A method and system for determining the deployment strategy of seawater desulfurization spray layer

Abstract

This specification provides a method and system for determining the activation / deactivation strategy of the seawater desulfurization spray layer. The method includes: calculating, under full-load operation of the unit, the change in SO2 emission concentration at different spray layer states under different seawater ion concentrations during coal combustion, and the baseline value of SO2 emission concentration when the spray layer is fully open corresponding to that concentration; obtaining the change, calculating the influence deviation of different seawater ion concentrations on the change under the same SO2 generation during coal combustion, determining the ion concentration value with the smallest influence deviation, and establishing a calculation model for the expected change in flue gas SO2 concentration emission at this ion concentration value; determining the activation / deactivation strategy of the seawater desulfurization spray layer based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emission after changing the number of activated / deactivated spray layers, and the online real-time flue gas SO2 concentration monitoring value, thereby achieving SO2 emission compliance and economical energy-saving operation of the power plant.

Description

Technical Field

[0001] This document relates to the field of seawater desulfurization technology, and in particular to a method and system for determining the activation strategy of seawater desulfurization spray layer. Background Technology

[0002] The alkalinity of the seawater near the intake of the desulfurization system of a coastal coal-fired power plant is unstable and varies widely. The ion concentration varies between 48 and 120 mg / L; currently, the method used is to predict the seawater concentration at the intake. When using methods to analyze ion concentration variations to guide the operation of seawater desulfurization systems in power plants, it is necessary to wait several hours after seawater sampling and measurement to obtain the measured values. Furthermore, it is necessary to use oceanographic data such as tidal changes to extrapolate and calculate the real-time data corresponding to the sampling time point. The issue of ion concentration presents challenges, including a cumbersome seawater prediction process, the inability to measure seawater quality in real time, and a lack of simplified guidance for power plant operators. These issues will significantly impact the development and implementation of operational strategies for power plant seawater desulfurization systems.

[0003] Therefore, it can be seen that using the SO2 generated during coal combustion as a substitute... Ion concentration guides the determination of the activation / deactivation strategy for the seawater desulfurization spray layer, eliminating the need to consider seawater itself. The influence of ion concentration is of great significance for simplifying the actual operation of power plant operators and achieving SO2 emission standards and economical and energy-saving operation of power plants. Summary of the Invention

[0004] This specification provides one or more embodiments of a method for determining the deployment strategy of a seawater desulfurization spray layer, including:

[0005] S1. Calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 concentration emissions under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 concentration emissions when the spray layer is fully open at the corresponding concentration.

[0006] S2. Obtain the change amount, and calculate the difference in SO2 generation under the same conditions during coal combustion for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0007] S3. Determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0008] This specification provides one or more embodiments of a system for determining the activation strategy of a seawater desulfurization spray layer, including:

[0009] The change calculation module is used to calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 concentration emissions under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 concentration emissions when the spray layer is fully open at the corresponding concentration.

[0010] Model building module: used to obtain the changes and calculate the SO2 generation under the same conditions during coal combustion, for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0011] Strategy Determination Module: This module is used to determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0012] This specification provides one or more embodiments of an electronic device, including:

[0013] Processor; and,

[0014] A memory is configured to store computer-executable instructions, which, when executed, cause the processor to perform the steps of the method described above for determining the activation strategy of a seawater desulfurization spray layer.

[0015] This specification provides one or more embodiments of a storage medium for storing computer-executable instructions that, when executed, implement the steps of the method described above for determining the deployment strategy of a seawater desulfurization spray layer.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides a seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layers, and the online real-time flue gas SO2 concentration monitoring value, to achieve SO2 emission compliance and economical and energy-saving operation of power plants.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a method for determining the deployment strategy of a seawater desulfurization spray layer, provided for one or more embodiments of this specification;

[0021] Figure 2 Different seawater conditions at full load of the unit The fitting curve of the change in flue gas SO2 concentration emission ΔP and the SO2 generation during coal combustion under the operation of the spray layer with one small layer closed at the ion concentration;

[0022] Figure 3 Different seawater conditions at full load of the unit The fitting curve of SO2 concentration change in flue gas emission ΔP versus SO2 generation during coal combustion under the operation of the spray layer with one large layer closed at the ion concentration;

[0023] Figure 4 Different seawater conditions at full load of the unit The fitting curve of the change in flue gas SO2 concentration emission ΔP and the SO2 generation during coal combustion under the operation of the spray layer with one small layer and one large layer closed at the ion concentration;

[0024] Figure 5 Different seawater conditions at full load of the unit The effect of ion concentration on the change in SO2 concentration emission in flue gas ΔP (when one small layer of the spray layer is closed) is shown in the trend curve of SO2 generation during coal combustion.

