A high-efficiency sludge concentration treatment method and system

Abstract

The present application relates to the field of sludge treatment, and specifically provides a highly efficient sludge thickening treatment method and system, including: using the first moisture content at the slag outlet position at the current speed to determine the separation capacity of the sample sludge at the current speed; using the second moisture content at different positions in the drum at the current speed to determine the correction factor of the separation capacity of the sample sludge at the current speed; correcting the separation capacity based on the correction factor to obtain the reference separation capacity corresponding to the current speed, and determining the final speed corresponding to the sample sludge based on the reference separation capacity corresponding to all speeds; and using the final speed to concentrate the sludge to be concentrated. The method of the present application obtains the separation capacity of the sludge at different speeds by analyzing, and corrects the separation capacity in combination with the uniformity of the sludge at different positions in the drum and the difference from the initial sludge moisture content, and obtains the optimal speed according to the corrected sludge separation capacity, thereby improving the concentration efficiency.

Description

Technical Field

[0001] The present application relates to the field of sludge treatment, and in particular to a high-efficiency sludge concentration treatment method and system. Background Art

[0002] Sludge refers to water-containing solid waste generated in wastewater treatment, sewage treatment, industrial production and other environmental engineering processes, usually containing a large amount of water. The main purpose of sludge concentration is to reduce its volume and moisture content, so as to facilitate subsequent treatment and disposal. And the concentrated sludge has a higher solid content, making the subsequent treatment process more efficient. For example, in the process of sludge dewatering, a higher solid content can reduce the energy consumption and processing time of the dewatering equipment and reduce the processing cost. Therefore, it is very important to concentrate the sludge.

[0003] Using centrifugal sedimentation to concentrate sludge is a common concentration method. The traditional speed is determined according to the particle size of the sludge and the radius of the centrifuge. However, in the actual dewatering centrifugal process, the speed obtained by theory is not necessarily the optimal speed due to many factors such as the concentration and viscosity of the sludge. A low speed leads to low efficiency of sludge concentration treatment, while a high speed cannot significantly improve the sludge concentration efficiency and will significantly increase energy consumption. In addition, a high speed will cause the sludge to be broken up, seriously affecting the concentration efficiency. Summary of the invention

[0004] In order to solve the above problems, the present application provides a high-efficiency sludge thickening treatment method and system, which can obtain an optimal rotation speed suitable for the sludge to be thickened, and perform thickening according to the optimal rotation speed, thereby improving the thickening efficiency.

[0005] In a first aspect, the present application provides a highly efficient sludge concentration treatment method, comprising:

[0006] Collecting part of the sludge to be concentrated as sample sludge, concentrating the sample sludge at different rotation speeds, and collecting a first moisture content at a slag outlet and a second moisture content at different positions in the drum of the sample sludge at the same rotation speed;

[0007] The separation capacity of the sample sludge at the current rotation speed is determined by using the first moisture content at the slag outlet position at the current rotation speed;

[0008] The correction factor of the separation capacity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed;

[0009] The separation capacity is corrected based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, and a final rotation speed corresponding to the sample sludge is determined based on the reference separation capacity corresponding to all rotation speeds;

[0010] The sludge to be concentrated is concentrated by utilizing the final rotation speed.

[0011] In one embodiment, the separation capacity of the sample sludge at the current rotation speed is determined by using the first moisture content at the slag outlet position at the current rotation speed, including:

[0012] Determine the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current rotation speed based on the first moisture content at the slag outlet position at the current rotation speed;

[0013] Determine the time it takes for the sample sludge to reach concentration equilibrium at the current rotation speed;

[0014] The separation capacity of the sample sludge at the current rotation speed is determined based on the first equilibrium moisture content at the slag outlet position when the sample sludge reaches the concentration equilibrium at the current rotation speed and the time consumed when the sample sludge reaches the concentration equilibrium at the current rotation speed.

[0015] In one embodiment, determining the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current rotation speed based on the first moisture content at the slag outlet position at the current rotation speed includes:

[0016] Record the first moisture content at the slag outlet position at the current rotation speed to obtain a first moisture content sequence;

[0017] Calculate the difference between two adjacent first moisture contents in the first moisture content sequence to obtain a moisture content difference sequence;

[0018] If the absolute values ​​of all differences after the kth difference in the moisture content difference sequence are less than a preset value, then the first moisture content corresponding to the kth difference is determined to be the first equilibrium moisture content at the slag outlet when the sample sludge reaches concentration equilibrium at the current rotation speed;

[0019] Determine the time it takes for the sample sludge to reach concentrated equilibrium at the current rotation speed, including:

[0020] The collection time of the first moisture content corresponding to the kth difference value is determined as the time consumed when the sample sludge reaches concentration equilibrium at the current rotation speed.

