A sludge thickener

Abstract

The embodiment of the present specification provides a sludge thickener, which comprises a reaction cover, a driving device, a screw rod, a screen, a blowing device and an elastic discharge device, the screw rod is arranged in the screen, and the screen is arranged in the reaction cover. Wherein, the reaction cover comprises a first reaction cover, a second reaction cover and a third reaction cover, the first reaction cover is provided with a sludge inlet, and the third reaction cover is provided with a sludge outlet; the driving device is connected with the screw rod and is configured to drive the screw rod to rotate; the screw rod is configured to convey sludge by rotating; the pitch of the screw rod gradually decreases and the diameter gradually increases from the sludge inlet to the sludge outlet; the screen is configured to filter the moisture in the sludge, and the mesh size of the screen is adjustable; the blowing device is configured to spray compressed gas to the screen; and the elastic discharge device is configured to elastically block the sludge outlet.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of sludge treatment, in particular to a sludge thickener. BACKGROUND

[0002] Sludge generally refers to solid precipitated matter generated in the process of sewage treatment, which is an extremely complex heterogeneous body composed of organic residues, bacterial cells, inorganic particles, and colloidal sludge. The main characteristics of sludge are high water content (which can be as high as 99% or more), thick consistency between liquid and solid, high organic matter content, easy to rot and emit odor, fine particles, small specific gravity, and gelatinous liquid state. Sludge can be transported by pump, but it is difficult to separate solid and liquid by sedimentation. When sludge is treated, it needs to be concentrated and dewatered to reduce the water content of sludge.

[0003] Under the existing conditions, mechanical methods are generally used in sewage plants for sludge dewatering treatment, and the water content of filter cake is generally 75-85%, which cannot meet the latest environmental protection requirements. One of the factors affecting the sludge dewatering efficiency is that the filter structure is easily blocked by solid particles in the sewage, resulting in reduced water filtration efficiency.

[0004] Therefore, it is desirable to provide a sludge thickener which can reduce the adverse effects of sludge on the filter structure and ensure the water filtration effect of the filter structure. SUMMARY

[0005] One or more embodiments of the present specification provide a sludge thickener. The sludge thickener comprises a reaction cover, a driving device, a screw, a screen, a blowing device, and an elastic unloading device, the screw is arranged in the screen, and the screen is arranged in the reaction cover. Wherein the reaction cover comprises a first reaction cover, a second reaction cover, and a third reaction cover, the first reaction cover is provided with a sludge inlet, and the third reaction cover is provided with a sludge outlet; the driving device is connected with the screw and is configured to drive the screw to rotate;

[0006] The screw is configured to convey sludge by rotating; the pitch of the screw gradually decreases and the diameter gradually increases from the sludge inlet to the sludge outlet; the screen is configured to filter water in the sludge, and the mesh size of the screen is adjustable; the blowing device is configured to spray compressed gas to the screen; and the elastic unloading device is configured to elastically block the sludge outlet.

[0007] In some embodiments, the screen comprises a first screen and a second screen, and the first screen and the second screen are relatively slidable to adjust the mesh size of the screen.

[0008] In some embodiments, a screen driving device is further included, which is connected with the first screen and / or the second screen to drive the first screen and / or the second screen to rotate.

[0009] In some embodiments, the air blowing device comprises an angle adjusting mechanism configured to adjust the jet angle of the air blowing device.

[0010] In some embodiments, a trumpet-shaped opening is arranged on the second reaction cover, and the opening is connected with the air blowing device.

[0011] In some embodiments, the screw comprises a plurality of sub-screws.

[0012] In some embodiments, the elastic discharging device comprises an elastic member and a stopper, and the stopper is shielded by the elastic force of the elastic member.

[0013] In some embodiments, the elastic member is a gas spring.

[0014] In some embodiments, a feeding device is further included, and the feeding device comprises a dosing tank configured to adjust the usage amount of the flocculant.

[0015] In some embodiments, a sensing system and a controller are further included, the sensing system comprises a screw torque detector and a sludge concentration detector, the screw torque detector is configured to obtain the screw torque, the sludge concentration detector is configured to obtain the sludge concentration, and the controller is configured to adjust the rotating speed of the screw, the mesh size of the screen, and the jet angle of the air blowing device based on the screw torque and the sludge concentration. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present specification will be further illustrated in the manner of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same reference numbers represent the same structures, wherein:

[0017] Figure 1 is a structural schematic diagram of a sludge thickener according to some embodiments of the present specification;

[0018] Figures 2A-2B is a structural schematic diagram of a screen according to some embodiments of the present specification;

[0019] Figure 3 is Figure 1 is a structural schematic diagram of a screen driving device cooperating with a screen at A in FIG. 1;

[0020] Figure 4is a structural schematic diagram of an angle adjusting mechanism, a blowing device and an opening according to some embodiments of the present specification cooperated with each other;

[0021] Figure 5 is a structural schematic diagram of an elastic unloading device according to some embodiments of the present specification;

[0022] Figure 6 is a structural schematic diagram of a feeding device according to some embodiments of the present specification;

[0023] Figure 7 is an exemplary schematic diagram of a torque state evaluation model according to some embodiments of the present specification;

[0024] Figure 8 is an exemplary schematic diagram of a service life prediction model according to some embodiments of the present specification;

[0025] Figure 9 is an exemplary schematic diagram of a concentration efficiency prediction model according to some embodiments of the present specification. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can also be applied to other similar scenarios without creative labor. Unless it is clear from the language context or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0027] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0028] As shown in the specification and claims, unless the context clearly indicates otherwise, "one", "a", "an" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "contain" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0029] This specification provides a sludge thickener in several embodiments. The thickener includes a reaction chamber, a drive unit, a screw, a screen, and an air blowing device. A conveying space is formed inside the reaction chamber, and the screen is disposed within the reaction chamber. The screw, rotatably mounted within the screen, includes screw blades. When the screw rotates, the screw blades convey and compress the sludge, allowing water in the sludge to be filtered out through the screen. The air blowing device sprays compressed gas onto the screen, thereby blowing away any objects (such as sludge) clogging the screen. By using the screw blades, simultaneous conveying and compression of sludge can be achieved, improving the efficiency of sludge thickening. The air blowing device can clean the screen, ensuring its filtration effect. The sludge thickening effect can be further improved by incorporating a flexible discharge device.

[0030] The sludge thickeners described in some embodiments of this specification are applicable to a variety of industries and scenarios. For example, they can be used in wastewater treatment, environmental protection, chemical industry, food industry, papermaking, textile industry, etc.

[0031] Figure 1 This is a structural schematic diagram of a sludge thickener according to some embodiments of this specification.

[0032] like Figure 1 As shown, the sludge thickener 100 includes a reaction chamber 110, a drive unit 120, a screw 130, a screen 140, an air blowing device 150, and a flexible discharge device (not shown). In some embodiments, the screw 130 is disposed within the screen 140, and the screen 140 is disposed within the reaction chamber 110. In some embodiments, the drive unit 120 is connected to the screw 130, and the drive unit 120 drives the screw 130 to rotate. The screw 130 conveys sludge by rotation, from the sludge inlet 1111 to the sludge outlet 1131. The pitch of the screw 130 gradually decreases, and the diameter gradually increases. In some embodiments, the screen 140 is configured to filter moisture from the sludge. The mesh size of the screen 140 is adjustable, and the air blowing device 150 can spray compressed gas onto the screen 140. In some embodiments, the flexible discharge device is configured to resiliently block the sludge outlet 1131.

