Environmentally friendly sludge sampling and processing method and equipment

Abstract

The present invention relates to the technical field of sludge sampling devices, and specifically to an environmentally friendly sludge sampling and processing method and equipment, the method comprising: determining the sludge density factor at different sampling times according to the sludge water content at the bottom of the sampling tube and the descending resistance of the sampling tube at different sampling times during the sampling process of the sludge in the sampling tube; estimating the sludge density index at different heights in the sampling tube during the process of pushing the sludge in the sampling tube into the sludge storage area according to the sludge density factor; determining the rate adjustment factor corresponding to the pushing time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge residual height corresponding to the pushing time to be adjusted, and the average sludge particle size corresponding to the pushing time to be adjusted; based on the rate adjustment factor, controlling and adjusting the base propulsion rate and the impeller rotation rate at the pushing time to be adjusted. The present invention realizes the control and adjustment of the base propulsion rate and the impeller rotation rate, and improves the sludge treatment efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sludge sampling devices, and in particular to an environmentally friendly sludge sampling and processing method and equipment. Background Art

[0002] Environmentally friendly sludge sampling and treatment methods are often implemented through environmentally friendly sludge sampling and treatment equipment. Environmentally friendly sludge sampling and treatment equipment can be used to collect and treat sludge at the bottom of water bodies. Environmentally friendly sludge sampling and treatment equipment is of great significance in water quality monitoring, environmental protection and scientific research. It aims to obtain sludge samples and conduct preliminary treatment in an environmentally friendly and efficient manner. It can collect and treat sludge samples efficiently and accurately while reducing human intervention, which helps to accurately monitor and evaluate water pollution. Filters play an important role in sludge treatment, especially in sludge treatment devices. For example, filters can be used to break up sludge to facilitate subsequent sludge treatment such as sludge composition detection. Filters are often installed between the sampling tube and the sludge storage area.

[0003] At present, when the sludge is pushed from the sampling tube into the storage area by the sludge sampling equipment, the sludge sampling is often carried out by using a fixed bottom propulsion rate and a fixed impeller rotation rate set by artificial experience. However, due to the difference in the water content of the sludge at different depths, the sludge density at different heights of the sampling tube is often different. When the fixed bottom propulsion rate and impeller rotation rate are used throughout the sludge sampling process, the propulsion may be slow or impossible at the location with higher sludge density, thereby causing the sampling tube to be blocked, making it difficult to break up the denser sludge, resulting in poor efficiency of subsequent sludge treatment. Summary of the invention

[0004] In order to solve the technical problem of poor sludge treatment efficiency, the present invention proposes an environmentally friendly sludge sampling and treatment method and equipment.

[0005] In a first aspect, the present invention provides an environmentally friendly sludge sampling and processing method, the method comprising:

[0006] According to the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the silt sampling process, the silt density factor at different sampling times is determined;

[0007] According to the silt density factor at all sampling moments, the silt density index at different heights in the sampling tube during the process of pushing the silt in the sampling tube into the silt storage area is estimated;

[0008] Determine the rate adjustment factor corresponding to the push-in time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge remaining height corresponding to the push-in time to be adjusted, and the average sludge particle size at the top of the sampling tube at the sludge remaining height corresponding to the push-in time to be adjusted, wherein the push-in time to be adjusted is the time when the sludge is pushed into the sludge storage area;

[0009] Based on the speed adjustment factor, the base advancement speed and the impeller rotation speed at the time of pushing in to be adjusted are controlled and adjusted, wherein the impeller rotation speed is the rotation speed of the rotating impeller.

[0010] Optionally, the sludge density factor at different sampling times is determined according to the sludge water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the sludge sampling process of the sampling tube, including:

[0011] The distance between the top of the sampling tube and the surface of the area to be sampled at different sampling times during the sludge sampling process of the sampling tube is determined as the reference distance at different sampling times, wherein the area to be sampled is the sludge area where the sludge is sampled by the sampling tube;

[0012] The silt density factor at each sampling moment is determined based on the reference distance at each sampling moment, the water content of the silt at the bottom of the sampling tube and the downward resistance of the sampling tube.

[0013] Optionally, determining the silt density factor at each sampling moment according to the reference distance at each sampling moment, the silt water content at the bottom of the sampling tube, and the downward resistance of the sampling tube includes:

[0014] The ratio of the reference distance at each sampling moment to the height value of the sampling tube obtained in advance is determined as the target distance factor at each sampling moment;

[0015] Based on the target distance factor at each sampling moment, the silt insertion depth at each sampling moment is determined, wherein the target distance factor is negatively correlated with the silt insertion depth, and the silt insertion depth represents the depth of the bottom of the sampling tube inserted into the silt;

[0016] The silt density factor at each sampling moment is determined according to the silt insertion depth, the silt water content at the bottom of the sampling tube and the descending resistance of the sampling tube at each sampling moment, wherein the silt insertion depth and the descending resistance of the sampling tube are positively correlated with the silt density factor, and the silt water content at the bottom of the sampling tube is negatively correlated with the silt density factor. The silt density factor at the sampling moment characterizes the silt density at the bottom of the sampling tube at that sampling moment.

