Dynamically controlled ethyl lactate fermentation and esterification integrated equipment

Abstract

The invention relates to the technical field of ethyl lactate processing, and discloses dynamically controlled integrated equipment for ethyl lactate fermentation and esterification, comprising first acquiring real-time fermentation data and a real-time surface image, generating a first comparison result based on the real-time fermentation data, generating a second comparison result based on the real-time surface image, inputting the first comparison result and the second comparison result into a pre-constructed fermentation state discrimination model, obtaining a fermentation state type, and when the fermentation state type is fermentation completion, inputting lactic acid in a fermentation box into a lactic acid storage box, acquiring real-time lactic acid state data, calculating a lactic acid state coefficient according to the real-time lactic acid state data, and judging whether to input a lactic acid solution from the inside of the lactic acid storage box into the inside of a stirring and containing box based on the lactic acid state coefficient, thereby realizing dynamic control of the ethyl lactate generation process, reducing manual intervention, and improving the generation efficiency and quality of ethyl lactate.

Description

Technical Field

[0001] The invention belongs to the technical field of ethyl lactate processing, and in particular relates to dynamically controlled ethyl lactate fermentation and esterification integrated equipment. Background Art

[0002] Ethyl lactate is an important chemical raw material and food additive, widely used in flavors and fragrances, pharmaceuticals, plastics and other fields. The traditional production process of ethyl lactate usually requires fermentation and esterification in steps, which not only increases equipment and operating costs, but also may reduce product purity. In the existing technology, the fermentation process and the esterification process are usually carried out separately. In order to ensure the efficient production of lactic acid bacteria, the fermentation process needs to strictly control conditions such as temperature, pH value and oxygen concentration.

[0003] For example, a Chinese patent with publication number CN1 03194367A provides a liquid fermentation device for vinegar and a working method thereof. The patent includes a fermentation tank having an air inlet, an agitator, a feed tank and an exhaust gas discharge port. The patent realizes the fermentation process required for producing ethyl lactate through the fermentation tank, but there are still certain defects.

[0004] Although the above patent has carried out fermentation, the equipment of the above patent can only carry out one process, and cannot continue to carry out esterification after the fermentation process is completed. This not only increases the equipment and operation costs, but also may reduce the purity of the product. At the same time, the ethyl lactate processing equipment in the prior art is rarely able to be combined with artificial intelligence technology to achieve precise control of the processing process of ethyl lactate. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] The integrated equipment for ethyl lactate fermentation and esterification with dynamic control includes an integrated equipment body, which includes a fermentation tank, a lactic acid storage tank and a stirring and containing tank. The inside of the fermentation tank, the inside of the lactic acid storage tank and the inside of the stirring and containing tank are all provided with containing chambers. One side of the fermentation tank is fixedly connected with an extraction pipeline, one side of the lactic acid storage tank is fixedly connected with a delivery pipeline, one end of the extraction pipeline is fixedly connected with a separator, and the liquid outlet of the separator is fixedly connected with one end of the delivery pipeline. A liquid flow control component is fixedly arranged on the top of the inner wall of the stirring and containing tank, and the inside of the lactic acid storage tank is connected with the inside of the stirring and containing tank through the liquid flow control component. The dynamic control system is also included, and the dynamic control system includes:

[0008] A first sensor is disposed on one side of the inner wall of the lactic acid storage box and is used to obtain real-time lactic acid status data;

[0009] The second sensor is arranged on one side of the inner wall of the fermentation box and is used to obtain real-time fermentation data;

[0010] An image acquisition module is used to acquire a real-time surface image, where the real-time surface image refers to a surface image of lactic acid bacteria inside a fermentation box during fermentation;

[0011] A first discrimination module is used to generate a first comparison result based on the real-time fermentation data, generate a second comparison result based on the real-time surface image, input the first comparison result and the second comparison result into a pre-built fermentation state discrimination model to obtain a fermentation state type, where the fermentation state type includes fermentation completion and fermentation incomplete;

[0012] The first control module is used for inputting the lactic acid solution in the fermentation box into the lactic acid storage box when the fermentation state type is fermentation completion;

[0013] The second control module is used to calculate the lactic acid state coefficient according to the real-time lactic acid state data, and determine whether to input the lactic acid solution from the inside of the lactic acid storage box to the inside of the stirring and containing box based on the lactic acid state coefficient.