[0033] The reaction hood 110 serves to protect, isolate, and / or enclose the sludge, and a concentration space for concentrated sludge can be formed inside the reaction hood 110. In some embodiments, the reaction hood 110 can have various shapes, such as one or more of cylindrical, prismatic, or irregular shapes. In some embodiments, the axis of the reaction hood 110 can be arranged in various directions. For example, it can be arranged in a vertical direction (e.g., Figure 1 (in the Z direction), set along the horizontal direction (for example, Figure 1 (e.g., the X direction) or a direction inclined relative to the vertical direction.

[0034] In some embodiments, the reaction cover 110 can be a one-piece structure. In some embodiments, the reaction cover 110 can be a split structure. For example, the reaction cover 110 can be split into at least two sections in the axial and / or circumferential direction. In some embodiments, the reaction cover 110 can include a first reaction cover 111, a second reaction cover 112, and a third reaction cover 113.

[0035] In some embodiments, the first reaction cover 111, the second reaction cover 112, and the third reaction cover 113 can be connected in sequence in a direction opposite to the Z direction. In some embodiments, the first reaction cover 111, the second reaction cover 112, and the third reaction cover 113 can be cylindrical structures, and the two ends of the second reaction cover 112 are respectively sealed to one end of the first reaction cover 111 and the third reaction cover 113. Exemplary sealing methods include, but are not limited to, welding sealing, threaded sealing, etc.

[0036] In some embodiments, the first reaction cover 111, the second reaction cover 112, and the third reaction cover 113 are respectively provided with flanges at their two ends, and a plurality of through holes are provided on the flanges, and the through holes of the corresponding two flanges are correspondingly provided. In some embodiments, the two flanges can be connected by screws, i.e., the first reaction cover 111 and the second reaction cover 112, and the second reaction cover 112 and the third reaction cover 113 can be connected by flanges and screws. By using flanges for sealing connection, the strength and rigidity of the first reaction cover 111, the second reaction cover 112, and the third reaction cover 113 can be effectively increased.

[0037] In some embodiments, the two ends of the reaction cover 110 can be closed using various closure structures. For example, when the reaction cover 110 is arranged in the vertical direction, the bottom and top of the reaction cover 110 can be closed using one or more of plate structures, foundations, racks, etc.

[0038] In some embodiments, the reaction cover 110 can be made of corrosion-resistant materials. For example, one or more of stainless steel, aluminum alloy, nickel alloy, titanium steel alloy, etc. In some embodiments, the reaction cover 110 can be formed in various ways. For example, it can be formed by bending and / or folding a plate. For example, it can be formed by casting. For more information about the reaction cover 110, please refer to the relevant description in other parts of this specification (such as Figure 4 and related descriptions).

[0039] The sludge inlet 1111 refers to an inlet through which sludge enters the reaction cover 110. The sludge inlet 1111 can at least include a pipe in communication with the inside of the reaction cover 110. The sludge outlet 1131 refers to an outlet through which the concentrated sludge is discharged from the reaction cover 110. The sludge outlet 1131 can at least include a pipe in communication with the inside of the reaction cover 110. In some embodiments, the sludge inlet 1111 can be higher than the sludge outlet 1131. When the sludge is transported from top to bottom in the reaction cover 110, the transportation structure does not need to overcome the gravity of the sludge, which is conducive to reducing the power consumption of the transportation structure. In addition, the sludge is continuously extruded during the transportation from top to bottom, which can improve the efficiency of solid-liquid separation. In some embodiments, the sludge inlet 1111 and the sludge outlet 1131 can be located at different sides of the reaction cover 110, respectively, so that the structure connected to the sludge inlet 1111 and the structure connected to the sludge outlet 1131 are isolated from each other to avoid interference.

[0040] The driving device 120 refers to a device capable of outputting a pushing force or torque to drive other structures to move. For example, a motor, an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, etc. In some embodiments, the driving device 120 is arranged at one end of the reaction cover 110, such as the top of the reaction cover 110.

[0041] In some embodiments, the driving device 120 can further include a speed reducer. The speed reducer can be in transmission connection with the output shaft of the motor to change the rotation speed output by the driving device 120.

[0042] The screw rod 130 refers to a rod-shaped structure with a spiral structure. The spiral structure can include threads, spiral grooves, spiral blades (such as screw rod blades), etc. In some embodiments, the screw rod 130 includes a main shaft 131 and screw rod blades 132, and the screw rod blades 132 are arranged in a spiral shape on the circumferential surface of the main shaft 131. In some embodiments, the driving device 120 is connected to the screw rod 130, and the driving device 120 is configured to drive the screw rod 130 to rotate. In some embodiments, the main shaft 131 is in transmission connection with the driving device 120. The driving device 120 can drive the main shaft 131 to rotate, and the screw rod blades 132 rotate synchronously with the main shaft 131. In some embodiments, the screw rod 130 is configured to transport sludge by rotating. When the screw rod blades 132 rotate, a pushing force can be applied to the sludge to extrude the sludge.

[0043] In some embodiments, the pitch of the screw 130 gradually decreases and the diameter gradually increases from the sludge inlet 1111 to the sludge outlet 1131. The diameter of the screw 130 refers to the diameter of the main shaft 131. In some embodiments, the main shaft 131 can include a cylinder, a cone, and / or a circular truncated cone, etc. In some embodiments, when the reaction cover 110 is arranged along the vertical direction, the main shaft 131 can be transitioned from a cylinder to a cone with gradually increasing diameter along the direction opposite to the Z direction (i.e., the end of the main shaft 131 close to the sludge inlet 1111 points to the end of the main shaft 131 close to the sludge outlet 1131). When the sludge is concentrated, the concentration of the sludge along the direction opposite to the Z direction in the reaction cover 110 becomes higher and higher. By gradually increasing the diameter of the main shaft 131, not only the strength of the main shaft 131 can be enhanced to avoid damage to the main shaft 131 when the sludge is concentrated, but also the extrusion force of the screw 130 on the sludge can be increased to enhance the concentration effect. In some embodiments, when the reaction cover 110 is arranged along the vertical direction, the diameter of the main shaft 131 (i.e., the diameter of the screw 130) can remain unchanged along the direction opposite to the Z direction, i.e., the screw 130 is a straight screw, to reduce the process difficulty and save the manufacturing cost.

[0044] In some embodiments, the pitch of the screw blade 132 can be the same or different along the axial direction of the main shaft 131. In some embodiments, when the reaction cover 110 is arranged along the vertical direction, the pitch of the screw blade 132 corresponding to the direction opposite to the Z direction can gradually decrease. By decreasing the pitch, the extrusion effect of the screw blade 132 on the sludge can be enhanced, and the efficiency of concentrating the sludge can be improved.

[0045] In some embodiments, the two ends of the main shaft 131 can be rotationally connected with the sealing structures sealing the two ends of the reaction cover 110, respectively. In some embodiments, the two ends of the main shaft 131 can be dynamically sealed with the sealing structures sealing the two ends of the reaction cover 110, respectively.

[0046] In some embodiments, the screw 130 can include multiple sub-screws.

