A residue recovery device for efficient dairy product production

Abstract

The present invention relates to the technical field of milk product recovery, and discloses a residue recovery device for efficient milk product production, comprising a milk residue filter press, a descent rate control module, and a controller; a pressure regulating component is provided in the milk residue filter press, and the pressure regulating component is used to apply an adjustable extrusion pressure to the filter belt wound on the pressing roller of the milk residue filter press; the descent rate control module predicts and calculates the dehydration capacity of the milk residue through the dehydration state during the filtration process, and calculates the control amount of the extrusion force based on the predicted dehydration capacity, so that the pressure regulating component can output a suitable extrusion force; the pressure regulating component includes multiple groups of individually adjustable extrusion mechanisms. In the present invention, the descent rate control module monitors the dregs cake thickness descent rate in real time, and dynamically adjusts the extrusion force of the extrusion mechanism in combination with the influencing characteristic factors calculated by the prediction algorithm unit, thereby achieving differentiated pressure adaptation for different types of milk product residues and improving the adaptability and dehydration effect of multiple materials.

Description

Technical Field

[0001] The invention belongs to the technical field of dairy product recovery, and in particular relates to a residue recovery device for efficient dairy product production. Background Art

[0002] Dairy products, also known as cream products, refer to various foods made from cow's milk or goat's milk and their processed products as the main raw materials, with or without appropriate amounts of vitamins, minerals and other auxiliary materials, under the conditions required by the standards. The residues of dairy products can be used as plant fertilizers or industrial raw materials after recycling. The residues of dairy products contain a large amount of water, so the residues need to be dehydrated when recycled.

[0003] Different types of dairy residues, such as yogurt and cheese residues, have significantly different physical properties, including varying particle size, viscosity, and density. Traditional belt filter presses typically use a fixed pressure for dehydration, unable to flexibly adjust the pressure based on the characteristics of the residue. This results in incomplete dehydration of dairy residues and reduced recovery efficiency. Furthermore, as the filtration process progresses, the porosity and pressure-to-density ratio of the filter cake dynamically change as water is continuously squeezed out of the residue, making dehydration quality unstable and making it difficult to meet the high-quality residue recovery requirements required for efficient dairy production. Therefore, a dairy residue recovery device with automatic pressure adjustment is proposed to improve dehydration quality and recovery efficiency. Summary of the Invention

[0004] In response to the above situation, in order to solve the shortcomings of the existing technology, that is, different types of dairy residues have large differences in physical properties, traditional filter press devices cannot flexibly adjust the pressure values ​​at different positions according to the properties of the milk residues, and the dehydration quality is poor when recovering dairy residues, an efficient residue recovery device for dairy product production is proposed.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a residue recovery device for efficient dairy product production, comprising:

[0006] A milk residue filter press, wherein a pressure regulating assembly is provided in the milk residue filter press, and the pressure regulating assembly is used to apply an adjustable squeezing force to the filter belt wound on the pressing roller of the milk residue filter press;

[0007] The decline rate control module includes a thickness detection unit, a prediction algorithm unit and a pressure parameter optimization unit. The thickness detection unit is used to detect the thickness of the cake on both sides of the pressing roller during the milk cake filtration process and calculate the decline rate of the cake thickness. The prediction algorithm unit calculates the control amount of the influencing characteristic factor and the extrusion force according to the decline rate of the cake thickness. The parameter optimization unit updates the extrusion force and outputs the parameters according to the output parameters of the prediction algorithm unit. The influencing characteristic factor is a comprehensive parameter of the dehydration performance of the material at this moment. , which includes the material's inherent property parameters and variable property parameters that change with the filter pressing process ;

[0008] a controller, the controller receiving an adjustment instruction from the descent rate control module and controlling an output extrusion force of the pressure regulating assembly;

[0009] The pressure regulating assembly comprises a plurality of extrusion mechanisms, each of which cooperates with a pressing roller to extrude the filter belt, and the extrusion forces of the extrusion mechanisms can be adjusted individually.

[0010] As a further description of the above technical solution:

[0011] The thickness detection unit measures the thickness of the slag cake before and after squeezing through the detection mechanisms arranged on both sides of each squeezing roller;

[0012] The thickness detection unit calculates the slag cake thickness reduction rate according to the thickness A1 of the slag cake before being squeezed and the thickness A2 of the slag cake after being squeezed, and outputs the result to the prediction algorithm unit.

