Boiler primary air system energy-saving benefit online evaluation method and device and storage medium

Abstract

According to the boiler primary air system energy-saving benefit online evaluation method and device and the storage medium, when the energy-saving benefit of the primary air system is evaluated online, the current primary air pressure, the current primary air pressure offset and the current primary air fan power at the outlet of the fan after the primary air fan takes the energy-saving measures can be obtained; the accumulated commissioning duration of the energy-saving measures of the primary air system is obtained; and then, after the historical primary fan power before the primary fan implements the energy-saving measures is determined, the instantaneous electricity-saving quantity and the electricity-saving rate of the primary fan are calculated according to the current primary fan power and the historical primary fan power, and the energy-saving quantity and the energy-saving benefits obtained by implementing the energy-saving measures of the primary air system are calculated according to the instantaneous electricity-saving quantity and the accumulated commissioning duration. Therefore, the real-time energy-saving effect of the energy-saving measure can be obtained, the accumulated energy-saving benefit obtained by the energy-saving measure can be obtained, and the instantaneous energy-saving quantity and the energy-saving rate index of the primary air fan can be evaluated at the same time, so that the application benefit of the energy-saving measure is scientifically reflected.

Description

Technical Field

[0001] The present application relates to the technical field of coal-fired boilers, and particularly to an online evaluation method, device and storage medium for the energy-saving benefit of a boiler primary air system. Background Art

[0002] At present, in order to save plant power consumption, many energy-saving measures have been implemented in the primary air system of coal-fired boilers. For example, the transformation of the primary air duct can reduce the resistance of the primary air duct; the optimized control of the primary air system can reduce the resistance of the hot and cold air dampers of the coal mill. Schematically, as Figure 1 shown, Figure 1 is a display diagram of the energy-saving measure using the primary air pressure offset provided by the embodiment of the present application; it can be seen from Figure 1 that the variable frequency transformation of the primary air fan can reduce the resistance of the outlet damper of the primary air fan, etc.

[0003] In the prior art, after the energy-saving measures are implemented in the primary air system, the effect and benefit of the energy-saving measures are usually determined by the method of performing performance tests before and after the implementation of the energy-saving measures. However, this method has two problems: 1) The performance test is carried out under specific conditions and lacks working condition adaptability; 2) It cannot reflect the long-term benefit after the implementation of the energy-saving measures. Summary of the Invention

[0004] The purpose of the present application is to at least solve one of the above technical defects, especially the technical defects that the performance test for determining the effect and benefit of the energy-saving measures in the prior art is carried out under specific conditions, lacks working condition adaptability, and cannot reflect the long-term benefit after the implementation of the energy-saving measures.

[0005] The present application provides an online evaluation method for the energy-saving benefit of a boiler primary air system, and the method includes:

[0006] Obtain the current primary air pressure, the current primary air pressure offset, and the current primary air fan power at the outlet of the primary air fan after the energy-saving measures are implemented for the primary air fan, and obtain the cumulative operation duration of the energy-saving measures for the primary air system;

[0007] Determine the historical primary air fan power before the energy-saving measures are implemented for the primary air fan according to the current primary air pressure, the current primary air pressure offset, and the current primary air fan power;

[0008] Calculate the instantaneous power saving amount and power saving rate of the primary air fan according to the current primary air fan power and the historical primary air fan power, and calculate the energy saving amount and energy-saving benefit obtained by the primary air system after the implementation of the energy-saving measures according to the instantaneous power saving amount and the cumulative operation duration.

[0009] Optionally, when the distributed control system of the boiler only has current signals, the obtaining of the current primary air fan power after the energy-saving measures are implemented for the primary air fan includes:

[0010] Obtain the motor voltage of the primary air fan after implementing energy-saving measures, the current of the primary air fan, and the power factor of the primary air fan motor.

[0011] Calculate the current power of the primary air fan after implementing energy-saving measures based on the motor voltage, the current of the primary air fan, and the power factor.

[0012] Optionally, the formula for calculating the current power of the primary air fan after implementing energy-saving measures based on the motor voltage, the current of the primary air fan, and the power factor is as follows:

[0013] W1 = U1 * I1 * 1.732 * ∮

[0014] Wherein, U1 is the motor voltage of the primary air fan, with the unit of kV; I1 is the current of the primary air fan. When there are two primary air fans, the current of the primary air fan is the total current of the two primary air fans, with the unit of A; ∮ is the power factor of the primary air fan motor, and ∮ = f1(I1), and the function f1 is obtained through the watt-hour meter installed on the primary air fan.

