A constant temperature control method, device and storage medium in a feed production process

Abstract

The application provides a constant temperature control method and device in a feed production process and a storage medium. Multiple air inlets are arranged on the top of a horizontal drying cylinder, and an air outlet is arranged in the middle of the top of the horizontal drying cylinder. The method comprises the following steps: constructing a space temperature distribution model in the horizontal drying cylinder, and dividing the overall space in the horizontal drying cylinder into multiple subspaces in the space temperature distribution model; continuously changing and adjusting parameters of the multiple air inlets within a parameter adjustment range of the multiple air inlets, so as to track temperature changes of each subspace in real time, thereby obtaining a function corresponding relationship between each subspace and the adjustment parameters of the multiple air inlets; when the horizontal drying cylinder is in a running state, continuously collecting real-time space temperature distribution conditions in the horizontal drying cylinder, so as to adjust the temperature of each subspace in real time, and make each subspace be in a target temperature interval. The application can quickly realize constant temperature control of the entire drying cylinder.

Description

Technical Field

[0001] This invention relates to the field of feed production technology, and in particular to a method, equipment and storage medium for constant temperature control in the feed production process. Background Technology

[0002] Drying is an essential step in the production of extruded feed, and hot air drying technology is currently the most commonly used method.

[0003] In existing technology, hot air enters the drying drum through the air inlet, and its temperature gradually decreases with increasing distance and contact with the feed to be dried. This causes a temperature difference between the air inlet and outlet, which is detrimental to feed drying, especially for temperature-sensitive feeds. Therefore, there is a need to provide a method that can maintain a relatively balanced temperature throughout the drying drum. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a constant temperature control method, equipment, and storage medium for feed production processes, which can achieve constant temperature control of the entire drying drum.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a constant temperature control method in a feed production process, wherein multiple air inlets are provided at the top of a horizontal drying drum, and an air outlet is provided in the middle of the top of the horizontal drying drum, the method comprising:

[0007] Step S1: Construct a spatial temperature distribution model inside the horizontal drying drum, and divide the overall space inside the horizontal drying drum into multiple subspaces in the spatial temperature distribution model;

[0008] Step S2: Continuously change the adjustment parameters within the parameter adjustment range of multiple air inlets to track the temperature change of each subspace in real time, thereby obtaining the functional correspondence between each subspace and the adjustment parameters of multiple air inlets. The adjustment parameters include air volume, air temperature and air angle.

[0009] Step S3: When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected using thermal imaging technology. Based on the real-time temperature of each sub-space and the functional correspondence between each sub-space and the adjustment parameters of multiple air inlets, the temperature of each sub-space is adjusted so that each sub-space is within the target temperature range.

[0010] The beneficial effects of this invention are as follows: a spatial temperature distribution model inside the horizontal drying drum is pre-constructed, and the functional correspondence between each subspace inside the horizontal drying drum and the adjustment parameters of multiple air inlets is obtained. This allows the adjustment parameters of the two air outlets to be quickly adjusted according to the pre-obtained functional correspondence when the temperature of each subspace is too high or too low during the operation of the horizontal drying drum, thereby quickly achieving constant temperature control of the entire drying drum.

[0011] Optionally, step S3 includes:

[0012] When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected using thermal imaging technology.

[0013] In real time, it is determined whether each subspace is within the target temperature range. If it is, it waits for the next determination. Otherwise, the subspace that exceeds the target temperature range is designated as the adjustment subspace, and the subspace that is within the target temperature range is designated as the constraint subspace.

[0014] Obtain the functional correspondence between each adjustment subspace and the adjustment parameters of multiple air inlets. Use the target temperature range as the condition parameter of the functional correspondence corresponding to each adjustment subspace to obtain the adjustment function group. Use the temperature of the constraint subspace within the target temperature range as the constraint condition of the adjustment function group to obtain the adjustment parameter solution in the adjustment function group. The adjustment parameter solution includes the target adjustment parameters of multiple air inlets.