[0017] Optionally, the method of estimating the sludge density index at different heights in the sampling tube during the process of pushing the sludge in the sampling tube into the sludge storage area according to the sludge density factor at all sampling moments includes:

[0018] According to the sampling time from late to early, the silt density factors at all sampling times in the silt sampling process of the sampling tube are sorted to obtain a silt density factor sequence, wherein the sampling tube is inserted into the silt at a uniform speed in the silt sampling process of the sampling tube;

[0019] Divide the height of the sampling tube into a target number of scales, and sort the target number of scales in order from low to high to obtain a scale sequence, wherein the target number is equal to the number of silt density factors in the silt density factor sequence;

[0020] The silt density factors in the silt density factor sequence are sequentially used as the silt density factors corresponding to the scales in the scale sequence;

[0021] The scale of the sampling tube is used as the abscissa and the silt density factor corresponding to the scale is used as the ordinate for fitting to obtain the silt density index at each height on the sampling tube.

[0022] Optionally, the method of determining the rate adjustment factor corresponding to the pushing time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge remaining height corresponding to the pushing time to be adjusted, and the average sludge particle size at the top of the sampling tube at the sludge remaining height corresponding to the pushing time to be adjusted, comprises:

[0023] The remaining height of the sludge corresponding to the moment of pushing in to be adjusted corresponds to the height on the sampling tube, and is determined as the reference height;

[0024] Determine the target sludge characteristics corresponding to the push-in time to be adjusted according to the sludge density index at the reference height and the height below it, and the average sludge particle size at the top of the sampling tube at the sludge residual height corresponding to the push-in time to be adjusted;

[0025] Similarly, the standard silt characteristics are determined based on the silt density index at all heights on the sampling tube and the average silt particle size at the top of the sampling tube when the sampling tube is filled with silt;

[0026] The rate adjustment factor corresponding to the pushing-in time to be adjusted is determined according to the standard sludge characteristics and the target sludge characteristics corresponding to the pushing-in time to be adjusted.

[0027] Optionally, the formula corresponding to the target sludge characteristic corresponding to the push-in time to be adjusted is:

[0028] ;in, is the target sludge characteristic corresponding to the push-in time to be adjusted; is a normalized function; R is the average silt particle size at the top of the sampling tube at the silt residual height corresponding to the moment of pushing to be adjusted; m is the number of candidate heights; the candidate height is the reference height or the height below the reference height; h is the sequence number of the candidate height; is the silt density index at the hth candidate height.

[0029] Optionally, determining the rate adjustment factor corresponding to the pushing time to be adjusted according to the standard sludge characteristics and the target sludge characteristics corresponding to the pushing time to be adjusted includes:

[0030] If the target sludge characteristic is less than or equal to the standard sludge characteristic, a preset non-negative factor is determined as a rate adjustment factor corresponding to the push-in time to be adjusted;

[0031] If the target sludge characteristic is greater than the standard sludge characteristic, the difference between the target sludge characteristic and the standard sludge characteristic is determined as the target difference, and the sum of the target difference and the preset non-negative factor is determined as the rate adjustment factor corresponding to the push-in time to be adjusted.

[0032] Optionally, the controlling and adjusting the base propulsion rate and the impeller rotation rate at the moment of pushing in to be adjusted based on the rate adjustment factor includes:

[0033] If the speed adjustment factor is greater than the preset non-negative factor, the target base propulsion speed is determined according to the preset base propulsion speed and the speed adjustment factor, and the base propulsion speed at the time of the push-in to be adjusted is adjusted to the target base propulsion speed, wherein the preset base propulsion speed and the speed adjustment factor are both positively correlated with the target base propulsion speed;

[0034] If the speed adjustment factor is equal to the preset non-negative factor, the base advancement speed at the time of the push-in to be adjusted is adjusted to the preset base advancement speed;

[0035] The impeller rotation speed at the push-in moment to be adjusted is controlled and adjusted according to the speed adjustment factor and the preset non-negative factor.

[0036] Optionally, controlling and adjusting the impeller rotation rate at the push-in moment to be adjusted according to the rate adjustment factor and the preset non-negative factor includes:

[0037] If the speed adjustment factor is greater than the preset non-negative factor, a target impeller rotation speed is determined according to the preset impeller rotation speed and the speed adjustment factor, and the impeller rotation speed at the time of the push-in adjustment is adjusted to the target impeller rotation speed, wherein the preset impeller rotation speed and the speed adjustment factor are both positively correlated with the target impeller rotation speed;

[0038] If the speed adjustment factor is equal to the preset non-negative factor, the impeller rotation speed at the time of push-in to be adjusted is adjusted to the preset impeller rotation speed.

[0039] In a second aspect, the present invention provides an environmentally friendly sludge sampling and processing device, which includes a data processor, and the data processor is used to implement the method in the above-mentioned first aspect or any possible implementation method of the first aspect.

[0040] The present invention has the following beneficial effects:

[0041] An environmentally friendly sludge sampling and processing method of the present invention realizes the control and adjustment of the base propulsion rate and the impeller rotation rate, solves the technical problem of poor sludge processing efficiency, and improves the sludge processing efficiency. In actual situations, when the base propulsion rate and the impeller rotation rate are larger, it often means that it is easier to break up the sludge with high density and push it into the sludge storage area. On the contrary, it may cause the problem of slow propulsion or failure to propel at the location with high sludge density, thereby causing the sampling tube to be blocked. Compared with the sludge sampling and processing by the fixed bottom propulsion rate and impeller rotation rate set by artificial experience, the present invention comprehensively considers multiple factors related to sludge density, such as the water content of the sludge at the bottom of the sampling tube, the descending resistance of the sampling tube, the sludge density factor, the sludge density index and the average sludge particle size, so as to adaptively control and adjust the base propulsion rate and the impeller rotation rate at the time of pushing in, realize the precise adjustment of the base propulsion rate and the impeller rotation rate, thereby reducing the possibility of clogging of the sampling tube to a certain extent, and then improving the subsequent sludge processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the overall structure of the sludge sampling and processing device of the present invention;

