measured. ) into the negative charge to make the conical shell (4) negatively charged; after the measurement is completed, give the conductive rod (13) a positive charge, and use the principle of repulsion to separate out water molecules and ventilate to the trachea (8) to discharge the water.