[0015] Multiple air inlets are controlled to introduce hot air according to the aforementioned adjustment parameters.

[0016] As described above, by adjusting the adjustment function set obtained from the subspace and the constraint conditions obtained from the constraint subspace, the internal space temperature after adjustment is guaranteed to be within the target temperature range.

[0017] Optionally, step S3 further includes:

[0018] If there is no solution for the adjustment parameters in the adjustment function group, the adjustment parameters of the two air outlets are continuously adjusted according to the function correspondence of each subspace to evolve the predicted temperature of each subspace after adjustment. The adjustment parameter whose average of the squared differences between the predicted temperatures of all subspaces and the median value of the target temperature range is minimized is taken as the solution for the adjustment parameters in the adjustment function group.

[0019] As described above, when it is impossible to ensure that the temperature throughout the entire space is within the target temperature range, a method similar to minimizing variance can be used to determine the adjustment parameters, so that the deviation of the predicted temperature throughout the adjusted space is minimized, i.e., the predicted temperature throughout the adjusted space is relatively balanced.

[0020] Optionally, step S3 takes the adjustment parameter whose average of the squared differences between the predicted temperatures of all subspaces and the median values ​​of the target temperature range is minimized as the adjustment parameter solution in the adjustment function set:

[0021] The difference between the predicted temperature of each subspace and the median value of the target temperature range is obtained. If the predicted temperature is greater than or equal to the median value of the target temperature range, the corresponding difference is multiplied by a first coefficient; otherwise, it is multiplied by a second coefficient. The first coefficient is less than the second coefficient.

[0022] The adjustment parameter whose mean is the average of the squared differences after multiplying by the coefficients is taken as the adjustment parameter solution in the set of adjustment functions.

[0023] Optionally, the first coefficient is [0.8, 1) times the second coefficient.

[0024] As described above, if the temperature inside the horizontal drying drum is too high, there will be a waste of heat. However, if the temperature is too low, there will be a problem with poor drying effect. Therefore, the weight value of high temperature is less than that of low temperature. This way, when obtaining the adjustment parameter solution, the high temperature will be more favored, so as to avoid the phenomenon of low temperature and ensure the drying effect of feed.

[0025] Optionally, step S3 further includes:

[0026] When the horizontal drying drum is in an unloaded state, first adjust each sub-space to be within the target temperature range, and then switch to the operating state.

[0027] As described above, the temperature inside the horizontal drying drum is controlled within the target temperature range before operation to ensure that the first batch of feed can achieve the expected drying effect.

[0028] Optionally, an air inlet is provided on each of the two sides of the top of the horizontal drying cylinder.

[0029] As described above, in actual use, constant temperature control can be achieved throughout the drying drum through two air inlets. If more precise temperature control is required, the number of air inlets can be increased for finer adjustment.

[0030] Optionally, the adjustment parameters include at least one of the following: air intake volume, air intake temperature, and air intake angle.

[0031] As described above, the adjustment parameters should be set according to the actual conditions of the horizontal drying drum.

[0032] In a second aspect, the present invention provides a constant temperature control device for a feed production process, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements a constant temperature control method for a feed production process as described in the first aspect.

[0033] Thirdly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a constant temperature control method in a feed production process as described in the first aspect.

[0034] The technical effects of the constant temperature control device in the feed production process provided in the second aspect and the technical effects of the computer-readable storage medium provided in the third aspect are described in the relevant description of the constant temperature control method in the feed production process provided in the first aspect. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the main process of a constant temperature control method in the feed production process according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of a constant temperature control device in a feed production process according to an embodiment of the present invention.

[0037] [Explanation of Labels in the Attached Image]

[0038] 1: A temperature control device for feed production process;

[0039] 2: Processor;

[0040] 3: Memory. Detailed Implementation

[0041] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0042] Example 1

[0043] This embodiment is suitable for applications requiring high temperature uniformity in feed drying, enabling balanced temperature control throughout the horizontal drying drum. While this embodiment uses hot air drying technology, it is also applicable to superheated steam drying methods.