[0013] As a further description of the above technical solution:

[0014] The extrusion mechanism includes an extrusion drive member, a pressure roller, and a slider. The extrusion drive member is fixedly mounted on the frame of the milk residue filter press. The slider is connected to the telescopic end of the extrusion drive member via an extrusion spring. The slider is movable on the frame. The pressure roller is rotatably connected to the slider. The pressure roller cooperates with the pressing roller to squeeze the filter belt.

[0015] The output end of the extrusion drive member is provided with a pressure sensor for detecting the pressure value output by the extrusion drive member.

[0016] As a further description of the above technical solution:

[0017] The prediction algorithm unit determines the dehydration state of the milk residue according to the residue cake thickness reduction rate parameter obtained by the thickness detection unit;

[0018] When the dehydration state of the milk residue is within a preset range, the pressure regulating component maintains the extrusion force value.

[0019] As a further description of the above technical solution:

[0020] When the dehydration status of the milk residue is not within the preset range:

[0021] The prediction algorithm unit predicts the influencing characteristic factors based on the operating state parameters of the milk residue filter press, the residue cake thickness measured by the thickness detection unit, and the output extrusion force of the pressure regulating component;

[0022] The prediction algorithm unit calculates the optimal extrusion pressure parameter based on the influencing characteristic factors based on the expected range of the slag cake thickness reduction rate as a constraint condition, and transmits it to the pressure parameter optimization unit. The pressure parameter optimization unit records the extrusion pressure parameter and transmits it to the controller, which issues an instruction to adjust the extrusion pressure of the pressure adjustment component.

[0023] As a further description of the above technical solution:

[0024] The thickness detection unit is further used to obtain the thickness A2 after pressure adjustment, and calculate the thickness reduction rate of the residue cake based on the thickness A2 after pressure adjustment. The prediction algorithm unit determines the dehydration state of the milk residue after pressure adjustment.

[0025] Wherein, when the dehydration state of the milk residue after the pressure adjustment is within the preset range, the pressure adjustment component maintains the extrusion force value;

[0026] When the dehydration state of the milk residue after the pressure adjustment is not within the preset range, the prediction algorithm unit re-predicts the influencing characteristic factors based on the thickness of the residue cake and the extrusion force after the pressure adjustment.

[0027] As a further description of the above technical solution:

[0028] The milk residue filter press comprises an upper filter press assembly and a lower filter press assembly, wherein the upper filter press assembly comprises an upper filter belt and a roller assembly for driving the upper filter belt to rotate; the lower filter press assembly comprises a lower filter belt and a roller assembly for driving the lower filter belt to rotate;

[0029] A plurality of pressing rollers are provided at the overlapping portion of the upper filter belt and the lower filter belt, wherein each pressing roller is provided with an extrusion mechanism matched therewith.

[0030] As a further description of the above technical solution:

[0031] The milk residue filter press also includes an upper tensioning cylinder cooperating with the upper filter belt and a lower tensioning cylinder cooperating with the lower filter belt. A pressure sensor is provided on the upper tensioning cylinder for detecting the tensioning force of the upper tensioning cylinder and the lower tensioning cylinder.

[0032] As a further description of the above technical solution:

[0033] The milk residue filter press is provided with a filter belt driving member for driving the upper filter belt and the lower filter belt to rotate.

[0034] As a further description of the above technical solution:

[0035] The detection mechanism includes a retractable connecting rod and a rotatable cross rod. The connecting rod is retractably mounted on the frame, and the cross rod rotates on the connecting rod. The cross rod is attached to the outer diameter of the pressing roller and the filter belt. A position sensor is provided on the connecting rod for detecting the elongation of the connecting rod.

[0036] The beneficial effects achieved by the present invention using the above structure are as follows:

[0037] (1) In the present invention, the reduction rate of the cake thickness is monitored in real time by the reduction rate control module. Combined with the influencing characteristic factors calculated by the prediction algorithm unit, the extrusion force of the extrusion mechanism can be dynamically adjusted according to the dehydration capacity of the residue when the dairy residue is recovered, thereby achieving differentiated pressure adaptation for different types of dairy residues, avoiding the problem of incomplete dehydration or excessive extrusion under a fixed pressure mode, and improving the adaptability and dehydration quality of multiple materials.