[0015] Optionally, determining the historical power of the primary air fan before implementing energy-saving measures based on the current primary air pressure, the current primary air pressure offset, and the current power of the primary air fan includes:

[0016] Calculate the historical primary air pressure before implementing energy-saving measures based on the current primary air pressure and the current primary air pressure offset.

[0017] Calculate the historical power of the primary air fan before implementing energy-saving measures based on the current primary air pressure, the historical primary air pressure, the current primary air pressure offset, and the current power of the primary air fan.

[0018] Optionally, calculating the historical power of the primary air fan before implementing energy-saving measures based on the current primary air pressure, the historical primary air pressure, the current primary air pressure offset, and the current power of the primary air fan includes:

[0019] Determine the air pressure setting range of the primary air fan according to the current primary air pressure offset.

[0020] Obtain the primary air volume of the primary air fan, and determine the current fan efficiency of the primary air fan at the current primary air pressure and the historical fan efficiency at the historical primary air pressure according to the air pressure setting range and the primary air volume.

[0021] Calculate the historical primary air fan power before the energy-saving measures are implemented for the primary air fan based on the current primary air fan power, the current primary air pressure, the historical primary air pressure, the current fan efficiency, and the historical fan efficiency.

[0022] Optionally, the formula for calculating the historical primary air fan power before the energy-saving measures are implemented for the primary air fan based on the current primary air fan power, the current primary air pressure, the historical primary air pressure, the current fan efficiency, and the historical fan efficiency is as follows:

[0023]

[0024] In the formula, is the current fan efficiency of the primary air fan at the current primary air pressure P1 and the primary air volume Q. is the historical fan efficiency of the primary air fan at the historical primary air pressure P0 and the primary air volume Q. is the current primary air fan power. is the historical primary air fan power.

[0025] Optionally, calculating the energy savings and energy-saving benefits achieved by the primary air system in implementing the energy-saving measures based on the instantaneous power savings and the cumulative operation duration includes:

[0026] Calculate the energy savings achieved by the primary air system in implementing the energy-saving measures based on the instantaneous power savings and the cumulative operation duration.

[0027] Obtain the unit grid-connected electricity price or the plant electricity market procurement price input by the operator, and calculate the energy-saving benefits achieved by the primary air system in implementing the energy-saving measures based on the unit grid-connected electricity price or the plant electricity market procurement price and the energy savings.

[0028] This application also provides an on-line evaluation device for the energy-saving benefits of a boiler primary air system, including:

[0029] A data acquisition module for acquiring the current primary air pressure, the current primary air pressure offset, and the current primary air fan power at the outlet of the primary air fan after the energy-saving measures are implemented for the primary air fan, and acquiring the cumulative operation duration of the energy-saving measures for the primary air system.

[0030] A power calculation module for determining the historical primary air fan power before the energy-saving measures are implemented for the primary air fan based on the current primary air pressure, the current primary air pressure offset, and the current primary air fan power.

[0031] An index evaluation module is used to calculate the instantaneous power saving amount and power saving rate of the primary air fan according to the current primary air fan power and the historical primary air fan power, and calculate the energy saving amount and energy saving benefit obtained by implementing the energy saving measures for the primary air system according to the instantaneous power saving amount and the cumulative operation duration.

[0032] The present application also provides a computer-readable storage medium, in which computer-readable instructions are stored. When the computer-readable instructions are executed by one or more processors, the one or more processors are caused to execute the steps of the online evaluation method for the energy saving benefit of the boiler primary air system as described in any one of the above embodiments.

[0033] The present application also provides a computer device, including: one or more processors, and a memory;

[0034] The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the steps of the online evaluation method for the energy saving benefit of the boiler primary air system as described in any one of the above embodiments are executed.