[0044] Figure 2 It is a cross-sectional schematic diagram of the sludge sampling and processing device of the present invention;

[0045] Figure 3 It is an axonometric assembly schematic diagram of the sludge sampling and processing device of the present invention;

[0046] Figure 4 A flow chart of an environmentally friendly sludge sampling and processing method of the present invention;

[0047] The reference numerals include: 101 is a sampler, 102 is a base, 1 is a small rotating motor, 2 is a sludge storage area, 3 is a rotating impeller, 4 is a particle size analyzer, 5 is a screw propeller, 6 is a sampling tube, 7 is a bottom cover, 8 is an integrated sensor, 9 is a piston propulsion base, 10 is a base outer shell, 11 is a piston propeller, and 12 is a filter. DETAILED DESCRIPTION

[0048] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the technical solutions proposed by the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0049] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0050] The embodiment of the present invention provides an environmentally friendly sludge sampling and processing equipment, including a sludge sampling and processing device, which includes a sampling tube, a sludge storage area, a filter between the sampling tube and the sludge storage area, a particle size analyzer, an integrated sensor, a base, and a rotating impeller. As a specific implementation method, the overall structure of the sludge sampling and processing device is as follows: Figure 1 As shown, the cross-sectional schematic diagram of the sludge sampling and processing device is as follows Figure 2 As shown, the axonometric assembly diagram of the sludge sampling and processing device is as follows Figure 3 As shown, the sludge sampling and processing device mainly includes: a sampler 101 and a base 102. The sampler 101 may include: a small rotating motor 1, a sludge storage area 2, a rotating impeller 3, a particle size analyzer 4, a screw propeller 5, a sampling tube 6, a bottom cover 7, an integrated sensor 8 and a filter 12. The pore size of the filter 12 can be pre-set, representing the maximum size of the sludge particles allowed after the sludge is broken up. The base 102 may include: a piston propulsion base 9, a base outer shell 10 and a piston propeller 11.

[0051] When collecting sludge, place the sampler 101 on the surface of the sludge to be sampled, then control the screw propeller 5 to gradually insert the sampling tube 6 into the sludge, so that the sludge gradually fills the sampling tube 6, then start the bottom cover 7 to seal the bottom of the sampling tube 6, and slowly retract the sampling tube 6 into the sampler 101 through the screw propeller 5 again. Then, the base 102 is engaged with the sampler 101, and the piston propeller 11 is started. The sludge in the sampling tube 6 is pushed upward to the sludge storage area 2 through the piston propulsion base 9. The sludge is broken up into the storage area by the piston propulsion base 9 and the rotating impeller 3 at the top of the sampling tube 6, until the piston propulsion base 9 is pushed to the bottom of the sampling tube, and the storage area is closed, so as to facilitate the subsequent analysis and processing of the sludge. The sludge sampling and processing device is a relatively common mechanical device for sludge sampling and processing.

[0052] The sludge sampling and processing equipment provided by the embodiment of the present invention may include Figure 1 The sludge sampling and processing device and the data processor shown in the figure. The data processor can be used to implement the following Figure 4 The process of an environmentally friendly sludge sampling and processing method is shown. The signal output end of the particle size analyzer 4 and the integrated sensor 8 is connected to the signal input end of the data processor. The data processor can be a conventional processor chip such as a single-chip microcomputer, such as: FPGA (Field Programmable Gate Array, field programmable logic gate array), CPU (Central Processing Unit, central processing unit), MCU (Main Computational Unit, main computing unit) and the like.

[0053] The data processor can be installed on the sludge sampling and processing device, for example, on the base 102 or in the free space in the base 102, wherein the free space can be the space in the base 102 except the piston propulsion base 9 and the piston propeller 11. Moreover, the particle size analyzer and the data processor can adopt wired communication mode or wireless communication mode. The integrated sensor and the data processor can adopt wired communication mode or wireless communication mode.

[0054] The embodiment of the present invention can collect data through a particle size analyzer and an integrated sensor. The specific collection method may include the following steps:

[0055] The first step is to obtain the sludge water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the sludge sampling process of the sampling tube.

[0056] Among them, the sampling tube sludge sampling process can be a process of gradually inserting the sampling tube into the area to be sampled from the bottom of the sampling tube, so that the sampling tube is gradually filled with sludge. The area to be sampled can be a sludge area where the sampling tube samples sludge, and the sludge components in the area to be sampled can be analyzed and processed later. The sampling moment can be a moment in the sampling tube sludge sampling process. The duration between adjacent sampling moments can be the same. For example, the duration between adjacent sampling moments can be 0.5 seconds. The sludge water content at the bottom of the sampling tube at the sampling moment can represent the water content of the sludge at the bottom of the sampling tube at the sampling moment; that is, in the process of gradually inserting the sampling tube into the area to be sampled, the water content of the sludge entering the bottom of the sampling tube at the sampling moment; or in the process of gradually inserting the sampling tube into the area to be sampled, the water content of the sludge at the depth of the area to be sampled where the bottom of the sampling tube is inserted at the sampling moment. The descending resistance of the sampling tube can represent the resistance encountered by the bottom of the sampling tube when the sludge is inserted.