[0047] The sub-screw is a unit that combines to form the screw 130. In some embodiments, the multiple sub-screws can be connected with each other. In some embodiments, the multiple sub-screws can be coaxially connected. In some embodiments, the multiple sub-screws can be connected with each other in multiple ways. Exemplary connection ways include threaded connection, flange connection, buckle connection, welding, etc. In some embodiments, the diameters of the main shafts 131 corresponding to the multiple sub-screws can be the same or different. In some embodiments, the pitches of the screw blades 132 corresponding to the multiple sub-screws can be the same or different.

[0048] In some embodiments, the multi-segment sub-screws can be combined to form a screw 130 with at least one segment of the main shaft 131 having a constant diameter and / or at least one segment of the main shaft 131 having a varying diameter. In some embodiments, the multi-segment sub-screws can be combined to form a screw 130 with at least one segment of the screw blade 132 having a constant pitch and / or at least one segment of the screw blade 132 having a varying pitch. In some embodiments, the degree of variation of the diameter of the main shaft 131 and / or the degree of variation of the pitch of the screw blade 132 is related to the actual requirement (e.g., the requirement of the moisture content of the concentrated sludge). The degree of variation can include the ratio, variance, percentage, etc. of the variation of the diameter of the main shaft 131 and / or the pitch of the screw blade 132. In some embodiments, the degree of variation is positively correlated with the requirement of the moisture content of the concentrated sludge. For example, the higher the requirement of the moisture content of the concentrated sludge (i.e., the lower the moisture content of the concentrated sludge), the greater the degree of variation can be. In some embodiments, the user (e.g., an operator) can determine the degree of variation based on the requirement of the moisture content of the concentrated sludge in a plurality of ways. For example, at least one of the following ways: experience, table lookup, preset algorithm calculation, etc.

[0049] It can be understood that, compared with the screw 130, the sub-screw has a smaller length, is more convenient to process and transport, and is also beneficial to targeted replacement and cost saving. In addition, the sub-screw has a plurality of combination modes, and can be combined to form a screw 130 with a suitable size according to the actual requirement, so that the screw 130 can be widely applied to a plurality of concentration requirements, thereby expanding the application range.

[0050] The screen 140 refers to a filtering structure capable of selectively passing some substances and preventing other substances from passing. In some embodiments, the screen 140 can include a plurality of structures capable of selectively passing some substances. For example, one or more of the following: mesh, grid, long hole, through groove, etc.

[0051] In some embodiments, the screen 140 is configured to filter the moisture in the sludge, i.e., the moisture can pass through the screen 140, and the sludge cannot pass through the screen 140. In some embodiments, the screen 140 is arranged in the reaction cover 110. In some embodiments, the screen 140 can be annular or cylindrical. In some embodiments, the shape of the screen 140 can be adapted to the inner side wall of the reaction cover 110. In some embodiments, the length of the screen 140 along the Z direction is the same as the length of the second reaction cover 112 along the Z direction, and the screen 140 and the second reaction cover 112 are arranged between the first reaction cover 111 and the third reaction cover 113.

[0052] In some embodiments, to better filter sludge of different viscosity, the mesh size of the screen 140 can be adjusted in various ways. For example, the mesh of the screen 140 can be selectively blocked. For another example, the screen 140 with different mesh size can be replaced. For more information on how to adjust the mesh size of the screen 140, please refer to the relevant description in other parts of this specification (e.g. Figures 2A-2B , Figure 3 .

[0053] In some embodiments, a drainage space can be formed between the screen 140 and the second reaction cover 112. In some embodiments, the second reaction cover 112 is provided with a sewage outlet 1122. The sewage outlet 1122 refers to an outlet for discharging sewage from the reaction cover 110. The sewage outlet 1122 can at least include a pipeline in communication with the drainage space. In some embodiments, the water in the sludge is pressed by the screw blade 132 to pass through the screen 140, enter the drainage space, and then be discharged from the sewage outlet 1122.

[0054] The blowing device 150 refers to a device capable of outputting gas or compressed gas in a certain direction. For example, the blowing device 150 can include at least one of an air bag, an air pump, a gas tank, etc. In some embodiments, the blowing device 150 can be used to spray compressed gas to the screen 140. For example, the blowing device 150 can spray compressed gas in a direction perpendicular to the screen 140. For another example, the blowing device 150 can spray compressed gas in a tangential direction of the screen 140.

[0055] In some embodiments, when the screw blade 132 conveys the sludge, it can press part of the sludge to the screen 140, which can cause the sludge to block the mesh of the screen 140, thereby weakening the filtering effect of the screen 140 and causing the concentration of the sludge to be poor. By using the blowing device 150 to spray compressed gas to the screen 140, the sludge on the screen 140 can be separated from the mesh, thereby restoring the filtering effect of the screen 140. For more information on the blowing device 150, please refer to the relevant description in other parts of this specification (e.g. Figure 4 and the related description thereof).

[0056] The elastic discharge device refers to a device that can selectively allow objects to pass through. In some embodiments, the elastic discharge device can be used to selectively block the sludge outlet 1131. For more information on the elastic discharge device, please refer to Figure 5 and the related description thereof.

[0057] In some embodiments, the sludge thickener can further include a flushing device (not shown in the figure). In some embodiments, the flushing device can be used to periodically spray flushing water to the screen 140, further cleaning the screen 140.

[0058] In some embodiments, when the sludge needs to be concentrated, the sludge is transported into the reaction cover 110 from the sludge inlet 1111, and the driving device 120 is started to drive the rotation of the screw rod 130. During the rotation of the screw rod 130, the sludge is moved from the sludge inlet 1111 to the sludge outlet 1131 by the screw rod blade 132. During the movement of the sludge, the screw rod blade 132 can extrude the sludge, so that the water in the sludge is gradually discharged from the screen 140 into the drainage space and then discharged from the sewage outlet 1122. During the movement of the sludge from the sludge inlet 1111 to the sludge outlet 1131, the water in the sludge is gradually reduced, and the sludge is gradually concentrated. The concentrated sludge is discharged from the sludge outlet 1131 under the action of pressure. In addition, when the concentrated sludge passes through the sludge outlet 1131, the sludge is further extruded under the action of the elastic discharge device, so that the sludge can be further concentrated. It can be understood that the sludge can be continuously transported into the reaction cover 110 from the sludge inlet 1111, so as to realize continuous concentration of the sludge.

[0059] According to some embodiments of the present specification, by using the screw rod, the sludge can be extruded and the water can be discharged during the transportation of the sludge, so as to improve the efficiency of concentrating the sludge. By gradually reducing the pitch of the screw rod and gradually increasing the diameter of the screw rod, the extrusion effect of the screw rod on the sludge can be gradually increased, the efficiency of concentrating the sludge can be improved, the strength of the screw rod can be improved, and the damage of the screw rod can be avoided. By adjusting the size of the screen mesh according to the needs, the efficiency of dewatering the sludge can be controlled, and the dewatering of the sludge with different viscosities can be adapted. By using the blowing device, compressed gas can be sprayed to the screen according to the needs, so that the solid blocking the screen can be separated from the screen, and the filtering effect and service life of the screen can be ensured. By setting the elastic discharge device, the concentration effect of the sludge can be further improved.

[0060] Figures 2A-2B is a structural schematic diagram of a screen according to some embodiments of the present specification.

[0061] As Figures 2A-2B shown, the screen 140 includes a first screen 141 and a second screen 142, and the first screen 141 and the second screen 142 can slide relative to each other to adjust the size of the screen mesh of the screen 140.

