Rectification and purification device and method for producing high-purity sulfur dioxide

Abstract

The invention relates to the technical field of sulfur dioxide purification, in particular to a rectification and purification device and method for high-purity sulfur dioxide production, and the method comprises the following steps: in a sulfur dioxide rectification and purification process, forming a temperature vector by temperatures at adjacent positions at all moments in a rectification tower; analyzing the similarity between each temperature vector at each moment and an adjacent temperature vector, and determining a temperature similarity coefficient at each moment; based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period of the current moment, determining the temperature adaptation degree of the current moment; and adjusting the heating temperature of the rectifying tower at the current moment through the dispersion degree and the change trend of the air pressure of the rectifying tower in the historical time period at the current moment in combination with the temperature adaptation degree to obtain the heating temperature of the rectifying tower at the next moment. Therefore, the purification effect of sulfur dioxide is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sulfur dioxide purification, and in particular to a distillation purification device and method for producing high-purity sulfur dioxide. Background Art

[0002] Sulfur dioxide (SO₂) is a colorless, pungent gas widely used in the chemical industry, particularly in the production of sulfuric acid. Its presence in the environment is linked to acid rain and air pollution, and its emissions are therefore strictly regulated. Industrial applications often require high-purity sulfur dioxide, making distillation a crucial step in its production.

[0003] The distillation process for sulfur dioxide purification relies on its low boiling point. Distillation towers utilize the differences in boiling points between different substances to separate sulfur dioxide from mixed gases. However, temperatures inside the distillation tower that are too high or too low can affect the sulfur dioxide purification process. If the temperature is too high, sulfur dioxide may form azeotropes with other components, preventing effective separation and affecting the final sulfur dioxide purity. If the temperature is too low, the sulfur dioxide's evaporation rate slows, resulting in reduced distillation efficiency.

[0004] In the existing technology for the distillation and purification of sulfur dioxide, a fixed preset temperature is often used in the distillation tower. However, in actual operation, the temperature of the distillation tower is affected by multiple factors, such as fluctuations in the heat source, the effectiveness of the cooling system, pressure changes, etc. The fixed preset temperature has problems such as insufficient adaptability and low accuracy, which affects the purification effect of sulfur dioxide. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of this application is to provide a distillation purification device and method for producing high-purity sulfur dioxide. The technical solutions adopted are as follows: In a first aspect, the present invention provides a method for the distillation and purification of high-purity sulfur dioxide, the method comprising the following steps: During the distillation and purification of sulfur dioxide, the temperature at each longitudinal position in the distillation tower at each time is collected, and the gas pressure and sulfur dioxide content at each time in the distillation tower are collected; The temperatures of adjacent positions in the distillation tower at each moment are combined into temperature vectors, and the similarity between each temperature vector and its adjacent temperature vectors at each moment is analyzed to determine the temperature similarity coefficient at each moment; Determining the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment; The heating temperature of the distillation tower at the current moment is adjusted by the discrete degree and change trend of the gas pressure in the historical time period at the current moment, combined with the temperature adaptability, to obtain the heating temperature of the distillation tower at the next moment.

[0006] In one embodiment, forming a temperature vector from the temperatures of adjacent positions in the distillation tower at each moment includes: At each moment, the temperature collection positions in the distillation tower are numbered in ascending order from top to bottom, and the temperature of each numbered position and the temperature of the position with the next adjacent numbered position form a temperature vector for each numbered position.

[0007] In one embodiment, determining the temperature similarity coefficient includes: The similarity of the temperature vectors of each serial number position and its adjacent next serial number position is calculated, and the average of all the similarities at each moment is used as the temperature similarity coefficient at each moment.

[0008] In one embodiment, the similarity is the cosine similarity of the temperature vectors of each serial number position and its adjacent next serial number position.

[0009] In one embodiment, determining the temperature adaptability includes: All the temperature similarity coefficients in the historical time period at the current moment are combined into a temperature similarity sequence, and all the sulfur dioxide contents in the historical time period at the current moment are combined into a sulfur dioxide content sequence; The temperature adaptability is the Pearson correlation coefficient between the temperature similarity sequence and the sulfur dioxide content sequence.

[0010] In one embodiment, obtaining the heating temperature of the distillation tower at the next moment includes: Performing a linear fit on all the air pressures in the historical time period at the current moment to obtain the slope of the fitted line; The heating temperature of the distillation tower at the current moment is adjusted in combination with the slope, the discrete degree, and the temperature adaptability to obtain the heating temperature of the distillation tower at the next moment.