[0025] Figure 6 Different seawater conditions at full load of the unit The deviation of the influence of ion concentration on the change in SO2 concentration emission in flue gas ΔP (one large layer of spray layer is closed) as a function of SO2 generation during coal combustion;

[0026] Figure 7 Different seawater conditions at full load of the unit The deviation of the influence of ion concentration on the change in SO2 concentration emission in flue gas ΔP (with one large layer and one small layer of the spray layer closed) as a function of SO2 generation during coal combustion;

[0027] Figure 8A schematic diagram of the composition of a system for determining the activation strategy of a seawater desulfurization spray layer, provided for one or more embodiments of this specification;

[0028] Figure 9 This is a schematic diagram of the structure of an electronic device provided for one or more embodiments of this specification. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0030] Method Implementation Examples

[0031] According to embodiments of the present invention, a method for determining the deployment strategy of a seawater desulfurization spray layer is provided. Figure 1 A flowchart illustrating a method for determining the deployment strategy of a seawater desulfurization spray layer, provided for one or more embodiments of this specification, is shown below. Figure 1 As shown, the method for determining the deployment strategy of the seawater desulfurization spray layer according to an embodiment of the present invention specifically includes:

[0032] S1. Calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 concentration emissions under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 concentration emissions when the spray layer is fully open at the corresponding concentration.

[0033] When the unit is at full load, the SO2 generation during coal combustion in different seawater samples was collected. The SO2 concentration emission rate of flue gas under different seawater concentrations when the spray layer is fully open is used as a reference. Baseline values ​​for SO2 emissions at ion concentrations;

[0034] Based on the aforementioned benchmark values, the SO2 generation during coal combustion in different seawater conditions was calculated. The change in flue gas SO2 concentration emission relative to the baseline value when one small layer, one large layer, or one large layer and one small layer of the spray layer are closed at the ion concentration.

[0035] S2. Obtain the change amount, and calculate the difference in SO2 generation under the same conditions during coal combustion for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0036] The specific calculation method for the influence of deviation is as follows:

[0037] Preset a certain Using the change in SO2 concentration in flue gas under different ion concentrations as a baseline, calculations were made for other seawater... The deviation between the change in flue gas SO2 concentration emission and the baseline value after changing the number of spray layers / discontinuities is determined by the influence of ion concentration.

[0038] S3. Determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0039] This embodiment takes the study of the desulfurization spray layer on / off strategy of a coastal coal-fired power plant under full unit load as an example. The alkalinity of the seawater near the intake of the power plant's seawater desulfurization system is unstable and varies widely. The ion concentration varies between 48 and 120 mg / L. Current predictions indicate that the seawater at the intake point... The probability of an ion concentration greater than 78 mg / L throughout the year is 93.5%. The specific implementation steps of this embodiment are as follows:

[0040] Step 1: Perform big data fitting processing and analyze different seawater... The trend of SO2 concentration emission change in flue gas after changing the number of spray layers / fault layers under different ion concentrations, as a function of SO2 generation during coal combustion; the specific implementation is as follows:

[0041] 1. Data Processing

[0042] 1.1 Setting the SO2 generation during coal combustion at different seawater levels under full unit load The SO2 concentration emission value P of flue gas under the fully open state of the spray layer at the ion concentration is the baseline value.

[0043] 1.2 Calculate the SO2 generation during coal combustion at different seawater temperatures under full unit load. The change in SO2 concentration in flue gas emission ΔP corresponding to the closure of one small layer, one large layer, or one large layer and one small layer of the spray layer at the ion concentration.