[0038] (2) In the present invention, the pressure regulating assembly sets an independent squeezing mechanism for each pressing roller, and the thickness detection unit independently monitors and feedback controls the thickness reduction rate of the slag cake in each pressing section, dividing the filtration process into multiple dehydration stages. A lower pressure can be used in the initial stage to prevent pore collapse, and the pressure can be gradually increased in the middle and late stages to accelerate dehydration. This not only avoids the decrease in permeability caused by excessive dehydration, but also solves the problem of low efficiency caused by excessive dehydration, thereby improving the processing efficiency while ensuring the dehydration quality;

[0039] (3) The decline rate control module adjusts the comprehensive parameters of the dehydration performance of milk residue at different parts of the filter press. Decompose into material intrinsic property parameters with small changes and variable property parameters with large variations , and predict and calculate them separately, and then use the predicted comprehensive parameters of dehydration performance Calculate the output extrusion force of the pressure regulating component to ensure that the dehydration process is always in the high-efficiency range, significantly reducing the final moisture content of the residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the three-dimensional structure of a residue recovery device for efficient dairy product production proposed by the present invention;

[0041] Figure 2 This is a partial structural diagram of the residue recovery device for dairy product production proposed by the present invention;

[0042] Figure 3The planar operation of the residue recovery device for dairy product production proposed by the present invention Figure 1 ;

[0043] Figure 4 It is a structural diagram of the extrusion mechanism;

[0044] Figure 5 The planar operation of the residue recovery device for dairy product production proposed by the present invention Figure 2 ;

[0045] Figure 6 It is a structural diagram of the pressure regulating component;

[0046] Figure 7 Schematic diagram of the working principle of the residue recovery device for dairy product production;

[0047] Figure 8 This is the workflow diagram of the descent rate control module;

[0048] Figure 9 It is a structural diagram of the descent rate control module;

[0049] Figure 10 This is the workflow diagram of the prediction algorithm unit.

[0050] Legend:

[0051] 11. First extrusion mechanism; 12. Second extrusion mechanism; 13. Third extrusion mechanism; 101. Extrusion drive; 102. Pressing roller; 103. Sliding block; 104. Extrusion spring; 21. First thickness measuring rod; 22. Second thickness measuring rod; 211. Cross bar; 212. Connecting rod; 31. Upper filter belt; 32. Lower filter belt; 33. First pressing roller; 34. Second pressing roller; 35. Third pressing roller; 36. Upper tensioning cylinder; 37. Lower tensioning cylinder; 38. Filter belt drive; 39. Feeding port. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0054] In order to solve the problem that the traditional filtering device cannot flexibly adjust the pressure value according to the properties of the dairy residue, the dehydration effect is poor when recovering the residues produced by different types of dairy products, and the subsequent recovery cost increases, an efficient residue recovery device for dairy product production is designed in the embodiment of the present application. Figures 1-10 As shown, it includes a milk residue filter press, a descent rate control module and a controller; a pressure regulating component is provided in the milk residue filter press, and the pressure regulating component is used to apply an adjustable extrusion pressure to the filter belt wound on the pressing roller of the milk residue filter press; the descent rate control module includes a thickness detection unit, a prediction algorithm unit and a pressure parameter optimization unit, wherein the thickness detection unit is used to detect the thickness of the residue cake on both sides of the pressing roller during the milk residue filtration process and calculate the descent rate of the residue cake thickness, the prediction algorithm unit calculates the control amount affecting the characteristic factor and the extrusion pressure according to the descent rate of the residue cake thickness, and the parameter optimization unit updates the extrusion pressure and outputs the parameters according to the output parameters of the prediction algorithm unit, wherein the influencing characteristic factor is the comprehensive parameter of the dehydration performance of the material at this moment. , which includes the material's inherent property parameters and variable property parameters that change with the filter pressing process ; The controller receives the adjustment instructions from the descent rate control module and controls the output extrusion pressure of the pressure adjustment component; The pressure adjustment component includes multiple groups of extrusion mechanisms, each group of extrusion mechanisms cooperates with a pressing roller to extrude the filter belt, and the extrusion pressure of the extrusion mechanism can be adjusted separately.