[0011] In one embodiment, obtaining the heating temperature of the distillation tower at the next moment comprises: The ratio of the discrete degree to the temperature adaptability is calculated, and the product of the signed result of the slope and the normalized value of the ratio is determined. The heating temperature of the distillation tower at the next moment is negatively correlated with the product.

[0012] In one embodiment, the heating temperature of the distillation tower at the next moment is the difference between the heating temperature of the distillation tower at the current moment and the product.

[0013] In one embodiment, the degree of dispersion is the standard deviation of all the air pressures in the historical time period at the current moment.

[0014] In a second aspect, the embodiment of the present application further provides a distillation and purification device for producing high-purity sulfur dioxide, the distillation and purification device comprising a sulfur dioxide cylinder (1), which is sequentially connected to a precooler (2), an adsorption bed (3), a filter (4), a liquefier (5), and finally connected to the bottom of a distillation tower (7), the upper part of the distillation tower (7) is connected to a heat exchanger (8), and the sulfur dioxide purified by heat exchange condensation is led to a high-purity sulfur dioxide product storage tank (10), a refrigerator (6) is connected between the liquefier (5) and the heat exchanger (8), an emptying channel (9) is provided at the top of the heat exchanger (8), and is connected to an alkali solution absorption device (11), and the distillation tower (7) comprises: Temperature sensor, used to collect the temperature at each longitudinal position in the distillation tower at each time; Pressure sensor, used to collect the air pressure in the distillation tower at each moment; Sulfur dioxide detector, used to collect the sulfur dioxide content in the distillation tower at each moment; The temperature control module is used to combine the temperatures of adjacent positions in the distillation tower at each moment into temperature vectors, analyze the similarity between each temperature vector and its adjacent temperature vectors at each moment, and determine the temperature similarity coefficient at each moment; Determining the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment; The heating temperature of the distillation tower at the current moment is adjusted by the discrete degree and change trend of the gas pressure in the historical time period at the current moment, combined with the temperature adaptability, to obtain the heating temperature of the distillation tower at the next moment.

[0015] This application has at least the following beneficial effects: The application improves the identification precision of the temperature distribution uniformity in the rectifying tower, captures the local temperature anomaly in the rectifying tower in real time, and avoids the defect that single-point temperature measurement is not sensitive to temperature gradient distribution. Further, based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period of the current time, the temperature adaptation degree of the current time is determined. The determination of the temperature adaptation degree strengthens the associated adaptation of the temperature in the rectifying tower and the sulfur dioxide content, reflects the appropriate degree of the heating temperature in the rectifying tower at the current time, improves the robustness of the sulfur dioxide purity control, and improves the reliability of the temperature control in the rectifying tower. By adjusting the heating temperature of the rectifying tower at the current time through the dispersion degree and the change trend of the gas pressure in the historical time period of the current time in combination with the temperature adaptation degree, the heating temperature of the rectifying tower at the next time is obtained, the accuracy of the temperature control in the rectifying tower is improved, the volatilization behavior of each component in the rectifying tower is ensured to meet the expectation, the separation process of sulfur dioxide is more efficient, the purity of the purified sulfur dioxide is ensured, and higher-quality sulfur dioxide is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 A step flow chart of a rectification purification method for high-purity sulfur dioxide production provided by an embodiment of the present application is shown in the following table. Figure 2 A schematic diagram of a rectification purification device for high-purity sulfur dioxide production is shown in the following table. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following describes the specific implementation, structure, features and effects of a rectification purification device and method for high-purity sulfur dioxide production according to the present application in combination with the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0019] 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 application belongs.

[0020] The following describes in detail a specific scheme of a distillation purification device and method for producing high-purity sulfur dioxide provided by the present application in conjunction with the accompanying drawings.

[0021] See also Figure 1 , which shows a flow chart of the steps of a distillation purification method for producing high-purity sulfur dioxide provided by one embodiment of the present application, the method comprising the following steps: S1, during the process of distillation and purification of sulfur dioxide, the temperature at each longitudinal position in the distillation tower at each time is collected, and the gas pressure and sulfur dioxide content in the distillation tower at each time are collected.

