Crystallization equipment for carbon source production and control method

Abstract

The invention relates to the technical field of industrial control, in particular to crystallization equipment for carbon source production and a control method. In combination with the stable change condition of the dissolving effect reference value and the solubility, the corrected motor rotating speed as small as possible under the condition that the solubility requirement is met is determined; further determining a self-adaptive filtering aperture which better meets the filtering requirement at each sampling moment in combination with the particle size data and turbidity of solution particles on the dimension of the filtering difficulty; therefore, real-time adjustment and control are performed by combining correction of the rotating speed of the motor and the self-adaptive filtering aperture, so that the dissolving and filtering process is more efficient and better in effect, and the crystallization effect in the carbon source production process is indirectly improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial control, and in particular to a crystallization device and a control method for carbon source production. Background Art

[0002] Carbon sources refer to substances that provide carbon atoms in biochemical processes, which are used to generate new biomolecules such as proteins, fats, and nucleic acids. In the production of carbon sources in industrial production, the crystallization step can purify and separate specific compounds, that is, it can be used to extract and purify the target substance from a complex mixture to achieve the required purity and quality.

[0003] The patent document with publication number CN113457201A in the prior art discloses a continuous crystallization device and a continuous crystallization process. The patent applies the mechanical energy of high-speed shear mixing to the dissolution process, which will make the solute reach a higher solubility and enter a supersaturated state under the same temperature and solvent conditions. Compared with the existing recrystallization method, the device is more conducive to crystal formation, thereby improving the crystallization efficiency and the purity of the obtained crystalline material, but the device still has a high room for optimization in terms of intelligence. The second high-speed shear mixer in the equipment is used to ensure the uniformity of the solution and the solubility of the solute, and it also plays the role of further mixing and refining the solute particles in the solution. Therefore, the motor speed setting of the second high-speed shear mixer is extremely important; too high a motor speed will lead to energy waste and machine wear, and too low a motor speed may not make the solution reach a supersaturated state; and for the filtering device, the size of its filter aperture will also affect the effect and efficiency of crystallization; a large aperture can increase the flow rate of the solution, but will cause more smaller impurities to pass through and reduce the purity of the crystalline material, and a small aperture can improve the filtering effect of impurities, but will cause the flow rate of the solution to decrease and reduce the crystallization efficiency; and solutions in different states require different motor speeds and aperture sizes. When dissolving and filtering according to the existing technology using a constant motor speed and aperture size, the effect of dissolving and filtering will be poor. Summary of the invention

[0004] The present application provides a crystallization device for carbon source production, comprising a control module, a concentration sensor, a turbidity sensor, a particle size analyzer, a second high-speed shear solid-liquid mixer and a second motor; the concentration sensor, the turbidity sensor, the particle size analyzer and the second motor are all located in the second high-speed shear solid-liquid mixer, the concentration sensor is used to collect the solute dissolution mass in the solution in the second high-speed shear solid-liquid mixer, the turbidity sensor is used to collect the turbidity of the solution in the second high-speed shear solid-liquid mixer, the particle size analyzer is used to collect the particle size data of the solution in the second high-speed shear solid-liquid mixer, and the concentration sensor, the turbidity sensor and the particle size analyzer are all connected to the control module by signal; in the second high-speed shear solid-liquid mixer, the solubility, turbidity and solution particle size data at each sampling time are obtained through the control module;

[0005] According to the solubility and turbidity time series changes at each sampling moment, the solute dissolution effect reference value at each sampling moment is determined; according to the solubility and the solute dissolution effect reference value stable changes at each sampling moment, the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment is determined;

[0006] The aperture of the filter device is adjusted according to the solution particle size data and turbidity at each sampling moment to determine the adaptive filtering aperture at each sampling moment; and adaptive dissolution filtering is performed according to the modified motor speed and the adaptive filtering aperture.

[0007] Preferably, the solubility acquisition process includes:

[0008] The solubility at each sampling moment is determined based on the ratio between the dissolved mass of the solute and the volume of the solution solvent at each sampling moment.