[0014] Preferably, the real-time fermentation data includes a real-time pH value, a real-time conductivity value, and a real-time lactic acid concentration value, and the method for generating the first comparison result based on the real-time fermentation data includes:

[0015]

[0016] Where, FCR is the first comparison result, LAV re is the real-time lactate concentration value, CDV re is the real-time conductivity value, PH re is the real-time pH value, log 2(·) is a logarithmic function with base 2, cosh(·) is a hyperbolic cosine function, and k is a constant greater than 0.

[0017] Preferably, when the fermentation state type is fermentation completion, the separator passes the lactic acid into the interior of the lactic acid storage box through the delivery pipeline, and the separator is signal-connected to the first regulation module.

[0018] Preferably, the liquid control component includes a liquid pipe and a solenoid valve, the top of the liquid pipe is connected to the interior of the lactic acid storage box, the middle of the liquid pipe is fixedly provided with a solenoid valve, and the solenoid valve is connected to the second control module signal.

[0019] Preferably, a stirring motor is fixedly arranged at the top of the inner wall of the stirring containing box, and a stirring assembly is arranged at the output end of the stirring motor. The stirring assembly includes a stirring shaft and a stirring frame. One end of the stirring shaft is fixedly connected to the output end of the stirring motor, and the outer side of the stirring shaft is fixedly connected to the stirring frame.

[0020] Preferably, a supporting cross bar is fixedly connected to the interior of the stirring frame, and the supporting cross bar divides the interior of the stirring frame into an upper stirring chamber and a lower stirring chamber, and a separation net is arranged in the lower stirring chamber.

[0021] Preferably, the method for generating the second comparison result based on the real-time surface image comprises:

[0022] The real-time surface image is converted into a binary image, and the real-time gray value of the binary image is obtained. The ratio of the real-time gray value to the standard gray value is used as the second comparison result, and the standard gray value is the gray value of the standard surface image.

[0023] Preferably, the method for constructing the fermentation state discrimination model includes:

[0024] Obtain n groups of data, where n is a positive integer greater than 1, and the data include a historical first comparison result, a historical second comparison result, and a historical fermentation state type. The historical first comparison result, the historical second comparison result, and the historical fermentation state type are used as sample sets, and the sample sets are divided into a training set and a test set. A classifier is constructed, and the historical first comparison result and the historical second comparison result in the training set are used as input data, and the historical fermentation state type in the training set is used as output data. The classifier is trained to obtain an initial classifier, and the initial classifier is tested using the test set, and a classifier that meets a preset accuracy is output as a fermentation state discrimination model.

[0025] Preferably, the real-time lactic acid status data includes a real-time lactic acid temperature value, a real-time lactic acid pH value, and a real-time lactic acid water content value. The method for calculating the lactic acid status coefficient according to the real-time lactic acid status data includes:

[0026]

[0027] Where LSC is the lactate state coefficient, LAT is re is the real-time lactic acid temperature value, LAT sd is the standard lactic acid temperature value, LWC re is the real-time lactic acid water content value, LWC sd is the standard lactic acid water content value, LPH re Real-time lactate pH value, LPH sd is the standard pH value of lactic acid, and m and e are both constants greater than 0.