[0062] The first screen 141 refers to the screen 140 close to the reaction cover 110. The second screen 142 refers to the screen 140 far from the reaction cover 110. In some embodiments, the first screen 141 and the second screen 142 both have uniformly arranged screen holes, and the screen holes of the first screen 141 and the screen holes of the second screen 142 are arranged correspondingly, that is, one screen hole of the first screen 141 corresponds to one screen hole of the second screen 142. In some embodiments, the sizes (such as diameters) of the screen holes of the first screen 141 and the screen holes of the second screen 142 can be the same or different, which can be determined based on actual needs.

[0063] The screen hole of the screen 140 refers to the screen hole formed after the screen holes of the first screen 141 and the screen holes of the second screen 142 are staggered. In some embodiments, the screen hole size of the screen 140 can be determined according to the screen hole size of the first screen 141, the screen hole size of the second screen 142, and the staggering degree of the screen holes of the first screen 141 and the screen holes of the second screen 142. For example, when the screen holes of the first screen 141 and the screen holes of the second screen 142 coincide, the screen hole size of the screen 140 is the smaller value of the screen hole sizes of the first screen 141 and the second screen 142. For another example, when the screen holes of the first screen 141 and the screen holes of the second screen 142 are completely staggered, the screen hole size of the screen 140 is 0, at which time it can be considered that the screen 140 does not have screen holes.

[0064] In some embodiments, the first screen 141 and the second screen 142 can slide relative to each other, so that the screen holes of the first screen 141 and the screen holes of the second screen 142 are staggered, thereby adjusting the screen hole size of the screen 140.

[0065] Figure 3 is Figure 1 A structure diagram of the screen driving device cooperating with the screen is shown in A of FIG. 6.

[0066] In some embodiments, the sludge thickener 100 further comprises a screen driving device 160 connected with the first screen 141 and / or the second screen 142 to drive the first screen 141 and / or the second screen 142 to rotate.

[0067] The screen driving device 160 refers to a device for driving the first screen 141 and / or the second screen 142 to rotate. As shown in FIG. 6, the screen driving device 160 can include a driving motor (not shown in the figure), a speed reducer 162, and a connecting mechanism 161. Figure 3

[0068] In some embodiments, the screen driving device 160 can be connected with the first screen 141 and / or the second screen 142 in various ways to transmit driving force. Exemplary connection methods include but are not limited to threaded connection, buckle connection, welding, etc. ​

[0069] In some embodiments, the screen drive device 160 can drive the first screen 141 to rotate via a drive motor, which is then reduced in speed by a reducer 162. This rotation is achieved through a connecting mechanism 161. When the first screen 141 rotates, the second screen 142 is fixed. This allows the first screen 141 and the second screen 142 to slide relative to each other, causing the mesh openings of the first screen 141 and the second screen 142 to interlock, thus adjusting the mesh size of the screen 140. Similarly, the screen drive device 160 can also drive the second screen 142 to rotate. When the second screen 142 rotates, the first screen 141 is fixed. In some embodiments, the screen drive device 160 may include two drive motors to drive the first screen 141 and the second screen 142 to rotate respectively. It should be noted that when the first screen 141 and the second screen 142 rotate simultaneously, their rotation directions and speeds may be the same or different, and can be set according to actual needs.

[0070] In some embodiments, the rotation direction of the first screen 141 and / or the second screen 142 may be the same as or different from the rotation direction of the screw 130. In some embodiments, the rotation speed of the screen 140 (such as the first screen 141 or the second screen 142) can be set according to actual filtration requirements. In some embodiments, when the first screen 141 and / or the second screen 142 rotates, the air blowing device 150 starts to work, spraying compressed gas onto the screen 140 to prevent the screen 140 from clogging.

[0071] In some embodiments of this specification, a screen drive device is used to drive the first screen and / or the second screen to rotate, so that the first screen and the second screen can slide relative to each other, thereby adjusting the mesh size of the screen according to the actual filtration requirements.

[0072] Figure 4 This is a schematic diagram of the structure of the angle adjustment mechanism, the air blowing device, and the opening that cooperate with each other, according to some embodiments of this specification.

[0073] like Figure 4 As shown, the air blowing device 150 includes an angle adjustment mechanism 151, which is configured to adjust the spray angle of the air blowing device 150.

[0074] The angle adjusting mechanism 151 refers to a mechanism for adjusting the jet angle of the blowing device 150. The jet angle refers to the angle at which the blowing device 150 sprays compressed gas toward the screen 140. For example, the jet angle can be 0°, 15°, 30°, etc. In some embodiments, the jet angle of the blowing device 150 can be the angle between the jet direction of the blowing device 150 and the direction perpendicular to the screen 140 (e.g., the X direction in the figure). For example, when the blowing device 150 sprays compressed gas along the direction perpendicular to the screen 140, the jet angle is 0°. It can be understood that when the jet direction is perpendicular to the screen 140, the jet angle of the blowing device 150 is the smallest, i.e., the jet angle is 0°; when the jet direction is along the tangential direction of the screen 140, the jet angle of the blowing device 150 is the largest, and the maximum jet angle is determined according to the size (e.g., diameter) of the screen 140.

[0075] In some embodiments, the angle adjusting mechanism 151 can include a universal joint 1511, a gas cylinder 1512, and an elastic sealing sleeve 1513. The elastic sealing sleeve 1513 refers to an element capable of elastic sealing. Exemplary elastic sealing sleeves 1513 include rubber rings, silicone rings, etc.

[0076] In some embodiments, the universal joint 1511 is sleeved on the nozzle 152 of the blowing device 150, and the gas cylinder 1512 is fixedly connected with the nozzle 152 of the blowing device 150. The fixed connection can include detachable connection (e.g., threaded connection, buckle connection, etc.) and non-detachable connection (e.g., welding, etc.).

[0077] It should be noted that the positions of the universal joint 1511 and the gas cylinder 1512 on the blowing device 150 are not limited, as long as they can achieve the function of adjusting the jet angle of the blowing device 150. For example, the universal joint 1511 can be arranged at the distal end (the end away from the reaction cover 110) of the blowing device 150, and the gas cylinder 1512 can be arranged at the proximal end (the end close to the reaction cover 110) of the blowing device 150, etc.

[0078] In some embodiments, the second reaction cover 112 is provided with a trumpet-shaped opening 1121, and the opening 1121 is connected with the blowing device 150.

[0079] In some embodiments, in order to more effectively clean the sludge on the screen 140 by using the compressed gas sprayed by the blowing device 150, the nozzle 152 of the blowing device 150 can be inserted into the trumpet-shaped opening 1121. In some embodiments, the connection between the nozzle 152 and the opening 1121 is provided with an elastic sealing sleeve 1513 to seal the connection while facilitating the adjustment of the jet angle of the blowing device 150.

[0080] In some embodiments, when it is necessary to adjust the jet angle of the blowing device 150, the air cylinder 1512 performs a telescopic movement. Since the nozzle 152 of the blowing device 150 is sleeved with the universal joint 1511, and an elastic sealing sleeve 1513 is arranged at the joint between the nozzle 152 and the opening 1121, the nozzle 152 can be offset under the action of the air cylinder 1512, so that the jet angle of the blowing device 150 changes. For example, when the viscosity of the sludge is large, the screen 140 is easily blocked, at this time, the jet angle of the blowing device 150 can be adjusted to 0°, that is, the jet direction is adjusted to be perpendicular to the screen 140, so as to increase the pressure of the compressed gas jetted out, and the screen 140 is effectively cleaned. For another example, when the viscosity of the sludge is small, the screen 140 is not easily blocked, at this time, the jet angle of the blowing device 150 can be adjusted to the maximum jet angle, that is, the jet direction is adjusted to be tangential to the screen 140, so as to avoid the pressure on the screen 140 increasing, thereby prolonging the service life of the screen 140.