[0009] Preferably, the process of obtaining the solute dissolution effect reference value includes:

[0010] The difference between the solubility at each sampling moment and the prior standard solubility is taken as the solubility standard deviation at each sampling moment;

[0011] Determine the turbidity influence weight at each sampling time according to the size of the solubility standard deviation and the instantaneous change of turbidity at the corresponding sampling time;

[0012] According to the solubility standard deviation and the turbidity influence weight, the solute dissolution effect reference value at each sampling time is determined; the solubility standard deviation and the turbidity influence weight are both positively correlated with the solute dissolution effect reference value.

[0013] Preferably, the process of obtaining the turbidity influence weight includes:

[0014] Take each sampling moment as the target moment in turn;

[0015] When the solubility standard deviation at the target time is greater than 0, the difference between the turbidity at the target time and the turbidity at the previous sampling time is negatively correlated to determine the turbidity influence weight at the target time;

[0016] When the solubility standard deviation at the target time is less than or equal to 0, the turbidity influence weight at the target time is set to a preset constant.

[0017] Preferably, the process of determining the solute dissolution effect reference value at each sampling time according to the solubility standard deviation and the turbidity influence weight includes:

[0018] The product of the solubility standard deviation and the turbidity influence weight is normalized to determine the solute dissolution effect reference value at each sampling time.

[0019] Preferably, the process of acquiring the modified motor speed includes:

[0020] Obtain the minimum speed value of the second high-speed shear solid-liquid mixer in the working state; use the corrected motor speed at the sampling moment before each sampling moment as the first reference motor speed at each sampling moment; use the product between the normalized value of the negative correlation mapping value of the solubility standard deviation at each sampling moment and the minimum speed value as the speed adjustment value at each sampling moment; use the sum of the first reference motor speed and the speed adjustment value as the second reference motor speed at each sampling moment;

[0021] The corrected motor speed at each sampling moment is determined according to the stability of the change in the solute dissolution effect reference value in time sequence and the first reference motor speed and the second reference motor speed.

[0022] Preferably, determining the corrected motor speed at each sampling moment according to the real-time change of the solute dissolution effect reference value in time sequence and the first reference motor speed and the second reference motor speed comprises:

[0023] For any real-time sampling moment:

[0024] The difference between the solute dissolution effect reference value corresponding to the real-time sampling moment and the previous solute dissolution effect reference value is used as the solute dissolution effect change value corresponding to the real-time sampling moment;

[0025] When the solute dissolution effect change value is greater than a preset first effect threshold or less than a preset second effect threshold, the second reference motor speed is used as the corrected motor speed at the corresponding real-time sampling moment;

[0026] When the solute dissolution effect change value is less than or equal to a preset first effect threshold and greater than or equal to a preset second effect threshold, the corrected motor speed at the sampling moment before the real-time sampling moment is used as the corrected motor speed at the real-time sampling moment;

[0027] The corrected motor speed at each sampling moment is determined according to the corrected motor speed at the real-time sampling moment.

[0028] Preferably, the process of obtaining the adaptive filtering aperture includes:

[0029] Normalizing the product of the mean value of all solution particle size data measured at each sampling time and the turbidity to determine the filtration difficulty at each sampling time;

[0030] According to the filtering difficulty and the maximum filtering aperture of the filtering device, the adaptive filtering aperture at each sampling moment is determined; the filtering difficulty is negatively correlated with the adaptive filtering aperture; the maximum filtering aperture is positively correlated with the adaptive filtering aperture.

[0031] Preferably, the process of determining the adaptive filtering aperture at each sampling moment according to the filtering difficulty and the maximum filtering aperture of the filtering device includes:

[0032] The product of the negative correlation mapping value of the filtering difficulty and the maximum filtering aperture of the filtering device is used as the adaptive filtering aperture at each sampling moment.

[0033] A method for controlling a crystallization device for carbon source production comprises the following steps:

[0034] In the second high-speed shear solid-liquid mixer, the solubility, turbidity, and solution particle size data at each sampling time are obtained through the control module;

[0035] According to the solubility and turbidity time series changes at each sampling moment, the solute dissolution effect reference value at each sampling moment is determined; according to the solubility and the solute dissolution effect reference value stable changes at each sampling moment, the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment is determined;

[0036] The aperture of the filter device is adjusted according to the solution particle size data and turbidity at each sampling moment to determine the adaptive filtering aperture at each sampling moment; and adaptive dissolution filtering is performed according to the modified motor speed and the adaptive filtering aperture.