[0044] An example of the formula for calculating △P is shown below:

[0045] When the unit is at full load, seawater Under the condition of ion concentration of 90 mg / L, taking the flue gas SO2 concentration emission value P when the spray layer is fully open as the baseline value, the change in flue gas SO2 concentration emission ΔP corresponding to the SO2 generation during coal combustion after closing one small layer, one large layer, or one large layer and one small layer of the spray layer are calculated respectively, as shown in Formulas 1, 2, and 3:

[0046] △P(closing one small layer) = P(closing one small layer) - P(spray layer fully open) Formula 1;

[0047] △P(closing one large layer) = P(closing one large layer) - P(spray layer fully open) Formula 2;

[0048] △P(closing one large layer and one small layer) = P(closing one large layer and one small layer) - P(fully opening the spray layer) Formula 3;

[0049] Similarly, calculations can be performed at full load in other seawater conditions. The change in flue gas SO2 concentration emission ΔP corresponding to the change in the number of spray layers / discontinuities during coal combustion at the given ion concentration.

[0050] 2. Fitting and Analysis of Big Data

[0051] Different seawater at full load of the unit Big data fitting was performed on the SO2 generation during coal combustion and the corresponding changes in flue gas SO2 concentration emissions after changing the number of spray layers / faults at different ion concentrations. The fitting curves are shown below. Figures 2-4 As shown, the correlation coefficients of the two fitting methods are both close to 1 (0.99867-0.99955), the relative error ranges from 0.01% to 2.39%, and the average relative error ranges from 0.51% to 1%, indicating a good fitting effect.

[0052] Analysis of the fitted curves shows that: different seawater The changes in flue gas SO2 concentration emissions after changing the number of spray layers / fault layers under different ion concentrations show similar trends with the SO2 generation during coal combustion.

[0053] Step Two: Study and Analyze Seawater The impact of ion concentration on the change in flue gas SO2 concentration after changing the number of spray layers / faults was investigated, and a calculation model for the expected change in flue gas SO2 concentration after changing the number of spray layers / faults was established to eliminate the influence of seawater alkalinity.

[0054] 1. Analyze seawater The effect of ion concentration on the change in flue gas SO2 concentration emission after changing the number of spray layers;

[0055] Analysis of SO2 generation under the same coal combustion conditions, using different seawater... The effect of ion concentration on the change in SO2 concentration in flue gas after changing the number of spray layers / discontinuities.

[0056] Now with seawater Using ΔP at an ion concentration of 90 mg / L as a baseline, this example illustrates the calculation of SO2 generation under the same coal combustion conditions, considering different seawater concentrations. The effect of ion concentration (65, 78, 100, 105, 110, 115, 120 mg / L) on the deviation of ΔP, where:

[0057] Different seawater The effect of ion concentration on the change in SO2 concentration emission in flue gas after changing the number of spray layers / fault layers: Deviation = ΔP (different seawater) ion concentration) - ΔP( (ion concentration 90 mg / L)

[0058] Figures 5-7 For different seawater The influence of ion concentration on the change in flue gas SO2 concentration emission after changing the number of spray layers / fault layers varies with the trend of SO2 generation during coal combustion.

[0059] Depend on Figure 5-7 It can be seen that: The deviation of the effect of varying ion concentration between 78 and 115 mg / L on the change in flue gas SO2 concentration emission after changing the number of spray layers varies with the amount of SO2 generated during coal combustion, ranging from -5 to 5 mg / L. This deviation accounts for a relatively small proportion (1% to 1.3%) of the flue gas SO2 concentration emission value under full load of the unit. Therefore, if calculated according to... The fitted equation at an ion concentration of 90 mg / L calculates the expected change ΔP in flue gas SO2 concentration emissions after changing the number of spray layers / discontinuities, which can be considered to have eliminated the need for... The effect of varying ion concentrations between 78 and 115 mg / L on the change in SO2 emission concentration ΔP after altering the number of spray layers.

[0060] On the other hand, considering the current predictions of seawater at the power plant's intake... The probability of an ion concentration greater than 78 mg / L throughout the year is 93.5%, so seawater can be disregarded. The impact of an ion concentration of 65 mg / L (the worst seawater quality condition) on the change in SO2 concentration emission ΔP after altering the number of spray layers / faults was investigated. Furthermore, considering the unstable and wide-ranging alkalinity of the seawater used for desulfurization at this power plant, this factor can be disregarded. The impact of an ion concentration of 120 mg / L (the best seawater quality condition) on the change in SO2 concentration emission ΔP in flue gas after changing the number of spray layers / fault layers.

