Method, device and equipment for determining pressure of steam boiler and medium

Abstract

The invention discloses a pressure determination method, device and equipment for a steam boiler and a medium, and relates to the technical field of boiler pressure adjustment. Comprising the steps that the target fuel flow of a candidate steam boiler serves as a parameter, and the fuel consumption of a steam boiler group is calculated according to the fuel type of the candidate steam boiler; the target fuel flow of the candidate steam boilers is calculated with the minimum fuel consumption of the steam boiler group as the target; according to the operation efficiency of the candidate steam boilers and the fuel flow of the candidate steam boilers, the target steam yield of the candidate steam boilers is calculated; determining the steam inflow side node pressure of each candidate pipeline according to the target steam yield and the connection relation between the candidate pipelines in the steam boiler group; and determining the steam inflow side node pressure of the candidate pipeline directly connected with the candidate steam boiler as the target steam production pressure of the candidate steam boiler. According to the scheme, the steam production pressure of the candidate steam boiler is automatically determined, and the fuel utilization rate of the candidate steam boiler is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler pressure regulation, and in particular to a method, device, equipment and medium for determining the pressure of a steam boiler. Background Art

[0002] In a chemical park involving multiple industrial chains and multiple production units, the steam boiler group usually includes various types of steam boilers, including but not limited to coal-fired boilers, gas boilers, waste-fired boilers and industrial incineration boilers.

[0003] At present, researchers usually use manual methods to determine the fuel consumption of steam boilers and manually adjust the pressure of steam boilers. This technical solution has the defects of low pressure regulation efficiency of steam boilers and poor effect in adjusting the operating costs of boilers, resulting in low fuel utilization. Summary of the invention

[0004] The invention provides a method, device, equipment and medium for determining the pressure of a steam boiler to improve.

[0005] In a first aspect, the present invention provides a method for determining the pressure of a steam boiler, comprising:

[0006] Calculating the fuel consumption of the steam boiler group based on the target fuel flow rate of the candidate steam boiler and the fuel type of the candidate steam boiler;

[0007] Calculate the target fuel flow rate of the candidate steam boilers with the goal of minimizing the fuel consumption of the steam boiler group;

[0008] Calculating a target steam production of the candidate steam boiler according to the operating efficiency of the candidate steam boiler and the target fuel flow rate of the candidate steam boiler;

[0009] According to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group, the steam inlet side node pressure of each candidate pipeline is determined;

[0010] The steam inlet-side node pressure of the candidate pipeline directly connected to the candidate steam boiler is determined as the target steam production pressure of the candidate steam boiler.

[0011] In a second aspect, the present invention further provides a device for determining the pressure of a steam boiler, comprising:

[0012] a consumption determination module, for calculating the fuel consumption of the steam boiler group according to the fuel type of the candidate steam boiler, taking the target fuel flow rate of the candidate steam boiler as a parameter;

[0013] A fuel flow determination module, for calculating a target fuel flow of a candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group;

[0014] A steam production determination module, used to calculate a target steam production of a candidate steam boiler according to an operation efficiency of the candidate steam boiler and a target fuel flow rate of the candidate steam boiler;

[0015] A node pressure determination module is used to determine the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group;

[0016] The steam production pressure determination module is used to determine the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler.

[0017] In a third aspect, an embodiment of the present invention further provides an electronic device, including:

[0018] at least one processor; and

[0019] a memory communicatively coupled to at least one processor; wherein

[0020] The memory stores instructions that can be executed by at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for determining the pressure of a steam boiler provided in any embodiment of the present invention.

[0021] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the pressure of a steam boiler according to any embodiment of the present invention when executed.

[0022] The embodiment of the present invention uses the target fuel flow rate of the candidate steam boiler as a parameter, and calculates the fuel consumption of the steam boiler group according to the fuel type of the candidate steam boiler; calculates the target fuel flow rate of the candidate steam boiler with the minimum fuel consumption of the steam boiler group as the goal; calculates the target steam production of the candidate steam boiler according to the operating efficiency of the candidate steam boiler and the target fuel flow rate of the candidate steam boiler; determines the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; and determines the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler. The technical solution of the embodiment of the present invention calculates the target fuel flow rate of the candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group. Compared with the prior art method of determining the fuel flow rate by roughly judging the fuel consumption manually, the accuracy of the target fuel flow rate and the efficiency of determining the target fuel flow rate are effectively improved; the target steam production is determined according to the target fuel flow rate, and then the target steam production pressure is determined according to the target steam production, thereby realizing the automatic determination of the target steam production pressure and improving the efficiency of determining the steam production pressure; the candidate steam boiler outputs the target steam production at the target steam production pressure and minimizes the fuel consumption of the steam boiler group, thereby improving the fuel utilization rate.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1A is a flow chart of a method for determining the pressure of a steam boiler provided according to Embodiment 1 of the present invention;

[0026] Figure 1B is a schematic diagram of a steam production pressure negative feedback regulation logic provided according to Embodiment 2 of the present invention;