[0044] Please refer to Figure 1A constant temperature control method in the feed production process includes multiple air inlets at the top of a horizontal drying drum and an air outlet in the middle of the top of the horizontal drying drum. In this embodiment, an air inlet is provided on each side of the top of the horizontal drying drum, so that the entire horizontal drying drum has two air inlets.

[0045] Therefore, the constant temperature control method in the feed production process provided in this embodiment includes:

[0046] Step S1: Construct a spatial temperature distribution model inside the horizontal drying drum, and divide the overall space inside the horizontal drying drum into multiple subspaces in the spatial temperature distribution model;

[0047] In this embodiment, the temperature distribution model within the fixed space can be constructed using existing technologies. Based on this, the overall space within the horizontal drying drum is divided into multiple subspaces, such as by cutting it into a fixed cuboid or a ring shape. The number of subspaces is limited by the accuracy of temperature control and the processing capacity of the equipment. In this embodiment, the number of subspaces is n, where n is a positive integer.

[0048] Step S2: Continuously change the adjustment parameters within the parameter adjustment range of multiple air inlets to track the temperature change of each subspace in real time, thereby obtaining the functional correspondence between each subspace and the adjustment parameters of multiple air inlets. The adjustment parameters include air volume, air temperature and air angle.

[0049] In this embodiment, the adjustable parameters include at least one of the following: air intake volume, air intake temperature, and air intake angle. In other embodiments, where the horizontal drying drum does not support adjustment of the air intake angle, the adjustable parameters include the air intake volume and the air intake temperature.

[0050] In this embodiment, for the transformation of adjustment parameters, a single control variable method is first used for preliminary simulation, followed by simulation using combinations of two or more parameter sets. Thus, when the two air inlets in this embodiment each have airflow rates IQ1 and IQ2, airflow temperatures IT1 and IT2, and airflow angles IA1 and IA2, the temperature PT of each subspace... i =f(IQ1, IQ2, IT1, IT2, IA1, IA2), i=1,2,...n.

[0051] Step S3: When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected using thermal imaging technology. Based on the real-time temperature of each sub-space and the functional correspondence between each sub-space and the adjustment parameters of multiple air inlets, the temperature of each sub-space is adjusted so that each sub-space is within the target temperature range.

[0052] Step S3 includes:

[0053] Step S31: When the horizontal drying drum is in an unloaded state, first adjust each sub-space to be within the target temperature range, and then switch to the running state.

[0054] When the horizontal drying drum is in an unloaded state, that is, before the feed to be dried has entered the horizontal drying drum, and there are no other substances in the horizontal drying drum, the equilibrium in the horizontal drying drum can be achieved according to steps S32 to S36, or the adjustment parameters that meet the target temperature range can be directly extracted and used based on the simulation experiment conducted in step S2.

[0055] Step S32: When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected using thermal imaging technology.

[0056] Among them, thermal imaging technology can collect the temperature in the entire space in real time, thereby obtaining the real-time spatial temperature distribution inside the horizontal drying drum.

[0057] Step S33: In real time, determine whether each subspace is within the target temperature range. If so, wait for the next determination; otherwise, use the subspace that exceeds the target temperature range as the adjustment subspace and the subspace that is within the target temperature range as the constraint subspace.

[0058] The real-time temperature distribution inside the horizontal drying drum is determined according to the previously divided sub-spaces. For the entire sub-space, the average temperature value of its occupied area is used to determine whether it is within the target temperature range [TL, TH]. When the average temperature value of the sub-space is outside the target temperature range, the temperature of this sub-space needs to be adjusted. At this time, the sub-space within the target temperature range is used as a constraint sub-space to prevent the temperature adjustment of other sub-spaces from causing this sub-space to exceed the target temperature range.