[0028] Preferably, the method for determining whether to input lactic acid from the inside of the lactic acid storage box to the inside of the stirring and containing box based on the lactic acid state coefficient includes:

[0029] Determine whether the lactic acid state coefficient is less than a preset state coefficient threshold value. If so, lactic acid is input from the inside of the lactic acid storage box to the inside of the stirring and containing box. If not, lactic acid is not input from the inside of the lactic acid storage box to the inside of the stirring and containing box.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The integrated equipment for fermentation and esterification of ethyl lactate in the present invention can realize fermentation and esterification successively, so that there is no need to transfer and process the fermented lactic acid in a cumbersome manner, thereby avoiding the contamination of lactic acid during the transfer process, and also reducing the cost of equipment and operation. First, real-time fermentation data and real-time surface images are obtained, a first comparison result is generated based on the real-time fermentation data, and a second comparison result is generated based on the real-time surface image. The first comparison result and the second comparison result are input into a pre-constructed fermentation state discrimination model to obtain the fermentation state type. When the fermentation state type is fermentation completion, the lactic acid inside the fermentation box is input into the inside of the lactic acid storage box, and then real-time lactic acid state data is obtained. The lactic acid state coefficient is calculated according to the real-time lactic acid state data, and it is judged whether to input the lactic acid solution from the inside of the lactic acid storage box to the inside of the stirring and containing box based on the lactic acid state coefficient. In this way, dynamic regulation of the ethyl lactate generation process is realized, which not only reduces manual intervention, but also improves the generation efficiency and quality of ethyl lactate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the integrated equipment for ethyl lactate fermentation and esterification in the present invention;

[0033] Figure 2 It is a front view of the integrated equipment for ethyl lactate fermentation and esterification in the present invention;

[0034] Figure 3 It is a schematic diagram of the internal structure of the integrated device body in the present invention;

[0035] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0036] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0037] Figure 6 It is a structural schematic diagram of the stirring assembly in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the liquid flow control component in the present invention;

[0039] Figure 8 It is a schematic diagram of the module part of the dynamic control system in the present invention.

[0040] The meanings of the annotations in the figures are as follows:

[0041] 10. Integrated equipment body; 110. Fermentation box; 120. Lactic acid storage box; 130. Stirring and containing box; 140. Containing chamber; 150. First sensor; 160. Second sensor; 20. Extraction pipeline; 30. Delivery pipeline; 40. Separator; 50. Stirring assembly; 510. Stirring shaft; 520. Stirring frame; 530. Support cross bar; 540. Separation net; 60. Liquid control assembly; 610. Liquid pipeline; 620. Solenoid valve. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0045] Example 1

[0046] See also Figure 1 and Figure 2As shown, the present embodiment provides a dynamically regulated integrated equipment for ethyl lactate fermentation and esterification, including an integrated equipment body 10, the integrated equipment body 10 includes a fermentation tank 110, a lactic acid storage tank 120 and a stirring and containing tank 130, and a containing chamber 140 is provided inside the fermentation tank 110, inside the lactic acid storage tank 120 and inside the stirring and containing tank 130, one side of the fermentation tank 110 is fixedly connected to an extraction pipe 20, one side of the lactic acid storage tank 120 is fixedly connected to a delivery pipe 30, one end of the extraction pipe 20 is fixedly connected to a separator 40, and the liquid outlet of the separator 40 is fixedly connected to one end of the delivery pipe 30.

[0047] In this embodiment, the fermentation tank 110 stores lactic acid bacteria for fermenting and producing lactic acid. The separator 40 draws out the fermentation products through the extraction pipe 20. The fermentation products include lactic acid, intracellular protein and lactate, etc. The separator 40 separates the lactic acid and transports the lactic acid to the interior of the lactic acid storage tank 120 through the delivery pipe 30 for temporary storage. The separator 40 can be a centrifuge device or a membrane separation device.

[0048] like Figure 3 and Figure 4 As shown, a liquid flow control component 60 is fixedly provided on the top of the inner wall of the stirring and containing box 130 , and the interior of the lactic acid storage box 120 is connected with the interior of the stirring and containing box 130 through the liquid flow control component 60 .