[0037] This application has the following beneficial effects:

[0038] For the solution in the second high-speed shear solid-liquid mixer, the solubility and turbidity can reflect the dissolution of the solute. The larger the corresponding solubility, the better the solute dissolution effect; and the change in turbidity can indirectly reflect the change in solubility, so the solute dissolution effect reference value is determined in combination with the temporal changes in solubility and turbidity. Further, when the solute dissolution effect reference value is low, it usually corresponds to incomplete dissolution of the solute in the solvent, so it is necessary to increase the motor speed to promote dissolution; and when the solute dissolution effect reference value is high, it means that the solute dissolves better in the solvent, and usually has reached a saturated state; and after the solubility reaches a saturated state, continuing to increase the motor speed will not obtain a better dissolution effect, so it is necessary to adjust the motor speed downward to save energy; so this application determines a more accurate correction motor speed according to the solubility at each sampling moment and the stable change of the solute dissolution effect reference value, that is, the solubility reaches a saturated state and is as small as possible. Adaptive motor speed. Furthermore, according to the turbidity change and the solution particle size data, the filtration difficulty is measured from the particle density and particle size in the solution, so that the determined adaptive filtration aperture is more accurate; finally, the motor speed is corrected and the adaptive filtration aperture is adjusted and controlled in real time, making the dissolution and filtration process more efficient and effective, thereby indirectly improving the crystallization effect in the carbon source production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic flow chart of a data processing process of a crystallization device for carbon source production provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the crystallization equipment and control method for carbon source production proposed according to the present invention, its specific implementation mode, structure, characteristics and effects are described in detail as follows in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment, and the specific features, structures or characteristics in one or more embodiments may be combined in any suitable form. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0042] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0043] The specific scheme of a crystallization device and a control method for carbon source production provided by the present invention is described in detail below with reference to the accompanying drawings.

[0044] The present application provides a crystallization device for carbon source production, including a control module, a concentration sensor, a turbidity sensor, a particle size analyzer, a second high-speed shear solid-liquid mixer, and a second motor. The patent document with publication number CN113457201A in the prior art discloses a continuous crystallization device. On the basis of the device, the present application installs the concentration sensor, the turbidity sensor, and the particle size analyzer in the high-speed shear solid-liquid mixer 3, that is, in the second high-speed shear solid-liquid mixer corresponding to the present application, and the motor 31 of the device corresponds to the second motor of the present application. The concentration sensor is used to collect the solute dissolution mass in the solution in the second high-speed shear solid-liquid mixer, the turbidity sensor is used to collect the turbidity of the solution in the second high-speed shear solid-liquid mixer, and the particle size analyzer is used to collect the particle size data of the solution particles in the solution in the second high-speed shear solid-liquid mixer. The concentration sensor, the turbidity sensor and the particle size analyzer are all connected to the control module through signals; the control module can be a data processing chip such as a CPU, an MCU, or a data processing device such as a computer host, and the corresponding output ends of the concentration sensor, the turbidity sensor and the particle size analyzer are connected to the input end of the control module, which can be achieved through a wired connection through a data transmission line, or through a wireless communication method such as Bluetooth and WiFi.

[0045] Then, with the help of the control module, the motor speed of the second motor and the aperture size of the filter device are controlled according to the predetermined data processing process to perform adaptive dissolution filtration. Figure 1 , which shows a schematic flow chart of a data processing process of a crystallization device for carbon source production provided by an embodiment of the present invention, comprising the following steps:

[0046] Step S101: in the second high-speed shear solid-liquid mixer, the solubility, turbidity and solution particle size data at each sampling time are obtained through a control module.

[0047] In a specific implementation of the embodiment of the present invention, the time interval between two adjacent sampling moments is set to 5 minutes, and the time interval can be adjusted at will; and in a specific implementation of the embodiment of the present invention, the solubility acquisition process includes: determining the solubility at each sampling moment according to the ratio between the solute dissolved mass and the solution solvent volume at each sampling moment; the solubility acquisition process is expressed by the formula: Among them, δ t is the solubility at the tth sampling moment; V 0 is the volume of the solution solvent, i.e., the upper limit of the solution storage capacity in the second high-speed shear solid-liquid mixer, which can be obtained a priori; g t is the mass of solute dissolved at the tth sampling moment. In addition, considering that the particle size analyzer will detect multiple solution particle size data, this application will subsequently use the mean of all solution particle size data detected at each sampling moment to participate in the calculation and analysis to improve the robustness of subsequent analysis.

