Optimized operation method and device for limestone wet flue gas desulfurization slurry circulating pump

Abstract

The invention provides an optimized operation method and device for a limestone wet flue gas desulfurization slurry circulating pump. The method comprises the steps that the amount of SO2 needing to be removed in unit time in a limestone wet flue gas desulfurization system is obtained; acquiring the amount of SO2 which can be actually removed by each slurry circulating pump in the limestone wet flue gas desulfurization system in unit time; reading historical operation data of the limestone wet flue gas desulfurization system, and counting the operation frequency of each slurry circulating pump in real time based on the historical operation data; and determining the optimized operation mode of the slurry circulating pumps based on the amount of SO2 needing to be removed in unit time, the amount of SO2 actually capable of being removed in unit time and the operation frequency of each slurry circulating pump. According to the method, on the premise of evaluating the real-time output of each slurry circulating pump, the use frequency of the slurry circulating pump can be considered, and the influence of equipment blockage and other faults caused by long-term shutdown on an optimization scheme is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and in particular to a method and device for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump. Background Art

[0002] Currently, 70% of flue gas desulfurization (FGD) purification systems utilize the limestone wet flue gas desulfurization (FGD) process. The core of this process is the desulfurization slurry within the desulfurization tower, which is transported to the spray layer at the top of the tower by a slurry circulation pump. There, it undergoes a countercurrent contact reaction with sulfur dioxide (SO2) in the flue gas, thereby removing SO2 from the flue gas. The slurry circulation pump is not only the primary equipment directly impacting desulfurization efficiency in the wet desulfurization process, but also the largest power consumer in the desulfurization system, accounting for approximately 65% ​​to 76%. Therefore, the operation mode and status of the desulfurization slurry circulation pump significantly impact the safe, economical, and efficient operation of the desulfurization system.

[0003] At present, there are two main operating modes of the desulfurization slurry circulation pump:

[0004] (1) The operating personnel switch the slurry circulation pump in time according to the real-time concentration of SO2 at the main outlet and operating experience. This operating mode takes the SO2 emission standard as the main contradiction, so there is often a phenomenon of "overspray" of desulfurization slurry, that is, the number of desulfurization slurry pumps running is too high, resulting in excessive energy consumption.

[0005] (2) Intelligent operation mode driven by historical operation data. This method can provide a more scientific and objective operation combination mode based on the historical operation conditions of the unit. However, the conclusion is only applicable to this unit and is not universal. At the same time, once the unit undergoes technical transformation and overhaul, the historical operation data needs to be re-modeled.

[0006] Both of the above-mentioned common methods have the problem of low universality, that is, the resulting operating mode is only applicable to the desulfurization equipment of the target unit. Therefore, establishing an economical, efficient, and universal operating mode for the circulating slurry pump applicable to limestone wet flue gas desulfurization is of great practical significance for guiding the operation of the desulfurization system. Summary of the Invention

[0007] In view of this, the present invention provides a method and device for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump to solve at least one of the above-mentioned problems.

[0008] In order to achieve the above object, the present invention adopts the following scheme:

[0009] According to a first aspect of the present invention, a method for optimizing the operation of a slurry circulation pump for a limestone wet flue gas desulfurization system is provided, the method comprising: obtaining the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system; obtaining the amount of SO2 that can actually be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time; reading historical operation data of the limestone wet flue gas desulfurization system, and calculating in real time the operating frequency of each slurry circulation pump based on the historical operation data; and determining the optimized operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operating frequency of each slurry circulation pump.

[0010] As an embodiment of the present invention, the above method for obtaining the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system includes: based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet and the flue gas flow rate at the desulfurization inlet of the limestone wet flue gas desulfurization system, obtaining the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system.

[0011] As an embodiment of the present invention, the above method for obtaining the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time includes: obtaining the theoretical amount of SO2 that can be removed by each slurry circulation pump within the unit time based on the circulating slurry volume flow rate of each slurry circulation pump, the desulfurization slurry density value, the desulfurization slurry supernatant density value, the desulfurization slurry solid content, the mass ratio of CaCO3 in the newly added slurry to the slurry solids, and the slurry residence time; correcting the actual power of each slurry circulation pump based on the actual operating current, actual operating voltage, power factor, the desulfurization slurry density value, and the desulfurization slurry supernatant density value of each slurry circulation pump; and obtaining the actual amount of SO2 that can be removed by each slurry circulation pump within the unit time based on the rated power of each slurry circulation pump, the corresponding corrected actual power, and the theoretical amount of SO2 that can be removed within the unit time.