[0061] In summary, for the coastal coal-fired power plant in this embodiment, it can be implemented according to... The fitting equation at an ion concentration of 90 mg / L is used to calculate the expected change ΔP in flue gas SO2 concentration emissions after changing the number of spray layers / discontinuities, meaning that it is no longer necessary to consider... The effect of ion concentration (variation in the range of 65–120 mg / L) on the change in SO2 concentration emission in flue gas after changing the number of spray layers / discontinuities.

[0062] 2. Establish a calculation model for the expected change in flue gas SO2 concentration emissions after changing the number of spray layers / fault layers, without considering the seawater alkalinity factor;

[0063] Based on the analysis in Part 1 of Step Two, seawater can be used for this coastal coal-fired power plant. The fitted curve equation at an ion concentration of 90 mg / L serves as a calculation model for the expected change in flue gas SO2 concentration emissions after changing the number of spray layers / fault layers, excluding the seawater alkalinity factor, as shown below:

[0064] △P a (Spray layer closed or one small layer open) = ±(2.1271×10 -8 X i 3 -5.96335×10 -5 X i 2 +0.07352X i -7.88331)

[0065] △P a (Spray layer closed or one large layer open) = ±(118.09633 - 0.23473X) i +2.08698×10 - 4 X i 2 -4.03368×10 -8 X i 3 )

[0066] △P a (The spray layer is closed or opened, consisting of one large layer and one small layer) = ±(49.96003 - 0.07548X) i +1.29907×10 -4 X i 2 -1.5763×10 -8X i 3 )

[0067] In the formula: X i The amount of SO2 generated during the combustion of coal, i = 1, 2, 3...n; ΔP a This is the expected change in flue gas SO2 concentration emissions after changing the number of spray layers to be opened or closed; the selection principle for "±" is: when the spray layer operation changes from a fully open state to closing the corresponding number of layers, △P a The calculation model takes a "+" sign; when the spray layer operation changes from a state where several layers have been closed to a state where the corresponding number of layers are opened, △P a The computational model takes "-".

[0068] Step 3: Based on the SO2 generation during combustion of various coal types in the power plant's inventory, and the estimated change in flue gas SO2 concentration emission ΔP after changing the number of spray layers (addition / discontinuation), a Online real-time flue gas SO2 concentration monitoring value P0 guides the determination of the seawater desulfurization spray layer activation / deactivation strategy, specifically:

[0069] Based on sampling information of coal types in the power plant's inventory, obtain the SO2 generation X during combustion of each type of coal in the power plant's inventory. i(kc) ;

[0070] Based on the established prediction of SO2 concentration emission change ΔP after changing the number of spray layers / fault layers under the condition of eliminating seawater alkalinity factor. a The calculation model is used to measure △P. a ;

[0071] Obtain the online real-time flue gas SO2 concentration monitoring value P0;

[0072] Under the premise of meeting the SO2 emission standards of power plants, according to X i(kc) , △P a P0 provides corresponding activation / deactivation strategies for the seawater desulfurization spray layer to achieve economical and energy-saving operation of the power plant.

[0073] The beneficial effects of this invention are as follows:

[0074] This invention uses big data fitting analysis to study the changes in SO2 generation during coal combustion and the SO2 concentration in flue gas after varying the number of spray layers / faults, and analyzes the effects of different seawater types. The trend of SO2 concentration emission changes in flue gas after changing the number of spray layers / fault layers under different ion concentrations, and the SO2 generation during coal combustion, as well as seawater... The effect of ion concentration on the change in flue gas SO2 concentration emission after changing the number of spray layers / faults was found to be independent of seawater. The study investigated the relationship between SO2 generation during coal combustion under the influence of ion concentration and the change in flue gas SO2 concentration emissions after changing the number of spray layers. Based on this relationship, and considering the expected change in flue gas SO2 concentration emissions after changing the number of spray layers and the online real-time flue gas SO2 concentration monitoring value, a seawater desulfurization spray layer activation / disconnection strategy was proposed, achieving SO2 emission compliance and economical and energy-saving operation of the power plant.