[0021] In one embodiment, the separation capacity of the sample sludge at the current rotation speed is determined based on the first equilibrium moisture content at the slag outlet position when the concentration equilibrium is reached and the time consumed when the sample sludge reaches the concentration equilibrium, including:

[0022] The following formula is used to determine the separation capacity of the sample sludge at the current rotation speed:

[0023] ;

[0024] in, It indicates the separation capacity of sample sludge at the rotation speed r, It indicates the first equilibrium moisture content at the slag outlet when the sample sludge reaches the concentration equilibrium at the rotation speed r. It represents the time consumed when the sample sludge reaches the concentration equilibrium at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0025] In one embodiment, the correction factor of the separation capacity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed, including:

[0026] The dehydration uniformity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed;

[0027] The second moisture content at different positions in the drum at the current rotation speed is used to determine the average time and average moisture content consumed when the sample sludge reaches concentration equilibrium at different positions in the drum at the current rotation speed;

[0028] A correction factor for the separation capacity of the sample sludge at the current rotation speed is determined based on the average time, the average moisture content, the initial moisture content of the sample sludge, and the dehydration uniformity of the sample sludge at the current rotation speed.

[0029] In one embodiment, the second moisture content at different positions in the drum at the current rotation speed is used to determine the dehydration uniformity of the sample sludge at the current rotation speed, including:

[0030] Determine the separation capacity of the sample sludge at different positions of the drum at the current rotation speed based on the second moisture content at different positions in the drum at the current rotation speed;

[0031] The time consumed for the sample sludge to reach concentration equilibrium at different positions in the drum at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed;

[0032] Based on the difference in separation capacity of the sample sludge at different positions of the drum at the current rotation speed, the difference in time consumed for the sample sludge to reach concentration equilibrium at different positions in the drum at the current rotation speed, and the number of positions in the drum where the second moisture content is detected, the average difference between the separation capacity of the sample sludge at each position of the drum at the current rotation speed and the separation capacity of the remaining positions is determined, and the average difference represents the dehydration uniformity of the sample sludge at the current rotation speed.

[0033] In one embodiment, the following formula is used to determine the average difference between the separation capacity of each position of the drum and the separation capacity of the remaining positions of the sample sludge at the current rotation speed:

[0034] ;

[0035] in, Indicates the dehydration uniformity of the sample sludge at the rotation speed r, Indicates the number of locations in the drum where the second moisture content is detected. It indicates the separation capacity at position i in the drum at speed r, It indicates the separation capacity at position j in the drum at speed r. It indicates the time it takes for position i in the drum to reach concentration equilibrium at speed r. It indicates the time taken for position j in the drum to reach concentration equilibrium at rotation speed r.

[0036] In one embodiment, the correction factor of the separation capacity of the sample sludge at the current rotation speed is determined using the following formula:

[0037] ;

[0038] in, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, represents the initial moisture content of the sample sludge, It indicates the average moisture content of the sample sludge at different positions in the drum when it reaches concentration equilibrium at the rotation speed r. It represents the average time consumed by the sample sludge to reach concentration equilibrium at different positions in the drum at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0039] In one embodiment, the separation capacity is corrected based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, which includes:

[0040] The reference separation capacity corresponding to the current speed is obtained using the following formula:

[0041] ;

[0042] in, It represents the reference separation capacity corresponding to the rotation speed r, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, It indicates the separation capacity of sample sludge at the rotation speed r;

[0043] Determining a final rotation speed corresponding to the sample sludge based on the reference separation capacity corresponding to all rotation speeds includes:

[0044] The rotation speed with the maximum reference separation capacity is determined as the final rotation speed corresponding to the sample sludge.

[0045] In a second aspect, the present application provides a high-efficiency sludge concentration treatment system, comprising:

[0046] A data acquisition module is used to collect part of the sludge to be concentrated as sample sludge, concentrate the sample sludge at different rotation speeds, and collect a first moisture content at a slag outlet and a second moisture content at different positions in the drum of the sample sludge at the same rotation speed;

[0047] A first calculation module is used to determine the separation capacity of the sample sludge at the current rotation speed by using the first moisture content at the slag outlet position at the current rotation speed;

[0048] A second calculation module is used to determine a correction factor of the separation capacity of the sample sludge at the current rotation speed by using the second moisture content at different positions in the drum at the current rotation speed;

[0049] A rotation speed determination module, used to correct the separation capacity based on the correction factor, so as to obtain a reference separation capacity corresponding to the current rotation speed, and determine a final rotation speed corresponding to the sample sludge based on the reference separation capacities corresponding to all rotation speeds;

[0050] The concentration processing module is used to perform concentration processing on the sludge to be concentrated by utilizing the final rotation speed.

[0051] The highly efficient sludge thickening treatment method of the present application uses the first moisture content at the slag outlet position at the current speed to determine the separation capacity of the sample sludge at the current speed; uses the second moisture content at different positions in the drum at the current speed to determine the correction factor of the separation capacity of the sample sludge at the current speed; corrects the separation capacity based on the correction factor to obtain the reference separation capacity corresponding to the current speed, and determines the final speed corresponding to the sample sludge based on the reference separation capacity corresponding to all speeds; and uses the final speed to concentrate the sludge to be concentrated. The method of the present application first obtains the separation capacity of the sludge at different speeds by analysis, corrects the separation capacity based on the uniformity of the sludge at different positions in the drum and the difference from the initial sludge moisture content, obtains the optimal speed based on the corrected sludge separation capacity, and improves the thickening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0053] Figure 1 This is a schematic flow chart of a first embodiment of a highly efficient sludge thickening treatment method of the present invention.