[0048] Step S102: Determine the solute dissolution effect reference value at each sampling moment according to the solubility and turbidity time series changes at each sampling moment; determine the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment according to the stable changes of the solubility and the solute dissolution effect reference value at each sampling moment.

[0049] For the solution in the second high-speed shear solid-liquid mixer, the solubility and turbidity can reflect the dissolution of the solute. The larger the corresponding solubility, the better the solute dissolution effect; and the change in turbidity can indirectly reflect the change in solubility, so the solute dissolution effect reference value is determined in combination with the temporal changes of solubility and turbidity. Further, when the solute dissolution effect reference value is low, it usually corresponds to incomplete dissolution of the solute in the solvent, so it is necessary to increase the motor speed to promote dissolution; and when the solute dissolution effect reference value is high, it means that the solute dissolution effect in the solvent is good, and it has usually reached a saturated state; and after the solubility reaches a saturated state, continuing to increase the motor speed will not get a better dissolution effect, so it is necessary to adjust the motor speed downward to save energy; therefore, the present application determines the corrected motor speed according to the stable changes in the solubility and the solute dissolution effect reference value at each sampling moment; so that the corrected motor speed determines the minimum motor speed while ensuring a good dissolution effect, so that the effect of dissolution filtration with the corrected motor speed is better.

[0050] Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the solute dissolution effect reference value includes:

[0051] The difference between the solubility at each sampling moment and the prior standard solubility is used as the solubility standard deviation at each sampling moment; the turbidity influence weight at each sampling moment is determined according to the size of the solubility standard deviation and the instantaneous change of turbidity at the corresponding sampling moment; the solubility standard deviation and the turbidity influence weight are used to determine the solute dissolution effect reference value at each sampling moment; the solubility standard deviation and the turbidity influence weight are both positively correlated with the solute dissolution effect reference value. In a specific implementation of an embodiment of the present invention, the prior standard solubility is set to 0.95 times the static solubility at the same temperature and pressure and in a saturated state. The size of the prior standard solubility can be adjusted at will, but it is necessary to ensure that the prior standard solubility is less than the static solubility at the same temperature and pressure and in a saturated state, and it needs to be as close to the solubility in the saturated state as possible. It should be noted that the purpose of setting the prior standard solubility less than the solubility in the saturated state is to provide conditions for the subsequent reduction of the motor speed, and the purpose of setting the prior standard solubility as close as possible to the solubility in the saturated state is to make the dissolution as sufficient as possible.

[0052] Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the turbidity influence weight includes:

[0053] Each sampling moment is taken as the target moment in turn; when the solubility standard deviation at the target moment is greater than 0, the difference between the turbidity at the target moment and the turbidity at the previous sampling moment is negatively correlated and mapped to determine the turbidity impact weight at the target moment; when the solubility standard deviation at the target moment is less than or equal to 0, the turbidity impact weight at the target moment is set to a preset constant. When the solubility standard deviation is greater than 0, that is, when the corresponding solubility is greater than the prior standard solubility, it means that the solubility is high at this time and tends to saturation; if the turbidity decreases relative to the previous sampling moment, it means that the solubility is decreasing at this time, so the solubility reduction is considered through the turbidity impact weight, so that the solute dissolution effect reference value obtained to characterize the dissolution effect is more accurate. In a specific implementation of an embodiment of the present invention, the preset constant is set to 1, so that the solubility standard deviation is less than or equal to 0, that is, when the solubility at the target moment is less than the prior standard solubility, the turbidity influence weight is set to the preset constant, so as to achieve the purpose of measuring the solute dissolution effect reference value only by the solubility standard deviation when the solubility is less than the prior standard solubility; so that the measured dissolution effect is more reasonable, that is, when the solubility is less than the prior standard solubility, the dissolution effect is measured only by the solubility size.