[0035] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0036] The online evaluation method, device and storage medium for the energy saving benefit of the boiler primary air system provided by the present application can obtain the current primary air pressure, the current primary air pressure offset and the current primary air fan power at the outlet of the fan after implementing the energy saving measures for the primary air system, and obtain the cumulative operation duration of the energy saving measures for the primary air system when online evaluating the energy saving benefit of the primary air system; then, after determining the historical primary air fan power before implementing the energy saving measures for the primary air fan according to the current primary air pressure, the current primary air pressure offset and the current primary air fan power, the instantaneous power saving amount and power saving rate of the primary air fan can be calculated according to the current primary air fan power and the historical primary air fan power, and the energy saving amount and energy saving benefit obtained by implementing the energy saving measures for the primary air system can be calculated according to the instantaneous power saving amount and the cumulative operation duration. In this way, both the real-time energy saving effect of the energy saving measures and the cumulative energy saving benefit obtained by the energy saving measures can be obtained, and the instantaneous power saving amount and power saving rate indexes of the primary air fan can be evaluated at the same time, so as to scientifically reflect the application benefit of the energy saving measures and promote the long-term application of the energy saving measures by the operation personnel. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a display diagram of the energy-saving measure using primary air pressure offset provided by the embodiment of the present application;

[0039] Figure 2 It is a schematic flow chart of an online evaluation method for the energy-saving benefit of a boiler primary air system provided by the embodiment of the present application;

[0040] Figure 3 It is a schematic flow chart of obtaining the current primary fan power after the primary fan implements the energy-saving measure provided by the embodiment of the present application;

[0041] Figure 4 It is a schematic structural diagram of an online evaluation device for the energy-saving benefit of a boiler primary air system provided by the embodiment of the present application;

[0042] Figure 5 It is a schematic internal structure diagram of a computer device provided by the embodiment of the present application. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] In one embodiment, as Figure 2 shown, Figure 2 It is a schematic flow chart of an online evaluation method for the energy-saving benefit of a boiler primary air system provided by the embodiment of the present application; The present application provides an online evaluation method for the energy-saving benefit of a boiler primary air system, and the method may include:

[0045] S110: Obtain the current primary air pressure, current primary air pressure offset, and current primary fan power at the outlet of the fan after the primary fan implements the energy-saving measure, and obtain the cumulative operation duration of the energy-saving measure of the primary air system.

[0046] In this step, after the energy-saving measure is implemented in the primary air system of the coal-fired boiler, in order to conduct an online evaluation of the energy-saving benefit of the primary air system, the present application can obtain the current primary air pressure, current primary air pressure offset, and current primary fan power at the outlet of the fan after the primary fan implements the energy-saving measure, and obtain the cumulative operation duration of the energy-saving measure of the primary air system. In this way, the real-time energy-saving effect after implementing the energy-saving measure can be evaluated based on the current primary air pressure, current primary air pressure offset, and current primary fan power, and the cumulative energy-saving benefit obtained by the energy-saving measure can be obtained.

[0047] It is understandable that the main function of the primary air fan in the primary air system is to provide the required primary air for boiler combustion, ensuring a stable and efficient combustion process. For example, the primary air fan in the primary air system can be responsible for tasks such as transporting fuel, providing oxygen, regulating combustion, maintaining negative pressure, cooling equipment, improving combustion efficiency, and ensuring safety, thereby ensuring the stable and efficient operation of the boiler.

[0048] Therefore, the main goal of the energy-saving measures for the boiler primary air system is to minimize the primary air pressure under the condition of ensuring the primary air volume of the boiler, thereby reducing the power consumption of the primary air fan. The online evaluation method of this application is to evaluate the reduction of the primary air fan power before and after the reduction of the primary air pressure. In this process, this application can obtain the current primary air pressure, the current primary air pressure offset, and the current primary air fan power of the primary air fan through sensors, instruments, or monitoring systems, and obtain the cumulative operation duration of the energy-saving measures for the primary air system to conduct an online evaluation of the energy-saving benefits of the primary air system.

[0049] S120: Determine the historical primary air fan power before the primary air fan implements energy-saving measures based on the current primary air pressure, the current primary air pressure offset, and the current primary air fan power.

[0050] In this step, after obtaining the current primary air pressure, the current primary air pressure offset, and the current primary air fan power at the outlet of the primary air fan after the primary air fan implements energy-saving measures through S110, this application can calculate the historical primary air fan power before the primary air fan implements energy-saving measures based on the obtained relevant parameters, so that the energy-saving benefits and other indicators of the primary air system can be evaluated according to the difference in the primary air fan power before and after the implementation of energy-saving measures.