[0027] Figure 2A is a flow chart of a method for determining the pressure of a steam boiler provided according to Embodiment 2 of the present invention;

[0028] Figure 2B is a structural schematic diagram of a steam system provided according to Embodiment 2 of the present invention;

[0029] Figure 3 is a schematic structural diagram of a device for determining the pressure of a steam boiler provided according to Embodiment 3 of the present invention;

[0030] Figure 4 It is a structural schematic diagram of an electronic device for implementing the method for determining the pressure of a steam boiler according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second" and "third" etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] Figure 1A A flow chart of a method for determining the pressure of a steam boiler provided in Embodiment 1 of the present invention. This embodiment is applicable to the case of determining the steam production pressure of a steam boiler. The method can be executed by a pressure determination device for a steam boiler. The pressure determination device for a steam boiler can be implemented in the form of hardware and / or software and specifically configured in an electronic device, such as a server.

[0035] See also Figure 1A The method for determining the pressure of a steam boiler shown comprises:

[0036] S101 . Calculate the fuel consumption of the steam boiler group based on the target fuel flow of the candidate steam boiler and the fuel type of the candidate steam boiler.

[0037] In this embodiment, the target fuel flow rate may be the fuel flow rate in the candidate steam boiler to be determined. The fuel flow rate is the amount of fuel input into the candidate steam boiler per unit time. The candidate steam boiler may be a steam boiler whose steam production pressure is to be determined. The fuel type may include but is not limited to pulverized coal, natural gas, and propane, etc., which is not limited in the present invention. The steam boiler group may be a boiler group to which the candidate steam boiler belongs, and the steam boiler group includes at least two candidate steam boilers. The fuel consumption is the sum of the amount of fuel consumed by each candidate steam boiler in the steam boiler group per unit time. It should be noted that the unit time can be independently set by the technician according to actual needs or practical experience, which is not limited in the present invention.

[0038] Specifically, according to the fuel type of the candidate steam boiler, the consumption weight of each fuel type is determined; with the target fuel flow of the candidate steam boiler as a parameter, the first product between the fuel flow and the consumption weight of the candidate steam boiler is determined, and the sum of the first products of each candidate steam boiler in the steam boiler group is determined as the fuel consumption of the steam boiler group.

[0039] Exemplarily, the fuel consumption of the steam boiler group can be determined by the following formula:

[0040]

[0041] Where P represents the fuel consumption of the steam boiler group; n represents the number of candidate steam boilers in the steam boiler group; F i represents the fuel flow rate of candidate steam boiler i; α i represents the consumption weight of the fuel type of the candidate steam boiler i.

[0042] S102, with the goal of minimizing the fuel consumption of the steam boiler group, calculating the target fuel flow rate of the candidate steam boilers.

[0043] Specifically, with the goal of minimizing the fuel consumption of the steam boiler group, the alternative fuel flow of the candidate steam boiler is adjusted until the fuel consumption of the steam boiler group is minimized, and the alternative fuel flow corresponding to the minimum fuel consumption of the steam boiler group is determined as the target fuel flow.

[0044] S103: Calculate the target steam production of the candidate steam boiler according to the operation efficiency of the candidate steam boiler and the fuel flow rate of the candidate steam boiler.

[0045] In this embodiment, the operating efficiency of the candidate steam boiler may be the corresponding relationship between the required fuel flow of the candidate steam boiler and the steam production of the candidate steam boiler. The target steam production may be the steam production to be emitted by the candidate steam boiler.

[0046] In an optional embodiment, the correspondence between the thermal efficiency and the steam production of the candidate steam boiler is obtained; the lower heating value of the fuel corresponding to the candidate steam boiler is obtained, and the ratio between the lower heating value and the thermal efficiency is determined as the fuel flow rate, and the correspondence between the fuel flow rate and the thermal efficiency is obtained; based on the correspondence between the thermal efficiency and the steam production of the candidate steam boiler, and the correspondence between the fuel flow rate and the thermal efficiency, the correspondence between the fuel flow rate and the steam production of the candidate steam boiler is determined; based on the historical fuel flow rate of the candidate steam boiler and the historical steam production corresponding to the historical fuel flow rate, the correspondence between the fuel flow rate and the steam production of the candidate steam boiler is corrected to obtain the operating efficiency of the candidate steam boiler.

[0047] Exemplarily, the operating efficiency of the candidate steam boiler can be expressed by the following formula:

[0048] f = g(x);

[0049] Where x represents the steam production and f represents the fuel flow rate.

[0050] S104. Determine the steam inlet-side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group.

[0051] In this embodiment, the steam inflow side node may be one of the two ends of the candidate pipeline where the steam flows in; and the steam inflow measurement node pressure may be the steam pressure of the steam inflow side node.

[0052] Specifically, a certain algorithm is used to determine the steam inlet-side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group.

[0053] S105 . Determine the steam inlet-side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler.

[0054] In this embodiment, the target steam production pressure is the steam production pressure to be adjusted for the candidate steam boiler.

