Micro-boiling state temperature control system for PH detection of carbon black slurry

Abstract

The invention provides a micro-boiling state temperature control system for PH detection of carbon black slurry, which belongs to the technical field of temperature control and comprises a control device, a temperature detection device and a heating stirrer. The heating stirrer is used for uniformly stirring and heating to-be-detected carbon black slurry; the temperature detection device is used for detecting the temperature of the uniformly stirred and heated carbon black slurry; the control device is used for keeping the heating stirrer to heat for a preset duration at the preset micro-boiling temperature and then stopping heating when the temperature reaches the preset micro-boiling temperature, the carbon black slurry can be more uniform in the heating process through the heating stirrer, the temperature difference of each part of slurry is smaller in the heating process, the boiling consistency is further kept, and the heating efficiency is improved. And when the control device is at the preset micro-boiling temperature, the heating stirrer is kept to heat for the preset time at the preset micro-boiling temperature and then stops heating, so that the evaporation of the slurry can be reduced, and the accuracy of the final PH detection result is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature control, in particular to a micro-boiling state temperature control system for carbon black slurry PH detection. BACKGROUND

[0002] The carbon black PH detection generally adopts the method of mixing the carbon black sample with water in the proportion of 1:10, and then measuring after boiling for 15 min and cooling. The test device includes a glass beaker, an electric heating plate and a PH meter.

[0003] However, the current detection method has problems such as uneven boiling and evaporation loss, resulting in relatively poor accuracy of the final PH detection result. SUMMARY

[0004] The present application provides a micro-boiling state temperature control system for carbon black slurry PH detection, which solves the problem of uneven boiling and evaporation loss of the carbon black slurry in the existing temperature control system, and the defect of poor PH detection accuracy.

[0005] In a first aspect, the present application provides a micro-boiling state temperature control system for carbon black slurry PH detection, comprising: a control device, a temperature detection device and a heating stirrer.

[0006] The heating stirrer is used to uniformly stir and heat the carbon black slurry to be detected.

[0007] The temperature detection device is used to detect the temperature of the uniformly stirred and heated carbon black slurry.

[0008] The control device is used to keep the heating stirrer heating at the preset micro-boiling temperature for a preset time length and then stop heating when the temperature reaches the preset micro-boiling temperature.

[0009] According to the micro-boiling state temperature control system for carbon black slurry PH detection provided by the present application, the control device is further used to:

[0010] Statistical historical carbon black slurry data samples;

[0011] Determine the preset micro-boiling temperature through the historical carbon black slurry data samples and the accuracy rate of the PH detection result.

[0012] According to the micro-boiling state temperature control system for carbon black slurry PH detection provided by the present application, the control device is further used to:

[0013] Determine the weight of the carbon black slurry to be detected;

[0014] Input the weight into the weight-speed curve, and output the stirring speed of the heating stirrer.

[0015] The control device is further used for:

[0016] Setting carbon black slurry samples with different weights;

[0017] Based on the carbon black slurry samples with different weights, gradually increasing stirring tests are respectively performed;

[0018] Collecting slurry images during the stirring tests and determining the gray values of the slurry images;

[0019] When the difference between the gray values of the slurry images at different target positions is less than a preset value, it is determined that the slurry stirring is uniform, and the carbon black slurry sample weight and the corresponding rotational speed sample at this time are recorded;

[0020] The weight-rotational speed curve is constructed by using the carbon black slurry sample weight and the corresponding rotational speed sample.

[0021] The control device is further used for:

[0022] Determining the slurry bottom layer, the slurry middle layer and the slurry upper layer corresponding to the slurry images;

[0023] Three points in the slurry bottom layer, two points in the slurry middle layer and one point in the slurry upper layer are determined as target positions.

[0024] The control device is further used for:

[0025] Determining the working parameters of the heating stirrer corresponding to the carbon black slurry when the preset micro-boiling temperature is reached;

[0026] The working parameters are maintained to continue heating the carbon black slurry reaching the preset micro-boiling temperature for fifteen minutes and then stop heating.

[0027] The micro-boiling state temperature control method for carbon black slurry PH detection provided by the application further comprises:

[0028] After the heating stirrer stops heating, when the temperature of the cooled carbon black slurry is detected to be reduced to a detection temperature, a detection prompt is issued to perform PH value detection.

[0029] The micro-boiling state temperature control system for carbon black slurry PH detection provided by the application, the heating stirrer comprises a magnetic stirring part and a heating part;

[0030] The magnetic stirring part is used for driving the stirring sub placed in the carbon black slurry to be detected to rotate through an external magnetic field.

[0031] The heating part is used for generating heat by the built-in heating element and conducting the heat to the bottom of the container to heat the carbon black slurry to be detected.