[0051] S130: Calculate the instantaneous power saving amount and power saving rate of the primary air fan based on the current primary air fan power and the historical primary air fan power, and calculate the energy saving amount and energy-saving benefits obtained by the primary air system implementing energy-saving measures based on the instantaneous power saving amount and the cumulative operation duration.

[0052] In this step, after calculating the historical primary air fan power before the primary air fan implements energy-saving measures through S120, this application can also calculate the instantaneous power saving amount and power saving rate of the primary air fan based on the current primary air fan power and the historical primary air fan power, so that the energy saving amount and energy-saving benefits obtained by the primary air system implementing energy-saving measures can be calculated based on the instantaneous power saving amount and the cumulative operation duration.

[0053] In a specific implementation manner, when this application calculates the instantaneous power saving amount and power saving rate of the primary air fan based on the current primary air fan power and the historical primary air fan power, it can be achieved through the following calculation formula:

[0054] DW = W0 - W1

[0055] DWp = DW / W0 * 100

[0056] Among them, DW is the instantaneous power saving of the primary air fan, W0 is the historical primary air fan power before the energy-saving measures are implemented for the primary air fan, W1 is the current primary air fan power after the energy-saving measures are implemented for the primary air fan, and DWp is the power saving rate of the primary air fan.

[0057] After calculating the instantaneous power saving and power saving rate of the primary air fan through the above formula, the energy savings and energy-saving benefits achieved by implementing the energy-saving measures for the primary air system can be calculated in combination with the cumulative operating duration of the primary air system, so as to scientifically reflect the application benefits of the energy-saving measures and promote the long-term application of the energy-saving measures by the operating personnel.

[0058] In the above embodiment, when online evaluating the energy-saving benefits of the primary air system, the current primary air pressure, the current primary air pressure offset, and the current primary air fan power at the outlet of the primary air fan after the energy-saving measures are implemented for the primary air fan can be obtained, as well as the cumulative operating duration of the energy-saving measures for the primary air system; then, after determining the historical primary air fan power before the energy-saving measures are implemented for the primary air fan according to the current primary air pressure, the current primary air pressure offset, and the current primary air fan power, the instantaneous power saving and power saving rate of the primary air fan can be calculated according to the current primary air fan power and the historical primary air fan power, and the energy savings and energy-saving benefits achieved by implementing the energy-saving measures for the primary air system can be calculated according to the instantaneous power saving and the cumulative operating duration. In this way, both the real-time energy-saving effect of the energy-saving measures and the cumulative energy-saving benefits achieved by the energy-saving measures can be obtained, and the instantaneous power saving and power saving rate indicators of the primary air fan can be evaluated at the same time, so as to scientifically reflect the application benefits of the energy-saving measures and promote the long-term application of the energy-saving measures by the operating personnel.

[0059] In one embodiment, as Figure 3 shown, Figure 3 is a schematic flow chart for obtaining the current primary air fan power after the energy-saving measures are implemented for the primary air fan provided by the embodiment of the present application; when there is only a current signal in the distributed control system of the boiler, obtaining the current primary air fan power after the energy-saving measures are implemented for the primary air fan in S110 may include:

[0060] S111: Obtain the motor voltage, the primary air fan current, and the power factor of the primary air fan motor after the energy-saving measures are implemented for the primary air fan.

[0061] S112: Calculate the current primary air fan power after the energy-saving measures are implemented for the primary air fan according to the motor voltage, the primary air fan current, and the power factor.

[0062] In this embodiment, the current primary air pressure, the current primary air pressure offset, and the current primary fan power after the primary fan implements energy-saving measures can all be obtained online through sensors, instruments, or monitoring systems, etc. When the distributed control system (DCS) of the boiler only has current signals and no power signals, the present application can obtain the motor voltage, the primary fan current, and the power factor of the primary fan motor after the primary fan implements energy-saving measures. In this way, the current primary fan power after the primary fan implements energy-saving measures can be calculated based on the obtained motor voltage, primary fan current, and the power factor of the primary fan motor, and then the historical primary fan power before the primary fan implements energy-saving measures can be calculated based on the obtained relevant parameters. In this way, the energy-saving benefit and other indicators of the primary air system can be evaluated based on the difference in the primary fan power before and after the implementation of energy-saving measures.