[0055] In an optional embodiment, the current steam production pressure of the candidate steam boiler is obtained; if the current steam production pressure is less than the target steam production pressure, the fuel feed valve opening of the candidate steam boiler is increased; if the current steam production pressure is greater than the target steam production pressure, the fuel feed valve opening of the candidate steam boiler is reduced. The current steam production pressure is the current steam production pressure of the candidate steam boiler.

[0056] Figure 1B This is a schematic diagram of the steam production pressure negative feedback regulation logic. Figure 1BAs shown, the target steam production pressure is input into the pressure gauge, and the pressure gauge monitors the current steam production pressure of the candidate steam boiler; if the current steam production pressure is less than the target steam production pressure, the fuel feed valve opening of the candidate steam boiler is increased to increase the fuel flow rate of the candidate steam boiler, thereby increasing the steam production of the candidate steam boiler. When the steam production increases to the target steam production, the steam production pressure of the candidate steam boiler reaches the target steam production pressure; if the current steam production pressure is greater than the target steam production pressure, the fuel feed valve opening of the candidate steam boiler is reduced to reduce the fuel flow rate of the candidate steam boiler, thereby reducing the steam production of the candidate steam boiler. When the steam production increases to the target steam production, the steam production pressure of the candidate steam boiler reaches the target steam production pressure.

[0057] It can be understood that by adopting the above-mentioned technical scheme, the opening of the fuel feed valve is adjusted according to the relationship between the current steam production pressure and the target steam production pressure, so that the steam production pressure of the candidate boiler reaches and maintains the target steam production pressure, thereby realizing automatic regulation of the steam production pressure of the steam boiler. Compared with the manual adjustment method in the prior art, it effectively reduces the adjustment cost and improves the intelligence level of the steam boiler.

[0058] The embodiment of the present invention uses the target fuel flow rate of the candidate steam boiler as a parameter, and calculates the fuel consumption of the steam boiler group according to the fuel type of the candidate steam boiler; calculates the target fuel flow rate of the candidate steam boiler with the minimum fuel consumption of the steam boiler group as the goal; calculates the target steam production of the candidate steam boiler according to the operating efficiency of the candidate steam boiler and the fuel flow rate of the candidate steam boiler; determines the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; and determines the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler. The technical solution of the embodiment of the present invention calculates the target fuel flow rate of the candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group. Compared with the prior art method of determining the fuel flow rate by roughly judging the fuel consumption manually, the accuracy of the target fuel flow rate and the efficiency of determining the target fuel flow rate are effectively improved; the target steam production is determined according to the target fuel flow rate, and then the target steam production pressure is determined according to the target steam production, thereby realizing the automatic determination of the target steam production pressure and improving the efficiency of determining the steam production pressure; the candidate steam boiler outputs the target steam production at the target steam production pressure and minimizes the fuel consumption of the steam boiler group, thereby improving the fuel utilization rate.

[0059] Embodiment 2

[0060] Figure 2AA flow chart of a method for determining the pressure of a steam boiler provided in the second embodiment of the present invention. Based on the technical solutions of the above embodiments, the embodiment of the present invention optimizes and improves the operation of determining the node pressure on the steam inlet side of the candidate pipeline.

[0061] Further, "determine the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group" is refined into "determine the target steam flow in each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; for each candidate pipeline, obtain the steam outlet side node pressure of the candidate pipeline, and determine the steam inlet side node pressure of the candidate pipeline according to the target steam flow, steam outlet side node pressure and pipeline parameters in the candidate pipeline" to improve the determination operation of the steam inlet side node pressure of the candidate pipeline.

[0062] It should be noted that, for the parts not described in detail in the embodiments of the present invention, reference may be made to the descriptions in the aforementioned embodiments.

[0063] See also Figure 2A The method for determining the pressure of a steam boiler shown comprises:

[0064] S201. Calculate the fuel consumption of the steam boiler group based on the target fuel flow of the candidate steam boiler and the fuel type of the candidate steam boiler.

[0065] S202, with the goal of minimizing the fuel consumption of the steam boiler group, calculating the target fuel flow rate of the candidate steam boilers.

[0066] S203: Calculate the target steam production of the candidate steam boiler according to the operation efficiency of the candidate steam boiler and the fuel flow rate of the candidate steam boiler.

[0067] S204: Determine a target steam flow rate in each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group.

[0068] In this embodiment, the target steam flow rate may be the steam flow rate in the candidate pipeline when the steam production capacity of the candidate steam boiler is the target steam production capacity.

[0069] Optionally, the target steam flow rate in each candidate pipeline is determined based on the target steam production and the connection relationship between the candidate pipelines in the steam boiler group, including: determining the connection result of the steam inlet side node of the candidate pipeline based on the connection relationship between the candidate pipelines in the steam boiler group; if the connection result is that the steam inlet side node of the candidate pipeline is connected to the candidate steam boiler, the target steam production is used as the target steam flow rate in the candidate pipeline; if the connection result is that the steam inlet side node of the candidate pipeline is connected to the steam inlet side nodes of other pipelines, the sum of the steam flows in the other pipelines is determined as the target steam flow rate in the candidate pipeline.