[0057] For example, the integrated sensor installed on the outer bottom of the sampling tube can collect the sludge moisture content at the bottom of the sampling tube and the downward resistance of the sampling tube at each sampling moment. Among them, the integrated sensor of the embodiment of the present invention can be used to collect the sludge moisture content and the downward resistance of the sampling tube. The integrated sensor actually integrates multiple sensor functions on one chip. The integrated sensor of the embodiment of the present invention can be a chip that integrates the functions of a sludge moisture sensor and a force sensor.

[0058] In the second step, the particle size analyzer is used to collect the average sludge particle size at the top of the sampling tube at each moment during the process of pushing the sludge in the sampling tube into the sludge storage area.

[0059] The particle size analyzer is used to collect the average sludge particle size and can be installed at the top of the sampling tube. The average sludge particle size at the top of the sampling tube can be the average particle size of the sludge located at the top of the sampling tube.

[0060] refer to Figure 4 , shows the process of some embodiments of an environmentally friendly sludge sampling and processing method according to the present invention. The environmentally friendly sludge sampling and processing method comprises the following steps:

[0061] Step S1, determining the sludge density factor at different sampling times according to the sludge water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the sludge sampling process of the sampling tube.

[0062] As an example, this step may include the following steps:

[0063] In the first step, the distance between the top of the sampling tube and the surface of the area to be sampled at different sampling times during the sludge sampling process of the sampling tube is determined as the reference distance at different sampling times.

[0064] The area to be sampled may be a sludge area where sludge sampling is performed by a sampling tube.

[0065] For example, the reference distance may be obtained by using a distance sensor to collect the distance between the top of the sampling tube and the surface of the area to be sampled at each sampling moment as the reference distance at each sampling moment.

[0066] The second step is to determine the silt density factor at each sampling moment according to the reference distance at each sampling moment, the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube, which may include the following sub-steps:

[0067] In the first sub-step, the ratio of the reference distance at each sampling moment to the height value of the sampling tube acquired in advance is determined as the target distance factor at each sampling moment.

[0068] The height value of the sampling tube can represent the height of the sampling tube, that is, the distance between the top and the bottom of the sampling tube.

[0069] The second sub-step is to determine the sludge insertion depth at each sampling moment based on the target distance factor at each sampling moment.

[0070] The target distance factor may be negatively correlated with the silt insertion depth. The silt insertion depth may characterize the depth of the bottom of the sampling tube inserted into the silt.

[0071] The third sub-step is to determine the silt density factor at each sampling moment according to the silt insertion depth, the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube at each sampling moment.

[0072] Among them, the silt insertion depth and the sampling tube descending resistance can be positively correlated with the silt density factor. The silt water content at the bottom of the sampling tube can be negatively correlated with the silt density factor. The silt density factor at the sampling moment can characterize the silt density at the bottom of the sampling tube at the sampling moment.

[0073] For example, the formula for determining the silt density factor at the sampling time can be:

[0074] ;

[0075] ;in, is the silt density factor at the i-th sampling moment in the silt sampling process of the sampling tube. i is the sequence number of the sampling moment in the silt sampling process of the sampling tube. is a normalization function. It is the sludge insertion depth at the i-th sampling moment during the sludge sampling process of the sampling tube. It is the downward resistance of the sampling tube at the i-th sampling moment during the sludge sampling process of the sampling tube. is a natural exponential function. It is the water content of the sludge at the bottom of the sampling tube at the i-th sampling moment during the sludge sampling process in the sampling tube. It is the reference distance at the i-th sampling moment during the sludge sampling process of the sampling tube. H is the height value of the sampling tube. It is the target distance factor at the i-th sampling moment during the sludge sampling process in the sampling tube.

[0076] It should be noted that in actual situations, the shallower the silt area, the lower the silt density; the deeper the silt area, the higher the silt density. The smaller it is, the smaller the reference distance is at the i-th sampling moment. The closer the top of the sampling tube is to the surface of the sampling area at the i-th sampling moment. The more the sampling tube is inserted into the sludge area at the i-th sampling moment. The more likely the bottom of the sampling tube is to be located deeper in the sludge at the i-th sampling moment. The greater the sludge density at the bottom of the sampling tube at the i-th sampling moment. In actual situations, when the sampling tube is inserted into high-density sludge, the resistance encountered by the sampling tube is often greater. Conversely, when it is inserted into low-density sludge, the resistance encountered by the sampling tube is often smaller. When When is larger, it often means that the downward resistance of the sampling tube at the i-th sampling time is greater, and it often means that the silt density at the bottom of the sampling tube at the i-th sampling time is greater. The smaller it is, the smaller the water content of the mud at the bottom of the sampling tube at the i-th sampling time is, and the greater the mud density at the bottom of the sampling tube at the i-th sampling time is. The larger it is, the greater the silt density at the bottom of the sampling tube at the i-th sampling moment.

[0077] Step S2, based on the sludge density factors at all sampling moments, estimating the sludge density index at different heights in the sampling tube during the process of pushing the sludge in the sampling tube into the sludge storage area.

[0078] The process of pushing the sludge in the sampling tube into the sludge storage area may be a process of gradually pushing the sludge in the sampling tube into the sludge storage area from the top of the sampling tube, so that the sludge in the sampling tube is gradually reduced. The method for obtaining different heights in the sampling tube may be: setting the height corresponding to the bottom of the sampling tube to 0; determining the distance between the top and the bottom of the sampling tube as the height corresponding to the top of the sampling tube; the heights of other positions in the sampling tube can be represented by the distance between the position and the bottom.