[0012] As an embodiment of the present invention, the above method of determining the optimal operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operating frequency of each slurry circulation pump includes:

[0013] If the operating frequency of each slurry circulation pump is greater than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula:

[0014]

[0015] If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump satisfies the following formula:

[0016]

[0017] Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

[0018] According to a second aspect of the present invention, there is provided a device for optimizing the operation of a slurry circulation pump for a limestone wet flue gas desulfurization process, the device comprising: a first desulfurization amount acquisition unit for acquiring the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system; a second desulfurization amount acquisition unit for acquiring the amount of SO2 that can actually be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time; an operation frequency statistics unit for reading historical operation data of the limestone wet flue gas desulfurization system and, based on the historical operation data, performing real-time statistics on the operation frequency of each slurry circulation pump; and an optimization mode determination unit for determining the optimized operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operation frequency of each slurry circulation pump.

[0019] As an embodiment of the present invention, the above-mentioned first desulfurization amount acquisition unit is specifically used to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet and the flue gas flow at the desulfurization inlet in the limestone wet flue gas desulfurization system.

[0020] As an embodiment of the present invention, the above-mentioned second desulfurization amount acquisition unit includes: a theoretical removal calculation module, which is used to obtain the amount of SO2 that each slurry circulation pump can theoretically remove within the unit time based on the circulating slurry volume flow rate of each slurry circulation pump, the desulfurization slurry density value, the desulfurization slurry supernatant density value, the desulfurization slurry solid content, the mass ratio of CaCO3 in the newly added slurry to the slurry solids and the slurry residence time; a power correction module, which is used to correct the actual power of each slurry circulation pump based on the actual operating current, actual operating voltage, power factor, the desulfurization slurry density value and the desulfurization slurry supernatant density value of each slurry circulation pump; an actual removal calculation module, which is used to obtain the amount of SO2 that each slurry circulation pump can actually remove within the unit time based on the rated power of each slurry circulation pump, the corresponding corrected actual power and the theoretical amount of SO2 that can be removed within the unit time.

[0021] As an embodiment of the present invention, the optimization mode determination unit is specifically configured to: if the operating frequency of each slurry circulation pump is greater than a set value, then the optimal operating mode of the slurry circulation pump satisfies the following formula:

[0022]

[0023] If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump satisfies the following formula:

[0024]

[0025] Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

[0026] According to a third aspect of the present invention, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0027] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0028] According to a fifth aspect of the present invention, there is provided a computer program product comprising a computer program / instructions, which implement the steps of the above method when executed by a processor.

[0029] The proposed method and device for optimizing the operation of slurry circulation pumps for wet limestone flue gas desulfurization (FGD) systems evaluates the real-time output of each slurry circulation pump while also taking into account its frequency of use, thereby minimizing the impact of equipment blockage and other failures caused by long-term outages on the optimization plan. This solution significantly reduces the energy consumption of slurry circulation pumps, avoiding energy waste caused by slurry overspray. It also improves the economic, safe, and environmentally friendly operation of the desulfurization system, contributing to achieving standard FGD emissions and overall optimization of plant power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 This is a flow chart of a method for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump provided in an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of a process for obtaining the actual amount of SO2 that can be removed per unit time provided in an embodiment of the present application;

[0033] Figure 3 This is a structural schematic diagram of a limestone wet flue gas desulfurization slurry circulation pump optimization operation device provided in an embodiment of the present application;

[0034] Figure 4 Schematic diagram of the structure of the second desulfurization amount acquisition unit provided in an embodiment of the present application;

[0035] Figure 5 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0037] like Figure 1 FIG2 is a flow chart of a method for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump according to an embodiment of the present application, the method comprising the following steps:

[0038] Step S101: Obtain the amount of SO2 that needs to be removed per unit time in a limestone wet flue gas desulfurization system.

[0039] In this step, in order to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system, the SO2 concentration difference at the inlet and outlet of the flue gas desulfurization system can be detected, and the amount can be obtained based on the impact of the change in SO2 concentration on the total amount.