[0022] During the sulfur dioxide distillation and purification process, to collect data during the distillation process and improve the purity of the distilled sulfur dioxide, this embodiment evenly deploys N temperature sensors from top to bottom of the distillation tower to obtain real-time temperature distribution within the tower. Furthermore, a pressure sensor is deployed in the middle of the distillation tower to obtain real-time pressure within the tower. Furthermore, a sulfur dioxide detector is used to obtain real-time sulfur dioxide content within the distillation tower.

[0023] It should be noted that, in this embodiment, the number of temperature sensors is set to N=8, and the temperature, air pressure, and sulfur dioxide content in the distillation tower are all collected synchronously. In this embodiment, the collection time interval is set to 30s. The implementer can set the collection time interval and the number of sensors according to actual conditions, and this embodiment does not impose any restrictions on this.

[0024] The N temperature sensors are numbered in sequence from top to bottom in the distillation tower starting from the natural number 1, that is, the temperature sensor at the top of the distillation tower is numbered 1, and the next temperature sensor closest to the top temperature sensor is numbered 2. Accordingly, the serial numbers of the temperature sensors in the distillation tower can be obtained.

[0025] S2, the temperatures of adjacent positions in the distillation tower at each moment are combined into temperature vectors, the similarity between each temperature vector and its adjacent temperature vectors at each moment is analyzed, and the temperature similarity coefficient at each moment is determined.

[0026] The main principle of purifying sulfur dioxide from the mixed condensate in a distillation tower is: utilizing the difference in boiling points of different substances in the mixed liquid, the low-boiling-point components are heated and volatilized during the heating process, while the high-boiling-point components are not easy to volatilize, so that the concentration of low-boiling-point components in the gas phase gradually increases, and the concentration of high-boiling-point components in the liquid phase increases, thereby purifying sulfur dioxide.

[0027] During the distillation process, the temperature of the distillation tower determines the distribution ratio of each component in the gas and liquid phases. By leveraging the difference in boiling points, the rising vapor gradually contacts the reflux liquid in the tower in a countercurrent manner, partially condensing the heavy components in the gas phase and partially vaporizing the light components in the liquid phase. This purifies the light components in the gas phase and the heavy components in the liquid phase. Liquefied sulfur dioxide primarily contains oxygen and nitrogen. Compared to sulfur dioxide, liquefied sulfur dioxide is a light component with a much lower boiling point, so it vaporizes preferentially. Carbon dioxide also exists, which normally forms an azeotrope with sulfur dioxide, making separation more difficult. Precise temperature control within the distillation tower is required under pressure control.

[0028] Based on the above analysis, precise temperature control is required during the sulfur dioxide distillation and purification process to ensure that the temperature at each location in the distillation tower adapts to the gas-liquid balance and mass transfer requirements, while maintaining the heat balance of the entire distillation tower. First, for a single sampling moment, since the temperature between the various plate layers in the distillation tower basically presents a stable gradient distribution, and the gradient distribution between the various plate layers is basically consistent, it is conducive to the efficient separation of impurities during multiple contacts between the gas and liquid phases. However, when affected by the differences in reflux ratio and evaporation volume between the various plate layers, the greater the overall deviation, the lower the consistency of the temperature distribution in the distillation tower, which will affect the sulfur dioxide purification effect.

[0029] Therefore, at each moment, the temperature of each serial number and the position of the next adjacent serial number in this embodiment constitute a temperature vector at each serial number position. For example, the values ​​of temperature sensors No. 1 and No. 2 constitute one temperature vector, and the values ​​of temperature sensors No. 2 and No. 3 constitute another temperature vector. These two temperature vectors are adjacent temperature vectors. Similarly, at each moment, N temperature sensors can obtain N-1 temperature vectors.

[0030] The similarity between each temperature vector and its adjacent temperature vectors at each moment is analyzed to determine the temperature similarity coefficient at each moment. In this embodiment, the specific calculation method is as follows: , where A represents the temperature similarity coefficient at each moment, N represents the number of temperature sensors in the distillation tower, and cos() represents the cosine similarity calculation function. and Represent the i-th and i+1-th temperature vectors at each moment respectively.

[0031] It should be understood that this embodiment uses temperature vectors to measure the temperature characteristics of the corresponding plate layers represented by two adjacent temperature sensors in the distillation tower. The similarity of adjacent temperature vectors reflects the degree of inconsistency in the temperature distribution within the distillation tower. The higher the consistency of the overall temperature distribution gradient within the distillation tower, the larger the cosine similarity value obtained. The more chaotic the overall temperature distribution, the smaller the cosine similarity value obtained. Therefore, the temperature similarity coefficient at each sampling time can be obtained.