[0054] Figure 2 for Figure 1Schematic diagram of a flow chart of an embodiment of step S12 in FIG.

[0055] Figure 3 for Figure 1 Schematic diagram of a flow chart of an embodiment of step S13 in FIG.

[0056] Figure 4 It is a structural schematic diagram of an embodiment of a high-efficiency sludge thickening treatment system of the present invention. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] See also Figure 1 , which is a schematic flow chart of a first embodiment of a highly efficient sludge thickening treatment method of the present invention, specifically comprising:

[0059] Step S11: collecting part of the sludge to be concentrated as sample sludge, concentrating the sample sludge at different rotation speeds, and collecting the first moisture content of the sample sludge at the slag outlet and the second moisture content at different positions in the drum at the same rotation speed.

[0060] A small amount of sludge is collected from the sludge to be concentrated as sample sludge, and the centrifugal dehydrator uses different speeds to concentrate the sample sludge. The sludge at the centrifuge outlet represents the concentrated sludge, so it is necessary to collect the first moisture content of the sample sludge at the outlet at the same speed.

[0061] Since the centrifugal dehydrator uses the centrifugal force generated by high-speed rotation to achieve solid-liquid separation, when the moisture content of the sludge in the drum is evenly distributed, it means that the sludge in the entire drum is subjected to a similar degree of centrifugal force, thereby achieving a uniform dehydration effect. In order to determine whether a uniform dehydration effect is achieved, the second moisture content of the sample sludge at different positions in the drum is required as a reference, so it is necessary to collect the second moisture content of the sample sludge at different positions in the drum at the same rotation speed.

[0062] It should be noted that the first moisture content at the slag outlet and the second moisture content at different positions in the drum need to be collected at the same time. For example, the first moisture content at the slag outlet and the second moisture content at different positions in the drum at the same rotation speed of the sample sludge can be collected every 30 seconds or every minute.

[0063] Step S12: Determine the separation capacity of the sample sludge at the current rotation speed by using the first moisture content at the slag outlet position at the current rotation speed.

[0064] In traditional methods, when sludge is concentrated, the theoretical optimal speed of the centrifuge is determined based on the sludge particle size and the radius of the centrifuge. The actual centrifugation process will be affected by the sludge viscosity and concentration as well as the centrifuge equipment itself, which will cause the theoretical optimal speed to be inaccurate and affect the concentration efficiency.

[0065] The present application utilizes the first moisture content at the slag outlet position at the current rotation speed to determine the separation capacity of the sample sludge at the current rotation speed, thereby obtaining the corresponding separation capacity of the sample sludge at different rotation speeds.

[0066] In one embodiment, please combine Figure 2 ,for Figure 1 A flow chart of an embodiment of step S12 in FIG. 1 ; step S12 specifically includes:

[0067] Step S21: determining the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current rotation speed based on the first moisture content at the slag outlet position at the current rotation speed.

[0068] When the first moisture content of the sludge at the slag outlet no longer changes in the following time, it is considered that the concentration equilibrium is reached. Therefore, the first moisture content at the slag outlet position at the current speed is recorded to obtain a first moisture content sequence. For example, the first moisture content at the slag outlet position at the current speed is recorded once every 30 seconds or every minute to obtain the first moisture content sequence. The difference between two adjacent first moisture contents in the first moisture content sequence is calculated to obtain a moisture content difference sequence; if the absolute values ​​of all differences after the kth difference in the moisture content difference sequence are less than a preset value, the first moisture content corresponding to the kth difference is determined to be the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current speed. For example, the difference between the first moisture contents before and after the first moisture content sequence is recorded. Get the moisture content difference sequence. If the k-1th difference in the moisture content difference sequence does not satisfy , starting from the kth difference, all subsequent differences satisfy , it is considered that the concentration equilibrium is reached at this time, and the first moisture content corresponding to the kth difference is It is the first equilibrium moisture content at the slag outlet when the sample sludge reaches concentration equilibrium at the current rotation speed.

[0069] Step S22: Determine the time consumed for the sample sludge to reach concentration equilibrium at the current rotation speed.

[0070] As described in the above step S21, the collection time of the first moisture content corresponding to the kth difference value is determined as the time consumed when the sample sludge reaches concentration equilibrium at the current rotation speed.

[0071] Step S23: determining the separation capacity of the sample sludge at the current rotation speed based on the first equilibrium moisture content at the slag outlet position when the sample sludge reaches the concentration equilibrium at the current rotation speed and the time consumed when the sample sludge reaches the concentration equilibrium at the current rotation speed.