[0040] Preferably, this step may further include: obtaining the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet, and the flue gas flow rate at the desulfurization inlet of the limestone wet flue gas desulfurization system. Specifically, the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system can be obtained by the following formula (1):

[0041]

[0042] In the above formula, is the amount of SO2 that needs to be removed per unit time, kg / h; V g is the flue gas flow rate at the desulfurization inlet, m 3 / h; C in is the SO2 concentration at the desulfurization inlet, mg / m 3 ; C out is the SO2 concentration at the desulfurization outlet, mg / m 3 .

[0043] Step S102: obtaining the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time.

[0044] Preferably, Figure 2 As shown, this step may further include the following sub-steps:

[0045] Step S1021: Based on the circulating slurry volume flow rate of each slurry circulation pump, the desulfurization slurry density value, the desulfurization slurry supernatant density value, the desulfurization slurry solid content, the mass ratio of CaCO3 in the newly added slurry to the slurry solids and the slurry residence time, the amount of SO2 that each slurry circulation pump can theoretically remove in the unit time is obtained.

[0046] Specifically, the amount of SO2 that each slurry circulation pump can theoretically remove in the unit time is obtained by the following formula (2):

[0047]

[0048] in, Q is the theoretical amount of SO2 that can be removed from the flue gas per unit time by the i-th slurry circulation pump, kg / h; Pi is the circulating slurry volume flow rate of the i-th slurry circulating pump, m 3 / h; ρ is the density of desulfurization slurry, kg / m 3 ρ sup is the density of the desulfurized slurry supernatant, kg / m 3 ; S is the solid content of desulfurization slurry, %; is the mass ratio of CaCO3 in the newly added slurry to the slurry solids; t is the slurry residence time, h.

[0049] The solid content of the desulfurized slurry in the above formula (2) and the mass ratio of CaCO3 in the newly added slurry to the slurry solids can be obtained by the following formulas (3) and (4) respectively:

[0050]

[0051] Among them, ρ gypsum is the density of gypsum, kg / m 3 , the default value is 2320; Q ls is the limestone slurry supply flow rate, m 3 / h;ρ ls is the density of limestone slurry, kg / m 3 ;S ls is the solid content of limestone slurry, %; m ls is the purity of limestone, %; V is the desulfurization slurry content in the absorption tower, m 3 .

[0052] The solid content of the limestone slurry in the above formula (4) can be further obtained by the following formula (5):

[0053]

[0054] Among them, ρ limestone is the density of limestone, kg / m 3 , the default value is 2750.

[0055] Common limestone wet flue gas desulfurization processes can be divided into single-tower single-circulation system, double-tower series system and single-tower double-circulation system. In the single-tower single-circulation system, all slurry circulation pumps are located in one absorption tower, so there is only one desulfurization slurry density value and desulfurization slurry supernatant density value; while for the double-tower series system and the single-tower double-circulation system, the slurry circulation pumps will be distributed in two absorption towers (or cycles), and the slurry density values ​​in each absorption tower (or cycle) are often different. Therefore, for the single-tower single-circulation system, the above formulas (2)-(5) can be directly used to calculate the theoretical amount of SO2 that the slurry circulation pump can remove in the unit time. For the double-tower series system and the single-tower double-circulation system, the desulfurization slurry density values ​​and desulfurization slurry supernatant density values ​​of different towers (or cycles) can be substituted into the above formulas (2)-(5) to perform their respective calculations.

[0056] Step S1022: Based on the actual operating current, actual operating voltage, power factor, density value of the desulfurized slurry and density value of the desulfurized slurry supernatant of each slurry circulation pump, the actual power of each slurry circulation pump is corrected.

[0057] As each slurry circulation pump operates, its output will decrease due to nozzle shedding, blockage, etc., so its actual power needs to be corrected.

[0058] Specifically, the actual power can be corrected according to the following formula (6):

[0059]

[0060] in, is the actual power of the ith slurry circulation pump after correction, kW; I i is the actual operating current of the ith slurry circulation pump, A; U i is the actual operating voltage of the i-th slurry circulation pump, V; is the power factor, dimensionless.

[0061] Step S1023: Based on the rated power of each slurry circulation pump, the corresponding corrected actual power and the theoretical amount of SO2 that can be removed per unit time, the actual amount of SO2 that can be removed by each slurry circulation pump per unit time is obtained.