[0079] As an example, this step may include the following steps:

[0080] The first step is to sort the silt density factors at all sampling times during the silt sampling process in the sampling tube according to the sampling time from late to early, and obtain the silt density factor sequence.

[0081] During the sludge sampling process, the sampling tube can be inserted into the sludge at a constant speed.

[0082] In the second step, the height of the sampling tube is divided into a target number of scales, and the target number of scales are sorted in order from low to high to obtain a scale sequence.

[0083] The target number may be equal to the number of silt density factors in the silt density factor sequence. When the scale is closer to the bottom of the sampling tube, the serial number corresponding to the scale is smaller. The scale may represent the height of different positions in the sampling tube.

[0084] For example, if the height of the sampling tube is 5 and the target number is 6, the 6 scales obtained by equally dividing the height of the sampling tube can be: 0 scale, which is the scale corresponding to the bottom of the sampling tube; 1 scale; 2 scale; 3 scale; 4 scale; 5 scale, which is the scale corresponding to the top of the sampling tube.

[0085] The third step is to use the silt density factors in the silt density factor sequence as the silt density factors corresponding to the scales in the scale sequence.

[0086] The fourth step is to fit the scale of the sampling tube as the horizontal axis and the silt density factor corresponding to the scale as the vertical axis to obtain the silt density index at each height on the sampling tube. At this time, the distance between two adjacent heights can be the same, for example, the distance between two adjacent heights can be 1 mm.

[0087] It should be noted that, since the sampling tube is inserted into the silt at an approximately uniform speed during the silt sampling process, the silt density at the sampling moment during the silt sampling process of the sampling tube has a certain corresponding relationship with the silt density at different heights when the sampling tube is filled with silt. For example, the silt density at the top of the sampling tube when it is filled with silt is often equivalent to the silt density collected at the first sampling moment during the silt sampling process of the sampling tube; the silt density at the bottom of the sampling tube when it is filled with silt is often equivalent to the silt density collected at the last sampling moment during the silt sampling process of the sampling tube; and so on, there is often a certain relationship between different sampling moments and the silt density at different heights of the sampling tube. Therefore, the silt density index at different heights on the sampling tube in the embodiment of the present invention can be characterized as: the silt density at different heights when the sampling tube is filled with silt.

[0088] Step S3, determining the rate adjustment factor corresponding to the pushing time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge remaining height corresponding to the pushing time to be adjusted, and the average sludge particle size at the top of the sampling tube at the sludge remaining height corresponding to the pushing time to be adjusted.

[0089] The remaining sludge height corresponding to the push-in time to be adjusted may be the remaining sludge height in the sampling tube at the push-in time to be adjusted during the process of pushing the sludge in the sampling tube into the sludge storage area. The push-in time to be adjusted may be the time during the process of pushing the sludge into the sludge storage area. The method for obtaining the remaining sludge height corresponding to the push-in time to be adjusted may be: collecting the remaining sludge height corresponding to the push-in time to be adjusted through a height sensor.

[0090] As an example, this step may include the following steps:

[0091] In the first step, the residual height of the sludge corresponding to the pushing-in moment to be adjusted corresponds to the height on the sampling tube and is determined as the reference height.

[0092] For example, if the height of the sampling tube is 5, and the remaining sludge height corresponding to the time of pushing in to be adjusted is 2, the remaining sludge is between scale 3 and scale 5 of the sampling tube. The remaining sludge is equivalent to the sludge between scale 0 and scale 2 when the sampling tube is filled with sludge, that is, the remaining sludge can be regarded as the sludge between scale 0 and scale 2 when the sampling tube is filled with sludge. Then the remaining sludge height corresponding to the time of pushing in to be adjusted corresponds to the height on the sampling tube of 2, and the reference height can be scale 2 at this time. The height below the reference height can include: scale 0 and scale 1.

[0093] The second step is to determine the target silt characteristics corresponding to the time of pushing in to be adjusted based on the silt density index at the above-mentioned reference height and the height below it, and the average silt particle size at the top of the sampling tube at the silt residual height corresponding to the time of pushing in to be adjusted.

[0094] For example, the formula for determining the target sludge characteristic corresponding to the push-in time to be adjusted may be:

[0095] ;in, It is the target sludge characteristic corresponding to the push-in moment to be adjusted. is a normalized function. R is the average silt particle size at the top of the sampling tube at the silt residual height corresponding to the moment of pushing in to be adjusted. m is the number of candidate heights. The candidate height is the reference height or the height below the reference height. h is the sequence number of the candidate height. is the silt density index at the hth candidate height.

[0096] It should be noted that when R is larger, it often means that the average silt particle size at the top of the sampling tube at the silt residual height corresponding to the time of pushing in to be adjusted is larger, which often means that the silt particle size close to the filter screen at the time of pushing in to be adjusted is larger, which often means that the resistance of the filter screen to the silt is relatively larger at this time, which often means that a larger base propulsion rate or impeller rotation rate is needed to break up the silt and push it into the silt storage area. In actual situations, compared to water, silt is often relatively rough, and the larger the silt, the lower its water content and the greater its roughness. When When it is larger, it often means that the density of the silt at the hth candidate height is larger, the silt at the hth candidate height is relatively rougher, the friction between the silt at the hth candidate height and the sampling tube is greater, and it often means that a larger base propulsion rate or impeller rotation rate is required to push the silt at the hth candidate height. The larger the value, the greater the residual height of the sludge corresponding to the time of pushing in to be adjusted, and the greater the friction force at different heights of the residual sludge at the time of pushing in to be adjusted; it often means that a greater base propulsion rate or impeller rotation rate is needed to push the residual sludge. The larger it is, the greater the density of the remaining sludge is, the rougher it is, and the greater the base propulsion rate or impeller rotation rate is needed to break up the sludge and push it into the sludge storage area.