[0055] In this way, when recycling dairy product residues, the prediction algorithm unit can be used to predict the dehydration state of the residue, and the output extrusion pressure of the pressure regulating component can be regulated according to the predicted dehydration state, so that the extrusion pressure can be adapted to the dehydration properties of the residue, thereby ensuring the dehydration effect of the dairy product residue. When processing different types or batches of dairy product residues, it can be adjusted automatically to ensure the dehydration effect of the dairy product residue, thereby reducing the cost of subsequent recycling and processing.

[0056] Moreover, multiple groups of extrusion mechanisms can independently apply adjustable extrusion pressure, divide the pressing area of ​​the filter belt into different sections and adjust the pressure values ​​respectively, so that the milk residue can obtain a suitable thickness reduction rate during the filtration process, and avoid the phenomenon of pore collapse and permeability decrease caused by the milk residue being dehydrated too quickly during the filtration process, thereby ensuring the dehydration effect of the milk residue, and also preventing the milk residue from being dehydrated too slowly, resulting in low processing efficiency. The independent adjustment of each group of extrusion mechanisms enables the entire device to process dairy residues of different properties, thereby ensuring the stability and reliability of residue recovery.

[0057] In addition, each set of extrusion mechanisms can be adjusted individually and cooperate with the prediction algorithm unit to adjust the comprehensive parameters of the dehydration performance of the milk residue in different pressing sections. Prediction is performed, which includes the inherent property parameters of the curd and variable property parameters that change with the filter pressing process , it can accurately control the dehydration effect of milk residue in different pressing sections, thereby ensuring the dehydration effect of milk residue in each stage, and then improving the comprehensive dehydration effect of dairy residue in the recycling process.

[0058] A residue recovery device for efficient dairy product production in an embodiment of the present application can be used for the recovery and dehydration of dairy product residues, specifically but not limited to the recovery of residues of dairy products such as milk slices, cheese, and milk cakes.

[0059] In one embodiment, see Figure 3 、 Figure 4 and Figure 6 The thickness detection unit measures the thickness A1 of the slag cake before squeezing and the thickness A2 of the slag cake after squeezing through the detection mechanism set on both sides of each squeezing roller; the thickness detection unit calculates the slag cake thickness reduction rate based on the thickness A1 before squeezing and the thickness A2 after squeezing, and outputs the result to the prediction algorithm unit;

[0060] The milk residue filter press is provided with a thickness measuring structure at each pressing roller position, and the thickness measuring structure includes a first thickness measuring rod 21 and a second thickness measuring rod 22. The first thickness measuring rod 21 and the second thickness measuring rod 22 are both fixedly mounted on the frame. The first thickness measuring rod 21 includes a retractable connecting rod 212 and a rotatable cross bar 211. The connecting rod 212 is fixedly mounted on the frame, and the cross bar 211 rotates on the connecting rod 212. The cross bar 211 is attached to the outer diameter of the pressing roller and the filter belt. A position sensor is provided on the connecting rod 212 for detecting the elongation of the connecting rod 212. The second thickness measuring rod 22 and the first thickness measuring rod 21 have the same structural arrangement;

[0061] The first thickness measuring rod 21 and the second thickness measuring rod 22 are respectively arranged on both sides of the pressing roller and the extrusion mechanism. The first thickness measuring rod 21 is used to measure the thickness A1 of the slag cake between the upper filter belt 31 and the lower filter belt 32 before being pressed, and the second thickness measuring rod 22 is used to detect the thickness A2 of the slag cake between the upper filter belt 31 and the lower filter belt 32 after being pressed; when working, under the contraction force of the connecting rod 212, the cross bar 211 can be tightly attached to the filter belt, and the displacement sensor on the connecting rod 212 detects the expansion and contraction amount of the connecting rod 212, thereby being able to measure the thickness of the slag cake before being pressed. The second thickness measuring rod 22 adopts the same structure to measure the thickness of the slag cake after being pressed.

[0062] In one embodiment, Figure 2 — Figure 4 、 Figure 6 The extrusion mechanism includes an extrusion drive member 101, a pressure roller 102 and a slider 103. The extrusion drive member 101 is fixedly mounted on the frame of the milk residue filter press. An extrusion spring 104 is connected between the slider 103 and the telescopic end of the extrusion drive member 101. The slider 103 can move on the frame, and the pressure roller 102 is rotatably connected to the slider 103. A pressure sensor is provided at the output end of the extrusion drive member 101 for detecting the pressure value output by the extrusion drive member 101.