[0081] In some embodiments, the jet angle of the blowing device 150 can be adjusted according to the rotation speed of the screen 140. For example, when the rotation speed of the screen 140 does not exceed a speed threshold, the jet angle of the blowing device 150 can be adjusted to 0°, that is, the jet direction is adjusted to be perpendicular to the screen 140, so as to increase the pressure of the compressed gas jetted out, and avoid the screen 140 being blocked. For another example, when the rotation speed of the screen 140 exceeds the speed threshold, the jet angle of the blowing device 150 can be adjusted to the maximum jet angle, that is, the jet direction is adjusted to be tangential to the screen 140, so as to avoid the pressure on the screen 140 increasing, thereby reducing the damage to the screen 140.

[0082] In some embodiments, the jet angle of the blowing device 150 is related to the stroke of the air cylinder 1512, and the corresponding relationship therebetween can be determined according to a first control table. The first control table can be constructed based on the historical jet angle of the blowing device 150 and the historical stroke of the air cylinder 1512.

[0083] For more information about how to adjust the jet angle of the blowing device, please refer to the relevant content in other parts of the specification.

[0084] According to some embodiments of the present specification, by setting the angle adjusting mechanism, the jet angle of the blowing device is adjusted in real time according to the viscosity of the sludge (or the blocking condition of the screen), so that the filtering effect of the screen on the sludge is improved, and the pressure on the screen is reduced and the service life of the screen is prolonged.

[0085] Figure 5 FIG. 1 is a structural schematic diagram of an elastic unloading device according to some embodiments of the present specification.

[0086] AsFigure 5 As shown, the elastic unloading device 170 includes an elastic member 171 and a blocking block 172. The blocking block 172 is shielded from the sludge outlet 1131 by the elastic force of the elastic member 171.

[0087] The elastic member 171 refers to an element with elastic force. For example, the elastic member 171 can include, but is not limited to, a compression spring, etc. In some embodiments, the elastic member 171 is a gas spring.

[0088] The gas spring is an element used as a spring by filling high-pressure gas (such as nitrogen) in a closed cylinder and continuously using the reaction force of the high-pressure gas. For example, the gas spring can include a free-type gas spring, a traction-type gas spring, etc.

[0089] In some embodiments, since the gas spring has the significant advantages of relatively slow speed, easy control, and small dynamic pressure change, etc., the elastic member 171 in the elastic unloading device 170 adopts the gas spring, which not only ensures the elastic force of the elastic member 171 to effectively shield the sludge outlet 1131 by the blocking block 172, but also effectively reduces the probability of failure of the elastic member 171.

[0090] The blocking block 172 refers to an element capable of shielding the sludge outlet 1131. In some embodiments, the blocking block 172 can be designed in various structural shapes. For example, the blocking block 172 can be a conical body, a cylindrical body, a cubic body, etc.

[0091] In some embodiments, the elastic unloading device 170 can further include a support structure 173. The support structure 173 refers to a structure fixedly connected to the reaction cover 110 and used for fixing the elastic member 171. In some embodiments, the support structure 173 can be designed in any feasible structural shape, as long as it can stably fix the elastic member 171.

[0092] In some embodiments, one end of the elastic member 171 is fixedly connected to the support structure 173, the other end of the elastic member 171 is fixedly connected to the blocking block 172, and the blocking block 172 is inserted into the sludge outlet 1131. When the concentrated sludge is discharged from the sludge outlet 1131, the elastic unloading device 170 can use the elastic force of the elastic member 171 to push the blocking block 172 to shield the sludge outlet 1131, so as to further extrude the concentrated sludge.

[0093] In some embodiments of the present specification, the elastic unloading device adopts an elastic member and a blocking block. The blocking block shields the sludge outlet by the elastic force of the elastic member, which can achieve further extrusion of the concentrated sludge, thereby further improving the dewatering rate of the sludge thickener.

[0094] Figure 6 FIG. 1 is a structural schematic diagram of a feeding device according to some embodiments of the present specification.

[0095] In some embodiments, the sludge thickener 100 further comprises a feeding device 180, the feeding device 180 comprising a dosing tank 181 configured to adjust the dosage of the flocculant.

[0096] The feeding device 180 refers to a device for introducing sludge into the reaction hood 110. As shown, the feeding device 180 can be connected with the sludge inlet 1111 to introduce sludge into the reaction hood 110. Figure 6

[0097] The dosing tank 181 refers to a structure in the feeding device 180 for adding a drug (such as a flocculant). In some embodiments, the cross-sectional shape of the dosing tank 181 is not limited and can be a regular or irregular shape such as a square, a circle or an ellipse.

[0098] The dosage of the flocculant refers to the dosage of the flocculant added. In some embodiments, the dosage of the flocculant can be determined according to historical experience, experiments, etc.

[0099] In some embodiments, the feeding device 180 can further comprise a sludge pump 182 and a sludge pipeline 183. The sludge pump 182 refers to a device capable of pumping sludge into the reaction hood 110. The sludge pipeline 183 refers to a channel for transporting sludge into the reaction hood 110. In some embodiments, the sludge pipeline 183 comprises at least two sections, and the two ends of the sludge pump 182 are respectively and sealingly connected to one end of the two sections of the sludge pipeline 183. In some embodiments, one end of the sludge pipeline 183 is connected with the sludge inlet 111, and when the sludge pump 182 is working, sludge can be transported into the reaction hood 110 through the sludge pipeline 183.

[0100] In some embodiments, the dosing tank 181 is arranged at the proximal end (such as the end close to the reaction hood 110) of the sludge pipeline 183, and the dosing tank 181 communicates with the sludge pipeline 183 to facilitate the addition of the flocculant.

[0101] In some embodiments of the present specification, by providing a feeding device, sludge can be continuously pumped into the reaction hood, thereby realizing continuous operation of the sludge thickener and improving work efficiency. Moreover, the feeding device comprises a dosing tank, and the dosage of the flocculant can be adjusted in real time by using the dosing tank, so that the dosage of the drug is more reasonable and the cost of sludge thickening is reduced.

[0102] In some embodiments, the sludge thickener further comprises a sensing system (not shown in the figure) and a controller (not shown in the figure), the sensing system comprising a screw torque detector and a sludge concentration detector. The screw torque detector is configured to obtain the screw torque, and the sludge concentration detector is configured to obtain the sludge concentration. The controller is configured to adjust the rotational speed of the screw, the mesh size of the screen and the jet angle of the blowing device based on the screw torque and the sludge concentration.​

[0103] The sensing system refers to a system for detecting various parameters of the sludge thickener.

[0104] The sludge concentration detector refers to a device or instrument for monitoring and recording the sludge concentration in real time. In some embodiments, the sludge concentration detector can be arranged at any feasible position of the sludge thickener, such as the sludge outlet.

[0105] The screw torque detector refers to a sensing device or instrument for monitoring and recording the screw torque in real time, such as a torque sensor. The screw torque can include the main shaft torque and the blade torque. In some embodiments, the screw torque detector can be arranged on the main shaft of the screw to obtain the main shaft torque. In some embodiments, the screw torque detector can also be arranged on the screw blade of the screw to obtain the blade torque.