[0097] In the third step, similarly, the standard silt characteristics are determined based on the silt density index at all heights on the sampling tube and the average silt particle size at the top of the sampling tube when the sampling tube is filled with silt.

[0098] Among them, the standard sludge characteristics, that is, the target sludge characteristics corresponding to the time when the pushing time to be adjusted is equal to the starting time of the process of pushing the sludge in the sampling tube into the sludge storage area.

[0099] It should be noted that the method for obtaining the standard sludge characteristics may be the same as the method for obtaining the target sludge characteristics, which will not be described in detail here.

[0100] The fourth step is to determine the rate adjustment factor corresponding to the push-in time to be adjusted according to the above standard sludge characteristics and the target sludge characteristics corresponding to the above push-in time to be adjusted, which can include the following sub-steps:

[0101] In the first sub-step, if the target sludge characteristic is less than or equal to the standard sludge characteristic, a preset non-negative factor is determined as the rate adjustment factor corresponding to the push-in time to be adjusted.

[0102] The preset non-negative factor may be a pre-set non-negative factor. For example, the preset non-negative factor may be 1.

[0103] In the second sub-step, if the target sludge characteristic is greater than the standard sludge characteristic, the difference between the target sludge characteristic and the standard sludge characteristic is determined as the target difference, and the sum of the target difference and the preset non-negative factor is determined as the rate adjustment factor corresponding to the push-in time to be adjusted.

[0104] For example, the formula for determining the rate adjustment factor corresponding to the push-in time to be adjusted can be:

[0105] ; Wherein, D is the rate adjustment factor corresponding to the push-in moment to be adjusted. is a pre-set non-negative factor, and . is the target difference. It is the target sludge characteristic corresponding to the push-in moment to be adjusted. It is a standard silt characteristic.

[0106] It should be noted that It is equivalent to the target sludge characteristics corresponding to the beginning of the process of pushing the sludge in the sampling tube into the sludge storage area. In actual situations, the effect of pushing the sludge in the sampling tube full of sludge can often be achieved when using the preset base propulsion rate or impeller rotation rate. Therefore, when pushing the sludge in the sampling tube full of sludge at the beginning, the preset base propulsion rate and the preset impeller rotation rate can be directly used. Characterizes the propulsion rate or impeller rotation rate required for the overall sludge at the time of pushing to be adjusted Bigger than When the value is greater, it often means that the filter screen has a greater resistance to the silt, which often means that the base propulsion speed or impeller rotation speed needs to be increased. Therefore, D can represent the speed to be adjusted. The larger its value is, the more it needs to increase the base propulsion speed or impeller rotation speed.

[0107] Step S4, based on the speed adjustment factor, controlling and adjusting the base propulsion speed and the impeller rotation speed at the time of pushing in to be adjusted.

[0108] Wherein, the base propulsion rate is the propulsion rate of the base, and the impeller rotation rate is the rotation rate of the rotating impeller.

[0109] As an example, this step may include the following steps:

[0110] In the first step, if the above-mentioned rate adjustment factor is greater than the preset non-negative factor, the target base propulsion rate is determined according to the preset base propulsion rate and the above-mentioned rate adjustment factor, and the base propulsion rate at the moment of adjustment is adjusted to the target base propulsion rate.

[0111] The preset base propulsion rate may be a base propulsion rate set based on manual experience. The preset base propulsion rate and the rate adjustment factor may both be positively correlated with the target base propulsion rate.

[0112] For example, if the preset non-negative factor is set to a constant of 1, the product of the preset base propulsion rate and the rate adjustment factor can be determined as the target base propulsion rate.

[0113] For example, the formula for determining the target base propulsion rate can be:

[0114] ; Where V is the target base advancement rate. is the preset base push speed. D is the speed adjustment factor corresponding to the push-in moment to be adjusted.

[0115] It should be noted that D can represent the speed to be adjusted. The larger its value is, the more it is necessary to increase the base propulsion speed or the impeller rotation speed. Therefore, V can represent the base propulsion speed that needs to be adjusted.

[0116] In the second step, if the above-mentioned rate adjustment factor is equal to the preset non-negative factor, the base propulsion rate at the time of pushing in to be adjusted is adjusted to the preset base propulsion rate. At this time, if the base propulsion rate before adjustment at the time of pushing in to be adjusted is the preset base propulsion rate, there is no need to adjust the base propulsion rate at the time of pushing in to be adjusted.

[0117] In the third step, according to the above speed adjustment factor and the above preset non-negative factor, controlling and adjusting the impeller rotation speed at the time of pushing in to be adjusted may include the following sub-steps:

[0118] In the first sub-step, if the speed adjustment factor is greater than a preset non-negative factor, the target impeller rotation rate is determined according to the preset impeller rotation rate and the speed adjustment factor, and the impeller rotation rate at the moment of adjustment is adjusted to the target impeller rotation rate.

[0119] The preset impeller rotation rate may be a pre-set impeller rotation rate. For example, the preset impeller rotation rate may be an impeller rotation rate set based on manual experience. The preset impeller rotation rate and the speed adjustment factor may both be positively correlated with the target impeller rotation rate.

[0120] For example, the formula for determining the target impeller rotation rate can be:

[0121] ; where Q is the target impeller rotation rate. is the preset impeller rotation speed. D is the speed adjustment factor corresponding to the push-in moment to be adjusted.