[0062] Specifically, the amount of SO2 that can be removed by each slurry circulation pump in the unit time can be obtained according to the following formula (7):

[0063]

[0064] in, is the actual amount of SO2 that can be removed per unit time by the i-th slurry circulation pump, kg / h; P pi is the rated power of the i-th slurry circulation pump, kW.

[0065] Step S103: Read the historical operation data of the limestone wet flue gas desulfurization system, and calculate the operation frequency F of each slurry circulation pump in real time based on the historical operation data. pi .

[0066]

[0067] Among them, N pi F is the number of times the i-th slurry circulation pump has been put into operation since the last maintenance involving the desulfurization slurry circulation pump or the spray layer, dimensionless; pi It is the frequency of the i-th slurry circulation pump being put into operation since the last maintenance involving the desulfurization slurry circulation pump or the spray layer, dimensionless.

[0068] Step S104: Determine the optimal operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operation frequency of each slurry circulation pump.

[0069] Preferably, this step may further include:

[0070] If the operating frequency of each slurry circulation pump is greater than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula (9):

[0071]

[0072] If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula (10):

[0073]

[0074] Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

[0075] Equation (9) above states that, under the assumption that all pump operating frequencies meet the requirements, 1) the output of the operating pumps (the amount of SO2 that can be removed) must meet the total SO2 removal capacity; and 2) the total power of the operating pumps is minimized. Under these two constraints, the most economical operating mode that meets desulfurization requirements is achieved. Equation (10) above adds a constraint to Equation (9), and the resulting operating solution is the most economical operating mode that meets desulfurization requirements, even if pumps that do not meet the operating frequency requirements are included.

[0076] As can be seen from the above, the proposed method for optimizing the operation of slurry circulation pumps for limestone wet flue gas desulfurization (FGD) can evaluate the real-time output of each slurry circulation pump while also taking into account its frequency of use, thereby avoiding the impact of equipment blockage and other failures caused by long-term outages on the optimization plan. This solution significantly reduces the energy consumption of slurry circulation pumps, avoids energy waste caused by slurry overspray, and improves the economic, safe, and environmentally friendly operation efficiency of the desulfurization system, contributing to achieving standard FGD emissions and overall optimization of plant power consumption.

[0077] The following is a specific example of a limestone wet desulfurization system (single tower single cycle). The system is equipped with five slurry circulation pumps (represented by A, B, C, D, and E). The calculation is performed according to the method described in the patent under the following two typical operating conditions (Table 1). The SO2 concentration at the desulfurization outlet is set to the emission concentration value of 25 mg / m3 at the total discharge port of the unit. 3 , there is no long-term shutdown of the slurry circulation pump, the power coefficient of each slurry circulation pump Both are 0.9.

[0078] The corresponding slurry circulation pump operation mode can be obtained by the above method, that is, under working condition 1, the two slurry circulation pumps A and B work at the same time, while under working condition 2, the four slurry circulation pumps A, B, C, and D work at the same time.

[0079] Table 1 Optimization of slurry circulation pump operation

[0080]

[0081]

[0082]

[0083] like Figure 3 This is a schematic diagram of the structure of a limestone wet flue gas desulfurization slurry circulation pump optimization operation device provided in an embodiment of the present application. The device includes: a first desulfurization amount acquisition unit 310, a second desulfurization amount acquisition unit 320, an operation frequency statistics unit 330 and an optimization method determination unit 340, which are connected in sequence. Among them:

[0084] The first desulfurization amount obtaining unit 310 is used to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system.

[0085] The second desulfurization amount obtaining unit 320 obtains the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time.

[0086] The operation frequency statistics unit 330 is used to read the historical operation data of the limestone wet flue gas desulfurization system and to count the operation frequency of each slurry circulation pump in real time based on the historical operation data.

[0087] The optimization mode determination unit 340 is used to determine the optimized operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operation frequency of each slurry circulation pump.

[0088] Preferably, the first desulfurization amount acquisition unit 310 is specifically used to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet and the flue gas flow at the desulfurization inlet.