[0049] It is understandable that the lactic acid generated after fermentation will enter the interior of the lactic acid storage box 120 for storage. When an esterification reaction is required, the liquid control component 60 is opened, and the lactic acid will enter the interior of the stirring and containing box 130 from the interior of the lactic acid storage box 120. Ethanol and a catalyst will also be introduced into the interior of the stirring and containing box 130. The lactic acid that enters will undergo an esterification reaction with the ethanol and the catalyst to generate ethyl lactate. In this embodiment, the integrated equipment for ethyl lactate fermentation and esterification can successively realize fermentation and esterification, so there is no need to carry out cumbersome transfer and processing of the fermented lactic acid, which avoids contamination of the lactic acid during the transfer process, and also reduces the cost required for equipment and operation.

[0050] This embodiment also discloses a dynamic control system, which includes:

[0051] like Figure 4 As shown, the first sensor 150 is disposed on one side of the inner wall of the lactic acid storage box 120 for acquiring real-time lactic acid status data.

[0052] It should be noted that the real-time lactic acid status data includes the real-time lactic acid temperature value, the real-time lactic acid pH value and the real-time lactic acid water content value. The real-time lactic acid temperature value refers to the temperature value of the lactic acid solution, the real-time lactic acid water content value refers to the water content in the lactic acid solution, and the real-time lactic acid pH value refers to the pH value of the lactic acid solution. Since the lactic acid stored in the lactic acid storage box 120 still needs to undergo subsequent esterification reactions, the present embodiment determines the real-time situation of the lactic acid by obtaining the real-time lactic acid status data, and determines whether to subject the lactic acid to subsequent esterification reactions based on the real-time situation of the lactic acid. This not only realizes automatic regulation, but also allows the lactic acid to undergo esterification reactions when it is in a better state, thereby improving the quality of subsequent ethyl lactate.

[0053] The first sensor 150 may be a multifunctional sensor. The first sensor 150 at least includes a capacitive moisture sensor, a temperature sensor, and a pH sensor. The capacitive moisture sensor may be used to measure the moisture content in the lactic acid solution.

[0054] like Figure 5 As shown, the second sensor 160 is disposed on one side of the inner wall of the fermentation tank 110 for acquiring real-time fermentation data.

[0055] The real-time fermentation data includes real-time pH value, real-time conductivity value and real-time lactic acid concentration value. It can be understood that the real-time pH value refers to the pH value of the lactic acid bacteria solution, the real-time conductivity value refers to the real-time conductivity value of the lactic acid bacteria solution, and the real-time lactic acid concentration value refers to the concentration value of lactic acid in the lactic acid bacteria solution. Different from the above-mentioned real-time lactic acid pH value and real-time lactic acid water content value, the lactic acid bacteria solution is fermented and then filtered to produce a lactic acid solution. Taking pH value as an example, in the above-mentioned, the real-time lactic acid pH value refers to the pH value of the lactic acid solution, and the real-time pH value refers to the pH value of the lactic acid bacteria solution.

[0056] Similarly, this embodiment determines the real-time situation of the lactic acid bacteria solution by acquiring real-time fermentation data, and determines whether to extract the lactic acid bacteria solution from the inside of the fermentation box 110 according to the real-time situation of the lactic acid bacteria solution. The second sensor 160 can also be a multi-functional sensor. The second sensor 160 includes at least a pH sensor, a multi-parameter water quality sensor and a biosensor. The multi-parameter water quality sensor can obtain the real-time conductivity value of the lactic acid bacteria solution, and the biosensor is used to obtain the concentration value of lactic acid in the lactic acid bacteria solution.

[0057] like Figure 8 As shown, the image acquisition module is used to acquire a real-time surface image, where the real-time surface image refers to a surface image of the lactic acid bacteria inside the fermentation box 110 during fermentation.

[0058] In this embodiment, the image acquisition module can be a camera installed inside the fermentation box 110, which can periodically acquire real-time surface images. It can be understood that bubbles will gradually appear on the surface during the fermentation of the lactic acid bacteria solution, and the bubbles can be used to determine to a certain extent whether the fermentation of the lactic acid bacteria solution is complete.