[0059] Step S34: Obtain the functional correspondence between each regulation subspace and the regulation parameters of multiple air inlets. Use the target temperature range as the condition parameter of the functional correspondence corresponding to each regulation subspace to obtain the regulation function group. Use the temperature of the constraint subspace within the target temperature range as the constraint condition of the regulation function group to obtain the regulation parameter solution in the regulation function group. The regulation parameter solution includes the target regulation parameters of multiple air inlets.

[0060] For each regulated subspace, let its temperature PT i=[TL, TH] = f(IQ1, IQ2, IT1, IT2, IA1, IA2). Since the target temperature is an interval, there are multiple solutions for each adjustment subspace. At this time, it is necessary to satisfy all adjustment subspaces and all constraint subspaces to obtain an adjustment parameter solution.

[0061] Step S35: If there is no solution for the adjustment parameter in the adjustment function group, then according to the function correspondence of each subspace, continuously adjust the adjustment parameters of the two air outlets to evolve the predicted temperature of each subspace after adjustment. The adjustment parameter that minimizes the average of the squared differences between the predicted temperature of all subspaces and the median value of the target temperature range is taken as the solution for the adjustment parameter in the adjustment function group.

[0062] Therefore, when step S34 above cannot obtain a parameter solution that satisfies all conditions, it is necessary to find a more temperature-balanced adjustment parameter solution. This can be achieved by increasing the overall temperature to ensure that the entire space meets the temperature range required for drying. Specifically, the adjustment parameter solution in step S3, which is the minimum average of the squared differences between the predicted temperatures of all subspaces and the median values ​​of the target temperature range, is taken as the adjustment parameter solution in the adjustment function group:

[0063] The difference between the predicted temperature and the median value of the target temperature range for each subspace is obtained. If the predicted temperature is greater than or equal to the median value of the target temperature range, the corresponding difference is multiplied by the first coefficient; otherwise, it is multiplied by the second coefficient. The first coefficient is less than the second coefficient.

[0064] The control parameter whose mean is the average of the squared differences after multiplying by the coefficients is taken as the control parameter solution in the control function set.

[0065] In this embodiment, the first coefficient is 0.9 and the second coefficient is 1. In other embodiments, the first coefficient is a value within [0.8, 1) times the second coefficient.

[0066] The hot air temperature of the fish feed is in the range of 100-200℃. Taking the target temperature range [TL, TH] as [100, 104] as an example, the median value is 102℃. When there are two subspaces with predicted temperatures of 98℃ and 106℃, the corresponding difference is -4℃ and 4℃. At this time, -4℃ is multiplied by the second coefficient to get -4℃, and 4℃ is multiplied by the first coefficient to get 3.6℃. In this way, when the minimum value is finally selected, the adjustment parameter solution will be more biased towards high temperature rather than low temperature, thereby ensuring the drying effect of the feed.

[0067] Step S36: Control multiple air inlets to introduce hot air according to the adjustment parameters.

[0068] In this way, hot air can be introduced through the air inlet according to the adjustment parameters.

[0069] Example 2

[0070] Please refer to Figure 2 A constant temperature control device 1 for feed production process includes a memory 3, a processor 2, and a computer program stored in the memory 3 and run on the processor 2. When the processor 2 executes the computer program, it implements the steps in the above embodiment 1.

[0071] Example 3

[0072] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor 2, implements the steps in Embodiment 1 above.

[0073] Since the systems / devices described in the above embodiments of the present invention are systems / devices used to implement the methods of the above embodiments of the present invention, those skilled in the art can understand the specific structure and modifications of the systems / devices based on the methods described in the above embodiments of the present invention, and therefore will not be repeated here. All systems / devices used in the methods of the above embodiments of the present invention fall within the scope of protection of the present invention.

[0074] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0075] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions.

[0076] It should be noted that any reference numerals placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In claims that enumerate several devices, several of these devices may be embodied by the same hardware. The use of the terms first, second, third, etc., is merely for convenience of expression and does not indicate any order. These terms can be understood as part of the component names.