[0072] Since the concentration efficiency of sludge is mainly reflected by the water content of sludge and the concentration time, the lower the water content and the shorter the concentration time, the higher the concentration efficiency of sludge, indicating that the separation ability of sludge is stronger at the rotation speed. Based on this, the following formula is used to determine the separation ability of sample sludge at the current rotation speed:

[0073] ; Formula (1)

[0074] in, It indicates the separation capacity of sample sludge at the rotation speed r, It indicates the first equilibrium moisture content at the slag outlet when the sample sludge reaches the concentration equilibrium at the rotation speed r. It represents the time consumed when the sample sludge reaches the concentration equilibrium at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0075] In the above formula, the first equilibrium moisture content at the slag outlet when the sample sludge reaches concentration equilibrium at the rotation speed r is The smaller the value, the time it takes for the sample sludge to reach concentration equilibrium at the rotation speed r. The shorter it is, the higher the separation capacity of the sample sludge at the rotation speed r.

[0076] The above steps are used to determine the separation capacity of the sample sludge at different rotation speeds.

[0077] Step S13: using the second moisture content at different positions in the drum at the current rotation speed, determining a correction factor of the separation capacity of the sample sludge at the current rotation speed.

[0078] The higher the speed, the greater the centrifugal force, which allows the water and solids in the sludge to separate quickly, allowing more solid particles to be concentrated on the centrifuge drum quickly, which can effectively shorten the sludge concentration time and increase the concentration efficiency, resulting in a stronger separation capacity. However, the higher the speed, the better. When the sludge moisture content at the slag outlet is already low, increasing the speed after exceeding the optimal speed will not significantly improve the sludge separation capacity, but will increase energy consumption. In addition, due to the influence of the sludge discharged when equilibrium is not reached, the moisture content obtained cannot accurately reflect the sludge concentration efficiency, resulting in the inaccurate separation capacity calculated by the above formula (1). Therefore, the separation capacity needs to be corrected, that is, the correction factor for calculating the separation capacity of the sample sludge at the current speed. For details, please combine Figure 3 ,for Figure 1 The flowchart of an embodiment of step S13 in step S13 specifically includes:

[0079] Step S31: Determine the dehydration uniformity of the sample sludge at the current rotation speed by using the second moisture content at different positions in the drum at the current rotation speed.

[0080] Since the centrifugal dewatering machine uses the centrifugal force generated by high-speed rotation to achieve solid-liquid separation. When the moisture content of the sludge in the drum is evenly distributed, it means that the sludge in the entire drum is subjected to a similar degree of centrifugal force, thereby achieving a uniform dehydration effect. This uniformity usually means that the rotation speed has reached an optimal level, allowing the centrifugal force to effectively penetrate the inside of the drum and dehydrate all sludge particles; on the contrary, if the moisture content of the sludge in the drum is too high or too low, it means that only a small amount of sludge is concentrated, and most of the sludge in the sample is discharged from the slag outlet without being concentrated. Therefore, it is necessary to determine the dehydration uniformity of the sample sludge at the current rotation speed.

[0081] In one embodiment, the separation capacity of the sample sludge at different positions of the drum at the current speed is determined based on the second moisture content at different positions in the drum at the current speed. The time consumed by the sample sludge at different positions in the drum at the current speed to reach concentration equilibrium is determined using the second moisture content at different positions in the drum at the current speed. Based on the difference in separation capacity of the sample sludge at different positions of the drum at the current speed, the difference in time consumed by the sample sludge at different positions in the drum at the current speed to reach concentration equilibrium, and the number of positions in the drum where the second moisture content is detected, the average difference between the separation capacity of each position of the drum at the current speed and the separation capacity of the remaining positions is determined, and the average difference represents the dehydration uniformity of the sample sludge at the current speed.

[0082] Specifically, the second equilibrium moisture content at different positions in the drum when the sample sludge reaches the concentration equilibrium at the rotation speed r can be determined. The second equilibrium moisture content is determined in the same way as the first equilibrium moisture content. The time consumed by the sample sludge at different positions in the drum to reach the concentration equilibrium at the rotation speed r is then determined. The above formula (1) is further used to calculate the separation capacity of the sample sludge at different positions of the drum at the current rotation speed.

[0083] Furthermore, the following formula is used to determine the average difference between the separation capacity of each position of the drum and the separation capacity of the remaining positions at the current rotation speed of the sample sludge:

[0084] ;

[0085] in, Indicates the dehydration uniformity of the sample sludge at the rotation speed r, Indicates the number of locations in the drum where the second moisture content is detected. It indicates the separation capacity at position i in the drum at speed r, It indicates the separation capacity at position j in the drum at speed r. It indicates the time it takes for position i in the drum to reach concentration equilibrium at speed r. It indicates the time taken for position j in the drum to reach concentration equilibrium at rotation speed r. It indicates the difference in separation capacity between position i and position j in the drum at speed r. It indicates the difference in time taken for position i and position j in the drum to reach concentration equilibrium at rotation speed r.