[0032] The micro-boiling state temperature control system for PH detection of carbon black slurry provided by the application comprises a control device and a temperature detection device.

[0033] The micro-boiling state temperature control system for PH detection of carbon black slurry provided by the application comprises a control device and a temperature detection device.

[0034] The micro-boiling state temperature control system for PH detection of carbon black slurry provided by the application comprises a control device and a temperature detection device. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0036] Figure 1 is the structural schematic diagram of the micro-boiling state temperature control system for PH detection of carbon black slurry provided by the embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely in the following combined with the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0038] Figure 1Schematic diagram of the structure of the micro-boiling state temperature control system for carbon black slurry pH detection provided in this embodiment.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a micro-boiling state temperature control system for carbon black slurry pH detection, comprising: a control device 1, a temperature detection device 2 and a heating stirrer 3; the heating stirrer 3 is used to uniformly stir and heat the carbon black slurry to be detected; the temperature detection device 2 is used to detect the temperature of the carbon black slurry after uniform stirring and heating; the control device 1 is used to keep the heating stirrer 3 at the preset micro-boiling temperature for a preset time and then stop heating when the temperature reaches a preset micro-boiling temperature.

[0040] In a specific implementation, control device 1 utilizes a PID controller. A PID (proportional, integral, differential) controller is the core component of the temperature control system, adjusting heating power in real time based on temperature information fed back by the temperature sensor. The PID controller's response time is less than 0.5 seconds, effectively ensuring that the carbon black system maintains a constant, slightly boiling state in a fluctuating thermal environment. After optimization, the PID algorithm can effectively reduce overshoot and ensure temperature stability within the desired range.

[0041] Temperature detection device 2 uses a PT1000 temperature sensor. The choice of temperature sensor is crucial, and in this application, the PT1000 is suitable for high-precision temperature control systems. Its high measurement accuracy of ±0.1°C ensures accurate temperature control of the carbon black and mother liquor even in a slightly boiling state. The sensor's response speed also meets the requirement for rapid temperature adjustment in this state.

[0042] The heating stirrer 3 uses a magnetic heating stirrer 3, which mainly includes a magnetic stirring part and a heating part. The magnetic stirring part is used to drive the stirring rod placed in the carbon black slurry to be detected to rotate through an external magnetic field. The rotation of the stirring rod drives the liquid to generate vortexes, thereby achieving uniform mixing. This stirring method does not require direct contact with the liquid, avoiding the pollution and wear problems that may be caused by traditional mechanical stirring. The heating part is used to generate heat through a built-in heating element and conduct it to the bottom of the container to heat the carbon black slurry to be detected. The heating part is usually made of aluminum alloy or stainless steel and has good thermal conductivity. A heating element (such as a resistance wire) is installed under the heating plate. When powered on, it generates heat and transfers the heat to the bottom of the container through heat conduction, thereby heating the liquid.

[0043] like Figure 1 As shown, the carbon black slurry is placed inside the beaker, and the temperature sensor collects the temperature of the carbon black slurry in the beaker and feeds the temperature value back to the controller. The controller controls the start and stop of the heating stirrer 3 according to the temperature.

[0044] The specific process of carbon black slurry pH test is:

[0045] 1. Sample preparation: Weigh (5.00 ± 0.01) g carbon black + (50 ± 0.1) ml deionized water;

[0046] 2. Temperature control start: Set the target temperature to 200°C and start the dynamic power adjustment mode;

[0047] 3. State maintenance: When the temperature fluctuation is greater than 0.5°C, the controller adjusts the power according to ΔP = Kp × e(t) + Ki∫e(t)dt (PID parameters: Kp = 2.5, Ki = 0.1 / s);

[0048] 4. pH determination: After cooling to 25°C, measure using the GB / T 3780.7-2016 method;

[0049] Among them, the key parameters involved in the whole process include temperature, heating power and micro-boiling maintenance time. The setting range of micro-boiling temperature is between 97-99°C, preferably 98°C, and the control accuracy is ±0.3°C. The heating power is between 200-350W, and the control accuracy is 5W level adjustment. After reaching the set micro-boiling temperature, the heating time is maintained between 15±0.5min, and electronic timing is used for precision control. Among them, regarding the control of the heating agitator 3, manual adjustment can be adopted, and automatic control can also be adopted.

[0050] During the test, the heated stirrer 3 achieves uniform stirring of the carbon black slurry, ensuring uniformity across the different layers of the slurry and, in turn, temperature consistency. This allows the temperature sensor to more accurately collect temperature data. Furthermore, the uniformity across the different layers of the slurry ensures consistency during the final boiling point. Furthermore, by maintaining a slightly boiling temperature of 98°C, the impact of boiling evaporation on the pH test results is reduced, ensuring the accuracy of the final test results.

