Sulfur trioxide removal rate measurement method and system, computer device and storage medium

Abstract

The present application relates to the technical field of gas cooperative treatment, and discloses a sulfur trioxide removal rate calculation method and system, computer equipment and a storage medium, comprising: obtaining a first removal rate of sulfur dioxide and a second removal rate of sulfur trioxide under a wet desulfurization reference state; calculating a removal rate ratio constant according to the first removal rate and the second removal rate; obtaining a third removal rate of sulfur dioxide after the reference state is superimposed; and calculating a fourth removal rate of sulfur trioxide after the reference state is superimposed according to the third removal rate and the removal rate ratio constant. The present application takes the invariable reference state as the basis, adopts a logarithmic function as the main function, and proposes a removal rate calculation method which is consistent with the actual situation and has sufficient precision for engineering application, simplifies the calculation process and resource demand, and improves the calculation speed, thereby improving the design efficiency of engineering projects.

Description

Technical Field

[0001] This invention relates to the field of gas co-processing technology, and in particular to a method, system, computer equipment, and storage medium for calculating the sulfur trioxide removal rate of wet desulfurization flue gas. Background Technology

[0002] The fuel used in boilers contains sulfur, which produces sulfur dioxide gas upon combustion. Since sulfur dioxide is an acidic pollutant, there are strict limits on its emission concentration and total annual emission. Wet desulfurization is commonly used to remove sulfur dioxide. During flue gas washing, other pollutants in the flue gas, such as sulfur trioxide, are also washed away. Therefore, wet desulfurization can remove other pollutants simultaneously. By using wet desulfurization to remove sulfur dioxide, the concentration of downstream pollutants is reduced.

[0003] Currently, since wet desulfurization mainly guarantees the removal efficiency of sulfur dioxide, equipment manufacturers generally do not specifically design for sulfur trioxide. Therefore, they generally do not guarantee the removal efficiency of sulfur trioxide, nor do they specify the removal efficiency. However, since the actual project design requires the sulfur trioxide removal efficiency to be obtained in advance in order to evaluate the scheme or formulate the system scheme, the design work cannot be carried out when the equipment manufacturer cannot provide and guarantee the sulfur trioxide removal efficiency.

[0004] In actual operation, the removal efficiencies of sulfur dioxide and sulfur trioxide differ, and their relationship is not a simple linear one. When using numerical simulation to predict the sulfur trioxide removal rate, the accuracy of the simulation depends on the accuracy of the model. However, current research on the particle size distribution of wet desulfurization spray droplets and the droplet formation mechanism of sulfur trioxide condensation is insufficient, making it difficult to verify the model's accuracy. Furthermore, modeling based on actual operating conditions results in a very large number of particles. Simulating the random movement of these particles would lead to computational demands exceeding the computing power of a typical computer, resulting in extremely long solution times and even computational overflow. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a method, system, computer equipment, and storage medium for calculating sulfur trioxide removal rate. By determining the correlation between sulfur trioxide removal efficiency and sulfur dioxide, the invention avoids the problems of numerical modeling and large computational resource consumption in existing technologies, thereby achieving the goal of rapid calculation of sulfur trioxide removal rate.

[0006] In a first aspect, the present invention provides a method for calculating the sulfur trioxide removal rate, the method comprising:

[0007] Obtain the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the baseline conditions of wet desulfurization;

[0008] Based on the first removal rate and the second removal rate, a constant removal rate ratio is calculated.

[0009] Obtain the third removal rate of sulfur dioxide after superimposing the baseline conditions;

[0010] The fourth removal rate of sulfur trioxide after superimposing the baseline state is calculated based on the third removal rate and the constant ratio of the removal rate.

[0011] Furthermore, the removal rate ratio constant is calculated using the following formula:

[0012]

[0013] In the formula, k is a constant representing the removal rate ratio, and η D0 η represents the first removal rate. T0 This is the second removal rate.