[0086] is the average difference between the separation capacity of each position of the drum and the separation capacity of the remaining positions at the current rotation speed of the sample sludge, which characterizes the dehydration uniformity of the sample sludge at the rotation speed r. The average difference is calculated The smaller the value, the higher the dehydration uniformity of the sample sludge at the rotation speed r. On the contrary, the calculated average difference The larger the value is, the lower the dehydration uniformity of the sample sludge at the rotation speed r.

[0087] Step S32: using the second moisture content at different positions in the drum at the current rotation speed, determine the average time and average moisture content consumed when the sample sludge at different positions in the drum at the current rotation speed reaches concentration equilibrium.

[0088] Specifically, the second equilibrium moisture content at different positions in the drum when the sample sludge reaches concentration equilibrium at the rotation speed r can be determined, and the average moisture content at different positions in the drum when the sample sludge reaches concentration equilibrium at the current rotation speed can be calculated using the second equilibrium moisture content corresponding to all positions. Further, the time consumed by the sample sludge at different positions in the drum to reach the concentration equilibrium at the rotation speed r is determined, and the time consumed by all positions in the drum to reach the concentration equilibrium at the rotation speed r is used to determine the average time consumed by the sample sludge at different positions in the drum to reach the concentration equilibrium at the current rotation speed. .

[0089] Step S33: determining a correction factor of the separation capacity of the sample sludge at the current rotation speed based on the average time, the average moisture content, the initial moisture content of the sample sludge and the dehydration uniformity of the sample sludge at the current rotation speed.

[0090] The correction factor for the separation capacity of the sample sludge at the current rotation speed is determined using the following formula:

[0091] ;

[0092] in, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, represents the initial moisture content of the sample sludge, It indicates the average moisture content of the sample sludge at different positions in the drum when it reaches concentration equilibrium at the rotation speed r. It represents the average time consumed by the sample sludge to reach concentration equilibrium at different positions in the drum at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0093] Too high a speed can shorten the separation time of the sludge, resulting in a shorter time to reach equilibrium and smaller differences in the drum. However, too high a speed can cause the flocculated sludge to be broken up, affecting the sludge concentration and thus the efficiency. Therefore, it is necessary to use the initial moisture content of the sludge and the average moisture content when reaching equilibrium to correct the separation capacity. Therefore, in the above formula, the initial moisture content of the sample sludge is calculated as The average moisture content of the sample sludge at different positions in the drum when it reaches concentration equilibrium at the rotation speed r The difference . It indicates the difference between the initial moisture content of the sludge and the average moisture content at each position in the drum when the concentration equilibrium is reached. This difference reflects the dehydration capacity of the sludge. The greater the difference, the stronger the dehydration capacity of the sludge and the shorter the time to reach the concentration equilibrium, which means that the sludge is separated faster and the efficiency is higher. This indicates that the water and solids in the sludge can be better separated at this speed, thereby increasing the current separation capacity.

[0094] Step S14: the separation capacity is corrected based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, and a final rotation speed corresponding to the sample sludge is determined based on the reference separation capacities corresponding to all rotation speeds.

[0095] In one embodiment, the reference separation capacity corresponding to the current rotation speed is obtained using the following formula:

[0096] ;

[0097] in, It represents the reference separation capacity corresponding to the rotation speed r, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, It indicates the separation capacity of sample sludge at the rotation speed r.

[0098] In the same way, the reference separation capacity corresponding to each rotation speed can be obtained, and the final rotation speed corresponding to the sample sludge can be determined based on the reference separation capacity corresponding to all rotation speeds.

[0099] Specifically, a coordinate system is drawn with the rotation speed as the abscissa and the reference separation capacity as the ordinate to obtain a rotation speed-reference separation capacity curve, and the rotation speed with the maximum reference separation capacity is determined as the final rotation speed corresponding to the sample sludge.

[0100] Step S15: using the final rotation speed to concentrate the sludge to be concentrated.

[0101] The final rotation speed of the sample sludge can be obtained through the above steps. Since the amount of the sludge to be concentrated is relatively large and has the same type and physical properties as the sample sludge, the final rotation speed can be used to concentrate the sludge to be concentrated.

[0102] It can be understood that the final rotation speed of the sample sludge can also be applied to the concentration process of other sludges, as long as the other sludges are of the same type and physical properties as the sample sludge.

[0103] Since the optimal speed determined by the size of the sludge particles does not take into account other factors of the sludge and the machine, there is a significant difference between the theoretical speed obtained and its actual optimal speed, and the inaccuracy of the speed will affect the sludge concentration efficiency. Therefore, it is necessary to obtain a suitable speed parameter in combination with the concentration effect of the actual process sample sludge, and use this speed to concentrate all the sludge, so as to improve the efficiency of the sludge. Based on this, the method of the present application first obtains the separation capacity of the sludge at different speeds by analyzing, and corrects the separation capacity in combination with the uniformity of the sludge at different positions in the drum and the difference from the initial sludge water content, and obtains the optimal speed according to the corrected sludge separation capacity. It avoids the situation that although the concentrated sludge has a strong separation capacity, the separation process can only achieve solid-liquid separation for a very small amount of sludge; on the other hand, considering the problem that the concentration time of the sludge is shortened when the speed is too large, but the sludge is broken up, resulting in low concentration efficiency, the separation capacity is corrected, and the optimal separator speed suitable for the sludge is obtained, thereby improving the concentration efficiency.