[0122] It should be noted that D can represent the speed to be adjusted. The larger its value is, the more it is necessary to increase the base propulsion speed or the impeller rotation speed. Therefore, Q can represent the impeller rotation speed that needs to be adjusted.

[0123] Optionally, the formula for determining the target impeller rotation rate Q may also be:

[0124] ; where Q is the target impeller rotation rate. is the preset impeller rotation rate. V is the target base thrust rate. is the preset base advance rate.

[0125] It should be noted that, in general, the base propulsion rate and the impeller rotation rate are often adjusted synchronously. The larger the value, the higher the base propulsion speed is, and the higher the impeller rotation speed should be. Therefore, Q can represent the impeller rotation speed that needs to be adjusted.

[0126] In the second sub-step, if the above-mentioned speed adjustment factor is equal to the preset non-negative factor, the impeller rotation rate at the time of push-in to be adjusted is adjusted to the preset impeller rotation rate. At this time, if the impeller rotation rate before adjustment at the time of push-in to be adjusted is the preset impeller rotation rate, there is no need to adjust the impeller rotation rate at the time of push-in to be adjusted.

[0127] It should be noted that, through the above calculation, the base propulsion rate and impeller rotation rate that need to be adjusted can be obtained in real time, and the control instructions can be sent to the piston of the base and the rotating motor of the impeller through the relevant control system. If the propulsion rate of the base piston is increased, the output power of the base propeller should be increased, so that the base piston can be pushed upward faster in the sampling tube, so that the sludge is quickly broken up and enters the sludge storage area. At the same time, as the base propulsion rate is increased, the impeller stirring rate will also be increased synchronously, and the corresponding control instructions can be used to act on the rotating motor to increase its rotation rate to adapt to the rapid outflow of sludge. In this way, the base propulsion rate and the impeller rotation rate can be controlled in real time to adjust synchronously, so as to achieve smooth pushing up of the sludge in the sampling tube, thereby improving the efficiency of sludge treatment. Secondly, in the process of pushing the sludge into the sludge storage area, the base propulsion rate and the impeller rotation rate are respectively maintained at the preset base propulsion rate and the preset impeller rotation rate at most times. At these times, the base propulsion rate and the impeller rotation rate are often not adjusted. It is often necessary to adaptively increase the base propulsion rate and the impeller rotation rate when the sludge density at the top of the sampling tube is large.

[0128] In summary, compared with the sludge sampling and processing based on the fixed bottom propulsion rate and impeller rotation rate set by artificial experience, the present invention comprehensively considers multiple factors related to the sludge density, such as the water content of the sludge at the bottom of the sampling tube, the descending resistance of the sampling tube, the sludge density factor, the sludge density index and the average sludge particle size, etc., so as to adaptively control and adjust the base propulsion rate and the impeller rotation rate at the time of pushing in to be adjusted, thereby realizing the precise adjustment of the base propulsion rate and the impeller rotation rate, thereby reducing the possibility of clogging of the sampling tube to a certain extent, and thereby improving the subsequent sludge treatment efficiency.