[0059] The first discrimination module is used to generate a first comparison result based on the real-time fermentation data and a second comparison result based on the real-time surface image, and input the first comparison result and the second comparison result into a pre-built fermentation state discrimination model to obtain a fermentation state type, wherein the fermentation state type includes fermentation completed and fermentation incomplete.

[0060] The method for generating a first comparison result based on real-time fermentation data includes:

[0061]

[0062] Where, FCR is the first comparison result, LAV re is the real-time lactate concentration value, CDV re is the real-time conductivity value, PH re is the real-time pH value, log 2 (·) is a logarithmic function with base 2, cosh(·) is a hyperbolic cosine function, and k is a constant greater than 0.

[0063] It should be added that during the fermentation of the lactic acid bacteria solution, the real-time lactic acid concentration value continues to increase. Under normal circumstances, the fermentation process mainly produces lactic acid, and lactate is the main conductive ion. Then the increase in real-time conductivity can better reflect the increase in lactic acid. Similarly, the more lactic acid is produced, the smaller the corresponding real-time pH value. Therefore, in this embodiment, the first comparison result is positively correlated with the amount of lactic acid generated. The larger the first comparison result, the more lactic acid is generated.

[0064] The method for generating a second comparison result based on the real-time surface image includes:

[0065] The real-time surface image is converted into a binary image, and the real-time gray value of the binary image is obtained. The ratio of the real-time gray value to the standard gray value is used as the second comparison result, and the standard gray value is the gray value of the standard surface image.

[0066] It should be noted that the standard surface image refers to the image of the fermented lactic acid bacteria solution pre-stored in the system. From the above content, it can be seen that bubbles will be generated on the surface of the lactic acid bacteria solution during the fermentation process. In the grayscale image, the bubbles will usually appear as an area brighter than the liquid background, that is, it will appear as a lighter gray or white. Therefore, in the process of binarizing the image, the real-time grayscale value will become smaller and smaller as the fermentation process progresses. Therefore, this embodiment uses the ratio of the real-time grayscale value to the standard grayscale value as the second comparison result. The smaller the second comparison result, the longer the fermentation process lasts, and the more lactic acid is produced.

[0067] The method for constructing the fermentation state discrimination model includes:

[0068] Obtain n groups of data, where n is a positive integer greater than 1, and the data include a historical first comparison result, a historical second comparison result, and a historical fermentation state type. The historical first comparison result, the historical second comparison result, and the historical fermentation state type are used as sample sets, and the sample sets are divided into a training set and a test set. A classifier is constructed, and the historical first comparison result and the historical second comparison result in the training set are used as input data, and the historical fermentation state type in the training set is used as output data. The classifier is trained to obtain an initial classifier, and the initial classifier is tested using the test set, and a classifier that meets a preset accuracy is output as a fermentation state discrimination model, and the classifier is preferably a naive Bayes model or a support vector machine model.

[0069] It can be understood that the technicians in this field obtain n groups of data through multiple experiments. Then the basis for the fermentation state discrimination model to output the fermentation state type is that the fermentation is completed only when the first comparison result and the second comparison result meet the preset standard at the same time, otherwise the fermentation is not completed. Taking the first comparison result as an example, since the first comparison result is positively correlated with the amount of lactic acid produced, the larger the first comparison result, the more corresponding lactic acid is produced. Therefore, only when the first comparison result is greater than the preset first result threshold value can it be characterized that the first comparison result meets the preset standard.

[0070] The first regulating module is used for inputting the lactic acid solution in the fermentation tank 110 into the lactic acid storage tank 120 when the fermentation state type is fermentation completion.

[0071] It can be understood that when the fermentation state type is fermentation completed, the first control module sends a signal to the separator 40, the separator 40 will extract the fermented lactic acid bacteria solution through the extraction pipe 20, and after filtering through the separator 40, the lactic acid solution is input into the interior of the lactic acid storage tank 120 through the delivery pipe 30.