[0014] Further, the specific steps for calculating the fourth removal rate of sulfur trioxide after superimposing the baseline states based on the third removal rate and the constant ratio of the removal rates include:

[0015] The first removal rate ratio constant is calculated based on the first removal rate and the second removal rate;

[0016] The second removal rate ratio constant is calculated based on the third removal rate and the fourth removal rate, wherein the fourth removal rate is the removal rate of sulfur trioxide after the superposition of the reference state;

[0017] The first removal rate ratio constant is equal to the second removal rate ratio constant, and the expression relationship of the fourth removal rate is obtained after conversion.

[0018] Furthermore, the expression relationship of the fourth removal rate is calculated using the following formula:

[0019]

[0020] In the formula, k is a constant representing the removal rate ratio, and η D The third removal rate, η T This is the fourth removal rate.

[0021] Secondly, the present invention provides a sulfur trioxide removal rate calculation system, the system comprising:

[0022] The first removal rate acquisition module is used to acquire the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the wet desulfurization baseline condition;

[0023] The constant calculation module is used to calculate a constant ratio of the removal rate based on the first removal rate and the second removal rate.

[0024] The second removal rate acquisition module is used to acquire the third removal rate of sulfur dioxide after the superposition of the baseline states;

[0025] The removal rate calculation module is used to calculate the fourth removal rate of sulfur trioxide after the superposition of the reference states based on the third removal rate and the constant ratio of the removal rate.

[0026] Furthermore, the removal rate ratio constant is calculated using the following formula:

[0027]

[0028] In the formula, k is a constant representing the removal rate ratio, and η D0 η represents the first removal rate. T0 This is the second removal rate.

[0029] Furthermore, the removal rate calculation module includes:

[0030] The first constant calculation module is used to calculate a first removal rate ratio constant based on the first removal rate and the second removal rate.

[0031] The second constant calculation module is used to calculate the second removal rate ratio constant based on the third removal rate and the fourth removal rate, wherein the fourth removal rate is the removal rate of sulfur trioxide after the superposition of the reference state.

[0032] The first removal rate calculation module is used to convert the first removal rate ratio constant to the second removal rate ratio constant, and then obtain the expression relationship of the fourth removal rate.

[0033] Furthermore, the expression relationship of the fourth removal rate is calculated using the following formula:

[0034]

[0035] In the formula, k is a constant representing the removal rate ratio, and η D The third removal rate, η T This is the fourth removal rate.

[0036] Thirdly, embodiments of the present invention also provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method.

[0037] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the above-described method.

[0038] The present invention provides a method, system, computer equipment, and storage medium for calculating sulfur trioxide removal rate. Using the method, based on the removal efficiencies of sulfur dioxide and sulfur trioxide under baseline conditions, the multi-stage removal effect after the superposition of multiple consecutive removal processes is analyzed to obtain a constant of the removal rate ratio. Using this constant as a benchmark, the theoretical result of the sulfur trioxide removal rate under any given sulfur dioxide removal rate condition can be calculated. This invention can be applied not only to wet desulfurization but also, and is not limited to, calculating the synergistic treatment efficiency of sulfur trioxide. For the absorption of two or more gases, the benchmark constant can be calculated based on the technical solution of this invention, thereby predicting the gas absorption results after changes in operating conditions through the benchmark constant. This is of great significance to the existing field of gas synergistic treatment. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating the method for calculating the sulfur trioxide removal rate provided in this embodiment of the invention.

[0040] Figure 2 This is a flowchart of step S40 in the diagram;

[0041] Figure 3 This is a schematic diagram of the sulfur trioxide removal rate calculation system provided in this embodiment of the invention;

[0042] Figure 4 This is an internal structural diagram of the computer device in an embodiment of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figure 1 The method for calculating the sulfur trioxide removal rate proposed in the first embodiment of the present invention includes steps S10 to S40:

[0045] Step S10: Obtain the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the wet desulfurization baseline conditions.