[0063] The extrusion drive 101 receives instructions from the controller and changes the output pressure. The telescopic end of the extrusion drive 101 pushes the extrusion spring 104, so that the slider 103 can move toward the pressing roller, thereby adjusting the extrusion force between the pressing roller 102 and the pressing roller. The pressing roller 102 is a hollow barrel structure used to assist drainage. There are filter holes on the circumference of the pressing roller 102 to facilitate water outflow. When the output pressure of the telescopic end of the extrusion drive 101 changes, the extrusion force between the pressing roller 102 and the pressing roller also changes accordingly.

[0064] Reference Figure 7 — Figure 10 The prediction algorithm unit determines the dehydration state of the milk residue based on the cake thickness reduction rate parameter obtained by the thickness detection unit; when the milk residue dehydration state is not within the preset range, the prediction algorithm unit predicts the influencing characteristic factor based on the operating state parameter of the milk residue filter press, the cake thickness measured by the thickness detection unit, and the output extrusion pressure of the pressure regulating component; the prediction algorithm unit calculates the optimal extrusion pressure parameter based on the influencing characteristic factor according to the expected range of the cake thickness reduction rate as a constraint condition, and transmits it to the pressure parameter optimization unit. The pressure parameter optimization unit records the extrusion pressure parameter and transmits it to the controller, which issues an instruction to adjust the extrusion pressure of the pressure regulating component;

[0065] The thickness detection unit is also used to obtain the thickness A2 after the pressure is adjusted, and the thickness reduction rate of the cake is calculated based on the thickness A2 after the pressure is adjusted. The prediction algorithm unit determines the dehydration state of the milk residue after the pressure is adjusted; when the dehydration state of the milk residue after the pressure is adjusted is within a preset range, the pressure adjustment component maintains the extrusion force value, wherein a different preset range is set for each pressing roller segment; when the dehydration state of the milk residue after the pressure is adjusted is not within the preset range, the prediction algorithm unit re-predicts the influencing characteristic factors based on the cake thickness and the extrusion force after the pressure is adjusted.

[0066] Among them, reference Figure 10 , the prediction algorithm unit includes the following steps:

[0067] S10, setting a desired reduction rate interval of the residue cake, obtaining the working state parameters of the milk residue filter press, the output squeezing force of the squeezing mechanism, the thickness A1 of the milk residue before squeezing, and the thickness A2 of the milk residue after squeezing;

[0068] S20, predicting influencing characteristic factors based on the working state parameters of the milk residue filter press, the output extrusion force of the extrusion mechanism, and the thickness of the residue cake;

[0069] S30, calculating the magnitude of the extrusion force that the extrusion mechanism needs to output based on the predicted influencing characteristic factors;

[0070] S40, after the extrusion mechanism outputs a new extrusion force, a new extrusion thickness A2 is obtained;

[0071] S50, determining whether the slag cake thickness reduction rate reaches the expected range. If not, updating the extrusion pressure value and the thickness A2 value and returning to S20;

[0072] S60, when the slag cake thickness reduction rate reaches the desired range, the extrusion mechanism maintains the current extrusion pressure;

[0073] Among them, in S20, the influencing characteristic factor is the comprehensive parameter of the dehydration performance of the material at this moment , which includes the material's inherent property parameters and variable property parameters that change with the filter pressing process ;

[0074] Among them: Comprehensive parameters of dehydration performance in different parts The prediction calculation method is:

[0075] (1)

[0076] Among them, ɑ is the weight ratio of the material's inherent property parameters to the comprehensive parameters of dehydration performance, which changes with the number of pressing rollers passed during the pressing process and is a preset value;

[0077] Intrinsic property parameters of materials After simplifying the model, we adopt:

[0078] Conduct simulation and prediction;

[0079] in, is the reduction rate of milk residue thickness ;

[0080] and k are constant coefficients, C and is a constant;

[0081] Indicates the comprehensive influence of the material properties (such as particle size, viscosity, etc.) on the dehydration capacity;

[0082] Variable material properties After simplifying the model, we adopt:

[0083] Conduct simulation and prediction;

[0084] Among them, N is the number of pressing rollers passed, P is the tensioning force of the tensioning cylinder, and are all constant coefficients, is the reduction rate of milk residue thickness ; It indicates the comprehensive influence of changes in porosity, pressure-density ratio, compressibility, etc. of materials during the dehydration process on the dehydration capacity;