[0063] In one embodiment, the formula for calculating the current primary fan power after the primary fan implements energy-saving measures according to the motor voltage, the primary fan current, and the power factor in S112 is as follows:

[0064] W1 = U1 * I1 * 1.732 * ∮

[0065] Wherein, U1 is the motor voltage of the primary fan, with the unit of kV; I1 is the primary fan current. When there are two primary fans, the primary fan current is the total current of the two primary fans, with the unit of A; ∮ is the power factor of the primary fan motor, and ∮ = f1(I1), and the function f1 is obtained through the watt-hour meter installed on the primary fan.

[0066] In one embodiment, in S120, determining the historical primary fan power before the primary fan implements energy-saving measures according to the current primary air pressure, the current primary air pressure offset, and the current primary fan power includes:

[0067] S121: Calculate the historical primary air pressure before the primary fan implements energy-saving measures according to the current primary air pressure and the current primary air pressure offset.

[0068] S122: Calculate the historical primary fan power before the primary fan implements energy-saving measures according to the current primary air pressure, the historical primary air pressure, the current primary air pressure offset, and the current primary fan power.

[0069] In this embodiment, after obtaining the current primary air pressure, the current primary air pressure offset, and the current primary fan power of the primary fan, in order to calculate the historical primary fan power before the energy-saving measures are implemented for the primary fan, the present application can first calculate the historical primary air pressure before the energy-saving measures are implemented for the primary fan according to the current primary air pressure and the current primary air pressure offset, and then calculate the historical primary fan power before the energy-saving measures are implemented for the primary fan according to the current primary air pressure, the historical primary air pressure, the current primary air pressure offset, and the current primary fan power.

[0070] Among them, when the present application calculates the historical primary air pressure before the energy-saving measures are implemented for the primary fan, it can be achieved through the following formula:

[0071] P0 = P1 - DP

[0072] Among them, P0 is the historical primary air pressure before the energy-saving measures are implemented for the primary fan, P1 is the current primary air pressure after the energy-saving measures are implemented for the primary fan, and DP is the current primary air pressure offset after the energy-saving measures are implemented for the primary fan.

[0073] In one embodiment, in S122, calculating the historical primary fan power before the energy-saving measures are implemented for the primary fan according to the current primary air pressure, the historical primary air pressure, the current primary air pressure offset, and the current primary fan power may include:

[0074] S1221: Determine the air pressure setting range of the primary fan according to the current primary air pressure offset.

[0075] S1222: Obtain the primary air volume of the primary fan, and determine the current fan efficiency of the primary fan at the current primary air pressure and the historical fan efficiency at the historical primary air pressure according to the air pressure setting range and the primary air volume.

[0076] S1223: Calculate the historical primary fan power before the energy-saving measures are implemented for the primary fan according to the current primary fan power, the current primary air pressure, the historical primary air pressure, the current fan efficiency, and the historical fan efficiency.

[0077] In this embodiment, when calculating the historical primary fan power before the energy-saving measures are implemented for the primary fan, the air pressure setting range of the primary fan can be determined first according to the current primary air pressure offset, and then the primary air volume of the primary fan is obtained, and the current fan efficiency of the primary fan at the current primary air pressure and the historical fan efficiency at the historical primary air pressure are determined according to the air pressure setting range and the primary air volume, so that the historical primary fan power before the energy-saving measures are implemented for the primary fan can be calculated according to the current primary fan power, the current primary air pressure, the historical primary air pressure, the current fan efficiency, and the historical fan efficiency.

[0078] In a specific implementation manner, when the present application determines the air pressure setting range of the primary air fan according to the current primary air pressure offset, taking the current primary air pressure P1 after the energy-saving measures are implemented for the primary air fan as an example, the air pressure setting range DP1 of the primary air fan is centered on P1 and determined according to the possible operating magnitude of the primary air pressure offset DP after the energy-saving measures are implemented, where DP1 > DP.

[0079] Furthermore, since the primary air volume Q remains unchanged before and after the implementation of the energy-saving measures, only the primary air pressure P changes, and the primary air pressure P and the primary air volume Q are basically in a square relationship, that is:

[0080]

[0081] In the formula, k is a coefficient that can be calculated from the current primary air volume Q and the current primary air pressure P1.