[0032] S3: Determine the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment.

[0033] The temperature similarity coefficient at a single moment reflects the degree of consistency of the temperature in the distillation tower at a single sampling moment. Therefore, in theory, the higher the uniformity of the temperature gradient from top to bottom in the distillation tower, the more conducive it is to the separation of light components and heavy components in the gas-liquid phases of sulfur dioxide, causing the concentration content of sulfur dioxide components in the mixed liquid to gradually increase.

[0034] Thus, for the current moment, the temperature similarity coefficients for each moment in the historical time period at the current moment and the sulfur dioxide content in the distillation tower are obtained, and all the temperature similarity coefficients in the historical time period at the current moment are organized into a temperature similarity sequence in chronological order, and all the sulfur dioxide contents in the historical time period at the current moment are organized into a sulfur dioxide content sequence in chronological order. In this embodiment, the implementer can set the length of the historical time period for the first 5 minutes of the current moment in the historical time period according to actual circumstances, and this embodiment does not impose any restrictions on this. It should be noted that for moments when the historical time period is insufficient, in order to ensure the reliability of the temperature control in the distillation tower, the temperature control of the distillation tower is not performed at such moments.

[0035] To avoid the impact of numerical values ​​on the calculation, the temperature similarity sequence and sulfur dioxide content sequence obtained at the current moment are normalized using the maximum-minimum method. The Pearson correlation coefficient of the normalized temperature similarity sequence and sulfur dioxide content sequence at the current moment is used as the temperature adaptability at the current moment. The maximum-minimum method and the Pearson correlation coefficient are both well-known technologies. Implementers can choose other feasible normalization methods and correlation calculation methods, such as Z-score normalization and cosine similarity, and this embodiment does not impose any restrictions on this.

[0036] For temperature adaptation degree measurement, the focus is on the influence of the temperature distribution in the rectifying tower on the purification effect of sulfur dioxide. In theory, the stronger the gradient consistency of the temperature distribution in the rectifying tower, the more conducive to the purification of sulfur dioxide in the rectifying tower, and the higher the purity obtained, and therefore the stronger the correlation between the temperature similarity sequence and the sulfur dioxide content sequence, indicating that the temperature adaptation degree in the rectifying tower is higher. Conversely, the greater the temperature fluctuation, the less conducive to the purification of sulfur dioxide in the rectifying tower, and the smaller the correlation between the temperature similarity sequence and the sulfur dioxide content sequence, and the smaller the value of the temperature adaptation degree obtained.

[0037] S4, adjusting the heating temperature of the rectifying tower at the current moment by the dispersion degree and the change trend of the gas pressure in the rectifying tower in the historical time period of the current moment, in combination with the temperature adaptation degree, to obtain the heating temperature of the rectifying tower at the next moment.

[0038] The above analysis process mainly aims at the temperature in the rectifying tower and the content of sulfur dioxide, to measure the adaptation degree of the temperature to the purification of sulfur dioxide in the rectifying tower. However, in the actual process, as the light components in the mixed liquid are gradually separated, the pressure value in the rectifying tower fluctuates slightly, and the pressure fluctuation will affect the temperature distribution in the rectifying tower, which may reduce the temperature difference between the plate layers in the rectifying tower, showing a false appearance of temperature consistency, resulting in a deviation of the obtained temperature adaptation degree from the actual situation. The embodiment further analyzes the pressure value in the rectifying tower, specifically: For the current moment, the pressure in the rectifying tower at each moment in the historical time period of the current moment is obtained, and all the pressure values in the rectifying tower in the historical time period of the current moment are arranged in time sequence to form a pressure sequence. The greater the fluctuation degree of the pressure data in the historical time period, the greater the deviation of the temperature adaptation degree from the actual sulfur dioxide rectification and purification effect, and the more correction is needed.

[0039] Based on the above analysis, the embodiment adjusts the heating temperature in the rectifying tower in real time by the change trend and dispersion degree of the pressure sequence, in combination with the temperature adaptation degree, and the specific expression is: ; in the formula, represents the target temperature value to be adjusted in the rectifying tower at t+1 moment, represents the heating temperature in the rectifying tower at the current t moment, sign() represents the sign function, that is, the positive and negative of the numerical value, represents the slope of the fitting straight line obtained by linear fitting of the pressure sequence at the current t moment, norm() represents the normalization function, and C represents the temperature adaptation degree at the current t moment, Indicates the degree of dispersion of the pressure series at the current time t. The degree of dispersion can be calculated using variance, standard deviation, coefficient of variation, and other methods. This embodiment uses standard deviation as the method for calculating the degree of dispersion. This embodiment uses the least squares method for linear fitting of the pressure series. Implementers may choose other available linear fitting algorithms.