[0106] In some embodiments, the screw torque detector and the sludge concentration detector can also obtain the corresponding data based on the first time interval and the second time interval, respectively. The first time interval and the second time interval can be preset values, empirical values, etc. The first time interval and the second time interval can be the same or different.

[0107] For more information about the screw torque detector, please refer to the relevant description in other parts of this specification (such as Figure 7 and the related description).

[0108] The controller refers to a device or software program for controlling other components or systems. For example, the controller can include a PID controller, a PLC controller, a CNC controller, etc.

[0109] In some embodiments, the controller and other components (such as the sensing system) can interact with data and control through various communication methods. Exemplary communication methods include wired communication (such as circuits, electrical signals, etc.), wireless communication (such as radio, infrared signals, WIFI, Bluetooth, 5G, etc.).

[0110] In some embodiments, based on the screw torque and the sludge concentration, the controller can adjust the rotation speed of the screw, the mesh size of the screen, and the injection angle of the air blowing device in various ways. For example, based on the screw torque and the sludge concentration, the controller can adjust the rotation speed of the screw, the mesh size of the screen, and the injection angle of the air blowing device based on historical experience or a preset relationship table. For more information on how to adjust the rotation speed of the screw, the mesh size of the screen, and the injection angle of the air blowing device, please refer to the relevant description in other parts of this specification (such as Figures 8-9 and the related description).

[0111] In some embodiments of this specification, by setting up a sensing system and a controller, the sensing system monitors the screw torque and sludge concentration in real time, and the controller adjusts the screw speed, screen mesh size and air blowing angle in real time based on the screw torque and sludge concentration. This not only effectively ensures the concentration effect of the sludge thickener, but also reduces the operating cost of the equipment and extends its service life.

[0112] Figure 7 This is an exemplary schematic diagram of a torque state evaluation model according to some embodiments of this specification.

[0113] In some embodiments, the number of screw torque detectors is one or more, and the multiple screw torque detectors are respectively disposed on multiple screw blades and configured to detect the blade torque of the multiple screw blades respectively. In some embodiments, the controller is configured to issue an early warning and remind the user to replace the screw segment in response to an abnormality in the blade torque of a screw segment.

[0114] In some embodiments, the controller can determine whether the blade torque of a certain screw segment is abnormal in a variety of ways. For example, the controller can determine whether the blade torque of a certain screw segment is abnormal based on whether the blade torque exceeds a torque threshold. In some embodiments, the torque threshold can be a preset value, an empirical value, or an experimental value, etc.

[0115] In some embodiments, the controller can also use a torque state assessment model to process the rotational speed of the screen and the blade torque vector sequence to determine the location of abnormal torque. The location of abnormal torque is the position of the screw blade of the sub-screw where the blade torque is abnormal.

[0116] A torque state assessment model is a model used to determine the location of abnormal torque. In some embodiments, the torque state assessment model can be a machine learning model. For example, the torque state assessment model may include one or more combinations of Deep Neural Networks (DNN) models, Recurrent Neural Networks (RNN) models, or custom models.

[0117] like Figure 7 As shown, the inputs to the torque state assessment model 220 may include the rotation speed 211 of the screen and the blade torque vector sequence 212, and the output of the torque state assessment model 220 may include the abnormal torque position 230.

[0118] The rotational speed 211 of the screen refers to the speed at which the screen rotates under the action of the screen drive device. In some embodiments, the controller can obtain the rotational speed 211 of the screen from the screen drive device. For example, the rotational speed 211 of the screen can be calculated based on the output speed of the drive motor and the reduction ratio of the reducer.

[0119] The blade torque vector refers to a vector composed of blade torques based on preset rules. These preset rules are pre-defined torque arrangement rules. For example, preset rules may include arranging the blade torques based on the screw torque detector's serial number or based on the screw torque detector's location.

[0120] The blade torque vector sequence 212 refers to the sequence of blade torque vectors at each time point within a preset time period. For example, the blade torque vectors within the preset time period are denoted as (a1, b1, c1), (a2, b2, c2)...(a...). n b n c n If the blade torque vector sequence can be represented as ((a1, b1, c1), (a2, b2, c2), ..., (a...), then the blade torque vector sequence can be represented as ((a1, b1, c1), (a2, b2, c2), ..., (a...). n b n c n In this context, 'a' represents the blade torque corresponding to sub-screw A; 'b' represents the blade torque corresponding to sub-screw B; and 'c' represents the blade torque corresponding to sub-screw C. In some embodiments, the value of 'n' can be obtained by equally dividing a preset time period. For example, if the preset time period is 15 minutes (e.g., 10:30 to 10:45) and the time interval is 5 minutes, then n = 3, meaning the preset time period has four time nodes: 10:30, 10:35, 10:40, and 10:45. In some embodiments, the value of 'n' can also be obtained by non-equally dividing the preset time period. For example, if the preset time period is 15 minutes (e.g., 10:30 to 10:45) and the time intervals are 2 minutes, 3 minutes, 5 minutes, and 5 minutes respectively, then the time nodes are 10:30, 10:32, 10:35, 10:40, and 10:45. In some embodiments, the time interval can be set based on actual monitoring needs.

[0121] In some embodiments, the torque state assessment model 220 can be trained based on a large number of first training samples with first labels. The first training samples may include the rotational speed of the sample screen and the torque vector sequence of the sample blades, and the first label may include the actual abnormal torque location corresponding to the first training sample. The first training samples can be determined based on historical data, and the first label can be determined based on methods such as manual annotation.

[0122] In some embodiments, the first training sample can be input into an initial torque state evaluation model, parameters of the initial torque state evaluation model are updated through training iterations until the trained model meets a preset training condition, and a trained torque state evaluation model is obtained. The preset training condition can be that a loss function is less than a threshold, convergence, or a training period reaches a threshold. In some embodiments, the method of iteratively updating the model parameters can include a conventional model training method such as stochastic gradient descent.

[0123] In some embodiments, the sludge thickener can further include a user terminal. The user terminal refers to a device or apparatus for realizing interaction with a user. For example, the user terminal can include an operation panel, a smartphone, a tablet computer, and the like.

[0124] In some embodiments, the controller is in communication connection with the user terminal, and when the blade torque of the screw blade of a certain section of the sub-screw is abnormal or the abnormal torque position is determined, the controller can generate a control instruction to control the user terminal to issue a warning and remind the user to replace the section of the sub-screw. The form of the warning includes but is not limited to text, graphics, sound, and the like.

[0125] In some embodiments of the present specification, the trained model can more accurately determine the abnormal torque position, thereby realizing accurate warning.

[0126] In some embodiments, the sensing system further includes a sewage concentration detector arranged outside the screen. In some embodiments, the controller can be further configured to determine whether the screen is damaged based on the sewage concentration outside the screen.

[0127] The sewage concentration detector is a device or instrument for real-time monitoring and recording the sewage concentration. In some embodiments, the controller is in communication connection with the sewage concentration detector to obtain the sewage concentration.

[0128] In some embodiments, the controller can determine whether the screen is damaged according to whether the change value of the sewage concentration within a preset time period exceeds a concentration change threshold. For example, when the change value of the sewage concentration within the preset time period exceeds the concentration change threshold, it indicates that the screen has been damaged. The concentration change threshold refers to the maximum value of the change value of the sewage concentration within the preset time period. The concentration change threshold can be a preset value, an empirical value, or an experimental value, etc.