[0104] See also Figure 4 , Figure 4 It is a structural schematic diagram of an embodiment of a high-efficiency sludge thickening treatment system of the present invention, which specifically includes: a data acquisition module 51, a first calculation module 52, a second calculation module 53, a rotation speed determination module 54 and a thickening treatment module 55.

[0105] The data acquisition module 51 is used to collect part of the sludge to be concentrated as sample sludge, concentrate the sample sludge at different rotation speeds, and collect the first moisture content of the sample sludge at the slag outlet and the second moisture content at different positions in the drum at the same rotation speed.

[0106] The data collection module 51 is used to collect a small amount of sludge from the sludge to be concentrated as sample sludge. The centrifugal dehydrator uses different speeds to concentrate the sample sludge. The sludge at the centrifuge outlet represents the concentrated sludge, so it is necessary to collect the first moisture content of the sample sludge at the outlet at the same speed.

[0107] Since the centrifugal dehydrator uses the centrifugal force generated by high-speed rotation to achieve solid-liquid separation, when the moisture content of the sludge in the drum is evenly distributed, it means that the sludge in the entire drum is subjected to a similar degree of centrifugal force, thereby achieving a uniform dehydration effect. In order to determine whether a uniform dehydration effect is achieved, the second moisture content of the sample sludge at different positions in the drum is required as a reference, so it is necessary to collect the second moisture content of the sample sludge at different positions in the drum at the same rotation speed.

[0108] It should be noted that the first moisture content at the slag outlet and the second moisture content at different positions in the drum need to be collected at the same time. For example, the first moisture content at the slag outlet and the second moisture content at different positions in the drum at the same rotation speed of the sample sludge can be collected every 30 seconds or every minute.

[0109] The first calculation module 52 is used to determine the separation capacity of the sample sludge at the current rotation speed by using the first moisture content at the slag outlet position at the current rotation speed.

[0110] The first calculation module 52 is used to determine the first equilibrium moisture content at the slag outlet position when the sample sludge reaches the concentration equilibrium at the current speed based on the first moisture content at the slag outlet position at the current speed; determine the time consumed by the sample sludge to reach the concentration equilibrium at the current speed; and determine the separation capacity of the sample sludge at the current speed based on the first equilibrium moisture content at the slag outlet position when the sample sludge reaches the concentration equilibrium at the current speed and the time consumed by the sample sludge to reach the concentration equilibrium at the current speed.

[0111] In one embodiment, the first calculation module 52 is used to record the first moisture content at the slag outlet position at the current speed to obtain a first moisture content sequence; calculate the difference between two adjacent first moisture contents in the first moisture content sequence to obtain a moisture content difference sequence; if the absolute values ​​of all differences after the kth difference in the moisture content difference sequence are less than a preset value, then the first moisture content corresponding to the kth difference is determined to be the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current speed; and the collection time of the first moisture content corresponding to the kth difference is determined to be the time consumed for the sample sludge to reach concentration equilibrium at the current speed.

[0112] In one embodiment, the first calculation module 52 is used to determine the separation capacity of the sample sludge at the current rotation speed using the following formula:

[0113] ;

[0114] in, It indicates the separation capacity of sample sludge at the rotation speed r, It indicates the first equilibrium moisture content at the slag outlet when the sample sludge reaches the concentration equilibrium at the rotation speed r. It represents the time consumed when the sample sludge reaches the concentration equilibrium at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0115] The second calculation module 53 is used to determine the correction factor of the separation ability of the sample sludge at the current rotation speed by using the second moisture content at different positions in the drum at the current rotation speed.

[0116] In one embodiment, the second calculation module 53 is used to determine the dehydration uniformity of the sample sludge at the current speed by using the second moisture content at different positions in the drum at the current speed; determine the average time and average moisture content consumed by the sample sludge at different positions in the drum at the current speed to reach concentration equilibrium; and determine the correction factor of the separation capacity of the sample sludge at the current speed based on the average time, the average moisture content, the initial moisture content of the sample sludge and the dehydration uniformity of the sample sludge at the current speed.

[0117] In one embodiment, the second calculation module 53 is used to determine the separation capacity of the sample sludge at different positions of the drum at the current speed based on the second moisture content at different positions in the drum at the current speed; determine the time consumed by the sample sludge at different positions in the drum at the current speed to reach concentrated equilibrium; based on the difference in separation capacity of the sample sludge at different positions of the drum at the current speed, the difference in time consumed by the sample sludge at different positions in the drum at the current speed to reach concentrated equilibrium, and the number of positions in the drum where the second moisture content is detected, determine the average difference between the separation capacity of the sample sludge at each position of the drum at the current speed and the separation capacity of the remaining positions, the average difference characterizing the dehydration uniformity of the sample sludge at the current speed.