[0046] In wet desulfurization, the sulfur dioxide removal rate is based on the two-mode theory, which states that the mass transfer rate of SO2 on the gas phase side and the liquid phase side of the spray droplet interface determines the reaction rate. Under the same mass transfer conditions, the number of spray droplets determines the absorption area (surface area of ​​a single droplet × number of droplets). However, SO3 condenses into mist droplets when cooled in the reaction tower of wet desulfurization, and its reaction efficiency mechanism is different. The dominant factor is the collision probability between the spray droplets and SO3 mist droplets.

[0047] However, based on the above theory, it can be deduced that the greater the number of spray droplets and the larger the absorption area, the higher the SO2 removal efficiency. At the same time, the greater the number of droplets, the greater the probability of collision between the spray liquid and SO3 particles. Therefore, the removal efficiencies of SO2 and SO3 are positively correlated, but this function is not a simple linear relationship.

[0048] To this end, this invention proposes a hypothetical model in which the removal rates of sulfur dioxide and sulfur trioxide under the baseline state are first set, and then the next step of calculation is performed.

[0049] Step S20: Calculate the removal rate ratio constant based on the first removal rate and the second removal rate.

[0050] Assuming the removal rates of sulfur dioxide and sulfur trioxide under the baseline conditions of wet desulfurization are η and η, respectively. D0 and η T0 In other operating conditions, it is equivalent to the superposition of several reference states. When the superimposed or cascaded reference states are infinitely subdivided and then definite integrals are performed according to the actual operating conditions, the integral result is a logarithmic function with a constant term.

[0051] From a mathematical perspective, if multiple removal processes are superimposed consecutively and their efficiencies are multiplied consecutively, the overall efficiency will decrease. Therefore, mathematically, the effect of multi-stage removal should be calculated based on the proportion of residue after removal, or the penetration rate. That is, if the removal rate under the baseline condition is η, then the base proportion of residue for each stage should be 1-η. If m stages of the same process are connected in series, then the overall efficiency is 1-(1-η). m Therefore, based on η of the reference state D0 and η T0 Then the removal rate ratio constant k can be calculated, where,

[0052]

[0053] Step S30: Obtain the third removal rate of sulfur dioxide after superimposing the baseline state.

[0054] Step S40: Calculate the fourth removal rate of sulfur trioxide after superimposing the baseline states based on the third removal rate and the constant ratio of the removal rates.

[0055] After obtaining the removal rate ratio constant k, the removal rate of sulfur trioxide after superimposing the baseline conditions can be calculated based on the sulfur dioxide removal rate after superimposing the baseline conditions, combined with the removal rate ratio constant k. The specific steps are as follows: Figure 2 As shown:

[0056] Step S401: Calculate the first removal rate ratio constant based on the first removal rate and the second removal rate;

[0057] Step S402: Calculate the second removal rate ratio constant based on the third removal rate and the fourth removal rate, wherein the fourth removal rate is the removal rate of sulfur trioxide after superimposing the baseline state.

[0058] Step S403: The first removal rate ratio constant is equal to the second removal rate ratio constant, and the expression relationship of the fourth removal rate is obtained after conversion.

[0059] In the model of this embodiment of the invention, the operating conditions are set as a superposition of the baseline states. When the sulfur dioxide removal rate is adjusted to η D Afterwards, the removal rate of sulfur trioxide by synergistic treatment was η. T Since the removal rate ratio is a constant, therefore, based on η D0 and η T0 The calculated value of k should be equal to that based on η D and η T The calculated value of k indicates the existence of an equation:

[0060]

[0061] By performing a relational transformation on the above equation, we can obtain:

[0062]

[0063] Thus, η is obtained T The relationship between them is:

[0064]

[0065] In practical applications, it is only necessary to test the baseline state to obtain the k value, or to back-calculate the k value based on the measured total efficiency of the already operational equipment. Using the k value as a baseline, any given η can be calculated. D Under the condition of value, η T The theoretical results.