[0070] Figure 2B It is a schematic diagram of the structure of a steam system. Figure 2B As shown, it includes boiler A, boiler B, boiler C, boiler D, boiler E, pipeline 1-2, pipeline 2-6, pipeline 4-2, pipeline 3-4, pipeline 5-4, pipeline 7-6, pipeline 8-7, pipeline 9-7 and steam user end. Among them, boiler A is an industrial incinerator, and the steam production and steam production pressure of the boiler cannot be adjusted; boiler B, boiler C, boiler D and boiler E are candidate steam boilers; pipeline 2-6, pipeline 4-2, pipeline 3-4, pipeline 5-4, pipeline 7-6, pipeline 8-7 and pipeline 9-7 are candidate pipelines. For each candidate pipeline, the arrow end is the steam outflow side node of the candidate pipeline, and the other end is the steam inflow side node of the candidate pipeline; the steam outflow side node can be the end of the candidate pipeline where steam flows out. Taking candidate pipeline 2-6 as an example, node 2 is the steam inflow side node of candidate pipeline 2-6, and node 6 is the steam outflow side node of candidate pipeline 2-6. The steam inflow side node 2 of candidate pipeline 2-6 is connected to candidate pipeline 2-6 as the steam outflow side node of pipeline 1-2 and candidate pipeline 4-2, respectively, and the sum of the steam flow rates in pipeline 1-2 and candidate pipeline 4-2 is used as the target steam flow rate of candidate pipeline 2-6. The steam inflow side node 3 of candidate pipeline 3-4 is connected to boiler B, so the steam production of boiler B is used as the target steam flow rate of candidate pipeline 3-4.

[0071] It can be understood that by adopting the above technical scheme, it is determined through the connection relationship between the candidate pipelines whether the steam inflow side node of the candidate pipeline is connected to other pipelines or candidate steam boilers, and then the target steam flow in the candidate pipeline is determined according to the steam flow in other pipelines or the steam production of the candidate steam boiler, which can improve the accuracy of the target steam flow in the candidate pipeline.

[0072] In an optional embodiment, the target fuel flow is verified, including: verifying whether the target steam production of the candidate steam boiler is within the preset steam production range of the candidate steam boiler; verifying whether the target fuel flow of the candidate steam boiler is within the preset fuel flow range of the candidate steam boiler; verifying whether the target steam flow of the candidate pipeline is within the preset steam flow range of the candidate pipeline; verifying whether the steam production of each candidate boiler is equal to the difference between the user's steam consumption and the steam venting volume; if the target steam production of the candidate steam boiler is within the preset steam production range of the candidate steam boiler, the target fuel flow of the candidate steam boiler is within the preset fuel flow range of the candidate steam boiler, the target steam flow of the candidate pipeline is within the preset steam flow range of the candidate pipeline, and the steam production of each candidate boiler is equal to the difference between the user's steam consumption and the steam venting volume, then it is determined that the target fuel flow verification has passed; if the target fuel flow verification fails, then the target fuel flow that fails the verification is removed from the alternative fuel flows, and the step of calculating the target fuel flow of the candidate steam boiler with the minimum fuel consumption of the steam boiler group as the target is returned to update the target fuel flow; and the step of verifying the target flow is returned.

[0073] S205. For each candidate pipeline, obtain the steam outflow-side node pressure of the candidate pipeline, and determine the steam inflow-side node pressure of the candidate pipeline according to the target steam flow rate, the steam outflow-side node pressure and pipeline parameters in the candidate pipeline.

[0074] In this embodiment, the steam outflow side node may be the end of the candidate pipeline where the steam flows out; the steam outflow side node pressure is the steam pressure of the steam outflow side node. The pipeline parameters may include but are not limited to the friction resistance coefficient of the candidate pipeline, the inner diameter of the candidate pipeline, and the height difference of the candidate pipeline. Among them, the height difference of the candidate pipeline may be the height difference between the steam inflow side node and the steam outflow side node of the candidate pipeline.

[0075] Optionally, obtaining the steam outflow side node pressure of the candidate pipeline includes: obtaining the pressure of the steam user end; if the steam outflow side node of the candidate pipeline is connected to the steam user end, using the pressure of the steam user end as the steam outflow side node pressure of the candidate pipeline; if the steam outflow side node of the candidate pipeline is connected to the steam inflow side node of other pipelines, using the steam inflow side node pressure of other pipelines as the steam outflow side node pressure of the candidate pipeline.

[0076] The pressure at the steam user end can be set by the technicians according to actual needs or practical experience, and the present invention does not limit this. Figure 2BAs shown, the steam outflow side node of the candidate pipeline 2-6 is connected to the steam user end, that is, the pressure of the steam outflow side node 6 of the candidate pipeline 2-6 is the steam user end pressure; the candidate pipeline 4-2 is connected to the candidate pipeline 2-6 through the node 2, and the node 2 is the steam inflow side node of the candidate pipeline 2-6 and the steam outflow side node of the candidate pipeline 4-2, that is, the steam inflow side node pressure in the candidate pipeline 2-6 is used as the steam outflow side node pressure in the candidate pipeline 4-2.

