Determination method and device for oxidation air volume of desulfurization slurry and computer equipment

Abstract

The invention relates to the technical field of desulfurization, in particular to a method and device for determining the oxidation air volume of desulfurization slurry and computer equipment, and the method for determining the oxidation air volume of desulfurization slurry solves the problem of regional intersection of a natural oxidation region and a forced oxidation region by re-dividing the natural oxidation region and the forced oxidation region. The natural oxidation rate and the forced oxidation rate cannot be independently measured on line. The first concentration of calcium sulfate in the slurry at the inlet of the slurry circulating pump, the second concentration of calcium sulfate in the slurry at the liquid level of the slurry pond and the third concentration of calcium sulfite in the slurry at the inlet of the slurry circulating pump are further obtained; according to the fourth concentration of calcium sulfite in the slurry at the liquid level of the slurry pond, zoned automatic assignment of the natural oxidation rate and the forced oxidation rate is realized, and the demand quantity of oxidation air can be calculated according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air quantity of the desulfurization slurry can be adjusted in real time according to detected data; the problem that the oxidation air volume control accuracy is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization, and particularly to a method, device and computer equipment for determining the oxidation air volume of desulfurization slurry. Background Art

[0002] SO2 in coal-fired flue gas has become the main cause of air pollution. The limestone-gypsum wet desulfurization process in coal-fired power plants is widely used. The reaction process of the absorbent limestone (CaCO3) and SO2 in the flue gas in the limestone-gypsum wet flue gas desulfurization process is as follows: Absorption reaction: SO2 reacts with water to generate a large amount of H + , making the solution acidic; Neutralization reaction: Limestone dissolves and consumes hydrogen ions to generate calcium ions; Oxidation reaction: Sulfite is oxidized HSO3-+O2→H++SO4 2- ; Gypsum crystallization: Under the condition of sufficient oxidation Ca 2+ +SO4 2- +2H2O→CaSO4·2H2O, under the condition of insufficient oxidation Ca 2+ +SO3 2- +H2O→CaSO3·H2O.

[0003] Among them, there are two ways of sulfite oxidation: one is to combine with the oxygen in the flue gas, which is called natural oxidation. The natural oxidation rate of the slurry in the absorption tower is mainly related to factors such as the oxygen content in the flue gas, the number of operating absorption tower circulation pumps, and the structure of the absorption tower. Among them, the oxygen content in the flue gas is mainly related to factors such as the boiler type, coal type, and combustion conditions; the other is to combine with the oxygen in the air blown by the oxidation fan in the absorption tower, which is called forced oxidation. The forced oxidation rate of the system varies under different inlet SO2 mass flow rates. The forced oxidation process is equipped with a desulfurization oxidation fan. The main function of the oxidation fan is to provide desulfurization oxidation air to oxidize calcium sulfite into calcium sulfate.

[0004] At present, the flexibility adjustment ability of desulfurization facilities is poor. Desulfurization oxidation fans mostly use industrial frequency roots blowers, and the air volume can only be adjusted by starting and stopping the fans. The air volume of a single fan cannot be adjusted according to the changes in the unit operating conditions (such as load, flue gas SO2 concentration changes), and there is a large energy-saving space. In order to improve the energy-saving effect of the oxidation fan, some power generation enterprises have taken measures such as frequency conversion transformation of roots blowers or replacing roots blowers with magnetic suspension variable frequency centrifugal fans, and obtained some energy-saving effects. However, the control accuracy of the oxidation air volume of the current oxidation fan is still poor. Summary of the Invention

[0005] In view of this, the present invention provides a method, device and computer equipment for determining the oxidation air volume of desulfurization slurry to solve the problem of poor control accuracy of the oxidation air volume of the oxidation fan.

[0006] In a first aspect, the present invention provides a method for determining the oxidation air volume of desulfurized slurry, comprising the following steps: obtaining a first concentration of calcium sulfate in the slurry at a first position, a second concentration of calcium sulfate in the slurry at a second position, a third concentration of calcium sulfite in the slurry at the first position, and a fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pool; calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; and calculating the required oxidation air volume based on the current natural oxidation rate and the current forced oxidation rate.

[0007] The method for determining the oxidation air volume of desulfurized slurry provided by the present invention, through the re - division of the natural oxidation area and the forced oxidation area, solves the problem of the intersection of the natural oxidation area and the forced oxidation area, and the problem that the natural oxidation rate and the forced oxidation rate cannot be measured online separately. Further, by obtaining the first concentration of calcium sulfate in the slurry at the inlet of the slurry circulation pump, the second concentration of calcium sulfate in the slurry at the liquid level of the slurry pool, the third concentration of calcium sulfite in the slurry at the inlet of the slurry circulation pump, and the fourth concentration of calcium sulfite in the slurry at the liquid level of the slurry pool, the automatic assignment of the natural oxidation rate and the forced oxidation rate in different areas is realized, and the required oxidation air volume can be calculated according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air volume of the desulfurized slurry can be adjusted in real time according to the detected data, and solves the problem of poor control accuracy of the oxidation air volume of the oxidation fan.

[0008] In an optional embodiment, calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration includes: calculating the current natural oxidation rate according to the first concentration, the second concentration, and the fourth concentration using a preset first formula; the first formula is: where η 自然 represents the current natural oxidation rate, y1 represents the first concentration, y2 represents the second concentration, and x2 represents the fourth concentration; calculating the current forced oxidation rate according to the third concentration and the fourth concentration using a preset second formula; the second formula is: where η 强制 represents the current forced oxidation rate, x1 represents the third concentration, and x2 represents the fourth concentration.