[0082] Through the performance curve of the primary air fan, the present application can obtain the fan efficiency within the range of the primary air pressure at different primary air volumes Q, and the following formula can be obtained:

[0083]

[0084] Through the above formula, the current fan efficiency of the primary air fan at the current primary air pressure and the historical fan efficiency at the historical primary air pressure can be determined, and thus the historical primary air fan power before the energy-saving measures are implemented for the primary air fan can be calculated.

[0085] In an embodiment, the formula for calculating the historical primary air fan power before the energy-saving measures are implemented for the primary air fan according to the current primary air fan power, the current primary air pressure, the historical primary air pressure, the current fan efficiency, and the historical fan efficiency in S1223 is as follows:

[0086]

[0087] In the formula, is the current fan efficiency of the primary air fan at the current primary air pressure P1 and the primary air volume Q, is the historical fan efficiency of the primary air fan at the historical primary air pressure P0 and the primary air volume Q, is the current primary air fan power, is the historical primary air fan power.

[0088] In an embodiment, calculating the energy savings and energy-saving benefits obtained by the primary air system implementing the energy-saving measures according to the instantaneous power savings and the cumulative operation duration in S130 may include:

[0089] S131: Calculate the energy savings achieved by implementing the energy-saving measures for the primary air system based on the instantaneous power savings and the cumulative operation duration.

[0090] S132: Obtain the grid-connected electricity price of the unit or the electricity purchase price in the plant electricity market input by the operator, and calculate the energy-saving benefits achieved by implementing the energy-saving measures for the primary air system based on the grid-connected electricity price of the unit or the electricity purchase price in the plant electricity market and the energy savings.

[0091] In this embodiment, after calculating the instantaneous power savings of the primary air fan, the present application can also calculate the energy savings and energy-saving benefits achieved by implementing the energy-saving measures for the primary air system based on the instantaneous power savings and the cumulative operation duration of the primary air system.

[0092] Specifically, the present application can first calculate the energy savings achieved by implementing the energy-saving measures for the primary air system based on the instantaneous power savings and the cumulative operation duration, then obtain the grid-connected electricity price of the unit or the electricity purchase price in the plant electricity market input by the operator, and then calculate the energy-saving benefits achieved by implementing the energy-saving measures for the primary air system based on the grid-connected electricity price of the unit or the electricity purchase price in the plant electricity market and the energy savings. The specific formulas are as follows:

[0093]

[0094]

[0095] Among them, is the energy savings achieved by implementing the energy-saving measures for the primary air system, h is the cumulative operation duration, i is the hour, Pr is the grid-connected electricity price of the unit or the electricity purchase price in the plant electricity market, which can be input and changed by the operator, and the unit is yuan / kWh, and M is the energy-saving benefits achieved by implementing the energy-saving measures for the primary air system.

[0096] Next, the on-line evaluation device for the energy-saving benefits of the boiler primary air system provided by the embodiments of the present application will be described. The on-line evaluation device for the energy-saving benefits of the boiler primary air system described below can be correspondingly referred to the on-line evaluation method for the energy-saving benefits of the boiler primary air system described above.

[0097] In one embodiment, as Figure 4 shown, Figure 4 is a schematic structural diagram of an on-line evaluation device for the energy-saving benefits of a boiler primary air system provided by an embodiment of the present application; the present application also provides an on-line evaluation device for the energy-saving benefits of a boiler primary air system, including a data acquisition module 210, a power calculation module 220, and an index evaluation module 230, specifically including the following:

[0098] A data acquisition module 210, configured to acquire the current primary air pressure, the current primary air pressure offset, and the current primary fan power at the outlet of the primary fan after the implementation of the energy-saving measures for the primary fan, and acquire the cumulative operation duration of the energy-saving measures for the primary air system.

[0099] A power calculation module 220, configured to determine the historical primary fan power before the implementation of the energy-saving measures for the primary fan according to the current primary air pressure, the current primary air pressure offset, and the current primary fan power.

[0100] An index evaluation module 230, configured to calculate the instantaneous power savings and the power saving rate of the primary fan according to the current primary fan power and the historical primary fan power, and calculate the energy savings and the energy-saving benefits obtained by the implementation of the energy-saving measures for the primary air system according to the instantaneous power savings and the cumulative operation duration.