[0051] Furthermore, based on the above embodiment, the control device 1 in this embodiment is also used to: count historical carbon black slurry data samples; determine the preset micro-boiling temperature through historical carbon black slurry data samples and the accuracy of pH test results.

[0052] Specifically, historical pH test results are statistically analyzed. The historical carbon black slurry data samples may include test results at different micro-boiling temperatures. The slurry weight changes at different micro-boiling states are then recorded. The micro-boiling temperature corresponding to the data with the smallest slurry mass change, i.e., the least evaporation, and the most accurate pH test results is used as the preset micro-boiling temperature. In this embodiment, the preset micro-boiling temperature is 98 degrees Celsius. The preset micro-boiling temperature obtained through historical data analysis ensures that boiling is achieved while minimizing evaporation, thereby ensuring the accuracy of the final pH test results.

[0053] Further, the control device 1 in this embodiment is also used to: set carbon black slurry samples of different weights; based on the carbon black slurry samples of different weights, respectively perform stirring tests with gradually increasing rotation speeds; collect slurry images during the stirring tests, and determine the gray values of the slurry images; determine the slurry bottom layer, the slurry middle layer and the slurry upper layer corresponding to the slurry images; determine three points in the slurry bottom layer, two points in the slurry middle layer and one point in the slurry upper layer as target positions. When the difference between the gray values of the slurry images at different target positions is less than a preset value, it is determined that the slurry is stirred uniformly, and the weight of the carbon black slurry sample at this time and the corresponding rotation speed sample are recorded; based on the weight of the carbon black slurry sample and the corresponding rotation speed sample, a weight-rotation speed curve is constructed. The weight of the carbon black slurry to be detected is determined; the weight is input to the weight-rotation speed curve, and the stirring speed of the heating stirrer 3 is output.

[0054] Specifically, for slurry of different mass volumes, the required rotation speed is also different if uniform mixing is to be achieved. Therefore, in order to match the most reasonable rotation speed of any mass volume of carbon black slurry, it is necessary to first establish a weight-rotation speed curve, that is, after obtaining the weight of the carbon black slurry, the best rotation speed can be automatically matched, which not only ensures the uniformity of the slurry, but also avoids the problem of slurry spilling caused by too fast rotation speed.

[0055] Therefore, in order to better construct the weight-rotation speed curve, carbon black slurry samples of different weights are set. Since the ratio of carbon black slurry is certain, the weight of carbon black slurry is different when the carbon black is different. In order to ensure the accuracy of the results, the preset number of carbon black slurry samples can be configured with an accuracy of 0.1 g. Then, after the carbon black slurry is configured, the stirring is gradually performed with step-by-step increasing rotation speed. In the process of continuously increasing the rotation speed, the slurry photos are continuously collected, and whether the stirring is uniform is determined by the gray values of the slurry images. Specifically, whether the stirring is uniform is determined by the difference in gray values at different positions of the slurry image. Due to the characteristics of the slurry, the slurry image is divided into three layers, three points are determined in the lower layer, two points are determined in the middle layer, and one point is determined in the upper layer as the target position. Whether the stirring is uniform is determined by the gray values of the target positions. If the difference between the gray values at each position is within the error range, it means that the stirring is uniform, otherwise the stirring is not uniform.

[0056] After determining that the carbon black slurry is stirred uniformly, the weight of the carbon black slurry at this time and the corresponding rotation speed are recorded, and the test data of all carbon black slurry samples of different weights are recorded, thereby obtaining the corresponding weight-rotation speed curve. The determination of stirring uniformity by gray value can better ensure the accuracy of the results compared with subjective factors. The constructed weight-rotation speed curve can quickly match the target rotation speed according to the weight of the carbon black slurry, thereby ensuring the rationality of the rotation speed.

[0057] Further, on the basis of the above-mentioned embodiment, the control device 1 in the embodiment is further used for: determining the working parameter of the heating stirrer 3 corresponding to the carbon black slurry reaching the preset micro-boiling temperature; and stopping heating after the working parameter continues to heat the carbon black slurry reaching the preset micro-boiling temperature for fifteen minutes. After the heating stirrer 3 stops heating, when the temperature of the cooled carbon black slurry is detected to be reduced to the detection temperature, a detection prompt is sent to perform PH value detection.