[0009] Based on the re - division of the natural oxidation zone and the forced oxidation zone, the current natural oxidation rate and the current forced oxidation rate can be accurately obtained according to the first concentration, the second concentration, the third concentration, and the fourth concentration. It should be noted that the current natural oxidation rate changes with the number of slurry circulation pumps started. When the number of slurry circulation pumps started increases from one to multiple, the current natural oxidation rate gradually increases. Online dynamic assignment of the natural oxidation rate can address the problem of inaccurate air volume control caused by fluctuations in the natural oxidation rate due to changes in the number of slurry circulation pumps started. The re - division of the natural oxidation zone and the forced oxidation zone in the embodiments of the present invention also realizes accurate air volume control when the number of operating slurry circulation pumps changes by solving the problem of regional intersection.

[0010] In an alternative embodiment, after calculating the oxidation air demand based on the current natural oxidation rate and the current forced oxidation rate, the following steps are further included: determining whether the third concentration is greater than a preset first threshold; when the third concentration is greater than the first threshold, obtaining the current liquid level of the absorption tower; obtaining the oxidation air adjustment amount based on the third concentration and the current liquid level, and adjusting the oxidation air demand according to the oxidation air adjustment amount.

[0011] This can make the calculated oxidation air demand more accurate.

[0012] In an alternative embodiment, the method for determining the oxidation air volume of the desulfurization slurry further includes the following steps: when the number of calcium sulfite meters at the first position is multiple, the third concentration is the average value of the measurement values of multiple calcium sulfite meters; when the number of calcium sulfite meters at the second position is multiple, the fourth concentration is the average value of the measurement values of multiple calcium sulfite meters.

[0013] This can make the third concentration and the fourth concentration more accurate, thereby making the finally obtained oxidation air demand more accurate.

[0014] In an alternative embodiment, before calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration, it further includes: obtaining the operation signal of the calcium sulfite meter; determining whether the calcium sulfite meter is operating normally according to the operation signal; when the calcium sulfite meter is operating normally, performing the calculation of the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; and / or; obtaining the detection data of the dissolved oxygen meter; determining whether the calcium sulfite meter is operating normally according to the detection data; when the calcium sulfite meter is operating normally, performing the calculation of the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration.

[0015] This can avoid inaccurate calculation of the oxidation air demand caused by abnormal calcium sulfite meters.

[0016] In an alternative embodiment, the method for determining the oxidation air volume of the desulfurization slurry further includes the following steps: when the calcium sulfite meter operates abnormally, obtain a preset first historical data set, a second historical data set, and the actual number of slurry circulation pumps in the operating state; wherein the first historical data set includes various first theoretical numbers of the slurry circulation pumps in the operating state, and the corresponding historical natural oxidation rates respectively corresponding to each first theoretical number; the second historical data set includes various second theoretical numbers of the slurry circulation pumps in the operating state, and the corresponding historical forced oxidation rates respectively corresponding to each second theoretical number; use the actual number of the slurry circulation pumps in the operating state to search in the first historical data set to obtain the current natural oxidation rate; use the actual number of the slurry circulation pumps in the operating state to search in the second historical data set to obtain the current forced oxidation rate.

[0017] Thus, when the calcium sulfite meter is abnormal, the accurate current natural oxidation rate and the current forced oxidation rate can be obtained according to the first historical data set, the second historical data set, and the actual number of the slurry circulation pumps in the operating state, and further the accurate oxidation air demand can be obtained.

[0018] In a second aspect, the present invention further provides a device for determining the oxidation air volume of the desulfurization slurry. The device includes an acquisition module, an oxidation rate determination module, and an air volume demand determination module; the acquisition module is used to acquire the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pool; the oxidation rate determination module is used to calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; the air volume demand determination module is used to calculate the oxidation air demand according to the current natural oxidation rate and the current forced oxidation rate.

[0019] In a third aspect, the present invention further provides a computer device, including a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to execute the method for determining the oxidation air volume of the desulfurization slurry in the first aspect or any corresponding embodiment thereof.

[0020] In a fourth aspect, the present invention further provides a computer-readable storage medium, on which computer instructions are stored. The computer instructions are used to cause a computer to execute the method for determining the oxidation air volume of the desulfurization slurry in the first aspect or any corresponding embodiment thereof.

[0021] Fifth aspect, the present invention further provides a computer program product, including computer instructions for causing a computer to execute the method for determining the oxidation air volume of desulfurized slurry in the above first aspect or any corresponding embodiment thereof. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a flowchart of the method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention;

[0024] Figure 2 is a comparison schematic diagram of the natural oxidation zone and the forced oxidation zone in the related art and this embodiment;

[0025] Figure 3 is a flowchart of another method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention;

[0026] Figure 4 is a flowchart of yet another method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention;

[0027] Figure 5 is a flowchart of yet another method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention;

[0028] Figure 6 is a schematic flowchart of the method for determining the oxidation air volume of sulfur slurry according to an embodiment of the present invention;

[0029] Figure 7 is a structural block diagram of the device for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of the hardware structure of the computer device according to an embodiment of the present invention. Detailed Embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] According to an embodiment of the present invention, an embodiment of a method for determining the oxidation air volume of desulfurized slurry is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0033] In this embodiment, a method for determining the oxidation air volume of desulfurized slurry is provided, which can be used in computer equipment. Figure 1 It is a flowchart of the method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention, as Figure 1 shown, and this process includes the following steps:

[0034] Step S101: Obtain the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; where the first position is the inlet of the slurry circulation pump and the second position is the liquid level of the slurry pool.