[0089] Preferably, Figure 4 As shown, the second desulfurization amount obtaining unit 320 includes:

[0090] The theoretical removal calculation module 321 is used to obtain the theoretical amount of SO2 that can be removed by each slurry circulation pump within the unit time based on the circulating slurry volume flow rate of each slurry circulation pump, the desulfurization slurry density value, the desulfurization slurry supernatant density value, the desulfurization slurry solid content, the mass ratio of CaCO3 in the newly added slurry to the slurry solids, and the slurry residence time;

[0091] The power correction module 322 is used to correct the actual power of each slurry circulation pump based on the actual operating current, actual operating voltage, power factor, density value of the desulfurized slurry and density value of the desulfurized slurry supernatant of each slurry circulation pump;

[0092] The actual removal calculation module 323 is used to obtain the actual amount of SO2 that each slurry circulation pump can remove in the unit time based on the rated power of each slurry circulation pump, the corresponding corrected actual power and the theoretical amount of SO2 that can be removed in the unit time.

[0093] Preferably, the optimization method determination unit 340 is specifically configured to:

[0094] If the operating frequency of each slurry circulation pump is greater than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula:

[0095]

[0096] If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump satisfies the following formula:

[0097]

[0098] Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

[0099] As can be seen from the above, the proposed device for optimizing the operation of slurry circulation pumps for limestone wet flue gas desulfurization (FGD) can evaluate the real-time output of each slurry circulation pump while also taking into account its frequency of use, thereby preventing the impact of equipment blockage and other failures caused by long-term outages on the optimization plan. This solution significantly reduces the energy consumption of the slurry circulation pumps, avoids energy waste caused by slurry overspray, and improves the economic, safe, and environmentally friendly operation efficiency of the desulfurization system, contributing to achieving standard FGD emissions and overall optimization of plant power consumption.

[0100] Figure 5 is a schematic diagram of an electronic device provided by an embodiment of the present invention. Figure 5 The electronic device shown is a general-purpose data processing device comprising a general-purpose computer hardware structure, including at least a processor 801 and a memory 802. Processor 801 and memory 802 are connected via a bus 803. Memory 802 is adapted to store one or more instructions or programs executable by processor 801. These one or more instructions or programs are executed by processor 801 to implement the steps of the aforementioned method for optimizing the operation of a slurry circulation pump for a wet limestone flue gas desulfurization process.

[0101] The above-mentioned processor 801 can be an independent microprocessor or a collection of one or more microprocessors. Thus, the processor 801 executes the commands stored in the memory 802, thereby executing the method flow of the embodiment of the present invention as described above to realize the processing of data and the control of other devices. The bus 803 connects the above-mentioned multiple components together, and at the same time connects the above-mentioned components to the display controller 804 and the display device and the input / output (IO) device 805. The input / output (IO) device 805 can be a mouse, keyboard, modem, network interface, touch input device, somatosensory input device, printer and other devices known in the art. Typically, the input / output (IO) device 805 is connected to the system through the input / output (IO) controller 806.

[0102] The memory 802 may store software components such as an operating system, a communication module, an interaction module, and an application program. Each of the modules and applications described above corresponds to a set of executable program instructions that implement one or more functions and methods described in the embodiments of the invention.

[0103] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program implements the steps of the above-mentioned method for optimizing the operation of the limestone wet flue gas desulfurization slurry circulation pump.

[0104] An embodiment of the present invention further provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned method for optimizing the operation of the limestone wet flue gas desulfurization slurry circulation pump.

[0105] The proposed method and device for optimizing the operation of slurry circulation pumps for wet limestone flue gas desulfurization (FGD) systems evaluates the real-time output of each slurry circulation pump while also taking into account its frequency of use, thereby minimizing the impact of equipment blockage and other failures caused by long-term outages on the optimization plan. This solution significantly reduces the energy consumption of slurry circulation pumps, avoiding energy waste caused by slurry overspray. It also improves the economic, safe, and environmentally friendly operation of the desulfurization system, contributing to achieving standard FGD emissions and overall optimization of plant power consumption.

[0106] Preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are apparent from this detailed description, and thus the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, the embodiments of the present invention are not intended to be limited to the precise construction and operation illustrated and described, but are intended to cover all suitable modifications and equivalents that fall within the scope thereof.

[0107] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0108] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0111] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A limestone wet flue gas desulfurization slurry circulation pump optimization operation method, characterized in that: The method comprises: Obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system; Obtaining the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time; Reading historical operating data of the limestone wet flue gas desulfurization system, and calculating the operating frequency of each slurry circulation pump in real time based on the historical operating data; The optimized operation mode of the slurry circulation pump is determined based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operation frequency of each slurry circulation pump.

2. The method for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump according to claim 1, wherein: The amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system includes: Based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet, and the flue gas flow rate at the desulfurization inlet in the limestone wet flue gas desulfurization system, the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system is obtained.