[0077] Furthermore, it should be noted that in the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the claims should be interpreted to include both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0079] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, then this invention should also include these modifications and variations.

Claims

1. A method for constant temperature control in a feed production process, characterized in that, The horizontal drying drum has multiple air inlets at its top and an air outlet in the center of its top. The method includes: Step S1: Construct a spatial temperature distribution model inside the horizontal drying drum, and divide the overall space inside the horizontal drying drum into multiple subspaces in the spatial temperature distribution model; Step S2: Continuously change the adjustment parameters within the parameter adjustment range of multiple air inlets to track the temperature change of each subspace in real time, thereby obtaining the functional correspondence between each subspace and the adjustment parameters of multiple air inlets. The adjustment parameters include air volume, air temperature and air angle. Step S3: When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected through thermal imaging technology. Based on the real-time temperature of each sub-space and the functional correspondence between each sub-space and the adjustment parameters of multiple air inlets, the temperature of each sub-space is adjusted so that each sub-space is within the target temperature range. Step S3 includes: When the horizontal drying drum is in operation, the real-time spatial temperature distribution inside the horizontal drying drum is continuously collected using thermal imaging technology. In real time, it is determined whether each subspace is within the target temperature range. If it is, it waits for the next determination. Otherwise, the subspace that exceeds the target temperature range is designated as the adjustment subspace, and the subspace that is within the target temperature range is designated as the constraint subspace. Obtain the functional correspondence between each adjustment subspace and the adjustment parameters of multiple air inlets. Use the target temperature range as the condition parameter of the functional correspondence corresponding to each adjustment subspace to obtain the adjustment function group. Use the temperature of the constraint subspace within the target temperature range as the constraint condition of the adjustment function group to obtain the adjustment parameter solution in the adjustment function group. The adjustment parameter solution includes the target adjustment parameters of multiple air inlets. Multiple air inlets are controlled to introduce hot air according to the aforementioned adjustment parameters.

2. The method for constant temperature control in a feed production process according to claim 1, characterized in that, Step S3 further includes: If there is no solution for the adjustment parameters in the adjustment function group, the adjustment parameters of the two air outlets are continuously adjusted according to the function correspondence of each subspace to evolve the predicted temperature of each subspace after adjustment. The adjustment parameter whose average of the squared differences between the predicted temperatures of all subspaces and the median value of the target temperature range is minimized is taken as the solution for the adjustment parameters in the adjustment function group.

3. The method for constant temperature control in the feed production process according to claim 2, characterized in that, Step S3, where the average of the squared differences between the predicted temperatures of all subspaces and the median values ​​of the target temperature range is minimized, uses the adjustment parameter in the adjustment function set as the solution: The difference between the predicted temperature of each subspace and the median value of the target temperature range is obtained. If the predicted temperature is greater than or equal to the median value of the target temperature range, the corresponding difference is multiplied by a first coefficient; otherwise, it is multiplied by a second coefficient. The first coefficient is less than the second coefficient. The adjustment parameter whose mean is the average of the squared differences after multiplying by the coefficients is taken as the adjustment parameter solution in the set of adjustment functions.

4. The constant temperature control method in the feed production process according to claim 3, characterized in that, The first coefficient is [0.8, 1) times the second coefficient.

5. A method for constant temperature control in a feed production process according to any one of claims 1 to 4, characterized in that, Step S3 further includes: When the horizontal drying drum is in an unloaded state, first adjust each sub-space to be within the target temperature range, and then switch to the operating state.

6. A method for constant temperature control in a feed production process according to any one of claims 1 to 4, characterized in that, An air inlet is provided on each of the two sides of the top of the horizontal drying cylinder.

7. A method for constant temperature control in a feed production process according to any one of claims 1 to 4, characterized in that, The adjustment parameters include at least one of the following: air intake volume, air intake temperature, and air intake angle.

8. A temperature control device for feed production, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements a constant temperature control method in the feed production process as described in any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements a constant temperature control method in a feed production process as described in any one of claims 1 to 7.

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