[0035] Specifically, calcium sulfite meters can be set at the first position and the second position, and the concentrations of calcium sulfite in the slurry at the first position and the second position are measured through the calcium sulfite meters. The concentrations of calcium sulfate in the slurry at the first position and the second position can be obtained through manual measurement.

[0036] Figure 2 It is a comparison schematic diagram of the natural oxidation zone and the forced oxidation zone in the related art and this embodiment. As Figure 2 shown, the definition of the natural oxidation rate (also called the original natural oxidation rate) in the related art is: when the oxidation fan is in the shutdown state, when the slurry in the absorption tower is sprayed out from the spray layer nozzles and moves to the inlet of the slurry circulation pump, the ratio of CaSO3·0.5H2O in the slurry being oxidized to CaSO4·2H2O, expressed as This part of the natural oxidation rate consists of two parts. One part is the slurry oxidation rate between the outlet of the spray layer nozzles and the liquid level of the slurry pool, expressed as ; the other part is the slurry oxidation rate from the liquid level of the slurry pool to the inlet of the slurry circulation pump, expressed as Then The corresponding area is called the natural oxidation zone.

[0037] As Figure 2 shown, the definition of the forced oxidation rate (also called the original forced oxidation rate) in the related art is: when the oxidation fan is in the on state, when the slurry in the absorption tower moves from the liquid level of the slurry pool to the outlet of the oxidation air duct, the ratio of CaSO3·0.5H2O in the slurry being oxidized by the oxidation air provided by the oxidation fan to CaSO4·2H2O, expressed as η 原It is denoted as η 原 The corresponding area is called the forced oxidation area.

[0038] As Figure 2 shown, the original forced oxidation area is a sub-area of the original natural oxidation area. When the oxidation fan is in operation, it is impossible to separately measure the natural oxidation rate and the forced oxidation rate of the slurry; and it is impossible to test the natural oxidation rate when the oxidation fan is out of service. Therefore, it is necessary to redefine the natural oxidation rate and the forced oxidation rate.

[0039] Specifically, in this embodiment, the natural oxidation rate is redefined as: the ratio of CaSO3·0.5H2O in the slurry being oxidized to CaSO4·2H2O during the process of the slurry falling from the spray layer nozzles to the liquid level of the slurry pool in the absorption tower, denoted as It can be seen from the above that As Figure 2 shown, the corresponding area is the newly defined natural oxidation area in this embodiment.

[0040] In this embodiment, the forced oxidation rate is redefined as: when the oxidation fan is in operation, the ratio of CaSO3·0.5H2O in the slurry being oxidized to CaSO4·2H2O by the dissolved oxygen in the slurry when the slurry moves from the liquid level of the slurry pool in the absorption tower to the inlet of the slurry circulation pump. It is denoted as η 新 It can be seen from the above that As Figure 2 shown, η 新 the corresponding area is the newly defined forced oxidation area in this embodiment.

[0041] It can be seen that the dissolved oxygen in the newly defined forced oxidation rate definition in this embodiment includes two parts. One part is the dissolved oxygen provided by the oxidation air of the oxidation fan dissolved in the slurry, and the other part is the unreacted part dissolved in the slurry during the process of the slurry moving from the spray layer to the liquid level of the slurry pool and contacting with the flue gas.

[0042] Step S102: Calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration and the fourth concentration.

[0043] Step S103: Calculate the required amount of oxidation air according to the current natural oxidation rate and the current forced oxidation rate.

[0044] The method for determining the oxidation air volume of desulfurized slurry provided in this embodiment solves the problem that the natural oxidation zone and the forced oxidation zone overlap and the natural oxidation rate and the forced oxidation rate cannot be measured online separately by redefining the natural oxidation zone and the forced oxidation zone. Further, by obtaining the first concentration of calcium sulfate in the slurry at the inlet of the slurry circulation pump, the second concentration of calcium sulfate in the slurry at the liquid level of the slurry pool, the third concentration of calcium sulfite in the slurry at the inlet of the slurry circulation pump, and the fourth concentration of calcium sulfite in the slurry at the liquid level of the slurry pool, the automatic assignment of the natural oxidation rate and the forced oxidation rate in different zones is realized, and the oxidation air demand can be calculated according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air volume of the desulfurized slurry can be adjusted in real time according to the detected data, solving the problem of poor accuracy in controlling the oxidation air volume of the oxidation fan.

[0045] In this embodiment, a method for determining the oxidation air volume of desulfurized slurry is provided, which can be used in computer equipment. Figure 3 It is a flowchart of another method for determining the oxidation air volume of desulfurized slurry according to an embodiment of the present invention, as Figure 3 shown, and the process includes the following steps:

[0046] Step S301: Obtain the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; where the first position is the inlet of the slurry circulation pump and the second position is the liquid level of the slurry pool.

[0047] In an optional implementation manner, when the number of calcium sulfite meters at the first position is multiple, the third concentration is the average value of the measured values of multiple calcium sulfite meters. This can make the third concentration more accurate, and thus make the finally obtained oxidation air demand more accurate.

[0048] In an optional implementation manner, when the number of calcium sulfite meters at the second position is multiple, the fourth concentration is the average value of the measured values of multiple calcium sulfite meters. This can make the fourth concentration more accurate, and thus make the finally obtained oxidation air demand more accurate.

[0049] Step S302: Calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration.

[0050] In an optional implementation manner, calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration includes the following steps S3021 to S3022.