3. The method for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump according to claim 1, wherein: The method of obtaining the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time includes: Based on the circulating slurry volume flow rate of each slurry circulating pump, the desulfurization slurry density value, the desulfurization slurry supernatant density value, the desulfurization slurry solid content, the mass ratio of CaCO3 in the newly added slurry to the slurry solids, and the slurry residence time, the theoretical amount of SO2 that can be removed by each slurry circulating pump in the unit time is obtained; Correcting the actual power of each slurry circulation pump based on the actual operating current, actual operating voltage, power factor, density value of the desulfurized slurry, and density value of the desulfurized slurry supernatant; Based on the rated power of each slurry circulation pump, the corresponding corrected actual power and the theoretical amount of SO2 that can be removed per unit time, the actual amount of SO2 that can be removed by each slurry circulation pump per unit time is obtained.

4. The method for optimizing the operation of a limestone wet flue gas desulfurization slurry circulation pump according to claim 3, wherein: The method of determining the optimal operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operating frequency of each slurry circulation pump includes: If the operating frequency of each slurry circulation pump is greater than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula: If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump satisfies the following formula: Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

5. A limestone wet flue gas desulfurization slurry circulation pump optimization operation device, characterized in that: The device comprises: The first desulfurization amount obtaining unit is used to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system; The second desulfurization amount obtaining unit obtains the actual amount of SO2 that can be removed by each slurry circulation pump in the limestone wet flue gas desulfurization system within the unit time; An operation frequency statistics unit, configured to read historical operation data of the limestone wet flue gas desulfurization system and calculate the operation frequency of each slurry circulation pump in real time based on the historical operation data; The optimization mode determination unit is used to determine the optimized operation mode of the slurry circulation pump based on the amount of SO2 that needs to be removed per unit time, the amount of SO2 that can actually be removed per unit time, and the operation frequency of each slurry circulation pump.

6. The limestone wet flue gas desulfurization slurry circulation pump optimization operation device according to claim 5, characterized in that: The first desulfurization amount acquisition unit is specifically used to obtain the amount of SO2 that needs to be removed per unit time in the limestone wet flue gas desulfurization system based on the SO2 concentration at the desulfurization inlet, the SO2 concentration at the desulfurization outlet, and the flue gas flow at the desulfurization inlet.

7. The limestone wet flue gas desulfurization slurry circulation pump optimization operation device according to claim 5, characterized in that: The second desulfurization amount obtaining unit includes: The theoretical removal calculation module is used to obtain the theoretical amount of SO2 that can be removed by each slurry circulation pump in the unit time based on the circulating slurry volume flow rate of each slurry circulation pump, the density value of the desulfurization slurry, the density value of the desulfurization slurry supernatant, the solid content of the desulfurization slurry, the mass ratio of CaCO3 in the newly added slurry to the slurry solids, and the slurry residence time; A power correction module is used to correct the actual power of each slurry circulation pump based on the actual operating current, actual operating voltage, power factor, density value of the desulfurized slurry and density value of the desulfurized slurry supernatant of each slurry circulation pump; The actual removal calculation module is used to obtain the actual amount of SO2 that each slurry circulation pump can remove in the unit time based on the rated power of each slurry circulation pump, the corresponding corrected actual power and the theoretical amount of SO2 that can be removed in the unit time.

8. The limestone wet flue gas desulfurization slurry circulation pump optimization operation device according to claim 7, characterized in that: The optimization mode determination unit is specifically used for: If the operating frequency of each slurry circulation pump is greater than the set value, the optimal operating mode of the slurry circulation pump is to satisfy the following formula: If the operating frequency of the mth slurry circulation pump is less than the set value, the optimal operating mode of the slurry circulation pump satisfies the following formula: Where n is the total number of slurry circulation pumps in the limestone wet flue gas desulfurization system; The amount of SO2 that needs to be removed per unit time; is the actual amount of SO2 that can be removed per unit time by the slurry circulation pumps numbered 1-n; P is the total power of each slurry circulation pump; is the actual power after correction of the slurry circulation pump numbered 1-n; and The actual amount of SO2 that can be removed per unit time by the m-1th, mth, and m+1th slurry circulation pumps; and It is the actual power after correction of the m-1th, mth, and m+1th slurry circulation pumps.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

11. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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