[0040] Thus, this embodiment can obtain the heating temperature of the distillation tower at the next moment from the current moment, thereby achieving real-time regulation of the heating temperature in the distillation tower.

[0041] When regulating the temperature within the distillation tower, the first consideration is the tower temperature's adaptability to sulfur dioxide purification. The higher the degree of adaptability at the current moment, the better the match between the current tower temperature distribution and the sulfur dioxide purification requirements, and the less temperature control is needed. In the presence of pressure fluctuations, however, the higher the temperature adaptability, the more likely it is a false adaptation, where neither the tower temperature nor the purity increases. Therefore, the fluctuations in the pressure sequence are used to control the step size of the temperature adjustment.

[0042] In addition, the direction of adjusting the heating temperature in the distillation tower mainly considers the gradual change of the pressure sequence at the current moment. If the pressure sequence shows an increasing trend, it means that the pressure value in the distillation tower is gradually increasing, which may lead to a large pressure value in the distillation tower, which is not conducive to the separation of light components at the top of the distillation tower and may cause some light components to be re-pressed into the mixed solution. Therefore, at this time, it is necessary to gradually reduce the pressure in the distillation tower by lowering the temperature. Conversely, if the pressure in the distillation tower gradually decreases, in order to break the azeotropic state of sulfur dioxide and carbon dioxide, it is necessary to increase the heating temperature of the distillation tower to break the equilibrium state of the gas-liquid two phases and promote purification.

[0043] Based on the same inventive concept as the above method, an embodiment of the present application also provides a distillation and purification device for the production of high-purity sulfur dioxide, wherein the distillation and purification device includes a sulfur dioxide cylinder 1, wherein the sulfur dioxide is industrially prepared and the purity is mainly between 99.6% and 99.9%. The sulfur dioxide cylinder 1 is connected in sequence to a precooler 2, four adsorption beds 3, a filter 4, a liquefier 5, and finally to the bottom of a distillation tower 7, wherein the four adsorption beds are connected to each other in series through pipes and valves to form a multiple adsorption bed group; a heat exchanger 8 with an internal low-temperature cold liquid is connected to the upper part of the distillation tower 7, and the sulfur dioxide after heat exchange, condensation and purification is led to a high-purity sulfur dioxide product storage tank 10, a refrigerator 6 is connected between the liquefier 5 and the heat exchanger 8, and an emptying channel 9 is provided on the top of the heat exchanger 8, which is connected to an alkali solution absorption device 11 to achieve exhaust gas absorption. After multiple purifications, the purity of the sulfur dioxide in the high-purity sulfur dioxide product storage tank 10 is 99.9998%, meeting the 5N grade industrial requirements for preparation. In addition, the distillation tower 7 also includes: Temperature sensor, used to collect the temperature at each longitudinal position in the distillation tower at each time; Pressure sensor, used to collect the air pressure in the distillation tower at each moment; Sulfur dioxide detector, used to collect the sulfur dioxide content in the distillation tower at each moment; The temperature control module is used to combine the temperatures of adjacent positions in the distillation tower at each moment into temperature vectors, analyze the similarity between each temperature vector and its adjacent temperature vectors at each moment, and determine the temperature similarity coefficient at each moment; Determining the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment; By combining the discrete degree and change trend of the gas pressure in the historical time period at the current moment with the temperature adaptability, the heating temperature of the distillation tower at the current moment is adjusted to obtain the heating temperature of the distillation tower at the next moment. Figure 2 shown.

[0044] It should be noted that the order in which the embodiments of the present application are presented is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. Furthermore, the foregoing descriptions of specific embodiments of this specification are provided. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential sequence shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0045] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A distillation purification method for producing high-purity sulfur dioxide, characterized in that: The method comprises the following steps: During the distillation and purification of sulfur dioxide, the temperature at each longitudinal position in the distillation tower at each time is collected, and the gas pressure and sulfur dioxide content at each time in the distillation tower are collected; The temperatures of adjacent positions in the distillation tower at each moment are combined into temperature vectors, and the similarity between each temperature vector and its adjacent temperature vectors at each moment is analyzed to determine the temperature similarity coefficient at each moment; Determining the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment; The heating temperature of the distillation tower at the current moment is adjusted by the discrete degree and change trend of the gas pressure in the historical time period at the current moment, combined with the temperature adaptability, to obtain the heating temperature of the distillation tower at the next moment.