[0051] Step S3021: Calculate the current natural oxidation rate according to the first concentration, the second concentration, and the fourth concentration using a preset first formula; the first formula is: where η 自然 represents the current natural oxidation rate, y1 represents the first concentration, y2 represents the second concentration, and x2 represents the fourth concentration;

[0052] Step S3022: Calculate the current forced oxidation rate according to the third concentration and the fourth concentration using a preset second formula; the second formula is: where η 强制 represents the current forced oxidation rate, x1 represents the third concentration, and x2 represents the fourth concentration.

[0053] This is because the slurry circulation pump transports the desulfurization slurry in the slurry pool to the spray layer. The slurry is atomized into small droplets through the nozzles of the spray layer, and then contacts the flue gas in a countercurrent manner to complete the SO2 absorption and then returns to the slurry pool. Part of the CaSO3·0.5H2O generated during the SO2 absorption process is oxidized to CaSO4·2H2O by the slurry in the original flue gas and O2 in the original flue gas. The unreacted CaSO3·0.5H2O enters the slurry pool and is forced to be oxidized to CaSO4·2H2O by the oxidation air blown in by the oxidation fan. The oxidation reaction processes of the two processes are shown in reactions (1) to (4).

[0054] SO2 + H2O → H2SO3 Reaction 1

[0055]

[0056] Assume that the calcium sulfite concentrations in the slurry at the inlet of the slurry circulation pump of the absorption tower and at the liquid level of the slurry pool are respectively The calcium sulfate concentrations in the slurry at the inlet of the slurry circulation pump of the absorption tower and at the liquid level of the slurry pool are respectively Let

[0057] Among them, before the slurry sprayed out from the spray layer descends to the liquid level of the slurry pool in the absorption tower, as in Reactions 1 and 2, part of the CaSO3·0.5H2O formed by the desulfurization slurry absorbing SO2 in the flue gas is oxidized to CaSO4·2H2O in Reaction 3. Let this part of CaSO3·0.5H2O be x3, then x3 = 0.75*(y2 - y1). Let the total concentration of CaSO3·0.5H2O formed by the desulfurization slurry absorbing SO2 in the flue gas before the slurry sprayed out from the spray layer descends to the liquid level of the absorption tower slurry pool be M, then M = x2 + x3. Let the natural oxidation rate of the slurry be η 自然 , then

[0058]

[0059] Among them, the coefficient 0.75 is obtained by the following method: the molar masses of CaSO3·0.5H2O and CaSO4·2H2O are 129 g / mol and 172 g / mol respectively. As shown in Reaction 4, when 1 mol of CaSO3·0.5H2O is oxidized to 1 mol of CaSO4·2H2O, then the mass of CaSO4·2H2O generated from the oxidized CaSO3·0.5H2O (mass is x3) in the slurry falling from the outlet of the spray layer to the liquid level of the slurry pool is x3×172 / 129. Further, then x3 = 0.75*(y2 - y1).

[0060] The forced oxidation rate of CaSO3·0.5H2O in the slurry pool is:

[0061]

[0062] It should be noted that in the embodiments of the present invention, the current natural oxidation rate changes with the number of slurry circulation pumps started. When the number of slurry circulation pumps started increases from one to multiple, the current natural oxidation rate gradually increases. Assigning values to the natural oxidation rate online dynamically can address the problem of fluctuations in the natural oxidation rate caused by changes in the number of slurry circulation pumps started, which in turn leads to inaccurate air volume control. The re - division of the natural oxidation area and the forced oxidation area in the embodiments of the present invention also solves the problem of area intersection and realizes accurate air volume control when the number of operating slurry circulation pumps changes.

[0063] Step S303: Calculate the oxidation air demand based on the current natural oxidation rate and the current forced oxidation rate.

[0064] Specifically, the oxidation air demand calculated from the current natural oxidation rate and the current forced oxidation rate can adopt the following third formula:

[0065]

[0066] Among them, Q oxidation is the oxidation air demand of the desulfurization facility, m 3 / h (standard condition), is the flue gas volume of the desulfurization facility operation, m 3 / h (standard dry, 6% O2), is the SO2 concentration of the flue gas at the inlet of the desulfurization (standard dry, 6% O2), mg / m 3 ; is the desulfurization efficiency, %, is the natural oxidation rate of the slurry, β is the oxygen / sulfur molar ratio, with a value of 0.5, M air is the average molar mass of the oxidation air, g / mol, η 强制is the forced oxidation rate of the slurry, %, ζ is the oxygen content in dry air, with a value of 20.9, %, ρ air is the density of the oxidation air, kg / m 3 .

[0067] It should be noted that there is a problem with the accuracy of the indicated value of the flue gas volume meter during desulfurization operation. The unit load and the designed flue gas volume are used for substitution. Among them, the designed flue gas volume is experimentally calibrated to obtain the fourth formula.

[0068]

[0069] Among them, M 运 is the operating power, M 额 is the rated power, q 标 is the designed flue gas volume under the rated condition of experimental calibration.

[0070] The method for determining the oxidation air volume of the desulfurization slurry provided in this embodiment solves the problem that the natural oxidation zone and the forced oxidation zone are crossed and the oxidation rate cannot be measured online separately by re-dividing the natural oxidation zone and the forced oxidation zone. Further, by obtaining the first concentration of calcium sulfate in the slurry at the inlet of the slurry circulation pump, the second concentration of calcium sulfate in the slurry at the liquid level of the slurry pool, the third concentration of calcium sulfite in the slurry at the inlet of the slurry circulation pump, and the fourth concentration of calcium sulfite in the slurry at the liquid level of the slurry pool, the automatic assignment of the natural oxidation rate and the forced oxidation rate of the partition is realized, and the oxidation air demand can be calculated according to the natural oxidation rate and the forced oxidation rate, and the oxidation air demand can be calculated according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air volume of the desulfurization slurry can be adjusted in real time according to the detected data, and the problem of poor control accuracy of the oxidation air volume of the oxidation fan is solved.