[0075] System Implementation Examples

[0076] According to embodiments of the present invention, a system for determining the deployment strategy of seawater desulfurization spray layers is provided. Figure 8 A schematic diagram illustrating the composition of a system for determining the activation strategy of a seawater desulfurization spray layer, provided for one or more embodiments of this specification, is shown below. Figure 8 As shown, the system for determining the activation strategy of the seawater desulfurization spray layer according to an embodiment of the present invention specifically includes:

[0077] Module 80 for calculating changes: Used to calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 emission concentration under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 emission concentration when the spray layer is fully open for the corresponding concentration.

[0078] The change calculation module 80 is specifically used for:

[0079] When the unit is at full load, the SO2 generation from coal combustion in different seawater types is collected. The SO2 concentration emission rate of flue gas under different seawater concentrations when the spray layer is fully open is used as a reference. Baseline values ​​for SO2 emissions at ion concentrations;

[0080] Based on the aforementioned benchmark values, the SO2 generation during coal combustion in different seawater conditions was calculated. The change in flue gas SO2 concentration emission relative to the baseline value when one small layer, one large layer, or one large layer and one small layer of the spray layer are closed at the ion concentration.

[0081] Model building module 82: Used to obtain the changes and calculate the SO2 generation under the same conditions during coal combustion, for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0082] The model building module 82 is specifically used for:

[0083] Preset a certain Using the change in SO2 concentration in flue gas under different ion concentrations as a baseline, calculations were made for other seawater... The deviation between the change in flue gas SO2 concentration emission and the baseline value after changing the number of spray layers / discontinuities is determined by the influence of ion concentration.

[0084] Strategy Determination Module 84: Used to determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0085] The embodiments of the present invention are system embodiments corresponding to the above method embodiments. The specific operation of each module can be understood by referring to the description of the method embodiments, and will not be repeated here.

[0086] Device Example 1

[0087] This invention provides an electronic device, such as... Figure 9 As shown, it includes: a memory 90, a processor 92, and a computer program stored in the memory 90 and executable on the processor 92. When the computer program is executed by the processor 92, it performs the following method steps:

[0088] S1. Calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 concentration emissions under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 concentration emissions when the spray layer is fully open at the corresponding concentration.

[0089] S2. Obtain the change amount, and calculate the difference in SO2 generation under the same conditions during coal combustion for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0090] S3. Determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0091] Device Example 2

[0092] This invention provides a computer-readable storage medium storing an information transmission implementation program. When executed by a processor 92, the program performs the following method steps:

[0093] S1. Calculate the SO2 generation during coal combustion in different seawater conditions when the unit is running at full load. The change in SO2 concentration emissions under different states of the spray layer at different ion concentrations compared to the baseline value of SO2 concentration emissions when the spray layer is fully open at the corresponding concentration.

[0094] S2. Obtain the change amount, and calculate the difference in SO2 generation under the same conditions during coal combustion for different seawater types. The influence deviation of ion concentration on the change was determined, and the ion concentration value with the smallest influence deviation was identified. Under this ion concentration value, a calculation model for the expected change in flue gas SO2 concentration emissions was established.

[0095] S3. Determine the seawater desulfurization spray layer activation / disconnection strategy based on the SO2 generation during coal combustion, the expected change in flue gas SO2 concentration emissions after changing the number of spray layer activation / disconnection, and the online real-time flue gas SO2 concentration monitoring value.