[0085] Substituted into formula (1), the comprehensive parameters of the dehydration performance of the material at this moment are obtained: ;

[0086] The comprehensive parameters of dehydration performance Indicates the capacity of the filter residue at this moment, and its relationship with the extrusion pressure is expressed as:

[0087] (2)

[0088] in is a constant coefficient, and the average value of the expected interval of the decline rate is Substituting into formula (2), we can solve the extrusion force F value and then obtain the control value of the extrusion force;

[0089] The prediction algorithm unit is based on the comprehensive parameters of dehydration performance The control amount of the extrusion pressure is calculated and the output extrusion pressure of the extrusion mechanism is changed, so that the milk residue is in the optimal dehydration range during the dehydration process, avoiding the phenomenon of pore collapse and permeability decrease caused by excessive dehydration speed of the milk residue during the filtration process, thereby ensuring the dehydration effect of the milk residue, and also preventing the milk residue from being dehydrated too slowly and causing low processing efficiency.

[0090] Reference Figure 8 , the descent rate control module includes the following steps:

[0091] B10, the thickness detection unit obtains the thickness A1 of the slag cake before pressing and the thickness A2 of the slag cake after pressing, and calculates the thickness decrease rate of the slag cake in the current state;

[0092] B20, the prediction algorithm unit determines whether the current slag cake thickness decrease rate is within the preset range. If the current slag cake thickness decrease rate is within the preset range, the extrusion mechanism maintains the current output extrusion force;

[0093] B30, if the current slag cake thickness reduction rate is not within the preset range, the prediction algorithm unit calculates the influencing characteristic factor according to the milk cake thickness reduction rate, and calculates the control amount of the extrusion pressure according to the influencing characteristic factor;

[0094] B40, the pressure parameter optimization unit records the new extrusion pressure control value and drives the pressure adjustment component through the controller to change the output extrusion pressure value;

[0095] B50, the thickness detection unit obtains the new thickness of the slag cake after pressing A2 and returns to B10;

[0096] In one embodiment, referring to Figures 1-6 The milk residue filter press includes an upper filter press assembly and a lower filter press assembly. The upper filter press assembly includes an upper filter belt 31 and a roller assembly for driving the upper filter belt 31 to rotate; the lower filter press assembly includes a lower filter belt 32 and a roller assembly for driving the lower filter belt 32 to rotate;

[0097] A plurality of pressing rollers are provided at the overlapping portion of the upper filter belt 31 and the lower filter belt 32, wherein each pressing roller is provided with an extrusion mechanism cooperating therewith; the milk residue filter press further comprises an upper tensioning cylinder 36 cooperating with the upper filter belt 31 and a lower tensioning cylinder 37 cooperating with the lower filter belt 32, and pressure sensors are provided on both the upper tensioning cylinder 36 and the lower tensioning cylinder 37; the milk residue filter press is provided with a filter belt drive 38 for driving the upper filter belt 31 and the lower filter belt 32 to rotate, and the filter belt drive 38 drives the rollers of the upper filter belt 31 and the lower filter belt 32 to rotate respectively, and the rotation directions of the rollers of the upper filter belt 31 and the lower filter belt 32 are opposite;

[0098] In a specific embodiment, three groups of pressing rollers are provided, namely a first pressing roller 33, a second pressing roller 34, and a third pressing roller 35, and three groups of first squeezing mechanisms 11, a second squeezing mechanism 12, and a third squeezing mechanism 13 are provided to cooperate with the pressing rollers; wherein the first squeezing mechanism 11 cooperates with the first squeezing roller 33, the second squeezing mechanism 12 cooperates with the second squeezing roller 34, and the third squeezing mechanism 13 cooperates with the third squeezing roller 35 to squeeze and dehydrate the milk residue in sections; the first squeezing mechanism 11, the second squeezing mechanism 12, and the third squeezing mechanism 13 can each adjust the squeezing force individually.