[0054] In a specific implementation of the embodiment of the present invention, the process of obtaining the turbidity influence weight is expressed by the formula: Among them, Z t is the turbidity influence weight at the t-th sampling moment; D t is the turbidity at the tth sampling moment; D t-1 is the turbidity at the t-1th sampling time, that is, the turbidity at the sampling time before the tth sampling time; δ t is the solubility at the tth sampling moment; δ ′ is the prior standard solubility; exp() is an exponential function with a natural constant as the base. According to the function curve of 1-exp(x), when the value of x is greater than 0, the overall value of 1-exp(x) is negative, and the larger the value of x is, the smaller the overall value of 1-exp(x). Combined with the subsequent acquisition process of the reference value of the solute dissolution effect, it is very consistent with the objective fact that the more the turbidity is reduced, the worse the corresponding dissolution effect is.

[0055] Preferably, in some possible implementations of the embodiments of the present invention, the process of determining the reference value of the solute dissolution effect at each sampling time according to the solubility standard deviation and the turbidity influence weight includes: normalizing the product between the solubility standard deviation and the turbidity influence weight to determine the reference value of the solute dissolution effect at each sampling time. In the embodiment of the present invention, when the solubility at the target time is less than the prior standard solubility, the corresponding turbidity influence weight is 1, so that the calculated reference value of the solute dissolution effect is only related to the solubility.

[0056] In a specific implementation of the embodiment of the present invention, the process of obtaining the reference value of the solute dissolution effect is expressed by the formula: t =Norm((δ t -δ ′ )×Z t );R t is the reference value of solute dissolution effect at the tth sampling moment; δ t is the solubility at the tth sampling moment; δ ′ is the a priori standard solubility; δ t -δ ′ is the solubility standard deviation at the tth sampling moment; Z t is the turbidity influence weight at the t-th sampling moment; Norm() is the linear normalization function.

[0057] Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the corrected motor speed includes:

[0058] The minimum speed value of the second high-speed shear solid-liquid mixer under the working state is obtained; the corrected motor speed at the previous sampling moment of each sampling moment is used as the first reference motor speed at each sampling moment; the product between the normalized value of the negative correlation mapping value of the solubility standard deviation at each sampling moment and the minimum speed value is used as the speed adjustment value at each sampling moment; the sum of the first reference motor speed and the speed adjustment value is used as the second reference motor speed at each sampling moment. First, when the solubility is low, that is, the solubility is lower than the prior standard solubility, it means that the mixing is incomplete at this time and the solubility has not reached saturation, so the motor speed is increased to increase the rate of reaching saturation. The larger the absolute value of the corresponding solubility standard deviation is, the smaller its specific value is, indicating that the lower the solubility is, the more incomplete the mixing is, and the larger the required motor speed is; therefore, the solubility standard deviation is negatively correlated with the motor speed adjustment value; that is, the smaller the solubility standard deviation is, the larger the corresponding motor speed adjustment value is; and the motor speed before adjustment at each sampling moment is usually the motor speed at the previous sampling moment, so on the basis of the first reference motor speed combined with the motor speed adjustment value, the second reference speed that may need to be adjusted is determined. It should be noted that the minimum value of the rotational speed in the embodiment of the present invention is the minimum value of the rotational speed in the working state, and its value is greater than 0.

[0059] In a specific implementation of the embodiment of the present invention, the process of obtaining the motor speed adjustment value is expressed by the formula: Δω t =ω min ×Sigmod(-(δ t -δ ′ )); where Δω t is the speed adjustment value at the tth sampling moment; ω min is the minimum speed of the second high-speed shear solid-liquid mixer in working state; δ t is the solubility at the tth sampling moment; δ ′ is the a priori standard solubility; δ t -δ ′ is the solubility standard deviation at the tth sampling moment; Sigmod() is a normalization function whose value range after normalization is [-1,1].

[0060] Further, the corrected motor speed at each sampling moment is determined according to the stability of the change of the solute dissolution effect reference value in the time sequence and the first reference motor speed and the second reference motor speed. That is, it is necessary to further determine whether to use the first reference motor speed or the second reference motor speed as the corrected motor speed according to the stability of the change of the solute dissolution effect reference value. Preferably, in some possible implementation methods of the embodiments of the present invention, according to the real-time change of the solute dissolution effect reference value in the time sequence and the first reference motor speed and the second reference motor speed, determining the corrected motor speed at each sampling moment includes:

[0061] For any real-time sampling moment:

[0062] The difference between the solute dissolution effect reference value corresponding to the real-time sampling moment and the previous solute dissolution effect reference value is used as the solute dissolution effect change value corresponding to the real-time sampling moment; when the solute dissolution effect change value is greater than or equal to the preset effect threshold, the second reference motor speed is used as the corrected motor speed at the corresponding real-time sampling moment; when the solute dissolution effect change value is less than the preset effect threshold, the first reference motor speed at the previous sampling moment of the real-time sampling moment is used as the corrected motor speed at the real-time sampling moment; based on the corrected motor speed at the real-time sampling moment, the corrected motor speed at each sampling moment is determined.