[0077] It can be understood that by adopting the above technical scheme, according to the connection status of the steam outflow side node of the candidate pipeline, it is determined whether to use the pressure of the steam user end as the steam outflow side node pressure of the candidate pipeline, or to use the steam inflow side node pressure of other pipelines as the steam outflow side node pressure of the candidate pipeline, thereby improving the accuracy of the steam inflow side node pressure of the candidate pipeline.

[0078] Optionally, the steam inlet side node pressure of the candidate pipeline is determined based on the target steam flow rate, the steam outflow side node pressure and pipeline parameters in the candidate pipeline, including: determining the total converted length of pipeline friction of the candidate pipeline based on the pipeline parameters of the candidate pipeline, the historical pipeline pressure drop and the historical steam flow rate of the candidate pipeline; determining the steam inlet side node pressure of the candidate pipeline based on the total converted length of pipeline friction, the target steam flow rate, pipeline parameters and the steam outflow side node pressure in the candidate pipeline.

[0079] The historical steam flow rate may be the steam flow rate flowing through the candidate pipeline in the historical unit time, and the historical pipeline pressure drop is the pressure drop of steam in the candidate pipeline under the historical steam flow rate. The historical unit time may be the previous unit time of the current unit time. The total pipeline friction converted length may be the sum of the straight pipe section length and the equivalent length of the pipeline, that is, the total length of the candidate pipeline considering the influence of steam flow resistance.

[0080] Specifically, a certain algorithm is used to determine the total pipeline friction converted length of the candidate pipeline according to the pipeline parameters of the candidate pipeline, the pipeline pressure drop of the candidate pipeline and the historical steam flow rate; the cross-sectional area of ​​the candidate pipeline is determined according to the inner diameter of the candidate pipeline in the pipeline parameters; the target steam flow rate of the candidate pipeline and the cross-sectional area of ​​the candidate pipeline are determined as the target steam average flow rate; the target steam density and the target steam average flow rate are determined according to the target steam flow rate, and the target steam kinetic energy is determined according to the target steam density and the target steam average flow rate; the friction resistance per unit length of the candidate pipeline is determined according to the inner diameter of the candidate pipeline and the friction resistance coefficient of the candidate pipeline ; The product of the friction resistance of steam on the unit length of the candidate pipeline and the target steam kinetic energy is determined as the unit length pressure drop of the candidate pipeline at the target steam flow rate; The product of the unit length pressure drop of the candidate pipeline at the target steam flow rate and the total converted length of pipeline friction is determined as the pipeline length pressure drop at the target steam flow rate; The product of the target steam density, the gravitational acceleration and the height difference of the candidate pipeline is determined as the pipeline height pressure drop at the target steam flow rate; The steam inlet side node pressure of the candidate pipeline is determined according to the pipeline length pressure drop at the target steam flow rate, the pipeline height pressure drop at the target steam flow rate and the steam outflow side node pressure. Among them, the target steam density is the steam density in the candidate pipeline at the target steam flow rate. The target steam average flow rate is the average flow rate of steam in the candidate pipeline at the target steam flow rate. The target steam kinetic energy is the kinetic energy of steam in the candidate pipeline at the target steam flow rate. The pipeline length pressure drop is the pressure drop caused by the friction resistance of steam flowing in the candidate pipeline. The pipeline height pressure drop is the pressure drop caused by the height difference of the candidate pipeline when the steam flows in the candidate pipeline.

[0081] For example, the steam inflow side node pressure of the candidate pipeline may be determined by the following formula:

[0082]

[0083] Among them, p 2 represents the node pressure on the steam inlet side; ρ 2 Indicates the steam density at the target steam flow rate; v 2 represents the average steam velocity at the target steam flow rate; g represents the acceleration of gravity; λ represents the friction resistance coefficient; L z represents the total reduced length of pipeline friction; H represents the height difference of the candidate pipeline; p 1 Represents the node pressure on the steam outflow side.

[0084] Optionally, by adopting the above-mentioned technical scheme, the equivalent total length of the candidate pipeline under the influence of friction resistance, that is, the total converted length of pipeline friction, can be determined, and the node pressure on the steam inlet side can be determined based on the total converted length of pipeline friction. In the operation of determining the node pressure on the steam inlet side, the pressure drop of the steam caused by the friction resistance of the candidate pipeline is taken into account, thereby improving the accuracy of the node pressure on the steam inlet side.

[0085] Optionally, the total converted length of pipeline friction of the candidate pipeline is determined based on the pipeline parameters of the candidate pipeline, the pipeline pressure drop of the candidate pipeline and the historical steam flow rate, including: determining the historical average steam flow rate in the candidate pipeline based on the pipeline parameters of the candidate pipeline and the historical steam flow rate in the candidate pipeline; determining the total converted length of pipeline friction of the candidate pipeline based on the historical average steam flow rate in the candidate pipeline, the pipeline parameters of the candidate pipeline and the historical pipeline pressure drop of the candidate pipeline.