[0101] In the above embodiments, when online evaluating the energy-saving benefits of the primary air system, the current primary air pressure, the current primary air pressure offset, and the current primary fan power at the outlet of the primary fan after the implementation of the energy-saving measures for the primary fan can be acquired, and the cumulative operation duration of the energy-saving measures for the primary air system can be acquired; then, after determining the historical primary fan power before the implementation of the energy-saving measures for the primary fan according to the current primary air pressure, the current primary air pressure offset, and the current primary fan power, the instantaneous power savings and the power saving rate of the primary fan can be calculated according to the current primary fan power and the historical primary fan power, and the energy savings and the energy-saving benefits obtained by the implementation of the energy-saving measures for the primary air system can be calculated according to the instantaneous power savings and the cumulative operation duration. In this way, both the real-time energy-saving effect of the energy-saving measures and the cumulative energy-saving benefits obtained by the energy-saving measures can be obtained, and the instantaneous power savings and the power saving rate indexes of the primary fan can be evaluated simultaneously, so as to scientifically reflect the application benefits of the energy-saving measures and promote the long-term application of the energy-saving measures by the operation personnel.

[0102] In one embodiment, the present application further provides a computer-readable storage medium, in which computer-readable instructions are stored. When the computer-readable instructions are executed by one or more processors, one or more processors are caused to execute the steps of the online evaluation method for the energy-saving benefits of the boiler primary air system as described in any one of the above embodiments.

[0103] In one embodiment, the present application further provides a computer device, including: one or more processors, and a memory.

[0104] The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the steps of the online evaluation method for the energy-saving benefits of the boiler primary air system as described in any one of the above embodiments are executed.

[0105] Schematically, as Figure 5As shown, Figure 5 FIG. Figure 5 is a schematic internal structure diagram of a computer device provided by an embodiment of the present application. The computer device 300 may be provided as a server. Referring to Figure 5 , the computer device 300 includes a processing component 302, which further includes one or more processors, and memory resources represented by a memory 301 for storing instructions executable by the processing component 302, such as application programs. The application programs stored in the memory 301 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 302 is configured to execute instructions to perform the online evaluation method for the energy-saving benefit of the primary air system of the boiler in any of the above embodiments.

[0106] The computer device 300 may further include a power supply component 303 configured to perform power management of the computer device 300, a wired or wireless network interface 304 configured to connect the computer device 300 to a network, and an input / output (I / O) interface 305. The computer device 300 may operate based on an operating system stored in the memory 301, such as Windows Server TM, Mac OS XTM, Unix TM, Linux TM, Free BSDTM or the like.

[0107] Those skilled in the art can understand that Figure 5 the structure shown in FIG. Figure 5 is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0108] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0109] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An online evaluation method for energy-saving benefits of a boiler primary air system, characterized in that: The method comprises: Obtain the current primary wind pressure, current primary wind pressure offset and current primary wind power at the fan outlet after the primary wind fan implements energy-saving measures, and obtain the cumulative operation time of the primary wind system energy-saving measures; Determine the historical primary wind power of the primary wind fan before implementing energy-saving measures according to the current primary wind pressure, the current primary wind pressure offset and the current primary wind fan power; According to the current primary fan power and the historical primary fan power, the instantaneous power saving and power saving rate of the primary fan are calculated, and according to the instantaneous power saving and the accumulated operation time, the energy saving amount and energy saving benefit obtained by implementing energy-saving measures in the primary wind system are calculated.

2. The method for online evaluation of energy-saving benefits of boiler primary air system according to claim 1 is characterized in that: When the distributed control system of the boiler has only a current signal, the obtaining of the current primary fan power after the primary fan implements energy-saving measures includes: Obtaining the motor voltage, the primary fan current and the power factor of the primary fan motor after implementing energy-saving measures for the primary fan; The current primary fan power after the primary fan implements energy-saving measures is calculated according to the motor voltage, the primary fan current and the power factor.