[0063] In a specific implementation of an embodiment of the present invention, the preset effect threshold is set to 0, which can be adjusted according to the specific implementation environment; before the solubility reaches saturation, the solubility will gradually increase, and the corresponding solute dissolution effect reference value will also gradually increase. At this time, when the second reference motor speed is used as the correction motor speed, the corresponding speed will continue to increase. After the solubility is greater than the prior standard solubility, according to the determination process of the correction motor speed, the motor speed will continue to decrease; further, after the motor speed continues to decrease to a certain extent, the speed will not meet the speed requirement of the prior standard solubility. At this time, the turbidity will increase, resulting in a certain degree of decrease in the solute dissolution effect reference value. Therefore, the first reference motor speed at the previous sampling moment is used as the corresponding correction motor speed, so as to determine the motor speed that is as small as possible when the solubility is large. In other possible implementations of the embodiment of the present invention, when the first reference motor speed is used as the correction motor speed for the first time, the correction motor speed of all subsequent sampling moments adopts the first reference motor speed; because when the first reference motor speed is used as the correction motor speed for the first time, the corresponding first reference motor speed is the motor speed that is as small as possible when the solubility is large, so the subsequent adjustment of the correction motor speed can achieve a better dissolution and filtration effect.

[0064] Step S103: adjusting the aperture of the filter device according to the solution particle size data and turbidity at each sampling moment, determining the adaptive filtering aperture at each sampling moment; and performing adaptive dissolution filtering according to the corrected motor speed and the adaptive filtering aperture.

[0065] Regarding the aperture of the filter device, a large aperture can increase the flow rate of the solution, but it will cause more smaller impurities to pass through, reducing the purity of the crystallized material. A small aperture can improve the filtering effect on impurities, but it will cause the flow rate of the solution to decrease, reducing the crystallization efficiency. Therefore, it is necessary to determine the adaptive filtration aperture at each sampling time according to the specific state of the solution to meet different filtration aperture requirements. The particle size data and turbidity of the solution at different sampling times are different, and the corresponding filtration difficulty is also different, resulting in a certain difference in the size of the required filtration aperture.

[0066] Preferably, in some possible implementations of the embodiments of the present invention, the process of acquiring the adaptive filtering aperture includes:

[0067] Normalize the product of the mean of all solution particle size data measured at each sampling moment and the turbidity to determine the filtration difficulty at each sampling moment; determine the adaptive filtration aperture at each sampling moment based on the filtration difficulty and the maximum filtration aperture of the filtration device. The mean of the solution particle size data represents the overall size of the particle size. The larger the particles in the solution, the higher the filtration difficulty; and the turbidity represents the density of the solution particles. The larger the solution particle size, the higher the corresponding filtration difficulty; therefore, the greater the filtration difficulty obtained by combining the solution particle size data and turbidity, the smaller the aperture of the required filtration device should be set; therefore, the filtration difficulty is negatively correlated with the adaptive filtration aperture; the maximum filtration aperture is positively correlated with the adaptive filtration aperture. Preferably, in some possible implementation methods of the embodiments of the present invention, the process of determining the adaptive filtration aperture at each sampling moment based on the filtration difficulty and the maximum filtration aperture of the filtration device includes:

[0068] The product of the negative correlation mapping value of the filtering difficulty and the maximum filtering aperture of the filtering device is used as the adaptive filtering aperture at each sampling moment. In a specific implementation of the embodiment of the present invention, the process of obtaining the adaptive filtering aperture is expressed by the formula: Among them, W t is the adaptive filtering aperture at the tth sampling moment; W max D is the maximum pore size of the filter device; t is the turbidity at the tth sampling moment; is the mean value of all solution particle size data collected at the t-th sampling time; Norm() is a linear normalization function;

[0069] is the filtering difficulty at the t-th sampling moment. The value of the filtering difficulty is limited to 0 to 1 through the normalization function, so that the maximum value of the filtering aperture is combined with the adjustment range of the filtering aperture to make an adaptive adjustment that is more in line with objective facts.