[0086] Specifically, the cross-sectional area of ​​the candidate pipeline is determined according to the inner diameter of the candidate pipeline in the pipeline parameters; and the ratio of the historical steam flow of the candidate pipeline to the cross-sectional area of ​​the candidate pipeline is determined as the historical average steam flow rate in the candidate pipeline.

[0087] Exemplarily, the historical average steam flow rate in the candidate pipeline can be determined by the following formula:

[0088]

[0089] Among them, v 1 represents the historical average steam velocity; Q represents the historical steam flow rate; d represents the inner diameter of the candidate pipeline; ρ 1 Indicates the steam density at the target steam flow rate

[0090] Determine the historical steam density and the historical steam average velocity according to the historical steam flow, and determine the historical steam kinetic energy according to the historical steam density and the historical steam average velocity; determine the friction resistance per unit length of the candidate pipeline according to the inner diameter of the candidate pipeline and the friction resistance coefficient of the candidate pipeline; determine the product of the friction resistance of steam per unit length of the candidate pipeline and the historical steam kinetic energy as the pressure drop per unit length of the candidate pipeline under the historical steam flow; determine the product of the historical steam density, the acceleration of gravity and the height difference of the candidate pipeline as the pipeline height pressure drop under the historical steam flow; determine the pressure drop difference between the historical pipeline pressure drop and the pipeline height pressure drop under the historical steam flow; determine the ratio between the pressure drop difference and the pressure drop per unit length of the candidate pipeline under the historical steam flow as the total pipeline friction converted length of the candidate pipeline. Among them, the historical steam density can be the steam density in the candidate pipeline in the historical unit time; the historical steam average velocity can be the average steam velocity in the candidate pipeline in the historical unit time.

[0091] Exemplarily, the total pipeline friction converted length of the candidate pipeline can be determined by the following formula:

[0092]

[0093] Among them, L z represents the total reduced length of pipeline friction; ρ 1 represents the steam density at the historical steam flow rate; v 1 represents the average steam velocity under the historical steam flow rate; g represents the acceleration of gravity; λ represents the friction resistance coefficient; H represents the height difference of the candidate pipeline.

[0094] It can be understood that by adopting the above technical scheme, the pressure drop per unit length of the candidate pipeline under the historical steam flow rate can be determined based on the historical average steam flow rate, and then the total converted length of pipeline friction can be determined based on the pressure drop difference and the pressure drop per unit length of the candidate pipeline under the historical steam flow rate, thereby improving the accuracy of the total converted length of pipeline friction.

[0095] S206: Determine the steam inlet-side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler.

[0096] The technical solution of the embodiment of the present invention determines the target steam flow rate in each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; for each candidate pipeline, the steam outflow side node pressure of the candidate pipeline is obtained, and the steam inflow side node pressure of the candidate pipeline is determined according to the target steam flow rate, the steam outflow side node pressure and the pipeline parameters in the candidate pipeline. The technical solution of the embodiment of the present invention can determine the target steam flow rate in each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group, and then determine the steam outflow side node pressure according to the target steam flow rate, the steam outflow side node pressure and the pipeline parameters, thereby realizing the automatic determination of the steam outflow side node pressure and improving the efficiency of determining the steam outflow side node pressure.

[0097] Embodiment 3

[0098] Figure 3 A schematic diagram of the structure of a steam boiler pressure determination device provided in Embodiment 3 of the present invention. This embodiment can be applied to the case of determining the steam production pressure of a steam boiler, the device can execute a steam boiler pressure determination method, the steam boiler pressure determination device can be implemented in the form of hardware and / or software, and the device can be configured in an electronic device, such as a server.

[0099] See also Figure 3The steam boiler pressure determination device shown includes a consumption determination module 301, a fuel flow determination module 302, a steam production determination module 303, a node pressure determination module 304 and a steam production pressure determination module 305, wherein:

[0100] The consumption determination module 301 is used to calculate the fuel consumption of the steam boiler group according to the fuel type of the candidate steam boiler, taking the target fuel flow rate of the candidate steam boiler as a parameter;

[0101] A fuel flow determination module 302 is used to calculate a target fuel flow of a candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group;

[0102] The steam production determination module 303 is used to calculate the target steam production of the candidate steam boiler according to the operation efficiency of the candidate steam boiler and the fuel flow rate of the candidate steam boiler;

[0103] The node pressure determination module 304 is used to determine the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group;

[0104] The steam production pressure determination module 305 is used to determine the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler.