[0072] The second control module is used to calculate the lactic acid state coefficient according to the real-time lactic acid state data, and determine whether to input the lactic acid solution from the inside of the lactic acid storage box 120 into the inside of the stirring and containing box 130 based on the lactic acid state coefficient.

[0073] The method for calculating the lactate status coefficient based on the real-time lactate status data includes:

[0074]

[0075] Where LSC is the lactate state coefficient, LAT is re is the real-time lactic acid temperature value, LAT sd is the standard lactic acid temperature value, LWC re is the real-time lactic acid water content value, LWC sd is the standard lactic acid water content value, LPH re Real-time lactate pH value, LPH sd is the standard pH value of lactic acid, and m and e are both constants greater than 0.

[0076] It can be understood that a too high lactic acid temperature value or a too low lactic acid temperature value is not conducive to the subsequent esterification reaction of the lactic acid solution. The same is true for the lactic acid water content value and the lactic acid pH value. In this embodiment, the standard lactic acid temperature value, the standard lactic acid water content value and the standard lactic acid pH value are determined by expert experience and are pre-stored in the system in advance. It can be seen from the content in the formula that, taking the real-time lactic acid temperature value as an example, the absolute value of the difference between the real-time lactic acid temperature value and the standard lactic acid temperature value is positively correlated with the lactic acid state coefficient. Therefore, it can be concluded that the smaller the lactic acid state coefficient is, the better the state of the lactic acid solution is, and it is more conducive to the subsequent esterification reaction.

[0077] The method for determining whether to input lactic acid from the inside of the lactic acid storage box 120 to the inside of the stirring and containing box 130 based on the lactic acid state coefficient includes:

[0078] Determine whether the lactic acid state coefficient is less than the preset state coefficient threshold. If so, the lactic acid is input from the inside of the lactic acid storage box 120 to the inside of the stirring and containing box 130. If not, the lactic acid is not input from the inside of the lactic acid storage box 120 to the inside of the stirring and containing box 130.

[0079] The present embodiment first obtains real-time fermentation data and real-time surface images, generates a first comparison result based on the real-time fermentation data, generates a second comparison result based on the real-time surface image, inputs the first comparison result and the second comparison result into a pre-constructed fermentation state discrimination model, obtains the fermentation state type, and when the fermentation state type is fermentation completion, the lactic acid inside the fermentation tank 110 is input into the inside of the lactic acid storage tank 120, and then obtains real-time lactic acid state data, calculates the lactic acid state coefficient according to the real-time lactic acid state data, and determines whether to input the lactic acid solution from the inside of the lactic acid storage tank 120 into the inside of the stirring and containing tank 130 based on the lactic acid state coefficient. In this way, dynamic regulation of the ethyl lactate production process is achieved, which not only reduces manual intervention, but also improves the production efficiency and quality of ethyl lactate.

[0080] Example 2

[0081] Following the above embodiment 1, Figure 3 and Figure 6 As shown, a stirring motor is fixedly arranged at the top of the inner wall of the stirring containing box 130, and a stirring assembly 50 is arranged at the output end of the stirring motor. The stirring assembly 50 includes a stirring shaft 510 and a stirring frame 520. One end of the stirring shaft 510 is fixedly connected to the output end of the stirring motor, and the outer side of the stirring shaft 510 is fixedly connected to the stirring frame 520.

[0082] A supporting cross bar 530 is fixedly connected to the interior of the stirring frame 520 . The supporting cross bar 530 divides the interior of the stirring frame 520 into an upper stirring chamber and a lower stirring chamber. A separation net 540 is provided in the lower stirring chamber.

[0083] In the present embodiment, since there are lactic acid solution, ethanol solution and catalyst inside the stirring and containing box 130, in order to further accelerate the esterification reaction process, a stirring motor and a stirring assembly 50 are provided. The stirring motor drives the stirring assembly 50 to rotate, thereby achieving stirring efficiency, so that good esterification is achieved between the lactic acid solution, ethanol solution and the catalyst.