[0118] In one embodiment, the second calculation module 53 is used to determine the average difference between the separation capacity of each position of the drum and the separation capacity of the remaining positions of the sample sludge at the current rotation speed using the following formula:

[0119] ;

[0120] in, Indicates the dehydration uniformity of the sample sludge at the rotation speed r, Indicates the number of locations in the drum where the second moisture content is detected. It indicates the separation capacity at position i in the drum at speed r, It indicates the separation capacity at position j in the drum at speed r. It indicates the time it takes for position i in the drum to reach concentration equilibrium at speed r. It indicates the time taken for position j in the drum to reach concentration equilibrium at rotation speed r.

[0121] In one embodiment, the second calculation module 53 is used to determine the correction factor of the separation capacity of the sample sludge at the current rotation speed using the following formula:

[0122] ;

[0123] in, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, represents the initial moisture content of the sample sludge, It indicates the average moisture content of the sample sludge at different positions in the drum when it reaches concentration equilibrium at the rotation speed r. It represents the average time consumed by the sample sludge to reach concentration equilibrium at different positions in the drum at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

[0124] The rotation speed determination module 54 is used to correct the separation capacity based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, and determine a final rotation speed corresponding to the sample sludge based on the reference separation capacities corresponding to all rotation speeds.

[0125] In one embodiment, the speed determination module 54 is used to obtain the reference separation capacity corresponding to the current speed using the following formula:

[0126] ;

[0127] in, It represents the reference separation capacity corresponding to the rotation speed r, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, It indicates the separation capacity of sample sludge at the rotation speed r.

[0128] In one embodiment, the rotation speed determination module 54 is used to determine the rotation speed with the maximum reference separation capacity as the final rotation speed corresponding to the sample sludge.

[0129] The concentration processing module 55 is used to perform concentration processing on the sludge to be concentrated by utilizing the final rotation speed.

[0130] Since the optimal speed determined by the size of the sludge particles does not take into account other factors of the sludge and the machine, there is a significant difference between the theoretical speed obtained and its actual optimal speed, and the inaccuracy of the speed will affect the sludge concentration efficiency. Therefore, it is necessary to obtain a suitable speed parameter in combination with the concentration effect of the actual process sample sludge, and use this speed to concentrate all the sludge, so as to improve the efficiency of the sludge. Based on this, the system of the present application first obtains the separation capacity of the sludge at different speeds by analyzing, and corrects the separation capacity in combination with the uniformity of the sludge at different positions in the drum and the difference from the initial sludge water content, and obtains the optimal speed according to the corrected sludge separation capacity. It avoids the situation that although the concentrated sludge has a strong separation capacity, the separation process can only achieve solid-liquid separation for a very small amount of sludge; on the other hand, considering the problem that the concentration time of the sludge is shortened when the speed is too large, but the sludge is broken up, resulting in low concentration efficiency, the separation capacity is corrected, and the optimal separator speed suitable for the sludge is obtained, thereby improving the concentration efficiency.

[0131] The above are only implementation methods of the present application, and are not intended to limit the scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the protection scope of the present application.