[0105] The embodiment of the present invention uses a consumption determination module to calculate the fuel consumption of a steam boiler group based on the fuel type of the candidate steam boiler, taking the target fuel flow of the candidate steam boiler as a parameter; a fuel flow determination module to calculate the target fuel flow of the candidate steam boiler with the minimum fuel consumption of the steam boiler group as the target; a steam production determination module to calculate the target steam production of the candidate steam boiler based on the operating efficiency of the candidate steam boiler and the fuel flow of the candidate steam boiler; a node pressure determination module to determine the steam inlet side node pressure of each candidate pipeline based on the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; a steam production pressure determination module to determine the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler. The technical solution of the embodiment of the present invention calculates the target fuel flow rate of the candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group. Compared with the prior art method of determining the fuel flow rate by roughly judging the fuel consumption manually, the accuracy of the target fuel flow rate and the efficiency of determining the target fuel flow rate are effectively improved; the target steam production is determined according to the target fuel flow rate, and then the target steam production pressure is determined according to the target steam production, thereby realizing the automatic determination of the target steam production pressure and improving the efficiency of determining the steam production pressure; the candidate steam boiler outputs the target steam production at the target steam production pressure and minimizes the fuel consumption of the steam boiler group, thereby improving the fuel utilization rate.

[0106] Optionally, the node pressure determination module 304 includes:

[0107] A steam flow determination unit, for determining a target steam flow in each candidate pipeline according to a target steam production and a connection relationship between candidate pipelines in a steam boiler group;

[0108] The node pressure determination unit is used to obtain the node pressure on the steam outflow side of each candidate pipeline, and determine the node pressure on the steam inflow side of the candidate pipeline according to the target steam flow, the node pressure on the steam outflow side and the pipeline parameters in the candidate pipeline.

[0109] Optionally, a node pressure determination unit comprises:

[0110] A pressure acquisition subunit, used to acquire the pressure of the steam user end;

[0111] A first pressure determination subunit is used for, if the steam outflow side node of the candidate pipeline is connected to the steam user end, taking the pressure of the steam user end as the pressure of the steam outflow side node of the candidate pipeline;

[0112] The second pressure determination subunit is used to use the steam inflow side node pressure of other pipelines as the steam outflow side node pressure of the candidate pipeline if the steam outflow side node of the candidate pipeline is connected to the steam inflow side node of other pipelines.

[0113] Optionally, a node pressure determination unit comprises:

[0114] The length determination subunit is used to determine the total pipeline friction converted length of the candidate pipeline according to the pipeline parameters of the candidate pipeline, the historical pipeline pressure drop and the historical steam flow of the candidate pipeline;

[0115] The third pressure determination unit is used to determine the steam inlet side node pressure of the candidate pipeline according to the total converted pipeline friction length, the target steam flow rate in the candidate pipeline, pipeline parameters and the steam outlet side node pressure.

[0116] Optional, length determination subunit, specifically used for:

[0117] Determine a historical average steam flow rate in the candidate pipeline according to pipeline parameters of the candidate pipeline and a historical steam flow rate in the candidate pipeline;

[0118] The total pipeline friction converted length of the candidate pipeline is determined according to the historical average steam flow velocity in the candidate pipeline, the pipeline parameters of the candidate pipeline and the historical pipeline pressure drop of the candidate pipeline.

[0119] Optionally, a steam flow determination unit is specifically used for:

[0120] Determine the connection result of the steam inflow side node of the candidate pipeline according to the connection relationship between the candidate pipelines in the steam boiler group;

[0121] If the connection result is that the steam inflow side node of the candidate pipeline is connected to the candidate steam boiler, the target steam production is used as the target steam flow rate in the candidate pipeline;

[0122] If the connection result is that the steam inflow measurement node of the candidate pipeline is connected to the steam inflow side nodes of other pipelines, the sum of the steam flow rates in the other pipelines is determined as the target steam flow rate in the candidate pipeline.

[0123] Optionally, the device further comprises:

[0124] The original pressure acquisition module is used to obtain the current steam production pressure of the candidate steam boiler;

[0125] A valve opening increasing module, used to increase the fuel feed valve opening of the candidate steam boiler if the current steam production pressure is less than the target steam production pressure;

[0126] The valve opening reduction module is used to reduce the fuel feed valve opening of the candidate steam boiler if the current steam production pressure is greater than the target steam production pressure.

[0127] The steam boiler pressure determination device provided in the embodiment of the present invention can execute the steam boiler pressure determination method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the steam boiler pressure determination method.

[0128] Embodiment 4

[0129] Figure 4 A schematic diagram of the structure of an electronic device 400 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0130] like Figure 4 As shown, the electronic device 400 includes at least one processor 401, and a memory connected to the at least one processor 401 in communication, such as a read-only memory (ROM) 402, a random access memory (RAM) 403, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 401 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 402 or the computer program loaded from the storage unit 408 to the random access memory (RAM) 403. In the RAM 403, various programs and data required for the operation of the electronic device 400 can also be stored. The processor 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0131] Multiple components in the electronic device 400 are connected to the I / O interface 405, including: an input unit 406, such as a keyboard, a mouse, etc.; an output unit 407, such as various types of displays, speakers, etc.; a storage unit 408, such as a disk, an optical disk, etc.; and a communication unit 409, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 409 allows the electronic device 400 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0132] The processor 401 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 401 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 401 performs the various methods and processes described above, such as a method for determining the pressure of a steam boiler.