[0071] In this embodiment, a method for determining the oxidation air volume of the desulfurization slurry is provided, which can be used in computer equipment. Figure 4 is the flowchart of another method for determining the oxidation air volume of the desulfurization slurry according to the embodiment of the present invention, as Figure 4 shown, the process includes the following steps:

[0072] Step S401: Obtain the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; where the first position is the inlet of the slurry circulation pump and the second position is the liquid level of the slurry pool.

[0073] Step S402: Calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration and the fourth concentration.

[0074] Step S403: Calculate the required amount of oxidation air based on the current natural oxidation rate and the current forced oxidation rate.

[0075] Step S404: Determine whether the third concentration is greater than a preset first threshold. When the third concentration is greater than the first threshold, proceed to Step S405.

[0076] Step S405: Obtain the current liquid level of the absorption tower.

[0077] Step S406: Obtain the oxidation air adjustment amount based on the third concentration and the current liquid level, and adjust the required amount of oxidation air according to the oxidation air adjustment amount.

[0078] This is because the quality standard of flue gas desulfurization gypsum in coal-fired power plants is generally controlled according to the indicators of secondary gypsum specified in the national standard for flue gas desulfurization gypsum. The control value of the concentration of hemihydrate calcium sulfate in gypsum is ≤0.5%, the solid content of the desulfurization slurry is about 20%, and the dehydration density of the gypsum is 1130 kg / m 3 . Therefore, the concentration value of SO3 2- in the desulfurization slurry at the oxidation end point can be calculated according to the fifth formula.

[0079]

[0080] In the formula, is the concentration of CaSO3·0.5H2O in the solid content of the slurry, mg / l, is the slurry density, kg / m 3 , with a value of 1130; is the volume of the absorption tower slurry, m 3 , with a value of 1; is the solid content of the slurry, %, with a value of 20.

[0081] It can be calculated from the fifth formula that under the rated design conditions, the theoretical maximum value of the control index for the oxidation end point of SO3 2- in the wet desulfurization slurry is 1130 mg / l. For example, for the safety of the operation of the desulfurization facility, the oxidation end point concentration value of SO3 2- in the slurry can be set to 350 mg / l.

[0082] Based on this,

[0083] Among them, V 浆液 = 0.25 × 3.14 × D 2 × H 液 Seventh formula

[0084] Substituting the seventh formula into the sixth formula, we can get:

[0085] △Q oxidation = 1.637 × (x - 350) × H 液 Eighth formula

[0086] According to the eighth formula, the corrected air volume of calcium sulfite is proportional to the calcium sulfite concentration and the liquid level of the absorption tower. The computer device automatically calculates the corrected air volume of the oxidation air △Q through the eighth formula oxidation , and obtains Q oxidation , Q oxidation It is transmitted to the local PLC system of the oxidation fan through the oxidation air control server to complete the precise regulation of the oxidation air volume.

[0087] According to the fourth formula and the eighth formula, the oxidation air volume of the desulfurization slurry can be obtained through the following ninth formula:

[0088]

[0089] In the embodiment of the present invention, by adjusting the demand for oxidation air, the control accuracy of the oxidation air volume is further improved, and the problem of low control accuracy caused by insufficient representativeness of online data such as flue gas volume and SO2 concentration in the original flue gas, and data transmission delay is solved. Using the online calcium sulfite concentration to further regulate the air volume is the third line of defense for air volume adjustment.

[0090] The first threshold in the embodiment of the present invention is set to 350 mg / l. When the third concentration > the preset first threshold, it is considered that the slurry oxidation is insufficient, and the supply of oxidation air needs to be increased to improve the oxidation effect, with the aim of more precisely adjusting the oxidation air volume.

[0091] The method for determining the oxidation air volume of the desulfurization slurry provided in this embodiment can not only calculate the demand for oxidation air according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air volume of the desulfurization slurry can be adjusted in real time according to the detected data, solving the problem of poor control accuracy of the oxidation air volume of the oxidation fan; but also correct the demand for oxidation air, so that the calculated demand for oxidation air is more accurate.

[0092] In this embodiment, a method for determining the oxidation air volume of the desulfurization slurry is provided, which can be used in a computer device. Figure 5 It is a flowchart of another method for determining the oxidation air volume of the desulfurization slurry according to the embodiment of the present invention, as Figure 5 shown, and this process includes the following steps:

[0093] Step S501: Determine whether the calcium sulfite meter is operating normally. When the calcium sulfite meter is operating normally, go to step S502; when the calcium sulfite meter is operating abnormally, go to step S505.

[0094] In an alternative embodiment, determining whether the calcium sulfite meter is operating normally includes: obtaining the operating signal of the calcium sulfite meter; determining whether the calcium sulfite meter is operating normally according to the operating signal. Among them, when the operating conditions of the unit change, the indication value of the calcium sulfite meter changes with the change of the conditions.

[0095] In another alternative embodiment, determining whether the calcium sulfite meter is operating normally includes: obtaining the detection data of the dissolved oxygen meter; determining whether the calcium sulfite meter is operating normally according to the detection data. Specifically, when the detection data is greater than a preset second threshold, it is determined that the calcium sulfite meter is operating normally. By way of example, when the detection data of the dissolved oxygen meter > 1.8 mmol, it is determined that the calcium sulfite meter is operating normally; when the detection data of the dissolved oxygen meter ≤ 1.8 mmol, it is determined that the calcium sulfite meter is operating abnormally.