[0099] In order to more clearly understand the working process of a residue recovery device for efficient dairy product production in the embodiment of the present application, refer to Figures 1-10 , a specific embodiment is described below:

[0100] The residue of dairy production is poured onto the upper filter belt 31 from the discharge port 39. When the residue moves on the top of the upper filter belt 31, a part of the water is first discharged under the action of gravity. Figure 5 , the residue towards Figure 5 The left side of the middle device moves, and when the residue falls on the lower filter belt 32, it gradually moves to the right and is sandwiched between the upper filter belt 31 and the lower filter belt 32;

[0101] The upper tensioning cylinder 36 applies tension to the upper filter belt 31, and the lower tensioning cylinder 37 applies tension to the lower filter belt 32. The milk residue is sandwiched between the overlapping parts of the upper filter belt 31 and the lower filter belt 32. Under the tension of the filter belt and the squeezing action of the pressing roller, the residue is gradually dehydrated to form a relatively dry recyclable material. During the filtration process, the first squeezing mechanism 11 applies squeezing force to the filter belt wrapped around the first press roller 33, the second squeezing mechanism 12 applies squeezing force to the filter belt wrapped around the second press roller 34, and the third squeezing mechanism 13 applies squeezing force to the filter belt wrapped around the third press roller 35. The three groups of squeezing mechanisms are controlled separately, and the corresponding desired ranges are set separately for the three groups of squeezing mechanisms. This ensures that the milk residue maintains an optimal thickness reduction rate during different filtration processes, avoids premature formation of hard lumps due to excessive thickness reduction, which affects the dehydration effect, while also ensuring the dehydration efficiency of the device.

[0102] Among them, when adjusting the output extrusion pressure of the extrusion mechanism, the thickness detection unit first measures the thickness A1 between the two filter belts on one side of the pressing roller and the thickness A2 between the two filter belts after being pressed on the other side of the pressing roller, and then obtains the slag cake thickness reduction rate on a pressing roller. When the slag cake thickness reduction rate is not within the expected range, the prediction algorithm unit predicts the influencing characteristic factors of the slag cake dehydration efficiency according to the operating parameters of the device, and changes the output extrusion pressure of the extrusion mechanism according to the predicted influencing characteristic factors. After the output extrusion pressure of the extrusion mechanism is changed, the thickness detection unit obtains a new A2, and the prediction algorithm unit then judges whether the new slag cake thickness reduction rate is within the preset range based on the new A2, thereby continuously iteratively updating the output extrusion pressure of the extrusion mechanism until the slag cake thickness reduction rate on the pressing roller reaches the expected range.

[0103] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0104] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0105] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A residue recovery device for efficient dairy product production, characterized in that: include: A milk residue filter press, wherein a pressure regulating assembly is provided in the milk residue filter press, and the pressure regulating assembly is used to apply an adjustable squeezing force to the filter belt wound on the pressing roller of the milk residue filter press; The decline rate control module includes a thickness detection unit, a prediction algorithm unit and a pressure parameter optimization unit. The thickness detection unit is used to detect the thickness of the cake on both sides of the pressing roller during the milk cake filtration process and calculate the decline rate of the cake thickness. The prediction algorithm unit calculates the control amount of the influencing characteristic factor and the extrusion force according to the decline rate of the cake thickness. The parameter optimization unit updates the extrusion force and outputs the parameters according to the output parameters of the prediction algorithm unit. The influencing characteristic factor is a comprehensive parameter of the dehydration performance of the material at this moment. , which includes the material's inherent property parameters and variable property parameters that change with the filter pressing process ; a controller, the controller receiving an adjustment instruction from the descent rate control module and controlling an output extrusion force of the pressure regulating assembly; The pressure regulating assembly includes multiple groups of squeezing mechanisms, each group of squeezing mechanisms cooperates with a squeezing roller to squeeze the filter belt, and the squeezing force of the squeezing mechanisms can be adjusted individually; The thickness detection unit measures the thickness of the slag cake before and after squeezing through the detection mechanisms arranged on both sides of each squeezing roller; The thickness detection unit calculates the slag cake thickness reduction rate based on the thickness A1 of the slag cake before being squeezed and the thickness A2 of the slag cake after being squeezed, and outputs the result to the prediction algorithm unit; The comprehensive parameters of the dehydration performance The prediction calculation method is: Among them, ɑ is the weight ratio of the material's inherent property parameters to the comprehensive parameters of dehydration performance, which changes with the number of pressing rollers passed during the pressing process and is a preset value; The inherent property parameters of the material The simplified calculation model is: in, is the reduction rate of milk residue thickness , and k are constant coefficients, C and is a constant; The material variable property parameters The simplified calculation model is: Among them, N is the number of pressing rollers passed, P is the tensioning force of the tensioning cylinder, and are all constant coefficients, is the reduction rate of milk residue thickness ; The comprehensive parameters of dehydration performance It indicates the dehydration capacity of the filter residue at this moment, and its relationship with the extrusion pressure is expressed as: in is a constant coefficient, and the average value of the expected interval of the decline rate is Substituting g(η) into the formula, the extrusion pressure F value can be solved, and then the control amount of the extrusion pressure can be obtained.