[0084] Example 3

[0085] Following the above embodiment 1, Figure 7 As shown, the liquid control component 60 includes a liquid pipe 610 and a solenoid valve 620. The top of the liquid pipe 610 is connected to the interior of the lactic acid storage box 120. The middle of the liquid pipe 610 is fixedly provided with a solenoid valve 620, and the solenoid valve 620 is connected to the signal of the second control module.

[0086] In this embodiment, the solenoid valve 620 can control the opening and closing of the liquid pipeline 610, and the liquid pipeline 610 is respectively connected to the interior of the lactic acid storage box 120 and the interior of the stirring and containing box 130. Therefore, the solenoid valve 620 is connected to the signal of the second control module, and can automatically control the lactic acid solution to enter from the interior of the lactic acid storage box 120 into the interior of the stirring and containing box 130.

[0087] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters, weights and thresholds in the formula are set by technicians in this field according to actual conditions.

[0088] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through a wired network or a wireless network. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD) or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0089] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0090] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0091] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only one, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0092] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0093] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0095] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dynamically controlled ethyl lactate fermentation esterification method, characterized in that: Based on the integrated device, the integrated device comprises an integrated device body (10), the integrated device body (10) comprises a fermentation box (110), a lactic acid storage box (120) and a stirring and containing box (130), the interior of the fermentation box (110), the interior of the lactic acid storage box (120) and the interior of the stirring and containing box (130) are all provided with a containing chamber (140), one side of the fermentation box (110) is fixedly connected with an extraction pipe (20), and the lactic acid storage box (120) is connected to the stirring and containing box (130). 0), one side of the extraction pipe (20) is fixedly connected to a delivery pipe (30), one end of the extraction pipe (20) is fixedly connected to a separator (40), a liquid outlet of the separator (40) is fixedly connected to one end of the delivery pipe (30), a liquid flow control component (60) is fixedly arranged on the top of the inner wall of the stirring and containing box (130), the interior of the lactic acid storage box (120) is connected to the interior of the stirring and containing box (130) through the liquid flow control component (60), and also includes a dynamic control system, the dynamic control system includes: A first control module, a second control module, a first discrimination module and an image acquisition module; A first sensor (150) is disposed on one side of the inner wall of the lactic acid storage box (120); A second sensor (160) is disposed on one side of the inner wall of the fermentation box (110); The method comprises: Real-time lactic acid status data is obtained through a first sensor (150); lactic acid bacteria used for fermenting and producing lactic acid are stored inside the fermentation box (110), and real-time fermentation data is obtained through a second sensor (160); Acquiring a real-time surface image through an image acquisition module, wherein the real-time surface image refers to a surface image of lactic acid bacteria inside the fermentation box (110) during fermentation; The first discrimination module generates a first comparison result based on the real-time fermentation data and a second comparison result based on the real-time surface image; the first comparison result and the second comparison result are input into a pre-built fermentation state discrimination model to obtain a fermentation state type, wherein the fermentation state type includes fermentation completion and fermentation incomplete; the real-time fermentation data includes a real-time pH value, a real-time conductivity value, and a real-time lactic acid concentration value, and the method for generating the first comparison result based on the real-time fermentation data includes: Where, FCR is the first comparison result, LAV re is the real-time lactate concentration value, CDV re is the real-time conductivity value, PH re is the real-time pH value, log2(·) is the logarithmic function with base 2, cosh(·) is the hyperbolic cosine function, and k is a constant greater than 0; When the fermentation state type is fermentation completion, the first control module inputs the lactic acid solution in the fermentation tank (110) into the lactic acid storage tank (120), and the separator (40) absorbs the fermentation product through the extraction pipe (20), separates the lactic acid, and transports the lactic acid to the inside of the lactic acid storage tank (120) through the transport pipe (30); The second control module calculates a lactic acid state coefficient based on the real-time lactic acid state data, and determines whether to input the lactic acid solution from the inside of the lactic acid storage box (120) into the inside of the stirring and containing box (130) based on the lactic acid state coefficient, and perform an esterification reaction in the stirring and containing box (130); the real-time lactic acid state data includes a real-time lactic acid temperature value, a real-time lactic acid pH value, and a real-time lactic acid water content value. The method for calculating the lactic acid state coefficient based on the real-time lactic acid state data includes: Where LSC is the lactate state coefficient, LAT is re is the real-time lactic acid temperature value, LAT sd is the standard lactic acid temperature value, LWC re is the real-time lactic acid water content value, LWC sd is the standard lactic acid water content value, LPH re Real-time lactate pH value, LPH sd is the standard pH value of lactic acid, and m and e are both constants greater than 0.