[0096] In yet another alternative embodiment, determining whether the calcium sulfite meter is operating normally includes: obtaining the operating signal of the calcium sulfite meter and the detection data of the dissolved oxygen meter; determining whether the calcium sulfite meter is operating normally according to the operating signal of the calcium sulfate meter and the detection data of the dissolved oxygen meter.

[0097] Step S502: Obtain the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry tank.

[0098] Step S503: Calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration.

[0099] Step S504: Calculate the required amount of oxidation air according to the current natural oxidation rate and the current forced oxidation rate.

[0100] Step S505: Obtain a preset first historical data set, a second historical data set, and the actual number of slurry circulation pumps in the operating state; wherein the first historical data set includes various first theoretical numbers of slurry circulation pumps in the operating state and the corresponding historical natural oxidation rates respectively; the second historical data set includes various second theoretical numbers of slurry circulation pumps in the operating state and the corresponding historical forced oxidation rates respectively.

[0101] Specifically, when the current signal of the slurry circulation pump > 20 A, it is considered that the slurry circulation pump is in the operating state. By way of example, different combinations of slurry circulation pumps can be counted respectively. For example, when 1 slurry circulation pump is operating, the count is 1, and when 2 or 3 slurry circulation pumps are operating, the counts are 2 and 3 respectively. That is, the counts 1, 2, and 3 are used to represent the number of operating slurry circulation pumps respectively.

[0102] In a computer device, three data stacks for the natural oxidation rate of oxidation air are established, named data1, data2, and data3 respectively. The natural oxidation rate data when the counts are 1, 2, and 3 respectively are stored in data1, data2, and data3. With a storage period of 30 days, three data sets are formed, denoted as data1{30d}, data2{30d}, and data3{30d} respectively. These three data sets constitute the first historical data combination. The average values of the stored data in the data sets are obtained, namely AVERAGE(data1{30d}), AVERAGE(data2{30d}), and AVERAGE(data3{30d}), and they are used as the natural oxidation rates when the numbers of slurry circulation pumps in the running state are 1, 2, and 3 respectively.

[0103] Step S506: Use the actual number of slurry circulation pumps in the running state to search in the first historical data set, and obtain the current natural oxidation rate according to the search result; use the actual number of slurry circulation pumps in the running state to search in the second historical data set, and obtain the current forced oxidation rate according to the search result.

[0104] For example, when the actual number of slurry circulation pumps in the running state is 1, search in data1{30d} to obtain 30 natural oxidation rates, and calculate the average value of the 30 natural oxidation rates obtained by the search to obtain the current natural oxidation rate. It should be noted that the above only takes calculating the average value of the search result as an illustration of obtaining the current natural oxidation rate according to the search result. Of course, other processing can also be performed on the search result to obtain the current natural oxidation rate.

[0105] Of course, it is also possible to save the average values AVERAGE(data1{30d}), AVERAGE(data2{30d}), and AVERAGE(data3{30d}) of 30 natural oxidation rates in data1{30d}, data2{30d}, and data3{30d} respectively. When the actual number of slurry circulation pumps in the running state is 1, search in data1{30d} to obtain AVERAGE(data1{30d}), and directly use the AVERAGE(data1{30d}) obtained by the search as the current natural oxidation rate.

[0106] Step S507: Calculate the required amount of oxidation air according to the current natural oxidation rate and the current forced oxidation rate.

[0107] Figure 6 It is a schematic diagram of the desulfurization slurry oxidation air volume determination system according to an embodiment of the present invention, as Figure 6As shown in the figure, at the liquid level of the slurry pond (which can also be called the slurry pond liquid level), the slurry at the liquid level of the slurry pond is sampled through the slurry sampling pipes at the outlets of Pump 2A, Pump 2B, and Pump 2C, and the calcium sulfite concentration of the sample is detected by the on-line calcium sulfite tester 1. Similarly, the calcium sulfite concentration at the liquid receiving tray is detected by the on-line calcium sulfite tester 2. It should be noted that an on-line calcium sulfite tester is also provided at the inlet of the slurry circulation pump to detect the calcium sulfite concentration at the inlet of the slurry circulation pump. To avoid wire confusion, in Figure 6 it is not marked.

[0108] In addition, an on-line dissolved oxygen meter is also provided in the desulfurized slurry oxidation air volume determination system to determine whether the on-line calcium sulfite tester is normal through the on-line dissolved oxygen meter. Specifically, when the detection data of the dissolved oxygen meter > 1.8 mmol, it is determined that the calcium sulfite meter is operating normally. At this time, the current natural oxidation rate and the current forced oxidation rate of the slurry can be calculated according to the first concentration, the second concentration, the third concentration, and the fourth concentration, and further the oxidation air demand can be calculated according to the current natural oxidation rate and the current forced oxidation rate (that is, the oxidation air volume is obtained according to the oxidation air control model). When the detection data of the dissolved oxygen meter ≤ 1.8 mmol, it is determined that the calcium sulfite meter is operating abnormally. At this time, the actual number of operating slurry circulation pumps can be used to search in the first historical data set, and the current natural oxidation rate can be obtained according to the search result; the actual number of operating slurry circulation pumps can be used to search in the second historical data set, and the current forced oxidation rate can be obtained according to the search result, and further the oxidation air demand can be calculated according to the current natural oxidation rate and the current forced oxidation rate (that is, the oxidation air volume is obtained according to the oxidation air prediction model). The oxidation air control server outputs the obtained oxidation air volume to the variable frequency desulfurized oxidation fan.