[0066] The technical solution of the present invention will be verified below with reference to specific embodiments:

[0067] Assuming the wet desulfurization process of the project has been guaranteed by the manufacturer with k = 6.4557, when the sulfur dioxide removal rate η D When the design value is 95%, the corresponding sulfur trioxide removal rate η can be calculated according to the technical solution of the present invention. T The predicted value is 37.13%, when η D When the design value is increased to 98%, the corresponding η T The predicted value is 45.45%, and this range of sulfur trioxide removal rate is consistent with the η value given in relevant literature. T The measured range is consistent with 30% to 50%, and η D With η T A positive correlation is shown in Table 1 below:

[0068] k value 6.4557 6.4557 6.4557 6.4557 6.4557 6.4557 6.4557 <![CDATA[η D ]]> 92 93 94 95 96 97 98 <![CDATA[η T ]]> 32.38 33.76 35.33 37.13 39.26 41.91 45.45

[0069] Table 1. Sulfur trioxide removal rate

[0070] The specific calculation process will not be discussed in detail here. Instead, we can infer it from the measured data of existing equipment. For different equipment, the k value is usually 3.3 to 6.5. When some equipment uses high-efficiency packing, the k value will be close to 1.5 to 2.0. However, for equipment using the same technology, the k value is approximately constant.

[0071] It should be noted that, based on the design concept of this invention, the calculation formula can be modified according to the actual situation of gas co-processing, while the basic design concept remains unchanged. Furthermore, practical verification shows that the technical solution of this invention is not only applicable to wet desulfurization, nor is it limited to calculating sulfur trioxide removal rate. For applications involving the absorption of two or more gases, as long as the efficiency values ​​of the two gases under a predetermined baseline are obtained, the k-value can be calculated according to the technical solution of this invention. The k-value can then be used to predict the results after changes in operating conditions. Therefore, the technical solution of this invention remains applicable even after changes in the application field, equipment structure and performance, and chemical reaction system. The calculation process for other gas co-processing can be performed with reference to the technical solution of this invention, and will not be elaborated upon here.

[0072] The sulfur trioxide removal rate calculation method provided in this invention is based on the premise that the baseline state remains unchanged. It follows an infinite subdivision and then definite integration, and the integration result is a logarithmic function with a constant term. Using the logarithmic function as the main function, any electronic computing tool can quickly obtain the result, and even engineers can manually calculate it using logarithmic tables. This avoids the resource consumption problems of numerical modeling and large-scale calculations. Moreover, the simplified model and algorithm can also be used in engineering control applications. It does not require additional computing resources for numerical modeling and simulation calculations, and can be suitable for the computing units of most control systems. It meets the time requirements of the feedback time segment, thereby improving the efficiency of project design.

[0073] Please see Figure 3 Based on the same inventive concept, the sulfur trioxide removal rate calculation system proposed in the second embodiment of the present invention includes:

[0074] The first removal rate acquisition module 10 is used to acquire the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the wet desulfurization baseline condition;

[0075] The constant calculation module 20 is used to calculate a constant removal rate ratio based on the first removal rate and the second removal rate.

[0076] The second removal rate acquisition module 30 is used to acquire the third removal rate of sulfur dioxide after the superposition of the baseline states;

[0077] The removal rate calculation module 40 is used to calculate the fourth removal rate of sulfur trioxide after the superposition of the reference states based on the third removal rate and the constant ratio of the removal rate.

[0078] The technical features and effects of the sulfur trioxide removal rate calculation system proposed in this embodiment of the invention are the same as those of the method proposed in this embodiment of the invention, and will not be repeated here. Each module in the above-mentioned sulfur trioxide removal rate calculation system can be implemented entirely or partially through software, hardware, or a combination thereof. Each module can be embedded in or independent of the processor in a computer device in hardware form, or it can be stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0079] Please see Figure 4 The diagram illustrates the internal structure of a computer device in one embodiment. This computer device can specifically be a terminal or a server. The computer device includes a processor, memory, network interface, display, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for calculating the sulfur trioxide removal rate. The display screen of the computer device can be a liquid crystal display (LCD) or an e-ink display. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0080] Those skilled in the art will understand that Figure 4The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computing devices may include more or fewer components than shown in the diagram, or combine certain components, or have the same component arrangement.