[0133] In some embodiments, the pressure determination method of the steam boiler may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 408. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 400 via the ROM 402 and / or the communication unit 409. When the computer program is loaded into the RAM 403 and executed by the processor 401, one or more steps of the pressure determination method of the steam boiler described above may be performed. Alternatively, in other embodiments, the processor 401 may be configured to perform the pressure determination method of the steam boiler in any other appropriate manner (e.g., by means of firmware).

[0134] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0135] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0136] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0137] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0138] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0139] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS (Virtual Private Server) services.

[0140] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0141] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining the pressure of a steam boiler, characterized in that: The method comprises: Calculating the fuel consumption of the steam boiler group based on the fuel type of the candidate steam boiler and taking the target fuel flow rate of the candidate steam boiler as a parameter; Calculating a target fuel flow rate of the candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group; Calculating a target steam production of the candidate steam boiler according to the operating efficiency of the candidate steam boiler and the target fuel flow rate of the candidate steam boiler; Determining the steam inlet-side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; The steam inlet-side node pressure of the candidate pipeline directly connected to the candidate steam boiler is determined as the target steam production pressure of the candidate steam boiler.

2. The method according to claim 1, characterized in that The step of determining the steam inlet-side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group includes: Determining a target steam flow rate in each of the candidate pipelines according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; For each candidate pipeline, the steam outflow side node pressure of the candidate pipeline is obtained, and the steam inflow side node pressure of the candidate pipeline is determined according to the target steam flow, the steam outflow side node pressure and pipeline parameters in the candidate pipeline.

3. The method according to claim 2, characterized in that The step of obtaining the node pressure on the steam outflow side of the candidate pipeline includes: Get the pressure of the steam user end; If the steam outflow side node of the candidate pipeline is connected to the steam user end, the pressure of the steam user end is used as the steam outflow side node pressure of the candidate pipeline; If the steam outflow-side node of the candidate pipeline is connected to the steam inflow-side node of other pipelines, the steam inflow-side node pressure of the other pipeline is used as the steam outflow-side node pressure of the candidate pipeline.

4. The method according to claim 2, characterized in that: The step of determining the steam inflow-side node pressure of the candidate pipeline according to the target steam flow rate, the steam outflow-side node pressure and the pipeline parameters in the candidate pipeline comprises: Determine the total pipeline friction converted length of the candidate pipeline according to the pipeline parameters of the candidate pipeline, the historical pipeline pressure drop and the historical steam flow of the candidate pipeline; The steam inlet-side node pressure of the candidate pipeline is determined according to the total reduced pipeline friction length, the target steam flow rate in the candidate pipeline, pipeline parameters and the steam outlet-side node pressure.

5. The method according to claim 4, characterized in that The step of determining the total pipeline friction converted length of the candidate pipeline according to the pipeline parameters of the candidate pipeline, the historical pipeline pressure drop and the historical steam flow rate of the candidate pipeline comprises: Determining a historical average steam flow rate in the candidate pipeline according to pipeline parameters of the candidate pipeline and a historical steam flow rate in the candidate pipeline; The total pipeline friction converted length of the candidate pipeline is determined according to the historical average steam flow rate in the candidate pipeline, the pipeline parameters of the candidate pipeline and the historical pipeline pressure drop of the candidate pipeline.

6. The method according to claim 2, characterized in that Determining the target steam flow rate in each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group includes: Determine the connection result of the steam inflow side node of the candidate pipeline according to the connection relationship between the candidate pipelines in the steam boiler group; If the connection result is that the steam inflow side node of the candidate pipeline is connected to the candidate steam boiler, the target steam production is used as the target steam flow rate in the candidate pipeline; If the connection result is that the steam inflow detection node of the candidate pipeline is connected to the steam inflow side nodes of other pipelines, the sum of the steam flow rates in the other pipelines is determined as the target steam flow rate in the candidate pipeline.

7. The method according to claim 1, characterized in that The method further comprises: Obtain the current steam production pressure of the candidate steam boiler; If the current steam production pressure is less than the target steam production pressure, increasing the fuel feed valve opening of the candidate steam boiler; If the current steam production pressure is greater than the target steam production pressure, the fuel feed valve opening of the candidate steam boiler is reduced.

8. A pressure determination device for a steam boiler, characterized in that: The device comprises: a consumption determination module, configured to calculate the fuel consumption of the steam boiler group based on the target fuel flow rate of the candidate steam boiler and the fuel type of the candidate steam boiler; A fuel flow determination module, used to calculate a target fuel flow of the candidate steam boiler with the goal of minimizing the fuel consumption of the steam boiler group; a steam production determination module, configured to calculate a target steam production of the candidate steam boiler according to an operating efficiency of the candidate steam boiler and a target fuel flow rate of the candidate steam boiler; A node pressure determination module, used to determine the steam inlet side node pressure of each candidate pipeline according to the target steam production and the connection relationship between the candidate pipelines in the steam boiler group; The steam production pressure determination module is used to determine the steam inlet side node pressure of the candidate pipeline directly connected to the candidate steam boiler as the target steam production pressure of the candidate steam boiler.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the pressure of a steam boiler according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the pressure of a steam boiler according to any one of claims 1 to 7 when the instructions are executed.

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