[0109] As Figure 6 shown in the figure, at the inlet of the slurry circulation pump of the desulfurized slurry oxidation air volume determination system, the operating state of the slurry circulation pump is obtained through the current signals of Pump A Slurry Circulation, Pump B Slurry Circulation, and Pump C Slurry Circulation. The oxidation air control server can statistically analyze the historical data according to the operating state of the slurry circulation pump to obtain the first historical data set and the second historical data set.

[0110] The desulfurized slurry oxidation air volume determination method provided in this embodiment can not only calculate the oxidation air demand according to the natural oxidation rate and the forced oxidation rate, so that the oxidation air volume of the desulfurized slurry can be adjusted in real time according to the detected data, solving the problem of poor control accuracy of the oxidation air volume of the oxidation fan; but also when the calcium sulfite meter is abnormal, the accurate current natural oxidation rate and the current forced oxidation rate can be obtained according to the first historical data set, the second historical data set, and the actual number of operating slurry circulation pumps, and further the accurate oxidation air demand can be obtained.

[0111] In this embodiment, a device for determining the oxidation air volume of desulfurized slurry is further provided. This device is used to implement the above-mentioned embodiments and preferred implementation manners, and those that have been described will not be elaborated again. As used below, the term "module" can be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0112] This embodiment provides a device for determining the oxidation air volume of desulfurized slurry, as Figure 7 shown, including:

[0113] An acquisition module 701, configured to acquire a first concentration of calcium sulfate in the slurry at a first position, a second concentration of calcium sulfate in the slurry at a second position, a third concentration of calcium sulfite in the slurry at the first position, and a fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pool;

[0114] An oxidation rate determination module 702, configured to calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration;

[0115] An air volume demand determination module 703, configured to calculate the oxidation air demand according to the current natural oxidation rate and the current forced oxidation rate.

[0116] In some optional implementation manners, the oxidation rate determination module 702 is specifically configured to: calculate the current natural oxidation rate according to the first concentration, the second concentration, and the fourth concentration by using a preset first formula; the first formula is: where η 自然 represents the current natural oxidation rate, y1 represents the first concentration, y2 represents the second concentration, and x2 represents the fourth concentration; calculate the current forced oxidation rate according to the third concentration and the fourth concentration by using a preset second formula;

[0117] The second formula is: where η 强制 represents the current forced oxidation rate, x1 represents the third concentration, and x2 represents the fourth concentration.

[0118] In some optional implementation manners, the device for determining the oxidation air volume of desulfurized slurry further includes a correction module. After calculating the oxidation air demand according to the current natural oxidation rate and the current forced oxidation rate, the correction module is configured to: determine whether the third concentration is greater than a preset first threshold; when the third concentration is greater than the first threshold, acquire the current liquid level of the absorption tower; obtain an oxidation air adjustment amount according to the third concentration and the current liquid level, and adjust the oxidation air demand according to the oxidation air adjustment amount.

[0119] In some alternative embodiments, when the number of calcium sulfite meters at the first position is multiple, the third concentration is the average value of the measurement values of multiple calcium sulfite meters; when the number of calcium sulfite meters at the second position is multiple, the fourth concentration is the average value of the measurement values of multiple calcium sulfite meters.

[0120] In some alternative embodiments, the desulfurized slurry oxidation air volume determination device further includes an exception handling module. When obtaining the first concentration of calcium sulfate in the slurry at the first position, the second concentration of calcium sulfate in the slurry at the second position, the third concentration of calcium sulfite in the slurry at the first position, and the fourth concentration of calcium sulfite in the slurry at the second position; where the first position is the inlet of the slurry circulation pump and the second position is before the liquid level of the slurry pool, the exception handling module is used to: obtain the operation signal of the calcium sulfite meter; determine whether the calcium sulfite meter is operating normally according to the operation signal; when the calcium sulfite meter is operating normally, execute calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; obtain the detection data of the dissolved oxygen meter; determine whether the calcium sulfite meter is operating normally according to the detection data; when the calcium sulfite meter is operating normally, execute calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration.

[0121] In some alternative embodiments, when the calcium sulfite meter operates abnormally, the oxidation rate determination module 702 is used to: obtain a preset first historical data set, a second historical data set, and the actual number of slurry circulation pumps in the operating state; where the first historical data set includes multiple first theoretical numbers of slurry circulation pumps in the operating state and the corresponding historical natural oxidation rates respectively; the second historical data set includes multiple second theoretical numbers of slurry circulation pumps in the operating state and the corresponding historical forced oxidation rates respectively; use the actual number of slurry circulation pumps in the operating state to search in the first historical data set to obtain the current natural oxidation rate; use the actual number of slurry circulation pumps in the operating state to search in the second historical data set to obtain the current forced oxidation rate.

[0122] The desulfurized slurry oxidation air volume determination device in this embodiment is presented in the form of functional units. Here, the unit refers to an ASIC circuit, a processor and a memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0123] The further function descriptions of the above-mentioned various modules and units are the same as those in the corresponding above embodiments, and will not be repeated here.

[0124] The embodiment of the present invention also provides a computer device having the above Figure 8The device for determining the oxidation air volume of desulfurized slurry shown in the figure.

[0125] Please refer to Figure 8 , Figure 8 which is a schematic structural diagram of a computer device provided by an alternative embodiment of the present invention. As Figure 8 shown, the computer device includes: one or more processors 10, a memory 20, and an interface for connecting each component, including a high-speed interface and a low-speed interface. Each component communicates with each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed within the computer device, including instructions stored in the memory or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some alternative embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a set of blade servers, or a multi-processor system). Figure 8 In

[0126]

[0127]

[0128]

[0129] The processor 10 can be a central processing unit, a network processor, or a combination thereof. Among them, the processor 10 can further include a hardware chip. The above hardware chip can be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The above programmable logic device can be a complex programmable logic device, a field programmable gate array, a general array logic, or any combination thereof.