[0129] In some embodiments of the present specification, the sewage concentration outside the screen is obtained by arranging the sewage concentration detector outside the screen, and whether the screen is damaged is determined based on the sewage concentration outside the screen, which can realize real-time monitoring of the screen, thereby effectively ensuring the reliability of the screen and the filtering effect of the screen.

[0130] Figure 8is an exemplary schematic diagram of a service life prediction model according to some embodiments of the present specification.

[0131] In some embodiments, the controller adjusts the rotation speed of the screw and the mesh size of the screen based on the screw torque and the sludge concentration, including: determining the rotation speed of the screw and the mesh size of the screen by using a service life prediction model.

[0132] The service life prediction model refers to a model for determining the rotation speed of the screw and the mesh size of the screen. In some embodiments, the service life prediction model can be a machine learning model. For example, the service life prediction model can include one or more combinations of a convolutional neural network (CNN) model, a DNN model, or a custom model.

[0133] As shown in Figure 8 , the input of the service life prediction model 320 can include the current screw torque 311 (such as the main shaft torque or the blade torque), the historical sludge concentration sequence 312, the historical sewage concentration sequence 313, the current rotation speed of the screw 314, the current mesh size of the screen 315, and the current dosage of the flocculant 316, and the output of the service life prediction model 320 can include the service life of the screw 331 and the service life of the screen 332.

[0134] The current screw torque 311 refers to the torque at the main shaft or screw blade of the screw under the current operating state. In some embodiments, the current screw torque can be at least one of the main shaft torque and the blade torque, which can be determined based on the setting position of the screw torque detector. In some embodiments, the current screw torque 311 can be obtained based on the screw torque detector.

[0135] The historical sludge concentration sequence 312 refers to a sequence composed of sludge concentrations obtained by the sludge concentration detector in a preset time period in chronological order. In some embodiments, the historical sludge concentration sequence 312 can be obtained based on historical data.

[0136] The historical sewage concentration sequence 313 refers to a sequence composed of sewage concentrations obtained by the sewage concentration detector in a preset time period in chronological order. In some embodiments, the historical sewage concentration sequence 313 can be obtained based on historical data.

[0137] The current rotation speed of the screw 314 refers to the rotation speed of the screw under the current operating state. In some embodiments, the current rotation speed of the screw 314 can be calculated according to the output rotation speed of the driving device and the reduction ratio of the reduction gearbox.

[0138] The current screen mesh size 315 refers to the mesh size of the screen in the current operating state. In some embodiments, the current screen mesh size 315 can be determined based on a second lookup table. The second lookup table can be constructed based on the mesh size of the first screen, the mesh size of the second screen, and the historical rotation speed of the screen (such as the first screen or the second screen).

[0139] The current flocculant drug usage 316 refers to the amount of flocculant added in the current state. In some embodiments, the current flocculant drug usage can be obtained based on manual input.

[0140] In some embodiments, the service life prediction model 320 can be trained based on a large number of second training samples with second labels. The second training samples can include the current screw torque of the sample, the sample historical sludge concentration sequence, the sample sewage concentration sequence, the current rotation speed of the sample screw, the current mesh size of the sample screen, and the current flocculant drug usage of the sample. The second label is the actual service life of the screw and the actual service life of the screen corresponding to the second training sample. The second training sample can be obtained based on historical data, and the second label can be determined based on manual annotation or the like. It should be noted that the training method of the service life prediction model is similar to that of the torque state evaluation model, and this specification will not be repeated here.

[0141] In some embodiments, the input of the service life prediction model can also include the usage frequency of the blowing device 341, the usage frequency of the flushing water 342, and the consumption of compressed gas 343 and the consumption of flushing water 344. In some embodiments, the second training sample can also include the usage frequency of the blowing device, the usage frequency of the flushing water, the consumption of compressed gas, and the consumption of flushing water.

[0142] In some embodiments of the present specification, the trained service life prediction model can effectively improve the accuracy of the prediction result. In addition, by taking the usage frequency of the blowing device, the usage frequency of the flushing water, and the consumption of compressed gas and the consumption of flushing water as the input of the model, the influence of the use of the blowing device and the flushing water on the service life of the screw and the screen is considered comprehensively, which can further improve the accuracy of the prediction result.

[0143] In some embodiments, under the condition of meeting the preset filtering condition, based on the service life of the screw and the service life of the screen, the controller can set the parameter setting combination (including the rotation speed of the screw, the mesh size of the screen, etc.) corresponding to the maximum superimposed service life as the preferred parameter, and adjust the corresponding parameters of the sludge thickener based on the preferred parameter. The superimposed service life refers to the value obtained by superimposing and summing the service life of the screw and the service life of the screen.

[0144] The parameter setting combination refers to a combination of multiple different parameters inputted when predicting the service life of each screw and the service life of the screen by using the service life prediction model. It can be understood that the parameters in the parameter setting combination include the rotation speed of the screw, the mesh size of the screen, the dosage of the flocculant, and the like.

[0145] The preset filtration condition refers to a pre-set filtration requirement. In some embodiments, the preset filtration condition can include that the moisture content of the concentrated sludge is lower than a moisture content threshold, the concentration efficiency of the sludge thickener per unit time meets an efficiency threshold, and the like.

[0146] It can be understood that the longer the service life of the screw and the screen, the lower the operating cost of the sludge thickener. In some embodiments, based on the service life of the screw and the service life of the screen, the controller can also convert the service life of the screw and the service life of the screen into screw replacement cost and screen replacement cost respectively, and determine the preferred parameter by using a pre-designed calculation rule, and adjust the corresponding parameter of the sludge thickener based on the preferred parameter.

[0147] In some embodiments, the service life of the screw and the service life of the screen can be converted into the screw replacement cost and the screen replacement cost respectively by using a pre-set conversion rule. The pre-set conversion rule refers to a rule for converting the service life of the screw and the screen into the replacement cost of the screw and the screen. In some embodiments, the pre-set conversion rule can include replacement cost = conversion factor * service life. For example, screw replacement cost = conversion factor of screw * service life of screw. In some embodiments, the conversion factor is negatively correlated with the service life. The longer the service life, the smaller the conversion factor. It should be noted that the conversion factor of the screw and the conversion factor of the screen can be the same or different.

[0148] The pre-designed calculation rule refers to a rule for calculating the operating cost of the sludge thickener. In some embodiments, the pre-designed calculation rule can include operating cost = screw replacement cost + screen replacement cost + dosage of flocculant + consumption of compressed gas + consumption of flushing water.

[0149] In some embodiments, the controller can select the parameter setting combination corresponding to the lowest operating cost as the preferred parameter.

[0150] In some embodiments, based on the preferred parameter, the controller can adjust the corresponding parameter of the sludge thickener by sending a corresponding control instruction. For example, the controller can send a screen rotation speed adjustment instruction to adjust the rotation speed of the screen, and the like. In some embodiments, based on the preferred parameter, the corresponding parameter of the sludge thickener can also be adjusted manually by artificial.

[0151] Some embodiments of the present specification determine the service life of the screw and the service life of the screen by using the service life prediction model, and determine the rotation speed of the screw and the mesh size of the screen from the cost perspective based on the service life of both, which is conducive to saving the operation cost of the sludge thickener on the basis of ensuring the thickening effect.