3. The method for online evaluation of energy-saving benefits of boiler primary air system according to claim 2 is characterized in that: The formula for calculating the current primary fan power after the primary fan implements energy-saving measures based on the motor voltage, the primary fan current and the power factor is as follows: W1=U1*I1*1.732*∮ Among them, U1 is the motor voltage of the primary fan, in kV, I1 is the primary fan current. When there are two primary fans, the primary fan current is the total current of the two primary fans, in A, ∮ is the power factor of the primary fan motor, ∮=f1(I1), and function f1 is obtained through the electric meter installed on the primary fan.

4. The method for online evaluation of energy-saving benefits of a boiler primary air system according to claim 1 is characterized in that: The determining, according to the current primary wind pressure, the current primary wind pressure offset and the current primary wind turbine power, the historical primary wind turbine power before the primary wind turbine implements the energy-saving measures comprises: Calculating the historical primary wind pressure of the primary wind fan before implementing energy-saving measures according to the current primary wind pressure and the current primary wind pressure offset; The historical primary wind power of the primary wind fan before the implementation of energy-saving measures is calculated according to the current primary wind pressure, the historical primary wind pressure, the current primary wind pressure offset and the current primary wind fan power.

5. The method for online evaluation of energy-saving benefits of boiler primary air system according to claim 4 is characterized in that: The calculating, based on the current primary wind pressure, the historical primary wind pressure, the current primary wind pressure offset, and the current primary wind turbine power, the historical primary wind turbine power before the primary wind turbine implements the energy-saving measures includes: Determining a wind pressure setting range of the primary fan according to the current primary wind pressure offset; Obtaining a primary air volume of the primary fan, and determining a current fan efficiency of the primary fan at the current primary air pressure and a historical fan efficiency at the historical primary air pressure according to the air pressure setting range and the primary air volume; The historical primary fan power before the primary fan implements energy-saving measures is calculated according to the current primary fan power, the current primary wind pressure, the historical primary wind pressure, the current fan efficiency and the historical fan efficiency.

6. The method for online evaluation of energy-saving benefits of boiler primary air system according to claim 5 is characterized in that: The formula for calculating the historical primary fan power before the primary fan implements energy-saving measures based on the current primary fan power, the current primary wind pressure, the historical primary wind pressure, the current fan efficiency and the historical fan efficiency is as follows: In the formula, is the current fan efficiency of the primary fan at the current primary air pressure P1 and primary air volume Q, is the historical fan efficiency of the primary fan under the historical primary air pressure P0 and primary air volume Q, is the current primary fan power, is the historical primary fan power.

7. The method for online evaluation of energy-saving benefits of boiler primary air system according to claim 1 is characterized in that: The calculation of the energy saving amount and energy saving benefit obtained by implementing the energy saving measures of the primary air system according to the instantaneous energy saving amount and the accumulated operation time includes: Calculate the energy saving amount obtained by implementing energy-saving measures for the primary air system according to the instantaneous energy saving amount and the accumulated operation time; The grid-connected electricity price of the unit or the power purchase price of the plant electricity market input by the operating personnel is obtained, and the energy-saving benefits obtained by implementing energy-saving measures for the primary air system are calculated based on the grid-connected electricity price of the unit or the power purchase price of the plant electricity market and the energy saving amount.

8. An online evaluation device for energy-saving benefits of boiler primary air system, characterized in that: include: A data acquisition module is used to obtain the current primary wind pressure, current primary wind pressure offset and current primary wind power at the fan outlet after the primary fan implements energy-saving measures, and to obtain the accumulated operation time of the primary wind system energy-saving measures; A power calculation module, used to determine the historical primary wind turbine power of the primary wind turbine before implementing energy-saving measures according to the current primary wind pressure, the current primary wind pressure offset and the current primary wind turbine power; The indicator evaluation module is used to calculate the instantaneous power saving and power saving rate of the primary fan according to the current primary fan power and the historical primary fan power, and to calculate the energy saving amount and energy saving benefit obtained by implementing energy-saving measures in the primary wind system according to the instantaneous power saving and the accumulated operation time.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by one or more processors, the one or more processors execute the steps of the online evaluation method for energy-saving benefits of a boiler primary air system as described in any one of claims 1 to 7.

10. A computer device, characterized in that: include: one or more processors, and memory; The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the one or more processors, the steps of the online evaluation method for energy-saving benefits of a boiler primary air system as described in any one of claims 1 to 7 are performed.

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