[0129] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid state drive; the memory 20 may further include a combination of the above types of memory.

[0130] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected through a bus or other means. Figure 8 Taking the connection through the bus as an example.

[0131] The input device 30 can receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as touch screen, keypad, mouse, trackpad, touchpad, pointing stick, one or more mouse buttons, trackball, joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., LED) and a haptic feedback device (e.g., vibration motor), etc. The above display device includes but is not limited to liquid crystal display, light emitting diode, monitor and plasma display. In some alternative embodiments, the display device may be a touch screen.

[0132] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or be implemented as computer code that can be recorded on a storage medium, or be implemented by downloading through a network and originally stored in a remote storage medium or a non-transitory machine-readable storage medium and will be stored in a local storage medium, so that the method described herein can be stored on such a software process on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk or a solid state drive, etc.; further, the storage medium may further include a combination of the above types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor or the hardware, the method shown in the above embodiment is implemented.

[0133] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for determining the oxidation air volume of desulfurization slurry, characterized in that Including: Obtaining a first concentration of calcium sulfate in the slurry at a first position, a second concentration of calcium sulfate in the slurry at a second position, a third concentration of calcium sulfite in the slurry at the first position, and a fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pond; Calculating a current natural oxidation rate and a current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; Calculating an oxidation air demand according to the current natural oxidation rate and the current forced oxidation rate.

2. The method according to claim 1, wherein The calculating the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration includes: Calculating the current natural oxidation rate according to the first concentration, the second concentration, and the fourth concentration by using a preset first formula; The first formula is as follows: where η 自然 represents the current natural oxidation rate, y1 represents the first concentration, y2 represents the second concentration, and x2 represents the fourth concentration; Calculating the current forced oxidation rate according to the third concentration and the fourth concentration by using a preset second formula; The second formula is as follows: where η 强制 represents the current forced oxidation rate, x1 represents the third concentration, and x2 represents the fourth concentration.

3. The method according to claim 1, wherein After calculating the oxidation air demand according to the current natural oxidation rate and the current forced oxidation rate, it further includes: Judging whether the third concentration is greater than a preset first threshold; When the third concentration is greater than the first threshold, obtaining the current liquid level of the absorption tower; Obtaining an oxidation air adjustment amount according to the third concentration and the current liquid level, and adjusting the oxidation air demand according to the oxidation air adjustment amount.

4. The method according to any one of claims 1 to 3, characterized in that: When the number of calcium sulfite meters at the first position is multiple, the third concentration is the average value of the measurement values of the multiple calcium sulfite meters; When the number of calcium sulfite meters at the second position is multiple, the fourth concentration is the average value of the measurement values of the multiple calcium sulfite meters.

5. The method according to claim 1, characterized in that Before obtaining a first concentration of calcium sulfate in the slurry at a first position, a second concentration of calcium sulfate in the slurry at a second position, a third concentration of calcium sulfite in the slurry at the first position, and a fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pond, it further includes: Obtaining an operation signal of the calcium sulfite meter; Judging whether the calcium sulfite meter is operating normally according to the operation signal; When the calcium sulfite meter is operating normally, performing the calculation of the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration; and / or; Obtaining detection data of a dissolved oxygen meter; Judging whether the calcium sulfite meter is operating normally according to the detection data; When the calcium sulfite meter is operating normally, performing the calculation of the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration.

6. The method according to claim 5, characterized in that It further includes: When the calcium sulfite meter operates abnormally, obtain a preset first historical data set, a second historical data set, and the actual number of slurry circulation pumps in the operating state; wherein the first historical data set includes multiple first theoretical numbers of the slurry circulation pumps in the operating state and the historical natural oxidation rates respectively corresponding to each of the first theoretical numbers; the second historical data set includes multiple second theoretical numbers of the slurry circulation pumps in the operating state and the historical forced oxidation rates respectively corresponding to each of the second theoretical numbers. Use the actual number of the slurry circulation pumps in the operating state to search in the first historical data set, and obtain the current natural oxidation rate according to the search result. Use the actual number of the slurry circulation pumps in the operating state to search in the second historical data set, and obtain the current forced oxidation rate according to the search result.

7. An apparatus for determining the oxidation air volume of desulfurization slurry, characterized in that, The device includes: An acquisition module, configured to acquire a first concentration of calcium sulfate in the slurry at a first position, a second concentration of calcium sulfate in the slurry at a second position, a third concentration of calcium sulfite in the slurry at the first position, and a fourth concentration of calcium sulfite in the slurry at the second position; wherein the first position is the inlet of the slurry circulation pump, and the second position is the liquid level of the slurry pond. An oxidation rate determination module, configured to calculate the current natural oxidation rate and the current forced oxidation rate of the slurry according to the first concentration, the second concentration, the third concentration, and the fourth concentration. An air volume demand determination module, configured to calculate the required oxidation air volume according to the current natural oxidation rate and the current forced oxidation rate.

8. A computer device, characterized in that, Includes: A memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to execute the desulfurized slurry oxidation air volume determination method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, Computer instructions are stored on the computer-readable storage medium, and the computer instructions are used to cause a computer to execute the desulfurized slurry oxidation air volume determination method according to any one of claims 1 to 6.

10. A computer program product, characterized in that, Includes computer instructions, and the computer instructions are used to cause a computer to execute the desulfurized slurry oxidation air volume determination method according to any one of claims 1 to 6.

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