Claims

1. A highly efficient sludge concentration treatment method, characterized in that: include: Collecting part of the sludge to be concentrated as sample sludge from the sludge to be concentrated, concentrating the sample sludge at different rotation speeds, and collecting a first moisture content at a slag outlet and a second moisture content at different positions in the drum of the sample sludge at the same rotation speed; The separation capacity of the sample sludge at the current rotation speed is determined by using the first moisture content at the slag outlet position at the current rotation speed; The correction factor of the separation capacity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed; The separation capacity is corrected based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, and a final rotation speed corresponding to the sample sludge is determined based on the reference separation capacity corresponding to all rotation speeds; Using the final rotation speed to concentrate the sludge to be concentrated; The separation capacity of the sample sludge at the current rotation speed is determined by using the first moisture content at the slag outlet position at the current rotation speed, including: Determine the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current rotation speed based on the first moisture content at the slag outlet position at the current rotation speed; Determine the time it takes for the sample sludge to reach concentration equilibrium at the current rotation speed; Determine the separation capacity of the sample sludge at the current rotation speed based on the first equilibrium moisture content at the slag outlet position when the sample sludge reaches the concentration equilibrium at the current rotation speed and the time consumed when the sample sludge reaches the concentration equilibrium at the current rotation speed; Determining the first equilibrium moisture content at the slag outlet position when the sample sludge reaches concentration equilibrium at the current rotation speed based on the first moisture content at the slag outlet position at the current rotation speed includes: Record the first moisture content at the slag outlet position at the current rotation speed to obtain a first moisture content sequence; Calculate the difference between two adjacent first moisture contents in the first moisture content sequence to obtain a moisture content difference sequence; If the absolute values ​​of all differences after the kth difference in the moisture content difference sequence are less than a preset value, then the first moisture content corresponding to the kth difference is determined to be the first equilibrium moisture content at the slag outlet when the sample sludge reaches concentration equilibrium at the current rotation speed; Determine the time it takes for the sample sludge to reach concentrated equilibrium at the current rotation speed, including: The collection time of the first moisture content corresponding to the kth difference is determined as the time consumed when the sample sludge reaches concentration equilibrium at the current rotation speed; The separation capacity of the sample sludge at the current rotation speed is determined based on the first equilibrium moisture content at the slag outlet position when the concentration equilibrium is reached and the time consumed when the sample sludge reaches the concentration equilibrium, including: The following formula is used to determine the separation capacity of the sample sludge at the current rotation speed: ； in, It indicates the separation capacity of sample sludge at the rotation speed r, It indicates the first equilibrium moisture content at the slag outlet when the sample sludge reaches the concentration equilibrium at the rotation speed r. It represents the time consumed by the sample sludge to reach the concentration equilibrium at the rotation speed r, and exp represents the exponential function with the natural constant e as the base; The correction factor of the separation capacity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed, including: The dehydration uniformity of the sample sludge at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed; The second moisture content at different positions in the drum at the current rotation speed is used to determine the average time and average moisture content consumed when the sample sludge reaches concentration equilibrium at different positions in the drum at the current rotation speed; Determining a correction factor for the separation capacity of the sample sludge at the current rotation speed based on the average time, the average moisture content, the initial moisture content of the sample sludge, and the dehydration uniformity of the sample sludge at the current rotation speed; The second moisture content at different positions in the drum at the current rotation speed is used to determine the dehydration uniformity of the sample sludge at the current rotation speed, including: Determine the separation capacity of the sample sludge at different positions of the drum at the current rotation speed based on the second moisture content at different positions in the drum at the current rotation speed; The time consumed for the sample sludge to reach concentration equilibrium at different positions in the drum at the current rotation speed is determined by using the second moisture content at different positions in the drum at the current rotation speed; Based on the difference in separation capacity of the sample sludge at different positions of the drum at the current rotation speed, the difference in time consumed when the sample sludge at different positions in the drum reaches concentration equilibrium at the current rotation speed, and the number of positions in the drum where the second moisture content is detected, determine the average difference between the separation capacity of each position of the drum at the current rotation speed and the separation capacity of the remaining positions, wherein the average difference represents the dehydration uniformity of the sample sludge at the current rotation speed; The following formula is used to determine the average difference between the separation capacity of each position of the drum and the separation capacity of the remaining positions at the current rotation speed of the sample sludge: ； in, Indicates the dehydration uniformity of the sample sludge at the rotation speed r, Indicates the number of locations in the drum where the second moisture content is detected. It indicates the separation capacity at position i in the drum at speed r, It indicates the separation capacity at position j in the drum at speed r. It indicates the time it takes for position i in the drum to reach concentration equilibrium at speed r. It indicates the time it takes for the position j in the drum to reach the concentration equilibrium at the rotation speed r; The correction factor for the separation capacity of the sample sludge at the current rotation speed is determined using the following formula: ； in, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, represents the initial moisture content of the sample sludge, It indicates the average moisture content of the sample sludge at different positions in the drum when it reaches concentration equilibrium at the rotation speed r. It represents the average time consumed by the sample sludge to reach concentration equilibrium at different positions in the drum at the rotation speed r, and exp represents the exponential function with the natural constant e as the base.

2. A highly efficient sludge concentration treatment method according to claim 1, characterized in that: The separation capacity is corrected based on the correction factor to obtain a reference separation capacity corresponding to the current rotation speed, including: The reference separation capacity corresponding to the current speed is obtained using the following formula: in, It represents the reference separation capacity corresponding to the speed r, The correction factor representing the separation capacity of the sample sludge at the rotation speed r, It indicates the separation capacity of sample sludge at the rotation speed r; Determining a final rotation speed corresponding to the sample sludge based on the reference separation capacity corresponding to all rotation speeds includes: The rotation speed with the maximum reference separation capacity is determined as the final rotation speed corresponding to the sample sludge.

3. A highly efficient sludge concentration treatment system, characterized in that: The system is used to implement the steps of a high-efficiency sludge concentration treatment method as described in any one of claims 1-2, and the system comprises: A data acquisition module is used to collect part of the sludge to be concentrated as sample sludge, concentrate the sample sludge at different rotation speeds, and collect a first moisture content at a slag outlet and a second moisture content at different positions in the drum of the sample sludge at the same rotation speed; A first calculation module is used to determine the separation capacity of the sample sludge at the current rotation speed by using the first moisture content at the slag outlet position at the current rotation speed; A second calculation module is used to determine a correction factor of the separation capacity of the sample sludge at the current rotation speed by using the second moisture content at different positions in the drum at the current rotation speed; A rotation speed determination module, used to correct the separation capacity based on the correction factor, so as to obtain a reference separation capacity corresponding to the current rotation speed, and determine a final rotation speed corresponding to the sample sludge based on the reference separation capacities corresponding to all rotation speeds; The concentration processing module is used to perform concentration processing on the sludge to be concentrated by utilizing the final rotation speed.

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