2. The distillation purification method for producing high-purity sulfur dioxide according to claim 1, characterized in that: The step of forming a temperature vector from the temperatures of adjacent positions in the distillation tower at each moment includes: At each moment, the temperature collection positions in the distillation tower are numbered in ascending order from top to bottom, and the temperature of each numbered position and the temperature of the position with the next adjacent numbered position form a temperature vector for each numbered position.

3. The distillation purification method for producing high-purity sulfur dioxide according to claim 2, characterized in that: Determination of the temperature similarity coefficient includes: The similarity of the temperature vectors of each serial number position and its adjacent next serial number position is calculated, and the average of all the similarities at each moment is used as the temperature similarity coefficient at each moment.

4. The distillation purification method for producing high-purity sulfur dioxide according to claim 3, characterized in that: The similarity is the cosine similarity of the temperature vectors of each serial number position and its adjacent next serial number position.

5. The distillation purification method for producing high-purity sulfur dioxide according to claim 1, characterized in that: The determination of the temperature adaptability includes: All the temperature similarity coefficients in the historical time period at the current moment are combined into a temperature similarity sequence, and all the sulfur dioxide contents in the historical time period at the current moment are combined into a sulfur dioxide content sequence; The temperature adaptability is the Pearson correlation coefficient between the temperature similarity sequence and the sulfur dioxide content sequence.

6. The distillation purification method for producing high-purity sulfur dioxide according to claim 1, characterized in that: The obtaining of the heating temperature of the distillation tower at the next moment comprises: Performing a linear fit on all the air pressures in the historical time period at the current moment to obtain the slope of the fitted line; The heating temperature of the distillation tower at the current moment is adjusted in combination with the slope, the discrete degree, and the temperature adaptability to obtain the heating temperature of the distillation tower at the next moment.

7. The distillation purification method for producing high-purity sulfur dioxide according to claim 6, characterized in that: The step of obtaining the heating temperature of the distillation tower at the next moment comprises: The ratio of the discrete degree to the temperature adaptability is calculated, and the product of the signed result of the slope and the normalized value of the ratio is determined. The heating temperature of the distillation tower at the next moment is negatively correlated with the product.

8. The distillation purification method for producing high-purity sulfur dioxide according to claim 7, characterized in that: The heating temperature of the distillation tower at the next moment is the difference between the heating temperature of the distillation tower at the current moment and the product.

9. The distillation purification method for producing high-purity sulfur dioxide according to claim 1, characterized in that: The degree of dispersion is the standard deviation of all the air pressures in the historical time period at the current moment.

10. A distillation and purification device for producing high-purity sulfur dioxide, realizing a distillation and purification method for producing high-purity sulfur dioxide as claimed in claim 1, wherein the distillation and purification device comprises a sulfur dioxide cylinder (1), which is sequentially connected to a precooler (2), an adsorption bed (3), a filter (4), a liquefier (5), and finally connected to the bottom of a distillation tower (7), the upper part of the distillation tower (7) is connected to a heat exchanger (8), and the sulfur dioxide purified by heat exchange condensation is led to a high-purity sulfur dioxide product storage tank (10), a refrigerator (6) is connected between the liquefier (5) and the heat exchanger (8), and an emptying channel (9) is provided on the top of the heat exchanger (8), which is connected to an alkali solution absorption device (11), characterized in that: The distillation tower (7) includes: Temperature sensor, used to collect the temperature at each longitudinal position in the distillation tower at each time; Pressure sensor, used to collect the air pressure in the distillation tower at each moment; Sulfur dioxide detector, used to collect the sulfur dioxide content in the distillation tower at each moment; The temperature control module is used to combine the temperatures of adjacent positions in the distillation tower at each moment into temperature vectors, analyze the similarity between each temperature vector and its adjacent temperature vectors at each moment, and determine the temperature similarity coefficient at each moment; Determining the temperature adaptability at the current moment based on the correlation between the temperature similarity coefficient and the sulfur dioxide content in the historical time period at the current moment; The heating temperature of the distillation tower at the current moment is adjusted by the discrete degree and change trend of the gas pressure in the historical time period at the current moment, combined with the temperature adaptability, to obtain the heating temperature of the distillation tower at the next moment.

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