[0070] Finally, a more efficient and better adaptive dissolution filtration is performed with the corrected motor speed and adaptive filter aperture at each sampling moment. After the dissolution filtration stage, the solution is input into the tubular crystallizer, and the tubular crystallizer is cooled by a cooling jacket to perform continuous crystallization of the carbon source. The mother liquor after crystallization and separation in the tubular crystallizer is re-input into the first high-speed shear solid-liquid mixer through a pipeline for recycling. The first high-speed shear solid-liquid mixer, that is, the patent document with publication number CN113457201A, discloses a high-speed shear solid-liquid mixer 1 in a continuous crystallization device.

[0071] The present application also provides a crystallization equipment control method for carbon source production, comprising the following steps:

[0072] In the second high-speed shear solid-liquid mixer, the solubility, turbidity, and solution particle size data at each sampling time are obtained through the control module;

[0073] According to the solubility and turbidity time series changes at each sampling moment, the solute dissolution effect reference value at each sampling moment is determined; according to the solubility and the solute dissolution effect reference value stable changes at each sampling moment, the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment is determined;

[0074] The aperture of the filter device is adjusted according to the solution particle size data and turbidity at each sampling moment to determine the adaptive filtering aperture at each sampling moment; adaptive dissolution filtering is performed according to the corrected motor speed and the adaptive filtering aperture.

[0075] Since the specific steps of a method for controlling a crystallization device for carbon source production have been described in detail in the above-mentioned embodiment of a crystallization device for carbon source production, they will not be further described.

[0076] To summarize, after combining the solubility and turbidity to determine the dissolution effect reference value characterizing the dissolution effect, the present application combines the stable change of the dissolution effect reference value and the solubility to determine the smallest possible corrected motor speed that meets the solubility requirement; and further combines the solution particle size data and turbidity in the dimension of filtration difficulty to determine the adaptive filter aperture that better meets the filtration requirements at each sampling moment; thereby combining the corrected motor speed and the adaptive filter aperture to perform a more efficient and better dissolution filtration process.

[0077] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0078] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A crystallization device for carbon source production, It is characterized in that It includes a control module, a concentration sensor, a turbidity sensor, a particle size analyzer, a second high-speed shear solid-liquid mixer and a second motor; the concentration sensor, the turbidity sensor, the particle size analyzer and the second motor are all located in the second high-speed shear solid-liquid mixer, the concentration sensor is used to collect the solute dissolution mass in the solution in the second high-speed shear solid-liquid mixer, the turbidity sensor is used to collect the turbidity of the solution in the second high-speed shear solid-liquid mixer, the particle size analyzer is used to collect the particle size data of the solution in the second high-speed shear solid-liquid mixer, and the concentration sensor, the turbidity sensor and the particle size analyzer are all connected to the control module by signal; in the second high-speed shear solid-liquid mixer, the solubility, turbidity and solution particle size data at each sampling time are obtained through the control module; According to the solubility and turbidity time series changes at each sampling moment, the solute dissolution effect reference value at each sampling moment is determined; according to the solubility and the solute dissolution effect reference value stable changes at each sampling moment, the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment is determined; The aperture of the filter device is adjusted according to the solution particle size data and turbidity at each sampling moment to determine the adaptive filtering aperture at each sampling moment; and adaptive dissolution filtering is performed according to the modified motor speed and the adaptive filtering aperture.

2. A crystallization device for carbon source production according to claim 1, It is characterized in that The solubility acquisition process includes: The solubility at each sampling moment is determined based on the ratio between the dissolved mass of the solute and the volume of the solution solvent at each sampling moment.

3. A crystallization device for carbon source production according to claim 1, It is characterized in that The process of obtaining the solute dissolution effect reference value includes: The difference between the solubility at each sampling moment and the prior standard solubility is taken as the solubility standard deviation at each sampling moment; Determine the turbidity influence weight at each sampling time according to the size of the solubility standard deviation and the instantaneous change of turbidity at the corresponding sampling time; According to the solubility standard deviation and the turbidity influence weight, the solute dissolution effect reference value at each sampling time is determined; the solubility standard deviation and the turbidity influence weight are both positively correlated with the solute dissolution effect reference value.