2. The method for ethyl lactate fermentation esterification by dynamic control according to claim 1, characterized in that: When the fermentation state type is fermentation completion, the separator (40) passes the lactic acid into the interior of the lactic acid storage box (120) through the delivery pipeline (30), and the separator (40) is signal-connected to the first control module.

3. The method for ethyl lactate fermentation esterification by dynamic control according to claim 1, characterized in that: The liquid flow control component (60) comprises a liquid flow pipe (610) and a solenoid valve (620), wherein the top end of the liquid flow pipe (610) is connected to the interior of the lactic acid storage box (120), and the middle part of the liquid flow pipe (610) is fixedly provided with a solenoid valve (620), and the solenoid valve (620) is connected to the second control module signal.

4. The method for ethyl lactate fermentation esterification by dynamic control according to claim 1, characterized in that: A stirring motor is also fixedly arranged at the top of the inner wall of the stirring housing (130); a stirring assembly (50) is arranged at the output end of the stirring motor; the stirring assembly (50) comprises a stirring shaft (510) and a stirring frame (520); one end of the stirring shaft (510) is fixedly connected to the output end of the stirring motor; and the outer side of the stirring shaft (510) is fixedly connected to the stirring frame (520).

5. The method for dynamically controlling ethyl lactate fermentation esterification according to claim 4, characterized in that: A support cross bar (530) is fixedly connected to the interior of the stirring frame (520), and the support cross bar (530) divides the interior of the stirring frame (520) into an upper stirring chamber and a lower stirring chamber, and a separation net (540) is arranged in the lower stirring chamber.

6. The method for dynamically controlling ethyl lactate fermentation esterification according to claim 5, characterized in that: The method for generating a second comparison result based on the real-time surface image comprises: The real-time surface image is converted into a binary image, and the real-time gray value of the binary image is obtained. The ratio of the real-time gray value to the standard gray value is used as the second comparison result, and the standard gray value is the gray value of the standard surface image.

7. The method for dynamically controlling ethyl lactate fermentation esterification according to claim 6, characterized in that: The method for constructing the fermentation state discrimination model comprises: Obtain n groups of data, where n is a positive integer greater than 1, and the data include a historical first comparison result, a historical second comparison result, and a historical fermentation state type. The historical first comparison result, the historical second comparison result, and the historical fermentation state type are used as sample sets, and the sample sets are divided into a training set and a test set. A classifier is constructed, and the historical first comparison result and the historical second comparison result in the training set are used as input data, and the historical fermentation state type in the training set is used as output data. The classifier is trained to obtain an initial classifier, and the initial classifier is tested using the test set, and a classifier that meets a preset accuracy is output as a fermentation state discrimination model.

8. The method for dynamically controlling ethyl lactate fermentation esterification according to claim 7, characterized in that: The method for judging whether to input lactic acid from the inside of the lactic acid storage box (120) into the inside of the stirring and containing box (130) based on the lactic acid state coefficient comprises: It is determined whether the lactic acid state coefficient is less than a preset state coefficient threshold value. If so, the lactic acid is input from the inside of the lactic acid storage box (120) to the inside of the stirring and containing box (130). If not, the lactic acid is not input from the inside of the lactic acid storage box (120) to the inside of the stirring and containing box (130).

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