[0096] The computer-readable storage media described in this embodiment include, but are not limited to, ROM, RAM, disk, or optical disk.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the on-off strategy of seawater desulfurization spray layer, characterized in that, The method comprises the following steps: S1, when the unit is running at full load, the SO2 generation amount when burning different coal types is calculated respectively at different seawater ion concentrations, and the change amount of the SO2 concentration emission amount of the spray layer in different states and the reference value of the SO2 concentration emission amount of the spray layer in the full-on state corresponding to the concentration; S2, obtaining the change amount, respectively calculating the different seawater The influence deviation of ion concentration on the change amount, determining the ion concentration value with the minimum influence deviation, and establishing a calculation model of the change amount of the flue gas SO2 concentration emission prediction under the ion concentration value; the calculation method of the influence deviation is specifically: Pre-set a certain The change amount of flue gas SO2 concentration emission under the ion concentration is a reference value, and the influence deviation of other different seawater The influence deviation of the change amount of flue gas SO2 concentration emission after changing the spray layer on / off layer number and the reference value S3, determining the seawater desulfurization spray layer on / off strategy according to the SO2 generation amount when the coal is burned, the predicted change amount of the flue gas SO2 concentration emission after changing the on / off layer number of the spray layer, and the online real-time flue gas SO2 concentration monitoring value.

2. The method of claim 1, wherein, The different states of the spray layer include: a closed spray layer one-layer small layer state, a closed spray layer one-layer large layer state, and a closed spray layer one-layer large layer and one-layer small layer state.

3. The method of claim 2, wherein, The step S1 specifically comprises: When the unit is full load, the SO2 generation amount of the coal fired is collected under the condition of full opening of the spray layer of different seawater SO2 concentration of flue gas under the condition of full opening of the spray layer of different seawater The baseline value of SO2 concentration discharge under the condition of full opening of the spray layer of different seawater According to the reference value, the change amount of the flue gas SO2 concentration emission corresponding to the closing of a small layer, a large layer or a large layer and a small layer of the spray layer at different seawater ion concentrations is calculated.

4. A system for determining a spray layer off strategy for seawater desulfurization, characterized in that, The method comprises the following steps: The variation amount calculation module is configured to calculate the variation amount of SO2 concentration discharged by the spray layer in different states of the unit at full load and different seawater ion concentrations, and the SO2 concentration discharged by the spray layer in the full-on state of the spray layer corresponding to the ion concentration. The variation amount calculation module is configured to calculate the variation amount of SO2 concentration discharged by the spray layer in different states of the unit at full load and different seawater ion concentrations, and the SO2 concentration discharged by the spray layer in the full-on state of the spray layer corresponding to the ion concentration. The model establishing module is configured to obtain the variation, calculate the variation of the SO2 concentration in the flue gas under the condition that the SO2 generation amount is the same when different seawater ion concentrations are used to burn different coal types, determine the ion concentration value under which the influence deviation is the minimum, and establish a calculation model of the variation of the SO2 concentration in the flue gas under the condition that the SO2 generation amount is the same when different seawater The model establishing module is specifically used for: Pre-set a certain The amount of change in flue gas SO2 concentration emission under the ion concentration is a reference value, and the amounts of change in flue gas SO2 concentration emission under other different seawater The influence deviation of the amount of change in flue gas SO2 concentration emission after changing the spray layer on / off layer number and the reference value under the ion concentration; The strategy determining module is used for determining the seawater desulfurization spray layer on / off strategy according to the SO2 generation amount when the coal is burned, the predicted change amount of the flue gas SO2 concentration emission after changing the on / off layer number of the spray layer, and the online real-time flue gas SO2 concentration monitoring value.

5. The system of claim 4, wherein, The different states of the spray layer include: a closed spray layer one-layer small layer state, a closed spray layer one-layer large layer state, and a closed spray layer one-layer large layer and one-layer small layer state.

6. The system of claim 5, wherein, The change amount calculating module is specifically used for: When the unit is full load, the SO2 generation amount of the coal-fired is collected under the full open state of the spray layer of different seawater SO2 concentration of flue gas under the full open state of the spray layer of different seawater The baseline value of SO2 concentration discharge under different seawater According to the reference value, the change amount of the flue gas SO2 concentration emission corresponding to the closing of a small layer, a large layer or a large layer and a small layer of the spray layer at different seawater ion concentrations is calculated.

7. An electronic device, comprising: The method comprises the following steps: A processor; And A memory arranged to store computer executable instructions that, when executed, cause the processor to perform the steps of a method of determining a seawater desulfurization spray layer on / off strategy as claimed in any of claims 1-3.

8. A storage medium, characterized by A computer program product for storing computer executable instructions that, when executed, implement the steps of a method of determining a seawater desulfurization spray layer on / off strategy as claimed in any of claims 1-3.

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