4. A crystallization device for carbon source production according to claim 3, It is characterized in that The process of obtaining the turbidity influence weight includes: Take each sampling moment as the target moment in turn; When the solubility standard deviation at the target time is greater than 0, the difference between the turbidity at the target time and the turbidity at the previous sampling time is negatively correlated to determine the turbidity influence weight at the target time; When the solubility standard deviation at the target time is less than or equal to 0, the turbidity influence weight at the target time is set to a preset constant.

5. A crystallization device for carbon source production according to claim 3, It is characterized in that The process of determining the solute dissolution effect reference value at each sampling time according to the solubility standard deviation and the turbidity influence weight includes: The product of the solubility standard deviation and the turbidity influence weight is normalized to determine the solute dissolution effect reference value at each sampling time.

6. A crystallization device for carbon source production according to claim 3, It is characterized in that The process of obtaining the corrected motor speed includes: Obtain the minimum speed value of the second high-speed shear solid-liquid mixer in the working state; use the corrected motor speed at the sampling moment before each sampling moment as the first reference motor speed at each sampling moment; use the product between the normalized value of the negative correlation mapping value of the solubility standard deviation at each sampling moment and the minimum speed value as the speed adjustment value at each sampling moment; use the sum of the first reference motor speed and the speed adjustment value as the second reference motor speed at each sampling moment; The corrected motor speed at each sampling moment is determined according to the stability of the change in the solute dissolution effect reference value in time sequence and the first reference motor speed and the second reference motor speed.

7. A crystallization device for carbon source production according to claim 6, It is characterized in that The determining of the corrected motor speed at each sampling time according to the real-time change of the solute dissolution effect reference value in the time sequence and the first reference motor speed and the second reference motor speed comprises: For any real-time sampling moment: The difference between the solute dissolution effect reference value corresponding to the real-time sampling moment and the previous solute dissolution effect reference value is used as the solute dissolution effect change value corresponding to the real-time sampling moment; When the solute dissolution effect change value is greater than or equal to a preset effect threshold, the second reference motor speed is used as the corrected motor speed at the corresponding real-time sampling moment; When the solute dissolution effect change value is less than a preset effect threshold, the first reference motor speed at a sampling moment before the real-time sampling moment is used as the corrected motor speed at the real-time sampling moment; The corrected motor speed at each sampling moment is determined according to the corrected motor speed at the real-time sampling moment.

8. A crystallization device for carbon source production according to claim 1, It is characterized in that The process of obtaining the adaptive filtering aperture includes: Normalizing the product of the mean value of all solution particle size data measured at each sampling time and the turbidity to determine the filtration difficulty at each sampling time; According to the filtering difficulty and the maximum filtering aperture of the filtering device, the adaptive filtering aperture at each sampling moment is determined; the filtering difficulty is negatively correlated with the adaptive filtering aperture; the maximum filtering aperture is positively correlated with the adaptive filtering aperture.

9. A crystallization device for carbon source production according to claim 8, It is characterized in that The process of determining the adaptive filtering aperture at each sampling moment according to the filtering difficulty and the maximum filtering aperture of the filtering device includes: The product of the negative correlation mapping value of the filtering difficulty and the maximum filtering aperture of the filtering device is used as the adaptive filtering aperture at each sampling moment.

10. A method for controlling a crystallization device for carbon source production, It is characterized in that The following steps are involved: In the second high-speed shear solid-liquid mixer, the solubility, turbidity, and solution particle size data at each sampling time are obtained through the control module; According to the solubility and turbidity time series changes at each sampling moment, the solute dissolution effect reference value at each sampling moment is determined; according to the solubility and the solute dissolution effect reference value stable changes at each sampling moment, the corrected motor speed of the second high-speed shear solid-liquid mixer at each sampling moment is determined; The aperture of the filter device is adjusted according to the solution particle size data and turbidity at each sampling moment to determine the adaptive filtering aperture at each sampling moment; and adaptive dissolution filtering is performed according to the modified motor speed and the adaptive filtering aperture.

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