[0081] Furthermore, embodiments of the present invention also propose a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method.

[0082] Furthermore, embodiments of the present invention also propose a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method.

[0083] In summary, the sulfur trioxide removal rate calculation method, system, computer equipment, and storage medium proposed in this invention involve obtaining a first sulfur dioxide removal rate and a second sulfur trioxide removal rate under a wet desulfurization baseline state; calculating a constant removal rate ratio based on the first and second removal rates; obtaining a third sulfur dioxide removal rate after superimposing the baseline states; and calculating a fourth sulfur trioxide removal rate after superimposing the baseline states based on the third removal rate and the constant removal rate ratio. This method, based on an unchanged baseline state and using a logarithmic function as the main function, proposes a removal rate calculation method that conforms to actual trends and has sufficient accuracy for engineering applications. This method simplifies the calculation process and resource requirements, improves calculation speed, and thus improves the design efficiency of engineering projects.

[0084] The various embodiments in this specification are described in a progressive manner. For directly identical or similar parts of the embodiments, refer to each other. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0085] The embodiments described above are merely preferred embodiments of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various improvements and substitutions without departing from the technical principles of this invention, and these improvements and substitutions should also be considered within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the scope of the claims.

Claims

1. A method for calculating the sulfur trioxide removal rate, characterized in that, include: Obtain the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the baseline conditions of wet desulfurization; Based on the first removal rate and the second removal rate, a constant removal rate ratio is calculated. Obtain the third removal rate of sulfur dioxide after superimposing the baseline conditions; The fourth removal rate of sulfur trioxide after superimposing the baseline state is calculated based on the third removal rate and the constant ratio of the removal rate. The removal rate ratio constant is calculated using the following formula: In the formula, k is a constant representing the removal rate ratio. The first removal rate, The second removal rate; The specific steps for calculating the fourth removal rate of sulfur trioxide after superimposing the baseline states based on the third removal rate and the constant ratio of the removal rates include: The first removal rate ratio constant is calculated based on the first removal rate and the second removal rate; The second removal rate ratio constant is calculated based on the third removal rate and the fourth removal rate, wherein the fourth removal rate is the removal rate of sulfur trioxide after the superposition of the reference state; The first removal rate ratio constant is equal to the second removal rate ratio constant, and the expression relationship of the fourth removal rate is obtained after conversion. The expression relationship of the fourth removal rate is calculated using the following formula: In the formula, k is a constant representing the removal rate ratio. The third removal rate, This is the fourth removal rate.

2. A sulfur trioxide removal rate calculation system, characterized in that, include: The first removal rate acquisition module is used to acquire the first removal rate of sulfur dioxide and the second removal rate of sulfur trioxide under the wet desulfurization baseline condition; The constant calculation module is used to calculate a constant ratio of the removal rates based on the first removal rate and the second removal rate. The constant ratio of the removal rates is calculated using the following formula: In the formula, k is a constant representing the removal rate ratio. The first removal rate, The second removal rate; The second removal rate acquisition module is used to acquire the third removal rate of sulfur dioxide after the superposition of the baseline states; The removal rate calculation module is used to calculate the fourth removal rate of sulfur trioxide after the superposition of the reference states based on the third removal rate and the constant ratio of the removal rate. The removal rate calculation module includes: The first constant calculation module is used to calculate a first removal rate ratio constant based on the first removal rate and the second removal rate. The second constant calculation module is used to calculate the second removal rate ratio constant based on the third removal rate and the fourth removal rate, wherein the fourth removal rate is the removal rate of sulfur trioxide after the superposition of the reference state. The first removal rate calculation module is used to convert the first removal rate ratio constant to the second removal rate ratio constant, and then obtain the expression relationship of the fourth removal rate. The expression relationship of the fourth removal rate is calculated using the following formula: In the formula, k is a constant representing the removal rate ratio. The third removal rate, This is the fourth removal rate.

3. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method of claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method of claim 1.

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