[0129] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An environmentally friendly sludge sampling and processing method, characterized in that: The following steps are involved: According to the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the silt sampling process, the silt density factor at different sampling times is determined; According to the silt density factor at all sampling moments, the silt density index at different heights in the sampling tube during the process of pushing the silt in the sampling tube into the silt storage area is estimated; Determine the rate adjustment factor corresponding to the push-in time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge remaining height corresponding to the push-in time to be adjusted, and the average sludge particle size at the top of the sampling tube at the sludge remaining height corresponding to the push-in time to be adjusted, wherein the push-in time to be adjusted is the time when the sludge is pushed into the sludge storage area; Based on the speed adjustment factor, the base advancement speed and the impeller rotation speed at the time of the adjustment are controlled and adjusted, wherein the impeller rotation speed is the rotation speed of the rotating impeller; The method of determining the sludge density factor at different sampling times according to the sludge water content at the bottom of the sampling tube and the downward resistance of the sampling tube at different sampling times during the sludge sampling process of the sampling tube includes: The distance between the top of the sampling tube and the surface of the area to be sampled at different sampling times during the sludge sampling process of the sampling tube is determined as the reference distance at different sampling times, wherein the area to be sampled is the sludge area where the sludge is sampled by the sampling tube; According to the reference distance at each sampling moment, the water content of the silt at the bottom of the sampling tube and the downward resistance of the sampling tube, the silt density factor at each sampling moment is determined; The method of determining the silt density factor at each sampling moment according to the reference distance at each sampling moment, the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube comprises: The ratio of the reference distance at each sampling moment to the height value of the sampling tube obtained in advance is determined as the target distance factor at each sampling moment; Based on the target distance factor at each sampling moment, the silt insertion depth at each sampling moment is determined, wherein the target distance factor is negatively correlated with the silt insertion depth, and the silt insertion depth represents the depth of the bottom of the sampling tube inserted into the silt; According to the silt insertion depth, the silt water content at the bottom of the sampling tube and the downward resistance of the sampling tube at each sampling time, the silt density factor at each sampling time is determined, wherein the silt insertion depth and the downward resistance of the sampling tube are both positively correlated with the silt density factor, and the silt water content at the bottom of the sampling tube is negatively correlated with the silt density factor. The silt density factor at the sampling time represents the silt density at the bottom of the sampling tube at the sampling time; The formula corresponding to the silt density factor at the sampling time is: ； ;in, is the silt density factor at the i-th sampling time in the silt sampling process of the sampling tube; i is the sequence number of the sampling time in the silt sampling process of the sampling tube; is the normalization function; is the sludge insertion depth at the i-th sampling moment during the sludge sampling process of the sampling tube; is the downward resistance of the sampling tube at the i-th sampling moment during the sludge sampling process; is a natural exponential function; is the water content of the sludge at the bottom of the sampling tube at the i-th sampling time during the sludge sampling process; is the reference distance at the i-th sampling moment during the sludge sampling process of the sampling tube; H is the height value of the sampling tube; is the target distance factor at the i-th sampling moment during the sludge sampling process in the sampling tube; The silt density factors at all sampling moments are used to estimate the silt density indexes at different heights in the sampling tube during the process of pushing the silt in the sampling tube into the silt storage area, including: According to the sampling time from late to early, the silt density factors at all sampling times in the silt sampling process of the sampling tube are sorted to obtain a silt density factor sequence, wherein the sampling tube is inserted into the silt at a uniform speed in the silt sampling process of the sampling tube; Divide the height of the sampling tube into a target number of scales, and sort the target number of scales in order from low to high to obtain a scale sequence, wherein the target number is equal to the number of silt density factors in the silt density factor sequence; The silt density factors in the silt density factor sequence are sequentially used as the silt density factors corresponding to the scales in the scale sequence; The scale of the sampling tube is used as the horizontal coordinate, and the silt density factor corresponding to the scale is used as the vertical coordinate for fitting to obtain the silt density index at each height on the sampling tube; The method of determining the rate adjustment factor corresponding to the push-in time to be adjusted according to the sludge density index at the height on the sampling tube corresponding to the sludge remaining height corresponding to the push-in time to be adjusted, and the average sludge particle size at the top of the sampling tube at the sludge remaining height corresponding to the push-in time to be adjusted, comprises: The remaining height of the sludge corresponding to the moment of pushing in to be adjusted corresponds to the height on the sampling tube, and is determined as the reference height; Determine the target sludge characteristics corresponding to the push-in time to be adjusted according to the sludge density index at the reference height and the height below it, and the average sludge particle size at the top of the sampling tube at the sludge residual height corresponding to the push-in time to be adjusted; Similarly, the standard silt characteristics are determined based on the silt density index at all heights on the sampling tube and the average silt particle size at the top of the sampling tube when the sampling tube is filled with silt; Determining a rate adjustment factor corresponding to the push-in time to be adjusted according to the standard sludge characteristics and the target sludge characteristics corresponding to the push-in time to be adjusted; The formula corresponding to the target sludge characteristics corresponding to the push-in time to be adjusted is: ;in, is the target sludge characteristic corresponding to the push-in time to be adjusted; is a normalized function; R is the average silt particle size at the top of the sampling tube at the silt residual height corresponding to the moment of pushing to be adjusted; m is the number of candidate heights; the candidate height is the reference height or the height below the reference height; h is the sequence number of the candidate height; is the silt density index at the hth candidate height; The determining of the rate adjustment factor corresponding to the push-in time to be adjusted according to the standard sludge characteristics and the target sludge characteristics corresponding to the push-in time to be adjusted comprises: If the target sludge characteristic is less than or equal to the standard sludge characteristic, a preset non-negative factor is determined as the rate adjustment factor corresponding to the push-in time to be adjusted, wherein the preset non-negative factor is 1; If the target sludge characteristic is greater than the standard sludge characteristic, the difference between the target sludge characteristic and the standard sludge characteristic is determined as the target difference, and the sum of the target difference and the preset non-negative factor is determined as the rate adjustment factor corresponding to the push-in time to be adjusted.

2. An environmentally friendly sludge sampling and processing method according to claim 1, characterized in that: The control and adjustment of the base propulsion rate and the impeller rotation rate at the moment of pushing in to be adjusted based on the rate adjustment factor includes: If the speed adjustment factor is greater than the preset non-negative factor, the target base propulsion speed is determined according to the preset base propulsion speed and the speed adjustment factor, and the base propulsion speed at the time of the push-in to be adjusted is adjusted to the target base propulsion speed, wherein the preset base propulsion speed and the speed adjustment factor are both positively correlated with the target base propulsion speed; If the speed adjustment factor is equal to the preset non-negative factor, the base advancement speed at the time of the push-in to be adjusted is adjusted to the preset base advancement speed; The impeller rotation speed at the push-in moment to be adjusted is controlled and adjusted according to the speed adjustment factor and the preset non-negative factor.

3. An environmentally friendly sludge sampling and processing method according to claim 2, characterized in that: The controlling and adjusting the impeller rotation speed at the push-in moment to be adjusted according to the speed adjustment factor and the preset non-negative factor includes: If the speed adjustment factor is greater than the preset non-negative factor, a target impeller rotation speed is determined according to the preset impeller rotation speed and the speed adjustment factor, and the impeller rotation speed at the time of the push-in adjustment is adjusted to the target impeller rotation speed, wherein the preset impeller rotation speed and the speed adjustment factor are both positively correlated with the target impeller rotation speed; If the speed adjustment factor is equal to the preset non-negative factor, the impeller rotation speed at the time of push-in to be adjusted is adjusted to the preset impeller rotation speed.

4. An environmentally friendly sludge sampling and processing equipment, characterized in that: It comprises a data processor, and the data processor is used to implement an environmentally friendly sludge sampling and processing method according to any one of claims 1-3.

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