[0058] Specifically, carbon black usually presents as fine particles, and has poor dispersibility in liquid. The heating stirrer 3 can effectively uniformly stir the carbon black suspension, and ensure that the composition and PH value of each part of the slurry are consistent. In this way, measurement errors caused by particle precipitation or stratification can be prevented. Due to the stable heating and stirring of the heating stirrer 3, the test conditions can be relatively consistent each time, and human errors can be reduced. This means that when multiple measurements are performed, the consistency of the results is higher, and the repeatability and reliability of the experiment are improved. Moreover, the heating is stopped after the micro-boiling for a preset time length, and then the PH value detection is performed after cooling to 25 degrees Celsius, which can also ensure the accuracy of the detection result. Moreover, the detection prompt is sent when the temperature is cooled to 25 degrees Celsius, which can also ensure that the detection can be performed in time.

[0059] The micro-boiling state temperature control system in the embodiment can provide precise temperature control support for the preparation of carbon black masterbatch through high-precision temperature sensing, fast-response PID control, precise adjustment of the heating assembly, and strong mixing of the stirring system, and ensure the safety during the reaction process through pressure monitoring. Through the optimized design, the influence of evaporation amount on the PH value is reduced, the operation is simple, and the degree of automation is high. The heating stirrer 3 has the benefits of uniformity and stability, which is crucial for the micro-boiling process and can maintain constant performance in a long time of work. It can meet different experimental needs and improve the stability and repeatability of the experiment.

[0060] The device embodiments described above are only schematic, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0061] Those skilled in the art can clearly understand the technical solutions of the various embodiments from the above description of the embodiments, and the various embodiments can be implemented by means of software with the necessary general hardware platforms, and of course, can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part of the prior art that makes a contribution, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A micro-boiling temperature control system for carbon black slurry pH detection, characterized in that: include: Control device, temperature detection device and heating stirrer; The heating stirrer is used to uniformly stir and heat the carbon black slurry to be tested; The temperature detection device is used to detect the temperature of the carbon black slurry after uniform stirring and heating; The control device is used for stopping heating after the temperature reaches a preset micro-boiling temperature and maintaining the heating stirrer at the preset micro-boiling temperature for a preset time.

2. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 1, characterized in that: The control device is also used for: Statistical historical carbon black slurry data samples; The preset micro-boiling temperature is determined based on the historical carbon black slurry data sample and the accuracy of the pH test results.

3. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 1, characterized in that: The control device is also used for: Determining the weight of the carbon black slurry to be tested; The weight to weight-rotation speed curve is input and the stirring speed of the heating stirrer is output.

4. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 3, characterized in that: The control device is also used for: Set up carbon black slurry samples with different weights; Based on the carbon black slurry samples of different weights, stirring tests with gradually increasing rotation speeds were performed respectively; collecting a slurry image during the stirring test and determining a grayscale value of the slurry image; When the difference between the grayscale values ​​of the slurry image at different target positions is less than a preset value, it is determined that the slurry is stirred uniformly, and the weight of the carbon black slurry sample and the corresponding rotation speed sample at this time are recorded; A weight-rotation speed curve is constructed using the weight of the carbon black slurry sample and the corresponding rotation speed sample.

5. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 4, characterized in that: The control device is also used for: determining a slurry bottom layer, a slurry middle layer, and a slurry upper layer corresponding to the slurry image; Three points are determined in the bottom layer of the slurry, two points are determined in the middle layer of the slurry, and one point is determined in the upper layer of the slurry as target positions.

6. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 1, characterized in that: The control device is also used for: Determining the operating parameters of the heating stirrer corresponding to when the carbon black slurry reaches the preset slight boiling temperature; The heating is continued for fifteen minutes while maintaining the working parameters and the carbon black slurry is heated to the preset micro-boiling temperature, and then the heating is stopped.

7. The micro-boiling state temperature control system for carbon black slurry pH detection according to claim 1, characterized in that: Also includes: After the heating stirrer stops heating, when it is detected that the temperature of the cooled carbon black slurry drops to the detection temperature, a detection prompt is issued to perform pH value detection.

8. The micro-boiling state temperature control system for carbon black slurry pH detection according to any one of claims 1 to 7, characterized in that: The heating stirrer includes a magnetic stirring part and a heating part; The magnetic stirring part is used to drive a stirrer placed in the carbon black slurry to be tested to rotate through an external magnetic field; The heating part is used to generate heat through a built-in heating element and conduct it to the bottom of the container to heat the carbon black slurry to be tested.

9. The micro-boiling state temperature control system for carbon black slurry pH detection according to any one of claims 1 to 7, characterized in that: The control device is a PID controller, and the temperature detection device is a PT1000 temperature sensor.

10. The micro-boiling state temperature control system for carbon black slurry pH detection according to any one of claims 1 to 7, characterized in that: The preset micro-boiling temperature is 98 degrees Celsius.

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