2. The residue recovery device for efficient dairy product production according to claim 1, characterized in that: The extrusion mechanism includes an extrusion drive member, a pressure roller, and a slider. The extrusion drive member is fixedly mounted on the frame of the milk residue filter press. The slider is connected to the telescopic end of the extrusion drive member via an extrusion spring. The slider is movable on the frame. The pressure roller is rotatably connected to the slider. The pressure roller cooperates with the pressing roller to squeeze the filter belt. The output end of the extrusion drive member is provided with a pressure sensor for detecting the pressure value output by the extrusion drive member.

3. The residue recovery device for efficient dairy product production according to claim 2, characterized in that: The prediction algorithm unit determines the dehydration state of the milk residue according to the residue cake thickness reduction rate parameter obtained by the thickness detection unit; When the dehydration state of the milk residue is within a preset range, the pressure regulating component maintains the extrusion force value.

4. The residue recovery device for efficient dairy product production according to claim 3, characterized in that: When the dehydration status of the milk residue is not within the preset range: The prediction algorithm unit predicts the influencing characteristic factors based on the operating state parameters of the milk residue filter press, the residue cake thickness measured by the thickness detection unit, and the output extrusion force of the pressure regulating component; The prediction algorithm unit calculates the optimal extrusion pressure parameter based on the influencing characteristic factors based on the expected range of the slag cake thickness reduction rate as a constraint condition, and transmits it to the pressure parameter optimization unit. The pressure parameter optimization unit records the extrusion pressure parameter and transmits it to the controller, which issues an instruction to adjust the extrusion pressure of the pressure adjustment component.

5. The residue recovery device for efficient dairy product production according to claim 4, characterized in that: The thickness detection unit is further used to obtain the thickness A2 after pressure adjustment, and calculate the thickness reduction rate of the residue cake based on the thickness A2 after pressure adjustment. The prediction algorithm unit determines the dehydration state of the milk residue after pressure adjustment. Wherein, when the dehydration state of the milk residue after the pressure adjustment is within the preset range, the pressure adjustment component maintains the extrusion force value; When the dehydration state of the milk residue after the pressure adjustment is not within the preset range, the prediction algorithm unit re-predicts the influencing characteristic factors based on the thickness of the residue cake and the extrusion force after the pressure adjustment.

6. The residue recovery device for efficient dairy product production according to claim 5, characterized in that: The milk residue filter press comprises an upper filter press assembly and a lower filter press assembly, wherein the upper filter press assembly comprises an upper filter belt and a roller assembly for driving the upper filter belt to rotate; the lower filter press assembly comprises a lower filter belt and a roller assembly for driving the lower filter belt to rotate; A plurality of pressing rollers are provided at the overlapping portion of the upper filter belt and the lower filter belt, wherein each pressing roller is provided with an extrusion mechanism matched therewith.

7. The residue recovery device for efficient dairy product production according to claim 6, characterized in that: The milk residue filter press also includes an upper tensioning cylinder cooperating with the upper filter belt and a lower tensioning cylinder cooperating with the lower filter belt. A pressure sensor is provided on the upper tensioning cylinder for detecting the tensioning force of the upper tensioning cylinder and the lower tensioning cylinder.

8. The residue recovery device for efficient dairy product production according to claim 7, characterized in that: The milk residue filter press is provided with a filter belt driving member for driving the upper filter belt and the lower filter belt to rotate.

9. The residue recovery device for efficient dairy product production according to claim 8, characterized in that: The detection mechanism includes a retractable connecting rod and a rotatable cross rod. The connecting rod is retractably mounted on the frame, and the cross rod rotates on the connecting rod. The cross rod is attached to the outer diameter of the pressing roller and the filter belt. A position sensor is provided on the connecting rod for detecting the elongation of the connecting rod.

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