[0152] In some embodiments, the controller can also be configured to adjust the jet angle and the jet pressure of the air blowing device based on the sludge concentration, the sewage concentration, and the mesh size of the screen. In some embodiments, adjusting the jet angle and the jet pressure of the air blowing device based on the sludge concentration, the sewage concentration, and the mesh size of the screen includes: in response to a mutation in the sludge concentration and / or the sewage concentration, adjusting the jet angle of the air blowing device to 0°, i.e., the jet direction is perpendicular to the direction of the screen; and in response to the mesh size of the screen being greater than the size threshold, increasing the jet pressure of the air blowing device.

[0153] In some embodiments, when at least one of the sludge concentration and / or the sewage concentration mutates, it indicates that the screen may be severely clogged, at which time the controller can issue a control instruction (such as a jet angle adjustment instruction) to adjust the jet angle of the air blowing device to 0° (i.e., the jet direction is perpendicular to the direction of the screen) to increase the pressure of the jetted compressed gas on the screen, thereby causing the sludge to detach from the screen and ensuring the filtering effect of the screen.

[0154] The size threshold refers to a pre-set size value. The size threshold can be an empirical value, an experimental value, etc.

[0155] The jet pressure refers to the pressure of the compressed gas jetted by the air blowing device on the screen. In some embodiments, the jet pressure is related to the jet speed and the jet angle. For example, at the same jet angle, the faster the jet speed, the greater the jet pressure. For another example, at the same jet speed, the jet pressure when the jet angle is 0° is greater than the jet pressure when the jet angle is the maximum jet angle.

[0156] In some embodiments, when the mesh size of the screen is greater than the size threshold, if the jet pressure of the air blowing device is too small, the cleaning strength of the compressed gas jetted by the air blowing device on the screen is not enough, at which time the controller can issue a control instruction (such as a jet pressure increase instruction) to increase the jet pressure of the air blowing device. In some embodiments, the increase value of the jet pressure can be determined based on a pre-set table.

[0157] Some embodiments of the present specification adjust the jet angle and the jet pressure of the air blowing device based on the sludge concentration, the sewage concentration, and the mesh size of the screen, which can effectively ensure the filtering effect of the screen and improve the thickening efficiency of the sludge thickener.

[0158] Figure 9 is an exemplary schematic diagram of a thickening efficiency prediction model according to some embodiments of the present specification.

[0159] In some embodiments, the controller may also determine the thickening efficiency based on the screw rotation speed, the screen mesh size, and the sludge supply rate using a thickening efficiency prediction model; determine the preferred parameters based on the thickening efficiency; and adjust the corresponding parameters of the sludge thickener based on the preferred parameters.

[0160] A thickening efficiency prediction model is a model used to determine the thickening efficiency of a sludge thickener. In some embodiments, the thickening efficiency prediction model can be a machine learning model. For example, the thickening efficiency prediction model may include one or more combinations of CNN models, DNN models, or custom models.

[0161] like Figure 9 As shown, the inputs to the thickening efficiency prediction model 420 may include the screw rotation speed 411, the screen mesh size 412, and the sludge supply amount 413, and the output of the thickening efficiency prediction model 420 may include the thickening efficiency 430.

[0162] The sludge supply rate 413 refers to the amount of sludge entering the reactor. In some embodiments, the sludge supply rate 413 can be obtained in various ways. Exemplary methods include, but are not limited to, installing a sludge flow detector at the sludge inlet and obtaining the sludge supply rate through detection by the sludge flow detector.

[0163] In some embodiments, the thickening efficiency prediction model 420 can be trained based on a large number of third training samples with third labels. The third training samples may include the rotational speed of the sample screw, the mesh size of the sample screen, and the sample sludge supply rate. The third label may include the actual thickening efficiency corresponding to the third training sample. The third training samples can be determined based on historical data, and the third label can be determined based on manual annotation or other methods. It should be noted that the training method for the thickening efficiency prediction model is similar to the training method for the torque state assessment model, and will not be described in detail here.

[0164] In some embodiments, the controller can determine the screw speed, screen mesh size, and sludge supply rate as optimal parameters based on the predicted results for achieving the best thickening efficiency, and adjust the corresponding parameters of the sludge thickener based on these optimal parameters. For detailed instructions on how to adjust these parameters, please refer to [link to relevant documentation]. Figure 8 The details and related descriptions will not be repeated here.

[0165] In some embodiments of this specification, the thickening efficiency is determined by a trained thickening efficiency prediction model. The screw speed, screen mesh size, and sludge supply rate at which the thickening efficiency is optimal in the prediction results are determined as preferred parameters, and the corresponding parameters of the sludge thickener are adjusted accordingly. That is, the relevant parameters are determined from the perspective of thickening efficiency, which helps to improve the thickening efficiency of the sludge thickener while ensuring the thickening effect.

[0166] Having described the basic concepts, it is obvious that the above detailed disclosure is intended only as an illustration and the specification is not intended to limit the present description in any way. Although the present description has been described with a certain degree of particularity, it is to be understood that various modifications, improvements and alterations can be made to the present description by those skilled in the art. Such modifications, improvements and alterations are therefore contemplated and are deemed within the spirit and scope of the present description.

Claims

1. A sludge thickener, characterized in that, It includes a reaction chamber, a drive unit, a screw, a screen, an air blowing device, an elastic unloading device, a sensing system, and a controller. The screw is disposed inside the screen, and the screen is disposed inside the reaction chamber. The reaction chamber includes a first reaction chamber, a second reaction chamber, and a third reaction chamber. The first reaction chamber is provided with a sludge inlet, and the third reaction chamber is provided with a sludge outlet. The drive device is connected to the screw, and the drive device is configured to drive the screw to rotate. The screw is configured to convey sludge by rotation; from the sludge inlet to the sludge outlet, the pitch of the screw gradually decreases and the diameter gradually increases; the screw comprises a multi-segment screw. The screen is configured to filter moisture from the sludge, and the mesh size of the screen is adjustable. The blowing device is configured to inject compressed gas into the screen. The flexible unloading device is configured to resiliently block the sludge outlet; The sensing system includes a screw torque detector and a sludge concentration detector; The screw torque detector is configured to acquire screw torque; multiple screw torque detectors are respectively disposed on multiple screw blades and configured to detect the blade torque of the multiple screw blades respectively; The sludge concentration detector is configured to acquire sludge concentration; The controller is configured to: Based on the screw torque and the sludge concentration, adjust the screw rotation speed, the screen mesh size, and the air jet angle of the blowing device; as well as An early warning is issued in response to an abnormality in the blade torque of at least one of the screw blades in the sub-screw.

2. The sludge thickener according to claim 1, characterized in that, The screen includes a first screen and a second screen, which can slide relative to each other to adjust the mesh size of the screen.

3. The sludge thickener according to claim 2, characterized in that, It also includes a screen drive device, which is connected to the first screen and / or the second screen to drive the first screen and / or the second screen to rotate.

4. The sludge thickener according to claim 1, characterized in that, The blowing device includes an angle adjustment mechanism configured to adjust the spray angle of the blowing device.

5. The sludge thickener according to claim 1, characterized in that, The second reaction chamber has a funnel-shaped opening, which is connected to the air blowing device.

6. The sludge thickener according to claim 1, characterized in that, The elastic unloading device includes an elastic element and a stop block, the stop block blocking the sludge outlet by the elastic force of the elastic element.

7. The sludge thickener according to claim 6, characterized in that, The elastic element is a gas spring.

8. The sludge thickener according to claim 1, characterized in that, It also includes a feeding device, which includes a dosing tank configured to adjust the amount of flocculant used.

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